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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
| commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
| tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /third_party/libsrtp | |
| parent | Initial commit. (diff) | |
| download | thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip | |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/libsrtp')
89 files changed, 31093 insertions, 0 deletions
diff --git a/third_party/libsrtp/moz.yaml b/third_party/libsrtp/moz.yaml new file mode 100644 index 0000000000..9e26cb5655 --- /dev/null +++ b/third_party/libsrtp/moz.yaml @@ -0,0 +1,44 @@ +schema: 1 + +bugzilla: + product: "Core" + component: "WebRTC: Networking" + +origin: + name: "libsrtp" + description: "Secure Real-time Transport Protocol (SRTP)" + + url: "https://github.com/cisco/libsrtp/" + license: BSD-3-Clause + license-file: LICENSE + + release: v2.4.2 (2021-09-20T16:10:47+02:00). + revision: v2.4.2 + + +updatebot: + maintainer-phab: jesup + maintainer-bz: rjesup@jesup.org + tasks: + - type: vendoring + enabled: True + +vendoring: + url: https://github.com/cisco/libsrtp + source-hosting: github + tracking: tag + vendor-directory: third_party/libsrtp/src + + exclude: + - ".*" + - ".github" + - "**" + + include: + - srtp + - crypto + - include + - test + - LICENSE + - CHANGES + - README.md diff --git a/third_party/libsrtp/src/CHANGES b/third_party/libsrtp/src/CHANGES new file mode 100644 index 0000000000..74ec4143ea --- /dev/null +++ b/third_party/libsrtp/src/CHANGES @@ -0,0 +1,321 @@ +Changelog + +2.4.2 + +#563 - Fix typo introduced by PR 559 + +2.4.1 + +Major changes + +#560 - Merge PR 559, Use a full-length key even with null ciphers + +2.4.0 + +Major changes + +#529 - Remove EKT files, this was never completed and the draft has since changed. + +#512 - Adds suport for Mbedtls as a crypto backend. + +#503 - Support apple silicon build. + +#495 - Adds support for the Meson build system. This is an alternative to Cmake and auto tools. + +Other changes + +#546 - Improve OpenSSL KDF check. + +#542 - Add void to function declarations for EVP_EncryptInit check. + +#531 - Remove dead code. + +#524 - Support running against nss >= 3.52. + +#521 - Remove references to dtls from libsrtp. + +#520 - Use nss based hmac when nss enabled. + +#519 - Move selftest vectors form backends to common files. + +#515 - Extend cmake support. + +#514 - Fix gcc11 warning by defining output length. + +#502 - Remove visual studio build files. + +#501 - cmake: Set the VERSION property of the srtp2 library. + +#500 - Fixed issue #499 with buffer overflow. + +#498 - Feature/additional error checks. + +#496 - Rework check for OPENSSL_cleanse(). + +#492 - Avoid non-existing compiler flag -O4. + +#491 - Fix two-byte RTP header extension encryption. + +#478 - Modify cmake to install crypto_types.h instead of cipher_types.h + +2.3.0 + +Major changes + +A fuzzer was added to the project based on libFuzzer. This is run as part of Google oss-fuzz, the current status can be found at https://oss-fuzz-build-logs.storage.googleapis.com/index.html#libsrtp . Details available in PR #442 and issue #393. + +CMake support was added as an alternative build system. This was primarily added to replace the Visual Studio project files currently checked in but has been extend to support building on all platforms. Initial PR #449 and #455 but has been support has been continuously improved. + +NSS support for crypto backend was added. This is can be used as an alternative to openssl. Initial PR #413 but there has been numerous improvements. + +Other changes + +PR #474 - Add flag to disable pcap dependency when build test apps. + +PR #472 - Add ci builds for ios and android. + +PR #463 - problem on srtp_aes_icm_openssl_encrypt. + +PR #471 - Allow the pcap file to be read from a physical file. + +PR #457 - Fix docs crypto_policy_* -> srtp_crypto_policy_* . + +PR #452 - crypto/cipher: Reset the EVP_CIPHER_CTX structure before each test. + +PR #444 - Extend rtp_ecoder to support RTCP and multiplexed SSRC's. + +PR #443 - rtp_decoder avoid crash when no packets found. + +PR #429 - Rand for test only. + +PR #421 - Fix GCM IV logging. + +PR #415 - Fixes unaligned trailer access. + +PR #414 - Detect and handle broken "OPENSSL_cleanse". + +2.2.0 + +Major changes + +All code has been reformatted to be consistent. A .clang-format file and format.sh script has been added that can be use to verify and enforce consistent formatting. An automated check on code formatting is now part of travis build. + +Other changes + +PR #409 - Compatibilty with LibreSSL + +PR #406 - Fix unprotect when pktlen < (2*mki_size + tag_len) + +PR #405 - Prevent potential double free + +PR #404 - Add back extern to global variables + +PR #403 - Set gcm IV directly with EVP_CipherInit_ex + +PR #401 - Fix memory access issue in srtp_get_session_keys() + +PR #398 - Fix memory access fixes when invalid profiles where used + +PR #391 - Return NULL when allocating memory of size zero + +PR #390 - Bitvector of length zero is not valid + +PR #385 - Treat warnings as errors on travis builds + +PR #388 - Moved externs from crypto_kernel into its own header + +PR #379 - Fixed several compiler warnings from Firefox builds + +PR #377 - Removed variable init code in rdbx which never gets used + +PR #381 - Added error in case the platform is not detected + +PR #376 - Add coverity scan to travis builds + +PR #374 - Add a big endian build on travis + +PR #373 - Fixed buffer size issue in test/srtp_driver.c + +PR #372 - Make rtp_decoder compile on MinGW + +PR #367 - Rename configure.in to configure.ac + +PR #365 - Replace calls to free() with srtp_crypto_free() + +PR #364 - Add valgrind to travis and fix leaks in tests + +PR #363 - Change smtp_crypto_alloc to initialize memory to zero + +PR #354 - Fix potential leak if cloning of stream fails + +PR #340 - Fix potential leak in srtp_add_stream() + +PR #323 - Fix running test in out of source builds + +Issue #316 - Remove VERSION file + +2.1.0 + +Compatibility changes + + PR #253 - Cipher type cleanup for AES + When libSRTP is compiled with OpenSSL and the AES 256 ICM cipher is used + with RTCP an incorrect initialization vector is formed. + This change will break backwards compatibility with older versions (1.5, + 2.0) of libSRTP when using the AES 256 ICM cipher with OpenSSL for RTCP. + + PR #259 - Sequence number incorrectly masked for AES GCM IV + The initialization vector for AES GCM encryption was incorrectly formed on + little endian machines. + This change will break backwards compatibility with older versions (1.5, + 2.0) of libSRTP when using the AES GCM cipher for RTCP. + + PR #287 - Fix OOB read in key generation for encrypted headers with GCM ciphers + Adds padding of GCM salt to the corresponding ICM length used for header + encryption. + This change will break backwards compatibility with version 2.0 of libSRTP + when using the header encryption extension with the AES GCM cipher. + +Major changes + + PR #204 - OpenSSL performance improvements + Changed key expansion to occur once per key instead of once per packet. + + PR #209 - Restore AES-192 under BoringSSL + BoringSSL supports AES-192 and is now enabled in libSRTP. + + PR #224 - Master Key Identifiers (MKI) Support patch + Adds MKI support with up to 4 keys. + + PR #234 - Report SSRC instead of srtp_stream_t in srtp_event_data_t + srtp_stream_t is an opaque type making the event framework almost useless. + Now the SSRC is returned instead for use as a key in the public API. + + PR #238 - Configure changes and improvements + CFLAGS check more shell neutral, quotation fixes, always generate and + install pkg-config file, improved OpenSSL discovery and linking, remove + -fPIC flag on Windows, fix shared library generation under Cygwin, replace + hardcoded CFLAGS with compiler checks, and regenerate configure after + configure.in changes. + + PR #241 & PR #261 - Improved logging API to receive log messages from libSRTP + Provides a logging API and the ability to enable logging to stdout and a + file, as well as a switch to enable all internal debug modules. + + PR #289 - Added support for set and get the roll-over-counter + Adds an API to set and get the ROC in an (S)RTP session. + + PR #304 - Fix (S)RTP and (S)RTCP for big endian machines + The structures srtp_hdr_t, srtcp_hdr_t and srtcp_trailer_t were defined + incorrectly on big endian systems. + +Other changes + + PR #149 - Don't create a symlink if there is no $(SHAREDLIBVERSION) + + PR #151 - Make srtp_driver compile for MIPS + + PR #160 - Use PKG_PROG_PKG_CONFIG to find correct pkg-config + + PR #167 - Additional RTCP and SRTCP tests + + PR #169 - Identified merge conflict created by commit 6b71fb9 + + PR #173 - Avoid error 'possibly undefined macro: AM_PROG_AR' + + PR #174 - Avoid warning 'The macro AC_TRY_LINK is obsolete.' + + PR #175 - Remove 2nd -fPIC + + PR #182 - Add a length check before reading packet data + + PR #191 - On debug, output correct endianness of SSRC + + PR #192 - Replace octet_string_is_eq with a constant-time implementation + + PR #195 - Add missing __cplusplus header guards + + PR #198 - Update sha1_driver.c to avoid memory leaks + + PR #202 - Add an explicit cast to avoid a printf format warning on macOS + + PR #205 - Update Windows build files to Visual Studio 2015 + + PR #207 - Fix to install-win.bat syntax, and add installation of x64 libraries + + PR #208 - Make replace_cipher and replace_auth public again + + PR #211 - Changes for OpenSSL 1.1.0 compatibility + + PR #213 - Add cast to `unsigned int` in call to printf in test + + PR #214 - Avoid empty initializer braces + + PR #222 - Fix issue: No consistency when use some srtp_* functions + + PR #231 - Advance version on master in preparation for 2.1 release + + PR #232 - Update Travis, do not build with OpenSSL on OSX + + PR #233 - crypto/replay/rdbx.c: Return type of srtp_index_guess from int to + int32_t + + PR #236 - test/rtp_decoder.c: Removed superfluous conditional + + PR #237 - test/rtp_decoder.c: spring cleaning + + PR #239 - octet_string_set_to_zero() delegates to OPENSSL_cleanse() if + available, if not it will use srtp_cleanse() to zero memory + + PR #243 - EKT is not really supported yet, remove from install + + PR #244 - Add simple error checking in timing test to avoid false results + + PR #245 - Add missing srtp_cipher_dealloc calls when test fails + + PR #246 - test/rtp_decoder: Add missing conditional + + PR #248 - New README.md that integrates intro, credits and references from + /doc/ and is used to generate documentation + + PR #249 - Remove support for generic aesicm from configure.in + + PR #250 - Update README.md, incorrect tag for link + + PR #255 - Cleanup outdated comment related to MKI + + PR #258 - Add AES-GCM to DTLS-SRTP Protection Profiles + + PR #263 - Cleaning up and removing duplicated and outdated code + + PR #265 - Introduction of unit test framework: CUTest + + PR #267 - crypto/kernel/err.c: Include datatypes.h + + PR #272 - Reduce literal constants + + PR #273 - SRTP AEAD SRTCP initialization vector regression tests + + PR #274 - Update Travis build - add ccache + + PR #276 - Reference and docs updates + + PR #278 - Removed crypto/test/auth_driver.c and test/lfsr.c + + PR #279 - Bump copyright year + + PR #283 - Add missing docs in srtp.h + + PR #284 - Add strict-prototypes warning if supported + + PR #291 - Use const char * for srtp_set_debug_module() + + PR #294 - Fix incorrect result of rdb_increment on overflow + + PR #300 - Standalone tests + + PR #301 - Configure fixes + + PR #302 - Fix warning regarding unused variable + + PR #303 - Makefile.in: Add gnu as match for shared lib suffix diff --git a/third_party/libsrtp/src/LICENSE b/third_party/libsrtp/src/LICENSE new file mode 100644 index 0000000000..af0a2ac312 --- /dev/null +++ b/third_party/libsrtp/src/LICENSE @@ -0,0 +1,35 @@ +/* + * + * Copyright (c) 2001-2017 Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ diff --git a/third_party/libsrtp/src/README.md b/third_party/libsrtp/src/README.md new file mode 100644 index 0000000000..b7072414b1 --- /dev/null +++ b/third_party/libsrtp/src/README.md @@ -0,0 +1,540 @@ +[](https://github.com/cisco/libsrtp/actions/workflows/cmake.yml) +[](https://travis-ci.org/cisco/libsrtp) +[](https://scan.coverity.com/projects/cisco-libsrtp) +[](https://oss-fuzz-build-logs.storage.googleapis.com/index.html#libsrtp) + +<a name="introduction-to-libsrtp"></a> +# Introduction to libSRTP + +This package provides an implementation of the Secure Real-time +Transport Protocol (SRTP), the Universal Security Transform (UST), and +a supporting cryptographic kernel. The SRTP API is documented in include/srtp.h, +and the library is in libsrtp2.a (after compilation). + +This document describes libSRTP, the Open Source Secure RTP library +from Cisco Systems, Inc. RTP is the Real-time Transport Protocol, an +IETF standard for the transport of real-time data such as telephony, +audio, and video, defined by [RFC 3550](https://tools.ietf.org/html/rfc3550). +Secure RTP (SRTP) is an RTP profile for providing confidentiality to RTP data +and authentication to the RTP header and payload. SRTP is an IETF Standard, +defined in [RFC 3711](https://tools.ietf.org/html/rfc3711), and was developed +in the IETF Audio/Video Transport (AVT) Working Group. This library supports +all of the mandatory features of SRTP, but not all of the optional features. See +the [Supported Features](#supported-features) section for more detailed information. + +This document is also used to generate the documentation files in the /doc/ +folder where a more detailed reference to the libSRTP API and related functions +can be created (requires installing doxygen.). The reference material is created +automatically from comments embedded in some of the C header files. The +documentation is organized into modules in order to improve its clarity. These +modules do not directly correspond to files. An underlying cryptographic kernel +provides much of the basic functionality of libSRTP but is mostly undocumented +because it does its work behind the scenes. + +-------------------------------------------------------------------------------- + +<a name="contact-us"></a> +# Contact Us + +- [libsrtp@lists.packetizer.com](mailto:libsrtp@lists.packetizer.com) general mailing list for news / announcements / discussions. This is an open list, see +[https://lists.packetizer.com/mailman/listinfo/libsrtp](https://lists.packetizer.com/mailman/listinfo/libsrtp) for singing up. + +- [libsrtp-security@lists.packetizer.com](mailto:libsrtp-security@lists.packetizer.com) for disclosing security issues to the libsrtp maintenance team. This is a closed list but anyone can send to it. + + +-------------------------------------------------------------------------------- + +<a name="contents"></a> +## Contents + +- [Introduction to libSRTP](#introduction-to-libsrtp) +- [Contact Us](#contact-us) + - [Contents](#contents) +- [License and Disclaimer](#license-and-disclaimer) +- [libSRTP Overview](#libsrtp-overview) + - [Secure RTP Background](#secure-rtp-background) + - [Supported Features](#supported-features) + - [Implementation Notes](#implementation-notes) +- [Installing and Building libSRTP](#installing-and-building-libsrtp) + - [Changing Build Configuration](#changing-build-configuration) + - [Using Visual Studio](#using-visual-studio) +- [Applications](#applications) + - [Example Code](#example-code) +- [Credits](#credits) +- [References](#references) + +-------------------------------------------------------------------------------- + +<a name="license-and-disclaimer"></a> +# License and Disclaimer + +libSRTP is distributed under the following license, which is included +in the source code distribution. It is reproduced in the manual in +case you got the library from another source. + +> Copyright (c) 2001-2017 Cisco Systems, Inc. All rights reserved. +> +> Redistribution and use in source and binary forms, with or without +> modification, are permitted provided that the following conditions +> are met: +> +> - Redistributions of source code must retain the above copyright +> notice, this list of conditions and the following disclaimer. +> - Redistributions in binary form must reproduce the above copyright +> notice, this list of conditions and the following disclaimer in +> the documentation and/or other materials provided with the distribution. +> - Neither the name of the Cisco Systems, Inc. nor the names of its +> contributors may be used to endorse or promote products derived +> from this software without specific prior written permission. +> +> THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +> "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +> LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS +> FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE +> COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, +> INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +> (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR +> SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +> HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, +> STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +> ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED +> OF THE POSSIBILITY OF SUCH DAMAGE. + +-------------------------------------------------------------------------------- + +<a name="libsrtp-overview"></a> +# libSRTP Overview + +libSRTP provides functions for protecting RTP and RTCP. RTP packets +can be encrypted and authenticated (using the `srtp_protect()` +function), turning them into SRTP packets. Similarly, SRTP packets +can be decrypted and have their authentication verified (using the +`srtp_unprotect()` function), turning them into RTP packets. Similar +functions apply security to RTCP packets. + +The typedef `srtp_stream_t` points to a structure holding all of the +state associated with an SRTP stream, including the keys and +parameters for cipher and message authentication functions and the +anti-replay data. A particular `srtp_stream_t` holds the information +needed to protect a particular RTP and RTCP stream. This datatype +is intentionally opaque in order to better seperate the libSRTP +API from its implementation. + +Within an SRTP session, there can be multiple streams, each +originating from a particular sender. Each source uses a distinct +stream context to protect the RTP and RTCP stream that it is +originating. The typedef `srtp_t` points to a structure holding all of +the state associated with an SRTP session. There can be multiple +stream contexts associated with a single `srtp_t`. A stream context +cannot exist indepent from an `srtp_t`, though of course an `srtp_t` can +be created that contains only a single stream context. A device +participating in an SRTP session must have a stream context for each +source in that session, so that it can process the data that it +receives from each sender. + +In libSRTP, a session is created using the function `srtp_create()`. +The policy to be implemented in the session is passed into this +function as an `srtp_policy_t` structure. A single one of these +structures describes the policy of a single stream. These structures +can also be linked together to form an entire session policy. A linked +list of `srtp_policy_t` structures is equivalent to a session policy. +In such a policy, we refer to a single `srtp_policy_t` as an *element*. + +An `srtp_policy_t` structure contains two `srtp_crypto_policy_t` structures +that describe the cryptograhic policies for RTP and RTCP, as well as +the SRTP master key and the SSRC value. The SSRC describes what to +protect (e.g. which stream), and the `srtp_crypto_policy_t` structures +describe how to protect it. The key is contained in a policy element +because it simplifies the interface to the library. In many cases, it +is desirable to use the same cryptographic policies across all of the +streams in a session, but to use a distinct key for each stream. A +`srtp_crypto_policy_t` structure can be initialized by using either the +`srtp_crypto_policy_set_rtp_default()` or `srtp_crypto_policy_set_rtcp_default()` +functions, which set a crypto policy structure to the default policies +for RTP and RTCP protection, respectively. + +-------------------------------------------------------------------------------- + +<a name="secure-rtp-background"></a> +## Secure RTP Background + +In this section we review SRTP and introduce some terms that are used +in libSRTP. An RTP session is defined by a pair of destination +transport addresses, that is, a network address plus a pair of UDP +ports for RTP and RTCP. RTCP, the RTP control protocol, is used to +coordinate between the participants in an RTP session, e.g. to provide +feedback from receivers to senders. An *SRTP session* is +similarly defined; it is just an RTP session for which the SRTP +profile is being used. An SRTP session consists of the traffic sent +to the SRTP or SRTCP destination transport addresses. Each +participant in a session is identified by a synchronization source +(SSRC) identifier. Some participants may not send any SRTP traffic; +they are called receivers, even though they send out SRTCP traffic, +such as receiver reports. + +RTP allows multiple sources to send RTP and RTCP traffic during the +same session. The synchronization source identifier (SSRC) is used to +distinguish these sources. In libSRTP, we call the SRTP and SRTCP +traffic from a particular source a *stream*. Each stream has its own +SSRC, sequence number, rollover counter, and other data. A particular +choice of options, cryptographic mechanisms, and keys is called a +*policy*. Each stream within a session can have a distinct policy +applied to it. A session policy is a collection of stream policies. + +A single policy can be used for all of the streams in a given session, +though the case in which a single *key* is shared across multiple +streams requires care. When key sharing is used, the SSRC values that +identify the streams **must** be distinct. This requirement can be +enforced by using the convention that each SRTP and SRTCP key is used +for encryption by only a single sender. In other words, the key is +shared only across streams that originate from a particular device (of +course, other SRTP participants will need to use the key for +decryption). libSRTP supports this enforcement by detecting the case +in which a key is used for both inbound and outbound data. + +-------------------------------------------------------------------------------- + +<a name="supported-features"></a> +## Supported Features + +This library supports all of the mandatory-to-implement features of +SRTP (as defined in [RFC 3711](https://tools.ietf.org/html/rfc3711)). Some of these +features can be selected (or de-selected) at run time by setting an +appropriate policy; this is done using the structure `srtp_policy_t`. +Some other behaviors of the protocol can be adapted by defining an +approriate event handler for the exceptional events; see the SRTPevents +section in the generated documentation. + +Some options that are described in the SRTP specification are not +supported. This includes + +- key derivation rates other than zero, +- the cipher F8, +- the use of the packet index to select between master keys. + +The user should be aware that it is possible to misuse this libary, +and that the result may be that the security level it provides is +inadequate. If you are implementing a feature using this library, you +will want to read the Security Considerations section of [RFC 3711](https://tools.ietf.org/html/rfc3711#section-9). +In addition, it is important that you read and understand the +terms outlined in the [License and Disclaimer](#license-and-disclaimer) section. + +-------------------------------------------------------------------------------- + +<a name="implementation-notes"></a> +## Implementation Notes + + * The `srtp_protect()` function assumes that the buffer holding the + rtp packet has enough storage allocated that the authentication + tag can be written to the end of that packet. If this assumption + is not valid, memory corruption will ensue. + + * Automated tests for the crypto functions are provided through + the `cipher_type_self_test()` and `auth_type_self_test()` functions. + These functions should be used to test each port of this code + to a new platform. + + * Replay protection is contained in the crypto engine, and + tests for it are provided. + + * This implementation provides calls to initialize, protect, and + unprotect RTP packets, and makes as few as possible assumptions + about how these functions will be called. For example, the + caller is not expected to provide packets in order (though if + they're called more than 65k out of sequence, synchronization + will be lost). + + * The sequence number in the rtp packet is used as the low 16 bits + of the sender's local packet index. Note that RTP will start its + sequence number in a random place, and the SRTP layer just jumps + forward to that number at its first invocation. An earlier + version of this library used initial sequence numbers that are + less than 32,768; this trick is no longer required as the + `rdbx_estimate_index(...)` function has been made smarter. + + * The replay window for (S)RTCP is hardcoded to 128 bits in length. + +-------------------------------------------------------------------------------- + +<a name="installing-and-building-libsrtp"></a> +# Installing and Building libSRTP + +To install libSRTP, download the latest release of the distribution +from [https://github.com/cisco/libsrtp/releases](https://github.com/cisco/libsrtp/releases). +You probably want to get the most recent release. Unpack the distribution and +extract the source files; the directory into which the source files +will go is named `libsrtp-A-B-C` where `A` is the version number, `B` is the +major release number and `C` is the minor release number. + +libSRTP uses the GNU `autoconf` and `make` utilities (BSD make will not work; if +both versions of make are on your platform, you can invoke GNU make as +`gmake`.). In the `libsrtp` directory, run the configure script and then +make: + +~~~.txt +./configure [ options ] +make +~~~ + +The configure script accepts the following options: + +Option | Description +-------------------------------|-------------------- +\-\-help \-h | Display help +\-\-enable-debug-logging | Enable debug logging in all modules +\-\-enable-log-stdout | Enable logging to stdout +\-\-enable-openssl | Enable OpenSSL crypto engine +\-\-enable-openssl-kdf | Enable OpenSSL KDF algorithm +\-\-with-log-file | Use file for logging +\-\-with-openssl-dir | Location of OpenSSL installation + +By default there is no log output, logging can be enabled to be output to stdout +or a given file using the configure options. + +This package has been tested on the following platforms: Mac OS X +(powerpc-apple-darwin1.4), Cygwin (i686-pc-cygwin), Solaris +(sparc-sun-solaris2.6), RedHat Linux 7.1 and 9 (i686-pc-linux), and +OpenBSD (sparc-unknown-openbsd2.7). + +-------------------------------------------------------------------------------- + +<a name="changing-build-configuration"></a> +## Changing Build Configuration + +To build the `./configure` script mentioned above, libSRTP relies on the +[automake](https://www.gnu.org/software/automake/) toolchain. Since +`./configure` is built from `configure.in` by automake, if you make changes in +how `./configure` works (e.g., to add a new library dependency), you will need +to rebuild `./configure` and commit the updated version. In addition to +automake itself, you will need to have the `pkgconfig` tools installed as well. + +For example, on macOS: + +``` +brew install automake pkgconfig +# Edit configure.in +autoremake -ivf +``` + +-------------------------------------------------------------------------------- +<a name="using-visual-studio"></a> +## Using Visual Studio + +On Windows one can use Visual Studio via CMake. CMake can be downloaded here: +https://cmake.org/ . To create Visual Studio build files, for example run the +following commands: + +``` +# Create build subdirectory +mkdir build +cd build + +# Make project files +cmake .. -G "Visual Studio 15 2017" + +# Or for 64 bit project files +cmake .. -G "Visual Studio 15 2017 Win64" +``` + +-------------------------------------------------------------------------------- +<a name="using-meson"></a> +## Using Meson + +On all platforms including Windows, one can build using [Meson](https://mesonbuild.org). +Steps to download Meson are here: https://mesonbuild.com/Getting-meson.html + +To build with Meson, you can do something like: + +``` +# Setup the build subdirectory +meson setup --prefix=/path/to/prefix builddir + +# Build the project +meson compile -C builddir + +# Run tests +meson test -C builddir + +# Optionally, install +meson install -C builddir +``` + +To build with Visual Studio, run the above commands from inside a Visual Studio +command prompt, or run `vcvarsall.bat` with the appropriate arguments inside +a Command Prompt. + +Note that you can also replace the above commands with the appropriate `ninja` +targets: `ninja -C build`, `ninja -C build test`, `ninja -C build install`. + +-------------------------------------------------------------------------------- + +<a name="applications"></a> +# Applications + +Several test drivers and a simple and portable srtp application are +included in the `test/` subdirectory. + +Test driver | Function tested +--------- | ------- +kernel_driver | crypto kernel (ciphers, auth funcs, rng) +srtp_driver | srtp in-memory tests (does not use the network) +rdbx_driver | rdbx (extended replay database) +roc_driver | extended sequence number functions +replay_driver | replay database +cipher_driver | ciphers +auth_driver | hash functions + +The app `rtpw` is a simple rtp application which reads words from +`/usr/dict/words` and then sends them out one at a time using [s]rtp. +Manual srtp keying uses the -k option; automated key management +using gdoi will be added later. + +usage: +~~~.txt +rtpw [[-d <debug>]* [-k|b <key> [-a][-e <key size>][-g]] [-s | -r] dest_ip dest_port] | [-l] +~~~ + +Either the -s (sender) or -r (receiver) option must be chosen. The +values `dest_ip`, `dest_port` are the IP address and UDP port to which +the dictionary will be sent, respectively. + +The options are: + +Option | Description +--------- | ------- + -s | (S)RTP sender - causes app to send words + -r | (S)RTP receive - causes app to receive words + -k <key> | use SRTP master key <key>, where the key is a hexadecimal (without the leading "0x") + -b <key> | same as -k but with base64 encoded key + -e <keysize> | encrypt/decrypt (for data confidentiality) (requires use of -k option as well) (use 128, 192, or 256 for keysize) + -g | use AES-GCM mode (must be used with -e) + -a | message authentication (requires use of -k option as well) + -l | list the available debug modules + -d <debug> | turn on debugging for module <debug> + +In order to get random 30-byte values for use as key/salt pairs , you +can use the following bash function to format the output of +`/dev/random` (where that device is available). + +~~~.txt +function randhex() { + cat /dev/random | od --read-bytes=32 --width=32 -x | awk '{ print $2 $3 $4 $5 $6 $7 $8 $9 $10 $11 $12 $13 $14 $15 $16 }' +} +~~~ + +An example of an SRTP session using two rtpw programs follows: + +~~~.txt +set k=c1eec3717da76195bb878578790af71c4ee9f859e197a414a78d5abc7451 + +[sh1]$ test/rtpw -s -k $k -e 128 -a 0.0.0.0 9999 +Security services: confidentiality message authentication +set master key/salt to C1EEC3717DA76195BB878578790AF71C/4EE9F859E197A414A78D5ABC7451 +setting SSRC to 2078917053 +sending word: A +sending word: a +sending word: aa +sending word: aal +... + +[sh2]$ test/rtpw -r -k $k -e 128 -a 0.0.0.0 9999 +security services: confidentiality message authentication +set master key/salt to C1EEC3717DA76195BB878578790AF71C/4EE9F859E197A414A78D5ABC7451 +19 octets received from SSRC 2078917053 word: A +19 octets received from SSRC 2078917053 word: a +20 octets received from SSRC 2078917053 word: aa +21 octets received from SSRC 2078917053 word: aal +... +~~~ + +-------------------------------------------------------------------------------- + +<a name="example-code"></a> +## Example Code + +This section provides a simple example of how to use libSRTP. The +example code lacks error checking, but is functional. Here we assume +that the value ssrc is already set to describe the SSRC of the stream +that we are sending, and that the functions `get_rtp_packet()` and +`send_srtp_packet()` are available to us. The former puts an RTP packet +into the buffer and returns the number of octets written to that +buffer. The latter sends the RTP packet in the buffer, given the +length as its second argument. + +~~~.c +srtp_t session; +srtp_policy_t policy; + +// Set key to predetermined value +uint8_t key[30] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, + 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, + 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D}; + +// initialize libSRTP +srtp_init(); + +// default policy values +memset(&policy, 0x0, sizeof(srtp_policy_t)); + +// set policy to describe a policy for an SRTP stream +srtp_crypto_policy_set_rtp_default(&policy.rtp); +srtp_crypto_policy_set_rtcp_default(&policy.rtcp); +policy.ssrc = ssrc; +policy.key = key; +policy.next = NULL; + +// allocate and initialize the SRTP session +srtp_create(&session, &policy); + +// main loop: get rtp packets, send srtp packets +while (1) { + char rtp_buffer[2048]; + unsigned len; + + len = get_rtp_packet(rtp_buffer); + srtp_protect(session, rtp_buffer, &len); + send_srtp_packet(rtp_buffer, len); +} +~~~ + +-------------------------------------------------------------------------------- + +<a name="credits"></a> +# Credits + +The original implementation and documentation of libSRTP was written +by David McGrew of Cisco Systems, Inc. in order to promote the use, +understanding, and interoperability of Secure RTP. Michael Jerris +contributed support for building under MSVC. Andris Pavenis +contributed many important fixes. Brian West contributed changes to +enable dynamic linking. Yves Shumann reported documentation bugs. +Randell Jesup contributed a working SRTCP implementation and other +fixes. Steve Underwood contributed x86_64 portability changes. We also give +thanks to Fredrik Thulin, Brian Weis, Mark Baugher, Jeff Chan, Bill +Simon, Douglas Smith, Bill May, Richard Preistley, Joe Tardo and +others for contributions, comments, and corrections. + +This reference material, when applicable, in this documenation was generated +using the doxygen utility for automatic documentation of source code. + +Copyright 2001-2005 by David A. McGrew, Cisco Systems, Inc. + +-------------------------------------------------------------------------------- + +<a name="references"></a> +# References + +SRTP and ICM References +September, 2005 + +Secure RTP is defined in [RFC 3711](https://tools.ietf.org/html/rfc3711). +The counter mode definition is in [Section 4.1.1](https://tools.ietf.org/html/rfc3711#section-4.1.1). + +SHA-1 is defined in [FIPS PUB 180-4](http://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.180-4.pdf). + +HMAC is defined in [RFC 2104](https://tools.ietf.org/html/rfc2104) +and HMAC-SHA1 test vectors are available +in [RFC 2202](https://tools.ietf.org/html/rfc2202#section-3). + +AES-GCM usage in SRTP is defined in [RFC 7714](https://tools.ietf.org/html/rfc7714) diff --git a/third_party/libsrtp/src/crypto/Makefile.in b/third_party/libsrtp/src/crypto/Makefile.in new file mode 100644 index 0000000000..8c2c4fabef --- /dev/null +++ b/third_party/libsrtp/src/crypto/Makefile.in @@ -0,0 +1,118 @@ +# Makefile for crypto test suite +# +# David A. McGrew +# Cisco Systems, Inc. + +srcdir = @srcdir@ +top_srcdir = @top_srcdir@ +top_builddir = @top_builddir@ +VPATH = @srcdir@ + +CC = @CC@ +INCDIR = -Iinclude -I$(srcdir)/include -I$(top_srcdir)/include +DEFS = @DEFS@ +CPPFLAGS= @CPPFLAGS@ +CFLAGS = @CFLAGS@ +LIBS = @LIBS@ +LDFLAGS = @LDFLAGS@ -L. -L.. +COMPILE = $(CC) $(DEFS) $(INCDIR) $(CPPFLAGS) $(CFLAGS) +CRYPTOLIB = -lsrtp2 +CRYPTO_LIBDIR = @CRYPTO_LIBDIR@ + +RANLIB = @RANLIB@ + +# Specify how tests should find shared libraries on macOS and Linux +# +# macOS purges DYLD_LIBRARY_PATH when spawning subprocesses, so it's +# not possible to pass this in from the outside; we have to specify +# it for any subprocesses we call. No support for dynamic linked +# tests on Windows. +ifneq ($(strip $(CRYPTO_LIBDIR)),) + ifneq ($(OS),Windows_NT) + UNAME_S = $(shell uname -s) + ifeq ($(UNAME_S),Linux) + FIND_LIBRARIES = LD_LIBRARY_PATH=$(CRYPTO_LIBDIR) + endif + ifeq ($(UNAME_S),Darwin) + FIND_LIBRARIES = DYLD_LIBRARY_PATH=$(CRYPTO_LIBDIR) + endif + endif +endif + +# EXE defines the suffix on executables - it's .exe for cygwin, and +# null on linux, bsd, and OS X and other OSes. we define this so that +# `make clean` will work on the cygwin platform +EXE = @EXE@ +# Random source. +USE_EXTERNAL_CRYPTO = @USE_EXTERNAL_CRYPTO@ + +ifdef ARCH + DEFS += -D$(ARCH)=1 +endif + +ifdef sysname + DEFS += -D$(sysname)=1 +endif + +.PHONY: dummy all runtest clean superclean + +dummy : all runtest + +# test applications +ifneq (1, $(USE_EXTERNAL_CRYPTO)) +AES_CALC = test/aes_calc$(EXE) +SHA1_DRIVER = test/sha1_driver$(EXE) +endif + +testapp = test/cipher_driver$(EXE) test/datatypes_driver$(EXE) \ + $(SHA1_DRIVER) test/kernel_driver$(EXE) \ + $(AES_CALC) test/env$(EXE) + +# data values used to test the aes_calc application for AES-128 +k128=000102030405060708090a0b0c0d0e0f +p128=00112233445566778899aabbccddeeff +c128=69c4e0d86a7b0430d8cdb78070b4c55a + + +# data values used to test the aes_calc application for AES-256 +k256=000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f +p256=00112233445566778899aabbccddeeff +c256=8ea2b7ca516745bfeafc49904b496089 + + +runtest: $(testapp) + $(FIND_LIBRARIES) test/env$(EXE) # print out information on the build environment + @echo "running crypto test applications..." +ifneq (1, $(USE_EXTERNAL_CRYPTO)) + $(FIND_LIBRARIES) test `test/aes_calc $(k128) $(p128)` = $(c128) + $(FIND_LIBRARIES) test `test/aes_calc $(k256) $(p256)` = $(c256) + $(FIND_LIBRARIES) test/sha1_driver$(EXE) -v >/dev/null +endif + $(FIND_LIBRARIES) test/cipher_driver$(EXE) -v >/dev/null + $(FIND_LIBRARIES) test/datatypes_driver$(EXE) -v >/dev/null + $(FIND_LIBRARIES) test/kernel_driver$(EXE) -v >/dev/null + @echo "crypto test applications passed." + + +# the rule for making object files and test apps + +%.o: %.c + $(COMPILE) -c $< -o $@ + +%$(EXE): %.c $(srcdir)/../test/getopt_s.c + $(COMPILE) $(LDFLAGS) $< $(srcdir)/../test/getopt_s.c -o $@ $(CRYPTOLIB) $(LIBS) + +all: $(testapp) + +# housekeeping functions + +clean: + rm -f $(testapp) *.o */*.o + for a in * .* */*; do if [ -f "$$a~" ] ; then rm $$a~; fi; done; + rm -f `find . -name "*.[ch]~*~"` + rm -rf latex + +superclean: clean + rm -f *core TAGS ktrace.out + +# EOF diff --git a/third_party/libsrtp/src/crypto/cipher/aes.c b/third_party/libsrtp/src/crypto/cipher/aes.c new file mode 100644 index 0000000000..a2060c53e8 --- /dev/null +++ b/third_party/libsrtp/src/crypto/cipher/aes.c @@ -0,0 +1,2167 @@ +/* + * aes.c + * + * An implemnetation of the AES block cipher. + * + * David A. McGrew + * Cisco Systems, Inc. + */ + +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "aes.h" +#include "err.h" + +/* + * we use the tables T0, T1, T2, T3, and T4 to compute AES, and + * the tables U0, U1, U2, and U4 to compute its inverse + * + * different tables are used on little-endian (Intel, VMS) and + * big-endian processors (everything else) + * + * these tables are computed using the program tables/aes_tables; use + * this program to generate different tables for porting or + * optimization on a different platform + */ + +#ifndef WORDS_BIGENDIAN +/* clang-format off */ +static const uint32_t T0[256] = { + 0xa56363c6, 0x847c7cf8, 0x997777ee, 0x8d7b7bf6, + 0xdf2f2ff, 0xbd6b6bd6, 0xb16f6fde, 0x54c5c591, + 0x50303060, 0x3010102, 0xa96767ce, 0x7d2b2b56, + 0x19fefee7, 0x62d7d7b5, 0xe6abab4d, 0x9a7676ec, + 0x45caca8f, 0x9d82821f, 0x40c9c989, 0x877d7dfa, + 0x15fafaef, 0xeb5959b2, 0xc947478e, 0xbf0f0fb, + 0xecadad41, 0x67d4d4b3, 0xfda2a25f, 0xeaafaf45, + 0xbf9c9c23, 0xf7a4a453, 0x967272e4, 0x5bc0c09b, + 0xc2b7b775, 0x1cfdfde1, 0xae93933d, 0x6a26264c, + 0x5a36366c, 0x413f3f7e, 0x2f7f7f5, 0x4fcccc83, + 0x5c343468, 0xf4a5a551, 0x34e5e5d1, 0x8f1f1f9, + 0x937171e2, 0x73d8d8ab, 0x53313162, 0x3f15152a, + 0xc040408, 0x52c7c795, 0x65232346, 0x5ec3c39d, + 0x28181830, 0xa1969637, 0xf05050a, 0xb59a9a2f, + 0x907070e, 0x36121224, 0x9b80801b, 0x3de2e2df, + 0x26ebebcd, 0x6927274e, 0xcdb2b27f, 0x9f7575ea, + 0x1b090912, 0x9e83831d, 0x742c2c58, 0x2e1a1a34, + 0x2d1b1b36, 0xb26e6edc, 0xee5a5ab4, 0xfba0a05b, + 0xf65252a4, 0x4d3b3b76, 0x61d6d6b7, 0xceb3b37d, + 0x7b292952, 0x3ee3e3dd, 0x712f2f5e, 0x97848413, + 0xf55353a6, 0x68d1d1b9, 0x0, 0x2cededc1, + 0x60202040, 0x1ffcfce3, 0xc8b1b179, 0xed5b5bb6, + 0xbe6a6ad4, 0x46cbcb8d, 0xd9bebe67, 0x4b393972, + 0xde4a4a94, 0xd44c4c98, 0xe85858b0, 0x4acfcf85, + 0x6bd0d0bb, 0x2aefefc5, 0xe5aaaa4f, 0x16fbfbed, + 0xc5434386, 0xd74d4d9a, 0x55333366, 0x94858511, + 0xcf45458a, 0x10f9f9e9, 0x6020204, 0x817f7ffe, + 0xf05050a0, 0x443c3c78, 0xba9f9f25, 0xe3a8a84b, + 0xf35151a2, 0xfea3a35d, 0xc0404080, 0x8a8f8f05, + 0xad92923f, 0xbc9d9d21, 0x48383870, 0x4f5f5f1, + 0xdfbcbc63, 0xc1b6b677, 0x75dadaaf, 0x63212142, + 0x30101020, 0x1affffe5, 0xef3f3fd, 0x6dd2d2bf, + 0x4ccdcd81, 0x140c0c18, 0x35131326, 0x2fececc3, + 0xe15f5fbe, 0xa2979735, 0xcc444488, 0x3917172e, + 0x57c4c493, 0xf2a7a755, 0x827e7efc, 0x473d3d7a, + 0xac6464c8, 0xe75d5dba, 0x2b191932, 0x957373e6, + 0xa06060c0, 0x98818119, 0xd14f4f9e, 0x7fdcdca3, + 0x66222244, 0x7e2a2a54, 0xab90903b, 0x8388880b, + 0xca46468c, 0x29eeeec7, 0xd3b8b86b, 0x3c141428, + 0x79dedea7, 0xe25e5ebc, 0x1d0b0b16, 0x76dbdbad, + 0x3be0e0db, 0x56323264, 0x4e3a3a74, 0x1e0a0a14, + 0xdb494992, 0xa06060c, 0x6c242448, 0xe45c5cb8, + 0x5dc2c29f, 0x6ed3d3bd, 0xefacac43, 0xa66262c4, + 0xa8919139, 0xa4959531, 0x37e4e4d3, 0x8b7979f2, + 0x32e7e7d5, 0x43c8c88b, 0x5937376e, 0xb76d6dda, + 0x8c8d8d01, 0x64d5d5b1, 0xd24e4e9c, 0xe0a9a949, + 0xb46c6cd8, 0xfa5656ac, 0x7f4f4f3, 0x25eaeacf, + 0xaf6565ca, 0x8e7a7af4, 0xe9aeae47, 0x18080810, + 0xd5baba6f, 0x887878f0, 0x6f25254a, 0x722e2e5c, + 0x241c1c38, 0xf1a6a657, 0xc7b4b473, 0x51c6c697, + 0x23e8e8cb, 0x7cdddda1, 0x9c7474e8, 0x211f1f3e, + 0xdd4b4b96, 0xdcbdbd61, 0x868b8b0d, 0x858a8a0f, + 0x907070e0, 0x423e3e7c, 0xc4b5b571, 0xaa6666cc, + 0xd8484890, 0x5030306, 0x1f6f6f7, 0x120e0e1c, + 0xa36161c2, 0x5f35356a, 0xf95757ae, 0xd0b9b969, + 0x91868617, 0x58c1c199, 0x271d1d3a, 0xb99e9e27, + 0x38e1e1d9, 0x13f8f8eb, 0xb398982b, 0x33111122, + 0xbb6969d2, 0x70d9d9a9, 0x898e8e07, 0xa7949433, + 0xb69b9b2d, 0x221e1e3c, 0x92878715, 0x20e9e9c9, + 0x49cece87, 0xff5555aa, 0x78282850, 0x7adfdfa5, + 0x8f8c8c03, 0xf8a1a159, 0x80898909, 0x170d0d1a, + 0xdabfbf65, 0x31e6e6d7, 0xc6424284, 0xb86868d0, + 0xc3414182, 0xb0999929, 0x772d2d5a, 0x110f0f1e, + 0xcbb0b07b, 0xfc5454a8, 0xd6bbbb6d, 0x3a16162c, +}; +/* clang-format on */ + +/* clang-format off */ +static const uint32_t T1[256] = { + 0x6363c6a5, 0x7c7cf884, 0x7777ee99, 0x7b7bf68d, + 0xf2f2ff0d, 0x6b6bd6bd, 0x6f6fdeb1, 0xc5c59154, + 0x30306050, 0x1010203, 0x6767cea9, 0x2b2b567d, + 0xfefee719, 0xd7d7b562, 0xabab4de6, 0x7676ec9a, + 0xcaca8f45, 0x82821f9d, 0xc9c98940, 0x7d7dfa87, + 0xfafaef15, 0x5959b2eb, 0x47478ec9, 0xf0f0fb0b, + 0xadad41ec, 0xd4d4b367, 0xa2a25ffd, 0xafaf45ea, + 0x9c9c23bf, 0xa4a453f7, 0x7272e496, 0xc0c09b5b, + 0xb7b775c2, 0xfdfde11c, 0x93933dae, 0x26264c6a, + 0x36366c5a, 0x3f3f7e41, 0xf7f7f502, 0xcccc834f, + 0x3434685c, 0xa5a551f4, 0xe5e5d134, 0xf1f1f908, + 0x7171e293, 0xd8d8ab73, 0x31316253, 0x15152a3f, + 0x404080c, 0xc7c79552, 0x23234665, 0xc3c39d5e, + 0x18183028, 0x969637a1, 0x5050a0f, 0x9a9a2fb5, + 0x7070e09, 0x12122436, 0x80801b9b, 0xe2e2df3d, + 0xebebcd26, 0x27274e69, 0xb2b27fcd, 0x7575ea9f, + 0x909121b, 0x83831d9e, 0x2c2c5874, 0x1a1a342e, + 0x1b1b362d, 0x6e6edcb2, 0x5a5ab4ee, 0xa0a05bfb, + 0x5252a4f6, 0x3b3b764d, 0xd6d6b761, 0xb3b37dce, + 0x2929527b, 0xe3e3dd3e, 0x2f2f5e71, 0x84841397, + 0x5353a6f5, 0xd1d1b968, 0x00000000, 0xededc12c, + 0x20204060, 0xfcfce31f, 0xb1b179c8, 0x5b5bb6ed, + 0x6a6ad4be, 0xcbcb8d46, 0xbebe67d9, 0x3939724b, + 0x4a4a94de, 0x4c4c98d4, 0x5858b0e8, 0xcfcf854a, + 0xd0d0bb6b, 0xefefc52a, 0xaaaa4fe5, 0xfbfbed16, + 0x434386c5, 0x4d4d9ad7, 0x33336655, 0x85851194, + 0x45458acf, 0xf9f9e910, 0x2020406, 0x7f7ffe81, + 0x5050a0f0, 0x3c3c7844, 0x9f9f25ba, 0xa8a84be3, + 0x5151a2f3, 0xa3a35dfe, 0x404080c0, 0x8f8f058a, + 0x92923fad, 0x9d9d21bc, 0x38387048, 0xf5f5f104, + 0xbcbc63df, 0xb6b677c1, 0xdadaaf75, 0x21214263, + 0x10102030, 0xffffe51a, 0xf3f3fd0e, 0xd2d2bf6d, + 0xcdcd814c, 0xc0c1814, 0x13132635, 0xececc32f, + 0x5f5fbee1, 0x979735a2, 0x444488cc, 0x17172e39, + 0xc4c49357, 0xa7a755f2, 0x7e7efc82, 0x3d3d7a47, + 0x6464c8ac, 0x5d5dbae7, 0x1919322b, 0x7373e695, + 0x6060c0a0, 0x81811998, 0x4f4f9ed1, 0xdcdca37f, + 0x22224466, 0x2a2a547e, 0x90903bab, 0x88880b83, + 0x46468cca, 0xeeeec729, 0xb8b86bd3, 0x1414283c, + 0xdedea779, 0x5e5ebce2, 0xb0b161d, 0xdbdbad76, + 0xe0e0db3b, 0x32326456, 0x3a3a744e, 0xa0a141e, + 0x494992db, 0x6060c0a, 0x2424486c, 0x5c5cb8e4, + 0xc2c29f5d, 0xd3d3bd6e, 0xacac43ef, 0x6262c4a6, + 0x919139a8, 0x959531a4, 0xe4e4d337, 0x7979f28b, + 0xe7e7d532, 0xc8c88b43, 0x37376e59, 0x6d6ddab7, + 0x8d8d018c, 0xd5d5b164, 0x4e4e9cd2, 0xa9a949e0, + 0x6c6cd8b4, 0x5656acfa, 0xf4f4f307, 0xeaeacf25, + 0x6565caaf, 0x7a7af48e, 0xaeae47e9, 0x8081018, + 0xbaba6fd5, 0x7878f088, 0x25254a6f, 0x2e2e5c72, + 0x1c1c3824, 0xa6a657f1, 0xb4b473c7, 0xc6c69751, + 0xe8e8cb23, 0xdddda17c, 0x7474e89c, 0x1f1f3e21, + 0x4b4b96dd, 0xbdbd61dc, 0x8b8b0d86, 0x8a8a0f85, + 0x7070e090, 0x3e3e7c42, 0xb5b571c4, 0x6666ccaa, + 0x484890d8, 0x3030605, 0xf6f6f701, 0xe0e1c12, + 0x6161c2a3, 0x35356a5f, 0x5757aef9, 0xb9b969d0, + 0x86861791, 0xc1c19958, 0x1d1d3a27, 0x9e9e27b9, + 0xe1e1d938, 0xf8f8eb13, 0x98982bb3, 0x11112233, + 0x6969d2bb, 0xd9d9a970, 0x8e8e0789, 0x949433a7, + 0x9b9b2db6, 0x1e1e3c22, 0x87871592, 0xe9e9c920, + 0xcece8749, 0x5555aaff, 0x28285078, 0xdfdfa57a, + 0x8c8c038f, 0xa1a159f8, 0x89890980, 0xd0d1a17, + 0xbfbf65da, 0xe6e6d731, 0x424284c6, 0x6868d0b8, + 0x414182c3, 0x999929b0, 0x2d2d5a77, 0xf0f1e11, + 0xb0b07bcb, 0x5454a8fc, 0xbbbb6dd6, 0x16162c3a, +}; +/* clang-format on */ + +/* clang-format off */ +static const uint32_t T2[256] = { + 0x63c6a563, 0x7cf8847c, 0x77ee9977, 0x7bf68d7b, + 0xf2ff0df2, 0x6bd6bd6b, 0x6fdeb16f, 0xc59154c5, + 0x30605030, 0x1020301, 0x67cea967, 0x2b567d2b, + 0xfee719fe, 0xd7b562d7, 0xab4de6ab, 0x76ec9a76, + 0xca8f45ca, 0x821f9d82, 0xc98940c9, 0x7dfa877d, + 0xfaef15fa, 0x59b2eb59, 0x478ec947, 0xf0fb0bf0, + 0xad41ecad, 0xd4b367d4, 0xa25ffda2, 0xaf45eaaf, + 0x9c23bf9c, 0xa453f7a4, 0x72e49672, 0xc09b5bc0, + 0xb775c2b7, 0xfde11cfd, 0x933dae93, 0x264c6a26, + 0x366c5a36, 0x3f7e413f, 0xf7f502f7, 0xcc834fcc, + 0x34685c34, 0xa551f4a5, 0xe5d134e5, 0xf1f908f1, + 0x71e29371, 0xd8ab73d8, 0x31625331, 0x152a3f15, + 0x4080c04, 0xc79552c7, 0x23466523, 0xc39d5ec3, + 0x18302818, 0x9637a196, 0x50a0f05, 0x9a2fb59a, + 0x70e0907, 0x12243612, 0x801b9b80, 0xe2df3de2, + 0xebcd26eb, 0x274e6927, 0xb27fcdb2, 0x75ea9f75, + 0x9121b09, 0x831d9e83, 0x2c58742c, 0x1a342e1a, + 0x1b362d1b, 0x6edcb26e, 0x5ab4ee5a, 0xa05bfba0, + 0x52a4f652, 0x3b764d3b, 0xd6b761d6, 0xb37dceb3, + 0x29527b29, 0xe3dd3ee3, 0x2f5e712f, 0x84139784, + 0x53a6f553, 0xd1b968d1, 0x0, 0xedc12ced, + 0x20406020, 0xfce31ffc, 0xb179c8b1, 0x5bb6ed5b, + 0x6ad4be6a, 0xcb8d46cb, 0xbe67d9be, 0x39724b39, + 0x4a94de4a, 0x4c98d44c, 0x58b0e858, 0xcf854acf, + 0xd0bb6bd0, 0xefc52aef, 0xaa4fe5aa, 0xfbed16fb, + 0x4386c543, 0x4d9ad74d, 0x33665533, 0x85119485, + 0x458acf45, 0xf9e910f9, 0x2040602, 0x7ffe817f, + 0x50a0f050, 0x3c78443c, 0x9f25ba9f, 0xa84be3a8, + 0x51a2f351, 0xa35dfea3, 0x4080c040, 0x8f058a8f, + 0x923fad92, 0x9d21bc9d, 0x38704838, 0xf5f104f5, + 0xbc63dfbc, 0xb677c1b6, 0xdaaf75da, 0x21426321, + 0x10203010, 0xffe51aff, 0xf3fd0ef3, 0xd2bf6dd2, + 0xcd814ccd, 0xc18140c, 0x13263513, 0xecc32fec, + 0x5fbee15f, 0x9735a297, 0x4488cc44, 0x172e3917, + 0xc49357c4, 0xa755f2a7, 0x7efc827e, 0x3d7a473d, + 0x64c8ac64, 0x5dbae75d, 0x19322b19, 0x73e69573, + 0x60c0a060, 0x81199881, 0x4f9ed14f, 0xdca37fdc, + 0x22446622, 0x2a547e2a, 0x903bab90, 0x880b8388, + 0x468cca46, 0xeec729ee, 0xb86bd3b8, 0x14283c14, + 0xdea779de, 0x5ebce25e, 0xb161d0b, 0xdbad76db, + 0xe0db3be0, 0x32645632, 0x3a744e3a, 0xa141e0a, + 0x4992db49, 0x60c0a06, 0x24486c24, 0x5cb8e45c, + 0xc29f5dc2, 0xd3bd6ed3, 0xac43efac, 0x62c4a662, + 0x9139a891, 0x9531a495, 0xe4d337e4, 0x79f28b79, + 0xe7d532e7, 0xc88b43c8, 0x376e5937, 0x6ddab76d, + 0x8d018c8d, 0xd5b164d5, 0x4e9cd24e, 0xa949e0a9, + 0x6cd8b46c, 0x56acfa56, 0xf4f307f4, 0xeacf25ea, + 0x65caaf65, 0x7af48e7a, 0xae47e9ae, 0x8101808, + 0xba6fd5ba, 0x78f08878, 0x254a6f25, 0x2e5c722e, + 0x1c38241c, 0xa657f1a6, 0xb473c7b4, 0xc69751c6, + 0xe8cb23e8, 0xdda17cdd, 0x74e89c74, 0x1f3e211f, + 0x4b96dd4b, 0xbd61dcbd, 0x8b0d868b, 0x8a0f858a, + 0x70e09070, 0x3e7c423e, 0xb571c4b5, 0x66ccaa66, + 0x4890d848, 0x3060503, 0xf6f701f6, 0xe1c120e, + 0x61c2a361, 0x356a5f35, 0x57aef957, 0xb969d0b9, + 0x86179186, 0xc19958c1, 0x1d3a271d, 0x9e27b99e, + 0xe1d938e1, 0xf8eb13f8, 0x982bb398, 0x11223311, + 0x69d2bb69, 0xd9a970d9, 0x8e07898e, 0x9433a794, + 0x9b2db69b, 0x1e3c221e, 0x87159287, 0xe9c920e9, + 0xce8749ce, 0x55aaff55, 0x28507828, 0xdfa57adf, + 0x8c038f8c, 0xa159f8a1, 0x89098089, 0xd1a170d, + 0xbf65dabf, 0xe6d731e6, 0x4284c642, 0x68d0b868, + 0x4182c341, 0x9929b099, 0x2d5a772d, 0xf1e110f, + 0xb07bcbb0, 0x54a8fc54, 0xbb6dd6bb, 0x162c3a16, +}; +/* clang-format on */ + +/* clang-format off */ +static const uint32_t T3[256] = { + 0xc6a56363, 0xf8847c7c, 0xee997777, 0xf68d7b7b, + 0xff0df2f2, 0xd6bd6b6b, 0xdeb16f6f, 0x9154c5c5, + 0x60503030, 0x2030101, 0xcea96767, 0x567d2b2b, + 0xe719fefe, 0xb562d7d7, 0x4de6abab, 0xec9a7676, + 0x8f45caca, 0x1f9d8282, 0x8940c9c9, 0xfa877d7d, + 0xef15fafa, 0xb2eb5959, 0x8ec94747, 0xfb0bf0f0, + 0x41ecadad, 0xb367d4d4, 0x5ffda2a2, 0x45eaafaf, + 0x23bf9c9c, 0x53f7a4a4, 0xe4967272, 0x9b5bc0c0, + 0x75c2b7b7, 0xe11cfdfd, 0x3dae9393, 0x4c6a2626, + 0x6c5a3636, 0x7e413f3f, 0xf502f7f7, 0x834fcccc, + 0x685c3434, 0x51f4a5a5, 0xd134e5e5, 0xf908f1f1, + 0xe2937171, 0xab73d8d8, 0x62533131, 0x2a3f1515, + 0x80c0404, 0x9552c7c7, 0x46652323, 0x9d5ec3c3, + 0x30281818, 0x37a19696, 0xa0f0505, 0x2fb59a9a, + 0xe090707, 0x24361212, 0x1b9b8080, 0xdf3de2e2, + 0xcd26ebeb, 0x4e692727, 0x7fcdb2b2, 0xea9f7575, + 0x121b0909, 0x1d9e8383, 0x58742c2c, 0x342e1a1a, + 0x362d1b1b, 0xdcb26e6e, 0xb4ee5a5a, 0x5bfba0a0, + 0xa4f65252, 0x764d3b3b, 0xb761d6d6, 0x7dceb3b3, + 0x527b2929, 0xdd3ee3e3, 0x5e712f2f, 0x13978484, + 0xa6f55353, 0xb968d1d1, 0x0, 0xc12ceded, + 0x40602020, 0xe31ffcfc, 0x79c8b1b1, 0xb6ed5b5b, + 0xd4be6a6a, 0x8d46cbcb, 0x67d9bebe, 0x724b3939, + 0x94de4a4a, 0x98d44c4c, 0xb0e85858, 0x854acfcf, + 0xbb6bd0d0, 0xc52aefef, 0x4fe5aaaa, 0xed16fbfb, + 0x86c54343, 0x9ad74d4d, 0x66553333, 0x11948585, + 0x8acf4545, 0xe910f9f9, 0x4060202, 0xfe817f7f, + 0xa0f05050, 0x78443c3c, 0x25ba9f9f, 0x4be3a8a8, + 0xa2f35151, 0x5dfea3a3, 0x80c04040, 0x58a8f8f, + 0x3fad9292, 0x21bc9d9d, 0x70483838, 0xf104f5f5, + 0x63dfbcbc, 0x77c1b6b6, 0xaf75dada, 0x42632121, + 0x20301010, 0xe51affff, 0xfd0ef3f3, 0xbf6dd2d2, + 0x814ccdcd, 0x18140c0c, 0x26351313, 0xc32fecec, + 0xbee15f5f, 0x35a29797, 0x88cc4444, 0x2e391717, + 0x9357c4c4, 0x55f2a7a7, 0xfc827e7e, 0x7a473d3d, + 0xc8ac6464, 0xbae75d5d, 0x322b1919, 0xe6957373, + 0xc0a06060, 0x19988181, 0x9ed14f4f, 0xa37fdcdc, + 0x44662222, 0x547e2a2a, 0x3bab9090, 0xb838888, + 0x8cca4646, 0xc729eeee, 0x6bd3b8b8, 0x283c1414, + 0xa779dede, 0xbce25e5e, 0x161d0b0b, 0xad76dbdb, + 0xdb3be0e0, 0x64563232, 0x744e3a3a, 0x141e0a0a, + 0x92db4949, 0xc0a0606, 0x486c2424, 0xb8e45c5c, + 0x9f5dc2c2, 0xbd6ed3d3, 0x43efacac, 0xc4a66262, + 0x39a89191, 0x31a49595, 0xd337e4e4, 0xf28b7979, + 0xd532e7e7, 0x8b43c8c8, 0x6e593737, 0xdab76d6d, + 0x18c8d8d, 0xb164d5d5, 0x9cd24e4e, 0x49e0a9a9, + 0xd8b46c6c, 0xacfa5656, 0xf307f4f4, 0xcf25eaea, + 0xcaaf6565, 0xf48e7a7a, 0x47e9aeae, 0x10180808, + 0x6fd5baba, 0xf0887878, 0x4a6f2525, 0x5c722e2e, + 0x38241c1c, 0x57f1a6a6, 0x73c7b4b4, 0x9751c6c6, + 0xcb23e8e8, 0xa17cdddd, 0xe89c7474, 0x3e211f1f, + 0x96dd4b4b, 0x61dcbdbd, 0xd868b8b, 0xf858a8a, + 0xe0907070, 0x7c423e3e, 0x71c4b5b5, 0xccaa6666, + 0x90d84848, 0x6050303, 0xf701f6f6, 0x1c120e0e, + 0xc2a36161, 0x6a5f3535, 0xaef95757, 0x69d0b9b9, + 0x17918686, 0x9958c1c1, 0x3a271d1d, 0x27b99e9e, + 0xd938e1e1, 0xeb13f8f8, 0x2bb39898, 0x22331111, + 0xd2bb6969, 0xa970d9d9, 0x7898e8e, 0x33a79494, + 0x2db69b9b, 0x3c221e1e, 0x15928787, 0xc920e9e9, + 0x8749cece, 0xaaff5555, 0x50782828, 0xa57adfdf, + 0x38f8c8c, 0x59f8a1a1, 0x9808989, 0x1a170d0d, + 0x65dabfbf, 0xd731e6e6, 0x84c64242, 0xd0b86868, + 0x82c34141, 0x29b09999, 0x5a772d2d, 0x1e110f0f, + 0x7bcbb0b0, 0xa8fc5454, 0x6dd6bbbb, 0x2c3a1616, +}; +/* clang-format on */ + +/* clang-format off */ +static const uint32_t U0[256] = { + 0x50a7f451, 0x5365417e, 0xc3a4171a, 0x965e273a, + 0xcb6bab3b, 0xf1459d1f, 0xab58faac, 0x9303e34b, + 0x55fa3020, 0xf66d76ad, 0x9176cc88, 0x254c02f5, + 0xfcd7e54f, 0xd7cb2ac5, 0x80443526, 0x8fa362b5, + 0x495ab1de, 0x671bba25, 0x980eea45, 0xe1c0fe5d, + 0x2752fc3, 0x12f04c81, 0xa397468d, 0xc6f9d36b, + 0xe75f8f03, 0x959c9215, 0xeb7a6dbf, 0xda595295, + 0x2d83bed4, 0xd3217458, 0x2969e049, 0x44c8c98e, + 0x6a89c275, 0x78798ef4, 0x6b3e5899, 0xdd71b927, + 0xb64fe1be, 0x17ad88f0, 0x66ac20c9, 0xb43ace7d, + 0x184adf63, 0x82311ae5, 0x60335197, 0x457f5362, + 0xe07764b1, 0x84ae6bbb, 0x1ca081fe, 0x942b08f9, + 0x58684870, 0x19fd458f, 0x876cde94, 0xb7f87b52, + 0x23d373ab, 0xe2024b72, 0x578f1fe3, 0x2aab5566, + 0x728ebb2, 0x3c2b52f, 0x9a7bc586, 0xa50837d3, + 0xf2872830, 0xb2a5bf23, 0xba6a0302, 0x5c8216ed, + 0x2b1ccf8a, 0x92b479a7, 0xf0f207f3, 0xa1e2694e, + 0xcdf4da65, 0xd5be0506, 0x1f6234d1, 0x8afea6c4, + 0x9d532e34, 0xa055f3a2, 0x32e18a05, 0x75ebf6a4, + 0x39ec830b, 0xaaef6040, 0x69f715e, 0x51106ebd, + 0xf98a213e, 0x3d06dd96, 0xae053edd, 0x46bde64d, + 0xb58d5491, 0x55dc471, 0x6fd40604, 0xff155060, + 0x24fb9819, 0x97e9bdd6, 0xcc434089, 0x779ed967, + 0xbd42e8b0, 0x888b8907, 0x385b19e7, 0xdbeec879, + 0x470a7ca1, 0xe90f427c, 0xc91e84f8, 0x0, + 0x83868009, 0x48ed2b32, 0xac70111e, 0x4e725a6c, + 0xfbff0efd, 0x5638850f, 0x1ed5ae3d, 0x27392d36, + 0x64d90f0a, 0x21a65c68, 0xd1545b9b, 0x3a2e3624, + 0xb1670a0c, 0xfe75793, 0xd296eeb4, 0x9e919b1b, + 0x4fc5c080, 0xa220dc61, 0x694b775a, 0x161a121c, + 0xaba93e2, 0xe52aa0c0, 0x43e0223c, 0x1d171b12, + 0xb0d090e, 0xadc78bf2, 0xb9a8b62d, 0xc8a91e14, + 0x8519f157, 0x4c0775af, 0xbbdd99ee, 0xfd607fa3, + 0x9f2601f7, 0xbcf5725c, 0xc53b6644, 0x347efb5b, + 0x7629438b, 0xdcc623cb, 0x68fcedb6, 0x63f1e4b8, + 0xcadc31d7, 0x10856342, 0x40229713, 0x2011c684, + 0x7d244a85, 0xf83dbbd2, 0x1132f9ae, 0x6da129c7, + 0x4b2f9e1d, 0xf330b2dc, 0xec52860d, 0xd0e3c177, + 0x6c16b32b, 0x99b970a9, 0xfa489411, 0x2264e947, + 0xc48cfca8, 0x1a3ff0a0, 0xd82c7d56, 0xef903322, + 0xc74e4987, 0xc1d138d9, 0xfea2ca8c, 0x360bd498, + 0xcf81f5a6, 0x28de7aa5, 0x268eb7da, 0xa4bfad3f, + 0xe49d3a2c, 0xd927850, 0x9bcc5f6a, 0x62467e54, + 0xc2138df6, 0xe8b8d890, 0x5ef7392e, 0xf5afc382, + 0xbe805d9f, 0x7c93d069, 0xa92dd56f, 0xb31225cf, + 0x3b99acc8, 0xa77d1810, 0x6e639ce8, 0x7bbb3bdb, + 0x97826cd, 0xf418596e, 0x1b79aec, 0xa89a4f83, + 0x656e95e6, 0x7ee6ffaa, 0x8cfbc21, 0xe6e815ef, + 0xd99be7ba, 0xce366f4a, 0xd4099fea, 0xd67cb029, + 0xafb2a431, 0x31233f2a, 0x3094a5c6, 0xc066a235, + 0x37bc4e74, 0xa6ca82fc, 0xb0d090e0, 0x15d8a733, + 0x4a9804f1, 0xf7daec41, 0xe50cd7f, 0x2ff69117, + 0x8dd64d76, 0x4db0ef43, 0x544daacc, 0xdf0496e4, + 0xe3b5d19e, 0x1b886a4c, 0xb81f2cc1, 0x7f516546, + 0x4ea5e9d, 0x5d358c01, 0x737487fa, 0x2e410bfb, + 0x5a1d67b3, 0x52d2db92, 0x335610e9, 0x1347d66d, + 0x8c61d79a, 0x7a0ca137, 0x8e14f859, 0x893c13eb, + 0xee27a9ce, 0x35c961b7, 0xede51ce1, 0x3cb1477a, + 0x59dfd29c, 0x3f73f255, 0x79ce1418, 0xbf37c773, + 0xeacdf753, 0x5baafd5f, 0x146f3ddf, 0x86db4478, + 0x81f3afca, 0x3ec468b9, 0x2c342438, 0x5f40a3c2, + 0x72c31d16, 0xc25e2bc, 0x8b493c28, 0x41950dff, + 0x7101a839, 0xdeb30c08, 0x9ce4b4d8, 0x90c15664, + 0x6184cb7b, 0x70b632d5, 0x745c6c48, 0x4257b8d0, +}; +/* clang-format on */ + +/* clang-format off */ +static const uint32_t U1[256] = { + 0xa7f45150, 0x65417e53, 0xa4171ac3, 0x5e273a96, + 0x6bab3bcb, 0x459d1ff1, 0x58faacab, 0x3e34b93, + 0xfa302055, 0x6d76adf6, 0x76cc8891, 0x4c02f525, + 0xd7e54ffc, 0xcb2ac5d7, 0x44352680, 0xa362b58f, + 0x5ab1de49, 0x1bba2567, 0xeea4598, 0xc0fe5de1, + 0x752fc302, 0xf04c8112, 0x97468da3, 0xf9d36bc6, + 0x5f8f03e7, 0x9c921595, 0x7a6dbfeb, 0x595295da, + 0x83bed42d, 0x217458d3, 0x69e04929, 0xc8c98e44, + 0x89c2756a, 0x798ef478, 0x3e58996b, 0x71b927dd, + 0x4fe1beb6, 0xad88f017, 0xac20c966, 0x3ace7db4, + 0x4adf6318, 0x311ae582, 0x33519760, 0x7f536245, + 0x7764b1e0, 0xae6bbb84, 0xa081fe1c, 0x2b08f994, + 0x68487058, 0xfd458f19, 0x6cde9487, 0xf87b52b7, + 0xd373ab23, 0x24b72e2, 0x8f1fe357, 0xab55662a, + 0x28ebb207, 0xc2b52f03, 0x7bc5869a, 0x837d3a5, + 0x872830f2, 0xa5bf23b2, 0x6a0302ba, 0x8216ed5c, + 0x1ccf8a2b, 0xb479a792, 0xf207f3f0, 0xe2694ea1, + 0xf4da65cd, 0xbe0506d5, 0x6234d11f, 0xfea6c48a, + 0x532e349d, 0x55f3a2a0, 0xe18a0532, 0xebf6a475, + 0xec830b39, 0xef6040aa, 0x9f715e06, 0x106ebd51, + 0x8a213ef9, 0x6dd963d, 0x53eddae, 0xbde64d46, + 0x8d5491b5, 0x5dc47105, 0xd406046f, 0x155060ff, + 0xfb981924, 0xe9bdd697, 0x434089cc, 0x9ed96777, + 0x42e8b0bd, 0x8b890788, 0x5b19e738, 0xeec879db, + 0xa7ca147, 0xf427ce9, 0x1e84f8c9, 0x0, + 0x86800983, 0xed2b3248, 0x70111eac, 0x725a6c4e, + 0xff0efdfb, 0x38850f56, 0xd5ae3d1e, 0x392d3627, + 0xd90f0a64, 0xa65c6821, 0x545b9bd1, 0x2e36243a, + 0x670a0cb1, 0xe757930f, 0x96eeb4d2, 0x919b1b9e, + 0xc5c0804f, 0x20dc61a2, 0x4b775a69, 0x1a121c16, + 0xba93e20a, 0x2aa0c0e5, 0xe0223c43, 0x171b121d, + 0xd090e0b, 0xc78bf2ad, 0xa8b62db9, 0xa91e14c8, + 0x19f15785, 0x775af4c, 0xdd99eebb, 0x607fa3fd, + 0x2601f79f, 0xf5725cbc, 0x3b6644c5, 0x7efb5b34, + 0x29438b76, 0xc623cbdc, 0xfcedb668, 0xf1e4b863, + 0xdc31d7ca, 0x85634210, 0x22971340, 0x11c68420, + 0x244a857d, 0x3dbbd2f8, 0x32f9ae11, 0xa129c76d, + 0x2f9e1d4b, 0x30b2dcf3, 0x52860dec, 0xe3c177d0, + 0x16b32b6c, 0xb970a999, 0x489411fa, 0x64e94722, + 0x8cfca8c4, 0x3ff0a01a, 0x2c7d56d8, 0x903322ef, + 0x4e4987c7, 0xd138d9c1, 0xa2ca8cfe, 0xbd49836, + 0x81f5a6cf, 0xde7aa528, 0x8eb7da26, 0xbfad3fa4, + 0x9d3a2ce4, 0x9278500d, 0xcc5f6a9b, 0x467e5462, + 0x138df6c2, 0xb8d890e8, 0xf7392e5e, 0xafc382f5, + 0x805d9fbe, 0x93d0697c, 0x2dd56fa9, 0x1225cfb3, + 0x99acc83b, 0x7d1810a7, 0x639ce86e, 0xbb3bdb7b, + 0x7826cd09, 0x18596ef4, 0xb79aec01, 0x9a4f83a8, + 0x6e95e665, 0xe6ffaa7e, 0xcfbc2108, 0xe815efe6, + 0x9be7bad9, 0x366f4ace, 0x99fead4, 0x7cb029d6, + 0xb2a431af, 0x233f2a31, 0x94a5c630, 0x66a235c0, + 0xbc4e7437, 0xca82fca6, 0xd090e0b0, 0xd8a73315, + 0x9804f14a, 0xdaec41f7, 0x50cd7f0e, 0xf691172f, + 0xd64d768d, 0xb0ef434d, 0x4daacc54, 0x496e4df, + 0xb5d19ee3, 0x886a4c1b, 0x1f2cc1b8, 0x5165467f, + 0xea5e9d04, 0x358c015d, 0x7487fa73, 0x410bfb2e, + 0x1d67b35a, 0xd2db9252, 0x5610e933, 0x47d66d13, + 0x61d79a8c, 0xca1377a, 0x14f8598e, 0x3c13eb89, + 0x27a9ceee, 0xc961b735, 0xe51ce1ed, 0xb1477a3c, + 0xdfd29c59, 0x73f2553f, 0xce141879, 0x37c773bf, + 0xcdf753ea, 0xaafd5f5b, 0x6f3ddf14, 0xdb447886, + 0xf3afca81, 0xc468b93e, 0x3424382c, 0x40a3c25f, + 0xc31d1672, 0x25e2bc0c, 0x493c288b, 0x950dff41, + 0x1a83971, 0xb30c08de, 0xe4b4d89c, 0xc1566490, + 0x84cb7b61, 0xb632d570, 0x5c6c4874, 0x57b8d042, +}; +/* clang-format on */ + +/* clang-format off */ +static const uint32_t U2[256] = { + 0xf45150a7, 0x417e5365, 0x171ac3a4, 0x273a965e, + 0xab3bcb6b, 0x9d1ff145, 0xfaacab58, 0xe34b9303, + 0x302055fa, 0x76adf66d, 0xcc889176, 0x2f5254c, + 0xe54ffcd7, 0x2ac5d7cb, 0x35268044, 0x62b58fa3, + 0xb1de495a, 0xba25671b, 0xea45980e, 0xfe5de1c0, + 0x2fc30275, 0x4c8112f0, 0x468da397, 0xd36bc6f9, + 0x8f03e75f, 0x9215959c, 0x6dbfeb7a, 0x5295da59, + 0xbed42d83, 0x7458d321, 0xe0492969, 0xc98e44c8, + 0xc2756a89, 0x8ef47879, 0x58996b3e, 0xb927dd71, + 0xe1beb64f, 0x88f017ad, 0x20c966ac, 0xce7db43a, + 0xdf63184a, 0x1ae58231, 0x51976033, 0x5362457f, + 0x64b1e077, 0x6bbb84ae, 0x81fe1ca0, 0x8f9942b, + 0x48705868, 0x458f19fd, 0xde94876c, 0x7b52b7f8, + 0x73ab23d3, 0x4b72e202, 0x1fe3578f, 0x55662aab, + 0xebb20728, 0xb52f03c2, 0xc5869a7b, 0x37d3a508, + 0x2830f287, 0xbf23b2a5, 0x302ba6a, 0x16ed5c82, + 0xcf8a2b1c, 0x79a792b4, 0x7f3f0f2, 0x694ea1e2, + 0xda65cdf4, 0x506d5be, 0x34d11f62, 0xa6c48afe, + 0x2e349d53, 0xf3a2a055, 0x8a0532e1, 0xf6a475eb, + 0x830b39ec, 0x6040aaef, 0x715e069f, 0x6ebd5110, + 0x213ef98a, 0xdd963d06, 0x3eddae05, 0xe64d46bd, + 0x5491b58d, 0xc471055d, 0x6046fd4, 0x5060ff15, + 0x981924fb, 0xbdd697e9, 0x4089cc43, 0xd967779e, + 0xe8b0bd42, 0x8907888b, 0x19e7385b, 0xc879dbee, + 0x7ca1470a, 0x427ce90f, 0x84f8c91e, 0x0, + 0x80098386, 0x2b3248ed, 0x111eac70, 0x5a6c4e72, + 0xefdfbff, 0x850f5638, 0xae3d1ed5, 0x2d362739, + 0xf0a64d9, 0x5c6821a6, 0x5b9bd154, 0x36243a2e, + 0xa0cb167, 0x57930fe7, 0xeeb4d296, 0x9b1b9e91, + 0xc0804fc5, 0xdc61a220, 0x775a694b, 0x121c161a, + 0x93e20aba, 0xa0c0e52a, 0x223c43e0, 0x1b121d17, + 0x90e0b0d, 0x8bf2adc7, 0xb62db9a8, 0x1e14c8a9, + 0xf1578519, 0x75af4c07, 0x99eebbdd, 0x7fa3fd60, + 0x1f79f26, 0x725cbcf5, 0x6644c53b, 0xfb5b347e, + 0x438b7629, 0x23cbdcc6, 0xedb668fc, 0xe4b863f1, + 0x31d7cadc, 0x63421085, 0x97134022, 0xc6842011, + 0x4a857d24, 0xbbd2f83d, 0xf9ae1132, 0x29c76da1, + 0x9e1d4b2f, 0xb2dcf330, 0x860dec52, 0xc177d0e3, + 0xb32b6c16, 0x70a999b9, 0x9411fa48, 0xe9472264, + 0xfca8c48c, 0xf0a01a3f, 0x7d56d82c, 0x3322ef90, + 0x4987c74e, 0x38d9c1d1, 0xca8cfea2, 0xd498360b, + 0xf5a6cf81, 0x7aa528de, 0xb7da268e, 0xad3fa4bf, + 0x3a2ce49d, 0x78500d92, 0x5f6a9bcc, 0x7e546246, + 0x8df6c213, 0xd890e8b8, 0x392e5ef7, 0xc382f5af, + 0x5d9fbe80, 0xd0697c93, 0xd56fa92d, 0x25cfb312, + 0xacc83b99, 0x1810a77d, 0x9ce86e63, 0x3bdb7bbb, + 0x26cd0978, 0x596ef418, 0x9aec01b7, 0x4f83a89a, + 0x95e6656e, 0xffaa7ee6, 0xbc2108cf, 0x15efe6e8, + 0xe7bad99b, 0x6f4ace36, 0x9fead409, 0xb029d67c, + 0xa431afb2, 0x3f2a3123, 0xa5c63094, 0xa235c066, + 0x4e7437bc, 0x82fca6ca, 0x90e0b0d0, 0xa73315d8, + 0x4f14a98, 0xec41f7da, 0xcd7f0e50, 0x91172ff6, + 0x4d768dd6, 0xef434db0, 0xaacc544d, 0x96e4df04, + 0xd19ee3b5, 0x6a4c1b88, 0x2cc1b81f, 0x65467f51, + 0x5e9d04ea, 0x8c015d35, 0x87fa7374, 0xbfb2e41, + 0x67b35a1d, 0xdb9252d2, 0x10e93356, 0xd66d1347, + 0xd79a8c61, 0xa1377a0c, 0xf8598e14, 0x13eb893c, + 0xa9ceee27, 0x61b735c9, 0x1ce1ede5, 0x477a3cb1, + 0xd29c59df, 0xf2553f73, 0x141879ce, 0xc773bf37, + 0xf753eacd, 0xfd5f5baa, 0x3ddf146f, 0x447886db, + 0xafca81f3, 0x68b93ec4, 0x24382c34, 0xa3c25f40, + 0x1d1672c3, 0xe2bc0c25, 0x3c288b49, 0xdff4195, + 0xa8397101, 0xc08deb3, 0xb4d89ce4, 0x566490c1, + 0xcb7b6184, 0x32d570b6, 0x6c48745c, 0xb8d04257, +}; +/* clang-format on */ + +/* clang-format off */ +static const uint32_t U3[256] = { + 0x5150a7f4, 0x7e536541, 0x1ac3a417, 0x3a965e27, + 0x3bcb6bab, 0x1ff1459d, 0xacab58fa, 0x4b9303e3, + 0x2055fa30, 0xadf66d76, 0x889176cc, 0xf5254c02, + 0x4ffcd7e5, 0xc5d7cb2a, 0x26804435, 0xb58fa362, + 0xde495ab1, 0x25671bba, 0x45980eea, 0x5de1c0fe, + 0xc302752f, 0x8112f04c, 0x8da39746, 0x6bc6f9d3, + 0x3e75f8f, 0x15959c92, 0xbfeb7a6d, 0x95da5952, + 0xd42d83be, 0x58d32174, 0x492969e0, 0x8e44c8c9, + 0x756a89c2, 0xf478798e, 0x996b3e58, 0x27dd71b9, + 0xbeb64fe1, 0xf017ad88, 0xc966ac20, 0x7db43ace, + 0x63184adf, 0xe582311a, 0x97603351, 0x62457f53, + 0xb1e07764, 0xbb84ae6b, 0xfe1ca081, 0xf9942b08, + 0x70586848, 0x8f19fd45, 0x94876cde, 0x52b7f87b, + 0xab23d373, 0x72e2024b, 0xe3578f1f, 0x662aab55, + 0xb20728eb, 0x2f03c2b5, 0x869a7bc5, 0xd3a50837, + 0x30f28728, 0x23b2a5bf, 0x2ba6a03, 0xed5c8216, + 0x8a2b1ccf, 0xa792b479, 0xf3f0f207, 0x4ea1e269, + 0x65cdf4da, 0x6d5be05, 0xd11f6234, 0xc48afea6, + 0x349d532e, 0xa2a055f3, 0x532e18a, 0xa475ebf6, + 0xb39ec83, 0x40aaef60, 0x5e069f71, 0xbd51106e, + 0x3ef98a21, 0x963d06dd, 0xddae053e, 0x4d46bde6, + 0x91b58d54, 0x71055dc4, 0x46fd406, 0x60ff1550, + 0x1924fb98, 0xd697e9bd, 0x89cc4340, 0x67779ed9, + 0xb0bd42e8, 0x7888b89, 0xe7385b19, 0x79dbeec8, + 0xa1470a7c, 0x7ce90f42, 0xf8c91e84, 0x0, + 0x9838680, 0x3248ed2b, 0x1eac7011, 0x6c4e725a, + 0xfdfbff0e, 0xf563885, 0x3d1ed5ae, 0x3627392d, + 0xa64d90f, 0x6821a65c, 0x9bd1545b, 0x243a2e36, + 0xcb1670a, 0x930fe757, 0xb4d296ee, 0x1b9e919b, + 0x804fc5c0, 0x61a220dc, 0x5a694b77, 0x1c161a12, + 0xe20aba93, 0xc0e52aa0, 0x3c43e022, 0x121d171b, + 0xe0b0d09, 0xf2adc78b, 0x2db9a8b6, 0x14c8a91e, + 0x578519f1, 0xaf4c0775, 0xeebbdd99, 0xa3fd607f, + 0xf79f2601, 0x5cbcf572, 0x44c53b66, 0x5b347efb, + 0x8b762943, 0xcbdcc623, 0xb668fced, 0xb863f1e4, + 0xd7cadc31, 0x42108563, 0x13402297, 0x842011c6, + 0x857d244a, 0xd2f83dbb, 0xae1132f9, 0xc76da129, + 0x1d4b2f9e, 0xdcf330b2, 0xdec5286, 0x77d0e3c1, + 0x2b6c16b3, 0xa999b970, 0x11fa4894, 0x472264e9, + 0xa8c48cfc, 0xa01a3ff0, 0x56d82c7d, 0x22ef9033, + 0x87c74e49, 0xd9c1d138, 0x8cfea2ca, 0x98360bd4, + 0xa6cf81f5, 0xa528de7a, 0xda268eb7, 0x3fa4bfad, + 0x2ce49d3a, 0x500d9278, 0x6a9bcc5f, 0x5462467e, + 0xf6c2138d, 0x90e8b8d8, 0x2e5ef739, 0x82f5afc3, + 0x9fbe805d, 0x697c93d0, 0x6fa92dd5, 0xcfb31225, + 0xc83b99ac, 0x10a77d18, 0xe86e639c, 0xdb7bbb3b, + 0xcd097826, 0x6ef41859, 0xec01b79a, 0x83a89a4f, + 0xe6656e95, 0xaa7ee6ff, 0x2108cfbc, 0xefe6e815, + 0xbad99be7, 0x4ace366f, 0xead4099f, 0x29d67cb0, + 0x31afb2a4, 0x2a31233f, 0xc63094a5, 0x35c066a2, + 0x7437bc4e, 0xfca6ca82, 0xe0b0d090, 0x3315d8a7, + 0xf14a9804, 0x41f7daec, 0x7f0e50cd, 0x172ff691, + 0x768dd64d, 0x434db0ef, 0xcc544daa, 0xe4df0496, + 0x9ee3b5d1, 0x4c1b886a, 0xc1b81f2c, 0x467f5165, + 0x9d04ea5e, 0x15d358c, 0xfa737487, 0xfb2e410b, + 0xb35a1d67, 0x9252d2db, 0xe9335610, 0x6d1347d6, + 0x9a8c61d7, 0x377a0ca1, 0x598e14f8, 0xeb893c13, + 0xceee27a9, 0xb735c961, 0xe1ede51c, 0x7a3cb147, + 0x9c59dfd2, 0x553f73f2, 0x1879ce14, 0x73bf37c7, + 0x53eacdf7, 0x5f5baafd, 0xdf146f3d, 0x7886db44, + 0xca81f3af, 0xb93ec468, 0x382c3424, 0xc25f40a3, + 0x1672c31d, 0xbc0c25e2, 0x288b493c, 0xff41950d, + 0x397101a8, 0x8deb30c, 0xd89ce4b4, 0x6490c156, + 0x7b6184cb, 0xd570b632, 0x48745c6c, 0xd04257b8, +}; +/* clang-format on */ + +#else /* assume big endian */ +/* clang-format off */ +static const uint32_t T0[256] = { + 0xc66363a5, 0xf87c7c84, 0xee777799, 0xf67b7b8d, + 0xfff2f20d, 0xd66b6bbd, 0xde6f6fb1, 0x91c5c554, + 0x60303050, 0x2010103, 0xce6767a9, 0x562b2b7d, + 0xe7fefe19, 0xb5d7d762, 0x4dababe6, 0xec76769a, + 0x8fcaca45, 0x1f82829d, 0x89c9c940, 0xfa7d7d87, + 0xeffafa15, 0xb25959eb, 0x8e4747c9, 0xfbf0f00b, + 0x41adadec, 0xb3d4d467, 0x5fa2a2fd, 0x45afafea, + 0x239c9cbf, 0x53a4a4f7, 0xe4727296, 0x9bc0c05b, + 0x75b7b7c2, 0xe1fdfd1c, 0x3d9393ae, 0x4c26266a, + 0x6c36365a, 0x7e3f3f41, 0xf5f7f702, 0x83cccc4f, + 0x6834345c, 0x51a5a5f4, 0xd1e5e534, 0xf9f1f108, + 0xe2717193, 0xabd8d873, 0x62313153, 0x2a15153f, + 0x804040c, 0x95c7c752, 0x46232365, 0x9dc3c35e, + 0x30181828, 0x379696a1, 0xa05050f, 0x2f9a9ab5, + 0xe070709, 0x24121236, 0x1b80809b, 0xdfe2e23d, + 0xcdebeb26, 0x4e272769, 0x7fb2b2cd, 0xea75759f, + 0x1209091b, 0x1d83839e, 0x582c2c74, 0x341a1a2e, + 0x361b1b2d, 0xdc6e6eb2, 0xb45a5aee, 0x5ba0a0fb, + 0xa45252f6, 0x763b3b4d, 0xb7d6d661, 0x7db3b3ce, + 0x5229297b, 0xdde3e33e, 0x5e2f2f71, 0x13848497, + 0xa65353f5, 0xb9d1d168, 0x0, 0xc1eded2c, + 0x40202060, 0xe3fcfc1f, 0x79b1b1c8, 0xb65b5bed, + 0xd46a6abe, 0x8dcbcb46, 0x67bebed9, 0x7239394b, + 0x944a4ade, 0x984c4cd4, 0xb05858e8, 0x85cfcf4a, + 0xbbd0d06b, 0xc5efef2a, 0x4faaaae5, 0xedfbfb16, + 0x864343c5, 0x9a4d4dd7, 0x66333355, 0x11858594, + 0x8a4545cf, 0xe9f9f910, 0x4020206, 0xfe7f7f81, + 0xa05050f0, 0x783c3c44, 0x259f9fba, 0x4ba8a8e3, + 0xa25151f3, 0x5da3a3fe, 0x804040c0, 0x58f8f8a, + 0x3f9292ad, 0x219d9dbc, 0x70383848, 0xf1f5f504, + 0x63bcbcdf, 0x77b6b6c1, 0xafdada75, 0x42212163, + 0x20101030, 0xe5ffff1a, 0xfdf3f30e, 0xbfd2d26d, + 0x81cdcd4c, 0x180c0c14, 0x26131335, 0xc3ecec2f, + 0xbe5f5fe1, 0x359797a2, 0x884444cc, 0x2e171739, + 0x93c4c457, 0x55a7a7f2, 0xfc7e7e82, 0x7a3d3d47, + 0xc86464ac, 0xba5d5de7, 0x3219192b, 0xe6737395, + 0xc06060a0, 0x19818198, 0x9e4f4fd1, 0xa3dcdc7f, + 0x44222266, 0x542a2a7e, 0x3b9090ab, 0xb888883, + 0x8c4646ca, 0xc7eeee29, 0x6bb8b8d3, 0x2814143c, + 0xa7dede79, 0xbc5e5ee2, 0x160b0b1d, 0xaddbdb76, + 0xdbe0e03b, 0x64323256, 0x743a3a4e, 0x140a0a1e, + 0x924949db, 0xc06060a, 0x4824246c, 0xb85c5ce4, + 0x9fc2c25d, 0xbdd3d36e, 0x43acacef, 0xc46262a6, + 0x399191a8, 0x319595a4, 0xd3e4e437, 0xf279798b, + 0xd5e7e732, 0x8bc8c843, 0x6e373759, 0xda6d6db7, + 0x18d8d8c, 0xb1d5d564, 0x9c4e4ed2, 0x49a9a9e0, + 0xd86c6cb4, 0xac5656fa, 0xf3f4f407, 0xcfeaea25, + 0xca6565af, 0xf47a7a8e, 0x47aeaee9, 0x10080818, + 0x6fbabad5, 0xf0787888, 0x4a25256f, 0x5c2e2e72, + 0x381c1c24, 0x57a6a6f1, 0x73b4b4c7, 0x97c6c651, + 0xcbe8e823, 0xa1dddd7c, 0xe874749c, 0x3e1f1f21, + 0x964b4bdd, 0x61bdbddc, 0xd8b8b86, 0xf8a8a85, + 0xe0707090, 0x7c3e3e42, 0x71b5b5c4, 0xcc6666aa, + 0x904848d8, 0x6030305, 0xf7f6f601, 0x1c0e0e12, + 0xc26161a3, 0x6a35355f, 0xae5757f9, 0x69b9b9d0, + 0x17868691, 0x99c1c158, 0x3a1d1d27, 0x279e9eb9, + 0xd9e1e138, 0xebf8f813, 0x2b9898b3, 0x22111133, + 0xd26969bb, 0xa9d9d970, 0x78e8e89, 0x339494a7, + 0x2d9b9bb6, 0x3c1e1e22, 0x15878792, 0xc9e9e920, + 0x87cece49, 0xaa5555ff, 0x50282878, 0xa5dfdf7a, + 0x38c8c8f, 0x59a1a1f8, 0x9898980, 0x1a0d0d17, + 0x65bfbfda, 0xd7e6e631, 0x844242c6, 0xd06868b8, + 0x824141c3, 0x299999b0, 0x5a2d2d77, 0x1e0f0f11, + 0x7bb0b0cb, 0xa85454fc, 0x6dbbbbd6, 0x2c16163a, +}; +/* clang-format on */ + +/* clang-format off */ +static const uint32_t T1[256] = { + 0xa5c66363, 0x84f87c7c, 0x99ee7777, 0x8df67b7b, + 0xdfff2f2, 0xbdd66b6b, 0xb1de6f6f, 0x5491c5c5, + 0x50603030, 0x3020101, 0xa9ce6767, 0x7d562b2b, + 0x19e7fefe, 0x62b5d7d7, 0xe64dabab, 0x9aec7676, + 0x458fcaca, 0x9d1f8282, 0x4089c9c9, 0x87fa7d7d, + 0x15effafa, 0xebb25959, 0xc98e4747, 0xbfbf0f0, + 0xec41adad, 0x67b3d4d4, 0xfd5fa2a2, 0xea45afaf, + 0xbf239c9c, 0xf753a4a4, 0x96e47272, 0x5b9bc0c0, + 0xc275b7b7, 0x1ce1fdfd, 0xae3d9393, 0x6a4c2626, + 0x5a6c3636, 0x417e3f3f, 0x2f5f7f7, 0x4f83cccc, + 0x5c683434, 0xf451a5a5, 0x34d1e5e5, 0x8f9f1f1, + 0x93e27171, 0x73abd8d8, 0x53623131, 0x3f2a1515, + 0xc080404, 0x5295c7c7, 0x65462323, 0x5e9dc3c3, + 0x28301818, 0xa1379696, 0xf0a0505, 0xb52f9a9a, + 0x90e0707, 0x36241212, 0x9b1b8080, 0x3ddfe2e2, + 0x26cdebeb, 0x694e2727, 0xcd7fb2b2, 0x9fea7575, + 0x1b120909, 0x9e1d8383, 0x74582c2c, 0x2e341a1a, + 0x2d361b1b, 0xb2dc6e6e, 0xeeb45a5a, 0xfb5ba0a0, + 0xf6a45252, 0x4d763b3b, 0x61b7d6d6, 0xce7db3b3, + 0x7b522929, 0x3edde3e3, 0x715e2f2f, 0x97138484, + 0xf5a65353, 0x68b9d1d1, 0x0, 0x2cc1eded, + 0x60402020, 0x1fe3fcfc, 0xc879b1b1, 0xedb65b5b, + 0xbed46a6a, 0x468dcbcb, 0xd967bebe, 0x4b723939, + 0xde944a4a, 0xd4984c4c, 0xe8b05858, 0x4a85cfcf, + 0x6bbbd0d0, 0x2ac5efef, 0xe54faaaa, 0x16edfbfb, + 0xc5864343, 0xd79a4d4d, 0x55663333, 0x94118585, + 0xcf8a4545, 0x10e9f9f9, 0x6040202, 0x81fe7f7f, + 0xf0a05050, 0x44783c3c, 0xba259f9f, 0xe34ba8a8, + 0xf3a25151, 0xfe5da3a3, 0xc0804040, 0x8a058f8f, + 0xad3f9292, 0xbc219d9d, 0x48703838, 0x4f1f5f5, + 0xdf63bcbc, 0xc177b6b6, 0x75afdada, 0x63422121, + 0x30201010, 0x1ae5ffff, 0xefdf3f3, 0x6dbfd2d2, + 0x4c81cdcd, 0x14180c0c, 0x35261313, 0x2fc3ecec, + 0xe1be5f5f, 0xa2359797, 0xcc884444, 0x392e1717, + 0x5793c4c4, 0xf255a7a7, 0x82fc7e7e, 0x477a3d3d, + 0xacc86464, 0xe7ba5d5d, 0x2b321919, 0x95e67373, + 0xa0c06060, 0x98198181, 0xd19e4f4f, 0x7fa3dcdc, + 0x66442222, 0x7e542a2a, 0xab3b9090, 0x830b8888, + 0xca8c4646, 0x29c7eeee, 0xd36bb8b8, 0x3c281414, + 0x79a7dede, 0xe2bc5e5e, 0x1d160b0b, 0x76addbdb, + 0x3bdbe0e0, 0x56643232, 0x4e743a3a, 0x1e140a0a, + 0xdb924949, 0xa0c0606, 0x6c482424, 0xe4b85c5c, + 0x5d9fc2c2, 0x6ebdd3d3, 0xef43acac, 0xa6c46262, + 0xa8399191, 0xa4319595, 0x37d3e4e4, 0x8bf27979, + 0x32d5e7e7, 0x438bc8c8, 0x596e3737, 0xb7da6d6d, + 0x8c018d8d, 0x64b1d5d5, 0xd29c4e4e, 0xe049a9a9, + 0xb4d86c6c, 0xfaac5656, 0x7f3f4f4, 0x25cfeaea, + 0xafca6565, 0x8ef47a7a, 0xe947aeae, 0x18100808, + 0xd56fbaba, 0x88f07878, 0x6f4a2525, 0x725c2e2e, + 0x24381c1c, 0xf157a6a6, 0xc773b4b4, 0x5197c6c6, + 0x23cbe8e8, 0x7ca1dddd, 0x9ce87474, 0x213e1f1f, + 0xdd964b4b, 0xdc61bdbd, 0x860d8b8b, 0x850f8a8a, + 0x90e07070, 0x427c3e3e, 0xc471b5b5, 0xaacc6666, + 0xd8904848, 0x5060303, 0x1f7f6f6, 0x121c0e0e, + 0xa3c26161, 0x5f6a3535, 0xf9ae5757, 0xd069b9b9, + 0x91178686, 0x5899c1c1, 0x273a1d1d, 0xb9279e9e, + 0x38d9e1e1, 0x13ebf8f8, 0xb32b9898, 0x33221111, + 0xbbd26969, 0x70a9d9d9, 0x89078e8e, 0xa7339494, + 0xb62d9b9b, 0x223c1e1e, 0x92158787, 0x20c9e9e9, + 0x4987cece, 0xffaa5555, 0x78502828, 0x7aa5dfdf, + 0x8f038c8c, 0xf859a1a1, 0x80098989, 0x171a0d0d, + 0xda65bfbf, 0x31d7e6e6, 0xc6844242, 0xb8d06868, + 0xc3824141, 0xb0299999, 0x775a2d2d, 0x111e0f0f, + 0xcb7bb0b0, 0xfca85454, 0xd66dbbbb, 0x3a2c1616, +}; +/* clang-format on */ + +/* clang-format off */ +static const uint32_t T2[256] = { + 0x63a5c663, 0x7c84f87c, 0x7799ee77, 0x7b8df67b, + 0xf20dfff2, 0x6bbdd66b, 0x6fb1de6f, 0xc55491c5, + 0x30506030, 0x1030201, 0x67a9ce67, 0x2b7d562b, + 0xfe19e7fe, 0xd762b5d7, 0xabe64dab, 0x769aec76, + 0xca458fca, 0x829d1f82, 0xc94089c9, 0x7d87fa7d, + 0xfa15effa, 0x59ebb259, 0x47c98e47, 0xf00bfbf0, + 0xadec41ad, 0xd467b3d4, 0xa2fd5fa2, 0xafea45af, + 0x9cbf239c, 0xa4f753a4, 0x7296e472, 0xc05b9bc0, + 0xb7c275b7, 0xfd1ce1fd, 0x93ae3d93, 0x266a4c26, + 0x365a6c36, 0x3f417e3f, 0xf702f5f7, 0xcc4f83cc, + 0x345c6834, 0xa5f451a5, 0xe534d1e5, 0xf108f9f1, + 0x7193e271, 0xd873abd8, 0x31536231, 0x153f2a15, + 0x40c0804, 0xc75295c7, 0x23654623, 0xc35e9dc3, + 0x18283018, 0x96a13796, 0x50f0a05, 0x9ab52f9a, + 0x7090e07, 0x12362412, 0x809b1b80, 0xe23ddfe2, + 0xeb26cdeb, 0x27694e27, 0xb2cd7fb2, 0x759fea75, + 0x91b1209, 0x839e1d83, 0x2c74582c, 0x1a2e341a, + 0x1b2d361b, 0x6eb2dc6e, 0x5aeeb45a, 0xa0fb5ba0, + 0x52f6a452, 0x3b4d763b, 0xd661b7d6, 0xb3ce7db3, + 0x297b5229, 0xe33edde3, 0x2f715e2f, 0x84971384, + 0x53f5a653, 0xd168b9d1, 0x0, 0xed2cc1ed, + 0x20604020, 0xfc1fe3fc, 0xb1c879b1, 0x5bedb65b, + 0x6abed46a, 0xcb468dcb, 0xbed967be, 0x394b7239, + 0x4ade944a, 0x4cd4984c, 0x58e8b058, 0xcf4a85cf, + 0xd06bbbd0, 0xef2ac5ef, 0xaae54faa, 0xfb16edfb, + 0x43c58643, 0x4dd79a4d, 0x33556633, 0x85941185, + 0x45cf8a45, 0xf910e9f9, 0x2060402, 0x7f81fe7f, + 0x50f0a050, 0x3c44783c, 0x9fba259f, 0xa8e34ba8, + 0x51f3a251, 0xa3fe5da3, 0x40c08040, 0x8f8a058f, + 0x92ad3f92, 0x9dbc219d, 0x38487038, 0xf504f1f5, + 0xbcdf63bc, 0xb6c177b6, 0xda75afda, 0x21634221, + 0x10302010, 0xff1ae5ff, 0xf30efdf3, 0xd26dbfd2, + 0xcd4c81cd, 0xc14180c, 0x13352613, 0xec2fc3ec, + 0x5fe1be5f, 0x97a23597, 0x44cc8844, 0x17392e17, + 0xc45793c4, 0xa7f255a7, 0x7e82fc7e, 0x3d477a3d, + 0x64acc864, 0x5de7ba5d, 0x192b3219, 0x7395e673, + 0x60a0c060, 0x81981981, 0x4fd19e4f, 0xdc7fa3dc, + 0x22664422, 0x2a7e542a, 0x90ab3b90, 0x88830b88, + 0x46ca8c46, 0xee29c7ee, 0xb8d36bb8, 0x143c2814, + 0xde79a7de, 0x5ee2bc5e, 0xb1d160b, 0xdb76addb, + 0xe03bdbe0, 0x32566432, 0x3a4e743a, 0xa1e140a, + 0x49db9249, 0x60a0c06, 0x246c4824, 0x5ce4b85c, + 0xc25d9fc2, 0xd36ebdd3, 0xacef43ac, 0x62a6c462, + 0x91a83991, 0x95a43195, 0xe437d3e4, 0x798bf279, + 0xe732d5e7, 0xc8438bc8, 0x37596e37, 0x6db7da6d, + 0x8d8c018d, 0xd564b1d5, 0x4ed29c4e, 0xa9e049a9, + 0x6cb4d86c, 0x56faac56, 0xf407f3f4, 0xea25cfea, + 0x65afca65, 0x7a8ef47a, 0xaee947ae, 0x8181008, + 0xbad56fba, 0x7888f078, 0x256f4a25, 0x2e725c2e, + 0x1c24381c, 0xa6f157a6, 0xb4c773b4, 0xc65197c6, + 0xe823cbe8, 0xdd7ca1dd, 0x749ce874, 0x1f213e1f, + 0x4bdd964b, 0xbddc61bd, 0x8b860d8b, 0x8a850f8a, + 0x7090e070, 0x3e427c3e, 0xb5c471b5, 0x66aacc66, + 0x48d89048, 0x3050603, 0xf601f7f6, 0xe121c0e, + 0x61a3c261, 0x355f6a35, 0x57f9ae57, 0xb9d069b9, + 0x86911786, 0xc15899c1, 0x1d273a1d, 0x9eb9279e, + 0xe138d9e1, 0xf813ebf8, 0x98b32b98, 0x11332211, + 0x69bbd269, 0xd970a9d9, 0x8e89078e, 0x94a73394, + 0x9bb62d9b, 0x1e223c1e, 0x87921587, 0xe920c9e9, + 0xce4987ce, 0x55ffaa55, 0x28785028, 0xdf7aa5df, + 0x8c8f038c, 0xa1f859a1, 0x89800989, 0xd171a0d, + 0xbfda65bf, 0xe631d7e6, 0x42c68442, 0x68b8d068, + 0x41c38241, 0x99b02999, 0x2d775a2d, 0xf111e0f, + 0xb0cb7bb0, 0x54fca854, 0xbbd66dbb, 0x163a2c16, +}; +/* clang-format on */ + +/* clang-format off */ +static const uint32_t T3[256] = { + 0x6363a5c6, 0x7c7c84f8, 0x777799ee, 0x7b7b8df6, + 0xf2f20dff, 0x6b6bbdd6, 0x6f6fb1de, 0xc5c55491, + 0x30305060, 0x1010302, 0x6767a9ce, 0x2b2b7d56, + 0xfefe19e7, 0xd7d762b5, 0xababe64d, 0x76769aec, + 0xcaca458f, 0x82829d1f, 0xc9c94089, 0x7d7d87fa, + 0xfafa15ef, 0x5959ebb2, 0x4747c98e, 0xf0f00bfb, + 0xadadec41, 0xd4d467b3, 0xa2a2fd5f, 0xafafea45, + 0x9c9cbf23, 0xa4a4f753, 0x727296e4, 0xc0c05b9b, + 0xb7b7c275, 0xfdfd1ce1, 0x9393ae3d, 0x26266a4c, + 0x36365a6c, 0x3f3f417e, 0xf7f702f5, 0xcccc4f83, + 0x34345c68, 0xa5a5f451, 0xe5e534d1, 0xf1f108f9, + 0x717193e2, 0xd8d873ab, 0x31315362, 0x15153f2a, + 0x4040c08, 0xc7c75295, 0x23236546, 0xc3c35e9d, + 0x18182830, 0x9696a137, 0x5050f0a, 0x9a9ab52f, + 0x707090e, 0x12123624, 0x80809b1b, 0xe2e23ddf, + 0xebeb26cd, 0x2727694e, 0xb2b2cd7f, 0x75759fea, + 0x9091b12, 0x83839e1d, 0x2c2c7458, 0x1a1a2e34, + 0x1b1b2d36, 0x6e6eb2dc, 0x5a5aeeb4, 0xa0a0fb5b, + 0x5252f6a4, 0x3b3b4d76, 0xd6d661b7, 0xb3b3ce7d, + 0x29297b52, 0xe3e33edd, 0x2f2f715e, 0x84849713, + 0x5353f5a6, 0xd1d168b9, 0x0, 0xeded2cc1, + 0x20206040, 0xfcfc1fe3, 0xb1b1c879, 0x5b5bedb6, + 0x6a6abed4, 0xcbcb468d, 0xbebed967, 0x39394b72, + 0x4a4ade94, 0x4c4cd498, 0x5858e8b0, 0xcfcf4a85, + 0xd0d06bbb, 0xefef2ac5, 0xaaaae54f, 0xfbfb16ed, + 0x4343c586, 0x4d4dd79a, 0x33335566, 0x85859411, + 0x4545cf8a, 0xf9f910e9, 0x2020604, 0x7f7f81fe, + 0x5050f0a0, 0x3c3c4478, 0x9f9fba25, 0xa8a8e34b, + 0x5151f3a2, 0xa3a3fe5d, 0x4040c080, 0x8f8f8a05, + 0x9292ad3f, 0x9d9dbc21, 0x38384870, 0xf5f504f1, + 0xbcbcdf63, 0xb6b6c177, 0xdada75af, 0x21216342, + 0x10103020, 0xffff1ae5, 0xf3f30efd, 0xd2d26dbf, + 0xcdcd4c81, 0xc0c1418, 0x13133526, 0xecec2fc3, + 0x5f5fe1be, 0x9797a235, 0x4444cc88, 0x1717392e, + 0xc4c45793, 0xa7a7f255, 0x7e7e82fc, 0x3d3d477a, + 0x6464acc8, 0x5d5de7ba, 0x19192b32, 0x737395e6, + 0x6060a0c0, 0x81819819, 0x4f4fd19e, 0xdcdc7fa3, + 0x22226644, 0x2a2a7e54, 0x9090ab3b, 0x8888830b, + 0x4646ca8c, 0xeeee29c7, 0xb8b8d36b, 0x14143c28, + 0xdede79a7, 0x5e5ee2bc, 0xb0b1d16, 0xdbdb76ad, + 0xe0e03bdb, 0x32325664, 0x3a3a4e74, 0xa0a1e14, + 0x4949db92, 0x6060a0c, 0x24246c48, 0x5c5ce4b8, + 0xc2c25d9f, 0xd3d36ebd, 0xacacef43, 0x6262a6c4, + 0x9191a839, 0x9595a431, 0xe4e437d3, 0x79798bf2, + 0xe7e732d5, 0xc8c8438b, 0x3737596e, 0x6d6db7da, + 0x8d8d8c01, 0xd5d564b1, 0x4e4ed29c, 0xa9a9e049, + 0x6c6cb4d8, 0x5656faac, 0xf4f407f3, 0xeaea25cf, + 0x6565afca, 0x7a7a8ef4, 0xaeaee947, 0x8081810, + 0xbabad56f, 0x787888f0, 0x25256f4a, 0x2e2e725c, + 0x1c1c2438, 0xa6a6f157, 0xb4b4c773, 0xc6c65197, + 0xe8e823cb, 0xdddd7ca1, 0x74749ce8, 0x1f1f213e, + 0x4b4bdd96, 0xbdbddc61, 0x8b8b860d, 0x8a8a850f, + 0x707090e0, 0x3e3e427c, 0xb5b5c471, 0x6666aacc, + 0x4848d890, 0x3030506, 0xf6f601f7, 0xe0e121c, + 0x6161a3c2, 0x35355f6a, 0x5757f9ae, 0xb9b9d069, + 0x86869117, 0xc1c15899, 0x1d1d273a, 0x9e9eb927, + 0xe1e138d9, 0xf8f813eb, 0x9898b32b, 0x11113322, + 0x6969bbd2, 0xd9d970a9, 0x8e8e8907, 0x9494a733, + 0x9b9bb62d, 0x1e1e223c, 0x87879215, 0xe9e920c9, + 0xcece4987, 0x5555ffaa, 0x28287850, 0xdfdf7aa5, + 0x8c8c8f03, 0xa1a1f859, 0x89898009, 0xd0d171a, + 0xbfbfda65, 0xe6e631d7, 0x4242c684, 0x6868b8d0, + 0x4141c382, 0x9999b029, 0x2d2d775a, 0xf0f111e, + 0xb0b0cb7b, 0x5454fca8, 0xbbbbd66d, 0x16163a2c, +}; +/* clang-format on */ + +/* clang-format off */ +static const uint32_t U0[256] = { + 0x51f4a750, 0x7e416553, 0x1a17a4c3, 0x3a275e96, + 0x3bab6bcb, 0x1f9d45f1, 0xacfa58ab, 0x4be30393, + 0x2030fa55, 0xad766df6, 0x88cc7691, 0xf5024c25, + 0x4fe5d7fc, 0xc52acbd7, 0x26354480, 0xb562a38f, + 0xdeb15a49, 0x25ba1b67, 0x45ea0e98, 0x5dfec0e1, + 0xc32f7502, 0x814cf012, 0x8d4697a3, 0x6bd3f9c6, + 0x38f5fe7, 0x15929c95, 0xbf6d7aeb, 0x955259da, + 0xd4be832d, 0x587421d3, 0x49e06929, 0x8ec9c844, + 0x75c2896a, 0xf48e7978, 0x99583e6b, 0x27b971dd, + 0xbee14fb6, 0xf088ad17, 0xc920ac66, 0x7dce3ab4, + 0x63df4a18, 0xe51a3182, 0x97513360, 0x62537f45, + 0xb16477e0, 0xbb6bae84, 0xfe81a01c, 0xf9082b94, + 0x70486858, 0x8f45fd19, 0x94de6c87, 0x527bf8b7, + 0xab73d323, 0x724b02e2, 0xe31f8f57, 0x6655ab2a, + 0xb2eb2807, 0x2fb5c203, 0x86c57b9a, 0xd33708a5, + 0x302887f2, 0x23bfa5b2, 0x2036aba, 0xed16825c, + 0x8acf1c2b, 0xa779b492, 0xf307f2f0, 0x4e69e2a1, + 0x65daf4cd, 0x605bed5, 0xd134621f, 0xc4a6fe8a, + 0x342e539d, 0xa2f355a0, 0x58ae132, 0xa4f6eb75, + 0xb83ec39, 0x4060efaa, 0x5e719f06, 0xbd6e1051, + 0x3e218af9, 0x96dd063d, 0xdd3e05ae, 0x4de6bd46, + 0x91548db5, 0x71c45d05, 0x406d46f, 0x605015ff, + 0x1998fb24, 0xd6bde997, 0x894043cc, 0x67d99e77, + 0xb0e842bd, 0x7898b88, 0xe7195b38, 0x79c8eedb, + 0xa17c0a47, 0x7c420fe9, 0xf8841ec9, 0x0, + 0x9808683, 0x322bed48, 0x1e1170ac, 0x6c5a724e, + 0xfd0efffb, 0xf853856, 0x3daed51e, 0x362d3927, + 0xa0fd964, 0x685ca621, 0x9b5b54d1, 0x24362e3a, + 0xc0a67b1, 0x9357e70f, 0xb4ee96d2, 0x1b9b919e, + 0x80c0c54f, 0x61dc20a2, 0x5a774b69, 0x1c121a16, + 0xe293ba0a, 0xc0a02ae5, 0x3c22e043, 0x121b171d, + 0xe090d0b, 0xf28bc7ad, 0x2db6a8b9, 0x141ea9c8, + 0x57f11985, 0xaf75074c, 0xee99ddbb, 0xa37f60fd, + 0xf701269f, 0x5c72f5bc, 0x44663bc5, 0x5bfb7e34, + 0x8b432976, 0xcb23c6dc, 0xb6edfc68, 0xb8e4f163, + 0xd731dcca, 0x42638510, 0x13972240, 0x84c61120, + 0x854a247d, 0xd2bb3df8, 0xaef93211, 0xc729a16d, + 0x1d9e2f4b, 0xdcb230f3, 0xd8652ec, 0x77c1e3d0, + 0x2bb3166c, 0xa970b999, 0x119448fa, 0x47e96422, + 0xa8fc8cc4, 0xa0f03f1a, 0x567d2cd8, 0x223390ef, + 0x87494ec7, 0xd938d1c1, 0x8ccaa2fe, 0x98d40b36, + 0xa6f581cf, 0xa57ade28, 0xdab78e26, 0x3fadbfa4, + 0x2c3a9de4, 0x5078920d, 0x6a5fcc9b, 0x547e4662, + 0xf68d13c2, 0x90d8b8e8, 0x2e39f75e, 0x82c3aff5, + 0x9f5d80be, 0x69d0937c, 0x6fd52da9, 0xcf2512b3, + 0xc8ac993b, 0x10187da7, 0xe89c636e, 0xdb3bbb7b, + 0xcd267809, 0x6e5918f4, 0xec9ab701, 0x834f9aa8, + 0xe6956e65, 0xaaffe67e, 0x21bccf08, 0xef15e8e6, + 0xbae79bd9, 0x4a6f36ce, 0xea9f09d4, 0x29b07cd6, + 0x31a4b2af, 0x2a3f2331, 0xc6a59430, 0x35a266c0, + 0x744ebc37, 0xfc82caa6, 0xe090d0b0, 0x33a7d815, + 0xf104984a, 0x41ecdaf7, 0x7fcd500e, 0x1791f62f, + 0x764dd68d, 0x43efb04d, 0xccaa4d54, 0xe49604df, + 0x9ed1b5e3, 0x4c6a881b, 0xc12c1fb8, 0x4665517f, + 0x9d5eea04, 0x18c355d, 0xfa877473, 0xfb0b412e, + 0xb3671d5a, 0x92dbd252, 0xe9105633, 0x6dd64713, + 0x9ad7618c, 0x37a10c7a, 0x59f8148e, 0xeb133c89, + 0xcea927ee, 0xb761c935, 0xe11ce5ed, 0x7a47b13c, + 0x9cd2df59, 0x55f2733f, 0x1814ce79, 0x73c737bf, + 0x53f7cdea, 0x5ffdaa5b, 0xdf3d6f14, 0x7844db86, + 0xcaaff381, 0xb968c43e, 0x3824342c, 0xc2a3405f, + 0x161dc372, 0xbce2250c, 0x283c498b, 0xff0d9541, + 0x39a80171, 0x80cb3de, 0xd8b4e49c, 0x6456c190, + 0x7bcb8461, 0xd532b670, 0x486c5c74, 0xd0b85742 +}; +/* clang-format on */ + +/* clang-format off */ +static const uint32_t U1[256] = { + 0x5051f4a7, 0x537e4165, 0xc31a17a4, 0x963a275e, + 0xcb3bab6b, 0xf11f9d45, 0xabacfa58, 0x934be303, + 0x552030fa, 0xf6ad766d, 0x9188cc76, 0x25f5024c, + 0xfc4fe5d7, 0xd7c52acb, 0x80263544, 0x8fb562a3, + 0x49deb15a, 0x6725ba1b, 0x9845ea0e, 0xe15dfec0, + 0x2c32f75, 0x12814cf0, 0xa38d4697, 0xc66bd3f9, + 0xe7038f5f, 0x9515929c, 0xebbf6d7a, 0xda955259, + 0x2dd4be83, 0xd3587421, 0x2949e069, 0x448ec9c8, + 0x6a75c289, 0x78f48e79, 0x6b99583e, 0xdd27b971, + 0xb6bee14f, 0x17f088ad, 0x66c920ac, 0xb47dce3a, + 0x1863df4a, 0x82e51a31, 0x60975133, 0x4562537f, + 0xe0b16477, 0x84bb6bae, 0x1cfe81a0, 0x94f9082b, + 0x58704868, 0x198f45fd, 0x8794de6c, 0xb7527bf8, + 0x23ab73d3, 0xe2724b02, 0x57e31f8f, 0x2a6655ab, + 0x7b2eb28, 0x32fb5c2, 0x9a86c57b, 0xa5d33708, + 0xf2302887, 0xb223bfa5, 0xba02036a, 0x5ced1682, + 0x2b8acf1c, 0x92a779b4, 0xf0f307f2, 0xa14e69e2, + 0xcd65daf4, 0xd50605be, 0x1fd13462, 0x8ac4a6fe, + 0x9d342e53, 0xa0a2f355, 0x32058ae1, 0x75a4f6eb, + 0x390b83ec, 0xaa4060ef, 0x65e719f, 0x51bd6e10, + 0xf93e218a, 0x3d96dd06, 0xaedd3e05, 0x464de6bd, + 0xb591548d, 0x571c45d, 0x6f0406d4, 0xff605015, + 0x241998fb, 0x97d6bde9, 0xcc894043, 0x7767d99e, + 0xbdb0e842, 0x8807898b, 0x38e7195b, 0xdb79c8ee, + 0x47a17c0a, 0xe97c420f, 0xc9f8841e, 0x0, + 0x83098086, 0x48322bed, 0xac1e1170, 0x4e6c5a72, + 0xfbfd0eff, 0x560f8538, 0x1e3daed5, 0x27362d39, + 0x640a0fd9, 0x21685ca6, 0xd19b5b54, 0x3a24362e, + 0xb10c0a67, 0xf9357e7, 0xd2b4ee96, 0x9e1b9b91, + 0x4f80c0c5, 0xa261dc20, 0x695a774b, 0x161c121a, + 0xae293ba, 0xe5c0a02a, 0x433c22e0, 0x1d121b17, + 0xb0e090d, 0xadf28bc7, 0xb92db6a8, 0xc8141ea9, + 0x8557f119, 0x4caf7507, 0xbbee99dd, 0xfda37f60, + 0x9ff70126, 0xbc5c72f5, 0xc544663b, 0x345bfb7e, + 0x768b4329, 0xdccb23c6, 0x68b6edfc, 0x63b8e4f1, + 0xcad731dc, 0x10426385, 0x40139722, 0x2084c611, + 0x7d854a24, 0xf8d2bb3d, 0x11aef932, 0x6dc729a1, + 0x4b1d9e2f, 0xf3dcb230, 0xec0d8652, 0xd077c1e3, + 0x6c2bb316, 0x99a970b9, 0xfa119448, 0x2247e964, + 0xc4a8fc8c, 0x1aa0f03f, 0xd8567d2c, 0xef223390, + 0xc787494e, 0xc1d938d1, 0xfe8ccaa2, 0x3698d40b, + 0xcfa6f581, 0x28a57ade, 0x26dab78e, 0xa43fadbf, + 0xe42c3a9d, 0xd507892, 0x9b6a5fcc, 0x62547e46, + 0xc2f68d13, 0xe890d8b8, 0x5e2e39f7, 0xf582c3af, + 0xbe9f5d80, 0x7c69d093, 0xa96fd52d, 0xb3cf2512, + 0x3bc8ac99, 0xa710187d, 0x6ee89c63, 0x7bdb3bbb, + 0x9cd2678, 0xf46e5918, 0x1ec9ab7, 0xa8834f9a, + 0x65e6956e, 0x7eaaffe6, 0x821bccf, 0xe6ef15e8, + 0xd9bae79b, 0xce4a6f36, 0xd4ea9f09, 0xd629b07c, + 0xaf31a4b2, 0x312a3f23, 0x30c6a594, 0xc035a266, + 0x37744ebc, 0xa6fc82ca, 0xb0e090d0, 0x1533a7d8, + 0x4af10498, 0xf741ecda, 0xe7fcd50, 0x2f1791f6, + 0x8d764dd6, 0x4d43efb0, 0x54ccaa4d, 0xdfe49604, + 0xe39ed1b5, 0x1b4c6a88, 0xb8c12c1f, 0x7f466551, + 0x49d5eea, 0x5d018c35, 0x73fa8774, 0x2efb0b41, + 0x5ab3671d, 0x5292dbd2, 0x33e91056, 0x136dd647, + 0x8c9ad761, 0x7a37a10c, 0x8e59f814, 0x89eb133c, + 0xeecea927, 0x35b761c9, 0xede11ce5, 0x3c7a47b1, + 0x599cd2df, 0x3f55f273, 0x791814ce, 0xbf73c737, + 0xea53f7cd, 0x5b5ffdaa, 0x14df3d6f, 0x867844db, + 0x81caaff3, 0x3eb968c4, 0x2c382434, 0x5fc2a340, + 0x72161dc3, 0xcbce225, 0x8b283c49, 0x41ff0d95, + 0x7139a801, 0xde080cb3, 0x9cd8b4e4, 0x906456c1, + 0x617bcb84, 0x70d532b6, 0x74486c5c, 0x42d0b857 +}; +/* clang-format on */ + +/* clang-format off */ +static const uint32_t U2[256] = { + 0xa75051f4, 0x65537e41, 0xa4c31a17, 0x5e963a27, + 0x6bcb3bab, 0x45f11f9d, 0x58abacfa, 0x3934be3, + 0xfa552030, 0x6df6ad76, 0x769188cc, 0x4c25f502, + 0xd7fc4fe5, 0xcbd7c52a, 0x44802635, 0xa38fb562, + 0x5a49deb1, 0x1b6725ba, 0xe9845ea, 0xc0e15dfe, + 0x7502c32f, 0xf012814c, 0x97a38d46, 0xf9c66bd3, + 0x5fe7038f, 0x9c951592, 0x7aebbf6d, 0x59da9552, + 0x832dd4be, 0x21d35874, 0x692949e0, 0xc8448ec9, + 0x896a75c2, 0x7978f48e, 0x3e6b9958, 0x71dd27b9, + 0x4fb6bee1, 0xad17f088, 0xac66c920, 0x3ab47dce, + 0x4a1863df, 0x3182e51a, 0x33609751, 0x7f456253, + 0x77e0b164, 0xae84bb6b, 0xa01cfe81, 0x2b94f908, + 0x68587048, 0xfd198f45, 0x6c8794de, 0xf8b7527b, + 0xd323ab73, 0x2e2724b, 0x8f57e31f, 0xab2a6655, + 0x2807b2eb, 0xc2032fb5, 0x7b9a86c5, 0x8a5d337, + 0x87f23028, 0xa5b223bf, 0x6aba0203, 0x825ced16, + 0x1c2b8acf, 0xb492a779, 0xf2f0f307, 0xe2a14e69, + 0xf4cd65da, 0xbed50605, 0x621fd134, 0xfe8ac4a6, + 0x539d342e, 0x55a0a2f3, 0xe132058a, 0xeb75a4f6, + 0xec390b83, 0xefaa4060, 0x9f065e71, 0x1051bd6e, + 0x8af93e21, 0x63d96dd, 0x5aedd3e, 0xbd464de6, + 0x8db59154, 0x5d0571c4, 0xd46f0406, 0x15ff6050, + 0xfb241998, 0xe997d6bd, 0x43cc8940, 0x9e7767d9, + 0x42bdb0e8, 0x8b880789, 0x5b38e719, 0xeedb79c8, + 0xa47a17c, 0xfe97c42, 0x1ec9f884, 0x0, + 0x86830980, 0xed48322b, 0x70ac1e11, 0x724e6c5a, + 0xfffbfd0e, 0x38560f85, 0xd51e3dae, 0x3927362d, + 0xd9640a0f, 0xa621685c, 0x54d19b5b, 0x2e3a2436, + 0x67b10c0a, 0xe70f9357, 0x96d2b4ee, 0x919e1b9b, + 0xc54f80c0, 0x20a261dc, 0x4b695a77, 0x1a161c12, + 0xba0ae293, 0x2ae5c0a0, 0xe0433c22, 0x171d121b, + 0xd0b0e09, 0xc7adf28b, 0xa8b92db6, 0xa9c8141e, + 0x198557f1, 0x74caf75, 0xddbbee99, 0x60fda37f, + 0x269ff701, 0xf5bc5c72, 0x3bc54466, 0x7e345bfb, + 0x29768b43, 0xc6dccb23, 0xfc68b6ed, 0xf163b8e4, + 0xdccad731, 0x85104263, 0x22401397, 0x112084c6, + 0x247d854a, 0x3df8d2bb, 0x3211aef9, 0xa16dc729, + 0x2f4b1d9e, 0x30f3dcb2, 0x52ec0d86, 0xe3d077c1, + 0x166c2bb3, 0xb999a970, 0x48fa1194, 0x642247e9, + 0x8cc4a8fc, 0x3f1aa0f0, 0x2cd8567d, 0x90ef2233, + 0x4ec78749, 0xd1c1d938, 0xa2fe8cca, 0xb3698d4, + 0x81cfa6f5, 0xde28a57a, 0x8e26dab7, 0xbfa43fad, + 0x9de42c3a, 0x920d5078, 0xcc9b6a5f, 0x4662547e, + 0x13c2f68d, 0xb8e890d8, 0xf75e2e39, 0xaff582c3, + 0x80be9f5d, 0x937c69d0, 0x2da96fd5, 0x12b3cf25, + 0x993bc8ac, 0x7da71018, 0x636ee89c, 0xbb7bdb3b, + 0x7809cd26, 0x18f46e59, 0xb701ec9a, 0x9aa8834f, + 0x6e65e695, 0xe67eaaff, 0xcf0821bc, 0xe8e6ef15, + 0x9bd9bae7, 0x36ce4a6f, 0x9d4ea9f, 0x7cd629b0, + 0xb2af31a4, 0x23312a3f, 0x9430c6a5, 0x66c035a2, + 0xbc37744e, 0xcaa6fc82, 0xd0b0e090, 0xd81533a7, + 0x984af104, 0xdaf741ec, 0x500e7fcd, 0xf62f1791, + 0xd68d764d, 0xb04d43ef, 0x4d54ccaa, 0x4dfe496, + 0xb5e39ed1, 0x881b4c6a, 0x1fb8c12c, 0x517f4665, + 0xea049d5e, 0x355d018c, 0x7473fa87, 0x412efb0b, + 0x1d5ab367, 0xd25292db, 0x5633e910, 0x47136dd6, + 0x618c9ad7, 0xc7a37a1, 0x148e59f8, 0x3c89eb13, + 0x27eecea9, 0xc935b761, 0xe5ede11c, 0xb13c7a47, + 0xdf599cd2, 0x733f55f2, 0xce791814, 0x37bf73c7, + 0xcdea53f7, 0xaa5b5ffd, 0x6f14df3d, 0xdb867844, + 0xf381caaf, 0xc43eb968, 0x342c3824, 0x405fc2a3, + 0xc372161d, 0x250cbce2, 0x498b283c, 0x9541ff0d, + 0x17139a8, 0xb3de080c, 0xe49cd8b4, 0xc1906456, + 0x84617bcb, 0xb670d532, 0x5c74486c, 0x5742d0b8 +}; +/* clang-format on */ + +/* clang-format off */ +static const uint32_t U3[256] = { + 0xf4a75051, 0x4165537e, 0x17a4c31a, 0x275e963a, + 0xab6bcb3b, 0x9d45f11f, 0xfa58abac, 0xe303934b, + 0x30fa5520, 0x766df6ad, 0xcc769188, 0x24c25f5, + 0xe5d7fc4f, 0x2acbd7c5, 0x35448026, 0x62a38fb5, + 0xb15a49de, 0xba1b6725, 0xea0e9845, 0xfec0e15d, + 0x2f7502c3, 0x4cf01281, 0x4697a38d, 0xd3f9c66b, + 0x8f5fe703, 0x929c9515, 0x6d7aebbf, 0x5259da95, + 0xbe832dd4, 0x7421d358, 0xe0692949, 0xc9c8448e, + 0xc2896a75, 0x8e7978f4, 0x583e6b99, 0xb971dd27, + 0xe14fb6be, 0x88ad17f0, 0x20ac66c9, 0xce3ab47d, + 0xdf4a1863, 0x1a3182e5, 0x51336097, 0x537f4562, + 0x6477e0b1, 0x6bae84bb, 0x81a01cfe, 0x82b94f9, + 0x48685870, 0x45fd198f, 0xde6c8794, 0x7bf8b752, + 0x73d323ab, 0x4b02e272, 0x1f8f57e3, 0x55ab2a66, + 0xeb2807b2, 0xb5c2032f, 0xc57b9a86, 0x3708a5d3, + 0x2887f230, 0xbfa5b223, 0x36aba02, 0x16825ced, + 0xcf1c2b8a, 0x79b492a7, 0x7f2f0f3, 0x69e2a14e, + 0xdaf4cd65, 0x5bed506, 0x34621fd1, 0xa6fe8ac4, + 0x2e539d34, 0xf355a0a2, 0x8ae13205, 0xf6eb75a4, + 0x83ec390b, 0x60efaa40, 0x719f065e, 0x6e1051bd, + 0x218af93e, 0xdd063d96, 0x3e05aedd, 0xe6bd464d, + 0x548db591, 0xc45d0571, 0x6d46f04, 0x5015ff60, + 0x98fb2419, 0xbde997d6, 0x4043cc89, 0xd99e7767, + 0xe842bdb0, 0x898b8807, 0x195b38e7, 0xc8eedb79, + 0x7c0a47a1, 0x420fe97c, 0x841ec9f8, 0x0, + 0x80868309, 0x2bed4832, 0x1170ac1e, 0x5a724e6c, + 0xefffbfd, 0x8538560f, 0xaed51e3d, 0x2d392736, + 0xfd9640a, 0x5ca62168, 0x5b54d19b, 0x362e3a24, + 0xa67b10c, 0x57e70f93, 0xee96d2b4, 0x9b919e1b, + 0xc0c54f80, 0xdc20a261, 0x774b695a, 0x121a161c, + 0x93ba0ae2, 0xa02ae5c0, 0x22e0433c, 0x1b171d12, + 0x90d0b0e, 0x8bc7adf2, 0xb6a8b92d, 0x1ea9c814, + 0xf1198557, 0x75074caf, 0x99ddbbee, 0x7f60fda3, + 0x1269ff7, 0x72f5bc5c, 0x663bc544, 0xfb7e345b, + 0x4329768b, 0x23c6dccb, 0xedfc68b6, 0xe4f163b8, + 0x31dccad7, 0x63851042, 0x97224013, 0xc6112084, + 0x4a247d85, 0xbb3df8d2, 0xf93211ae, 0x29a16dc7, + 0x9e2f4b1d, 0xb230f3dc, 0x8652ec0d, 0xc1e3d077, + 0xb3166c2b, 0x70b999a9, 0x9448fa11, 0xe9642247, + 0xfc8cc4a8, 0xf03f1aa0, 0x7d2cd856, 0x3390ef22, + 0x494ec787, 0x38d1c1d9, 0xcaa2fe8c, 0xd40b3698, + 0xf581cfa6, 0x7ade28a5, 0xb78e26da, 0xadbfa43f, + 0x3a9de42c, 0x78920d50, 0x5fcc9b6a, 0x7e466254, + 0x8d13c2f6, 0xd8b8e890, 0x39f75e2e, 0xc3aff582, + 0x5d80be9f, 0xd0937c69, 0xd52da96f, 0x2512b3cf, + 0xac993bc8, 0x187da710, 0x9c636ee8, 0x3bbb7bdb, + 0x267809cd, 0x5918f46e, 0x9ab701ec, 0x4f9aa883, + 0x956e65e6, 0xffe67eaa, 0xbccf0821, 0x15e8e6ef, + 0xe79bd9ba, 0x6f36ce4a, 0x9f09d4ea, 0xb07cd629, + 0xa4b2af31, 0x3f23312a, 0xa59430c6, 0xa266c035, + 0x4ebc3774, 0x82caa6fc, 0x90d0b0e0, 0xa7d81533, + 0x4984af1, 0xecdaf741, 0xcd500e7f, 0x91f62f17, + 0x4dd68d76, 0xefb04d43, 0xaa4d54cc, 0x9604dfe4, + 0xd1b5e39e, 0x6a881b4c, 0x2c1fb8c1, 0x65517f46, + 0x5eea049d, 0x8c355d01, 0x877473fa, 0xb412efb, + 0x671d5ab3, 0xdbd25292, 0x105633e9, 0xd647136d, + 0xd7618c9a, 0xa10c7a37, 0xf8148e59, 0x133c89eb, + 0xa927eece, 0x61c935b7, 0x1ce5ede1, 0x47b13c7a, + 0xd2df599c, 0xf2733f55, 0x14ce7918, 0xc737bf73, + 0xf7cdea53, 0xfdaa5b5f, 0x3d6f14df, 0x44db8678, + 0xaff381ca, 0x68c43eb9, 0x24342c38, 0xa3405fc2, + 0x1dc37216, 0xe2250cbc, 0x3c498b28, 0xd9541ff, + 0xa8017139, 0xcb3de08, 0xb4e49cd8, 0x56c19064, + 0xcb84617b, 0x32b670d5, 0x6c5c7448, 0xb85742d0 +}; +/* clang-format on */ +#endif + +/* + * the following tables (aes_sbox, aes_inv_sbox, T4, U4) are + * endian-neutral + */ +/* clang-format off */ +static const uint8_t aes_sbox[256] = { + 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, + 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, + 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, + 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, + 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, + 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, + 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, + 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, + 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, + 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, + 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, + 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, + 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, + 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, + 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, + 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, + 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, + 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, + 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, + 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, + 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, + 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, + 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, + 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, + 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, + 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, + 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, + 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, + 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, + 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, + 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, + 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 +}; +/* clang-format on */ + +#ifndef CPU_RISC +/* clang-format off */ +static const uint8_t aes_inv_sbox[256] = { + 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, + 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb, + 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, + 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb, + 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, + 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e, + 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, + 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25, + 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, + 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92, + 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, + 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84, + 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, + 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06, + 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, + 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b, + 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, + 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73, + 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, + 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e, + 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, + 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b, + 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, + 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4, + 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, + 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f, + 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, + 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef, + 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, + 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61, + 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, + 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d +}; +/* clang-format on */ +#endif /* ! CPU_RISC */ + +#ifdef CPU_RISC +/* clang-format off */ +static const uint32_t T4[256] = { + 0x63636363, 0x7c7c7c7c, 0x77777777, 0x7b7b7b7b, + 0xf2f2f2f2, 0x6b6b6b6b, 0x6f6f6f6f, 0xc5c5c5c5, + 0x30303030, 0x01010101, 0x67676767, 0x2b2b2b2b, + 0xfefefefe, 0xd7d7d7d7, 0xabababab, 0x76767676, + 0xcacacaca, 0x82828282, 0xc9c9c9c9, 0x7d7d7d7d, + 0xfafafafa, 0x59595959, 0x47474747, 0xf0f0f0f0, + 0xadadadad, 0xd4d4d4d4, 0xa2a2a2a2, 0xafafafaf, + 0x9c9c9c9c, 0xa4a4a4a4, 0x72727272, 0xc0c0c0c0, + 0xb7b7b7b7, 0xfdfdfdfd, 0x93939393, 0x26262626, + 0x36363636, 0x3f3f3f3f, 0xf7f7f7f7, 0xcccccccc, + 0x34343434, 0xa5a5a5a5, 0xe5e5e5e5, 0xf1f1f1f1, + 0x71717171, 0xd8d8d8d8, 0x31313131, 0x15151515, + 0x04040404, 0xc7c7c7c7, 0x23232323, 0xc3c3c3c3, + 0x18181818, 0x96969696, 0x05050505, 0x9a9a9a9a, + 0x07070707, 0x12121212, 0x80808080, 0xe2e2e2e2, + 0xebebebeb, 0x27272727, 0xb2b2b2b2, 0x75757575, + 0x09090909, 0x83838383, 0x2c2c2c2c, 0x1a1a1a1a, + 0x1b1b1b1b, 0x6e6e6e6e, 0x5a5a5a5a, 0xa0a0a0a0, + 0x52525252, 0x3b3b3b3b, 0xd6d6d6d6, 0xb3b3b3b3, + 0x29292929, 0xe3e3e3e3, 0x2f2f2f2f, 0x84848484, + 0x53535353, 0xd1d1d1d1, 0x00000000, 0xedededed, + 0x20202020, 0xfcfcfcfc, 0xb1b1b1b1, 0x5b5b5b5b, + 0x6a6a6a6a, 0xcbcbcbcb, 0xbebebebe, 0x39393939, + 0x4a4a4a4a, 0x4c4c4c4c, 0x58585858, 0xcfcfcfcf, + 0xd0d0d0d0, 0xefefefef, 0xaaaaaaaa, 0xfbfbfbfb, + 0x43434343, 0x4d4d4d4d, 0x33333333, 0x85858585, + 0x45454545, 0xf9f9f9f9, 0x02020202, 0x7f7f7f7f, + 0x50505050, 0x3c3c3c3c, 0x9f9f9f9f, 0xa8a8a8a8, + 0x51515151, 0xa3a3a3a3, 0x40404040, 0x8f8f8f8f, + 0x92929292, 0x9d9d9d9d, 0x38383838, 0xf5f5f5f5, + 0xbcbcbcbc, 0xb6b6b6b6, 0xdadadada, 0x21212121, + 0x10101010, 0xffffffff, 0xf3f3f3f3, 0xd2d2d2d2, + 0xcdcdcdcd, 0x0c0c0c0c, 0x13131313, 0xecececec, + 0x5f5f5f5f, 0x97979797, 0x44444444, 0x17171717, + 0xc4c4c4c4, 0xa7a7a7a7, 0x7e7e7e7e, 0x3d3d3d3d, + 0x64646464, 0x5d5d5d5d, 0x19191919, 0x73737373, + 0x60606060, 0x81818181, 0x4f4f4f4f, 0xdcdcdcdc, + 0x22222222, 0x2a2a2a2a, 0x90909090, 0x88888888, + 0x46464646, 0xeeeeeeee, 0xb8b8b8b8, 0x14141414, + 0xdededede, 0x5e5e5e5e, 0x0b0b0b0b, 0xdbdbdbdb, + 0xe0e0e0e0, 0x32323232, 0x3a3a3a3a, 0x0a0a0a0a, + 0x49494949, 0x06060606, 0x24242424, 0x5c5c5c5c, + 0xc2c2c2c2, 0xd3d3d3d3, 0xacacacac, 0x62626262, + 0x91919191, 0x95959595, 0xe4e4e4e4, 0x79797979, + 0xe7e7e7e7, 0xc8c8c8c8, 0x37373737, 0x6d6d6d6d, + 0x8d8d8d8d, 0xd5d5d5d5, 0x4e4e4e4e, 0xa9a9a9a9, + 0x6c6c6c6c, 0x56565656, 0xf4f4f4f4, 0xeaeaeaea, + 0x65656565, 0x7a7a7a7a, 0xaeaeaeae, 0x08080808, + 0xbabababa, 0x78787878, 0x25252525, 0x2e2e2e2e, + 0x1c1c1c1c, 0xa6a6a6a6, 0xb4b4b4b4, 0xc6c6c6c6, + 0xe8e8e8e8, 0xdddddddd, 0x74747474, 0x1f1f1f1f, + 0x4b4b4b4b, 0xbdbdbdbd, 0x8b8b8b8b, 0x8a8a8a8a, + 0x70707070, 0x3e3e3e3e, 0xb5b5b5b5, 0x66666666, + 0x48484848, 0x03030303, 0xf6f6f6f6, 0x0e0e0e0e, + 0x61616161, 0x35353535, 0x57575757, 0xb9b9b9b9, + 0x86868686, 0xc1c1c1c1, 0x1d1d1d1d, 0x9e9e9e9e, + 0xe1e1e1e1, 0xf8f8f8f8, 0x98989898, 0x11111111, + 0x69696969, 0xd9d9d9d9, 0x8e8e8e8e, 0x94949494, + 0x9b9b9b9b, 0x1e1e1e1e, 0x87878787, 0xe9e9e9e9, + 0xcececece, 0x55555555, 0x28282828, 0xdfdfdfdf, + 0x8c8c8c8c, 0xa1a1a1a1, 0x89898989, 0x0d0d0d0d, + 0xbfbfbfbf, 0xe6e6e6e6, 0x42424242, 0x68686868, + 0x41414141, 0x99999999, 0x2d2d2d2d, 0x0f0f0f0f, + 0xb0b0b0b0, 0x54545454, 0xbbbbbbbb, 0x16161616 +}; +/* clang-format on */ + +/* clang-format off */ +static const uint32_t U4[256] = { + 0x52525252, 0x9090909, 0x6a6a6a6a, 0xd5d5d5d5, + 0x30303030, 0x36363636, 0xa5a5a5a5, 0x38383838, + 0xbfbfbfbf, 0x40404040, 0xa3a3a3a3, 0x9e9e9e9e, + 0x81818181, 0xf3f3f3f3, 0xd7d7d7d7, 0xfbfbfbfb, + 0x7c7c7c7c, 0xe3e3e3e3, 0x39393939, 0x82828282, + 0x9b9b9b9b, 0x2f2f2f2f, 0xffffffff, 0x87878787, + 0x34343434, 0x8e8e8e8e, 0x43434343, 0x44444444, + 0xc4c4c4c4, 0xdededede, 0xe9e9e9e9, 0xcbcbcbcb, + 0x54545454, 0x7b7b7b7b, 0x94949494, 0x32323232, + 0xa6a6a6a6, 0xc2c2c2c2, 0x23232323, 0x3d3d3d3d, + 0xeeeeeeee, 0x4c4c4c4c, 0x95959595, 0xb0b0b0b, + 0x42424242, 0xfafafafa, 0xc3c3c3c3, 0x4e4e4e4e, + 0x8080808, 0x2e2e2e2e, 0xa1a1a1a1, 0x66666666, + 0x28282828, 0xd9d9d9d9, 0x24242424, 0xb2b2b2b2, + 0x76767676, 0x5b5b5b5b, 0xa2a2a2a2, 0x49494949, + 0x6d6d6d6d, 0x8b8b8b8b, 0xd1d1d1d1, 0x25252525, + 0x72727272, 0xf8f8f8f8, 0xf6f6f6f6, 0x64646464, + 0x86868686, 0x68686868, 0x98989898, 0x16161616, + 0xd4d4d4d4, 0xa4a4a4a4, 0x5c5c5c5c, 0xcccccccc, + 0x5d5d5d5d, 0x65656565, 0xb6b6b6b6, 0x92929292, + 0x6c6c6c6c, 0x70707070, 0x48484848, 0x50505050, + 0xfdfdfdfd, 0xedededed, 0xb9b9b9b9, 0xdadadada, + 0x5e5e5e5e, 0x15151515, 0x46464646, 0x57575757, + 0xa7a7a7a7, 0x8d8d8d8d, 0x9d9d9d9d, 0x84848484, + 0x90909090, 0xd8d8d8d8, 0xabababab, 0x0, + 0x8c8c8c8c, 0xbcbcbcbc, 0xd3d3d3d3, 0xa0a0a0a, + 0xf7f7f7f7, 0xe4e4e4e4, 0x58585858, 0x5050505, + 0xb8b8b8b8, 0xb3b3b3b3, 0x45454545, 0x6060606, + 0xd0d0d0d0, 0x2c2c2c2c, 0x1e1e1e1e, 0x8f8f8f8f, + 0xcacacaca, 0x3f3f3f3f, 0xf0f0f0f, 0x2020202, + 0xc1c1c1c1, 0xafafafaf, 0xbdbdbdbd, 0x3030303, + 0x1010101, 0x13131313, 0x8a8a8a8a, 0x6b6b6b6b, + 0x3a3a3a3a, 0x91919191, 0x11111111, 0x41414141, + 0x4f4f4f4f, 0x67676767, 0xdcdcdcdc, 0xeaeaeaea, + 0x97979797, 0xf2f2f2f2, 0xcfcfcfcf, 0xcececece, + 0xf0f0f0f0, 0xb4b4b4b4, 0xe6e6e6e6, 0x73737373, + 0x96969696, 0xacacacac, 0x74747474, 0x22222222, + 0xe7e7e7e7, 0xadadadad, 0x35353535, 0x85858585, + 0xe2e2e2e2, 0xf9f9f9f9, 0x37373737, 0xe8e8e8e8, + 0x1c1c1c1c, 0x75757575, 0xdfdfdfdf, 0x6e6e6e6e, + 0x47474747, 0xf1f1f1f1, 0x1a1a1a1a, 0x71717171, + 0x1d1d1d1d, 0x29292929, 0xc5c5c5c5, 0x89898989, + 0x6f6f6f6f, 0xb7b7b7b7, 0x62626262, 0xe0e0e0e, + 0xaaaaaaaa, 0x18181818, 0xbebebebe, 0x1b1b1b1b, + 0xfcfcfcfc, 0x56565656, 0x3e3e3e3e, 0x4b4b4b4b, + 0xc6c6c6c6, 0xd2d2d2d2, 0x79797979, 0x20202020, + 0x9a9a9a9a, 0xdbdbdbdb, 0xc0c0c0c0, 0xfefefefe, + 0x78787878, 0xcdcdcdcd, 0x5a5a5a5a, 0xf4f4f4f4, + 0x1f1f1f1f, 0xdddddddd, 0xa8a8a8a8, 0x33333333, + 0x88888888, 0x7070707, 0xc7c7c7c7, 0x31313131, + 0xb1b1b1b1, 0x12121212, 0x10101010, 0x59595959, + 0x27272727, 0x80808080, 0xecececec, 0x5f5f5f5f, + 0x60606060, 0x51515151, 0x7f7f7f7f, 0xa9a9a9a9, + 0x19191919, 0xb5b5b5b5, 0x4a4a4a4a, 0xd0d0d0d, + 0x2d2d2d2d, 0xe5e5e5e5, 0x7a7a7a7a, 0x9f9f9f9f, + 0x93939393, 0xc9c9c9c9, 0x9c9c9c9c, 0xefefefef, + 0xa0a0a0a0, 0xe0e0e0e0, 0x3b3b3b3b, 0x4d4d4d4d, + 0xaeaeaeae, 0x2a2a2a2a, 0xf5f5f5f5, 0xb0b0b0b0, + 0xc8c8c8c8, 0xebebebeb, 0xbbbbbbbb, 0x3c3c3c3c, + 0x83838383, 0x53535353, 0x99999999, 0x61616161, + 0x17171717, 0x2b2b2b2b, 0x4040404, 0x7e7e7e7e, + 0xbabababa, 0x77777777, 0xd6d6d6d6, 0x26262626, + 0xe1e1e1e1, 0x69696969, 0x14141414, 0x63636363, + 0x55555555, 0x21212121, 0xc0c0c0c, 0x7d7d7d7d +}; +/* clang-format on */ +#endif /* CPU_RISC */ + +#define gf2_8_field_polynomial 0x1B +/* + * gf2_8_shift(z) returns the result of the GF(2^8) 'multiply by x' + * operation, using the field representation from AES; that is, the + * next gf2_8 value in the cyclic representation of that field. The + * value z should be an uint8_t. + */ +#define gf2_8_shift(z) \ + (((z)&128) ? (((z) << 1) ^ gf2_8_field_polynomial) : ((z) << 1)) + +/* aes internals */ + +static void aes_128_expand_encryption_key(const uint8_t *key, + srtp_aes_expanded_key_t *expanded_key) +{ + int i; + uint8_t rc; + + /* initialize round constant */ + rc = 1; + + expanded_key->num_rounds = 10; + + v128_copy_octet_string(&expanded_key->round[0], key); + + /* loop over round keys */ + for (i = 1; i < 11; i++) { + /* munge first word of round key */ + expanded_key->round[i].v8[0] = + aes_sbox[expanded_key->round[i - 1].v8[13]] ^ rc; + expanded_key->round[i].v8[1] = + aes_sbox[expanded_key->round[i - 1].v8[14]]; + expanded_key->round[i].v8[2] = + aes_sbox[expanded_key->round[i - 1].v8[15]]; + expanded_key->round[i].v8[3] = + aes_sbox[expanded_key->round[i - 1].v8[12]]; + + expanded_key->round[i].v32[0] ^= expanded_key->round[i - 1].v32[0]; + + /* set remaining 32 bit words to the exor of the one previous with + * the one four words previous */ + + expanded_key->round[i].v32[1] = + expanded_key->round[i].v32[0] ^ expanded_key->round[i - 1].v32[1]; + + expanded_key->round[i].v32[2] = + expanded_key->round[i].v32[1] ^ expanded_key->round[i - 1].v32[2]; + + expanded_key->round[i].v32[3] = + expanded_key->round[i].v32[2] ^ expanded_key->round[i - 1].v32[3]; + + /* modify round constant */ + rc = gf2_8_shift(rc); + } +} + +static void aes_256_expand_encryption_key(const unsigned char *key, + srtp_aes_expanded_key_t *expanded_key) +{ + int i; + uint8_t rc; + + /* initialize round constant */ + rc = 1; + + expanded_key->num_rounds = 14; + + v128_copy_octet_string(&expanded_key->round[0], key); + v128_copy_octet_string(&expanded_key->round[1], key + 16); + + /* loop over rest of round keys */ + for (i = 2; i < 15; i++) { + /* munge first word of round key */ + if ((i & 1) == 0) { + expanded_key->round[i].v8[0] = + aes_sbox[expanded_key->round[i - 1].v8[13]] ^ rc; + expanded_key->round[i].v8[1] = + aes_sbox[expanded_key->round[i - 1].v8[14]]; + expanded_key->round[i].v8[2] = + aes_sbox[expanded_key->round[i - 1].v8[15]]; + expanded_key->round[i].v8[3] = + aes_sbox[expanded_key->round[i - 1].v8[12]]; + + /* modify round constant */ + rc = gf2_8_shift(rc); + } else { + expanded_key->round[i].v8[0] = + aes_sbox[expanded_key->round[i - 1].v8[12]]; + expanded_key->round[i].v8[1] = + aes_sbox[expanded_key->round[i - 1].v8[13]]; + expanded_key->round[i].v8[2] = + aes_sbox[expanded_key->round[i - 1].v8[14]]; + expanded_key->round[i].v8[3] = + aes_sbox[expanded_key->round[i - 1].v8[15]]; + } + + expanded_key->round[i].v32[0] ^= expanded_key->round[i - 2].v32[0]; + + /* set remaining 32 bit words to the exor of the one previous with + * the one eight words previous */ + + expanded_key->round[i].v32[1] = + expanded_key->round[i].v32[0] ^ expanded_key->round[i - 2].v32[1]; + + expanded_key->round[i].v32[2] = + expanded_key->round[i].v32[1] ^ expanded_key->round[i - 2].v32[2]; + + expanded_key->round[i].v32[3] = + expanded_key->round[i].v32[2] ^ expanded_key->round[i - 2].v32[3]; + } +} + +srtp_err_status_t srtp_aes_expand_encryption_key( + const uint8_t *key, + int key_len, + srtp_aes_expanded_key_t *expanded_key) +{ + if (key_len == 16) { + aes_128_expand_encryption_key(key, expanded_key); + return srtp_err_status_ok; + } else if (key_len == 24) { + /* AES-192 not yet supported */ + return srtp_err_status_bad_param; + } else if (key_len == 32) { + aes_256_expand_encryption_key(key, expanded_key); + return srtp_err_status_ok; + } else { + return srtp_err_status_bad_param; + } +} + +srtp_err_status_t srtp_aes_expand_decryption_key( + const uint8_t *key, + int key_len, + srtp_aes_expanded_key_t *expanded_key) +{ + int i; + srtp_err_status_t status; + int num_rounds = expanded_key->num_rounds; + + status = srtp_aes_expand_encryption_key(key, key_len, expanded_key); + if (status) { + return status; + } + + /* invert the order of the round keys */ + for (i = 0; i < num_rounds / 2; i++) { + v128_t tmp; + v128_copy(&tmp, &expanded_key->round[num_rounds - i]); + v128_copy(&expanded_key->round[num_rounds - i], + &expanded_key->round[i]); + v128_copy(&expanded_key->round[i], &tmp); + } + + /* + * apply the inverse mixColumn transform to the round keys (except + * for the first and the last) + * + * mixColumn is implemented by using the tables U0, U1, U2, U3, + * followed by the T4 table (which cancels out the use of the sbox + * in the U-tables) + */ + for (i = 1; i < num_rounds; i++) { +#ifdef CPU_RISC + uint32_t tmp; + +#ifdef WORDS_BIGENDIAN + /* clang-format off */ + tmp = expanded_key->round[i].v32[0]; + expanded_key->round[i].v32[0] = + U0[T4[(tmp >> 24) ] & 0xff] ^ + U1[T4[(tmp >> 16) & 0xff] & 0xff] ^ + U2[T4[(tmp >> 8) & 0xff] & 0xff] ^ + U3[T4[(tmp) & 0xff] & 0xff]; + + tmp = expanded_key->round[i].v32[1]; + expanded_key->round[i].v32[1] = + U0[T4[(tmp >> 24) ] & 0xff] ^ + U1[T4[(tmp >> 16) & 0xff] & 0xff] ^ + U2[T4[(tmp >> 8) & 0xff] & 0xff] ^ + U3[T4[(tmp) & 0xff] & 0xff]; + + tmp = expanded_key->round[i].v32[2]; + expanded_key->round[i].v32[2] = + U0[T4[(tmp >> 24) ] & 0xff] ^ + U1[T4[(tmp >> 16) & 0xff] & 0xff] ^ + U2[T4[(tmp >> 8) & 0xff] & 0xff] ^ + U3[T4[(tmp) & 0xff] & 0xff]; + + tmp = expanded_key->round[i].v32[3]; + expanded_key->round[i].v32[3] = + U0[T4[(tmp >> 24) ] & 0xff] ^ + U1[T4[(tmp >> 16) & 0xff] & 0xff] ^ + U2[T4[(tmp >> 8) & 0xff] & 0xff] ^ + U3[T4[(tmp) & 0xff] & 0xff]; +#else + tmp = expanded_key->round[i].v32[0]; + expanded_key->round[i].v32[0] = + U3[T4[(tmp >> 24) ] & 0xff] ^ + U2[T4[(tmp >> 16) & 0xff] & 0xff] ^ + U1[T4[(tmp >> 8) & 0xff] & 0xff] ^ + U0[T4[(tmp) & 0xff] & 0xff]; + + tmp = expanded_key->round[i].v32[1]; + expanded_key->round[i].v32[1] = + U3[T4[(tmp >> 24) ] & 0xff] ^ + U2[T4[(tmp >> 16) & 0xff] & 0xff] ^ + U1[T4[(tmp >> 8) & 0xff] & 0xff] ^ + U0[T4[(tmp) & 0xff] & 0xff]; + + tmp = expanded_key->round[i].v32[2]; + expanded_key->round[i].v32[2] = + U3[T4[(tmp >> 24) ] & 0xff] ^ + U2[T4[(tmp >> 16) & 0xff] & 0xff] ^ + U1[T4[(tmp >> 8) & 0xff] & 0xff] ^ + U0[T4[(tmp) & 0xff] & 0xff]; + + tmp = expanded_key->round[i].v32[3]; + expanded_key->round[i].v32[3] = + U3[T4[(tmp >> 24) ] & 0xff] ^ + U2[T4[(tmp >> 16) & 0xff] & 0xff] ^ + U1[T4[(tmp >> 8) & 0xff] & 0xff] ^ + U0[T4[(tmp) & 0xff] & 0xff]; +/* clang-format on */ +#endif /* WORDS_BIGENDIAN */ + +#else /* assume CPU_CISC */ + + uint32_t c0, c1, c2, c3; + + c0 = U0[aes_sbox[expanded_key->round[i].v8[0]]] ^ + U1[aes_sbox[expanded_key->round[i].v8[1]]] ^ + U2[aes_sbox[expanded_key->round[i].v8[2]]] ^ + U3[aes_sbox[expanded_key->round[i].v8[3]]]; + + c1 = U0[aes_sbox[expanded_key->round[i].v8[4]]] ^ + U1[aes_sbox[expanded_key->round[i].v8[5]]] ^ + U2[aes_sbox[expanded_key->round[i].v8[6]]] ^ + U3[aes_sbox[expanded_key->round[i].v8[7]]]; + + c2 = U0[aes_sbox[expanded_key->round[i].v8[8]]] ^ + U1[aes_sbox[expanded_key->round[i].v8[9]]] ^ + U2[aes_sbox[expanded_key->round[i].v8[10]]] ^ + U3[aes_sbox[expanded_key->round[i].v8[11]]]; + + c3 = U0[aes_sbox[expanded_key->round[i].v8[12]]] ^ + U1[aes_sbox[expanded_key->round[i].v8[13]]] ^ + U2[aes_sbox[expanded_key->round[i].v8[14]]] ^ + U3[aes_sbox[expanded_key->round[i].v8[15]]]; + + expanded_key->round[i].v32[0] = c0; + expanded_key->round[i].v32[1] = c1; + expanded_key->round[i].v32[2] = c2; + expanded_key->round[i].v32[3] = c3; + +#endif + } + + return srtp_err_status_ok; +} + +#ifdef CPU_CISC + +static inline void aes_round(v128_t *state, const v128_t *round_key) +{ + uint32_t column0, column1, column2, column3; + + /* compute the columns of the output square in terms of the octets + of state, using the tables T0, T1, T2, T3 */ + + column0 = T0[state->v8[0]] ^ T1[state->v8[5]] ^ T2[state->v8[10]] ^ + T3[state->v8[15]]; + + column1 = T0[state->v8[4]] ^ T1[state->v8[9]] ^ T2[state->v8[14]] ^ + T3[state->v8[3]]; + + column2 = T0[state->v8[8]] ^ T1[state->v8[13]] ^ T2[state->v8[2]] ^ + T3[state->v8[7]]; + + column3 = T0[state->v8[12]] ^ T1[state->v8[1]] ^ T2[state->v8[6]] ^ + T3[state->v8[11]]; + + state->v32[0] = column0 ^ round_key->v32[0]; + state->v32[1] = column1 ^ round_key->v32[1]; + state->v32[2] = column2 ^ round_key->v32[2]; + state->v32[3] = column3 ^ round_key->v32[3]; +} + +static inline void aes_inv_round(v128_t *state, const v128_t *round_key) +{ + uint32_t column0, column1, column2, column3; + + /* compute the columns of the output square in terms of the octets + of state, using the tables U0, U1, U2, U3 */ + + column0 = U0[state->v8[0]] ^ U1[state->v8[13]] ^ U2[state->v8[10]] ^ + U3[state->v8[7]]; + + column1 = U0[state->v8[4]] ^ U1[state->v8[1]] ^ U2[state->v8[14]] ^ + U3[state->v8[11]]; + + column2 = U0[state->v8[8]] ^ U1[state->v8[5]] ^ U2[state->v8[2]] ^ + U3[state->v8[15]]; + + column3 = U0[state->v8[12]] ^ U1[state->v8[9]] ^ U2[state->v8[6]] ^ + U3[state->v8[3]]; + + state->v32[0] = column0 ^ round_key->v32[0]; + state->v32[1] = column1 ^ round_key->v32[1]; + state->v32[2] = column2 ^ round_key->v32[2]; + state->v32[3] = column3 ^ round_key->v32[3]; +} + +static inline void aes_final_round(v128_t *state, const v128_t *round_key) +{ + uint8_t tmp; + + /* byte substitutions and row shifts */ + /* first row - no shift */ + state->v8[0] = aes_sbox[state->v8[0]]; + state->v8[4] = aes_sbox[state->v8[4]]; + state->v8[8] = aes_sbox[state->v8[8]]; + state->v8[12] = aes_sbox[state->v8[12]]; + + /* second row - shift one left */ + tmp = aes_sbox[state->v8[1]]; + state->v8[1] = aes_sbox[state->v8[5]]; + state->v8[5] = aes_sbox[state->v8[9]]; + state->v8[9] = aes_sbox[state->v8[13]]; + state->v8[13] = tmp; + + /* third row - shift two left */ + tmp = aes_sbox[state->v8[10]]; + state->v8[10] = aes_sbox[state->v8[2]]; + state->v8[2] = tmp; + tmp = aes_sbox[state->v8[14]]; + state->v8[14] = aes_sbox[state->v8[6]]; + state->v8[6] = tmp; + + /* fourth row - shift three left */ + tmp = aes_sbox[state->v8[15]]; + state->v8[15] = aes_sbox[state->v8[11]]; + state->v8[11] = aes_sbox[state->v8[7]]; + state->v8[7] = aes_sbox[state->v8[3]]; + state->v8[3] = tmp; + + v128_xor_eq(state, round_key); +} + +static inline void aes_inv_final_round(v128_t *state, const v128_t *round_key) +{ + uint8_t tmp; + + /* byte substitutions and row shifts */ + /* first row - no shift */ + state->v8[0] = aes_inv_sbox[state->v8[0]]; + state->v8[4] = aes_inv_sbox[state->v8[4]]; + state->v8[8] = aes_inv_sbox[state->v8[8]]; + state->v8[12] = aes_inv_sbox[state->v8[12]]; + + /* second row - shift one right */ + tmp = aes_inv_sbox[state->v8[13]]; + state->v8[13] = aes_inv_sbox[state->v8[9]]; + state->v8[9] = aes_inv_sbox[state->v8[5]]; + state->v8[5] = aes_inv_sbox[state->v8[1]]; + state->v8[1] = tmp; + + /* third row - shift two right */ + tmp = aes_inv_sbox[state->v8[2]]; + state->v8[2] = aes_inv_sbox[state->v8[10]]; + state->v8[10] = tmp; + tmp = aes_inv_sbox[state->v8[6]]; + state->v8[6] = aes_inv_sbox[state->v8[14]]; + state->v8[14] = tmp; + + /* fourth row - shift three right */ + tmp = aes_inv_sbox[state->v8[3]]; + state->v8[3] = aes_inv_sbox[state->v8[7]]; + state->v8[7] = aes_inv_sbox[state->v8[11]]; + state->v8[11] = aes_inv_sbox[state->v8[15]]; + state->v8[15] = tmp; + + v128_xor_eq(state, round_key); +} + +#elif defined(CPU_RISC) + +static inline void aes_round(v128_t *state, const v128_t *round_key) +{ + uint32_t column0, column1, column2, column3; + +/* compute the columns of the output square in terms of the octets + of state, using the tables T0, T1, T2, T3 */ +#ifdef WORDS_BIGENDIAN + column0 = T0[state->v32[0] >> 24] ^ T1[(state->v32[1] >> 16) & 0xff] ^ + T2[(state->v32[2] >> 8) & 0xff] ^ T3[state->v32[3] & 0xff]; + + column1 = T0[state->v32[1] >> 24] ^ T1[(state->v32[2] >> 16) & 0xff] ^ + T2[(state->v32[3] >> 8) & 0xff] ^ T3[state->v32[0] & 0xff]; + + column2 = T0[state->v32[2] >> 24] ^ T1[(state->v32[3] >> 16) & 0xff] ^ + T2[(state->v32[0] >> 8) & 0xff] ^ T3[state->v32[1] & 0xff]; + + column3 = T0[state->v32[3] >> 24] ^ T1[(state->v32[0] >> 16) & 0xff] ^ + T2[(state->v32[1] >> 8) & 0xff] ^ T3[state->v32[2] & 0xff]; +#else + column0 = T0[state->v32[0] & 0xff] ^ T1[(state->v32[1] >> 8) & 0xff] ^ + T2[(state->v32[2] >> 16) & 0xff] ^ T3[state->v32[3] >> 24]; + + column1 = T0[state->v32[1] & 0xff] ^ T1[(state->v32[2] >> 8) & 0xff] ^ + T2[(state->v32[3] >> 16) & 0xff] ^ T3[state->v32[0] >> 24]; + + column2 = T0[state->v32[2] & 0xff] ^ T1[(state->v32[3] >> 8) & 0xff] ^ + T2[(state->v32[0] >> 16) & 0xff] ^ T3[state->v32[1] >> 24]; + + column3 = T0[state->v32[3] & 0xff] ^ T1[(state->v32[0] >> 8) & 0xff] ^ + T2[(state->v32[1] >> 16) & 0xff] ^ T3[state->v32[2] >> 24]; +#endif /* WORDS_BIGENDIAN */ + + state->v32[0] = column0 ^ round_key->v32[0]; + state->v32[1] = column1 ^ round_key->v32[1]; + state->v32[2] = column2 ^ round_key->v32[2]; + state->v32[3] = column3 ^ round_key->v32[3]; +} + +static inline void aes_inv_round(v128_t *state, const v128_t *round_key) +{ + uint32_t column0, column1, column2, column3; + +/* compute the columns of the output square in terms of the octets + of state, using the tables U0, U1, U2, U3 */ + +#ifdef WORDS_BIGENDIAN + column0 = U0[state->v32[0] >> 24] ^ U1[(state->v32[3] >> 16) & 0xff] ^ + U2[(state->v32[2] >> 8) & 0xff] ^ U3[state->v32[1] & 0xff]; + + column1 = U0[state->v32[1] >> 24] ^ U1[(state->v32[0] >> 16) & 0xff] ^ + U2[(state->v32[3] >> 8) & 0xff] ^ U3[state->v32[2] & 0xff]; + + column2 = U0[state->v32[2] >> 24] ^ U1[(state->v32[1] >> 16) & 0xff] ^ + U2[(state->v32[0] >> 8) & 0xff] ^ U3[state->v32[3] & 0xff]; + + column3 = U0[state->v32[3] >> 24] ^ U1[(state->v32[2] >> 16) & 0xff] ^ + U2[(state->v32[1] >> 8) & 0xff] ^ U3[state->v32[0] & 0xff]; +#else + column0 = U0[state->v32[0] & 0xff] ^ U1[(state->v32[3] >> 8) & 0xff] ^ + U2[(state->v32[2] >> 16) & 0xff] ^ + U3[(state->v32[1] >> 24) & 0xff]; + + column1 = U0[state->v32[1] & 0xff] ^ U1[(state->v32[0] >> 8) & 0xff] ^ + U2[(state->v32[3] >> 16) & 0xff] ^ + U3[(state->v32[2] >> 24) & 0xff]; + + column2 = U0[state->v32[2] & 0xff] ^ U1[(state->v32[1] >> 8) & 0xff] ^ + U2[(state->v32[0] >> 16) & 0xff] ^ + U3[(state->v32[3] >> 24) & 0xff]; + + column3 = U0[state->v32[3] & 0xff] ^ U1[(state->v32[2] >> 8) & 0xff] ^ + U2[(state->v32[1] >> 16) & 0xff] ^ + U3[(state->v32[0] >> 24) & 0xff]; +#endif /* WORDS_BIGENDIAN */ + + state->v32[0] = column0 ^ round_key->v32[0]; + state->v32[1] = column1 ^ round_key->v32[1]; + state->v32[2] = column2 ^ round_key->v32[2]; + state->v32[3] = column3 ^ round_key->v32[3]; +} + +static inline void aes_final_round(v128_t *state, const v128_t *round_key) +{ + uint32_t tmp0, tmp1, tmp2, tmp3; + +#ifdef WORDS_BIGENDIAN + /* clang-format off */ + tmp0 = (T4[(state->v32[0] >> 24)] & 0xff000000) ^ + (T4[(state->v32[1] >> 16) & 0xff] & 0x00ff0000) ^ + (T4[(state->v32[2] >> 8) & 0xff] & 0x0000ff00) ^ + (T4[(state->v32[3] ) & 0xff] & 0x000000ff) ^ + round_key->v32[0]; + + tmp1 = (T4[(state->v32[1] >> 24)] & 0xff000000) ^ + (T4[(state->v32[2] >> 16) & 0xff] & 0x00ff0000) ^ + (T4[(state->v32[3] >> 8) & 0xff] & 0x0000ff00) ^ + (T4[(state->v32[0] ) & 0xff] & 0x000000ff) ^ + round_key->v32[1]; + + tmp2 = (T4[(state->v32[2] >> 24)] & 0xff000000) ^ + (T4[(state->v32[3] >> 16) & 0xff] & 0x00ff0000) ^ + (T4[(state->v32[0] >> 8) & 0xff] & 0x0000ff00) ^ + (T4[(state->v32[1] ) & 0xff] & 0x000000ff) ^ + round_key->v32[2]; + + tmp3 = (T4[(state->v32[3] >> 24)] & 0xff000000) ^ + (T4[(state->v32[0] >> 16) & 0xff] & 0x00ff0000) ^ + (T4[(state->v32[1] >> 8) & 0xff] & 0x0000ff00) ^ + (T4[(state->v32[2] ) & 0xff] & 0x000000ff) ^ + round_key->v32[3]; +#else + tmp0 = (T4[(state->v32[3] >> 24)] & 0xff000000) ^ + (T4[(state->v32[2] >> 16) & 0xff] & 0x00ff0000) ^ + (T4[(state->v32[1] >> 8) & 0xff] & 0x0000ff00) ^ + (T4[(state->v32[0] ) & 0xff] & 0x000000ff) ^ + round_key->v32[0]; + + tmp1 = (T4[(state->v32[0] >> 24)] & 0xff000000) ^ + (T4[(state->v32[3] >> 16) & 0xff] & 0x00ff0000) ^ + (T4[(state->v32[2] >> 8) & 0xff] & 0x0000ff00) ^ + (T4[(state->v32[1] ) & 0xff] & 0x000000ff) ^ + round_key->v32[1]; + + tmp2 = (T4[(state->v32[1] >> 24)] & 0xff000000) ^ + (T4[(state->v32[0] >> 16) & 0xff] & 0x00ff0000) ^ + (T4[(state->v32[3] >> 8) & 0xff] & 0x0000ff00) ^ + (T4[(state->v32[2] ) & 0xff] & 0x000000ff) ^ + round_key->v32[2]; + + tmp3 = (T4[(state->v32[2] >> 24)] & 0xff000000) ^ + (T4[(state->v32[1] >> 16) & 0xff] & 0x00ff0000) ^ + (T4[(state->v32[0] >> 8) & 0xff] & 0x0000ff00) ^ + (T4[(state->v32[3] ) & 0xff] & 0x000000ff) ^ + round_key->v32[3]; +/* clang-format on */ +#endif /* WORDS_BIGENDIAN */ + + state->v32[0] = tmp0; + state->v32[1] = tmp1; + state->v32[2] = tmp2; + state->v32[3] = tmp3; +} + +static inline void aes_inv_final_round(v128_t *state, const v128_t *round_key) +{ + uint32_t tmp0, tmp1, tmp2, tmp3; + +#ifdef WORDS_BIGENDIAN + /* clang-format off */ + tmp0 = (U4[(state->v32[0] >> 24)] & 0xff000000) ^ + (U4[(state->v32[3] >> 16) & 0xff] & 0x00ff0000) ^ + (U4[(state->v32[2] >> 8) & 0xff] & 0x0000ff00) ^ + (U4[(state->v32[1] ) & 0xff] & 0x000000ff) ^ + round_key->v32[0]; + + tmp1 = (U4[(state->v32[1] >> 24)] & 0xff000000) ^ + (U4[(state->v32[0] >> 16) & 0xff] & 0x00ff0000) ^ + (U4[(state->v32[3] >> 8) & 0xff] & 0x0000ff00) ^ + (U4[(state->v32[2] ) & 0xff] & 0x000000ff) ^ + round_key->v32[1]; + + tmp2 = (U4[(state->v32[2] >> 24)] & 0xff000000) ^ + (U4[(state->v32[1] >> 16) & 0xff] & 0x00ff0000) ^ + (U4[(state->v32[0] >> 8) & 0xff] & 0x0000ff00) ^ + (U4[(state->v32[3] ) & 0xff] & 0x000000ff) ^ + round_key->v32[2]; + + tmp3 = (U4[(state->v32[3] >> 24)] & 0xff000000) ^ + (U4[(state->v32[2] >> 16) & 0xff] & 0x00ff0000) ^ + (U4[(state->v32[1] >> 8) & 0xff] & 0x0000ff00) ^ + (U4[(state->v32[0] ) & 0xff] & 0x000000ff) ^ + round_key->v32[3]; +#else + tmp0 = (U4[(state->v32[1] >> 24)] & 0xff000000) ^ + (U4[(state->v32[2] >> 16) & 0xff] & 0x00ff0000) ^ + (U4[(state->v32[3] >> 8) & 0xff] & 0x0000ff00) ^ + (U4[(state->v32[0] ) & 0xff] & 0x000000ff) ^ + round_key->v32[0]; + + tmp1 = (U4[(state->v32[2] >> 24)] & 0xff000000) ^ + (U4[(state->v32[3] >> 16) & 0xff] & 0x00ff0000) ^ + (U4[(state->v32[0] >> 8) & 0xff] & 0x0000ff00) ^ + (U4[(state->v32[1] ) & 0xff] & 0x000000ff) ^ + round_key->v32[1]; + + tmp2 = (U4[(state->v32[3] >> 24)] & 0xff000000) ^ + (U4[(state->v32[0] >> 16) & 0xff] & 0x00ff0000) ^ + (U4[(state->v32[1] >> 8) & 0xff] & 0x0000ff00) ^ + (U4[(state->v32[2] ) & 0xff] & 0x000000ff) ^ + round_key->v32[2]; + + tmp3 = (U4[(state->v32[0] >> 24)] & 0xff000000) ^ + (U4[(state->v32[1] >> 16) & 0xff] & 0x00ff0000) ^ + (U4[(state->v32[2] >> 8) & 0xff] & 0x0000ff00) ^ + (U4[(state->v32[3] ) & 0xff] & 0x000000ff) ^ + round_key->v32[3]; +/* clang-format on */ +#endif /* WORDS_BIGENDIAN */ + + state->v32[0] = tmp0; + state->v32[1] = tmp1; + state->v32[2] = tmp2; + state->v32[3] = tmp3; +} + +#elif CPU_16 /* assume 16-bit word size on processor */ + +static inline void aes_round(v128_t *state, const v128_t *round_key) +{ + uint32_t column0, column1, column2, column3; + /* compute the columns of the output square in terms of the octets + of state, using the tables T0, T1, T2, T3 */ + + column0 = T0[state->v8[0]] ^ T1[state->v8[5]] ^ T2[state->v8[10]] ^ + T3[state->v8[15]]; + + column1 = T0[state->v8[4]] ^ T1[state->v8[9]] ^ T2[state->v8[14]] ^ + T3[state->v8[3]]; + + column2 = T0[state->v8[8]] ^ T1[state->v8[13]] ^ T2[state->v8[2]] ^ + T3[state->v8[7]]; + + column3 = T0[state->v8[12]] ^ T1[state->v8[1]] ^ T2[state->v8[6]] ^ + T3[state->v8[11]]; + + state->v32[0] = column0 ^ round_key->v32[0]; + state->v32[1] = column1 ^ round_key->v32[1]; + state->v32[2] = column2 ^ round_key->v32[2]; + state->v32[3] = column3 ^ round_key->v32[3]; +} + +static inline void aes_inv_round(v128_t *state, const v128_t *round_key) +{ + uint32_t column0, column1, column2, column3; + + /* compute the columns of the output square in terms of the octets + of state, using the tables U0, U1, U2, U3 */ + + column0 = U0[state->v8[0]] ^ U1[state->v8[5]] ^ U2[state->v8[10]] ^ + U3[state->v8[15]]; + + column1 = U0[state->v8[4]] ^ U1[state->v8[9]] ^ U2[state->v8[14]] ^ + U3[state->v8[3]]; + + column2 = U0[state->v8[8]] ^ U1[state->v8[13]] ^ U2[state->v8[2]] ^ + U3[state->v8[7]]; + + column3 = U0[state->v8[12]] ^ U1[state->v8[1]] ^ U2[state->v8[6]] ^ + U3[state->v8[11]]; + + state->v32[0] = column0 ^ round_key->v32[0]; + state->v32[1] = column1 ^ round_key->v32[1]; + state->v32[2] = column2 ^ round_key->v32[2]; + state->v32[3] = column3 ^ round_key->v32[3]; +} + +static inline void aes_final_round(v128_t *state, const v128_t *round_key) +{ + uint8_t tmp; + + /* byte substitutions and row shifts */ + /* first row - no shift */ + state->v8[0] = aes_sbox[state->v8[0]]; + state->v8[4] = aes_sbox[state->v8[4]]; + state->v8[8] = aes_sbox[state->v8[8]]; + state->v8[12] = aes_sbox[state->v8[12]]; + + /* second row - shift one left */ + tmp = aes_sbox[state->v8[1]]; + state->v8[1] = aes_sbox[state->v8[5]]; + state->v8[5] = aes_sbox[state->v8[9]]; + state->v8[9] = aes_sbox[state->v8[13]]; + state->v8[13] = tmp; + + /* third row - shift two left */ + tmp = aes_sbox[state->v8[10]]; + state->v8[10] = aes_sbox[state->v8[2]]; + state->v8[2] = tmp; + tmp = aes_sbox[state->v8[14]]; + state->v8[14] = aes_sbox[state->v8[6]]; + state->v8[6] = tmp; + + /* fourth row - shift three left */ + tmp = aes_sbox[state->v8[15]]; + state->v8[15] = aes_sbox[state->v8[11]]; + state->v8[11] = aes_sbox[state->v8[7]]; + state->v8[7] = aes_sbox[state->v8[3]]; + state->v8[3] = tmp; + + v128_xor_eq(state, round_key); +} + +static inline void aes_inv_final_round(v128_t *state, const v128_t *round_key) +{ + uint8_t tmp; + + /* byte substitutions and row shifts */ + /* first row - no shift */ + state->v8[0] = aes_inv_sbox[state->v8[0]]; + state->v8[4] = aes_inv_sbox[state->v8[4]]; + state->v8[8] = aes_inv_sbox[state->v8[8]]; + state->v8[12] = aes_inv_sbox[state->v8[12]]; + + /* second row - shift one left */ + tmp = aes_inv_sbox[state->v8[1]]; + state->v8[1] = aes_inv_sbox[state->v8[5]]; + state->v8[5] = aes_inv_sbox[state->v8[9]]; + state->v8[9] = aes_inv_sbox[state->v8[13]]; + state->v8[13] = tmp; + + /* third row - shift two left */ + tmp = aes_inv_sbox[state->v8[10]]; + state->v8[10] = aes_inv_sbox[state->v8[2]]; + state->v8[2] = tmp; + tmp = aes_inv_sbox[state->v8[14]]; + state->v8[14] = aes_inv_sbox[state->v8[6]]; + state->v8[6] = tmp; + + /* fourth row - shift three left */ + tmp = aes_inv_sbox[state->v8[15]]; + state->v8[15] = aes_inv_sbox[state->v8[11]]; + state->v8[11] = aes_inv_sbox[state->v8[7]]; + state->v8[7] = aes_inv_sbox[state->v8[3]]; + state->v8[3] = tmp; + + v128_xor_eq(state, round_key); +} + +#endif /* CPU type */ + +void srtp_aes_encrypt(v128_t *plaintext, const srtp_aes_expanded_key_t *exp_key) +{ + /* add in the subkey */ + v128_xor_eq(plaintext, &exp_key->round[0]); + + /* now do the rounds */ + aes_round(plaintext, &exp_key->round[1]); + aes_round(plaintext, &exp_key->round[2]); + aes_round(plaintext, &exp_key->round[3]); + aes_round(plaintext, &exp_key->round[4]); + aes_round(plaintext, &exp_key->round[5]); + aes_round(plaintext, &exp_key->round[6]); + aes_round(plaintext, &exp_key->round[7]); + aes_round(plaintext, &exp_key->round[8]); + aes_round(plaintext, &exp_key->round[9]); + if (exp_key->num_rounds == 10) { + aes_final_round(plaintext, &exp_key->round[10]); + } else if (exp_key->num_rounds == 12) { + aes_round(plaintext, &exp_key->round[10]); + aes_round(plaintext, &exp_key->round[11]); + aes_final_round(plaintext, &exp_key->round[12]); + } else if (exp_key->num_rounds == 14) { + aes_round(plaintext, &exp_key->round[10]); + aes_round(plaintext, &exp_key->round[11]); + aes_round(plaintext, &exp_key->round[12]); + aes_round(plaintext, &exp_key->round[13]); + aes_final_round(plaintext, &exp_key->round[14]); + } +} + +void srtp_aes_decrypt(v128_t *plaintext, const srtp_aes_expanded_key_t *exp_key) +{ + /* add in the subkey */ + v128_xor_eq(plaintext, &exp_key->round[0]); + + /* now do the rounds */ + aes_inv_round(plaintext, &exp_key->round[1]); + aes_inv_round(plaintext, &exp_key->round[2]); + aes_inv_round(plaintext, &exp_key->round[3]); + aes_inv_round(plaintext, &exp_key->round[4]); + aes_inv_round(plaintext, &exp_key->round[5]); + aes_inv_round(plaintext, &exp_key->round[6]); + aes_inv_round(plaintext, &exp_key->round[7]); + aes_inv_round(plaintext, &exp_key->round[8]); + aes_inv_round(plaintext, &exp_key->round[9]); + if (exp_key->num_rounds == 10) { + aes_inv_final_round(plaintext, &exp_key->round[10]); + } else if (exp_key->num_rounds == 12) { + aes_inv_round(plaintext, &exp_key->round[10]); + aes_inv_round(plaintext, &exp_key->round[11]); + aes_inv_final_round(plaintext, &exp_key->round[12]); + } else if (exp_key->num_rounds == 14) { + aes_inv_round(plaintext, &exp_key->round[10]); + aes_inv_round(plaintext, &exp_key->round[11]); + aes_inv_round(plaintext, &exp_key->round[12]); + aes_inv_round(plaintext, &exp_key->round[13]); + aes_inv_final_round(plaintext, &exp_key->round[14]); + } +} diff --git a/third_party/libsrtp/src/crypto/cipher/aes_gcm_mbedtls.c b/third_party/libsrtp/src/crypto/cipher/aes_gcm_mbedtls.c new file mode 100644 index 0000000000..d7d4b61cdf --- /dev/null +++ b/third_party/libsrtp/src/crypto/cipher/aes_gcm_mbedtls.c @@ -0,0 +1,412 @@ +/* + * aes_gcm_mbedtls.c + * + * AES Galois Counter Mode + * + * YongCheng Yang + * + */ + +/* + * + * Copyright (c) 2013-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif +#include <mbedtls/gcm.h> +#include "aes_gcm.h" +#include "alloc.h" +#include "err.h" /* for srtp_debug */ +#include "crypto_types.h" +#include "cipher_types.h" +#include "cipher_test_cases.h" + +srtp_debug_module_t srtp_mod_aes_gcm = { + 0, /* debugging is off by default */ + "aes gcm mbedtls" /* printable module name */ +}; + +/** + * SRTP IV Formation for AES-GCM + * https://tools.ietf.org/html/rfc7714#section-8.1 + * 0 0 0 0 0 0 0 0 0 0 1 1 + * 0 1 2 3 4 5 6 7 8 9 0 1 + * +--+--+--+--+--+--+--+--+--+--+--+--+ + * |00|00| SSRC | ROC | SEQ |---+ + * +--+--+--+--+--+--+--+--+--+--+--+--+ | + * | + * +--+--+--+--+--+--+--+--+--+--+--+--+ | + * | Encryption Salt |->(+) + * +--+--+--+--+--+--+--+--+--+--+--+--+ | + * | + * +--+--+--+--+--+--+--+--+--+--+--+--+ | + * | Initialization Vector |<--+ + * +--+--+--+--+--+--+--+--+--+--+--+--+ + * + * SRTCP IV Formation for AES-GCM + * https://tools.ietf.org/html/rfc7714#section-9.1 + * + */ + +/* + * For now we only support 8 and 16 octet tags. The spec allows for + * optional 12 byte tag, which may be supported in the future. + */ +#define GCM_IV_LEN 12 +#define GCM_AUTH_TAG_LEN 16 +#define GCM_AUTH_TAG_LEN_8 8 + +#define FUNC_ENTRY() debug_print(srtp_mod_aes_gcm, "%s entry", __func__); +/* + * This function allocates a new instance of this crypto engine. + * The key_len parameter should be one of 28 or 44 for + * AES-128-GCM or AES-256-GCM respectively. Note that the + * key length includes the 14 byte salt value that is used when + * initializing the KDF. + */ +static srtp_err_status_t srtp_aes_gcm_mbedtls_alloc(srtp_cipher_t **c, + int key_len, + int tlen) +{ + FUNC_ENTRY(); + srtp_aes_gcm_ctx_t *gcm; + + debug_print(srtp_mod_aes_gcm, "allocating cipher with key length %d", + key_len); + debug_print(srtp_mod_aes_gcm, "allocating cipher with tag length %d", tlen); + + /* + * Verify the key_len is valid for one of: AES-128/256 + */ + if (key_len != SRTP_AES_GCM_128_KEY_LEN_WSALT && + key_len != SRTP_AES_GCM_256_KEY_LEN_WSALT) { + return (srtp_err_status_bad_param); + } + + if (tlen != GCM_AUTH_TAG_LEN && tlen != GCM_AUTH_TAG_LEN_8) { + return (srtp_err_status_bad_param); + } + + /* allocate memory a cipher of type aes_gcm */ + *c = (srtp_cipher_t *)srtp_crypto_alloc(sizeof(srtp_cipher_t)); + if (*c == NULL) { + return (srtp_err_status_alloc_fail); + } + + gcm = (srtp_aes_gcm_ctx_t *)srtp_crypto_alloc(sizeof(srtp_aes_gcm_ctx_t)); + if (gcm == NULL) { + srtp_crypto_free(*c); + *c = NULL; + return (srtp_err_status_alloc_fail); + } + + gcm->ctx = + (mbedtls_gcm_context *)srtp_crypto_alloc(sizeof(mbedtls_gcm_context)); + if (gcm->ctx == NULL) { + srtp_crypto_free(gcm); + srtp_crypto_free(*c); + *c = NULL; + return srtp_err_status_alloc_fail; + } + mbedtls_gcm_init(gcm->ctx); + + /* set pointers */ + (*c)->state = gcm; + + /* setup cipher attributes */ + switch (key_len) { + case SRTP_AES_GCM_128_KEY_LEN_WSALT: + (*c)->type = &srtp_aes_gcm_128; + (*c)->algorithm = SRTP_AES_GCM_128; + gcm->key_size = SRTP_AES_128_KEY_LEN; + gcm->tag_len = tlen; + break; + case SRTP_AES_GCM_256_KEY_LEN_WSALT: + (*c)->type = &srtp_aes_gcm_256; + (*c)->algorithm = SRTP_AES_GCM_256; + gcm->key_size = SRTP_AES_256_KEY_LEN; + gcm->tag_len = tlen; + break; + } + + /* set key size */ + (*c)->key_len = key_len; + + return (srtp_err_status_ok); +} + +/* + * This function deallocates a GCM session + */ +static srtp_err_status_t srtp_aes_gcm_mbedtls_dealloc(srtp_cipher_t *c) +{ + srtp_aes_gcm_ctx_t *ctx; + FUNC_ENTRY(); + ctx = (srtp_aes_gcm_ctx_t *)c->state; + if (ctx) { + mbedtls_gcm_free(ctx->ctx); + srtp_crypto_free(ctx->ctx); + /* zeroize the key material */ + octet_string_set_to_zero(ctx, sizeof(srtp_aes_gcm_ctx_t)); + srtp_crypto_free(ctx); + } + + /* free memory */ + srtp_crypto_free(c); + + return (srtp_err_status_ok); +} + +static srtp_err_status_t srtp_aes_gcm_mbedtls_context_init(void *cv, + const uint8_t *key) +{ + FUNC_ENTRY(); + srtp_aes_gcm_ctx_t *c = (srtp_aes_gcm_ctx_t *)cv; + uint32_t key_len_in_bits; + int errCode = 0; + c->dir = srtp_direction_any; + c->aad_size = 0; + + debug_print(srtp_mod_aes_gcm, "key: %s", + srtp_octet_string_hex_string(key, c->key_size)); + key_len_in_bits = (c->key_size << 3); + switch (c->key_size) { + case SRTP_AES_256_KEY_LEN: + case SRTP_AES_128_KEY_LEN: + break; + default: + return (srtp_err_status_bad_param); + break; + } + + errCode = mbedtls_gcm_setkey(c->ctx, MBEDTLS_CIPHER_ID_AES, + (const unsigned char *)key, key_len_in_bits); + if (errCode != 0) { + debug_print(srtp_mod_aes_gcm, "mbedtls error code: %d", errCode); + return srtp_err_status_init_fail; + } + + return (srtp_err_status_ok); +} + +static srtp_err_status_t srtp_aes_gcm_mbedtls_set_iv( + void *cv, + uint8_t *iv, + srtp_cipher_direction_t direction) +{ + FUNC_ENTRY(); + srtp_aes_gcm_ctx_t *c = (srtp_aes_gcm_ctx_t *)cv; + + if (direction != srtp_direction_encrypt && + direction != srtp_direction_decrypt) { + return (srtp_err_status_bad_param); + } + c->dir = direction; + + debug_print(srtp_mod_aes_gcm, "setting iv: %s", + srtp_octet_string_hex_string(iv, GCM_IV_LEN)); + c->iv_len = GCM_IV_LEN; + memcpy(c->iv, iv, c->iv_len); + return (srtp_err_status_ok); +} + +/* + * This function processes the AAD + * + * Parameters: + * c Crypto context + * aad Additional data to process for AEAD cipher suites + * aad_len length of aad buffer + */ +static srtp_err_status_t srtp_aes_gcm_mbedtls_set_aad(void *cv, + const uint8_t *aad, + uint32_t aad_len) +{ + FUNC_ENTRY(); + int errCode = 0; + srtp_aes_gcm_ctx_t *c = (srtp_aes_gcm_ctx_t *)cv; + + debug_print(srtp_mod_aes_gcm, "setting AAD: %s", + srtp_octet_string_hex_string(aad, aad_len)); + + if (aad_len + c->aad_size > MAX_AD_SIZE) { + return srtp_err_status_bad_param; + } + + memcpy(c->aad + c->aad_size, aad, aad_len); + c->aad_size += aad_len; + + return (srtp_err_status_ok); +} + +/* + * This function encrypts a buffer using AES GCM mode + * + * Parameters: + * c Crypto context + * buf data to encrypt + * enc_len length of encrypt buffer + */ +static srtp_err_status_t srtp_aes_gcm_mbedtls_encrypt(void *cv, + unsigned char *buf, + unsigned int *enc_len) +{ + FUNC_ENTRY(); + srtp_aes_gcm_ctx_t *c = (srtp_aes_gcm_ctx_t *)cv; + int errCode = 0; + + if (c->dir != srtp_direction_encrypt && c->dir != srtp_direction_decrypt) { + return (srtp_err_status_bad_param); + } + + errCode = mbedtls_gcm_crypt_and_tag(c->ctx, MBEDTLS_GCM_ENCRYPT, *enc_len, + c->iv, c->iv_len, c->aad, c->aad_size, + buf, buf, c->tag_len, c->tag); + + c->aad_size = 0; + if (errCode != 0) { + debug_print(srtp_mod_aes_gcm, "mbedtls error code: %d", errCode); + return srtp_err_status_bad_param; + } + + return (srtp_err_status_ok); +} + +/* + * This function calculates and returns the GCM tag for a given context. + * This should be called after encrypting the data. The *len value + * is increased by the tag size. The caller must ensure that *buf has + * enough room to accept the appended tag. + * + * Parameters: + * c Crypto context + * buf data to encrypt + * len length of encrypt buffer + */ +static srtp_err_status_t srtp_aes_gcm_mbedtls_get_tag(void *cv, + uint8_t *buf, + uint32_t *len) +{ + FUNC_ENTRY(); + srtp_aes_gcm_ctx_t *c = (srtp_aes_gcm_ctx_t *)cv; + debug_print(srtp_mod_aes_gcm, "appended tag size: %d", c->tag_len); + *len = c->tag_len; + memcpy(buf, c->tag, c->tag_len); + return (srtp_err_status_ok); +} + +/* + * This function decrypts a buffer using AES GCM mode + * + * Parameters: + * c Crypto context + * buf data to encrypt + * enc_len length of encrypt buffer + */ +static srtp_err_status_t srtp_aes_gcm_mbedtls_decrypt(void *cv, + unsigned char *buf, + unsigned int *enc_len) +{ + FUNC_ENTRY(); + srtp_aes_gcm_ctx_t *c = (srtp_aes_gcm_ctx_t *)cv; + int errCode = 0; + int len = *enc_len; + + if (c->dir != srtp_direction_encrypt && c->dir != srtp_direction_decrypt) { + return (srtp_err_status_bad_param); + } + + debug_print(srtp_mod_aes_gcm, "AAD: %s", + srtp_octet_string_hex_string(c->aad, c->aad_size)); + + errCode = mbedtls_gcm_auth_decrypt( + c->ctx, (*enc_len - c->tag_len), c->iv, c->iv_len, c->aad, c->aad_size, + buf + (*enc_len - c->tag_len), c->tag_len, buf, buf); + c->aad_size = 0; + if (errCode != 0) { + return (srtp_err_status_auth_fail); + } + + /* + * Reduce the buffer size by the tag length since the tag + * is not part of the original payload + */ + *enc_len -= c->tag_len; + + return (srtp_err_status_ok); +} + +/* + * Name of this crypto engine + */ +static const char srtp_aes_gcm_128_mbedtls_description[] = + "AES-128 GCM using mbedtls"; +static const char srtp_aes_gcm_256_mbedtls_description[] = + "AES-256 GCM using mbedtls"; + +/* + * This is the vector function table for this crypto engine. + */ +const srtp_cipher_type_t srtp_aes_gcm_128 = { + srtp_aes_gcm_mbedtls_alloc, + srtp_aes_gcm_mbedtls_dealloc, + srtp_aes_gcm_mbedtls_context_init, + srtp_aes_gcm_mbedtls_set_aad, + srtp_aes_gcm_mbedtls_encrypt, + srtp_aes_gcm_mbedtls_decrypt, + srtp_aes_gcm_mbedtls_set_iv, + srtp_aes_gcm_mbedtls_get_tag, + srtp_aes_gcm_128_mbedtls_description, + &srtp_aes_gcm_128_test_case_0, + SRTP_AES_GCM_128 +}; + +/* + * This is the vector function table for this crypto engine. + */ +const srtp_cipher_type_t srtp_aes_gcm_256 = { + srtp_aes_gcm_mbedtls_alloc, + srtp_aes_gcm_mbedtls_dealloc, + srtp_aes_gcm_mbedtls_context_init, + srtp_aes_gcm_mbedtls_set_aad, + srtp_aes_gcm_mbedtls_encrypt, + srtp_aes_gcm_mbedtls_decrypt, + srtp_aes_gcm_mbedtls_set_iv, + srtp_aes_gcm_mbedtls_get_tag, + srtp_aes_gcm_256_mbedtls_description, + &srtp_aes_gcm_256_test_case_0, + SRTP_AES_GCM_256 +}; diff --git a/third_party/libsrtp/src/crypto/cipher/aes_gcm_nss.c b/third_party/libsrtp/src/crypto/cipher/aes_gcm_nss.c new file mode 100644 index 0000000000..23b6e0946a --- /dev/null +++ b/third_party/libsrtp/src/crypto/cipher/aes_gcm_nss.c @@ -0,0 +1,442 @@ +/* + * aes_gcm_nss.c + * + * AES Galois Counter Mode + * + * Richard L. Barnes + * Cisco Systems, Inc. + * + */ + +/* + * + * Copyright (c) 2013-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "aes_gcm.h" +#include "alloc.h" +#include "err.h" /* for srtp_debug */ +#include "crypto_types.h" +#include "cipher_types.h" +#include "cipher_test_cases.h" +#include <secerr.h> +#include <nspr.h> + +srtp_debug_module_t srtp_mod_aes_gcm = { + 0, /* debugging is off by default */ + "aes gcm nss" /* printable module name */ +}; + +/* + * For now we only support 8 and 16 octet tags. The spec allows for + * optional 12 byte tag, which may be supported in the future. + */ +#define GCM_IV_LEN 12 +#define GCM_AUTH_TAG_LEN 16 +#define GCM_AUTH_TAG_LEN_8 8 + +/* + * This function allocates a new instance of this crypto engine. + * The key_len parameter should be one of 28 or 44 for + * AES-128-GCM or AES-256-GCM respectively. Note that the + * key length includes the 14 byte salt value that is used when + * initializing the KDF. + */ +static srtp_err_status_t srtp_aes_gcm_nss_alloc(srtp_cipher_t **c, + int key_len, + int tlen) +{ + srtp_aes_gcm_ctx_t *gcm; + NSSInitContext *nss; + + debug_print(srtp_mod_aes_gcm, "allocating cipher with key length %d", + key_len); + debug_print(srtp_mod_aes_gcm, "allocating cipher with tag length %d", tlen); + + /* + * Verify the key_len is valid for one of: AES-128/256 + */ + if (key_len != SRTP_AES_GCM_128_KEY_LEN_WSALT && + key_len != SRTP_AES_GCM_256_KEY_LEN_WSALT) { + return (srtp_err_status_bad_param); + } + + if (tlen != GCM_AUTH_TAG_LEN && tlen != GCM_AUTH_TAG_LEN_8) { + return (srtp_err_status_bad_param); + } + + /* Initialize NSS equiv of NSS_NoDB_Init(NULL) */ + nss = NSS_InitContext("", "", "", "", NULL, + NSS_INIT_READONLY | NSS_INIT_NOCERTDB | + NSS_INIT_NOMODDB | NSS_INIT_FORCEOPEN | + NSS_INIT_OPTIMIZESPACE); + if (!nss) { + return (srtp_err_status_cipher_fail); + } + + /* allocate memory a cipher of type aes_gcm */ + *c = (srtp_cipher_t *)srtp_crypto_alloc(sizeof(srtp_cipher_t)); + if (*c == NULL) { + NSS_ShutdownContext(nss); + return (srtp_err_status_alloc_fail); + } + + gcm = (srtp_aes_gcm_ctx_t *)srtp_crypto_alloc(sizeof(srtp_aes_gcm_ctx_t)); + if (gcm == NULL) { + NSS_ShutdownContext(nss); + srtp_crypto_free(*c); + *c = NULL; + return (srtp_err_status_alloc_fail); + } + + gcm->nss = nss; + + /* set pointers */ + (*c)->state = gcm; + + /* setup cipher attributes */ + switch (key_len) { + case SRTP_AES_GCM_128_KEY_LEN_WSALT: + (*c)->type = &srtp_aes_gcm_128; + (*c)->algorithm = SRTP_AES_GCM_128; + gcm->key_size = SRTP_AES_128_KEY_LEN; + gcm->tag_size = tlen; + gcm->params.ulTagBits = 8 * tlen; + break; + case SRTP_AES_GCM_256_KEY_LEN_WSALT: + (*c)->type = &srtp_aes_gcm_256; + (*c)->algorithm = SRTP_AES_GCM_256; + gcm->key_size = SRTP_AES_256_KEY_LEN; + gcm->tag_size = tlen; + gcm->params.ulTagBits = 8 * tlen; + break; + default: + /* this should never hit, but to be sure... */ + return (srtp_err_status_bad_param); + } + + /* set key size and tag size*/ + (*c)->key_len = key_len; + + return (srtp_err_status_ok); +} + +/* + * This function deallocates a GCM session + */ +static srtp_err_status_t srtp_aes_gcm_nss_dealloc(srtp_cipher_t *c) +{ + srtp_aes_gcm_ctx_t *ctx; + + ctx = (srtp_aes_gcm_ctx_t *)c->state; + if (ctx) { + /* release NSS resources */ + if (ctx->key) { + PK11_FreeSymKey(ctx->key); + } + + if (ctx->nss) { + NSS_ShutdownContext(ctx->nss); + ctx->nss = NULL; + } + + /* zeroize the key material */ + octet_string_set_to_zero(ctx, sizeof(srtp_aes_gcm_ctx_t)); + srtp_crypto_free(ctx); + } + + /* free memory */ + srtp_crypto_free(c); + + return (srtp_err_status_ok); +} + +/* + * aes_gcm_nss_context_init(...) initializes the aes_gcm_context + * using the value in key[]. + * + * the key is the secret key + */ +static srtp_err_status_t srtp_aes_gcm_nss_context_init(void *cv, + const uint8_t *key) +{ + srtp_aes_gcm_ctx_t *c = (srtp_aes_gcm_ctx_t *)cv; + + c->dir = srtp_direction_any; + + debug_print(srtp_mod_aes_gcm, "key: %s", + srtp_octet_string_hex_string(key, c->key_size)); + + if (c->key) { + PK11_FreeSymKey(c->key); + c->key = NULL; + } + + PK11SlotInfo *slot = PK11_GetBestSlot(CKM_AES_GCM, NULL); + if (!slot) { + return (srtp_err_status_cipher_fail); + } + + SECItem key_item = { siBuffer, (unsigned char *)key, c->key_size }; + c->key = PK11_ImportSymKey(slot, CKM_AES_GCM, PK11_OriginUnwrap, + CKA_ENCRYPT, &key_item, NULL); + PK11_FreeSlot(slot); + + if (!c->key) { + return (srtp_err_status_cipher_fail); + } + + return (srtp_err_status_ok); +} + +/* + * aes_gcm_nss_set_iv(c, iv) sets the counter value to the exor of iv with + * the offset + */ +static srtp_err_status_t srtp_aes_gcm_nss_set_iv( + void *cv, + uint8_t *iv, + srtp_cipher_direction_t direction) +{ + srtp_aes_gcm_ctx_t *c = (srtp_aes_gcm_ctx_t *)cv; + + if (direction != srtp_direction_encrypt && + direction != srtp_direction_decrypt) { + return (srtp_err_status_bad_param); + } + c->dir = direction; + + debug_print(srtp_mod_aes_gcm, "setting iv: %s", + srtp_octet_string_hex_string(iv, GCM_IV_LEN)); + + memcpy(c->iv, iv, GCM_IV_LEN); + + return (srtp_err_status_ok); +} + +/* + * This function processes the AAD + * + * Parameters: + * c Crypto context + * aad Additional data to process for AEAD cipher suites + * aad_len length of aad buffer + */ +static srtp_err_status_t srtp_aes_gcm_nss_set_aad(void *cv, + const uint8_t *aad, + uint32_t aad_len) +{ + srtp_aes_gcm_ctx_t *c = (srtp_aes_gcm_ctx_t *)cv; + + debug_print(srtp_mod_aes_gcm, "setting AAD: %s", + srtp_octet_string_hex_string(aad, aad_len)); + + if (aad_len + c->aad_size > MAX_AD_SIZE) { + return srtp_err_status_bad_param; + } + + memcpy(c->aad + c->aad_size, aad, aad_len); + c->aad_size += aad_len; + + return (srtp_err_status_ok); +} + +static srtp_err_status_t srtp_aes_gcm_nss_do_crypto(void *cv, + int encrypt, + unsigned char *buf, + unsigned int *enc_len) +{ + srtp_aes_gcm_ctx_t *c = (srtp_aes_gcm_ctx_t *)cv; + + c->params.pIv = c->iv; + c->params.ulIvLen = GCM_IV_LEN; + c->params.pAAD = c->aad; + c->params.ulAADLen = c->aad_size; + + // Reset AAD + c->aad_size = 0; + + int rv; + SECItem param = { siBuffer, (unsigned char *)&c->params, + sizeof(CK_GCM_PARAMS) }; + if (encrypt) { + rv = PK11_Encrypt(c->key, CKM_AES_GCM, ¶m, buf, enc_len, + *enc_len + 16, buf, *enc_len); + } else { + rv = PK11_Decrypt(c->key, CKM_AES_GCM, ¶m, buf, enc_len, *enc_len, + buf, *enc_len); + } + + srtp_err_status_t status = (srtp_err_status_ok); + if (rv != SECSuccess) { + status = (srtp_err_status_cipher_fail); + } + + return status; +} + +/* + * This function encrypts a buffer using AES GCM mode + * + * XXX(rlb@ipv.sx): We're required to break off and cache the tag + * here, because the get_tag() method is separate and the tests expect + * encrypt() not to change the size of the plaintext. It might be + * good to update the calling API so that this is cleaner. + * + * Parameters: + * c Crypto context + * buf data to encrypt + * enc_len length of encrypt buffer + */ +static srtp_err_status_t srtp_aes_gcm_nss_encrypt(void *cv, + unsigned char *buf, + unsigned int *enc_len) +{ + srtp_aes_gcm_ctx_t *c = (srtp_aes_gcm_ctx_t *)cv; + + // When we get a non-NULL buffer, we know that the caller is + // prepared to also take the tag. When we get a NULL buffer, + // even though there's no data, we need to give NSS a buffer + // where it can write the tag. We can't just use c->tag because + // memcpy has undefined behavior on overlapping ranges. + unsigned char tagbuf[16]; + unsigned char *non_null_buf = buf; + if (!non_null_buf && (*enc_len == 0)) { + non_null_buf = tagbuf; + } else if (!non_null_buf) { + return srtp_err_status_bad_param; + } + + srtp_err_status_t status = + srtp_aes_gcm_nss_do_crypto(cv, 1, non_null_buf, enc_len); + if (status != srtp_err_status_ok) { + return status; + } + + memcpy(c->tag, non_null_buf + (*enc_len - c->tag_size), c->tag_size); + *enc_len -= c->tag_size; + return srtp_err_status_ok; +} + +/* + * This function calculates and returns the GCM tag for a given context. + * This should be called after encrypting the data. The *len value + * is increased by the tag size. The caller must ensure that *buf has + * enough room to accept the appended tag. + * + * Parameters: + * c Crypto context + * buf data to encrypt + * len length of encrypt buffer + */ +static srtp_err_status_t srtp_aes_gcm_nss_get_tag(void *cv, + uint8_t *buf, + uint32_t *len) +{ + srtp_aes_gcm_ctx_t *c = (srtp_aes_gcm_ctx_t *)cv; + *len = c->tag_size; + memcpy(buf, c->tag, c->tag_size); + return (srtp_err_status_ok); +} + +/* + * This function decrypts a buffer using AES GCM mode + * + * Parameters: + * c Crypto context + * buf data to encrypt + * enc_len length of encrypt buffer + */ +static srtp_err_status_t srtp_aes_gcm_nss_decrypt(void *cv, + unsigned char *buf, + unsigned int *enc_len) +{ + srtp_err_status_t status = srtp_aes_gcm_nss_do_crypto(cv, 0, buf, enc_len); + if (status != srtp_err_status_ok) { + int err = PR_GetError(); + if (err == SEC_ERROR_BAD_DATA) { + status = srtp_err_status_auth_fail; + } + } + + return status; +} + +/* + * Name of this crypto engine + */ +static const char srtp_aes_gcm_128_nss_description[] = "AES-128 GCM using NSS"; +static const char srtp_aes_gcm_256_nss_description[] = "AES-256 GCM using NSS"; + +/* + * This is the vector function table for this crypto engine. + */ +/* clang-format off */ +const srtp_cipher_type_t srtp_aes_gcm_128 = { + srtp_aes_gcm_nss_alloc, + srtp_aes_gcm_nss_dealloc, + srtp_aes_gcm_nss_context_init, + srtp_aes_gcm_nss_set_aad, + srtp_aes_gcm_nss_encrypt, + srtp_aes_gcm_nss_decrypt, + srtp_aes_gcm_nss_set_iv, + srtp_aes_gcm_nss_get_tag, + srtp_aes_gcm_128_nss_description, + &srtp_aes_gcm_128_test_case_0, + SRTP_AES_GCM_128 +}; +/* clang-format on */ + +/* + * This is the vector function table for this crypto engine. + */ +/* clang-format off */ +const srtp_cipher_type_t srtp_aes_gcm_256 = { + srtp_aes_gcm_nss_alloc, + srtp_aes_gcm_nss_dealloc, + srtp_aes_gcm_nss_context_init, + srtp_aes_gcm_nss_set_aad, + srtp_aes_gcm_nss_encrypt, + srtp_aes_gcm_nss_decrypt, + srtp_aes_gcm_nss_set_iv, + srtp_aes_gcm_nss_get_tag, + srtp_aes_gcm_256_nss_description, + &srtp_aes_gcm_256_test_case_0, + SRTP_AES_GCM_256 +}; +/* clang-format on */ diff --git a/third_party/libsrtp/src/crypto/cipher/aes_gcm_ossl.c b/third_party/libsrtp/src/crypto/cipher/aes_gcm_ossl.c new file mode 100644 index 0000000000..3e2d6bb113 --- /dev/null +++ b/third_party/libsrtp/src/crypto/cipher/aes_gcm_ossl.c @@ -0,0 +1,428 @@ +/* + * aes_gcm_ossl.c + * + * AES Galois Counter Mode + * + * John A. Foley + * Cisco Systems, Inc. + * + */ + +/* + * + * Copyright (c) 2013-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <openssl/evp.h> +#include "aes_gcm.h" +#include "alloc.h" +#include "err.h" /* for srtp_debug */ +#include "crypto_types.h" +#include "cipher_types.h" +#include "cipher_test_cases.h" + +srtp_debug_module_t srtp_mod_aes_gcm = { + 0, /* debugging is off by default */ + "aes gcm" /* printable module name */ +}; + +/* + * For now we only support 8 and 16 octet tags. The spec allows for + * optional 12 byte tag, which may be supported in the future. + */ +#define GCM_AUTH_TAG_LEN 16 +#define GCM_AUTH_TAG_LEN_8 8 + +/* + * This function allocates a new instance of this crypto engine. + * The key_len parameter should be one of 28 or 44 for + * AES-128-GCM or AES-256-GCM respectively. Note that the + * key length includes the 14 byte salt value that is used when + * initializing the KDF. + */ +static srtp_err_status_t srtp_aes_gcm_openssl_alloc(srtp_cipher_t **c, + int key_len, + int tlen) +{ + srtp_aes_gcm_ctx_t *gcm; + + debug_print(srtp_mod_aes_gcm, "allocating cipher with key length %d", + key_len); + debug_print(srtp_mod_aes_gcm, "allocating cipher with tag length %d", tlen); + + /* + * Verify the key_len is valid for one of: AES-128/256 + */ + if (key_len != SRTP_AES_GCM_128_KEY_LEN_WSALT && + key_len != SRTP_AES_GCM_256_KEY_LEN_WSALT) { + return (srtp_err_status_bad_param); + } + + if (tlen != GCM_AUTH_TAG_LEN && tlen != GCM_AUTH_TAG_LEN_8) { + return (srtp_err_status_bad_param); + } + + /* allocate memory a cipher of type aes_gcm */ + *c = (srtp_cipher_t *)srtp_crypto_alloc(sizeof(srtp_cipher_t)); + if (*c == NULL) { + return (srtp_err_status_alloc_fail); + } + + gcm = (srtp_aes_gcm_ctx_t *)srtp_crypto_alloc(sizeof(srtp_aes_gcm_ctx_t)); + if (gcm == NULL) { + srtp_crypto_free(*c); + *c = NULL; + return (srtp_err_status_alloc_fail); + } + + gcm->ctx = EVP_CIPHER_CTX_new(); + if (gcm->ctx == NULL) { + srtp_crypto_free(gcm); + srtp_crypto_free(*c); + *c = NULL; + return srtp_err_status_alloc_fail; + } + + /* set pointers */ + (*c)->state = gcm; + + /* setup cipher attributes */ + switch (key_len) { + case SRTP_AES_GCM_128_KEY_LEN_WSALT: + (*c)->type = &srtp_aes_gcm_128; + (*c)->algorithm = SRTP_AES_GCM_128; + gcm->key_size = SRTP_AES_128_KEY_LEN; + gcm->tag_len = tlen; + break; + case SRTP_AES_GCM_256_KEY_LEN_WSALT: + (*c)->type = &srtp_aes_gcm_256; + (*c)->algorithm = SRTP_AES_GCM_256; + gcm->key_size = SRTP_AES_256_KEY_LEN; + gcm->tag_len = tlen; + break; + } + + /* set key size */ + (*c)->key_len = key_len; + + return (srtp_err_status_ok); +} + +/* + * This function deallocates a GCM session + */ +static srtp_err_status_t srtp_aes_gcm_openssl_dealloc(srtp_cipher_t *c) +{ + srtp_aes_gcm_ctx_t *ctx; + + ctx = (srtp_aes_gcm_ctx_t *)c->state; + if (ctx) { + EVP_CIPHER_CTX_free(ctx->ctx); + /* zeroize the key material */ + octet_string_set_to_zero(ctx, sizeof(srtp_aes_gcm_ctx_t)); + srtp_crypto_free(ctx); + } + + /* free memory */ + srtp_crypto_free(c); + + return (srtp_err_status_ok); +} + +/* + * aes_gcm_openssl_context_init(...) initializes the aes_gcm_context + * using the value in key[]. + * + * the key is the secret key + */ +static srtp_err_status_t srtp_aes_gcm_openssl_context_init(void *cv, + const uint8_t *key) +{ + srtp_aes_gcm_ctx_t *c = (srtp_aes_gcm_ctx_t *)cv; + const EVP_CIPHER *evp; + + c->dir = srtp_direction_any; + + debug_print(srtp_mod_aes_gcm, "key: %s", + srtp_octet_string_hex_string(key, c->key_size)); + + switch (c->key_size) { + case SRTP_AES_256_KEY_LEN: + evp = EVP_aes_256_gcm(); + break; + case SRTP_AES_128_KEY_LEN: + evp = EVP_aes_128_gcm(); + break; + default: + return (srtp_err_status_bad_param); + break; + } + + EVP_CIPHER_CTX_cleanup(c->ctx); + if (!EVP_CipherInit_ex(c->ctx, evp, NULL, key, NULL, 0)) { + return (srtp_err_status_init_fail); + } + + return (srtp_err_status_ok); +} + +/* + * aes_gcm_openssl_set_iv(c, iv) sets the counter value to the exor of iv with + * the offset + */ +static srtp_err_status_t srtp_aes_gcm_openssl_set_iv( + void *cv, + uint8_t *iv, + srtp_cipher_direction_t direction) +{ + srtp_aes_gcm_ctx_t *c = (srtp_aes_gcm_ctx_t *)cv; + + if (direction != srtp_direction_encrypt && + direction != srtp_direction_decrypt) { + return (srtp_err_status_bad_param); + } + c->dir = direction; + + debug_print(srtp_mod_aes_gcm, "setting iv: %s", + srtp_octet_string_hex_string(iv, 12)); + + if (!EVP_CIPHER_CTX_ctrl(c->ctx, EVP_CTRL_GCM_SET_IVLEN, 12, 0)) { + return (srtp_err_status_init_fail); + } + + if (!EVP_CipherInit_ex(c->ctx, NULL, NULL, NULL, iv, + (c->dir == srtp_direction_encrypt ? 1 : 0))) { + return (srtp_err_status_init_fail); + } + + return (srtp_err_status_ok); +} + +/* + * This function processes the AAD + * + * Parameters: + * c Crypto context + * aad Additional data to process for AEAD cipher suites + * aad_len length of aad buffer + */ +static srtp_err_status_t srtp_aes_gcm_openssl_set_aad(void *cv, + const uint8_t *aad, + uint32_t aad_len) +{ + srtp_aes_gcm_ctx_t *c = (srtp_aes_gcm_ctx_t *)cv; + int rv; + + debug_print(srtp_mod_aes_gcm, "setting AAD: %s", + srtp_octet_string_hex_string(aad, aad_len)); + + /* + * EVP_CTRL_GCM_SET_TAG can only be used when decrypting + */ + if (c->dir == srtp_direction_decrypt) { + /* + * Set dummy tag, OpenSSL requires the Tag to be set before + * processing AAD + */ + + /* + * OpenSSL never write to address pointed by the last parameter of + * EVP_CIPHER_CTX_ctrl while EVP_CTRL_GCM_SET_TAG (in reality, + * OpenSSL copy its content to the context), so we can make + * aad read-only in this function and all its wrappers. + */ + unsigned char dummy_tag[GCM_AUTH_TAG_LEN]; + memset(dummy_tag, 0x0, GCM_AUTH_TAG_LEN); + if (!EVP_CIPHER_CTX_ctrl(c->ctx, EVP_CTRL_GCM_SET_TAG, c->tag_len, + &dummy_tag)) { + return (srtp_err_status_algo_fail); + } + } + + rv = EVP_Cipher(c->ctx, NULL, aad, aad_len); + if (rv != aad_len) { + return (srtp_err_status_algo_fail); + } else { + return (srtp_err_status_ok); + } +} + +/* + * This function encrypts a buffer using AES GCM mode + * + * Parameters: + * c Crypto context + * buf data to encrypt + * enc_len length of encrypt buffer + */ +static srtp_err_status_t srtp_aes_gcm_openssl_encrypt(void *cv, + unsigned char *buf, + unsigned int *enc_len) +{ + srtp_aes_gcm_ctx_t *c = (srtp_aes_gcm_ctx_t *)cv; + if (c->dir != srtp_direction_encrypt && c->dir != srtp_direction_decrypt) { + return (srtp_err_status_bad_param); + } + + /* + * Encrypt the data + */ + EVP_Cipher(c->ctx, buf, buf, *enc_len); + + return (srtp_err_status_ok); +} + +/* + * This function calculates and returns the GCM tag for a given context. + * This should be called after encrypting the data. The *len value + * is increased by the tag size. The caller must ensure that *buf has + * enough room to accept the appended tag. + * + * Parameters: + * c Crypto context + * buf data to encrypt + * len length of encrypt buffer + */ +static srtp_err_status_t srtp_aes_gcm_openssl_get_tag(void *cv, + uint8_t *buf, + uint32_t *len) +{ + srtp_aes_gcm_ctx_t *c = (srtp_aes_gcm_ctx_t *)cv; + /* + * Calculate the tag + */ + EVP_Cipher(c->ctx, NULL, NULL, 0); + + /* + * Retreive the tag + */ + if (!EVP_CIPHER_CTX_ctrl(c->ctx, EVP_CTRL_GCM_GET_TAG, c->tag_len, buf)) { + return (srtp_err_status_algo_fail); + } + + /* + * Increase encryption length by desired tag size + */ + *len = c->tag_len; + + return (srtp_err_status_ok); +} + +/* + * This function decrypts a buffer using AES GCM mode + * + * Parameters: + * c Crypto context + * buf data to encrypt + * enc_len length of encrypt buffer + */ +static srtp_err_status_t srtp_aes_gcm_openssl_decrypt(void *cv, + unsigned char *buf, + unsigned int *enc_len) +{ + srtp_aes_gcm_ctx_t *c = (srtp_aes_gcm_ctx_t *)cv; + if (c->dir != srtp_direction_encrypt && c->dir != srtp_direction_decrypt) { + return (srtp_err_status_bad_param); + } + + /* + * Set the tag before decrypting + */ + if (!EVP_CIPHER_CTX_ctrl(c->ctx, EVP_CTRL_GCM_SET_TAG, c->tag_len, + buf + (*enc_len - c->tag_len))) { + return (srtp_err_status_auth_fail); + } + EVP_Cipher(c->ctx, buf, buf, *enc_len - c->tag_len); + + /* + * Check the tag + */ + if (EVP_Cipher(c->ctx, NULL, NULL, 0)) { + return (srtp_err_status_auth_fail); + } + + /* + * Reduce the buffer size by the tag length since the tag + * is not part of the original payload + */ + *enc_len -= c->tag_len; + + return (srtp_err_status_ok); +} + +/* + * Name of this crypto engine + */ +static const char srtp_aes_gcm_128_openssl_description[] = + "AES-128 GCM using openssl"; +static const char srtp_aes_gcm_256_openssl_description[] = + "AES-256 GCM using openssl"; + +/* + * This is the vector function table for this crypto engine. + */ +const srtp_cipher_type_t srtp_aes_gcm_128 = { + srtp_aes_gcm_openssl_alloc, + srtp_aes_gcm_openssl_dealloc, + srtp_aes_gcm_openssl_context_init, + srtp_aes_gcm_openssl_set_aad, + srtp_aes_gcm_openssl_encrypt, + srtp_aes_gcm_openssl_decrypt, + srtp_aes_gcm_openssl_set_iv, + srtp_aes_gcm_openssl_get_tag, + srtp_aes_gcm_128_openssl_description, + &srtp_aes_gcm_128_test_case_0, + SRTP_AES_GCM_128 +}; + +/* + * This is the vector function table for this crypto engine. + */ +const srtp_cipher_type_t srtp_aes_gcm_256 = { + srtp_aes_gcm_openssl_alloc, + srtp_aes_gcm_openssl_dealloc, + srtp_aes_gcm_openssl_context_init, + srtp_aes_gcm_openssl_set_aad, + srtp_aes_gcm_openssl_encrypt, + srtp_aes_gcm_openssl_decrypt, + srtp_aes_gcm_openssl_set_iv, + srtp_aes_gcm_openssl_get_tag, + srtp_aes_gcm_256_openssl_description, + &srtp_aes_gcm_256_test_case_0, + SRTP_AES_GCM_256 +}; diff --git a/third_party/libsrtp/src/crypto/cipher/aes_icm.c b/third_party/libsrtp/src/crypto/cipher/aes_icm.c new file mode 100644 index 0000000000..e05d9e45a3 --- /dev/null +++ b/third_party/libsrtp/src/crypto/cipher/aes_icm.c @@ -0,0 +1,433 @@ +/* + * aes_icm.c + * + * AES Integer Counter Mode + * + * David A. McGrew + * Cisco Systems, Inc. + */ + +/* + * + * Copyright (c) 2001-2017 Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#define ALIGN_32 0 + +#include "aes_icm.h" +#include "alloc.h" +#include "cipher_types.h" +#include "cipher_test_cases.h" + +srtp_debug_module_t srtp_mod_aes_icm = { + 0, /* debugging is off by default */ + "aes icm" /* printable module name */ +}; + +/* + * integer counter mode works as follows: + * + * 16 bits + * <-----> + * +------+------+------+------+------+------+------+------+ + * | nonce | pakcet index | ctr |---+ + * +------+------+------+------+------+------+------+------+ | + * | + * +------+------+------+------+------+------+------+------+ v + * | salt |000000|->(+) + * +------+------+------+------+------+------+------+------+ | + * | + * +---------+ + * | encrypt | + * +---------+ + * | + * +------+------+------+------+------+------+------+------+ | + * | keystream block |<--+ + * +------+------+------+------+------+------+------+------+ + * + * All fields are big-endian + * + * ctr is the block counter, which increments from zero for + * each packet (16 bits wide) + * + * packet index is distinct for each packet (48 bits wide) + * + * nonce can be distinct across many uses of the same key, or + * can be a fixed value per key, or can be per-packet randomness + * (64 bits) + * + */ + +static srtp_err_status_t srtp_aes_icm_alloc(srtp_cipher_t **c, + int key_len, + int tlen) +{ + srtp_aes_icm_ctx_t *icm; + + debug_print(srtp_mod_aes_icm, "allocating cipher with key length %d", + key_len); + + /* + * The check for key_len = 30/46 does not apply. Our usage + * of aes functions with key_len = values other than 30 + * has not broken anything. Don't know what would be the + * effect of skipping this check for srtp in general. + */ + if (key_len != SRTP_AES_ICM_128_KEY_LEN_WSALT && + key_len != SRTP_AES_ICM_256_KEY_LEN_WSALT) { + return srtp_err_status_bad_param; + } + + /* allocate memory a cipher of type aes_icm */ + *c = (srtp_cipher_t *)srtp_crypto_alloc(sizeof(srtp_cipher_t)); + if (*c == NULL) { + return srtp_err_status_alloc_fail; + } + + icm = (srtp_aes_icm_ctx_t *)srtp_crypto_alloc(sizeof(srtp_aes_icm_ctx_t)); + if (icm == NULL) { + srtp_crypto_free(*c); + *c = NULL; + return srtp_err_status_alloc_fail; + } + + /* set pointers */ + (*c)->state = icm; + + switch (key_len) { + case SRTP_AES_ICM_256_KEY_LEN_WSALT: + (*c)->algorithm = SRTP_AES_ICM_256; + (*c)->type = &srtp_aes_icm_256; + break; + default: + (*c)->algorithm = SRTP_AES_ICM_128; + (*c)->type = &srtp_aes_icm_128; + break; + } + + /* set key size */ + icm->key_size = key_len; + (*c)->key_len = key_len; + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_aes_icm_dealloc(srtp_cipher_t *c) +{ + srtp_aes_icm_ctx_t *ctx; + + if (c == NULL) { + return srtp_err_status_bad_param; + } + + ctx = (srtp_aes_icm_ctx_t *)c->state; + if (ctx) { + /* zeroize the key material */ + octet_string_set_to_zero(ctx, sizeof(srtp_aes_icm_ctx_t)); + srtp_crypto_free(ctx); + } + + /* free the cipher context */ + srtp_crypto_free(c); + + return srtp_err_status_ok; +} + +/* + * aes_icm_context_init(...) initializes the aes_icm_context + * using the value in key[]. + * + * the key is the secret key + * + * the salt is unpredictable (but not necessarily secret) data which + * randomizes the starting point in the keystream + */ + +static srtp_err_status_t srtp_aes_icm_context_init(void *cv, const uint8_t *key) +{ + srtp_aes_icm_ctx_t *c = (srtp_aes_icm_ctx_t *)cv; + srtp_err_status_t status; + int base_key_len, copy_len; + + if (c->key_size == SRTP_AES_ICM_128_KEY_LEN_WSALT || + c->key_size == SRTP_AES_ICM_256_KEY_LEN_WSALT) { + base_key_len = c->key_size - SRTP_SALT_LEN; + } else { + return srtp_err_status_bad_param; + } + + /* + * set counter and initial values to 'offset' value, being careful not to + * go past the end of the key buffer + */ + v128_set_to_zero(&c->counter); + v128_set_to_zero(&c->offset); + + copy_len = c->key_size - base_key_len; + /* force last two octets of the offset to be left zero (for srtp + * compatibility) */ + if (copy_len > SRTP_SALT_LEN) { + copy_len = SRTP_SALT_LEN; + } + + memcpy(&c->counter, key + base_key_len, copy_len); + memcpy(&c->offset, key + base_key_len, copy_len); + + debug_print(srtp_mod_aes_icm, "key: %s", + srtp_octet_string_hex_string(key, base_key_len)); + debug_print(srtp_mod_aes_icm, "offset: %s", v128_hex_string(&c->offset)); + + /* expand key */ + status = + srtp_aes_expand_encryption_key(key, base_key_len, &c->expanded_key); + if (status) { + v128_set_to_zero(&c->counter); + v128_set_to_zero(&c->offset); + return status; + } + + /* indicate that the keystream_buffer is empty */ + c->bytes_in_buffer = 0; + + return srtp_err_status_ok; +} + +/* + * aes_icm_set_iv(c, iv) sets the counter value to the exor of iv with + * the offset + */ + +static srtp_err_status_t srtp_aes_icm_set_iv(void *cv, + uint8_t *iv, + srtp_cipher_direction_t direction) +{ + srtp_aes_icm_ctx_t *c = (srtp_aes_icm_ctx_t *)cv; + v128_t nonce; + + /* set nonce (for alignment) */ + v128_copy_octet_string(&nonce, iv); + + debug_print(srtp_mod_aes_icm, "setting iv: %s", v128_hex_string(&nonce)); + + v128_xor(&c->counter, &c->offset, &nonce); + + debug_print(srtp_mod_aes_icm, "set_counter: %s", + v128_hex_string(&c->counter)); + + /* indicate that the keystream_buffer is empty */ + c->bytes_in_buffer = 0; + + return srtp_err_status_ok; +} + +/* + * aes_icm_advance(...) refills the keystream_buffer and + * advances the block index of the sicm_context forward by one + * + * this is an internal, hopefully inlined function + */ +static void srtp_aes_icm_advance(srtp_aes_icm_ctx_t *c) +{ + /* fill buffer with new keystream */ + v128_copy(&c->keystream_buffer, &c->counter); + srtp_aes_encrypt(&c->keystream_buffer, &c->expanded_key); + c->bytes_in_buffer = sizeof(v128_t); + + debug_print(srtp_mod_aes_icm, "counter: %s", + v128_hex_string(&c->counter)); + debug_print(srtp_mod_aes_icm, "ciphertext: %s", + v128_hex_string(&c->keystream_buffer)); + + /* clock counter forward */ + if (!++(c->counter.v8[15])) { + ++(c->counter.v8[14]); + } +} + +/* + * icm_encrypt deals with the following cases: + * + * bytes_to_encr < bytes_in_buffer + * - add keystream into data + * + * bytes_to_encr > bytes_in_buffer + * - add keystream into data until keystream_buffer is depleted + * - loop over blocks, filling keystream_buffer and then + * adding keystream into data + * - fill buffer then add in remaining (< 16) bytes of keystream + */ + +static srtp_err_status_t srtp_aes_icm_encrypt(void *cv, + unsigned char *buf, + unsigned int *enc_len) +{ + srtp_aes_icm_ctx_t *c = (srtp_aes_icm_ctx_t *)cv; + unsigned int bytes_to_encr = *enc_len; + unsigned int i; + uint32_t *b; + + /* check that there's enough segment left*/ + if ((bytes_to_encr + htons(c->counter.v16[7])) > 0xffff) { + return srtp_err_status_terminus; + } + + debug_print(srtp_mod_aes_icm, "block index: %d", htons(c->counter.v16[7])); + if (bytes_to_encr <= (unsigned int)c->bytes_in_buffer) { + /* deal with odd case of small bytes_to_encr */ + for (i = (sizeof(v128_t) - c->bytes_in_buffer); + i < (sizeof(v128_t) - c->bytes_in_buffer + bytes_to_encr); i++) { + *buf++ ^= c->keystream_buffer.v8[i]; + } + + c->bytes_in_buffer -= bytes_to_encr; + + /* return now to avoid the main loop */ + return srtp_err_status_ok; + + } else { + /* encrypt bytes until the remaining data is 16-byte aligned */ + for (i = (sizeof(v128_t) - c->bytes_in_buffer); i < sizeof(v128_t); + i++) { + *buf++ ^= c->keystream_buffer.v8[i]; + } + + bytes_to_encr -= c->bytes_in_buffer; + c->bytes_in_buffer = 0; + } + + /* now loop over entire 16-byte blocks of keystream */ + for (i = 0; i < (bytes_to_encr / sizeof(v128_t)); i++) { + /* fill buffer with new keystream */ + srtp_aes_icm_advance(c); + +/* + * add keystream into the data buffer (this would be a lot faster + * if we could assume 32-bit alignment!) + */ + +#if ALIGN_32 + b = (uint32_t *)buf; + *b++ ^= c->keystream_buffer.v32[0]; + *b++ ^= c->keystream_buffer.v32[1]; + *b++ ^= c->keystream_buffer.v32[2]; + *b++ ^= c->keystream_buffer.v32[3]; + buf = (uint8_t *)b; +#else + if ((((uintptr_t)buf) & 0x03) != 0) { + *buf++ ^= c->keystream_buffer.v8[0]; + *buf++ ^= c->keystream_buffer.v8[1]; + *buf++ ^= c->keystream_buffer.v8[2]; + *buf++ ^= c->keystream_buffer.v8[3]; + *buf++ ^= c->keystream_buffer.v8[4]; + *buf++ ^= c->keystream_buffer.v8[5]; + *buf++ ^= c->keystream_buffer.v8[6]; + *buf++ ^= c->keystream_buffer.v8[7]; + *buf++ ^= c->keystream_buffer.v8[8]; + *buf++ ^= c->keystream_buffer.v8[9]; + *buf++ ^= c->keystream_buffer.v8[10]; + *buf++ ^= c->keystream_buffer.v8[11]; + *buf++ ^= c->keystream_buffer.v8[12]; + *buf++ ^= c->keystream_buffer.v8[13]; + *buf++ ^= c->keystream_buffer.v8[14]; + *buf++ ^= c->keystream_buffer.v8[15]; + } else { + b = (uint32_t *)buf; + *b++ ^= c->keystream_buffer.v32[0]; + *b++ ^= c->keystream_buffer.v32[1]; + *b++ ^= c->keystream_buffer.v32[2]; + *b++ ^= c->keystream_buffer.v32[3]; + buf = (uint8_t *)b; + } +#endif /* #if ALIGN_32 */ + } + + /* if there is a tail end of the data, process it */ + if ((bytes_to_encr & 0xf) != 0) { + /* fill buffer with new keystream */ + srtp_aes_icm_advance(c); + + for (i = 0; i < (bytes_to_encr & 0xf); i++) { + *buf++ ^= c->keystream_buffer.v8[i]; + } + + /* reset the keystream buffer size to right value */ + c->bytes_in_buffer = sizeof(v128_t) - i; + } else { + /* no tail, so just reset the keystream buffer size to zero */ + c->bytes_in_buffer = 0; + } + + return srtp_err_status_ok; +} + +static const char srtp_aes_icm_128_description[] = + "AES-128 integer counter mode"; +static const char srtp_aes_icm_256_description[] = + "AES-256 integer counter mode"; + +/* + * note: the encrypt function is identical to the decrypt function + */ + +const srtp_cipher_type_t srtp_aes_icm_128 = { + srtp_aes_icm_alloc, /* */ + srtp_aes_icm_dealloc, /* */ + srtp_aes_icm_context_init, /* */ + 0, /* set_aad */ + srtp_aes_icm_encrypt, /* */ + srtp_aes_icm_encrypt, /* */ + srtp_aes_icm_set_iv, /* */ + 0, /* get_tag */ + srtp_aes_icm_128_description, /* */ + &srtp_aes_icm_128_test_case_0, /* */ + SRTP_AES_ICM_128 /* */ +}; + +const srtp_cipher_type_t srtp_aes_icm_256 = { + srtp_aes_icm_alloc, /* */ + srtp_aes_icm_dealloc, /* */ + srtp_aes_icm_context_init, /* */ + 0, /* set_aad */ + srtp_aes_icm_encrypt, /* */ + srtp_aes_icm_encrypt, /* */ + srtp_aes_icm_set_iv, /* */ + 0, /* get_tag */ + srtp_aes_icm_256_description, /* */ + &srtp_aes_icm_256_test_case_0, /* */ + SRTP_AES_ICM_256 /* */ +}; diff --git a/third_party/libsrtp/src/crypto/cipher/aes_icm_mbedtls.c b/third_party/libsrtp/src/crypto/cipher/aes_icm_mbedtls.c new file mode 100644 index 0000000000..9893ded702 --- /dev/null +++ b/third_party/libsrtp/src/crypto/cipher/aes_icm_mbedtls.c @@ -0,0 +1,371 @@ +/* + * aes_icm_mbedtls.c + * + * AES Integer Counter Mode + * + * YongCheng Yang + */ + +/* + * + * Copyright (c) 2013-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif +#include <mbedtls/aes.h> +#include "aes_icm_ext.h" +#include "crypto_types.h" +#include "err.h" /* for srtp_debug */ +#include "alloc.h" +#include "cipher_types.h" +#include "cipher_test_cases.h" + +srtp_debug_module_t srtp_mod_aes_icm = { + 0, /* debugging is off by default */ + "aes icm mbedtls" /* printable module name */ +}; + +/* + * integer counter mode works as follows: + * + * https://tools.ietf.org/html/rfc3711#section-4.1.1 + * + * E(k, IV) || E(k, IV + 1 mod 2^128) || E(k, IV + 2 mod 2^128) ... + * IV = (k_s * 2^16) XOR (SSRC * 2^64) XOR (i * 2^16) + * + * IV SHALL be defined by the SSRC, the SRTP packet index i, + * and the SRTP session salting key k_s. + * + * SSRC: 32bits. + * Sequence number: 16bits. + * nonce is 64bits. . + * packet index = ROC || SEQ. (ROC: Rollover counter) + * + * 16 bits + * <-----> + * +------+------+------+------+------+------+------+------+ + * | nonce | packet index | ctr |---+ + * +------+------+------+------+------+------+------+------+ | + * | + * +------+------+------+------+------+------+------+------+ v + * | salt |000000|->(+) + * +------+------+------+------+------+------+------+------+ | + * | + * +---------+ + * | encrypt | + * +---------+ + * | + * +------+------+------+------+------+------+------+------+ | + * | keystream block |<--+ + * +------+------+------+------+------+------+------+------+ + * + * All fields are big-endian + * + * ctr is the block counter, which increments from zero for + * each packet (16 bits wide) + * + * packet index is distinct for each packet (48 bits wide) + * + * nonce can be distinct across many uses of the same key, or + * can be a fixed value per key, or can be per-packet randomness + * (64 bits) + * + */ + +/* + * This function allocates a new instance of this crypto engine. + * The key_len parameter should be one of 30, 38, or 46 for + * AES-128, AES-192, and AES-256 respectively. Note, this key_len + * value is inflated, as it also accounts for the 112 bit salt + * value. The tlen argument is for the AEAD tag length, which + * isn't used in counter mode. + */ +static srtp_err_status_t srtp_aes_icm_mbedtls_alloc(srtp_cipher_t **c, + int key_len, + int tlen) +{ + srtp_aes_icm_ctx_t *icm; + + debug_print(srtp_mod_aes_icm, "allocating cipher with key length %d", + key_len); + + /* + * Verify the key_len is valid for one of: AES-128/192/256 + */ + if (key_len != SRTP_AES_ICM_128_KEY_LEN_WSALT && + key_len != SRTP_AES_ICM_192_KEY_LEN_WSALT && + key_len != SRTP_AES_ICM_256_KEY_LEN_WSALT) { + return srtp_err_status_bad_param; + } + + /* allocate memory a cipher of type aes_icm */ + *c = (srtp_cipher_t *)srtp_crypto_alloc(sizeof(srtp_cipher_t)); + if (*c == NULL) { + return srtp_err_status_alloc_fail; + } + + icm = (srtp_aes_icm_ctx_t *)srtp_crypto_alloc(sizeof(srtp_aes_icm_ctx_t)); + if (icm == NULL) { + srtp_crypto_free(*c); + *c = NULL; + return srtp_err_status_alloc_fail; + } + + icm->ctx = + (mbedtls_aes_context *)srtp_crypto_alloc(sizeof(mbedtls_aes_context)); + if (icm->ctx == NULL) { + srtp_crypto_free(icm); + srtp_crypto_free(*c); + *c = NULL; + return srtp_err_status_alloc_fail; + } + + mbedtls_aes_init(icm->ctx); + + /* set pointers */ + (*c)->state = icm; + + /* setup cipher parameters */ + switch (key_len) { + case SRTP_AES_ICM_128_KEY_LEN_WSALT: + (*c)->algorithm = SRTP_AES_ICM_128; + (*c)->type = &srtp_aes_icm_128; + icm->key_size = SRTP_AES_128_KEY_LEN; + break; + case SRTP_AES_ICM_192_KEY_LEN_WSALT: + (*c)->algorithm = SRTP_AES_ICM_192; + (*c)->type = &srtp_aes_icm_192; + icm->key_size = SRTP_AES_192_KEY_LEN; + break; + case SRTP_AES_ICM_256_KEY_LEN_WSALT: + (*c)->algorithm = SRTP_AES_ICM_256; + (*c)->type = &srtp_aes_icm_256; + icm->key_size = SRTP_AES_256_KEY_LEN; + break; + } + + /* set key size */ + (*c)->key_len = key_len; + + return srtp_err_status_ok; +} + +/* + * This function deallocates an instance of this engine + */ +static srtp_err_status_t srtp_aes_icm_mbedtls_dealloc(srtp_cipher_t *c) +{ + srtp_aes_icm_ctx_t *ctx; + + if (c == NULL) { + return srtp_err_status_bad_param; + } + + /* + * Free the aes context + */ + ctx = (srtp_aes_icm_ctx_t *)c->state; + if (ctx != NULL) { + mbedtls_aes_free(ctx->ctx); + srtp_crypto_free(ctx->ctx); + /* zeroize the key material */ + octet_string_set_to_zero(ctx, sizeof(srtp_aes_icm_ctx_t)); + srtp_crypto_free(ctx); + } + + /* free memory */ + srtp_crypto_free(c); + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_aes_icm_mbedtls_context_init(void *cv, + const uint8_t *key) +{ + srtp_aes_icm_ctx_t *c = (srtp_aes_icm_ctx_t *)cv; + uint32_t key_size_in_bits = (c->key_size << 3); + int errcode = 0; + + /* + * set counter and initial values to 'offset' value, being careful not to + * go past the end of the key buffer + */ + v128_set_to_zero(&c->counter); + v128_set_to_zero(&c->offset); + memcpy(&c->counter, key + c->key_size, SRTP_SALT_LEN); + memcpy(&c->offset, key + c->key_size, SRTP_SALT_LEN); + + /* force last two octets of the offset to zero (for srtp compatibility) */ + c->offset.v8[SRTP_SALT_LEN] = c->offset.v8[SRTP_SALT_LEN + 1] = 0; + c->counter.v8[SRTP_SALT_LEN] = c->counter.v8[SRTP_SALT_LEN + 1] = 0; + debug_print(srtp_mod_aes_icm, "key: %s", + srtp_octet_string_hex_string(key, c->key_size)); + debug_print(srtp_mod_aes_icm, "offset: %s", v128_hex_string(&c->offset)); + + switch (c->key_size) { + case SRTP_AES_256_KEY_LEN: + case SRTP_AES_192_KEY_LEN: + case SRTP_AES_128_KEY_LEN: + break; + default: + return srtp_err_status_bad_param; + break; + } + + errcode = mbedtls_aes_setkey_enc(c->ctx, key, key_size_in_bits); + if (errcode != 0) { + debug_print(srtp_mod_aes_icm, "errCode: %d", errcode); + } + + return srtp_err_status_ok; +} + +/* + * aes_icm_set_iv(c, iv) sets the counter value to the exor of iv with + * the offset + */ +static srtp_err_status_t srtp_aes_icm_mbedtls_set_iv( + void *cv, + uint8_t *iv, + srtp_cipher_direction_t dir) +{ + srtp_aes_icm_ctx_t *c = (srtp_aes_icm_ctx_t *)cv; + v128_t nonce; + c->nc_off = 0; + /* set nonce (for alignment) */ + v128_copy_octet_string(&nonce, iv); + + debug_print(srtp_mod_aes_icm, "setting iv: %s", v128_hex_string(&nonce)); + + v128_xor(&c->counter, &c->offset, &nonce); + + debug_print(srtp_mod_aes_icm, "set_counter: %s", + v128_hex_string(&c->counter)); + + return srtp_err_status_ok; +} + +/* + * This function encrypts a buffer using AES CTR mode + * + * Parameters: + * c Crypto context + * buf data to encrypt + * enc_len length of encrypt buffer + */ +static srtp_err_status_t srtp_aes_icm_mbedtls_encrypt(void *cv, + unsigned char *buf, + unsigned int *enc_len) +{ + srtp_aes_icm_ctx_t *c = (srtp_aes_icm_ctx_t *)cv; + + int errCode = 0; + debug_print(srtp_mod_aes_icm, "rs0: %s", v128_hex_string(&c->counter)); + + errCode = + mbedtls_aes_crypt_ctr(c->ctx, *enc_len, &(c->nc_off), c->counter.v8, + c->stream_block.v8, buf, buf); + if (errCode != 0) { + debug_print(srtp_mod_aes_icm, "encrypt error: %d", errCode); + return srtp_err_status_cipher_fail; + } + + return srtp_err_status_ok; +} + +/* + * Name of this crypto engine + */ +static const char srtp_aes_icm_128_mbedtls_description[] = + "AES-128 counter mode using mbedtls"; +static const char srtp_aes_icm_192_mbedtls_description[] = + "AES-192 counter mode using mbedtls"; +static const char srtp_aes_icm_256_mbedtls_description[] = + "AES-256 counter mode using mbedtls"; + +/* + * This is the function table for this crypto engine. + * note: the encrypt function is identical to the decrypt function + */ +const srtp_cipher_type_t srtp_aes_icm_128 = { + srtp_aes_icm_mbedtls_alloc, /* */ + srtp_aes_icm_mbedtls_dealloc, /* */ + srtp_aes_icm_mbedtls_context_init, /* */ + 0, /* set_aad */ + srtp_aes_icm_mbedtls_encrypt, /* */ + srtp_aes_icm_mbedtls_encrypt, /* */ + srtp_aes_icm_mbedtls_set_iv, /* */ + 0, /* get_tag */ + srtp_aes_icm_128_mbedtls_description, /* */ + &srtp_aes_icm_128_test_case_0, /* */ + SRTP_AES_ICM_128 /* */ +}; + +/* + * This is the function table for this crypto engine. + * note: the encrypt function is identical to the decrypt function + */ +const srtp_cipher_type_t srtp_aes_icm_192 = { + srtp_aes_icm_mbedtls_alloc, /* */ + srtp_aes_icm_mbedtls_dealloc, /* */ + srtp_aes_icm_mbedtls_context_init, /* */ + 0, /* set_aad */ + srtp_aes_icm_mbedtls_encrypt, /* */ + srtp_aes_icm_mbedtls_encrypt, /* */ + srtp_aes_icm_mbedtls_set_iv, /* */ + 0, /* get_tag */ + srtp_aes_icm_192_mbedtls_description, /* */ + &srtp_aes_icm_192_test_case_0, /* */ + SRTP_AES_ICM_192 /* */ +}; + +/* + * This is the function table for this crypto engine. + * note: the encrypt function is identical to the decrypt function + */ +const srtp_cipher_type_t srtp_aes_icm_256 = { + srtp_aes_icm_mbedtls_alloc, /* */ + srtp_aes_icm_mbedtls_dealloc, /* */ + srtp_aes_icm_mbedtls_context_init, /* */ + 0, /* set_aad */ + srtp_aes_icm_mbedtls_encrypt, /* */ + srtp_aes_icm_mbedtls_encrypt, /* */ + srtp_aes_icm_mbedtls_set_iv, /* */ + 0, /* get_tag */ + srtp_aes_icm_256_mbedtls_description, /* */ + &srtp_aes_icm_256_test_case_0, /* */ + SRTP_AES_ICM_256 /* */ +}; diff --git a/third_party/libsrtp/src/crypto/cipher/aes_icm_nss.c b/third_party/libsrtp/src/crypto/cipher/aes_icm_nss.c new file mode 100644 index 0000000000..04323b4fef --- /dev/null +++ b/third_party/libsrtp/src/crypto/cipher/aes_icm_nss.c @@ -0,0 +1,404 @@ +/* + * aes_icm_nss.c + * + * AES Integer Counter Mode + * + * Richard L. Barnes + * Cisco Systems, Inc. + */ + +/* + * + * Copyright (c) 2013-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "aes_icm_ext.h" +#include "crypto_types.h" +#include "err.h" /* for srtp_debug */ +#include "alloc.h" +#include "cipher_types.h" +#include "cipher_test_cases.h" + +srtp_debug_module_t srtp_mod_aes_icm = { + 0, /* debugging is off by default */ + "aes icm nss" /* printable module name */ +}; + +/* + * integer counter mode works as follows: + * + * 16 bits + * <-----> + * +------+------+------+------+------+------+------+------+ + * | nonce | packet index | ctr |---+ + * +------+------+------+------+------+------+------+------+ | + * | + * +------+------+------+------+------+------+------+------+ v + * | salt |000000|->(+) + * +------+------+------+------+------+------+------+------+ | + * | + * +---------+ + * | encrypt | + * +---------+ + * | + * +------+------+------+------+------+------+------+------+ | + * | keystream block |<--+ + * +------+------+------+------+------+------+------+------+ + * + * All fields are big-endian + * + * ctr is the block counter, which increments from zero for + * each packet (16 bits wide) + * + * packet index is distinct for each packet (48 bits wide) + * + * nonce can be distinct across many uses of the same key, or + * can be a fixed value per key, or can be per-packet randomness + * (64 bits) + * + */ + +/* + * This function allocates a new instance of this crypto engine. + * The key_len parameter should be one of 30, 38, or 46 for + * AES-128, AES-192, and AES-256 respectively. Note, this key_len + * value is inflated, as it also accounts for the 112 bit salt + * value. The tlen argument is for the AEAD tag length, which + * isn't used in counter mode. + */ +static srtp_err_status_t srtp_aes_icm_nss_alloc(srtp_cipher_t **c, + int key_len, + int tlen) +{ + srtp_aes_icm_ctx_t *icm; + NSSInitContext *nss; + + debug_print(srtp_mod_aes_icm, "allocating cipher with key length %d", + key_len); + + /* + * Verify the key_len is valid for one of: AES-128/192/256 + */ + if (key_len != SRTP_AES_ICM_128_KEY_LEN_WSALT && + key_len != SRTP_AES_ICM_192_KEY_LEN_WSALT && + key_len != SRTP_AES_ICM_256_KEY_LEN_WSALT) { + return srtp_err_status_bad_param; + } + + /* Initialize NSS equiv of NSS_NoDB_Init(NULL) */ + nss = NSS_InitContext("", "", "", "", NULL, + NSS_INIT_READONLY | NSS_INIT_NOCERTDB | + NSS_INIT_NOMODDB | NSS_INIT_FORCEOPEN | + NSS_INIT_OPTIMIZESPACE); + if (!nss) { + return (srtp_err_status_cipher_fail); + } + + /* allocate memory a cipher of type aes_icm */ + *c = (srtp_cipher_t *)srtp_crypto_alloc(sizeof(srtp_cipher_t)); + if (*c == NULL) { + NSS_ShutdownContext(nss); + return srtp_err_status_alloc_fail; + } + + icm = (srtp_aes_icm_ctx_t *)srtp_crypto_alloc(sizeof(srtp_aes_icm_ctx_t)); + if (icm == NULL) { + NSS_ShutdownContext(nss); + srtp_crypto_free(*c); + *c = NULL; + return srtp_err_status_alloc_fail; + } + + icm->key = NULL; + icm->ctx = NULL; + icm->nss = nss; + + /* set pointers */ + (*c)->state = icm; + + /* setup cipher parameters */ + switch (key_len) { + case SRTP_AES_ICM_128_KEY_LEN_WSALT: + (*c)->algorithm = SRTP_AES_ICM_128; + (*c)->type = &srtp_aes_icm_128; + icm->key_size = SRTP_AES_128_KEY_LEN; + break; + case SRTP_AES_ICM_192_KEY_LEN_WSALT: + (*c)->algorithm = SRTP_AES_ICM_192; + (*c)->type = &srtp_aes_icm_192; + icm->key_size = SRTP_AES_192_KEY_LEN; + break; + case SRTP_AES_ICM_256_KEY_LEN_WSALT: + (*c)->algorithm = SRTP_AES_ICM_256; + (*c)->type = &srtp_aes_icm_256; + icm->key_size = SRTP_AES_256_KEY_LEN; + break; + } + + /* set key size */ + (*c)->key_len = key_len; + + return srtp_err_status_ok; +} + +/* + * This function deallocates an instance of this engine + */ +static srtp_err_status_t srtp_aes_icm_nss_dealloc(srtp_cipher_t *c) +{ + srtp_aes_icm_ctx_t *ctx; + + ctx = (srtp_aes_icm_ctx_t *)c->state; + if (ctx) { + /* free any PK11 values that have been created */ + if (ctx->key) { + PK11_FreeSymKey(ctx->key); + ctx->key = NULL; + } + + if (ctx->ctx) { + PK11_DestroyContext(ctx->ctx, PR_TRUE); + ctx->ctx = NULL; + } + + if (ctx->nss) { + NSS_ShutdownContext(ctx->nss); + ctx->nss = NULL; + } + + /* zeroize everything */ + octet_string_set_to_zero(ctx, sizeof(srtp_aes_icm_ctx_t)); + srtp_crypto_free(ctx); + } + + /* free memory */ + srtp_crypto_free(c); + + return (srtp_err_status_ok); +} + +/* + * aes_icm_nss_context_init(...) initializes the aes_icm_context + * using the value in key[]. + * + * the key is the secret key + * + * the salt is unpredictable (but not necessarily secret) data which + * randomizes the starting point in the keystream + */ +static srtp_err_status_t srtp_aes_icm_nss_context_init(void *cv, + const uint8_t *key) +{ + srtp_aes_icm_ctx_t *c = (srtp_aes_icm_ctx_t *)cv; + + /* + * set counter and initial values to 'offset' value, being careful not to + * go past the end of the key buffer + */ + v128_set_to_zero(&c->counter); + v128_set_to_zero(&c->offset); + memcpy(&c->counter, key + c->key_size, SRTP_SALT_LEN); + memcpy(&c->offset, key + c->key_size, SRTP_SALT_LEN); + + /* force last two octets of the offset to zero (for srtp compatibility) */ + c->offset.v8[SRTP_SALT_LEN] = c->offset.v8[SRTP_SALT_LEN + 1] = 0; + c->counter.v8[SRTP_SALT_LEN] = c->counter.v8[SRTP_SALT_LEN + 1] = 0; + + debug_print(srtp_mod_aes_icm, "key: %s", + srtp_octet_string_hex_string(key, c->key_size)); + debug_print(srtp_mod_aes_icm, "offset: %s", v128_hex_string(&c->offset)); + + if (c->key) { + PK11_FreeSymKey(c->key); + c->key = NULL; + } + + PK11SlotInfo *slot = PK11_GetBestSlot(CKM_AES_CTR, NULL); + if (!slot) { + return srtp_err_status_bad_param; + } + + SECItem keyItem = { siBuffer, (unsigned char *)key, c->key_size }; + c->key = PK11_ImportSymKey(slot, CKM_AES_CTR, PK11_OriginUnwrap, + CKA_ENCRYPT, &keyItem, NULL); + PK11_FreeSlot(slot); + + if (!c->key) { + return srtp_err_status_cipher_fail; + } + + return (srtp_err_status_ok); +} + +/* + * aes_icm_set_iv(c, iv) sets the counter value to the exor of iv with + * the offset + */ +static srtp_err_status_t srtp_aes_icm_nss_set_iv(void *cv, + uint8_t *iv, + srtp_cipher_direction_t dir) +{ + srtp_aes_icm_ctx_t *c = (srtp_aes_icm_ctx_t *)cv; + v128_t nonce; + + /* set nonce (for alignment) */ + v128_copy_octet_string(&nonce, iv); + + debug_print(srtp_mod_aes_icm, "setting iv: %s", v128_hex_string(&nonce)); + + v128_xor(&c->counter, &c->offset, &nonce); + + debug_print(srtp_mod_aes_icm, "set_counter: %s", + v128_hex_string(&c->counter)); + + /* set up the PK11 context now that we have all the info */ + CK_AES_CTR_PARAMS param; + param.ulCounterBits = 16; + memcpy(param.cb, &c->counter, 16); + + if (!c->key) { + return srtp_err_status_bad_param; + } + + if (c->ctx) { + PK11_DestroyContext(c->ctx, PR_TRUE); + } + + SECItem paramItem = { siBuffer, (unsigned char *)¶m, + sizeof(CK_AES_CTR_PARAMS) }; + c->ctx = PK11_CreateContextBySymKey(CKM_AES_CTR, CKA_ENCRYPT, c->key, + ¶mItem); + if (!c->ctx) { + return srtp_err_status_cipher_fail; + } + + return srtp_err_status_ok; +} + +/* + * This function encrypts a buffer using AES CTR mode + * + * Parameters: + * c Crypto context + * buf data to encrypt + * enc_len length of encrypt buffer + */ +static srtp_err_status_t srtp_aes_icm_nss_encrypt(void *cv, + unsigned char *buf, + unsigned int *enc_len) +{ + srtp_aes_icm_ctx_t *c = (srtp_aes_icm_ctx_t *)cv; + + if (!c->ctx) { + return srtp_err_status_bad_param; + } + + int rv = + PK11_CipherOp(c->ctx, buf, (int *)enc_len, *enc_len, buf, *enc_len); + + srtp_err_status_t status = (srtp_err_status_ok); + if (rv != SECSuccess) { + status = (srtp_err_status_cipher_fail); + } + + return status; +} + +/* + * Name of this crypto engine + */ +static const char srtp_aes_icm_128_nss_description[] = + "AES-128 counter mode using NSS"; +static const char srtp_aes_icm_192_nss_description[] = + "AES-192 counter mode using NSS"; +static const char srtp_aes_icm_256_nss_description[] = + "AES-256 counter mode using NSS"; + +/* + * This is the function table for this crypto engine. + * note: the encrypt function is identical to the decrypt function + */ +const srtp_cipher_type_t srtp_aes_icm_128 = { + srtp_aes_icm_nss_alloc, /* */ + srtp_aes_icm_nss_dealloc, /* */ + srtp_aes_icm_nss_context_init, /* */ + 0, /* set_aad */ + srtp_aes_icm_nss_encrypt, /* */ + srtp_aes_icm_nss_encrypt, /* */ + srtp_aes_icm_nss_set_iv, /* */ + 0, /* get_tag */ + srtp_aes_icm_128_nss_description, /* */ + &srtp_aes_icm_128_test_case_0, /* */ + SRTP_AES_ICM_128 /* */ +}; + +/* + * This is the function table for this crypto engine. + * note: the encrypt function is identical to the decrypt function + */ +const srtp_cipher_type_t srtp_aes_icm_192 = { + srtp_aes_icm_nss_alloc, /* */ + srtp_aes_icm_nss_dealloc, /* */ + srtp_aes_icm_nss_context_init, /* */ + 0, /* set_aad */ + srtp_aes_icm_nss_encrypt, /* */ + srtp_aes_icm_nss_encrypt, /* */ + srtp_aes_icm_nss_set_iv, /* */ + 0, /* get_tag */ + srtp_aes_icm_192_nss_description, /* */ + &srtp_aes_icm_192_test_case_0, /* */ + SRTP_AES_ICM_192 /* */ +}; + +/* + * This is the function table for this crypto engine. + * note: the encrypt function is identical to the decrypt function + */ +const srtp_cipher_type_t srtp_aes_icm_256 = { + srtp_aes_icm_nss_alloc, /* */ + srtp_aes_icm_nss_dealloc, /* */ + srtp_aes_icm_nss_context_init, /* */ + 0, /* set_aad */ + srtp_aes_icm_nss_encrypt, /* */ + srtp_aes_icm_nss_encrypt, /* */ + srtp_aes_icm_nss_set_iv, /* */ + 0, /* get_tag */ + srtp_aes_icm_256_nss_description, /* */ + &srtp_aes_icm_256_test_case_0, /* */ + SRTP_AES_ICM_256 /* */ +}; diff --git a/third_party/libsrtp/src/crypto/cipher/aes_icm_ossl.c b/third_party/libsrtp/src/crypto/cipher/aes_icm_ossl.c new file mode 100644 index 0000000000..f960a33ecf --- /dev/null +++ b/third_party/libsrtp/src/crypto/cipher/aes_icm_ossl.c @@ -0,0 +1,383 @@ +/* + * aes_icm_ossl.c + * + * AES Integer Counter Mode + * + * John A. Foley + * Cisco Systems, Inc. + * + * 2/24/2012: This module was modified to use CiscoSSL for AES counter + * mode. Eddy Lem contributed the code to allow this. + * + * 12/20/2012: Added support for AES-192 and AES-256. + */ + +/* + * + * Copyright (c) 2013-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <openssl/evp.h> +#include "aes_icm_ext.h" +#include "crypto_types.h" +#include "err.h" /* for srtp_debug */ +#include "alloc.h" +#include "cipher_types.h" +#include "cipher_test_cases.h" + +srtp_debug_module_t srtp_mod_aes_icm = { + 0, /* debugging is off by default */ + "aes icm ossl" /* printable module name */ +}; + +/* + * integer counter mode works as follows: + * + * 16 bits + * <-----> + * +------+------+------+------+------+------+------+------+ + * | nonce | packet index | ctr |---+ + * +------+------+------+------+------+------+------+------+ | + * | + * +------+------+------+------+------+------+------+------+ v + * | salt |000000|->(+) + * +------+------+------+------+------+------+------+------+ | + * | + * +---------+ + * | encrypt | + * +---------+ + * | + * +------+------+------+------+------+------+------+------+ | + * | keystream block |<--+ + * +------+------+------+------+------+------+------+------+ + * + * All fields are big-endian + * + * ctr is the block counter, which increments from zero for + * each packet (16 bits wide) + * + * packet index is distinct for each packet (48 bits wide) + * + * nonce can be distinct across many uses of the same key, or + * can be a fixed value per key, or can be per-packet randomness + * (64 bits) + * + */ + +/* + * This function allocates a new instance of this crypto engine. + * The key_len parameter should be one of 30, 38, or 46 for + * AES-128, AES-192, and AES-256 respectively. Note, this key_len + * value is inflated, as it also accounts for the 112 bit salt + * value. The tlen argument is for the AEAD tag length, which + * isn't used in counter mode. + */ +static srtp_err_status_t srtp_aes_icm_openssl_alloc(srtp_cipher_t **c, + int key_len, + int tlen) +{ + srtp_aes_icm_ctx_t *icm; + + debug_print(srtp_mod_aes_icm, "allocating cipher with key length %d", + key_len); + + /* + * Verify the key_len is valid for one of: AES-128/192/256 + */ + if (key_len != SRTP_AES_ICM_128_KEY_LEN_WSALT && + key_len != SRTP_AES_ICM_192_KEY_LEN_WSALT && + key_len != SRTP_AES_ICM_256_KEY_LEN_WSALT) { + return srtp_err_status_bad_param; + } + + /* allocate memory a cipher of type aes_icm */ + *c = (srtp_cipher_t *)srtp_crypto_alloc(sizeof(srtp_cipher_t)); + if (*c == NULL) { + return srtp_err_status_alloc_fail; + } + + icm = (srtp_aes_icm_ctx_t *)srtp_crypto_alloc(sizeof(srtp_aes_icm_ctx_t)); + if (icm == NULL) { + srtp_crypto_free(*c); + *c = NULL; + return srtp_err_status_alloc_fail; + } + + icm->ctx = EVP_CIPHER_CTX_new(); + if (icm->ctx == NULL) { + srtp_crypto_free(icm); + srtp_crypto_free(*c); + *c = NULL; + return srtp_err_status_alloc_fail; + } + + /* set pointers */ + (*c)->state = icm; + + /* setup cipher parameters */ + switch (key_len) { + case SRTP_AES_ICM_128_KEY_LEN_WSALT: + (*c)->algorithm = SRTP_AES_ICM_128; + (*c)->type = &srtp_aes_icm_128; + icm->key_size = SRTP_AES_128_KEY_LEN; + break; + case SRTP_AES_ICM_192_KEY_LEN_WSALT: + (*c)->algorithm = SRTP_AES_ICM_192; + (*c)->type = &srtp_aes_icm_192; + icm->key_size = SRTP_AES_192_KEY_LEN; + break; + case SRTP_AES_ICM_256_KEY_LEN_WSALT: + (*c)->algorithm = SRTP_AES_ICM_256; + (*c)->type = &srtp_aes_icm_256; + icm->key_size = SRTP_AES_256_KEY_LEN; + break; + } + + /* set key size */ + (*c)->key_len = key_len; + + return srtp_err_status_ok; +} + +/* + * This function deallocates an instance of this engine + */ +static srtp_err_status_t srtp_aes_icm_openssl_dealloc(srtp_cipher_t *c) +{ + srtp_aes_icm_ctx_t *ctx; + + if (c == NULL) { + return srtp_err_status_bad_param; + } + + /* + * Free the EVP context + */ + ctx = (srtp_aes_icm_ctx_t *)c->state; + if (ctx != NULL) { + EVP_CIPHER_CTX_free(ctx->ctx); + /* zeroize the key material */ + octet_string_set_to_zero(ctx, sizeof(srtp_aes_icm_ctx_t)); + srtp_crypto_free(ctx); + } + + /* free memory */ + srtp_crypto_free(c); + + return srtp_err_status_ok; +} + +/* + * aes_icm_openssl_context_init(...) initializes the aes_icm_context + * using the value in key[]. + * + * the key is the secret key + * + * the salt is unpredictable (but not necessarily secret) data which + * randomizes the starting point in the keystream + */ +static srtp_err_status_t srtp_aes_icm_openssl_context_init(void *cv, + const uint8_t *key) +{ + srtp_aes_icm_ctx_t *c = (srtp_aes_icm_ctx_t *)cv; + const EVP_CIPHER *evp; + + /* + * set counter and initial values to 'offset' value, being careful not to + * go past the end of the key buffer + */ + v128_set_to_zero(&c->counter); + v128_set_to_zero(&c->offset); + memcpy(&c->counter, key + c->key_size, SRTP_SALT_LEN); + memcpy(&c->offset, key + c->key_size, SRTP_SALT_LEN); + + /* force last two octets of the offset to zero (for srtp compatibility) */ + c->offset.v8[SRTP_SALT_LEN] = c->offset.v8[SRTP_SALT_LEN + 1] = 0; + c->counter.v8[SRTP_SALT_LEN] = c->counter.v8[SRTP_SALT_LEN + 1] = 0; + + debug_print(srtp_mod_aes_icm, "key: %s", + srtp_octet_string_hex_string(key, c->key_size)); + debug_print(srtp_mod_aes_icm, "offset: %s", v128_hex_string(&c->offset)); + + switch (c->key_size) { + case SRTP_AES_256_KEY_LEN: + evp = EVP_aes_256_ctr(); + break; + case SRTP_AES_192_KEY_LEN: + evp = EVP_aes_192_ctr(); + break; + case SRTP_AES_128_KEY_LEN: + evp = EVP_aes_128_ctr(); + break; + default: + return srtp_err_status_bad_param; + break; + } + + EVP_CIPHER_CTX_cleanup(c->ctx); + if (!EVP_EncryptInit_ex(c->ctx, evp, NULL, key, NULL)) { + return srtp_err_status_fail; + } else { + return srtp_err_status_ok; + } + + return srtp_err_status_ok; +} + +/* + * aes_icm_set_iv(c, iv) sets the counter value to the exor of iv with + * the offset + */ +static srtp_err_status_t srtp_aes_icm_openssl_set_iv( + void *cv, + uint8_t *iv, + srtp_cipher_direction_t dir) +{ + srtp_aes_icm_ctx_t *c = (srtp_aes_icm_ctx_t *)cv; + v128_t nonce; + + /* set nonce (for alignment) */ + v128_copy_octet_string(&nonce, iv); + + debug_print(srtp_mod_aes_icm, "setting iv: %s", v128_hex_string(&nonce)); + + v128_xor(&c->counter, &c->offset, &nonce); + + debug_print(srtp_mod_aes_icm, "set_counter: %s", + v128_hex_string(&c->counter)); + + if (!EVP_EncryptInit_ex(c->ctx, NULL, NULL, NULL, c->counter.v8)) { + return srtp_err_status_fail; + } else { + return srtp_err_status_ok; + } +} + +/* + * This function encrypts a buffer using AES CTR mode + * + * Parameters: + * c Crypto context + * buf data to encrypt + * enc_len length of encrypt buffer + */ +static srtp_err_status_t srtp_aes_icm_openssl_encrypt(void *cv, + unsigned char *buf, + unsigned int *enc_len) +{ + srtp_aes_icm_ctx_t *c = (srtp_aes_icm_ctx_t *)cv; + int len = 0; + + debug_print(srtp_mod_aes_icm, "rs0: %s", v128_hex_string(&c->counter)); + + if (!EVP_EncryptUpdate(c->ctx, buf, &len, buf, *enc_len)) { + return srtp_err_status_cipher_fail; + } + *enc_len = len; + + if (!EVP_EncryptFinal_ex(c->ctx, buf + len, &len)) { + return srtp_err_status_cipher_fail; + } + *enc_len += len; + + return srtp_err_status_ok; +} + +/* + * Name of this crypto engine + */ +static const char srtp_aes_icm_128_openssl_description[] = + "AES-128 counter mode using openssl"; +static const char srtp_aes_icm_192_openssl_description[] = + "AES-192 counter mode using openssl"; +static const char srtp_aes_icm_256_openssl_description[] = + "AES-256 counter mode using openssl"; + +/* + * This is the function table for this crypto engine. + * note: the encrypt function is identical to the decrypt function + */ +const srtp_cipher_type_t srtp_aes_icm_128 = { + srtp_aes_icm_openssl_alloc, /* */ + srtp_aes_icm_openssl_dealloc, /* */ + srtp_aes_icm_openssl_context_init, /* */ + 0, /* set_aad */ + srtp_aes_icm_openssl_encrypt, /* */ + srtp_aes_icm_openssl_encrypt, /* */ + srtp_aes_icm_openssl_set_iv, /* */ + 0, /* get_tag */ + srtp_aes_icm_128_openssl_description, /* */ + &srtp_aes_icm_128_test_case_0, /* */ + SRTP_AES_ICM_128 /* */ +}; + +/* + * This is the function table for this crypto engine. + * note: the encrypt function is identical to the decrypt function + */ +const srtp_cipher_type_t srtp_aes_icm_192 = { + srtp_aes_icm_openssl_alloc, /* */ + srtp_aes_icm_openssl_dealloc, /* */ + srtp_aes_icm_openssl_context_init, /* */ + 0, /* set_aad */ + srtp_aes_icm_openssl_encrypt, /* */ + srtp_aes_icm_openssl_encrypt, /* */ + srtp_aes_icm_openssl_set_iv, /* */ + 0, /* get_tag */ + srtp_aes_icm_192_openssl_description, /* */ + &srtp_aes_icm_192_test_case_0, /* */ + SRTP_AES_ICM_192 /* */ +}; + +/* + * This is the function table for this crypto engine. + * note: the encrypt function is identical to the decrypt function + */ +const srtp_cipher_type_t srtp_aes_icm_256 = { + srtp_aes_icm_openssl_alloc, /* */ + srtp_aes_icm_openssl_dealloc, /* */ + srtp_aes_icm_openssl_context_init, /* */ + 0, /* set_aad */ + srtp_aes_icm_openssl_encrypt, /* */ + srtp_aes_icm_openssl_encrypt, /* */ + srtp_aes_icm_openssl_set_iv, /* */ + 0, /* get_tag */ + srtp_aes_icm_256_openssl_description, /* */ + &srtp_aes_icm_256_test_case_0, /* */ + SRTP_AES_ICM_256 /* */ +}; diff --git a/third_party/libsrtp/src/crypto/cipher/cipher.c b/third_party/libsrtp/src/crypto/cipher/cipher.c new file mode 100644 index 0000000000..de93bc90d8 --- /dev/null +++ b/third_party/libsrtp/src/crypto/cipher/cipher.c @@ -0,0 +1,664 @@ +/* + * cipher.c + * + * cipher meta-functions + * + * David A. McGrew + * Cisco Systems, Inc. + * + */ + +/* + * + * Copyright (c) 2001-2017 Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "cipher.h" +#include "cipher_priv.h" +#include "crypto_types.h" +#include "err.h" /* for srtp_debug */ +#include "alloc.h" /* for crypto_alloc(), crypto_free() */ + +srtp_debug_module_t srtp_mod_cipher = { + 0, /* debugging is off by default */ + "cipher" /* printable module name */ +}; + +srtp_err_status_t srtp_cipher_type_alloc(const srtp_cipher_type_t *ct, + srtp_cipher_t **c, + int key_len, + int tlen) +{ + if (!ct || !ct->alloc) { + return (srtp_err_status_bad_param); + } + return ((ct)->alloc((c), (key_len), (tlen))); +} + +srtp_err_status_t srtp_cipher_dealloc(srtp_cipher_t *c) +{ + if (!c || !c->type) { + return (srtp_err_status_bad_param); + } + return (((c)->type)->dealloc(c)); +} + +srtp_err_status_t srtp_cipher_init(srtp_cipher_t *c, const uint8_t *key) +{ + if (!c || !c->type || !c->state) { + return (srtp_err_status_bad_param); + } + return (((c)->type)->init(((c)->state), (key))); +} + +srtp_err_status_t srtp_cipher_set_iv(srtp_cipher_t *c, + uint8_t *iv, + int direction) +{ + if (!c || !c->type || !c->state) { + return (srtp_err_status_bad_param); + } + + return (((c)->type)->set_iv(((c)->state), iv, direction)); +} + +srtp_err_status_t srtp_cipher_output(srtp_cipher_t *c, + uint8_t *buffer, + uint32_t *num_octets_to_output) +{ + /* zeroize the buffer */ + octet_string_set_to_zero(buffer, *num_octets_to_output); + + /* exor keystream into buffer */ + return (((c)->type)->encrypt(((c)->state), buffer, num_octets_to_output)); +} + +srtp_err_status_t srtp_cipher_encrypt(srtp_cipher_t *c, + uint8_t *buffer, + uint32_t *num_octets_to_output) +{ + if (!c || !c->type || !c->state) { + return (srtp_err_status_bad_param); + } + + return (((c)->type)->encrypt(((c)->state), buffer, num_octets_to_output)); +} + +srtp_err_status_t srtp_cipher_decrypt(srtp_cipher_t *c, + uint8_t *buffer, + uint32_t *num_octets_to_output) +{ + if (!c || !c->type || !c->state) { + return (srtp_err_status_bad_param); + } + + return (((c)->type)->decrypt(((c)->state), buffer, num_octets_to_output)); +} + +srtp_err_status_t srtp_cipher_get_tag(srtp_cipher_t *c, + uint8_t *buffer, + uint32_t *tag_len) +{ + if (!c || !c->type || !c->state) { + return (srtp_err_status_bad_param); + } + if (!((c)->type)->get_tag) { + return (srtp_err_status_no_such_op); + } + + return (((c)->type)->get_tag(((c)->state), buffer, tag_len)); +} + +srtp_err_status_t srtp_cipher_set_aad(srtp_cipher_t *c, + const uint8_t *aad, + uint32_t aad_len) +{ + if (!c || !c->type || !c->state) { + return (srtp_err_status_bad_param); + } + if (!((c)->type)->set_aad) { + return (srtp_err_status_no_such_op); + } + + return (((c)->type)->set_aad(((c)->state), aad, aad_len)); +} + +/* some bookkeeping functions */ + +int srtp_cipher_get_key_length(const srtp_cipher_t *c) +{ + return c->key_len; +} + +/* + * A trivial platform independent random source. + * For use in test only. + */ +void srtp_cipher_rand_for_tests(void *dest, uint32_t len) +{ + /* Generic C-library (rand()) version */ + /* This is a random source of last resort */ + uint8_t *dst = (uint8_t *)dest; + while (len) { + int val = rand(); + /* rand() returns 0-32767 (ugh) */ + /* Is this a good enough way to get random bytes? + It is if it passes FIPS-140... */ + *dst++ = val & 0xff; + len--; + } +} + +/* + * A trivial platform independent 32 bit random number. + * For use in test only. + */ +uint32_t srtp_cipher_rand_u32_for_tests(void) +{ + uint32_t r; + srtp_cipher_rand_for_tests(&r, sizeof(r)); + return r; +} + +#define SELF_TEST_BUF_OCTETS 128 +#define NUM_RAND_TESTS 128 +#define MAX_KEY_LEN 64 +/* + * srtp_cipher_type_test(ct, test_data) tests a cipher of type ct against + * test cases provided in a list test_data of values of key, salt, iv, + * plaintext, and ciphertext that is known to be good + */ +srtp_err_status_t srtp_cipher_type_test( + const srtp_cipher_type_t *ct, + const srtp_cipher_test_case_t *test_data) +{ + const srtp_cipher_test_case_t *test_case = test_data; + srtp_cipher_t *c; + srtp_err_status_t status; + uint8_t buffer[SELF_TEST_BUF_OCTETS]; + uint8_t buffer2[SELF_TEST_BUF_OCTETS]; + uint32_t tag_len; + unsigned int len; + int i, j, case_num = 0; + unsigned k = 0; + + debug_print(srtp_mod_cipher, "running self-test for cipher %s", + ct->description); + + /* + * check to make sure that we have at least one test case, and + * return an error if we don't - we need to be paranoid here + */ + if (test_case == NULL) { + return srtp_err_status_cant_check; + } + + /* + * loop over all test cases, perform known-answer tests of both the + * encryption and decryption functions + */ + while (test_case != NULL) { + /* allocate cipher */ + status = srtp_cipher_type_alloc(ct, &c, test_case->key_length_octets, + test_case->tag_length_octets); + if (status) { + return status; + } + + /* + * test the encrypt function + */ + debug_print0(srtp_mod_cipher, "testing encryption"); + + /* initialize cipher */ + status = srtp_cipher_init(c, test_case->key); + if (status) { + srtp_cipher_dealloc(c); + return status; + } + + /* copy plaintext into test buffer */ + if (test_case->ciphertext_length_octets > SELF_TEST_BUF_OCTETS) { + srtp_cipher_dealloc(c); + return srtp_err_status_bad_param; + } + for (k = 0; k < test_case->plaintext_length_octets; k++) { + buffer[k] = test_case->plaintext[k]; + } + + debug_print(srtp_mod_cipher, "plaintext: %s", + srtp_octet_string_hex_string( + buffer, test_case->plaintext_length_octets)); + + /* set the initialization vector */ + status = srtp_cipher_set_iv(c, (uint8_t *)test_case->idx, + srtp_direction_encrypt); + if (status) { + srtp_cipher_dealloc(c); + return status; + } + + if (c->algorithm == SRTP_AES_GCM_128 || + c->algorithm == SRTP_AES_GCM_256) { + debug_print(srtp_mod_cipher, "IV: %s", + srtp_octet_string_hex_string(test_case->idx, 12)); + + /* + * Set the AAD + */ + status = srtp_cipher_set_aad(c, test_case->aad, + test_case->aad_length_octets); + if (status) { + srtp_cipher_dealloc(c); + return status; + } + debug_print(srtp_mod_cipher, "AAD: %s", + srtp_octet_string_hex_string( + test_case->aad, test_case->aad_length_octets)); + } + + /* encrypt */ + len = test_case->plaintext_length_octets; + status = srtp_cipher_encrypt(c, buffer, &len); + if (status) { + srtp_cipher_dealloc(c); + return status; + } + + if (c->algorithm == SRTP_AES_GCM_128 || + c->algorithm == SRTP_AES_GCM_256) { + /* + * Get the GCM tag + */ + status = srtp_cipher_get_tag(c, buffer + len, &tag_len); + if (status) { + srtp_cipher_dealloc(c); + return status; + } + len += tag_len; + } + + debug_print(srtp_mod_cipher, "ciphertext: %s", + srtp_octet_string_hex_string( + buffer, test_case->ciphertext_length_octets)); + + /* compare the resulting ciphertext with that in the test case */ + if (len != test_case->ciphertext_length_octets) { + srtp_cipher_dealloc(c); + return srtp_err_status_algo_fail; + } + status = srtp_err_status_ok; + for (k = 0; k < test_case->ciphertext_length_octets; k++) { + if (buffer[k] != test_case->ciphertext[k]) { + status = srtp_err_status_algo_fail; + debug_print(srtp_mod_cipher, "test case %d failed", case_num); + debug_print(srtp_mod_cipher, "(failure at byte %u)", k); + break; + } + } + if (status) { + debug_print(srtp_mod_cipher, "c computed: %s", + srtp_octet_string_hex_string( + buffer, 2 * test_case->plaintext_length_octets)); + debug_print(srtp_mod_cipher, "c expected: %s", + srtp_octet_string_hex_string( + test_case->ciphertext, + 2 * test_case->plaintext_length_octets)); + + srtp_cipher_dealloc(c); + return srtp_err_status_algo_fail; + } + + /* + * test the decrypt function + */ + debug_print0(srtp_mod_cipher, "testing decryption"); + + /* re-initialize cipher for decryption */ + status = srtp_cipher_init(c, test_case->key); + if (status) { + srtp_cipher_dealloc(c); + return status; + } + + /* copy ciphertext into test buffer */ + if (test_case->ciphertext_length_octets > SELF_TEST_BUF_OCTETS) { + srtp_cipher_dealloc(c); + return srtp_err_status_bad_param; + } + for (k = 0; k < test_case->ciphertext_length_octets; k++) { + buffer[k] = test_case->ciphertext[k]; + } + + debug_print(srtp_mod_cipher, "ciphertext: %s", + srtp_octet_string_hex_string( + buffer, test_case->plaintext_length_octets)); + + /* set the initialization vector */ + status = srtp_cipher_set_iv(c, (uint8_t *)test_case->idx, + srtp_direction_decrypt); + if (status) { + srtp_cipher_dealloc(c); + return status; + } + + if (c->algorithm == SRTP_AES_GCM_128 || + c->algorithm == SRTP_AES_GCM_256) { + /* + * Set the AAD + */ + status = srtp_cipher_set_aad(c, test_case->aad, + test_case->aad_length_octets); + if (status) { + srtp_cipher_dealloc(c); + return status; + } + debug_print(srtp_mod_cipher, "AAD: %s", + srtp_octet_string_hex_string( + test_case->aad, test_case->aad_length_octets)); + } + + /* decrypt */ + len = test_case->ciphertext_length_octets; + status = srtp_cipher_decrypt(c, buffer, &len); + if (status) { + srtp_cipher_dealloc(c); + return status; + } + + debug_print(srtp_mod_cipher, "plaintext: %s", + srtp_octet_string_hex_string( + buffer, test_case->plaintext_length_octets)); + + /* compare the resulting plaintext with that in the test case */ + if (len != test_case->plaintext_length_octets) { + srtp_cipher_dealloc(c); + return srtp_err_status_algo_fail; + } + status = srtp_err_status_ok; + for (k = 0; k < test_case->plaintext_length_octets; k++) { + if (buffer[k] != test_case->plaintext[k]) { + status = srtp_err_status_algo_fail; + debug_print(srtp_mod_cipher, "test case %d failed", case_num); + debug_print(srtp_mod_cipher, "(failure at byte %u)", k); + } + } + if (status) { + debug_print(srtp_mod_cipher, "p computed: %s", + srtp_octet_string_hex_string( + buffer, 2 * test_case->plaintext_length_octets)); + debug_print(srtp_mod_cipher, "p expected: %s", + srtp_octet_string_hex_string( + test_case->plaintext, + 2 * test_case->plaintext_length_octets)); + + srtp_cipher_dealloc(c); + return srtp_err_status_algo_fail; + } + + /* deallocate the cipher */ + status = srtp_cipher_dealloc(c); + if (status) { + return status; + } + + /* + * the cipher passed the test case, so move on to the next test + * case in the list; if NULL, we'l proceed to the next test + */ + test_case = test_case->next_test_case; + ++case_num; + } + + /* now run some random invertibility tests */ + + /* allocate cipher, using paramaters from the first test case */ + test_case = test_data; + status = srtp_cipher_type_alloc(ct, &c, test_case->key_length_octets, + test_case->tag_length_octets); + if (status) { + return status; + } + + for (j = 0; j < NUM_RAND_TESTS; j++) { + unsigned int length; + unsigned int plaintext_len; + uint8_t key[MAX_KEY_LEN]; + uint8_t iv[MAX_KEY_LEN]; + + /* choose a length at random (leaving room for IV and padding) */ + length = srtp_cipher_rand_u32_for_tests() % (SELF_TEST_BUF_OCTETS - 64); + debug_print(srtp_mod_cipher, "random plaintext length %d\n", length); + srtp_cipher_rand_for_tests(buffer, length); + + debug_print(srtp_mod_cipher, "plaintext: %s", + srtp_octet_string_hex_string(buffer, length)); + + /* copy plaintext into second buffer */ + for (i = 0; (unsigned int)i < length; i++) { + buffer2[i] = buffer[i]; + } + + /* choose a key at random */ + if (test_case->key_length_octets > MAX_KEY_LEN) { + srtp_cipher_dealloc(c); + return srtp_err_status_cant_check; + } + srtp_cipher_rand_for_tests(key, test_case->key_length_octets); + + /* chose a random initialization vector */ + srtp_cipher_rand_for_tests(iv, MAX_KEY_LEN); + + /* initialize cipher */ + status = srtp_cipher_init(c, key); + if (status) { + srtp_cipher_dealloc(c); + return status; + } + + /* set initialization vector */ + status = srtp_cipher_set_iv(c, (uint8_t *)test_case->idx, + srtp_direction_encrypt); + if (status) { + srtp_cipher_dealloc(c); + return status; + } + + if (c->algorithm == SRTP_AES_GCM_128 || + c->algorithm == SRTP_AES_GCM_256) { + /* + * Set the AAD + */ + status = srtp_cipher_set_aad(c, test_case->aad, + test_case->aad_length_octets); + if (status) { + srtp_cipher_dealloc(c); + return status; + } + debug_print(srtp_mod_cipher, "AAD: %s", + srtp_octet_string_hex_string( + test_case->aad, test_case->aad_length_octets)); + } + + /* encrypt buffer with cipher */ + plaintext_len = length; + status = srtp_cipher_encrypt(c, buffer, &length); + if (status) { + srtp_cipher_dealloc(c); + return status; + } + if (c->algorithm == SRTP_AES_GCM_128 || + c->algorithm == SRTP_AES_GCM_256) { + /* + * Get the GCM tag + */ + status = srtp_cipher_get_tag(c, buffer + length, &tag_len); + if (status) { + srtp_cipher_dealloc(c); + return status; + } + length += tag_len; + } + debug_print(srtp_mod_cipher, "ciphertext: %s", + srtp_octet_string_hex_string(buffer, length)); + + /* + * re-initialize cipher for decryption, re-set the iv, then + * decrypt the ciphertext + */ + status = srtp_cipher_init(c, key); + if (status) { + srtp_cipher_dealloc(c); + return status; + } + status = srtp_cipher_set_iv(c, (uint8_t *)test_case->idx, + srtp_direction_decrypt); + if (status) { + srtp_cipher_dealloc(c); + return status; + } + if (c->algorithm == SRTP_AES_GCM_128 || + c->algorithm == SRTP_AES_GCM_256) { + /* + * Set the AAD + */ + status = srtp_cipher_set_aad(c, test_case->aad, + test_case->aad_length_octets); + if (status) { + srtp_cipher_dealloc(c); + return status; + } + debug_print(srtp_mod_cipher, "AAD: %s", + srtp_octet_string_hex_string( + test_case->aad, test_case->aad_length_octets)); + } + status = srtp_cipher_decrypt(c, buffer, &length); + if (status) { + srtp_cipher_dealloc(c); + return status; + } + + debug_print(srtp_mod_cipher, "plaintext[2]: %s", + srtp_octet_string_hex_string(buffer, length)); + + /* compare the resulting plaintext with the original one */ + if (length != plaintext_len) { + srtp_cipher_dealloc(c); + return srtp_err_status_algo_fail; + } + status = srtp_err_status_ok; + for (k = 0; k < plaintext_len; k++) { + if (buffer[k] != buffer2[k]) { + status = srtp_err_status_algo_fail; + debug_print(srtp_mod_cipher, "random test case %d failed", + case_num); + debug_print(srtp_mod_cipher, "(failure at byte %u)", k); + } + } + if (status) { + srtp_cipher_dealloc(c); + return srtp_err_status_algo_fail; + } + } + + status = srtp_cipher_dealloc(c); + if (status) { + return status; + } + + return srtp_err_status_ok; +} + +/* + * srtp_cipher_type_self_test(ct) performs srtp_cipher_type_test on ct's + * internal list of test data. + */ +srtp_err_status_t srtp_cipher_type_self_test(const srtp_cipher_type_t *ct) +{ + return srtp_cipher_type_test(ct, ct->test_data); +} + +/* + * cipher_bits_per_second(c, l, t) computes (an estimate of) the + * number of bits that a cipher implementation can encrypt in a second + * + * c is a cipher (which MUST be allocated and initialized already), l + * is the length in octets of the test data to be encrypted, and t is + * the number of trials + * + * if an error is encountered, the value 0 is returned + */ +uint64_t srtp_cipher_bits_per_second(srtp_cipher_t *c, + int octets_in_buffer, + int num_trials) +{ + int i; + v128_t nonce; + clock_t timer; + unsigned char *enc_buf; + unsigned int len = octets_in_buffer; + + enc_buf = (unsigned char *)srtp_crypto_alloc(octets_in_buffer); + if (enc_buf == NULL) { + return 0; /* indicate bad parameters by returning null */ + } + /* time repeated trials */ + v128_set_to_zero(&nonce); + timer = clock(); + for (i = 0; i < num_trials; i++, nonce.v32[3] = i) { + if (srtp_cipher_set_iv(c, (uint8_t *)&nonce, srtp_direction_encrypt) != + srtp_err_status_ok) { + srtp_crypto_free(enc_buf); + return 0; + } + if (srtp_cipher_encrypt(c, enc_buf, &len) != srtp_err_status_ok) { + srtp_crypto_free(enc_buf); + return 0; + } + } + timer = clock() - timer; + + srtp_crypto_free(enc_buf); + + if (timer == 0) { + /* Too fast! */ + return 0; + } + + return (uint64_t)CLOCKS_PER_SEC * num_trials * 8 * octets_in_buffer / timer; +} diff --git a/third_party/libsrtp/src/crypto/cipher/cipher_test_cases.c b/third_party/libsrtp/src/crypto/cipher/cipher_test_cases.c new file mode 100644 index 0000000000..e4b8f0fcd8 --- /dev/null +++ b/third_party/libsrtp/src/crypto/cipher/cipher_test_cases.c @@ -0,0 +1,365 @@ +/* + * + * Copyright (c) 2013-2021, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#include "cipher_test_cases.h" +#include <stddef.h> + +/* + * KAT values for AES self-test. These + * values came from the legacy libsrtp code. + */ +/* clang-format off */ +static const uint8_t srtp_aes_icm_128_test_case_0_key[SRTP_AES_ICM_128_KEY_LEN_WSALT] = { + 0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6, + 0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c, + 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, + 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd +}; +/* clang-format on */ + +/* clang-format off */ +static uint8_t srtp_aes_icm_128_test_case_0_nonce[16] = { + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 +}; +/* clang-format on */ + +/* clang-format off */ +static const uint8_t srtp_aes_icm_128_test_case_0_plaintext[32] = { + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, +}; +/* clang-format on */ + +/* clang-format off */ +static const uint8_t srtp_aes_icm_128_test_case_0_ciphertext[32] = { + 0xe0, 0x3e, 0xad, 0x09, 0x35, 0xc9, 0x5e, 0x80, + 0xe1, 0x66, 0xb1, 0x6d, 0xd9, 0x2b, 0x4e, 0xb4, + 0xd2, 0x35, 0x13, 0x16, 0x2b, 0x02, 0xd0, 0xf7, + 0x2a, 0x43, 0xa2, 0xfe, 0x4a, 0x5f, 0x97, 0xab +}; +/* clang-format on */ + +const srtp_cipher_test_case_t srtp_aes_icm_128_test_case_0 = { + SRTP_AES_ICM_128_KEY_LEN_WSALT, /* octets in key */ + srtp_aes_icm_128_test_case_0_key, /* key */ + srtp_aes_icm_128_test_case_0_nonce, /* packet index */ + 32, /* octets in plaintext */ + srtp_aes_icm_128_test_case_0_plaintext, /* plaintext */ + 32, /* octets in ciphertext */ + srtp_aes_icm_128_test_case_0_ciphertext, /* ciphertext */ + 0, /* */ + NULL, /* */ + 0, /* */ + NULL /* pointer to next testcase */ +}; + +/* + * KAT values for AES-192-CTR self-test. These + * values came from section 7 of RFC 6188. + */ +/* clang-format off */ +static const uint8_t srtp_aes_icm_192_test_case_0_key[SRTP_AES_ICM_192_KEY_LEN_WSALT] = { + 0xea, 0xb2, 0x34, 0x76, 0x4e, 0x51, 0x7b, 0x2d, + 0x3d, 0x16, 0x0d, 0x58, 0x7d, 0x8c, 0x86, 0x21, + 0x97, 0x40, 0xf6, 0x5f, 0x99, 0xb6, 0xbc, 0xf7, + 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, + 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd +}; +/* clang-format on */ + +/* clang-format off */ +static uint8_t srtp_aes_icm_192_test_case_0_nonce[16] = { + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 +}; +/* clang-format on */ + +/* clang-format off */ +static const uint8_t srtp_aes_icm_192_test_case_0_plaintext[32] = { + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, +}; +/* clang-format on */ + +/* clang-format off */ +static const uint8_t srtp_aes_icm_192_test_case_0_ciphertext[32] = { + 0x35, 0x09, 0x6c, 0xba, 0x46, 0x10, 0x02, 0x8d, + 0xc1, 0xb5, 0x75, 0x03, 0x80, 0x4c, 0xe3, 0x7c, + 0x5d, 0xe9, 0x86, 0x29, 0x1d, 0xcc, 0xe1, 0x61, + 0xd5, 0x16, 0x5e, 0xc4, 0x56, 0x8f, 0x5c, 0x9a +}; +/* clang-format on */ + +const srtp_cipher_test_case_t srtp_aes_icm_192_test_case_0 = { + SRTP_AES_ICM_192_KEY_LEN_WSALT, /* octets in key */ + srtp_aes_icm_192_test_case_0_key, /* key */ + srtp_aes_icm_192_test_case_0_nonce, /* packet index */ + 32, /* octets in plaintext */ + srtp_aes_icm_192_test_case_0_plaintext, /* plaintext */ + 32, /* octets in ciphertext */ + srtp_aes_icm_192_test_case_0_ciphertext, /* ciphertext */ + 0, /* */ + NULL, /* */ + 0, /* */ + NULL /* pointer to next testcase */ +}; + +/* + * KAT values for AES-256-CTR self-test. These + * values came from section 7 of RFC 6188. + */ +/* clang-format off */ +static const uint8_t srtp_aes_icm_256_test_case_0_key[SRTP_AES_ICM_256_KEY_LEN_WSALT] = { + 0x57, 0xf8, 0x2f, 0xe3, 0x61, 0x3f, 0xd1, 0x70, + 0xa8, 0x5e, 0xc9, 0x3c, 0x40, 0xb1, 0xf0, 0x92, + 0x2e, 0xc4, 0xcb, 0x0d, 0xc0, 0x25, 0xb5, 0x82, + 0x72, 0x14, 0x7c, 0xc4, 0x38, 0x94, 0x4a, 0x98, + 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, + 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd +}; +/* clang-format on */ + +/* clang-format off */ +static uint8_t srtp_aes_icm_256_test_case_0_nonce[16] = { + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 +}; +/* clang-format on */ + +/* clang-format off */ +static const uint8_t srtp_aes_icm_256_test_case_0_plaintext[32] = { + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, +}; +/* clang-format on */ + +/* clang-format off */ +static const uint8_t srtp_aes_icm_256_test_case_0_ciphertext[32] = { + 0x92, 0xbd, 0xd2, 0x8a, 0x93, 0xc3, 0xf5, 0x25, + 0x11, 0xc6, 0x77, 0xd0, 0x8b, 0x55, 0x15, 0xa4, + 0x9d, 0xa7, 0x1b, 0x23, 0x78, 0xa8, 0x54, 0xf6, + 0x70, 0x50, 0x75, 0x6d, 0xed, 0x16, 0x5b, 0xac +}; +/* clang-format on */ + +const srtp_cipher_test_case_t srtp_aes_icm_256_test_case_0 = { + SRTP_AES_ICM_256_KEY_LEN_WSALT, /* octets in key */ + srtp_aes_icm_256_test_case_0_key, /* key */ + srtp_aes_icm_256_test_case_0_nonce, /* packet index */ + 32, /* octets in plaintext */ + srtp_aes_icm_256_test_case_0_plaintext, /* plaintext */ + 32, /* octets in ciphertext */ + srtp_aes_icm_256_test_case_0_ciphertext, /* ciphertext */ + 0, /* */ + NULL, /* */ + 0, /* */ + NULL /* pointer to next testcase */ +}; + +/* + * KAT values for AES self-test. These + * values we're derived from independent test code + * using OpenSSL. + */ +/* clang-format off */ +static const uint8_t srtp_aes_gcm_128_test_case_0_key[SRTP_AES_GCM_128_KEY_LEN_WSALT] = { + 0xfe, 0xff, 0xe9, 0x92, 0x86, 0x65, 0x73, 0x1c, + 0x6d, 0x6a, 0x8f, 0x94, 0x67, 0x30, 0x83, 0x08, + 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, + 0x09, 0x0a, 0x0b, 0x0c, +}; +/* clang-format on */ + +/* clang-format off */ +static uint8_t srtp_aes_gcm_128_test_case_0_iv[12] = { + 0xca, 0xfe, 0xba, 0xbe, 0xfa, 0xce, 0xdb, 0xad, + 0xde, 0xca, 0xf8, 0x88 +}; +/* clang-format on */ + +/* clang-format off */ +static const uint8_t srtp_aes_gcm_128_test_case_0_plaintext[60] = { + 0xd9, 0x31, 0x32, 0x25, 0xf8, 0x84, 0x06, 0xe5, + 0xa5, 0x59, 0x09, 0xc5, 0xaf, 0xf5, 0x26, 0x9a, + 0x86, 0xa7, 0xa9, 0x53, 0x15, 0x34, 0xf7, 0xda, + 0x2e, 0x4c, 0x30, 0x3d, 0x8a, 0x31, 0x8a, 0x72, + 0x1c, 0x3c, 0x0c, 0x95, 0x95, 0x68, 0x09, 0x53, + 0x2f, 0xcf, 0x0e, 0x24, 0x49, 0xa6, 0xb5, 0x25, + 0xb1, 0x6a, 0xed, 0xf5, 0xaa, 0x0d, 0xe6, 0x57, + 0xba, 0x63, 0x7b, 0x39 +}; + +/* clang-format off */ +static const uint8_t srtp_aes_gcm_128_test_case_0_aad[20] = { + 0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef, + 0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef, + 0xab, 0xad, 0xda, 0xd2 +}; +/* clang-format on */ + +/* clang-format off */ +static const uint8_t srtp_aes_gcm_128_test_case_0_ciphertext[76] = { + 0x42, 0x83, 0x1e, 0xc2, 0x21, 0x77, 0x74, 0x24, + 0x4b, 0x72, 0x21, 0xb7, 0x84, 0xd0, 0xd4, 0x9c, + 0xe3, 0xaa, 0x21, 0x2f, 0x2c, 0x02, 0xa4, 0xe0, + 0x35, 0xc1, 0x7e, 0x23, 0x29, 0xac, 0xa1, 0x2e, + 0x21, 0xd5, 0x14, 0xb2, 0x54, 0x66, 0x93, 0x1c, + 0x7d, 0x8f, 0x6a, 0x5a, 0xac, 0x84, 0xaa, 0x05, + 0x1b, 0xa3, 0x0b, 0x39, 0x6a, 0x0a, 0xac, 0x97, + 0x3d, 0x58, 0xe0, 0x91, + /* the last 16 bytes are the tag */ + 0x5b, 0xc9, 0x4f, 0xbc, 0x32, 0x21, 0xa5, 0xdb, + 0x94, 0xfa, 0xe9, 0x5a, 0xe7, 0x12, 0x1a, 0x47, +}; +/* clang-format on */ + +static const srtp_cipher_test_case_t srtp_aes_gcm_128_test_case_0a = { + SRTP_AES_GCM_128_KEY_LEN_WSALT, /* octets in key */ + srtp_aes_gcm_128_test_case_0_key, /* key */ + srtp_aes_gcm_128_test_case_0_iv, /* packet index */ + 60, /* octets in plaintext */ + srtp_aes_gcm_128_test_case_0_plaintext, /* plaintext */ + 68, /* octets in ciphertext */ + srtp_aes_gcm_128_test_case_0_ciphertext, /* ciphertext + tag */ + 20, /* octets in AAD */ + srtp_aes_gcm_128_test_case_0_aad, /* AAD */ + 8, /* */ + NULL /* pointer to next testcase */ +}; + +const srtp_cipher_test_case_t srtp_aes_gcm_128_test_case_0 = { + SRTP_AES_GCM_128_KEY_LEN_WSALT, /* octets in key */ + srtp_aes_gcm_128_test_case_0_key, /* key */ + srtp_aes_gcm_128_test_case_0_iv, /* packet index */ + 60, /* octets in plaintext */ + srtp_aes_gcm_128_test_case_0_plaintext, /* plaintext */ + 76, /* octets in ciphertext */ + srtp_aes_gcm_128_test_case_0_ciphertext, /* ciphertext + tag */ + 20, /* octets in AAD */ + srtp_aes_gcm_128_test_case_0_aad, /* AAD */ + 16, /* */ + &srtp_aes_gcm_128_test_case_0a /* pointer to next testcase */ +}; + +/* clang-format off */ +static const uint8_t srtp_aes_gcm_256_test_case_0_key[SRTP_AES_GCM_256_KEY_LEN_WSALT] = { + 0xfe, 0xff, 0xe9, 0x92, 0x86, 0x65, 0x73, 0x1c, + 0xa5, 0x59, 0x09, 0xc5, 0x54, 0x66, 0x93, 0x1c, + 0xaf, 0xf5, 0x26, 0x9a, 0x21, 0xd5, 0x14, 0xb2, + 0x6d, 0x6a, 0x8f, 0x94, 0x67, 0x30, 0x83, 0x08, + 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, + 0x09, 0x0a, 0x0b, 0x0c, +}; +/* clang-format on */ + +/* clang-format off */ +static uint8_t srtp_aes_gcm_256_test_case_0_iv[12] = { + 0xca, 0xfe, 0xba, 0xbe, 0xfa, 0xce, 0xdb, 0xad, + 0xde, 0xca, 0xf8, 0x88 +}; +/* clang-format on */ + +/* clang-format off */ +static const uint8_t srtp_aes_gcm_256_test_case_0_plaintext[60] = { + 0xd9, 0x31, 0x32, 0x25, 0xf8, 0x84, 0x06, 0xe5, + 0xa5, 0x59, 0x09, 0xc5, 0xaf, 0xf5, 0x26, 0x9a, + 0x86, 0xa7, 0xa9, 0x53, 0x15, 0x34, 0xf7, 0xda, + 0x2e, 0x4c, 0x30, 0x3d, 0x8a, 0x31, 0x8a, 0x72, + 0x1c, 0x3c, 0x0c, 0x95, 0x95, 0x68, 0x09, 0x53, + 0x2f, 0xcf, 0x0e, 0x24, 0x49, 0xa6, 0xb5, 0x25, + 0xb1, 0x6a, 0xed, 0xf5, 0xaa, 0x0d, 0xe6, 0x57, + 0xba, 0x63, 0x7b, 0x39 +}; +/* clang-format on */ + +/* clang-format off */ +static const uint8_t srtp_aes_gcm_256_test_case_0_aad[20] = { + 0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef, + 0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef, + 0xab, 0xad, 0xda, 0xd2 +}; +/* clang-format on */ + +/* clang-format off */ +static const uint8_t srtp_aes_gcm_256_test_case_0_ciphertext[76] = { + 0x0b, 0x11, 0xcf, 0xaf, 0x68, 0x4d, 0xae, 0x46, + 0xc7, 0x90, 0xb8, 0x8e, 0xb7, 0x6a, 0x76, 0x2a, + 0x94, 0x82, 0xca, 0xab, 0x3e, 0x39, 0xd7, 0x86, + 0x1b, 0xc7, 0x93, 0xed, 0x75, 0x7f, 0x23, 0x5a, + 0xda, 0xfd, 0xd3, 0xe2, 0x0e, 0x80, 0x87, 0xa9, + 0x6d, 0xd7, 0xe2, 0x6a, 0x7d, 0x5f, 0xb4, 0x80, + 0xef, 0xef, 0xc5, 0x29, 0x12, 0xd1, 0xaa, 0x10, + 0x09, 0xc9, 0x86, 0xc1, + /* the last 16 bytes are the tag */ + 0x45, 0xbc, 0x03, 0xe6, 0xe1, 0xac, 0x0a, 0x9f, + 0x81, 0xcb, 0x8e, 0x5b, 0x46, 0x65, 0x63, 0x1d, +}; +/* clang-format on */ + +static const srtp_cipher_test_case_t srtp_aes_gcm_256_test_case_0a = { + SRTP_AES_GCM_256_KEY_LEN_WSALT, /* octets in key */ + srtp_aes_gcm_256_test_case_0_key, /* key */ + srtp_aes_gcm_256_test_case_0_iv, /* packet index */ + 60, /* octets in plaintext */ + srtp_aes_gcm_256_test_case_0_plaintext, /* plaintext */ + 68, /* octets in ciphertext */ + srtp_aes_gcm_256_test_case_0_ciphertext, /* ciphertext + tag */ + 20, /* octets in AAD */ + srtp_aes_gcm_256_test_case_0_aad, /* AAD */ + 8, /* */ + NULL /* pointer to next testcase */ +}; + +const srtp_cipher_test_case_t srtp_aes_gcm_256_test_case_0 = { + SRTP_AES_GCM_256_KEY_LEN_WSALT, /* octets in key */ + srtp_aes_gcm_256_test_case_0_key, /* key */ + srtp_aes_gcm_256_test_case_0_iv, /* packet index */ + 60, /* octets in plaintext */ + srtp_aes_gcm_256_test_case_0_plaintext, /* plaintext */ + 76, /* octets in ciphertext */ + srtp_aes_gcm_256_test_case_0_ciphertext, /* ciphertext + tag */ + 20, /* octets in AAD */ + srtp_aes_gcm_256_test_case_0_aad, /* AAD */ + 16, /* */ + &srtp_aes_gcm_256_test_case_0a /* pointer to next testcase */ +}; diff --git a/third_party/libsrtp/src/crypto/cipher/cipher_test_cases.h b/third_party/libsrtp/src/crypto/cipher/cipher_test_cases.h new file mode 100644 index 0000000000..c8a9284002 --- /dev/null +++ b/third_party/libsrtp/src/crypto/cipher/cipher_test_cases.h @@ -0,0 +1,53 @@ +/* + * + * Copyright (c) 2013-2021, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef CHIPHER_TEST_CASES_H +#define CHIPHER_TEST_CASES_H + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "cipher.h" + +extern const srtp_cipher_test_case_t srtp_aes_icm_128_test_case_0; +extern const srtp_cipher_test_case_t srtp_aes_icm_192_test_case_0; +extern const srtp_cipher_test_case_t srtp_aes_icm_256_test_case_0; + +extern const srtp_cipher_test_case_t srtp_aes_gcm_128_test_case_0; +extern const srtp_cipher_test_case_t srtp_aes_gcm_256_test_case_0; + +#endif diff --git a/third_party/libsrtp/src/crypto/cipher/null_cipher.c b/third_party/libsrtp/src/crypto/cipher/null_cipher.c new file mode 100644 index 0000000000..969724611c --- /dev/null +++ b/third_party/libsrtp/src/crypto/cipher/null_cipher.c @@ -0,0 +1,153 @@ +/* + * null_cipher.c + * + * A null cipher implementation. This cipher leaves the plaintext + * unchanged. + * + * David A. McGrew + * Cisco Systems, Inc. + */ + +/* + * + * Copyright (c) 2001-2017 Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "datatypes.h" +#include "null_cipher.h" +#include "err.h" /* for srtp_debug */ +#include "alloc.h" +#include "cipher_types.h" + +static srtp_err_status_t srtp_null_cipher_alloc(srtp_cipher_t **c, + int key_len, + int tlen) +{ + extern const srtp_cipher_type_t srtp_null_cipher; + + debug_print(srtp_mod_cipher, "allocating cipher with key length %d", + key_len); + + /* allocate memory a cipher of type null_cipher */ + *c = (srtp_cipher_t *)srtp_crypto_alloc(sizeof(srtp_cipher_t)); + if (*c == NULL) { + return srtp_err_status_alloc_fail; + } + + /* set pointers */ + (*c)->algorithm = SRTP_NULL_CIPHER; + (*c)->type = &srtp_null_cipher; + (*c)->state = (void *)0x1; /* The null cipher does not maintain state */ + + /* set key size */ + (*c)->key_len = key_len; + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_null_cipher_dealloc(srtp_cipher_t *c) +{ + extern const srtp_cipher_type_t srtp_null_cipher; + + /* zeroize entire state*/ + octet_string_set_to_zero(c, sizeof(srtp_cipher_t)); + + /* free memory of type null_cipher */ + srtp_crypto_free(c); + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_null_cipher_init(void *cv, const uint8_t *key) +{ + /* srtp_null_cipher_ctx_t *c = (srtp_null_cipher_ctx_t *)cv; */ + + debug_print0(srtp_mod_cipher, "initializing null cipher"); + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_null_cipher_set_iv(void *cv, + uint8_t *iv, + srtp_cipher_direction_t dir) +{ + /* srtp_null_cipher_ctx_t *c = (srtp_null_cipher_ctx_t *)cv; */ + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_null_cipher_encrypt(void *cv, + unsigned char *buf, + unsigned int *bytes_to_encr) +{ + /* srtp_null_cipher_ctx_t *c = (srtp_null_cipher_ctx_t *)cv; */ + return srtp_err_status_ok; +} + +static const char srtp_null_cipher_description[] = "null cipher"; + +static const srtp_cipher_test_case_t srtp_null_cipher_test_0 = { + 0, /* octets in key */ + NULL, /* key */ + 0, /* packet index */ + 0, /* octets in plaintext */ + NULL, /* plaintext */ + 0, /* octets in plaintext */ + NULL, /* ciphertext */ + 0, /* */ + NULL, /* */ + 0, /* */ + NULL /* pointer to next testcase */ +}; + +/* + * note: the decrypt function is idential to the encrypt function + */ + +const srtp_cipher_type_t srtp_null_cipher = { + srtp_null_cipher_alloc, /* */ + srtp_null_cipher_dealloc, /* */ + srtp_null_cipher_init, /* */ + 0, /* set_aad */ + srtp_null_cipher_encrypt, /* */ + srtp_null_cipher_encrypt, /* */ + srtp_null_cipher_set_iv, /* */ + 0, /* get_tag */ + srtp_null_cipher_description, /* */ + &srtp_null_cipher_test_0, /* */ + SRTP_NULL_CIPHER /* */ +}; diff --git a/third_party/libsrtp/src/crypto/hash/auth.c b/third_party/libsrtp/src/crypto/hash/auth.c new file mode 100644 index 0000000000..9be0ccfd36 --- /dev/null +++ b/third_party/libsrtp/src/crypto/hash/auth.c @@ -0,0 +1,193 @@ +/* + * auth.c + * + * some bookkeeping functions for authentication functions + * + * David A. McGrew + * Cisco Systems, Inc. + */ + +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "auth.h" +#include "err.h" /* for srtp_debug */ +#include "datatypes.h" /* for octet_string */ + +/* the debug module for authentiation */ + +srtp_debug_module_t srtp_mod_auth = { + 0, /* debugging is off by default */ + "auth func" /* printable name for module */ +}; + +int srtp_auth_get_key_length(const srtp_auth_t *a) +{ + return a->key_len; +} + +int srtp_auth_get_tag_length(const srtp_auth_t *a) +{ + return a->out_len; +} + +int srtp_auth_get_prefix_length(const srtp_auth_t *a) +{ + return a->prefix_len; +} + +/* + * srtp_auth_type_test() tests an auth function of type ct against + * test cases provided in a list test_data of values of key, data, and tag + * that is known to be good + */ + +/* should be big enough for most occasions */ +#define SELF_TEST_TAG_BUF_OCTETS 32 + +srtp_err_status_t srtp_auth_type_test(const srtp_auth_type_t *at, + const srtp_auth_test_case_t *test_data) +{ + const srtp_auth_test_case_t *test_case = test_data; + srtp_auth_t *a; + srtp_err_status_t status; + uint8_t tag[SELF_TEST_TAG_BUF_OCTETS]; + int i, case_num = 0; + + debug_print(srtp_mod_auth, "running self-test for auth function %s", + at->description); + + /* + * check to make sure that we have at least one test case, and + * return an error if we don't - we need to be paranoid here + */ + if (test_case == NULL) { + return srtp_err_status_cant_check; + } + + /* loop over all test cases */ + while (test_case != NULL) { + /* check test case parameters */ + if (test_case->tag_length_octets > SELF_TEST_TAG_BUF_OCTETS) { + return srtp_err_status_bad_param; + } + + /* allocate auth */ + status = srtp_auth_type_alloc(at, &a, test_case->key_length_octets, + test_case->tag_length_octets); + if (status) { + return status; + } + + /* initialize auth */ + status = srtp_auth_init(a, test_case->key); + if (status) { + srtp_auth_dealloc(a); + return status; + } + + status = srtp_auth_start(a); + if (status) { + srtp_auth_dealloc(a); + return status; + } + + /* zeroize tag then compute */ + octet_string_set_to_zero(tag, test_case->tag_length_octets); + status = srtp_auth_compute(a, test_case->data, + test_case->data_length_octets, tag); + if (status) { + srtp_auth_dealloc(a); + return status; + } + + debug_print(srtp_mod_auth, "key: %s", + srtp_octet_string_hex_string(test_case->key, + test_case->key_length_octets)); + debug_print(srtp_mod_auth, "data: %s", + srtp_octet_string_hex_string( + test_case->data, test_case->data_length_octets)); + debug_print( + srtp_mod_auth, "tag computed: %s", + srtp_octet_string_hex_string(tag, test_case->tag_length_octets)); + debug_print(srtp_mod_auth, "tag expected: %s", + srtp_octet_string_hex_string(test_case->tag, + test_case->tag_length_octets)); + + /* check the result */ + status = srtp_err_status_ok; + for (i = 0; i < test_case->tag_length_octets; i++) { + if (tag[i] != test_case->tag[i]) { + status = srtp_err_status_algo_fail; + debug_print(srtp_mod_auth, "test case %d failed", case_num); + debug_print(srtp_mod_auth, " (mismatch at octet %d)", i); + } + } + if (status) { + srtp_auth_dealloc(a); + return srtp_err_status_algo_fail; + } + + /* deallocate the auth function */ + status = srtp_auth_dealloc(a); + if (status) { + return status; + } + + /* + * the auth function passed the test case, so move on to the next test + * case in the list; if NULL, we'll quit and return an OK + */ + test_case = test_case->next_test_case; + ++case_num; + } + + return srtp_err_status_ok; +} + +/* + * srtp_auth_type_self_test(at) performs srtp_auth_type_test on at's internal + * list of test data. + */ + +srtp_err_status_t srtp_auth_type_self_test(const srtp_auth_type_t *at) +{ + return srtp_auth_type_test(at, at->test_data); +} diff --git a/third_party/libsrtp/src/crypto/hash/auth_test_cases.c b/third_party/libsrtp/src/crypto/hash/auth_test_cases.c new file mode 100644 index 0000000000..22b9418434 --- /dev/null +++ b/third_party/libsrtp/src/crypto/hash/auth_test_cases.c @@ -0,0 +1,70 @@ +/* + * + * Copyright (c) 2013-2021, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#include "auth_test_cases.h" +#include <stddef.h> + +/* clang-format off */ +static const uint8_t srtp_hmac_test_case_0_key[20] = { + 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, + 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, + 0x0b, 0x0b, 0x0b, 0x0b +}; +/* clang-format on */ + +/* clang-format off */ +static const uint8_t srtp_hmac_test_case_0_data[8] = { + 0x48, 0x69, 0x20, 0x54, 0x68, 0x65, 0x72, 0x65 /* "Hi There" */ +}; +/* clang-format on */ + +/* clang-format off */ +static const uint8_t srtp_hmac_test_case_0_tag[20] = { + 0xb6, 0x17, 0x31, 0x86, 0x55, 0x05, 0x72, 0x64, + 0xe2, 0x8b, 0xc0, 0xb6, 0xfb, 0x37, 0x8c, 0x8e, + 0xf1, 0x46, 0xbe, 0x00 +}; +/* clang-format on */ + +const srtp_auth_test_case_t srtp_hmac_test_case_0 = { + sizeof(srtp_hmac_test_case_0_key), /* octets in key */ + srtp_hmac_test_case_0_key, /* key */ + sizeof(srtp_hmac_test_case_0_data), /* octets in data */ + srtp_hmac_test_case_0_data, /* data */ + sizeof(srtp_hmac_test_case_0_tag), /* octets in tag */ + srtp_hmac_test_case_0_tag, /* tag */ + NULL /* pointer to next testcase */ +}; diff --git a/third_party/libsrtp/src/crypto/hash/auth_test_cases.h b/third_party/libsrtp/src/crypto/hash/auth_test_cases.h new file mode 100644 index 0000000000..9f37718205 --- /dev/null +++ b/third_party/libsrtp/src/crypto/hash/auth_test_cases.h @@ -0,0 +1,48 @@ +/* + * + * Copyright (c) 2013-2021, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef AUTH_TEST_CASES_H +#define AUTH_TEST_CASES_H + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "auth.h" + +extern const srtp_auth_test_case_t srtp_hmac_test_case_0; + +#endif diff --git a/third_party/libsrtp/src/crypto/hash/hmac.c b/third_party/libsrtp/src/crypto/hash/hmac.c new file mode 100644 index 0000000000..269c3f6a71 --- /dev/null +++ b/third_party/libsrtp/src/crypto/hash/hmac.c @@ -0,0 +1,249 @@ +/* + * hmac.c + * + * implementation of hmac srtp_auth_type_t + * + * David A. McGrew + * Cisco Systems, Inc. + */ +/* + * + * Copyright(c) 2001-2017 Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "hmac.h" +#include "alloc.h" +#include "cipher_types.h" +#include "auth_test_cases.h" + +/* the debug module for authentiation */ + +srtp_debug_module_t srtp_mod_hmac = { + 0, /* debugging is off by default */ + "hmac sha-1" /* printable name for module */ +}; + +static srtp_err_status_t srtp_hmac_alloc(srtp_auth_t **a, + int key_len, + int out_len) +{ + extern const srtp_auth_type_t srtp_hmac; + uint8_t *pointer; + + debug_print(srtp_mod_hmac, "allocating auth func with key length %d", + key_len); + debug_print(srtp_mod_hmac, " tag length %d", + out_len); + + /* + * check key length - note that we don't support keys larger + * than 20 bytes yet + */ + if (key_len > 20) { + return srtp_err_status_bad_param; + } + + /* check output length - should be less than 20 bytes */ + if (out_len > 20) { + return srtp_err_status_bad_param; + } + + /* allocate memory for auth and srtp_hmac_ctx_t structures */ + pointer = (uint8_t *)srtp_crypto_alloc(sizeof(srtp_hmac_ctx_t) + + sizeof(srtp_auth_t)); + if (pointer == NULL) { + return srtp_err_status_alloc_fail; + } + + /* set pointers */ + *a = (srtp_auth_t *)pointer; + (*a)->type = &srtp_hmac; + (*a)->state = pointer + sizeof(srtp_auth_t); + (*a)->out_len = out_len; + (*a)->key_len = key_len; + (*a)->prefix_len = 0; + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_hmac_dealloc(srtp_auth_t *a) +{ + /* zeroize entire state*/ + octet_string_set_to_zero(a, sizeof(srtp_hmac_ctx_t) + sizeof(srtp_auth_t)); + + /* free memory */ + srtp_crypto_free(a); + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_hmac_init(void *statev, + const uint8_t *key, + int key_len) +{ + srtp_hmac_ctx_t *state = (srtp_hmac_ctx_t *)statev; + int i; + uint8_t ipad[64]; + + /* + * check key length - note that we don't support keys larger + * than 20 bytes yet + */ + if (key_len > 20) { + return srtp_err_status_bad_param; + } + + /* + * set values of ipad and opad by exoring the key into the + * appropriate constant values + */ + for (i = 0; i < key_len; i++) { + ipad[i] = key[i] ^ 0x36; + state->opad[i] = key[i] ^ 0x5c; + } + /* set the rest of ipad, opad to constant values */ + for (; i < 64; i++) { + ipad[i] = 0x36; + ((uint8_t *)state->opad)[i] = 0x5c; + } + + debug_print(srtp_mod_hmac, "ipad: %s", + srtp_octet_string_hex_string(ipad, 64)); + + /* initialize sha1 context */ + srtp_sha1_init(&state->init_ctx); + + /* hash ipad ^ key */ + srtp_sha1_update(&state->init_ctx, ipad, 64); + memcpy(&state->ctx, &state->init_ctx, sizeof(srtp_sha1_ctx_t)); + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_hmac_start(void *statev) +{ + srtp_hmac_ctx_t *state = (srtp_hmac_ctx_t *)statev; + + memcpy(&state->ctx, &state->init_ctx, sizeof(srtp_sha1_ctx_t)); + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_hmac_update(void *statev, + const uint8_t *message, + int msg_octets) +{ + srtp_hmac_ctx_t *state = (srtp_hmac_ctx_t *)statev; + + debug_print(srtp_mod_hmac, "input: %s", + srtp_octet_string_hex_string(message, msg_octets)); + + /* hash message into sha1 context */ + srtp_sha1_update(&state->ctx, message, msg_octets); + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_hmac_compute(void *statev, + const uint8_t *message, + int msg_octets, + int tag_len, + uint8_t *result) +{ + srtp_hmac_ctx_t *state = (srtp_hmac_ctx_t *)statev; + uint32_t hash_value[5]; + uint32_t H[5]; + int i; + + /* check tag length, return error if we can't provide the value expected */ + if (tag_len > 20) { + return srtp_err_status_bad_param; + } + + /* hash message, copy output into H */ + srtp_hmac_update(state, message, msg_octets); + srtp_sha1_final(&state->ctx, H); + + /* + * note that we don't need to debug_print() the input, since the + * function hmac_update() already did that for us + */ + debug_print(srtp_mod_hmac, "intermediate state: %s", + srtp_octet_string_hex_string((uint8_t *)H, 20)); + + /* re-initialize hash context */ + srtp_sha1_init(&state->ctx); + + /* hash opad ^ key */ + srtp_sha1_update(&state->ctx, (uint8_t *)state->opad, 64); + + /* hash the result of the inner hash */ + srtp_sha1_update(&state->ctx, (uint8_t *)H, 20); + + /* the result is returned in the array hash_value[] */ + srtp_sha1_final(&state->ctx, hash_value); + + /* copy hash_value to *result */ + for (i = 0; i < tag_len; i++) { + result[i] = ((uint8_t *)hash_value)[i]; + } + + debug_print(srtp_mod_hmac, "output: %s", + srtp_octet_string_hex_string((uint8_t *)hash_value, tag_len)); + + return srtp_err_status_ok; +} + +static const char srtp_hmac_description[] = + "hmac sha-1 authentication function"; + +/* + * srtp_auth_type_t hmac is the hmac metaobject + */ + +const srtp_auth_type_t srtp_hmac = { + srtp_hmac_alloc, /* */ + srtp_hmac_dealloc, /* */ + srtp_hmac_init, /* */ + srtp_hmac_compute, /* */ + srtp_hmac_update, /* */ + srtp_hmac_start, /* */ + srtp_hmac_description, /* */ + &srtp_hmac_test_case_0, /* */ + SRTP_HMAC_SHA1 /* */ +}; diff --git a/third_party/libsrtp/src/crypto/hash/hmac_mbedtls.c b/third_party/libsrtp/src/crypto/hash/hmac_mbedtls.c new file mode 100644 index 0000000000..f710be9c78 --- /dev/null +++ b/third_party/libsrtp/src/crypto/hash/hmac_mbedtls.c @@ -0,0 +1,221 @@ +/* + * hmac_mbedtls.c + * + * Implementation of hmac srtp_auth_type_t that leverages Mbedtls + * + * YongCheng Yang + */ +/* + * + * Copyright(c) 2013-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "auth.h" +#include "alloc.h" +#include "err.h" /* for srtp_debug */ +#include "auth_test_cases.h" +#include <mbedtls/md.h> + +#define SHA1_DIGEST_SIZE 20 + +/* the debug module for authentiation */ + +srtp_debug_module_t srtp_mod_hmac = { + 0, /* debugging is off by default */ + "hmac sha-1 mbedtls" /* printable name for module */ +}; + +static srtp_err_status_t srtp_hmac_mbedtls_alloc(srtp_auth_t **a, + int key_len, + int out_len) +{ + extern const srtp_auth_type_t srtp_hmac; + + debug_print(srtp_mod_hmac, "allocating auth func with key length %d", + key_len); + debug_print(srtp_mod_hmac, " tag length %d", + out_len); + + /* check output length - should be less than 20 bytes */ + if (key_len > SHA1_DIGEST_SIZE) { + return srtp_err_status_bad_param; + } + /* check output length - should be less than 20 bytes */ + if (out_len > SHA1_DIGEST_SIZE) { + return srtp_err_status_bad_param; + } + + *a = (srtp_auth_t *)srtp_crypto_alloc(sizeof(srtp_auth_t)); + if (*a == NULL) { + return srtp_err_status_alloc_fail; + } + // allocate the buffer of mbedtls context. + (*a)->state = srtp_crypto_alloc(sizeof(mbedtls_md_context_t)); + if ((*a)->state == NULL) { + srtp_crypto_free(*a); + *a = NULL; + return srtp_err_status_alloc_fail; + } + mbedtls_md_init((mbedtls_md_context_t *)(*a)->state); + + /* set pointers */ + (*a)->type = &srtp_hmac; + (*a)->out_len = out_len; + (*a)->key_len = key_len; + (*a)->prefix_len = 0; + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_hmac_mbedtls_dealloc(srtp_auth_t *a) +{ + mbedtls_md_context_t *hmac_ctx; + hmac_ctx = (mbedtls_md_context_t *)a->state; + mbedtls_md_free(hmac_ctx); + srtp_crypto_free(hmac_ctx); + /* zeroize entire state*/ + octet_string_set_to_zero(a, sizeof(srtp_auth_t)); + + /* free memory */ + srtp_crypto_free(a); + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_hmac_mbedtls_start(void *statev) +{ + mbedtls_md_context_t *state = (mbedtls_md_context_t *)statev; + if (mbedtls_md_hmac_reset(state) != 0) + return srtp_err_status_auth_fail; + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_hmac_mbedtls_init(void *statev, + const uint8_t *key, + int key_len) +{ + mbedtls_md_context_t *state = (mbedtls_md_context_t *)statev; + const mbedtls_md_info_t *info = NULL; + + info = mbedtls_md_info_from_type(MBEDTLS_MD_SHA1); + if (info == NULL) + return srtp_err_status_auth_fail; + + if (mbedtls_md_setup(state, info, 1) != 0) + return srtp_err_status_auth_fail; + + debug_print(srtp_mod_hmac, "mbedtls setup, name: %s", + mbedtls_md_get_name(info)); + debug_print(srtp_mod_hmac, "mbedtls setup, size: %d", + mbedtls_md_get_size(info)); + + if (mbedtls_md_hmac_starts(state, key, key_len) != 0) + return srtp_err_status_auth_fail; + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_hmac_mbedtls_update(void *statev, + const uint8_t *message, + int msg_octets) +{ + mbedtls_md_context_t *state = (mbedtls_md_context_t *)statev; + + debug_print(srtp_mod_hmac, "input: %s", + srtp_octet_string_hex_string(message, msg_octets)); + + if (mbedtls_md_hmac_update(state, message, msg_octets) != 0) + return srtp_err_status_auth_fail; + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_hmac_mbedtls_compute(void *statev, + const uint8_t *message, + int msg_octets, + int tag_len, + uint8_t *result) +{ + mbedtls_md_context_t *state = (mbedtls_md_context_t *)statev; + uint8_t hash_value[SHA1_DIGEST_SIZE]; + int i; + + /* check tag length, return error if we can't provide the value expected */ + if (tag_len > SHA1_DIGEST_SIZE) { + return srtp_err_status_bad_param; + } + + /* hash message, copy output into H */ + if (mbedtls_md_hmac_update(statev, message, msg_octets) != 0) + return srtp_err_status_auth_fail; + + if (mbedtls_md_hmac_finish(state, hash_value) != 0) + return srtp_err_status_auth_fail; + + /* copy hash_value to *result */ + for (i = 0; i < tag_len; i++) { + result[i] = hash_value[i]; + } + + debug_print(srtp_mod_hmac, "output: %s", + srtp_octet_string_hex_string(hash_value, tag_len)); + + return srtp_err_status_ok; +} + +/* end test case 0 */ + +static const char srtp_hmac_mbedtls_description[] = + "hmac sha-1 authentication function using mbedtls"; + +/* + * srtp_auth_type_t hmac is the hmac metaobject + */ + +const srtp_auth_type_t srtp_hmac = { + srtp_hmac_mbedtls_alloc, /* */ + srtp_hmac_mbedtls_dealloc, /* */ + srtp_hmac_mbedtls_init, /* */ + srtp_hmac_mbedtls_compute, /* */ + srtp_hmac_mbedtls_update, /* */ + srtp_hmac_mbedtls_start, /* */ + srtp_hmac_mbedtls_description, /* */ + &srtp_hmac_test_case_0, /* */ + SRTP_HMAC_SHA1 /* */ +}; diff --git a/third_party/libsrtp/src/crypto/hash/hmac_nss.c b/third_party/libsrtp/src/crypto/hash/hmac_nss.c new file mode 100644 index 0000000000..8d1e42f620 --- /dev/null +++ b/third_party/libsrtp/src/crypto/hash/hmac_nss.c @@ -0,0 +1,290 @@ +/* + * + * Copyright(c) 2013-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "auth.h" +#include "alloc.h" +#include "err.h" /* for srtp_debug */ +#include "auth_test_cases.h" + +#define NSS_PKCS11_2_0_COMPAT 1 + +#include <nss.h> +#include <pk11pub.h> + +#define SHA1_DIGEST_SIZE 20 + +/* the debug module for authentiation */ + +srtp_debug_module_t srtp_mod_hmac = { + 0, /* debugging is off by default */ + "hmac sha-1 nss" /* printable name for module */ +}; + +typedef struct { + NSSInitContext *nss; + PK11SymKey *key; + PK11Context *ctx; +} srtp_hmac_nss_ctx_t; + +static srtp_err_status_t srtp_hmac_alloc(srtp_auth_t **a, + int key_len, + int out_len) +{ + extern const srtp_auth_type_t srtp_hmac; + srtp_hmac_nss_ctx_t *hmac; + NSSInitContext *nss; + + debug_print(srtp_mod_hmac, "allocating auth func with key length %d", + key_len); + debug_print(srtp_mod_hmac, " tag length %d", + out_len); + + /* check output length - should be less than 20 bytes */ + if (out_len > SHA1_DIGEST_SIZE) { + return srtp_err_status_bad_param; + } + + /* Initialize NSS equiv of NSS_NoDB_Init(NULL) */ + nss = NSS_InitContext("", "", "", "", NULL, + NSS_INIT_READONLY | NSS_INIT_NOCERTDB | + NSS_INIT_NOMODDB | NSS_INIT_FORCEOPEN | + NSS_INIT_OPTIMIZESPACE); + if (!nss) { + return srtp_err_status_auth_fail; + } + + *a = (srtp_auth_t *)srtp_crypto_alloc(sizeof(srtp_auth_t)); + if (*a == NULL) { + NSS_ShutdownContext(nss); + return srtp_err_status_alloc_fail; + } + + hmac = + (srtp_hmac_nss_ctx_t *)srtp_crypto_alloc(sizeof(srtp_hmac_nss_ctx_t)); + if (hmac == NULL) { + NSS_ShutdownContext(nss); + srtp_crypto_free(*a); + *a = NULL; + return srtp_err_status_alloc_fail; + } + + hmac->nss = nss; + hmac->key = NULL; + hmac->ctx = NULL; + + /* set pointers */ + (*a)->state = hmac; + (*a)->type = &srtp_hmac; + (*a)->out_len = out_len; + (*a)->key_len = key_len; + (*a)->prefix_len = 0; + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_hmac_dealloc(srtp_auth_t *a) +{ + srtp_hmac_nss_ctx_t *hmac; + + hmac = (srtp_hmac_nss_ctx_t *)a->state; + if (hmac) { + /* free any PK11 values that have been created */ + if (hmac->key) { + PK11_FreeSymKey(hmac->key); + hmac->key = NULL; + } + + if (hmac->ctx) { + PK11_DestroyContext(hmac->ctx, PR_TRUE); + hmac->ctx = NULL; + } + + if (hmac->nss) { + NSS_ShutdownContext(hmac->nss); + hmac->nss = NULL; + } + + /* zeroize everything */ + octet_string_set_to_zero(hmac, sizeof(srtp_hmac_nss_ctx_t)); + srtp_crypto_free(hmac); + } + + /* free memory */ + srtp_crypto_free(a); + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_hmac_start(void *statev) +{ + srtp_hmac_nss_ctx_t *hmac; + hmac = (srtp_hmac_nss_ctx_t *)statev; + + if (PK11_DigestBegin(hmac->ctx) != SECSuccess) { + return srtp_err_status_auth_fail; + } + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_hmac_init(void *statev, + const uint8_t *key, + int key_len) +{ + srtp_hmac_nss_ctx_t *hmac; + hmac = (srtp_hmac_nss_ctx_t *)statev; + PK11SymKey *sym_key; + PK11Context *ctx; + + if (hmac->ctx) { + PK11_DestroyContext(hmac->ctx, PR_TRUE); + hmac->ctx = NULL; + } + + if (hmac->key) { + PK11_FreeSymKey(hmac->key); + hmac->key = NULL; + } + + PK11SlotInfo *slot = PK11_GetBestSlot(CKM_SHA_1_HMAC, NULL); + if (!slot) { + return srtp_err_status_bad_param; + } + + SECItem key_item = { siBuffer, (unsigned char *)key, key_len }; + sym_key = PK11_ImportSymKey(slot, CKM_SHA_1_HMAC, PK11_OriginUnwrap, + CKA_SIGN, &key_item, NULL); + PK11_FreeSlot(slot); + + if (!sym_key) { + return srtp_err_status_auth_fail; + } + + SECItem param_item = { siBuffer, NULL, 0 }; + ctx = PK11_CreateContextBySymKey(CKM_SHA_1_HMAC, CKA_SIGN, sym_key, + ¶m_item); + if (!ctx) { + PK11_FreeSymKey(sym_key); + return srtp_err_status_auth_fail; + } + + hmac->key = sym_key; + hmac->ctx = ctx; + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_hmac_update(void *statev, + const uint8_t *message, + int msg_octets) +{ + srtp_hmac_nss_ctx_t *hmac; + hmac = (srtp_hmac_nss_ctx_t *)statev; + + debug_print(srtp_mod_hmac, "input: %s", + srtp_octet_string_hex_string(message, msg_octets)); + + if (PK11_DigestOp(hmac->ctx, message, msg_octets) != SECSuccess) { + return srtp_err_status_auth_fail; + } + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_hmac_compute(void *statev, + const uint8_t *message, + int msg_octets, + int tag_len, + uint8_t *result) +{ + srtp_hmac_nss_ctx_t *hmac; + hmac = (srtp_hmac_nss_ctx_t *)statev; + uint8_t hash_value[SHA1_DIGEST_SIZE]; + int i; + unsigned int len; + + debug_print(srtp_mod_hmac, "input: %s", + srtp_octet_string_hex_string(message, msg_octets)); + + /* check tag length, return error if we can't provide the value expected */ + if (tag_len > SHA1_DIGEST_SIZE) { + return srtp_err_status_bad_param; + } + + if (PK11_DigestOp(hmac->ctx, message, msg_octets) != SECSuccess) { + return srtp_err_status_auth_fail; + } + + if (PK11_DigestFinal(hmac->ctx, hash_value, &len, SHA1_DIGEST_SIZE) != + SECSuccess) { + return srtp_err_status_auth_fail; + } + + if (len < tag_len) + return srtp_err_status_auth_fail; + + /* copy hash_value to *result */ + for (i = 0; i < tag_len; i++) { + result[i] = hash_value[i]; + } + + debug_print(srtp_mod_hmac, "output: %s", + srtp_octet_string_hex_string(hash_value, tag_len)); + + return srtp_err_status_ok; +} + +static const char srtp_hmac_description[] = + "hmac sha-1 authentication function"; + +/* + * srtp_auth_type_t hmac is the hmac metaobject + */ + +const srtp_auth_type_t srtp_hmac = { + srtp_hmac_alloc, /* */ + srtp_hmac_dealloc, /* */ + srtp_hmac_init, /* */ + srtp_hmac_compute, /* */ + srtp_hmac_update, /* */ + srtp_hmac_start, /* */ + srtp_hmac_description, /* */ + &srtp_hmac_test_case_0, /* */ + SRTP_HMAC_SHA1 /* */ +}; diff --git a/third_party/libsrtp/src/crypto/hash/hmac_ossl.c b/third_party/libsrtp/src/crypto/hash/hmac_ossl.c new file mode 100644 index 0000000000..ee6b0b5851 --- /dev/null +++ b/third_party/libsrtp/src/crypto/hash/hmac_ossl.c @@ -0,0 +1,242 @@ +/* + * hmac_ossl.c + * + * Implementation of hmac srtp_auth_type_t that leverages OpenSSL + * + * John A. Foley + * Cisco Systems, Inc. + */ +/* + * + * Copyright(c) 2013-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "auth.h" +#include "alloc.h" +#include "err.h" /* for srtp_debug */ +#include "auth_test_cases.h" +#include <openssl/evp.h> +#include <openssl/hmac.h> + +#define SHA1_DIGEST_SIZE 20 + +/* the debug module for authentiation */ + +srtp_debug_module_t srtp_mod_hmac = { + 0, /* debugging is off by default */ + "hmac sha-1 openssl" /* printable name for module */ +}; + +static srtp_err_status_t srtp_hmac_alloc(srtp_auth_t **a, + int key_len, + int out_len) +{ + extern const srtp_auth_type_t srtp_hmac; + + debug_print(srtp_mod_hmac, "allocating auth func with key length %d", + key_len); + debug_print(srtp_mod_hmac, " tag length %d", + out_len); + + /* check output length - should be less than 20 bytes */ + if (out_len > SHA1_DIGEST_SIZE) { + return srtp_err_status_bad_param; + } + +/* OpenSSL 1.1.0 made HMAC_CTX an opaque structure, which must be allocated + using HMAC_CTX_new. But this function doesn't exist in OpenSSL 1.0.x. */ +#if OPENSSL_VERSION_NUMBER < 0x10100000L || LIBRESSL_VERSION_NUMBER + { + /* allocate memory for auth and HMAC_CTX structures */ + uint8_t *pointer; + HMAC_CTX *new_hmac_ctx; + pointer = (uint8_t *)srtp_crypto_alloc(sizeof(HMAC_CTX) + + sizeof(srtp_auth_t)); + if (pointer == NULL) { + return srtp_err_status_alloc_fail; + } + *a = (srtp_auth_t *)pointer; + (*a)->state = pointer + sizeof(srtp_auth_t); + new_hmac_ctx = (HMAC_CTX *)((*a)->state); + + HMAC_CTX_init(new_hmac_ctx); + } + +#else + *a = (srtp_auth_t *)srtp_crypto_alloc(sizeof(srtp_auth_t)); + if (*a == NULL) { + return srtp_err_status_alloc_fail; + } + + (*a)->state = HMAC_CTX_new(); + if ((*a)->state == NULL) { + srtp_crypto_free(*a); + *a = NULL; + return srtp_err_status_alloc_fail; + } +#endif + + /* set pointers */ + (*a)->type = &srtp_hmac; + (*a)->out_len = out_len; + (*a)->key_len = key_len; + (*a)->prefix_len = 0; + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_hmac_dealloc(srtp_auth_t *a) +{ + HMAC_CTX *hmac_ctx; + + hmac_ctx = (HMAC_CTX *)a->state; + +#if OPENSSL_VERSION_NUMBER < 0x10100000L || LIBRESSL_VERSION_NUMBER + HMAC_CTX_cleanup(hmac_ctx); + + /* zeroize entire state*/ + octet_string_set_to_zero(a, sizeof(HMAC_CTX) + sizeof(srtp_auth_t)); + +#else + HMAC_CTX_free(hmac_ctx); + + /* zeroize entire state*/ + octet_string_set_to_zero(a, sizeof(srtp_auth_t)); +#endif + + /* free memory */ + srtp_crypto_free(a); + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_hmac_start(void *statev) +{ + HMAC_CTX *state = (HMAC_CTX *)statev; + + if (HMAC_Init_ex(state, NULL, 0, NULL, NULL) == 0) + return srtp_err_status_auth_fail; + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_hmac_init(void *statev, + const uint8_t *key, + int key_len) +{ + HMAC_CTX *state = (HMAC_CTX *)statev; + + if (HMAC_Init_ex(state, key, key_len, EVP_sha1(), NULL) == 0) + return srtp_err_status_auth_fail; + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_hmac_update(void *statev, + const uint8_t *message, + int msg_octets) +{ + HMAC_CTX *state = (HMAC_CTX *)statev; + + debug_print(srtp_mod_hmac, "input: %s", + srtp_octet_string_hex_string(message, msg_octets)); + + if (HMAC_Update(state, message, msg_octets) == 0) + return srtp_err_status_auth_fail; + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_hmac_compute(void *statev, + const uint8_t *message, + int msg_octets, + int tag_len, + uint8_t *result) +{ + HMAC_CTX *state = (HMAC_CTX *)statev; + uint8_t hash_value[SHA1_DIGEST_SIZE]; + int i; + unsigned int len; + + debug_print(srtp_mod_hmac, "input: %s", + srtp_octet_string_hex_string(message, msg_octets)); + + /* check tag length, return error if we can't provide the value expected */ + if (tag_len > SHA1_DIGEST_SIZE) { + return srtp_err_status_bad_param; + } + + /* hash message, copy output into H */ + if (HMAC_Update(state, message, msg_octets) == 0) + return srtp_err_status_auth_fail; + + if (HMAC_Final(state, hash_value, &len) == 0) + return srtp_err_status_auth_fail; + + if (len < tag_len) + return srtp_err_status_auth_fail; + + /* copy hash_value to *result */ + for (i = 0; i < tag_len; i++) { + result[i] = hash_value[i]; + } + + debug_print(srtp_mod_hmac, "output: %s", + srtp_octet_string_hex_string(hash_value, tag_len)); + + return srtp_err_status_ok; +} + +static const char srtp_hmac_description[] = + "hmac sha-1 authentication function"; + +/* + * srtp_auth_type_t hmac is the hmac metaobject + */ + +const srtp_auth_type_t srtp_hmac = { + srtp_hmac_alloc, /* */ + srtp_hmac_dealloc, /* */ + srtp_hmac_init, /* */ + srtp_hmac_compute, /* */ + srtp_hmac_update, /* */ + srtp_hmac_start, /* */ + srtp_hmac_description, /* */ + &srtp_hmac_test_case_0, /* */ + SRTP_HMAC_SHA1 /* */ +}; diff --git a/third_party/libsrtp/src/crypto/hash/null_auth.c b/third_party/libsrtp/src/crypto/hash/null_auth.c new file mode 100644 index 0000000000..5194417caf --- /dev/null +++ b/third_party/libsrtp/src/crypto/hash/null_auth.c @@ -0,0 +1,168 @@ +/* + * null_auth.c + * + * implements the do-nothing auth algorithm + * + * David A. McGrew + * Cisco Systems, Inc. + * + */ + +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "null_auth.h" +#include "err.h" /* for srtp_debug */ +#include "alloc.h" +#include "cipher_types.h" + +static srtp_err_status_t srtp_null_auth_alloc(srtp_auth_t **a, + int key_len, + int out_len) +{ + extern const srtp_auth_type_t srtp_null_auth; + uint8_t *pointer; + + debug_print(srtp_mod_auth, "allocating auth func with key length %d", + key_len); + debug_print(srtp_mod_auth, " tag length %d", + out_len); + + /* allocate memory for auth and srtp_null_auth_ctx_t structures */ + pointer = (uint8_t *)srtp_crypto_alloc(sizeof(srtp_null_auth_ctx_t) + + sizeof(srtp_auth_t)); + if (pointer == NULL) { + return srtp_err_status_alloc_fail; + } + + /* set pointers */ + *a = (srtp_auth_t *)pointer; + (*a)->type = &srtp_null_auth; + (*a)->state = pointer + sizeof(srtp_auth_t); + (*a)->out_len = out_len; + (*a)->prefix_len = out_len; + (*a)->key_len = key_len; + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_null_auth_dealloc(srtp_auth_t *a) +{ + extern const srtp_auth_type_t srtp_null_auth; + + /* zeroize entire state*/ + octet_string_set_to_zero(a, sizeof(srtp_null_auth_ctx_t) + + sizeof(srtp_auth_t)); + + /* free memory */ + srtp_crypto_free(a); + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_null_auth_init(void *statev, + const uint8_t *key, + int key_len) +{ + /* srtp_null_auth_ctx_t *state = (srtp_null_auth_ctx_t *)statev; */ + /* accept any length of key, and do nothing */ + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_null_auth_compute(void *statev, + const uint8_t *message, + int msg_octets, + int tag_len, + uint8_t *result) +{ + /* srtp_null_auth_ctx_t *state = (srtp_null_auth_ctx_t *)statev; */ + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_null_auth_update(void *statev, + const uint8_t *message, + int msg_octets) +{ + /* srtp_null_auth_ctx_t *state = (srtp_null_auth_ctx_t *)statev; */ + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_null_auth_start(void *statev) +{ + /* srtp_null_auth_ctx_t *state = (srtp_null_auth_ctx_t *)statev; */ + + return srtp_err_status_ok; +} + +/* + * srtp_auth_type_t - defines description, test case, and null_auth + * metaobject + */ + +/* begin test case 0 */ + +static const srtp_auth_test_case_t srtp_null_auth_test_case_0 = { + 0, /* octets in key */ + NULL, /* key */ + 0, /* octets in data */ + NULL, /* data */ + 0, /* octets in tag */ + NULL, /* tag */ + NULL /* pointer to next testcase */ +}; + +/* end test case 0 */ + +static const char srtp_null_auth_description[] = "null authentication function"; + +const srtp_auth_type_t srtp_null_auth = { + srtp_null_auth_alloc, /* */ + srtp_null_auth_dealloc, /* */ + srtp_null_auth_init, /* */ + srtp_null_auth_compute, /* */ + srtp_null_auth_update, /* */ + srtp_null_auth_start, /* */ + srtp_null_auth_description, /* */ + &srtp_null_auth_test_case_0, /* */ + SRTP_NULL_AUTH /* */ +}; diff --git a/third_party/libsrtp/src/crypto/hash/sha1.c b/third_party/libsrtp/src/crypto/hash/sha1.c new file mode 100644 index 0000000000..901a933250 --- /dev/null +++ b/third_party/libsrtp/src/crypto/hash/sha1.c @@ -0,0 +1,463 @@ +/* + * sha1.c + * + * an implementation of the Secure Hash Algorithm v.1 (SHA-1), + * specified in FIPS 180-1 + * + * David A. McGrew + * Cisco Systems, Inc. + */ + +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "sha1.h" + +srtp_debug_module_t srtp_mod_sha1 = { + 0, /* debugging is off by default */ + "sha-1" /* printable module name */ +}; + +/* SN == Rotate left N bits */ +#define S1(X) ((X << 1) | (X >> 31)) +#define S5(X) ((X << 5) | (X >> 27)) +#define S30(X) ((X << 30) | (X >> 2)) + +#define f0(B, C, D) ((B & C) | (~B & D)) +#define f1(B, C, D) (B ^ C ^ D) +#define f2(B, C, D) ((B & C) | (B & D) | (C & D)) +#define f3(B, C, D) (B ^ C ^ D) + +/* + * nota bene: the variable K0 appears in the curses library, so we + * give longer names to these variables to avoid spurious warnings + * on systems that uses curses + */ + +uint32_t SHA_K0 = 0x5A827999; /* Kt for 0 <= t <= 19 */ +uint32_t SHA_K1 = 0x6ED9EBA1; /* Kt for 20 <= t <= 39 */ +uint32_t SHA_K2 = 0x8F1BBCDC; /* Kt for 40 <= t <= 59 */ +uint32_t SHA_K3 = 0xCA62C1D6; /* Kt for 60 <= t <= 79 */ + +/* + * srtp_sha1_core(M, H) computes the core compression function, where M is + * the next part of the message (in network byte order) and H is the + * intermediate state { H0, H1, ...} (in host byte order) + * + * this function does not do any of the padding required in the + * complete SHA1 function + * + * this function is used in the SEAL 3.0 key setup routines + * (crypto/cipher/seal.c) + */ + +void srtp_sha1_core(const uint32_t M[16], uint32_t hash_value[5]) +{ + uint32_t H0; + uint32_t H1; + uint32_t H2; + uint32_t H3; + uint32_t H4; + uint32_t W[80]; + uint32_t A, B, C, D, E, TEMP; + int t; + + /* copy hash_value into H0, H1, H2, H3, H4 */ + H0 = hash_value[0]; + H1 = hash_value[1]; + H2 = hash_value[2]; + H3 = hash_value[3]; + H4 = hash_value[4]; + + /* copy/xor message into array */ + + W[0] = be32_to_cpu(M[0]); + W[1] = be32_to_cpu(M[1]); + W[2] = be32_to_cpu(M[2]); + W[3] = be32_to_cpu(M[3]); + W[4] = be32_to_cpu(M[4]); + W[5] = be32_to_cpu(M[5]); + W[6] = be32_to_cpu(M[6]); + W[7] = be32_to_cpu(M[7]); + W[8] = be32_to_cpu(M[8]); + W[9] = be32_to_cpu(M[9]); + W[10] = be32_to_cpu(M[10]); + W[11] = be32_to_cpu(M[11]); + W[12] = be32_to_cpu(M[12]); + W[13] = be32_to_cpu(M[13]); + W[14] = be32_to_cpu(M[14]); + W[15] = be32_to_cpu(M[15]); + TEMP = W[13] ^ W[8] ^ W[2] ^ W[0]; + W[16] = S1(TEMP); + TEMP = W[14] ^ W[9] ^ W[3] ^ W[1]; + W[17] = S1(TEMP); + TEMP = W[15] ^ W[10] ^ W[4] ^ W[2]; + W[18] = S1(TEMP); + TEMP = W[16] ^ W[11] ^ W[5] ^ W[3]; + W[19] = S1(TEMP); + TEMP = W[17] ^ W[12] ^ W[6] ^ W[4]; + W[20] = S1(TEMP); + TEMP = W[18] ^ W[13] ^ W[7] ^ W[5]; + W[21] = S1(TEMP); + TEMP = W[19] ^ W[14] ^ W[8] ^ W[6]; + W[22] = S1(TEMP); + TEMP = W[20] ^ W[15] ^ W[9] ^ W[7]; + W[23] = S1(TEMP); + TEMP = W[21] ^ W[16] ^ W[10] ^ W[8]; + W[24] = S1(TEMP); + TEMP = W[22] ^ W[17] ^ W[11] ^ W[9]; + W[25] = S1(TEMP); + TEMP = W[23] ^ W[18] ^ W[12] ^ W[10]; + W[26] = S1(TEMP); + TEMP = W[24] ^ W[19] ^ W[13] ^ W[11]; + W[27] = S1(TEMP); + TEMP = W[25] ^ W[20] ^ W[14] ^ W[12]; + W[28] = S1(TEMP); + TEMP = W[26] ^ W[21] ^ W[15] ^ W[13]; + W[29] = S1(TEMP); + TEMP = W[27] ^ W[22] ^ W[16] ^ W[14]; + W[30] = S1(TEMP); + TEMP = W[28] ^ W[23] ^ W[17] ^ W[15]; + W[31] = S1(TEMP); + + /* process the remainder of the array */ + for (t = 32; t < 80; t++) { + TEMP = W[t - 3] ^ W[t - 8] ^ W[t - 14] ^ W[t - 16]; + W[t] = S1(TEMP); + } + + A = H0; + B = H1; + C = H2; + D = H3; + E = H4; + + for (t = 0; t < 20; t++) { + TEMP = S5(A) + f0(B, C, D) + E + W[t] + SHA_K0; + E = D; + D = C; + C = S30(B); + B = A; + A = TEMP; + } + for (; t < 40; t++) { + TEMP = S5(A) + f1(B, C, D) + E + W[t] + SHA_K1; + E = D; + D = C; + C = S30(B); + B = A; + A = TEMP; + } + for (; t < 60; t++) { + TEMP = S5(A) + f2(B, C, D) + E + W[t] + SHA_K2; + E = D; + D = C; + C = S30(B); + B = A; + A = TEMP; + } + for (; t < 80; t++) { + TEMP = S5(A) + f3(B, C, D) + E + W[t] + SHA_K3; + E = D; + D = C; + C = S30(B); + B = A; + A = TEMP; + } + + hash_value[0] = H0 + A; + hash_value[1] = H1 + B; + hash_value[2] = H2 + C; + hash_value[3] = H3 + D; + hash_value[4] = H4 + E; + + return; +} + +void srtp_sha1_init(srtp_sha1_ctx_t *ctx) +{ + /* initialize state vector */ + ctx->H[0] = 0x67452301; + ctx->H[1] = 0xefcdab89; + ctx->H[2] = 0x98badcfe; + ctx->H[3] = 0x10325476; + ctx->H[4] = 0xc3d2e1f0; + + /* indicate that message buffer is empty */ + ctx->octets_in_buffer = 0; + + /* reset message bit-count to zero */ + ctx->num_bits_in_msg = 0; +} + +void srtp_sha1_update(srtp_sha1_ctx_t *ctx, + const uint8_t *msg, + int octets_in_msg) +{ + int i; + uint8_t *buf = (uint8_t *)ctx->M; + + /* update message bit-count */ + ctx->num_bits_in_msg += octets_in_msg * 8; + + /* loop over 16-word blocks of M */ + while (octets_in_msg > 0) { + if (octets_in_msg + ctx->octets_in_buffer >= 64) { + /* + * copy words of M into msg buffer until that buffer is full, + * converting them into host byte order as needed + */ + octets_in_msg -= (64 - ctx->octets_in_buffer); + for (i = ctx->octets_in_buffer; i < 64; i++) { + buf[i] = *msg++; + } + ctx->octets_in_buffer = 0; + + /* process a whole block */ + + debug_print0(srtp_mod_sha1, "(update) running srtp_sha1_core()"); + + srtp_sha1_core(ctx->M, ctx->H); + + } else { + debug_print0(srtp_mod_sha1, + "(update) not running srtp_sha1_core()"); + + for (i = ctx->octets_in_buffer; + i < (ctx->octets_in_buffer + octets_in_msg); i++) { + buf[i] = *msg++; + } + ctx->octets_in_buffer += octets_in_msg; + octets_in_msg = 0; + } + } +} + +/* + * srtp_sha1_final(ctx, output) computes the result for ctx and copies it + * into the twenty octets located at *output + */ + +void srtp_sha1_final(srtp_sha1_ctx_t *ctx, uint32_t output[5]) +{ + uint32_t A, B, C, D, E, TEMP; + uint32_t W[80]; + int i, t; + + /* + * process the remaining octets_in_buffer, padding and terminating as + * necessary + */ + { + int tail = ctx->octets_in_buffer % 4; + + /* copy/xor message into array */ + for (i = 0; i < (ctx->octets_in_buffer + 3) / 4; i++) { + W[i] = be32_to_cpu(ctx->M[i]); + } + + /* set the high bit of the octet immediately following the message */ + switch (tail) { + case (3): + W[i - 1] = (be32_to_cpu(ctx->M[i - 1]) & 0xffffff00) | 0x80; + W[i] = 0x0; + break; + case (2): + W[i - 1] = (be32_to_cpu(ctx->M[i - 1]) & 0xffff0000) | 0x8000; + W[i] = 0x0; + break; + case (1): + W[i - 1] = (be32_to_cpu(ctx->M[i - 1]) & 0xff000000) | 0x800000; + W[i] = 0x0; + break; + case (0): + W[i] = 0x80000000; + break; + } + + /* zeroize remaining words */ + for (i++; i < 15; i++) { + W[i] = 0x0; + } + + /* + * if there is room at the end of the word array, then set the + * last word to the bit-length of the message; otherwise, set that + * word to zero and then we need to do one more run of the + * compression algo. + */ + if (ctx->octets_in_buffer < 56) { + W[15] = ctx->num_bits_in_msg; + } else if (ctx->octets_in_buffer < 60) { + W[15] = 0x0; + } + + /* process the word array */ + for (t = 16; t < 80; t++) { + TEMP = W[t - 3] ^ W[t - 8] ^ W[t - 14] ^ W[t - 16]; + W[t] = S1(TEMP); + } + + A = ctx->H[0]; + B = ctx->H[1]; + C = ctx->H[2]; + D = ctx->H[3]; + E = ctx->H[4]; + + for (t = 0; t < 20; t++) { + TEMP = S5(A) + f0(B, C, D) + E + W[t] + SHA_K0; + E = D; + D = C; + C = S30(B); + B = A; + A = TEMP; + } + for (; t < 40; t++) { + TEMP = S5(A) + f1(B, C, D) + E + W[t] + SHA_K1; + E = D; + D = C; + C = S30(B); + B = A; + A = TEMP; + } + for (; t < 60; t++) { + TEMP = S5(A) + f2(B, C, D) + E + W[t] + SHA_K2; + E = D; + D = C; + C = S30(B); + B = A; + A = TEMP; + } + for (; t < 80; t++) { + TEMP = S5(A) + f3(B, C, D) + E + W[t] + SHA_K3; + E = D; + D = C; + C = S30(B); + B = A; + A = TEMP; + } + + ctx->H[0] += A; + ctx->H[1] += B; + ctx->H[2] += C; + ctx->H[3] += D; + ctx->H[4] += E; + } + + debug_print0(srtp_mod_sha1, "(final) running srtp_sha1_core()"); + + if (ctx->octets_in_buffer >= 56) { + debug_print0(srtp_mod_sha1, "(final) running srtp_sha1_core() again"); + + /* we need to do one final run of the compression algo */ + + /* + * set initial part of word array to zeros, and set the + * final part to the number of bits in the message + */ + for (i = 0; i < 15; i++) { + W[i] = 0x0; + } + W[15] = ctx->num_bits_in_msg; + + /* process the word array */ + for (t = 16; t < 80; t++) { + TEMP = W[t - 3] ^ W[t - 8] ^ W[t - 14] ^ W[t - 16]; + W[t] = S1(TEMP); + } + + A = ctx->H[0]; + B = ctx->H[1]; + C = ctx->H[2]; + D = ctx->H[3]; + E = ctx->H[4]; + + for (t = 0; t < 20; t++) { + TEMP = S5(A) + f0(B, C, D) + E + W[t] + SHA_K0; + E = D; + D = C; + C = S30(B); + B = A; + A = TEMP; + } + for (; t < 40; t++) { + TEMP = S5(A) + f1(B, C, D) + E + W[t] + SHA_K1; + E = D; + D = C; + C = S30(B); + B = A; + A = TEMP; + } + for (; t < 60; t++) { + TEMP = S5(A) + f2(B, C, D) + E + W[t] + SHA_K2; + E = D; + D = C; + C = S30(B); + B = A; + A = TEMP; + } + for (; t < 80; t++) { + TEMP = S5(A) + f3(B, C, D) + E + W[t] + SHA_K3; + E = D; + D = C; + C = S30(B); + B = A; + A = TEMP; + } + + ctx->H[0] += A; + ctx->H[1] += B; + ctx->H[2] += C; + ctx->H[3] += D; + ctx->H[4] += E; + } + + /* copy result into output buffer */ + output[0] = be32_to_cpu(ctx->H[0]); + output[1] = be32_to_cpu(ctx->H[1]); + output[2] = be32_to_cpu(ctx->H[2]); + output[3] = be32_to_cpu(ctx->H[3]); + output[4] = be32_to_cpu(ctx->H[4]); + + /* indicate that message buffer in context is empty */ + ctx->octets_in_buffer = 0; + + return; +} diff --git a/third_party/libsrtp/src/crypto/include/aes.h b/third_party/libsrtp/src/crypto/include/aes.h new file mode 100644 index 0000000000..779c3ac744 --- /dev/null +++ b/third_party/libsrtp/src/crypto/include/aes.h @@ -0,0 +1,83 @@ +/* + * aes.h + * + * header file for the AES block cipher + * + * David A. McGrew + * Cisco Systems, Inc. + */ + +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef AES_H +#define AES_H + +#include "datatypes.h" +#include "err.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* aes internals */ + +typedef struct { + v128_t round[15]; + int num_rounds; +} srtp_aes_expanded_key_t; + +srtp_err_status_t srtp_aes_expand_encryption_key( + const uint8_t *key, + int key_len, + srtp_aes_expanded_key_t *expanded_key); + +srtp_err_status_t srtp_aes_expand_decryption_key( + const uint8_t *key, + int key_len, + srtp_aes_expanded_key_t *expanded_key); + +void srtp_aes_encrypt(v128_t *plaintext, + const srtp_aes_expanded_key_t *exp_key); + +void srtp_aes_decrypt(v128_t *plaintext, + const srtp_aes_expanded_key_t *exp_key); + +#ifdef __cplusplus +} +#endif + +#endif /* AES_H */ diff --git a/third_party/libsrtp/src/crypto/include/aes_gcm.h b/third_party/libsrtp/src/crypto/include/aes_gcm.h new file mode 100644 index 0000000000..cd0dceed3e --- /dev/null +++ b/third_party/libsrtp/src/crypto/include/aes_gcm.h @@ -0,0 +1,110 @@ +/* + * aes_gcm.h + * + * Header for AES Galois Counter Mode. + * + * John A. Foley + * Cisco Systems, Inc. + * + */ +/* + * + * Copyright (c) 2013-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef AES_GCM_H +#define AES_GCM_H + +#include "cipher.h" +#include "srtp.h" +#include "datatypes.h" + +#ifdef OPENSSL + +#include <openssl/evp.h> +#include <openssl/aes.h> + +typedef struct { + int key_size; + int tag_len; + EVP_CIPHER_CTX *ctx; + srtp_cipher_direction_t dir; +} srtp_aes_gcm_ctx_t; + +#endif /* OPENSSL */ + +#ifdef MBEDTLS +#define MAX_AD_SIZE 2048 +#include <mbedtls/aes.h> +#include <mbedtls/gcm.h> + +typedef struct { + int key_size; + int tag_len; + int aad_size; + int iv_len; + uint8_t iv[12]; + uint8_t tag[16]; + uint8_t aad[MAX_AD_SIZE]; + mbedtls_gcm_context *ctx; + srtp_cipher_direction_t dir; +} srtp_aes_gcm_ctx_t; + +#endif /* MBEDTLS */ + +#ifdef NSS + +#define NSS_PKCS11_2_0_COMPAT 1 + +#include <nss.h> +#include <pk11pub.h> + +#define MAX_AD_SIZE 2048 + +typedef struct { + int key_size; + int tag_size; + srtp_cipher_direction_t dir; + NSSInitContext *nss; + PK11SymKey *key; + uint8_t iv[12]; + uint8_t aad[MAX_AD_SIZE]; + int aad_size; + CK_GCM_PARAMS params; + uint8_t tag[16]; +} srtp_aes_gcm_ctx_t; + +#endif /* NSS */ + +#endif /* AES_GCM_H */ diff --git a/third_party/libsrtp/src/crypto/include/aes_icm.h b/third_party/libsrtp/src/crypto/include/aes_icm.h new file mode 100644 index 0000000000..8ded156a29 --- /dev/null +++ b/third_party/libsrtp/src/crypto/include/aes_icm.h @@ -0,0 +1,62 @@ +/* + * aes_icm.h + * + * Header for AES Integer Counter Mode. + * + * David A. McGrew + * Cisco Systems, Inc. + * + */ + +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef AES_ICM_H +#define AES_ICM_H + +#include "aes.h" +#include "cipher.h" + +typedef struct { + v128_t counter; /* holds the counter value */ + v128_t offset; /* initial offset value */ + v128_t keystream_buffer; /* buffers bytes of keystream */ + srtp_aes_expanded_key_t expanded_key; /* the cipher key */ + int bytes_in_buffer; /* number of unused bytes in buffer */ + int key_size; /* AES key size + 14 byte SALT */ +} srtp_aes_icm_ctx_t; + +#endif /* AES_ICM_H */ diff --git a/third_party/libsrtp/src/crypto/include/aes_icm_ext.h b/third_party/libsrtp/src/crypto/include/aes_icm_ext.h new file mode 100644 index 0000000000..5b21c95dde --- /dev/null +++ b/third_party/libsrtp/src/crypto/include/aes_icm_ext.h @@ -0,0 +1,99 @@ +/* + * aes_icm.h + * + * Header for AES Integer Counter Mode. + * + * David A. McGrew + * Cisco Systems, Inc. + * + */ +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef AES_ICM_H +#define AES_ICM_H + +#include "cipher.h" +#include "datatypes.h" + +#ifdef OPENSSL + +#include <openssl/evp.h> +#include <openssl/aes.h> + +typedef struct { + v128_t counter; /* holds the counter value */ + v128_t offset; /* initial offset value */ + int key_size; + EVP_CIPHER_CTX *ctx; +} srtp_aes_icm_ctx_t; + +#endif /* OPENSSL */ + +#ifdef MBEDTLS + +#include <mbedtls/aes.h> +typedef struct { + v128_t counter; /* holds the counter value */ + v128_t offset; /* initial offset value */ + v128_t stream_block; + size_t nc_off; + int key_size; + mbedtls_aes_context *ctx; +} srtp_aes_icm_ctx_t; + +#endif /* MBEDTLS */ + +#ifdef NSS + +#define NSS_PKCS11_2_0_COMPAT 1 + +#include <nss.h> +#include <pk11pub.h> + +typedef struct { + v128_t counter; + v128_t offset; + int key_size; + uint8_t iv[16]; + NSSInitContext *nss; + PK11SymKey *key; + PK11Context *ctx; +} srtp_aes_icm_ctx_t; + +#endif /* NSS */ + +#endif /* AES_ICM_H */ diff --git a/third_party/libsrtp/src/crypto/include/alloc.h b/third_party/libsrtp/src/crypto/include/alloc.h new file mode 100644 index 0000000000..1fc041014d --- /dev/null +++ b/third_party/libsrtp/src/crypto/include/alloc.h @@ -0,0 +1,76 @@ +/* + * alloc.h + * + * interface to memory allocation and deallocation, with optional debugging + * + * David A. McGrew + * Cisco Systems, Inc. + */ +/* + * + * Copyright (c) 2001-2017 Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef CRYPTO_ALLOC_H +#define CRYPTO_ALLOC_H + +#include "datatypes.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * srtp_crypto_alloc + * + * Allocates a block of memory of given size. The memory will be + * initialized to zero's. Free the memory with a call to srtp_crypto_free. + * + * returns pointer to memory on success or else NULL + */ +void *srtp_crypto_alloc(size_t size); + +/* + * srtp_crypto_free + * + * Frees the block of memory ptr previously allocated with + * srtp_crypto_alloc + */ +void srtp_crypto_free(void *ptr); + +#ifdef __cplusplus +} +#endif + +#endif /* CRYPTO_ALLOC_H */ diff --git a/third_party/libsrtp/src/crypto/include/auth.h b/third_party/libsrtp/src/crypto/include/auth.h new file mode 100644 index 0000000000..774ea1687b --- /dev/null +++ b/third_party/libsrtp/src/crypto/include/auth.h @@ -0,0 +1,173 @@ +/* + * auth.h + * + * common interface to authentication functions + * + * David A. McGrew + * Cisco Systems, Inc. + */ + +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef SRTP_AUTH_H +#define SRTP_AUTH_H + +#include "srtp.h" +#include "crypto_types.h" /* for values of auth_type_id_t */ + +#ifdef __cplusplus +extern "C" { +#endif + +typedef const struct srtp_auth_type_t *srtp_auth_type_pointer; +typedef struct srtp_auth_t *srtp_auth_pointer_t; + +typedef srtp_err_status_t (*srtp_auth_alloc_func)(srtp_auth_pointer_t *ap, + int key_len, + int out_len); + +typedef srtp_err_status_t (*srtp_auth_init_func)(void *state, + const uint8_t *key, + int key_len); + +typedef srtp_err_status_t (*srtp_auth_dealloc_func)(srtp_auth_pointer_t ap); + +typedef srtp_err_status_t (*srtp_auth_compute_func)(void *state, + const uint8_t *buffer, + int octets_to_auth, + int tag_len, + uint8_t *tag); + +typedef srtp_err_status_t (*srtp_auth_update_func)(void *state, + const uint8_t *buffer, + int octets_to_auth); + +typedef srtp_err_status_t (*srtp_auth_start_func)(void *state); + +/* some syntactic sugar on these function types */ +#define srtp_auth_type_alloc(at, a, klen, outlen) \ + ((at)->alloc((a), (klen), (outlen))) + +#define srtp_auth_init(a, key) \ + (((a)->type)->init((a)->state, (key), ((a)->key_len))) + +#define srtp_auth_compute(a, buf, len, res) \ + (((a)->type)->compute((a)->state, (buf), (len), (a)->out_len, (res))) + +#define srtp_auth_update(a, buf, len) \ + (((a)->type)->update((a)->state, (buf), (len))) + +#define srtp_auth_start(a) (((a)->type)->start((a)->state)) + +#define srtp_auth_dealloc(c) (((c)->type)->dealloc(c)) + +/* functions to get information about a particular auth_t */ +int srtp_auth_get_key_length(const struct srtp_auth_t *a); + +int srtp_auth_get_tag_length(const struct srtp_auth_t *a); + +int srtp_auth_get_prefix_length(const struct srtp_auth_t *a); + +/* + * srtp_auth_test_case_t is a (list of) key/message/tag values that are + * known to be correct for a particular cipher. this data can be used + * to test an implementation in an on-the-fly self test of the + * correctness of the implementation. (see the srtp_auth_type_self_test() + * function below) + */ +typedef struct srtp_auth_test_case_t { + int key_length_octets; /* octets in key */ + const uint8_t *key; /* key */ + int data_length_octets; /* octets in data */ + const uint8_t *data; /* data */ + int tag_length_octets; /* octets in tag */ + const uint8_t *tag; /* tag */ + const struct srtp_auth_test_case_t + *next_test_case; /* pointer to next testcase */ +} srtp_auth_test_case_t; + +/* srtp_auth_type_t */ +typedef struct srtp_auth_type_t { + srtp_auth_alloc_func alloc; + srtp_auth_dealloc_func dealloc; + srtp_auth_init_func init; + srtp_auth_compute_func compute; + srtp_auth_update_func update; + srtp_auth_start_func start; + const char *description; + const srtp_auth_test_case_t *test_data; + srtp_auth_type_id_t id; +} srtp_auth_type_t; + +typedef struct srtp_auth_t { + const srtp_auth_type_t *type; + void *state; + int out_len; /* length of output tag in octets */ + int key_len; /* length of key in octets */ + int prefix_len; /* length of keystream prefix */ +} srtp_auth_t; + +/* + * srtp_auth_type_self_test() tests an auth_type against test cases + * provided in an array of values of key/message/tag that is known to + * be good + */ +srtp_err_status_t srtp_auth_type_self_test(const srtp_auth_type_t *at); + +/* + * srtp_auth_type_test() tests an auth_type against external test cases + * provided in an array of values of key/message/tag that is known to + * be good + */ +srtp_err_status_t srtp_auth_type_test(const srtp_auth_type_t *at, + const srtp_auth_test_case_t *test_data); + +/* + * srtp_replace_auth_type(ct, id) + * + * replaces srtp's kernel's auth type implementation for the auth_type id + * with a new one passed in externally. The new auth type must pass all the + * existing auth_type's self tests as well as its own. + */ +srtp_err_status_t srtp_replace_auth_type(const srtp_auth_type_t *ct, + srtp_auth_type_id_t id); + +#ifdef __cplusplus +} +#endif + +#endif /* SRTP_AUTH_H */ diff --git a/third_party/libsrtp/src/crypto/include/cipher.h b/third_party/libsrtp/src/crypto/include/cipher.h new file mode 100644 index 0000000000..4f14e3560f --- /dev/null +++ b/third_party/libsrtp/src/crypto/include/cipher.h @@ -0,0 +1,248 @@ +/* + * cipher.h + * + * common interface to ciphers + * + * David A. McGrew + * Cisco Systems, Inc. + */ +/* + * + * Copyright (c) 2001-2017 Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef SRTP_CIPHER_H +#define SRTP_CIPHER_H + +#include "srtp.h" +#include "crypto_types.h" /* for values of cipher_type_id_t */ + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * srtp_cipher_direction_t defines a particular cipher operation. + * + * A srtp_cipher_direction_t is an enum that describes a particular cipher + * operation, i.e. encryption or decryption. For some ciphers, this + * distinction does not matter, but for others, it is essential. + */ +typedef enum { + srtp_direction_encrypt, /**< encryption (convert plaintext to ciphertext) */ + srtp_direction_decrypt, /**< decryption (convert ciphertext to plaintext) */ + srtp_direction_any /**< encryption or decryption */ +} srtp_cipher_direction_t; + +/* + * the srtp_cipher_pointer_t definition is needed + * as srtp_cipher_t is not yet defined + */ +typedef struct srtp_cipher_t *srtp_cipher_pointer_t; + +/* + * a srtp_cipher_alloc_func_t allocates (but does not initialize) a + * srtp_cipher_t + */ +typedef srtp_err_status_t (*srtp_cipher_alloc_func_t)(srtp_cipher_pointer_t *cp, + int key_len, + int tag_len); + +/* + * a srtp_cipher_init_func_t [re-]initializes a cipher_t with a given key + */ +typedef srtp_err_status_t (*srtp_cipher_init_func_t)(void *state, + const uint8_t *key); + +/* a srtp_cipher_dealloc_func_t de-allocates a cipher_t */ +typedef srtp_err_status_t (*srtp_cipher_dealloc_func_t)( + srtp_cipher_pointer_t cp); + +/* + * a srtp_cipher_set_aad_func_t processes the AAD data for AEAD ciphers + */ +typedef srtp_err_status_t (*srtp_cipher_set_aad_func_t)(void *state, + const uint8_t *aad, + uint32_t aad_len); + +/* a srtp_cipher_encrypt_func_t encrypts data in-place */ +typedef srtp_err_status_t (*srtp_cipher_encrypt_func_t)( + void *state, + uint8_t *buffer, + unsigned int *octets_to_encrypt); + +/* a srtp_cipher_decrypt_func_t decrypts data in-place */ +typedef srtp_err_status_t (*srtp_cipher_decrypt_func_t)( + void *state, + uint8_t *buffer, + unsigned int *octets_to_decrypt); + +/* + * a srtp_cipher_set_iv_func_t function sets the current initialization vector + */ +typedef srtp_err_status_t (*srtp_cipher_set_iv_func_t)( + void *state, + uint8_t *iv, + srtp_cipher_direction_t direction); + +/* + * a cipher_get_tag_func_t function is used to get the authentication + * tag that was calculated by an AEAD cipher. + */ +typedef srtp_err_status_t (*srtp_cipher_get_tag_func_t)(void *state, + uint8_t *tag, + uint32_t *len); + +/* + * srtp_cipher_test_case_t is a (list of) key, salt, plaintext, ciphertext, + * and aad values that are known to be correct for a + * particular cipher. this data can be used to test an implementation + * in an on-the-fly self test of the correctness of the implementation. + * (see the srtp_cipher_type_self_test() function below) + */ +typedef struct srtp_cipher_test_case_t { + int key_length_octets; /* octets in key */ + const uint8_t *key; /* key */ + uint8_t *idx; /* packet index */ + unsigned int plaintext_length_octets; /* octets in plaintext */ + const uint8_t *plaintext; /* plaintext */ + unsigned int ciphertext_length_octets; /* octets in plaintext */ + const uint8_t *ciphertext; /* ciphertext */ + int aad_length_octets; /* octets in AAD */ + const uint8_t *aad; /* AAD */ + int tag_length_octets; /* Length of AEAD tag */ + const struct srtp_cipher_test_case_t + *next_test_case; /* pointer to next testcase */ +} srtp_cipher_test_case_t; + +/* srtp_cipher_type_t defines the 'metadata' for a particular cipher type */ +typedef struct srtp_cipher_type_t { + srtp_cipher_alloc_func_t alloc; + srtp_cipher_dealloc_func_t dealloc; + srtp_cipher_init_func_t init; + srtp_cipher_set_aad_func_t set_aad; + srtp_cipher_encrypt_func_t encrypt; + srtp_cipher_encrypt_func_t decrypt; + srtp_cipher_set_iv_func_t set_iv; + srtp_cipher_get_tag_func_t get_tag; + const char *description; + const srtp_cipher_test_case_t *test_data; + srtp_cipher_type_id_t id; +} srtp_cipher_type_t; + +/* + * srtp_cipher_t defines an instantiation of a particular cipher, with fixed + * key length, key and salt values + */ +typedef struct srtp_cipher_t { + const srtp_cipher_type_t *type; + void *state; + int key_len; + int algorithm; +} srtp_cipher_t; + +/* some bookkeeping functions */ +int srtp_cipher_get_key_length(const srtp_cipher_t *c); + +/* + * srtp_cipher_type_self_test() tests a cipher against test cases provided in + * an array of values of key/srtp_xtd_seq_num_t/plaintext/ciphertext + * that is known to be good + */ +srtp_err_status_t srtp_cipher_type_self_test(const srtp_cipher_type_t *ct); + +/* + * srtp_cipher_type_test() tests a cipher against external test cases provided + * in + * an array of values of key/srtp_xtd_seq_num_t/plaintext/ciphertext + * that is known to be good + */ +srtp_err_status_t srtp_cipher_type_test( + const srtp_cipher_type_t *ct, + const srtp_cipher_test_case_t *test_data); + +/* + * srtp_cipher_bits_per_second(c, l, t) computes (an estimate of) the + * number of bits that a cipher implementation can encrypt in a second + * + * c is a cipher (which MUST be allocated and initialized already), l + * is the length in octets of the test data to be encrypted, and t is + * the number of trials + * + * if an error is encountered, then the value 0 is returned + */ +uint64_t srtp_cipher_bits_per_second(srtp_cipher_t *c, + int octets_in_buffer, + int num_trials); + +srtp_err_status_t srtp_cipher_type_alloc(const srtp_cipher_type_t *ct, + srtp_cipher_t **c, + int key_len, + int tlen); +srtp_err_status_t srtp_cipher_dealloc(srtp_cipher_t *c); +srtp_err_status_t srtp_cipher_init(srtp_cipher_t *c, const uint8_t *key); +srtp_err_status_t srtp_cipher_set_iv(srtp_cipher_t *c, + uint8_t *iv, + int direction); +srtp_err_status_t srtp_cipher_output(srtp_cipher_t *c, + uint8_t *buffer, + uint32_t *num_octets_to_output); +srtp_err_status_t srtp_cipher_encrypt(srtp_cipher_t *c, + uint8_t *buffer, + uint32_t *num_octets_to_output); +srtp_err_status_t srtp_cipher_decrypt(srtp_cipher_t *c, + uint8_t *buffer, + uint32_t *num_octets_to_output); +srtp_err_status_t srtp_cipher_get_tag(srtp_cipher_t *c, + uint8_t *buffer, + uint32_t *tag_len); +srtp_err_status_t srtp_cipher_set_aad(srtp_cipher_t *c, + const uint8_t *aad, + uint32_t aad_len); + +/* + * srtp_replace_cipher_type(ct, id) + * + * replaces srtp's existing cipher implementation for the cipher_type id + * with a new one passed in externally. The new cipher must pass all the + * existing cipher_type's self tests as well as its own. + */ +srtp_err_status_t srtp_replace_cipher_type(const srtp_cipher_type_t *ct, + srtp_cipher_type_id_t id); + +#ifdef __cplusplus +} +#endif + +#endif /* SRTP_CIPHER_H */ diff --git a/third_party/libsrtp/src/crypto/include/cipher_priv.h b/third_party/libsrtp/src/crypto/include/cipher_priv.h new file mode 100644 index 0000000000..46848ea7c6 --- /dev/null +++ b/third_party/libsrtp/src/crypto/include/cipher_priv.h @@ -0,0 +1,62 @@ +/* + * + * Copyright(c) 2001-2017 Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef SRTP_CIHPER_PRIV_H +#define SRTP_CIHPER_PRIV_H + +#include "cipher.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * A trivial platform independent random source. + * For use in test only. + */ +void srtp_cipher_rand_for_tests(void *dest, uint32_t len); + +/* + * A trivial platform independent 32 bit random number. + * For use in test only. + */ +uint32_t srtp_cipher_rand_u32_for_tests(void); + +#ifdef __cplusplus +} +#endif + +#endif /* SRTP_CIPHER_PRIV_H */ diff --git a/third_party/libsrtp/src/crypto/include/cipher_types.h b/third_party/libsrtp/src/crypto/include/cipher_types.h new file mode 100644 index 0000000000..28250d1624 --- /dev/null +++ b/third_party/libsrtp/src/crypto/include/cipher_types.h @@ -0,0 +1,80 @@ +/* + * + * Copyright(c) 2001-2017 Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef CIHPER_TYPES_H +#define CIHPER_TYPES_H + +#include "cipher.h" +#include "auth.h" + +/* + * cipher types that can be included in the kernel + */ + +extern const srtp_cipher_type_t srtp_null_cipher; +extern const srtp_cipher_type_t srtp_aes_icm_128; +extern const srtp_cipher_type_t srtp_aes_icm_256; +#ifdef GCM +extern const srtp_cipher_type_t srtp_aes_icm_192; +extern const srtp_cipher_type_t srtp_aes_gcm_128; +extern const srtp_cipher_type_t srtp_aes_gcm_256; +#endif + +/* + * auth func types that can be included in the kernel + */ + +extern const srtp_auth_type_t srtp_null_auth; +extern const srtp_auth_type_t srtp_hmac; + +/* + * other generic debug modules that can be included in the kernel + */ + +extern srtp_debug_module_t srtp_mod_auth; +extern srtp_debug_module_t srtp_mod_cipher; +extern srtp_debug_module_t srtp_mod_alloc; + +/* debug modules for cipher types */ +extern srtp_debug_module_t srtp_mod_aes_icm; + +#if defined(OPENSSL) || defined(MBEDTLS) || defined(NSS) +extern srtp_debug_module_t srtp_mod_aes_gcm; +#endif + +/* debug modules for auth types */ +extern srtp_debug_module_t srtp_mod_hmac; +#endif diff --git a/third_party/libsrtp/src/crypto/include/crypto_kernel.h b/third_party/libsrtp/src/crypto/include/crypto_kernel.h new file mode 100644 index 0000000000..1f8dfa7712 --- /dev/null +++ b/third_party/libsrtp/src/crypto/include/crypto_kernel.h @@ -0,0 +1,215 @@ +/* + * crypto_kernel.h + * + * header for the cryptographic kernel + * + * David A. McGrew + * Cisco Systems, Inc. + */ +/* + * + * Copyright(c) 2001-2017 Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef CRYPTO_KERNEL +#define CRYPTO_KERNEL + +#include "cipher.h" +#include "auth.h" +#include "err.h" +#include "crypto_types.h" +#include "key.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * crypto_kernel_state_t defines the possible states: + * + * insecure - not yet initialized + * secure - initialized and passed self-tests + */ +typedef enum { + srtp_crypto_kernel_state_insecure, + srtp_crypto_kernel_state_secure +} srtp_crypto_kernel_state_t; + +/* + * linked list of cipher types + */ +typedef struct srtp_kernel_cipher_type { + srtp_cipher_type_id_t id; + const srtp_cipher_type_t *cipher_type; + struct srtp_kernel_cipher_type *next; +} srtp_kernel_cipher_type_t; + +/* + * linked list of auth types + */ +typedef struct srtp_kernel_auth_type { + srtp_auth_type_id_t id; + const srtp_auth_type_t *auth_type; + struct srtp_kernel_auth_type *next; +} srtp_kernel_auth_type_t; + +/* + * linked list of debug modules + */ +typedef struct srtp_kernel_debug_module { + srtp_debug_module_t *mod; + struct srtp_kernel_debug_module *next; +} srtp_kernel_debug_module_t; + +/* + * crypto_kernel_t is the data structure for the crypto kernel + * + * note that there is *exactly one* instance of this data type, + * a global variable defined in crypto_kernel.c + */ +typedef struct { + srtp_crypto_kernel_state_t state; /* current state of kernel */ + srtp_kernel_cipher_type_t *cipher_type_list; /* list of all cipher types */ + srtp_kernel_auth_type_t *auth_type_list; /* list of all auth func types */ + srtp_kernel_debug_module_t + *debug_module_list; /* list of all debug modules */ +} srtp_crypto_kernel_t; + +/* + * srtp_crypto_kernel_t external api + */ + +/* + * The function srtp_crypto_kernel_init() initialized the crypto kernel and + * runs the self-test operations on the random number generators and + * crypto algorithms. Possible return values are: + * + * srtp_err_status_ok initialization successful + * <other> init failure + * + * If any value other than srtp_err_status_ok is returned, the + * crypto_kernel MUST NOT be used. + */ +srtp_err_status_t srtp_crypto_kernel_init(void); + +/* + * The function srtp_crypto_kernel_shutdown() de-initializes the + * crypto_kernel, zeroizes keys and other cryptographic material, and + * deallocates any dynamically allocated memory. Possible return + * values are: + * + * srtp_err_status_ok shutdown successful + * <other> shutdown failure + * + */ +srtp_err_status_t srtp_crypto_kernel_shutdown(void); + +/* + * The function srtp_crypto_kernel_stats() checks the the crypto_kernel, + * running tests on the ciphers, auth funcs, and rng, and prints out a + * status report. Possible return values are: + * + * srtp_err_status_ok all tests were passed + * <other> a test failed + * + */ +srtp_err_status_t srtp_crypto_kernel_status(void); + +/* + * srtp_crypto_kernel_list_debug_modules() outputs a list of debugging modules + * + */ +srtp_err_status_t srtp_crypto_kernel_list_debug_modules(void); + +/* + * srtp_crypto_kernel_load_cipher_type() + * + */ +srtp_err_status_t srtp_crypto_kernel_load_cipher_type( + const srtp_cipher_type_t *ct, + srtp_cipher_type_id_t id); + +srtp_err_status_t srtp_crypto_kernel_load_auth_type(const srtp_auth_type_t *ct, + srtp_auth_type_id_t id); + +srtp_err_status_t srtp_crypto_kernel_load_debug_module( + srtp_debug_module_t *new_dm); + +/* + * srtp_crypto_kernel_alloc_cipher(id, cp, key_len); + * + * allocates a cipher of type id at location *cp, with key length + * key_len octets. Return values are: + * + * srtp_err_status_ok no problems + * srtp_err_status_alloc_fail an allocation failure occured + * srtp_err_status_fail couldn't find cipher with identifier 'id' + */ +srtp_err_status_t srtp_crypto_kernel_alloc_cipher(srtp_cipher_type_id_t id, + srtp_cipher_pointer_t *cp, + int key_len, + int tag_len); + +/* + * srtp_crypto_kernel_alloc_auth(id, ap, key_len, tag_len); + * + * allocates an auth function of type id at location *ap, with key + * length key_len octets and output tag length of tag_len. Return + * values are: + * + * srtp_err_status_ok no problems + * srtp_err_status_alloc_fail an allocation failure occured + * srtp_err_status_fail couldn't find auth with identifier 'id' + */ +srtp_err_status_t srtp_crypto_kernel_alloc_auth(srtp_auth_type_id_t id, + srtp_auth_pointer_t *ap, + int key_len, + int tag_len); + +/* + * srtp_crypto_kernel_set_debug_module(mod_name, v) + * + * sets dynamic debugging to the value v (0 for off, 1 for on) for the + * debug module with the name mod_name + * + * returns srtp_err_status_ok on success, srtp_err_status_fail otherwise + */ +srtp_err_status_t srtp_crypto_kernel_set_debug_module(const char *mod_name, + int v); + +#ifdef __cplusplus +} +#endif + +#endif /* CRYPTO_KERNEL */ diff --git a/third_party/libsrtp/src/crypto/include/crypto_types.h b/third_party/libsrtp/src/crypto/include/crypto_types.h new file mode 100644 index 0000000000..7fd3178b0b --- /dev/null +++ b/third_party/libsrtp/src/crypto/include/crypto_types.h @@ -0,0 +1,116 @@ +/* + * crypto_types.h + * + * constants for cipher types and auth func types + * + * David A. McGrew + * Cisco Systems, Inc. + */ +/* + * + * Copyright(c) 2001-2017 Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef SRTP_CRYPTO_TYPES_H +#define SRTP_CRYPTO_TYPES_H + +/* + * The null cipher performs no encryption. + * + * The SRTP_NULL_CIPHER leaves its inputs unaltered, during both the + * encryption and decryption operations. This cipher can be chosen + * to indicate that no encryption is to be performed. + */ +#define SRTP_NULL_CIPHER 0 + +/* + * AES-128 Integer Counter Mode (AES ICM) + * + * AES-128 ICM is the variant of counter mode that is used by + * Secure RTP. This cipher uses a 16-octet key concatenated with a + * 14-octet offset (or salt) value. + */ +#define SRTP_AES_ICM_128 1 + +/* + * AES-192 Integer Counter Mode (AES ICM) + * + * AES-128 ICM is the variant of counter mode that is used by + * Secure RTP. This cipher uses a 24-octet key concatenated with a + * 14-octet offset (or salt) value. + */ +#define SRTP_AES_ICM_192 4 + +/* + * AES-256 Integer Counter Mode (AES ICM) + * + * AES-128 ICM is the variant of counter mode that is used by + * Secure RTP. This cipher uses a 32-octet key concatenated with a + * 14-octet offset (or salt) value. + */ +#define SRTP_AES_ICM_256 5 + +/* + * AES-128_GCM Galois Counter Mode (AES GCM) + * + * AES-128 GCM is the variant of galois counter mode that is used by + * Secure RTP. This cipher uses a 16-octet key. + */ +#define SRTP_AES_GCM_128 6 + +/* + * AES-256_GCM Galois Counter Mode (AES GCM) + * + * AES-256 GCM is the variant of galois counter mode that is used by + * Secure RTP. This cipher uses a 32-octet key. + */ +#define SRTP_AES_GCM_256 7 + +/* + * The null authentication function performs no authentication. + * + * The NULL_AUTH function does nothing, and can be selected to indicate + * that authentication should not be performed. + */ +#define SRTP_NULL_AUTH 0 + +/* + * HMAC-SHA1 + * + * SRTP_HMAC_SHA1 implements the Hash-based MAC using the NIST Secure + * Hash Algorithm version 1 (SHA1). + */ +#define SRTP_HMAC_SHA1 3 + +#endif /* SRTP_CRYPTO_TYPES_H */ diff --git a/third_party/libsrtp/src/crypto/include/datatypes.h b/third_party/libsrtp/src/crypto/include/datatypes.h new file mode 100644 index 0000000000..5164cf0021 --- /dev/null +++ b/third_party/libsrtp/src/crypto/include/datatypes.h @@ -0,0 +1,244 @@ +/* + * datatypes.h + * + * data types for bit vectors and finite fields + * + * David A. McGrew + * Cisco Systems, Inc. + */ + +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef DATATYPES_H +#define DATATYPES_H + +#include "integers.h" /* definitions of uint32_t, et cetera */ +#include "alloc.h" + +#include <stdarg.h> + +#include <stdio.h> +#include <string.h> +#include <time.h> +#ifdef HAVE_NETINET_IN_H +#include <netinet/in.h> +#elif defined HAVE_WINSOCK2_H +#include <winsock2.h> +#else +#error "Platform not recognized" +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +typedef union { + uint8_t v8[16]; + uint16_t v16[8]; + uint32_t v32[4]; + uint64_t v64[2]; +} v128_t; + +#define MAX_PRINT_STRING_LEN 1024 + +char *srtp_octet_string_hex_string(const void *str, int length); + +char *v128_bit_string(v128_t *x); + +char *v128_hex_string(v128_t *x); + +void v128_copy_octet_string(v128_t *x, const uint8_t s[16]); + +void v128_left_shift(v128_t *x, int shift_index); + +/* + * the following macros define the data manipulation functions + * + */ + +#define v128_set_to_zero(x) \ + ((x)->v32[0] = 0, (x)->v32[1] = 0, (x)->v32[2] = 0, (x)->v32[3] = 0) + +#define v128_copy(x, y) \ + ((x)->v32[0] = (y)->v32[0], (x)->v32[1] = (y)->v32[1], \ + (x)->v32[2] = (y)->v32[2], (x)->v32[3] = (y)->v32[3]) + +#define v128_xor(z, x, y) \ + ((z)->v32[0] = (x)->v32[0] ^ (y)->v32[0], \ + (z)->v32[1] = (x)->v32[1] ^ (y)->v32[1], \ + (z)->v32[2] = (x)->v32[2] ^ (y)->v32[2], \ + (z)->v32[3] = (x)->v32[3] ^ (y)->v32[3]) + +/* ok for NO_64BIT_MATH if it can compare uint64_t's (even as structures) */ +#ifdef NO_64BIT_MATH +#define v128_xor_eq(z, x) \ + ((z)->v32[0] ^= (x)->v32[0], (z)->v32[1] ^= (x)->v32[1], \ + (z)->v32[2] ^= (x)->v32[2], (z)->v32[3] ^= (x)->v32[3]) +#else +#define v128_xor_eq(z, x) \ + ((z)->v64[0] ^= (x)->v64[0], (z)->v64[1] ^= (x)->v64[1]) +#endif + +/* NOTE! This assumes an odd ordering! */ +/* This will not be compatible directly with math on some processors */ +/* bit 0 is first 32-bit word, low order bit. in little-endian, that's + the first byte of the first 32-bit word. In big-endian, that's + the 3rd byte of the first 32-bit word */ +/* The get/set bit code is used by the replay code ONLY, and it doesn't + really care which bit is which. AES does care which bit is which, but + doesn't use the 128-bit get/set or 128-bit shifts */ + +#define v128_get_bit(x, bit) (((((x)->v32[(bit) >> 5]) >> ((bit)&31)) & 1)) + +#define v128_set_bit(x, bit) \ + ((((x)->v32[(bit) >> 5]) |= ((uint32_t)1 << ((bit)&31)))) + +#define v128_clear_bit(x, bit) \ + ((((x)->v32[(bit) >> 5]) &= ~((uint32_t)1 << ((bit)&31)))) + +/* + * srtp_octet_string_is_eq(a, b, len) returns 1 if the length len strings + * a and b are not equal. It returns 0 otherwise. The running time of the + * comparison depends only on len, making this safe to use for (e.g.) + * verifying authentication tags. + */ + +int srtp_octet_string_is_eq(uint8_t *a, uint8_t *b, int len); + +/* + * A portable way to zero out memory as recommended by + * https://cryptocoding.net/index.php/Coding_rules#Clean_memory_of_secret_data + * This is used to zero memory when OPENSSL_cleanse() is not available. + */ +void srtp_cleanse(void *s, size_t len); + +/* + * Functions as a wrapper that delegates to either srtp_cleanse() or + * OPENSSL_cleanse() if available to zero memory. + */ +void octet_string_set_to_zero(void *s, size_t len); + +#if defined(HAVE_CONFIG_H) + +/* + * Convert big endian integers to CPU byte order. + */ +#ifdef WORDS_BIGENDIAN +/* Nothing to do. */ +#define be32_to_cpu(x) (x) +#define be64_to_cpu(x) (x) +#elif defined(HAVE_BYTESWAP_H) +/* We have (hopefully) optimized versions in byteswap.h */ +#include <byteswap.h> +#define be32_to_cpu(x) bswap_32((x)) +#define be64_to_cpu(x) bswap_64((x)) +#else /* WORDS_BIGENDIAN */ + +#if defined(__GNUC__) && (defined(HAVE_X86) || defined(__x86_64__)) +/* Fall back. */ +static inline uint32_t be32_to_cpu(uint32_t v) +{ + /* optimized for x86. */ + asm("bswap %0" : "=r"(v) : "0"(v)); + return v; +} +#else /* HAVE_X86 */ +#ifdef HAVE_NETINET_IN_H +#include <netinet/in.h> +#elif defined HAVE_WINSOCK2_H +#include <winsock2.h> +#endif /* HAVE_NETINET_IN_H */ +#define be32_to_cpu(x) ntohl((x)) +#endif /* HAVE_X86 */ + +static inline uint64_t be64_to_cpu(uint64_t v) +{ +#ifdef NO_64BIT_MATH + /* use the make64 functions to do 64-bit math */ + v = make64(htonl(low32(v)), htonl(high32(v))); +#else /* NO_64BIT_MATH */ + /* use the native 64-bit math */ + v = (uint64_t)((be32_to_cpu((uint32_t)(v >> 32))) | + (((uint64_t)be32_to_cpu((uint32_t)v)) << 32)); +#endif /* NO_64BIT_MATH */ + return v; +} + +#endif /* WORDS_BIGENDIAN */ + +#endif /* HAVE_CONFIG_H */ + +/* + * functions manipulating bitvector_t + * + * A bitvector_t consists of an array of words and an integer + * representing the number of significant bits stored in the array. + * The bits are packed as follows: the least significant bit is that + * of word[0], while the most significant bit is the nth most + * significant bit of word[m], where length = bits_per_word * m + n. + * + */ + +#define bits_per_word 32 +#define bytes_per_word 4 + +typedef struct { + uint32_t length; + uint32_t *word; +} bitvector_t; + +#define bitvector_get_bit(v, bit_index) \ + (((((v)->word[((bit_index) >> 5)]) >> ((bit_index)&31)) & 1)) + +#define bitvector_set_bit(v, bit_index) \ + ((((v)->word[((bit_index) >> 5)] |= ((uint32_t)1 << ((bit_index)&31))))) + +#define bitvector_get_length(v) (((v)->length)) + +int bitvector_alloc(bitvector_t *v, unsigned long length); + +void bitvector_dealloc(bitvector_t *v); + +void bitvector_set_to_zero(bitvector_t *x); + +void bitvector_left_shift(bitvector_t *x, int index); + +#ifdef __cplusplus +} +#endif + +#endif /* DATATYPES_H */ diff --git a/third_party/libsrtp/src/crypto/include/err.h b/third_party/libsrtp/src/crypto/include/err.h new file mode 100644 index 0000000000..326f5e96b7 --- /dev/null +++ b/third_party/libsrtp/src/crypto/include/err.h @@ -0,0 +1,139 @@ +/* + * err.h + * + * error status codes + * + * David A. McGrew + * Cisco Systems, Inc. + */ +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef ERR_H +#define ERR_H + +#include <stdio.h> +#include <stdarg.h> +#include "srtp.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * @defgroup Error Error Codes + * + * Error status codes are represented by the enumeration srtp_err_status_t. + * + * @{ + */ + +/** + * @} + */ + +typedef enum { + srtp_err_level_error, + srtp_err_level_warning, + srtp_err_level_info, + srtp_err_level_debug +} srtp_err_reporting_level_t; + +/* + * err_reporting_init prepares the error system. If + * ERR_REPORTING_STDOUT is defined, it will log to stdout. + * + */ + +srtp_err_status_t srtp_err_reporting_init(void); + +typedef void(srtp_err_report_handler_func_t)(srtp_err_reporting_level_t level, + const char *msg); + +srtp_err_status_t srtp_install_err_report_handler( + srtp_err_report_handler_func_t func); + +/* + * srtp_err_report reports a 'printf' formatted error + * string, followed by a an arg list. The level argument + * is one of srtp_err_reporting_level_t. + * + * Errors will be reported to stdout, if ERR_REPORTING_STDOUT + * is defined. + * + */ + +void srtp_err_report(srtp_err_reporting_level_t level, const char *format, ...); + +/* + * debug_module_t defines a debug module + */ + +typedef struct { + int on; /* 1 if debugging is on, 0 if it is off */ + const char *name; /* printable name for debug module */ +} srtp_debug_module_t; + +#ifdef ENABLE_DEBUG_LOGGING + +#define debug_print0(mod, format) \ + srtp_err_report(srtp_err_level_debug, ("%s: " format "\n"), mod.name) +#define debug_print(mod, format, arg) \ + srtp_err_report(srtp_err_level_debug, ("%s: " format "\n"), mod.name, arg) +#define debug_print2(mod, format, arg1, arg2) \ + srtp_err_report(srtp_err_level_debug, ("%s: " format "\n"), mod.name, \ + arg1, arg2) + +#else + +#define debug_print0(mod, format) \ + if (mod.on) \ + srtp_err_report(srtp_err_level_debug, ("%s: " format "\n"), mod.name) +#define debug_print(mod, format, arg) \ + if (mod.on) \ + srtp_err_report(srtp_err_level_debug, ("%s: " format "\n"), mod.name, arg) +#define debug_print2(mod, format, arg1, arg2) \ + if (mod.on) \ + srtp_err_report(srtp_err_level_debug, ("%s: " format "\n"), mod.name, \ + arg1, arg2) + +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* ERR_H */ diff --git a/third_party/libsrtp/src/crypto/include/hmac.h b/third_party/libsrtp/src/crypto/include/hmac.h new file mode 100644 index 0000000000..148818122c --- /dev/null +++ b/third_party/libsrtp/src/crypto/include/hmac.h @@ -0,0 +1,58 @@ +/* + * hmac.h + * + * interface to hmac srtp_auth_type_t + * + * David A. McGrew + * Cisco Systems, Inc. + * + */ +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef HMAC_H +#define HMAC_H + +#include "auth.h" +#include "sha1.h" + +typedef struct { + uint8_t opad[64]; + srtp_sha1_ctx_t ctx; + srtp_sha1_ctx_t init_ctx; +} srtp_hmac_ctx_t; + +#endif /* HMAC_H */ diff --git a/third_party/libsrtp/src/crypto/include/integers.h b/third_party/libsrtp/src/crypto/include/integers.h new file mode 100644 index 0000000000..f2cd7c064d --- /dev/null +++ b/third_party/libsrtp/src/crypto/include/integers.h @@ -0,0 +1,146 @@ +/* + * integers.h + * + * defines integer types (or refers to their definitions) + * + * David A. McGrew + * Cisco Systems, Inc. + */ + +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef INTEGERS_H +#define INTEGERS_H + +/* use standard integer definitions, if they're available */ +#ifdef HAVE_STDLIB_H +#include <stdlib.h> +#endif +#ifdef HAVE_STDINT_H +#include <stdint.h> +#endif +#ifdef HAVE_INTTYPES_H +#include <inttypes.h> +#endif +#ifdef HAVE_SYS_TYPES_H +#include <sys/types.h> +#endif +#ifdef HAVE_SYS_INT_TYPES_H +#include <sys/int_types.h> /* this exists on Sun OS */ +#endif +#ifdef HAVE_MACHINE_TYPES_H +#include <machine/types.h> +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +/* Can we do 64 bit integers? */ +#if !defined(HAVE_UINT64_T) +#if SIZEOF_UNSIGNED_LONG == 8 +typedef unsigned long uint64_t; +#elif SIZEOF_UNSIGNED_LONG_LONG == 8 +typedef unsigned long long uint64_t; +#else +#define NO_64BIT_MATH 1 +#endif +#endif + +/* Reasonable defaults for 32 bit machines - you may need to + * edit these definitions for your own machine. */ +#ifndef HAVE_UINT8_T +typedef unsigned char uint8_t; +#endif +#ifndef HAVE_UINT16_T +typedef unsigned short int uint16_t; +#endif +#ifndef HAVE_UINT32_T +typedef unsigned int uint32_t; +#endif +#ifndef HAVE_INT32_T +typedef int int32_t; +#endif + +#if defined(NO_64BIT_MATH) && defined(HAVE_CONFIG_H) +typedef double uint64_t; +/* assert that sizeof(double) == 8 */ +extern uint64_t make64(uint32_t high, uint32_t low); +extern uint32_t high32(uint64_t value); +extern uint32_t low32(uint64_t value); +#endif + +/* These macros are to load and store 32-bit values from un-aligned + addresses. This is required for processors that do not allow unaligned + loads. */ +#ifdef ALIGNMENT_32BIT_REQUIRED +/* Note that if it's in a variable, you can memcpy it */ +#ifdef WORDS_BIGENDIAN +#define PUT_32(addr, value) \ + { \ + ((unsigned char *)(addr))[0] = (value >> 24); \ + ((unsigned char *)(addr))[1] = (value >> 16) & 0xff; \ + ((unsigned char *)(addr))[2] = (value >> 8) & 0xff; \ + ((unsigned char *)(addr))[3] = (value)&0xff; \ + } +#define GET_32(addr) \ + ((((unsigned char *)(addr))[0] << 24) | \ + (((unsigned char *)(addr))[1] << 16) | \ + (((unsigned char *)(addr))[2] << 8) | (((unsigned char *)(addr))[3])) +#else +#define PUT_32(addr, value) \ + { \ + ((unsigned char *)(addr))[3] = (value >> 24); \ + ((unsigned char *)(addr))[2] = (value >> 16) & 0xff; \ + ((unsigned char *)(addr))[1] = (value >> 8) & 0xff; \ + ((unsigned char *)(addr))[0] = (value)&0xff; \ + } +#define GET_32(addr) \ + ((((unsigned char *)(addr))[3] << 24) | \ + (((unsigned char *)(addr))[2] << 16) | \ + (((unsigned char *)(addr))[1] << 8) | (((unsigned char *)(addr))[0])) +#endif // WORDS_BIGENDIAN +#else +#define PUT_32(addr, value) *(((uint32_t *) (addr)) = (value) +#define GET_32(addr) (*(((uint32_t *) (addr))) +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* INTEGERS_H */ diff --git a/third_party/libsrtp/src/crypto/include/key.h b/third_party/libsrtp/src/crypto/include/key.h new file mode 100644 index 0000000000..4164722c7c --- /dev/null +++ b/third_party/libsrtp/src/crypto/include/key.h @@ -0,0 +1,86 @@ +/* + * key.h + * + * key usage limits enforcement + * + * David A. Mcgrew + * Cisco Systems, Inc. + */ +/* + * + * Copyright (c) 2001-2017 Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef KEY_H +#define KEY_H + +#include "rdbx.h" /* for srtp_xtd_seq_num_t */ +#include "err.h" + +#ifdef __cplusplus +extern "C" { +#endif + +typedef struct srtp_key_limit_ctx_t *srtp_key_limit_t; + +typedef enum { + srtp_key_event_normal, + srtp_key_event_soft_limit, + srtp_key_event_hard_limit +} srtp_key_event_t; + +srtp_err_status_t srtp_key_limit_set(srtp_key_limit_t key, + const srtp_xtd_seq_num_t s); + +srtp_err_status_t srtp_key_limit_clone(srtp_key_limit_t original, + srtp_key_limit_t *new_key); + +srtp_key_event_t srtp_key_limit_update(srtp_key_limit_t key); + +typedef enum { + srtp_key_state_normal, + srtp_key_state_past_soft_limit, + srtp_key_state_expired +} srtp_key_state_t; + +typedef struct srtp_key_limit_ctx_t { + srtp_xtd_seq_num_t num_left; + srtp_key_state_t state; +} srtp_key_limit_ctx_t; + +#ifdef __cplusplus +} +#endif + +#endif /* KEY_H */ diff --git a/third_party/libsrtp/src/crypto/include/null_auth.h b/third_party/libsrtp/src/crypto/include/null_auth.h new file mode 100644 index 0000000000..0e57d67061 --- /dev/null +++ b/third_party/libsrtp/src/crypto/include/null_auth.h @@ -0,0 +1,62 @@ +/* + * null-auth.h + * + * David A. McGrew + * Cisco Systems, Inc. + * + */ + +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef NULL_AUTH_H +#define NULL_AUTH_H + +#include "auth.h" + +#ifdef __cplusplus +extern "C" { +#endif + +typedef struct { + char foo; +} srtp_null_auth_ctx_t; + +#ifdef __cplusplus +} +#endif + +#endif /* NULL_AUTH_H */ diff --git a/third_party/libsrtp/src/crypto/include/null_cipher.h b/third_party/libsrtp/src/crypto/include/null_cipher.h new file mode 100644 index 0000000000..5e8c91c134 --- /dev/null +++ b/third_party/libsrtp/src/crypto/include/null_cipher.h @@ -0,0 +1,57 @@ +/* + * null-cipher.h + * + * header file for the null cipher + * + * + * David A. McGrew + * Cisco Systems, Inc. + */ + +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef NULL_CIPHER_H +#define NULL_CIPHER_H + +#include "datatypes.h" +#include "cipher.h" + +typedef struct { + char foo; /* empty, for now */ +} srtp_null_cipher_ctx_t; + +#endif /* NULL_CIPHER_H */ diff --git a/third_party/libsrtp/src/crypto/include/rdb.h b/third_party/libsrtp/src/crypto/include/rdb.h new file mode 100644 index 0000000000..208dff3ff1 --- /dev/null +++ b/third_party/libsrtp/src/crypto/include/rdb.h @@ -0,0 +1,123 @@ +/* + * replay-database.h + * + * interface for a replay database for packet security + * + * David A. McGrew + * Cisco Systems, Inc. + */ + +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef REPLAY_DB_H +#define REPLAY_DB_H + +#include "integers.h" /* for uint32_t */ +#include "datatypes.h" /* for v128_t */ +#include "err.h" /* for srtp_err_status_t */ + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * if the ith least significant bit is one, then the packet index + * window_end-i is in the database + */ + +typedef struct { + uint32_t window_start; /* packet index of the first bit in bitmask */ + v128_t bitmask; +} srtp_rdb_t; + +/* + * srtp_rdb_init + * + * initalizes rdb + * + * returns srtp_err_status_ok on success, srtp_err_status_t_fail otherwise + */ +srtp_err_status_t srtp_rdb_init(srtp_rdb_t *rdb); + +/* + * srtp_rdb_check + * + * checks to see if index appears in rdb + * + * returns srtp_err_status_fail if the index already appears in rdb, + * returns srtp_err_status_ok otherwise + */ +srtp_err_status_t srtp_rdb_check(const srtp_rdb_t *rdb, uint32_t rdb_index); + +/* + * srtp_rdb_add_index + * + * adds index to srtp_rdb_t (and does *not* check if index appears in db) + * + * returns srtp_err_status_ok on success, srtp_err_status_fail otherwise + * + */ +srtp_err_status_t srtp_rdb_add_index(srtp_rdb_t *rdb, uint32_t rdb_index); + +/* + * the functions srtp_rdb_increment() and srtp_rdb_get_value() are for use by + * senders, not receivers - DO NOT use these functions on the same + * srtp_rdb_t upon which srtp_rdb_add_index is used! + */ + +/* + * srtp_rdb_increment(db) increments the sequence number in db, if it is + * not too high + * + * return values: + * + * srtp_err_status_ok no problem + * srtp_err_status_key_expired sequence number too high + * + */ +srtp_err_status_t srtp_rdb_increment(srtp_rdb_t *rdb); + +/* + * srtp_rdb_get_value(db) returns the current sequence number of db + */ +uint32_t srtp_rdb_get_value(const srtp_rdb_t *rdb); + +#ifdef __cplusplus +} +#endif + +#endif /* REPLAY_DB_H */ diff --git a/third_party/libsrtp/src/crypto/include/rdbx.h b/third_party/libsrtp/src/crypto/include/rdbx.h new file mode 100644 index 0000000000..2194178ee2 --- /dev/null +++ b/third_party/libsrtp/src/crypto/include/rdbx.h @@ -0,0 +1,209 @@ +/* + * rdbx.h + * + * replay database with extended packet indices, using a rollover counter + * + * David A. McGrew + * Cisco Systems, Inc. + * + */ + +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef RDBX_H +#define RDBX_H + +#include "datatypes.h" +#include "err.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* #define ROC_TEST */ + +#ifndef ROC_TEST + +typedef uint16_t srtp_sequence_number_t; /* 16 bit sequence number */ +typedef uint32_t srtp_rollover_counter_t; /* 32 bit rollover counter */ + +#else /* use small seq_num and roc datatypes for testing purposes */ + +typedef unsigned char srtp_sequence_number_t; /* 8 bit sequence number */ +typedef uint16_t srtp_rollover_counter_t; /* 16 bit rollover counter */ + +#endif + +#define seq_num_median (1 << (8 * sizeof(srtp_sequence_number_t) - 1)) +#define seq_num_max (1 << (8 * sizeof(srtp_sequence_number_t))) + +/* + * An rtp_xtd_seq_num_t is a 64-bit unsigned integer used as an 'extended' + * sequence number. + */ +typedef uint64_t srtp_xtd_seq_num_t; + +/* + * An srtp_rdbx_t is a replay database with extended range; it uses an + * xtd_seq_num_t and a bitmask of recently received indices. + */ +typedef struct { + srtp_xtd_seq_num_t index; + bitvector_t bitmask; +} srtp_rdbx_t; + +/* + * srtp_rdbx_init(rdbx_ptr, ws) + * + * initializes the rdbx pointed to by its argument with the window size ws, + * setting the rollover counter and sequence number to zero + */ +srtp_err_status_t srtp_rdbx_init(srtp_rdbx_t *rdbx, unsigned long ws); + +/* + * srtp_rdbx_dealloc(rdbx_ptr) + * + * frees memory associated with the rdbx + */ +srtp_err_status_t srtp_rdbx_dealloc(srtp_rdbx_t *rdbx); + +/* + * srtp_rdbx_estimate_index(rdbx, guess, s) + * + * given an rdbx and a sequence number s (from a newly arrived packet), + * sets the contents of *guess to contain the best guess of the packet + * index to which s corresponds, and returns the difference between + * *guess and the locally stored synch info + */ +int32_t srtp_rdbx_estimate_index(const srtp_rdbx_t *rdbx, + srtp_xtd_seq_num_t *guess, + srtp_sequence_number_t s); + +/* + * srtp_rdbx_check(rdbx, delta); + * + * srtp_rdbx_check(&r, delta) checks to see if the xtd_seq_num_t + * which is at rdbx->window_start + delta is in the rdb + * + */ +srtp_err_status_t srtp_rdbx_check(const srtp_rdbx_t *rdbx, int difference); + +/* + * srtp_replay_add_index(rdbx, delta) + * + * adds the srtp_xtd_seq_num_t at rdbx->window_start + delta to replay_db + * (and does *not* check if that xtd_seq_num_t appears in db) + * + * this function should be called *only* after replay_check has + * indicated that the index does not appear in the rdbx, and a mutex + * should protect the rdbx between these calls if necessary. + */ +srtp_err_status_t srtp_rdbx_add_index(srtp_rdbx_t *rdbx, int delta); + +/* + * srtp_rdbx_set_roc(rdbx, roc) initalizes the srtp_rdbx_t at the location rdbx + * to have the rollover counter value roc. If that value is less than + * the current rollover counter value, then the function returns + * srtp_err_status_replay_old; otherwise, srtp_err_status_ok is returned. + * + */ +srtp_err_status_t srtp_rdbx_set_roc(srtp_rdbx_t *rdbx, uint32_t roc); + +/* + * srtp_rdbx_get_packet_index(rdbx) returns the value of the rollover counter + * for + * the srtp_rdbx_t pointed to by rdbx + * + */ +srtp_xtd_seq_num_t srtp_rdbx_get_packet_index(const srtp_rdbx_t *rdbx); + +/* + * srtp_xtd_seq_num_t functions - these are *internal* functions of rdbx, and + * shouldn't be used to manipulate rdbx internal values. use the rdbx + * api instead! + */ + +/* + * srtp_rdbx_get_ws(rdbx_ptr) + * + * gets the window size which was used to initialize the rdbx + */ +unsigned long srtp_rdbx_get_window_size(const srtp_rdbx_t *rdbx); + +/* index_init(&pi) initializes a packet index pi (sets it to zero) */ +void srtp_index_init(srtp_xtd_seq_num_t *pi); + +/* index_advance(&pi, s) advances a xtd_seq_num_t forward by s */ +void srtp_index_advance(srtp_xtd_seq_num_t *pi, srtp_sequence_number_t s); + +/* + * srtp_index_guess(local, guess, s) + * + * given a srtp_xtd_seq_num_t local (which represents the highest + * known-to-be-good index) and a sequence number s (from a newly + * arrived packet), sets the contents of *guess to contain the best + * guess of the packet index to which s corresponds, and returns the + * difference between *guess and *local + */ +int32_t srtp_index_guess(const srtp_xtd_seq_num_t *local, + srtp_xtd_seq_num_t *guess, + srtp_sequence_number_t s); + +/* + * srtp_rdbx_get_roc(rdbx) + * + * Get the current rollover counter + * + */ +uint32_t srtp_rdbx_get_roc(const srtp_rdbx_t *rdbx); + +/* + * srtp_rdbx_set_roc_seq(rdbx, roc, seq) initalizes the srtp_rdbx_t at the + * location rdbx to have the rollover counter value roc and packet sequence + * number seq. If the new rollover counter value is less than the current + * rollover counter value, then the function returns + * srtp_err_status_replay_old, otherwise, srtp_err_status_ok is returned. + */ +srtp_err_status_t srtp_rdbx_set_roc_seq(srtp_rdbx_t *rdbx, + uint32_t roc, + uint16_t seq); + +#ifdef __cplusplus +} +#endif + +#endif /* RDBX_H */ diff --git a/third_party/libsrtp/src/crypto/include/sha1.h b/third_party/libsrtp/src/crypto/include/sha1.h new file mode 100644 index 0000000000..c9bf592dff --- /dev/null +++ b/third_party/libsrtp/src/crypto/include/sha1.h @@ -0,0 +1,90 @@ +/* + * sha1.h + * + * interface to the Secure Hash Algorithm v.1 (SHA-1), specified in + * FIPS 180-1 + * + * David A. McGrew + * Cisco Systems, Inc. + */ + +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef SHA1_H +#define SHA1_H + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "err.h" +#include "datatypes.h" + +#ifdef __cplusplus +extern "C" { +#endif + +typedef struct { + uint32_t H[5]; /* state vector */ + uint32_t M[16]; /* message buffer */ + int octets_in_buffer; /* octets of message in buffer */ + uint32_t num_bits_in_msg; /* total number of bits in message */ +} srtp_sha1_ctx_t; + +/* + * srtp_sha1_init(&ctx) initializes the SHA1 context ctx + * + * srtp_sha1_update(&ctx, msg, len) hashes the len octets starting at msg + * into the SHA1 context + * + * srtp_sha1_final(&ctx, output) performs the final processing of the SHA1 + * context and writes the result to the 20 octets at output + * + */ +void srtp_sha1_init(srtp_sha1_ctx_t *ctx); + +void srtp_sha1_update(srtp_sha1_ctx_t *ctx, + const uint8_t *M, + int octets_in_msg); + +void srtp_sha1_final(srtp_sha1_ctx_t *ctx, uint32_t output[5]); + +#ifdef __cplusplus +} +#endif + +#endif /* SHA1_H */ diff --git a/third_party/libsrtp/src/crypto/kernel/alloc.c b/third_party/libsrtp/src/crypto/kernel/alloc.c new file mode 100644 index 0000000000..3ebc315259 --- /dev/null +++ b/third_party/libsrtp/src/crypto/kernel/alloc.c @@ -0,0 +1,101 @@ +/* + * alloc.c + * + * memory allocation and deallocation + * + * David A. McGrew + * Cisco Systems, Inc. + */ +/* + * + * Copyright (c) 2001-2017 Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "alloc.h" +#include "crypto_kernel.h" + +/* the debug module for memory allocation */ + +srtp_debug_module_t srtp_mod_alloc = { + 0, /* debugging is off by default */ + "alloc" /* printable name for module */ +}; + +/* + * Nota bene: the debugging statements for srtp_crypto_alloc() and + * srtp_crypto_free() have identical prefixes, which include the addresses + * of the memory locations on which they are operating. This fact can + * be used to locate memory leaks, by turning on memory debugging, + * grepping for 'alloc', then matching alloc and free calls by + * address. + */ + +#if defined(HAVE_STDLIB_H) + +void *srtp_crypto_alloc(size_t size) +{ + void *ptr; + + if (!size) { + return NULL; + } + + ptr = calloc(1, size); + + if (ptr) { + debug_print(srtp_mod_alloc, "(location: %p) allocated", ptr); + } else { + debug_print(srtp_mod_alloc, "allocation failed (asked for %zu bytes)\n", + size); + } + + return ptr; +} + +void srtp_crypto_free(void *ptr) +{ + debug_print(srtp_mod_alloc, "(location: %p) freed", ptr); + + free(ptr); +} + +#else /* we need to define our own memory allocation routines */ + +#error no memory allocation defined yet + +#endif diff --git a/third_party/libsrtp/src/crypto/kernel/crypto_kernel.c b/third_party/libsrtp/src/crypto/kernel/crypto_kernel.c new file mode 100644 index 0000000000..764e7ecfa0 --- /dev/null +++ b/third_party/libsrtp/src/crypto/kernel/crypto_kernel.c @@ -0,0 +1,559 @@ +/* + * crypto_kernel.c + * + * header for the cryptographic kernel + * + * David A. McGrew + * Cisco Systems, Inc. + */ +/* + * + * Copyright(c) 2001-2017 Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "alloc.h" + +#include "crypto_kernel.h" +#include "cipher_types.h" + +/* the debug module for the crypto_kernel */ + +srtp_debug_module_t srtp_mod_crypto_kernel = { + 0, /* debugging is off by default */ + "crypto kernel" /* printable name for module */ +}; + +/* crypto_kernel is a global variable, the only one of its datatype */ + +srtp_crypto_kernel_t crypto_kernel = { + srtp_crypto_kernel_state_insecure, /* start off in insecure state */ + NULL, /* no cipher types yet */ + NULL, /* no auth types yet */ + NULL /* no debug modules yet */ +}; + +#define MAX_RNG_TRIALS 25 + +srtp_err_status_t srtp_crypto_kernel_init() +{ + srtp_err_status_t status; + + /* check the security state */ + if (crypto_kernel.state == srtp_crypto_kernel_state_secure) { + /* + * we're already in the secure state, but we've been asked to + * re-initialize, so we just re-run the self-tests and then return + */ + return srtp_crypto_kernel_status(); + } + + /* initialize error reporting system */ + status = srtp_err_reporting_init(); + if (status) { + return status; + } + + /* load debug modules */ + status = srtp_crypto_kernel_load_debug_module(&srtp_mod_crypto_kernel); + if (status) { + return status; + } + status = srtp_crypto_kernel_load_debug_module(&srtp_mod_auth); + if (status) { + return status; + } + status = srtp_crypto_kernel_load_debug_module(&srtp_mod_cipher); + if (status) { + return status; + } + status = srtp_crypto_kernel_load_debug_module(&srtp_mod_alloc); + if (status) { + return status; + } + + /* load cipher types */ + status = srtp_crypto_kernel_load_cipher_type(&srtp_null_cipher, + SRTP_NULL_CIPHER); + if (status) { + return status; + } + status = srtp_crypto_kernel_load_cipher_type(&srtp_aes_icm_128, + SRTP_AES_ICM_128); + if (status) { + return status; + } + status = srtp_crypto_kernel_load_cipher_type(&srtp_aes_icm_256, + SRTP_AES_ICM_256); + if (status) { + return status; + } + status = srtp_crypto_kernel_load_debug_module(&srtp_mod_aes_icm); + if (status) { + return status; + } +#ifdef GCM + status = srtp_crypto_kernel_load_cipher_type(&srtp_aes_icm_192, + SRTP_AES_ICM_192); + if (status) { + return status; + } + status = srtp_crypto_kernel_load_cipher_type(&srtp_aes_gcm_128, + SRTP_AES_GCM_128); + if (status) { + return status; + } + status = srtp_crypto_kernel_load_cipher_type(&srtp_aes_gcm_256, + SRTP_AES_GCM_256); + if (status) { + return status; + } + status = srtp_crypto_kernel_load_debug_module(&srtp_mod_aes_gcm); + if (status) { + return status; + } +#endif + + /* load auth func types */ + status = srtp_crypto_kernel_load_auth_type(&srtp_null_auth, SRTP_NULL_AUTH); + if (status) { + return status; + } + status = srtp_crypto_kernel_load_auth_type(&srtp_hmac, SRTP_HMAC_SHA1); + if (status) { + return status; + } + status = srtp_crypto_kernel_load_debug_module(&srtp_mod_hmac); + if (status) { + return status; + } + + /* change state to secure */ + crypto_kernel.state = srtp_crypto_kernel_state_secure; + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_crypto_kernel_status() +{ + srtp_err_status_t status; + srtp_kernel_cipher_type_t *ctype = crypto_kernel.cipher_type_list; + srtp_kernel_auth_type_t *atype = crypto_kernel.auth_type_list; + + /* for each cipher type, describe and test */ + while (ctype != NULL) { + srtp_err_report(srtp_err_level_info, "cipher: %s\n", + ctype->cipher_type->description); + srtp_err_report(srtp_err_level_info, " self-test: "); + status = srtp_cipher_type_self_test(ctype->cipher_type); + if (status) { + srtp_err_report(srtp_err_level_error, "failed with error code %d\n", + status); + exit(status); + } + srtp_err_report(srtp_err_level_info, "passed\n"); + ctype = ctype->next; + } + + /* for each auth type, describe and test */ + while (atype != NULL) { + srtp_err_report(srtp_err_level_info, "auth func: %s\n", + atype->auth_type->description); + srtp_err_report(srtp_err_level_info, " self-test: "); + status = srtp_auth_type_self_test(atype->auth_type); + if (status) { + srtp_err_report(srtp_err_level_error, "failed with error code %d\n", + status); + exit(status); + } + srtp_err_report(srtp_err_level_info, "passed\n"); + atype = atype->next; + } + + srtp_crypto_kernel_list_debug_modules(); + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_crypto_kernel_list_debug_modules() +{ + srtp_kernel_debug_module_t *dm = crypto_kernel.debug_module_list; + + /* describe each debug module */ + srtp_err_report(srtp_err_level_info, "debug modules loaded:\n"); + while (dm != NULL) { + srtp_err_report(srtp_err_level_info, " %s ", dm->mod->name); + if (dm->mod->on) { + srtp_err_report(srtp_err_level_info, "(on)\n"); + } else { + srtp_err_report(srtp_err_level_info, "(off)\n"); + } + dm = dm->next; + } + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_crypto_kernel_shutdown() +{ + /* + * free dynamic memory used in crypto_kernel at present + */ + + /* walk down cipher type list, freeing memory */ + while (crypto_kernel.cipher_type_list != NULL) { + srtp_kernel_cipher_type_t *ctype = crypto_kernel.cipher_type_list; + crypto_kernel.cipher_type_list = ctype->next; + debug_print(srtp_mod_crypto_kernel, "freeing memory for cipher %s", + ctype->cipher_type->description); + srtp_crypto_free(ctype); + } + + /* walk down authetication module list, freeing memory */ + while (crypto_kernel.auth_type_list != NULL) { + srtp_kernel_auth_type_t *atype = crypto_kernel.auth_type_list; + crypto_kernel.auth_type_list = atype->next; + debug_print(srtp_mod_crypto_kernel, + "freeing memory for authentication %s", + atype->auth_type->description); + srtp_crypto_free(atype); + } + + /* walk down debug module list, freeing memory */ + while (crypto_kernel.debug_module_list != NULL) { + srtp_kernel_debug_module_t *kdm = crypto_kernel.debug_module_list; + crypto_kernel.debug_module_list = kdm->next; + debug_print(srtp_mod_crypto_kernel, + "freeing memory for debug module %s", kdm->mod->name); + srtp_crypto_free(kdm); + } + + /* return to insecure state */ + crypto_kernel.state = srtp_crypto_kernel_state_insecure; + + return srtp_err_status_ok; +} + +static inline srtp_err_status_t srtp_crypto_kernel_do_load_cipher_type( + const srtp_cipher_type_t *new_ct, + srtp_cipher_type_id_t id, + int replace) +{ + srtp_kernel_cipher_type_t *ctype; + srtp_kernel_cipher_type_t *new_ctype = NULL; + srtp_err_status_t status; + + /* defensive coding */ + if (new_ct == NULL) { + return srtp_err_status_bad_param; + } + + if (new_ct->id != id) { + return srtp_err_status_bad_param; + } + + /* check cipher type by running self-test */ + status = srtp_cipher_type_self_test(new_ct); + if (status) { + return status; + } + + /* walk down list, checking if this type is in the list already */ + ctype = crypto_kernel.cipher_type_list; + while (ctype != NULL) { + if (id == ctype->id) { + if (!replace) { + return srtp_err_status_bad_param; + } + status = + srtp_cipher_type_test(new_ct, ctype->cipher_type->test_data); + if (status) { + return status; + } + new_ctype = ctype; + break; + } else if (new_ct == ctype->cipher_type) { + return srtp_err_status_bad_param; + } + ctype = ctype->next; + } + + /* if not found, put new_ct at the head of the list */ + if (ctype == NULL) { + /* allocate memory */ + new_ctype = (srtp_kernel_cipher_type_t *)srtp_crypto_alloc( + sizeof(srtp_kernel_cipher_type_t)); + if (new_ctype == NULL) { + return srtp_err_status_alloc_fail; + } + new_ctype->next = crypto_kernel.cipher_type_list; + + /* set head of list to new cipher type */ + crypto_kernel.cipher_type_list = new_ctype; + } + + /* set fields */ + new_ctype->cipher_type = new_ct; + new_ctype->id = id; + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_crypto_kernel_load_cipher_type( + const srtp_cipher_type_t *new_ct, + srtp_cipher_type_id_t id) +{ + return srtp_crypto_kernel_do_load_cipher_type(new_ct, id, 0); +} + +srtp_err_status_t srtp_replace_cipher_type(const srtp_cipher_type_t *new_ct, + srtp_cipher_type_id_t id) +{ + return srtp_crypto_kernel_do_load_cipher_type(new_ct, id, 1); +} + +srtp_err_status_t srtp_crypto_kernel_do_load_auth_type( + const srtp_auth_type_t *new_at, + srtp_auth_type_id_t id, + int replace) +{ + srtp_kernel_auth_type_t *atype; + srtp_kernel_auth_type_t *new_atype = NULL; + srtp_err_status_t status; + + /* defensive coding */ + if (new_at == NULL) { + return srtp_err_status_bad_param; + } + + if (new_at->id != id) { + return srtp_err_status_bad_param; + } + + /* check auth type by running self-test */ + status = srtp_auth_type_self_test(new_at); + if (status) { + return status; + } + + /* walk down list, checking if this type is in the list already */ + atype = crypto_kernel.auth_type_list; + while (atype != NULL) { + if (id == atype->id) { + if (!replace) { + return srtp_err_status_bad_param; + } + status = srtp_auth_type_test(new_at, atype->auth_type->test_data); + if (status) { + return status; + } + new_atype = atype; + break; + } else if (new_at == atype->auth_type) { + return srtp_err_status_bad_param; + } + atype = atype->next; + } + + /* if not found, put new_at at the head of the list */ + if (atype == NULL) { + /* allocate memory */ + new_atype = (srtp_kernel_auth_type_t *)srtp_crypto_alloc( + sizeof(srtp_kernel_auth_type_t)); + if (new_atype == NULL) { + return srtp_err_status_alloc_fail; + } + + new_atype->next = crypto_kernel.auth_type_list; + /* set head of list to new auth type */ + crypto_kernel.auth_type_list = new_atype; + } + + /* set fields */ + new_atype->auth_type = new_at; + new_atype->id = id; + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_crypto_kernel_load_auth_type( + const srtp_auth_type_t *new_at, + srtp_auth_type_id_t id) +{ + return srtp_crypto_kernel_do_load_auth_type(new_at, id, 0); +} + +srtp_err_status_t srtp_replace_auth_type(const srtp_auth_type_t *new_at, + srtp_auth_type_id_t id) +{ + return srtp_crypto_kernel_do_load_auth_type(new_at, id, 1); +} + +const srtp_cipher_type_t *srtp_crypto_kernel_get_cipher_type( + srtp_cipher_type_id_t id) +{ + srtp_kernel_cipher_type_t *ctype; + + /* walk down list, looking for id */ + ctype = crypto_kernel.cipher_type_list; + while (ctype != NULL) { + if (id == ctype->id) { + return ctype->cipher_type; + } + ctype = ctype->next; + } + + /* haven't found the right one, indicate failure by returning NULL */ + return NULL; +} + +srtp_err_status_t srtp_crypto_kernel_alloc_cipher(srtp_cipher_type_id_t id, + srtp_cipher_pointer_t *cp, + int key_len, + int tag_len) +{ + const srtp_cipher_type_t *ct; + + /* + * if the crypto_kernel is not yet initialized, we refuse to allocate + * any ciphers - this is a bit extra-paranoid + */ + if (crypto_kernel.state != srtp_crypto_kernel_state_secure) { + return srtp_err_status_init_fail; + } + + ct = srtp_crypto_kernel_get_cipher_type(id); + if (!ct) { + return srtp_err_status_fail; + } + + return ((ct)->alloc(cp, key_len, tag_len)); +} + +const srtp_auth_type_t *srtp_crypto_kernel_get_auth_type(srtp_auth_type_id_t id) +{ + srtp_kernel_auth_type_t *atype; + + /* walk down list, looking for id */ + atype = crypto_kernel.auth_type_list; + while (atype != NULL) { + if (id == atype->id) { + return atype->auth_type; + } + atype = atype->next; + } + + /* haven't found the right one, indicate failure by returning NULL */ + return NULL; +} + +srtp_err_status_t srtp_crypto_kernel_alloc_auth(srtp_auth_type_id_t id, + srtp_auth_pointer_t *ap, + int key_len, + int tag_len) +{ + const srtp_auth_type_t *at; + + /* + * if the crypto_kernel is not yet initialized, we refuse to allocate + * any auth functions - this is a bit extra-paranoid + */ + if (crypto_kernel.state != srtp_crypto_kernel_state_secure) { + return srtp_err_status_init_fail; + } + + at = srtp_crypto_kernel_get_auth_type(id); + if (!at) { + return srtp_err_status_fail; + } + + return ((at)->alloc(ap, key_len, tag_len)); +} + +srtp_err_status_t srtp_crypto_kernel_load_debug_module( + srtp_debug_module_t *new_dm) +{ + srtp_kernel_debug_module_t *kdm, *new; + + /* defensive coding */ + if (new_dm == NULL || new_dm->name == NULL) { + return srtp_err_status_bad_param; + } + + /* walk down list, checking if this type is in the list already */ + kdm = crypto_kernel.debug_module_list; + while (kdm != NULL) { + if (strncmp(new_dm->name, kdm->mod->name, 64) == 0) { + return srtp_err_status_bad_param; + } + kdm = kdm->next; + } + + /* put new_dm at the head of the list */ + /* allocate memory */ + new = (srtp_kernel_debug_module_t *)srtp_crypto_alloc( + sizeof(srtp_kernel_debug_module_t)); + if (new == NULL) { + return srtp_err_status_alloc_fail; + } + + /* set fields */ + new->mod = new_dm; + new->next = crypto_kernel.debug_module_list; + + /* set head of list to new cipher type */ + crypto_kernel.debug_module_list = new; + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_crypto_kernel_set_debug_module(const char *name, int on) +{ + srtp_kernel_debug_module_t *kdm; + + /* walk down list, checking if this type is in the list already */ + kdm = crypto_kernel.debug_module_list; + while (kdm != NULL) { + if (strncmp(name, kdm->mod->name, 64) == 0) { + kdm->mod->on = on; + return srtp_err_status_ok; + } + kdm = kdm->next; + } + + return srtp_err_status_fail; +} diff --git a/third_party/libsrtp/src/crypto/kernel/err.c b/third_party/libsrtp/src/crypto/kernel/err.c new file mode 100644 index 0000000000..9db5bfb432 --- /dev/null +++ b/third_party/libsrtp/src/crypto/kernel/err.c @@ -0,0 +1,108 @@ +/* + * err.c + * + * error status reporting functions + * + * David A. McGrew + * Cisco Systems, Inc. + */ +/* + * + * Copyright(c) 2001-2017 Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "err.h" +#include "datatypes.h" +#include <string.h> + +/* srtp_err_file is the FILE to which errors are reported */ + +static FILE *srtp_err_file = NULL; + +srtp_err_status_t srtp_err_reporting_init() +{ +#ifdef ERR_REPORTING_STDOUT + srtp_err_file = stdout; +#elif defined(ERR_REPORTING_FILE) + /* open file for error reporting */ + srtp_err_file = fopen(ERR_REPORTING_FILE, "w"); + if (srtp_err_file == NULL) { + return srtp_err_status_init_fail; + } +#endif + + return srtp_err_status_ok; +} + +static srtp_err_report_handler_func_t *srtp_err_report_handler = NULL; + +srtp_err_status_t srtp_install_err_report_handler( + srtp_err_report_handler_func_t func) +{ + srtp_err_report_handler = func; + return srtp_err_status_ok; +} + +void srtp_err_report(srtp_err_reporting_level_t level, const char *format, ...) +{ + char msg[512]; + va_list args; + if (srtp_err_file != NULL) { + va_start(args, format); + vfprintf(srtp_err_file, format, args); + va_end(args); + } + if (srtp_err_report_handler != NULL) { + va_start(args, format); + if (vsnprintf(msg, sizeof(msg), format, args) > 0) { + /* strip trailing \n, callback should not have one */ + size_t l = strlen(msg); + if (l && msg[l - 1] == '\n') { + msg[l - 1] = '\0'; + } + srtp_err_report_handler(level, msg); + /* + * NOTE, need to be carefull, there is a potential that + * octet_string_set_to_zero() could + * call srtp_err_report() in the future, leading to recursion + */ + octet_string_set_to_zero(msg, sizeof(msg)); + } + va_end(args); + } +} diff --git a/third_party/libsrtp/src/crypto/kernel/key.c b/third_party/libsrtp/src/crypto/kernel/key.c new file mode 100644 index 0000000000..5e6a188726 --- /dev/null +++ b/third_party/libsrtp/src/crypto/kernel/key.c @@ -0,0 +1,114 @@ +/* + * key.c + * + * key usage limits enforcement + * + * David A. Mcgrew + * Cisco Systems, Inc. + */ +/* + * + * Copyright (c) 2001-2017 Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "key.h" + +#define soft_limit 0x10000 + +srtp_err_status_t srtp_key_limit_set(srtp_key_limit_t key, + const srtp_xtd_seq_num_t s) +{ +#ifdef NO_64BIT_MATH + if (high32(s) == 0 && low32(s) < soft_limit) { + return srtp_err_status_bad_param; + } +#else + if (s < soft_limit) { + return srtp_err_status_bad_param; + } +#endif + key->num_left = s; + key->state = srtp_key_state_normal; + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_key_limit_clone(srtp_key_limit_t original, + srtp_key_limit_t *new_key) +{ + if (original == NULL) { + return srtp_err_status_bad_param; + } + *new_key = original; + return srtp_err_status_ok; +} + +srtp_key_event_t srtp_key_limit_update(srtp_key_limit_t key) +{ +#ifdef NO_64BIT_MATH + if (low32(key->num_left) == 0) { + // carry + key->num_left = + make64(high32(key->num_left) - 1, low32(key->num_left) - 1); + } else { + // no carry + key->num_left = make64(high32(key->num_left), low32(key->num_left) - 1); + } + if (high32(key->num_left) != 0 || low32(key->num_left) >= soft_limit) { + return srtp_key_event_normal; /* we're above the soft limit */ + } +#else + key->num_left--; + if (key->num_left >= soft_limit) { + return srtp_key_event_normal; /* we're above the soft limit */ + } +#endif + if (key->state == srtp_key_state_normal) { + /* we just passed the soft limit, so change the state */ + key->state = srtp_key_state_past_soft_limit; + } +#ifdef NO_64BIT_MATH + if (low32(key->num_left) == 0 && high32(key->num_left == 0)) +#else + if (key->num_left < 1) +#endif + { /* we just hit the hard limit */ + key->state = srtp_key_state_expired; + return srtp_key_event_hard_limit; + } + return srtp_key_event_soft_limit; +} diff --git a/third_party/libsrtp/src/crypto/math/datatypes.c b/third_party/libsrtp/src/crypto/math/datatypes.c new file mode 100644 index 0000000000..0eb9d919b5 --- /dev/null +++ b/third_party/libsrtp/src/crypto/math/datatypes.c @@ -0,0 +1,287 @@ +/* + * datatypes.c + * + * data types for finite fields and functions for input, output, and + * manipulation + * + * David A. McGrew + * Cisco Systems, Inc. + */ +/* + * + * Copyright (c) 2001-2017 Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#ifdef OPENSSL +#include <openssl/crypto.h> +#endif + +#include "datatypes.h" + +/* + * bit_string is a buffer that is used to hold output strings, e.g. + * for printing. + */ + +/* the value MAX_PRINT_STRING_LEN is defined in datatypes.h */ +/* include space for null terminator */ +static char bit_string[MAX_PRINT_STRING_LEN + 1]; + +uint8_t srtp_nibble_to_hex_char(uint8_t nibble) +{ + char buf[16] = { '0', '1', '2', '3', '4', '5', '6', '7', + '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' }; + return buf[nibble & 0xF]; +} + +char *srtp_octet_string_hex_string(const void *s, int length) +{ + const uint8_t *str = (const uint8_t *)s; + int i; + + /* double length, since one octet takes two hex characters */ + length *= 2; + + /* truncate string if it would be too long */ + if (length > MAX_PRINT_STRING_LEN) + length = MAX_PRINT_STRING_LEN - 2; + + for (i = 0; i < length; i += 2) { + bit_string[i] = srtp_nibble_to_hex_char(*str >> 4); + bit_string[i + 1] = srtp_nibble_to_hex_char(*str++ & 0xF); + } + bit_string[i] = 0; /* null terminate string */ + return bit_string; +} + +char *v128_hex_string(v128_t *x) +{ + int i, j; + + for (i = j = 0; i < 16; i++) { + bit_string[j++] = srtp_nibble_to_hex_char(x->v8[i] >> 4); + bit_string[j++] = srtp_nibble_to_hex_char(x->v8[i] & 0xF); + } + + bit_string[j] = 0; /* null terminate string */ + return bit_string; +} + +char *v128_bit_string(v128_t *x) +{ + int j, i; + uint32_t mask; + + for (j = i = 0; j < 4; j++) { + for (mask = 0x80000000; mask > 0; mask >>= 1) { + if (x->v32[j] & mask) + bit_string[i] = '1'; + else + bit_string[i] = '0'; + ++i; + } + } + bit_string[128] = 0; /* null terminate string */ + + return bit_string; +} + +void v128_copy_octet_string(v128_t *x, const uint8_t s[16]) +{ +#ifdef ALIGNMENT_32BIT_REQUIRED + if ((((uint32_t)&s[0]) & 0x3) != 0) +#endif + { + x->v8[0] = s[0]; + x->v8[1] = s[1]; + x->v8[2] = s[2]; + x->v8[3] = s[3]; + x->v8[4] = s[4]; + x->v8[5] = s[5]; + x->v8[6] = s[6]; + x->v8[7] = s[7]; + x->v8[8] = s[8]; + x->v8[9] = s[9]; + x->v8[10] = s[10]; + x->v8[11] = s[11]; + x->v8[12] = s[12]; + x->v8[13] = s[13]; + x->v8[14] = s[14]; + x->v8[15] = s[15]; + } +#ifdef ALIGNMENT_32BIT_REQUIRED + else { + v128_t *v = (v128_t *)&s[0]; + + v128_copy(x, v); + } +#endif +} + +void v128_left_shift(v128_t *x, int shift) +{ + int i; + const int base_index = shift >> 5; + const int bit_index = shift & 31; + + if (shift > 127) { + v128_set_to_zero(x); + return; + } + + if (bit_index == 0) { + for (i = 0; i < 4 - base_index; i++) + x->v32[i] = x->v32[i + base_index]; + } else { + for (i = 0; i < 4 - base_index - 1; i++) + x->v32[i] = (x->v32[i + base_index] >> bit_index) ^ + (x->v32[i + base_index + 1] << (32 - bit_index)); + x->v32[4 - base_index - 1] = x->v32[4 - 1] >> bit_index; + } + + /* now wrap up the final portion */ + for (i = 4 - base_index; i < 4; i++) + x->v32[i] = 0; +} + +/* functions manipulating bitvector_t */ + +int bitvector_alloc(bitvector_t *v, unsigned long length) +{ + unsigned long l; + + /* Round length up to a multiple of bits_per_word */ + length = + (length + bits_per_word - 1) & ~(unsigned long)((bits_per_word - 1)); + + l = length / bits_per_word * bytes_per_word; + + /* allocate memory, then set parameters */ + if (l == 0) { + v->word = NULL; + v->length = 0; + return -1; + } else { + v->word = (uint32_t *)srtp_crypto_alloc(l); + if (v->word == NULL) { + v->length = 0; + return -1; + } + } + v->length = length; + + /* initialize bitvector to zero */ + bitvector_set_to_zero(v); + + return 0; +} + +void bitvector_dealloc(bitvector_t *v) +{ + if (v->word != NULL) + srtp_crypto_free(v->word); + v->word = NULL; + v->length = 0; +} + +void bitvector_set_to_zero(bitvector_t *x) +{ + /* C99 guarantees that memset(0) will set the value 0 for uint32_t */ + memset(x->word, 0, x->length >> 3); +} + +void bitvector_left_shift(bitvector_t *x, int shift) +{ + int i; + const int base_index = shift >> 5; + const int bit_index = shift & 31; + const int word_length = x->length >> 5; + + if (shift >= (int)x->length) { + bitvector_set_to_zero(x); + return; + } + + if (bit_index == 0) { + for (i = 0; i < word_length - base_index; i++) + x->word[i] = x->word[i + base_index]; + } else { + for (i = 0; i < word_length - base_index - 1; i++) + x->word[i] = (x->word[i + base_index] >> bit_index) ^ + (x->word[i + base_index + 1] << (32 - bit_index)); + x->word[word_length - base_index - 1] = + x->word[word_length - 1] >> bit_index; + } + + /* now wrap up the final portion */ + for (i = word_length - base_index; i < word_length; i++) + x->word[i] = 0; +} + +int srtp_octet_string_is_eq(uint8_t *a, uint8_t *b, int len) +{ + uint8_t *end = b + len; + uint8_t accumulator = 0; + + /* + * We use this somewhat obscure implementation to try to ensure the running + * time only depends on len, even accounting for compiler optimizations. + * The accumulator ends up zero iff the strings are equal. + */ + while (b < end) + accumulator |= (*a++ ^ *b++); + + /* Return 1 if *not* equal. */ + return accumulator != 0; +} + +void srtp_cleanse(void *s, size_t len) +{ + volatile unsigned char *p = (volatile unsigned char *)s; + while (len--) + *p++ = 0; +} + +void octet_string_set_to_zero(void *s, size_t len) +{ +#if defined(OPENSSL) && !defined(OPENSSL_CLEANSE_BROKEN) + OPENSSL_cleanse(s, len); +#else + srtp_cleanse(s, len); +#endif +} diff --git a/third_party/libsrtp/src/crypto/replay/rdb.c b/third_party/libsrtp/src/crypto/replay/rdb.c new file mode 100644 index 0000000000..d8c2b3838e --- /dev/null +++ b/third_party/libsrtp/src/crypto/replay/rdb.c @@ -0,0 +1,139 @@ +/* + * rdb.c + * + * Implements a replay database for packet security + * + * David A. McGrew + * Cisco Systems, Inc. + */ + +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "rdb.h" + +#define rdb_bits_in_bitmask (8 * sizeof(v128_t)) + +/* + * this implementation of a replay database works as follows: + * + * window_start is the index of the first packet in the window + * bitmask a bit-buffer, containing the most recently entered + * index as the leftmost bit + * + */ + +/* srtp_rdb_init initalizes rdb */ +srtp_err_status_t srtp_rdb_init(srtp_rdb_t *rdb) +{ + v128_set_to_zero(&rdb->bitmask); + rdb->window_start = 0; + return srtp_err_status_ok; +} + +/* + * srtp_rdb_check checks to see if index appears in rdb + */ +srtp_err_status_t srtp_rdb_check(const srtp_rdb_t *rdb, uint32_t p_index) +{ + /* if the index appears after (or at very end of) the window, its good */ + if (p_index >= rdb->window_start + rdb_bits_in_bitmask) { + return srtp_err_status_ok; + } + + /* if the index appears before the window, its bad */ + if (p_index < rdb->window_start) { + return srtp_err_status_replay_old; + } + + /* otherwise, the index appears within the window, so check the bitmask */ + if (v128_get_bit(&rdb->bitmask, (p_index - rdb->window_start)) == 1) { + return srtp_err_status_replay_fail; + } + + /* otherwise, the index is okay */ + return srtp_err_status_ok; +} + +/* + * srtp_rdb_add_index adds index to srtp_rdb_t (and does *not* check if + * index appears in db) + * + * this function should be called only after srtp_rdb_check has + * indicated that the index does not appear in the rdb, e.g., a mutex + * should protect the rdb between these calls + */ +srtp_err_status_t srtp_rdb_add_index(srtp_rdb_t *rdb, uint32_t p_index) +{ + unsigned int delta; + + if (p_index < rdb->window_start) + return srtp_err_status_replay_fail; + + delta = (p_index - rdb->window_start); + if (delta < rdb_bits_in_bitmask) { + /* if the p_index is within the window, set the appropriate bit */ + v128_set_bit(&rdb->bitmask, delta); + + } else { + delta -= rdb_bits_in_bitmask - 1; + + /* shift the window forward by delta bits*/ + v128_left_shift(&rdb->bitmask, delta); + v128_set_bit(&rdb->bitmask, rdb_bits_in_bitmask - 1); + rdb->window_start += delta; + } + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_rdb_increment(srtp_rdb_t *rdb) +{ + if (rdb->window_start >= 0x7fffffff) { + return srtp_err_status_key_expired; + } + ++rdb->window_start; + return srtp_err_status_ok; +} + +uint32_t srtp_rdb_get_value(const srtp_rdb_t *rdb) +{ + return rdb->window_start; +} diff --git a/third_party/libsrtp/src/crypto/replay/rdbx.c b/third_party/libsrtp/src/crypto/replay/rdbx.c new file mode 100644 index 0000000000..40cba01a1f --- /dev/null +++ b/third_party/libsrtp/src/crypto/replay/rdbx.c @@ -0,0 +1,386 @@ +/* + * rdbx.c + * + * a replay database with extended range, using a rollover counter + * + * David A. McGrew + * Cisco Systems, Inc. + */ + +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "rdbx.h" + +/* + * from RFC 3711: + * + * A receiver reconstructs the index i of a packet with sequence + * number SEQ using the estimate + * + * i = 2^16 * v + SEQ, + * + * where v is chosen from the set { ROC-1, ROC, ROC+1 } such that i is + * closest to the value 2^16 * ROC + s_l. If the value r+1 is used, + * then the rollover counter r in the cryptographic context is + * incremented by one (if the packet containing s is authentic). + */ + +/* + * rdbx implementation notes + * + * A srtp_xtd_seq_num_t is essentially a sequence number for which some of + * the data on the wire are implicit. It logically consists of a + * rollover counter and a sequence number; the sequence number is the + * explicit part, and the rollover counter is the implicit part. + * + * Upon receiving a sequence_number (e.g. in a newly received SRTP + * packet), the complete srtp_xtd_seq_num_t can be estimated by using a + * local srtp_xtd_seq_num_t as a basis. This is done using the function + * srtp_index_guess(&local, &guess, seq_from_packet). This function + * returns the difference of the guess and the local value. The local + * srtp_xtd_seq_num_t can be moved forward to the guess using the function + * srtp_index_advance(&guess, delta), where delta is the difference. + * + * + * A srtp_rdbx_t consists of a srtp_xtd_seq_num_t and a bitmask. The index is + * highest sequence number that has been received, and the bitmask indicates + * which of the recent indicies have been received as well. The + * highest bit in the bitmask corresponds to the index in the bitmask. + */ + +void srtp_index_init(srtp_xtd_seq_num_t *pi) +{ +#ifdef NO_64BIT_MATH + *pi = make64(0, 0); +#else + *pi = 0; +#endif +} + +void srtp_index_advance(srtp_xtd_seq_num_t *pi, srtp_sequence_number_t s) +{ +#ifdef NO_64BIT_MATH + /* a > ~b means a+b will generate a carry */ + /* s is uint16 here */ + *pi = make64(high32(*pi) + (s > ~low32(*pi) ? 1 : 0), low32(*pi) + s); +#else + *pi += s; +#endif +} + +/* + * srtp_index_guess(local, guess, s) + * + * given a srtp_xtd_seq_num_t local (which represents the last + * known-to-be-good received srtp_xtd_seq_num_t) and a sequence number s + * (from a newly arrived packet), sets the contents of *guess to + * contain the best guess of the packet index to which s corresponds, + * and returns the difference between *guess and *local + * + * nota bene - the output is a signed integer, DON'T cast it to a + * unsigned integer! + */ + +int32_t srtp_index_guess(const srtp_xtd_seq_num_t *local, + srtp_xtd_seq_num_t *guess, + srtp_sequence_number_t s) +{ +#ifdef NO_64BIT_MATH + uint32_t local_roc = ((high32(*local) << 16) | (low32(*local) >> 16)); + uint16_t local_seq = (uint16_t)(low32(*local)); +#else + uint32_t local_roc = (uint32_t)(*local >> 16); + uint16_t local_seq = (uint16_t)*local; +#endif + uint32_t guess_roc; + uint16_t guess_seq; + int32_t difference; + + if (local_seq < seq_num_median) { + if (s - local_seq > seq_num_median) { + guess_roc = local_roc - 1; + difference = s - local_seq - seq_num_max; + } else { + guess_roc = local_roc; + difference = s - local_seq; + } + } else { + if (local_seq - seq_num_median > s) { + guess_roc = local_roc + 1; + difference = s - local_seq + seq_num_max; + } else { + guess_roc = local_roc; + difference = s - local_seq; + } + } + guess_seq = s; + +/* Note: guess_roc is 32 bits, so this generates a 48-bit result! */ +#ifdef NO_64BIT_MATH + *guess = make64(guess_roc >> 16, (guess_roc << 16) | guess_seq); +#else + *guess = (((uint64_t)guess_roc) << 16) | guess_seq; +#endif + + return difference; +} + +/* + * rdbx + * + */ + +/* + * srtp_rdbx_init(&r, ws) initializes the srtp_rdbx_t pointed to by r with + * window size ws + */ +srtp_err_status_t srtp_rdbx_init(srtp_rdbx_t *rdbx, unsigned long ws) +{ + if (ws == 0) { + return srtp_err_status_bad_param; + } + + if (bitvector_alloc(&rdbx->bitmask, ws) != 0) { + return srtp_err_status_alloc_fail; + } + + srtp_index_init(&rdbx->index); + + return srtp_err_status_ok; +} + +/* + * srtp_rdbx_dealloc(&r) frees memory for the srtp_rdbx_t pointed to by r + */ +srtp_err_status_t srtp_rdbx_dealloc(srtp_rdbx_t *rdbx) +{ + bitvector_dealloc(&rdbx->bitmask); + + return srtp_err_status_ok; +} + +/* + * srtp_rdbx_set_roc(rdbx, roc) initalizes the srtp_rdbx_t at the location rdbx + * to have the rollover counter value roc. If that value is less than + * the current rollover counter value, then the function returns + * srtp_err_status_replay_old; otherwise, srtp_err_status_ok is returned. + * + */ +srtp_err_status_t srtp_rdbx_set_roc(srtp_rdbx_t *rdbx, uint32_t roc) +{ + bitvector_set_to_zero(&rdbx->bitmask); + +#ifdef NO_64BIT_MATH +#error not yet implemented +#else + + /* make sure that we're not moving backwards */ + if (roc < (rdbx->index >> 16)) { + return srtp_err_status_replay_old; + } + + rdbx->index &= 0xffff; /* retain lowest 16 bits */ + rdbx->index |= ((uint64_t)roc) << 16; /* set ROC */ +#endif + + return srtp_err_status_ok; +} + +/* + * srtp_rdbx_get_packet_index(rdbx) returns the value of the packet index + * for the srtp_rdbx_t pointed to by rdbx + * + */ +srtp_xtd_seq_num_t srtp_rdbx_get_packet_index(const srtp_rdbx_t *rdbx) +{ + return rdbx->index; +} + +/* + * srtp_rdbx_get_window_size(rdbx) returns the value of the window size + * for the srtp_rdbx_t pointed to by rdbx + * + */ +unsigned long srtp_rdbx_get_window_size(const srtp_rdbx_t *rdbx) +{ + return bitvector_get_length(&rdbx->bitmask); +} + +/* + * srtp_rdbx_check(&r, delta) checks to see if the srtp_xtd_seq_num_t + * which is at rdbx->index + delta is in the rdb + */ +srtp_err_status_t srtp_rdbx_check(const srtp_rdbx_t *rdbx, int delta) +{ + if (delta > 0) { /* if delta is positive, it's good */ + return srtp_err_status_ok; + } else if ((int)(bitvector_get_length(&rdbx->bitmask) - 1) + delta < 0) { + /* if delta is lower than the bitmask, it's bad */ + return srtp_err_status_replay_old; + } else if (bitvector_get_bit( + &rdbx->bitmask, + (int)(bitvector_get_length(&rdbx->bitmask) - 1) + delta) == + 1) { + /* delta is within the window, so check the bitmask */ + return srtp_err_status_replay_fail; + } + /* otherwise, the index is okay */ + + return srtp_err_status_ok; +} + +/* + * srtp_rdbx_add_index adds the srtp_xtd_seq_num_t at rdbx->window_start + d to + * replay_db (and does *not* check if that srtp_xtd_seq_num_t appears in db) + * + * this function should be called only after replay_check has + * indicated that the index does not appear in the rdbx, e.g., a mutex + * should protect the rdbx between these calls if need be + */ +srtp_err_status_t srtp_rdbx_add_index(srtp_rdbx_t *rdbx, int delta) +{ + if (delta > 0) { + /* shift forward by delta */ + srtp_index_advance(&rdbx->index, delta); + bitvector_left_shift(&rdbx->bitmask, delta); + bitvector_set_bit(&rdbx->bitmask, + bitvector_get_length(&rdbx->bitmask) - 1); + } else { + /* delta is in window */ + bitvector_set_bit(&rdbx->bitmask, + bitvector_get_length(&rdbx->bitmask) - 1 + delta); + } + + /* note that we need not consider the case that delta == 0 */ + + return srtp_err_status_ok; +} + +/* + * srtp_rdbx_estimate_index(rdbx, guess, s) + * + * given an rdbx and a sequence number s (from a newly arrived packet), + * sets the contents of *guess to contain the best guess of the packet + * index to which s corresponds, and returns the difference between + * *guess and the locally stored synch info + */ +int32_t srtp_rdbx_estimate_index(const srtp_rdbx_t *rdbx, + srtp_xtd_seq_num_t *guess, + srtp_sequence_number_t s) +{ +/* + * if the sequence number and rollover counter in the rdbx are + * non-zero, then use the srtp_index_guess(...) function, otherwise, just + * set the rollover counter to zero (since the srtp_index_guess(...) + * function might incorrectly guess that the rollover counter is + * 0xffffffff) + */ + +#ifdef NO_64BIT_MATH + /* seq_num_median = 0x8000 */ + if (high32(rdbx->index) > 0 || low32(rdbx->index) > seq_num_median) +#else + if (rdbx->index > seq_num_median) +#endif + { + return srtp_index_guess(&rdbx->index, guess, s); + } + +#ifdef NO_64BIT_MATH + *guess = make64(0, (uint32_t)s); +#else + *guess = s; +#endif + +#ifdef NO_64BIT_MATH + return s - (uint16_t)low32(rdbx->index); +#else + return s - (uint16_t)rdbx->index; +#endif +} + +/* + * srtp_rdbx_get_roc(rdbx) + * + * Get the current rollover counter + * + */ +uint32_t srtp_rdbx_get_roc(const srtp_rdbx_t *rdbx) +{ + uint32_t roc; + +#ifdef NO_64BIT_MATH + roc = ((high32(rdbx->index) << 16) | (low32(rdbx->index) >> 16)); +#else + roc = (uint32_t)(rdbx->index >> 16); +#endif + + return roc; +} + +/* + * srtp_rdbx_set_roc_seq(rdbx, roc, seq) initalizes the srtp_rdbx_t at the + * location rdbx to have the rollover counter value roc and packet sequence + * number seq. If the new rollover counter value is less than the current + * rollover counter value, then the function returns + * srtp_err_status_replay_old, otherwise, srtp_err_status_ok is returned. + */ +srtp_err_status_t srtp_rdbx_set_roc_seq(srtp_rdbx_t *rdbx, + uint32_t roc, + uint16_t seq) +{ +#ifdef NO_64BIT_MATH +#error not yet implemented +#else + + /* make sure that we're not moving backwards */ + if (roc < (rdbx->index >> 16)) { + return srtp_err_status_replay_old; + } + + rdbx->index = seq; + rdbx->index |= ((uint64_t)roc) << 16; /* set ROC */ +#endif + + bitvector_set_to_zero(&rdbx->bitmask); + + return srtp_err_status_ok; +} diff --git a/third_party/libsrtp/src/crypto/test/aes_calc.c b/third_party/libsrtp/src/crypto/test/aes_calc.c new file mode 100644 index 0000000000..3d0d5cf36b --- /dev/null +++ b/third_party/libsrtp/src/crypto/test/aes_calc.c @@ -0,0 +1,172 @@ +/* + * aes_calc.c + * + * A simple AES calculator for generating AES encryption values + * + * David A. McGrew + * Cisco Systems, Inc. + */ + +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +/* + + Example usage (with first NIST FIPS 197 test case): + + [sh]$ test/aes_calc 000102030405060708090a0b0c0d0e0f \ + 00112233445566778899aabbccddeeff -v + + plaintext: 00112233445566778899aabbccddeeff + key: 000102030405060708090a0b0c0d0e0f + ciphertext: 69c4e0d86a7b0430d8cdb78070b4c55a + + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "aes.h" +#include <stdio.h> +#include <string.h> +#include "util.h" + +void usage(char *prog_name) +{ + printf("usage: %s <key> <plaintext> [<ciphertext>] [-v]\n", prog_name); + exit(255); +} + +#define AES_MAX_KEY_LEN 32 + +int main(int argc, char *argv[]) +{ + const char *expected_ciphertext = NULL; + const char *ciphertext = NULL; + v128_t data; + uint8_t key[AES_MAX_KEY_LEN]; + srtp_aes_expanded_key_t exp_key; + int key_len, len; + int verbose = 0; + srtp_err_status_t status; + + /* -v must be last if it's passed */ + if (argc > 0 && strncmp(argv[argc - 1], "-v", 2) == 0) { + /* we're in verbose mode */ + verbose = 1; + --argc; + } + + if (argc < 3 || argc > 4) { + /* we've been fed the wrong number of arguments - compain and exit */ + usage(argv[0]); + } + + if (argc == 4) { + /* we're being passed the ciphertext to check (in unit test mode) */ + expected_ciphertext = argv[3]; + if (strlen(expected_ciphertext) != 16 * 2) { + usage(argv[0]); + } + } + + /* read in key, checking length */ + if (strlen(argv[1]) > AES_MAX_KEY_LEN * 2) { + fprintf(stderr, "error: too many digits in key " + "(should be at most %d hexadecimal digits, found %u)\n", + AES_MAX_KEY_LEN * 2, (unsigned)strlen(argv[1])); + exit(1); + } + len = hex_string_to_octet_string((char *)key, argv[1], AES_MAX_KEY_LEN * 2); + /* check that hex string is the right length */ + if (len != 32 && len != 48 && len != 64) { + fprintf(stderr, "error: bad number of digits in key " + "(should be 32/48/64 hexadecimal digits, found %d)\n", + len); + exit(1); + } + key_len = len / 2; + + /* read in plaintext, checking length */ + if (strlen(argv[2]) > 16 * 2) { + fprintf(stderr, "error: too many digits in plaintext " + "(should be %d hexadecimal digits, found %u)\n", + 16 * 2, (unsigned)strlen(argv[2])); + exit(1); + } + len = hex_string_to_octet_string((char *)(&data), argv[2], 16 * 2); + /* check that hex string is the right length */ + if (len < 16 * 2) { + fprintf(stderr, "error: too few digits in plaintext " + "(should be %d hexadecimal digits, found %d)\n", + 16 * 2, len); + exit(1); + } + + if (verbose) { + /* print out plaintext */ + printf("plaintext:\t%s\n", + octet_string_hex_string((uint8_t *)&data, 16)); + } + + /* encrypt plaintext */ + status = srtp_aes_expand_encryption_key(key, key_len, &exp_key); + if (status) { + fprintf(stderr, "error: AES key expansion failed.\n"); + exit(1); + } + + srtp_aes_encrypt(&data, &exp_key); + + /* write ciphertext to output */ + if (verbose) { + printf("key:\t\t%s\n", octet_string_hex_string(key, key_len)); + printf("ciphertext:\t"); + } + + ciphertext = v128_hex_string(&data); + printf("%s\n", ciphertext); + + if (expected_ciphertext && strcmp(ciphertext, expected_ciphertext) != 0) { + fprintf(stderr, "error: calculated ciphertext %s does not match " + "expected ciphertext %s\n", + ciphertext, expected_ciphertext); + exit(1); + } + + return 0; +} diff --git a/third_party/libsrtp/src/crypto/test/cipher_driver.c b/third_party/libsrtp/src/crypto/test/cipher_driver.c new file mode 100644 index 0000000000..4fbcd95e39 --- /dev/null +++ b/third_party/libsrtp/src/crypto/test/cipher_driver.c @@ -0,0 +1,598 @@ +/* + * cipher_driver.c + * + * A driver for the generic cipher type + * + * David A. McGrew + * Cisco Systems, Inc. + */ + +/* + * + * Copyright (c) 2001-2017 Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> /* for printf() */ +#include "getopt_s.h" +#include "cipher.h" +#include "cipher_priv.h" +#include "datatypes.h" + +#define PRINT_DEBUG 0 + +void cipher_driver_test_throughput(srtp_cipher_t *c); + +srtp_err_status_t cipher_driver_self_test(srtp_cipher_type_t *ct); + +/* + * cipher_driver_test_buffering(ct) tests the cipher's output + * buffering for correctness by checking the consistency of succesive + * calls + */ + +srtp_err_status_t cipher_driver_test_buffering(srtp_cipher_t *c); + +/* + * functions for testing cipher cache thrash + */ +srtp_err_status_t cipher_driver_test_array_throughput(srtp_cipher_type_t *ct, + int klen, + int num_cipher); + +void cipher_array_test_throughput(srtp_cipher_t *ca[], int num_cipher); + +uint64_t cipher_array_bits_per_second(srtp_cipher_t *cipher_array[], + int num_cipher, + unsigned octets_in_buffer, + int num_trials); + +srtp_err_status_t cipher_array_delete(srtp_cipher_t *cipher_array[], + int num_cipher); + +srtp_err_status_t cipher_array_alloc_init(srtp_cipher_t ***cipher_array, + int num_ciphers, + srtp_cipher_type_t *ctype, + int klen); + +void usage(char *prog_name) +{ + printf("usage: %s [ -t | -v | -a ]\n", prog_name); + exit(255); +} + +void check_status(srtp_err_status_t s) +{ + if (s) { + printf("error (code %d)\n", s); + exit(s); + } + return; +} + +/* + * null_cipher and srtp_aes_icm are the cipher meta-objects + * defined in the files in crypto/cipher subdirectory. these are + * declared external so that we can use these cipher types here + */ + +extern srtp_cipher_type_t srtp_null_cipher; +extern srtp_cipher_type_t srtp_aes_icm_128; +extern srtp_cipher_type_t srtp_aes_icm_256; +#ifdef GCM +extern srtp_cipher_type_t srtp_aes_icm_192; +extern srtp_cipher_type_t srtp_aes_gcm_128; +extern srtp_cipher_type_t srtp_aes_gcm_256; +#endif + +int main(int argc, char *argv[]) +{ + srtp_cipher_t *c = NULL; + srtp_err_status_t status; + /* clang-format off */ + unsigned char test_key[48] = { + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, + 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, + 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, + 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, + 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, + }; + /* clang-format on */ + int q; + unsigned do_timing_test = 0; + unsigned do_validation = 0; + unsigned do_array_timing_test = 0; + + /* process input arguments */ + while (1) { + q = getopt_s(argc, argv, "tva"); + if (q == -1) + break; + switch (q) { + case 't': + do_timing_test = 1; + break; + case 'v': + do_validation = 1; + break; + case 'a': + do_array_timing_test = 1; + break; + default: + usage(argv[0]); + } + } + + printf("cipher test driver\n" + "David A. McGrew\n" + "Cisco Systems, Inc.\n"); + + if (!do_validation && !do_timing_test && !do_array_timing_test) + usage(argv[0]); + + /* arry timing (cache thrash) test */ + if (do_array_timing_test) { + int max_num_cipher = 1 << 16; /* number of ciphers in cipher_array */ + int num_cipher; + + for (num_cipher = 1; num_cipher < max_num_cipher; num_cipher *= 8) + cipher_driver_test_array_throughput(&srtp_null_cipher, 0, + num_cipher); + + for (num_cipher = 1; num_cipher < max_num_cipher; num_cipher *= 8) + cipher_driver_test_array_throughput( + &srtp_aes_icm_128, SRTP_AES_ICM_128_KEY_LEN_WSALT, num_cipher); + + for (num_cipher = 1; num_cipher < max_num_cipher; num_cipher *= 8) + cipher_driver_test_array_throughput( + &srtp_aes_icm_256, SRTP_AES_ICM_256_KEY_LEN_WSALT, num_cipher); + +#ifdef GCM + for (num_cipher = 1; num_cipher < max_num_cipher; num_cipher *= 8) + cipher_driver_test_array_throughput( + &srtp_aes_icm_192, SRTP_AES_ICM_192_KEY_LEN_WSALT, num_cipher); + + for (num_cipher = 1; num_cipher < max_num_cipher; num_cipher *= 8) { + cipher_driver_test_array_throughput( + &srtp_aes_gcm_128, SRTP_AES_GCM_128_KEY_LEN_WSALT, num_cipher); + } + + for (num_cipher = 1; num_cipher < max_num_cipher; num_cipher *= 8) { + cipher_driver_test_array_throughput( + &srtp_aes_gcm_256, SRTP_AES_GCM_256_KEY_LEN_WSALT, num_cipher); + } +#endif + } + + if (do_validation) { + cipher_driver_self_test(&srtp_null_cipher); + cipher_driver_self_test(&srtp_aes_icm_128); + cipher_driver_self_test(&srtp_aes_icm_256); +#ifdef GCM + cipher_driver_self_test(&srtp_aes_icm_192); + cipher_driver_self_test(&srtp_aes_gcm_128); + cipher_driver_self_test(&srtp_aes_gcm_256); +#endif + } + + /* do timing and/or buffer_test on srtp_null_cipher */ + status = srtp_cipher_type_alloc(&srtp_null_cipher, &c, 0, 0); + check_status(status); + + status = srtp_cipher_init(c, NULL); + check_status(status); + + if (do_timing_test) + cipher_driver_test_throughput(c); + if (do_validation) { + status = cipher_driver_test_buffering(c); + check_status(status); + } + status = srtp_cipher_dealloc(c); + check_status(status); + + /* run the throughput test on the aes_icm cipher (128-bit key) */ + status = srtp_cipher_type_alloc(&srtp_aes_icm_128, &c, + SRTP_AES_ICM_128_KEY_LEN_WSALT, 0); + if (status) { + fprintf(stderr, "error: can't allocate cipher\n"); + exit(status); + } + + status = srtp_cipher_init(c, test_key); + check_status(status); + + if (do_timing_test) + cipher_driver_test_throughput(c); + + if (do_validation) { + status = cipher_driver_test_buffering(c); + check_status(status); + } + + status = srtp_cipher_dealloc(c); + check_status(status); + + /* repeat the tests with 256-bit keys */ + status = srtp_cipher_type_alloc(&srtp_aes_icm_256, &c, + SRTP_AES_ICM_256_KEY_LEN_WSALT, 0); + if (status) { + fprintf(stderr, "error: can't allocate cipher\n"); + exit(status); + } + + status = srtp_cipher_init(c, test_key); + check_status(status); + + if (do_timing_test) + cipher_driver_test_throughput(c); + + if (do_validation) { + status = cipher_driver_test_buffering(c); + check_status(status); + } + + status = srtp_cipher_dealloc(c); + check_status(status); + +#ifdef GCM + /* run the throughput test on the aes_gcm_128 cipher */ + status = srtp_cipher_type_alloc(&srtp_aes_gcm_128, &c, + SRTP_AES_GCM_128_KEY_LEN_WSALT, 8); + if (status) { + fprintf(stderr, "error: can't allocate GCM 128 cipher\n"); + exit(status); + } + status = srtp_cipher_init(c, test_key); + check_status(status); + if (do_timing_test) { + cipher_driver_test_throughput(c); + } + + // GCM ciphers don't do buffering; they're "one shot" + + status = srtp_cipher_dealloc(c); + check_status(status); + + /* run the throughput test on the aes_gcm_256 cipher */ + status = srtp_cipher_type_alloc(&srtp_aes_gcm_256, &c, + SRTP_AES_GCM_256_KEY_LEN_WSALT, 16); + if (status) { + fprintf(stderr, "error: can't allocate GCM 256 cipher\n"); + exit(status); + } + status = srtp_cipher_init(c, test_key); + check_status(status); + if (do_timing_test) { + cipher_driver_test_throughput(c); + } + + // GCM ciphers don't do buffering; they're "one shot" + + status = srtp_cipher_dealloc(c); + check_status(status); +#endif + + return 0; +} + +void cipher_driver_test_throughput(srtp_cipher_t *c) +{ + int i; + int min_enc_len = 32; + int max_enc_len = 2048; /* should be a power of two */ + int num_trials = 1000000; + + printf("timing %s throughput, key length %d:\n", c->type->description, + c->key_len); + fflush(stdout); + for (i = min_enc_len; i <= max_enc_len; i = i * 2) + printf("msg len: %d\tgigabits per second: %f\n", i, + srtp_cipher_bits_per_second(c, i, num_trials) / 1e9); +} + +srtp_err_status_t cipher_driver_self_test(srtp_cipher_type_t *ct) +{ + srtp_err_status_t status; + + printf("running cipher self-test for %s...", ct->description); + status = srtp_cipher_type_self_test(ct); + if (status) { + printf("failed with error code %d\n", status); + exit(status); + } + printf("passed\n"); + + return srtp_err_status_ok; +} + +/* + * cipher_driver_test_buffering(ct) tests the cipher's output + * buffering for correctness by checking the consistency of succesive + * calls + */ + +#define INITIAL_BUFLEN 1024 +srtp_err_status_t cipher_driver_test_buffering(srtp_cipher_t *c) +{ + int i, j, num_trials = 1000; + unsigned len, buflen = INITIAL_BUFLEN; + uint8_t buffer0[INITIAL_BUFLEN], buffer1[INITIAL_BUFLEN], *current, *end; + uint8_t idx[16] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x12, 0x34 }; + srtp_err_status_t status; + + printf("testing output buffering for cipher %s...", c->type->description); + + for (i = 0; i < num_trials; i++) { + /* set buffers to zero */ + for (j = 0; j < (int)buflen; j++) { + buffer0[j] = buffer1[j] = 0; + } + + /* initialize cipher */ + status = srtp_cipher_set_iv(c, (uint8_t *)idx, srtp_direction_encrypt); + if (status) + return status; + + /* generate 'reference' value by encrypting all at once */ + status = srtp_cipher_encrypt(c, buffer0, &buflen); + if (status) + return status; + + /* re-initialize cipher */ + status = srtp_cipher_set_iv(c, (uint8_t *)idx, srtp_direction_encrypt); + if (status) + return status; + + /* now loop over short lengths until buffer1 is encrypted */ + current = buffer1; + end = buffer1 + buflen; + while (current < end) { + /* choose a short length */ + len = srtp_cipher_rand_u32_for_tests() & 0x01f; + + /* make sure that len doesn't cause us to overreach the buffer */ + if (current + len > end) + len = end - current; + + status = srtp_cipher_encrypt(c, current, &len); + if (status) + return status; + + /* advance pointer into buffer1 to reflect encryption */ + current += len; + + /* if buffer1 is all encrypted, break out of loop */ + if (current == end) + break; + } + + /* compare buffers */ + for (j = 0; j < (int)buflen; j++) { + if (buffer0[j] != buffer1[j]) { +#if PRINT_DEBUG + printf("test case %d failed at byte %d\n", i, j); + printf("computed: %s\n", + octet_string_hex_string(buffer1, buflen)); + printf("expected: %s\n", + octet_string_hex_string(buffer0, buflen)); +#endif + return srtp_err_status_algo_fail; + } + } + } + + printf("passed\n"); + + return srtp_err_status_ok; +} + +/* + * The function cipher_test_throughput_array() tests the effect of CPU + * cache thrash on cipher throughput. + * + * cipher_array_alloc_init(ctype, array, num_ciphers) creates an array + * of srtp_cipher_t of type ctype + */ + +srtp_err_status_t cipher_array_alloc_init(srtp_cipher_t ***ca, + int num_ciphers, + srtp_cipher_type_t *ctype, + int klen) +{ + int i, j; + srtp_err_status_t status; + uint8_t *key; + srtp_cipher_t **cipher_array; + /* pad klen allocation, to handle aes_icm reading 16 bytes for the + 14-byte salt */ + int klen_pad = ((klen + 15) >> 4) << 4; + + /* allocate array of pointers to ciphers */ + cipher_array = (srtp_cipher_t **)srtp_crypto_alloc(sizeof(srtp_cipher_t *) * + num_ciphers); + if (cipher_array == NULL) + return srtp_err_status_alloc_fail; + + /* set ca to location of cipher_array */ + *ca = cipher_array; + + /* allocate key */ + key = srtp_crypto_alloc(klen_pad); + if (key == NULL) { + srtp_crypto_free(cipher_array); + return srtp_err_status_alloc_fail; + } + + /* allocate and initialize an array of ciphers */ + for (i = 0; i < num_ciphers; i++) { + /* allocate cipher */ + status = srtp_cipher_type_alloc(ctype, cipher_array, klen, 16); + if (status) + return status; + + /* generate random key and initialize cipher */ + srtp_cipher_rand_for_tests(key, klen); + for (j = klen; j < klen_pad; j++) + key[j] = 0; + status = srtp_cipher_init(*cipher_array, key); + if (status) + return status; + + /* printf("%dth cipher is at %p\n", i, *cipher_array); */ + /* printf("%dth cipher description: %s\n", i, */ + /* (*cipher_array)->type->description); */ + + /* advance cipher array pointer */ + cipher_array++; + } + + srtp_crypto_free(key); + + return srtp_err_status_ok; +} + +srtp_err_status_t cipher_array_delete(srtp_cipher_t *cipher_array[], + int num_cipher) +{ + int i; + + for (i = 0; i < num_cipher; i++) { + srtp_cipher_dealloc(cipher_array[i]); + } + + srtp_crypto_free(cipher_array); + + return srtp_err_status_ok; +} + +/* + * cipher_array_bits_per_second(c, l, t) computes (an estimate of) the + * number of bits that a cipher implementation can encrypt in a second + * when distinct keys are used to encrypt distinct messages + * + * c is a cipher (which MUST be allocated an initialized already), l + * is the length in octets of the test data to be encrypted, and t is + * the number of trials + * + * if an error is encountered, the value 0 is returned + */ + +uint64_t cipher_array_bits_per_second(srtp_cipher_t *cipher_array[], + int num_cipher, + unsigned octets_in_buffer, + int num_trials) +{ + int i; + v128_t nonce; + clock_t timer; + unsigned char *enc_buf; + int cipher_index = srtp_cipher_rand_u32_for_tests() % num_cipher; + + /* Over-alloc, for NIST CBC padding */ + enc_buf = srtp_crypto_alloc(octets_in_buffer + 17); + if (enc_buf == NULL) + return 0; /* indicate bad parameters by returning null */ + + /* time repeated trials */ + v128_set_to_zero(&nonce); + timer = clock(); + for (i = 0; i < num_trials; i++, nonce.v32[3] = i) { + /* length parameter to srtp_cipher_encrypt is in/out -- out is total, + * padded + * length -- so reset it each time. */ + unsigned octets_to_encrypt = octets_in_buffer; + + /* encrypt buffer with cipher */ + srtp_cipher_set_iv(cipher_array[cipher_index], (uint8_t *)&nonce, + srtp_direction_encrypt); + srtp_cipher_encrypt(cipher_array[cipher_index], enc_buf, + &octets_to_encrypt); + + /* choose a cipher at random from the array*/ + cipher_index = (*((uint32_t *)enc_buf)) % num_cipher; + } + timer = clock() - timer; + + srtp_crypto_free(enc_buf); + + if (timer == 0) { + /* Too fast! */ + return 0; + } + + return (uint64_t)CLOCKS_PER_SEC * num_trials * 8 * octets_in_buffer / timer; +} + +void cipher_array_test_throughput(srtp_cipher_t *ca[], int num_cipher) +{ + int i; + int min_enc_len = 16; + int max_enc_len = 2048; /* should be a power of two */ + int num_trials = 1000000; + + printf("timing %s throughput with key length %d, array size %d:\n", + (ca[0])->type->description, (ca[0])->key_len, num_cipher); + fflush(stdout); + for (i = min_enc_len; i <= max_enc_len; i = i * 4) + printf("msg len: %d\tgigabits per second: %f\n", i, + cipher_array_bits_per_second(ca, num_cipher, i, num_trials) / + 1e9); +} + +srtp_err_status_t cipher_driver_test_array_throughput(srtp_cipher_type_t *ct, + int klen, + int num_cipher) +{ + srtp_cipher_t **ca = NULL; + srtp_err_status_t status; + + status = cipher_array_alloc_init(&ca, num_cipher, ct, klen); + if (status) { + printf("error: cipher_array_alloc_init() failed with error code %d\n", + status); + return status; + } + + cipher_array_test_throughput(ca, num_cipher); + + cipher_array_delete(ca, num_cipher); + + return srtp_err_status_ok; +} diff --git a/third_party/libsrtp/src/crypto/test/datatypes_driver.c b/third_party/libsrtp/src/crypto/test/datatypes_driver.c new file mode 100644 index 0000000000..db1be7f668 --- /dev/null +++ b/third_party/libsrtp/src/crypto/test/datatypes_driver.c @@ -0,0 +1,222 @@ +/* + * datatypes_driver.c + * + * a test driver for crypto/math datatypes + * + * David A. McGrew + * Cisco Systems, Inc. + */ + +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> /* for printf() */ +#include <string.h> /* for strlen() */ +#include "datatypes.h" +#include "util.h" + +void byte_order(void); + +void test_hex_string_funcs(void); + +void print_string(char *s); + +void test_bswap(void); + +void test_set_to_zero(void); + +int main(void) +{ + /* + * this program includes various and sundry tests for fundamental + * datatypes. it's a grab-bag of throwaway code, retained only in + * case of future problems + */ + + int i, j; + v128_t x; + char *r = "The Moving Finger writes; and, having writ,\n" + "Moves on: nor all thy Piety nor Wit\n" + "Shall lure it back to cancel half a Line,\n" + "Nor all thy Tears wash out a Word of it."; + char *s = "incomplet"; + + print_string(r); + print_string(s); + + byte_order(); + test_hex_string_funcs(); + + for (j = 0; j < 128; j++) { + v128_set_to_zero(&x); + /* x.v32[0] = (1 << j); */ + v128_set_bit(&x, j); + printf("%s\n", v128_bit_string(&x)); + v128_clear_bit(&x, j); + printf("%s\n", v128_bit_string(&x)); + } + + printf("----------------------------------------------\n"); + v128_set_to_zero(&x); + for (i = 0; i < 128; i++) { + v128_set_bit(&x, i); + } + printf("%s\n", v128_bit_string(&x)); + + printf("----------------------------------------------\n"); + v128_set_to_zero(&x); + v128_set_bit(&x, 127); + for (i = 0; i < 128; i++) { + printf("%s\n", v128_bit_string(&x)); + v128_left_shift(&x, 1); + } + printf("----------------------------------------------\n"); + for (i = 0; i < 128; i++) { + v128_set_to_zero(&x); + v128_set_bit(&x, 127); + v128_left_shift(&x, i); + printf("%s\n", v128_bit_string(&x)); + } + printf("----------------------------------------------\n"); + v128_set_to_zero(&x); + for (i = 0; i < 128; i += 2) { + v128_set_bit(&x, i); + } + printf("bit_string: { %s }\n", v128_bit_string(&x)); + printf("get_bit: { "); + for (i = 0; i < 128; i++) { + if (v128_get_bit(&x, i) == 1) + printf("1"); + else + printf("0"); + } + printf(" } \n"); + + test_bswap(); + test_set_to_zero(); + + return 0; +} + +/* byte_order() prints out byte ordering of datatypes */ + +void byte_order(void) +{ + int i; + v128_t e; + + printf("byte ordering of crypto/math datatypes:\n"); + for (i = 0; i < sizeof(e); i++) + e.v8[i] = i; + printf("v128_t: %s\n", v128_hex_string(&e)); +} + +void test_hex_string_funcs(void) +{ + char hex1[] = "abadcafe"; + char hex2[] = "0123456789abcdefqqqqq"; + char raw[10]; + int len; + + len = hex_string_to_octet_string(raw, hex1, strlen(hex1)); + printf("computed length: %d\tstring: %s\n", len, + octet_string_hex_string(raw, len / 2)); + printf("expected length: %u\tstring: %s\n", (unsigned)strlen(hex1), hex1); + + len = hex_string_to_octet_string(raw, hex2, strlen(hex2)); + printf("computed length: %d\tstring: %s\n", len, + octet_string_hex_string(raw, len / 2)); + printf("expected length: %d\tstring: %s\n", 16, "0123456789abcdef"); +} + +void print_string(char *s) +{ + size_t i; + printf("%s\n", s); + printf("strlen(s) = %u\n", (unsigned)strlen(s)); + printf("{ "); + for (i = 0; i < strlen(s); i++) { + printf("0x%x, ", s[i]); + if (((i + 1) % 8) == 0) + printf("\n "); + } + printf("}\n"); +} + +void test_bswap(void) +{ + uint32_t x = 0x11223344; + uint64_t y = 0x1122334455667788LL; + + printf("before: %0x\nafter: %0x\n", x, (unsigned int)be32_to_cpu(x)); + printf("before: %0llx\nafter: %0llx\n", (unsigned long long)y, + (unsigned long long)be64_to_cpu(y)); + + y = 1234; + + printf("1234: %0llx\n", (unsigned long long)y); + printf("as octet string: %s\n", octet_string_hex_string((uint8_t *)&y, 8)); + y = be64_to_cpu(y); + printf("bswapped octet string: %s\n", + octet_string_hex_string((uint8_t *)&y, 8)); +} + +void test_set_to_zero(void) +{ +#define BUFFER_SIZE (16) + uint8_t buffer[BUFFER_SIZE]; + size_t i; + + for (i = 0; i < BUFFER_SIZE; i++) { + buffer[i] = i & 0xff; + } + printf("Buffer before: %s\n", octet_string_hex_string(buffer, BUFFER_SIZE)); + octet_string_set_to_zero(buffer, BUFFER_SIZE); + printf("Buffer after: %s\n", octet_string_hex_string(buffer, BUFFER_SIZE)); + for (i = 0; i < BUFFER_SIZE; i++) { + if (buffer[i]) { + fprintf(stderr, + "Buffer contents not zero at position %zu (is %d)\n", i, + buffer[i]); + abort(); + } + } +#undef BUFFER_SIZE +} diff --git a/third_party/libsrtp/src/crypto/test/env.c b/third_party/libsrtp/src/crypto/test/env.c new file mode 100644 index 0000000000..8c3f4edfac --- /dev/null +++ b/third_party/libsrtp/src/crypto/test/env.c @@ -0,0 +1,89 @@ +/* + * env.c + * + * prints out a brief report on the build environment + * + * David McGrew + * Cisco Systems, Inc. + */ +/* + * + * Copyright (c) 2001-2017 Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#include <stdio.h> +#include <string.h> /* for srtcmp() */ +#include "config.h" + +int main(void) +{ + int err_count = 0; + +#ifdef WORDS_BIGENDIAN + printf("CPU set to big-endian\t\t\t(WORDS_BIGENDIAN == 1)\n"); +#else + printf("CPU set to little-endian\t\t(WORDS_BIGENDIAN == 0)\n"); +#endif + +#ifdef CPU_RISC + printf("CPU set to RISC\t\t\t\t(CPU_RISC == 1)\n"); +#elif defined(CPU_CISC) + printf("CPU set to CISC\t\t\t\t(CPU_CISC == 1)\n"); +#else + printf( + "CPU set to an unknown type, probably due to a configuration error\n"); + err_count++; +#endif + +#ifdef CPU_ALTIVEC + printf("CPU set to ALTIVEC\t\t\t\t(CPU_ALTIVEC == 0)\n"); +#endif + +#ifndef NO_64BIT_MATH + printf("using native 64-bit type\t\t(NO_64_BIT_MATH == 0)\n"); +#else + printf("using built-in 64-bit math\t\t(NO_64_BIT_MATH == 1)\n"); +#endif + +#ifdef ERR_REPORTING_STDOUT + printf("using stdout for error reporting\t(ERR_REPORTING_STDOUT == 1)\n"); +#endif + + if (err_count) + printf("warning: configuration is probably in error " + "(found %d problems)\n", + err_count); + + return err_count; +} diff --git a/third_party/libsrtp/src/crypto/test/kernel_driver.c b/third_party/libsrtp/src/crypto/test/kernel_driver.c new file mode 100644 index 0000000000..929a2470af --- /dev/null +++ b/third_party/libsrtp/src/crypto/test/kernel_driver.c @@ -0,0 +1,115 @@ +/* + * kernel_driver.c + * + * a test driver for the crypto_kernel + * + * David A. McGrew + * Cisco Systems, Inc. + */ +/* + * + * Copyright(c) 2001-2017 Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> /* for printf() */ +#include "getopt_s.h" +#include "crypto_kernel.h" + +void usage(char *prog_name) +{ + printf("usage: %s [ -v ][ -d debug_module ]*\n", prog_name); + exit(255); +} + +int main(int argc, char *argv[]) +{ + int q; + int do_validation = 0; + srtp_err_status_t status; + + if (argc == 1) + usage(argv[0]); + + /* initialize kernel - we need to do this before anything else */ + status = srtp_crypto_kernel_init(); + if (status) { + printf("error: srtp_crypto_kernel init failed\n"); + exit(1); + } + printf("srtp_crypto_kernel successfully initalized\n"); + + /* process input arguments */ + while (1) { + q = getopt_s(argc, argv, "vd:"); + if (q == -1) + break; + switch (q) { + case 'v': + do_validation = 1; + break; + case 'd': + status = srtp_crypto_kernel_set_debug_module(optarg_s, 1); + if (status) { + printf("error: set debug module (%s) failed\n", optarg_s); + exit(1); + } + break; + default: + usage(argv[0]); + } + } + + if (do_validation) { + printf("checking srtp_crypto_kernel status...\n"); + status = srtp_crypto_kernel_status(); + if (status) { + printf("failed\n"); + exit(1); + } + printf("srtp_crypto_kernel passed self-tests\n"); + } + + status = srtp_crypto_kernel_shutdown(); + if (status) { + printf("error: srtp_crypto_kernel shutdown failed\n"); + exit(1); + } + printf("srtp_crypto_kernel successfully shut down\n"); + + return 0; +} diff --git a/third_party/libsrtp/src/crypto/test/meson.build b/third_party/libsrtp/src/crypto/test/meson.build new file mode 100644 index 0000000000..533431c54e --- /dev/null +++ b/third_party/libsrtp/src/crypto/test/meson.build @@ -0,0 +1,41 @@ +# crypto test suite + +test_apps = [ + 'cipher_driver', + 'datatypes_driver', + 'kernel_driver', + 'env', +] + +if not use_openssl and not use_nss + test_apps += ['sha1_driver'] +endif + +foreach test_name : test_apps + test_exe = executable(test_name, + '@0@.c'.format(test_name), '../../test/getopt_s.c', '../../test/util.c', + include_directories: [config_incs, crypto_incs, srtp2_incs, test_incs], + dependencies: [srtp2_deps, syslibs], + link_with: libsrtp2_for_tests) + test(test_name, test_exe, args: ['-v']) +endforeach + +if not use_openssl and not use_nss + test_exe = executable('aes_calc', + 'aes_calc.c', '../../test/getopt_s.c', '../../test/util.c', + include_directories: [config_incs, crypto_incs, srtp2_incs, test_incs], + dependencies: [srtp2_deps, syslibs], + link_with: libsrtp2_for_tests) + + # data values used to test the aes_calc application for AES-128 + k128 = '000102030405060708090a0b0c0d0e0f' + p128 = '00112233445566778899aabbccddeeff' + c128 = '69c4e0d86a7b0430d8cdb78070b4c55a' + test('aes_calc_128', test_exe, args: [k128, p128, c128]) + + # data values used to test the aes_calc application for AES-256 + k256 = '000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f' + p256 = '00112233445566778899aabbccddeeff' + c256 = '8ea2b7ca516745bfeafc49904b496089' + test('aes_calc_256', test_exe, args: [k256, p256, c256]) +endif diff --git a/third_party/libsrtp/src/crypto/test/sha1_driver.c b/third_party/libsrtp/src/crypto/test/sha1_driver.c new file mode 100644 index 0000000000..c64b000f81 --- /dev/null +++ b/third_party/libsrtp/src/crypto/test/sha1_driver.c @@ -0,0 +1,387 @@ +/* + * sha1_driver.c + * + * a test driver for SHA-1 + * + * David A. McGrew + * Cisco Systems, Inc. + */ + +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#include <string.h> +#include "sha1.h" +#include "util.h" + +#define SHA_PASS 0 +#define SHA_FAIL 1 + +#define MAX_HASH_DATA_LEN 1024 +#define MAX_HASH_OUT_LEN 20 + +typedef struct hash_test_case_t { + unsigned data_len; /* number of octets in data */ + unsigned hash_len; /* number of octets output by hash */ + uint8_t data[MAX_HASH_DATA_LEN]; /* message data */ + uint8_t hash[MAX_HASH_OUT_LEN]; /* expected hash output */ + struct hash_test_case_t *next_test_case; +} hash_test_case_t; + +hash_test_case_t *sha1_test_case_list; + +srtp_err_status_t hash_test_case_add(hash_test_case_t **list_ptr, + char *hex_data, + unsigned data_len, + char *hex_hash, + unsigned hash_len) +{ + hash_test_case_t *list_head = *list_ptr; + hash_test_case_t *test_case; + unsigned tmp_len; + + test_case = malloc(sizeof(hash_test_case_t)); + if (test_case == NULL) + return srtp_err_status_alloc_fail; + + tmp_len = hex_string_to_octet_string((char *)test_case->data, hex_data, + data_len * 2); + if (tmp_len != data_len * 2) { + free(test_case); + return srtp_err_status_parse_err; + } + + tmp_len = hex_string_to_octet_string((char *)test_case->hash, hex_hash, + hash_len * 2); + if (tmp_len != hash_len * 2) { + free(test_case); + return srtp_err_status_parse_err; + } + + test_case->data_len = data_len; + test_case->hash_len = hash_len; + + /* add the new test case to the head of the list */ + test_case->next_test_case = list_head; + *list_ptr = test_case; + + return srtp_err_status_ok; +} + +srtp_err_status_t sha1_test_case_validate(const hash_test_case_t *test_case) +{ + srtp_sha1_ctx_t ctx; + uint32_t hash_value[5]; + + if (test_case == NULL) + return srtp_err_status_bad_param; + + if (test_case->hash_len != 20) + return srtp_err_status_bad_param; + if (test_case->data_len > MAX_HASH_DATA_LEN) + return srtp_err_status_bad_param; + + srtp_sha1_init(&ctx); + srtp_sha1_update(&ctx, test_case->data, test_case->data_len); + srtp_sha1_final(&ctx, hash_value); + if (0 == memcmp(test_case->hash, hash_value, 20)) { +#if VERBOSE + printf("PASSED: reference value: %s\n", + octet_string_hex_string((const uint8_t *)test_case->hash, 20)); + printf("PASSED: computed value: %s\n", + octet_string_hex_string((const uint8_t *)hash_value, 20)); +#endif + return srtp_err_status_ok; + } + + printf("reference value: %s\n", + octet_string_hex_string((const uint8_t *)test_case->hash, 20)); + printf("computed value: %s\n", + octet_string_hex_string((const uint8_t *)hash_value, 20)); + + return srtp_err_status_algo_fail; +} + +struct hex_sha1_test_case_t { + unsigned bit_len; + char hex_data[MAX_HASH_DATA_LEN * 2]; + char hex_hash[40]; +}; + +srtp_err_status_t sha1_add_test_cases(void) +{ + int i; + srtp_err_status_t err; + + /* + * these test cases are taken from the "SHA-1 Sample Vectors" + * provided by NIST at http://csrc.nist.gov/cryptval/shs.html + */ + + struct hex_sha1_test_case_t tc[] = { + { 0, "", "da39a3ee5e6b4b0d3255bfef95601890afd80709" }, + { 8, "a8", "99f2aa95e36f95c2acb0eaf23998f030638f3f15" }, + { 16, "3000", "f944dcd635f9801f7ac90a407fbc479964dec024" }, + { 24, "42749e", "a444319e9b6cc1e8464c511ec0969c37d6bb2619" }, + { 32, "9fc3fe08", "16a0ff84fcc156fd5d3ca3a744f20a232d172253" }, + { 40, "b5c1c6f1af", "fec9deebfcdedaf66dda525e1be43597a73a1f93" }, + { 48, "e47571e5022e", "8ce051181f0ed5e9d0c498f6bc4caf448d20deb5" }, + { 56, "3e1b28839fb758", "67da53837d89e03bf652ef09c369a3415937cfd3" }, + { 64, "a81350cbb224cb90", "305e4ff9888ad855a78573cddf4c5640cce7e946" }, + { 72, "c243d167923dec3ce1", + "5902b77b3265f023f9bbc396ba1a93fa3509bde7" }, + { 80, "50ac18c59d6a37a29bf4", + "fcade5f5d156bf6f9af97bdfa9c19bccfb4ff6ab" }, + { 88, "98e2b611ad3b1cccf634f6", + "1d20fbe00533c10e3cbd6b27088a5de0c632c4b5" }, + { 96, "73fe9afb68e1e8712e5d4eec", + "7e1b7e0f7a8f3455a9c03e9580fd63ae205a2d93" }, + { 104, "9e701ed7d412a9226a2a130e66", + "706f0677146307b20bb0e8d6311e329966884d13" }, + { 112, "6d3ee90413b0a7cbf69e5e6144ca", + "a7241a703aaf0d53fe142f86bf2e849251fa8dff" }, + { 120, "fae24d56514efcb530fd4802f5e71f", + "400f53546916d33ad01a5e6df66822dfbdc4e9e6" }, + { 128, "c5a22dd6eda3fe2bdc4ddb3ce6b35fd1", + "fac8ab93c1ae6c16f0311872b984f729dc928ccd" }, + { 136, "d98cded2adabf08fda356445c781802d95", + "fba6d750c18da58f6e2aab10112b9a5ef3301b3b" }, + { 144, "bcc6d7087a84f00103ccb32e5f5487a751a2", + "29d27c2d44c205c8107f0351b05753ac708226b6" }, + { 152, "36ecacb1055434190dbbc556c48bafcb0feb0d", + "b971bfc1ebd6f359e8d74cb7ecfe7f898d0ba845" }, + { 160, "5ff9edb69e8f6bbd498eb4537580b7fba7ad31d0", + "96d08c430094b9fcc164ad2fb6f72d0a24268f68" }, + { 168, "c95b441d8270822a46a798fae5defcf7b26abace36", + "a287ea752a593d5209e287881a09c49fa3f0beb1" }, + { 176, "83104c1d8a55b28f906f1b72cb53f68cbb097b44f860", + "a06c713779cbd88519ed4a585ac0cb8a5e9d612b" }, + { 184, "755175528d55c39c56493d697b790f099a5ce741f7754b", + "bff7d52c13a3688132a1d407b1ab40f5b5ace298" }, + { 192, "088fc38128bbdb9fd7d65228b3184b3faac6c8715f07272f", + "c7566b91d7b6f56bdfcaa9781a7b6841aacb17e9" }, + { 200, "a4a586eb9245a6c87e3adf1009ac8a49f46c07e14185016895", + "ffa30c0b5c550ea4b1e34f8a60ec9295a1e06ac1" }, + { 208, "8e7c555270c006092c2a3189e2a526b873e2e269f0fb28245256", + "29e66ed23e914351e872aa761df6e4f1a07f4b81" }, + { 216, "a5f3bfa6bb0ba3b59f6b9cbdef8a558ec565e8aa3121f405e7f2f0", + "b28cf5e5b806a01491d41f69bd9248765c5dc292" }, + { 224, "589054f0d2bd3c2c85b466bfd8ce18e6ec3e0b87d944cd093ba36469", + "60224fb72c46069652cd78bcd08029ef64da62f3" }, + { 232, "a0abb12083b5bbc78128601bf1cbdbc0fdf4b862b24d899953d8da0ff3", + "b72c4a86f72608f24c05f3b9088ef92fba431df7" }, + { 240, "82143f4cea6fadbf998e128a8811dc75301cf1db4f079501ea568da68eeb", + "73779ad5d6b71b9b8328ef7220ff12eb167076ac" }, + { 248, "9f1231dd6df1ff7bc0b0d4f989d048672683ce35d956d2f57913046267e6f3", + "a09671d4452d7cf50015c914a1e31973d20cc1a0" }, + { 256, + "041c512b5eed791f80d3282f3a28df263bb1df95e1239a7650e5670fc2187919", + "e88cdcd233d99184a6fd260b8fca1b7f7687aee0" }, + { 264, + "17e81f6ae8c2e5579d69dafa6e070e7111461552d314b691e7a3e7a4feb3fae418", + "010def22850deb1168d525e8c84c28116cb8a269" }, + { 272, "d15976b23a1d712ad28fad04d805f572026b54dd64961fda94d5355a0cc9862" + "0cf77", + "aeaa40ba1717ed5439b1e6ea901b294ba500f9ad" }, + { 280, "09fce4d434f6bd32a44e04b848ff50ec9f642a8a85b37a264dc73f130f22838" + "443328f", + "c6433791238795e34f080a5f1f1723f065463ca0" }, + { 288, "f17af27d776ec82a257d8d46d2b46b639462c56984cc1be9c1222eadb8b2659" + "4a25c709d", + "e21e22b89c1bb944a32932e6b2a2f20d491982c3" }, + { 296, "b13ce635d6f8758143ffb114f2f601cb20b6276951416a2f94fbf4ad081779d" + "79f4f195b22", + "575323a9661f5d28387964d2ba6ab92c17d05a8a" }, + { 304, "5498793f60916ff1c918dde572cdea76da8629ba4ead6d065de3dfb48de94d2" + "34cc1c5002910", + "feb44494af72f245bfe68e86c4d7986d57c11db7" }, + { 312, "498a1e0b39fa49582ae688cd715c86fbaf8a81b8b11b4d1594c49c902d197c8" + "ba8a621fd6e3be5", + "cff2290b3648ba2831b98dde436a72f9ebf51eee" }, + { 320, "3a36ae71521f9af628b3e34dcb0d4513f84c78ee49f10416a98857150b8b15c" + "b5c83afb4b570376e", + "9b4efe9d27b965905b0c3dab67b8d7c9ebacd56c" }, + { 328, "dcc76b40ae0ea3ba253e92ac50fcde791662c5b6c948538cffc2d95e9de99ca" + "c34dfca38910db2678f", + "afedb0ff156205bcd831cbdbda43db8b0588c113" }, + { 336, "5b5ec6ec4fd3ad9c4906f65c747fd4233c11a1736b6b228b92e90cddabb0c7c" + "2fcf9716d3fad261dff33", + "8deb1e858f88293a5e5e4d521a34b2a4efa70fc4" }, + { 344, "df48a37b29b1d6de4e94717d60cdb4293fcf170bba388bddf7a9035a15d433f" + "20fd697c3e4c8b8c5f590ab", + "95cbdac0f74afa69cebd0e5c7defbc6faf0cbeaf" }, + { 352, "1f179b3b82250a65e1b0aee949e218e2f45c7a8dbfd6ba08de05c55acfc226b" + "48c68d7f7057e5675cd96fcfc", + "f0307bcb92842e5ae0cd4f4f14f3df7f877fbef2" }, + { 360, "ee3d72da3a44d971578972a8e6780ce64941267e0f7d0179b214fa97855e179" + "0e888e09fbe3a70412176cb3b54", + "7b13bb0dbf14964bd63b133ac85e22100542ef55" }, + { 368, "d4d4c7843d312b30f610b3682254c8be96d5f6684503f8fbfbcd15774fc1b08" + "4d3741afb8d24aaa8ab9c104f7258", + "c314d2b6cf439be678d2a74e890d96cfac1c02ed" }, + { 376, "32c094944f5936a190a0877fb9178a7bf60ceae36fd530671c5b38c5dbd5e6a" + "6c0d615c2ac8ad04b213cc589541cf6", + "4d0be361e410b47a9d67d8ce0bb6a8e01c53c078" }, + { 384, "e5d3180c14bf27a5409fa12b104a8fd7e9639609bfde6ee82bbf9648be2546d" + "29688a65e2e3f3da47a45ac14343c9c02", + "e5353431ffae097f675cbf498869f6fbb6e1c9f2" }, + { 392, "e7b6e4b69f724327e41e1188a37f4fe38b1dba19cbf5a7311d6e32f1038e97a" + "b506ee05aebebc1eed09fc0e357109818b9", + "b8720a7068a085c018ab18961de2765aa6cd9ac4" }, + { 400, "bc880cb83b8ac68ef2fedc2da95e7677ce2aa18b0e2d8b322701f67af7d5e7a" + "0d96e9e33326ccb7747cfff0852b961bfd475", + "b0732181568543ba85f2b6da602b4b065d9931aa" }, + { 408, "235ea9c2ba7af25400f2e98a47a291b0bccdaad63faa2475721fda5510cc7da" + "d814bce8dabb611790a6abe56030b798b75c944", + "9c22674cf3222c3ba921672694aafee4ce67b96b" }, + { 416, "07e3e29fed63104b8410f323b975fd9fba53f636af8c4e68a53fb202ca35dd9" + "ee07cb169ec5186292e44c27e5696a967f5e67709", + "d128335f4cecca9066cdae08958ce656ff0b4cfc" }, + { 424, "65d2a1dd60a517eb27bfbf530cf6a5458f9d5f4730058bd9814379547f34241" + "822bf67e6335a6d8b5ed06abf8841884c636a25733f", + "0b67c57ac578de88a2ae055caeaec8bb9b0085a0" }, + { 432, "dcc86b3bd461615bab739d8daafac231c0f462e819ad29f9f14058f3ab5b759" + "41d4241ea2f17ebb8a458831b37a9b16dead4a76a9b0e", + "c766f912a89d4ccda88e0cce6a713ef5f178b596" }, + { 440, "4627d54f0568dc126b62a8c35fb46a9ac5024400f2995e51635636e1afc4373" + "dbb848eb32df23914230560b82477e9c3572647a7f2bb92", + "9aa3925a9dcb177b15ccff9b78e70cf344858779" }, + { 448, "ba531affd4381168ef24d8b275a84d9254c7f5cc55fded53aa8024b2c5c5c8a" + "a7146fe1d1b83d62b70467e9a2e2cb67b3361830adbab28d7", + "4811fa30042fc076acf37c8e2274d025307e5943" }, + { 456, "8764dcbcf89dcf4282eb644e3d568bdccb4b13508bfa7bfe0ffc05efd1390be" + "22109969262992d377691eb4f77f3d59ea8466a74abf57b2ef4", + "6743018450c9730761ee2b130df9b91c1e118150" }, + { 464, "497d9df9ddb554f3d17870b1a31986c1be277bc44feff713544217a9f579623" + "d18b5ffae306c25a45521d2759a72c0459b58957255ab592f3be4", + "71ad4a19d37d92a5e6ef3694ddbeb5aa61ada645" }, + { 472, "72c3c2e065aefa8d9f7a65229e818176eef05da83f835107ba90ec2e95472e7" + "3e538f783b416c04654ba8909f26a12db6e5c4e376b7615e4a25819", + "a7d9dc68dacefb7d6116186048cb355cc548e11d" }, + { 480, "7cc9894454d0055ab5069a33984e2f712bef7e3124960d33559f5f3b81906bb" + "66fe64da13c153ca7f5cabc89667314c32c01036d12ecaf5f9a78de98", + "142e429f0522ba5abf5131fa81df82d355b96909" }, + { 488, "74e8404d5a453c5f4d306f2cfa338ca65501c840ddab3fb82117933483afd69" + "13c56aaf8a0a0a6b2a342fc3d9dc7599f4a850dfa15d06c61966d74ea59", + "ef72db70dcbcab991e9637976c6faf00d22caae9" }, + { 496, "46fe5ed326c8fe376fcc92dc9e2714e2240d3253b105adfbb256ff7a19bc409" + "75c604ad7c0071c4fd78a7cb64786e1bece548fa4833c04065fe593f6fb10", + "f220a7457f4588d639dc21407c942e9843f8e26b" }, + { 504, "836dfa2524d621cf07c3d2908835de859e549d35030433c796b81272fd8bc03" + "48e8ddbc7705a5ad1fdf2155b6bc48884ac0cd376925f069a37849c089c864" + "5", + "ddd2117b6e309c233ede85f962a0c2fc215e5c69" }, + { 512, "7e3a4c325cb9c52b88387f93d01ae86d42098f5efa7f9457388b5e74b6d28b2" + "438d42d8b64703324d4aa25ab6aad153ae30cd2b2af4d5e5c00a8a2d0220c61" + "16", + "a3054427cdb13f164a610b348702724c808a0dcc" } + }; + + for (i = 0; i < 65; i++) { + err = hash_test_case_add(&sha1_test_case_list, tc[i].hex_data, + tc[i].bit_len / 8, tc[i].hex_hash, 20); + if (err) { + printf("error adding hash test case (code %d)\n", err); + return err; + } + } + + return srtp_err_status_ok; +} + +srtp_err_status_t sha1_dealloc_test_cases(void) +{ + hash_test_case_t *t, *next; + + for (t = sha1_test_case_list; t != NULL; t = next) { + next = t->next_test_case; + free(t); + } + + sha1_test_case_list = NULL; + + return srtp_err_status_ok; +} + +srtp_err_status_t sha1_validate(void) +{ + hash_test_case_t *test_case; + srtp_err_status_t err; + + err = sha1_add_test_cases(); + if (err) { + printf("error adding SHA1 test cases (error code %d)\n", err); + return err; + } + + if (sha1_test_case_list == NULL) + return srtp_err_status_cant_check; + + test_case = sha1_test_case_list; + while (test_case != NULL) { + err = sha1_test_case_validate(test_case); + if (err) { + printf("error validating hash test case (error code %d)\n", err); + return err; + } + test_case = test_case->next_test_case; + } + + sha1_dealloc_test_cases(); + + return srtp_err_status_ok; +} + +int main(void) +{ + srtp_err_status_t err; + + printf("sha1 test driver\n"); + + err = sha1_validate(); + if (err) { + printf("SHA1 did not pass validation testing\n"); + return 1; + } + printf("SHA1 passed validation tests\n"); + + return 0; +} diff --git a/third_party/libsrtp/src/include/config.h b/third_party/libsrtp/src/include/config.h new file mode 100644 index 0000000000..75e05e897f --- /dev/null +++ b/third_party/libsrtp/src/include/config.h @@ -0,0 +1,6 @@ +/* + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + */ +/* empty file; config done via Makefile.in & configure.in */ diff --git a/third_party/libsrtp/src/include/srtp.h b/third_party/libsrtp/src/include/srtp.h new file mode 100644 index 0000000000..fa34daf641 --- /dev/null +++ b/third_party/libsrtp/src/include/srtp.h @@ -0,0 +1,1747 @@ +/* + * srtp.h + * + * interface to libsrtp + * + * David A. McGrew + * Cisco Systems, Inc. + */ +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef SRTP_SRTP_H +#define SRTP_SRTP_H + +#include <stdint.h> + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * @defgroup SRTP Secure RTP + * + * @brief libSRTP provides functions for protecting RTP and RTCP. See + * Section @ref Overview for an introduction to the use of the library. + * + * @{ + */ + +/* + * SRTP_MASTER_KEY_LEN is the nominal master key length supported by libSRTP + */ + +#define SRTP_MASTER_KEY_LEN 30 + +/* + * SRTP_MAX_KEY_LEN is the maximum key length supported by libSRTP + */ +#define SRTP_MAX_KEY_LEN 64 + +/* + * SRTP_MAX_TAG_LEN is the maximum tag length supported by libSRTP + */ + +#define SRTP_MAX_TAG_LEN 16 + +/** + * SRTP_MAX_MKI_LEN is the maximum size the MKI could be which is + * 128 bytes + */ +#define SRTP_MAX_MKI_LEN 128 + +/** + * SRTP_MAX_TRAILER_LEN is the maximum length of the SRTP trailer + * (authentication tag and MKI) supported by libSRTP. This value is + * the maximum number of octets that will be added to an RTP packet by + * srtp_protect(). + * + * @brief the maximum number of octets added by srtp_protect(). + */ +#define SRTP_MAX_TRAILER_LEN (SRTP_MAX_TAG_LEN + SRTP_MAX_MKI_LEN) + +/** + * SRTP_MAX_NUM_MASTER_KEYS is the maximum number of Master keys for + * MKI supported by libSRTP. + * + */ +#define SRTP_MAX_NUM_MASTER_KEYS 16 + +#define SRTP_SALT_LEN 14 + +/* + * SRTP_AEAD_SALT_LEN is the length of the SALT values used with + * GCM mode. GCM mode requires an IV. The SALT value is used + * as part of the IV formation logic applied to each RTP packet. + */ +#define SRTP_AEAD_SALT_LEN 12 + +#define SRTP_AES_128_KEY_LEN 16 +#define SRTP_AES_192_KEY_LEN 24 +#define SRTP_AES_256_KEY_LEN 32 + +#define SRTP_AES_ICM_128_KEY_LEN_WSALT (SRTP_SALT_LEN + SRTP_AES_128_KEY_LEN) +#define SRTP_AES_ICM_192_KEY_LEN_WSALT (SRTP_SALT_LEN + SRTP_AES_192_KEY_LEN) +#define SRTP_AES_ICM_256_KEY_LEN_WSALT (SRTP_SALT_LEN + SRTP_AES_256_KEY_LEN) + +#define SRTP_AES_GCM_128_KEY_LEN_WSALT \ + (SRTP_AEAD_SALT_LEN + SRTP_AES_128_KEY_LEN) +#define SRTP_AES_GCM_192_KEY_LEN_WSALT \ + (SRTP_AEAD_SALT_LEN + SRTP_AES_192_KEY_LEN) +#define SRTP_AES_GCM_256_KEY_LEN_WSALT \ + (SRTP_AEAD_SALT_LEN + SRTP_AES_256_KEY_LEN) + +/** + * @brief A srtp_cipher_type_id_t is an identifier for a particular cipher + * type. + * + * A srtp_cipher_type_id_t is an integer that represents a particular + * cipher type, e.g. the Advanced Encryption Standard (AES). A + * SRTP_NULL_CIPHER is available; this cipher leaves the data unchanged, + * and can be selected to indicate that no encryption is to take + * place. + * + * @ingroup Ciphers + */ +typedef uint32_t srtp_cipher_type_id_t; + +/** + * @brief An srtp_auth_type_id_t is an identifier for a particular + * authentication + * function. + * + * An srtp_auth_type_id_t is an integer that represents a particular + * authentication function type, e.g. HMAC-SHA1. A SRTP_NULL_AUTH is + * available; this authentication function performs no computation, + * and can be selected to indicate that no authentication is to take + * place. + * + * @ingroup Authentication + */ +typedef uint32_t srtp_auth_type_id_t; + +/** + * @brief srtp_err_status_t defines error codes. + * + * The enumeration srtp_err_status_t defines error codes. Note that the + * value of srtp_err_status_ok is equal to zero, which can simplify error + * checking somewhat. + * + */ +typedef enum { + srtp_err_status_ok = 0, /**< nothing to report */ + srtp_err_status_fail = 1, /**< unspecified failure */ + srtp_err_status_bad_param = 2, /**< unsupported parameter */ + srtp_err_status_alloc_fail = 3, /**< couldn't allocate memory */ + srtp_err_status_dealloc_fail = 4, /**< couldn't deallocate properly */ + srtp_err_status_init_fail = 5, /**< couldn't initialize */ + srtp_err_status_terminus = 6, /**< can't process as much data as */ + /**< requested */ + srtp_err_status_auth_fail = 7, /**< authentication failure */ + srtp_err_status_cipher_fail = 8, /**< cipher failure */ + srtp_err_status_replay_fail = 9, /**< replay check failed (bad index) */ + srtp_err_status_replay_old = 10, /**< replay check failed (index too */ + /**< old) */ + srtp_err_status_algo_fail = 11, /**< algorithm failed test routine */ + srtp_err_status_no_such_op = 12, /**< unsupported operation */ + srtp_err_status_no_ctx = 13, /**< no appropriate context found */ + srtp_err_status_cant_check = 14, /**< unable to perform desired */ + /**< validation */ + srtp_err_status_key_expired = 15, /**< can't use key any more */ + srtp_err_status_socket_err = 16, /**< error in use of socket */ + srtp_err_status_signal_err = 17, /**< error in use POSIX signals */ + srtp_err_status_nonce_bad = 18, /**< nonce check failed */ + srtp_err_status_read_fail = 19, /**< couldn't read data */ + srtp_err_status_write_fail = 20, /**< couldn't write data */ + srtp_err_status_parse_err = 21, /**< error parsing data */ + srtp_err_status_encode_err = 22, /**< error encoding data */ + srtp_err_status_semaphore_err = 23, /**< error while using semaphores */ + srtp_err_status_pfkey_err = 24, /**< error while using pfkey */ + srtp_err_status_bad_mki = 25, /**< error MKI present in packet is */ + /**< invalid */ + srtp_err_status_pkt_idx_old = 26, /**< packet index is too old to */ + /**< consider */ + srtp_err_status_pkt_idx_adv = 27 /**< packet index advanced, reset */ + /**< needed */ +} srtp_err_status_t; + +typedef struct srtp_ctx_t_ srtp_ctx_t; + +/** + * @brief srtp_sec_serv_t describes a set of security services. + * + * A srtp_sec_serv_t enumeration is used to describe the particular + * security services that will be applied by a particular crypto + * policy (or other mechanism). + */ +typedef enum { + sec_serv_none = 0, /**< no services */ + sec_serv_conf = 1, /**< confidentiality */ + sec_serv_auth = 2, /**< authentication */ + sec_serv_conf_and_auth = 3 /**< confidentiality and authentication */ +} srtp_sec_serv_t; + +/** + * @brief srtp_crypto_policy_t describes a particular crypto policy that + * can be applied to an SRTP stream. + * + * A srtp_crypto_policy_t describes a particular cryptographic policy that + * can be applied to an SRTP or SRTCP stream. An SRTP session policy + * consists of a list of these policies, one for each SRTP stream + * in the session. + */ +typedef struct srtp_crypto_policy_t { + srtp_cipher_type_id_t cipher_type; /**< An integer representing */ + /**< the type of cipher. */ + int cipher_key_len; /**< The length of the cipher key */ + /**< in octets. */ + srtp_auth_type_id_t auth_type; /**< An integer representing the */ + /**< authentication function. */ + int auth_key_len; /**< The length of the authentication */ + /**< function key in octets. */ + int auth_tag_len; /**< The length of the authentication */ + /**< tag in octets. */ + srtp_sec_serv_t sec_serv; /**< The flag indicating the security */ + /**< services to be applied. */ +} srtp_crypto_policy_t; + +/** + * @brief srtp_ssrc_type_t describes the type of an SSRC. + * + * An srtp_ssrc_type_t enumeration is used to indicate a type of SSRC. See + * @ref srtp_policy_t for more information. + */ +typedef enum { + ssrc_undefined = 0, /**< Indicates an undefined SSRC type. */ + ssrc_specific = 1, /**< Indicates a specific SSRC value */ + ssrc_any_inbound = 2, /**< Indicates any inbound SSRC value */ + /**< (i.e. a value that is used in the */ + /**< function srtp_unprotect()) */ + ssrc_any_outbound = 3 /**< Indicates any outbound SSRC value */ + /**< (i.e. a value that is used in the */ + /**< function srtp_protect()) */ +} srtp_ssrc_type_t; + +/** + * @brief An srtp_ssrc_t represents a particular SSRC value, or a `wildcard' + * SSRC. + * + * An srtp_ssrc_t represents a particular SSRC value (if its type is + * ssrc_specific), or a wildcard SSRC value that will match all + * outbound SSRCs (if its type is ssrc_any_outbound) or all inbound + * SSRCs (if its type is ssrc_any_inbound). + */ +typedef struct { + srtp_ssrc_type_t type; /**< The type of this particular SSRC */ + unsigned int value; /**< The value of this SSRC, if it is not a */ + /**< wildcard */ +} srtp_ssrc_t; + +/** + * @brief srtp_master_key_t represents a master key. There will + * be a Master Key Index and the Master Key associated with the + * Master Key Index. Need to also keep track of the Master Key + * Index Size to correctly read it from a packet. + */ +typedef struct srtp_master_key_t { + unsigned char *key; + unsigned char *mki_id; + unsigned int mki_size; +} srtp_master_key_t; + +/** + * @brief represents the policy for an SRTP session. + * + * A single srtp_policy_t struct represents the policy for a single + * SRTP stream, and a linked list of these elements represents the + * policy for an entire SRTP session. Each element contains the SRTP + * and SRTCP crypto policies for that stream, a pointer to the SRTP + * master key for that stream, the SSRC describing that stream, or a + * flag indicating a `wildcard' SSRC value, and a `next' field that + * holds a pointer to the next element in the list of policy elements, + * or NULL if it is the last element. + * + * The wildcard value SSRC_ANY_INBOUND matches any SSRC from an + * inbound stream that for which there is no explicit SSRC entry in + * another policy element. Similarly, the value SSRC_ANY_OUTBOUND + * will matches any SSRC from an outbound stream that does not appear + * in another policy element. Note that wildcard SSRCs &b cannot be + * used to match both inbound and outbound traffic. This restriction + * is intentional, and it allows libSRTP to ensure that no security + * lapses result from accidental re-use of SSRC values during key + * sharing. + * + * @warning The final element of the list @b must have its `next' pointer + * set to NULL. + */ + +typedef struct srtp_policy_t { + srtp_ssrc_t ssrc; /**< The SSRC value of stream, or the */ + /**< flags SSRC_ANY_INBOUND or */ + /**< SSRC_ANY_OUTBOUND if key sharing */ + /**< is used for this policy element. */ + srtp_crypto_policy_t rtp; /**< SRTP crypto policy. */ + srtp_crypto_policy_t rtcp; /**< SRTCP crypto policy. */ + unsigned char *key; /**< Pointer to the SRTP master key for */ + /**< this stream. */ + srtp_master_key_t **keys; /** Array of Master Key structures */ + unsigned long num_master_keys; /** Number of master keys */ + void *deprecated_ekt; /**< DEPRECATED: pointer to the EKT */ + /**< policy structure for this stream */ + unsigned long window_size; /**< The window size to use for replay */ + /**< protection. */ + int allow_repeat_tx; /**< Whether retransmissions of */ + /**< packets with the same sequence */ + /**< number are allowed. */ + /**< (Note that such repeated */ + /**< transmissions must have the same */ + /**< RTP payload, or a severe security */ + /**< weakness is introduced!) */ + int *enc_xtn_hdr; /**< List of header ids to encrypt. */ + int enc_xtn_hdr_count; /**< Number of entries in list of header */ + /**< ids. */ + struct srtp_policy_t *next; /**< Pointer to next stream policy. */ +} srtp_policy_t; + +/** + * @brief An srtp_t points to an SRTP session structure. + * + * The typedef srtp_t is a pointer to a structure that represents + * an SRTP session. This datatype is intentionally opaque in + * order to separate the interface from the implementation. + * + * An SRTP session consists of all of the traffic sent to the RTP and + * RTCP destination transport addresses, using the RTP/SAVP (Secure + * Audio/Video Profile). A session can be viewed as a set of SRTP + * streams, each of which originates with a different participant. + */ +typedef srtp_ctx_t *srtp_t; + +/** + * @brief srtp_init() initializes the srtp library. + * + * @warning This function @b must be called before any other srtp + * functions. + */ +srtp_err_status_t srtp_init(void); + +/** + * @brief srtp_shutdown() de-initializes the srtp library. + * + * @warning No srtp functions may be called after calling this function. + */ +srtp_err_status_t srtp_shutdown(void); + +/** + * @brief srtp_protect() is the Secure RTP sender-side packet processing + * function. + * + * The function call srtp_protect(ctx, rtp_hdr, len_ptr) applies SRTP + * protection to the RTP packet rtp_hdr (which has length *len_ptr) using + * the SRTP context ctx. If srtp_err_status_ok is returned, then rtp_hdr + * points to the resulting SRTP packet and *len_ptr is the number of + * octets in that packet; otherwise, no assumptions should be made + * about the value of either data elements. + * + * The sequence numbers of the RTP packets presented to this function + * need not be consecutive, but they @b must be out of order by less + * than 2^15 = 32,768 packets. + * + * @warning This function assumes that it can write the authentication + * tag into the location in memory immediately following the RTP + * packet, and assumes that the RTP packet is aligned on a 32-bit + * boundary. + * + * @warning This function assumes that it can write SRTP_MAX_TRAILER_LEN + * into the location in memory immediately following the RTP packet. + * Callers MUST ensure that this much writable memory is available in + * the buffer that holds the RTP packet. + * + * @param ctx is the SRTP context to use in processing the packet. + * + * @param rtp_hdr is a pointer to the RTP packet (before the call); after + * the function returns, it points to the srtp packet. + * + * @param len_ptr is a pointer to the length in octets of the complete + * RTP packet (header and body) before the function call, and of the + * complete SRTP packet after the call, if srtp_err_status_ok was returned. + * Otherwise, the value of the data to which it points is undefined. + * + * @return + * - srtp_err_status_ok no problems + * - srtp_err_status_replay_fail rtp sequence number was non-increasing + * - @e other failure in cryptographic mechanisms + */ +srtp_err_status_t srtp_protect(srtp_t ctx, void *rtp_hdr, int *len_ptr); + +/** + * @brief srtp_protect_mki() is the Secure RTP sender-side packet processing + * function that can utilize MKI. + * + * The function call srtp_protect(ctx, rtp_hdr, len_ptr) applies SRTP + * protection to the RTP packet rtp_hdr (which has length *len_ptr) using + * the SRTP context ctx. If srtp_err_status_ok is returned, then rtp_hdr + * points to the resulting SRTP packet and *len_ptr is the number of + * octets in that packet; otherwise, no assumptions should be made + * about the value of either data elements. + * + * The sequence numbers of the RTP packets presented to this function + * need not be consecutive, but they @b must be out of order by less + * than 2^15 = 32,768 packets. + * + * @warning This function assumes that it can write the authentication + * tag into the location in memory immediately following the RTP + * packet, and assumes that the RTP packet is aligned on a 32-bit + * boundary. + * + * @warning This function assumes that it can write SRTP_MAX_TRAILER_LEN + * into the location in memory immediately following the RTP packet. + * Callers MUST ensure that this much writable memory is available in + * the buffer that holds the RTP packet. + * + * @param ctx is the SRTP context to use in processing the packet. + * + * @param rtp_hdr is a pointer to the RTP packet (before the call); after + * the function returns, it points to the srtp packet. + * + * @param pkt_octet_len is a pointer to the length in octets of the complete + * RTP packet (header and body) before the function call, and of the + * complete SRTP packet after the call, if srtp_err_status_ok was returned. + * Otherwise, the value of the data to which it points is undefined. + * + * @param use_mki is a boolean to tell the system if mki is being used. If + * set to false then will use the first set of session keys. If set to true + * will + * use the session keys identified by the mki_index + * + * @param mki_index integer value specifying which set of session keys should be + * used if use_mki is set to true. + * + * @return + * - srtp_err_status_ok no problems + * - srtp_err_status_replay_fail rtp sequence number was non-increasing + * - @e other failure in cryptographic mechanisms + */ +srtp_err_status_t srtp_protect_mki(srtp_ctx_t *ctx, + void *rtp_hdr, + int *pkt_octet_len, + unsigned int use_mki, + unsigned int mki_index); + +/** + * @brief srtp_unprotect() is the Secure RTP receiver-side packet + * processing function. + * + * The function call srtp_unprotect(ctx, srtp_hdr, len_ptr) verifies + * the Secure RTP protection of the SRTP packet pointed to by srtp_hdr + * (which has length *len_ptr), using the SRTP context ctx. If + * srtp_err_status_ok is returned, then srtp_hdr points to the resulting + * RTP packet and *len_ptr is the number of octets in that packet; + * otherwise, no assumptions should be made about the value of either + * data elements. + * + * The sequence numbers of the RTP packets presented to this function + * need not be consecutive, but they @b must be out of order by less + * than 2^15 = 32,768 packets. + * + * @warning This function assumes that the SRTP packet is aligned on a + * 32-bit boundary. + * + * @param ctx is the SRTP session which applies to the particular packet. + * + * @param srtp_hdr is a pointer to the header of the SRTP packet + * (before the call). after the function returns, it points to the + * rtp packet if srtp_err_status_ok was returned; otherwise, the value of + * the data to which it points is undefined. + * + * @param len_ptr is a pointer to the length in octets of the complete + * srtp packet (header and body) before the function call, and of the + * complete rtp packet after the call, if srtp_err_status_ok was returned. + * Otherwise, the value of the data to which it points is undefined. + * + * @return + * - srtp_err_status_ok if the RTP packet is valid. + * - srtp_err_status_auth_fail if the SRTP packet failed the message + * authentication check. + * - srtp_err_status_replay_fail if the SRTP packet is a replay (e.g. packet + * has already been processed and accepted). + * - [other] if there has been an error in the cryptographic mechanisms. + * + */ +srtp_err_status_t srtp_unprotect(srtp_t ctx, void *srtp_hdr, int *len_ptr); + +/** + * @brief srtp_unprotect_mki() is the Secure RTP receiver-side packet + * processing function that checks for MKI. + * + * The function call srtp_unprotect(ctx, srtp_hdr, len_ptr) verifies + * the Secure RTP protection of the SRTP packet pointed to by srtp_hdr + * (which has length *len_ptr), using the SRTP context ctx. If + * srtp_err_status_ok is returned, then srtp_hdr points to the resulting + * RTP packet and *len_ptr is the number of octets in that packet; + * otherwise, no assumptions should be made about the value of either + * data elements. + * + * The sequence numbers of the RTP packets presented to this function + * need not be consecutive, but they @b must be out of order by less + * than 2^15 = 32,768 packets. + * + * @warning This function assumes that the SRTP packet is aligned on a + * 32-bit boundary. + * + * @param ctx is the SRTP session which applies to the particular packet. + * + * @param srtp_hdr is a pointer to the header of the SRTP packet + * (before the call). after the function returns, it points to the + * rtp packet if srtp_err_status_ok was returned; otherwise, the value of + * the data to which it points is undefined. + * + * @param len_ptr is a pointer to the length in octets of the complete + * srtp packet (header and body) before the function call, and of the + * complete rtp packet after the call, if srtp_err_status_ok was returned. + * Otherwise, the value of the data to which it points is undefined. + * + * @param use_mki is a boolean to tell the system if mki is being used. If + * set to false then will use the first set of session keys. If set to true + * will + * use the session keys identified by the mki_index + * + * @return + * - srtp_err_status_ok if the RTP packet is valid. + * - srtp_err_status_auth_fail if the SRTP packet failed the message + * authentication check. + * - srtp_err_status_replay_fail if the SRTP packet is a replay (e.g. packet + * has already been processed and accepted). + * - srtp_err_status_bad_mki if the MKI in the packet is not a known MKI id + * - [other] if there has been an error in the cryptographic mechanisms. + * + */ +srtp_err_status_t srtp_unprotect_mki(srtp_t ctx, + void *srtp_hdr, + int *len_ptr, + unsigned int use_mki); + +/** + * @brief srtp_create() allocates and initializes an SRTP session. + + * The function call srtp_create(session, policy) allocates and + * initializes an SRTP session context, applying the given policy. + * + * @param session is a pointer to the SRTP session to which the policy is + * to be added. + * + * @param policy is the srtp_policy_t struct that describes the policy + * for the session. The struct may be a single element, or it may be + * the head of a list, in which case each element of the list is + * processed. It may also be NULL, in which case streams should be added + * later using srtp_add_stream(). The final element of the list @b must + * have its `next' field set to NULL. + * + * @return + * - srtp_err_status_ok if creation succeeded. + * - srtp_err_status_alloc_fail if allocation failed. + * - srtp_err_status_init_fail if initialization failed. + */ +srtp_err_status_t srtp_create(srtp_t *session, const srtp_policy_t *policy); + +/** + * @brief srtp_add_stream() allocates and initializes an SRTP stream + * within a given SRTP session. + * + * The function call srtp_add_stream(session, policy) allocates and + * initializes a new SRTP stream within a given, previously created + * session, applying the policy given as the other argument to that + * stream. + * + * @return values: + * - srtp_err_status_ok if stream creation succeeded. + * - srtp_err_status_alloc_fail if stream allocation failed + * - srtp_err_status_init_fail if stream initialization failed. + */ +srtp_err_status_t srtp_add_stream(srtp_t session, const srtp_policy_t *policy); + +/** + * @brief srtp_remove_stream() deallocates an SRTP stream. + * + * The function call srtp_remove_stream(session, ssrc) removes + * the SRTP stream with the SSRC value ssrc from the SRTP session + * context given by the argument session. + * + * @param session is the SRTP session from which the stream + * will be removed. + * + * @param ssrc is the SSRC value of the stream to be removed + * in network byte order. + * + * @warning Wildcard SSRC values cannot be removed from a + * session. + * + * @return + * - srtp_err_status_ok if the stream deallocation succeeded. + * - [other] otherwise. + * + */ +srtp_err_status_t srtp_remove_stream(srtp_t session, unsigned int ssrc); + +/** + * @brief srtp_update() updates all streams in the session. + * + * The function call srtp_update(session, policy) updates + * all the streams in the session applying the given policy + * and key. The existing ROC value of all streams will be + * preserved. + * + * @param session is the SRTP session that contains the streams + * to be updated. + * + * @param policy is the srtp_policy_t struct that describes the policy + * for the session. The struct may be a single element, or it may be + * the head of a list, in which case each element of the list is + * processed. The final element of the list @b must + * have its `next' field set to NULL. + * + * @return + * - srtp_err_status_ok if stream creation succeed. + * - srtp_err_status_alloc_fail if stream allocation failed + * - srtp_err_status_init_fail if stream initialization failed. + * - [other] otherwise. + * + */ +srtp_err_status_t srtp_update(srtp_t session, const srtp_policy_t *policy); + +/** + * @brief srtp_update_stream() updates a SRTP stream. + * + * The function call srtp_update_stream(session, policy) updates + * the stream(s) in the session that match applying the given + * policy and key. The existing ROC value of all stream(s) will + * be preserved. + * + * @param session is the SRTP session that contains the streams + * to be updated. + * + * @param policy is the srtp_policy_t struct that describes the policy + * for the session. + * + * @return + * - srtp_err_status_ok if stream creation succeeded. + * - srtp_err_status_alloc_fail if stream allocation failed + * - srtp_err_status_init_fail if stream initialization failed. + * - [other] otherwise. + * + */ +srtp_err_status_t srtp_update_stream(srtp_t session, + const srtp_policy_t *policy); + +/** + * @brief srtp_crypto_policy_set_rtp_default() sets a crypto policy + * structure to the SRTP default policy for RTP protection. + * + * @param p is a pointer to the policy structure to be set + * + * The function call srtp_crypto_policy_set_rtp_default(&p) sets the + * srtp_crypto_policy_t at location p to the SRTP default policy for RTP + * protection, as defined in the specification. This function is a + * convenience that helps to avoid dealing directly with the policy + * data structure. You are encouraged to initialize policy elements + * with this function call. Doing so may allow your code to be + * forward compatible with later versions of libSRTP that include more + * elements in the srtp_crypto_policy_t datatype. + * + * @return void. + * + */ +void srtp_crypto_policy_set_rtp_default(srtp_crypto_policy_t *p); + +/** + * @brief srtp_crypto_policy_set_rtcp_default() sets a crypto policy + * structure to the SRTP default policy for RTCP protection. + * + * @param p is a pointer to the policy structure to be set + * + * The function call srtp_crypto_policy_set_rtcp_default(&p) sets the + * srtp_crypto_policy_t at location p to the SRTP default policy for RTCP + * protection, as defined in the specification. This function is a + * convenience that helps to avoid dealing directly with the policy + * data structure. You are encouraged to initialize policy elements + * with this function call. Doing so may allow your code to be + * forward compatible with later versions of libSRTP that include more + * elements in the srtp_crypto_policy_t datatype. + * + * @return void. + * + */ +void srtp_crypto_policy_set_rtcp_default(srtp_crypto_policy_t *p); + +/** + * @brief srtp_crypto_policy_set_aes_cm_128_hmac_sha1_80() sets a crypto + * policy structure to the SRTP default policy for RTP protection. + * + * @param p is a pointer to the policy structure to be set + * + * The function srtp_crypto_policy_set_aes_cm_128_hmac_sha1_80() is a + * synonym for srtp_crypto_policy_set_rtp_default(). It conforms to the + * naming convention used in RFC 4568 (SDP Security Descriptions for + * Media Streams). + * + * @return void. + * + */ +#define srtp_crypto_policy_set_aes_cm_128_hmac_sha1_80(p) \ + srtp_crypto_policy_set_rtp_default(p) + +/** + * @brief srtp_crypto_policy_set_aes_cm_128_hmac_sha1_32() sets a crypto + * policy structure to a short-authentication tag policy + * + * @param p is a pointer to the policy structure to be set + * + * The function call srtp_crypto_policy_set_aes_cm_128_hmac_sha1_32(&p) + * sets the srtp_crypto_policy_t at location p to use policy + * AES_CM_128_HMAC_SHA1_32 as defined in RFC 4568. + * This policy uses AES-128 + * Counter Mode encryption and HMAC-SHA1 authentication, with an + * authentication tag that is only 32 bits long. This length is + * considered adequate only for protecting audio and video media that + * use a stateless playback function. See Section 7.5 of RFC 3711 + * (http://www.ietf.org/rfc/rfc3711.txt). + * + * This function is a convenience that helps to avoid dealing directly + * with the policy data structure. You are encouraged to initialize + * policy elements with this function call. Doing so may allow your + * code to be forward compatible with later versions of libSRTP that + * include more elements in the srtp_crypto_policy_t datatype. + * + * @warning This crypto policy is intended for use in SRTP, but not in + * SRTCP. It is recommended that a policy that uses longer + * authentication tags be used for SRTCP. See Section 7.5 of RFC 3711 + * (http://www.ietf.org/rfc/rfc3711.txt). + * + * @return void. + * + */ +void srtp_crypto_policy_set_aes_cm_128_hmac_sha1_32(srtp_crypto_policy_t *p); + +/** + * @brief srtp_crypto_policy_set_aes_cm_128_null_auth() sets a crypto + * policy structure to an encryption-only policy + * + * @param p is a pointer to the policy structure to be set + * + * The function call srtp_crypto_policy_set_aes_cm_128_null_auth(&p) sets + * the srtp_crypto_policy_t at location p to use the SRTP default cipher + * (AES-128 Counter Mode), but to use no authentication method. This + * policy is NOT RECOMMENDED unless it is unavoidable; see Section 7.5 + * of RFC 3711 (http://www.ietf.org/rfc/rfc3711.txt). + * + * This function is a convenience that helps to avoid dealing directly + * with the policy data structure. You are encouraged to initialize + * policy elements with this function call. Doing so may allow your + * code to be forward compatible with later versions of libSRTP that + * include more elements in the srtp_crypto_policy_t datatype. + * + * @warning This policy is NOT RECOMMENDED for SRTP unless it is + * unavoidable, and it is NOT RECOMMENDED at all for SRTCP; see + * Section 7.5 of RFC 3711 (http://www.ietf.org/rfc/rfc3711.txt). + * + * @return void. + * + */ +void srtp_crypto_policy_set_aes_cm_128_null_auth(srtp_crypto_policy_t *p); + +/** + * @brief srtp_crypto_policy_set_null_cipher_hmac_sha1_80() sets a crypto + * policy structure to an authentication-only policy + * + * @param p is a pointer to the policy structure to be set + * + * The function call srtp_crypto_policy_set_null_cipher_hmac_sha1_80(&p) + * sets the srtp_crypto_policy_t at location p to use HMAC-SHA1 with an 80 + * bit authentication tag to provide message authentication, but to + * use no encryption. This policy is NOT RECOMMENDED for SRTP unless + * there is a requirement to forgo encryption. + * + * This function is a convenience that helps to avoid dealing directly + * with the policy data structure. You are encouraged to initialize + * policy elements with this function call. Doing so may allow your + * code to be forward compatible with later versions of libSRTP that + * include more elements in the srtp_crypto_policy_t datatype. + * + * @warning This policy is NOT RECOMMENDED for SRTP unless there is a + * requirement to forgo encryption. + * + * @return void. + * + */ +void srtp_crypto_policy_set_null_cipher_hmac_sha1_80(srtp_crypto_policy_t *p); + +/** + * @brief srtp_crypto_policy_set_null_cipher_hmac_null() sets a crypto + * policy structure to use no encryption or authentication. + * + * @param p is a pointer to the policy structure to be set + * + * The function call srtp_crypto_policy_set_null_cipher_hmac_null(&p) + * sets the srtp_crypto_policy_t at location p to use no encryption and + * no authentication. This policy should only be used for testing and + * troubleshooting. + * + * This function is a convenience that helps to avoid dealing directly + * with the policy data structure. You are encouraged to initialize + * policy elements with this function call. Doing so may allow your + * code to be forward compatible with later versions of libSRTP that + * include more elements in the srtp_crypto_policy_t datatype. + * + * @warning This policy is NOT RECOMMENDED for SRTP unless there is a + * requirement to forgo encryption and authentication. + * + * @return void. + * + */ +void srtp_crypto_policy_set_null_cipher_hmac_null(srtp_crypto_policy_t *p); + +/** + * @brief srtp_crypto_policy_set_aes_cm_256_hmac_sha1_80() sets a crypto + * policy structure to a encryption and authentication policy using AES-256 + * for RTP protection. + * + * @param p is a pointer to the policy structure to be set + * + * The function call srtp_crypto_policy_set_aes_cm_256_hmac_sha1_80(&p) + * sets the srtp_crypto_policy_t at location p to use policy + * AES_CM_256_HMAC_SHA1_80 as defined in RFC 6188. This policy uses AES-256 + * Counter Mode encryption and HMAC-SHA1 authentication, with an 80 bit + * authentication tag. + * + * This function is a convenience that helps to avoid dealing directly + * with the policy data structure. You are encouraged to initialize + * policy elements with this function call. Doing so may allow your + * code to be forward compatible with later versions of libSRTP that + * include more elements in the srtp_crypto_policy_t datatype. + * + * @return void. + * + */ +void srtp_crypto_policy_set_aes_cm_256_hmac_sha1_80(srtp_crypto_policy_t *p); + +/** + * @brief srtp_crypto_policy_set_aes_cm_256_hmac_sha1_32() sets a crypto + * policy structure to a short-authentication tag policy using AES-256 + * encryption. + * + * @param p is a pointer to the policy structure to be set + * + * The function call srtp_crypto_policy_set_aes_cm_256_hmac_sha1_32(&p) + * sets the srtp_crypto_policy_t at location p to use policy + * AES_CM_256_HMAC_SHA1_32 as defined in RFC 6188. This policy uses AES-256 + * Counter Mode encryption and HMAC-SHA1 authentication, with an + * authentication tag that is only 32 bits long. This length is + * considered adequate only for protecting audio and video media that + * use a stateless playback function. See Section 7.5 of RFC 3711 + * (http://www.ietf.org/rfc/rfc3711.txt). + * + * This function is a convenience that helps to avoid dealing directly + * with the policy data structure. You are encouraged to initialize + * policy elements with this function call. Doing so may allow your + * code to be forward compatible with later versions of libSRTP that + * include more elements in the srtp_crypto_policy_t datatype. + * + * @warning This crypto policy is intended for use in SRTP, but not in + * SRTCP. It is recommended that a policy that uses longer + * authentication tags be used for SRTCP. See Section 7.5 of RFC 3711 + * (http://www.ietf.org/rfc/rfc3711.txt). + * + * @return void. + * + */ +void srtp_crypto_policy_set_aes_cm_256_hmac_sha1_32(srtp_crypto_policy_t *p); + +/** + * @brief srtp_crypto_policy_set_aes_cm_256_null_auth() sets a crypto + * policy structure to an encryption-only policy + * + * @param p is a pointer to the policy structure to be set + * + * The function call srtp_crypto_policy_set_aes_cm_256_null_auth(&p) sets + * the srtp_crypto_policy_t at location p to use the SRTP default cipher + * (AES-256 Counter Mode), but to use no authentication method. This + * policy is NOT RECOMMENDED unless it is unavoidable; see Section 7.5 + * of RFC 3711 (http://www.ietf.org/rfc/rfc3711.txt). + * + * This function is a convenience that helps to avoid dealing directly + * with the policy data structure. You are encouraged to initialize + * policy elements with this function call. Doing so may allow your + * code to be forward compatible with later versions of libSRTP that + * include more elements in the srtp_crypto_policy_t datatype. + * + * @warning This policy is NOT RECOMMENDED for SRTP unless it is + * unavoidable, and it is NOT RECOMMENDED at all for SRTCP; see + * Section 7.5 of RFC 3711 (http://www.ietf.org/rfc/rfc3711.txt). + * + * @return void. + * + */ +void srtp_crypto_policy_set_aes_cm_256_null_auth(srtp_crypto_policy_t *p); + +/** + * @brief srtp_crypto_policy_set_aes_cm_192_hmac_sha1_80() sets a crypto + * policy structure to a encryption and authentication policy using AES-192 + * for RTP protection. + * + * @param p is a pointer to the policy structure to be set + * + * The function call srtp_crypto_policy_set_aes_cm_192_hmac_sha1_80(&p) + * sets the srtp_crypto_policy_t at location p to use policy + * AES_CM_192_HMAC_SHA1_80 as defined in RFC 6188. This policy uses AES-192 + * Counter Mode encryption and HMAC-SHA1 authentication, with an 80 bit + * authentication tag. + * + * This function is a convenience that helps to avoid dealing directly + * with the policy data structure. You are encouraged to initialize + * policy elements with this function call. Doing so may allow your + * code to be forward compatible with later versions of libSRTP that + * include more elements in the srtp_crypto_policy_t datatype. + * + * @return void. + * + */ +void srtp_crypto_policy_set_aes_cm_192_hmac_sha1_80(srtp_crypto_policy_t *p); + +/** + * @brief srtp_crypto_policy_set_aes_cm_192_hmac_sha1_32() sets a crypto + * policy structure to a short-authentication tag policy using AES-192 + * encryption. + * + * @param p is a pointer to the policy structure to be set + * + * The function call srtp_crypto_policy_set_aes_cm_192_hmac_sha1_32(&p) + * sets the srtp_crypto_policy_t at location p to use policy + * AES_CM_192_HMAC_SHA1_32 as defined in RFC 6188. This policy uses AES-192 + * Counter Mode encryption and HMAC-SHA1 authentication, with an + * authentication tag that is only 32 bits long. This length is + * considered adequate only for protecting audio and video media that + * use a stateless playback function. See Section 7.5 of RFC 3711 + * (http://www.ietf.org/rfc/rfc3711.txt). + * + * This function is a convenience that helps to avoid dealing directly + * with the policy data structure. You are encouraged to initialize + * policy elements with this function call. Doing so may allow your + * code to be forward compatible with later versions of libSRTP that + * include more elements in the srtp_crypto_policy_t datatype. + * + * @warning This crypto policy is intended for use in SRTP, but not in + * SRTCP. It is recommended that a policy that uses longer + * authentication tags be used for SRTCP. See Section 7.5 of RFC 3711 + * (http://www.ietf.org/rfc/rfc3711.txt). + * + * @return void. + * + */ +void srtp_crypto_policy_set_aes_cm_192_hmac_sha1_32(srtp_crypto_policy_t *p); + +/** + * @brief srtp_crypto_policy_set_aes_cm_192_null_auth() sets a crypto + * policy structure to an encryption-only policy + * + * @param p is a pointer to the policy structure to be set + * + * The function call srtp_crypto_policy_set_aes_cm_192_null_auth(&p) sets + * the srtp_crypto_policy_t at location p to use the SRTP default cipher + * (AES-192 Counter Mode), but to use no authentication method. This + * policy is NOT RECOMMENDED unless it is unavoidable; see Section 7.5 + * of RFC 3711 (http://www.ietf.org/rfc/rfc3711.txt). + * + * This function is a convenience that helps to avoid dealing directly + * with the policy data structure. You are encouraged to initialize + * policy elements with this function call. Doing so may allow your + * code to be forward compatible with later versions of libSRTP that + * include more elements in the srtp_crypto_policy_t datatype. + * + * @warning This policy is NOT RECOMMENDED for SRTP unless it is + * unavoidable, and it is NOT RECOMMENDED at all for SRTCP; see + * Section 7.5 of RFC 3711 (http://www.ietf.org/rfc/rfc3711.txt). + * + * @return void. + * + */ +void srtp_crypto_policy_set_aes_cm_192_null_auth(srtp_crypto_policy_t *p); + +/** + * @brief srtp_crypto_policy_set_aes_gcm_128_8_auth() sets a crypto + * policy structure to an AEAD encryption policy. + * + * @param p is a pointer to the policy structure to be set + * + * The function call srtp_crypto_policy_set_aes_gcm_128_8_auth(&p) sets + * the srtp_crypto_policy_t at location p to use the SRTP default cipher + * (AES-128 Galois Counter Mode) with 8 octet auth tag. This + * policy applies confidentiality and authentication to both the + * RTP and RTCP packets. + * + * This function is a convenience that helps to avoid dealing directly + * with the policy data structure. You are encouraged to initialize + * policy elements with this function call. Doing so may allow your + * code to be forward compatible with later versions of libSRTP that + * include more elements in the srtp_crypto_policy_t datatype. + * + * @return void. + * + */ +void srtp_crypto_policy_set_aes_gcm_128_8_auth(srtp_crypto_policy_t *p); + +/** + * @brief srtp_crypto_policy_set_aes_gcm_256_8_auth() sets a crypto + * policy structure to an AEAD encryption policy + * + * @param p is a pointer to the policy structure to be set + * + * The function call srtp_crypto_policy_set_aes_gcm_256_8_auth(&p) sets + * the srtp_crypto_policy_t at location p to use the SRTP default cipher + * (AES-256 Galois Counter Mode) with 8 octet auth tag. This + * policy applies confidentiality and authentication to both the + * RTP and RTCP packets. + * + * This function is a convenience that helps to avoid dealing directly + * with the policy data structure. You are encouraged to initialize + * policy elements with this function call. Doing so may allow your + * code to be forward compatible with later versions of libSRTP that + * include more elements in the srtp_crypto_policy_t datatype. + * + * @return void. + * + */ +void srtp_crypto_policy_set_aes_gcm_256_8_auth(srtp_crypto_policy_t *p); + +/** + * @brief srtp_crypto_policy_set_aes_gcm_128_8_only_auth() sets a crypto + * policy structure to an AEAD authentication-only policy + * + * @param p is a pointer to the policy structure to be set + * + * The function call srtp_crypto_policy_set_aes_gcm_128_8_only_auth(&p) sets + * the srtp_crypto_policy_t at location p to use the SRTP default cipher + * (AES-128 Galois Counter Mode) with 8 octet auth tag. This policy + * applies confidentiality and authentication to the RTP packets, + * but only authentication to the RTCP packets. + * + * This function is a convenience that helps to avoid dealing directly + * with the policy data structure. You are encouraged to initialize + * policy elements with this function call. Doing so may allow your + * code to be forward compatible with later versions of libSRTP that + * include more elements in the srtp_crypto_policy_t datatype. + * + * @return void. + * + */ +void srtp_crypto_policy_set_aes_gcm_128_8_only_auth(srtp_crypto_policy_t *p); + +/** + * @brief srtp_crypto_policy_set_aes_gcm_256_8_only_auth() sets a crypto + * policy structure to an AEAD authentication-only policy + * + * @param p is a pointer to the policy structure to be set + * + * The function call srtp_crypto_policy_set_aes_gcm_256_8_only_auth(&p) sets + * the srtp_crypto_policy_t at location p to use the SRTP default cipher + * (AES-256 Galois Counter Mode) with 8 octet auth tag. This policy + * applies confidentiality and authentication to the RTP packets, + * but only authentication to the RTCP packets. + * + * This function is a convenience that helps to avoid dealing directly + * with the policy data structure. You are encouraged to initialize + * policy elements with this function call. Doing so may allow your + * code to be forward compatible with later versions of libSRTP that + * include more elements in the srtp_crypto_policy_t datatype. + * + * @return void. + * + */ +void srtp_crypto_policy_set_aes_gcm_256_8_only_auth(srtp_crypto_policy_t *p); + +/** + * @brief srtp_crypto_policy_set_aes_gcm_128_16_auth() sets a crypto + * policy structure to an AEAD encryption policy. + * + * @param p is a pointer to the policy structure to be set + * + * The function call srtp_crypto_policy_set_aes_gcm_128_16_auth(&p) sets + * the srtp_crypto_policy_t at location p to use the SRTP default cipher + * (AES-128 Galois Counter Mode) with 16 octet auth tag. This + * policy applies confidentiality and authentication to both the + * RTP and RTCP packets. + * + * This function is a convenience that helps to avoid dealing directly + * with the policy data structure. You are encouraged to initialize + * policy elements with this function call. Doing so may allow your + * code to be forward compatible with later versions of libSRTP that + * include more elements in the srtp_crypto_policy_t datatype. + * + * @return void. + * + */ +void srtp_crypto_policy_set_aes_gcm_128_16_auth(srtp_crypto_policy_t *p); + +/** + * @brief srtp_crypto_policy_set_aes_gcm_256_16_auth() sets a crypto + * policy structure to an AEAD encryption policy + * + * @param p is a pointer to the policy structure to be set + * + * The function call srtp_crypto_policy_set_aes_gcm_256_16_auth(&p) sets + * the srtp_crypto_policy_t at location p to use the SRTP default cipher + * (AES-256 Galois Counter Mode) with 16 octet auth tag. This + * policy applies confidentiality and authentication to both the + * RTP and RTCP packets. + * + * This function is a convenience that helps to avoid dealing directly + * with the policy data structure. You are encouraged to initialize + * policy elements with this function call. Doing so may allow your + * code to be forward compatible with later versions of libSRTP that + * include more elements in the srtp_crypto_policy_t datatype. + * + * @return void. + * + */ +void srtp_crypto_policy_set_aes_gcm_256_16_auth(srtp_crypto_policy_t *p); + +/** + * @brief srtp_dealloc() deallocates storage for an SRTP session + * context. + * + * The function call srtp_dealloc(s) deallocates storage for the + * SRTP session context s. This function should be called no more + * than one time for each of the contexts allocated by the function + * srtp_create(). + * + * @param s is the srtp_t for the session to be deallocated. + * + * @return + * - srtp_err_status_ok if there no problems. + * - srtp_err_status_dealloc_fail a memory deallocation failure occurred. + */ +srtp_err_status_t srtp_dealloc(srtp_t s); + +/* + * @brief identifies a particular SRTP profile + * + * An srtp_profile_t enumeration is used to identify a particular SRTP + * profile (that is, a set of algorithms and parameters). + */ +typedef enum { + srtp_profile_reserved = 0, + srtp_profile_aes128_cm_sha1_80 = 1, + srtp_profile_aes128_cm_sha1_32 = 2, + srtp_profile_null_sha1_80 = 5, + srtp_profile_null_sha1_32 = 6, + srtp_profile_aead_aes_128_gcm = 7, + srtp_profile_aead_aes_256_gcm = 8, +} srtp_profile_t; + +/** + * @brief srtp_crypto_policy_set_from_profile_for_rtp() sets a crypto policy + * structure to the appropriate value for RTP based on an srtp_profile_t + * + * @param policy is a pointer to the policy structure to be set + * + * @param profile is an enumeration for the policy to be set + * + * The function call srtp_crypto_policy_set_rtp_default(&policy, profile) + * sets the srtp_crypto_policy_t at location policy to the policy for RTP + * protection, as defined by the srtp_profile_t profile. + * + * This function is a convenience that helps to avoid dealing directly + * with the policy data structure. You are encouraged to initialize + * policy elements with this function call. Doing so may allow your + * code to be forward compatible with later versions of libSRTP that + * include more elements in the srtp_crypto_policy_t datatype. + * + * @return values + * - srtp_err_status_ok no problems were encountered + * - srtp_err_status_bad_param the profile is not supported + * + */ +srtp_err_status_t srtp_crypto_policy_set_from_profile_for_rtp( + srtp_crypto_policy_t *policy, + srtp_profile_t profile); + +/** + * @brief srtp_crypto_policy_set_from_profile_for_rtcp() sets a crypto policy + * structure to the appropriate value for RTCP based on an srtp_profile_t + * + * @param policy is a pointer to the policy structure to be set + * + * @param profile is an enumeration for the policy to be set + * + * The function call srtp_crypto_policy_set_rtcp_default(&policy, profile) + * sets the srtp_crypto_policy_t at location policy to the policy for RTCP + * protection, as defined by the srtp_profile_t profile. + * + * This function is a convenience that helps to avoid dealing directly + * with the policy data structure. You are encouraged to initialize + * policy elements with this function call. Doing so may allow your + * code to be forward compatible with later versions of libSRTP that + * include more elements in the srtp_crypto_policy_t datatype. + * + * @return values + * - srtp_err_status_ok no problems were encountered + * - srtp_err_status_bad_param the profile is not supported + * + */ +srtp_err_status_t srtp_crypto_policy_set_from_profile_for_rtcp( + srtp_crypto_policy_t *policy, + srtp_profile_t profile); + +/** + * @brief returns the master key length for a given SRTP profile + */ +unsigned int srtp_profile_get_master_key_length(srtp_profile_t profile); + +/** + * @brief returns the master salt length for a given SRTP profile + */ +unsigned int srtp_profile_get_master_salt_length(srtp_profile_t profile); + +/** + * @brief appends the salt to the key + * + * The function call srtp_append_salt_to_key(k, klen, s, slen) + * copies the string s to the location at klen bytes following + * the location k. + * + * @warning There must be at least bytes_in_salt + bytes_in_key bytes + * available at the location pointed to by key. + * + */ +void srtp_append_salt_to_key(unsigned char *key, + unsigned int bytes_in_key, + unsigned char *salt, + unsigned int bytes_in_salt); + +/** + * @} + */ + +/** + * @defgroup SRTCP Secure RTCP + * @ingroup SRTP + * + * @brief Secure RTCP functions are used to protect RTCP traffic. + * + * RTCP is the control protocol for RTP. libSRTP protects RTCP + * traffic in much the same way as it does RTP traffic. The function + * srtp_protect_rtcp() applies cryptographic protections to outbound + * RTCP packets, and srtp_unprotect_rtcp() verifies the protections on + * inbound RTCP packets. + * + * A note on the naming convention: srtp_protect_rtcp() has an srtp_t + * as its first argument, and thus has `srtp_' as its prefix. The + * trailing `_rtcp' indicates the protocol on which it acts. + * + * @{ + */ + +/** + * @brief srtp_protect_rtcp() is the Secure RTCP sender-side packet + * processing function. + * + * The function call srtp_protect_rtcp(ctx, rtp_hdr, len_ptr) applies + * SRTCP protection to the RTCP packet rtcp_hdr (which has length + * *len_ptr) using the SRTP session context ctx. If srtp_err_status_ok is + * returned, then rtp_hdr points to the resulting SRTCP packet and + * *len_ptr is the number of octets in that packet; otherwise, no + * assumptions should be made about the value of either data elements. + * + * @warning This function assumes that it can write the authentication + * tag into the location in memory immediately following the RTCP + * packet, and assumes that the RTCP packet is aligned on a 32-bit + * boundary. + * + * @warning This function assumes that it can write SRTP_MAX_TRAILER_LEN+4 + * into the location in memory immediately following the RTCP packet. + * Callers MUST ensure that this much writable memory is available in + * the buffer that holds the RTCP packet. + * + * @param ctx is the SRTP context to use in processing the packet. + * + * @param rtcp_hdr is a pointer to the RTCP packet (before the call); after + * the function returns, it points to the srtp packet. + * + * @param pkt_octet_len is a pointer to the length in octets of the + * complete RTCP packet (header and body) before the function call, + * and of the complete SRTCP packet after the call, if srtp_err_status_ok + * was returned. Otherwise, the value of the data to which it points + * is undefined. + * + * @return + * - srtp_err_status_ok if there were no problems. + * - [other] if there was a failure in + * the cryptographic mechanisms. + */ +srtp_err_status_t srtp_protect_rtcp(srtp_t ctx, + void *rtcp_hdr, + int *pkt_octet_len); + +/** + * @brief srtp_protect_rtcp_mki() is the Secure RTCP sender-side packet + * processing function that can utilize mki. + * + * The function call srtp_protect_rtcp(ctx, rtp_hdr, len_ptr) applies + * SRTCP protection to the RTCP packet rtcp_hdr (which has length + * *len_ptr) using the SRTP session context ctx. If srtp_err_status_ok is + * returned, then rtp_hdr points to the resulting SRTCP packet and + * *len_ptr is the number of octets in that packet; otherwise, no + * assumptions should be made about the value of either data elements. + * + * @warning This function assumes that it can write the authentication + * tag into the location in memory immediately following the RTCP + * packet, and assumes that the RTCP packet is aligned on a 32-bit + * boundary. + * + * @warning This function assumes that it can write SRTP_MAX_TRAILER_LEN+4 + * into the location in memory immediately following the RTCP packet. + * Callers MUST ensure that this much writable memory is available in + * the buffer that holds the RTCP packet. + * + * @param ctx is the SRTP context to use in processing the packet. + * + * @param rtcp_hdr is a pointer to the RTCP packet (before the call); after + * the function returns, it points to the srtp packet. + * + * @param pkt_octet_len is a pointer to the length in octets of the + * complete RTCP packet (header and body) before the function call, + * and of the complete SRTCP packet after the call, if srtp_err_status_ok + * was returned. Otherwise, the value of the data to which it points + * is undefined. + * + * @param use_mki is a boolean to tell the system if mki is being used. If + * set to false then will use the first set of session keys. If set to true + * will + * use the session keys identified by the mki_index + * + * @param mki_index integer value specifying which set of session keys should be + * used if use_mki is set to true. + * + * @return + * - srtp_err_status_ok if there were no problems. + * - [other] if there was a failure in + * the cryptographic mechanisms. + */ +srtp_err_status_t srtp_protect_rtcp_mki(srtp_t ctx, + void *rtcp_hdr, + int *pkt_octet_len, + unsigned int use_mki, + unsigned int mki_index); + +/** + * @brief srtp_unprotect_rtcp() is the Secure RTCP receiver-side packet + * processing function. + * + * The function call srtp_unprotect_rtcp(ctx, srtp_hdr, len_ptr) + * verifies the Secure RTCP protection of the SRTCP packet pointed to + * by srtcp_hdr (which has length *len_ptr), using the SRTP session + * context ctx. If srtp_err_status_ok is returned, then srtcp_hdr points + * to the resulting RTCP packet and *len_ptr is the number of octets + * in that packet; otherwise, no assumptions should be made about the + * value of either data elements. + * + * @warning This function assumes that the SRTCP packet is aligned on a + * 32-bit boundary. + * + * @param ctx is a pointer to the srtp_t which applies to the + * particular packet. + * + * @param srtcp_hdr is a pointer to the header of the SRTCP packet + * (before the call). After the function returns, it points to the + * rtp packet if srtp_err_status_ok was returned; otherwise, the value of + * the data to which it points is undefined. + * + * @param pkt_octet_len is a pointer to the length in octets of the + * complete SRTCP packet (header and body) before the function call, + * and of the complete rtp packet after the call, if srtp_err_status_ok was + * returned. Otherwise, the value of the data to which it points is + * undefined. + * + * @return + * - srtp_err_status_ok if the RTCP packet is valid. + * - srtp_err_status_auth_fail if the SRTCP packet failed the message + * authentication check. + * - srtp_err_status_replay_fail if the SRTCP packet is a replay (e.g. has + * already been processed and accepted). + * - [other] if there has been an error in the cryptographic mechanisms. + * + */ +srtp_err_status_t srtp_unprotect_rtcp(srtp_t ctx, + void *srtcp_hdr, + int *pkt_octet_len); + +/** + * @brief srtp_unprotect_rtcp() is the Secure RTCP receiver-side packet + * processing function. + * + * The function call srtp_unprotect_rtcp(ctx, srtp_hdr, len_ptr) + * verifies the Secure RTCP protection of the SRTCP packet pointed to + * by srtcp_hdr (which has length *len_ptr), using the SRTP session + * context ctx. If srtp_err_status_ok is returned, then srtcp_hdr points + * to the resulting RTCP packet and *len_ptr is the number of octets + * in that packet; otherwise, no assumptions should be made about the + * value of either data elements. + * + * @warning This function assumes that the SRTCP packet is aligned on a + * 32-bit boundary. + * + * @param ctx is a pointer to the srtp_t which applies to the + * particular packet. + * + * @param srtcp_hdr is a pointer to the header of the SRTCP packet + * (before the call). After the function returns, it points to the + * rtp packet if srtp_err_status_ok was returned; otherwise, the value of + * the data to which it points is undefined. + * + * @param pkt_octet_len is a pointer to the length in octets of the + * complete SRTCP packet (header and body) before the function call, + * and of the complete rtp packet after the call, if srtp_err_status_ok was + * returned. Otherwise, the value of the data to which it points is + * undefined. + * + * @param use_mki is a boolean to tell the system if mki is being used. If + * set to false then will use the first set of session keys. If set to true + * will use the session keys identified by the mki_index + * + * @return + * - srtp_err_status_ok if the RTCP packet is valid. + * - srtp_err_status_auth_fail if the SRTCP packet failed the message + * authentication check. + * - srtp_err_status_replay_fail if the SRTCP packet is a replay (e.g. has + * already been processed and accepted). + * - srtp_err_status_bad_mki if the MKI in the packet is not a known MKI + * id + * - [other] if there has been an error in the + * cryptographic mechanisms. + * + */ +srtp_err_status_t srtp_unprotect_rtcp_mki(srtp_t ctx, + void *srtcp_hdr, + int *pkt_octet_len, + unsigned int use_mki); + +/** + * @} + */ + +/** + * @defgroup User data associated to a SRTP session. + * @ingroup SRTP + * + * @brief Store custom user data within a SRTP session. + * + * @{ + */ + +/** + * @brief srtp_set_user_data() stores the given pointer into the SRTP + * session for later retrieval. + * + * @param ctx is the srtp_t context in which the given data pointer is + * stored. + * + * @param data is a pointer to the custom information (struct, function, + * etc) associated with the SRTP session. + * + * @return void. + * + */ +void srtp_set_user_data(srtp_t ctx, void *data); + +/** + * @brief srtp_get_user_data() retrieves the pointer to the custom data + * previously stored with srtp_set_user_data(). + * + * This function is mostly useful for retrieving data associated to a + * SRTP session when an event fires. The user can then get such a custom + * data by calling this function with the session field of the + * srtp_event_data_t struct as argument. + * + * @param ctx is the srtp_t context in which the given data pointer was + * stored. + * + * @return void* pointer to the user data. + * + */ +void *srtp_get_user_data(srtp_t ctx); + +/** + * @} + */ + +/** + * @defgroup SRTPevents SRTP events and callbacks + * @ingroup SRTP + * + * @brief libSRTP can use a user-provided callback function to + * handle events. + * + * + * libSRTP allows a user to provide a callback function to handle + * events that need to be dealt with outside of the data plane (see + * the enum srtp_event_t for a description of these events). Dealing + * with these events is not a strict necessity; they are not + * security-critical, but the application may suffer if they are not + * handled. The function srtp_set_event_handler() is used to provide + * the callback function. + * + * A default event handler that merely reports on the events as they + * happen is included. It is also possible to set the event handler + * function to NULL, in which case all events will just be silently + * ignored. + * + * @{ + */ + +/** + * @brief srtp_event_t defines events that need to be handled + * + * The enum srtp_event_t defines events that need to be handled + * outside the `data plane', such as SSRC collisions and + * key expirations. + * + * When a key expires or the maximum number of packets has been + * reached, an SRTP stream will enter an `expired' state in which no + * more packets can be protected or unprotected. When this happens, + * it is likely that you will want to either deallocate the stream + * (using srtp_remove_stream()), and possibly allocate a new one. + * + * When an SRTP stream expires, the other streams in the same session + * are unaffected, unless key sharing is used by that stream. In the + * latter case, all of the streams in the session will expire. + */ +typedef enum { + event_ssrc_collision, /**< An SSRC collision occurred. */ + event_key_soft_limit, /**< An SRTP stream reached the soft key */ + /**< usage limit and will expire soon. */ + event_key_hard_limit, /**< An SRTP stream reached the hard */ + /**< key usage limit and has expired. */ + event_packet_index_limit /**< An SRTP stream reached the hard */ + /**< packet limit (2^48 packets). */ +} srtp_event_t; + +/** + * @brief srtp_event_data_t is the structure passed as a callback to + * the event handler function + * + * The struct srtp_event_data_t holds the data passed to the event + * handler function. + */ +typedef struct srtp_event_data_t { + srtp_t session; /**< The session in which the event happened. */ + uint32_t ssrc; /**< The ssrc in host order of the stream in which */ + /**< the event happened */ + srtp_event_t event; /**< An enum indicating the type of event. */ +} srtp_event_data_t; + +/** + * @brief srtp_event_handler_func_t is the function prototype for + * the event handler. + * + * The typedef srtp_event_handler_func_t is the prototype for the + * event handler function. It has as its only argument an + * srtp_event_data_t which describes the event that needs to be handled. + * There can only be a single, global handler for all events in + * libSRTP. + */ +typedef void(srtp_event_handler_func_t)(srtp_event_data_t *data); + +/** + * @brief sets the event handler to the function supplied by the caller. + * + * The function call srtp_install_event_handler(func) sets the event + * handler function to the value func. The value NULL is acceptable + * as an argument; in this case, events will be ignored rather than + * handled. + * + * @param func is a pointer to a function that takes an srtp_event_data_t + * pointer as an argument and returns void. This function + * will be used by libSRTP to handle events. + */ +srtp_err_status_t srtp_install_event_handler(srtp_event_handler_func_t func); + +/** + * @brief Returns the version string of the library. + * + */ +const char *srtp_get_version_string(void); + +/** + * @brief Returns the numeric representation of the library version. + * + */ +unsigned int srtp_get_version(void); + +/** + * @brief srtp_set_debug_module(mod_name, v) + * + * sets dynamic debugging to the value v (0 for off, 1 for on) for the + * debug module with the name mod_name + * + * returns err_status_ok on success, err_status_fail otherwise + */ +srtp_err_status_t srtp_set_debug_module(const char *mod_name, int v); + +/** + * @brief srtp_list_debug_modules() outputs a list of debugging modules + * + */ +srtp_err_status_t srtp_list_debug_modules(void); + +/** + * @brief srtp_log_level_t defines log levels. + * + * The enumeration srtp_log_level_t defines log levels reported + * in the srtp_log_handler_func_t. + * + */ +typedef enum { + srtp_log_level_error, /**< log level is reporting an error message */ + srtp_log_level_warning, /**< log level is reporting a warning message */ + srtp_log_level_info, /**< log level is reporting an info message */ + srtp_log_level_debug /**< log level is reporting a debug message */ +} srtp_log_level_t; + +/** + * @brief srtp_log_handler_func_t is the function prototype for + * the log handler. + * + * The typedef srtp_event_handler_func_t is the prototype for the + * event handler function. It has as srtp_log_level_t, log + * message and data as arguments. + * There can only be a single, global handler for all log messages in + * libSRTP. + */ +typedef void(srtp_log_handler_func_t)(srtp_log_level_t level, + const char *msg, + void *data); + +/** + * @brief sets the log handler to the function supplied by the caller. + * + * The function call srtp_install_log_handler(func) sets the log + * handler function to the value func. The value NULL is acceptable + * as an argument; in this case, log messages will be ignored. + * This function can be called before srtp_init() in order to capture + * any logging during start up. + * + * @param func is a pointer to a function of type srtp_log_handler_func_t. + * This function will be used by libSRTP to output log messages. + * @param data is a user pointer that will be returned as the data argument in + * func. + */ +srtp_err_status_t srtp_install_log_handler(srtp_log_handler_func_t func, + void *data); + +/** + * @brief srtp_get_protect_trailer_length(session, use_mki, mki_index, length) + * + * Determines the length of the amount of data Lib SRTP will add to the + * packet during the protect process. The length is returned in the length + * parameter + * + * returns err_status_ok on success, err_status_bad_mki if the MKI index is + * invalid + * + */ +srtp_err_status_t srtp_get_protect_trailer_length(srtp_t session, + uint32_t use_mki, + uint32_t mki_index, + uint32_t *length); + +/** + * @brief srtp_get_protect_rtcp_trailer_length(session, use_mki, mki_index, + * length) + * + * Determines the length of the amount of data Lib SRTP will add to the + * packet during the protect process. The length is returned in the length + * parameter + * + * returns err_status_ok on success, err_status_bad_mki if the MKI index is + * invalid + * + */ +srtp_err_status_t srtp_get_protect_rtcp_trailer_length(srtp_t session, + uint32_t use_mki, + uint32_t mki_index, + uint32_t *length); + +/** + * @brief srtp_set_stream_roc(session, ssrc, roc) + * + * Set the roll-over-counter on a session for a given SSRC + * + * returns err_status_ok on success, srtp_err_status_bad_param if there is no + * stream found + * + */ +srtp_err_status_t srtp_set_stream_roc(srtp_t session, + uint32_t ssrc, + uint32_t roc); + +/** + * @brief srtp_get_stream_roc(session, ssrc, roc) + * + * Get the roll-over-counter on a session for a given SSRC + * + * returns err_status_ok on success, srtp_err_status_bad_param if there is no + * stream found + * + */ +srtp_err_status_t srtp_get_stream_roc(srtp_t session, + uint32_t ssrc, + uint32_t *roc); + +/** + * @} + */ + +/* in host order, so outside the #if */ +#define SRTCP_E_BIT 0x80000000 + +/* for byte-access */ +#define SRTCP_E_BYTE_BIT 0x80 +#define SRTCP_INDEX_MASK 0x7fffffff + +#ifdef __cplusplus +} +#endif + +#endif /* SRTP_SRTP_H */ diff --git a/third_party/libsrtp/src/include/srtp2/meson.build b/third_party/libsrtp/src/include/srtp2/meson.build new file mode 100644 index 0000000000..88d068a338 --- /dev/null +++ b/third_party/libsrtp/src/include/srtp2/meson.build @@ -0,0 +1,8 @@ +# Copy public headers scattered across the source tree into a single directory +# so that we can use it in declare_dependency() +foreach h : public_headers + configure_file(input: h, + output: '@BASENAME@.h', + copy: true) +endforeach +public_incs = include_directories('.') diff --git a/third_party/libsrtp/src/include/srtp_priv.h b/third_party/libsrtp/src/include/srtp_priv.h new file mode 100644 index 0000000000..48dc65c7d8 --- /dev/null +++ b/third_party/libsrtp/src/include/srtp_priv.h @@ -0,0 +1,278 @@ +/* + * srtp_priv.h + * + * private internal data structures and functions for libSRTP + * + * David A. McGrew + * Cisco Systems, Inc. + */ +/* + * + * Copyright (c) 2001-2017 Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef SRTP_PRIV_H +#define SRTP_PRIV_H + +// Leave this as the top level import. Ensures the existence of defines +#include "config.h" + +#include "srtp.h" +#include "rdbx.h" +#include "rdb.h" +#include "integers.h" +#include "cipher.h" +#include "auth.h" +#include "aes.h" +#include "crypto_kernel.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define SRTP_VER_STRING PACKAGE_STRING +#define SRTP_VERSION PACKAGE_VERSION + +typedef struct srtp_stream_ctx_t_ srtp_stream_ctx_t; +typedef srtp_stream_ctx_t *srtp_stream_t; + +/* + * the following declarations are libSRTP internal functions + */ + +/* + * srtp_get_stream(ssrc) returns a pointer to the stream corresponding + * to ssrc, or NULL if no stream exists for that ssrc + */ +srtp_stream_t srtp_get_stream(srtp_t srtp, uint32_t ssrc); + +/* + * srtp_stream_init_keys(s, k) (re)initializes the srtp_stream_t s by + * deriving all of the needed keys using the KDF and the key k. + */ +srtp_err_status_t srtp_stream_init_keys(srtp_stream_ctx_t *srtp, + srtp_master_key_t *master_key, + const unsigned int current_mki_index); + +/* + * srtp_stream_init_all_master_keys(s, k, m) (re)initializes the srtp_stream_t s + * by deriving all of the needed keys for all the master keys using the KDF and + * the keys from k. + */ +srtp_err_status_t srtp_steam_init_all_master_keys( + srtp_stream_ctx_t *srtp, + unsigned char *key, + srtp_master_key_t **keys, + const unsigned int max_master_keys); + +/* + * srtp_stream_init(s, p) initializes the srtp_stream_t s to + * use the policy at the location p + */ +srtp_err_status_t srtp_stream_init(srtp_stream_t srtp, const srtp_policy_t *p); + +/* + * libsrtp internal datatypes + */ +typedef enum direction_t { + dir_unknown = 0, + dir_srtp_sender = 1, + dir_srtp_receiver = 2 +} direction_t; + +/* + * srtp_session_keys_t will contain the encryption, hmac, salt keys + * for both SRTP and SRTCP. The session keys will also contain the + * MKI ID which is used to identify the session keys. + */ +typedef struct srtp_session_keys_t { + srtp_cipher_t *rtp_cipher; + srtp_cipher_t *rtp_xtn_hdr_cipher; + srtp_auth_t *rtp_auth; + srtp_cipher_t *rtcp_cipher; + srtp_auth_t *rtcp_auth; + uint8_t salt[SRTP_AEAD_SALT_LEN]; + uint8_t c_salt[SRTP_AEAD_SALT_LEN]; + uint8_t *mki_id; + unsigned int mki_size; + srtp_key_limit_ctx_t *limit; +} srtp_session_keys_t; + +/* + * an srtp_stream_t has its own SSRC, encryption key, authentication + * key, sequence number, and replay database + * + * note that the keys might not actually be unique, in which case the + * srtp_cipher_t and srtp_auth_t pointers will point to the same structures + */ +typedef struct srtp_stream_ctx_t_ { + uint32_t ssrc; + srtp_session_keys_t *session_keys; + unsigned int num_master_keys; + srtp_rdbx_t rtp_rdbx; + srtp_sec_serv_t rtp_services; + srtp_rdb_t rtcp_rdb; + srtp_sec_serv_t rtcp_services; + direction_t direction; + int allow_repeat_tx; + int *enc_xtn_hdr; + int enc_xtn_hdr_count; + uint32_t pending_roc; + struct srtp_stream_ctx_t_ *next; /* linked list of streams */ +} strp_stream_ctx_t_; + +/* + * an srtp_ctx_t holds a stream list and a service description + */ +typedef struct srtp_ctx_t_ { + struct srtp_stream_ctx_t_ *stream_list; /* linked list of streams */ + struct srtp_stream_ctx_t_ *stream_template; /* act as template for other */ + /* streams */ + void *user_data; /* user custom data */ +} srtp_ctx_t_; + +/* + * srtp_hdr_t represents an RTP or SRTP header. The bit-fields in + * this structure should be declared "unsigned int" instead of + * "unsigned char", but doing so causes the MS compiler to not + * fully pack the bit fields. + * + * In this implementation, an srtp_hdr_t is assumed to be 32-bit aligned + * + * (note that this definition follows that of RFC 1889 Appendix A, but + * is not identical) + */ + +#ifndef WORDS_BIGENDIAN + +typedef struct { + unsigned char cc : 4; /* CSRC count */ + unsigned char x : 1; /* header extension flag */ + unsigned char p : 1; /* padding flag */ + unsigned char version : 2; /* protocol version */ + unsigned char pt : 7; /* payload type */ + unsigned char m : 1; /* marker bit */ + uint16_t seq; /* sequence number */ + uint32_t ts; /* timestamp */ + uint32_t ssrc; /* synchronization source */ +} srtp_hdr_t; + +#else /* BIG_ENDIAN */ + +typedef struct { + unsigned char version : 2; /* protocol version */ + unsigned char p : 1; /* padding flag */ + unsigned char x : 1; /* header extension flag */ + unsigned char cc : 4; /* CSRC count */ + unsigned char m : 1; /* marker bit */ + unsigned char pt : 7; /* payload type */ + uint16_t seq; /* sequence number */ + uint32_t ts; /* timestamp */ + uint32_t ssrc; /* synchronization source */ +} srtp_hdr_t; + +#endif + +typedef struct { + uint16_t profile_specific; /* profile-specific info */ + uint16_t length; /* number of 32-bit words in extension */ +} srtp_hdr_xtnd_t; + +/* + * srtcp_hdr_t represents a secure rtcp header + * + * in this implementation, an srtcp header is assumed to be 32-bit + * aligned + */ + +#ifndef WORDS_BIGENDIAN + +typedef struct { + unsigned char rc : 5; /* reception report count */ + unsigned char p : 1; /* padding flag */ + unsigned char version : 2; /* protocol version */ + unsigned char pt : 8; /* payload type */ + uint16_t len; /* length */ + uint32_t ssrc; /* synchronization source */ +} srtcp_hdr_t; + +typedef struct { + unsigned int index : 31; /* srtcp packet index in network order! */ + unsigned int e : 1; /* encrypted? 1=yes */ + /* optional mikey/etc go here */ + /* and then the variable-length auth tag */ +} srtcp_trailer_t; + +#else /* BIG_ENDIAN */ + +typedef struct { + unsigned char version : 2; /* protocol version */ + unsigned char p : 1; /* padding flag */ + unsigned char rc : 5; /* reception report count */ + unsigned char pt : 8; /* payload type */ + uint16_t len; /* length */ + uint32_t ssrc; /* synchronization source */ +} srtcp_hdr_t; + +typedef struct { + unsigned int e : 1; /* encrypted? 1=yes */ + unsigned int index : 31; /* srtcp packet index */ + /* optional mikey/etc go here */ + /* and then the variable-length auth tag */ +} srtcp_trailer_t; + +#endif + +/* + * srtp_handle_event(srtp, srtm, evnt) calls the event handling + * function, if there is one. + * + * This macro is not included in the documentation as it is + * an internal-only function. + */ + +#define srtp_handle_event(srtp, strm, evnt) \ + if (srtp_event_handler) { \ + srtp_event_data_t data; \ + data.session = srtp; \ + data.ssrc = ntohl(strm->ssrc); \ + data.event = evnt; \ + srtp_event_handler(&data); \ + } + +#ifdef __cplusplus +} +#endif + +#endif /* SRTP_PRIV_H */ diff --git a/third_party/libsrtp/src/moz.build b/third_party/libsrtp/src/moz.build new file mode 100644 index 0000000000..e145c63350 --- /dev/null +++ b/third_party/libsrtp/src/moz.build @@ -0,0 +1,77 @@ +# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*- +# vim: set filetype=python: +# This Source Code Form is subject to the terms of the Mozilla Public +# License, v. 2.0. If a copy of the MPL was not distributed with this +# file, You can obtain one at http://mozilla.org/MPL/2.0/. + +# we don't use mbedtls + +UNIFIED_SOURCES += [ + 'crypto/cipher/aes_gcm_nss.c', + 'crypto/cipher/aes_icm_nss.c', + 'crypto/cipher/cipher.c', + 'crypto/cipher/cipher_test_cases.c', + 'crypto/cipher/null_cipher.c', + 'crypto/hash/auth.c', + 'crypto/hash/auth_test_cases.c', + 'crypto/hash/hmac.c', + 'crypto/hash/null_auth.c', + 'crypto/hash/sha1.c', + 'crypto/kernel/alloc.c', + 'crypto/kernel/crypto_kernel.c', + 'crypto/kernel/err.c', + 'crypto/kernel/key.c', + 'crypto/math/datatypes.c', + 'crypto/replay/rdb.c', + 'crypto/replay/rdbx.c', + 'srtp/srtp.c', +] + +Library('nksrtp_s') + +include('/ipc/chromium/chromium-config.mozbuild') + +FINAL_LIBRARY = 'xul' + +LOCAL_INCLUDES += [ + 'crypto/include', + 'include', +] + +DEFINES['PACKAGE_STRING'] = '"libsrtp2 2.2.0-pre"' +DEFINES['PACKAGE_VERSION'] = '"2.2.0-pre"' + +# This is needed to enable the be32_to_cpu and be64_to_cpu +# macro's in datatypes.h +DEFINES['HAVE_CONFIG_H'] = 1 + +# We know stdint.h will define uint8/16/32/64_t, so we don't need +# to define SIZEOF_UNSIGNED_LONG/SIZEOF_UNSIGNED_LONG_LONG +for var in ('HAVE_STDLIB_H', 'HAVE_UINT8_T', 'HAVE_UINT16_T', + 'HAVE_INT32_T', 'HAVE_UINT32_T', 'HAVE_UINT64_T'): + DEFINES[var] = 1 + +# Enable AES-GCM cipher suite in libsrtp +DEFINES['GCM'] = 1 +# Let libsrtp use NSS instead of build-in crypto +DEFINES['NSS'] = 1 + +# XXX while arm is not a CISC architecture, the code guarded by CPU_RISC makes +# (at least) the AES ciphers fail their self-tests on ARM, so for now we're +# falling back to the (presumably) slower-on-this-architecture but working +# code path. https://bugzilla.mozilla.org/show_bug.cgi?id=822380 has been filed +# to make the right and more performant fix and push it back upstream. +if CONFIG['CPU_ARCH'] in ('arm', 'x86', 'x86_64', 'mips', 'mips64'): + DEFINES['CPU_CISC'] = 1 +else: + # best guess + DEFINES['CPU_RISC'] = 1 + +if CONFIG['CPU_ARCH'] in ('x86', 'x86_64'): + DEFINES['HAVE_X86'] = True + +if CONFIG['OS_TARGET'] == 'WINNT': + DEFINES['HAVE_WINSOCK2_H'] = True + DEFINES['inline'] = '__inline' +else: + DEFINES['HAVE_NETINET_IN_H'] = 1 diff --git a/third_party/libsrtp/src/srtp/srtp.c b/third_party/libsrtp/src/srtp/srtp.c new file mode 100644 index 0000000000..fc0b1b0ad1 --- /dev/null +++ b/third_party/libsrtp/src/srtp/srtp.c @@ -0,0 +1,4723 @@ +/* + * srtp.c + * + * the secure real-time transport protocol + * + * David A. McGrew + * Cisco Systems, Inc. + */ +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +// Leave this as the top level import. Ensures the existence of defines +#include "config.h" + +#include "srtp_priv.h" +#include "crypto_types.h" +#include "err.h" +#include "alloc.h" /* for srtp_crypto_alloc() */ + +#ifdef GCM +#include "aes_gcm.h" /* for AES GCM mode */ +#endif + +#ifdef OPENSSL_KDF +#include <openssl/kdf.h> +#include "aes_icm_ext.h" +#endif + +#include <limits.h> +#ifdef HAVE_NETINET_IN_H +#include <netinet/in.h> +#elif defined(HAVE_WINSOCK2_H) +#include <winsock2.h> +#endif + +/* the debug module for srtp */ +srtp_debug_module_t mod_srtp = { + 0, /* debugging is off by default */ + "srtp" /* printable name for module */ +}; + +#define octets_in_rtp_header 12 +#define uint32s_in_rtp_header 3 +#define octets_in_rtcp_header 8 +#define uint32s_in_rtcp_header 2 +#define octets_in_rtp_extn_hdr 4 + +static srtp_err_status_t srtp_validate_rtp_header(void *rtp_hdr, + int *pkt_octet_len) +{ + srtp_hdr_t *hdr = (srtp_hdr_t *)rtp_hdr; + int rtp_header_len; + + if (*pkt_octet_len < octets_in_rtp_header) + return srtp_err_status_bad_param; + + /* Check RTP header length */ + rtp_header_len = octets_in_rtp_header + 4 * hdr->cc; + if (hdr->x == 1) + rtp_header_len += octets_in_rtp_extn_hdr; + + if (*pkt_octet_len < rtp_header_len) + return srtp_err_status_bad_param; + + /* Verifing profile length. */ + if (hdr->x == 1) { + srtp_hdr_xtnd_t *xtn_hdr = + (srtp_hdr_xtnd_t *)((uint32_t *)hdr + uint32s_in_rtp_header + + hdr->cc); + int profile_len = ntohs(xtn_hdr->length); + rtp_header_len += profile_len * 4; + /* profile length counts the number of 32-bit words */ + if (*pkt_octet_len < rtp_header_len) + return srtp_err_status_bad_param; + } + return srtp_err_status_ok; +} + +const char *srtp_get_version_string() +{ + /* + * Simply return the autotools generated string + */ + return SRTP_VER_STRING; +} + +unsigned int srtp_get_version() +{ + unsigned int major = 0, minor = 0, micro = 0; + unsigned int rv = 0; + int parse_rv; + + /* + * Parse the autotools generated version + */ + parse_rv = sscanf(SRTP_VERSION, "%u.%u.%u", &major, &minor, µ); + if (parse_rv != 3) { + /* + * We're expected to parse all 3 version levels. + * If not, then this must not be an official release. + * Return all zeros on the version + */ + return (0); + } + + /* + * We allow 8 bits for the major and minor, while + * allowing 16 bits for the micro. 16 bits for the micro + * may be beneficial for a continuous delivery model + * in the future. + */ + rv |= (major & 0xFF) << 24; + rv |= (minor & 0xFF) << 16; + rv |= micro & 0xFF; + return rv; +} + +srtp_err_status_t srtp_stream_dealloc(srtp_stream_ctx_t *stream, + const srtp_stream_ctx_t *stream_template) +{ + srtp_err_status_t status; + unsigned int i = 0; + srtp_session_keys_t *session_keys = NULL; + srtp_session_keys_t *template_session_keys = NULL; + + /* + * we use a conservative deallocation strategy - if any deallocation + * fails, then we report that fact without trying to deallocate + * anything else + */ + if (stream->session_keys) { + for (i = 0; i < stream->num_master_keys; i++) { + session_keys = &stream->session_keys[i]; + + if (stream_template && + stream->num_master_keys == stream_template->num_master_keys) { + template_session_keys = &stream_template->session_keys[i]; + } else { + template_session_keys = NULL; + } + + /* + * deallocate cipher, if it is not the same as that in template + */ + if (template_session_keys && + session_keys->rtp_cipher == template_session_keys->rtp_cipher) { + /* do nothing */ + } else if (session_keys->rtp_cipher) { + status = srtp_cipher_dealloc(session_keys->rtp_cipher); + if (status) + return status; + } + + /* + * deallocate auth function, if it is not the same as that in + * template + */ + if (template_session_keys && + session_keys->rtp_auth == template_session_keys->rtp_auth) { + /* do nothing */ + } else if (session_keys->rtp_auth) { + status = srtp_auth_dealloc(session_keys->rtp_auth); + if (status) + return status; + } + + if (template_session_keys && + session_keys->rtp_xtn_hdr_cipher == + template_session_keys->rtp_xtn_hdr_cipher) { + /* do nothing */ + } else if (session_keys->rtp_xtn_hdr_cipher) { + status = srtp_cipher_dealloc(session_keys->rtp_xtn_hdr_cipher); + if (status) + return status; + } + + /* + * deallocate rtcp cipher, if it is not the same as that in + * template + */ + if (template_session_keys && + session_keys->rtcp_cipher == + template_session_keys->rtcp_cipher) { + /* do nothing */ + } else if (session_keys->rtcp_cipher) { + status = srtp_cipher_dealloc(session_keys->rtcp_cipher); + if (status) + return status; + } + + /* + * deallocate rtcp auth function, if it is not the same as that in + * template + */ + if (template_session_keys && + session_keys->rtcp_auth == template_session_keys->rtcp_auth) { + /* do nothing */ + } else if (session_keys->rtcp_auth) { + status = srtp_auth_dealloc(session_keys->rtcp_auth); + if (status) + return status; + } + + /* + * zeroize the salt value + */ + octet_string_set_to_zero(session_keys->salt, SRTP_AEAD_SALT_LEN); + octet_string_set_to_zero(session_keys->c_salt, SRTP_AEAD_SALT_LEN); + + if (session_keys->mki_id) { + octet_string_set_to_zero(session_keys->mki_id, + session_keys->mki_size); + srtp_crypto_free(session_keys->mki_id); + session_keys->mki_id = NULL; + } + + /* + * deallocate key usage limit, if it is not the same as that in + * template + */ + if (template_session_keys && + session_keys->limit == template_session_keys->limit) { + /* do nothing */ + } else if (session_keys->limit) { + srtp_crypto_free(session_keys->limit); + } + } + srtp_crypto_free(stream->session_keys); + } + + status = srtp_rdbx_dealloc(&stream->rtp_rdbx); + if (status) + return status; + + if (stream_template && + stream->enc_xtn_hdr == stream_template->enc_xtn_hdr) { + /* do nothing */ + } else if (stream->enc_xtn_hdr) { + srtp_crypto_free(stream->enc_xtn_hdr); + } + + /* deallocate srtp stream context */ + srtp_crypto_free(stream); + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_valid_policy(const srtp_policy_t *p) +{ + if (p != NULL && p->deprecated_ekt != NULL) { + return srtp_err_status_bad_param; + } + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_stream_alloc(srtp_stream_ctx_t **str_ptr, + const srtp_policy_t *p) +{ + srtp_stream_ctx_t *str; + srtp_err_status_t stat; + unsigned int i = 0; + srtp_session_keys_t *session_keys = NULL; + + stat = srtp_valid_policy(p); + if (stat != srtp_err_status_ok) { + return stat; + } + + /* + * This function allocates the stream context, rtp and rtcp ciphers + * and auth functions, and key limit structure. If there is a + * failure during allocation, we free all previously allocated + * memory and return a failure code. The code could probably + * be improved, but it works and should be clear. + */ + + /* allocate srtp stream and set str_ptr */ + str = (srtp_stream_ctx_t *)srtp_crypto_alloc(sizeof(srtp_stream_ctx_t)); + if (str == NULL) + return srtp_err_status_alloc_fail; + + *str_ptr = str; + + /* + *To keep backwards API compatible if someone is using multiple master + * keys then key should be set to NULL + */ + if (p->key != NULL) { + str->num_master_keys = 1; + } else { + str->num_master_keys = p->num_master_keys; + } + + str->session_keys = (srtp_session_keys_t *)srtp_crypto_alloc( + sizeof(srtp_session_keys_t) * str->num_master_keys); + + if (str->session_keys == NULL) { + srtp_stream_dealloc(str, NULL); + return srtp_err_status_alloc_fail; + } + + for (i = 0; i < str->num_master_keys; i++) { + session_keys = &str->session_keys[i]; + + /* allocate cipher */ + stat = srtp_crypto_kernel_alloc_cipher( + p->rtp.cipher_type, &session_keys->rtp_cipher, + p->rtp.cipher_key_len, p->rtp.auth_tag_len); + if (stat) { + srtp_stream_dealloc(str, NULL); + return stat; + } + + /* allocate auth function */ + stat = srtp_crypto_kernel_alloc_auth( + p->rtp.auth_type, &session_keys->rtp_auth, p->rtp.auth_key_len, + p->rtp.auth_tag_len); + if (stat) { + srtp_stream_dealloc(str, NULL); + return stat; + } + + /* + * ...and now the RTCP-specific initialization - first, allocate + * the cipher + */ + stat = srtp_crypto_kernel_alloc_cipher( + p->rtcp.cipher_type, &session_keys->rtcp_cipher, + p->rtcp.cipher_key_len, p->rtcp.auth_tag_len); + if (stat) { + srtp_stream_dealloc(str, NULL); + return stat; + } + + /* allocate auth function */ + stat = srtp_crypto_kernel_alloc_auth( + p->rtcp.auth_type, &session_keys->rtcp_auth, p->rtcp.auth_key_len, + p->rtcp.auth_tag_len); + if (stat) { + srtp_stream_dealloc(str, NULL); + return stat; + } + + session_keys->mki_id = NULL; + + /* allocate key limit structure */ + session_keys->limit = (srtp_key_limit_ctx_t *)srtp_crypto_alloc( + sizeof(srtp_key_limit_ctx_t)); + if (session_keys->limit == NULL) { + srtp_stream_dealloc(str, NULL); + return srtp_err_status_alloc_fail; + } + } + + if (p->enc_xtn_hdr && p->enc_xtn_hdr_count > 0) { + srtp_cipher_type_id_t enc_xtn_hdr_cipher_type; + int enc_xtn_hdr_cipher_key_len; + + str->enc_xtn_hdr = (int *)srtp_crypto_alloc(p->enc_xtn_hdr_count * + sizeof(p->enc_xtn_hdr[0])); + if (!str->enc_xtn_hdr) { + srtp_stream_dealloc(str, NULL); + return srtp_err_status_alloc_fail; + } + memcpy(str->enc_xtn_hdr, p->enc_xtn_hdr, + p->enc_xtn_hdr_count * sizeof(p->enc_xtn_hdr[0])); + str->enc_xtn_hdr_count = p->enc_xtn_hdr_count; + + /* + * For GCM ciphers, the corresponding ICM cipher is used for header + * extensions encryption. + */ + switch (p->rtp.cipher_type) { + case SRTP_AES_GCM_128: + enc_xtn_hdr_cipher_type = SRTP_AES_ICM_128; + enc_xtn_hdr_cipher_key_len = SRTP_AES_ICM_128_KEY_LEN_WSALT; + break; + case SRTP_AES_GCM_256: + enc_xtn_hdr_cipher_type = SRTP_AES_ICM_256; + enc_xtn_hdr_cipher_key_len = SRTP_AES_ICM_256_KEY_LEN_WSALT; + break; + default: + enc_xtn_hdr_cipher_type = p->rtp.cipher_type; + enc_xtn_hdr_cipher_key_len = p->rtp.cipher_key_len; + break; + } + + for (i = 0; i < str->num_master_keys; i++) { + session_keys = &str->session_keys[i]; + + /* allocate cipher for extensions header encryption */ + stat = srtp_crypto_kernel_alloc_cipher( + enc_xtn_hdr_cipher_type, &session_keys->rtp_xtn_hdr_cipher, + enc_xtn_hdr_cipher_key_len, 0); + if (stat) { + srtp_stream_dealloc(str, NULL); + return stat; + } + } + } else { + for (i = 0; i < str->num_master_keys; i++) { + session_keys = &str->session_keys[i]; + session_keys->rtp_xtn_hdr_cipher = NULL; + } + + str->enc_xtn_hdr = NULL; + str->enc_xtn_hdr_count = 0; + } + + return srtp_err_status_ok; +} + +/* + * srtp_stream_clone(stream_template, new) allocates a new stream and + * initializes it using the cipher and auth of the stream_template + * + * the only unique data in a cloned stream is the replay database and + * the SSRC + */ + +srtp_err_status_t srtp_stream_clone(const srtp_stream_ctx_t *stream_template, + uint32_t ssrc, + srtp_stream_ctx_t **str_ptr) +{ + srtp_err_status_t status; + srtp_stream_ctx_t *str; + unsigned int i = 0; + srtp_session_keys_t *session_keys = NULL; + const srtp_session_keys_t *template_session_keys = NULL; + + debug_print(mod_srtp, "cloning stream (SSRC: 0x%08x)", ntohl(ssrc)); + + /* allocate srtp stream and set str_ptr */ + str = (srtp_stream_ctx_t *)srtp_crypto_alloc(sizeof(srtp_stream_ctx_t)); + if (str == NULL) + return srtp_err_status_alloc_fail; + *str_ptr = str; + + str->num_master_keys = stream_template->num_master_keys; + str->session_keys = (srtp_session_keys_t *)srtp_crypto_alloc( + sizeof(srtp_session_keys_t) * str->num_master_keys); + + if (str->session_keys == NULL) { + srtp_stream_dealloc(*str_ptr, stream_template); + *str_ptr = NULL; + return srtp_err_status_alloc_fail; + } + + for (i = 0; i < stream_template->num_master_keys; i++) { + session_keys = &str->session_keys[i]; + template_session_keys = &stream_template->session_keys[i]; + + /* set cipher and auth pointers to those of the template */ + session_keys->rtp_cipher = template_session_keys->rtp_cipher; + session_keys->rtp_auth = template_session_keys->rtp_auth; + session_keys->rtp_xtn_hdr_cipher = + template_session_keys->rtp_xtn_hdr_cipher; + session_keys->rtcp_cipher = template_session_keys->rtcp_cipher; + session_keys->rtcp_auth = template_session_keys->rtcp_auth; + session_keys->mki_size = template_session_keys->mki_size; + + if (template_session_keys->mki_size == 0) { + session_keys->mki_id = NULL; + } else { + session_keys->mki_id = + srtp_crypto_alloc(template_session_keys->mki_size); + + if (session_keys->mki_id == NULL) { + srtp_stream_dealloc(*str_ptr, stream_template); + *str_ptr = NULL; + return srtp_err_status_init_fail; + } + memcpy(session_keys->mki_id, template_session_keys->mki_id, + session_keys->mki_size); + } + /* Copy the salt values */ + memcpy(session_keys->salt, template_session_keys->salt, + SRTP_AEAD_SALT_LEN); + memcpy(session_keys->c_salt, template_session_keys->c_salt, + SRTP_AEAD_SALT_LEN); + + /* set key limit to point to that of the template */ + status = srtp_key_limit_clone(template_session_keys->limit, + &session_keys->limit); + if (status) { + srtp_stream_dealloc(*str_ptr, stream_template); + *str_ptr = NULL; + return status; + } + } + + /* initialize replay databases */ + status = srtp_rdbx_init( + &str->rtp_rdbx, srtp_rdbx_get_window_size(&stream_template->rtp_rdbx)); + if (status) { + srtp_stream_dealloc(*str_ptr, stream_template); + *str_ptr = NULL; + return status; + } + srtp_rdb_init(&str->rtcp_rdb); + str->allow_repeat_tx = stream_template->allow_repeat_tx; + + /* set ssrc to that provided */ + str->ssrc = ssrc; + + /* reset pending ROC */ + str->pending_roc = 0; + + /* set direction and security services */ + str->direction = stream_template->direction; + str->rtp_services = stream_template->rtp_services; + str->rtcp_services = stream_template->rtcp_services; + + /* copy information about extensions header encryption */ + str->enc_xtn_hdr = stream_template->enc_xtn_hdr; + str->enc_xtn_hdr_count = stream_template->enc_xtn_hdr_count; + + /* defensive coding */ + str->next = NULL; + return srtp_err_status_ok; +} + +/* + * key derivation functions, internal to libSRTP + * + * srtp_kdf_t is a key derivation context + * + * srtp_kdf_init(&kdf, cipher_id, k, keylen) initializes kdf to use cipher + * described by cipher_id, with the master key k with length in octets keylen. + * + * srtp_kdf_generate(&kdf, l, kl, keylen) derives the key + * corresponding to label l and puts it into kl; the length + * of the key in octets is provided as keylen. this function + * should be called once for each subkey that is derived. + * + * srtp_kdf_clear(&kdf) zeroizes and deallocates the kdf state + */ + +typedef enum { + label_rtp_encryption = 0x00, + label_rtp_msg_auth = 0x01, + label_rtp_salt = 0x02, + label_rtcp_encryption = 0x03, + label_rtcp_msg_auth = 0x04, + label_rtcp_salt = 0x05, + label_rtp_header_encryption = 0x06, + label_rtp_header_salt = 0x07 +} srtp_prf_label; + +#define MAX_SRTP_KEY_LEN 256 + +#if defined(OPENSSL) && defined(OPENSSL_KDF) +#define MAX_SRTP_AESKEY_LEN 32 +#define MAX_SRTP_SALT_LEN 14 + +/* + * srtp_kdf_t represents a key derivation function. The SRTP + * default KDF is the only one implemented at present. + */ +typedef struct { + uint8_t master_key[MAX_SRTP_AESKEY_LEN]; + uint8_t master_salt[MAX_SRTP_SALT_LEN]; + const EVP_CIPHER *evp; +} srtp_kdf_t; + +static srtp_err_status_t srtp_kdf_init(srtp_kdf_t *kdf, + const uint8_t *key, + int key_len, + int salt_len) +{ + memset(kdf, 0x0, sizeof(srtp_kdf_t)); + + /* The NULL cipher has zero key length */ + if (key_len == 0) + return srtp_err_status_ok; + + if ((key_len > MAX_SRTP_AESKEY_LEN) || (salt_len > MAX_SRTP_SALT_LEN)) { + return srtp_err_status_bad_param; + } + switch (key_len) { + case SRTP_AES_256_KEYSIZE: + kdf->evp = EVP_aes_256_ctr(); + break; + case SRTP_AES_192_KEYSIZE: + kdf->evp = EVP_aes_192_ctr(); + break; + case SRTP_AES_128_KEYSIZE: + kdf->evp = EVP_aes_128_ctr(); + break; + default: + return srtp_err_status_bad_param; + break; + } + memcpy(kdf->master_key, key, key_len); + memcpy(kdf->master_salt, key + key_len, salt_len); + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_kdf_generate(srtp_kdf_t *kdf, + srtp_prf_label label, + uint8_t *key, + unsigned int length) +{ + int ret; + + /* The NULL cipher will not have an EVP */ + if (!kdf->evp) + return srtp_err_status_ok; + octet_string_set_to_zero(key, length); + + /* + * Invoke the OpenSSL SRTP KDF function + * This is useful if OpenSSL is in FIPS mode and FIP + * compliance is required for SRTP. + */ + ret = kdf_srtp(kdf->evp, (char *)&kdf->master_key, + (char *)&kdf->master_salt, NULL, NULL, label, (char *)key); + if (ret == -1) { + return (srtp_err_status_algo_fail); + } + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_kdf_clear(srtp_kdf_t *kdf) +{ + octet_string_set_to_zero(kdf->master_key, MAX_SRTP_AESKEY_LEN); + octet_string_set_to_zero(kdf->master_salt, MAX_SRTP_SALT_LEN); + kdf->evp = NULL; + + return srtp_err_status_ok; +} + +#else /* if OPENSSL_KDF */ + +/* + * srtp_kdf_t represents a key derivation function. The SRTP + * default KDF is the only one implemented at present. + */ +typedef struct { + srtp_cipher_t *cipher; /* cipher used for key derivation */ +} srtp_kdf_t; + +static srtp_err_status_t srtp_kdf_init(srtp_kdf_t *kdf, + const uint8_t *key, + int key_len) +{ + srtp_cipher_type_id_t cipher_id; + srtp_err_status_t stat; + + switch (key_len) { + case SRTP_AES_ICM_256_KEY_LEN_WSALT: + cipher_id = SRTP_AES_ICM_256; + break; + case SRTP_AES_ICM_192_KEY_LEN_WSALT: + cipher_id = SRTP_AES_ICM_192; + break; + case SRTP_AES_ICM_128_KEY_LEN_WSALT: + cipher_id = SRTP_AES_ICM_128; + break; + default: + return srtp_err_status_bad_param; + break; + } + + stat = srtp_crypto_kernel_alloc_cipher(cipher_id, &kdf->cipher, key_len, 0); + if (stat) + return stat; + + stat = srtp_cipher_init(kdf->cipher, key); + if (stat) { + srtp_cipher_dealloc(kdf->cipher); + return stat; + } + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_kdf_generate(srtp_kdf_t *kdf, + srtp_prf_label label, + uint8_t *key, + unsigned int length) +{ + srtp_err_status_t status; + v128_t nonce; + + /* set eigth octet of nonce to <label>, set the rest of it to zero */ + v128_set_to_zero(&nonce); + nonce.v8[7] = label; + + status = srtp_cipher_set_iv(kdf->cipher, (uint8_t *)&nonce, + srtp_direction_encrypt); + if (status) + return status; + + /* generate keystream output */ + octet_string_set_to_zero(key, length); + status = srtp_cipher_encrypt(kdf->cipher, key, &length); + if (status) + return status; + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_kdf_clear(srtp_kdf_t *kdf) +{ + srtp_err_status_t status; + status = srtp_cipher_dealloc(kdf->cipher); + if (status) + return status; + kdf->cipher = NULL; + return srtp_err_status_ok; +} +#endif /* else OPENSSL_KDF */ + +/* + * end of key derivation functions + */ + +/* Get the base key length corresponding to a given combined key+salt + * length for the given cipher. + * TODO: key and salt lengths should be separate fields in the policy. */ +static inline int base_key_length(const srtp_cipher_type_t *cipher, + int key_length) +{ + switch (cipher->id) { + case SRTP_NULL_CIPHER: + return 0; + case SRTP_AES_ICM_128: + case SRTP_AES_ICM_192: + case SRTP_AES_ICM_256: + /* The legacy modes are derived from + * the configured key length on the policy */ + return key_length - SRTP_SALT_LEN; + case SRTP_AES_GCM_128: + return key_length - SRTP_AEAD_SALT_LEN; + case SRTP_AES_GCM_256: + return key_length - SRTP_AEAD_SALT_LEN; + default: + return key_length; + } +} + +/* Get the key length that the application should supply for the given cipher */ +static inline int full_key_length(const srtp_cipher_type_t *cipher) +{ + switch (cipher->id) { + case SRTP_NULL_CIPHER: + case SRTP_AES_ICM_128: + return SRTP_AES_ICM_128_KEY_LEN_WSALT; + case SRTP_AES_ICM_192: + return SRTP_AES_ICM_192_KEY_LEN_WSALT; + case SRTP_AES_ICM_256: + return SRTP_AES_ICM_256_KEY_LEN_WSALT; + case SRTP_AES_GCM_128: + return SRTP_AES_GCM_128_KEY_LEN_WSALT; + case SRTP_AES_GCM_256: + return SRTP_AES_GCM_256_KEY_LEN_WSALT; + default: + return 0; + } +} + +unsigned int srtp_validate_policy_master_keys(const srtp_policy_t *policy) +{ + unsigned long i = 0; + + if (policy->key == NULL) { + if (policy->num_master_keys <= 0) + return 0; + + if (policy->num_master_keys > SRTP_MAX_NUM_MASTER_KEYS) + return 0; + + for (i = 0; i < policy->num_master_keys; i++) { + if (policy->keys[i]->key == NULL) + return 0; + if (policy->keys[i]->mki_size > SRTP_MAX_MKI_LEN) + return 0; + } + } + + return 1; +} + +srtp_session_keys_t *srtp_get_session_keys_with_mki_index( + srtp_stream_ctx_t *stream, + unsigned int use_mki, + unsigned int mki_index) +{ + if (use_mki) { + if (mki_index >= stream->num_master_keys) { + return NULL; + } + return &stream->session_keys[mki_index]; + } + + return &stream->session_keys[0]; +} + +unsigned int srtp_inject_mki(uint8_t *mki_tag_location, + srtp_session_keys_t *session_keys, + unsigned int use_mki) +{ + unsigned int mki_size = 0; + + if (use_mki) { + mki_size = session_keys->mki_size; + + if (mki_size != 0) { + // Write MKI into memory + memcpy(mki_tag_location, session_keys->mki_id, mki_size); + } + } + + return mki_size; +} + +srtp_err_status_t srtp_stream_init_all_master_keys( + srtp_stream_ctx_t *srtp, + unsigned char *key, + srtp_master_key_t **keys, + const unsigned int max_master_keys) +{ + unsigned int i = 0; + srtp_err_status_t status = srtp_err_status_ok; + srtp_master_key_t single_master_key; + + if (key != NULL) { + srtp->num_master_keys = 1; + single_master_key.key = key; + single_master_key.mki_id = NULL; + single_master_key.mki_size = 0; + status = srtp_stream_init_keys(srtp, &single_master_key, 0); + } else { + srtp->num_master_keys = max_master_keys; + + for (i = 0; i < srtp->num_master_keys && i < SRTP_MAX_NUM_MASTER_KEYS; + i++) { + status = srtp_stream_init_keys(srtp, keys[i], i); + + if (status) { + return status; + } + } + } + + return status; +} + +srtp_err_status_t srtp_stream_init_keys(srtp_stream_ctx_t *srtp, + srtp_master_key_t *master_key, + const unsigned int current_mki_index) +{ + srtp_err_status_t stat; + srtp_kdf_t kdf; + uint8_t tmp_key[MAX_SRTP_KEY_LEN]; + int input_keylen, input_keylen_rtcp; + int kdf_keylen = 30, rtp_keylen, rtcp_keylen; + int rtp_base_key_len, rtp_salt_len; + int rtcp_base_key_len, rtcp_salt_len; + srtp_session_keys_t *session_keys = NULL; + unsigned char *key = master_key->key; + + /* If RTP or RTCP have a key length > AES-128, assume matching kdf. */ + /* TODO: kdf algorithm, master key length, and master salt length should + * be part of srtp_policy_t. + */ + session_keys = &srtp->session_keys[current_mki_index]; + +/* initialize key limit to maximum value */ +#ifdef NO_64BIT_MATH + { + uint64_t temp; + temp = make64(UINT_MAX, UINT_MAX); + srtp_key_limit_set(session_keys->limit, temp); + } +#else + srtp_key_limit_set(session_keys->limit, 0xffffffffffffLL); +#endif + + if (master_key->mki_size != 0) { + session_keys->mki_id = srtp_crypto_alloc(master_key->mki_size); + + if (session_keys->mki_id == NULL) { + return srtp_err_status_init_fail; + } + memcpy(session_keys->mki_id, master_key->mki_id, master_key->mki_size); + } else { + session_keys->mki_id = NULL; + } + + session_keys->mki_size = master_key->mki_size; + + input_keylen = full_key_length(session_keys->rtp_cipher->type); + input_keylen_rtcp = full_key_length(session_keys->rtcp_cipher->type); + if (input_keylen_rtcp > input_keylen) { + input_keylen = input_keylen_rtcp; + } + + rtp_keylen = srtp_cipher_get_key_length(session_keys->rtp_cipher); + rtcp_keylen = srtp_cipher_get_key_length(session_keys->rtcp_cipher); + rtp_base_key_len = + base_key_length(session_keys->rtp_cipher->type, rtp_keylen); + rtp_salt_len = rtp_keylen - rtp_base_key_len; + + if (rtp_keylen > kdf_keylen) { + kdf_keylen = 46; /* AES-CTR mode is always used for KDF */ + } + + if (rtcp_keylen > kdf_keylen) { + kdf_keylen = 46; /* AES-CTR mode is always used for KDF */ + } + + if (input_keylen > kdf_keylen) { + kdf_keylen = 46; /* AES-CTR mode is always used for KDF */ + } + + debug_print(mod_srtp, "input key len: %d", input_keylen); + debug_print(mod_srtp, "srtp key len: %d", rtp_keylen); + debug_print(mod_srtp, "srtcp key len: %d", rtcp_keylen); + debug_print(mod_srtp, "base key len: %d", rtp_base_key_len); + debug_print(mod_srtp, "kdf key len: %d", kdf_keylen); + debug_print(mod_srtp, "rtp salt len: %d", rtp_salt_len); + + /* + * Make sure the key given to us is 'zero' appended. GCM + * mode uses a shorter master SALT (96 bits), but still relies on + * the legacy CTR mode KDF, which uses a 112 bit master SALT. + */ + memset(tmp_key, 0x0, MAX_SRTP_KEY_LEN); + memcpy(tmp_key, key, input_keylen); + +/* initialize KDF state */ +#if defined(OPENSSL) && defined(OPENSSL_KDF) + stat = srtp_kdf_init(&kdf, (const uint8_t *)tmp_key, rtp_base_key_len, + rtp_salt_len); +#else + stat = srtp_kdf_init(&kdf, (const uint8_t *)tmp_key, kdf_keylen); +#endif + if (stat) { + /* zeroize temp buffer */ + octet_string_set_to_zero(tmp_key, MAX_SRTP_KEY_LEN); + return srtp_err_status_init_fail; + } + + /* generate encryption key */ + stat = srtp_kdf_generate(&kdf, label_rtp_encryption, tmp_key, + rtp_base_key_len); + if (stat) { + /* zeroize temp buffer */ + octet_string_set_to_zero(tmp_key, MAX_SRTP_KEY_LEN); + return srtp_err_status_init_fail; + } + debug_print(mod_srtp, "cipher key: %s", + srtp_octet_string_hex_string(tmp_key, rtp_base_key_len)); + + /* + * if the cipher in the srtp context uses a salt, then we need + * to generate the salt value + */ + if (rtp_salt_len > 0) { + debug_print0(mod_srtp, "found rtp_salt_len > 0, generating salt"); + + /* generate encryption salt, put after encryption key */ + stat = srtp_kdf_generate(&kdf, label_rtp_salt, + tmp_key + rtp_base_key_len, rtp_salt_len); + if (stat) { + /* zeroize temp buffer */ + octet_string_set_to_zero(tmp_key, MAX_SRTP_KEY_LEN); + return srtp_err_status_init_fail; + } + memcpy(session_keys->salt, tmp_key + rtp_base_key_len, + SRTP_AEAD_SALT_LEN); + } + if (rtp_salt_len > 0) { + debug_print(mod_srtp, "cipher salt: %s", + srtp_octet_string_hex_string(tmp_key + rtp_base_key_len, + rtp_salt_len)); + } + + /* initialize cipher */ + stat = srtp_cipher_init(session_keys->rtp_cipher, tmp_key); + if (stat) { + /* zeroize temp buffer */ + octet_string_set_to_zero(tmp_key, MAX_SRTP_KEY_LEN); + return srtp_err_status_init_fail; + } + + if (session_keys->rtp_xtn_hdr_cipher) { + /* generate extensions header encryption key */ + int rtp_xtn_hdr_keylen; + int rtp_xtn_hdr_base_key_len; + int rtp_xtn_hdr_salt_len; + srtp_kdf_t tmp_kdf; + srtp_kdf_t *xtn_hdr_kdf; + + if (session_keys->rtp_xtn_hdr_cipher->type != + session_keys->rtp_cipher->type) { + /* + * With GCM ciphers, the header extensions are still encrypted using + * the corresponding ICM cipher. + * See https://tools.ietf.org/html/rfc7714#section-8.3 + */ + uint8_t tmp_xtn_hdr_key[MAX_SRTP_KEY_LEN]; + rtp_xtn_hdr_keylen = + srtp_cipher_get_key_length(session_keys->rtp_xtn_hdr_cipher); + rtp_xtn_hdr_base_key_len = base_key_length( + session_keys->rtp_xtn_hdr_cipher->type, rtp_xtn_hdr_keylen); + rtp_xtn_hdr_salt_len = + rtp_xtn_hdr_keylen - rtp_xtn_hdr_base_key_len; + if (rtp_xtn_hdr_salt_len > rtp_salt_len) { + switch (session_keys->rtp_cipher->type->id) { + case SRTP_AES_GCM_128: + case SRTP_AES_GCM_256: + /* + * The shorter GCM salt is padded to the required ICM salt + * length. + */ + rtp_xtn_hdr_salt_len = rtp_salt_len; + break; + default: + /* zeroize temp buffer */ + octet_string_set_to_zero(tmp_key, MAX_SRTP_KEY_LEN); + return srtp_err_status_bad_param; + } + } + memset(tmp_xtn_hdr_key, 0x0, MAX_SRTP_KEY_LEN); + memcpy(tmp_xtn_hdr_key, key, + (rtp_xtn_hdr_base_key_len + rtp_xtn_hdr_salt_len)); + xtn_hdr_kdf = &tmp_kdf; + +/* initialize KDF state */ +#if defined(OPENSSL) && defined(OPENSSL_KDF) + stat = + srtp_kdf_init(xtn_hdr_kdf, (const uint8_t *)tmp_xtn_hdr_key, + rtp_xtn_hdr_base_key_len, rtp_xtn_hdr_salt_len); +#else + stat = srtp_kdf_init(xtn_hdr_kdf, (const uint8_t *)tmp_xtn_hdr_key, + kdf_keylen); +#endif + octet_string_set_to_zero(tmp_xtn_hdr_key, MAX_SRTP_KEY_LEN); + if (stat) { + /* zeroize temp buffer */ + octet_string_set_to_zero(tmp_key, MAX_SRTP_KEY_LEN); + return srtp_err_status_init_fail; + } + } else { + /* Reuse main KDF. */ + rtp_xtn_hdr_keylen = rtp_keylen; + rtp_xtn_hdr_base_key_len = rtp_base_key_len; + rtp_xtn_hdr_salt_len = rtp_salt_len; + xtn_hdr_kdf = &kdf; + } + + stat = srtp_kdf_generate(xtn_hdr_kdf, label_rtp_header_encryption, + tmp_key, rtp_xtn_hdr_base_key_len); + if (stat) { + /* zeroize temp buffer */ + octet_string_set_to_zero(tmp_key, MAX_SRTP_KEY_LEN); + return srtp_err_status_init_fail; + } + debug_print( + mod_srtp, "extensions cipher key: %s", + srtp_octet_string_hex_string(tmp_key, rtp_xtn_hdr_base_key_len)); + + /* + * if the cipher in the srtp context uses a salt, then we need + * to generate the salt value + */ + if (rtp_xtn_hdr_salt_len > 0) { + debug_print0(mod_srtp, + "found rtp_xtn_hdr_salt_len > 0, generating salt"); + + /* generate encryption salt, put after encryption key */ + stat = srtp_kdf_generate(xtn_hdr_kdf, label_rtp_header_salt, + tmp_key + rtp_xtn_hdr_base_key_len, + rtp_xtn_hdr_salt_len); + if (stat) { + /* zeroize temp buffer */ + octet_string_set_to_zero(tmp_key, MAX_SRTP_KEY_LEN); + return srtp_err_status_init_fail; + } + } + if (rtp_xtn_hdr_salt_len > 0) { + debug_print( + mod_srtp, "extensions cipher salt: %s", + srtp_octet_string_hex_string(tmp_key + rtp_xtn_hdr_base_key_len, + rtp_xtn_hdr_salt_len)); + } + + /* initialize extensions header cipher */ + stat = srtp_cipher_init(session_keys->rtp_xtn_hdr_cipher, tmp_key); + if (stat) { + /* zeroize temp buffer */ + octet_string_set_to_zero(tmp_key, MAX_SRTP_KEY_LEN); + return srtp_err_status_init_fail; + } + + if (xtn_hdr_kdf != &kdf) { + /* release memory for custom header extension encryption kdf */ + stat = srtp_kdf_clear(xtn_hdr_kdf); + if (stat) { + /* zeroize temp buffer */ + octet_string_set_to_zero(tmp_key, MAX_SRTP_KEY_LEN); + return srtp_err_status_init_fail; + } + } + } + + /* generate authentication key */ + stat = srtp_kdf_generate(&kdf, label_rtp_msg_auth, tmp_key, + srtp_auth_get_key_length(session_keys->rtp_auth)); + if (stat) { + /* zeroize temp buffer */ + octet_string_set_to_zero(tmp_key, MAX_SRTP_KEY_LEN); + return srtp_err_status_init_fail; + } + debug_print(mod_srtp, "auth key: %s", + srtp_octet_string_hex_string( + tmp_key, srtp_auth_get_key_length(session_keys->rtp_auth))); + + /* initialize auth function */ + stat = srtp_auth_init(session_keys->rtp_auth, tmp_key); + if (stat) { + /* zeroize temp buffer */ + octet_string_set_to_zero(tmp_key, MAX_SRTP_KEY_LEN); + return srtp_err_status_init_fail; + } + + /* + * ...now initialize SRTCP keys + */ + + rtcp_base_key_len = + base_key_length(session_keys->rtcp_cipher->type, rtcp_keylen); + rtcp_salt_len = rtcp_keylen - rtcp_base_key_len; + debug_print(mod_srtp, "rtcp salt len: %d", rtcp_salt_len); + + /* generate encryption key */ + stat = srtp_kdf_generate(&kdf, label_rtcp_encryption, tmp_key, + rtcp_base_key_len); + if (stat) { + /* zeroize temp buffer */ + octet_string_set_to_zero(tmp_key, MAX_SRTP_KEY_LEN); + return srtp_err_status_init_fail; + } + + /* + * if the cipher in the srtp context uses a salt, then we need + * to generate the salt value + */ + if (rtcp_salt_len > 0) { + debug_print0(mod_srtp, "found rtcp_salt_len > 0, generating rtcp salt"); + + /* generate encryption salt, put after encryption key */ + stat = srtp_kdf_generate(&kdf, label_rtcp_salt, + tmp_key + rtcp_base_key_len, rtcp_salt_len); + if (stat) { + /* zeroize temp buffer */ + octet_string_set_to_zero(tmp_key, MAX_SRTP_KEY_LEN); + return srtp_err_status_init_fail; + } + memcpy(session_keys->c_salt, tmp_key + rtcp_base_key_len, + SRTP_AEAD_SALT_LEN); + } + debug_print(mod_srtp, "rtcp cipher key: %s", + srtp_octet_string_hex_string(tmp_key, rtcp_base_key_len)); + if (rtcp_salt_len > 0) { + debug_print(mod_srtp, "rtcp cipher salt: %s", + srtp_octet_string_hex_string(tmp_key + rtcp_base_key_len, + rtcp_salt_len)); + } + + /* initialize cipher */ + stat = srtp_cipher_init(session_keys->rtcp_cipher, tmp_key); + if (stat) { + /* zeroize temp buffer */ + octet_string_set_to_zero(tmp_key, MAX_SRTP_KEY_LEN); + return srtp_err_status_init_fail; + } + + /* generate authentication key */ + stat = srtp_kdf_generate(&kdf, label_rtcp_msg_auth, tmp_key, + srtp_auth_get_key_length(session_keys->rtcp_auth)); + if (stat) { + /* zeroize temp buffer */ + octet_string_set_to_zero(tmp_key, MAX_SRTP_KEY_LEN); + return srtp_err_status_init_fail; + } + + debug_print( + mod_srtp, "rtcp auth key: %s", + srtp_octet_string_hex_string( + tmp_key, srtp_auth_get_key_length(session_keys->rtcp_auth))); + + /* initialize auth function */ + stat = srtp_auth_init(session_keys->rtcp_auth, tmp_key); + if (stat) { + /* zeroize temp buffer */ + octet_string_set_to_zero(tmp_key, MAX_SRTP_KEY_LEN); + return srtp_err_status_init_fail; + } + + /* clear memory then return */ + stat = srtp_kdf_clear(&kdf); + octet_string_set_to_zero(tmp_key, MAX_SRTP_KEY_LEN); + if (stat) + return srtp_err_status_init_fail; + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_stream_init(srtp_stream_ctx_t *srtp, + const srtp_policy_t *p) +{ + srtp_err_status_t err; + + err = srtp_valid_policy(p); + if (err != srtp_err_status_ok) { + return err; + } + + debug_print(mod_srtp, "initializing stream (SSRC: 0x%08x)", p->ssrc.value); + + /* initialize replay database */ + /* + * window size MUST be at least 64. MAY be larger. Values more than + * 2^15 aren't meaningful due to how extended sequence numbers are + * calculated. + * Let a window size of 0 imply the default value. + */ + + if (p->window_size != 0 && + (p->window_size < 64 || p->window_size >= 0x8000)) + return srtp_err_status_bad_param; + + if (p->window_size != 0) + err = srtp_rdbx_init(&srtp->rtp_rdbx, p->window_size); + else + err = srtp_rdbx_init(&srtp->rtp_rdbx, 128); + if (err) + return err; + + /* set the SSRC value */ + srtp->ssrc = htonl(p->ssrc.value); + + /* reset pending ROC */ + srtp->pending_roc = 0; + + /* set the security service flags */ + srtp->rtp_services = p->rtp.sec_serv; + srtp->rtcp_services = p->rtcp.sec_serv; + + /* + * set direction to unknown - this flag gets checked in srtp_protect(), + * srtp_unprotect(), srtp_protect_rtcp(), and srtp_unprotect_rtcp(), and + * gets set appropriately if it is set to unknown. + */ + srtp->direction = dir_unknown; + + /* initialize SRTCP replay database */ + srtp_rdb_init(&srtp->rtcp_rdb); + + /* initialize allow_repeat_tx */ + /* guard against uninitialized memory: allow only 0 or 1 here */ + if (p->allow_repeat_tx != 0 && p->allow_repeat_tx != 1) { + srtp_rdbx_dealloc(&srtp->rtp_rdbx); + return srtp_err_status_bad_param; + } + srtp->allow_repeat_tx = p->allow_repeat_tx; + + /* DAM - no RTCP key limit at present */ + + /* initialize keys */ + err = srtp_stream_init_all_master_keys(srtp, p->key, p->keys, + p->num_master_keys); + if (err) { + srtp_rdbx_dealloc(&srtp->rtp_rdbx); + return err; + } + + return srtp_err_status_ok; +} + +/* + * srtp_event_reporter is an event handler function that merely + * reports the events that are reported by the callbacks + */ + +void srtp_event_reporter(srtp_event_data_t *data) +{ + srtp_err_report(srtp_err_level_warning, "srtp: in stream 0x%x: ", + data->ssrc); + + switch (data->event) { + case event_ssrc_collision: + srtp_err_report(srtp_err_level_warning, "\tSSRC collision\n"); + break; + case event_key_soft_limit: + srtp_err_report(srtp_err_level_warning, + "\tkey usage soft limit reached\n"); + break; + case event_key_hard_limit: + srtp_err_report(srtp_err_level_warning, + "\tkey usage hard limit reached\n"); + break; + case event_packet_index_limit: + srtp_err_report(srtp_err_level_warning, + "\tpacket index limit reached\n"); + break; + default: + srtp_err_report(srtp_err_level_warning, + "\tunknown event reported to handler\n"); + } +} + +/* + * srtp_event_handler is a global variable holding a pointer to the + * event handler function; this function is called for any unexpected + * event that needs to be handled out of the SRTP data path. see + * srtp_event_t in srtp.h for more info + * + * it is okay to set srtp_event_handler to NULL, but we set + * it to the srtp_event_reporter. + */ + +static srtp_event_handler_func_t *srtp_event_handler = srtp_event_reporter; + +srtp_err_status_t srtp_install_event_handler(srtp_event_handler_func_t func) +{ + /* + * note that we accept NULL arguments intentionally - calling this + * function with a NULL arguments removes an event handler that's + * been previously installed + */ + + /* set global event handling function */ + srtp_event_handler = func; + return srtp_err_status_ok; +} + +/* + * Check if the given extension header id is / should be encrypted. + * Returns 1 if yes, otherwise 0. + */ +static int srtp_protect_extension_header(srtp_stream_ctx_t *stream, int id) +{ + int *enc_xtn_hdr = stream->enc_xtn_hdr; + int count = stream->enc_xtn_hdr_count; + + if (!enc_xtn_hdr || count <= 0) { + return 0; + } + + while (count > 0) { + if (*enc_xtn_hdr == id) { + return 1; + } + + enc_xtn_hdr++; + count--; + } + return 0; +} + +/* + * extensions header encryption RFC 6904 + */ +static srtp_err_status_t srtp_process_header_encryption( + srtp_stream_ctx_t *stream, + srtp_hdr_xtnd_t *xtn_hdr, + srtp_session_keys_t *session_keys) +{ + srtp_err_status_t status; + uint8_t keystream[257]; /* Maximum 2 bytes header + 255 bytes data. */ + int keystream_pos; + uint8_t *xtn_hdr_data = ((uint8_t *)xtn_hdr) + octets_in_rtp_extn_hdr; + uint8_t *xtn_hdr_end = + xtn_hdr_data + (ntohs(xtn_hdr->length) * sizeof(uint32_t)); + + if (ntohs(xtn_hdr->profile_specific) == 0xbede) { + /* RFC 5285, section 4.2. One-Byte Header */ + while (xtn_hdr_data < xtn_hdr_end) { + uint8_t xid = (*xtn_hdr_data & 0xf0) >> 4; + unsigned int xlen = (*xtn_hdr_data & 0x0f) + 1; + uint32_t xlen_with_header = 1 + xlen; + xtn_hdr_data++; + + if (xtn_hdr_data + xlen > xtn_hdr_end) + return srtp_err_status_parse_err; + + if (xid == 15) { + /* found header 15, stop further processing. */ + break; + } + + status = srtp_cipher_output(session_keys->rtp_xtn_hdr_cipher, + keystream, &xlen_with_header); + if (status) + return srtp_err_status_cipher_fail; + + if (srtp_protect_extension_header(stream, xid)) { + keystream_pos = 1; + while (xlen > 0) { + *xtn_hdr_data ^= keystream[keystream_pos++]; + xtn_hdr_data++; + xlen--; + } + } else { + xtn_hdr_data += xlen; + } + + /* skip padding bytes. */ + while (xtn_hdr_data < xtn_hdr_end && *xtn_hdr_data == 0) { + xtn_hdr_data++; + } + } + } else if ((ntohs(xtn_hdr->profile_specific) & 0xfff0) == 0x1000) { + /* RFC 5285, section 4.3. Two-Byte Header */ + while (xtn_hdr_data + 1 < xtn_hdr_end) { + uint8_t xid = *xtn_hdr_data; + unsigned int xlen = *(xtn_hdr_data + 1); + uint32_t xlen_with_header = 2 + xlen; + xtn_hdr_data += 2; + + if (xtn_hdr_data + xlen > xtn_hdr_end) + return srtp_err_status_parse_err; + + status = srtp_cipher_output(session_keys->rtp_xtn_hdr_cipher, + keystream, &xlen_with_header); + if (status) + return srtp_err_status_cipher_fail; + + if (xlen > 0 && srtp_protect_extension_header(stream, xid)) { + keystream_pos = 2; + while (xlen > 0) { + *xtn_hdr_data ^= keystream[keystream_pos++]; + xtn_hdr_data++; + xlen--; + } + } else { + xtn_hdr_data += xlen; + } + + /* skip padding bytes. */ + while (xtn_hdr_data < xtn_hdr_end && *xtn_hdr_data == 0) { + xtn_hdr_data++; + } + } + } else { + /* unsupported extension header format. */ + return srtp_err_status_parse_err; + } + + return srtp_err_status_ok; +} + +/* + * AEAD uses a new IV formation method. This function implements + * section 8.1. (SRTP IV Formation for AES-GCM) of RFC7714. + * The calculation is defined as, where (+) is the xor operation: + * + * + * 0 0 0 0 0 0 0 0 0 0 1 1 + * 0 1 2 3 4 5 6 7 8 9 0 1 + * +--+--+--+--+--+--+--+--+--+--+--+--+ + * |00|00| SSRC | ROC | SEQ |---+ + * +--+--+--+--+--+--+--+--+--+--+--+--+ | + * | + * +--+--+--+--+--+--+--+--+--+--+--+--+ | + * | Encryption Salt |->(+) + * +--+--+--+--+--+--+--+--+--+--+--+--+ | + * | + * +--+--+--+--+--+--+--+--+--+--+--+--+ | + * | Initialization Vector |<--+ + * +--+--+--+--+--+--+--+--+--+--+--+--+* + * + * Input: *session_keys - pointer to SRTP stream context session keys, + * used to retrieve the SALT + * *iv - Pointer to receive the calculated IV + * *seq - The ROC and SEQ value to use for the + * IV calculation. + * *hdr - The RTP header, used to get the SSRC value + * + */ + +static void srtp_calc_aead_iv(srtp_session_keys_t *session_keys, + v128_t *iv, + srtp_xtd_seq_num_t *seq, + srtp_hdr_t *hdr) +{ + v128_t in; + v128_t salt; + +#ifdef NO_64BIT_MATH + uint32_t local_roc = ((high32(*seq) << 16) | (low32(*seq) >> 16)); + uint16_t local_seq = (uint16_t)(low32(*seq)); +#else + uint32_t local_roc = (uint32_t)(*seq >> 16); + uint16_t local_seq = (uint16_t)*seq; +#endif + + memset(&in, 0, sizeof(v128_t)); + memset(&salt, 0, sizeof(v128_t)); + + in.v16[5] = htons(local_seq); + local_roc = htonl(local_roc); + memcpy(&in.v16[3], &local_roc, sizeof(local_roc)); + + /* + * Copy in the RTP SSRC value + */ + memcpy(&in.v8[2], &hdr->ssrc, 4); + debug_print(mod_srtp, "Pre-salted RTP IV = %s\n", v128_hex_string(&in)); + + /* + * Get the SALT value from the context + */ + memcpy(salt.v8, session_keys->salt, SRTP_AEAD_SALT_LEN); + debug_print(mod_srtp, "RTP SALT = %s\n", v128_hex_string(&salt)); + + /* + * Finally, apply tyhe SALT to the input + */ + v128_xor(iv, &in, &salt); +} + +srtp_session_keys_t *srtp_get_session_keys(srtp_stream_ctx_t *stream, + uint8_t *hdr, + const unsigned int *pkt_octet_len, + unsigned int *mki_size) +{ + unsigned int base_mki_start_location = *pkt_octet_len; + unsigned int mki_start_location = 0; + unsigned int tag_len = 0; + unsigned int i = 0; + + // Determine the authentication tag size + if (stream->session_keys[0].rtp_cipher->algorithm == SRTP_AES_GCM_128 || + stream->session_keys[0].rtp_cipher->algorithm == SRTP_AES_GCM_256) { + tag_len = 0; + } else { + tag_len = srtp_auth_get_tag_length(stream->session_keys[0].rtp_auth); + } + + if (tag_len > base_mki_start_location) { + *mki_size = 0; + return NULL; + } + + base_mki_start_location -= tag_len; + + for (i = 0; i < stream->num_master_keys; i++) { + if (stream->session_keys[i].mki_size != 0 && + stream->session_keys[i].mki_size <= base_mki_start_location) { + *mki_size = stream->session_keys[i].mki_size; + mki_start_location = base_mki_start_location - *mki_size; + + if (memcmp(hdr + mki_start_location, stream->session_keys[i].mki_id, + *mki_size) == 0) { + return &stream->session_keys[i]; + } + } + } + + *mki_size = 0; + return NULL; +} + +static srtp_err_status_t srtp_estimate_index(srtp_rdbx_t *rdbx, + uint32_t roc, + srtp_xtd_seq_num_t *est, + srtp_sequence_number_t seq, + int *delta) +{ +#ifdef NO_64BIT_MATH + uint32_t internal_pkt_idx_reduced; + uint32_t external_pkt_idx_reduced; + uint32_t internal_roc; + uint32_t roc_difference; +#endif + +#ifdef NO_64BIT_MATH + *est = (srtp_xtd_seq_num_t)make64(roc >> 16, (roc << 16) | seq); + *delta = low32(est) - rdbx->index; +#else + *est = (srtp_xtd_seq_num_t)(((uint64_t)roc) << 16) | seq; + *delta = (int)(*est - rdbx->index); +#endif + + if (*est > rdbx->index) { +#ifdef NO_64BIT_MATH + internal_roc = (uint32_t)(rdbx->index >> 16); + roc_difference = roc - internal_roc; + if (roc_difference > 1) { + *delta = 0; + return srtp_err_status_pkt_idx_adv; + } + + internal_pkt_idx_reduced = (uint32_t)(rdbx->index & 0xFFFF); + external_pkt_idx_reduced = (uint32_t)((roc_difference << 16) | seq); + + if (external_pkt_idx_reduced - internal_pkt_idx_reduced > + seq_num_median) { + *delta = 0; + return srtp_err_status_pkt_idx_adv; + } +#else + if (*est - rdbx->index > seq_num_median) { + *delta = 0; + return srtp_err_status_pkt_idx_adv; + } +#endif + } else if (*est < rdbx->index) { +#ifdef NO_64BIT_MATH + + internal_roc = (uint32_t)(rdbx->index >> 16); + roc_difference = internal_roc - roc; + if (roc_difference > 1) { + *delta = 0; + return srtp_err_status_pkt_idx_adv; + } + + internal_pkt_idx_reduced = + (uint32_t)((roc_difference << 16) | rdbx->index & 0xFFFF); + external_pkt_idx_reduced = (uint32_t)(seq); + + if (internal_pkt_idx_reduced - external_pkt_idx_reduced > + seq_num_median) { + *delta = 0; + return srtp_err_status_pkt_idx_old; + } +#else + if (rdbx->index - *est > seq_num_median) { + *delta = 0; + return srtp_err_status_pkt_idx_old; + } +#endif + } + + return srtp_err_status_ok; +} + +static srtp_err_status_t srtp_get_est_pkt_index(srtp_hdr_t *hdr, + srtp_stream_ctx_t *stream, + srtp_xtd_seq_num_t *est, + int *delta) +{ + srtp_err_status_t result = srtp_err_status_ok; + + if (stream->pending_roc) { + result = srtp_estimate_index(&stream->rtp_rdbx, stream->pending_roc, + est, ntohs(hdr->seq), delta); + } else { + /* estimate packet index from seq. num. in header */ + *delta = + srtp_rdbx_estimate_index(&stream->rtp_rdbx, est, ntohs(hdr->seq)); + } + +#ifdef NO_64BIT_MATH + debug_print2(mod_srtp, "estimated u_packet index: %08x%08x", high32(*est), + low32(*est)); +#else + debug_print(mod_srtp, "estimated u_packet index: %016" PRIx64, *est); +#endif + return result; +} + +/* + * This function handles outgoing SRTP packets while in AEAD mode, + * which currently supports AES-GCM encryption. All packets are + * encrypted and authenticated. + */ +static srtp_err_status_t srtp_protect_aead(srtp_ctx_t *ctx, + srtp_stream_ctx_t *stream, + void *rtp_hdr, + unsigned int *pkt_octet_len, + srtp_session_keys_t *session_keys, + unsigned int use_mki) +{ + srtp_hdr_t *hdr = (srtp_hdr_t *)rtp_hdr; + uint32_t *enc_start; /* pointer to start of encrypted portion */ + int enc_octet_len = 0; /* number of octets in encrypted portion */ + srtp_xtd_seq_num_t est; /* estimated xtd_seq_num_t of *hdr */ + int delta; /* delta of local pkt idx and that in hdr */ + srtp_err_status_t status; + uint32_t tag_len; + v128_t iv; + unsigned int aad_len; + srtp_hdr_xtnd_t *xtn_hdr = NULL; + unsigned int mki_size = 0; + uint8_t *mki_location = NULL; + + debug_print0(mod_srtp, "function srtp_protect_aead"); + + /* + * update the key usage limit, and check it to make sure that we + * didn't just hit either the soft limit or the hard limit, and call + * the event handler if we hit either. + */ + switch (srtp_key_limit_update(session_keys->limit)) { + case srtp_key_event_normal: + break; + case srtp_key_event_hard_limit: + srtp_handle_event(ctx, stream, event_key_hard_limit); + return srtp_err_status_key_expired; + case srtp_key_event_soft_limit: + default: + srtp_handle_event(ctx, stream, event_key_soft_limit); + break; + } + + /* get tag length from stream */ + tag_len = srtp_auth_get_tag_length(session_keys->rtp_auth); + + /* + * find starting point for encryption and length of data to be + * encrypted - the encrypted portion starts after the rtp header + * extension, if present; otherwise, it starts after the last csrc, + * if any are present + */ + enc_start = (uint32_t *)hdr + uint32s_in_rtp_header + hdr->cc; + if (hdr->x == 1) { + xtn_hdr = (srtp_hdr_xtnd_t *)enc_start; + enc_start += (ntohs(xtn_hdr->length) + 1); + } + /* note: the passed size is without the auth tag */ + if (!((uint8_t *)enc_start <= (uint8_t *)hdr + *pkt_octet_len)) + return srtp_err_status_parse_err; + enc_octet_len = + (int)(*pkt_octet_len - ((uint8_t *)enc_start - (uint8_t *)hdr)); + if (enc_octet_len < 0) + return srtp_err_status_parse_err; + + /* + * estimate the packet index using the start of the replay window + * and the sequence number from the header + */ + delta = srtp_rdbx_estimate_index(&stream->rtp_rdbx, &est, ntohs(hdr->seq)); + status = srtp_rdbx_check(&stream->rtp_rdbx, delta); + if (status) { + if (status != srtp_err_status_replay_fail || !stream->allow_repeat_tx) { + return status; /* we've been asked to reuse an index */ + } + } else { + srtp_rdbx_add_index(&stream->rtp_rdbx, delta); + } + +#ifdef NO_64BIT_MATH + debug_print2(mod_srtp, "estimated packet index: %08x%08x", high32(est), + low32(est)); +#else + debug_print(mod_srtp, "estimated packet index: %016" PRIx64, est); +#endif + + /* + * AEAD uses a new IV formation method + */ + srtp_calc_aead_iv(session_keys, &iv, &est, hdr); +/* shift est, put into network byte order */ +#ifdef NO_64BIT_MATH + est = be64_to_cpu( + make64((high32(est) << 16) | (low32(est) >> 16), low32(est) << 16)); +#else + est = be64_to_cpu(est << 16); +#endif + + status = srtp_cipher_set_iv(session_keys->rtp_cipher, (uint8_t *)&iv, + srtp_direction_encrypt); + if (!status && session_keys->rtp_xtn_hdr_cipher) { + iv.v32[0] = 0; + iv.v32[1] = hdr->ssrc; + iv.v64[1] = est; + status = srtp_cipher_set_iv(session_keys->rtp_xtn_hdr_cipher, + (uint8_t *)&iv, srtp_direction_encrypt); + } + if (status) { + return srtp_err_status_cipher_fail; + } + + if (xtn_hdr && session_keys->rtp_xtn_hdr_cipher) { + /* + * extensions header encryption RFC 6904 + */ + status = srtp_process_header_encryption(stream, xtn_hdr, session_keys); + if (status) { + return status; + } + } + + /* + * Set the AAD over the RTP header + */ + aad_len = (uint8_t *)enc_start - (uint8_t *)hdr; + status = + srtp_cipher_set_aad(session_keys->rtp_cipher, (uint8_t *)hdr, aad_len); + if (status) { + return (srtp_err_status_cipher_fail); + } + + /* Encrypt the payload */ + status = srtp_cipher_encrypt(session_keys->rtp_cipher, (uint8_t *)enc_start, + (unsigned int *)&enc_octet_len); + if (status) { + return srtp_err_status_cipher_fail; + } + /* + * If we're doing GCM, we need to get the tag + * and append that to the output + */ + status = + srtp_cipher_get_tag(session_keys->rtp_cipher, + (uint8_t *)enc_start + enc_octet_len, &tag_len); + if (status) { + return (srtp_err_status_cipher_fail); + } + + mki_location = (uint8_t *)hdr + *pkt_octet_len + tag_len; + mki_size = srtp_inject_mki(mki_location, session_keys, use_mki); + + /* increase the packet length by the length of the auth tag */ + *pkt_octet_len += tag_len; + + /* increase the packet length by the length of the mki_size */ + *pkt_octet_len += mki_size; + + return srtp_err_status_ok; +} + +/* + * This function handles incoming SRTP packets while in AEAD mode, + * which currently supports AES-GCM encryption. All packets are + * encrypted and authenticated. Note, the auth tag is at the end + * of the packet stream and is automatically checked by GCM + * when decrypting the payload. + */ +static srtp_err_status_t srtp_unprotect_aead(srtp_ctx_t *ctx, + srtp_stream_ctx_t *stream, + int delta, + srtp_xtd_seq_num_t est, + void *srtp_hdr, + unsigned int *pkt_octet_len, + srtp_session_keys_t *session_keys, + unsigned int mki_size) +{ + srtp_hdr_t *hdr = (srtp_hdr_t *)srtp_hdr; + uint32_t *enc_start; /* pointer to start of encrypted portion */ + unsigned int enc_octet_len = 0; /* number of octets in encrypted portion */ + v128_t iv; + srtp_err_status_t status; + int tag_len; + unsigned int aad_len; + srtp_hdr_xtnd_t *xtn_hdr = NULL; + + debug_print0(mod_srtp, "function srtp_unprotect_aead"); + +#ifdef NO_64BIT_MATH + debug_print2(mod_srtp, "estimated u_packet index: %08x%08x", high32(est), + low32(est)); +#else + debug_print(mod_srtp, "estimated u_packet index: %016" PRIx64, est); +#endif + + /* get tag length from stream */ + tag_len = srtp_auth_get_tag_length(session_keys->rtp_auth); + + /* + * AEAD uses a new IV formation method + */ + srtp_calc_aead_iv(session_keys, &iv, &est, hdr); + status = srtp_cipher_set_iv(session_keys->rtp_cipher, (uint8_t *)&iv, + srtp_direction_decrypt); + if (!status && session_keys->rtp_xtn_hdr_cipher) { + iv.v32[0] = 0; + iv.v32[1] = hdr->ssrc; +#ifdef NO_64BIT_MATH + iv.v64[1] = be64_to_cpu( + make64((high32(est) << 16) | (low32(est) >> 16), low32(est) << 16)); +#else + iv.v64[1] = be64_to_cpu(est << 16); +#endif + status = srtp_cipher_set_iv(session_keys->rtp_xtn_hdr_cipher, + (uint8_t *)&iv, srtp_direction_encrypt); + } + if (status) { + return srtp_err_status_cipher_fail; + } + + /* + * find starting point for decryption and length of data to be + * decrypted - the encrypted portion starts after the rtp header + * extension, if present; otherwise, it starts after the last csrc, + * if any are present + */ + enc_start = (uint32_t *)hdr + uint32s_in_rtp_header + hdr->cc; + if (hdr->x == 1) { + xtn_hdr = (srtp_hdr_xtnd_t *)enc_start; + enc_start += (ntohs(xtn_hdr->length) + 1); + } + if (!((uint8_t *)enc_start <= + (uint8_t *)hdr + (*pkt_octet_len - tag_len - mki_size))) + return srtp_err_status_parse_err; + /* + * We pass the tag down to the cipher when doing GCM mode + */ + enc_octet_len = (unsigned int)(*pkt_octet_len - mki_size - + ((uint8_t *)enc_start - (uint8_t *)hdr)); + + /* + * Sanity check the encrypted payload length against + * the tag size. It must always be at least as large + * as the tag length. + */ + if (enc_octet_len < (unsigned int)tag_len) { + return srtp_err_status_cipher_fail; + } + + /* + * update the key usage limit, and check it to make sure that we + * didn't just hit either the soft limit or the hard limit, and call + * the event handler if we hit either. + */ + switch (srtp_key_limit_update(session_keys->limit)) { + case srtp_key_event_normal: + break; + case srtp_key_event_soft_limit: + srtp_handle_event(ctx, stream, event_key_soft_limit); + break; + case srtp_key_event_hard_limit: + srtp_handle_event(ctx, stream, event_key_hard_limit); + return srtp_err_status_key_expired; + default: + break; + } + + /* + * Set the AAD for AES-GCM, which is the RTP header + */ + aad_len = (uint8_t *)enc_start - (uint8_t *)hdr; + status = + srtp_cipher_set_aad(session_keys->rtp_cipher, (uint8_t *)hdr, aad_len); + if (status) { + return (srtp_err_status_cipher_fail); + } + + /* Decrypt the ciphertext. This also checks the auth tag based + * on the AAD we just specified above */ + status = srtp_cipher_decrypt(session_keys->rtp_cipher, (uint8_t *)enc_start, + &enc_octet_len); + if (status) { + return status; + } + + if (xtn_hdr && session_keys->rtp_xtn_hdr_cipher) { + /* + * extensions header encryption RFC 6904 + */ + status = srtp_process_header_encryption(stream, xtn_hdr, session_keys); + if (status) { + return status; + } + } + + /* + * verify that stream is for received traffic - this check will + * detect SSRC collisions, since a stream that appears in both + * srtp_protect() and srtp_unprotect() will fail this test in one of + * those functions. + * + * we do this check *after* the authentication check, so that the + * latter check will catch any attempts to fool us into thinking + * that we've got a collision + */ + if (stream->direction != dir_srtp_receiver) { + if (stream->direction == dir_unknown) { + stream->direction = dir_srtp_receiver; + } else { + srtp_handle_event(ctx, stream, event_ssrc_collision); + } + } + + /* + * if the stream is a 'provisional' one, in which the template context + * is used, then we need to allocate a new stream at this point, since + * the authentication passed + */ + if (stream == ctx->stream_template) { + srtp_stream_ctx_t *new_stream; + + /* + * allocate and initialize a new stream + * + * note that we indicate failure if we can't allocate the new + * stream, and some implementations will want to not return + * failure here + */ + status = + srtp_stream_clone(ctx->stream_template, hdr->ssrc, &new_stream); + if (status) { + return status; + } + + /* add new stream to the head of the stream_list */ + new_stream->next = ctx->stream_list; + ctx->stream_list = new_stream; + + /* set stream (the pointer used in this function) */ + stream = new_stream; + } + + /* + * the message authentication function passed, so add the packet + * index into the replay database + */ + srtp_rdbx_add_index(&stream->rtp_rdbx, delta); + + /* decrease the packet length by the length of the auth tag */ + *pkt_octet_len -= tag_len; + + /* decrease the packet length by the length of the mki_size */ + *pkt_octet_len -= mki_size; + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_protect(srtp_ctx_t *ctx, + void *rtp_hdr, + int *pkt_octet_len) +{ + return srtp_protect_mki(ctx, rtp_hdr, pkt_octet_len, 0, 0); +} + +srtp_err_status_t srtp_protect_mki(srtp_ctx_t *ctx, + void *rtp_hdr, + int *pkt_octet_len, + unsigned int use_mki, + unsigned int mki_index) +{ + srtp_hdr_t *hdr = (srtp_hdr_t *)rtp_hdr; + uint32_t *enc_start; /* pointer to start of encrypted portion */ + uint32_t *auth_start; /* pointer to start of auth. portion */ + int enc_octet_len = 0; /* number of octets in encrypted portion */ + srtp_xtd_seq_num_t est; /* estimated xtd_seq_num_t of *hdr */ + int delta; /* delta of local pkt idx and that in hdr */ + uint8_t *auth_tag = NULL; /* location of auth_tag within packet */ + srtp_err_status_t status; + int tag_len; + srtp_stream_ctx_t *stream; + uint32_t prefix_len; + srtp_hdr_xtnd_t *xtn_hdr = NULL; + unsigned int mki_size = 0; + srtp_session_keys_t *session_keys = NULL; + uint8_t *mki_location = NULL; + int advance_packet_index = 0; + + debug_print0(mod_srtp, "function srtp_protect"); + + /* we assume the hdr is 32-bit aligned to start */ + + /* Verify RTP header */ + status = srtp_validate_rtp_header(rtp_hdr, pkt_octet_len); + if (status) + return status; + + /* check the packet length - it must at least contain a full header */ + if (*pkt_octet_len < octets_in_rtp_header) + return srtp_err_status_bad_param; + + /* + * look up ssrc in srtp_stream list, and process the packet with + * the appropriate stream. if we haven't seen this stream before, + * there's a template key for this srtp_session, and the cipher + * supports key-sharing, then we assume that a new stream using + * that key has just started up + */ + stream = srtp_get_stream(ctx, hdr->ssrc); + if (stream == NULL) { + if (ctx->stream_template != NULL) { + srtp_stream_ctx_t *new_stream; + + /* allocate and initialize a new stream */ + status = + srtp_stream_clone(ctx->stream_template, hdr->ssrc, &new_stream); + if (status) + return status; + + /* add new stream to the head of the stream_list */ + new_stream->next = ctx->stream_list; + ctx->stream_list = new_stream; + + /* set direction to outbound */ + new_stream->direction = dir_srtp_sender; + + /* set stream (the pointer used in this function) */ + stream = new_stream; + } else { + /* no template stream, so we return an error */ + return srtp_err_status_no_ctx; + } + } + + /* + * verify that stream is for sending traffic - this check will + * detect SSRC collisions, since a stream that appears in both + * srtp_protect() and srtp_unprotect() will fail this test in one of + * those functions. + */ + + if (stream->direction != dir_srtp_sender) { + if (stream->direction == dir_unknown) { + stream->direction = dir_srtp_sender; + } else { + srtp_handle_event(ctx, stream, event_ssrc_collision); + } + } + + session_keys = + srtp_get_session_keys_with_mki_index(stream, use_mki, mki_index); + + if (session_keys == NULL) + return srtp_err_status_bad_mki; + + /* + * Check if this is an AEAD stream (GCM mode). If so, then dispatch + * the request to our AEAD handler. + */ + if (session_keys->rtp_cipher->algorithm == SRTP_AES_GCM_128 || + session_keys->rtp_cipher->algorithm == SRTP_AES_GCM_256) { + return srtp_protect_aead(ctx, stream, rtp_hdr, + (unsigned int *)pkt_octet_len, session_keys, + use_mki); + } + + /* + * update the key usage limit, and check it to make sure that we + * didn't just hit either the soft limit or the hard limit, and call + * the event handler if we hit either. + */ + switch (srtp_key_limit_update(session_keys->limit)) { + case srtp_key_event_normal: + break; + case srtp_key_event_soft_limit: + srtp_handle_event(ctx, stream, event_key_soft_limit); + break; + case srtp_key_event_hard_limit: + srtp_handle_event(ctx, stream, event_key_hard_limit); + return srtp_err_status_key_expired; + default: + break; + } + + /* get tag length from stream */ + tag_len = srtp_auth_get_tag_length(session_keys->rtp_auth); + + /* + * find starting point for encryption and length of data to be + * encrypted - the encrypted portion starts after the rtp header + * extension, if present; otherwise, it starts after the last csrc, + * if any are present + * + * if we're not providing confidentiality, set enc_start to NULL + */ + if (stream->rtp_services & sec_serv_conf) { + enc_start = (uint32_t *)hdr + uint32s_in_rtp_header + hdr->cc; + if (hdr->x == 1) { + xtn_hdr = (srtp_hdr_xtnd_t *)enc_start; + enc_start += (ntohs(xtn_hdr->length) + 1); + } + /* note: the passed size is without the auth tag */ + if (!((uint8_t *)enc_start <= (uint8_t *)hdr + *pkt_octet_len)) + return srtp_err_status_parse_err; + enc_octet_len = + (int)(*pkt_octet_len - ((uint8_t *)enc_start - (uint8_t *)hdr)); + if (enc_octet_len < 0) + return srtp_err_status_parse_err; + } else { + enc_start = NULL; + } + + mki_location = (uint8_t *)hdr + *pkt_octet_len; + mki_size = srtp_inject_mki(mki_location, session_keys, use_mki); + + /* + * if we're providing authentication, set the auth_start and auth_tag + * pointers to the proper locations; otherwise, set auth_start to NULL + * to indicate that no authentication is needed + */ + if (stream->rtp_services & sec_serv_auth) { + auth_start = (uint32_t *)hdr; + auth_tag = (uint8_t *)hdr + *pkt_octet_len + mki_size; + } else { + auth_start = NULL; + auth_tag = NULL; + } + + /* + * estimate the packet index using the start of the replay window + * and the sequence number from the header + */ + status = srtp_get_est_pkt_index(hdr, stream, &est, &delta); + + if (status && (status != srtp_err_status_pkt_idx_adv)) + return status; + + if (status == srtp_err_status_pkt_idx_adv) + advance_packet_index = 1; + + if (advance_packet_index) { + srtp_rdbx_set_roc_seq(&stream->rtp_rdbx, (uint32_t)(est >> 16), + (uint16_t)(est & 0xFFFF)); + stream->pending_roc = 0; + srtp_rdbx_add_index(&stream->rtp_rdbx, 0); + } else { + status = srtp_rdbx_check(&stream->rtp_rdbx, delta); + if (status) { + if (status != srtp_err_status_replay_fail || + !stream->allow_repeat_tx) + return status; /* we've been asked to reuse an index */ + } + srtp_rdbx_add_index(&stream->rtp_rdbx, delta); + } + +#ifdef NO_64BIT_MATH + debug_print2(mod_srtp, "estimated packet index: %08x%08x", high32(est), + low32(est)); +#else + debug_print(mod_srtp, "estimated packet index: %016" PRIx64, est); +#endif + + /* + * if we're using rindael counter mode, set nonce and seq + */ + if (session_keys->rtp_cipher->type->id == SRTP_AES_ICM_128 || + session_keys->rtp_cipher->type->id == SRTP_AES_ICM_192 || + session_keys->rtp_cipher->type->id == SRTP_AES_ICM_256) { + v128_t iv; + + iv.v32[0] = 0; + iv.v32[1] = hdr->ssrc; +#ifdef NO_64BIT_MATH + iv.v64[1] = be64_to_cpu( + make64((high32(est) << 16) | (low32(est) >> 16), low32(est) << 16)); +#else + iv.v64[1] = be64_to_cpu(est << 16); +#endif + status = srtp_cipher_set_iv(session_keys->rtp_cipher, (uint8_t *)&iv, + srtp_direction_encrypt); + if (!status && session_keys->rtp_xtn_hdr_cipher) { + status = srtp_cipher_set_iv(session_keys->rtp_xtn_hdr_cipher, + (uint8_t *)&iv, srtp_direction_encrypt); + } + } else { + v128_t iv; + +/* otherwise, set the index to est */ +#ifdef NO_64BIT_MATH + iv.v32[0] = 0; + iv.v32[1] = 0; +#else + iv.v64[0] = 0; +#endif + iv.v64[1] = be64_to_cpu(est); + status = srtp_cipher_set_iv(session_keys->rtp_cipher, (uint8_t *)&iv, + srtp_direction_encrypt); + if (!status && session_keys->rtp_xtn_hdr_cipher) { + status = srtp_cipher_set_iv(session_keys->rtp_xtn_hdr_cipher, + (uint8_t *)&iv, srtp_direction_encrypt); + } + } + if (status) + return srtp_err_status_cipher_fail; + +/* shift est, put into network byte order */ +#ifdef NO_64BIT_MATH + est = be64_to_cpu( + make64((high32(est) << 16) | (low32(est) >> 16), low32(est) << 16)); +#else + est = be64_to_cpu(est << 16); +#endif + + /* + * if we're authenticating using a universal hash, put the keystream + * prefix into the authentication tag + */ + if (auth_start) { + prefix_len = srtp_auth_get_prefix_length(session_keys->rtp_auth); + if (prefix_len) { + status = srtp_cipher_output(session_keys->rtp_cipher, auth_tag, + &prefix_len); + if (status) + return srtp_err_status_cipher_fail; + debug_print(mod_srtp, "keystream prefix: %s", + srtp_octet_string_hex_string(auth_tag, prefix_len)); + } + } + + if (xtn_hdr && session_keys->rtp_xtn_hdr_cipher) { + /* + * extensions header encryption RFC 6904 + */ + status = srtp_process_header_encryption(stream, xtn_hdr, session_keys); + if (status) { + return status; + } + } + + /* if we're encrypting, exor keystream into the message */ + if (enc_start) { + status = + srtp_cipher_encrypt(session_keys->rtp_cipher, (uint8_t *)enc_start, + (unsigned int *)&enc_octet_len); + if (status) + return srtp_err_status_cipher_fail; + } + + /* + * if we're authenticating, run authentication function and put result + * into the auth_tag + */ + if (auth_start) { + /* initialize auth func context */ + status = srtp_auth_start(session_keys->rtp_auth); + if (status) + return status; + + /* run auth func over packet */ + status = srtp_auth_update(session_keys->rtp_auth, (uint8_t *)auth_start, + *pkt_octet_len); + if (status) + return status; + + /* run auth func over ROC, put result into auth_tag */ + debug_print(mod_srtp, "estimated packet index: %016" PRIx64, est); + status = srtp_auth_compute(session_keys->rtp_auth, (uint8_t *)&est, 4, + auth_tag); + debug_print(mod_srtp, "srtp auth tag: %s", + srtp_octet_string_hex_string(auth_tag, tag_len)); + if (status) + return srtp_err_status_auth_fail; + } + + if (auth_tag) { + /* increase the packet length by the length of the auth tag */ + *pkt_octet_len += tag_len; + } + + if (use_mki) { + /* increate the packet length by the mki size */ + *pkt_octet_len += mki_size; + } + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_unprotect(srtp_ctx_t *ctx, + void *srtp_hdr, + int *pkt_octet_len) +{ + return srtp_unprotect_mki(ctx, srtp_hdr, pkt_octet_len, 0); +} + +srtp_err_status_t srtp_unprotect_mki(srtp_ctx_t *ctx, + void *srtp_hdr, + int *pkt_octet_len, + unsigned int use_mki) +{ + srtp_hdr_t *hdr = (srtp_hdr_t *)srtp_hdr; + uint32_t *enc_start; /* pointer to start of encrypted portion */ + uint32_t *auth_start; /* pointer to start of auth. portion */ + unsigned int enc_octet_len = 0; /* number of octets in encrypted portion */ + uint8_t *auth_tag = NULL; /* location of auth_tag within packet */ + srtp_xtd_seq_num_t est; /* estimated xtd_seq_num_t of *hdr */ + int delta; /* delta of local pkt idx and that in hdr */ + v128_t iv; + srtp_err_status_t status; + srtp_stream_ctx_t *stream; + uint8_t tmp_tag[SRTP_MAX_TAG_LEN]; + uint32_t tag_len, prefix_len; + srtp_hdr_xtnd_t *xtn_hdr = NULL; + unsigned int mki_size = 0; + srtp_session_keys_t *session_keys = NULL; + int advance_packet_index = 0; + uint32_t roc_to_set = 0; + uint16_t seq_to_set = 0; + + debug_print0(mod_srtp, "function srtp_unprotect"); + + /* we assume the hdr is 32-bit aligned to start */ + + /* Verify RTP header */ + status = srtp_validate_rtp_header(srtp_hdr, pkt_octet_len); + if (status) + return status; + + /* check the packet length - it must at least contain a full header */ + if (*pkt_octet_len < octets_in_rtp_header) + return srtp_err_status_bad_param; + + /* + * look up ssrc in srtp_stream list, and process the packet with + * the appropriate stream. if we haven't seen this stream before, + * there's only one key for this srtp_session, and the cipher + * supports key-sharing, then we assume that a new stream using + * that key has just started up + */ + stream = srtp_get_stream(ctx, hdr->ssrc); + if (stream == NULL) { + if (ctx->stream_template != NULL) { + stream = ctx->stream_template; + debug_print(mod_srtp, "using provisional stream (SSRC: 0x%08x)", + ntohl(hdr->ssrc)); + +/* + * set estimated packet index to sequence number from header, + * and set delta equal to the same value + */ +#ifdef NO_64BIT_MATH + est = (srtp_xtd_seq_num_t)make64(0, ntohs(hdr->seq)); + delta = low32(est); +#else + est = (srtp_xtd_seq_num_t)ntohs(hdr->seq); + delta = (int)est; +#endif + } else { + /* + * no stream corresponding to SSRC found, and we don't do + * key-sharing, so return an error + */ + return srtp_err_status_no_ctx; + } + } else { + status = srtp_get_est_pkt_index(hdr, stream, &est, &delta); + + if (status && (status != srtp_err_status_pkt_idx_adv)) + return status; + + if (status == srtp_err_status_pkt_idx_adv) { + advance_packet_index = 1; + roc_to_set = (uint32_t)(est >> 16); + seq_to_set = (uint16_t)(est & 0xFFFF); + } + + /* check replay database */ + if (!advance_packet_index) { + status = srtp_rdbx_check(&stream->rtp_rdbx, delta); + if (status) + return status; + } + } + +#ifdef NO_64BIT_MATH + debug_print2(mod_srtp, "estimated u_packet index: %08x%08x", high32(est), + low32(est)); +#else + debug_print(mod_srtp, "estimated u_packet index: %016" PRIx64, est); +#endif + + /* Determine if MKI is being used and what session keys should be used */ + if (use_mki) { + session_keys = srtp_get_session_keys( + stream, (uint8_t *)hdr, (const unsigned int *)pkt_octet_len, + &mki_size); + + if (session_keys == NULL) + return srtp_err_status_bad_mki; + } else { + session_keys = &stream->session_keys[0]; + } + + /* + * Check if this is an AEAD stream (GCM mode). If so, then dispatch + * the request to our AEAD handler. + */ + if (session_keys->rtp_cipher->algorithm == SRTP_AES_GCM_128 || + session_keys->rtp_cipher->algorithm == SRTP_AES_GCM_256) { + return srtp_unprotect_aead(ctx, stream, delta, est, srtp_hdr, + (unsigned int *)pkt_octet_len, session_keys, + mki_size); + } + + /* get tag length from stream */ + tag_len = srtp_auth_get_tag_length(session_keys->rtp_auth); + + /* + * set the cipher's IV properly, depending on whatever cipher we + * happen to be using + */ + if (session_keys->rtp_cipher->type->id == SRTP_AES_ICM_128 || + session_keys->rtp_cipher->type->id == SRTP_AES_ICM_192 || + session_keys->rtp_cipher->type->id == SRTP_AES_ICM_256) { + /* aes counter mode */ + iv.v32[0] = 0; + iv.v32[1] = hdr->ssrc; /* still in network order */ +#ifdef NO_64BIT_MATH + iv.v64[1] = be64_to_cpu( + make64((high32(est) << 16) | (low32(est) >> 16), low32(est) << 16)); +#else + iv.v64[1] = be64_to_cpu(est << 16); +#endif + status = srtp_cipher_set_iv(session_keys->rtp_cipher, (uint8_t *)&iv, + srtp_direction_decrypt); + if (!status && session_keys->rtp_xtn_hdr_cipher) { + status = srtp_cipher_set_iv(session_keys->rtp_xtn_hdr_cipher, + (uint8_t *)&iv, srtp_direction_decrypt); + } + } else { +/* no particular format - set the iv to the pakcet index */ +#ifdef NO_64BIT_MATH + iv.v32[0] = 0; + iv.v32[1] = 0; +#else + iv.v64[0] = 0; +#endif + iv.v64[1] = be64_to_cpu(est); + status = srtp_cipher_set_iv(session_keys->rtp_cipher, (uint8_t *)&iv, + srtp_direction_decrypt); + if (!status && session_keys->rtp_xtn_hdr_cipher) { + status = srtp_cipher_set_iv(session_keys->rtp_xtn_hdr_cipher, + (uint8_t *)&iv, srtp_direction_decrypt); + } + } + if (status) + return srtp_err_status_cipher_fail; + +/* shift est, put into network byte order */ +#ifdef NO_64BIT_MATH + est = be64_to_cpu( + make64((high32(est) << 16) | (low32(est) >> 16), low32(est) << 16)); +#else + est = be64_to_cpu(est << 16); +#endif + + /* + * find starting point for decryption and length of data to be + * decrypted - the encrypted portion starts after the rtp header + * extension, if present; otherwise, it starts after the last csrc, + * if any are present + * + * if we're not providing confidentiality, set enc_start to NULL + */ + if (stream->rtp_services & sec_serv_conf) { + enc_start = (uint32_t *)hdr + uint32s_in_rtp_header + hdr->cc; + if (hdr->x == 1) { + xtn_hdr = (srtp_hdr_xtnd_t *)enc_start; + enc_start += (ntohs(xtn_hdr->length) + 1); + } + if (!((uint8_t *)enc_start <= + (uint8_t *)hdr + (*pkt_octet_len - tag_len - mki_size))) + return srtp_err_status_parse_err; + enc_octet_len = (uint32_t)(*pkt_octet_len - tag_len - mki_size - + ((uint8_t *)enc_start - (uint8_t *)hdr)); + } else { + enc_start = NULL; + } + + /* + * if we're providing authentication, set the auth_start and auth_tag + * pointers to the proper locations; otherwise, set auth_start to NULL + * to indicate that no authentication is needed + */ + if (stream->rtp_services & sec_serv_auth) { + auth_start = (uint32_t *)hdr; + auth_tag = (uint8_t *)hdr + *pkt_octet_len - tag_len; + } else { + auth_start = NULL; + auth_tag = NULL; + } + + /* + * if we expect message authentication, run the authentication + * function and compare the result with the value of the auth_tag + */ + if (auth_start) { + /* + * if we're using a universal hash, then we need to compute the + * keystream prefix for encrypting the universal hash output + * + * if the keystream prefix length is zero, then we know that + * the authenticator isn't using a universal hash function + */ + if (session_keys->rtp_auth->prefix_len != 0) { + prefix_len = srtp_auth_get_prefix_length(session_keys->rtp_auth); + status = srtp_cipher_output(session_keys->rtp_cipher, tmp_tag, + &prefix_len); + debug_print(mod_srtp, "keystream prefix: %s", + srtp_octet_string_hex_string(tmp_tag, prefix_len)); + if (status) + return srtp_err_status_cipher_fail; + } + + /* initialize auth func context */ + status = srtp_auth_start(session_keys->rtp_auth); + if (status) + return status; + + /* now compute auth function over packet */ + status = srtp_auth_update(session_keys->rtp_auth, (uint8_t *)auth_start, + *pkt_octet_len - tag_len - mki_size); + if (status) + return status; + + /* run auth func over ROC, then write tmp tag */ + status = srtp_auth_compute(session_keys->rtp_auth, (uint8_t *)&est, 4, + tmp_tag); + + debug_print(mod_srtp, "computed auth tag: %s", + srtp_octet_string_hex_string(tmp_tag, tag_len)); + debug_print(mod_srtp, "packet auth tag: %s", + srtp_octet_string_hex_string(auth_tag, tag_len)); + if (status) + return srtp_err_status_auth_fail; + + if (srtp_octet_string_is_eq(tmp_tag, auth_tag, tag_len)) + return srtp_err_status_auth_fail; + } + + /* + * update the key usage limit, and check it to make sure that we + * didn't just hit either the soft limit or the hard limit, and call + * the event handler if we hit either. + */ + switch (srtp_key_limit_update(session_keys->limit)) { + case srtp_key_event_normal: + break; + case srtp_key_event_soft_limit: + srtp_handle_event(ctx, stream, event_key_soft_limit); + break; + case srtp_key_event_hard_limit: + srtp_handle_event(ctx, stream, event_key_hard_limit); + return srtp_err_status_key_expired; + default: + break; + } + + if (xtn_hdr && session_keys->rtp_xtn_hdr_cipher) { + /* extensions header encryption RFC 6904 */ + status = srtp_process_header_encryption(stream, xtn_hdr, session_keys); + if (status) { + return status; + } + } + + /* if we're decrypting, add keystream into ciphertext */ + if (enc_start) { + status = srtp_cipher_decrypt(session_keys->rtp_cipher, + (uint8_t *)enc_start, &enc_octet_len); + if (status) + return srtp_err_status_cipher_fail; + } + + /* + * verify that stream is for received traffic - this check will + * detect SSRC collisions, since a stream that appears in both + * srtp_protect() and srtp_unprotect() will fail this test in one of + * those functions. + * + * we do this check *after* the authentication check, so that the + * latter check will catch any attempts to fool us into thinking + * that we've got a collision + */ + if (stream->direction != dir_srtp_receiver) { + if (stream->direction == dir_unknown) { + stream->direction = dir_srtp_receiver; + } else { + srtp_handle_event(ctx, stream, event_ssrc_collision); + } + } + + /* + * if the stream is a 'provisional' one, in which the template context + * is used, then we need to allocate a new stream at this point, since + * the authentication passed + */ + if (stream == ctx->stream_template) { + srtp_stream_ctx_t *new_stream; + + /* + * allocate and initialize a new stream + * + * note that we indicate failure if we can't allocate the new + * stream, and some implementations will want to not return + * failure here + */ + status = + srtp_stream_clone(ctx->stream_template, hdr->ssrc, &new_stream); + if (status) + return status; + + /* add new stream to the head of the stream_list */ + new_stream->next = ctx->stream_list; + ctx->stream_list = new_stream; + + /* set stream (the pointer used in this function) */ + stream = new_stream; + } + + /* + * the message authentication function passed, so add the packet + * index into the replay database + */ + if (advance_packet_index) { + srtp_rdbx_set_roc_seq(&stream->rtp_rdbx, roc_to_set, seq_to_set); + stream->pending_roc = 0; + srtp_rdbx_add_index(&stream->rtp_rdbx, 0); + } else { + srtp_rdbx_add_index(&stream->rtp_rdbx, delta); + } + + /* decrease the packet length by the length of the auth tag */ + *pkt_octet_len -= tag_len; + + /* decrease the packet length by the mki size */ + *pkt_octet_len -= mki_size; + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_init() +{ + srtp_err_status_t status; + + /* initialize crypto kernel */ + status = srtp_crypto_kernel_init(); + if (status) + return status; + + /* load srtp debug module into the kernel */ + status = srtp_crypto_kernel_load_debug_module(&mod_srtp); + if (status) + return status; + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_shutdown() +{ + srtp_err_status_t status; + + /* shut down crypto kernel */ + status = srtp_crypto_kernel_shutdown(); + if (status) + return status; + + /* shutting down crypto kernel frees the srtp debug module as well */ + + return srtp_err_status_ok; +} + +/* + * srtp_get_stream(ssrc) returns a pointer to the stream corresponding + * to ssrc, or NULL if no stream exists for that ssrc + * + * this is an internal function + */ + +srtp_stream_ctx_t *srtp_get_stream(srtp_t srtp, uint32_t ssrc) +{ + srtp_stream_ctx_t *stream; + + /* walk down list until ssrc is found */ + stream = srtp->stream_list; + while (stream != NULL) { + if (stream->ssrc == ssrc) + return stream; + stream = stream->next; + } + + /* we haven't found our ssrc, so return a null */ + return NULL; +} + +srtp_err_status_t srtp_dealloc(srtp_t session) +{ + srtp_stream_ctx_t *stream; + srtp_err_status_t status; + + /* + * we take a conservative deallocation strategy - if we encounter an + * error deallocating a stream, then we stop trying to deallocate + * memory and just return an error + */ + + /* walk list of streams, deallocating as we go */ + stream = session->stream_list; + while (stream != NULL) { + srtp_stream_t next = stream->next; + status = srtp_stream_dealloc(stream, session->stream_template); + if (status) + return status; + stream = next; + } + + /* deallocate stream template, if there is one */ + if (session->stream_template != NULL) { + status = srtp_stream_dealloc(session->stream_template, NULL); + if (status) + return status; + } + + /* deallocate session context */ + srtp_crypto_free(session); + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_add_stream(srtp_t session, const srtp_policy_t *policy) +{ + srtp_err_status_t status; + srtp_stream_t tmp; + + status = srtp_valid_policy(policy); + if (status != srtp_err_status_ok) { + return status; + } + + /* sanity check arguments */ + if ((session == NULL) || (policy == NULL) || + (!srtp_validate_policy_master_keys(policy))) + return srtp_err_status_bad_param; + + /* allocate stream */ + status = srtp_stream_alloc(&tmp, policy); + if (status) { + return status; + } + + /* initialize stream */ + status = srtp_stream_init(tmp, policy); + if (status) { + srtp_stream_dealloc(tmp, NULL); + return status; + } + + /* + * set the head of the stream list or the template to point to the + * stream that we've just alloced and init'ed, depending on whether + * or not it has a wildcard SSRC value or not + * + * if the template stream has already been set, then the policy is + * inconsistent, so we return a bad_param error code + */ + switch (policy->ssrc.type) { + case (ssrc_any_outbound): + if (session->stream_template) { + srtp_stream_dealloc(tmp, NULL); + return srtp_err_status_bad_param; + } + session->stream_template = tmp; + session->stream_template->direction = dir_srtp_sender; + break; + case (ssrc_any_inbound): + if (session->stream_template) { + srtp_stream_dealloc(tmp, NULL); + return srtp_err_status_bad_param; + } + session->stream_template = tmp; + session->stream_template->direction = dir_srtp_receiver; + break; + case (ssrc_specific): + tmp->next = session->stream_list; + session->stream_list = tmp; + break; + case (ssrc_undefined): + default: + srtp_stream_dealloc(tmp, NULL); + return srtp_err_status_bad_param; + } + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_create(srtp_t *session, /* handle for session */ + const srtp_policy_t *policy) +{ /* SRTP policy (list) */ + srtp_err_status_t stat; + srtp_ctx_t *ctx; + + stat = srtp_valid_policy(policy); + if (stat != srtp_err_status_ok) { + return stat; + } + + /* sanity check arguments */ + if (session == NULL) + return srtp_err_status_bad_param; + + /* allocate srtp context and set ctx_ptr */ + ctx = (srtp_ctx_t *)srtp_crypto_alloc(sizeof(srtp_ctx_t)); + if (ctx == NULL) + return srtp_err_status_alloc_fail; + *session = ctx; + + /* + * loop over elements in the policy list, allocating and + * initializing a stream for each element + */ + ctx->stream_template = NULL; + ctx->stream_list = NULL; + ctx->user_data = NULL; + while (policy != NULL) { + stat = srtp_add_stream(ctx, policy); + if (stat) { + /* clean up everything */ + srtp_dealloc(*session); + *session = NULL; + return stat; + } + + /* set policy to next item in list */ + policy = policy->next; + } + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_remove_stream(srtp_t session, uint32_t ssrc) +{ + srtp_stream_ctx_t *stream, *last_stream; + srtp_err_status_t status; + + /* sanity check arguments */ + if (session == NULL) + return srtp_err_status_bad_param; + + /* find stream in list; complain if not found */ + last_stream = stream = session->stream_list; + while ((stream != NULL) && (ssrc != stream->ssrc)) { + last_stream = stream; + stream = stream->next; + } + if (stream == NULL) + return srtp_err_status_no_ctx; + + /* remove stream from the list */ + if (last_stream == stream) + /* stream was first in list */ + session->stream_list = stream->next; + else + last_stream->next = stream->next; + + /* deallocate the stream */ + status = srtp_stream_dealloc(stream, session->stream_template); + if (status) + return status; + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_update(srtp_t session, const srtp_policy_t *policy) +{ + srtp_err_status_t stat; + + stat = srtp_valid_policy(policy); + if (stat != srtp_err_status_ok) { + return stat; + } + + /* sanity check arguments */ + if ((session == NULL) || (policy == NULL) || + (!srtp_validate_policy_master_keys(policy))) { + return srtp_err_status_bad_param; + } + + while (policy != NULL) { + stat = srtp_update_stream(session, policy); + if (stat) { + return stat; + } + + /* set policy to next item in list */ + policy = policy->next; + } + return srtp_err_status_ok; +} + +static srtp_err_status_t update_template_streams(srtp_t session, + const srtp_policy_t *policy) +{ + srtp_err_status_t status; + srtp_stream_t new_stream_template; + srtp_stream_t new_stream_list = NULL; + + status = srtp_valid_policy(policy); + if (status != srtp_err_status_ok) { + return status; + } + + if (session->stream_template == NULL) { + return srtp_err_status_bad_param; + } + + /* allocate new template stream */ + status = srtp_stream_alloc(&new_stream_template, policy); + if (status) { + return status; + } + + /* initialize new template stream */ + status = srtp_stream_init(new_stream_template, policy); + if (status) { + srtp_crypto_free(new_stream_template); + return status; + } + + /* for all old templated streams */ + for (;;) { + srtp_stream_t stream; + uint32_t ssrc; + srtp_xtd_seq_num_t old_index; + srtp_rdb_t old_rtcp_rdb; + + stream = session->stream_list; + while ((stream != NULL) && + (stream->session_keys[0].rtp_auth != + session->stream_template->session_keys[0].rtp_auth)) { + stream = stream->next; + } + if (stream == NULL) { + /* no more templated streams */ + break; + } + + /* save old extendard seq */ + ssrc = stream->ssrc; + old_index = stream->rtp_rdbx.index; + old_rtcp_rdb = stream->rtcp_rdb; + + /* remove stream */ + status = srtp_remove_stream(session, ssrc); + if (status) { + /* free new allocations */ + while (new_stream_list != NULL) { + srtp_stream_t next = new_stream_list->next; + srtp_stream_dealloc(new_stream_list, new_stream_template); + new_stream_list = next; + } + srtp_stream_dealloc(new_stream_template, NULL); + return status; + } + + /* allocate and initialize a new stream */ + status = srtp_stream_clone(new_stream_template, ssrc, &stream); + if (status) { + /* free new allocations */ + while (new_stream_list != NULL) { + srtp_stream_t next = new_stream_list->next; + srtp_stream_dealloc(new_stream_list, new_stream_template); + new_stream_list = next; + } + srtp_stream_dealloc(new_stream_template, NULL); + return status; + } + + /* add new stream to the head of the new_stream_list */ + stream->next = new_stream_list; + new_stream_list = stream; + + /* restore old extended seq */ + stream->rtp_rdbx.index = old_index; + stream->rtcp_rdb = old_rtcp_rdb; + } + /* dealloc old template */ + srtp_stream_dealloc(session->stream_template, NULL); + /* set new template */ + session->stream_template = new_stream_template; + /* add new list */ + if (new_stream_list) { + srtp_stream_t tail = new_stream_list; + while (tail->next) { + tail = tail->next; + } + tail->next = session->stream_list; + session->stream_list = new_stream_list; + } + return status; +} + +static srtp_err_status_t update_stream(srtp_t session, + const srtp_policy_t *policy) +{ + srtp_err_status_t status; + srtp_xtd_seq_num_t old_index; + srtp_rdb_t old_rtcp_rdb; + srtp_stream_t stream; + + status = srtp_valid_policy(policy); + if (status != srtp_err_status_ok) { + return status; + } + + stream = srtp_get_stream(session, htonl(policy->ssrc.value)); + if (stream == NULL) { + return srtp_err_status_bad_param; + } + + /* save old extendard seq */ + old_index = stream->rtp_rdbx.index; + old_rtcp_rdb = stream->rtcp_rdb; + + status = srtp_remove_stream(session, htonl(policy->ssrc.value)); + if (status) { + return status; + } + + status = srtp_add_stream(session, policy); + if (status) { + return status; + } + + stream = srtp_get_stream(session, htonl(policy->ssrc.value)); + if (stream == NULL) { + return srtp_err_status_fail; + } + + /* restore old extended seq */ + stream->rtp_rdbx.index = old_index; + stream->rtcp_rdb = old_rtcp_rdb; + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_update_stream(srtp_t session, + const srtp_policy_t *policy) +{ + srtp_err_status_t status; + + status = srtp_valid_policy(policy); + if (status != srtp_err_status_ok) { + return status; + } + + /* sanity check arguments */ + if ((session == NULL) || (policy == NULL) || + (!srtp_validate_policy_master_keys(policy))) + return srtp_err_status_bad_param; + + switch (policy->ssrc.type) { + case (ssrc_any_outbound): + case (ssrc_any_inbound): + status = update_template_streams(session, policy); + break; + case (ssrc_specific): + status = update_stream(session, policy); + break; + case (ssrc_undefined): + default: + return srtp_err_status_bad_param; + } + + return status; +} + +/* + * The default policy - provides a convenient way for callers to use + * the default security policy + * + * The default policy is defined in RFC 3711 + * (Section 5. Default and mandatory-to-implement Transforms) + * + */ + +/* + * NOTE: cipher_key_len is really key len (128 bits) plus salt len + * (112 bits) + */ +/* There are hard-coded 16's for base_key_len in the key generation code */ + +void srtp_crypto_policy_set_rtp_default(srtp_crypto_policy_t *p) +{ + p->cipher_type = SRTP_AES_ICM_128; + p->cipher_key_len = + SRTP_AES_ICM_128_KEY_LEN_WSALT; /* default 128 bits per RFC 3711 */ + p->auth_type = SRTP_HMAC_SHA1; + p->auth_key_len = 20; /* default 160 bits per RFC 3711 */ + p->auth_tag_len = 10; /* default 80 bits per RFC 3711 */ + p->sec_serv = sec_serv_conf_and_auth; +} + +void srtp_crypto_policy_set_rtcp_default(srtp_crypto_policy_t *p) +{ + p->cipher_type = SRTP_AES_ICM_128; + p->cipher_key_len = + SRTP_AES_ICM_128_KEY_LEN_WSALT; /* default 128 bits per RFC 3711 */ + p->auth_type = SRTP_HMAC_SHA1; + p->auth_key_len = 20; /* default 160 bits per RFC 3711 */ + p->auth_tag_len = 10; /* default 80 bits per RFC 3711 */ + p->sec_serv = sec_serv_conf_and_auth; +} + +void srtp_crypto_policy_set_aes_cm_128_hmac_sha1_32(srtp_crypto_policy_t *p) +{ + /* + * corresponds to RFC 4568 + * + * note that this crypto policy is intended for SRTP, but not SRTCP + */ + + p->cipher_type = SRTP_AES_ICM_128; + p->cipher_key_len = + SRTP_AES_ICM_128_KEY_LEN_WSALT; /* 128 bit key, 112 bit salt */ + p->auth_type = SRTP_HMAC_SHA1; + p->auth_key_len = 20; /* 160 bit key */ + p->auth_tag_len = 4; /* 32 bit tag */ + p->sec_serv = sec_serv_conf_and_auth; +} + +void srtp_crypto_policy_set_aes_cm_128_null_auth(srtp_crypto_policy_t *p) +{ + /* + * corresponds to RFC 4568 + * + * note that this crypto policy is intended for SRTP, but not SRTCP + */ + + p->cipher_type = SRTP_AES_ICM_128; + p->cipher_key_len = + SRTP_AES_ICM_128_KEY_LEN_WSALT; /* 128 bit key, 112 bit salt */ + p->auth_type = SRTP_NULL_AUTH; + p->auth_key_len = 0; + p->auth_tag_len = 0; + p->sec_serv = sec_serv_conf; +} + +void srtp_crypto_policy_set_null_cipher_hmac_sha1_80(srtp_crypto_policy_t *p) +{ + /* + * corresponds to RFC 4568 + */ + + p->cipher_type = SRTP_NULL_CIPHER; + p->cipher_key_len = 16; + p->auth_type = SRTP_HMAC_SHA1; + p->auth_key_len = 20; + p->auth_tag_len = 10; + p->sec_serv = sec_serv_auth; +} + +void srtp_crypto_policy_set_null_cipher_hmac_null(srtp_crypto_policy_t *p) +{ + /* + * Should only be used for testing + */ + + p->cipher_type = SRTP_NULL_CIPHER; + p->cipher_key_len = 16; + p->auth_type = SRTP_NULL_AUTH; + p->auth_key_len = 0; + p->auth_tag_len = 0; + p->sec_serv = sec_serv_none; +} + +void srtp_crypto_policy_set_aes_cm_256_hmac_sha1_80(srtp_crypto_policy_t *p) +{ + /* + * corresponds to RFC 6188 + */ + + p->cipher_type = SRTP_AES_ICM_256; + p->cipher_key_len = SRTP_AES_ICM_256_KEY_LEN_WSALT; + p->auth_type = SRTP_HMAC_SHA1; + p->auth_key_len = 20; /* default 160 bits per RFC 3711 */ + p->auth_tag_len = 10; /* default 80 bits per RFC 3711 */ + p->sec_serv = sec_serv_conf_and_auth; +} + +void srtp_crypto_policy_set_aes_cm_256_hmac_sha1_32(srtp_crypto_policy_t *p) +{ + /* + * corresponds to RFC 6188 + * + * note that this crypto policy is intended for SRTP, but not SRTCP + */ + + p->cipher_type = SRTP_AES_ICM_256; + p->cipher_key_len = SRTP_AES_ICM_256_KEY_LEN_WSALT; + p->auth_type = SRTP_HMAC_SHA1; + p->auth_key_len = 20; /* default 160 bits per RFC 3711 */ + p->auth_tag_len = 4; /* default 80 bits per RFC 3711 */ + p->sec_serv = sec_serv_conf_and_auth; +} + +/* + * AES-256 with no authentication. + */ +void srtp_crypto_policy_set_aes_cm_256_null_auth(srtp_crypto_policy_t *p) +{ + p->cipher_type = SRTP_AES_ICM_256; + p->cipher_key_len = SRTP_AES_ICM_256_KEY_LEN_WSALT; + p->auth_type = SRTP_NULL_AUTH; + p->auth_key_len = 0; + p->auth_tag_len = 0; + p->sec_serv = sec_serv_conf; +} + +void srtp_crypto_policy_set_aes_cm_192_hmac_sha1_80(srtp_crypto_policy_t *p) +{ + /* + * corresponds to RFC 6188 + */ + + p->cipher_type = SRTP_AES_ICM_192; + p->cipher_key_len = SRTP_AES_ICM_192_KEY_LEN_WSALT; + p->auth_type = SRTP_HMAC_SHA1; + p->auth_key_len = 20; /* default 160 bits per RFC 3711 */ + p->auth_tag_len = 10; /* default 80 bits per RFC 3711 */ + p->sec_serv = sec_serv_conf_and_auth; +} + +void srtp_crypto_policy_set_aes_cm_192_hmac_sha1_32(srtp_crypto_policy_t *p) +{ + /* + * corresponds to RFC 6188 + * + * note that this crypto policy is intended for SRTP, but not SRTCP + */ + + p->cipher_type = SRTP_AES_ICM_192; + p->cipher_key_len = SRTP_AES_ICM_192_KEY_LEN_WSALT; + p->auth_type = SRTP_HMAC_SHA1; + p->auth_key_len = 20; /* default 160 bits per RFC 3711 */ + p->auth_tag_len = 4; /* default 80 bits per RFC 3711 */ + p->sec_serv = sec_serv_conf_and_auth; +} + +/* + * AES-192 with no authentication. + */ +void srtp_crypto_policy_set_aes_cm_192_null_auth(srtp_crypto_policy_t *p) +{ + p->cipher_type = SRTP_AES_ICM_192; + p->cipher_key_len = SRTP_AES_ICM_192_KEY_LEN_WSALT; + p->auth_type = SRTP_NULL_AUTH; + p->auth_key_len = 0; + p->auth_tag_len = 0; + p->sec_serv = sec_serv_conf; +} + +/* + * AES-128 GCM mode with 8 octet auth tag. + */ +void srtp_crypto_policy_set_aes_gcm_128_8_auth(srtp_crypto_policy_t *p) +{ + p->cipher_type = SRTP_AES_GCM_128; + p->cipher_key_len = SRTP_AES_GCM_128_KEY_LEN_WSALT; + p->auth_type = SRTP_NULL_AUTH; /* GCM handles the auth for us */ + p->auth_key_len = 0; + p->auth_tag_len = 8; /* 8 octet tag length */ + p->sec_serv = sec_serv_conf_and_auth; +} + +/* + * AES-256 GCM mode with 8 octet auth tag. + */ +void srtp_crypto_policy_set_aes_gcm_256_8_auth(srtp_crypto_policy_t *p) +{ + p->cipher_type = SRTP_AES_GCM_256; + p->cipher_key_len = SRTP_AES_GCM_256_KEY_LEN_WSALT; + p->auth_type = SRTP_NULL_AUTH; /* GCM handles the auth for us */ + p->auth_key_len = 0; + p->auth_tag_len = 8; /* 8 octet tag length */ + p->sec_serv = sec_serv_conf_and_auth; +} + +/* + * AES-128 GCM mode with 8 octet auth tag, no RTCP encryption. + */ +void srtp_crypto_policy_set_aes_gcm_128_8_only_auth(srtp_crypto_policy_t *p) +{ + p->cipher_type = SRTP_AES_GCM_128; + p->cipher_key_len = SRTP_AES_GCM_128_KEY_LEN_WSALT; + p->auth_type = SRTP_NULL_AUTH; /* GCM handles the auth for us */ + p->auth_key_len = 0; + p->auth_tag_len = 8; /* 8 octet tag length */ + p->sec_serv = sec_serv_auth; /* This only applies to RTCP */ +} + +/* + * AES-256 GCM mode with 8 octet auth tag, no RTCP encryption. + */ +void srtp_crypto_policy_set_aes_gcm_256_8_only_auth(srtp_crypto_policy_t *p) +{ + p->cipher_type = SRTP_AES_GCM_256; + p->cipher_key_len = SRTP_AES_GCM_256_KEY_LEN_WSALT; + p->auth_type = SRTP_NULL_AUTH; /* GCM handles the auth for us */ + p->auth_key_len = 0; + p->auth_tag_len = 8; /* 8 octet tag length */ + p->sec_serv = sec_serv_auth; /* This only applies to RTCP */ +} + +/* + * AES-128 GCM mode with 16 octet auth tag. + */ +void srtp_crypto_policy_set_aes_gcm_128_16_auth(srtp_crypto_policy_t *p) +{ + p->cipher_type = SRTP_AES_GCM_128; + p->cipher_key_len = SRTP_AES_GCM_128_KEY_LEN_WSALT; + p->auth_type = SRTP_NULL_AUTH; /* GCM handles the auth for us */ + p->auth_key_len = 0; + p->auth_tag_len = 16; /* 16 octet tag length */ + p->sec_serv = sec_serv_conf_and_auth; +} + +/* + * AES-256 GCM mode with 16 octet auth tag. + */ +void srtp_crypto_policy_set_aes_gcm_256_16_auth(srtp_crypto_policy_t *p) +{ + p->cipher_type = SRTP_AES_GCM_256; + p->cipher_key_len = SRTP_AES_GCM_256_KEY_LEN_WSALT; + p->auth_type = SRTP_NULL_AUTH; /* GCM handles the auth for us */ + p->auth_key_len = 0; + p->auth_tag_len = 16; /* 16 octet tag length */ + p->sec_serv = sec_serv_conf_and_auth; +} + +/* + * secure rtcp functions + */ + +/* + * AEAD uses a new IV formation method. This function implements + * section 9.1 (SRTCP IV Formation for AES-GCM) from RFC7714. + * The calculation is defined as, where (+) is the xor operation: + * + * 0 1 2 3 4 5 6 7 8 9 10 11 + * +--+--+--+--+--+--+--+--+--+--+--+--+ + * |00|00| SSRC |00|00|0+SRTCP Idx|---+ + * +--+--+--+--+--+--+--+--+--+--+--+--+ | + * | + * +--+--+--+--+--+--+--+--+--+--+--+--+ | + * | Encryption Salt |->(+) + * +--+--+--+--+--+--+--+--+--+--+--+--+ | + * | + * +--+--+--+--+--+--+--+--+--+--+--+--+ | + * | Initialization Vector |<--+ + * +--+--+--+--+--+--+--+--+--+--+--+--+* + * + * Input: *session_keys - pointer to SRTP stream context session keys, + * used to retrieve the SALT + * *iv - Pointer to recieve the calculated IV + * seq_num - The SEQ value to use for the IV calculation. + * *hdr - The RTP header, used to get the SSRC value + * + * Returns: srtp_err_status_ok if no error or srtp_err_status_bad_param + * if seq_num is invalid + * + */ +static srtp_err_status_t srtp_calc_aead_iv_srtcp( + srtp_session_keys_t *session_keys, + v128_t *iv, + uint32_t seq_num, + srtcp_hdr_t *hdr) +{ + v128_t in; + v128_t salt; + + memset(&in, 0, sizeof(v128_t)); + memset(&salt, 0, sizeof(v128_t)); + + in.v16[0] = 0; + memcpy(&in.v16[1], &hdr->ssrc, 4); /* still in network order! */ + in.v16[3] = 0; + + /* + * The SRTCP index (seq_num) spans bits 0 through 30 inclusive. + * The most significant bit should be zero. + */ + if (seq_num & 0x80000000UL) { + return srtp_err_status_bad_param; + } + in.v32[2] = htonl(seq_num); + + debug_print(mod_srtp, "Pre-salted RTCP IV = %s\n", v128_hex_string(&in)); + + /* + * Get the SALT value from the context + */ + memcpy(salt.v8, session_keys->c_salt, 12); + debug_print(mod_srtp, "RTCP SALT = %s\n", v128_hex_string(&salt)); + + /* + * Finally, apply the SALT to the input + */ + v128_xor(iv, &in, &salt); + + return srtp_err_status_ok; +} + +/* + * This code handles AEAD ciphers for outgoing RTCP. We currently support + * AES-GCM mode with 128 or 256 bit keys. + */ +static srtp_err_status_t srtp_protect_rtcp_aead( + srtp_t ctx, + srtp_stream_ctx_t *stream, + void *rtcp_hdr, + unsigned int *pkt_octet_len, + srtp_session_keys_t *session_keys, + unsigned int use_mki) +{ + srtcp_hdr_t *hdr = (srtcp_hdr_t *)rtcp_hdr; + uint32_t *enc_start; /* pointer to start of encrypted portion */ + uint32_t *trailer_p; /* pointer to start of trailer */ + uint32_t trailer; /* trailer value */ + unsigned int enc_octet_len = 0; /* number of octets in encrypted portion */ + uint8_t *auth_tag = NULL; /* location of auth_tag within packet */ + srtp_err_status_t status; + uint32_t tag_len; + uint32_t seq_num; + v128_t iv; + uint32_t tseq; + unsigned int mki_size = 0; + + /* get tag length from stream context */ + tag_len = srtp_auth_get_tag_length(session_keys->rtcp_auth); + + /* + * set encryption start and encryption length - if we're not + * providing confidentiality, set enc_start to NULL + */ + enc_start = (uint32_t *)hdr + uint32s_in_rtcp_header; + enc_octet_len = *pkt_octet_len - octets_in_rtcp_header; + + /* NOTE: hdr->length is not usable - it refers to only the first + * RTCP report in the compound packet! + */ + trailer_p = (uint32_t *)((char *)enc_start + enc_octet_len + tag_len); + + if (stream->rtcp_services & sec_serv_conf) { + trailer = htonl(SRTCP_E_BIT); /* set encrypt bit */ + } else { + enc_start = NULL; + enc_octet_len = 0; + /* 0 is network-order independant */ + trailer = 0x00000000; /* set encrypt bit */ + } + + mki_size = srtp_inject_mki((uint8_t *)hdr + *pkt_octet_len + tag_len + + sizeof(srtcp_trailer_t), + session_keys, use_mki); + + /* + * set the auth_tag pointer to the proper location, which is after + * the payload, but before the trailer + * (note that srtpc *always* provides authentication, unlike srtp) + */ + /* Note: This would need to change for optional mikey data */ + auth_tag = (uint8_t *)hdr + *pkt_octet_len; + + /* + * check sequence number for overruns, and copy it into the packet + * if its value isn't too big + */ + status = srtp_rdb_increment(&stream->rtcp_rdb); + if (status) { + return status; + } + seq_num = srtp_rdb_get_value(&stream->rtcp_rdb); + trailer |= htonl(seq_num); + debug_print(mod_srtp, "srtcp index: %x", seq_num); + + memcpy(trailer_p, &trailer, sizeof(trailer)); + + /* + * Calculate and set the IV + */ + status = srtp_calc_aead_iv_srtcp(session_keys, &iv, seq_num, hdr); + if (status) { + return srtp_err_status_cipher_fail; + } + status = srtp_cipher_set_iv(session_keys->rtcp_cipher, (uint8_t *)&iv, + srtp_direction_encrypt); + if (status) { + return srtp_err_status_cipher_fail; + } + + /* + * Set the AAD for GCM mode + */ + if (enc_start) { + /* + * If payload encryption is enabled, then the AAD consist of + * the RTCP header and the seq# at the end of the packet + */ + status = srtp_cipher_set_aad(session_keys->rtcp_cipher, (uint8_t *)hdr, + octets_in_rtcp_header); + if (status) { + return (srtp_err_status_cipher_fail); + } + } else { + /* + * Since payload encryption is not enabled, we must authenticate + * the entire packet as described in RFC 7714 (Section 9.3. Data + * Types in Unencrypted SRTCP Compound Packets) + */ + status = srtp_cipher_set_aad(session_keys->rtcp_cipher, (uint8_t *)hdr, + *pkt_octet_len); + if (status) { + return (srtp_err_status_cipher_fail); + } + } + /* + * Process the sequence# as AAD + */ + tseq = trailer; + status = srtp_cipher_set_aad(session_keys->rtcp_cipher, (uint8_t *)&tseq, + sizeof(srtcp_trailer_t)); + if (status) { + return (srtp_err_status_cipher_fail); + } + + /* if we're encrypting, exor keystream into the message */ + if (enc_start) { + status = srtp_cipher_encrypt(session_keys->rtcp_cipher, + (uint8_t *)enc_start, &enc_octet_len); + if (status) { + return srtp_err_status_cipher_fail; + } + /* + * Get the tag and append that to the output + */ + status = srtp_cipher_get_tag(session_keys->rtcp_cipher, + (uint8_t *)auth_tag, &tag_len); + if (status) { + return (srtp_err_status_cipher_fail); + } + enc_octet_len += tag_len; + } else { + /* + * Even though we're not encrypting the payload, we need + * to run the cipher to get the auth tag. + */ + unsigned int nolen = 0; + status = srtp_cipher_encrypt(session_keys->rtcp_cipher, NULL, &nolen); + if (status) { + return srtp_err_status_cipher_fail; + } + /* + * Get the tag and append that to the output + */ + status = srtp_cipher_get_tag(session_keys->rtcp_cipher, + (uint8_t *)auth_tag, &tag_len); + if (status) { + return (srtp_err_status_cipher_fail); + } + enc_octet_len += tag_len; + } + + /* increase the packet length by the length of the auth tag and seq_num*/ + *pkt_octet_len += (tag_len + sizeof(srtcp_trailer_t)); + + /* increase the packet by the mki_size */ + *pkt_octet_len += mki_size; + + return srtp_err_status_ok; +} + +/* + * This function handles incoming SRTCP packets while in AEAD mode, + * which currently supports AES-GCM encryption. Note, the auth tag is + * at the end of the packet stream and is automatically checked by GCM + * when decrypting the payload. + */ +static srtp_err_status_t srtp_unprotect_rtcp_aead( + srtp_t ctx, + srtp_stream_ctx_t *stream, + void *srtcp_hdr, + unsigned int *pkt_octet_len, + srtp_session_keys_t *session_keys, + unsigned int use_mki) +{ + srtcp_hdr_t *hdr = (srtcp_hdr_t *)srtcp_hdr; + uint32_t *enc_start; /* pointer to start of encrypted portion */ + uint32_t *trailer_p; /* pointer to start of trailer */ + uint32_t trailer; /* trailer value */ + unsigned int enc_octet_len = 0; /* number of octets in encrypted portion */ + uint8_t *auth_tag = NULL; /* location of auth_tag within packet */ + srtp_err_status_t status; + int tag_len; + unsigned int tmp_len; + uint32_t seq_num; + v128_t iv; + uint32_t tseq; + unsigned int mki_size = 0; + + /* get tag length from stream context */ + tag_len = srtp_auth_get_tag_length(session_keys->rtcp_auth); + + if (use_mki) { + mki_size = session_keys->mki_size; + } + + /* + * set encryption start, encryption length, and trailer + */ + /* index & E (encryption) bit follow normal data. hdr->len is the number of + * words (32-bit) in the normal packet minus 1 + */ + /* This should point trailer to the word past the end of the normal data. */ + /* This would need to be modified for optional mikey data */ + trailer_p = (uint32_t *)((char *)hdr + *pkt_octet_len - + sizeof(srtcp_trailer_t) - mki_size); + memcpy(&trailer, trailer_p, sizeof(trailer)); + + /* + * We pass the tag down to the cipher when doing GCM mode + */ + enc_octet_len = *pkt_octet_len - (octets_in_rtcp_header + + sizeof(srtcp_trailer_t) + mki_size); + auth_tag = (uint8_t *)hdr + *pkt_octet_len - tag_len - mki_size - + sizeof(srtcp_trailer_t); + + if (*((unsigned char *)trailer_p) & SRTCP_E_BYTE_BIT) { + enc_start = (uint32_t *)hdr + uint32s_in_rtcp_header; + } else { + enc_octet_len = 0; + enc_start = NULL; /* this indicates that there's no encryption */ + } + + /* + * check the sequence number for replays + */ + /* this is easier than dealing with bitfield access */ + seq_num = ntohl(trailer) & SRTCP_INDEX_MASK; + debug_print(mod_srtp, "srtcp index: %x", seq_num); + status = srtp_rdb_check(&stream->rtcp_rdb, seq_num); + if (status) { + return status; + } + + /* + * Calculate and set the IV + */ + status = srtp_calc_aead_iv_srtcp(session_keys, &iv, seq_num, hdr); + if (status) { + return srtp_err_status_cipher_fail; + } + status = srtp_cipher_set_iv(session_keys->rtcp_cipher, (uint8_t *)&iv, + srtp_direction_decrypt); + if (status) { + return srtp_err_status_cipher_fail; + } + + /* + * Set the AAD for GCM mode + */ + if (enc_start) { + /* + * If payload encryption is enabled, then the AAD consist of + * the RTCP header and the seq# at the end of the packet + */ + status = srtp_cipher_set_aad(session_keys->rtcp_cipher, (uint8_t *)hdr, + octets_in_rtcp_header); + if (status) { + return (srtp_err_status_cipher_fail); + } + } else { + /* + * Since payload encryption is not enabled, we must authenticate + * the entire packet as described in RFC 7714 (Section 9.3. Data + * Types in Unencrypted SRTCP Compound Packets) + */ + status = srtp_cipher_set_aad( + session_keys->rtcp_cipher, (uint8_t *)hdr, + (*pkt_octet_len - tag_len - sizeof(srtcp_trailer_t) - mki_size)); + if (status) { + return (srtp_err_status_cipher_fail); + } + } + + /* + * Process the sequence# as AAD + */ + tseq = trailer; + status = srtp_cipher_set_aad(session_keys->rtcp_cipher, (uint8_t *)&tseq, + sizeof(srtcp_trailer_t)); + if (status) { + return (srtp_err_status_cipher_fail); + } + + /* if we're decrypting, exor keystream into the message */ + if (enc_start) { + status = srtp_cipher_decrypt(session_keys->rtcp_cipher, + (uint8_t *)enc_start, &enc_octet_len); + if (status) { + return status; + } + } else { + /* + * Still need to run the cipher to check the tag + */ + tmp_len = tag_len; + status = srtp_cipher_decrypt(session_keys->rtcp_cipher, + (uint8_t *)auth_tag, &tmp_len); + if (status) { + return status; + } + } + + /* decrease the packet length by the length of the auth tag and seq_num*/ + *pkt_octet_len -= (tag_len + sizeof(srtcp_trailer_t) + mki_size); + + /* + * verify that stream is for received traffic - this check will + * detect SSRC collisions, since a stream that appears in both + * srtp_protect() and srtp_unprotect() will fail this test in one of + * those functions. + * + * we do this check *after* the authentication check, so that the + * latter check will catch any attempts to fool us into thinking + * that we've got a collision + */ + if (stream->direction != dir_srtp_receiver) { + if (stream->direction == dir_unknown) { + stream->direction = dir_srtp_receiver; + } else { + srtp_handle_event(ctx, stream, event_ssrc_collision); + } + } + + /* + * if the stream is a 'provisional' one, in which the template context + * is used, then we need to allocate a new stream at this point, since + * the authentication passed + */ + if (stream == ctx->stream_template) { + srtp_stream_ctx_t *new_stream; + + /* + * allocate and initialize a new stream + * + * note that we indicate failure if we can't allocate the new + * stream, and some implementations will want to not return + * failure here + */ + status = + srtp_stream_clone(ctx->stream_template, hdr->ssrc, &new_stream); + if (status) { + return status; + } + + /* add new stream to the head of the stream_list */ + new_stream->next = ctx->stream_list; + ctx->stream_list = new_stream; + + /* set stream (the pointer used in this function) */ + stream = new_stream; + } + + /* we've passed the authentication check, so add seq_num to the rdb */ + srtp_rdb_add_index(&stream->rtcp_rdb, seq_num); + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_protect_rtcp(srtp_t ctx, + void *rtcp_hdr, + int *pkt_octet_len) +{ + return srtp_protect_rtcp_mki(ctx, rtcp_hdr, pkt_octet_len, 0, 0); +} + +srtp_err_status_t srtp_protect_rtcp_mki(srtp_t ctx, + void *rtcp_hdr, + int *pkt_octet_len, + unsigned int use_mki, + unsigned int mki_index) +{ + srtcp_hdr_t *hdr = (srtcp_hdr_t *)rtcp_hdr; + uint32_t *enc_start; /* pointer to start of encrypted portion */ + uint32_t *auth_start; /* pointer to start of auth. portion */ + uint32_t *trailer_p; /* pointer to start of trailer */ + uint32_t trailer; /* trailer value */ + unsigned int enc_octet_len = 0; /* number of octets in encrypted portion */ + uint8_t *auth_tag = NULL; /* location of auth_tag within packet */ + srtp_err_status_t status; + int tag_len; + srtp_stream_ctx_t *stream; + uint32_t prefix_len; + uint32_t seq_num; + unsigned int mki_size = 0; + srtp_session_keys_t *session_keys = NULL; + + /* we assume the hdr is 32-bit aligned to start */ + + /* check the packet length - it must at least contain a full header */ + if (*pkt_octet_len < octets_in_rtcp_header) + return srtp_err_status_bad_param; + + /* + * look up ssrc in srtp_stream list, and process the packet with + * the appropriate stream. if we haven't seen this stream before, + * there's only one key for this srtp_session, and the cipher + * supports key-sharing, then we assume that a new stream using + * that key has just started up + */ + stream = srtp_get_stream(ctx, hdr->ssrc); + if (stream == NULL) { + if (ctx->stream_template != NULL) { + srtp_stream_ctx_t *new_stream; + + /* allocate and initialize a new stream */ + status = + srtp_stream_clone(ctx->stream_template, hdr->ssrc, &new_stream); + if (status) + return status; + + /* add new stream to the head of the stream_list */ + new_stream->next = ctx->stream_list; + ctx->stream_list = new_stream; + + /* set stream (the pointer used in this function) */ + stream = new_stream; + } else { + /* no template stream, so we return an error */ + return srtp_err_status_no_ctx; + } + } + + /* + * verify that stream is for sending traffic - this check will + * detect SSRC collisions, since a stream that appears in both + * srtp_protect() and srtp_unprotect() will fail this test in one of + * those functions. + */ + if (stream->direction != dir_srtp_sender) { + if (stream->direction == dir_unknown) { + stream->direction = dir_srtp_sender; + } else { + srtp_handle_event(ctx, stream, event_ssrc_collision); + } + } + + session_keys = + srtp_get_session_keys_with_mki_index(stream, use_mki, mki_index); + + if (session_keys == NULL) + return srtp_err_status_bad_mki; + + /* + * Check if this is an AEAD stream (GCM mode). If so, then dispatch + * the request to our AEAD handler. + */ + if (session_keys->rtp_cipher->algorithm == SRTP_AES_GCM_128 || + session_keys->rtp_cipher->algorithm == SRTP_AES_GCM_256) { + return srtp_protect_rtcp_aead(ctx, stream, rtcp_hdr, + (unsigned int *)pkt_octet_len, + session_keys, use_mki); + } + + /* get tag length from stream context */ + tag_len = srtp_auth_get_tag_length(session_keys->rtcp_auth); + + /* + * set encryption start and encryption length - if we're not + * providing confidentiality, set enc_start to NULL + */ + enc_start = (uint32_t *)hdr + uint32s_in_rtcp_header; + enc_octet_len = *pkt_octet_len - octets_in_rtcp_header; + + /* all of the packet, except the header, gets encrypted */ + /* + * NOTE: hdr->length is not usable - it refers to only the first RTCP report + * in the compound packet! + */ + trailer_p = (uint32_t *)((char *)enc_start + enc_octet_len); + + if (stream->rtcp_services & sec_serv_conf) { + trailer = htonl(SRTCP_E_BIT); /* set encrypt bit */ + } else { + enc_start = NULL; + enc_octet_len = 0; + /* 0 is network-order independant */ + trailer = 0x00000000; /* set encrypt bit */ + } + + mki_size = srtp_inject_mki((uint8_t *)hdr + *pkt_octet_len + + sizeof(srtcp_trailer_t), + session_keys, use_mki); + + /* + * set the auth_start and auth_tag pointers to the proper locations + * (note that srtpc *always* provides authentication, unlike srtp) + */ + /* Note: This would need to change for optional mikey data */ + auth_start = (uint32_t *)hdr; + auth_tag = + (uint8_t *)hdr + *pkt_octet_len + sizeof(srtcp_trailer_t) + mki_size; + + /* + * check sequence number for overruns, and copy it into the packet + * if its value isn't too big + */ + status = srtp_rdb_increment(&stream->rtcp_rdb); + if (status) + return status; + seq_num = srtp_rdb_get_value(&stream->rtcp_rdb); + trailer |= htonl(seq_num); + debug_print(mod_srtp, "srtcp index: %x", seq_num); + + memcpy(trailer_p, &trailer, sizeof(trailer)); + + /* + * if we're using rindael counter mode, set nonce and seq + */ + if (session_keys->rtcp_cipher->type->id == SRTP_AES_ICM_128 || + session_keys->rtcp_cipher->type->id == SRTP_AES_ICM_192 || + session_keys->rtcp_cipher->type->id == SRTP_AES_ICM_256) { + v128_t iv; + + iv.v32[0] = 0; + iv.v32[1] = hdr->ssrc; /* still in network order! */ + iv.v32[2] = htonl(seq_num >> 16); + iv.v32[3] = htonl(seq_num << 16); + status = srtp_cipher_set_iv(session_keys->rtcp_cipher, (uint8_t *)&iv, + srtp_direction_encrypt); + + } else { + v128_t iv; + + /* otherwise, just set the index to seq_num */ + iv.v32[0] = 0; + iv.v32[1] = 0; + iv.v32[2] = 0; + iv.v32[3] = htonl(seq_num); + status = srtp_cipher_set_iv(session_keys->rtcp_cipher, (uint8_t *)&iv, + srtp_direction_encrypt); + } + if (status) + return srtp_err_status_cipher_fail; + + /* + * if we're authenticating using a universal hash, put the keystream + * prefix into the authentication tag + */ + + /* if auth_start is non-null, then put keystream into tag */ + if (auth_start) { + /* put keystream prefix into auth_tag */ + prefix_len = srtp_auth_get_prefix_length(session_keys->rtcp_auth); + status = srtp_cipher_output(session_keys->rtcp_cipher, auth_tag, + &prefix_len); + + debug_print(mod_srtp, "keystream prefix: %s", + srtp_octet_string_hex_string(auth_tag, prefix_len)); + + if (status) + return srtp_err_status_cipher_fail; + } + + /* if we're encrypting, exor keystream into the message */ + if (enc_start) { + status = srtp_cipher_encrypt(session_keys->rtcp_cipher, + (uint8_t *)enc_start, &enc_octet_len); + if (status) + return srtp_err_status_cipher_fail; + } + + /* initialize auth func context */ + status = srtp_auth_start(session_keys->rtcp_auth); + if (status) + return status; + + /* + * run auth func over packet (including trailer), and write the + * result at auth_tag + */ + status = + srtp_auth_compute(session_keys->rtcp_auth, (uint8_t *)auth_start, + (*pkt_octet_len) + sizeof(srtcp_trailer_t), auth_tag); + debug_print(mod_srtp, "srtcp auth tag: %s", + srtp_octet_string_hex_string(auth_tag, tag_len)); + if (status) + return srtp_err_status_auth_fail; + + /* increase the packet length by the length of the auth tag and seq_num*/ + *pkt_octet_len += (tag_len + sizeof(srtcp_trailer_t)); + + /* increase the packet by the mki_size */ + *pkt_octet_len += mki_size; + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_unprotect_rtcp(srtp_t ctx, + void *srtcp_hdr, + int *pkt_octet_len) +{ + return srtp_unprotect_rtcp_mki(ctx, srtcp_hdr, pkt_octet_len, 0); +} + +srtp_err_status_t srtp_unprotect_rtcp_mki(srtp_t ctx, + void *srtcp_hdr, + int *pkt_octet_len, + unsigned int use_mki) +{ + srtcp_hdr_t *hdr = (srtcp_hdr_t *)srtcp_hdr; + uint32_t *enc_start; /* pointer to start of encrypted portion */ + uint32_t *auth_start; /* pointer to start of auth. portion */ + uint32_t *trailer_p; /* pointer to start of trailer */ + uint32_t trailer; /* trailer value */ + unsigned int enc_octet_len = 0; /* number of octets in encrypted portion */ + uint8_t *auth_tag = NULL; /* location of auth_tag within packet */ + uint8_t tmp_tag[SRTP_MAX_TAG_LEN]; + srtp_err_status_t status; + unsigned int auth_len; + int tag_len; + srtp_stream_ctx_t *stream; + uint32_t prefix_len; + uint32_t seq_num; + int e_bit_in_packet; /* whether the E-bit was found in the packet */ + int sec_serv_confidentiality; /* whether confidentiality was requested */ + unsigned int mki_size = 0; + srtp_session_keys_t *session_keys = NULL; + + /* we assume the hdr is 32-bit aligned to start */ + + if (*pkt_octet_len < 0) + return srtp_err_status_bad_param; + + /* + * check that the length value is sane; we'll check again once we + * know the tag length, but we at least want to know that it is + * a positive value + */ + if ((unsigned int)(*pkt_octet_len) < + octets_in_rtcp_header + sizeof(srtcp_trailer_t)) + return srtp_err_status_bad_param; + + /* + * look up ssrc in srtp_stream list, and process the packet with + * the appropriate stream. if we haven't seen this stream before, + * there's only one key for this srtp_session, and the cipher + * supports key-sharing, then we assume that a new stream using + * that key has just started up + */ + stream = srtp_get_stream(ctx, hdr->ssrc); + if (stream == NULL) { + if (ctx->stream_template != NULL) { + stream = ctx->stream_template; + + debug_print(mod_srtp, + "srtcp using provisional stream (SSRC: 0x%08x)", + ntohl(hdr->ssrc)); + } else { + /* no template stream, so we return an error */ + return srtp_err_status_no_ctx; + } + } + + /* + * Determine if MKI is being used and what session keys should be used + */ + if (use_mki) { + session_keys = srtp_get_session_keys( + stream, (uint8_t *)hdr, (const unsigned int *)pkt_octet_len, + &mki_size); + + if (session_keys == NULL) + return srtp_err_status_bad_mki; + } else { + session_keys = &stream->session_keys[0]; + } + + /* get tag length from stream context */ + tag_len = srtp_auth_get_tag_length(session_keys->rtcp_auth); + + /* check the packet length - it must contain at least a full RTCP + header, an auth tag (if applicable), and the SRTCP encrypted flag + and 31-bit index value */ + if (*pkt_octet_len < (int)(octets_in_rtcp_header + tag_len + mki_size + + sizeof(srtcp_trailer_t))) { + return srtp_err_status_bad_param; + } + + /* + * Check if this is an AEAD stream (GCM mode). If so, then dispatch + * the request to our AEAD handler. + */ + if (session_keys->rtp_cipher->algorithm == SRTP_AES_GCM_128 || + session_keys->rtp_cipher->algorithm == SRTP_AES_GCM_256) { + return srtp_unprotect_rtcp_aead(ctx, stream, srtcp_hdr, + (unsigned int *)pkt_octet_len, + session_keys, mki_size); + } + + sec_serv_confidentiality = stream->rtcp_services == sec_serv_conf || + stream->rtcp_services == sec_serv_conf_and_auth; + + /* + * set encryption start, encryption length, and trailer + */ + enc_octet_len = *pkt_octet_len - (octets_in_rtcp_header + tag_len + + mki_size + sizeof(srtcp_trailer_t)); + /* + *index & E (encryption) bit follow normal data. hdr->len is the number of + * words (32-bit) in the normal packet minus 1 + */ + /* This should point trailer to the word past the end of the normal data. */ + /* This would need to be modified for optional mikey data */ + trailer_p = (uint32_t *)((char *)hdr + *pkt_octet_len - + (tag_len + mki_size + sizeof(srtcp_trailer_t))); + memcpy(&trailer, trailer_p, sizeof(trailer)); + + e_bit_in_packet = + (*((unsigned char *)trailer_p) & SRTCP_E_BYTE_BIT) == SRTCP_E_BYTE_BIT; + if (e_bit_in_packet != sec_serv_confidentiality) { + return srtp_err_status_cant_check; + } + if (sec_serv_confidentiality) { + enc_start = (uint32_t *)hdr + uint32s_in_rtcp_header; + } else { + enc_octet_len = 0; + enc_start = NULL; /* this indicates that there's no encryption */ + } + + /* + * set the auth_start and auth_tag pointers to the proper locations + * (note that srtcp *always* uses authentication, unlike srtp) + */ + auth_start = (uint32_t *)hdr; + + /* + * The location of the auth tag in the packet needs to know MKI + * could be present. The data needed to calculate the Auth tag + * must not include the MKI + */ + auth_len = *pkt_octet_len - tag_len - mki_size; + auth_tag = (uint8_t *)hdr + auth_len + mki_size; + + /* + * check the sequence number for replays + */ + /* this is easier than dealing with bitfield access */ + seq_num = ntohl(trailer) & SRTCP_INDEX_MASK; + debug_print(mod_srtp, "srtcp index: %x", seq_num); + status = srtp_rdb_check(&stream->rtcp_rdb, seq_num); + if (status) + return status; + + /* + * if we're using aes counter mode, set nonce and seq + */ + if (session_keys->rtcp_cipher->type->id == SRTP_AES_ICM_128 || + session_keys->rtcp_cipher->type->id == SRTP_AES_ICM_192 || + session_keys->rtcp_cipher->type->id == SRTP_AES_ICM_256) { + v128_t iv; + + iv.v32[0] = 0; + iv.v32[1] = hdr->ssrc; /* still in network order! */ + iv.v32[2] = htonl(seq_num >> 16); + iv.v32[3] = htonl(seq_num << 16); + status = srtp_cipher_set_iv(session_keys->rtcp_cipher, (uint8_t *)&iv, + srtp_direction_decrypt); + + } else { + v128_t iv; + + /* otherwise, just set the index to seq_num */ + iv.v32[0] = 0; + iv.v32[1] = 0; + iv.v32[2] = 0; + iv.v32[3] = htonl(seq_num); + status = srtp_cipher_set_iv(session_keys->rtcp_cipher, (uint8_t *)&iv, + srtp_direction_decrypt); + } + if (status) + return srtp_err_status_cipher_fail; + + /* initialize auth func context */ + status = srtp_auth_start(session_keys->rtcp_auth); + if (status) + return status; + + /* run auth func over packet, put result into tmp_tag */ + status = srtp_auth_compute(session_keys->rtcp_auth, (uint8_t *)auth_start, + auth_len, tmp_tag); + debug_print(mod_srtp, "srtcp computed tag: %s", + srtp_octet_string_hex_string(tmp_tag, tag_len)); + if (status) + return srtp_err_status_auth_fail; + + /* compare the tag just computed with the one in the packet */ + debug_print(mod_srtp, "srtcp tag from packet: %s", + srtp_octet_string_hex_string(auth_tag, tag_len)); + if (srtp_octet_string_is_eq(tmp_tag, auth_tag, tag_len)) + return srtp_err_status_auth_fail; + + /* + * if we're authenticating using a universal hash, put the keystream + * prefix into the authentication tag + */ + prefix_len = srtp_auth_get_prefix_length(session_keys->rtcp_auth); + if (prefix_len) { + status = srtp_cipher_output(session_keys->rtcp_cipher, auth_tag, + &prefix_len); + debug_print(mod_srtp, "keystream prefix: %s", + srtp_octet_string_hex_string(auth_tag, prefix_len)); + if (status) + return srtp_err_status_cipher_fail; + } + + /* if we're decrypting, exor keystream into the message */ + if (enc_start) { + status = srtp_cipher_decrypt(session_keys->rtcp_cipher, + (uint8_t *)enc_start, &enc_octet_len); + if (status) + return srtp_err_status_cipher_fail; + } + + /* decrease the packet length by the length of the auth tag and seq_num */ + *pkt_octet_len -= (tag_len + sizeof(srtcp_trailer_t)); + + /* decrease the packet length by the length of the mki_size */ + *pkt_octet_len -= mki_size; + + /* + * verify that stream is for received traffic - this check will + * detect SSRC collisions, since a stream that appears in both + * srtp_protect() and srtp_unprotect() will fail this test in one of + * those functions. + * + * we do this check *after* the authentication check, so that the + * latter check will catch any attempts to fool us into thinking + * that we've got a collision + */ + if (stream->direction != dir_srtp_receiver) { + if (stream->direction == dir_unknown) { + stream->direction = dir_srtp_receiver; + } else { + srtp_handle_event(ctx, stream, event_ssrc_collision); + } + } + + /* + * if the stream is a 'provisional' one, in which the template context + * is used, then we need to allocate a new stream at this point, since + * the authentication passed + */ + if (stream == ctx->stream_template) { + srtp_stream_ctx_t *new_stream; + + /* + * allocate and initialize a new stream + * + * note that we indicate failure if we can't allocate the new + * stream, and some implementations will want to not return + * failure here + */ + status = + srtp_stream_clone(ctx->stream_template, hdr->ssrc, &new_stream); + if (status) + return status; + + /* add new stream to the head of the stream_list */ + new_stream->next = ctx->stream_list; + ctx->stream_list = new_stream; + + /* set stream (the pointer used in this function) */ + stream = new_stream; + } + + /* we've passed the authentication check, so add seq_num to the rdb */ + srtp_rdb_add_index(&stream->rtcp_rdb, seq_num); + + return srtp_err_status_ok; +} + +/* + * user data within srtp_t context + */ + +void srtp_set_user_data(srtp_t ctx, void *data) +{ + ctx->user_data = data; +} + +void *srtp_get_user_data(srtp_t ctx) +{ + return ctx->user_data; +} + +srtp_err_status_t srtp_crypto_policy_set_from_profile_for_rtp( + srtp_crypto_policy_t *policy, + srtp_profile_t profile) +{ + /* set SRTP policy from the SRTP profile in the key set */ + switch (profile) { + case srtp_profile_aes128_cm_sha1_80: + srtp_crypto_policy_set_aes_cm_128_hmac_sha1_80(policy); + break; + case srtp_profile_aes128_cm_sha1_32: + srtp_crypto_policy_set_aes_cm_128_hmac_sha1_32(policy); + break; + case srtp_profile_null_sha1_80: + srtp_crypto_policy_set_null_cipher_hmac_sha1_80(policy); + break; +#ifdef GCM + case srtp_profile_aead_aes_128_gcm: + srtp_crypto_policy_set_aes_gcm_128_16_auth(policy); + break; + case srtp_profile_aead_aes_256_gcm: + srtp_crypto_policy_set_aes_gcm_256_16_auth(policy); + break; +#endif + /* the following profiles are not (yet) supported */ + case srtp_profile_null_sha1_32: + default: + return srtp_err_status_bad_param; + } + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_crypto_policy_set_from_profile_for_rtcp( + srtp_crypto_policy_t *policy, + srtp_profile_t profile) +{ + /* set SRTP policy from the SRTP profile in the key set */ + switch (profile) { + case srtp_profile_aes128_cm_sha1_80: + srtp_crypto_policy_set_aes_cm_128_hmac_sha1_80(policy); + break; + case srtp_profile_aes128_cm_sha1_32: + /* We do not honor the 32-bit auth tag request since + * this is not compliant with RFC 3711 */ + srtp_crypto_policy_set_aes_cm_128_hmac_sha1_80(policy); + break; + case srtp_profile_null_sha1_80: + srtp_crypto_policy_set_null_cipher_hmac_sha1_80(policy); + break; +#ifdef GCM + case srtp_profile_aead_aes_128_gcm: + srtp_crypto_policy_set_aes_gcm_128_16_auth(policy); + break; + case srtp_profile_aead_aes_256_gcm: + srtp_crypto_policy_set_aes_gcm_256_16_auth(policy); + break; +#endif + /* the following profiles are not (yet) supported */ + case srtp_profile_null_sha1_32: + default: + return srtp_err_status_bad_param; + } + + return srtp_err_status_ok; +} + +void srtp_append_salt_to_key(uint8_t *key, + unsigned int bytes_in_key, + uint8_t *salt, + unsigned int bytes_in_salt) +{ + memcpy(key + bytes_in_key, salt, bytes_in_salt); +} + +unsigned int srtp_profile_get_master_key_length(srtp_profile_t profile) +{ + switch (profile) { + case srtp_profile_aes128_cm_sha1_80: + return SRTP_AES_128_KEY_LEN; + break; + case srtp_profile_aes128_cm_sha1_32: + return SRTP_AES_128_KEY_LEN; + break; + case srtp_profile_null_sha1_80: + return SRTP_AES_128_KEY_LEN; + break; + case srtp_profile_aead_aes_128_gcm: + return SRTP_AES_128_KEY_LEN; + break; + case srtp_profile_aead_aes_256_gcm: + return SRTP_AES_256_KEY_LEN; + break; + /* the following profiles are not (yet) supported */ + case srtp_profile_null_sha1_32: + default: + return 0; /* indicate error by returning a zero */ + } +} + +unsigned int srtp_profile_get_master_salt_length(srtp_profile_t profile) +{ + switch (profile) { + case srtp_profile_aes128_cm_sha1_80: + return SRTP_SALT_LEN; + break; + case srtp_profile_aes128_cm_sha1_32: + return SRTP_SALT_LEN; + break; + case srtp_profile_null_sha1_80: + return SRTP_SALT_LEN; + break; + case srtp_profile_aead_aes_128_gcm: + return SRTP_AEAD_SALT_LEN; + break; + case srtp_profile_aead_aes_256_gcm: + return SRTP_AEAD_SALT_LEN; + break; + /* the following profiles are not (yet) supported */ + case srtp_profile_null_sha1_32: + default: + return 0; /* indicate error by returning a zero */ + } +} + +srtp_err_status_t stream_get_protect_trailer_length(srtp_stream_ctx_t *stream, + uint32_t is_rtp, + uint32_t use_mki, + uint32_t mki_index, + uint32_t *length) +{ + srtp_session_keys_t *session_key; + + *length = 0; + + if (use_mki) { + if (mki_index >= stream->num_master_keys) { + return srtp_err_status_bad_mki; + } + session_key = &stream->session_keys[mki_index]; + + *length += session_key->mki_size; + + } else { + session_key = &stream->session_keys[0]; + } + if (is_rtp) { + *length += srtp_auth_get_tag_length(session_key->rtp_auth); + } else { + *length += srtp_auth_get_tag_length(session_key->rtcp_auth); + *length += sizeof(srtcp_trailer_t); + } + + return srtp_err_status_ok; +} + +srtp_err_status_t get_protect_trailer_length(srtp_t session, + uint32_t is_rtp, + uint32_t use_mki, + uint32_t mki_index, + uint32_t *length) +{ + srtp_stream_ctx_t *stream; + + if (session == NULL) { + return srtp_err_status_bad_param; + } + + if (session->stream_template == NULL && session->stream_list == NULL) { + return srtp_err_status_bad_param; + } + + *length = 0; + + stream = session->stream_template; + + if (stream != NULL) { + stream_get_protect_trailer_length(stream, is_rtp, use_mki, mki_index, + length); + } + + stream = session->stream_list; + + while (stream != NULL) { + uint32_t temp_length; + if (stream_get_protect_trailer_length(stream, is_rtp, use_mki, + mki_index, &temp_length) == + srtp_err_status_ok) { + if (temp_length > *length) { + *length = temp_length; + } + } + stream = stream->next; + } + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_get_protect_trailer_length(srtp_t session, + uint32_t use_mki, + uint32_t mki_index, + uint32_t *length) +{ + return get_protect_trailer_length(session, 1, use_mki, mki_index, length); +} + +srtp_err_status_t srtp_get_protect_rtcp_trailer_length(srtp_t session, + uint32_t use_mki, + uint32_t mki_index, + uint32_t *length) +{ + return get_protect_trailer_length(session, 0, use_mki, mki_index, length); +} + +/* + * SRTP debug interface + */ +srtp_err_status_t srtp_set_debug_module(const char *mod_name, int v) +{ + return srtp_crypto_kernel_set_debug_module(mod_name, v); +} + +srtp_err_status_t srtp_list_debug_modules(void) +{ + return srtp_crypto_kernel_list_debug_modules(); +} + +/* + * srtp_log_handler is a global variable holding a pointer to the + * log handler function; this function is called for any log + * output. + */ + +static srtp_log_handler_func_t *srtp_log_handler = NULL; +static void *srtp_log_handler_data = NULL; + +void srtp_err_handler(srtp_err_reporting_level_t level, const char *msg) +{ + if (srtp_log_handler) { + srtp_log_level_t log_level = srtp_log_level_error; + switch (level) { + case srtp_err_level_error: + log_level = srtp_log_level_error; + break; + case srtp_err_level_warning: + log_level = srtp_log_level_warning; + break; + case srtp_err_level_info: + log_level = srtp_log_level_info; + break; + case srtp_err_level_debug: + log_level = srtp_log_level_debug; + break; + } + + srtp_log_handler(log_level, msg, srtp_log_handler_data); + } +} + +srtp_err_status_t srtp_install_log_handler(srtp_log_handler_func_t func, + void *data) +{ + /* + * note that we accept NULL arguments intentionally - calling this + * function with a NULL arguments removes a log handler that's + * been previously installed + */ + + if (srtp_log_handler) { + srtp_install_err_report_handler(NULL); + } + srtp_log_handler = func; + srtp_log_handler_data = data; + if (srtp_log_handler) { + srtp_install_err_report_handler(srtp_err_handler); + } + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_set_stream_roc(srtp_t session, + uint32_t ssrc, + uint32_t roc) +{ + srtp_stream_t stream; + + stream = srtp_get_stream(session, htonl(ssrc)); + if (stream == NULL) + return srtp_err_status_bad_param; + + stream->pending_roc = roc; + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_get_stream_roc(srtp_t session, + uint32_t ssrc, + uint32_t *roc) +{ + srtp_stream_t stream; + + stream = srtp_get_stream(session, htonl(ssrc)); + if (stream == NULL) + return srtp_err_status_bad_param; + + *roc = srtp_rdbx_get_roc(&stream->rtp_rdbx); + + return srtp_err_status_ok; +} diff --git a/third_party/libsrtp/src/test/cutest.h b/third_party/libsrtp/src/test/cutest.h new file mode 100644 index 0000000000..f46626d395 --- /dev/null +++ b/third_party/libsrtp/src/test/cutest.h @@ -0,0 +1,713 @@ +/* + * CUTest -- C/C++ Unit Test facility + * <http://github.com/mity/cutest> + * + * Copyright (c) 2013-2017 Martin Mitas + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#ifndef CUTEST_H__ +#define CUTEST_H__ + +/************************ + *** Public interface *** + ************************/ + +/* By default, <cutest.h> provides the main program entry point (function + * main()). However, if the test suite is composed of multiple source files + * which include <cutest.h>, then this causes a problem of multiple main() + * definitions. To avoid this problem, #define macro TEST_NO_MAIN in all + * compilation units but one. + */ + +/* Macro to specify list of unit tests in the suite. + * The unit test implementation MUST provide list of unit tests it implements + * with this macro: + * + * TEST_LIST = { + * { "test1_name", test1_func_ptr }, + * { "test2_name", test2_func_ptr }, + * ... + * { 0 } + * }; + * + * The list specifies names of each test (must be unique) and pointer to + * a function implementing it. The function does not take any arguments + * and has no return values, i.e. every test function has tp be compatible + * with this prototype: + * + * void test_func(void); + */ +#define TEST_LIST const struct test__ test_list__[] + +/* Macros for testing whether an unit test succeeds or fails. These macros + * can be used arbitrarily in functions implementing the unit tests. + * + * If any condition fails throughout execution of a test, the test fails. + * + * TEST_CHECK takes only one argument (the condition), TEST_CHECK_ allows + * also to specify an error message to print out if the condition fails. + * (It expects printf-like format string and its parameters). The macros + * return non-zero (condition passes) or 0 (condition fails). + * + * That can be useful when more conditions should be checked only if some + * preceding condition passes, as illustrated in this code snippet: + * + * SomeStruct* ptr = allocate_some_struct(); + * if(TEST_CHECK(ptr != NULL)) { + * TEST_CHECK(ptr->member1 < 100); + * TEST_CHECK(ptr->member2 > 200); + * } + */ +#define TEST_CHECK_(cond, ...) \ + test_check__((cond), __FILE__, __LINE__, __VA_ARGS__) +#define TEST_CHECK(cond) test_check__((cond), __FILE__, __LINE__, "%s", #cond) + +/********************** + *** Implementation *** + **********************/ + +/* The unit test files should not rely on anything below. */ + +#include <stdarg.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#if defined(unix) || defined(__unix__) || defined(__unix) || defined(__APPLE__) +#define CUTEST_UNIX__ 1 +#include <errno.h> +#include <unistd.h> +#include <sys/types.h> +#include <sys/wait.h> +#include <signal.h> +#endif + +#if defined(_WIN32) || defined(__WIN32__) || defined(__WINDOWS__) +#define CUTEST_WIN__ 1 +#include <windows.h> +#include <io.h> +#endif + +#ifdef __cplusplus +#include <exception> +#endif + +/* Note our global private identifiers end with '__' to mitigate risk of clash + * with the unit tests implementation. */ + +#ifdef __cplusplus +extern "C" { +#endif + +struct test__ { + const char *name; + void (*func)(void); +}; + +extern const struct test__ test_list__[]; + +int test_check__(int cond, const char *file, int line, const char *fmt, ...); + +#ifndef TEST_NO_MAIN + +static char *test_argv0__ = NULL; +static int test_count__ = 0; +static int test_no_exec__ = 0; +static int test_no_summary__ = 0; +static int test_skip_mode__ = 0; + +static int test_stat_failed_units__ = 0; +static int test_stat_run_units__ = 0; + +static const struct test__ *test_current_unit__ = NULL; +static int test_current_already_logged__ = 0; +static int test_verbose_level__ = 2; +static int test_current_failures__ = 0; +static int test_colorize__ = 0; + +#define CUTEST_COLOR_DEFAULT__ 0 +#define CUTEST_COLOR_GREEN__ 1 +#define CUTEST_COLOR_RED__ 2 +#define CUTEST_COLOR_DEFAULT_INTENSIVE__ 3 +#define CUTEST_COLOR_GREEN_INTENSIVE__ 4 +#define CUTEST_COLOR_RED_INTENSIVE__ 5 + +static size_t test_print_in_color__(int color, const char *fmt, ...) +{ + va_list args; + char buffer[256]; + size_t n; + + va_start(args, fmt); + vsnprintf(buffer, sizeof(buffer), fmt, args); + va_end(args); + buffer[sizeof(buffer) - 1] = '\0'; + + if (!test_colorize__) { + return printf("%s", buffer); + } + +#if defined CUTEST_UNIX__ + { + const char *col_str; + switch (color) { + case CUTEST_COLOR_GREEN__: + col_str = "\033[0;32m"; + break; + case CUTEST_COLOR_RED__: + col_str = "\033[0;31m"; + break; + case CUTEST_COLOR_GREEN_INTENSIVE__: + col_str = "\033[1;32m"; + break; + case CUTEST_COLOR_RED_INTENSIVE__: + col_str = "\033[1;30m"; + break; + case CUTEST_COLOR_DEFAULT_INTENSIVE__: + col_str = "\033[1m"; + break; + default: + col_str = "\033[0m"; + break; + } + printf("%s", col_str); + n = printf("%s", buffer); + printf("\033[0m"); + return n; + } +#elif defined CUTEST_WIN__ + { + HANDLE h; + CONSOLE_SCREEN_BUFFER_INFO info; + WORD attr; + + h = GetStdHandle(STD_OUTPUT_HANDLE); + GetConsoleScreenBufferInfo(h, &info); + + switch (color) { + case CUTEST_COLOR_GREEN__: + attr = FOREGROUND_GREEN; + break; + case CUTEST_COLOR_RED__: + attr = FOREGROUND_RED; + break; + case CUTEST_COLOR_GREEN_INTENSIVE__: + attr = FOREGROUND_GREEN | FOREGROUND_INTENSITY; + break; + case CUTEST_COLOR_RED_INTENSIVE__: + attr = FOREGROUND_RED | FOREGROUND_INTENSITY; + break; + case CUTEST_COLOR_DEFAULT_INTENSIVE__: + attr = FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_RED | + FOREGROUND_INTENSITY; + break; + default: + attr = 0; + break; + } + if (attr != 0) + SetConsoleTextAttribute(h, attr); + n = printf("%s", buffer); + SetConsoleTextAttribute(h, info.wAttributes); + return n; + } +#else + n = printf("%s", buffer); + return n; +#endif +} + +int test_check__(int cond, const char *file, int line, const char *fmt, ...) +{ + const char *result_str; + int result_color; + int verbose_level; + + if (cond) { + result_str = "ok"; + result_color = CUTEST_COLOR_GREEN__; + verbose_level = 3; + } else { + if (!test_current_already_logged__ && test_current_unit__ != NULL) { + printf("[ "); + test_print_in_color__(CUTEST_COLOR_RED_INTENSIVE__, "FAILED"); + printf(" ]\n"); + } + result_str = "failed"; + result_color = CUTEST_COLOR_RED__; + verbose_level = 2; + test_current_failures__++; + test_current_already_logged__++; + } + + if (test_verbose_level__ >= verbose_level) { + size_t n = 0; + va_list args; + + printf(" "); + + if (file != NULL) + n += printf("%s:%d: Check ", file, line); + + va_start(args, fmt); + n += vprintf(fmt, args); + va_end(args); + + printf("... "); + test_print_in_color__(result_color, result_str); + printf("\n"); + test_current_already_logged__++; + } + + return (cond != 0); +} + +static void test_list_names__(void) +{ + const struct test__ *test; + + printf("Unit tests:\n"); + for (test = &test_list__[0]; test->func != NULL; test++) + printf(" %s\n", test->name); +} + +static const struct test__ *test_by_name__(const char *name) +{ + const struct test__ *test; + + for (test = &test_list__[0]; test->func != NULL; test++) { + if (strcmp(test->name, name) == 0) + return test; + } + + return NULL; +} + +/* Call directly the given test unit function. */ +static int test_do_run__(const struct test__ *test) +{ + test_current_unit__ = test; + test_current_failures__ = 0; + test_current_already_logged__ = 0; + + if (test_verbose_level__ >= 3) { + test_print_in_color__(CUTEST_COLOR_DEFAULT_INTENSIVE__, "Test %s:\n", + test->name); + test_current_already_logged__++; + } else if (test_verbose_level__ >= 1) { + size_t n; + char spaces[32]; + + n = test_print_in_color__(CUTEST_COLOR_DEFAULT_INTENSIVE__, + "Test %s... ", test->name); + memset(spaces, ' ', sizeof(spaces)); + if (n < sizeof(spaces)) + printf("%.*s", (int)(sizeof(spaces) - n), spaces); + } else { + test_current_already_logged__ = 1; + } + +#ifdef __cplusplus + try { +#endif + + /* This is good to do for case the test unit e.g. crashes. */ + fflush(stdout); + fflush(stderr); + + test->func(); + +#ifdef __cplusplus + } catch (std::exception &e) { + const char *what = e.what(); + if (what != NULL) + test_check__(0, NULL, 0, "Threw std::exception: %s", what); + else + test_check__(0, NULL, 0, "Threw std::exception"); + } catch (...) { + test_check__(0, NULL, 0, "Threw an exception"); + } +#endif + + if (test_verbose_level__ >= 3) { + switch (test_current_failures__) { + case 0: + test_print_in_color__(CUTEST_COLOR_GREEN_INTENSIVE__, + " All conditions have passed.\n\n"); + break; + case 1: + test_print_in_color__(CUTEST_COLOR_RED_INTENSIVE__, + " One condition has FAILED.\n\n"); + break; + default: + test_print_in_color__(CUTEST_COLOR_RED_INTENSIVE__, + " %d conditions have FAILED.\n\n", + test_current_failures__); + break; + } + } else if (test_verbose_level__ >= 1 && test_current_failures__ == 0) { + printf("[ "); + test_print_in_color__(CUTEST_COLOR_GREEN_INTENSIVE__, "OK"); + printf(" ]\n"); + } + + test_current_unit__ = NULL; + return (test_current_failures__ == 0) ? 0 : -1; +} + +#if defined(CUTEST_UNIX__) || defined(CUTEST_WIN__) +/* Called if anything goes bad in cutest, or if the unit test ends in other + * way then by normal returning from its function (e.g. exception or some + * abnormal child process termination). */ +static void test_error__(const char *fmt, ...) +{ + va_list args; + + if (test_verbose_level__ == 0) + return; + + if (test_verbose_level__ <= 2 && !test_current_already_logged__ && + test_current_unit__ != NULL) { + printf("[ "); + test_print_in_color__(CUTEST_COLOR_RED_INTENSIVE__, "FAILED"); + printf(" ]\n"); + } + + if (test_verbose_level__ >= 2) { + test_print_in_color__(CUTEST_COLOR_RED_INTENSIVE__, " Error: "); + va_start(args, fmt); + vprintf(fmt, args); + va_end(args); + printf("\n"); + } +} +#endif + +/* Trigger the unit test. If possible (and not suppressed) it starts a child + * process who calls test_do_run__(), otherwise it calls test_do_run__() + * directly. */ +static void test_run__(const struct test__ *test) +{ + int failed = 1; + + test_current_unit__ = test; + test_current_already_logged__ = 0; + + if (!test_no_exec__) { +#if defined(CUTEST_UNIX__) + + pid_t pid; + int exit_code; + + pid = fork(); + if (pid == (pid_t)-1) { + test_error__("Cannot fork. %s [%d]", strerror(errno), errno); + failed = 1; + } else if (pid == 0) { + /* Child: Do the test. */ + failed = (test_do_run__(test) != 0); + exit(failed ? 1 : 0); + } else { + /* Parent: Wait until child terminates and analyze its exit code. */ + waitpid(pid, &exit_code, 0); + if (WIFEXITED(exit_code)) { + switch (WEXITSTATUS(exit_code)) { + case 0: + failed = 0; + break; /* test has passed. */ + case 1: /* noop */ + break; /* "normal" failure. */ + default: + test_error__("Unexpected exit code [%d]", + WEXITSTATUS(exit_code)); + } + } else if (WIFSIGNALED(exit_code)) { + char tmp[32]; + const char *signame; + switch (WTERMSIG(exit_code)) { + case SIGINT: + signame = "SIGINT"; + break; + case SIGHUP: + signame = "SIGHUP"; + break; + case SIGQUIT: + signame = "SIGQUIT"; + break; + case SIGABRT: + signame = "SIGABRT"; + break; + case SIGKILL: + signame = "SIGKILL"; + break; + case SIGSEGV: + signame = "SIGSEGV"; + break; + case SIGILL: + signame = "SIGILL"; + break; + case SIGTERM: + signame = "SIGTERM"; + break; + default: + sprintf(tmp, "signal %d", WTERMSIG(exit_code)); + signame = tmp; + break; + } + test_error__("Test interrupted by %s", signame); + } else { + test_error__("Test ended in an unexpected way [%d]", exit_code); + } + } + +#elif defined(CUTEST_WIN__) + + char buffer[512] = { 0 }; + STARTUPINFOA startupInfo = { 0 }; + PROCESS_INFORMATION processInfo; + DWORD exitCode; + + /* Windows has no fork(). So we propagate all info into the child + * through a command line arguments. */ + _snprintf(buffer, sizeof(buffer) - 1, + "%s --no-exec --no-summary --verbose=%d --color=%s -- \"%s\"", + test_argv0__, test_verbose_level__, + test_colorize__ ? "always" : "never", test->name); + startupInfo.cb = sizeof(STARTUPINFO); + if (CreateProcessA(NULL, buffer, NULL, NULL, FALSE, 0, NULL, NULL, + &startupInfo, &processInfo)) { + WaitForSingleObject(processInfo.hProcess, INFINITE); + GetExitCodeProcess(processInfo.hProcess, &exitCode); + CloseHandle(processInfo.hThread); + CloseHandle(processInfo.hProcess); + failed = (exitCode != 0); + } else { + test_error__("Cannot create unit test subprocess [%ld].", + GetLastError()); + failed = 1; + } + +#else + + /* A platform where we don't know how to run child process. */ + failed = (test_do_run__(test) != 0); + +#endif + + } else { + /* Child processes suppressed through --no-exec. */ + failed = (test_do_run__(test) != 0); + } + + test_current_unit__ = NULL; + + test_stat_run_units__++; + if (failed) + test_stat_failed_units__++; +} + +#if defined(CUTEST_WIN__) +/* Callback for SEH events. */ +static LONG CALLBACK test_exception_filter__(EXCEPTION_POINTERS *ptrs) +{ + test_error__("Unhandled SEH exception %08lx at %p.", + ptrs->ExceptionRecord->ExceptionCode, + ptrs->ExceptionRecord->ExceptionAddress); + fflush(stdout); + fflush(stderr); + return EXCEPTION_EXECUTE_HANDLER; +} +#endif + +static void test_help__(void) +{ + printf("Usage: %s [options] [test...]\n", test_argv0__); + printf("Run the specified unit tests; or if the option '--skip' is used, " + "run all\n"); + printf("tests in the suite but those listed. By default, if no tests are " + "specified\n"); + printf("on the command line, all unit tests in the suite are run.\n"); + printf("\n"); + printf("Options:\n"); + printf( + " -s, --skip Execute all unit tests but the listed ones\n"); + printf(" --no-exec Do not execute unit tests as child " + "processes\n"); + printf( + " --no-summary Suppress printing of test results summary\n"); + printf(" -l, --list List unit tests in the suite and exit\n"); + printf(" -v, --verbose Enable more verbose output\n"); + printf(" --verbose=LEVEL Set verbose level to LEVEL:\n"); + printf(" 0 ... Be silent\n"); + printf(" 1 ... Output one line per test (and " + "summary)\n"); + printf(" 2 ... As 1 and failed conditions (this " + "is default)\n"); + printf(" 3 ... As 1 and all conditions (and " + "extended summary)\n"); + printf(" --color=WHEN Enable colorized output (WHEN is one of " + "'auto', 'always', 'never')\n"); + printf(" -h, --help Display this help and exit\n"); + printf("\n"); + test_list_names__(); +} + +int main(int argc, char **argv) +{ + const struct test__ **tests = NULL; + int i, j, n = 0; + int seen_double_dash = 0; + + test_argv0__ = argv[0]; + +#if defined CUTEST_UNIX__ + test_colorize__ = isatty(STDOUT_FILENO); +#elif defined CUTEST_WIN__ + test_colorize__ = _isatty(_fileno(stdout)); +#else + test_colorize__ = 0; +#endif + + /* Parse options */ + for (i = 1; i < argc; i++) { + if (seen_double_dash || argv[i][0] != '-') { + tests = (const struct test__ **)realloc( + (void *)tests, (n + 1) * sizeof(const struct test__ *)); + if (tests == NULL) { + fprintf(stderr, "Out of memory.\n"); + exit(2); + } + tests[n] = test_by_name__(argv[i]); + if (tests[n] == NULL) { + fprintf(stderr, "%s: Unrecognized unit test '%s'\n", argv[0], + argv[i]); + fprintf(stderr, "Try '%s --list' for list of unit tests.\n", + argv[0]); + exit(2); + } + n++; + } else if (strcmp(argv[i], "--") == 0) { + seen_double_dash = 1; + } else if (strcmp(argv[i], "--help") == 0 || + strcmp(argv[i], "-h") == 0) { + test_help__(); + exit(0); + } else if (strcmp(argv[i], "--verbose") == 0 || + strcmp(argv[i], "-v") == 0) { + test_verbose_level__++; + } else if (strncmp(argv[i], "--verbose=", 10) == 0) { + test_verbose_level__ = atoi(argv[i] + 10); + } else if (strcmp(argv[i], "--color=auto") == 0) { + /* noop (set from above) */ + } else if (strcmp(argv[i], "--color=always") == 0 || + strcmp(argv[i], "--color") == 0) { + test_colorize__ = 1; + } else if (strcmp(argv[i], "--color=never") == 0) { + test_colorize__ = 0; + } else if (strcmp(argv[i], "--skip") == 0 || + strcmp(argv[i], "-s") == 0) { + test_skip_mode__ = 1; + } else if (strcmp(argv[i], "--no-exec") == 0) { + test_no_exec__ = 1; + } else if (strcmp(argv[i], "--no-summary") == 0) { + test_no_summary__ = 1; + } else if (strcmp(argv[i], "--list") == 0 || + strcmp(argv[i], "-l") == 0) { + test_list_names__(); + exit(0); + } else { + fprintf(stderr, "%s: Unrecognized option '%s'\n", argv[0], argv[i]); + fprintf(stderr, "Try '%s --help' for more information.\n", argv[0]); + exit(2); + } + } + +#if defined(CUTEST_WIN__) + SetUnhandledExceptionFilter(test_exception_filter__); +#endif + + /* Count all test units */ + test_count__ = 0; + for (i = 0; test_list__[i].func != NULL; i++) + test_count__++; + + /* Run the tests */ + if (n == 0) { + /* Run all tests */ + for (i = 0; test_list__[i].func != NULL; i++) + test_run__(&test_list__[i]); + } else if (!test_skip_mode__) { + /* Run the listed tests */ + for (i = 0; i < n; i++) + test_run__(tests[i]); + } else { + /* Run all tests except those listed */ + for (i = 0; test_list__[i].func != NULL; i++) { + int want_skip = 0; + for (j = 0; j < n; j++) { + if (tests[j] == &test_list__[i]) { + want_skip = 1; + break; + } + } + if (!want_skip) + test_run__(&test_list__[i]); + } + } + + /* Write a summary */ + if (!test_no_summary__ && test_verbose_level__ >= 1) { + test_print_in_color__(CUTEST_COLOR_DEFAULT_INTENSIVE__, "\nSummary:\n"); + + if (test_verbose_level__ >= 3) { + printf(" Count of all unit tests: %4d\n", test_count__); + printf(" Count of run unit tests: %4d\n", + test_stat_run_units__); + printf(" Count of failed unit tests: %4d\n", + test_stat_failed_units__); + printf(" Count of skipped unit tests: %4d\n", + test_count__ - test_stat_run_units__); + } + + if (test_stat_failed_units__ == 0) { + test_print_in_color__(CUTEST_COLOR_GREEN_INTENSIVE__, + " SUCCESS: All unit tests have passed.\n"); + } else { + test_print_in_color__( + CUTEST_COLOR_RED_INTENSIVE__, + " FAILED: %d of %d unit tests have failed.\n", + test_stat_failed_units__, test_stat_run_units__); + } + } + + if (tests != NULL) + free((void *)tests); + + return (test_stat_failed_units__ == 0) ? 0 : 1; +} + +#endif /* #ifndef TEST_NO_MAIN */ + +#ifdef __cplusplus +} /* extern "C" */ +#endif + +#endif /* #ifndef CUTEST_H__ */ diff --git a/third_party/libsrtp/src/test/getopt_s.c b/third_party/libsrtp/src/test/getopt_s.c new file mode 100644 index 0000000000..e0bd7f77ed --- /dev/null +++ b/third_party/libsrtp/src/test/getopt_s.c @@ -0,0 +1,109 @@ +/* + * getopt.c + * + * a minimal implementation of the getopt() function, written so that + * test applications that use that function can run on non-POSIX + * platforms + * + */ +/* + * + * Copyright (c) 2001-2017 Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#include <stdlib.h> /* for NULL */ + +int optind_s = 0; + +char *optarg_s; + +#define GETOPT_FOUND_WITHOUT_ARGUMENT 2 +#define GETOPT_FOUND_WITH_ARGUMENT 1 +#define GETOPT_NOT_FOUND 0 + +static int getopt_check_character(char c, const char *string) +{ + unsigned int max_string_len = 128; + + while (*string != 0) { + if (max_string_len == 0) { + return GETOPT_NOT_FOUND; + } + max_string_len--; + if (*string++ == c) { + if (*string == ':') { + return GETOPT_FOUND_WITH_ARGUMENT; + } else { + return GETOPT_FOUND_WITHOUT_ARGUMENT; + } + } + } + return GETOPT_NOT_FOUND; +} + +int getopt_s(int argc, char *const argv[], const char *optstring) +{ + while (optind_s + 1 < argc) { + char *string; + + /* move 'string' on to next argument */ + optind_s++; + string = argv[optind_s]; + + if (string == NULL) + return '?'; /* NULL argument string */ + + if (string[0] != '-') + return -1; /* found an unexpected character */ + + switch (getopt_check_character(string[1], optstring)) { + case GETOPT_FOUND_WITH_ARGUMENT: + if (optind_s + 1 < argc) { + optind_s++; + optarg_s = argv[optind_s]; + return string[1]; + } else { + return '?'; /* argument missing */ + } + case GETOPT_FOUND_WITHOUT_ARGUMENT: + return string[1]; + case GETOPT_NOT_FOUND: + default: + return '?'; /* didn't find expected character */ + break; + } + } + + return -1; +} diff --git a/third_party/libsrtp/src/test/getopt_s.h b/third_party/libsrtp/src/test/getopt_s.h new file mode 100644 index 0000000000..53fb25ba71 --- /dev/null +++ b/third_party/libsrtp/src/test/getopt_s.h @@ -0,0 +1,67 @@ +/* + * getopt.h + * + * interface to a minimal implementation of the getopt() function, + * written so that test applications that use that function can run on + * non-POSIX platforms + * + */ +/* + * + * Copyright (c) 2001-2017 Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef GETOPT_S_H +#define GETOPT_S_H + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * getopt_s(), optarg_s, and optind_s are small, locally defined + * versions of the POSIX standard getopt() interface. + */ + +int getopt_s(int argc, char *const argv[], const char *optstring); + +extern char *optarg_s; /* defined in getopt.c */ + +extern int optind_s; /* defined in getopt.c */ + +#ifdef __cplusplus +} +#endif + +#endif /* GETOPT_S_H */ diff --git a/third_party/libsrtp/src/test/meson.build b/third_party/libsrtp/src/test/meson.build new file mode 100644 index 0000000000..4a67912ebb --- /dev/null +++ b/third_party/libsrtp/src/test/meson.build @@ -0,0 +1,77 @@ +# test suite + +# XXX: Makefile only runs test_srtp and srtp_driver with valgrind +add_test_setup('valgrind', + exe_wrapper: ['valgrind', '--leak-check=full'], + timeout_multiplier: 10) + +test_apps = [ + ['srtp_driver', {'extra_sources': 'util.c', 'run_args': '-v'}], + ['replay_driver', {'extra_sources': 'ut_sim.c', 'run_args': '-v'}], + ['roc_driver', {'extra_sources': 'ut_sim.c', 'run_args': '-v'}], + ['rdbx_driver', {'extra_sources': 'ut_sim.c', 'run_args': '-v'}], + ['test_srtp', {'run_args': '-v'}], + ['rtpw', {'extra_sources': ['rtp.c', 'util.c', '../crypto/math/datatypes.c'], 'define_test': false}], +] + +foreach t : test_apps + test_name = t.get(0) + test_dict = t.get(1, {}) + test_extra_sources = test_dict.get('extra_sources', []) + test_run_args = test_dict.get('run_args', []) + + test_exe = executable(test_name, + '@0@.c'.format(test_name), 'getopt_s.c', test_extra_sources, + include_directories: [config_incs, crypto_incs, srtp2_incs, test_incs], + dependencies: [srtp2_deps, syslibs], + link_with: libsrtp2_for_tests) + + if test_dict.get('define_test', true) + test(test_name, test_exe, args: test_run_args) + else + set_variable(test_name + '_exe', test_exe) + endif +endforeach + +# rtpw test needs to be run using shell scripts +can_run_rtpw = find_program('sh', 'bash', required: false).found() + +# Meson only passes the exe_wrapper to shell scripts starting 0.55 +if meson.is_cross_build() and meson.version().version_compare('<0.55') + can_run_rtpw = false +endif + +if can_run_rtpw + words_txt = files('words.txt') + + rtpw_test_sh = find_program('rtpw_test.sh', required: false) + if rtpw_test_sh.found() + test('rtpw_test', rtpw_test_sh, + args: ['-w', words_txt], + depends: rtpw_exe, + is_parallel: false, + workdir: meson.current_build_dir()) + endif + + rtpw_test_gcm_sh = find_program('rtpw_test_gcm.sh', required: false) + if (use_openssl or use_nss) and rtpw_test_gcm_sh.found() + test('rtpw_test_gcm', rtpw_test_gcm_sh, + args: ['-w', words_txt], + depends: rtpw_exe, + is_parallel: false, + workdir: meson.current_build_dir()) + endif +endif + +# rtp_decoder +pcap_dep = dependency('libpcap', required: get_option('pcap-tests')) + +if pcap_dep.found() + executable('rtp_decoder', + 'rtp_decoder.c', 'getopt_s.c', 'rtp.c', 'util.c', 'getopt_s.c', + '../crypto/math/datatypes.c', + include_directories: [config_incs, crypto_incs, srtp2_incs, test_incs], + dependencies: [srtp2_deps, pcap_dep, syslibs], + link_with: libsrtp2, + install: false) +endif diff --git a/third_party/libsrtp/src/test/rdbx_driver.c b/third_party/libsrtp/src/test/rdbx_driver.c new file mode 100644 index 0000000000..430e28389a --- /dev/null +++ b/third_party/libsrtp/src/test/rdbx_driver.c @@ -0,0 +1,353 @@ +/* + * rdbx_driver.c + * + * driver for the rdbx implementation (replay database with extended range) + * + * David A. McGrew + * Cisco Systems, Inc. + */ +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> /* for printf() */ +#include "getopt_s.h" /* for local getopt() */ + +#include "rdbx.h" +#include "cipher_priv.h" + +#ifdef ROC_TEST +#error "srtp_rdbx_t won't work with ROC_TEST - bitmask same size as seq_median" +#endif + +#include "ut_sim.h" + +srtp_err_status_t test_replay_dbx(int num_trials, unsigned long ws); + +double rdbx_check_adds_per_second(int num_trials, unsigned long ws); + +void usage(char *prog_name) +{ + printf("usage: %s [ -t | -v ]\n", prog_name); + exit(255); +} + +int main(int argc, char *argv[]) +{ + double rate; + srtp_err_status_t status; + int q; + unsigned do_timing_test = 0; + unsigned do_validation = 0; + + /* process input arguments */ + while (1) { + q = getopt_s(argc, argv, "tv"); + if (q == -1) + break; + switch (q) { + case 't': + do_timing_test = 1; + break; + case 'v': + do_validation = 1; + break; + default: + usage(argv[0]); + } + } + + printf("rdbx (replay database w/ extended range) test driver\n" + "David A. McGrew\n" + "Cisco Systems, Inc.\n"); + + if (!do_validation && !do_timing_test) + usage(argv[0]); + + if (do_validation) { + printf("testing srtp_rdbx_t (ws=128)...\n"); + + status = test_replay_dbx(1 << 12, 128); + if (status) { + printf("failed\n"); + exit(1); + } + printf("passed\n"); + + printf("testing srtp_rdbx_t (ws=1024)...\n"); + + status = test_replay_dbx(1 << 12, 1024); + if (status) { + printf("failed\n"); + exit(1); + } + printf("passed\n"); + } + + if (do_timing_test) { + rate = rdbx_check_adds_per_second(1 << 18, 128); + printf("rdbx_check/replay_adds per second (ws=128): %e\n", rate); + rate = rdbx_check_adds_per_second(1 << 18, 1024); + printf("rdbx_check/replay_adds per second (ws=1024): %e\n", rate); + } + + return 0; +} + +/* + * rdbx_check_add(rdbx, idx) checks a known-to-be-good idx against + * rdbx, then adds it. if a failure is detected (i.e., the check + * indicates that the value is already in rdbx) then + * srtp_err_status_algo_fail is returned. + * + */ + +srtp_err_status_t rdbx_check_add(srtp_rdbx_t *rdbx, uint32_t idx) +{ + int delta; + srtp_xtd_seq_num_t est; + + delta = srtp_index_guess(&rdbx->index, &est, idx); + + if (srtp_rdbx_check(rdbx, delta) != srtp_err_status_ok) { + printf("replay_check failed at index %u\n", idx); + return srtp_err_status_algo_fail; + } + + /* + * in practice, we'd authenticate the packet containing idx, using + * the estimated value est, at this point + */ + + if (srtp_rdbx_add_index(rdbx, delta) != srtp_err_status_ok) { + printf("rdbx_add_index failed at index %u\n", idx); + return srtp_err_status_algo_fail; + } + + return srtp_err_status_ok; +} + +/* + * rdbx_check_expect_failure(srtp_rdbx_t *rdbx, uint32_t idx) + * + * checks that a sequence number idx is in the replay database + * and thus will be rejected + */ + +srtp_err_status_t rdbx_check_expect_failure(srtp_rdbx_t *rdbx, uint32_t idx) +{ + int delta; + srtp_xtd_seq_num_t est; + srtp_err_status_t status; + + delta = srtp_index_guess(&rdbx->index, &est, idx); + + status = srtp_rdbx_check(rdbx, delta); + if (status == srtp_err_status_ok) { + printf("delta: %d ", delta); + printf("replay_check failed at index %u (false positive)\n", idx); + return srtp_err_status_algo_fail; + } + + return srtp_err_status_ok; +} + +srtp_err_status_t rdbx_check_add_unordered(srtp_rdbx_t *rdbx, uint32_t idx) +{ + int delta; + srtp_xtd_seq_num_t est; + srtp_err_status_t rstat; + + delta = srtp_index_guess(&rdbx->index, &est, idx); + + rstat = srtp_rdbx_check(rdbx, delta); + if ((rstat != srtp_err_status_ok) && + (rstat != srtp_err_status_replay_old)) { + printf("replay_check_add_unordered failed at index %u\n", idx); + return srtp_err_status_algo_fail; + } + if (rstat == srtp_err_status_replay_old) { + return srtp_err_status_ok; + } + if (srtp_rdbx_add_index(rdbx, delta) != srtp_err_status_ok) { + printf("rdbx_add_index failed at index %u\n", idx); + return srtp_err_status_algo_fail; + } + + return srtp_err_status_ok; +} + +srtp_err_status_t test_replay_dbx(int num_trials, unsigned long ws) +{ + srtp_rdbx_t rdbx; + uint32_t idx, ircvd; + ut_connection utc; + srtp_err_status_t status; + int num_fp_trials; + + status = srtp_rdbx_init(&rdbx, ws); + if (status) { + printf("replay_init failed with error code %d\n", status); + exit(1); + } + + /* + * test sequential insertion + */ + printf("\ttesting sequential insertion..."); + for (idx = 0; (int)idx < num_trials; idx++) { + status = rdbx_check_add(&rdbx, idx); + if (status) + return status; + } + printf("passed\n"); + + /* + * test for false positives by checking all of the index + * values which we've just added + * + * note that we limit the number of trials here, since allowing the + * rollover counter to roll over would defeat this test + */ + num_fp_trials = num_trials % 0x10000; + if (num_fp_trials == 0) { + printf("warning: no false positive tests performed\n"); + } + printf("\ttesting for false positives..."); + for (idx = 0; (int)idx < num_fp_trials; idx++) { + status = rdbx_check_expect_failure(&rdbx, idx); + if (status) + return status; + } + printf("passed\n"); + + /* re-initialize */ + srtp_rdbx_dealloc(&rdbx); + + if (srtp_rdbx_init(&rdbx, ws) != srtp_err_status_ok) { + printf("replay_init failed\n"); + return srtp_err_status_init_fail; + } + + /* + * test non-sequential insertion + * + * this test covers only fase negatives, since the values returned + * by ut_next_index(...) are distinct + */ + ut_init(&utc); + + printf("\ttesting non-sequential insertion..."); + for (idx = 0; (int)idx < num_trials; idx++) { + ircvd = ut_next_index(&utc); + status = rdbx_check_add_unordered(&rdbx, ircvd); + if (status) + return status; + status = rdbx_check_expect_failure(&rdbx, ircvd); + if (status) + return status; + } + printf("passed\n"); + + /* re-initialize */ + srtp_rdbx_dealloc(&rdbx); + + if (srtp_rdbx_init(&rdbx, ws) != srtp_err_status_ok) { + printf("replay_init failed\n"); + return srtp_err_status_init_fail; + } + + /* + * test insertion with large gaps. + * check for false positives for each insertion. + */ + printf("\ttesting insertion with large gaps..."); + for (idx = 0, ircvd = 0; (int)idx < num_trials; + idx++, ircvd += (1 << (srtp_cipher_rand_u32_for_tests() % 12))) { + status = rdbx_check_add(&rdbx, ircvd); + if (status) + return status; + status = rdbx_check_expect_failure(&rdbx, ircvd); + if (status) + return status; + } + printf("passed\n"); + + srtp_rdbx_dealloc(&rdbx); + + return srtp_err_status_ok; +} + +#include <time.h> /* for clock() */ + +double rdbx_check_adds_per_second(int num_trials, unsigned long ws) +{ + uint32_t i; + int delta; + srtp_rdbx_t rdbx; + srtp_xtd_seq_num_t est; + clock_t timer; + int failures; /* count number of failures */ + + if (srtp_rdbx_init(&rdbx, ws) != srtp_err_status_ok) { + printf("replay_init failed\n"); + exit(1); + } + + failures = 0; + timer = clock(); + for (i = 0; (int)i < num_trials; i++) { + delta = srtp_index_guess(&rdbx.index, &est, i); + + if (srtp_rdbx_check(&rdbx, delta) != srtp_err_status_ok) + ++failures; + else if (srtp_rdbx_add_index(&rdbx, delta) != srtp_err_status_ok) + ++failures; + } + timer = clock() - timer; + if (timer < 1) { + timer = 1; + } + + printf("number of failures: %d \n", failures); + + srtp_rdbx_dealloc(&rdbx); + + return (double)CLOCKS_PER_SEC * num_trials / timer; +} diff --git a/third_party/libsrtp/src/test/replay_driver.c b/third_party/libsrtp/src/test/replay_driver.c new file mode 100644 index 0000000000..9807e50c12 --- /dev/null +++ b/third_party/libsrtp/src/test/replay_driver.c @@ -0,0 +1,279 @@ +/* + * replay_driver.c + * + * A driver for the replay_database implementation + * + * David A. McGrew + * Cisco Systems, Inc. + */ + +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> + +#include "rdb.h" +#include "ut_sim.h" + +#include "cipher_priv.h" + +/* + * num_trials defines the number of trials that are used in the + * validation functions below + */ + +unsigned num_trials = 1 << 16; + +srtp_err_status_t test_rdb_db(void); + +double rdb_check_adds_per_second(void); + +int main(void) +{ + srtp_err_status_t err; + + printf("testing anti-replay database (srtp_rdb_t)...\n"); + err = test_rdb_db(); + if (err) { + printf("failed\n"); + exit(1); + } + printf("done\n"); + + printf("rdb_check/rdb_adds per second: %e\n", rdb_check_adds_per_second()); + + return 0; +} + +srtp_err_status_t rdb_check_add(srtp_rdb_t *rdb, uint32_t idx) +{ + if (srtp_rdb_check(rdb, idx) != srtp_err_status_ok) { + printf("rdb_check failed at index %u\n", idx); + return srtp_err_status_fail; + } + if (srtp_rdb_add_index(rdb, idx) != srtp_err_status_ok) { + printf("rdb_add_index failed at index %u\n", idx); + return srtp_err_status_fail; + } + + return srtp_err_status_ok; +} + +srtp_err_status_t rdb_check_expect_failure(srtp_rdb_t *rdb, uint32_t idx) +{ + srtp_err_status_t err; + + err = srtp_rdb_check(rdb, idx); + if ((err != srtp_err_status_replay_old) && + (err != srtp_err_status_replay_fail)) { + printf("rdb_check failed at index %u (false positive)\n", idx); + return srtp_err_status_fail; + } + + return srtp_err_status_ok; +} + +srtp_err_status_t rdb_check_add_unordered(srtp_rdb_t *rdb, uint32_t idx) +{ + srtp_err_status_t rstat; + + /* printf("index: %u\n", idx); */ + rstat = srtp_rdb_check(rdb, idx); + if ((rstat != srtp_err_status_ok) && + (rstat != srtp_err_status_replay_old)) { + printf("rdb_check_add_unordered failed at index %u\n", idx); + return rstat; + } + if (rstat == srtp_err_status_replay_old) { + return srtp_err_status_ok; + } + if (srtp_rdb_add_index(rdb, idx) != srtp_err_status_ok) { + printf("rdb_add_index failed at index %u\n", idx); + return srtp_err_status_fail; + } + + return srtp_err_status_ok; +} + +srtp_err_status_t test_rdb_db() +{ + srtp_rdb_t rdb; + uint32_t idx, ircvd; + ut_connection utc; + srtp_err_status_t err; + + if (srtp_rdb_init(&rdb) != srtp_err_status_ok) { + printf("rdb_init failed\n"); + return srtp_err_status_init_fail; + } + + /* test sequential insertion */ + for (idx = 0; idx < num_trials; idx++) { + err = rdb_check_add(&rdb, idx); + if (err) + return err; + } + + /* test for false positives */ + for (idx = 0; idx < num_trials; idx++) { + err = rdb_check_expect_failure(&rdb, idx); + if (err) + return err; + } + + /* re-initialize */ + if (srtp_rdb_init(&rdb) != srtp_err_status_ok) { + printf("rdb_init failed\n"); + return srtp_err_status_fail; + } + + /* test non-sequential insertion */ + ut_init(&utc); + + for (idx = 0; idx < num_trials; idx++) { + ircvd = ut_next_index(&utc); + err = rdb_check_add_unordered(&rdb, ircvd); + if (err) + return err; + err = rdb_check_expect_failure(&rdb, ircvd); + if (err) + return err; + } + + /* re-initialize */ + if (srtp_rdb_init(&rdb) != srtp_err_status_ok) { + printf("rdb_init failed\n"); + return srtp_err_status_fail; + } + + /* test insertion with large gaps */ + for (idx = 0, ircvd = 0; idx < num_trials; + idx++, ircvd += (1 << (srtp_cipher_rand_u32_for_tests() % 10))) { + err = rdb_check_add(&rdb, ircvd); + if (err) + return err; + err = rdb_check_expect_failure(&rdb, ircvd); + if (err) + return err; + } + + /* re-initialize */ + if (srtp_rdb_init(&rdb) != srtp_err_status_ok) { + printf("rdb_init failed\n"); + return srtp_err_status_fail; + } + + /* test loss of first 513 packets */ + for (idx = 0; idx < num_trials; idx++) { + err = rdb_check_add(&rdb, idx + 513); + if (err) + return err; + } + + /* test for false positives */ + for (idx = 0; idx < num_trials + 513; idx++) { + err = rdb_check_expect_failure(&rdb, idx); + if (err) + return err; + } + + /* test for key expired */ + if (srtp_rdb_init(&rdb) != srtp_err_status_ok) { + printf("rdb_init failed\n"); + return srtp_err_status_fail; + } + rdb.window_start = 0x7ffffffe; + if (srtp_rdb_increment(&rdb) != srtp_err_status_ok) { + printf("srtp_rdb_increment of 0x7ffffffe failed\n"); + return srtp_err_status_fail; + } + if (srtp_rdb_get_value(&rdb) != 0x7fffffff) { + printf("rdb valiue was not 0x7fffffff\n"); + return srtp_err_status_fail; + } + if (srtp_rdb_increment(&rdb) != srtp_err_status_key_expired) { + printf("srtp_rdb_increment of 0x7fffffff did not return " + "srtp_err_status_key_expired\n"); + return srtp_err_status_fail; + } + if (srtp_rdb_get_value(&rdb) != 0x7fffffff) { + printf("rdb valiue was not 0x7fffffff\n"); + return srtp_err_status_fail; + } + + return srtp_err_status_ok; +} + +#include <time.h> /* for clock() */ +#include <stdlib.h> /* for random() */ + +#define REPLAY_NUM_TRIALS 10000000 + +double rdb_check_adds_per_second(void) +{ + uint32_t i; + srtp_rdb_t rdb; + clock_t timer; + int failures = 0; /* count number of failures */ + + if (srtp_rdb_init(&rdb) != srtp_err_status_ok) { + printf("rdb_init failed\n"); + exit(1); + } + + timer = clock(); + for (i = 0; i < REPLAY_NUM_TRIALS; i += 3) { + if (srtp_rdb_check(&rdb, i + 2) != srtp_err_status_ok) + ++failures; + if (srtp_rdb_add_index(&rdb, i + 2) != srtp_err_status_ok) + ++failures; + if (srtp_rdb_check(&rdb, i + 1) != srtp_err_status_ok) + ++failures; + if (srtp_rdb_add_index(&rdb, i + 1) != srtp_err_status_ok) + ++failures; + if (srtp_rdb_check(&rdb, i) != srtp_err_status_ok) + ++failures; + if (srtp_rdb_add_index(&rdb, i) != srtp_err_status_ok) + ++failures; + } + timer = clock() - timer; + + return (double)CLOCKS_PER_SEC * REPLAY_NUM_TRIALS / timer; +} diff --git a/third_party/libsrtp/src/test/roc_driver.c b/third_party/libsrtp/src/test/roc_driver.c new file mode 100644 index 0000000000..439862039a --- /dev/null +++ b/third_party/libsrtp/src/test/roc_driver.c @@ -0,0 +1,170 @@ +/* + * roc_driver.c + * + * test driver for rollover counter replay implementation + * + * David A. McGrew + * Cisco Systems, Inc. + */ + +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> + +/* + * defining ROC_TEST causes small datatypes to be used in + * srtp_xtd_seq_num_t - this allows the functions to be exhaustively tested. + */ +#if ROC_NEEDS_TO_BE_TESTED +#define ROC_TEST +#endif + +#include "rdbx.h" +#include "ut_sim.h" + +srtp_err_status_t roc_test(int num_trials); + +int main(void) +{ + srtp_err_status_t status; + + printf("rollover counter test driver\n" + "David A. McGrew\n" + "Cisco Systems, Inc.\n"); + + printf("testing index functions..."); + status = roc_test(1 << 18); + if (status) { + printf("failed\n"); + exit(status); + } + printf("passed\n"); + return 0; +} + +#define ROC_VERBOSE 0 + +srtp_err_status_t roc_test(int num_trials) +{ + srtp_xtd_seq_num_t local, est, ref; + ut_connection utc; + int i, num_bad_est = 0; + int delta; + uint32_t ircvd; + double failure_rate; + + srtp_index_init(&local); + srtp_index_init(&ref); + srtp_index_init(&est); + + printf("\n\ttesting sequential insertion..."); + for (i = 0; i < 2048; i++) { + srtp_index_guess(&local, &est, (uint16_t)ref); +#if ROC_VERBOSE + printf("%lld, %lld, %d\n", ref, est, i); +#endif + if (ref != est) { +#if ROC_VERBOSE + printf(" *bad estimate*\n"); +#endif + ++num_bad_est; + } + srtp_index_advance(&ref, 1); + } + failure_rate = (double)num_bad_est / num_trials; + if (failure_rate > 0.01) { + printf("error: failure rate too high (%d bad estimates in %d trials)\n", + num_bad_est, num_trials); + return srtp_err_status_algo_fail; + } + printf("done\n"); + + printf("\ttesting non-sequential insertion..."); + srtp_index_init(&local); + srtp_index_init(&ref); + srtp_index_init(&est); + ut_init(&utc); + + for (i = 0; i < num_trials; i++) { + /* get next seq num from unreliable transport simulator */ + ircvd = ut_next_index(&utc); + + /* set ref to value of ircvd */ + ref = ircvd; + + /* estimate index based on low bits of ircvd */ + delta = srtp_index_guess(&local, &est, (uint16_t)ref); +#if ROC_VERBOSE + printf("ref: %lld, local: %lld, est: %lld, ircvd: %d, delta: %d\n", ref, + local, est, ircvd, delta); +#endif + + if (local + delta != est) { + printf(" *bad delta*: local %llu + delta %d != est %llu\n", + (unsigned long long)local, delta, (unsigned long long)est); + return srtp_err_status_algo_fail; + } + + /* now update local srtp_xtd_seq_num_t as necessary */ + if (delta > 0) + srtp_index_advance(&local, delta); + + if (ref != est) { +#if ROC_VERBOSE + printf(" *bad estimate*\n"); +#endif + /* record failure event */ + ++num_bad_est; + + /* reset local value to correct value */ + local = ref; + } + } + failure_rate = (double)num_bad_est / num_trials; + if (failure_rate > 0.01) { + printf("error: failure rate too high (%d bad estimates in %d trials)\n", + num_bad_est, num_trials); + return srtp_err_status_algo_fail; + } + printf("done\n"); + + return srtp_err_status_ok; +} diff --git a/third_party/libsrtp/src/test/rtp.c b/third_party/libsrtp/src/test/rtp.c new file mode 100644 index 0000000000..70248ee2b5 --- /dev/null +++ b/third_party/libsrtp/src/test/rtp.c @@ -0,0 +1,229 @@ +/* + * rtp.c + * + * library functions for the real-time transport protocol + * + * David A. McGrew + * Cisco Systems, Inc. + */ + +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#include "rtp.h" + +#include <stdio.h> +#include <string.h> + +#include <sys/types.h> +#ifdef HAVE_SYS_SOCKET_H +#include <sys/socket.h> +#endif + +#include "cipher_priv.h" + +#define PRINT_DEBUG 0 /* set to 1 to print out debugging data */ +#define VERBOSE_DEBUG 0 /* set to 1 to print out more data */ + +int rtp_sendto(rtp_sender_t sender, const void *msg, int len) +{ + int octets_sent; + srtp_err_status_t stat; + int pkt_len = len + RTP_HEADER_LEN; + + /* marshal data */ + strncpy(sender->message.body, msg, len); + + /* update header */ + sender->message.header.seq = ntohs(sender->message.header.seq) + 1; + sender->message.header.seq = htons(sender->message.header.seq); + sender->message.header.ts = ntohl(sender->message.header.ts) + 1; + sender->message.header.ts = htonl(sender->message.header.ts); + + /* apply srtp */ + stat = srtp_protect(sender->srtp_ctx, &sender->message.header, &pkt_len); + if (stat) { +#if PRINT_DEBUG + fprintf(stderr, "error: srtp protection failed with code %d\n", stat); +#endif + return -1; + } +#if VERBOSE_DEBUG + srtp_print_packet(&sender->message.header, pkt_len); +#endif + octets_sent = + sendto(sender->socket, (void *)&sender->message, pkt_len, 0, + (struct sockaddr *)&sender->addr, sizeof(struct sockaddr_in)); + + if (octets_sent != pkt_len) { +#if PRINT_DEBUG + fprintf(stderr, "error: couldn't send message %s", (char *)msg); + perror(""); +#endif + } + + return octets_sent; +} + +int rtp_recvfrom(rtp_receiver_t receiver, void *msg, int *len) +{ + int octets_recvd; + srtp_err_status_t stat; + + octets_recvd = recvfrom(receiver->socket, (void *)&receiver->message, *len, + 0, (struct sockaddr *)NULL, 0); + + if (octets_recvd == -1) { + *len = 0; + return -1; + } + + /* verify rtp header */ + if (receiver->message.header.version != 2) { + *len = 0; + return -1; + } + +#if PRINT_DEBUG + fprintf(stderr, "%d octets received from SSRC %u\n", octets_recvd, + receiver->message.header.ssrc); +#endif +#if VERBOSE_DEBUG + srtp_print_packet(&receiver->message.header, octets_recvd); +#endif + + /* apply srtp */ + stat = srtp_unprotect(receiver->srtp_ctx, &receiver->message.header, + &octets_recvd); + if (stat) { + fprintf(stderr, "error: srtp unprotection failed with code %d%s\n", + stat, + stat == srtp_err_status_replay_fail + ? " (replay check failed)" + : stat == srtp_err_status_auth_fail ? " (auth check failed)" + : ""); + return -1; + } + strncpy(msg, receiver->message.body, octets_recvd); + + return octets_recvd; +} + +int rtp_sender_init(rtp_sender_t sender, + int sock, + struct sockaddr_in addr, + unsigned int ssrc) +{ + /* set header values */ + sender->message.header.ssrc = htonl(ssrc); + sender->message.header.ts = 0; + sender->message.header.seq = (uint16_t)srtp_cipher_rand_u32_for_tests(); + sender->message.header.m = 0; + sender->message.header.pt = 0x1; + sender->message.header.version = 2; + sender->message.header.p = 0; + sender->message.header.x = 0; + sender->message.header.cc = 0; + + /* set other stuff */ + sender->socket = sock; + sender->addr = addr; + + return 0; +} + +int rtp_receiver_init(rtp_receiver_t rcvr, + int sock, + struct sockaddr_in addr, + unsigned int ssrc) +{ + /* set header values */ + rcvr->message.header.ssrc = htonl(ssrc); + rcvr->message.header.ts = 0; + rcvr->message.header.seq = 0; + rcvr->message.header.m = 0; + rcvr->message.header.pt = 0x1; + rcvr->message.header.version = 2; + rcvr->message.header.p = 0; + rcvr->message.header.x = 0; + rcvr->message.header.cc = 0; + + /* set other stuff */ + rcvr->socket = sock; + rcvr->addr = addr; + + return 0; +} + +int rtp_sender_init_srtp(rtp_sender_t sender, const srtp_policy_t *policy) +{ + return srtp_create(&sender->srtp_ctx, policy); +} + +int rtp_sender_deinit_srtp(rtp_sender_t sender) +{ + return srtp_dealloc(sender->srtp_ctx); +} + +int rtp_receiver_init_srtp(rtp_receiver_t sender, const srtp_policy_t *policy) +{ + return srtp_create(&sender->srtp_ctx, policy); +} + +int rtp_receiver_deinit_srtp(rtp_receiver_t sender) +{ + return srtp_dealloc(sender->srtp_ctx); +} + +rtp_sender_t rtp_sender_alloc(void) +{ + return (rtp_sender_t)malloc(sizeof(rtp_sender_ctx_t)); +} + +void rtp_sender_dealloc(rtp_sender_t rtp_ctx) +{ + free(rtp_ctx); +} + +rtp_receiver_t rtp_receiver_alloc(void) +{ + return (rtp_receiver_t)malloc(sizeof(rtp_receiver_ctx_t)); +} + +void rtp_receiver_dealloc(rtp_receiver_t rtp_ctx) +{ + free(rtp_ctx); +} diff --git a/third_party/libsrtp/src/test/rtp.h b/third_party/libsrtp/src/test/rtp.h new file mode 100644 index 0000000000..37921a665c --- /dev/null +++ b/third_party/libsrtp/src/test/rtp.h @@ -0,0 +1,155 @@ +/* + * rtp.h + * + * rtp interface for srtp reference implementation + * + * David A. McGrew + * Cisco Systems, Inc. + * + * data types: + * + * rtp_msg_t an rtp message (the data that goes on the wire) + * rtp_sender_t sender side socket and rtp info + * rtp_receiver_t receiver side socket and rtp info + * + */ + +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef SRTP_RTP_H +#define SRTP_RTP_H + +#ifdef HAVE_NETINET_IN_H +#include <netinet/in.h> +#elif defined HAVE_WINSOCK2_H +#include <winsock2.h> +#endif + +#include "srtp_priv.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * RTP_HEADER_LEN indicates the size of an RTP header + */ +#define RTP_HEADER_LEN 12 + +/* + * RTP_MAX_BUF_LEN defines the largest RTP packet in the rtp.c implementation + */ +#define RTP_MAX_BUF_LEN 16384 + +typedef srtp_hdr_t rtp_hdr_t; + +typedef struct { + srtp_hdr_t header; + char body[RTP_MAX_BUF_LEN]; +} rtp_msg_t; + +typedef struct rtp_sender_ctx_t { + rtp_msg_t message; + int socket; + srtp_ctx_t *srtp_ctx; + struct sockaddr_in addr; /* reciever's address */ +} rtp_sender_ctx_t; + +typedef struct rtp_receiver_ctx_t { + rtp_msg_t message; + int socket; + srtp_ctx_t *srtp_ctx; + struct sockaddr_in addr; /* receiver's address */ +} rtp_receiver_ctx_t; + +typedef struct rtp_sender_ctx_t *rtp_sender_t; + +typedef struct rtp_receiver_ctx_t *rtp_receiver_t; + +int rtp_sendto(rtp_sender_t sender, const void *msg, int len); + +int rtp_recvfrom(rtp_receiver_t receiver, void *msg, int *len); + +int rtp_receiver_init(rtp_receiver_t rcvr, + int sock, + struct sockaddr_in addr, + unsigned int ssrc); + +int rtp_sender_init(rtp_sender_t sender, + int sock, + struct sockaddr_in addr, + unsigned int ssrc); + +/* + * srtp_sender_init(...) initializes an rtp_sender_t + */ + +int srtp_sender_init( + rtp_sender_t rtp_ctx, /* structure to be init'ed */ + struct sockaddr_in name, /* socket name */ + srtp_sec_serv_t security_services, /* sec. servs. to be used */ + unsigned char *input_key /* master key/salt in hex */ + ); + +int srtp_receiver_init( + rtp_receiver_t rtp_ctx, /* structure to be init'ed */ + struct sockaddr_in name, /* socket name */ + srtp_sec_serv_t security_services, /* sec. servs. to be used */ + unsigned char *input_key /* master key/salt in hex */ + ); + +int rtp_sender_init_srtp(rtp_sender_t sender, const srtp_policy_t *policy); + +int rtp_sender_deinit_srtp(rtp_sender_t sender); + +int rtp_receiver_init_srtp(rtp_receiver_t sender, const srtp_policy_t *policy); + +int rtp_receiver_deinit_srtp(rtp_receiver_t sender); + +rtp_sender_t rtp_sender_alloc(void); + +void rtp_sender_dealloc(rtp_sender_t rtp_ctx); + +rtp_receiver_t rtp_receiver_alloc(void); + +void rtp_receiver_dealloc(rtp_receiver_t rtp_ctx); + +#ifdef __cplusplus +} +#endif + +#endif /* SRTP_RTP_H */ diff --git a/third_party/libsrtp/src/test/rtp_decoder.c b/third_party/libsrtp/src/test/rtp_decoder.c new file mode 100644 index 0000000000..137e7e6b39 --- /dev/null +++ b/third_party/libsrtp/src/test/rtp_decoder.c @@ -0,0 +1,770 @@ +/* + * rtp_decoder.c + * + * decoder structures and functions for SRTP pcap decoder + * + * Example: + * $ wget --no-check-certificate \ + * https://raw.githubusercontent.com/gteissier/srtp-decrypt/master/marseillaise-srtp.pcap + * $ ./test/rtp_decoder -a -t 10 -e 128 -b \ + * aSBrbm93IGFsbCB5b3VyIGxpdHRsZSBzZWNyZXRz \ + * < ~/marseillaise-srtp.pcap \ + * | text2pcap -t "%M:%S." -u 10000,10000 - - \ + * > ./marseillaise-rtp.pcap + * + * There is also a different way of setting up key size and tag size + * based upon RFC 4568 crypto suite specification, i.e.: + * + * $ ./test/rtp_decoder -s AES_CM_128_HMAC_SHA1_80 -b \ + * aSBrbm93IGFsbCB5b3VyIGxpdHRsZSBzZWNyZXRz ... + * + * Audio can be extracted using extractaudio utility from the RTPproxy + * package: + * + * $ extractaudio -A ./marseillaise-rtp.pcap ./marseillaise-out.wav + * + * Bernardo Torres <bernardo@torresautomacao.com.br> + * + * Some structure and code from https://github.com/gteissier/srtp-decrypt + */ +/* + * + * Copyright (c) 2001-2017 Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ +#include "getopt_s.h" /* for local getopt() */ +#include <assert.h> /* for assert() */ + +#include <pcap.h> +#include "rtp_decoder.h" +#include "util.h" + +#ifndef timersub +#define timersub(a, b, result) \ + do { \ + (result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \ + (result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \ + if ((result)->tv_usec < 0) { \ + --(result)->tv_sec; \ + (result)->tv_usec += 1000000; \ + } \ + } while (0) +#endif + +#define MAX_KEY_LEN 96 +#define MAX_FILTER 256 +#define MAX_FILE 255 + +struct srtp_crypto_suite { + const char *can_name; + int gcm_on; + int key_size; + int tag_size; +}; + +static struct srtp_crypto_suite srtp_crypto_suites[] = { +#if 0 + {.can_name = "F8_128_HMAC_SHA1_32", .gcm_on = 0, .key_size = 128, .tag_size = 4}, +#endif + {.can_name = "AES_CM_128_HMAC_SHA1_32", + .gcm_on = 0, + .key_size = 128, + .tag_size = 4 }, + {.can_name = "AES_CM_128_HMAC_SHA1_80", + .gcm_on = 0, + .key_size = 128, + .tag_size = 10 }, + {.can_name = "AES_192_CM_HMAC_SHA1_32", + .gcm_on = 0, + .key_size = 192, + .tag_size = 4 }, + {.can_name = "AES_192_CM_HMAC_SHA1_80", + .gcm_on = 0, + .key_size = 192, + .tag_size = 10 }, + {.can_name = "AES_256_CM_HMAC_SHA1_32", + .gcm_on = 0, + .key_size = 256, + .tag_size = 4 }, + {.can_name = "AES_256_CM_HMAC_SHA1_80", + .gcm_on = 0, + .key_size = 256, + .tag_size = 10 }, + {.can_name = "AEAD_AES_128_GCM", + .gcm_on = 1, + .key_size = 128, + .tag_size = 16 }, + {.can_name = "AEAD_AES_256_GCM", + .gcm_on = 1, + .key_size = 256, + .tag_size = 16 }, + {.can_name = NULL } +}; + +void rtp_decoder_srtp_log_handler(srtp_log_level_t level, + const char *msg, + void *data) +{ + char level_char = '?'; + switch (level) { + case srtp_log_level_error: + level_char = 'e'; + break; + case srtp_log_level_warning: + level_char = 'w'; + break; + case srtp_log_level_info: + level_char = 'i'; + break; + case srtp_log_level_debug: + level_char = 'd'; + break; + } + fprintf(stderr, "SRTP-LOG [%c]: %s\n", level_char, msg); +} + +int main(int argc, char *argv[]) +{ + char errbuf[PCAP_ERRBUF_SIZE]; + bpf_u_int32 pcap_net = 0; + pcap_t *pcap_handle; +#if BEW + struct sockaddr_in local; +#endif + srtp_sec_serv_t sec_servs = sec_serv_none; + int c; + struct srtp_crypto_suite scs, *i_scsp; + scs.key_size = 128; + scs.tag_size = 0; + int gcm_on = 0; + char *input_key = NULL; + int b64_input = 0; + char key[MAX_KEY_LEN]; + struct bpf_program fp; + char filter_exp[MAX_FILTER] = ""; + char pcap_file[MAX_FILE] = "-"; + int rtp_packet_offset = DEFAULT_RTP_OFFSET; + rtp_decoder_t dec; + srtp_policy_t policy = { { 0 } }; + rtp_decoder_mode_t mode = mode_rtp; + srtp_err_status_t status; + int len; + int expected_len; + int do_list_mods = 0; + + fprintf(stderr, "Using %s [0x%x]\n", srtp_get_version_string(), + srtp_get_version()); + + /* initialize srtp library */ + status = srtp_init(); + if (status) { + fprintf(stderr, + "error: srtp initialization failed with error code %d\n", + status); + exit(1); + } + + status = srtp_install_log_handler(rtp_decoder_srtp_log_handler, NULL); + if (status) { + fprintf(stderr, "error: install log handler failed\n"); + exit(1); + } + + /* check args */ + while (1) { + c = getopt_s(argc, argv, "b:k:gt:ae:ld:f:s:m:p:o:"); + if (c == -1) { + break; + } + switch (c) { + case 'b': + b64_input = 1; + /* fall thru */ + case 'k': + input_key = optarg_s; + break; + case 'e': + scs.key_size = atoi(optarg_s); + if (scs.key_size != 128 && scs.key_size != 192 && + scs.key_size != 256) { + fprintf( + stderr, + "error: encryption key size must be 128, 192 or 256 (%d)\n", + scs.key_size); + exit(1); + } + input_key = malloc(scs.key_size); + sec_servs |= sec_serv_conf; + break; + case 't': + scs.tag_size = atoi(optarg_s); + break; + case 'a': + sec_servs |= sec_serv_auth; + break; + case 'g': + gcm_on = 1; + sec_servs |= sec_serv_auth; + break; + case 'd': + status = srtp_set_debug_module(optarg_s, 1); + if (status) { + fprintf(stderr, "error: set debug module (%s) failed\n", + optarg_s); + exit(1); + } + break; + case 'f': + if (strlen(optarg_s) > MAX_FILTER) { + fprintf(stderr, "error: filter bigger than %d characters\n", + MAX_FILTER); + exit(1); + } + fprintf(stderr, "Setting filter as %s\n", optarg_s); + strcpy(filter_exp, optarg_s); + break; + case 'l': + do_list_mods = 1; + break; + case 's': + for (i_scsp = &srtp_crypto_suites[0]; i_scsp->can_name != NULL; + i_scsp++) { + if (strcasecmp(i_scsp->can_name, optarg_s) == 0) { + break; + } + } + if (i_scsp->can_name == NULL) { + fprintf(stderr, "Unknown/unsupported crypto suite name %s\n", + optarg_s); + exit(1); + } + scs = *i_scsp; + input_key = malloc(scs.key_size); + sec_servs |= sec_serv_conf | sec_serv_auth; + gcm_on = scs.gcm_on; + break; + case 'm': + if (strcasecmp("rtp", optarg_s) == 0) { + mode = mode_rtp; + } else if (strcasecmp("rtcp", optarg_s) == 0) { + mode = mode_rtcp; + } else if (strcasecmp("rtcp-mux", optarg_s) == 0) { + mode = mode_rtcp_mux; + } else { + fprintf(stderr, "Unknown/unsupported mode %s\n", optarg_s); + exit(1); + } + break; + case 'p': + if (strlen(optarg_s) > MAX_FILE) { + fprintf(stderr, + "error: pcap file path bigger than %d characters\n", + MAX_FILE); + exit(1); + } + strcpy(pcap_file, optarg_s); + break; + case 'o': + rtp_packet_offset = atoi(optarg_s); + break; + default: + usage(argv[0]); + } + } + + if (scs.tag_size == 0) { + if (gcm_on) { + scs.tag_size = 16; + } else { + scs.tag_size = 10; + } + } + + if (gcm_on && scs.tag_size != 8 && scs.tag_size != 16) { + fprintf(stderr, "error: GCM tag size must be 8 or 16 (%d)\n", + scs.tag_size); + exit(1); + } + + if (!gcm_on && scs.tag_size != 4 && scs.tag_size != 10) { + fprintf(stderr, "error: non GCM tag size must be 4 or 10 (%d)\n", + scs.tag_size); + exit(1); + } + + if (do_list_mods) { + status = srtp_list_debug_modules(); + if (status) { + fprintf(stderr, "error: list of debug modules failed\n"); + exit(1); + } + return 0; + } + + if ((sec_servs && !input_key) || (!sec_servs && input_key)) { + /* + * a key must be provided if and only if security services have + * been requested + */ + if (input_key == NULL) { + fprintf(stderr, "key not provided\n"); + } + if (!sec_servs) { + fprintf(stderr, "no secservs\n"); + } + fprintf(stderr, "provided\n"); + usage(argv[0]); + } + + /* report security services selected on the command line */ + fprintf(stderr, "security services: "); + if (sec_servs & sec_serv_conf) + fprintf(stderr, "confidentiality "); + if (sec_servs & sec_serv_auth) + fprintf(stderr, "message authentication"); + if (sec_servs == sec_serv_none) + fprintf(stderr, "none"); + fprintf(stderr, "\n"); + + /* set up the srtp policy and master key */ + if (sec_servs) { + /* + * create policy structure, using the default mechanisms but + * with only the security services requested on the command line, + * using the right SSRC value + */ + switch (sec_servs) { + case sec_serv_conf_and_auth: + if (gcm_on) { +#ifdef OPENSSL + switch (scs.key_size) { + case 128: + if (scs.tag_size == 16) { + srtp_crypto_policy_set_aes_gcm_128_16_auth(&policy.rtp); + srtp_crypto_policy_set_aes_gcm_128_16_auth( + &policy.rtcp); + } else { + srtp_crypto_policy_set_aes_gcm_128_8_auth(&policy.rtp); + srtp_crypto_policy_set_aes_gcm_128_8_auth(&policy.rtcp); + } + break; + case 256: + if (scs.tag_size == 16) { + srtp_crypto_policy_set_aes_gcm_256_16_auth(&policy.rtp); + srtp_crypto_policy_set_aes_gcm_256_16_auth( + &policy.rtcp); + } else { + srtp_crypto_policy_set_aes_gcm_256_8_auth(&policy.rtp); + srtp_crypto_policy_set_aes_gcm_256_8_auth(&policy.rtcp); + } + break; + } +#else + fprintf(stderr, "error: GCM mode only supported when using the " + "OpenSSL crypto engine.\n"); + return 0; +#endif + } else { + switch (scs.key_size) { + case 128: + if (scs.tag_size == 4) { + srtp_crypto_policy_set_aes_cm_128_hmac_sha1_32( + &policy.rtp); + srtp_crypto_policy_set_aes_cm_128_hmac_sha1_80( + &policy.rtcp); + } else { + srtp_crypto_policy_set_aes_cm_128_hmac_sha1_80( + &policy.rtp); + srtp_crypto_policy_set_aes_cm_128_hmac_sha1_80( + &policy.rtcp); + } + break; + case 192: +#ifdef OPENSSL + if (scs.tag_size == 4) { + srtp_crypto_policy_set_aes_cm_192_hmac_sha1_32( + &policy.rtp); + srtp_crypto_policy_set_aes_cm_192_hmac_sha1_80( + &policy.rtcp); + } else { + srtp_crypto_policy_set_aes_cm_192_hmac_sha1_80( + &policy.rtp); + srtp_crypto_policy_set_aes_cm_192_hmac_sha1_80( + &policy.rtcp); + } +#else + fprintf(stderr, + "error: AES 192 mode only supported when using the " + "OpenSSL crypto engine.\n"); + return 0; + +#endif + break; + case 256: + if (scs.tag_size == 4) { + srtp_crypto_policy_set_aes_cm_256_hmac_sha1_32( + &policy.rtp); + srtp_crypto_policy_set_aes_cm_256_hmac_sha1_80( + &policy.rtcp); + } else { + srtp_crypto_policy_set_aes_cm_256_hmac_sha1_80( + &policy.rtp); + srtp_crypto_policy_set_aes_cm_256_hmac_sha1_80( + &policy.rtcp); + } + break; + } + } + break; + case sec_serv_conf: + if (gcm_on) { + fprintf( + stderr, + "error: GCM mode must always be used with auth enabled\n"); + return -1; + } else { + switch (scs.key_size) { + case 128: + srtp_crypto_policy_set_aes_cm_128_null_auth(&policy.rtp); + srtp_crypto_policy_set_aes_cm_128_hmac_sha1_80( + &policy.rtcp); + break; + case 192: +#ifdef OPENSSL + srtp_crypto_policy_set_aes_cm_192_null_auth(&policy.rtp); + srtp_crypto_policy_set_aes_cm_192_hmac_sha1_80( + &policy.rtcp); +#else + fprintf(stderr, + "error: AES 192 mode only supported when using the " + "OpenSSL crypto engine.\n"); + return 0; + +#endif + break; + case 256: + srtp_crypto_policy_set_aes_cm_256_null_auth(&policy.rtp); + srtp_crypto_policy_set_aes_cm_256_hmac_sha1_80( + &policy.rtcp); + break; + } + } + break; + case sec_serv_auth: + if (gcm_on) { +#ifdef OPENSSL + switch (scs.key_size) { + case 128: + srtp_crypto_policy_set_aes_gcm_128_8_only_auth(&policy.rtp); + srtp_crypto_policy_set_aes_gcm_128_8_only_auth( + &policy.rtcp); + break; + case 256: + srtp_crypto_policy_set_aes_gcm_256_8_only_auth(&policy.rtp); + srtp_crypto_policy_set_aes_gcm_256_8_only_auth( + &policy.rtcp); + break; + } +#else + printf("error: GCM mode only supported when using the OpenSSL " + "crypto engine.\n"); + return 0; +#endif + } else { + srtp_crypto_policy_set_null_cipher_hmac_sha1_80(&policy.rtp); + srtp_crypto_policy_set_rtcp_default(&policy.rtcp); + } + break; + default: + fprintf(stderr, "error: unknown security service requested\n"); + return -1; + } + + policy.key = (uint8_t *)key; + policy.next = NULL; + policy.window_size = 128; + policy.allow_repeat_tx = 0; + policy.rtp.sec_serv = sec_servs; + policy.rtcp.sec_serv = + sec_servs; // sec_serv_none; /* we don't do RTCP anyway */ + fprintf(stderr, "setting tag len %d\n", scs.tag_size); + policy.rtp.auth_tag_len = scs.tag_size; + + if (gcm_on && scs.tag_size != 8) { + fprintf(stderr, "set tag len %d\n", scs.tag_size); + policy.rtp.auth_tag_len = scs.tag_size; + } + + /* + * read key from hexadecimal or base64 on command line into an octet + * string + */ + if (b64_input) { + int pad; + expected_len = policy.rtp.cipher_key_len * 4 / 3; + len = base64_string_to_octet_string(key, &pad, input_key, + strlen(input_key)); + } else { + expected_len = policy.rtp.cipher_key_len * 2; + len = hex_string_to_octet_string(key, input_key, expected_len); + } + /* check that hex string is the right length */ + if (len < expected_len) { + fprintf(stderr, "error: too few digits in key/salt " + "(should be %d digits, found %d)\n", + expected_len, len); + exit(1); + } + if (strlen(input_key) > policy.rtp.cipher_key_len * 2) { + fprintf(stderr, "error: too many digits in key/salt " + "(should be %d hexadecimal digits, found %u)\n", + policy.rtp.cipher_key_len * 2, (unsigned)strlen(input_key)); + exit(1); + } + + int key_octets = (scs.key_size / 8); + int salt_octets = policy.rtp.cipher_key_len - key_octets; + fprintf(stderr, "set master key/salt to %s/", + octet_string_hex_string(key, key_octets)); + fprintf(stderr, "%s\n", + octet_string_hex_string(key + key_octets, salt_octets)); + + } else { + fprintf(stderr, + "error: neither encryption or authentication were selected\n"); + exit(1); + } + + pcap_handle = pcap_open_offline(pcap_file, errbuf); + + if (!pcap_handle) { + fprintf(stderr, "libpcap failed to open file '%s'\n", errbuf); + exit(1); + } + assert(pcap_handle != NULL); + if ((pcap_compile(pcap_handle, &fp, filter_exp, 1, pcap_net)) == -1) { + fprintf(stderr, "Couldn't parse filter %s: %s\n", filter_exp, + pcap_geterr(pcap_handle)); + return (2); + } + if (pcap_setfilter(pcap_handle, &fp) == -1) { + fprintf(stderr, "couldn't install filter %s: %s\n", filter_exp, + pcap_geterr(pcap_handle)); + return (2); + } + dec = rtp_decoder_alloc(); + if (dec == NULL) { + fprintf(stderr, "error: malloc() failed\n"); + exit(1); + } + fprintf(stderr, "Starting decoder\n"); + if (rtp_decoder_init(dec, policy, mode, rtp_packet_offset)) { + fprintf(stderr, "error: init failed\n"); + exit(1); + } + + pcap_loop(pcap_handle, 0, rtp_decoder_handle_pkt, (u_char *)dec); + + if (dec->mode == mode_rtp || dec->mode == mode_rtcp_mux) { + fprintf(stderr, "RTP packets decoded: %d\n", dec->rtp_cnt); + } + if (dec->mode == mode_rtcp || dec->mode == mode_rtcp_mux) { + fprintf(stderr, "RTCP packets decoded: %d\n", dec->rtcp_cnt); + } + fprintf(stderr, "Packet decode errors: %d\n", dec->error_cnt); + + rtp_decoder_deinit(dec); + rtp_decoder_dealloc(dec); + + status = srtp_shutdown(); + if (status) { + fprintf(stderr, "error: srtp shutdown failed with error code %d\n", + status); + exit(1); + } + + return 0; +} + +void usage(char *string) +{ + fprintf( + stderr, + "usage: %s [-d <debug>]* [[-k][-b] <key>] [-a][-t][-e] [-s " + "<srtp-crypto-suite>] [-m <mode>]\n" + "or %s -l\n" + "where -a use message authentication\n" + " -e <key size> use encryption (use 128 or 256 for key size)\n" + " -g Use AES-GCM mode (must be used with -e)\n" + " -t <tag size> Tag size to use (in GCM mode use 8 or 16)\n" + " -k <key> sets the srtp master key given in hexadecimal\n" + " -b <key> sets the srtp master key given in base64\n" + " -l list debug modules\n" + " -f \"<pcap filter>\" to filter only the desired SRTP packets\n" + " -d <debug> turn on debugging for module <debug>\n" + " -s \"<srtp-crypto-suite>\" to set both key and tag size based\n" + " on RFC4568-style crypto suite specification\n" + " -m <mode> set the mode to be one of [rtp]|rtcp|rtcp-mux\n" + " -p <pcap file> path to pcap file (defaults to stdin)\n" + " -o byte offset of RTP packet in capture (defaults to 42)\n", + string, string); + exit(1); +} + +rtp_decoder_t rtp_decoder_alloc(void) +{ + return (rtp_decoder_t)malloc(sizeof(rtp_decoder_ctx_t)); +} + +void rtp_decoder_dealloc(rtp_decoder_t rtp_ctx) +{ + free(rtp_ctx); +} + +int rtp_decoder_deinit(rtp_decoder_t decoder) +{ + if (decoder->srtp_ctx) { + return srtp_dealloc(decoder->srtp_ctx); + } + return 0; +} + +int rtp_decoder_init(rtp_decoder_t dcdr, + srtp_policy_t policy, + rtp_decoder_mode_t mode, + int rtp_packet_offset) +{ + dcdr->rtp_offset = rtp_packet_offset; + dcdr->srtp_ctx = NULL; + dcdr->start_tv.tv_usec = 0; + dcdr->start_tv.tv_sec = 0; + dcdr->frame_nr = -1; + dcdr->error_cnt = 0; + dcdr->rtp_cnt = 0; + dcdr->rtcp_cnt = 0; + dcdr->mode = mode; + dcdr->policy = policy; + dcdr->policy.ssrc.type = ssrc_any_inbound; + + if (srtp_create(&dcdr->srtp_ctx, &dcdr->policy)) { + return 1; + } + return 0; +} + +/* + * decodes key as base64 + */ + +void hexdump(const void *ptr, size_t size) +{ + int i, j; + const unsigned char *cptr = ptr; + + for (i = 0; i < size; i += 16) { + fprintf(stdout, "%04x ", i); + for (j = 0; j < 16 && i + j < size; j++) { + fprintf(stdout, "%02x ", cptr[i + j]); + } + fprintf(stdout, "\n"); + } +} + +void rtp_decoder_handle_pkt(u_char *arg, + const struct pcap_pkthdr *hdr, + const u_char *bytes) +{ + rtp_decoder_t dcdr = (rtp_decoder_t)arg; + rtp_msg_t message; + int rtp; + int pktsize; + struct timeval delta; + int octets_recvd; + srtp_err_status_t status; + dcdr->frame_nr++; + + if ((dcdr->start_tv.tv_sec == 0) && (dcdr->start_tv.tv_usec == 0)) { + dcdr->start_tv = hdr->ts; + } + + if (hdr->caplen < dcdr->rtp_offset) { + return; + } + const void *rtp_packet = bytes + dcdr->rtp_offset; + + memcpy((void *)&message, rtp_packet, hdr->caplen - dcdr->rtp_offset); + pktsize = hdr->caplen - dcdr->rtp_offset; + octets_recvd = pktsize; + + if (octets_recvd == -1) { + return; + } + + if (dcdr->mode == mode_rtp) { + rtp = 1; + } else if (dcdr->mode == mode_rtcp) { + rtp = 0; + } else { + rtp = 1; + if (octets_recvd >= 2) { + /* rfc5761 */ + u_char payload_type = *(bytes + dcdr->rtp_offset + 1) & 0x7f; + rtp = payload_type < 64 || payload_type > 95; + } + } + + if (rtp) { + /* verify rtp header */ + if (message.header.version != 2) { + return; + } + + status = srtp_unprotect(dcdr->srtp_ctx, &message, &octets_recvd); + if (status) { + dcdr->error_cnt++; + return; + } + dcdr->rtp_cnt++; + } else { + status = srtp_unprotect_rtcp(dcdr->srtp_ctx, &message, &octets_recvd); + if (status) { + dcdr->error_cnt++; + return; + } + dcdr->rtcp_cnt++; + } + timersub(&hdr->ts, &dcdr->start_tv, &delta); + fprintf(stdout, "%02ld:%02ld.%06ld\n", delta.tv_sec / 60, delta.tv_sec % 60, + (long)delta.tv_usec); + hexdump(&message, octets_recvd); +} diff --git a/third_party/libsrtp/src/test/rtp_decoder.h b/third_party/libsrtp/src/test/rtp_decoder.h new file mode 100644 index 0000000000..955caf640e --- /dev/null +++ b/third_party/libsrtp/src/test/rtp_decoder.h @@ -0,0 +1,117 @@ +/* + * rtp_decoder.h + * + * decoder structures and functions for SRTP pcap decoder + * + * Bernardo Torres <bernardo@torresautomacao.com.br> + * + * Some structure and code from https://github.com/gteissier/srtp-decrypt + * + */ +/* + * + * Copyright (c) 2001-2017 Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef RTP_DECODER_H +#define RTP_DECODER_H + +#include "srtp_priv.h" +#include "rtp.h" + +#define DEFAULT_RTP_OFFSET 42 + +typedef enum { + mode_rtp = 0, + mode_rtcp, + mode_rtcp_mux, +} rtp_decoder_mode_t; + +typedef struct rtp_decoder_ctx_t { + srtp_policy_t policy; + srtp_ctx_t *srtp_ctx; + rtp_decoder_mode_t mode; + int rtp_offset; + struct timeval start_tv; + int frame_nr; + int error_cnt; + int rtp_cnt; + int rtcp_cnt; +} rtp_decoder_ctx_t; + +typedef struct rtp_decoder_ctx_t *rtp_decoder_t; + +/* + * prints the output of a random buffer in hexadecimal + */ +void hexdump(const void *ptr, size_t size); + +/* + * the function usage() prints an error message describing how this + * program should be called, then calls exit() + */ +void usage(char *prog_name); + +/* + * transforms base64 key into octet + */ +char *decode_sdes(char *in, char *out); + +/* + * pcap handling + */ +void rtp_decoder_handle_pkt(u_char *arg, + const struct pcap_pkthdr *hdr, + const u_char *bytes); + +rtp_decoder_t rtp_decoder_alloc(void); + +void rtp_decoder_dealloc(rtp_decoder_t rtp_ctx); + +int rtp_decoder_init(rtp_decoder_t dcdr, + srtp_policy_t policy, + rtp_decoder_mode_t mode, + int rtp_packet_offset); + +int rtp_decoder_deinit(rtp_decoder_t decoder); + +void rtp_decoder_srtp_log_handler(srtp_log_level_t level, + const char *msg, + void *data); + +void rtp_decoder_srtp_log_handler(srtp_log_level_t level, + const char *msg, + void *data); + +#endif /* RTP_DECODER_H */ diff --git a/third_party/libsrtp/src/test/rtpw.c b/third_party/libsrtp/src/test/rtpw.c new file mode 100644 index 0000000000..ad84448298 --- /dev/null +++ b/third_party/libsrtp/src/test/rtpw.c @@ -0,0 +1,699 @@ +/* + * rtpw.c + * + * rtp word sender/receiver + * + * David A. McGrew + * Cisco Systems, Inc. + * + * This app is a simple RTP application intended only for testing + * libsrtp. It reads one word at a time from words.txt (or + * whatever file is specified as DICT_FILE or with -w), and sends one word out + * each USEC_RATE microseconds. Secure RTP protections can be + * applied. See the usage() function for more details. + * + */ + +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "getopt_s.h" /* for local getopt() */ + +#include <stdio.h> /* for printf, fprintf */ +#include <stdlib.h> /* for atoi() */ +#include <errno.h> +#include <signal.h> /* for signal() */ + +#include <string.h> /* for strncpy() */ +#include <time.h> /* for usleep() */ + +#ifdef HAVE_UNISTD_H +#include <unistd.h> /* for close() */ +#elif defined(_MSC_VER) +#include <io.h> /* for _close() */ +#define close _close +#endif +#ifdef HAVE_SYS_SOCKET_H +#include <sys/socket.h> +#endif +#ifdef HAVE_NETINET_IN_H +#include <netinet/in.h> +#elif defined HAVE_WINSOCK2_H +#include <winsock2.h> +#include <ws2tcpip.h> +#define RTPW_USE_WINSOCK2 1 +#endif +#ifdef HAVE_ARPA_INET_H +#include <arpa/inet.h> +#endif + +#include "srtp.h" +#include "rtp.h" +#include "util.h" + +#define DICT_FILE "words.txt" +#define USEC_RATE (5e5) +#define MAX_WORD_LEN 128 +#define ADDR_IS_MULTICAST(a) IN_MULTICAST(htonl(a)) +#define MAX_KEY_LEN 96 + +#ifndef HAVE_USLEEP +#ifdef HAVE_WINDOWS_H +#define usleep(us) Sleep(((DWORD)us) / 1000) +#else +#define usleep(us) sleep((us) / 1000000) +#endif +#endif + +/* + * the function usage() prints an error message describing how this + * program should be called, then calls exit() + */ + +void usage(char *prog_name); + +/* + * leave_group(...) de-registers from a multicast group + */ + +void leave_group(int sock, struct ip_mreq mreq, char *name); + +/* + * setup_signal_handler() sets up a signal handler to trigger + * cleanups after an interrupt + */ +int setup_signal_handler(char *name); + +/* + * handle_signal(...) handles interrupt signal to trigger cleanups + */ + +volatile int interrupted = 0; + +/* + * program_type distinguishes the [s]rtp sender and receiver cases + */ + +typedef enum { sender, receiver, unknown } program_type; + +int main(int argc, char *argv[]) +{ + char *dictfile = DICT_FILE; + FILE *dict; + char word[MAX_WORD_LEN]; + int sock, ret; + struct in_addr rcvr_addr; + struct sockaddr_in name; + struct ip_mreq mreq; +#if BEW + struct sockaddr_in local; +#endif + program_type prog_type = unknown; + srtp_sec_serv_t sec_servs = sec_serv_none; + unsigned char ttl = 5; + int c; + int key_size = 128; + int tag_size = 8; + int gcm_on = 0; + char *input_key = NULL; + int b64_input = 0; + char *address = NULL; + char key[MAX_KEY_LEN]; + unsigned short port = 0; + rtp_sender_t snd; + srtp_policy_t policy; + srtp_err_status_t status; + int len; + int expected_len; + int do_list_mods = 0; + uint32_t ssrc = 0xdeadbeef; /* ssrc value hardcoded for now */ +#ifdef RTPW_USE_WINSOCK2 + WORD wVersionRequested = MAKEWORD(2, 0); + WSADATA wsaData; + + ret = WSAStartup(wVersionRequested, &wsaData); + if (ret != 0) { + fprintf(stderr, "error: WSAStartup() failed: %d\n", ret); + exit(1); + } +#endif + + memset(&policy, 0x0, sizeof(srtp_policy_t)); + + printf("Using %s [0x%x]\n", srtp_get_version_string(), srtp_get_version()); + + if (setup_signal_handler(argv[0]) != 0) { + exit(1); + } + + /* initialize srtp library */ + status = srtp_init(); + if (status) { + printf("error: srtp initialization failed with error code %d\n", + status); + exit(1); + } + + /* check args */ + while (1) { + c = getopt_s(argc, argv, "b:k:rsgt:ae:ld:w:"); + if (c == -1) { + break; + } + switch (c) { + case 'b': + b64_input = 1; + /* fall thru */ + case 'k': + input_key = optarg_s; + break; + case 'e': + key_size = atoi(optarg_s); + if (key_size != 128 && key_size != 256) { + printf("error: encryption key size must be 128 or 256 (%d)\n", + key_size); + exit(1); + } + sec_servs |= sec_serv_conf; + break; + case 't': + tag_size = atoi(optarg_s); + if (tag_size != 8 && tag_size != 16) { + printf("error: GCM tag size must be 8 or 16 (%d)\n", tag_size); + exit(1); + } + break; + case 'a': + sec_servs |= sec_serv_auth; + break; + case 'g': + gcm_on = 1; + sec_servs |= sec_serv_auth; + break; + case 'r': + prog_type = receiver; + break; + case 's': + prog_type = sender; + break; + case 'd': + status = srtp_set_debug_module(optarg_s, 1); + if (status) { + printf("error: set debug module (%s) failed\n", optarg_s); + exit(1); + } + break; + case 'l': + do_list_mods = 1; + break; + case 'w': + dictfile = optarg_s; + break; + default: + usage(argv[0]); + } + } + + if (prog_type == unknown) { + if (do_list_mods) { + status = srtp_list_debug_modules(); + if (status) { + printf("error: list of debug modules failed\n"); + exit(1); + } + return 0; + } else { + printf("error: neither sender [-s] nor receiver [-r] specified\n"); + usage(argv[0]); + } + } + + if ((sec_servs && !input_key) || (!sec_servs && input_key)) { + /* + * a key must be provided if and only if security services have + * been requested + */ + usage(argv[0]); + } + + if (argc != optind_s + 2) { + /* wrong number of arguments */ + usage(argv[0]); + } + + /* get address from arg */ + address = argv[optind_s++]; + + /* get port from arg */ + port = atoi(argv[optind_s++]); + +/* set address */ +#ifdef HAVE_INET_ATON + if (0 == inet_aton(address, &rcvr_addr)) { + fprintf(stderr, "%s: cannot parse IP v4 address %s\n", argv[0], + address); + exit(1); + } + if (rcvr_addr.s_addr == INADDR_NONE) { + fprintf(stderr, "%s: address error", argv[0]); + exit(1); + } +#else + rcvr_addr.s_addr = inet_addr(address); + if (0xffffffff == rcvr_addr.s_addr) { + fprintf(stderr, "%s: cannot parse IP v4 address %s\n", argv[0], + address); + exit(1); + } +#endif + + /* open socket */ + sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP); + if (sock < 0) { + int err; +#ifdef RTPW_USE_WINSOCK2 + err = WSAGetLastError(); +#else + err = errno; +#endif + fprintf(stderr, "%s: couldn't open socket: %d\n", argv[0], err); + exit(1); + } + + memset(&name, 0, sizeof(struct sockaddr_in)); + name.sin_addr = rcvr_addr; + name.sin_family = PF_INET; + name.sin_port = htons(port); + + if (ADDR_IS_MULTICAST(rcvr_addr.s_addr)) { + if (prog_type == sender) { + ret = setsockopt(sock, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, + sizeof(ttl)); + if (ret < 0) { + fprintf(stderr, "%s: Failed to set TTL for multicast group", + argv[0]); + perror(""); + exit(1); + } + } + + mreq.imr_multiaddr.s_addr = rcvr_addr.s_addr; + mreq.imr_interface.s_addr = htonl(INADDR_ANY); + ret = setsockopt(sock, IPPROTO_IP, IP_ADD_MEMBERSHIP, (void *)&mreq, + sizeof(mreq)); + if (ret < 0) { + fprintf(stderr, "%s: Failed to join multicast group", argv[0]); + perror(""); + exit(1); + } + } + + /* report security services selected on the command line */ + printf("security services: "); + if (sec_servs & sec_serv_conf) + printf("confidentiality "); + if (sec_servs & sec_serv_auth) + printf("message authentication"); + if (sec_servs == sec_serv_none) + printf("none"); + printf("\n"); + + /* set up the srtp policy and master key */ + if (sec_servs) { + /* + * create policy structure, using the default mechanisms but + * with only the security services requested on the command line, + * using the right SSRC value + */ + switch (sec_servs) { + case sec_serv_conf_and_auth: + if (gcm_on) { +#ifdef GCM + switch (key_size) { + case 128: + srtp_crypto_policy_set_aes_gcm_128_8_auth(&policy.rtp); + srtp_crypto_policy_set_aes_gcm_128_8_auth(&policy.rtcp); + break; + case 256: + srtp_crypto_policy_set_aes_gcm_256_8_auth(&policy.rtp); + srtp_crypto_policy_set_aes_gcm_256_8_auth(&policy.rtcp); + break; + } +#else + printf("error: GCM mode only supported when using the OpenSSL " + "or NSS crypto engine.\n"); + return 0; +#endif + } else { + switch (key_size) { + case 128: + srtp_crypto_policy_set_rtp_default(&policy.rtp); + srtp_crypto_policy_set_rtcp_default(&policy.rtcp); + break; + case 256: + srtp_crypto_policy_set_aes_cm_256_hmac_sha1_80(&policy.rtp); + srtp_crypto_policy_set_rtcp_default(&policy.rtcp); + break; + } + } + break; + case sec_serv_conf: + if (gcm_on) { + printf( + "error: GCM mode must always be used with auth enabled\n"); + return -1; + } else { + switch (key_size) { + case 128: + srtp_crypto_policy_set_aes_cm_128_null_auth(&policy.rtp); + srtp_crypto_policy_set_rtcp_default(&policy.rtcp); + break; + case 256: + srtp_crypto_policy_set_aes_cm_256_null_auth(&policy.rtp); + srtp_crypto_policy_set_rtcp_default(&policy.rtcp); + break; + } + } + break; + case sec_serv_auth: + if (gcm_on) { +#ifdef GCM + switch (key_size) { + case 128: + srtp_crypto_policy_set_aes_gcm_128_8_only_auth(&policy.rtp); + srtp_crypto_policy_set_aes_gcm_128_8_only_auth( + &policy.rtcp); + break; + case 256: + srtp_crypto_policy_set_aes_gcm_256_8_only_auth(&policy.rtp); + srtp_crypto_policy_set_aes_gcm_256_8_only_auth( + &policy.rtcp); + break; + } +#else + printf("error: GCM mode only supported when using the OpenSSL " + "crypto engine.\n"); + return 0; +#endif + } else { + srtp_crypto_policy_set_null_cipher_hmac_sha1_80(&policy.rtp); + srtp_crypto_policy_set_rtcp_default(&policy.rtcp); + } + break; + default: + printf("error: unknown security service requested\n"); + return -1; + } + policy.ssrc.type = ssrc_specific; + policy.ssrc.value = ssrc; + policy.key = (uint8_t *)key; + policy.next = NULL; + policy.window_size = 128; + policy.allow_repeat_tx = 0; + policy.rtp.sec_serv = sec_servs; + policy.rtcp.sec_serv = sec_serv_none; /* we don't do RTCP anyway */ + + if (gcm_on && tag_size != 8) { + policy.rtp.auth_tag_len = tag_size; + } + + /* + * read key from hexadecimal or base64 on command line into an octet + * string + */ + if (b64_input) { + int pad; + expected_len = (policy.rtp.cipher_key_len * 4) / 3; + len = base64_string_to_octet_string(key, &pad, input_key, + expected_len); + if (pad != 0) { + fprintf(stderr, "error: padding in base64 unexpected\n"); + exit(1); + } + } else { + expected_len = policy.rtp.cipher_key_len * 2; + len = hex_string_to_octet_string(key, input_key, expected_len); + } + /* check that hex string is the right length */ + if (len < expected_len) { + fprintf(stderr, "error: too few digits in key/salt " + "(should be %d digits, found %d)\n", + expected_len, len); + exit(1); + } + if ((int)strlen(input_key) > policy.rtp.cipher_key_len * 2) { + fprintf(stderr, "error: too many digits in key/salt " + "(should be %d hexadecimal digits, found %u)\n", + policy.rtp.cipher_key_len * 2, (unsigned)strlen(input_key)); + exit(1); + } + + printf("set master key/salt to %s/", octet_string_hex_string(key, 16)); + printf("%s\n", octet_string_hex_string(key + 16, 14)); + + } else { + /* + * we're not providing security services, so set the policy to the + * null policy + * + * Note that this policy does not conform to the SRTP + * specification, since RTCP authentication is required. However, + * the effect of this policy is to turn off SRTP, so that this + * application is now a vanilla-flavored RTP application. + */ + srtp_crypto_policy_set_null_cipher_hmac_null(&policy.rtp); + srtp_crypto_policy_set_null_cipher_hmac_null(&policy.rtcp); + policy.key = (uint8_t *)key; + policy.ssrc.type = ssrc_specific; + policy.ssrc.value = ssrc; + policy.window_size = 0; + policy.allow_repeat_tx = 0; + policy.next = NULL; + } + + if (prog_type == sender) { +#if BEW + /* bind to local socket (to match crypto policy, if need be) */ + memset(&local, 0, sizeof(struct sockaddr_in)); + local.sin_addr.s_addr = htonl(INADDR_ANY); + local.sin_port = htons(port); + ret = bind(sock, (struct sockaddr *)&local, sizeof(struct sockaddr_in)); + if (ret < 0) { + fprintf(stderr, "%s: bind failed\n", argv[0]); + perror(""); + exit(1); + } +#endif /* BEW */ + + /* initialize sender's rtp and srtp contexts */ + snd = rtp_sender_alloc(); + if (snd == NULL) { + fprintf(stderr, "error: malloc() failed\n"); + exit(1); + } + rtp_sender_init(snd, sock, name, ssrc); + status = rtp_sender_init_srtp(snd, &policy); + if (status) { + fprintf(stderr, "error: srtp_create() failed with code %d\n", + status); + exit(1); + } + + /* open dictionary */ + dict = fopen(dictfile, "r"); + if (dict == NULL) { + fprintf(stderr, "%s: couldn't open file %s\n", argv[0], dictfile); + if (ADDR_IS_MULTICAST(rcvr_addr.s_addr)) { + leave_group(sock, mreq, argv[0]); + } + exit(1); + } + + /* read words from dictionary, then send them off */ + while (!interrupted && fgets(word, MAX_WORD_LEN, dict) != NULL) { + len = strlen(word) + 1; /* plus one for null */ + + if (len > MAX_WORD_LEN) + printf("error: word %s too large to send\n", word); + else { + rtp_sendto(snd, word, len); + printf("sending word: %s", word); + } + usleep(USEC_RATE); + } + + rtp_sender_deinit_srtp(snd); + rtp_sender_dealloc(snd); + + fclose(dict); + } else { /* prog_type == receiver */ + rtp_receiver_t rcvr; + + if (bind(sock, (struct sockaddr *)&name, sizeof(name)) < 0) { + close(sock); + fprintf(stderr, "%s: socket bind error\n", argv[0]); + perror(NULL); + if (ADDR_IS_MULTICAST(rcvr_addr.s_addr)) { + leave_group(sock, mreq, argv[0]); + } + exit(1); + } + + rcvr = rtp_receiver_alloc(); + if (rcvr == NULL) { + fprintf(stderr, "error: malloc() failed\n"); + exit(1); + } + rtp_receiver_init(rcvr, sock, name, ssrc); + status = rtp_receiver_init_srtp(rcvr, &policy); + if (status) { + fprintf(stderr, "error: srtp_create() failed with code %d\n", + status); + exit(1); + } + + /* get next word and loop */ + while (!interrupted) { + len = MAX_WORD_LEN; + if (rtp_recvfrom(rcvr, word, &len) > -1) + printf("\tword: %s\n", word); + } + + rtp_receiver_deinit_srtp(rcvr); + rtp_receiver_dealloc(rcvr); + } + + if (ADDR_IS_MULTICAST(rcvr_addr.s_addr)) { + leave_group(sock, mreq, argv[0]); + } + +#ifdef RTPW_USE_WINSOCK2 + ret = closesocket(sock); +#else + ret = close(sock); +#endif + if (ret < 0) { + fprintf(stderr, "%s: Failed to close socket", argv[0]); + perror(""); + } + + status = srtp_shutdown(); + if (status) { + printf("error: srtp shutdown failed with error code %d\n", status); + exit(1); + } + +#ifdef RTPW_USE_WINSOCK2 + WSACleanup(); +#endif + + return 0; +} + +void usage(char *string) +{ + printf("usage: %s [-d <debug>]* [-k <key> [-a][-e]] " + "[-s | -r] dest_ip dest_port\n" + "or %s -l\n" + "where -a use message authentication\n" + " -e <key size> use encryption (use 128 or 256 for key size)\n" + " -g Use AES-GCM mode (must be used with -e)\n" + " -t <tag size> Tag size to use in GCM mode (use 8 or 16)\n" + " -k <key> sets the srtp master key given in hexadecimal\n" + " -b <key> sets the srtp master key given in base64\n" + " -s act as rtp sender\n" + " -r act as rtp receiver\n" + " -l list debug modules\n" + " -d <debug> turn on debugging for module <debug>\n" + " -w <wordsfile> use <wordsfile> for input, rather than %s\n", + string, string, DICT_FILE); + exit(1); +} + +void leave_group(int sock, struct ip_mreq mreq, char *name) +{ + int ret; + + ret = setsockopt(sock, IPPROTO_IP, IP_DROP_MEMBERSHIP, (void *)&mreq, + sizeof(mreq)); + if (ret < 0) { + fprintf(stderr, "%s: Failed to leave multicast group", name); + perror(""); + } +} + +void handle_signal(int signum) +{ + interrupted = 1; + /* Reset handler explicitly, in case we don't have sigaction() (and signal() + has BSD semantics), or we don't have SA_RESETHAND */ + signal(signum, SIG_DFL); +} + +int setup_signal_handler(char *name) +{ +#ifdef HAVE_SIGACTION + struct sigaction act; + memset(&act, 0, sizeof(act)); + + act.sa_handler = handle_signal; + sigemptyset(&act.sa_mask); +#if defined(SA_RESETHAND) + act.sa_flags = SA_RESETHAND; +#else + act.sa_flags = 0; +#endif + /* Note that we're not setting SA_RESTART; we want recvfrom to return + * EINTR when we signal the receiver. */ + + if (sigaction(SIGTERM, &act, NULL) != 0) { + fprintf(stderr, "%s: error setting up signal handler", name); + perror(""); + return -1; + } +#else + if (signal(SIGTERM, handle_signal) == SIG_ERR) { + fprintf(stderr, "%s: error setting up signal handler", name); + perror(""); + return -1; + } +#endif + return 0; +} diff --git a/third_party/libsrtp/src/test/rtpw_test.sh b/third_party/libsrtp/src/test/rtpw_test.sh new file mode 100755 index 0000000000..8fcb35f363 --- /dev/null +++ b/third_party/libsrtp/src/test/rtpw_test.sh @@ -0,0 +1,183 @@ +#!/bin/sh +# +# usage: rtpw_test <rtpw_commands> +# +# tests the rtpw sender and receiver functions +# +# Copyright (c) 2001-2017, Cisco Systems, Inc. +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions +# are met: +# +# Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# +# Redistributions in binary form must reproduce the above +# copyright notice, this list of conditions and the following +# disclaimer in the documentation and/or other materials provided +# with the distribution. +# +# Neither the name of the Cisco Systems, Inc. nor the names of its +# contributors may be used to endorse or promote products derived +# from this software without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS +# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE +# COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, +# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR +# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, +# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED +# OF THE POSSIBILITY OF SUCH DAMAGE. +# + +case $(uname -s) in + *CYGWIN*|*MINGW*) + EXE=".exe" + ;; + *Linux*) + EXE="" + if [ -n "$CRYPTO_LIBDIR" ] + then + export LD_LIBRARY_PATH="$CRYPTO_LIBDIR" + fi + ;; + *Darwin*) + EXE="" + if [ -n "$CRYPTO_LIBDIR" ] + then + export DYLD_LIBRARY_PATH="$CRYPTO_LIBDIR" + fi + ;; +esac + +RTPW=./rtpw$EXE +[ -n "$MESON_EXE_WRAPPER" ] && RTPW="$MESON_EXE_WRAPPER $RTPW" +DEST_PORT=9999 +DURATION=3 + +key=Ky7cUDT2GnI0XKWYbXv9AYmqbcLsqzL9mvdN9t/G + +ARGS="-b $key -a -e 128" + +# First, we run "killall" to get rid of all existing rtpw processes. +# This step also enables this script to clean up after itself; if this +# script is interrupted after the rtpw processes are started but before +# they are killed, those processes will linger. Re-running the script +# will get rid of them. + +killall rtpw 2>/dev/null + +if test -n $MESON_EXE_WRAPPER || test -x $RTPW; then + +echo $0 ": starting rtpw receiver process... " + +$RTPW $* $ARGS -r 0.0.0.0 $DEST_PORT & + +receiver_pid=$! + +echo $0 ": receiver PID = $receiver_pid" + +sleep 1 + +# verify that the background job is running +ps -e | grep -q $receiver_pid +retval=$? +echo $retval +if [ $retval != 0 ]; then + echo $0 ": error" + exit 254 +fi + +echo $0 ": starting rtpw sender process..." + +$RTPW $* $ARGS -s 127.0.0.1 $DEST_PORT & + +sender_pid=$! + +echo $0 ": sender PID = $sender_pid" + +# verify that the background job is running +ps -e | grep -q $sender_pid +retval=$? +echo $retval +if [ $retval != 0 ]; then + echo $0 ": error" + exit 255 +fi + +sleep $DURATION + +kill $receiver_pid +kill $sender_pid + +wait $receiver_pid 2>/dev/null +wait $sender_pid 2>/dev/null + + +key=033490ba9e82994fc21013395739038992b2edc5034f61a72345ca598d7bfd0189aa6dc2ecab32fd9af74df6dfc6 + +ARGS="-k $key -a -e 256" + +echo $0 ": starting rtpw receiver process... " + +$RTPW $* $ARGS -r 0.0.0.0 $DEST_PORT & + +receiver_pid=$! + +echo $0 ": receiver PID = $receiver_pid" + +sleep 1 + +# verify that the background job is running +ps -e | grep -q $receiver_pid +retval=$? +echo $retval +if [ $retval != 0 ]; then + echo $0 ": error" + exit 254 +fi + +echo $0 ": starting rtpw sender process..." + +$RTPW $* $ARGS -s 127.0.0.1 $DEST_PORT & + +sender_pid=$! + +echo $0 ": sender PID = $sender_pid" + +# verify that the background job is running +ps -e | grep -q $sender_pid +retval=$? +echo $retval +if [ $retval != 0 ]; then + echo $0 ": error" + exit 255 +fi + +sleep $DURATION + +kill $receiver_pid +kill $sender_pid + +wait $receiver_pid 2>/dev/null +wait $sender_pid 2>/dev/null + +echo $0 ": done (test passed)" + +else + +echo "error: can't find executable" $RTPW +exit 1 + +fi + +# EOF + + diff --git a/third_party/libsrtp/src/test/rtpw_test_gcm.sh b/third_party/libsrtp/src/test/rtpw_test_gcm.sh new file mode 100755 index 0000000000..1722f44ea7 --- /dev/null +++ b/third_party/libsrtp/src/test/rtpw_test_gcm.sh @@ -0,0 +1,267 @@ +#!/bin/sh +# +# usage: rtpw_test <rtpw_commands> +# +# tests the rtpw sender and receiver functions +# +# Copyright (c) 2001-2017, Cisco Systems, Inc. +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions +# are met: +# +# Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# +# Redistributions in binary form must reproduce the above +# copyright notice, this list of conditions and the following +# disclaimer in the documentation and/or other materials provided +# with the distribution. +# +# Neither the name of the Cisco Systems, Inc. nor the names of its +# contributors may be used to endorse or promote products derived +# from this software without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS +# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE +# COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, +# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR +# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, +# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED +# OF THE POSSIBILITY OF SUCH DAMAGE. +# + +case $(uname -s) in + *CYGWIN*|*MINGW*) + EXE=".exe" + ;; + *Linux*) + EXE="" + if [ -n "$CRYPTO_LIBDIR" ] + then + export LD_LIBRARY_PATH="$CRYPTO_LIBDIR" + fi + ;; + *Darwin*) + EXE="" + if [ -n "$CRYPTO_LIBDIR" ] + then + export DYLD_LIBRARY_PATH="$CRYPTO_LIBDIR" + fi + ;; +esac + +RTPW=./rtpw$EXE +[ -n "$MESON_EXE_WRAPPER" ] && RTPW="$MESON_EXE_WRAPPER $RTPW" +DEST_PORT=9999 +DURATION=3 + +# First, we run "killall" to get rid of all existing rtpw processes. +# This step also enables this script to clean up after itself; if this +# script is interrupted after the rtpw processes are started but before +# they are killed, those processes will linger. Re-running the script +# will get rid of them. + +killall rtpw 2>/dev/null + +if test -n $MESON_EXE_WRAPPER || test -x $RTPW; then + +GCMARGS128="-k 01234567890123456789012345678901234567890123456789012345 -g -e 128" +echo $0 ": starting GCM mode 128-bit rtpw receiver process... " + +exec $RTPW $* $GCMARGS128 -r 127.0.0.1 $DEST_PORT & + +receiver_pid=$! + +echo $0 ": receiver PID = $receiver_pid" + +sleep 1 + +# verify that the background job is running +ps -e | grep -q $receiver_pid +retval=$? +echo $retval +if [ $retval != 0 ]; then + echo $0 ": error" + exit 254 +fi + +echo $0 ": starting GCM 128-bit rtpw sender process..." + +exec $RTPW $* $GCMARGS128 -s 127.0.0.1 $DEST_PORT & + +sender_pid=$! + +echo $0 ": sender PID = $sender_pid" + +# verify that the background job is running +ps -e | grep -q $sender_pid +retval=$? +echo $retval +if [ $retval != 0 ]; then + echo $0 ": error" + exit 255 +fi + +sleep $DURATION + +kill $receiver_pid +kill $sender_pid + +wait $receiver_pid 2>/dev/null +wait $sender_pid 2>/dev/null + +GCMARGS128="-k 01234567890123456789012345678901234567890123456789012345 -g -t 16 -e 128" +echo $0 ": starting GCM mode 128-bit (16 byte tag) rtpw receiver process... " + +exec $RTPW $* $GCMARGS128 -r 127.0.0.1 $DEST_PORT & + +receiver_pid=$! + +echo $0 ": receiver PID = $receiver_pid" + +sleep 1 + +# verify that the background job is running +ps -e | grep -q $receiver_pid +retval=$? +echo $retval +if [ $retval != 0 ]; then + echo $0 ": error" + exit 254 +fi + +echo $0 ": starting GCM 128-bit (16 byte tag) rtpw sender process..." + +exec $RTPW $* $GCMARGS128 -s 127.0.0.1 $DEST_PORT & + +sender_pid=$! + +echo $0 ": sender PID = $sender_pid" + +# verify that the background job is running +ps -e | grep -q $sender_pid +retval=$? +echo $retval +if [ $retval != 0 ]; then + echo $0 ": error" + exit 255 +fi + +sleep $DURATION + +kill $receiver_pid +kill $sender_pid + +wait $receiver_pid 2>/dev/null +wait $sender_pid 2>/dev/null + + +GCMARGS256="-k 0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567 -g -e 256" +echo $0 ": starting GCM mode 256-bit rtpw receiver process... " + +exec $RTPW $* $GCMARGS256 -r 127.0.0.1 $DEST_PORT & + +receiver_pid=$! + +echo $0 ": receiver PID = $receiver_pid" + +sleep 1 + +# verify that the background job is running +ps -e | grep -q $receiver_pid +retval=$? +echo $retval +if [ $retval != 0 ]; then + echo $0 ": error" + exit 254 +fi + +echo $0 ": starting GCM 256-bit rtpw sender process..." + +exec $RTPW $* $GCMARGS256 -s 127.0.0.1 $DEST_PORT & + +sender_pid=$! + +echo $0 ": sender PID = $sender_pid" + +# verify that the background job is running +ps -e | grep -q $sender_pid +retval=$? +echo $retval +if [ $retval != 0 ]; then + echo $0 ": error" + exit 255 +fi + +sleep $DURATION + +kill $receiver_pid +kill $sender_pid + +wait $receiver_pid 2>/dev/null +wait $sender_pid 2>/dev/null + +GCMARGS256="-k a123456789012345678901234567890123456789012345678901234567890123456789012345678901234567 -g -t 16 -e 256" +echo $0 ": starting GCM mode 256-bit (16 byte tag) rtpw receiver process... " + +exec $RTPW $* $GCMARGS256 -r 127.0.0.1 $DEST_PORT & + +receiver_pid=$! + +echo $0 ": receiver PID = $receiver_pid" + +sleep 1 + +# verify that the background job is running +ps -e | grep -q $receiver_pid +retval=$? +echo $retval +if [ $retval != 0 ]; then + echo $0 ": error" + exit 254 +fi + +echo $0 ": starting GCM 256-bit (16 byte tag) rtpw sender process..." + +exec $RTPW $* $GCMARGS256 -s 127.0.0.1 $DEST_PORT & + +sender_pid=$! + +echo $0 ": sender PID = $sender_pid" + +# verify that the background job is running +ps -e | grep -q $sender_pid +retval=$? +echo $retval +if [ $retval != 0 ]; then + echo $0 ": error" + exit 255 +fi + +sleep $DURATION + +kill $receiver_pid +kill $sender_pid + +wait $receiver_pid 2>/dev/null +wait $sender_pid 2>/dev/null + +echo $0 ": done (test passed)" + +else + +echo "error: can't find executable" $RTPW +exit 1 + +fi + +# EOF + + diff --git a/third_party/libsrtp/src/test/srtp_driver.c b/third_party/libsrtp/src/test/srtp_driver.c new file mode 100644 index 0000000000..a31f3346ab --- /dev/null +++ b/third_party/libsrtp/src/test/srtp_driver.c @@ -0,0 +1,4014 @@ +/* + * srtp_driver.c + * + * a test driver for libSRTP + * + * David A. McGrew + * Cisco Systems, Inc. + */ +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#include <string.h> /* for memcpy() */ +#include <time.h> /* for clock() */ +#include <stdlib.h> /* for malloc(), free() */ +#include <stdio.h> /* for print(), fflush() */ +#include "getopt_s.h" /* for local getopt() */ + +#include "srtp_priv.h" +#include "util.h" + +#ifdef HAVE_NETINET_IN_H +#include <netinet/in.h> +#elif defined HAVE_WINSOCK2_H +#include <winsock2.h> +#endif + +#define PRINT_REFERENCE_PACKET 1 + +srtp_err_status_t srtp_validate(void); + +srtp_err_status_t srtp_validate_null(void); + +#ifdef GCM +srtp_err_status_t srtp_validate_gcm(void); +#endif + +srtp_err_status_t srtp_validate_encrypted_extensions_headers(void); + +#ifdef GCM +srtp_err_status_t srtp_validate_encrypted_extensions_headers_gcm(void); +#endif + +srtp_err_status_t srtp_validate_aes_256(void); + +srtp_err_status_t srtp_create_big_policy(srtp_policy_t **list); + +srtp_err_status_t srtp_dealloc_big_policy(srtp_policy_t *list); + +srtp_err_status_t srtp_test_empty_payload(void); + +#ifdef GCM +srtp_err_status_t srtp_test_empty_payload_gcm(void); +#endif + +srtp_err_status_t srtp_test_remove_stream(void); + +srtp_err_status_t srtp_test_update(void); + +srtp_err_status_t srtp_test_protect_trailer_length(void); + +srtp_err_status_t srtp_test_protect_rtcp_trailer_length(void); + +srtp_err_status_t srtp_test_get_roc(void); + +srtp_err_status_t srtp_test_set_receiver_roc(void); + +srtp_err_status_t srtp_test_set_sender_roc(void); + +double srtp_bits_per_second(int msg_len_octets, const srtp_policy_t *policy); + +double srtp_rejections_per_second(int msg_len_octets, + const srtp_policy_t *policy); + +void srtp_do_timing(const srtp_policy_t *policy); + +void srtp_do_rejection_timing(const srtp_policy_t *policy); + +srtp_err_status_t srtp_test(const srtp_policy_t *policy, + int extension_header, + int mki_index); + +srtp_err_status_t srtcp_test(const srtp_policy_t *policy, int mki_index); + +srtp_err_status_t srtp_session_print_policy(srtp_t srtp); + +srtp_err_status_t srtp_print_policy(const srtp_policy_t *policy); + +char *srtp_packet_to_string(srtp_hdr_t *hdr, int packet_len); + +double mips_estimate(int num_trials, int *ignore); + +#define TEST_MKI_ID_SIZE 4 + +extern uint8_t test_key[46]; +extern uint8_t test_key_2[46]; +extern uint8_t test_mki_id[TEST_MKI_ID_SIZE]; +extern uint8_t test_mki_id_2[TEST_MKI_ID_SIZE]; + +// clang-format off +srtp_master_key_t master_key_1 = { + test_key, + test_mki_id, + TEST_MKI_ID_SIZE +}; + +srtp_master_key_t master_key_2 = { + test_key_2, + test_mki_id_2, + TEST_MKI_ID_SIZE +}; + +srtp_master_key_t *test_keys[2] = { + &master_key_1, + &master_key_2 +}; +// clang-format on + +void usage(char *prog_name) +{ + printf("usage: %s [ -t ][ -c ][ -v ][ -o ][-d <debug_module> ]* [ -l ]\n" + " -t run timing test\n" + " -r run rejection timing test\n" + " -c run codec timing test\n" + " -v run validation tests\n" + " -o output logging to stdout\n" + " -d <mod> turn on debugging module <mod>\n" + " -l list debugging modules\n", + prog_name); + exit(1); +} + +void log_handler(srtp_log_level_t level, const char *msg, void *data) +{ + char level_char = '?'; + switch (level) { + case srtp_log_level_error: + level_char = 'e'; + break; + case srtp_log_level_warning: + level_char = 'w'; + break; + case srtp_log_level_info: + level_char = 'i'; + break; + case srtp_log_level_debug: + level_char = 'd'; + break; + } + printf("SRTP-LOG [%c]: %s\n", level_char, msg); +} + +/* + * The policy_array and invalid_policy_array are null-terminated arrays of + * policy structs. They is declared at the end of this file. + */ + +extern const srtp_policy_t *policy_array[]; +extern const srtp_policy_t *invalid_policy_array[]; + +/* the wildcard_policy is declared below; it has a wildcard ssrc */ + +extern const srtp_policy_t wildcard_policy; + +/* + * mod_driver debug module - debugging module for this test driver + * + * we use the crypto_kernel debugging system in this driver, which + * makes the interface uniform and increases portability + */ + +srtp_debug_module_t mod_driver = { + 0, /* debugging is off by default */ + "driver" /* printable name for module */ +}; + +int main(int argc, char *argv[]) +{ + int q; + unsigned do_timing_test = 0; + unsigned do_rejection_test = 0; + unsigned do_codec_timing = 0; + unsigned do_validation = 0; + unsigned do_list_mods = 0; + unsigned do_log_stdout = 0; + srtp_err_status_t status; + + /* + * verify that the compiler has interpreted the header data + * structure srtp_hdr_t correctly + */ + if (sizeof(srtp_hdr_t) != 12) { + printf("error: srtp_hdr_t has incorrect size" + "(size is %ld bytes, expected 12)\n", + (long)sizeof(srtp_hdr_t)); + exit(1); + } + + /* initialize srtp library */ + status = srtp_init(); + if (status) { + printf("error: srtp init failed with error code %d\n", status); + exit(1); + } + + /* load srtp_driver debug module */ + status = srtp_crypto_kernel_load_debug_module(&mod_driver); + if (status) { + printf("error: load of srtp_driver debug module failed " + "with error code %d\n", + status); + exit(1); + } + + /* process input arguments */ + while (1) { + q = getopt_s(argc, argv, "trcvold:"); + if (q == -1) { + break; + } + switch (q) { + case 't': + do_timing_test = 1; + break; + case 'r': + do_rejection_test = 1; + break; + case 'c': + do_codec_timing = 1; + break; + case 'v': + do_validation = 1; + break; + case 'o': + do_log_stdout = 1; + break; + case 'l': + do_list_mods = 1; + break; + case 'd': + status = srtp_set_debug_module(optarg_s, 1); + if (status) { + printf("error: set debug module (%s) failed\n", optarg_s); + exit(1); + } + break; + default: + usage(argv[0]); + } + } + + if (!do_validation && !do_timing_test && !do_codec_timing && + !do_list_mods && !do_rejection_test) { + usage(argv[0]); + } + + if (do_log_stdout) { + status = srtp_install_log_handler(log_handler, NULL); + if (status) { + printf("error: install log handler failed\n"); + exit(1); + } + } + + if (do_list_mods) { + status = srtp_list_debug_modules(); + if (status) { + printf("error: list of debug modules failed\n"); + exit(1); + } + } + + if (do_validation) { + const srtp_policy_t **policy = policy_array; + srtp_policy_t *big_policy; + srtp_t srtp_sender; + + /* loop over policy array, testing srtp and srtcp for each policy */ + while (*policy != NULL) { + printf("testing srtp_protect and srtp_unprotect\n"); + if (srtp_test(*policy, 0, -1) == srtp_err_status_ok) { + printf("passed\n\n"); + } else { + printf("failed\n"); + exit(1); + } + + printf("testing srtp_protect and srtp_unprotect with encrypted " + "extensions headers\n"); + if (srtp_test(*policy, 1, -1) == srtp_err_status_ok) { + printf("passed\n\n"); + } else { + printf("failed\n"); + exit(1); + } + printf("testing srtp_protect_rtcp and srtp_unprotect_rtcp\n"); + if (srtcp_test(*policy, -1) == srtp_err_status_ok) { + printf("passed\n\n"); + } else { + printf("failed\n"); + exit(1); + } + printf("testing srtp_protect_rtp and srtp_unprotect_rtp with MKI " + "index set to 0\n"); + if (srtp_test(*policy, 0, 0) == srtp_err_status_ok) { + printf("passed\n\n"); + } else { + printf("failed\n"); + exit(1); + } + printf("testing srtp_protect_rtp and srtp_unprotect_rtp with MKI " + "index set to 1\n"); + if (srtp_test(*policy, 0, 1) == srtp_err_status_ok) { + printf("passed\n\n"); + } else { + printf("failed\n"); + exit(1); + } + + printf("testing srtp_protect_rtcp and srtp_unprotect_rtcp with MKI " + "index set to 0\n"); + if (srtcp_test(*policy, 0) == srtp_err_status_ok) { + printf("passed\n\n"); + } else { + printf("failed\n"); + exit(1); + } + printf("testing srtp_protect_rtcp and srtp_unprotect_rtcp with MKI " + "index set to 1\n"); + if (srtcp_test(*policy, 1) == srtp_err_status_ok) { + printf("passed\n\n"); + } else { + printf("failed\n"); + exit(1); + } + policy++; + } + + /* loop over invalid policy array, testing that an SRTP context cannot + * be created with the policy */ + policy = invalid_policy_array; + while (*policy != NULL) { + printf("testing srtp_create fails with invalid policy\n"); + if (srtp_create(&srtp_sender, *policy) != srtp_err_status_ok) { + printf("passed\n\n"); + } else { + printf("failed\n"); + exit(1); + } + + policy++; + } + + /* create a big policy list and run tests on it */ + status = srtp_create_big_policy(&big_policy); + if (status) { + printf("unexpected failure with error code %d\n", status); + exit(1); + } + printf("testing srtp_protect and srtp_unprotect with big policy\n"); + if (srtp_test(big_policy, 0, -1) == srtp_err_status_ok) { + printf("passed\n\n"); + } else { + printf("failed\n"); + exit(1); + } + printf("testing srtp_protect and srtp_unprotect with big policy and " + "encrypted extensions headers\n"); + if (srtp_test(big_policy, 1, -1) == srtp_err_status_ok) { + printf("passed\n\n"); + } else { + printf("failed\n"); + exit(1); + } + status = srtp_dealloc_big_policy(big_policy); + if (status) { + printf("unexpected failure with error code %d\n", status); + exit(1); + } + + /* run test on wildcard policy */ + printf("testing srtp_protect and srtp_unprotect on " + "wildcard ssrc policy\n"); + if (srtp_test(&wildcard_policy, 0, -1) == srtp_err_status_ok) { + printf("passed\n\n"); + } else { + printf("failed\n"); + exit(1); + } + printf("testing srtp_protect and srtp_unprotect on " + "wildcard ssrc policy and encrypted extensions headers\n"); + if (srtp_test(&wildcard_policy, 1, -1) == srtp_err_status_ok) { + printf("passed\n\n"); + } else { + printf("failed\n"); + exit(1); + } + + /* + * run validation test against the reference packets - note + * that this test only covers the default policy + */ + printf("testing srtp_protect and srtp_unprotect against " + "reference packet\n"); + if (srtp_validate() == srtp_err_status_ok) { + printf("passed\n\n"); + } else { + printf("failed\n"); + exit(1); + } + + printf("testing srtp_protect and srtp_unprotect against " + "reference packet using null cipher and HMAC\n"); + if (srtp_validate_null() == srtp_err_status_ok) { + printf("passed\n\n"); + } else { + printf("failed\n"); + exit(1); + } + +#ifdef GCM + printf("testing srtp_protect and srtp_unprotect against " + "reference packet using GCM\n"); + if (srtp_validate_gcm() == srtp_err_status_ok) { + printf("passed\n\n"); + } else { + printf("failed\n"); + exit(1); + } +#endif + + printf("testing srtp_protect and srtp_unprotect against " + "reference packet with encrypted extensions headers\n"); + if (srtp_validate_encrypted_extensions_headers() == srtp_err_status_ok) + printf("passed\n\n"); + else { + printf("failed\n"); + exit(1); + } + +#ifdef GCM + printf("testing srtp_protect and srtp_unprotect against " + "reference packet with encrypted extension headers (GCM)\n"); + if (srtp_validate_encrypted_extensions_headers_gcm() == + srtp_err_status_ok) { + printf("passed\n\n"); + } else { + printf("failed\n"); + exit(1); + } +#endif + + /* + * run validation test against the reference packets for + * AES-256 + */ + printf("testing srtp_protect and srtp_unprotect against " + "reference packet (AES-256)\n"); + if (srtp_validate_aes_256() == srtp_err_status_ok) { + printf("passed\n\n"); + } else { + printf("failed\n"); + exit(1); + } + + /* + * test packets with empty payload + */ + printf("testing srtp_protect and srtp_unprotect against " + "packet with empty payload\n"); + if (srtp_test_empty_payload() == srtp_err_status_ok) { + printf("passed\n"); + } else { + printf("failed\n"); + exit(1); + } +#ifdef GCM + printf("testing srtp_protect and srtp_unprotect against " + "packet with empty payload (GCM)\n"); + if (srtp_test_empty_payload_gcm() == srtp_err_status_ok) { + printf("passed\n"); + } else { + printf("failed\n"); + exit(1); + } +#endif + + /* + * test the function srtp_remove_stream() + */ + printf("testing srtp_remove_stream()..."); + if (srtp_test_remove_stream() == srtp_err_status_ok) { + printf("passed\n"); + } else { + printf("failed\n"); + exit(1); + } + + /* + * test the function srtp_update() + */ + printf("testing srtp_update()..."); + if (srtp_test_update() == srtp_err_status_ok) { + printf("passed\n"); + } else { + printf("failed\n"); + exit(1); + } + + /* + * test the functions srtp_get_protect_trailer_length + * and srtp_get_protect_rtcp_trailer_length + */ + printf("testing srtp_get_protect_trailer_length()..."); + if (srtp_test_protect_trailer_length() == srtp_err_status_ok) { + printf("passed\n"); + } else { + printf("failed\n"); + exit(1); + } + + printf("testing srtp_get_protect_rtcp_trailer_length()..."); + if (srtp_test_protect_rtcp_trailer_length() == srtp_err_status_ok) { + printf("passed\n"); + } else { + printf("failed\n"); + exit(1); + } + + printf("testing srtp_test_get_roc()..."); + if (srtp_test_get_roc() == srtp_err_status_ok) { + printf("passed\n"); + } else { + printf("failed\n"); + exit(1); + } + + printf("testing srtp_test_set_receiver_roc()..."); + if (srtp_test_set_receiver_roc() == srtp_err_status_ok) { + printf("passed\n"); + } else { + printf("failed\n"); + exit(1); + } + + printf("testing srtp_test_set_sender_roc()..."); + if (srtp_test_set_sender_roc() == srtp_err_status_ok) { + printf("passed\n"); + } else { + printf("failed\n"); + exit(1); + } + } + + if (do_timing_test) { + const srtp_policy_t **policy = policy_array; + + /* loop over policies, run timing test for each */ + while (*policy != NULL) { + srtp_print_policy(*policy); + srtp_do_timing(*policy); + policy++; + } + } + + if (do_rejection_test) { + const srtp_policy_t **policy = policy_array; + + /* loop over policies, run rejection timing test for each */ + while (*policy != NULL) { + srtp_print_policy(*policy); + srtp_do_rejection_timing(*policy); + policy++; + } + } + + if (do_codec_timing) { + srtp_policy_t policy; + int ignore; + double mips_value = mips_estimate(1000000000, &ignore); + + memset(&policy, 0, sizeof(policy)); + srtp_crypto_policy_set_rtp_default(&policy.rtp); + srtp_crypto_policy_set_rtcp_default(&policy.rtcp); + policy.ssrc.type = ssrc_specific; + policy.ssrc.value = 0xdecafbad; + policy.key = test_key; + policy.deprecated_ekt = NULL; + policy.window_size = 128; + policy.allow_repeat_tx = 0; + policy.next = NULL; + + printf("mips estimate: %e\n", mips_value); + + printf("testing srtp processing time for voice codecs:\n"); + printf("codec\t\tlength (octets)\t\tsrtp instructions/second\n"); + printf("G.711\t\t%d\t\t\t%e\n", 80, + (double)mips_value * (80 * 8) / + srtp_bits_per_second(80, &policy) / .01); + printf("G.711\t\t%d\t\t\t%e\n", 160, + (double)mips_value * (160 * 8) / + srtp_bits_per_second(160, &policy) / .02); + printf("G.726-32\t%d\t\t\t%e\n", 40, + (double)mips_value * (40 * 8) / + srtp_bits_per_second(40, &policy) / .01); + printf("G.726-32\t%d\t\t\t%e\n", 80, + (double)mips_value * (80 * 8) / + srtp_bits_per_second(80, &policy) / .02); + printf("G.729\t\t%d\t\t\t%e\n", 10, + (double)mips_value * (10 * 8) / + srtp_bits_per_second(10, &policy) / .01); + printf("G.729\t\t%d\t\t\t%e\n", 20, + (double)mips_value * (20 * 8) / + srtp_bits_per_second(20, &policy) / .02); + printf("Wideband\t%d\t\t\t%e\n", 320, + (double)mips_value * (320 * 8) / + srtp_bits_per_second(320, &policy) / .01); + printf("Wideband\t%d\t\t\t%e\n", 640, + (double)mips_value * (640 * 8) / + srtp_bits_per_second(640, &policy) / .02); + } + + status = srtp_shutdown(); + if (status) { + printf("error: srtp shutdown failed with error code %d\n", status); + exit(1); + } + + return 0; +} + +/* + * srtp_create_test_packet(len, ssrc) returns a pointer to a + * (malloced) example RTP packet whose data field has the length given + * by pkt_octet_len and the SSRC value ssrc. The total length of the + * packet is twelve octets longer, since the header is at the + * beginning. There is room at the end of the packet for a trailer, + * and the four octets following the packet are filled with 0xff + * values to enable testing for overwrites. + * + * note that the location of the test packet can (and should) be + * deallocated with the free() call once it is no longer needed. + */ + +srtp_hdr_t *srtp_create_test_packet(int pkt_octet_len, + uint32_t ssrc, + int *pkt_len) +{ + int i; + uint8_t *buffer; + srtp_hdr_t *hdr; + int bytes_in_hdr = 12; + + /* allocate memory for test packet */ + hdr = (srtp_hdr_t *)malloc(pkt_octet_len + bytes_in_hdr + + SRTP_MAX_TRAILER_LEN + 4); + if (!hdr) { + return NULL; + } + + hdr->version = 2; /* RTP version two */ + hdr->p = 0; /* no padding needed */ + hdr->x = 0; /* no header extension */ + hdr->cc = 0; /* no CSRCs */ + hdr->m = 0; /* marker bit */ + hdr->pt = 0xf; /* payload type */ + hdr->seq = htons(0x1234); /* sequence number */ + hdr->ts = htonl(0xdecafbad); /* timestamp */ + hdr->ssrc = htonl(ssrc); /* synch. source */ + + buffer = (uint8_t *)hdr; + buffer += bytes_in_hdr; + + /* set RTP data to 0xab */ + for (i = 0; i < pkt_octet_len; i++) { + *buffer++ = 0xab; + } + + /* set post-data value to 0xffff to enable overrun checking */ + for (i = 0; i < SRTP_MAX_TRAILER_LEN + 4; i++) { + *buffer++ = 0xff; + } + + *pkt_len = bytes_in_hdr + pkt_octet_len; + + return hdr; +} + +static srtp_hdr_t *srtp_create_test_packet_extended(int pkt_octet_len, + uint32_t ssrc, + uint16_t seq, + uint32_t ts, + int *pkt_len) +{ + srtp_hdr_t *hdr; + + hdr = srtp_create_test_packet(pkt_octet_len, ssrc, pkt_len); + if (hdr == NULL) + return hdr; + + hdr->seq = htons(seq); + hdr->ts = htonl(ts); + return hdr; +} + +srtp_hdr_t *srtp_create_test_packet_ext_hdr(int pkt_octet_len, + uint32_t ssrc, + int *pkt_len) +{ + int i; + uint8_t *buffer; + srtp_hdr_t *hdr; + int bytes_in_hdr = 12; + uint8_t extension_header[12] = { /* one-byte header */ + 0xbe, 0xde, + /* size */ + 0x00, 0x02, + /* id 1, length 1 (i.e. 2 bytes) */ + 0x11, + /* payload */ + 0xca, 0xfe, + /* padding */ + 0x00, + /* id 2, length 0 (i.e. 1 byte) */ + 0x20, + /* payload */ + 0xba, + /* padding */ + 0x00, 0x00 + }; + + /* allocate memory for test packet */ + hdr = (srtp_hdr_t *)malloc(pkt_octet_len + bytes_in_hdr + + sizeof(extension_header) + SRTP_MAX_TRAILER_LEN + + 4); + if (!hdr) + return NULL; + + hdr->version = 2; /* RTP version two */ + hdr->p = 0; /* no padding needed */ + hdr->x = 1; /* no header extension */ + hdr->cc = 0; /* no CSRCs */ + hdr->m = 0; /* marker bit */ + hdr->pt = 0xf; /* payload type */ + hdr->seq = htons(0x1234); /* sequence number */ + hdr->ts = htonl(0xdecafbad); /* timestamp */ + hdr->ssrc = htonl(ssrc); /* synch. source */ + + buffer = (uint8_t *)hdr; + buffer += bytes_in_hdr; + + memcpy(buffer, extension_header, sizeof(extension_header)); + buffer += sizeof(extension_header); + + /* set RTP data to 0xab */ + for (i = 0; i < pkt_octet_len; i++) + *buffer++ = 0xab; + + /* set post-data value to 0xffff to enable overrun checking */ + for (i = 0; i < SRTP_MAX_TRAILER_LEN + 4; i++) + *buffer++ = 0xff; + + *pkt_len = bytes_in_hdr + sizeof(extension_header) + pkt_octet_len; + + return hdr; +} + +void srtp_do_timing(const srtp_policy_t *policy) +{ + int len; + + /* + * note: the output of this function is formatted so that it + * can be used in gnuplot. '#' indicates a comment, and "\r\n" + * terminates a record + */ + + printf("# testing srtp throughput:\r\n"); + printf("# mesg length (octets)\tthroughput (megabits per second)\r\n"); + + for (len = 16; len <= 2048; len *= 2) { + printf("%d\t\t\t%f\r\n", len, + srtp_bits_per_second(len, policy) / 1.0E6); + } + + /* these extra linefeeds let gnuplot know that a dataset is done */ + printf("\r\n\r\n"); +} + +void srtp_do_rejection_timing(const srtp_policy_t *policy) +{ + int len; + + /* + * note: the output of this function is formatted so that it + * can be used in gnuplot. '#' indicates a comment, and "\r\n" + * terminates a record + */ + + printf("# testing srtp rejection throughput:\r\n"); + printf("# mesg length (octets)\trejections per second\r\n"); + + for (len = 8; len <= 2048; len *= 2) { + printf("%d\t\t\t%e\r\n", len, srtp_rejections_per_second(len, policy)); + } + + /* these extra linefeeds let gnuplot know that a dataset is done */ + printf("\r\n\r\n"); +} + +#define MAX_MSG_LEN 1024 + +double srtp_bits_per_second(int msg_len_octets, const srtp_policy_t *policy) +{ + srtp_t srtp; + srtp_hdr_t *mesg; + int i; + clock_t timer; + int num_trials = 100000; + int input_len, len; + uint32_t ssrc; + srtp_err_status_t status; + + /* + * allocate and initialize an srtp session + */ + status = srtp_create(&srtp, policy); + if (status) { + printf("error: srtp_create() failed with error code %d\n", status); + exit(1); + } + + /* + * if the ssrc is unspecified, use a predetermined one + */ + if (policy->ssrc.type != ssrc_specific) { + ssrc = 0xdeadbeef; + } else { + ssrc = policy->ssrc.value; + } + + /* + * create a test packet + */ + mesg = srtp_create_test_packet(msg_len_octets, ssrc, &input_len); + if (mesg == NULL) { + return 0.0; /* indicate failure by returning zero */ + } + timer = clock(); + for (i = 0; i < num_trials; i++) { + len = input_len; + /* srtp protect message */ + status = srtp_protect(srtp, mesg, &len); + if (status) { + printf("error: srtp_protect() failed with error code %d\n", status); + exit(1); + } + + /* increment message number */ + { + /* hack sequence to avoid problems with macros for htons/ntohs on + * some systems */ + short new_seq = ntohs(mesg->seq) + 1; + mesg->seq = htons(new_seq); + } + } + timer = clock() - timer; + + free(mesg); + + status = srtp_dealloc(srtp); + if (status) { + printf("error: srtp_dealloc() failed with error code %d\n", status); + exit(1); + } + + return (double)(msg_len_octets)*8 * num_trials * CLOCKS_PER_SEC / timer; +} + +double srtp_rejections_per_second(int msg_len_octets, + const srtp_policy_t *policy) +{ + srtp_ctx_t *srtp; + srtp_hdr_t *mesg; + int i; + int len; + clock_t timer; + int num_trials = 1000000; + uint32_t ssrc = policy->ssrc.value; + srtp_err_status_t status; + + /* + * allocate and initialize an srtp session + */ + status = srtp_create(&srtp, policy); + if (status) { + printf("error: srtp_create() failed with error code %d\n", status); + exit(1); + } + + mesg = srtp_create_test_packet(msg_len_octets, ssrc, &len); + if (mesg == NULL) { + return 0.0; /* indicate failure by returning zero */ + } + srtp_protect(srtp, (srtp_hdr_t *)mesg, &len); + + timer = clock(); + for (i = 0; i < num_trials; i++) { + len = msg_len_octets; + srtp_unprotect(srtp, (srtp_hdr_t *)mesg, &len); + } + timer = clock() - timer; + + free(mesg); + + status = srtp_dealloc(srtp); + if (status) { + printf("error: srtp_dealloc() failed with error code %d\n", status); + exit(1); + } + + return (double)num_trials * CLOCKS_PER_SEC / timer; +} + +void err_check(srtp_err_status_t s) +{ + if (s != srtp_err_status_ok) { + fprintf(stderr, "error: unexpected srtp failure (code %d)\n", s); + exit(1); + } +} + +srtp_err_status_t srtp_test_call_protect(srtp_t srtp_sender, + srtp_hdr_t *hdr, + int *len, + int mki_index) +{ + if (mki_index == -1) { + return srtp_protect(srtp_sender, hdr, len); + } else { + return srtp_protect_mki(srtp_sender, hdr, len, 1, mki_index); + } +} + +srtp_err_status_t srtp_test_call_protect_rtcp(srtp_t srtp_sender, + srtp_hdr_t *hdr, + int *len, + int mki_index) +{ + if (mki_index == -1) { + return srtp_protect_rtcp(srtp_sender, hdr, len); + } else { + return srtp_protect_rtcp_mki(srtp_sender, hdr, len, 1, mki_index); + } +} + +srtp_err_status_t srtp_test_call_unprotect(srtp_t srtp_sender, + srtp_hdr_t *hdr, + int *len, + int use_mki) +{ + if (use_mki == -1) { + return srtp_unprotect(srtp_sender, hdr, len); + } else { + return srtp_unprotect_mki(srtp_sender, hdr, len, use_mki); + } +} + +srtp_err_status_t srtp_test_call_unprotect_rtcp(srtp_t srtp_sender, + srtp_hdr_t *hdr, + int *len, + int use_mki) +{ + if (use_mki == -1) { + return srtp_unprotect_rtcp(srtp_sender, hdr, len); + } else { + return srtp_unprotect_rtcp_mki(srtp_sender, hdr, len, use_mki); + } +} + +srtp_err_status_t srtp_test(const srtp_policy_t *policy, + int extension_header, + int mki_index) +{ + int i; + srtp_t srtp_sender; + srtp_t srtp_rcvr; + srtp_err_status_t status = srtp_err_status_ok; + srtp_hdr_t *hdr, *hdr2; + uint8_t hdr_enc[64]; + uint8_t *pkt_end; + int msg_len_octets, msg_len_enc, msg_len; + int len, len2; + uint32_t tag_length; + uint32_t ssrc; + srtp_policy_t *rcvr_policy; + srtp_policy_t tmp_policy; + int header = 1; + int use_mki = 0; + + if (mki_index >= 0) + use_mki = 1; + + if (extension_header) { + memcpy(&tmp_policy, policy, sizeof(srtp_policy_t)); + tmp_policy.enc_xtn_hdr = &header; + tmp_policy.enc_xtn_hdr_count = 1; + err_check(srtp_create(&srtp_sender, &tmp_policy)); + } else { + err_check(srtp_create(&srtp_sender, policy)); + } + + /* print out policy */ + err_check(srtp_session_print_policy(srtp_sender)); + + /* + * initialize data buffer, using the ssrc in the policy unless that + * value is a wildcard, in which case we'll just use an arbitrary + * one + */ + if (policy->ssrc.type != ssrc_specific) { + ssrc = 0xdecafbad; + } else { + ssrc = policy->ssrc.value; + } + msg_len_octets = 28; + if (extension_header) { + hdr = srtp_create_test_packet_ext_hdr(msg_len_octets, ssrc, &len); + hdr2 = srtp_create_test_packet_ext_hdr(msg_len_octets, ssrc, &len2); + } else { + hdr = srtp_create_test_packet(msg_len_octets, ssrc, &len); + hdr2 = srtp_create_test_packet(msg_len_octets, ssrc, &len2); + } + + /* save original msg len */ + msg_len = len; + + if (hdr == NULL) { + free(hdr2); + return srtp_err_status_alloc_fail; + } + if (hdr2 == NULL) { + free(hdr); + return srtp_err_status_alloc_fail; + } + + debug_print(mod_driver, "before protection:\n%s", + srtp_packet_to_string(hdr, len)); + +#if PRINT_REFERENCE_PACKET + debug_print(mod_driver, "reference packet before protection:\n%s", + octet_string_hex_string((uint8_t *)hdr, len)); +#endif + err_check(srtp_test_call_protect(srtp_sender, hdr, &len, mki_index)); + + debug_print(mod_driver, "after protection:\n%s", + srtp_packet_to_string(hdr, len)); +#if PRINT_REFERENCE_PACKET + debug_print(mod_driver, "after protection:\n%s", + octet_string_hex_string((uint8_t *)hdr, len)); +#endif + + /* save protected message and length */ + memcpy(hdr_enc, hdr, len); + msg_len_enc = len; + + /* + * check for overrun of the srtp_protect() function + * + * The packet is followed by a value of 0xfffff; if the value of the + * data following the packet is different, then we know that the + * protect function is overwriting the end of the packet. + */ + err_check(srtp_get_protect_trailer_length(srtp_sender, use_mki, mki_index, + &tag_length)); + pkt_end = (uint8_t *)hdr + msg_len + tag_length; + for (i = 0; i < 4; i++) { + if (pkt_end[i] != 0xff) { + fprintf(stdout, "overwrite in srtp_protect() function " + "(expected %x, found %x in trailing octet %d)\n", + 0xff, ((uint8_t *)hdr)[i], i); + free(hdr); + free(hdr2); + return srtp_err_status_algo_fail; + } + } + + /* + * if the policy includes confidentiality, check that ciphertext is + * different than plaintext + * + * Note that this check will give false negatives, with some small + * probability, especially if the packets are short. For that + * reason, we skip this check if the plaintext is less than four + * octets long. + */ + if ((policy->rtp.sec_serv & sec_serv_conf) && (msg_len_octets >= 4)) { + printf("testing that ciphertext is distinct from plaintext..."); + status = srtp_err_status_algo_fail; + for (i = 12; i < msg_len_octets + 12; i++) { + if (((uint8_t *)hdr)[i] != ((uint8_t *)hdr2)[i]) { + status = srtp_err_status_ok; + } + } + if (status) { + printf("failed\n"); + free(hdr); + free(hdr2); + return status; + } + printf("passed\n"); + } + + /* + * if the policy uses a 'wildcard' ssrc, then we need to make a copy + * of the policy that changes the direction to inbound + * + * we always copy the policy into the rcvr_policy, since otherwise + * the compiler would fret about the constness of the policy + */ + rcvr_policy = (srtp_policy_t *)malloc(sizeof(srtp_policy_t)); + if (rcvr_policy == NULL) { + free(hdr); + free(hdr2); + return srtp_err_status_alloc_fail; + } + if (extension_header) { + memcpy(rcvr_policy, &tmp_policy, sizeof(srtp_policy_t)); + if (tmp_policy.ssrc.type == ssrc_any_outbound) { + rcvr_policy->ssrc.type = ssrc_any_inbound; + } + } else { + memcpy(rcvr_policy, policy, sizeof(srtp_policy_t)); + if (policy->ssrc.type == ssrc_any_outbound) { + rcvr_policy->ssrc.type = ssrc_any_inbound; + } + } + + err_check(srtp_create(&srtp_rcvr, rcvr_policy)); + + err_check(srtp_test_call_unprotect(srtp_rcvr, hdr, &len, use_mki)); + + debug_print(mod_driver, "after unprotection:\n%s", + srtp_packet_to_string(hdr, len)); + + /* verify that the unprotected packet matches the origial one */ + for (i = 0; i < len; i++) { + if (((uint8_t *)hdr)[i] != ((uint8_t *)hdr2)[i]) { + fprintf(stdout, "mismatch at octet %d\n", i); + status = srtp_err_status_algo_fail; + } + } + if (status) { + free(hdr); + free(hdr2); + free(rcvr_policy); + return status; + } + + /* + * if the policy includes authentication, then test for false positives + */ + if (policy->rtp.sec_serv & sec_serv_auth) { + char *data = ((char *)hdr) + (extension_header ? 24 : 12); + + printf("testing for false positives in replay check..."); + + /* unprotect a second time - should fail with a replay error */ + status = + srtp_test_call_unprotect(srtp_rcvr, hdr, &msg_len_enc, use_mki); + if (status != srtp_err_status_replay_fail) { + printf("failed with error code %d\n", status); + free(hdr); + free(hdr2); + free(rcvr_policy); + return status; + } else { + printf("passed\n"); + } + + printf("testing for false positives in auth check..."); + + /* increment sequence number in header */ + hdr->seq++; + + /* apply protection */ + err_check(srtp_test_call_protect(srtp_sender, hdr, &len, mki_index)); + + /* flip bits in packet */ + data[0] ^= 0xff; + + /* unprotect, and check for authentication failure */ + status = srtp_test_call_unprotect(srtp_rcvr, hdr, &len, use_mki); + if (status != srtp_err_status_auth_fail) { + printf("failed\n"); + free(hdr); + free(hdr2); + free(rcvr_policy); + return status; + } else { + printf("passed\n"); + } + } + + err_check(srtp_dealloc(srtp_sender)); + err_check(srtp_dealloc(srtp_rcvr)); + + free(hdr); + free(hdr2); + free(rcvr_policy); + return srtp_err_status_ok; +} + +srtp_err_status_t srtcp_test(const srtp_policy_t *policy, int mki_index) +{ + int i; + srtp_t srtcp_sender; + srtp_t srtcp_rcvr; + srtp_err_status_t status = srtp_err_status_ok; + srtp_hdr_t *hdr, *hdr2; + uint8_t hdr_enc[64]; + uint8_t *pkt_end; + int msg_len_octets, msg_len_enc, msg_len; + int len, len2; + uint32_t tag_length; + uint32_t ssrc; + srtp_policy_t *rcvr_policy; + int use_mki = 0; + + if (mki_index >= 0) + use_mki = 1; + + err_check(srtp_create(&srtcp_sender, policy)); + + /* print out policy */ + err_check(srtp_session_print_policy(srtcp_sender)); + + /* + * initialize data buffer, using the ssrc in the policy unless that + * value is a wildcard, in which case we'll just use an arbitrary + * one + */ + if (policy->ssrc.type != ssrc_specific) { + ssrc = 0xdecafbad; + } else { + ssrc = policy->ssrc.value; + } + msg_len_octets = 28; + hdr = srtp_create_test_packet(msg_len_octets, ssrc, &len); + /* save message len */ + msg_len = len; + + if (hdr == NULL) { + return srtp_err_status_alloc_fail; + } + hdr2 = srtp_create_test_packet(msg_len_octets, ssrc, &len2); + if (hdr2 == NULL) { + free(hdr); + return srtp_err_status_alloc_fail; + } + + debug_print(mod_driver, "before protection:\n%s", + srtp_packet_to_string(hdr, len)); + +#if PRINT_REFERENCE_PACKET + debug_print(mod_driver, "reference packet before protection:\n%s", + octet_string_hex_string((uint8_t *)hdr, len)); +#endif + err_check(srtp_test_call_protect_rtcp(srtcp_sender, hdr, &len, mki_index)); + + debug_print(mod_driver, "after protection:\n%s", + srtp_packet_to_string(hdr, len)); +#if PRINT_REFERENCE_PACKET + debug_print(mod_driver, "after protection:\n%s", + octet_string_hex_string((uint8_t *)hdr, len)); +#endif + + /* save protected message and length */ + memcpy(hdr_enc, hdr, len); + msg_len_enc = len; + + /* + * check for overrun of the srtp_protect() function + * + * The packet is followed by a value of 0xfffff; if the value of the + * data following the packet is different, then we know that the + * protect function is overwriting the end of the packet. + */ + srtp_get_protect_rtcp_trailer_length(srtcp_sender, use_mki, mki_index, + &tag_length); + pkt_end = (uint8_t *)hdr + msg_len + tag_length; + for (i = 0; i < 4; i++) { + if (pkt_end[i] != 0xff) { + fprintf(stdout, "overwrite in srtp_protect_rtcp() function " + "(expected %x, found %x in trailing octet %d)\n", + 0xff, ((uint8_t *)hdr)[i], i); + free(hdr); + free(hdr2); + return srtp_err_status_algo_fail; + } + } + + /* + * if the policy includes confidentiality, check that ciphertext is + * different than plaintext + * + * Note that this check will give false negatives, with some small + * probability, especially if the packets are short. For that + * reason, we skip this check if the plaintext is less than four + * octets long. + */ + if ((policy->rtcp.sec_serv & sec_serv_conf) && (msg_len_octets >= 4)) { + printf("testing that ciphertext is distinct from plaintext..."); + status = srtp_err_status_algo_fail; + for (i = 12; i < msg_len_octets + 12; i++) { + if (((uint8_t *)hdr)[i] != ((uint8_t *)hdr2)[i]) { + status = srtp_err_status_ok; + } + } + if (status) { + printf("failed\n"); + free(hdr); + free(hdr2); + return status; + } + printf("passed\n"); + } + + /* + * if the policy uses a 'wildcard' ssrc, then we need to make a copy + * of the policy that changes the direction to inbound + * + * we always copy the policy into the rcvr_policy, since otherwise + * the compiler would fret about the constness of the policy + */ + rcvr_policy = (srtp_policy_t *)malloc(sizeof(srtp_policy_t)); + if (rcvr_policy == NULL) { + free(hdr); + free(hdr2); + return srtp_err_status_alloc_fail; + } + memcpy(rcvr_policy, policy, sizeof(srtp_policy_t)); + if (policy->ssrc.type == ssrc_any_outbound) { + rcvr_policy->ssrc.type = ssrc_any_inbound; + } + + err_check(srtp_create(&srtcp_rcvr, rcvr_policy)); + + err_check(srtp_test_call_unprotect_rtcp(srtcp_rcvr, hdr, &len, use_mki)); + + debug_print(mod_driver, "after unprotection:\n%s", + srtp_packet_to_string(hdr, len)); + + /* verify that the unprotected packet matches the origial one */ + for (i = 0; i < len; i++) { + if (((uint8_t *)hdr)[i] != ((uint8_t *)hdr2)[i]) { + fprintf(stdout, "mismatch at octet %d\n", i); + status = srtp_err_status_algo_fail; + } + } + if (status) { + free(hdr); + free(hdr2); + free(rcvr_policy); + return status; + } + + /* + * if the policy includes authentication, then test for false positives + */ + if (policy->rtp.sec_serv & sec_serv_auth) { + char *data = ((char *)hdr) + 12; + + printf("testing for false positives in replay check..."); + + /* unprotect a second time - should fail with a replay error */ + status = srtp_test_call_unprotect_rtcp(srtcp_rcvr, hdr, &msg_len_enc, + use_mki); + if (status != srtp_err_status_replay_fail) { + printf("failed with error code %d\n", status); + free(hdr); + free(hdr2); + free(rcvr_policy); + return status; + } else { + printf("passed\n"); + } + + printf("testing for false positives in auth check..."); + + /* increment sequence number in header */ + hdr->seq++; + + /* apply protection */ + err_check( + srtp_test_call_protect_rtcp(srtcp_sender, hdr, &len, mki_index)); + + /* flip bits in packet */ + data[0] ^= 0xff; + + /* unprotect, and check for authentication failure */ + status = srtp_test_call_unprotect_rtcp(srtcp_rcvr, hdr, &len, use_mki); + if (status != srtp_err_status_auth_fail) { + printf("failed\n"); + free(hdr); + free(hdr2); + free(rcvr_policy); + return status; + } else { + printf("passed\n"); + } + } + + err_check(srtp_dealloc(srtcp_sender)); + err_check(srtp_dealloc(srtcp_rcvr)); + + free(hdr); + free(hdr2); + free(rcvr_policy); + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_session_print_policy(srtp_t srtp) +{ + char *serv_descr[4] = { "none", "confidentiality", "authentication", + "confidentiality and authentication" }; + char *direction[3] = { "unknown", "outbound", "inbound" }; + srtp_stream_t stream; + srtp_session_keys_t *session_keys = NULL; + + /* sanity checking */ + if (srtp == NULL) { + return srtp_err_status_fail; + } + + /* if there's a template stream, print it out */ + if (srtp->stream_template != NULL) { + stream = srtp->stream_template; + session_keys = &stream->session_keys[0]; + printf("# SSRC: any %s\r\n" + "# rtp cipher: %s\r\n" + "# rtp auth: %s\r\n" + "# rtp services: %s\r\n" + "# rtcp cipher: %s\r\n" + "# rtcp auth: %s\r\n" + "# rtcp services: %s\r\n" + "# window size: %lu\r\n" + "# tx rtx allowed:%s\r\n", + direction[stream->direction], + session_keys->rtp_cipher->type->description, + session_keys->rtp_auth->type->description, + serv_descr[stream->rtp_services], + session_keys->rtcp_cipher->type->description, + session_keys->rtcp_auth->type->description, + serv_descr[stream->rtcp_services], + srtp_rdbx_get_window_size(&stream->rtp_rdbx), + stream->allow_repeat_tx ? "true" : "false"); + + printf("# Encrypted extension headers: "); + if (stream->enc_xtn_hdr && stream->enc_xtn_hdr_count > 0) { + int *enc_xtn_hdr = stream->enc_xtn_hdr; + int count = stream->enc_xtn_hdr_count; + while (count > 0) { + printf("%d ", *enc_xtn_hdr); + enc_xtn_hdr++; + count--; + } + printf("\n"); + } else { + printf("none\n"); + } + } + + /* loop over streams in session, printing the policy of each */ + stream = srtp->stream_list; + while (stream != NULL) { + if (stream->rtp_services > sec_serv_conf_and_auth) { + return srtp_err_status_bad_param; + } + session_keys = &stream->session_keys[0]; + + printf("# SSRC: 0x%08x\r\n" + "# rtp cipher: %s\r\n" + "# rtp auth: %s\r\n" + "# rtp services: %s\r\n" + "# rtcp cipher: %s\r\n" + "# rtcp auth: %s\r\n" + "# rtcp services: %s\r\n" + "# window size: %lu\r\n" + "# tx rtx allowed:%s\r\n", + stream->ssrc, session_keys->rtp_cipher->type->description, + session_keys->rtp_auth->type->description, + serv_descr[stream->rtp_services], + session_keys->rtcp_cipher->type->description, + session_keys->rtcp_auth->type->description, + serv_descr[stream->rtcp_services], + srtp_rdbx_get_window_size(&stream->rtp_rdbx), + stream->allow_repeat_tx ? "true" : "false"); + + printf("# Encrypted extension headers: "); + if (stream->enc_xtn_hdr && stream->enc_xtn_hdr_count > 0) { + int *enc_xtn_hdr = stream->enc_xtn_hdr; + int count = stream->enc_xtn_hdr_count; + while (count > 0) { + printf("%d ", *enc_xtn_hdr); + enc_xtn_hdr++; + count--; + } + printf("\n"); + } else { + printf("none\n"); + } + + /* advance to next stream in the list */ + stream = stream->next; + } + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_print_policy(const srtp_policy_t *policy) +{ + srtp_err_status_t status; + srtp_t session; + + status = srtp_create(&session, policy); + if (status) { + return status; + } + status = srtp_session_print_policy(session); + if (status) { + return status; + } + status = srtp_dealloc(session); + if (status) { + return status; + } + return srtp_err_status_ok; +} + +/* + * srtp_print_packet(...) is for debugging only + * it prints an RTP packet to the stdout + * + * note that this function is *not* threadsafe + */ + +#include <stdio.h> + +#define MTU 2048 + +char packet_string[MTU]; + +char *srtp_packet_to_string(srtp_hdr_t *hdr, int pkt_octet_len) +{ + int octets_in_rtp_header = 12; + uint8_t *data = ((uint8_t *)hdr) + octets_in_rtp_header; + int hex_len = pkt_octet_len - octets_in_rtp_header; + + /* sanity checking */ + if ((hdr == NULL) || (pkt_octet_len > MTU)) { + return NULL; + } + + /* write packet into string */ + sprintf(packet_string, "(s)rtp packet: {\n" + " version:\t%d\n" + " p:\t\t%d\n" + " x:\t\t%d\n" + " cc:\t\t%d\n" + " m:\t\t%d\n" + " pt:\t\t%x\n" + " seq:\t\t%x\n" + " ts:\t\t%x\n" + " ssrc:\t%x\n" + " data:\t%s\n" + "} (%d octets in total)\n", + hdr->version, hdr->p, hdr->x, hdr->cc, hdr->m, hdr->pt, hdr->seq, + hdr->ts, hdr->ssrc, octet_string_hex_string(data, hex_len), + pkt_octet_len); + + return packet_string; +} + +/* + * mips_estimate() is a simple function to estimate the number of + * instructions per second that the host can perform. note that this + * function can be grossly wrong; you may want to have a manual sanity + * check of its output! + * + * the 'ignore' pointer is there to convince the compiler to not just + * optimize away the function + */ + +double mips_estimate(int num_trials, int *ignore) +{ + clock_t t; + volatile int i, sum; + + sum = 0; + t = clock(); + for (i = 0; i < num_trials; i++) { + sum += i; + } + t = clock() - t; + if (t < 1) { + t = 1; + } + + /* printf("%d\n", sum); */ + *ignore = sum; + + return (double)num_trials * CLOCKS_PER_SEC / t; +} + +/* + * srtp_validate() verifies the correctness of libsrtp by comparing + * some computed packets against some pre-computed reference values. + * These packets were made with the default SRTP policy. + */ + +srtp_err_status_t srtp_validate() +{ + // clang-format off + uint8_t srtp_plaintext_ref[28] = { + 0x80, 0x0f, 0x12, 0x34, 0xde, 0xca, 0xfb, 0xad, + 0xca, 0xfe, 0xba, 0xbe, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab + }; + uint8_t srtp_plaintext[38] = { + 0x80, 0x0f, 0x12, 0x34, 0xde, 0xca, 0xfb, 0xad, + 0xca, 0xfe, 0xba, 0xbe, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 + }; + uint8_t srtp_ciphertext[38] = { + 0x80, 0x0f, 0x12, 0x34, 0xde, 0xca, 0xfb, 0xad, + 0xca, 0xfe, 0xba, 0xbe, 0x4e, 0x55, 0xdc, 0x4c, + 0xe7, 0x99, 0x78, 0xd8, 0x8c, 0xa4, 0xd2, 0x15, + 0x94, 0x9d, 0x24, 0x02, 0xb7, 0x8d, 0x6a, 0xcc, + 0x99, 0xea, 0x17, 0x9b, 0x8d, 0xbb + }; + uint8_t rtcp_plaintext_ref[24] = { + 0x81, 0xc8, 0x00, 0x0b, 0xca, 0xfe, 0xba, 0xbe, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + }; + uint8_t rtcp_plaintext[38] = { + 0x81, 0xc8, 0x00, 0x0b, 0xca, 0xfe, 0xba, 0xbe, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 + }; + uint8_t srtcp_ciphertext[38] = { + 0x81, 0xc8, 0x00, 0x0b, 0xca, 0xfe, 0xba, 0xbe, + 0x71, 0x28, 0x03, 0x5b, 0xe4, 0x87, 0xb9, 0xbd, + 0xbe, 0xf8, 0x90, 0x41, 0xf9, 0x77, 0xa5, 0xa8, + 0x80, 0x00, 0x00, 0x01, 0x99, 0x3e, 0x08, 0xcd, + 0x54, 0xd6, 0xc1, 0x23, 0x07, 0x98 + }; + // clang-format on + + srtp_t srtp_snd, srtp_recv; + srtp_err_status_t status; + int len; + srtp_policy_t policy; + + /* + * create a session with a single stream using the default srtp + * policy and with the SSRC value 0xcafebabe + */ + memset(&policy, 0, sizeof(policy)); + srtp_crypto_policy_set_rtp_default(&policy.rtp); + srtp_crypto_policy_set_rtcp_default(&policy.rtcp); + policy.ssrc.type = ssrc_specific; + policy.ssrc.value = 0xcafebabe; + policy.key = test_key; + policy.deprecated_ekt = NULL; + policy.window_size = 128; + policy.allow_repeat_tx = 0; + policy.next = NULL; + + status = srtp_create(&srtp_snd, &policy); + if (status) { + return status; + } + + /* + * protect plaintext, then compare with ciphertext + */ + len = 28; + status = srtp_protect(srtp_snd, srtp_plaintext, &len); + if (status || (len != 38)) { + return srtp_err_status_fail; + } + + debug_print(mod_driver, "ciphertext:\n %s", + octet_string_hex_string(srtp_plaintext, len)); + debug_print(mod_driver, "ciphertext reference:\n %s", + octet_string_hex_string(srtp_ciphertext, len)); + + if (srtp_octet_string_is_eq(srtp_plaintext, srtp_ciphertext, len)) { + return srtp_err_status_fail; + } + + /* + * protect plaintext rtcp, then compare with srtcp ciphertext + */ + len = 24; + status = srtp_protect_rtcp(srtp_snd, rtcp_plaintext, &len); + if (status || (len != 38)) { + return srtp_err_status_fail; + } + + debug_print(mod_driver, "srtcp ciphertext:\n %s", + octet_string_hex_string(rtcp_plaintext, len)); + debug_print(mod_driver, "srtcp ciphertext reference:\n %s", + octet_string_hex_string(srtcp_ciphertext, len)); + + if (srtp_octet_string_is_eq(rtcp_plaintext, srtcp_ciphertext, len)) { + return srtp_err_status_fail; + } + + /* + * create a receiver session context comparable to the one created + * above - we need to do this so that the replay checking doesn't + * complain + */ + status = srtp_create(&srtp_recv, &policy); + if (status) { + return status; + } + + /* + * unprotect ciphertext, then compare with plaintext + */ + status = srtp_unprotect(srtp_recv, srtp_ciphertext, &len); + if (status || (len != 28)) { + return status; + } + + if (srtp_octet_string_is_eq(srtp_ciphertext, srtp_plaintext_ref, len)) { + return srtp_err_status_fail; + } + + /* + * unprotect srtcp ciphertext, then compare with rtcp plaintext + */ + len = 38; + status = srtp_unprotect_rtcp(srtp_recv, srtcp_ciphertext, &len); + if (status || (len != 24)) { + return status; + } + + if (srtp_octet_string_is_eq(srtcp_ciphertext, rtcp_plaintext_ref, len)) { + return srtp_err_status_fail; + } + + status = srtp_dealloc(srtp_snd); + if (status) { + return status; + } + + status = srtp_dealloc(srtp_recv); + if (status) { + return status; + } + + return srtp_err_status_ok; +} + +/* + * srtp_validate_null() verifies the correctness of libsrtp by comparing + * some computed packets against some pre-computed reference values. + * These packets were made with a policy that applies null encryption + * and HMAC authentication. + */ + +srtp_err_status_t srtp_validate_null() +{ + // clang-format off + uint8_t srtp_plaintext_ref[28] = { + 0x80, 0x0f, 0x12, 0x34, 0xde, 0xca, 0xfb, 0xad, + 0xca, 0xfe, 0xba, 0xbe, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab + }; + uint8_t srtp_plaintext[38] = { + 0x80, 0x0f, 0x12, 0x34, 0xde, 0xca, 0xfb, 0xad, + 0xca, 0xfe, 0xba, 0xbe, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 + }; + uint8_t srtp_ciphertext[38] = { + 0x80, 0x0f, 0x12, 0x34, 0xde, 0xca, 0xfb, 0xad, + 0xca, 0xfe, 0xba, 0xbe, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xa1, 0x36, 0x27, + 0x0b, 0x67, 0x91, 0x34, 0xce, 0x9b + }; + uint8_t rtcp_plaintext_ref[24] = { + 0x81, 0xc8, 0x00, 0x0b, 0xca, 0xfe, 0xba, 0xbe, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + }; + uint8_t rtcp_plaintext[38] = { + 0x81, 0xc8, 0x00, 0x0b, 0xca, 0xfe, 0xba, 0xbe, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 + }; + uint8_t srtcp_ciphertext[38] = { + 0x81, 0xc8, 0x00, 0x0b, 0xca, 0xfe, 0xba, 0xbe, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + 0x00, 0x00, 0x00, 0x01, 0xfe, 0x88, 0xc7, 0xfd, + 0xfd, 0x37, 0xeb, 0xce, 0x61, 0x5d, + }; + // clang-format on + + srtp_t srtp_snd, srtp_recv; + srtp_err_status_t status; + int len; + srtp_policy_t policy; + + /* + * create a session with a single stream using the default srtp + * policy and with the SSRC value 0xcafebabe + */ + memset(&policy, 0, sizeof(policy)); + srtp_crypto_policy_set_null_cipher_hmac_sha1_80(&policy.rtp); + srtp_crypto_policy_set_null_cipher_hmac_sha1_80(&policy.rtcp); + policy.ssrc.type = ssrc_specific; + policy.ssrc.value = 0xcafebabe; + policy.key = test_key; + policy.deprecated_ekt = NULL; + policy.window_size = 128; + policy.allow_repeat_tx = 0; + policy.next = NULL; + + status = srtp_create(&srtp_snd, &policy); + if (status) { + return status; + } + + /* + * protect plaintext, then compare with ciphertext + */ + len = 28; + status = srtp_protect(srtp_snd, srtp_plaintext, &len); + if (status || (len != 38)) { + return srtp_err_status_fail; + } + + debug_print(mod_driver, "ciphertext:\n %s", + octet_string_hex_string(srtp_plaintext, len)); + debug_print(mod_driver, "ciphertext reference:\n %s", + octet_string_hex_string(srtp_ciphertext, len)); + + if (srtp_octet_string_is_eq(srtp_plaintext, srtp_ciphertext, len)) { + return srtp_err_status_fail; + } + + /* + * protect plaintext rtcp, then compare with srtcp ciphertext + */ + len = 24; + status = srtp_protect_rtcp(srtp_snd, rtcp_plaintext, &len); + if (status || (len != 38)) { + return srtp_err_status_fail; + } + + debug_print(mod_driver, "srtcp ciphertext:\n %s", + octet_string_hex_string(rtcp_plaintext, len)); + debug_print(mod_driver, "srtcp ciphertext reference:\n %s", + octet_string_hex_string(srtcp_ciphertext, len)); + + if (srtp_octet_string_is_eq(rtcp_plaintext, srtcp_ciphertext, len)) { + return srtp_err_status_fail; + } + + /* + * create a receiver session context comparable to the one created + * above - we need to do this so that the replay checking doesn't + * complain + */ + status = srtp_create(&srtp_recv, &policy); + if (status) { + return status; + } + + /* + * unprotect ciphertext, then compare with plaintext + */ + status = srtp_unprotect(srtp_recv, srtp_ciphertext, &len); + if (status || (len != 28)) { + return status; + } + + if (srtp_octet_string_is_eq(srtp_ciphertext, srtp_plaintext_ref, len)) { + return srtp_err_status_fail; + } + + /* + * unprotect srtcp ciphertext, then compare with rtcp plaintext + */ + len = 38; + status = srtp_unprotect_rtcp(srtp_recv, srtcp_ciphertext, &len); + if (status || (len != 24)) { + return status; + } + + if (srtp_octet_string_is_eq(srtcp_ciphertext, rtcp_plaintext_ref, len)) { + return srtp_err_status_fail; + } + + status = srtp_dealloc(srtp_snd); + if (status) { + return status; + } + + status = srtp_dealloc(srtp_recv); + if (status) { + return status; + } + + return srtp_err_status_ok; +} + +#ifdef GCM +/* + * srtp_validate_gcm() verifies the correctness of libsrtp by comparing + * an computed packet against the known ciphertext for the plaintext. + */ +srtp_err_status_t srtp_validate_gcm() +{ + // clang-format off + unsigned char test_key_gcm[28] = { + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, + 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, + 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, + 0xa8, 0xa9, 0xaa, 0xab + }; + uint8_t rtp_plaintext_ref[28] = { + 0x80, 0x0f, 0x12, 0x34, 0xde, 0xca, 0xfb, 0xad, + 0xca, 0xfe, 0xba, 0xbe, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab + }; + uint8_t rtp_plaintext[44] = { + 0x80, 0x0f, 0x12, 0x34, 0xde, 0xca, 0xfb, 0xad, + 0xca, 0xfe, 0xba, 0xbe, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00 + }; + uint8_t srtp_ciphertext[44] = { + 0x80, 0x0f, 0x12, 0x34, 0xde, 0xca, 0xfb, 0xad, + 0xca, 0xfe, 0xba, 0xbe, 0xc5, 0x00, 0x2e, 0xde, + 0x04, 0xcf, 0xdd, 0x2e, 0xb9, 0x11, 0x59, 0xe0, + 0x88, 0x0a, 0xa0, 0x6e, 0xd2, 0x97, 0x68, 0x26, + 0xf7, 0x96, 0xb2, 0x01, 0xdf, 0x31, 0x31, 0xa1, + 0x27, 0xe8, 0xa3, 0x92 + }; + uint8_t rtcp_plaintext_ref[24] = { + 0x81, 0xc8, 0x00, 0x0b, 0xca, 0xfe, 0xba, 0xbe, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + }; + uint8_t rtcp_plaintext[44] = { + 0x81, 0xc8, 0x00, 0x0b, 0xca, 0xfe, 0xba, 0xbe, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00 + }; + uint8_t srtcp_ciphertext[44] = { + 0x81, 0xc8, 0x00, 0x0b, 0xca, 0xfe, 0xba, 0xbe, + 0xc9, 0x8b, 0x8b, 0x5d, 0xf0, 0x39, 0x2a, 0x55, + 0x85, 0x2b, 0x6c, 0x21, 0xac, 0x8e, 0x70, 0x25, + 0xc5, 0x2c, 0x6f, 0xbe, 0xa2, 0xb3, 0xb4, 0x46, + 0xea, 0x31, 0x12, 0x3b, 0xa8, 0x8c, 0xe6, 0x1e, + 0x80, 0x00, 0x00, 0x01 + }; + // clang-format on + + srtp_t srtp_snd, srtp_recv; + srtp_err_status_t status; + int len; + srtp_policy_t policy; + + /* + * create a session with a single stream using the default srtp + * policy and with the SSRC value 0xcafebabe + */ + memset(&policy, 0, sizeof(policy)); + srtp_crypto_policy_set_aes_gcm_128_16_auth(&policy.rtp); + srtp_crypto_policy_set_aes_gcm_128_16_auth(&policy.rtcp); + policy.ssrc.type = ssrc_specific; + policy.ssrc.value = 0xcafebabe; + policy.key = test_key_gcm; + policy.deprecated_ekt = NULL; + policy.window_size = 128; + policy.allow_repeat_tx = 0; + policy.next = NULL; + + status = srtp_create(&srtp_snd, &policy); + if (status) { + return status; + } + + /* + * protect plaintext rtp, then compare with srtp ciphertext + */ + len = 28; + status = srtp_protect(srtp_snd, rtp_plaintext, &len); + if (status || (len != 44)) { + return srtp_err_status_fail; + } + + debug_print(mod_driver, "srtp ciphertext:\n %s", + octet_string_hex_string(rtp_plaintext, len)); + debug_print(mod_driver, "srtp ciphertext reference:\n %s", + octet_string_hex_string(srtp_ciphertext, len)); + + if (srtp_octet_string_is_eq(rtp_plaintext, srtp_ciphertext, len)) { + return srtp_err_status_fail; + } + + /* + * protect plaintext rtcp, then compare with srtcp ciphertext + */ + len = 24; + status = srtp_protect_rtcp(srtp_snd, rtcp_plaintext, &len); + if (status || (len != 44)) { + return srtp_err_status_fail; + } + + debug_print(mod_driver, "srtcp ciphertext:\n %s", + octet_string_hex_string(rtcp_plaintext, len)); + debug_print(mod_driver, "srtcp ciphertext reference:\n %s", + octet_string_hex_string(srtcp_ciphertext, len)); + + if (srtp_octet_string_is_eq(rtcp_plaintext, srtcp_ciphertext, len)) { + return srtp_err_status_fail; + } + + /* + * create a receiver session context comparable to the one created + * above - we need to do this so that the replay checking doesn't + * complain + */ + status = srtp_create(&srtp_recv, &policy); + if (status) { + return status; + } + + /* + * unprotect srtp ciphertext, then compare with rtp plaintext + */ + len = 44; + status = srtp_unprotect(srtp_recv, srtp_ciphertext, &len); + if (status || (len != 28)) { + return status; + } + + if (srtp_octet_string_is_eq(srtp_ciphertext, rtp_plaintext_ref, len)) { + return srtp_err_status_fail; + } + + /* + * unprotect srtcp ciphertext, then compare with rtcp plaintext + */ + len = 44; + status = srtp_unprotect_rtcp(srtp_recv, srtcp_ciphertext, &len); + if (status || (len != 24)) { + return status; + } + + if (srtp_octet_string_is_eq(srtcp_ciphertext, rtcp_plaintext_ref, len)) { + return srtp_err_status_fail; + } + + status = srtp_dealloc(srtp_snd); + if (status) { + return status; + } + + status = srtp_dealloc(srtp_recv); + if (status) { + return status; + } + + return srtp_err_status_ok; +} +#endif + +/* + * Test vectors taken from RFC 6904, Appendix A + */ +srtp_err_status_t srtp_validate_encrypted_extensions_headers() +{ + // clang-format off + unsigned char test_key_ext_headers[30] = { + 0xe1, 0xf9, 0x7a, 0x0d, 0x3e, 0x01, 0x8b, 0xe0, + 0xd6, 0x4f, 0xa3, 0x2c, 0x06, 0xde, 0x41, 0x39, + 0x0e, 0xc6, 0x75, 0xad, 0x49, 0x8a, 0xfe, 0xeb, + 0xb6, 0x96, 0x0b, 0x3a, 0xab, 0xe6 + }; + uint8_t srtp_plaintext_ref[56] = { + 0x90, 0x0f, 0x12, 0x34, 0xde, 0xca, 0xfb, 0xad, + 0xca, 0xfe, 0xba, 0xbe, 0xBE, 0xDE, 0x00, 0x06, + 0x17, 0x41, 0x42, 0x73, 0xA4, 0x75, 0x26, 0x27, + 0x48, 0x22, 0x00, 0x00, 0xC8, 0x30, 0x8E, 0x46, + 0x55, 0x99, 0x63, 0x86, 0xB3, 0x95, 0xFB, 0x00, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab + }; + uint8_t srtp_plaintext[66] = { + 0x90, 0x0f, 0x12, 0x34, 0xde, 0xca, 0xfb, 0xad, + 0xca, 0xfe, 0xba, 0xbe, 0xBE, 0xDE, 0x00, 0x06, + 0x17, 0x41, 0x42, 0x73, 0xA4, 0x75, 0x26, 0x27, + 0x48, 0x22, 0x00, 0x00, 0xC8, 0x30, 0x8E, 0x46, + 0x55, 0x99, 0x63, 0x86, 0xB3, 0x95, 0xFB, 0x00, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00 + }; + uint8_t srtp_ciphertext[66] = { + 0x90, 0x0f, 0x12, 0x34, 0xde, 0xca, 0xfb, 0xad, + 0xca, 0xfe, 0xba, 0xbe, 0xBE, 0xDE, 0x00, 0x06, + 0x17, 0x58, 0x8A, 0x92, 0x70, 0xF4, 0xE1, 0x5E, + 0x1C, 0x22, 0x00, 0x00, 0xC8, 0x30, 0x95, 0x46, + 0xA9, 0x94, 0xF0, 0xBC, 0x54, 0x78, 0x97, 0x00, + 0x4e, 0x55, 0xdc, 0x4c, 0xe7, 0x99, 0x78, 0xd8, + 0x8c, 0xa4, 0xd2, 0x15, 0x94, 0x9d, 0x24, 0x02, + 0x5a, 0x46, 0xb3, 0xca, 0x35, 0xc5, 0x35, 0xa8, + 0x91, 0xc7 + }; + // clang-format on + + srtp_t srtp_snd, srtp_recv; + srtp_err_status_t status; + int len; + srtp_policy_t policy; + int headers[3] = { 1, 3, 4 }; + + /* + * create a session with a single stream using the default srtp + * policy and with the SSRC value 0xcafebabe + */ + memset(&policy, 0, sizeof(policy)); + srtp_crypto_policy_set_rtp_default(&policy.rtp); + srtp_crypto_policy_set_rtcp_default(&policy.rtcp); + policy.ssrc.type = ssrc_specific; + policy.ssrc.value = 0xcafebabe; + policy.key = test_key_ext_headers; + policy.deprecated_ekt = NULL; + policy.window_size = 128; + policy.allow_repeat_tx = 0; + policy.enc_xtn_hdr = headers; + policy.enc_xtn_hdr_count = sizeof(headers) / sizeof(headers[0]); + policy.next = NULL; + + status = srtp_create(&srtp_snd, &policy); + if (status) + return status; + + /* + * protect plaintext, then compare with ciphertext + */ + len = sizeof(srtp_plaintext_ref); + status = srtp_protect(srtp_snd, srtp_plaintext, &len); + if (status || (len != sizeof(srtp_plaintext))) + return srtp_err_status_fail; + + debug_print(mod_driver, "ciphertext:\n %s", + srtp_octet_string_hex_string(srtp_plaintext, len)); + debug_print(mod_driver, "ciphertext reference:\n %s", + srtp_octet_string_hex_string(srtp_ciphertext, len)); + + if (srtp_octet_string_is_eq(srtp_plaintext, srtp_ciphertext, len)) + return srtp_err_status_fail; + + /* + * create a receiver session context comparable to the one created + * above - we need to do this so that the replay checking doesn't + * complain + */ + status = srtp_create(&srtp_recv, &policy); + if (status) + return status; + + /* + * unprotect ciphertext, then compare with plaintext + */ + status = srtp_unprotect(srtp_recv, srtp_ciphertext, &len); + if (status) { + return status; + } else if (len != sizeof(srtp_plaintext_ref)) { + return srtp_err_status_fail; + } + + if (srtp_octet_string_is_eq(srtp_ciphertext, srtp_plaintext_ref, len)) + return srtp_err_status_fail; + + status = srtp_dealloc(srtp_snd); + if (status) + return status; + + status = srtp_dealloc(srtp_recv); + if (status) + return status; + + return srtp_err_status_ok; +} + +#ifdef GCM + +/* + * Headers of test vectors taken from RFC 6904, Appendix A + */ +srtp_err_status_t srtp_validate_encrypted_extensions_headers_gcm() +{ + // clang-format off + unsigned char test_key_ext_headers[30] = { + 0xe1, 0xf9, 0x7a, 0x0d, 0x3e, 0x01, 0x8b, 0xe0, + 0xd6, 0x4f, 0xa3, 0x2c, 0x06, 0xde, 0x41, 0x39, + 0x0e, 0xc6, 0x75, 0xad, 0x49, 0x8a, 0xfe, 0xeb, + 0xb6, 0x96, 0x0b, 0x3a, 0xab, 0xe6 + }; + uint8_t srtp_plaintext_ref[56] = { + 0x90, 0x0f, 0x12, 0x34, 0xde, 0xca, 0xfb, 0xad, + 0xca, 0xfe, 0xba, 0xbe, 0xBE, 0xDE, 0x00, 0x06, + 0x17, 0x41, 0x42, 0x73, 0xA4, 0x75, 0x26, 0x27, + 0x48, 0x22, 0x00, 0x00, 0xC8, 0x30, 0x8E, 0x46, + 0x55, 0x99, 0x63, 0x86, 0xB3, 0x95, 0xFB, 0x00, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab + }; + uint8_t srtp_plaintext[64] = { + 0x90, 0x0f, 0x12, 0x34, 0xde, 0xca, 0xfb, 0xad, + 0xca, 0xfe, 0xba, 0xbe, 0xBE, 0xDE, 0x00, 0x06, + 0x17, 0x41, 0x42, 0x73, 0xA4, 0x75, 0x26, 0x27, + 0x48, 0x22, 0x00, 0x00, 0xC8, 0x30, 0x8E, 0x46, + 0x55, 0x99, 0x63, 0x86, 0xB3, 0x95, 0xFB, 0x00, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 + }; + uint8_t srtp_ciphertext[64] = { + 0x90, 0x0f, 0x12, 0x34, 0xde, 0xca, 0xfb, 0xad, + 0xca, 0xfe, 0xba, 0xbe, 0xBE, 0xDE, 0x00, 0x06, + 0x17, 0x12, 0xe0, 0x20, 0x5b, 0xfa, 0x94, 0x9b, + 0x1C, 0x22, 0x00, 0x00, 0xC8, 0x30, 0xbb, 0x46, + 0x73, 0x27, 0x78, 0xd9, 0x92, 0x9a, 0xab, 0x00, + 0x0e, 0xca, 0x0c, 0xf9, 0x5e, 0xe9, 0x55, 0xb2, + 0x6c, 0xd3, 0xd2, 0x88, 0xb4, 0x9f, 0x6c, 0xa9, + 0xf4, 0xb1, 0xb7, 0x59, 0x71, 0x9e, 0xb5, 0xbc + }; + // clang-format on + + srtp_t srtp_snd, srtp_recv; + srtp_err_status_t status; + int len; + srtp_policy_t policy; + int headers[3] = { 1, 3, 4 }; + + /* + * create a session with a single stream using the default srtp + * policy and with the SSRC value 0xcafebabe + */ + memset(&policy, 0, sizeof(policy)); + srtp_crypto_policy_set_aes_gcm_128_8_auth(&policy.rtp); + srtp_crypto_policy_set_aes_gcm_128_8_auth(&policy.rtcp); + policy.ssrc.type = ssrc_specific; + policy.ssrc.value = 0xcafebabe; + policy.key = test_key_ext_headers; + policy.deprecated_ekt = NULL; + policy.window_size = 128; + policy.allow_repeat_tx = 0; + policy.enc_xtn_hdr = headers; + policy.enc_xtn_hdr_count = sizeof(headers) / sizeof(headers[0]); + policy.next = NULL; + + status = srtp_create(&srtp_snd, &policy); + if (status) + return status; + + /* + * protect plaintext, then compare with ciphertext + */ + len = sizeof(srtp_plaintext_ref); + status = srtp_protect(srtp_snd, srtp_plaintext, &len); + if (status || (len != sizeof(srtp_plaintext))) + return srtp_err_status_fail; + + debug_print(mod_driver, "ciphertext:\n %s", + srtp_octet_string_hex_string(srtp_plaintext, len)); + debug_print(mod_driver, "ciphertext reference:\n %s", + srtp_octet_string_hex_string(srtp_ciphertext, len)); + + if (srtp_octet_string_is_eq(srtp_plaintext, srtp_ciphertext, len)) + return srtp_err_status_fail; + + /* + * create a receiver session context comparable to the one created + * above - we need to do this so that the replay checking doesn't + * complain + */ + status = srtp_create(&srtp_recv, &policy); + if (status) + return status; + + /* + * unprotect ciphertext, then compare with plaintext + */ + status = srtp_unprotect(srtp_recv, srtp_ciphertext, &len); + if (status) { + return status; + } else if (len != sizeof(srtp_plaintext_ref)) { + return srtp_err_status_fail; + } + + if (srtp_octet_string_is_eq(srtp_ciphertext, srtp_plaintext_ref, len)) + return srtp_err_status_fail; + + status = srtp_dealloc(srtp_snd); + if (status) + return status; + + status = srtp_dealloc(srtp_recv); + if (status) + return status; + + return srtp_err_status_ok; +} +#endif + +/* + * srtp_validate_aes_256() verifies the correctness of libsrtp by comparing + * some computed packets against some pre-computed reference values. + * These packets were made with the AES-CM-256/HMAC-SHA-1-80 policy. + */ + +srtp_err_status_t srtp_validate_aes_256() +{ + // clang-format off + unsigned char aes_256_test_key[46] = { + 0xf0, 0xf0, 0x49, 0x14, 0xb5, 0x13, 0xf2, 0x76, + 0x3a, 0x1b, 0x1f, 0xa1, 0x30, 0xf1, 0x0e, 0x29, + 0x98, 0xf6, 0xf6, 0xe4, 0x3e, 0x43, 0x09, 0xd1, + 0xe6, 0x22, 0xa0, 0xe3, 0x32, 0xb9, 0xf1, 0xb6, + + 0x3b, 0x04, 0x80, 0x3d, 0xe5, 0x1e, 0xe7, 0xc9, + 0x64, 0x23, 0xab, 0x5b, 0x78, 0xd2 + }; + uint8_t srtp_plaintext_ref[28] = { + 0x80, 0x0f, 0x12, 0x34, 0xde, 0xca, 0xfb, 0xad, + 0xca, 0xfe, 0xba, 0xbe, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab + }; + uint8_t srtp_plaintext[38] = { + 0x80, 0x0f, 0x12, 0x34, 0xde, 0xca, 0xfb, 0xad, + 0xca, 0xfe, 0xba, 0xbe, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, + 0xab, 0xab, 0xab, 0xab, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 + }; + uint8_t srtp_ciphertext[38] = { + 0x80, 0x0f, 0x12, 0x34, 0xde, 0xca, 0xfb, 0xad, + 0xca, 0xfe, 0xba, 0xbe, 0xf1, 0xd9, 0xde, 0x17, + 0xff, 0x25, 0x1f, 0xf1, 0xaa, 0x00, 0x77, 0x74, + 0xb0, 0xb4, 0xb4, 0x0d, 0xa0, 0x8d, 0x9d, 0x9a, + 0x5b, 0x3a, 0x55, 0xd8, 0x87, 0x3b + }; + // clang-format on + + srtp_t srtp_snd, srtp_recv; + srtp_err_status_t status; + int len; + srtp_policy_t policy; + + /* + * create a session with a single stream using the default srtp + * policy and with the SSRC value 0xcafebabe + */ + memset(&policy, 0, sizeof(policy)); + srtp_crypto_policy_set_aes_cm_256_hmac_sha1_80(&policy.rtp); + srtp_crypto_policy_set_aes_cm_256_hmac_sha1_80(&policy.rtcp); + policy.ssrc.type = ssrc_specific; + policy.ssrc.value = 0xcafebabe; + policy.key = aes_256_test_key; + policy.deprecated_ekt = NULL; + policy.window_size = 128; + policy.allow_repeat_tx = 0; + policy.next = NULL; + + status = srtp_create(&srtp_snd, &policy); + if (status) { + return status; + } + + /* + * protect plaintext, then compare with ciphertext + */ + len = 28; + status = srtp_protect(srtp_snd, srtp_plaintext, &len); + if (status || (len != 38)) { + return srtp_err_status_fail; + } + + debug_print(mod_driver, "ciphertext:\n %s", + octet_string_hex_string(srtp_plaintext, len)); + debug_print(mod_driver, "ciphertext reference:\n %s", + octet_string_hex_string(srtp_ciphertext, len)); + + if (srtp_octet_string_is_eq(srtp_plaintext, srtp_ciphertext, len)) { + return srtp_err_status_fail; + } + + /* + * create a receiver session context comparable to the one created + * above - we need to do this so that the replay checking doesn't + * complain + */ + status = srtp_create(&srtp_recv, &policy); + if (status) { + return status; + } + + /* + * unprotect ciphertext, then compare with plaintext + */ + status = srtp_unprotect(srtp_recv, srtp_ciphertext, &len); + if (status || (len != 28)) { + return status; + } + + if (srtp_octet_string_is_eq(srtp_ciphertext, srtp_plaintext_ref, len)) { + return srtp_err_status_fail; + } + + status = srtp_dealloc(srtp_snd); + if (status) { + return status; + } + + status = srtp_dealloc(srtp_recv); + if (status) { + return status; + } + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_create_big_policy(srtp_policy_t **list) +{ + extern const srtp_policy_t *policy_array[]; + srtp_policy_t *p = NULL; + srtp_policy_t *tmp; + int i = 0; + uint32_t ssrc = 0; + + /* sanity checking */ + if ((list == NULL) || (policy_array[0] == NULL)) { + return srtp_err_status_bad_param; + } + + /* + * loop over policy list, mallocing a new list and copying values + * into it (and incrementing the SSRC value as we go along) + */ + tmp = NULL; + while (policy_array[i] != NULL) { + p = (srtp_policy_t *)malloc(sizeof(srtp_policy_t)); + if (p == NULL) { + return srtp_err_status_bad_param; + } + memcpy(p, policy_array[i], sizeof(srtp_policy_t)); + p->ssrc.type = ssrc_specific; + p->ssrc.value = ssrc++; + p->next = tmp; + tmp = p; + i++; + } + *list = p; + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_dealloc_big_policy(srtp_policy_t *list) +{ + srtp_policy_t *p, *next; + + for (p = list; p != NULL; p = next) { + next = p->next; + free(p); + } + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_test_empty_payload() +{ + srtp_t srtp_snd, srtp_recv; + srtp_err_status_t status; + int len; + srtp_policy_t policy; + srtp_hdr_t *mesg; + + /* + * create a session with a single stream using the default srtp + * policy and with the SSRC value 0xcafebabe + */ + memset(&policy, 0, sizeof(policy)); + srtp_crypto_policy_set_rtp_default(&policy.rtp); + srtp_crypto_policy_set_rtcp_default(&policy.rtcp); + policy.ssrc.type = ssrc_specific; + policy.ssrc.value = 0xcafebabe; + policy.key = test_key; + policy.deprecated_ekt = NULL; + policy.window_size = 128; + policy.allow_repeat_tx = 0; + policy.next = NULL; + + status = srtp_create(&srtp_snd, &policy); + if (status) { + return status; + } + + mesg = srtp_create_test_packet(0, policy.ssrc.value, &len); + if (mesg == NULL) { + return srtp_err_status_fail; + } + + status = srtp_protect(srtp_snd, mesg, &len); + if (status) { + return status; + } else if (len != 12 + 10) { + return srtp_err_status_fail; + } + + /* + * create a receiver session context comparable to the one created + * above - we need to do this so that the replay checking doesn't + * complain + */ + status = srtp_create(&srtp_recv, &policy); + if (status) { + return status; + } + + /* + * unprotect ciphertext, then compare with plaintext + */ + status = srtp_unprotect(srtp_recv, mesg, &len); + if (status) { + return status; + } else if (len != 12) { + return srtp_err_status_fail; + } + + status = srtp_dealloc(srtp_snd); + if (status) { + return status; + } + + status = srtp_dealloc(srtp_recv); + if (status) { + return status; + } + + free(mesg); + + return srtp_err_status_ok; +} + +#ifdef GCM +srtp_err_status_t srtp_test_empty_payload_gcm() +{ + srtp_t srtp_snd, srtp_recv; + srtp_err_status_t status; + int len; + srtp_policy_t policy; + srtp_hdr_t *mesg; + + /* + * create a session with a single stream using the default srtp + * policy and with the SSRC value 0xcafebabe + */ + memset(&policy, 0, sizeof(policy)); + srtp_crypto_policy_set_aes_gcm_128_8_auth(&policy.rtp); + srtp_crypto_policy_set_aes_gcm_128_8_auth(&policy.rtcp); + policy.ssrc.type = ssrc_specific; + policy.ssrc.value = 0xcafebabe; + policy.key = test_key; + policy.deprecated_ekt = NULL; + policy.window_size = 128; + policy.allow_repeat_tx = 0; + policy.next = NULL; + + status = srtp_create(&srtp_snd, &policy); + if (status) { + return status; + } + + mesg = srtp_create_test_packet(0, policy.ssrc.value, &len); + if (mesg == NULL) { + return srtp_err_status_fail; + } + + status = srtp_protect(srtp_snd, mesg, &len); + if (status) { + return status; + } else if (len != 12 + 8) { + return srtp_err_status_fail; + } + + /* + * create a receiver session context comparable to the one created + * above - we need to do this so that the replay checking doesn't + * complain + */ + status = srtp_create(&srtp_recv, &policy); + if (status) { + return status; + } + + /* + * unprotect ciphertext, then compare with plaintext + */ + status = srtp_unprotect(srtp_recv, mesg, &len); + if (status) { + return status; + } else if (len != 12) { + return srtp_err_status_fail; + } + + status = srtp_dealloc(srtp_snd); + if (status) { + return status; + } + + status = srtp_dealloc(srtp_recv); + if (status) { + return status; + } + + free(mesg); + + return srtp_err_status_ok; +} +#endif // GCM + +srtp_err_status_t srtp_test_remove_stream() +{ + srtp_err_status_t status; + srtp_policy_t *policy_list, policy; + srtp_t session; + srtp_stream_t stream; + + /* + * srtp_get_stream() is a libSRTP internal function that we declare + * here so that we can use it to verify the correct operation of the + * library + */ + extern srtp_stream_t srtp_get_stream(srtp_t srtp, uint32_t ssrc); + + status = srtp_create_big_policy(&policy_list); + if (status) { + return status; + } + + status = srtp_create(&session, policy_list); + if (status) { + return status; + } + + /* + * check for false positives by trying to remove a stream that's not + * in the session + */ + status = srtp_remove_stream(session, htonl(0xaaaaaaaa)); + if (status != srtp_err_status_no_ctx) { + return srtp_err_status_fail; + } + + /* + * check for false negatives by removing stream 0x1, then + * searching for streams 0x0 and 0x2 + */ + status = srtp_remove_stream(session, htonl(0x1)); + if (status != srtp_err_status_ok) { + return srtp_err_status_fail; + } + stream = srtp_get_stream(session, htonl(0x0)); + if (stream == NULL) { + return srtp_err_status_fail; + } + stream = srtp_get_stream(session, htonl(0x2)); + if (stream == NULL) { + return srtp_err_status_fail; + } + + status = srtp_dealloc(session); + if (status != srtp_err_status_ok) { + return status; + } + + status = srtp_dealloc_big_policy(policy_list); + if (status != srtp_err_status_ok) { + return status; + } + + /* Now test adding and removing a single stream */ + memset(&policy, 0, sizeof(policy)); + srtp_crypto_policy_set_rtp_default(&policy.rtp); + srtp_crypto_policy_set_rtcp_default(&policy.rtcp); + policy.ssrc.type = ssrc_specific; + policy.ssrc.value = 0xcafebabe; + policy.key = test_key; + policy.deprecated_ekt = NULL; + policy.window_size = 128; + policy.allow_repeat_tx = 0; + policy.next = NULL; + + status = srtp_create(&session, NULL); + if (status != srtp_err_status_ok) { + return status; + } + + status = srtp_add_stream(session, &policy); + if (status != srtp_err_status_ok) { + return status; + } + + status = srtp_remove_stream(session, htonl(0xcafebabe)); + if (status != srtp_err_status_ok) { + return status; + } + + status = srtp_dealloc(session); + if (status != srtp_err_status_ok) { + return status; + } + + return srtp_err_status_ok; +} + +// clang-format off +unsigned char test_alt_key[46] = { + 0xe5, 0x19, 0x6f, 0x01, 0x5e, 0xf1, 0x9b, 0xe1, + 0xd7, 0x47, 0xa7, 0x27, 0x07, 0xd7, 0x47, 0x33, + 0x01, 0xc2, 0x35, 0x4d, 0x59, 0x6a, 0xf7, 0x84, + 0x96, 0x98, 0xeb, 0xaa, 0xac, 0xf6, 0xa1, 0x45, + 0xc7, 0x15, 0xe2, 0xea, 0xfe, 0x55, 0x67, 0x96, + 0xb6, 0x96, 0x0b, 0x3a, 0xab, 0xe6 +}; +// clang-format on + +/* + * srtp_test_update() verifies updating/rekeying exsisting streams. + * As stated in https://tools.ietf.org/html/rfc3711#section-3.3.1 + * the value of the ROC must not be reset after a rekey, this test + * atempts to prove that srtp_update does not reset the ROC. + */ + +srtp_err_status_t srtp_test_update() +{ + srtp_err_status_t status; + uint32_t ssrc = 0x12121212; + int msg_len_octets = 32; + int protected_msg_len_octets; + srtp_hdr_t *msg; + srtp_t srtp_snd, srtp_recv; + srtp_policy_t policy; + + memset(&policy, 0, sizeof(policy)); + srtp_crypto_policy_set_rtp_default(&policy.rtp); + srtp_crypto_policy_set_rtcp_default(&policy.rtcp); + policy.deprecated_ekt = NULL; + policy.window_size = 128; + policy.allow_repeat_tx = 0; + policy.next = NULL; + policy.ssrc.type = ssrc_any_outbound; + policy.key = test_key; + + /* create a send and recive ctx with defualt profile and test_key */ + status = srtp_create(&srtp_recv, &policy); + if (status) + return status; + + policy.ssrc.type = ssrc_any_inbound; + status = srtp_create(&srtp_snd, &policy); + if (status) + return status; + + /* protect and unprotect two msg's that will cause the ROC to be equal to 1 + */ + msg = srtp_create_test_packet(msg_len_octets, ssrc, + &protected_msg_len_octets); + if (msg == NULL) + return srtp_err_status_alloc_fail; + msg->seq = htons(65535); + + status = srtp_protect(srtp_snd, msg, &protected_msg_len_octets); + if (status) + return srtp_err_status_fail; + + status = srtp_unprotect(srtp_recv, msg, &protected_msg_len_octets); + if (status) + return status; + + free(msg); + + msg = srtp_create_test_packet(msg_len_octets, ssrc, + &protected_msg_len_octets); + if (msg == NULL) + return srtp_err_status_alloc_fail; + msg->seq = htons(1); + + status = srtp_protect(srtp_snd, msg, &protected_msg_len_octets); + if (status) + return srtp_err_status_fail; + + status = srtp_unprotect(srtp_recv, msg, &protected_msg_len_octets); + if (status) + return status; + + free(msg); + + /* update send ctx with same test_key t verify update works*/ + policy.ssrc.type = ssrc_any_outbound; + policy.key = test_key; + status = srtp_update(srtp_snd, &policy); + if (status) + return status; + + msg = srtp_create_test_packet(msg_len_octets, ssrc, + &protected_msg_len_octets); + if (msg == NULL) + return srtp_err_status_alloc_fail; + msg->seq = htons(2); + + status = srtp_protect(srtp_snd, msg, &protected_msg_len_octets); + if (status) + return srtp_err_status_fail; + + status = srtp_unprotect(srtp_recv, msg, &protected_msg_len_octets); + if (status) + return status; + + free(msg); + + /* update send ctx to use test_alt_key */ + policy.ssrc.type = ssrc_any_outbound; + policy.key = test_alt_key; + status = srtp_update(srtp_snd, &policy); + if (status) + return status; + + /* create and protect msg with new key and ROC still equal to 1 */ + msg = srtp_create_test_packet(msg_len_octets, ssrc, + &protected_msg_len_octets); + if (msg == NULL) + return srtp_err_status_alloc_fail; + msg->seq = htons(3); + + status = srtp_protect(srtp_snd, msg, &protected_msg_len_octets); + if (status) + return srtp_err_status_fail; + + /* verify that recive ctx will fail to unprotect as it still uses test_key + */ + status = srtp_unprotect(srtp_recv, msg, &protected_msg_len_octets); + if (status == srtp_err_status_ok) + return srtp_err_status_fail; + + /* create a new recvieve ctx with test_alt_key but since it is new it will + * have ROC equal to 1 + * and therefore should fail to unprotected */ + { + srtp_t srtp_recv_roc_0; + + policy.ssrc.type = ssrc_any_inbound; + policy.key = test_alt_key; + status = srtp_create(&srtp_recv_roc_0, &policy); + if (status) + return status; + + status = + srtp_unprotect(srtp_recv_roc_0, msg, &protected_msg_len_octets); + if (status == srtp_err_status_ok) + return srtp_err_status_fail; + + status = srtp_dealloc(srtp_recv_roc_0); + if (status) + return status; + } + + /* update recive ctx to use test_alt_key */ + policy.ssrc.type = ssrc_any_inbound; + policy.key = test_alt_key; + status = srtp_update(srtp_recv, &policy); + if (status) + return status; + + /* verify that can still unprotect, therfore key is updated and ROC value is + * preserved */ + status = srtp_unprotect(srtp_recv, msg, &protected_msg_len_octets); + if (status) + return status; + + free(msg); + + status = srtp_dealloc(srtp_snd); + if (status) + return status; + + status = srtp_dealloc(srtp_recv); + if (status) + return status; + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_test_setup_protect_trailer_streams( + srtp_t *srtp_send, + srtp_t *srtp_send_mki, + srtp_t *srtp_send_aes_gcm, + srtp_t *srtp_send_aes_gcm_mki) +{ + srtp_err_status_t status; + srtp_policy_t policy; + srtp_policy_t policy_mki; + +#ifdef GCM + srtp_policy_t policy_aes_gcm; + srtp_policy_t policy_aes_gcm_mki; +#endif // GCM + + memset(&policy, 0, sizeof(policy)); + srtp_crypto_policy_set_rtp_default(&policy.rtp); + srtp_crypto_policy_set_rtcp_default(&policy.rtcp); + policy.deprecated_ekt = NULL; + policy.window_size = 128; + policy.allow_repeat_tx = 0; + policy.next = NULL; + policy.ssrc.type = ssrc_any_outbound; + policy.key = test_key; + + memset(&policy_mki, 0, sizeof(policy_mki)); + srtp_crypto_policy_set_rtp_default(&policy_mki.rtp); + srtp_crypto_policy_set_rtcp_default(&policy_mki.rtcp); + policy_mki.deprecated_ekt = NULL; + policy_mki.window_size = 128; + policy_mki.allow_repeat_tx = 0; + policy_mki.next = NULL; + policy_mki.ssrc.type = ssrc_any_outbound; + policy_mki.key = NULL; + policy_mki.keys = test_keys; + policy_mki.num_master_keys = 2; + +#ifdef GCM + memset(&policy_aes_gcm, 0, sizeof(policy_aes_gcm)); + srtp_crypto_policy_set_aes_gcm_128_16_auth(&policy_aes_gcm.rtp); + srtp_crypto_policy_set_aes_gcm_128_16_auth(&policy_aes_gcm.rtcp); + policy_aes_gcm.deprecated_ekt = NULL; + policy_aes_gcm.window_size = 128; + policy_aes_gcm.allow_repeat_tx = 0; + policy_aes_gcm.next = NULL; + policy_aes_gcm.ssrc.type = ssrc_any_outbound; + policy_aes_gcm.key = test_key; + + memset(&policy_aes_gcm_mki, 0, sizeof(policy_aes_gcm_mki)); + srtp_crypto_policy_set_aes_gcm_128_16_auth(&policy_aes_gcm_mki.rtp); + srtp_crypto_policy_set_aes_gcm_128_16_auth(&policy_aes_gcm_mki.rtcp); + policy_aes_gcm_mki.deprecated_ekt = NULL; + policy_aes_gcm_mki.window_size = 128; + policy_aes_gcm_mki.allow_repeat_tx = 0; + policy_aes_gcm_mki.next = NULL; + policy_aes_gcm_mki.ssrc.type = ssrc_any_outbound; + policy_aes_gcm_mki.key = NULL; + policy_aes_gcm_mki.keys = test_keys; + policy_aes_gcm_mki.num_master_keys = 2; +#endif // GCM + + /* create a send ctx with defualt profile and test_key */ + status = srtp_create(srtp_send, &policy); + if (status) + return status; + + status = srtp_create(srtp_send_mki, &policy_mki); + if (status) + return status; + +#ifdef GCM + status = srtp_create(srtp_send_aes_gcm, &policy_aes_gcm); + if (status) + return status; + + status = srtp_create(srtp_send_aes_gcm_mki, &policy_aes_gcm_mki); + if (status) + return status; +#endif // GCM + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_test_protect_trailer_length() +{ + srtp_t srtp_send; + srtp_t srtp_send_mki; + srtp_t srtp_send_aes_gcm; + srtp_t srtp_send_aes_gcm_mki; + uint32_t length = 0; + srtp_err_status_t status; + + srtp_test_setup_protect_trailer_streams( + &srtp_send, &srtp_send_mki, &srtp_send_aes_gcm, &srtp_send_aes_gcm_mki); + + status = srtp_get_protect_trailer_length(srtp_send, 0, 0, &length); + if (status) + return status; + + /* TAG Length: 10 bytes */ + if (length != 10) + return srtp_err_status_fail; + + status = srtp_get_protect_trailer_length(srtp_send_mki, 1, 1, &length); + if (status) + return status; + + /* TAG Length: 10 bytes + MKI length: 4 bytes*/ + if (length != 14) + return srtp_err_status_fail; + +#ifdef GCM + status = srtp_get_protect_trailer_length(srtp_send_aes_gcm, 0, 0, &length); + if (status) + return status; + + /* TAG Length: 16 bytes */ + if (length != 16) + return srtp_err_status_fail; + + status = + srtp_get_protect_trailer_length(srtp_send_aes_gcm_mki, 1, 1, &length); + if (status) + return status; + + /* TAG Length: 16 bytes + MKI length: 4 bytes*/ + if (length != 20) + return srtp_err_status_fail; +#endif // GCM + + srtp_dealloc(srtp_send); + srtp_dealloc(srtp_send_mki); +#ifdef GCM + srtp_dealloc(srtp_send_aes_gcm); + srtp_dealloc(srtp_send_aes_gcm_mki); +#endif + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_test_protect_rtcp_trailer_length() +{ + srtp_t srtp_send; + srtp_t srtp_send_mki; + srtp_t srtp_send_aes_gcm; + srtp_t srtp_send_aes_gcm_mki; + uint32_t length = 0; + srtp_err_status_t status; + + srtp_test_setup_protect_trailer_streams( + &srtp_send, &srtp_send_mki, &srtp_send_aes_gcm, &srtp_send_aes_gcm_mki); + + status = srtp_get_protect_rtcp_trailer_length(srtp_send, 0, 0, &length); + if (status) + return status; + + /* TAG Length: 10 bytes + SRTCP Trailer 4 bytes*/ + if (length != 14) + return srtp_err_status_fail; + + status = srtp_get_protect_rtcp_trailer_length(srtp_send_mki, 1, 1, &length); + if (status) + return status; + + /* TAG Length: 10 bytes + SRTCP Trailer 4 bytes + MKI 4 bytes*/ + if (length != 18) + return srtp_err_status_fail; + +#ifdef GCM + status = + srtp_get_protect_rtcp_trailer_length(srtp_send_aes_gcm, 0, 0, &length); + if (status) + return status; + + /* TAG Length: 16 bytes + SRTCP Trailer 4 bytes*/ + if (length != 20) + return srtp_err_status_fail; + + status = srtp_get_protect_rtcp_trailer_length(srtp_send_aes_gcm_mki, 1, 1, + &length); + if (status) + return status; + + /* TAG Length: 16 bytes + SRTCP Trailer 4 bytes + MKI 4 bytes*/ + if (length != 24) + return srtp_err_status_fail; +#endif // GCM + + srtp_dealloc(srtp_send); + srtp_dealloc(srtp_send_mki); +#ifdef GCM + srtp_dealloc(srtp_send_aes_gcm); + srtp_dealloc(srtp_send_aes_gcm_mki); +#endif + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_test_get_roc() +{ + srtp_err_status_t status; + srtp_policy_t policy; + srtp_t session; + srtp_hdr_t *pkt; + uint32_t i; + uint32_t roc; + uint32_t ts; + uint16_t seq; + + int msg_len_octets = 32; + int protected_msg_len_octets; + + memset(&policy, 0, sizeof(policy)); + srtp_crypto_policy_set_rtp_default(&policy.rtp); + srtp_crypto_policy_set_rtcp_default(&policy.rtcp); + policy.ssrc.type = ssrc_specific; + policy.ssrc.value = 0xcafebabe; + policy.key = test_key; + policy.window_size = 128; + + /* Create a sender session */ + status = srtp_create(&session, &policy); + if (status) { + return status; + } + + /* Set start sequence so we roll over */ + seq = 65535; + ts = 0; + + for (i = 0; i < 2; i++) { + pkt = srtp_create_test_packet_extended(msg_len_octets, + policy.ssrc.value, seq, ts, + &protected_msg_len_octets); + status = srtp_protect(session, pkt, &protected_msg_len_octets); + free(pkt); + if (status) { + return status; + } + + status = srtp_get_stream_roc(session, policy.ssrc.value, &roc); + if (status) { + return status; + } + + if (roc != i) { + return srtp_err_status_fail; + } + + seq++; + ts++; + } + + /* Cleanup */ + status = srtp_dealloc(session); + if (status) { + return status; + } + + return srtp_err_status_ok; +} + +static srtp_err_status_t test_set_receiver_roc(uint32_t packets, + uint32_t roc_to_set) +{ + srtp_err_status_t status; + + srtp_policy_t sender_policy; + srtp_t sender_session; + + srtp_policy_t receiver_policy; + srtp_t receiver_session; + + srtp_hdr_t *pkt_1; + unsigned char *recv_pkt_1; + + srtp_hdr_t *pkt_2; + unsigned char *recv_pkt_2; + + uint32_t i; + uint32_t ts; + uint16_t seq; + + int msg_len_octets = 32; + int protected_msg_len_octets_1; + int protected_msg_len_octets_2; + + /* Create sender */ + memset(&sender_policy, 0, sizeof(sender_policy)); + srtp_crypto_policy_set_rtp_default(&sender_policy.rtp); + srtp_crypto_policy_set_rtcp_default(&sender_policy.rtcp); + sender_policy.ssrc.type = ssrc_specific; + sender_policy.ssrc.value = 0xcafebabe; + sender_policy.key = test_key; + sender_policy.window_size = 128; + + status = srtp_create(&sender_session, &sender_policy); + if (status) { + return status; + } + + /* Create and protect packets */ + seq = 0; + ts = 0; + for (i = 0; i < packets; i++) { + srtp_hdr_t *tmp_pkt; + int tmp_len; + + tmp_pkt = srtp_create_test_packet_extended( + msg_len_octets, sender_policy.ssrc.value, seq, ts, &tmp_len); + status = srtp_protect(sender_session, tmp_pkt, &tmp_len); + free(tmp_pkt); + if (status) { + return status; + } + + seq++; + ts++; + } + + /* Create the first packet to decrypt and test for ROC change */ + pkt_1 = srtp_create_test_packet_extended(msg_len_octets, + sender_policy.ssrc.value, seq, ts, + &protected_msg_len_octets_1); + status = srtp_protect(sender_session, pkt_1, &protected_msg_len_octets_1); + if (status) { + return status; + } + + /* Create the second packet to decrypt and test for ROC change */ + seq++; + ts++; + pkt_2 = srtp_create_test_packet_extended(msg_len_octets, + sender_policy.ssrc.value, seq, ts, + &protected_msg_len_octets_2); + status = srtp_protect(sender_session, pkt_2, &protected_msg_len_octets_2); + if (status) { + return status; + } + + /* Create the receiver */ + memset(&receiver_policy, 0, sizeof(receiver_policy)); + srtp_crypto_policy_set_rtp_default(&receiver_policy.rtp); + srtp_crypto_policy_set_rtcp_default(&receiver_policy.rtcp); + receiver_policy.ssrc.type = ssrc_specific; + receiver_policy.ssrc.value = sender_policy.ssrc.value; + receiver_policy.key = test_key; + receiver_policy.window_size = 128; + + status = srtp_create(&receiver_session, &receiver_policy); + if (status) { + return status; + } + + /* Make a copy of the first sent protected packet */ + recv_pkt_1 = malloc(protected_msg_len_octets_1); + if (recv_pkt_1 == NULL) { + return srtp_err_status_fail; + } + memcpy(recv_pkt_1, pkt_1, protected_msg_len_octets_1); + + /* Make a copy of the second sent protected packet */ + recv_pkt_2 = malloc(protected_msg_len_octets_2); + if (recv_pkt_2 == NULL) { + return srtp_err_status_fail; + } + memcpy(recv_pkt_2, pkt_2, protected_msg_len_octets_2); + + /* Set the ROC to the wanted value */ + status = srtp_set_stream_roc(receiver_session, receiver_policy.ssrc.value, + roc_to_set); + if (status) { + return status; + } + + /* Unprotect the first packet */ + status = srtp_unprotect(receiver_session, recv_pkt_1, + &protected_msg_len_octets_1); + if (status) { + return status; + } + + /* Unprotect the second packet */ + status = srtp_unprotect(receiver_session, recv_pkt_2, + &protected_msg_len_octets_2); + if (status) { + return status; + } + + /* Cleanup */ + status = srtp_dealloc(sender_session); + if (status) { + return status; + } + + status = srtp_dealloc(receiver_session); + if (status) { + return status; + } + + free(pkt_1); + free(recv_pkt_1); + free(pkt_2); + free(recv_pkt_2); + + return srtp_err_status_ok; +} + +static srtp_err_status_t test_set_sender_roc(uint16_t seq, uint32_t roc_to_set) +{ + srtp_err_status_t status; + + srtp_policy_t sender_policy; + srtp_t sender_session; + + srtp_policy_t receiver_policy; + srtp_t receiver_session; + + srtp_hdr_t *pkt; + unsigned char *recv_pkt; + + uint32_t ts; + + int msg_len_octets = 32; + int protected_msg_len_octets; + + /* Create sender */ + memset(&sender_policy, 0, sizeof(sender_policy)); + srtp_crypto_policy_set_rtp_default(&sender_policy.rtp); + srtp_crypto_policy_set_rtcp_default(&sender_policy.rtcp); + sender_policy.ssrc.type = ssrc_specific; + sender_policy.ssrc.value = 0xcafebabe; + sender_policy.key = test_key; + sender_policy.window_size = 128; + + status = srtp_create(&sender_session, &sender_policy); + if (status) { + return status; + } + + /* Set the ROC before encrypting the first packet */ + status = srtp_set_stream_roc(sender_session, sender_policy.ssrc.value, + roc_to_set); + if (status != srtp_err_status_ok) { + return status; + } + + /* Create the packet to decrypt */ + ts = 0; + pkt = srtp_create_test_packet_extended(msg_len_octets, + sender_policy.ssrc.value, seq, ts, + &protected_msg_len_octets); + status = srtp_protect(sender_session, pkt, &protected_msg_len_octets); + if (status) { + return status; + } + + /* Create the receiver */ + memset(&receiver_policy, 0, sizeof(receiver_policy)); + srtp_crypto_policy_set_rtp_default(&receiver_policy.rtp); + srtp_crypto_policy_set_rtcp_default(&receiver_policy.rtcp); + receiver_policy.ssrc.type = ssrc_specific; + receiver_policy.ssrc.value = sender_policy.ssrc.value; + receiver_policy.key = test_key; + receiver_policy.window_size = 128; + + status = srtp_create(&receiver_session, &receiver_policy); + if (status) { + return status; + } + + /* Make a copy of the sent protected packet */ + recv_pkt = malloc(protected_msg_len_octets); + if (recv_pkt == NULL) { + return srtp_err_status_fail; + } + memcpy(recv_pkt, pkt, protected_msg_len_octets); + + /* Set the ROC to the wanted value */ + status = srtp_set_stream_roc(receiver_session, receiver_policy.ssrc.value, + roc_to_set); + if (status) { + return status; + } + + status = + srtp_unprotect(receiver_session, recv_pkt, &protected_msg_len_octets); + if (status) { + return status; + } + + /* Cleanup */ + status = srtp_dealloc(sender_session); + if (status) { + return status; + } + + status = srtp_dealloc(receiver_session); + if (status) { + return status; + } + + free(pkt); + free(recv_pkt); + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_test_set_receiver_roc() +{ + int packets; + uint32_t roc; + srtp_err_status_t status; + + /* First test does not rollover */ + packets = 1; + roc = 0; + + status = test_set_receiver_roc(packets - 1, roc); + if (status) { + return status; + } + + status = test_set_receiver_roc(packets, roc); + if (status) { + return status; + } + + status = test_set_receiver_roc(packets + 1, roc); + if (status) { + return status; + } + + status = test_set_receiver_roc(packets + 60000, roc); + if (status) { + return status; + } + + /* Second test should rollover */ + packets = 65535; + roc = 0; + + status = test_set_receiver_roc(packets - 1, roc); + if (status) { + return status; + } + + status = test_set_receiver_roc(packets, roc); + if (status) { + return status; + } + + /* Now the rollover counter should be 1 */ + roc = 1; + status = test_set_receiver_roc(packets + 1, roc); + if (status) { + return status; + } + + status = test_set_receiver_roc(packets + 60000, roc); + if (status) { + return status; + } + + return srtp_err_status_ok; +} + +srtp_err_status_t srtp_test_set_sender_roc() +{ + uint32_t roc; + uint16_t seq; + srtp_err_status_t status; + + seq = 43210; + roc = 0; + status = test_set_sender_roc(seq, roc); + if (status) { + return status; + } + + roc = 65535; + status = test_set_sender_roc(seq, roc); + if (status) { + return status; + } + + roc = 0xffff; + status = test_set_sender_roc(seq, roc); + if (status) { + return status; + } + + roc = 0xffff00; + status = test_set_sender_roc(seq, roc); + if (status) { + return status; + } + + roc = 0xfffffff0; + status = test_set_sender_roc(seq, roc); + if (status) { + return status; + } + + return srtp_err_status_ok; +} + +/* + * srtp policy definitions - these definitions are used above + */ + +// clang-format off +unsigned char test_key[46] = { + 0xe1, 0xf9, 0x7a, 0x0d, 0x3e, 0x01, 0x8b, 0xe0, + 0xd6, 0x4f, 0xa3, 0x2c, 0x06, 0xde, 0x41, 0x39, + 0x0e, 0xc6, 0x75, 0xad, 0x49, 0x8a, 0xfe, 0xeb, + 0xb6, 0x96, 0x0b, 0x3a, 0xab, 0xe6, 0xc1, 0x73, + 0xc3, 0x17, 0xf2, 0xda, 0xbe, 0x35, 0x77, 0x93, + 0xb6, 0x96, 0x0b, 0x3a, 0xab, 0xe6 +}; + +unsigned char test_key_2[46] = { + 0xf0, 0xf0, 0x49, 0x14, 0xb5, 0x13, 0xf2, 0x76, + 0x3a, 0x1b, 0x1f, 0xa1, 0x30, 0xf1, 0x0e, 0x29, + 0x98, 0xf6, 0xf6, 0xe4, 0x3e, 0x43, 0x09, 0xd1, + 0xe6, 0x22, 0xa0, 0xe3, 0x32, 0xb9, 0xf1, 0xb6, + 0xc3, 0x17, 0xf2, 0xda, 0xbe, 0x35, 0x77, 0x93, + 0xb6, 0x96, 0x0b, 0x3a, 0xab, 0xe6 +}; + +unsigned char test_mki_id[TEST_MKI_ID_SIZE] = { + 0xe1, 0xf9, 0x7a, 0x0d +}; + +unsigned char test_mki_id_2[TEST_MKI_ID_SIZE] = { + 0xf3, 0xa1, 0x46, 0x71 +}; +// clang-format on + +const srtp_policy_t default_policy = { + { ssrc_any_outbound, 0 }, /* SSRC */ + { + /* SRTP policy */ + SRTP_AES_ICM_128, /* cipher type */ + SRTP_AES_ICM_128_KEY_LEN_WSALT, /* cipher key length in octets */ + SRTP_HMAC_SHA1, /* authentication func type */ + 16, /* auth key length in octets */ + 10, /* auth tag length in octets */ + sec_serv_conf_and_auth /* security services flag */ + }, + { + /* SRTCP policy */ + SRTP_AES_ICM_128, /* cipher type */ + SRTP_AES_ICM_128_KEY_LEN_WSALT, /* cipher key length in octets */ + SRTP_HMAC_SHA1, /* authentication func type */ + 16, /* auth key length in octets */ + 10, /* auth tag length in octets */ + sec_serv_conf_and_auth /* security services flag */ + }, + NULL, + (srtp_master_key_t **)test_keys, + 2, /* indicates the number of Master keys */ + NULL, /* indicates that EKT is not in use */ + 128, /* replay window size */ + 0, /* retransmission not allowed */ + NULL, /* no encrypted extension headers */ + 0, /* list of encrypted extension headers is empty */ + NULL +}; + +const srtp_policy_t aes_only_policy = { + { ssrc_any_outbound, 0 }, /* SSRC */ + { + SRTP_AES_ICM_128, /* cipher type */ + SRTP_AES_ICM_128_KEY_LEN_WSALT, /* cipher key length in octets */ + SRTP_NULL_AUTH, /* authentication func type */ + 0, /* auth key length in octets */ + 0, /* auth tag length in octets */ + sec_serv_conf /* security services flag */ + }, + { + SRTP_AES_ICM_128, /* cipher type */ + SRTP_AES_ICM_128_KEY_LEN_WSALT, /* cipher key length in octets */ + SRTP_NULL_AUTH, /* authentication func type */ + 0, /* auth key length in octets */ + 0, /* auth tag length in octets */ + sec_serv_conf /* security services flag */ + }, + NULL, + (srtp_master_key_t **)test_keys, + 2, /* indicates the number of Master keys */ + NULL, /* indicates that EKT is not in use */ + 128, /* replay window size */ + 0, /* retransmission not allowed */ + NULL, /* no encrypted extension headers */ + 0, /* list of encrypted extension headers is empty */ + NULL +}; + +const srtp_policy_t hmac_only_policy = { + { ssrc_any_outbound, 0 }, /* SSRC */ + { + SRTP_NULL_CIPHER, /* cipher type */ + 0, /* cipher key length in octets */ + SRTP_HMAC_SHA1, /* authentication func type */ + 20, /* auth key length in octets */ + 4, /* auth tag length in octets */ + sec_serv_auth /* security services flag */ + }, + { + SRTP_NULL_CIPHER, /* cipher type */ + 0, /* cipher key length in octets */ + SRTP_HMAC_SHA1, /* authentication func type */ + 20, /* auth key length in octets */ + 4, /* auth tag length in octets */ + sec_serv_auth /* security services flag */ + }, + NULL, + (srtp_master_key_t **)test_keys, + 2, /* Number of Master keys associated with the policy */ + NULL, /* indicates that EKT is not in use */ + 128, /* replay window size */ + 0, /* retransmission not allowed */ + NULL, /* no encrypted extension headers */ + 0, /* list of encrypted extension headers is empty */ + NULL +}; + +#ifdef GCM +const srtp_policy_t aes128_gcm_8_policy = { + { ssrc_any_outbound, 0 }, /* SSRC */ + { + /* SRTP policy */ + SRTP_AES_GCM_128, /* cipher type */ + SRTP_AES_GCM_128_KEY_LEN_WSALT, /* cipher key length in octets */ + SRTP_NULL_AUTH, /* authentication func type */ + 0, /* auth key length in octets */ + 8, /* auth tag length in octets */ + sec_serv_conf_and_auth /* security services flag */ + }, + { + /* SRTCP policy */ + SRTP_AES_GCM_128, /* cipher type */ + SRTP_AES_GCM_128_KEY_LEN_WSALT, /* cipher key length in octets */ + SRTP_NULL_AUTH, /* authentication func type */ + 0, /* auth key length in octets */ + 8, /* auth tag length in octets */ + sec_serv_conf_and_auth /* security services flag */ + }, + NULL, + (srtp_master_key_t **)test_keys, + 2, /* indicates the number of Master keys */ + NULL, /* indicates that EKT is not in use */ + 128, /* replay window size */ + 0, /* retransmission not allowed */ + NULL, /* no encrypted extension headers */ + 0, /* list of encrypted extension headers is empty */ + NULL +}; + +const srtp_policy_t aes128_gcm_8_cauth_policy = { + { ssrc_any_outbound, 0 }, /* SSRC */ + { + /* SRTP policy */ + SRTP_AES_GCM_128, /* cipher type */ + SRTP_AES_GCM_128_KEY_LEN_WSALT, /* cipher key length in octets */ + SRTP_NULL_AUTH, /* authentication func type */ + 0, /* auth key length in octets */ + 8, /* auth tag length in octets */ + sec_serv_conf_and_auth /* security services flag */ + }, + { + /* SRTCP policy */ + SRTP_AES_GCM_128, /* cipher type */ + SRTP_AES_GCM_128_KEY_LEN_WSALT, /* cipher key length in octets */ + SRTP_NULL_AUTH, /* authentication func type */ + 0, /* auth key length in octets */ + 8, /* auth tag length in octets */ + sec_serv_auth /* security services flag */ + }, + NULL, + (srtp_master_key_t **)test_keys, + 2, /* indicates the number of Master keys */ + NULL, /* indicates that EKT is not in use */ + 128, /* replay window size */ + 0, /* retransmission not allowed */ + NULL, /* no encrypted extension headers */ + 0, /* list of encrypted extension headers is empty */ + NULL +}; + +const srtp_policy_t aes256_gcm_8_policy = { + { ssrc_any_outbound, 0 }, /* SSRC */ + { + /* SRTP policy */ + SRTP_AES_GCM_256, /* cipher type */ + SRTP_AES_GCM_256_KEY_LEN_WSALT, /* cipher key length in octets */ + SRTP_NULL_AUTH, /* authentication func type */ + 0, /* auth key length in octets */ + 8, /* auth tag length in octets */ + sec_serv_conf_and_auth /* security services flag */ + }, + { + /* SRTCP policy */ + SRTP_AES_GCM_256, /* cipher type */ + SRTP_AES_GCM_256_KEY_LEN_WSALT, /* cipher key length in octets */ + SRTP_NULL_AUTH, /* authentication func type */ + 0, /* auth key length in octets */ + 8, /* auth tag length in octets */ + sec_serv_conf_and_auth /* security services flag */ + }, + NULL, + (srtp_master_key_t **)test_keys, + 2, /* indicates the number of Master keys */ + NULL, /* indicates that EKT is not in use */ + 128, /* replay window size */ + 0, /* retransmission not allowed */ + NULL, /* no encrypted extension headers */ + 0, /* list of encrypted extension headers is empty */ + NULL +}; + +const srtp_policy_t aes256_gcm_8_cauth_policy = { + { ssrc_any_outbound, 0 }, /* SSRC */ + { + /* SRTP policy */ + SRTP_AES_GCM_256, /* cipher type */ + SRTP_AES_GCM_256_KEY_LEN_WSALT, /* cipher key length in octets */ + SRTP_NULL_AUTH, /* authentication func type */ + 0, /* auth key length in octets */ + 8, /* auth tag length in octets */ + sec_serv_conf_and_auth /* security services flag */ + }, + { + /* SRTCP policy */ + SRTP_AES_GCM_256, /* cipher type */ + SRTP_AES_GCM_256_KEY_LEN_WSALT, /* cipher key length in octets */ + SRTP_NULL_AUTH, /* authentication func type */ + 0, /* auth key length in octets */ + 8, /* auth tag length in octets */ + sec_serv_auth /* security services flag */ + }, + NULL, + (srtp_master_key_t **)test_keys, + 2, /* indicates the number of Master keys */ + NULL, /* indicates that EKT is not in use */ + 128, /* replay window size */ + 0, /* retransmission not allowed */ + NULL, /* no encrypted extension headers */ + 0, /* list of encrypted extension headers is empty */ + NULL +}; +#endif + +const srtp_policy_t null_policy = { + { ssrc_any_outbound, 0 }, /* SSRC */ + { + SRTP_NULL_CIPHER, /* cipher type */ + 0, /* cipher key length in octets */ + SRTP_NULL_AUTH, /* authentication func type */ + 0, /* auth key length in octets */ + 0, /* auth tag length in octets */ + sec_serv_none /* security services flag */ + }, + { + SRTP_NULL_CIPHER, /* cipher type */ + 0, /* cipher key length in octets */ + SRTP_NULL_AUTH, /* authentication func type */ + 0, /* auth key length in octets */ + 0, /* auth tag length in octets */ + sec_serv_none /* security services flag */ + }, + NULL, + (srtp_master_key_t **)test_keys, + 2, /* indicates the number of Master keys */ + NULL, /* indicates that EKT is not in use */ + 128, /* replay window size */ + 0, /* retransmission not allowed */ + NULL, /* no encrypted extension headers */ + 0, /* list of encrypted extension headers is empty */ + NULL +}; + +// clang-format off +unsigned char test_256_key[46] = { + 0xf0, 0xf0, 0x49, 0x14, 0xb5, 0x13, 0xf2, 0x76, + 0x3a, 0x1b, 0x1f, 0xa1, 0x30, 0xf1, 0x0e, 0x29, + 0x98, 0xf6, 0xf6, 0xe4, 0x3e, 0x43, 0x09, 0xd1, + 0xe6, 0x22, 0xa0, 0xe3, 0x32, 0xb9, 0xf1, 0xb6, + + 0x3b, 0x04, 0x80, 0x3d, 0xe5, 0x1e, 0xe7, 0xc9, + 0x64, 0x23, 0xab, 0x5b, 0x78, 0xd2 +}; + +unsigned char test_256_key_2[46] = { + 0xe1, 0xf9, 0x7a, 0x0d, 0x3e, 0x01, 0x8b, 0xe0, + 0xd6, 0x4f, 0xa3, 0x2c, 0x06, 0xde, 0x41, 0x39, + 0x0e, 0xc6, 0x75, 0xad, 0x49, 0x8a, 0xfe, 0xeb, + 0xb6, 0x96, 0x0b, 0x3a, 0xab, 0xe6, 0xc1, 0x73, + 0x3b, 0x04, 0x80, 0x3d, 0xe5, 0x1e, 0xe7, 0xc9, + 0x64, 0x23, 0xab, 0x5b, 0x78, 0xd2 +}; + +srtp_master_key_t master_256_key_1 = { + test_256_key, + test_mki_id, + TEST_MKI_ID_SIZE +}; + +srtp_master_key_t master_256_key_2 = { + test_256_key_2, + test_mki_id_2, + TEST_MKI_ID_SIZE +}; + +srtp_master_key_t *test_256_keys[2] = { + &master_key_1, + &master_key_2 +}; +// clang-format on + +const srtp_policy_t aes_256_hmac_policy = { + { ssrc_any_outbound, 0 }, /* SSRC */ + { + /* SRTP policy */ + SRTP_AES_ICM_256, /* cipher type */ + SRTP_AES_ICM_256_KEY_LEN_WSALT, /* cipher key length in octets */ + SRTP_HMAC_SHA1, /* authentication func type */ + 20, /* auth key length in octets */ + 10, /* auth tag length in octets */ + sec_serv_conf_and_auth /* security services flag */ + }, + { + /* SRTCP policy */ + SRTP_AES_ICM_256, /* cipher type */ + SRTP_AES_ICM_256_KEY_LEN_WSALT, /* cipher key length in octets */ + SRTP_HMAC_SHA1, /* authentication func type */ + 20, /* auth key length in octets */ + 10, /* auth tag length in octets */ + sec_serv_conf_and_auth /* security services flag */ + }, + NULL, + (srtp_master_key_t **)test_256_keys, + 2, /* indicates the number of Master keys */ + NULL, /* indicates that EKT is not in use */ + 128, /* replay window size */ + 0, /* retransmission not allowed */ + NULL, /* no encrypted extension headers */ + 0, /* list of encrypted extension headers is empty */ + NULL +}; + +char ekt_test_policy = 'x'; + +const srtp_policy_t hmac_only_with_ekt_policy = { + { ssrc_any_outbound, 0 }, /* SSRC */ + { + SRTP_NULL_CIPHER, /* cipher type */ + 0, /* cipher key length in octets */ + SRTP_HMAC_SHA1, /* authentication func type */ + 20, /* auth key length in octets */ + 4, /* auth tag length in octets */ + sec_serv_auth /* security services flag */ + }, + { + SRTP_NULL_CIPHER, /* cipher type */ + 0, /* cipher key length in octets */ + SRTP_HMAC_SHA1, /* authentication func type */ + 20, /* auth key length in octets */ + 4, /* auth tag length in octets */ + sec_serv_auth /* security services flag */ + }, + NULL, + (srtp_master_key_t **)test_keys, + 2, /* indicates the number of Master keys */ + &ekt_test_policy, /* requests deprecated EKT functionality */ + 128, /* replay window size */ + 0, /* retransmission not allowed */ + NULL, /* no encrypted extension headers */ + 0, /* list of encrypted extension headers is empty */ + NULL +}; + +/* + * an array of pointers to the policies listed above + * + * This array is used to test various aspects of libSRTP for + * different cryptographic policies. The order of the elements + * matters - the timing test generates output that can be used + * in a plot (see the gnuplot script file 'timing'). If you + * add to this list, you should do it at the end. + */ + +// clang-format off +const srtp_policy_t *policy_array[] = { + &hmac_only_policy, + &aes_only_policy, + &default_policy, +#ifdef GCM + &aes128_gcm_8_policy, + &aes128_gcm_8_cauth_policy, + &aes256_gcm_8_policy, + &aes256_gcm_8_cauth_policy, +#endif + &null_policy, + &aes_256_hmac_policy, + NULL +}; +// clang-format on + +// clang-format off +const srtp_policy_t *invalid_policy_array[] = { + &hmac_only_with_ekt_policy, + NULL +}; +// clang-format on + +const srtp_policy_t wildcard_policy = { + { ssrc_any_outbound, 0 }, /* SSRC */ + { + /* SRTP policy */ + SRTP_AES_ICM_128, /* cipher type */ + SRTP_AES_ICM_128_KEY_LEN_WSALT, /* cipher key length in octets */ + SRTP_HMAC_SHA1, /* authentication func type */ + 16, /* auth key length in octets */ + 10, /* auth tag length in octets */ + sec_serv_conf_and_auth /* security services flag */ + }, + { + /* SRTCP policy */ + SRTP_AES_ICM_128, /* cipher type */ + SRTP_AES_ICM_128_KEY_LEN_WSALT, /* cipher key length in octets */ + SRTP_HMAC_SHA1, /* authentication func type */ + 16, /* auth key length in octets */ + 10, /* auth tag length in octets */ + sec_serv_conf_and_auth /* security services flag */ + }, + test_key, + NULL, + 0, + NULL, + 128, /* replay window size */ + 0, /* retransmission not allowed */ + NULL, /* no encrypted extension headers */ + 0, /* list of encrypted extension headers is empty */ + NULL +}; diff --git a/third_party/libsrtp/src/test/test_srtp.c b/third_party/libsrtp/src/test/test_srtp.c new file mode 100644 index 0000000000..0cea1f3c37 --- /dev/null +++ b/third_party/libsrtp/src/test/test_srtp.c @@ -0,0 +1,185 @@ +/* + * test_srtp.c + * + * Unit tests for internal srtp functions + * + * Cisco Systems, Inc. + * + */ + +/* + * + * Copyright (c) 2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +/* + * libSRTP specific. + */ +#include "../srtp/srtp.c" // Get access to static functions + +/* + * Test specific. + */ +#include "cutest.h" + +/* + * Standard library. + */ + +/* + * Forward declarations for all tests. + */ + +void srtp_calc_aead_iv_srtcp_all_zero_input_yield_zero_output(void); +void srtp_calc_aead_iv_srtcp_seq_num_over_0x7FFFFFFF_bad_param(void); +void srtp_calc_aead_iv_srtcp_distinct_iv_per_sequence_number(void); + +/* + * NULL terminated array of tests. + * The first item in the array is a char[] which give some information about + * what is being tested and is displayed to the user during runtime, the second + * item is the test function. + */ + +TEST_LIST = { { "srtp_calc_aead_iv_srtcp_all_zero_input_yield_zero_output()", + srtp_calc_aead_iv_srtcp_all_zero_input_yield_zero_output }, + { "srtp_calc_aead_iv_srtcp_seq_num_over_0x7FFFFFFF_bad_param()", + srtp_calc_aead_iv_srtcp_seq_num_over_0x7FFFFFFF_bad_param }, + { "srtp_calc_aead_iv_srtcp_distinct_iv_per_sequence_number()", + srtp_calc_aead_iv_srtcp_distinct_iv_per_sequence_number }, + { NULL } /* End of tests */ }; + +/* + * Implementation. + */ + +void srtp_calc_aead_iv_srtcp_all_zero_input_yield_zero_output() +{ + // Preconditions + srtp_session_keys_t session_keys; + v128_t init_vector; + srtcp_hdr_t header; + uint32_t sequence_num; + + // Postconditions + srtp_err_status_t status; + const v128_t zero_vector; + memset((v128_t *)&zero_vector, 0, sizeof(v128_t)); + + // Given + memset(&session_keys, 0, sizeof(srtp_session_keys_t)); + memset(&init_vector, 0, sizeof(v128_t)); + memset(&header, 0, sizeof(srtcp_hdr_t)); + sequence_num = 0x0UL; + + // When + status = srtp_calc_aead_iv_srtcp(&session_keys, &init_vector, sequence_num, + &header); + + // Then + TEST_CHECK(status == srtp_err_status_ok); + TEST_CHECK(memcmp(&zero_vector, &init_vector, sizeof(v128_t)) == 0); +} + +void srtp_calc_aead_iv_srtcp_seq_num_over_0x7FFFFFFF_bad_param() +{ + // Preconditions + srtp_session_keys_t session_keys; + v128_t init_vector; + srtcp_hdr_t header; + uint32_t sequence_num; + + // Postconditions + srtp_err_status_t status; + + // Given + memset(&session_keys, 0, sizeof(srtp_session_keys_t)); + memset(&init_vector, 0, sizeof(v128_t)); + memset(&header, 0, sizeof(srtcp_hdr_t)); + sequence_num = 0x7FFFFFFFUL + 0x1UL; + + // When + status = srtp_calc_aead_iv_srtcp(&session_keys, &init_vector, sequence_num, + &header); + + // Then + TEST_CHECK(status == srtp_err_status_bad_param); +} + +/* + * Regression test for issue #256: + * Srtcp IV calculation incorrectly masks high bit of sequence number for + * little-endian platforms. + * Ensure that for each valid sequence number where the most significant bit is + * high that we get an expected and unique IV. + */ +void srtp_calc_aead_iv_srtcp_distinct_iv_per_sequence_number() +{ +#define SAMPLE_COUNT (3) + // Preconditions + // Test each significant bit high in each full byte. + srtp_session_keys_t session_keys; + srtcp_hdr_t header; + v128_t output_iv[SAMPLE_COUNT]; + uint32_t sequence_num[SAMPLE_COUNT]; + v128_t final_iv[SAMPLE_COUNT]; + size_t i = 0; + memset(&output_iv, 0, SAMPLE_COUNT * sizeof(v128_t)); + sequence_num[0] = 0xFF; + sequence_num[1] = 0xFF00; + sequence_num[2] = 0xFF0000; + + // Postconditions + memset(&final_iv, 0, SAMPLE_COUNT * sizeof(v128_t)); + final_iv[0].v8[11] = 0xFF; + final_iv[1].v8[10] = 0xFF; + final_iv[2].v8[9] = 0xFF; + + // Given + memset(&session_keys, 0, sizeof(srtp_session_keys_t)); + memset(&header, 0, sizeof(srtcp_hdr_t)); + + // When + for (i = 0; i < SAMPLE_COUNT; i++) { + TEST_CHECK(srtp_calc_aead_iv_srtcp(&session_keys, &output_iv[i], + sequence_num[i], + &header) == srtp_err_status_ok); + } + + // Then all IVs are as expected + for (i = 0; i < SAMPLE_COUNT; i++) { + TEST_CHECK(memcmp(&final_iv[i], &output_iv[i], sizeof(v128_t)) == 0); + } +#undef SAMPLE_COUNT +} diff --git a/third_party/libsrtp/src/test/ut_sim.c b/third_party/libsrtp/src/test/ut_sim.c new file mode 100644 index 0000000000..2825b68df9 --- /dev/null +++ b/third_party/libsrtp/src/test/ut_sim.c @@ -0,0 +1,107 @@ +/* + * ut_sim.c + * + * an unreliable transport simulator + * (for testing replay databases and suchlike) + * + * David A. McGrew + * Cisco Systems, Inc. + */ + +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "ut_sim.h" +#include "cipher_priv.h" + +int ut_compar(const void *a, const void *b) +{ + uint8_t r; + srtp_cipher_rand_for_tests(&r, sizeof(r)); + return r > (UINT8_MAX / 2) ? -1 : 1; +} + +void ut_init(ut_connection *utc) +{ + int i; + utc->index = 0; + + for (i = 0; i < UT_BUF; i++) + utc->buffer[i] = i; + + qsort(utc->buffer, UT_BUF, sizeof(uint32_t), ut_compar); + + utc->index = UT_BUF - 1; +} + +uint32_t ut_next_index(ut_connection *utc) +{ + uint32_t tmp; + + tmp = utc->buffer[0]; + utc->index++; + utc->buffer[0] = utc->index; + + qsort(utc->buffer, UT_BUF, sizeof(uint32_t), ut_compar); + + return tmp; +} + +#ifdef UT_TEST + +#include <stdio.h> + +int main() +{ + uint32_t i, irecvd, idiff; + ut_connection utc; + + ut_init(&utc); + + for (i = 0; i < 1000; i++) { + irecvd = ut_next_index(&utc); + idiff = i - irecvd; + printf("%lu\t%lu\t%d\n", i, irecvd, idiff); + } + + return 0; +} + +#endif diff --git a/third_party/libsrtp/src/test/ut_sim.h b/third_party/libsrtp/src/test/ut_sim.h new file mode 100644 index 0000000000..e678b5fdf7 --- /dev/null +++ b/third_party/libsrtp/src/test/ut_sim.h @@ -0,0 +1,83 @@ +/* + * ut-sim.h + * + * an unreliable transport simulator + * (for testing replay databases and suchlike) + * + * David A. McGrew + * Cisco Systems, Inc. + */ + +/* + * + * Copyright (c) 2001-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#ifndef UT_SIM_H +#define UT_SIM_H + +#include "integers.h" /* for uint32_t */ + +#ifdef __cplusplus +extern "C" { +#endif + +#define UT_BUF 160 /* maximum amount of packet reorder */ + +typedef struct { + uint32_t index; + uint32_t buffer[UT_BUF]; +} ut_connection; + +/* + * ut_init(&u) initializes the ut_connection + * + * this function should always be the first one called on a new + * ut_connection + */ + +void ut_init(ut_connection *utc); + +/* + * ut_next_index(&u) returns the next index from the simulated + * unreliable connection + */ + +uint32_t ut_next_index(ut_connection *utc); + +#ifdef __cplusplus +} +#endif + +#endif /* UT_SIM_H */ diff --git a/third_party/libsrtp/src/test/util.c b/third_party/libsrtp/src/test/util.c new file mode 100644 index 0000000000..c0f7614903 --- /dev/null +++ b/third_party/libsrtp/src/test/util.c @@ -0,0 +1,212 @@ +/* + * util.c + * + * Utilities used by the test apps + * + * John A. Foley + * Cisco Systems, Inc. + */ +/* + * + * Copyright (c) 2014-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#include "config.h" +#include "util.h" + +#include <string.h> +#include <stdint.h> + +/* include space for null terminator */ +static char bit_string[MAX_PRINT_STRING_LEN + 1]; + +static inline int hex_char_to_nibble(uint8_t c) +{ + switch (c) { + case ('0'): + return 0x0; + case ('1'): + return 0x1; + case ('2'): + return 0x2; + case ('3'): + return 0x3; + case ('4'): + return 0x4; + case ('5'): + return 0x5; + case ('6'): + return 0x6; + case ('7'): + return 0x7; + case ('8'): + return 0x8; + case ('9'): + return 0x9; + case ('a'): + return 0xa; + case ('A'): + return 0xa; + case ('b'): + return 0xb; + case ('B'): + return 0xb; + case ('c'): + return 0xc; + case ('C'): + return 0xc; + case ('d'): + return 0xd; + case ('D'): + return 0xd; + case ('e'): + return 0xe; + case ('E'): + return 0xe; + case ('f'): + return 0xf; + case ('F'): + return 0xf; + default: + return -1; /* this flags an error */ + } + /* NOTREACHED */ + return -1; /* this keeps compilers from complaining */ +} + +uint8_t nibble_to_hex_char(uint8_t nibble) +{ + char buf[16] = { '0', '1', '2', '3', '4', '5', '6', '7', + '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' }; + + return buf[nibble & 0xF]; +} + +/* + * hex_string_to_octet_string converts a hexadecimal string + * of length 2 * len to a raw octet string of length len + */ +int hex_string_to_octet_string(char *raw, char *hex, int len) +{ + uint8_t x; + int tmp; + int hex_len; + + hex_len = 0; + while (hex_len < len) { + tmp = hex_char_to_nibble(hex[0]); + if (tmp == -1) { + return hex_len; + } + x = (tmp << 4); + hex_len++; + tmp = hex_char_to_nibble(hex[1]); + if (tmp == -1) { + return hex_len; + } + x |= (tmp & 0xff); + hex_len++; + *raw++ = x; + hex += 2; + } + return hex_len; +} + +char *octet_string_hex_string(const void *s, int length) +{ + const uint8_t *str = (const uint8_t *)s; + int i; + + /* double length, since one octet takes two hex characters */ + length *= 2; + + /* truncate string if it would be too long */ + if (length > MAX_PRINT_STRING_LEN) { + length = MAX_PRINT_STRING_LEN; + } + + for (i = 0; i < length; i += 2) { + bit_string[i] = nibble_to_hex_char(*str >> 4); + bit_string[i + 1] = nibble_to_hex_char(*str++ & 0xF); + } + bit_string[i] = 0; /* null terminate string */ + return bit_string; +} + +static const char b64chars[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" + "abcdefghijklmnopqrstuvwxyz0123456789+/"; + +static int base64_block_to_octet_triple(char *out, char *in) +{ + unsigned char sextets[4] = { 0 }; + int j = 0; + int i; + + for (i = 0; i < 4; i++) { + char *p = strchr(b64chars, in[i]); + if (p != NULL) { + sextets[i] = p - b64chars; + } else { + j++; + } + } + + out[0] = (sextets[0] << 2) | (sextets[1] >> 4); + if (j < 2) { + out[1] = (sextets[1] << 4) | (sextets[2] >> 2); + } + if (j < 1) { + out[2] = (sextets[2] << 6) | sextets[3]; + } + return j; +} + +int base64_string_to_octet_string(char *out, int *pad, char *in, int len) +{ + int k = 0; + int i = 0; + int j = 0; + + if (len % 4 != 0) { + return 0; + } + + while (i < len && j == 0) { + j = base64_block_to_octet_triple(out + k, in + i); + k += 3; + i += 4; + } + *pad = j; + return i; +} diff --git a/third_party/libsrtp/src/test/util.h b/third_party/libsrtp/src/test/util.h new file mode 100644 index 0000000000..d04b279b3a --- /dev/null +++ b/third_party/libsrtp/src/test/util.h @@ -0,0 +1,53 @@ +/* + * util.h + * + * Utilities used by the test apps + * + * John A. Foley + * Cisco Systems, Inc. + */ +/* + * + * Copyright (c) 2014-2017, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ +#ifndef SRTP_TEST_UTIL_H +#define SRTP_TEST_UTIL_H + +#define MAX_PRINT_STRING_LEN 1024 + +int hex_string_to_octet_string(char *raw, char *hex, int len); +char *octet_string_hex_string(const void *s, int length); +int base64_string_to_octet_string(char *raw, int *pad, char *base64, int len); + +#endif diff --git a/third_party/libsrtp/src/test/words.txt b/third_party/libsrtp/src/test/words.txt new file mode 100644 index 0000000000..fe99c2d465 --- /dev/null +++ b/third_party/libsrtp/src/test/words.txt @@ -0,0 +1,250 @@ +abducing +acidheads +acidness +actons +admixtures +affidavit +agelastic +alated +alimentary +alleviated +allseed +annexure +arragonite +atonements +autacoid +axe +axon +ayres +beathing +blazonry +bottom +braising +brehon +brindisi +broadcasts +buds +bulnbulns +bushcraft +calamander +calipee +casing +caveat +chaffings +citifies +clappers +claques +clavate +colonial +colonials +commonalty +compares +consequent +consumed +contango +courtierly +creamery +cruddiest +cue +cultish +cumin +cyclus +dahlias +dentitions +derailers +devitrify +dibs +diphysite +disjunes +drolleries +dubitated +dupion +earliness +eductor +elenctic +empresses +entames +epaulettes +epicanthic +epochal +estated +eurhythmic +exfoliated +extremity +fayence +figgery +flaming +foes +forelays +forewings +forfeits +fratches +gardened +gentile +glumpish +glyph +goatherd +grow +gulden +gumming +hackling +hanapers +hared +hatters +hectare +hedger +heel +heterodox +hidden +histologic +howe +inglobe +inliers +inuredness +iotacism +japed +jelled +jiffy +jollies +judgeship +karite +kart +kenophobia +kittens +lactarian +lancets +leasable +leep +leming +licorice +listing +lividly +lobectomy +lysosome +madders +maderizing +manacle +mangels +marshiest +maulstick +meliorates +mercy +mikados +monarchise +moultings +mucro +munnions +mystic +myxoedemic +nointing +nong +nonsense +ochidore +octuor +officering +opaqued +oragious +outtell +oxeye +pads +palamae +pansophy +parazoa +pepsines +perimetric +pheasant +phonotypy +pitarah +plaintful +poinders +poke +politer +poonces +populism +pouty +praedial +presence +prompter +pummelled +punishing +quippish +radicality +radiuses +rebuffing +recorded +redips +regulators +replay +retrocedes +rigors +risen +rootstocks +rotenone +rudenesses +ruggedest +runabout +ruthfully +sagacious +scapes +sclera +sclerotium +scumbering +secondi +serial +shampoo +showed +sights +sirenised +sized +slave +socle +solidness +some +spetches +spiels +squiring +staminode +stay +stewpot +stunsails +subhumid +subprogram +supawn +surplusage +swimming +swineherd +tabun +talliths +taroks +tensed +thinnings +three +tipper +toko +tomahawks +tombolos +torpefy +torulae +touns +travails +tsarist +unbeseems +unblamably +unbooked +unnailed +updates +valorise +viability +virtue +vulturns +vulvate +warran +weakness +westernise +whingeings +wrenching +written +yak +yate +yaupon +zendiks diff --git a/third_party/libsrtp/update_srtp.sh b/third_party/libsrtp/update_srtp.sh new file mode 100644 index 0000000000..36e1e72a07 --- /dev/null +++ b/third_party/libsrtp/update_srtp.sh @@ -0,0 +1,29 @@ +#!/bin/bash +# +# This Source Code Form is subject to the terms of the Mozilla Public +# License, v. 2.0. If a copy of the MPL was not distributed with this +# file, You can obtain one at http://mozilla.org/MPL/2.0/. + +# assume $1 is the directory with a git checkout of the libsrtp source +# +# srtp source is available at: https://github.com/cisco/libsrtp/ +# +# also assumes we've made *NO* changes to the SRTP sources! If we do, we have to merge by +# hand after this process, or use a more complex one. +# +# For example, one could update an srtp library import head, and merge back to default. Or keep a +# separate repo with this in it, and pull from there to m-c and merge. +if [ "$1" ] ; then + DATE=`date` + REVISION=`(cd $1; git log --pretty=oneline | head -1 | cut -c 1-40)` + cp -rf $1/srtp $1/crypto $1/include $1/test $1/LICENSE $1/CHANGES $1/README.md third_party/libsrtp/src + + hg addremove third_party/libsrtp/src --include "third_party/libsrtp/src/VERSION" --include "third_party/libsrtp/src/LICENSE" --include "third_party/libsrtp/src/README.md" --include "**.c" --include "**.h" --similarity 90 + + echo "srtp updated to revision $REVISION from git on $DATE" >> third_party/libsrtp/srtp_update.log + echo "srtp updated to revision $REVISION from git on $DATE" + echo "WARNING: reapply any local patches!" +else + echo "usage: $0 path_to_srtp_directory" + echo "run from the root of your m-c clone" +fi |