diff options
Diffstat (limited to 'netwerk/srtp/src/crypto/kernel')
| -rw-r--r-- | netwerk/srtp/src/crypto/kernel/alloc.c | 101 | ||||
| -rw-r--r-- | netwerk/srtp/src/crypto/kernel/crypto_kernel.c | 561 | ||||
| -rw-r--r-- | netwerk/srtp/src/crypto/kernel/err.c | 108 | ||||
| -rw-r--r-- | netwerk/srtp/src/crypto/kernel/key.c | 122 |
4 files changed, 892 insertions, 0 deletions
diff --git a/netwerk/srtp/src/crypto/kernel/alloc.c b/netwerk/srtp/src/crypto/kernel/alloc.c new file mode 100644 index 0000000000..dbe58266f4 --- /dev/null +++ b/netwerk/srtp/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 %d 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/netwerk/srtp/src/crypto/kernel/crypto_kernel.c b/netwerk/srtp/src/crypto/kernel/crypto_kernel.c new file mode 100644 index 0000000000..df6af7da88 --- /dev/null +++ b/netwerk/srtp/src/crypto/kernel/crypto_kernel.c @@ -0,0 +1,561 @@ +/* + * 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_stat); + 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, *new_ctype; + 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, *new_atype; + 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/netwerk/srtp/src/crypto/kernel/err.c b/netwerk/srtp/src/crypto/kernel/err.c new file mode 100644 index 0000000000..f443549e5a --- /dev/null +++ b/netwerk/srtp/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, ...) +{ + 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); + char msg[512]; + 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/netwerk/srtp/src/crypto/kernel/key.c b/netwerk/srtp/src/crypto/kernel/key.c new file mode 100644 index 0000000000..0466195046 --- /dev/null +++ b/netwerk/srtp/src/crypto/kernel/key.c @@ -0,0 +1,122 @@ +/* + * 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_err_status_t srtp_key_limit_check(const srtp_key_limit_t key) +{ + if (key->state == srtp_key_state_expired) { + return srtp_err_status_key_expired; + } + 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; +} |