1 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 2 * All rights reserved. 3 * 4 * This package is an SSL implementation written 5 * by Eric Young (eay (at) cryptsoft.com). 6 * The implementation was written so as to conform with Netscapes SSL. 7 * 8 * This library is free for commercial and non-commercial use as long as 9 * the following conditions are aheared to. The following conditions 10 * apply to all code found in this distribution, be it the RC4, RSA, 11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 12 * included with this distribution is covered by the same copyright terms 13 * except that the holder is Tim Hudson (tjh (at) cryptsoft.com). 14 * 15 * Copyright remains Eric Young's, and as such any Copyright notices in 16 * the code are not to be removed. 17 * If this package is used in a product, Eric Young should be given attribution 18 * as the author of the parts of the library used. 19 * This can be in the form of a textual message at program startup or 20 * in documentation (online or textual) provided with the package. 21 * 22 * Redistribution and use in source and binary forms, with or without 23 * modification, are permitted provided that the following conditions 24 * are met: 25 * 1. Redistributions of source code must retain the copyright 26 * notice, this list of conditions and the following disclaimer. 27 * 2. Redistributions in binary form must reproduce the above copyright 28 * notice, this list of conditions and the following disclaimer in the 29 * documentation and/or other materials provided with the distribution. 30 * 3. All advertising materials mentioning features or use of this software 31 * must display the following acknowledgement: 32 * "This product includes cryptographic software written by 33 * Eric Young (eay (at) cryptsoft.com)" 34 * The word 'cryptographic' can be left out if the rouines from the library 35 * being used are not cryptographic related :-). 36 * 4. If you include any Windows specific code (or a derivative thereof) from 37 * the apps directory (application code) you must include an acknowledgement: 38 * "This product includes software written by Tim Hudson (tjh (at) cryptsoft.com)" 39 * 40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50 * SUCH DAMAGE. 51 * 52 * The licence and distribution terms for any publically available version or 53 * derivative of this code cannot be changed. i.e. this code cannot simply be 54 * copied and put under another distribution licence 55 * [including the GNU Public Licence.] 56 */ 57 /* ==================================================================== 58 * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved. 59 * 60 * Redistribution and use in source and binary forms, with or without 61 * modification, are permitted provided that the following conditions 62 * are met: 63 * 64 * 1. Redistributions of source code must retain the above copyright 65 * notice, this list of conditions and the following disclaimer. 66 * 67 * 2. Redistributions in binary form must reproduce the above copyright 68 * notice, this list of conditions and the following disclaimer in 69 * the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3. All advertising materials mentioning features or use of this 73 * software must display the following acknowledgment: 74 * "This product includes software developed by the OpenSSL Project 75 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 76 * 77 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 78 * endorse or promote products derived from this software without 79 * prior written permission. For written permission, please contact 80 * openssl-core (at) openssl.org. 81 * 82 * 5. Products derived from this software may not be called "OpenSSL" 83 * nor may "OpenSSL" appear in their names without prior written 84 * permission of the OpenSSL Project. 85 * 86 * 6. Redistributions of any form whatsoever must retain the following 87 * acknowledgment: 88 * "This product includes software developed by the OpenSSL Project 89 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 90 * 91 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 92 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 93 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 94 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 95 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 96 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 97 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 98 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 99 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 100 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 101 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 102 * OF THE POSSIBILITY OF SUCH DAMAGE. 103 * ==================================================================== 104 * 105 * This product includes cryptographic software written by Eric Young 106 * (eay (at) cryptsoft.com). This product includes software written by Tim 107 * Hudson (tjh (at) cryptsoft.com). 108 * 109 */ 110 /* 111 DTLS code by Eric Rescorla <ekr (at) rtfm.com> 112 113 Copyright (C) 2006, Network Resonance, Inc. 114 Copyright (C) 2011, RTFM, Inc. 115 */ 116 117 #include <openssl/ssl.h> 118 119 #include <string.h> 120 121 #include <openssl/bytestring.h> 122 #include <openssl/err.h> 123 124 #include "internal.h" 125 126 127 using namespace bssl; 128 129 static const SRTP_PROTECTION_PROFILE kSRTPProfiles[] = { 130 { 131 "SRTP_AES128_CM_SHA1_80", SRTP_AES128_CM_SHA1_80, 132 }, 133 { 134 "SRTP_AES128_CM_SHA1_32", SRTP_AES128_CM_SHA1_32, 135 }, 136 { 137 "SRTP_AEAD_AES_128_GCM", SRTP_AEAD_AES_128_GCM, 138 }, 139 { 140 "SRTP_AEAD_AES_256_GCM", SRTP_AEAD_AES_256_GCM, 141 }, 142 {0, 0}, 143 }; 144 145 static int find_profile_by_name(const char *profile_name, 146 const SRTP_PROTECTION_PROFILE **pptr, 147 size_t len) { 148 const SRTP_PROTECTION_PROFILE *p = kSRTPProfiles; 149 while (p->name) { 150 if (len == strlen(p->name) && !strncmp(p->name, profile_name, len)) { 151 *pptr = p; 152 return 1; 153 } 154 155 p++; 156 } 157 158 return 0; 159 } 160 161 static int ssl_ctx_make_profiles(const char *profiles_string, 162 STACK_OF(SRTP_PROTECTION_PROFILE) **out) { 163 UniquePtr<STACK_OF(SRTP_PROTECTION_PROFILE)> profiles( 164 sk_SRTP_PROTECTION_PROFILE_new_null()); 165 if (profiles == nullptr) { 166 OPENSSL_PUT_ERROR(SSL, SSL_R_SRTP_COULD_NOT_ALLOCATE_PROFILES); 167 return 0; 168 } 169 170 const char *col; 171 const char *ptr = profiles_string; 172 do { 173 col = strchr(ptr, ':'); 174 175 const SRTP_PROTECTION_PROFILE *profile; 176 if (!find_profile_by_name(ptr, &profile, 177 col ? (size_t)(col - ptr) : strlen(ptr))) { 178 OPENSSL_PUT_ERROR(SSL, SSL_R_SRTP_UNKNOWN_PROTECTION_PROFILE); 179 return 0; 180 } 181 182 if (!sk_SRTP_PROTECTION_PROFILE_push(profiles.get(), profile)) { 183 return 0; 184 } 185 186 if (col) { 187 ptr = col + 1; 188 } 189 } while (col); 190 191 sk_SRTP_PROTECTION_PROFILE_free(*out); 192 *out = profiles.release(); 193 return 1; 194 } 195 196 int SSL_CTX_set_srtp_profiles(SSL_CTX *ctx, const char *profiles) { 197 return ssl_ctx_make_profiles(profiles, &ctx->srtp_profiles); 198 } 199 200 int SSL_set_srtp_profiles(SSL *ssl, const char *profiles) { 201 return ssl_ctx_make_profiles(profiles, &ssl->srtp_profiles); 202 } 203 204 STACK_OF(SRTP_PROTECTION_PROFILE) *SSL_get_srtp_profiles(SSL *ssl) { 205 if (ssl == NULL) { 206 return NULL; 207 } 208 209 if (ssl->srtp_profiles != NULL) { 210 return ssl->srtp_profiles; 211 } 212 213 if (ssl->ctx->srtp_profiles != NULL) { 214 return ssl->ctx->srtp_profiles; 215 } 216 217 return NULL; 218 } 219 220 const SRTP_PROTECTION_PROFILE *SSL_get_selected_srtp_profile(SSL *ssl) { 221 return ssl->srtp_profile; 222 } 223 224 int SSL_CTX_set_tlsext_use_srtp(SSL_CTX *ctx, const char *profiles) { 225 // This API inverts its return value. 226 return !SSL_CTX_set_srtp_profiles(ctx, profiles); 227 } 228 229 int SSL_set_tlsext_use_srtp(SSL *ssl, const char *profiles) { 230 // This API inverts its return value. 231 return !SSL_set_srtp_profiles(ssl, profiles); 232 } 233
