2 * Copyright 2011-2020 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 * DTLS code by Eric Rescorla <ekr@rtfm.com>
13 * Copyright (C) 2006, Network Resonance, Inc. Copyright (C) 2011, RTFM, Inc.
17 #include <openssl/objects.h>
18 #include "ssl_local.h"
20 #ifndef OPENSSL_NO_SRTP
22 static SRTP_PROTECTION_PROFILE srtp_known_profiles[] = {
24 "SRTP_AES128_CM_SHA1_80",
25 SRTP_AES128_CM_SHA1_80,
28 "SRTP_AES128_CM_SHA1_32",
29 SRTP_AES128_CM_SHA1_32,
32 "SRTP_AEAD_AES_128_GCM",
33 SRTP_AEAD_AES_128_GCM,
36 "SRTP_AEAD_AES_256_GCM",
37 SRTP_AEAD_AES_256_GCM,
40 "SRTP_DOUBLE_AEAD_AES_128_GCM_AEAD_AES_128_GCM",
41 SRTP_DOUBLE_AEAD_AES_128_GCM_AEAD_AES_128_GCM,
44 "SRTP_DOUBLE_AEAD_AES_256_GCM_AEAD_AES_256_GCM",
45 SRTP_DOUBLE_AEAD_AES_256_GCM_AEAD_AES_256_GCM,
48 "SRTP_ARIA_128_CTR_HMAC_SHA1_80",
49 SRTP_ARIA_128_CTR_HMAC_SHA1_80,
52 "SRTP_ARIA_128_CTR_HMAC_SHA1_32",
53 SRTP_ARIA_128_CTR_HMAC_SHA1_32,
56 "SRTP_ARIA_256_CTR_HMAC_SHA1_80",
57 SRTP_ARIA_256_CTR_HMAC_SHA1_80,
60 "SRTP_ARIA_256_CTR_HMAC_SHA1_32",
61 SRTP_ARIA_256_CTR_HMAC_SHA1_32,
64 "SRTP_AEAD_ARIA_128_GCM",
65 SRTP_AEAD_ARIA_128_GCM,
68 "SRTP_AEAD_ARIA_256_GCM",
69 SRTP_AEAD_ARIA_256_GCM,
74 static int find_profile_by_name(char *profile_name,
75 SRTP_PROTECTION_PROFILE **pptr, size_t len)
77 SRTP_PROTECTION_PROFILE *p;
79 p = srtp_known_profiles;
81 if ((len == strlen(p->name))
82 && strncmp(p->name, profile_name, len) == 0) {
93 static int ssl_ctx_make_profiles(const char *profiles_string,
94 STACK_OF(SRTP_PROTECTION_PROFILE) **out)
96 STACK_OF(SRTP_PROTECTION_PROFILE) *profiles;
99 char *ptr = (char *)profiles_string;
100 SRTP_PROTECTION_PROFILE *p;
102 if ((profiles = sk_SRTP_PROTECTION_PROFILE_new_null()) == NULL) {
103 ERR_raise(ERR_LIB_SSL, SSL_R_SRTP_COULD_NOT_ALLOCATE_PROFILES);
108 col = strchr(ptr, ':');
110 if (!find_profile_by_name(ptr, &p, col ? (size_t)(col - ptr)
112 if (sk_SRTP_PROTECTION_PROFILE_find(profiles, p) >= 0) {
113 ERR_raise(ERR_LIB_SSL, SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
117 if (!sk_SRTP_PROTECTION_PROFILE_push(profiles, p)) {
118 ERR_raise(ERR_LIB_SSL, SSL_R_SRTP_COULD_NOT_ALLOCATE_PROFILES);
122 ERR_raise(ERR_LIB_SSL, SSL_R_SRTP_UNKNOWN_PROTECTION_PROFILE);
130 sk_SRTP_PROTECTION_PROFILE_free(*out);
136 sk_SRTP_PROTECTION_PROFILE_free(profiles);
140 int SSL_CTX_set_tlsext_use_srtp(SSL_CTX *ctx, const char *profiles)
142 return ssl_ctx_make_profiles(profiles, &ctx->srtp_profiles);
145 int SSL_set_tlsext_use_srtp(SSL *s, const char *profiles)
147 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL_ONLY(s);
152 return ssl_ctx_make_profiles(profiles, &sc->srtp_profiles);
155 STACK_OF(SRTP_PROTECTION_PROFILE) *SSL_get_srtp_profiles(SSL *s)
157 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL_ONLY(s);
160 if (sc->srtp_profiles != NULL) {
161 return sc->srtp_profiles;
162 } else if ((s->ctx != NULL) && (s->ctx->srtp_profiles != NULL)) {
163 return s->ctx->srtp_profiles;
170 SRTP_PROTECTION_PROFILE *SSL_get_selected_srtp_profile(SSL *s)
172 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL_ONLY(s);
177 return sc->srtp_profile;