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-rw-r--r--src/lib/libssl/d1_srtp.c473
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diff --git a/src/lib/libssl/d1_srtp.c b/src/lib/libssl/d1_srtp.c
deleted file mode 100644
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1/* $OpenBSD: d1_srtp.c,v 1.15 2015/07/31 00:35:06 doug 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
122#include "ssl_locl.h"
123
124#ifndef OPENSSL_NO_SRTP
125
126#include "bytestring.h"
127#include "srtp.h"
128
129static SRTP_PROTECTION_PROFILE srtp_known_profiles[] = {
130 {
131 "SRTP_AES128_CM_SHA1_80",
132 SRTP_AES128_CM_SHA1_80,
133 },
134 {
135 "SRTP_AES128_CM_SHA1_32",
136 SRTP_AES128_CM_SHA1_32,
137 },
138 {0}
139};
140
141static int
142find_profile_by_name(char *profile_name, SRTP_PROTECTION_PROFILE **pptr,
143 unsigned len)
144{
145 SRTP_PROTECTION_PROFILE *p;
146
147 p = srtp_known_profiles;
148 while (p->name) {
149 if ((len == strlen(p->name)) &&
150 !strncmp(p->name, profile_name, len)) {
151 *pptr = p;
152 return 0;
153 }
154
155 p++;
156 }
157
158 return 1;
159}
160
161static int
162find_profile_by_num(unsigned profile_num, SRTP_PROTECTION_PROFILE **pptr)
163{
164 SRTP_PROTECTION_PROFILE *p;
165
166 p = srtp_known_profiles;
167 while (p->name) {
168 if (p->id == profile_num) {
169 *pptr = p;
170 return 0;
171 }
172 p++;
173 }
174
175 return 1;
176}
177
178static int
179ssl_ctx_make_profiles(const char *profiles_string,
180 STACK_OF(SRTP_PROTECTION_PROFILE) **out)
181{
182 STACK_OF(SRTP_PROTECTION_PROFILE) *profiles;
183
184 char *col;
185 char *ptr = (char *)profiles_string;
186
187 SRTP_PROTECTION_PROFILE *p;
188
189 if (!(profiles = sk_SRTP_PROTECTION_PROFILE_new_null())) {
190 SSLerr(SSL_F_SSL_CTX_MAKE_PROFILES,
191 SSL_R_SRTP_COULD_NOT_ALLOCATE_PROFILES);
192 return 1;
193 }
194
195 do {
196 col = strchr(ptr, ':');
197
198 if (!find_profile_by_name(ptr, &p,
199 col ? col - ptr : (int)strlen(ptr))) {
200 sk_SRTP_PROTECTION_PROFILE_push(profiles, p);
201 } else {
202 SSLerr(SSL_F_SSL_CTX_MAKE_PROFILES,
203 SSL_R_SRTP_UNKNOWN_PROTECTION_PROFILE);
204 sk_SRTP_PROTECTION_PROFILE_free(profiles);
205 return 1;
206 }
207
208 if (col)
209 ptr = col + 1;
210 } while (col);
211
212 *out = profiles;
213
214 return 0;
215}
216
217int
218SSL_CTX_set_tlsext_use_srtp(SSL_CTX *ctx, const char *profiles)
219{
220 return ssl_ctx_make_profiles(profiles, &ctx->srtp_profiles);
221}
222
223int
224SSL_set_tlsext_use_srtp(SSL *s, const char *profiles)
225{
226 return ssl_ctx_make_profiles(profiles, &s->srtp_profiles);
227}
228
229
230STACK_OF(SRTP_PROTECTION_PROFILE) *
231SSL_get_srtp_profiles(SSL *s)
232{
233 if (s != NULL) {
234 if (s->srtp_profiles != NULL) {
235 return s->srtp_profiles;
236 } else if ((s->ctx != NULL) &&
237 (s->ctx->srtp_profiles != NULL)) {
238 return s->ctx->srtp_profiles;
239 }
240 }
241
242 return NULL;
243}
244
245SRTP_PROTECTION_PROFILE *
246SSL_get_selected_srtp_profile(SSL *s)
247{
248 return s->srtp_profile;
249}
250
251/* Note: this function returns 0 length if there are no
252 profiles specified */
253int
254ssl_add_clienthello_use_srtp_ext(SSL *s, unsigned char *p, int *len, int maxlen)
255{
256 int ct = 0;
257 int i;
258 STACK_OF(SRTP_PROTECTION_PROFILE) *clnt = 0;
259 SRTP_PROTECTION_PROFILE *prof;
260
261 clnt = SSL_get_srtp_profiles(s);
262
263 ct = sk_SRTP_PROTECTION_PROFILE_num(clnt); /* -1 if clnt == 0 */
264
265 if (p) {
266 if (ct == 0) {
267 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_USE_SRTP_EXT,
268 SSL_R_EMPTY_SRTP_PROTECTION_PROFILE_LIST);
269 return 1;
270 }
271
272 if ((2 + ct * 2 + 1) > maxlen) {
273 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_USE_SRTP_EXT,
274 SSL_R_SRTP_PROTECTION_PROFILE_LIST_TOO_LONG);
275 return 1;
276 }
277
278 /* Add the length */
279 s2n(ct * 2, p);
280 for (i = 0; i < ct; i++) {
281 prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i);
282 s2n(prof->id, p);
283 }
284
285 /* Add an empty use_mki value */
286 *p++ = 0;
287 }
288
289 *len = 2 + ct*2 + 1;
290
291 return 0;
292}
293
294
295int
296ssl_parse_clienthello_use_srtp_ext(SSL *s, const unsigned char *d, int len,
297 int *al)
298{
299 SRTP_PROTECTION_PROFILE *cprof, *sprof;
300 STACK_OF(SRTP_PROTECTION_PROFILE) *clnt = 0, *srvr;
301 int i, j;
302 int ret = 1;
303 uint16_t id;
304 CBS cbs, ciphers, mki;
305
306 if (len < 0) {
307 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_USE_SRTP_EXT,
308 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
309 *al = SSL_AD_DECODE_ERROR;
310 goto done;
311 }
312
313 CBS_init(&cbs, d, len);
314 /* Pull off the cipher suite list */
315 if (!CBS_get_u16_length_prefixed(&cbs, &ciphers) ||
316 CBS_len(&ciphers) % 2) {
317 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_USE_SRTP_EXT,
318 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
319 *al = SSL_AD_DECODE_ERROR;
320 goto done;
321 }
322
323 clnt = sk_SRTP_PROTECTION_PROFILE_new_null();
324
325 while (CBS_len(&ciphers) > 0) {
326 if (!CBS_get_u16(&ciphers, &id)) {
327 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_USE_SRTP_EXT,
328 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
329 *al = SSL_AD_DECODE_ERROR;
330 goto done;
331 }
332
333 if (!find_profile_by_num(id, &cprof))
334 sk_SRTP_PROTECTION_PROFILE_push(clnt, cprof);
335 else
336 ; /* Ignore */
337 }
338
339 /* Extract the MKI value as a sanity check, but discard it for now. */
340 if (!CBS_get_u8_length_prefixed(&cbs, &mki) ||
341 CBS_len(&cbs) != 0) {
342 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_USE_SRTP_EXT,
343 SSL_R_BAD_SRTP_MKI_VALUE);
344 *al = SSL_AD_DECODE_ERROR;
345 goto done;
346 }
347
348 srvr = SSL_get_srtp_profiles(s);
349
350 /*
351 * Pick our most preferred profile. If no profiles have been
352 * configured then the outer loop doesn't run
353 * (sk_SRTP_PROTECTION_PROFILE_num() = -1)
354 * and so we just return without doing anything.
355 */
356 for (i = 0; i < sk_SRTP_PROTECTION_PROFILE_num(srvr); i++) {
357 sprof = sk_SRTP_PROTECTION_PROFILE_value(srvr, i);
358
359 for (j = 0; j < sk_SRTP_PROTECTION_PROFILE_num(clnt); j++) {
360 cprof = sk_SRTP_PROTECTION_PROFILE_value(clnt, j);
361
362 if (cprof->id == sprof->id) {
363 s->srtp_profile = sprof;
364 *al = 0;
365 ret = 0;
366 goto done;
367 }
368 }
369 }
370
371 ret = 0;
372
373done:
374 if (clnt)
375 sk_SRTP_PROTECTION_PROFILE_free(clnt);
376
377 return ret;
378}
379
380int
381ssl_add_serverhello_use_srtp_ext(SSL *s, unsigned char *p, int *len, int maxlen)
382{
383 if (p) {
384 if (maxlen < 5) {
385 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_USE_SRTP_EXT,
386 SSL_R_SRTP_PROTECTION_PROFILE_LIST_TOO_LONG);
387 return 1;
388 }
389
390 if (s->srtp_profile == 0) {
391 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_USE_SRTP_EXT,
392 SSL_R_USE_SRTP_NOT_NEGOTIATED);
393 return 1;
394 }
395 s2n(2, p);
396 s2n(s->srtp_profile->id, p);
397 *p++ = 0;
398 }
399 *len = 5;
400
401 return 0;
402}
403
404
405int
406ssl_parse_serverhello_use_srtp_ext(SSL *s, const unsigned char *d, int len, int *al)
407{
408 STACK_OF(SRTP_PROTECTION_PROFILE) *clnt;
409 SRTP_PROTECTION_PROFILE *prof;
410 int i;
411 uint16_t id;
412 CBS cbs, profile_ids, mki;
413
414 if (len < 0) {
415 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_USE_SRTP_EXT,
416 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
417 *al = SSL_AD_DECODE_ERROR;
418 return 1;
419 }
420
421 CBS_init(&cbs, d, len);
422
423 /*
424 * As per RFC 5764 section 4.1.1, server response MUST be a single
425 * profile id.
426 */
427 if (!CBS_get_u16_length_prefixed(&cbs, &profile_ids) ||
428 !CBS_get_u16(&profile_ids, &id) || CBS_len(&profile_ids) != 0) {
429 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_USE_SRTP_EXT,
430 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
431 *al = SSL_AD_DECODE_ERROR;
432 return 1;
433 }
434
435 /* Must be no MKI, since we never offer one. */
436 if (!CBS_get_u8_length_prefixed(&cbs, &mki) || CBS_len(&mki) != 0) {
437 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_USE_SRTP_EXT,
438 SSL_R_BAD_SRTP_MKI_VALUE);
439 *al = SSL_AD_ILLEGAL_PARAMETER;
440 return 1;
441 }
442
443 clnt = SSL_get_srtp_profiles(s);
444
445 /* Throw an error if the server gave us an unsolicited extension. */
446 if (clnt == NULL) {
447 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_USE_SRTP_EXT,
448 SSL_R_NO_SRTP_PROFILES);
449 *al = SSL_AD_DECODE_ERROR;
450 return 1;
451 }
452
453 /*
454 * Check to see if the server gave us something we support
455 * (and presumably offered).
456 */
457 for (i = 0; i < sk_SRTP_PROTECTION_PROFILE_num(clnt); i++) {
458 prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i);
459
460 if (prof->id == id) {
461 s->srtp_profile = prof;
462 *al = 0;
463 return 0;
464 }
465 }
466
467 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_USE_SRTP_EXT,
468 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
469 *al = SSL_AD_DECODE_ERROR;
470 return 1;
471}
472
473#endif
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