2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
58 /* ====================================================================
59 * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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 * ====================================================================
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).
112 DTLS code by Eric Rescorla <ekr@rtfm.com>
114 Copyright (C) 2006, Network Resonance, Inc.
115 Copyright (C) 2011, RTFM, Inc.
118 #ifndef OPENSSL_NO_SRTP
121 #include <openssl/objects.h>
122 #include "ssl_locl.h"
126 static SRTP_PROTECTION_PROFILE srtp_known_profiles[]=
129 "SRTP_AES128_CM_SHA1_80",
130 SRTP_AES128_CM_SHA1_80,
133 "SRTP_AES128_CM_SHA1_32",
134 SRTP_AES128_CM_SHA1_32,
149 static int find_profile_by_name(char *profile_name,
150 SRTP_PROTECTION_PROFILE **pptr,unsigned len)
152 SRTP_PROTECTION_PROFILE *p;
154 p=srtp_known_profiles;
157 if((len == strlen(p->name)) && !strncmp(p->name,profile_name,
170 static int ssl_ctx_make_profiles(const char *profiles_string,STACK_OF(SRTP_PROTECTION_PROFILE) **out)
172 STACK_OF(SRTP_PROTECTION_PROFILE) *profiles;
175 char *ptr=(char *)profiles_string;
177 SRTP_PROTECTION_PROFILE *p;
179 if(!(profiles=sk_SRTP_PROTECTION_PROFILE_new_null()))
181 SSLerr(SSL_F_SSL_CTX_MAKE_PROFILES, SSL_R_SRTP_COULD_NOT_ALLOCATE_PROFILES);
189 if(!find_profile_by_name(ptr,&p,
190 col ? col-ptr : (int)strlen(ptr)))
192 if (sk_SRTP_PROTECTION_PROFILE_find(profiles,p) >= 0)
194 SSLerr(SSL_F_SSL_CTX_MAKE_PROFILES,SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
195 sk_SRTP_PROTECTION_PROFILE_free(profiles);
199 sk_SRTP_PROTECTION_PROFILE_push(profiles,p);
203 SSLerr(SSL_F_SSL_CTX_MAKE_PROFILES,SSL_R_SRTP_UNKNOWN_PROTECTION_PROFILE);
204 sk_SRTP_PROTECTION_PROFILE_free(profiles);
216 int SSL_CTX_set_tlsext_use_srtp(SSL_CTX *ctx,const char *profiles)
218 return ssl_ctx_make_profiles(profiles,&ctx->srtp_profiles);
221 int SSL_set_tlsext_use_srtp(SSL *s,const char *profiles)
223 return ssl_ctx_make_profiles(profiles,&s->srtp_profiles);
227 STACK_OF(SRTP_PROTECTION_PROFILE) *SSL_get_srtp_profiles(SSL *s)
231 if(s->srtp_profiles != NULL)
233 return s->srtp_profiles;
235 else if((s->ctx != NULL) &&
236 (s->ctx->srtp_profiles != NULL))
238 return s->ctx->srtp_profiles;
245 SRTP_PROTECTION_PROFILE *SSL_get_selected_srtp_profile(SSL *s)
247 return s->srtp_profile;
250 /* Note: this function returns 0 length if there are no
251 profiles specified */
252 int ssl_add_clienthello_use_srtp_ext(SSL *s, unsigned char *p, int *len, int maxlen)
256 STACK_OF(SRTP_PROTECTION_PROFILE) *clnt=0;
257 SRTP_PROTECTION_PROFILE *prof;
259 clnt=SSL_get_srtp_profiles(s);
260 ct=sk_SRTP_PROTECTION_PROFILE_num(clnt); /* -1 if clnt == 0 */
266 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_USE_SRTP_EXT,SSL_R_EMPTY_SRTP_PROTECTION_PROFILE_LIST);
270 if((2 + ct*2 + 1) > maxlen)
272 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_USE_SRTP_EXT,SSL_R_SRTP_PROTECTION_PROFILE_LIST_TOO_LONG);
280 prof=sk_SRTP_PROTECTION_PROFILE_value(clnt,i);
284 /* Add an empty use_mki value */
294 int ssl_parse_clienthello_use_srtp_ext(SSL *s, unsigned char *d, int len,int *al)
296 SRTP_PROTECTION_PROFILE *sprof;
297 STACK_OF(SRTP_PROTECTION_PROFILE) *srvr;
303 /* Length value + the MKI length */
306 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_USE_SRTP_EXT,SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
307 *al=SSL_AD_DECODE_ERROR;
311 /* Pull off the length of the cipher suite list */
315 /* Check that it is even */
318 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_USE_SRTP_EXT,SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
319 *al=SSL_AD_DECODE_ERROR;
323 /* Check that lengths are consistent */
326 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_USE_SRTP_EXT,SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
327 *al=SSL_AD_DECODE_ERROR;
331 srvr=SSL_get_srtp_profiles(s);
332 s->srtp_profile = NULL;
333 /* Search all profiles for a match initially */
334 srtp_pref = sk_SRTP_PROTECTION_PROFILE_num(srvr);
343 * Only look for match in profiles of higher preference than
345 * If no profiles have been have been configured then this
348 for (i = 0; i < srtp_pref; i++)
350 sprof = sk_SRTP_PROTECTION_PROFILE_value(srvr, i);
353 s->srtp_profile = sprof;
360 /* Now extract the MKI value as a sanity check, but discard it for now */
366 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_USE_SRTP_EXT,SSL_R_BAD_SRTP_MKI_VALUE);
367 *al=SSL_AD_DECODE_ERROR;
374 int ssl_add_serverhello_use_srtp_ext(SSL *s, unsigned char *p, int *len, int maxlen)
380 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_USE_SRTP_EXT,SSL_R_SRTP_PROTECTION_PROFILE_LIST_TOO_LONG);
384 if(s->srtp_profile==0)
386 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_USE_SRTP_EXT,SSL_R_USE_SRTP_NOT_NEGOTIATED);
390 s2n(s->srtp_profile->id,p);
399 int ssl_parse_serverhello_use_srtp_ext(SSL *s, unsigned char *d, int len,int *al)
405 STACK_OF(SRTP_PROTECTION_PROFILE) *clnt;
406 SRTP_PROTECTION_PROFILE *prof;
410 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_USE_SRTP_EXT,SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
411 *al=SSL_AD_DECODE_ERROR;
418 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_USE_SRTP_EXT,SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
419 *al=SSL_AD_DECODE_ERROR;
424 if (*d) /* Must be no MKI, since we never offer one */
426 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_USE_SRTP_EXT,SSL_R_BAD_SRTP_MKI_VALUE);
427 *al=SSL_AD_ILLEGAL_PARAMETER;
431 clnt=SSL_get_srtp_profiles(s);
433 /* Throw an error if the server gave us an unsolicited extension */
436 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_USE_SRTP_EXT,SSL_R_NO_SRTP_PROFILES);
437 *al=SSL_AD_DECODE_ERROR;
441 /* Check to see if the server gave us something we support
442 (and presumably offered)
444 for(i=0;i<sk_SRTP_PROTECTION_PROFILE_num(clnt);i++)
446 prof=sk_SRTP_PROTECTION_PROFILE_value(clnt,i);
450 s->srtp_profile=prof;
456 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_USE_SRTP_EXT,SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
457 *al=SSL_AD_DECODE_ERROR;