diff options
Diffstat (limited to 'third_party/libsrtp/src/crypto/hash')
| -rw-r--r-- | third_party/libsrtp/src/crypto/hash/auth.c | 193 | ||||
| -rw-r--r-- | third_party/libsrtp/src/crypto/hash/auth_test_cases.c | 70 | ||||
| -rw-r--r-- | third_party/libsrtp/src/crypto/hash/auth_test_cases.h | 48 | ||||
| -rw-r--r-- | third_party/libsrtp/src/crypto/hash/hmac.c | 249 | ||||
| -rw-r--r-- | third_party/libsrtp/src/crypto/hash/hmac_mbedtls.c | 221 | ||||
| -rw-r--r-- | third_party/libsrtp/src/crypto/hash/hmac_nss.c | 290 | ||||
| -rw-r--r-- | third_party/libsrtp/src/crypto/hash/hmac_ossl.c | 242 | ||||
| -rw-r--r-- | third_party/libsrtp/src/crypto/hash/null_auth.c | 168 | ||||
| -rw-r--r-- | third_party/libsrtp/src/crypto/hash/sha1.c | 463 |
9 files changed, 1944 insertions, 0 deletions
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; +} |