/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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 AUTHOR 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.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
/* ====================================================================
* Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. 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.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* openssl-core@openssl.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED 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 OpenSSL PROJECT OR
* ITS 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.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
/*
DTLS code by Eric Rescorla <ekr@rtfm.com>
Copyright (C) 2006, Network Resonance, Inc.
Copyright (C) 2011, RTFM, Inc.
*/
#include <openssl/ssl.h>
#include <string.h>
#include <openssl/bytestring.h>
#include <openssl/err.h>
#include "internal.h"
using namespace bssl;
static const SRTP_PROTECTION_PROFILE kSRTPProfiles[] = {
{
"SRTP_AES128_CM_SHA1_80", SRTP_AES128_CM_SHA1_80,
},
{
"SRTP_AES128_CM_SHA1_32", SRTP_AES128_CM_SHA1_32,
},
{
"SRTP_AEAD_AES_128_GCM", SRTP_AEAD_AES_128_GCM,
},
{
"SRTP_AEAD_AES_256_GCM", SRTP_AEAD_AES_256_GCM,
},
{0, 0},
};
static int find_profile_by_name(const char *profile_name,
const SRTP_PROTECTION_PROFILE **pptr,
size_t len) {
const SRTP_PROTECTION_PROFILE *p = kSRTPProfiles;
while (p->name) {
if (len == strlen(p->name) && !strncmp(p->name, profile_name, len)) {
*pptr = p;
return 1;
}
p++;
}
return 0;
}
static int ssl_ctx_make_profiles(
const char *profiles_string,
UniquePtr<STACK_OF(SRTP_PROTECTION_PROFILE)> *out) {
UniquePtr<STACK_OF(SRTP_PROTECTION_PROFILE)> profiles(
sk_SRTP_PROTECTION_PROFILE_new_null());
if (profiles == nullptr) {
OPENSSL_PUT_ERROR(SSL, SSL_R_SRTP_COULD_NOT_ALLOCATE_PROFILES);
return 0;
}
const char *col;
const char *ptr = profiles_string;
do {
col = strchr(ptr, ':');
const SRTP_PROTECTION_PROFILE *profile;
if (!find_profile_by_name(ptr, &profile,
col ? (size_t)(col - ptr) : strlen(ptr))) {
OPENSSL_PUT_ERROR(SSL, SSL_R_SRTP_UNKNOWN_PROTECTION_PROFILE);
return 0;
}
if (!sk_SRTP_PROTECTION_PROFILE_push(profiles.get(), profile)) {
return 0;
}
if (col) {
ptr = col + 1;
}
} while (col);
*out = std::move(profiles);
return 1;
}
int SSL_CTX_set_srtp_profiles(SSL_CTX *ctx, const char *profiles) {
return ssl_ctx_make_profiles(profiles, &ctx->srtp_profiles);
}
int SSL_set_srtp_profiles(SSL *ssl, const char *profiles) {
return ssl->config != nullptr &&
ssl_ctx_make_profiles(profiles, &ssl->config->srtp_profiles);
}
STACK_OF(SRTP_PROTECTION_PROFILE) *SSL_get_srtp_profiles(SSL *ssl) {
if (ssl == nullptr) {
return nullptr;
}
if (ssl->config == nullptr) {
assert(0);
return nullptr;
}
return ssl->config->srtp_profiles != nullptr
? ssl->config->srtp_profiles.get()
: ssl->ctx->srtp_profiles.get();
}
const SRTP_PROTECTION_PROFILE *SSL_get_selected_srtp_profile(SSL *ssl) {
return ssl->s3->srtp_profile;
}
int SSL_CTX_set_tlsext_use_srtp(SSL_CTX *ctx, const char *profiles) {
// This API inverts its return value.
return !SSL_CTX_set_srtp_profiles(ctx, profiles);
}
int SSL_set_tlsext_use_srtp(SSL *ssl, const char *profiles) {
// This API inverts its return value.
return !SSL_set_srtp_profiles(ssl, profiles);
}