1 /* $OpenBSD: d1_srtp.c,v 1.30 2022/01/28 13:11:56 inoguchi Exp $ */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 /* ==================================================================== 59 * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved. 60 * 61 * Redistribution and use in source and binary forms, with or without 62 * modification, are permitted provided that the following conditions 63 * are met: 64 * 65 * 1. Redistributions of source code must retain the above copyright 66 * notice, this list of conditions and the following disclaimer. 67 * 68 * 2. Redistributions in binary form must reproduce the above copyright 69 * notice, this list of conditions and the following disclaimer in 70 * the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3. All advertising materials mentioning features or use of this 74 * software must display the following acknowledgment: 75 * "This product includes software developed by the OpenSSL Project 76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 77 * 78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 79 * endorse or promote products derived from this software without 80 * prior written permission. For written permission, please contact 81 * openssl-core@openssl.org. 82 * 83 * 5. Products derived from this software may not be called "OpenSSL" 84 * nor may "OpenSSL" appear in their names without prior written 85 * permission of the OpenSSL Project. 86 * 87 * 6. Redistributions of any form whatsoever must retain the following 88 * acknowledgment: 89 * "This product includes software developed by the OpenSSL Project 90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 91 * 92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 103 * OF THE POSSIBILITY OF SUCH DAMAGE. 104 * ==================================================================== 105 * 106 * This product includes cryptographic software written by Eric Young 107 * (eay@cryptsoft.com). This product includes software written by Tim 108 * Hudson (tjh@cryptsoft.com). 109 * 110 */ 111 /* 112 * DTLS code by Eric Rescorla <ekr@rtfm.com> 113 * 114 * Copyright (C) 2006, Network Resonance, Inc. 115 * Copyright (C) 2011, RTFM, Inc. 116 */ 117 118 #include <stdio.h> 119 120 #include <openssl/objects.h> 121 #include <openssl/opensslconf.h> 122 123 #ifndef OPENSSL_NO_SRTP 124 125 #include "bytestring.h" 126 #include "dtls_locl.h" 127 #include "ssl_locl.h" 128 #include "srtp.h" 129 130 static const SRTP_PROTECTION_PROFILE srtp_known_profiles[] = { 131 { 132 "SRTP_AES128_CM_SHA1_80", 133 SRTP_AES128_CM_SHA1_80, 134 }, 135 { 136 "SRTP_AES128_CM_SHA1_32", 137 SRTP_AES128_CM_SHA1_32, 138 }, 139 { 140 "SRTP_AEAD_AES_128_GCM", 141 SRTP_AEAD_AES_128_GCM, 142 }, 143 { 144 "SRTP_AEAD_AES_256_GCM", 145 SRTP_AEAD_AES_256_GCM, 146 }, 147 {0} 148 }; 149 150 int 151 srtp_find_profile_by_name(const char *profile_name, 152 const SRTP_PROTECTION_PROFILE **pptr, unsigned int len) 153 { 154 const SRTP_PROTECTION_PROFILE *p; 155 156 p = srtp_known_profiles; 157 while (p->name) { 158 if ((len == strlen(p->name)) && 159 !strncmp(p->name, profile_name, len)) { 160 *pptr = p; 161 return 0; 162 } 163 164 p++; 165 } 166 167 return 1; 168 } 169 170 int 171 srtp_find_profile_by_num(unsigned int profile_num, 172 const SRTP_PROTECTION_PROFILE **pptr) 173 { 174 const SRTP_PROTECTION_PROFILE *p; 175 176 p = srtp_known_profiles; 177 while (p->name) { 178 if (p->id == profile_num) { 179 *pptr = p; 180 return 0; 181 } 182 p++; 183 } 184 185 return 1; 186 } 187 188 static int 189 ssl_ctx_make_profiles(const char *profiles_string, 190 STACK_OF(SRTP_PROTECTION_PROFILE) **out) 191 { 192 STACK_OF(SRTP_PROTECTION_PROFILE) *profiles; 193 char *col; 194 const char *ptr = profiles_string; 195 const SRTP_PROTECTION_PROFILE *p; 196 197 if (!(profiles = sk_SRTP_PROTECTION_PROFILE_new_null())) { 198 SSLerrorx(SSL_R_SRTP_COULD_NOT_ALLOCATE_PROFILES); 199 return 1; 200 } 201 202 do { 203 col = strchr(ptr, ':'); 204 205 if (!srtp_find_profile_by_name(ptr, &p, 206 col ? col - ptr : (int)strlen(ptr))) { 207 if (!sk_SRTP_PROTECTION_PROFILE_push(profiles, p)) { 208 sk_SRTP_PROTECTION_PROFILE_free(profiles); 209 return 1; 210 } 211 } else { 212 SSLerrorx(SSL_R_SRTP_UNKNOWN_PROTECTION_PROFILE); 213 sk_SRTP_PROTECTION_PROFILE_free(profiles); 214 return 1; 215 } 216 217 if (col) 218 ptr = col + 1; 219 } while (col); 220 221 sk_SRTP_PROTECTION_PROFILE_free(*out); 222 *out = profiles; 223 224 return 0; 225 } 226 227 int 228 SSL_CTX_set_tlsext_use_srtp(SSL_CTX *ctx, const char *profiles) 229 { 230 return ssl_ctx_make_profiles(profiles, &ctx->internal->srtp_profiles); 231 } 232 233 int 234 SSL_set_tlsext_use_srtp(SSL *s, const char *profiles) 235 { 236 return ssl_ctx_make_profiles(profiles, &s->internal->srtp_profiles); 237 } 238 239 240 STACK_OF(SRTP_PROTECTION_PROFILE) * 241 SSL_get_srtp_profiles(SSL *s) 242 { 243 if (s != NULL) { 244 if (s->internal->srtp_profiles != NULL) { 245 return s->internal->srtp_profiles; 246 } else if ((s->ctx != NULL) && 247 (s->ctx->internal->srtp_profiles != NULL)) { 248 return s->ctx->internal->srtp_profiles; 249 } 250 } 251 252 return NULL; 253 } 254 255 SRTP_PROTECTION_PROFILE * 256 SSL_get_selected_srtp_profile(SSL *s) 257 { 258 /* XXX cast away the const */ 259 return (SRTP_PROTECTION_PROFILE *)s->internal->srtp_profile; 260 } 261 262 #endif 263