2 * Copyright 2011-2016 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
,
42 static int find_profile_by_name(char *profile_name
,
43 SRTP_PROTECTION_PROFILE
**pptr
, size_t len
)
45 SRTP_PROTECTION_PROFILE
*p
;
47 p
= srtp_known_profiles
;
49 if ((len
== strlen(p
->name
))
50 && strncmp(p
->name
, profile_name
, len
) == 0) {
61 static int ssl_ctx_make_profiles(const char *profiles_string
,
62 STACK_OF(SRTP_PROTECTION_PROFILE
) **out
)
64 STACK_OF(SRTP_PROTECTION_PROFILE
) *profiles
;
67 char *ptr
= (char *)profiles_string
;
68 SRTP_PROTECTION_PROFILE
*p
;
70 if ((profiles
= sk_SRTP_PROTECTION_PROFILE_new_null()) == NULL
) {
71 SSLerr(SSL_F_SSL_CTX_MAKE_PROFILES
,
72 SSL_R_SRTP_COULD_NOT_ALLOCATE_PROFILES
);
77 col
= strchr(ptr
, ':');
79 if (!find_profile_by_name(ptr
, &p
, col
? (size_t)(col
- ptr
)
81 if (sk_SRTP_PROTECTION_PROFILE_find(profiles
, p
) >= 0) {
82 SSLerr(SSL_F_SSL_CTX_MAKE_PROFILES
,
83 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST
);
87 if (!sk_SRTP_PROTECTION_PROFILE_push(profiles
, p
)) {
88 SSLerr(SSL_F_SSL_CTX_MAKE_PROFILES
,
89 SSL_R_SRTP_COULD_NOT_ALLOCATE_PROFILES
);
93 SSLerr(SSL_F_SSL_CTX_MAKE_PROFILES
,
94 SSL_R_SRTP_UNKNOWN_PROTECTION_PROFILE
);
102 sk_SRTP_PROTECTION_PROFILE_free(*out
);
108 sk_SRTP_PROTECTION_PROFILE_free(profiles
);
112 int SSL_CTX_set_tlsext_use_srtp(SSL_CTX
*ctx
, const char *profiles
)
114 return ssl_ctx_make_profiles(profiles
, &ctx
->srtp_profiles
);
117 int SSL_set_tlsext_use_srtp(SSL
*s
, const char *profiles
)
119 return ssl_ctx_make_profiles(profiles
, &s
->srtp_profiles
);
122 STACK_OF(SRTP_PROTECTION_PROFILE
) *SSL_get_srtp_profiles(SSL
*s
)
125 if (s
->srtp_profiles
!= NULL
) {
126 return s
->srtp_profiles
;
127 } else if ((s
->ctx
!= NULL
) && (s
->ctx
->srtp_profiles
!= NULL
)) {
128 return s
->ctx
->srtp_profiles
;
135 SRTP_PROTECTION_PROFILE
*SSL_get_selected_srtp_profile(SSL
*s
)
137 return s
->srtp_profile
;