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authorcvs2svn <admin@example.com>2021-08-18 16:06:57 +0000
committercvs2svn <admin@example.com>2021-08-18 16:06:57 +0000
commitd56c8fa8260d226f98b26f017b45b9c2b135f38d (patch)
tree348178b41617813cc93787187984a734ef8379ca /src/lib/libssl/ssl_clnt.c
parent18b9c1bcab7c37d8c5bd05b8e0d14d0c59d96650 (diff)
downloadopenbsd-tb_20210818.tar.gz
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This commit was manufactured by cvs2git to create tag 'tb_20210818'.tb_20210818
Diffstat (limited to 'src/lib/libssl/ssl_clnt.c')
-rw-r--r--src/lib/libssl/ssl_clnt.c2770
1 files changed, 0 insertions, 2770 deletions
diff --git a/src/lib/libssl/ssl_clnt.c b/src/lib/libssl/ssl_clnt.c
deleted file mode 100644
index 8864909c9e..0000000000
--- a/src/lib/libssl/ssl_clnt.c
+++ /dev/null
@@ -1,2770 +0,0 @@
1/* $OpenBSD: ssl_clnt.c,v 1.107 2021/06/30 09:59:07 jsing 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) 1998-2007 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 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113 *
114 * Portions of the attached software ("Contribution") are developed by
115 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
116 *
117 * The Contribution is licensed pursuant to the OpenSSL open source
118 * license provided above.
119 *
120 * ECC cipher suite support in OpenSSL originally written by
121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
122 *
123 */
124/* ====================================================================
125 * Copyright 2005 Nokia. All rights reserved.
126 *
127 * The portions of the attached software ("Contribution") is developed by
128 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
129 * license.
130 *
131 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
132 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
133 * support (see RFC 4279) to OpenSSL.
134 *
135 * No patent licenses or other rights except those expressly stated in
136 * the OpenSSL open source license shall be deemed granted or received
137 * expressly, by implication, estoppel, or otherwise.
138 *
139 * No assurances are provided by Nokia that the Contribution does not
140 * infringe the patent or other intellectual property rights of any third
141 * party or that the license provides you with all the necessary rights
142 * to make use of the Contribution.
143 *
144 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
145 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
146 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
147 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
148 * OTHERWISE.
149 */
150
151#include <limits.h>
152#include <stdint.h>
153#include <stdio.h>
154
155#include <openssl/bn.h>
156#include <openssl/buffer.h>
157#include <openssl/curve25519.h>
158#include <openssl/dh.h>
159#include <openssl/evp.h>
160#include <openssl/md5.h>
161#include <openssl/objects.h>
162#include <openssl/opensslconf.h>
163
164#ifndef OPENSSL_NO_ENGINE
165#include <openssl/engine.h>
166#endif
167#ifndef OPENSSL_NO_GOST
168#include <openssl/gost.h>
169#endif
170
171#include "bytestring.h"
172#include "dtls_locl.h"
173#include "ssl_locl.h"
174#include "ssl_sigalgs.h"
175#include "ssl_tlsext.h"
176
177static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b);
178
179int
180ssl3_connect(SSL *s)
181{
182 void (*cb)(const SSL *ssl, int type, int val) = NULL;
183 int ret = -1;
184 int new_state, state, skip = 0;
185
186 ERR_clear_error();
187 errno = 0;
188
189 if (s->internal->info_callback != NULL)
190 cb = s->internal->info_callback;
191 else if (s->ctx->internal->info_callback != NULL)
192 cb = s->ctx->internal->info_callback;
193
194 s->internal->in_handshake++;
195 if (!SSL_in_init(s) || SSL_in_before(s))
196 SSL_clear(s);
197
198 for (;;) {
199 state = S3I(s)->hs.state;
200
201 switch (S3I(s)->hs.state) {
202 case SSL_ST_RENEGOTIATE:
203 s->internal->renegotiate = 1;
204 S3I(s)->hs.state = SSL_ST_CONNECT;
205 s->ctx->internal->stats.sess_connect_renegotiate++;
206 /* break */
207 case SSL_ST_BEFORE:
208 case SSL_ST_CONNECT:
209 case SSL_ST_BEFORE|SSL_ST_CONNECT:
210 case SSL_ST_OK|SSL_ST_CONNECT:
211
212 s->server = 0;
213 if (cb != NULL)
214 cb(s, SSL_CB_HANDSHAKE_START, 1);
215
216 if (!ssl_legacy_stack_version(s, s->version)) {
217 SSLerror(s, ERR_R_INTERNAL_ERROR);
218 ret = -1;
219 goto end;
220 }
221
222 if (!ssl_supported_tls_version_range(s,
223 &S3I(s)->hs.our_min_tls_version,
224 &S3I(s)->hs.our_max_tls_version)) {
225 SSLerror(s, SSL_R_NO_PROTOCOLS_AVAILABLE);
226 ret = -1;
227 goto end;
228 }
229
230 if (!ssl3_setup_init_buffer(s)) {
231 ret = -1;
232 goto end;
233 }
234 if (!ssl3_setup_buffers(s)) {
235 ret = -1;
236 goto end;
237 }
238 if (!ssl_init_wbio_buffer(s, 0)) {
239 ret = -1;
240 goto end;
241 }
242
243 /* don't push the buffering BIO quite yet */
244
245 if (!tls1_transcript_init(s)) {
246 ret = -1;
247 goto end;
248 }
249
250 S3I(s)->hs.state = SSL3_ST_CW_CLNT_HELLO_A;
251 s->ctx->internal->stats.sess_connect++;
252 s->internal->init_num = 0;
253
254 if (SSL_is_dtls(s)) {
255 /* mark client_random uninitialized */
256 memset(s->s3->client_random, 0,
257 sizeof(s->s3->client_random));
258 D1I(s)->send_cookie = 0;
259 s->internal->hit = 0;
260 }
261 break;
262
263 case SSL3_ST_CW_CLNT_HELLO_A:
264 case SSL3_ST_CW_CLNT_HELLO_B:
265 s->internal->shutdown = 0;
266
267 if (SSL_is_dtls(s)) {
268 /* every DTLS ClientHello resets Finished MAC */
269 tls1_transcript_reset(s);
270
271 dtls1_start_timer(s);
272 }
273
274 ret = ssl3_send_client_hello(s);
275 if (ret <= 0)
276 goto end;
277
278 if (SSL_is_dtls(s) && D1I(s)->send_cookie) {
279 S3I(s)->hs.state = SSL3_ST_CW_FLUSH;
280 S3I(s)->hs.tls12.next_state = SSL3_ST_CR_SRVR_HELLO_A;
281 } else
282 S3I(s)->hs.state = SSL3_ST_CR_SRVR_HELLO_A;
283
284 s->internal->init_num = 0;
285
286 /* turn on buffering for the next lot of output */
287 if (s->bbio != s->wbio)
288 s->wbio = BIO_push(s->bbio, s->wbio);
289
290 break;
291
292 case SSL3_ST_CR_SRVR_HELLO_A:
293 case SSL3_ST_CR_SRVR_HELLO_B:
294 ret = ssl3_get_server_hello(s);
295 if (ret <= 0)
296 goto end;
297
298 if (s->internal->hit) {
299 S3I(s)->hs.state = SSL3_ST_CR_FINISHED_A;
300 if (!SSL_is_dtls(s)) {
301 if (s->internal->tlsext_ticket_expected) {
302 /* receive renewed session ticket */
303 S3I(s)->hs.state = SSL3_ST_CR_SESSION_TICKET_A;
304 }
305
306 /* No client certificate verification. */
307 tls1_transcript_free(s);
308 }
309 } else if (SSL_is_dtls(s)) {
310 S3I(s)->hs.state = DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A;
311 } else {
312 S3I(s)->hs.state = SSL3_ST_CR_CERT_A;
313 }
314 s->internal->init_num = 0;
315 break;
316
317 case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A:
318 case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B:
319 ret = ssl3_get_dtls_hello_verify(s);
320 if (ret <= 0)
321 goto end;
322 dtls1_stop_timer(s);
323 if (D1I(s)->send_cookie) /* start again, with a cookie */
324 S3I(s)->hs.state = SSL3_ST_CW_CLNT_HELLO_A;
325 else
326 S3I(s)->hs.state = SSL3_ST_CR_CERT_A;
327 s->internal->init_num = 0;
328 break;
329
330 case SSL3_ST_CR_CERT_A:
331 case SSL3_ST_CR_CERT_B:
332 ret = ssl3_check_finished(s);
333 if (ret <= 0)
334 goto end;
335 if (ret == 2) {
336 s->internal->hit = 1;
337 if (s->internal->tlsext_ticket_expected)
338 S3I(s)->hs.state = SSL3_ST_CR_SESSION_TICKET_A;
339 else
340 S3I(s)->hs.state = SSL3_ST_CR_FINISHED_A;
341 s->internal->init_num = 0;
342 break;
343 }
344 /* Check if it is anon DH/ECDH. */
345 if (!(S3I(s)->hs.cipher->algorithm_auth &
346 SSL_aNULL)) {
347 ret = ssl3_get_server_certificate(s);
348 if (ret <= 0)
349 goto end;
350 if (s->internal->tlsext_status_expected)
351 S3I(s)->hs.state = SSL3_ST_CR_CERT_STATUS_A;
352 else
353 S3I(s)->hs.state = SSL3_ST_CR_KEY_EXCH_A;
354 } else {
355 skip = 1;
356 S3I(s)->hs.state = SSL3_ST_CR_KEY_EXCH_A;
357 }
358 s->internal->init_num = 0;
359 break;
360
361 case SSL3_ST_CR_KEY_EXCH_A:
362 case SSL3_ST_CR_KEY_EXCH_B:
363 ret = ssl3_get_server_key_exchange(s);
364 if (ret <= 0)
365 goto end;
366 S3I(s)->hs.state = SSL3_ST_CR_CERT_REQ_A;
367 s->internal->init_num = 0;
368
369 /*
370 * At this point we check that we have the
371 * required stuff from the server.
372 */
373 if (!ssl3_check_cert_and_algorithm(s)) {
374 ret = -1;
375 goto end;
376 }
377 break;
378
379 case SSL3_ST_CR_CERT_REQ_A:
380 case SSL3_ST_CR_CERT_REQ_B:
381 ret = ssl3_get_certificate_request(s);
382 if (ret <= 0)
383 goto end;
384 S3I(s)->hs.state = SSL3_ST_CR_SRVR_DONE_A;
385 s->internal->init_num = 0;
386 break;
387
388 case SSL3_ST_CR_SRVR_DONE_A:
389 case SSL3_ST_CR_SRVR_DONE_B:
390 ret = ssl3_get_server_done(s);
391 if (ret <= 0)
392 goto end;
393 if (SSL_is_dtls(s))
394 dtls1_stop_timer(s);
395 if (S3I(s)->hs.tls12.cert_request)
396 S3I(s)->hs.state = SSL3_ST_CW_CERT_A;
397 else
398 S3I(s)->hs.state = SSL3_ST_CW_KEY_EXCH_A;
399 s->internal->init_num = 0;
400
401 break;
402
403 case SSL3_ST_CW_CERT_A:
404 case SSL3_ST_CW_CERT_B:
405 case SSL3_ST_CW_CERT_C:
406 case SSL3_ST_CW_CERT_D:
407 if (SSL_is_dtls(s))
408 dtls1_start_timer(s);
409 ret = ssl3_send_client_certificate(s);
410 if (ret <= 0)
411 goto end;
412 S3I(s)->hs.state = SSL3_ST_CW_KEY_EXCH_A;
413 s->internal->init_num = 0;
414 break;
415
416 case SSL3_ST_CW_KEY_EXCH_A:
417 case SSL3_ST_CW_KEY_EXCH_B:
418 if (SSL_is_dtls(s))
419 dtls1_start_timer(s);
420 ret = ssl3_send_client_key_exchange(s);
421 if (ret <= 0)
422 goto end;
423 /*
424 * EAY EAY EAY need to check for DH fix cert
425 * sent back
426 */
427 /*
428 * For TLS, cert_req is set to 2, so a cert chain
429 * of nothing is sent, but no verify packet is sent
430 */
431 /*
432 * XXX: For now, we do not support client
433 * authentication in ECDH cipher suites with
434 * ECDH (rather than ECDSA) certificates.
435 * We need to skip the certificate verify
436 * message when client's ECDH public key is sent
437 * inside the client certificate.
438 */
439 if (S3I(s)->hs.tls12.cert_request == 1) {
440 S3I(s)->hs.state = SSL3_ST_CW_CERT_VRFY_A;
441 } else {
442 S3I(s)->hs.state = SSL3_ST_CW_CHANGE_A;
443 S3I(s)->change_cipher_spec = 0;
444 }
445 if (!SSL_is_dtls(s)) {
446 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
447 S3I(s)->hs.state = SSL3_ST_CW_CHANGE_A;
448 S3I(s)->change_cipher_spec = 0;
449 }
450 }
451
452 s->internal->init_num = 0;
453 break;
454
455 case SSL3_ST_CW_CERT_VRFY_A:
456 case SSL3_ST_CW_CERT_VRFY_B:
457 if (SSL_is_dtls(s))
458 dtls1_start_timer(s);
459 ret = ssl3_send_client_verify(s);
460 if (ret <= 0)
461 goto end;
462 S3I(s)->hs.state = SSL3_ST_CW_CHANGE_A;
463 s->internal->init_num = 0;
464 S3I(s)->change_cipher_spec = 0;
465 break;
466
467 case SSL3_ST_CW_CHANGE_A:
468 case SSL3_ST_CW_CHANGE_B:
469 if (SSL_is_dtls(s) && !s->internal->hit)
470 dtls1_start_timer(s);
471 ret = ssl3_send_change_cipher_spec(s,
472 SSL3_ST_CW_CHANGE_A, SSL3_ST_CW_CHANGE_B);
473 if (ret <= 0)
474 goto end;
475
476 S3I(s)->hs.state = SSL3_ST_CW_FINISHED_A;
477 s->internal->init_num = 0;
478 s->session->cipher = S3I(s)->hs.cipher;
479
480 if (!tls1_setup_key_block(s)) {
481 ret = -1;
482 goto end;
483 }
484 if (!tls1_change_write_cipher_state(s)) {
485 ret = -1;
486 goto end;
487 }
488 break;
489
490 case SSL3_ST_CW_FINISHED_A:
491 case SSL3_ST_CW_FINISHED_B:
492 if (SSL_is_dtls(s) && !s->internal->hit)
493 dtls1_start_timer(s);
494 ret = ssl3_send_finished(s, SSL3_ST_CW_FINISHED_A,
495 SSL3_ST_CW_FINISHED_B);
496 if (ret <= 0)
497 goto end;
498 if (!SSL_is_dtls(s))
499 s->s3->flags |= SSL3_FLAGS_CCS_OK;
500 S3I(s)->hs.state = SSL3_ST_CW_FLUSH;
501
502 /* clear flags */
503 if (s->internal->hit) {
504 S3I(s)->hs.tls12.next_state = SSL_ST_OK;
505 } else {
506 /* Allow NewSessionTicket if ticket expected */
507 if (s->internal->tlsext_ticket_expected)
508 S3I(s)->hs.tls12.next_state =
509 SSL3_ST_CR_SESSION_TICKET_A;
510 else
511 S3I(s)->hs.tls12.next_state =
512 SSL3_ST_CR_FINISHED_A;
513 }
514 s->internal->init_num = 0;
515 break;
516
517 case SSL3_ST_CR_SESSION_TICKET_A:
518 case SSL3_ST_CR_SESSION_TICKET_B:
519 ret = ssl3_get_new_session_ticket(s);
520 if (ret <= 0)
521 goto end;
522 S3I(s)->hs.state = SSL3_ST_CR_FINISHED_A;
523 s->internal->init_num = 0;
524 break;
525
526 case SSL3_ST_CR_CERT_STATUS_A:
527 case SSL3_ST_CR_CERT_STATUS_B:
528 ret = ssl3_get_cert_status(s);
529 if (ret <= 0)
530 goto end;
531 S3I(s)->hs.state = SSL3_ST_CR_KEY_EXCH_A;
532 s->internal->init_num = 0;
533 break;
534
535 case SSL3_ST_CR_FINISHED_A:
536 case SSL3_ST_CR_FINISHED_B:
537 if (SSL_is_dtls(s))
538 D1I(s)->change_cipher_spec_ok = 1;
539 else
540 s->s3->flags |= SSL3_FLAGS_CCS_OK;
541 ret = ssl3_get_finished(s, SSL3_ST_CR_FINISHED_A,
542 SSL3_ST_CR_FINISHED_B);
543 if (ret <= 0)
544 goto end;
545 if (SSL_is_dtls(s))
546 dtls1_stop_timer(s);
547
548 if (s->internal->hit)
549 S3I(s)->hs.state = SSL3_ST_CW_CHANGE_A;
550 else
551 S3I(s)->hs.state = SSL_ST_OK;
552 s->internal->init_num = 0;
553 break;
554
555 case SSL3_ST_CW_FLUSH:
556 s->internal->rwstate = SSL_WRITING;
557 if (BIO_flush(s->wbio) <= 0) {
558 if (SSL_is_dtls(s)) {
559 /* If the write error was fatal, stop trying */
560 if (!BIO_should_retry(s->wbio)) {
561 s->internal->rwstate = SSL_NOTHING;
562 S3I(s)->hs.state = S3I(s)->hs.tls12.next_state;
563 }
564 }
565 ret = -1;
566 goto end;
567 }
568 s->internal->rwstate = SSL_NOTHING;
569 S3I(s)->hs.state = S3I(s)->hs.tls12.next_state;
570 break;
571
572 case SSL_ST_OK:
573 /* clean a few things up */
574 tls1_cleanup_key_block(s);
575
576 if (S3I(s)->handshake_transcript != NULL) {
577 SSLerror(s, ERR_R_INTERNAL_ERROR);
578 ret = -1;
579 goto end;
580 }
581
582 if (!SSL_is_dtls(s))
583 ssl3_release_init_buffer(s);
584
585 ssl_free_wbio_buffer(s);
586
587 s->internal->init_num = 0;
588 s->internal->renegotiate = 0;
589 s->internal->new_session = 0;
590
591 ssl_update_cache(s, SSL_SESS_CACHE_CLIENT);
592 if (s->internal->hit)
593 s->ctx->internal->stats.sess_hit++;
594
595 ret = 1;
596 /* s->server=0; */
597 s->internal->handshake_func = ssl3_connect;
598 s->ctx->internal->stats.sess_connect_good++;
599
600 if (cb != NULL)
601 cb(s, SSL_CB_HANDSHAKE_DONE, 1);
602
603 if (SSL_is_dtls(s)) {
604 /* done with handshaking */
605 D1I(s)->handshake_read_seq = 0;
606 D1I(s)->next_handshake_write_seq = 0;
607 }
608
609 goto end;
610 /* break; */
611
612 default:
613 SSLerror(s, SSL_R_UNKNOWN_STATE);
614 ret = -1;
615 goto end;
616 /* break; */
617 }
618
619 /* did we do anything */
620 if (!S3I(s)->hs.tls12.reuse_message && !skip) {
621 if (s->internal->debug) {
622 if ((ret = BIO_flush(s->wbio)) <= 0)
623 goto end;
624 }
625
626 if ((cb != NULL) && (S3I(s)->hs.state != state)) {
627 new_state = S3I(s)->hs.state;
628 S3I(s)->hs.state = state;
629 cb(s, SSL_CB_CONNECT_LOOP, 1);
630 S3I(s)->hs.state = new_state;
631 }
632 }
633 skip = 0;
634 }
635
636 end:
637 s->internal->in_handshake--;
638 if (cb != NULL)
639 cb(s, SSL_CB_CONNECT_EXIT, ret);
640
641 return (ret);
642}
643
644int
645ssl3_send_client_hello(SSL *s)
646{
647 CBB cbb, client_hello, session_id, cookie, cipher_suites;
648 CBB compression_methods;
649 uint16_t max_version;
650 size_t sl;
651
652 memset(&cbb, 0, sizeof(cbb));
653
654 if (S3I(s)->hs.state == SSL3_ST_CW_CLNT_HELLO_A) {
655 SSL_SESSION *sess = s->session;
656
657 if (!ssl_max_supported_version(s, &max_version)) {
658 SSLerror(s, SSL_R_NO_PROTOCOLS_AVAILABLE);
659 return (-1);
660 }
661 s->client_version = s->version = max_version;
662
663 if (sess == NULL ||
664 sess->ssl_version != s->version ||
665 (!sess->session_id_length && !sess->tlsext_tick) ||
666 sess->internal->not_resumable) {
667 if (!ssl_get_new_session(s, 0))
668 goto err;
669 }
670 /* else use the pre-loaded session */
671
672 /*
673 * If a DTLS ClientHello message is being resent after a
674 * HelloVerifyRequest, we must retain the original client
675 * random value.
676 */
677 if (!SSL_is_dtls(s) || D1I(s)->send_cookie == 0)
678 arc4random_buf(s->s3->client_random, SSL3_RANDOM_SIZE);
679
680 if (!ssl3_handshake_msg_start(s, &cbb, &client_hello,
681 SSL3_MT_CLIENT_HELLO))
682 goto err;
683
684 /*
685 * Version indicates the negotiated version: for example from
686 * an SSLv2/v3 compatible client hello). The client_version
687 * field is the maximum version we permit and it is also
688 * used in RSA encrypted premaster secrets. Some servers can
689 * choke if we initially report a higher version then
690 * renegotiate to a lower one in the premaster secret. This
691 * didn't happen with TLS 1.0 as most servers supported it
692 * but it can with TLS 1.1 or later if the server only supports
693 * 1.0.
694 *
695 * Possible scenario with previous logic:
696 * 1. Client hello indicates TLS 1.2
697 * 2. Server hello says TLS 1.0
698 * 3. RSA encrypted premaster secret uses 1.2.
699 * 4. Handhaked proceeds using TLS 1.0.
700 * 5. Server sends hello request to renegotiate.
701 * 6. Client hello indicates TLS v1.0 as we now
702 * know that is maximum server supports.
703 * 7. Server chokes on RSA encrypted premaster secret
704 * containing version 1.0.
705 *
706 * For interoperability it should be OK to always use the
707 * maximum version we support in client hello and then rely
708 * on the checking of version to ensure the servers isn't
709 * being inconsistent: for example initially negotiating with
710 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
711 * client_version in client hello and not resetting it to
712 * the negotiated version.
713 */
714 if (!CBB_add_u16(&client_hello, s->client_version))
715 goto err;
716
717 /* Random stuff */
718 if (!CBB_add_bytes(&client_hello, s->s3->client_random,
719 sizeof(s->s3->client_random)))
720 goto err;
721
722 /* Session ID */
723 if (!CBB_add_u8_length_prefixed(&client_hello, &session_id))
724 goto err;
725 if (!s->internal->new_session &&
726 s->session->session_id_length > 0) {
727 sl = s->session->session_id_length;
728 if (sl > sizeof(s->session->session_id)) {
729 SSLerror(s, ERR_R_INTERNAL_ERROR);
730 goto err;
731 }
732 if (!CBB_add_bytes(&session_id,
733 s->session->session_id, sl))
734 goto err;
735 }
736
737 /* DTLS Cookie. */
738 if (SSL_is_dtls(s)) {
739 if (D1I(s)->cookie_len > sizeof(D1I(s)->cookie)) {
740 SSLerror(s, ERR_R_INTERNAL_ERROR);
741 goto err;
742 }
743 if (!CBB_add_u8_length_prefixed(&client_hello, &cookie))
744 goto err;
745 if (!CBB_add_bytes(&cookie, D1I(s)->cookie,
746 D1I(s)->cookie_len))
747 goto err;
748 }
749
750 /* Ciphers supported */
751 if (!CBB_add_u16_length_prefixed(&client_hello, &cipher_suites))
752 return 0;
753 if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s),
754 &cipher_suites)) {
755 SSLerror(s, SSL_R_NO_CIPHERS_AVAILABLE);
756 goto err;
757 }
758
759 /* Add in compression methods (null) */
760 if (!CBB_add_u8_length_prefixed(&client_hello,
761 &compression_methods))
762 goto err;
763 if (!CBB_add_u8(&compression_methods, 0))
764 goto err;
765
766 /* TLS extensions */
767 if (!tlsext_client_build(s, SSL_TLSEXT_MSG_CH, &client_hello)) {
768 SSLerror(s, ERR_R_INTERNAL_ERROR);
769 goto err;
770 }
771
772 if (!ssl3_handshake_msg_finish(s, &cbb))
773 goto err;
774
775 S3I(s)->hs.state = SSL3_ST_CW_CLNT_HELLO_B;
776 }
777
778 /* SSL3_ST_CW_CLNT_HELLO_B */
779 return (ssl3_handshake_write(s));
780
781 err:
782 CBB_cleanup(&cbb);
783
784 return (-1);
785}
786
787int
788ssl3_get_dtls_hello_verify(SSL *s)
789{
790 long n;
791 int al, ok = 0;
792 size_t cookie_len;
793 uint16_t ssl_version;
794 CBS hello_verify_request, cookie;
795
796 n = ssl3_get_message(s, DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A,
797 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B, -1, s->internal->max_cert_list, &ok);
798 if (!ok)
799 return ((int)n);
800
801 if (S3I(s)->hs.tls12.message_type != DTLS1_MT_HELLO_VERIFY_REQUEST) {
802 D1I(s)->send_cookie = 0;
803 S3I(s)->hs.tls12.reuse_message = 1;
804 return (1);
805 }
806
807 if (n < 0)
808 goto decode_err;
809
810 CBS_init(&hello_verify_request, s->internal->init_msg, n);
811
812 if (!CBS_get_u16(&hello_verify_request, &ssl_version))
813 goto decode_err;
814 if (!CBS_get_u8_length_prefixed(&hello_verify_request, &cookie))
815 goto decode_err;
816 if (CBS_len(&hello_verify_request) != 0)
817 goto decode_err;
818
819 /*
820 * Per RFC 6347 section 4.2.1, the HelloVerifyRequest should always
821 * contain DTLSv1.0 the version that is going to be negotiated.
822 * Tolerate DTLSv1.2 just in case.
823 */
824 if (ssl_version != DTLS1_VERSION && ssl_version != DTLS1_2_VERSION) {
825 SSLerror(s, SSL_R_WRONG_SSL_VERSION);
826 s->version = (s->version & 0xff00) | (ssl_version & 0xff);
827 al = SSL_AD_PROTOCOL_VERSION;
828 goto fatal_err;
829 }
830
831 if (!CBS_write_bytes(&cookie, D1I(s)->cookie,
832 sizeof(D1I(s)->cookie), &cookie_len)) {
833 D1I(s)->cookie_len = 0;
834 al = SSL_AD_ILLEGAL_PARAMETER;
835 goto fatal_err;
836 }
837 D1I(s)->cookie_len = cookie_len;
838 D1I(s)->send_cookie = 1;
839
840 return 1;
841
842 decode_err:
843 al = SSL_AD_DECODE_ERROR;
844 fatal_err:
845 ssl3_send_alert(s, SSL3_AL_FATAL, al);
846 return -1;
847}
848
849int
850ssl3_get_server_hello(SSL *s)
851{
852 CBS cbs, server_random, session_id;
853 uint16_t server_version, cipher_suite;
854 uint8_t compression_method;
855 const SSL_CIPHER *cipher;
856 const SSL_METHOD *method;
857 unsigned long alg_k;
858 size_t outlen;
859 int al, ok;
860 long n;
861
862 s->internal->first_packet = 1;
863 n = ssl3_get_message(s, SSL3_ST_CR_SRVR_HELLO_A,
864 SSL3_ST_CR_SRVR_HELLO_B, -1, 20000, /* ?? */ &ok);
865 if (!ok)
866 return ((int)n);
867 s->internal->first_packet = 0;
868
869 if (n < 0)
870 goto decode_err;
871
872 CBS_init(&cbs, s->internal->init_msg, n);
873
874 if (SSL_is_dtls(s)) {
875 if (S3I(s)->hs.tls12.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) {
876 if (D1I(s)->send_cookie == 0) {
877 S3I(s)->hs.tls12.reuse_message = 1;
878 return (1);
879 } else {
880 /* Already sent a cookie. */
881 al = SSL_AD_UNEXPECTED_MESSAGE;
882 SSLerror(s, SSL_R_BAD_MESSAGE_TYPE);
883 goto fatal_err;
884 }
885 }
886 }
887
888 if (S3I(s)->hs.tls12.message_type != SSL3_MT_SERVER_HELLO) {
889 al = SSL_AD_UNEXPECTED_MESSAGE;
890 SSLerror(s, SSL_R_BAD_MESSAGE_TYPE);
891 goto fatal_err;
892 }
893
894 if (!CBS_get_u16(&cbs, &server_version))
895 goto decode_err;
896
897 if (!ssl_check_version_from_server(s, server_version)) {
898 SSLerror(s, SSL_R_WRONG_SSL_VERSION);
899 s->version = (s->version & 0xff00) | (server_version & 0xff);
900 al = SSL_AD_PROTOCOL_VERSION;
901 goto fatal_err;
902 }
903 s->version = server_version;
904
905 S3I(s)->hs.negotiated_tls_version = ssl_tls_version(server_version);
906 if (S3I(s)->hs.negotiated_tls_version == 0) {
907 SSLerror(s, ERR_R_INTERNAL_ERROR);
908 goto err;
909 }
910
911 if ((method = ssl_get_method(server_version)) == NULL) {
912 SSLerror(s, ERR_R_INTERNAL_ERROR);
913 goto err;
914 }
915 s->method = method;
916
917 /* Server random. */
918 if (!CBS_get_bytes(&cbs, &server_random, SSL3_RANDOM_SIZE))
919 goto decode_err;
920 if (!CBS_write_bytes(&server_random, s->s3->server_random,
921 sizeof(s->s3->server_random), NULL))
922 goto err;
923
924 if (S3I(s)->hs.our_max_tls_version >= TLS1_2_VERSION &&
925 S3I(s)->hs.negotiated_tls_version < S3I(s)->hs.our_max_tls_version) {
926 /*
927 * RFC 8446 section 4.1.3. We must not downgrade if the server
928 * random value contains the TLS 1.2 or TLS 1.1 magical value.
929 */
930 if (!CBS_skip(&server_random,
931 CBS_len(&server_random) - sizeof(tls13_downgrade_12)))
932 goto err;
933 if (S3I(s)->hs.negotiated_tls_version == TLS1_2_VERSION &&
934 CBS_mem_equal(&server_random, tls13_downgrade_12,
935 sizeof(tls13_downgrade_12))) {
936 al = SSL_AD_ILLEGAL_PARAMETER;
937 SSLerror(s, SSL_R_INAPPROPRIATE_FALLBACK);
938 goto fatal_err;
939 }
940 if (CBS_mem_equal(&server_random, tls13_downgrade_11,
941 sizeof(tls13_downgrade_11))) {
942 al = SSL_AD_ILLEGAL_PARAMETER;
943 SSLerror(s, SSL_R_INAPPROPRIATE_FALLBACK);
944 goto fatal_err;
945 }
946 }
947
948 /* Session ID. */
949 if (!CBS_get_u8_length_prefixed(&cbs, &session_id))
950 goto decode_err;
951
952 if (CBS_len(&session_id) > SSL3_SESSION_ID_SIZE) {
953 al = SSL_AD_ILLEGAL_PARAMETER;
954 SSLerror(s, SSL_R_SSL3_SESSION_ID_TOO_LONG);
955 goto fatal_err;
956 }
957
958 /* Cipher suite. */
959 if (!CBS_get_u16(&cbs, &cipher_suite))
960 goto decode_err;
961
962 /*
963 * Check if we want to resume the session based on external
964 * pre-shared secret.
965 */
966 if (s->internal->tls_session_secret_cb) {
967 SSL_CIPHER *pref_cipher = NULL;
968 s->session->master_key_length = sizeof(s->session->master_key);
969 if (s->internal->tls_session_secret_cb(s, s->session->master_key,
970 &s->session->master_key_length, NULL, &pref_cipher,
971 s->internal->tls_session_secret_cb_arg)) {
972 s->session->cipher = pref_cipher ? pref_cipher :
973 ssl3_get_cipher_by_value(cipher_suite);
974 s->s3->flags |= SSL3_FLAGS_CCS_OK;
975 }
976 }
977
978 if (s->session->session_id_length != 0 &&
979 CBS_mem_equal(&session_id, s->session->session_id,
980 s->session->session_id_length)) {
981 if (s->sid_ctx_length != s->session->sid_ctx_length ||
982 timingsafe_memcmp(s->session->sid_ctx,
983 s->sid_ctx, s->sid_ctx_length) != 0) {
984 /* actually a client application bug */
985 al = SSL_AD_ILLEGAL_PARAMETER;
986 SSLerror(s, SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
987 goto fatal_err;
988 }
989 s->s3->flags |= SSL3_FLAGS_CCS_OK;
990 s->internal->hit = 1;
991 } else {
992 /* a miss or crap from the other end */
993
994 /* If we were trying for session-id reuse, make a new
995 * SSL_SESSION so we don't stuff up other people */
996 s->internal->hit = 0;
997 if (s->session->session_id_length > 0) {
998 if (!ssl_get_new_session(s, 0)) {
999 al = SSL_AD_INTERNAL_ERROR;
1000 goto fatal_err;
1001 }
1002 }
1003
1004 /*
1005 * XXX - improve the handling for the case where there is a
1006 * zero length session identifier.
1007 */
1008 if (!CBS_write_bytes(&session_id, s->session->session_id,
1009 sizeof(s->session->session_id), &outlen))
1010 goto err;
1011 s->session->session_id_length = outlen;
1012
1013 s->session->ssl_version = s->version;
1014 }
1015
1016 if ((cipher = ssl3_get_cipher_by_value(cipher_suite)) == NULL) {
1017 al = SSL_AD_ILLEGAL_PARAMETER;
1018 SSLerror(s, SSL_R_UNKNOWN_CIPHER_RETURNED);
1019 goto fatal_err;
1020 }
1021
1022 /* TLS v1.2 only ciphersuites require v1.2 or later. */
1023 if ((cipher->algorithm_ssl & SSL_TLSV1_2) &&
1024 S3I(s)->hs.negotiated_tls_version < TLS1_2_VERSION) {
1025 al = SSL_AD_ILLEGAL_PARAMETER;
1026 SSLerror(s, SSL_R_WRONG_CIPHER_RETURNED);
1027 goto fatal_err;
1028 }
1029
1030 if (!ssl_cipher_in_list(SSL_get_ciphers(s), cipher)) {
1031 /* we did not say we would use this cipher */
1032 al = SSL_AD_ILLEGAL_PARAMETER;
1033 SSLerror(s, SSL_R_WRONG_CIPHER_RETURNED);
1034 goto fatal_err;
1035 }
1036
1037 /*
1038 * Depending on the session caching (internal/external), the cipher
1039 * and/or cipher_id values may not be set. Make sure that
1040 * cipher_id is set and use it for comparison.
1041 */
1042 if (s->session->cipher)
1043 s->session->cipher_id = s->session->cipher->id;
1044 if (s->internal->hit && (s->session->cipher_id != cipher->id)) {
1045 al = SSL_AD_ILLEGAL_PARAMETER;
1046 SSLerror(s, SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1047 goto fatal_err;
1048 }
1049 S3I(s)->hs.cipher = cipher;
1050
1051 if (!tls1_transcript_hash_init(s))
1052 goto err;
1053
1054 /*
1055 * Don't digest cached records if no sigalgs: we may need them for
1056 * client authentication.
1057 */
1058 alg_k = S3I(s)->hs.cipher->algorithm_mkey;
1059 if (!(SSL_USE_SIGALGS(s) || (alg_k & SSL_kGOST)))
1060 tls1_transcript_free(s);
1061
1062 if (!CBS_get_u8(&cbs, &compression_method))
1063 goto decode_err;
1064
1065 if (compression_method != 0) {
1066 al = SSL_AD_ILLEGAL_PARAMETER;
1067 SSLerror(s, SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1068 goto fatal_err;
1069 }
1070
1071 if (!tlsext_client_parse(s, SSL_TLSEXT_MSG_SH, &cbs, &al)) {
1072 SSLerror(s, SSL_R_PARSE_TLSEXT);
1073 goto fatal_err;
1074 }
1075
1076 /*
1077 * Determine if we need to see RI. Strictly speaking if we want to
1078 * avoid an attack we should *always* see RI even on initial server
1079 * hello because the client doesn't see any renegotiation during an
1080 * attack. However this would mean we could not connect to any server
1081 * which doesn't support RI so for the immediate future tolerate RI
1082 * absence on initial connect only.
1083 */
1084 if (!S3I(s)->renegotiate_seen &&
1085 !(s->internal->options & SSL_OP_LEGACY_SERVER_CONNECT)) {
1086 al = SSL_AD_HANDSHAKE_FAILURE;
1087 SSLerror(s, SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
1088 goto fatal_err;
1089 }
1090
1091 if (ssl_check_serverhello_tlsext(s) <= 0) {
1092 SSLerror(s, SSL_R_SERVERHELLO_TLSEXT);
1093 goto err;
1094 }
1095
1096 return (1);
1097
1098 decode_err:
1099 /* wrong packet length */
1100 al = SSL_AD_DECODE_ERROR;
1101 SSLerror(s, SSL_R_BAD_PACKET_LENGTH);
1102 fatal_err:
1103 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1104 err:
1105 return (-1);
1106}
1107
1108int
1109ssl3_get_server_certificate(SSL *s)
1110{
1111 int al, i, ok, ret = -1;
1112 long n;
1113 CBS cbs, cert_list;
1114 X509 *x = NULL;
1115 const unsigned char *q;
1116 STACK_OF(X509) *sk = NULL;
1117 SESS_CERT *sc;
1118 EVP_PKEY *pkey = NULL;
1119
1120 n = ssl3_get_message(s, SSL3_ST_CR_CERT_A,
1121 SSL3_ST_CR_CERT_B, -1, s->internal->max_cert_list, &ok);
1122 if (!ok)
1123 return ((int)n);
1124
1125 if (S3I(s)->hs.tls12.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) {
1126 S3I(s)->hs.tls12.reuse_message = 1;
1127 return (1);
1128 }
1129
1130 if (S3I(s)->hs.tls12.message_type != SSL3_MT_CERTIFICATE) {
1131 al = SSL_AD_UNEXPECTED_MESSAGE;
1132 SSLerror(s, SSL_R_BAD_MESSAGE_TYPE);
1133 goto fatal_err;
1134 }
1135
1136
1137 if ((sk = sk_X509_new_null()) == NULL) {
1138 SSLerror(s, ERR_R_MALLOC_FAILURE);
1139 goto err;
1140 }
1141
1142 if (n < 0)
1143 goto decode_err;
1144
1145 CBS_init(&cbs, s->internal->init_msg, n);
1146 if (CBS_len(&cbs) < 3)
1147 goto decode_err;
1148
1149 if (!CBS_get_u24_length_prefixed(&cbs, &cert_list) ||
1150 CBS_len(&cbs) != 0) {
1151 al = SSL_AD_DECODE_ERROR;
1152 SSLerror(s, SSL_R_LENGTH_MISMATCH);
1153 goto fatal_err;
1154 }
1155
1156 while (CBS_len(&cert_list) > 0) {
1157 CBS cert;
1158
1159 if (CBS_len(&cert_list) < 3)
1160 goto decode_err;
1161 if (!CBS_get_u24_length_prefixed(&cert_list, &cert)) {
1162 al = SSL_AD_DECODE_ERROR;
1163 SSLerror(s, SSL_R_CERT_LENGTH_MISMATCH);
1164 goto fatal_err;
1165 }
1166
1167 q = CBS_data(&cert);
1168 x = d2i_X509(NULL, &q, CBS_len(&cert));
1169 if (x == NULL) {
1170 al = SSL_AD_BAD_CERTIFICATE;
1171 SSLerror(s, ERR_R_ASN1_LIB);
1172 goto fatal_err;
1173 }
1174 if (q != CBS_data(&cert) + CBS_len(&cert)) {
1175 al = SSL_AD_DECODE_ERROR;
1176 SSLerror(s, SSL_R_CERT_LENGTH_MISMATCH);
1177 goto fatal_err;
1178 }
1179 if (!sk_X509_push(sk, x)) {
1180 SSLerror(s, ERR_R_MALLOC_FAILURE);
1181 goto err;
1182 }
1183 x = NULL;
1184 }
1185
1186 i = ssl_verify_cert_chain(s, sk);
1187 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)) {
1188 al = ssl_verify_alarm_type(s->verify_result);
1189 SSLerror(s, SSL_R_CERTIFICATE_VERIFY_FAILED);
1190 goto fatal_err;
1191
1192 }
1193 ERR_clear_error(); /* but we keep s->verify_result */
1194
1195 sc = ssl_sess_cert_new();
1196 if (sc == NULL)
1197 goto err;
1198 ssl_sess_cert_free(SSI(s)->sess_cert);
1199 SSI(s)->sess_cert = sc;
1200
1201 sc->cert_chain = sk;
1202 /*
1203 * Inconsistency alert: cert_chain does include the peer's
1204 * certificate, which we don't include in s3_srvr.c
1205 */
1206 x = sk_X509_value(sk, 0);
1207 sk = NULL;
1208 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1209
1210 pkey = X509_get_pubkey(x);
1211
1212 if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) {
1213 x = NULL;
1214 al = SSL3_AL_FATAL;
1215 SSLerror(s, SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1216 goto fatal_err;
1217 }
1218
1219 i = ssl_cert_type(x, pkey);
1220 if (i < 0) {
1221 x = NULL;
1222 al = SSL3_AL_FATAL;
1223 SSLerror(s, SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1224 goto fatal_err;
1225 }
1226
1227 sc->peer_cert_type = i;
1228 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
1229 /*
1230 * Why would the following ever happen?
1231 * We just created sc a couple of lines ago.
1232 */
1233 X509_free(sc->peer_pkeys[i].x509);
1234 sc->peer_pkeys[i].x509 = x;
1235 sc->peer_key = &(sc->peer_pkeys[i]);
1236
1237 X509_free(s->session->peer);
1238 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
1239 s->session->peer = x;
1240 s->session->verify_result = s->verify_result;
1241
1242 x = NULL;
1243 ret = 1;
1244
1245 if (0) {
1246 decode_err:
1247 /* wrong packet length */
1248 al = SSL_AD_DECODE_ERROR;
1249 SSLerror(s, SSL_R_BAD_PACKET_LENGTH);
1250 fatal_err:
1251 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1252 }
1253 err:
1254 EVP_PKEY_free(pkey);
1255 X509_free(x);
1256 sk_X509_pop_free(sk, X509_free);
1257
1258 return (ret);
1259}
1260
1261static int
1262ssl3_get_server_kex_dhe(SSL *s, EVP_PKEY **pkey, CBS *cbs)
1263{
1264 CBS dhp, dhg, dhpk;
1265 BN_CTX *bn_ctx = NULL;
1266 SESS_CERT *sc = NULL;
1267 DH *dh = NULL;
1268 long alg_a;
1269 int al;
1270
1271 alg_a = S3I(s)->hs.cipher->algorithm_auth;
1272 sc = SSI(s)->sess_cert;
1273
1274 if ((dh = DH_new()) == NULL) {
1275 SSLerror(s, ERR_R_DH_LIB);
1276 goto err;
1277 }
1278
1279 if (!CBS_get_u16_length_prefixed(cbs, &dhp))
1280 goto decode_err;
1281 if ((dh->p = BN_bin2bn(CBS_data(&dhp), CBS_len(&dhp), NULL)) == NULL) {
1282 SSLerror(s, ERR_R_BN_LIB);
1283 goto err;
1284 }
1285
1286 if (!CBS_get_u16_length_prefixed(cbs, &dhg))
1287 goto decode_err;
1288 if ((dh->g = BN_bin2bn(CBS_data(&dhg), CBS_len(&dhg), NULL)) == NULL) {
1289 SSLerror(s, ERR_R_BN_LIB);
1290 goto err;
1291 }
1292
1293 if (!CBS_get_u16_length_prefixed(cbs, &dhpk))
1294 goto decode_err;
1295 if ((dh->pub_key = BN_bin2bn(CBS_data(&dhpk), CBS_len(&dhpk),
1296 NULL)) == NULL) {
1297 SSLerror(s, ERR_R_BN_LIB);
1298 goto err;
1299 }
1300
1301 /*
1302 * Check the strength of the DH key just constructed.
1303 * Discard keys weaker than 1024 bits.
1304 */
1305 if (DH_size(dh) < 1024 / 8) {
1306 SSLerror(s, SSL_R_BAD_DH_P_LENGTH);
1307 goto err;
1308 }
1309
1310 if (alg_a & SSL_aRSA)
1311 *pkey = X509_get_pubkey(sc->peer_pkeys[SSL_PKEY_RSA].x509);
1312 else
1313 /* XXX - Anonymous DH, so no certificate or pkey. */
1314 *pkey = NULL;
1315
1316 sc->peer_dh_tmp = dh;
1317
1318 return (1);
1319
1320 decode_err:
1321 al = SSL_AD_DECODE_ERROR;
1322 SSLerror(s, SSL_R_BAD_PACKET_LENGTH);
1323 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1324
1325 err:
1326 DH_free(dh);
1327 BN_CTX_free(bn_ctx);
1328
1329 return (-1);
1330}
1331
1332static int
1333ssl3_get_server_kex_ecdhe_ecp(SSL *s, SESS_CERT *sc, int nid, CBS *public)
1334{
1335 EC_KEY *ecdh = NULL;
1336 int ret = -1;
1337
1338 /* Extract the server's ephemeral ECDH public key. */
1339 if ((ecdh = EC_KEY_new()) == NULL) {
1340 SSLerror(s, ERR_R_MALLOC_FAILURE);
1341 goto err;
1342 }
1343 if (!ssl_kex_peer_public_ecdhe_ecp(ecdh, nid, public)) {
1344 SSLerror(s, SSL_R_BAD_ECPOINT);
1345 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1346 goto err;
1347 }
1348
1349 sc->peer_nid = nid;
1350 sc->peer_ecdh_tmp = ecdh;
1351 ecdh = NULL;
1352
1353 ret = 1;
1354
1355 err:
1356 EC_KEY_free(ecdh);
1357
1358 return (ret);
1359}
1360
1361static int
1362ssl3_get_server_kex_ecdhe_ecx(SSL *s, SESS_CERT *sc, int nid, CBS *public)
1363{
1364 size_t outlen;
1365
1366 if (nid != NID_X25519) {
1367 SSLerror(s, ERR_R_INTERNAL_ERROR);
1368 goto err;
1369 }
1370
1371 if (CBS_len(public) != X25519_KEY_LENGTH) {
1372 SSLerror(s, SSL_R_BAD_ECPOINT);
1373 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1374 goto err;
1375 }
1376
1377 if (!CBS_stow(public, &sc->peer_x25519_tmp, &outlen)) {
1378 SSLerror(s, ERR_R_MALLOC_FAILURE);
1379 goto err;
1380 }
1381
1382 return (1);
1383
1384 err:
1385 return (-1);
1386}
1387
1388static int
1389ssl3_get_server_kex_ecdhe(SSL *s, EVP_PKEY **pkey, CBS *cbs)
1390{
1391 CBS public;
1392 uint8_t curve_type;
1393 uint16_t curve_id;
1394 SESS_CERT *sc;
1395 long alg_a;
1396 int nid;
1397 int al;
1398
1399 alg_a = S3I(s)->hs.cipher->algorithm_auth;
1400 sc = SSI(s)->sess_cert;
1401
1402 /* Only named curves are supported. */
1403 if (!CBS_get_u8(cbs, &curve_type) ||
1404 curve_type != NAMED_CURVE_TYPE ||
1405 !CBS_get_u16(cbs, &curve_id)) {
1406 al = SSL_AD_DECODE_ERROR;
1407 SSLerror(s, SSL_R_LENGTH_TOO_SHORT);
1408 goto fatal_err;
1409 }
1410
1411 /*
1412 * Check that the curve is one of our preferences - if it is not,
1413 * the server has sent us an invalid curve.
1414 */
1415 if (tls1_check_curve(s, curve_id) != 1) {
1416 al = SSL_AD_DECODE_ERROR;
1417 SSLerror(s, SSL_R_WRONG_CURVE);
1418 goto fatal_err;
1419 }
1420
1421 if ((nid = tls1_ec_curve_id2nid(curve_id)) == 0) {
1422 al = SSL_AD_INTERNAL_ERROR;
1423 SSLerror(s, SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1424 goto fatal_err;
1425 }
1426
1427 if (!CBS_get_u8_length_prefixed(cbs, &public))
1428 goto decode_err;
1429
1430 if (nid == NID_X25519) {
1431 if (ssl3_get_server_kex_ecdhe_ecx(s, sc, nid, &public) != 1)
1432 goto err;
1433 } else {
1434 if (ssl3_get_server_kex_ecdhe_ecp(s, sc, nid, &public) != 1)
1435 goto err;
1436 }
1437
1438 /*
1439 * The ECC/TLS specification does not mention the use of DSA to sign
1440 * ECParameters in the server key exchange message. We do support RSA
1441 * and ECDSA.
1442 */
1443 if (alg_a & SSL_aRSA)
1444 *pkey = X509_get_pubkey(sc->peer_pkeys[SSL_PKEY_RSA].x509);
1445 else if (alg_a & SSL_aECDSA)
1446 *pkey = X509_get_pubkey(sc->peer_pkeys[SSL_PKEY_ECC].x509);
1447 else
1448 /* XXX - Anonymous ECDH, so no certificate or pkey. */
1449 *pkey = NULL;
1450
1451 return (1);
1452
1453 decode_err:
1454 al = SSL_AD_DECODE_ERROR;
1455 SSLerror(s, SSL_R_BAD_PACKET_LENGTH);
1456
1457 fatal_err:
1458 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1459
1460 err:
1461 return (-1);
1462}
1463
1464int
1465ssl3_get_server_key_exchange(SSL *s)
1466{
1467 CBS cbs, signature;
1468 EVP_PKEY *pkey = NULL;
1469 EVP_MD_CTX md_ctx;
1470 const unsigned char *param;
1471 long n, alg_k, alg_a;
1472 int al, ok;
1473 size_t param_len;
1474
1475 EVP_MD_CTX_init(&md_ctx);
1476
1477 alg_k = S3I(s)->hs.cipher->algorithm_mkey;
1478 alg_a = S3I(s)->hs.cipher->algorithm_auth;
1479
1480 /*
1481 * Use same message size as in ssl3_get_certificate_request()
1482 * as ServerKeyExchange message may be skipped.
1483 */
1484 n = ssl3_get_message(s, SSL3_ST_CR_KEY_EXCH_A,
1485 SSL3_ST_CR_KEY_EXCH_B, -1, s->internal->max_cert_list, &ok);
1486 if (!ok)
1487 return ((int)n);
1488
1489 if (n < 0)
1490 goto err;
1491
1492 CBS_init(&cbs, s->internal->init_msg, n);
1493
1494 if (S3I(s)->hs.tls12.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) {
1495 /*
1496 * Do not skip server key exchange if this cipher suite uses
1497 * ephemeral keys.
1498 */
1499 if (alg_k & (SSL_kDHE|SSL_kECDHE)) {
1500 SSLerror(s, SSL_R_UNEXPECTED_MESSAGE);
1501 al = SSL_AD_UNEXPECTED_MESSAGE;
1502 goto fatal_err;
1503 }
1504
1505 S3I(s)->hs.tls12.reuse_message = 1;
1506 EVP_MD_CTX_cleanup(&md_ctx);
1507 return (1);
1508 }
1509
1510 if (SSI(s)->sess_cert != NULL) {
1511 DH_free(SSI(s)->sess_cert->peer_dh_tmp);
1512 SSI(s)->sess_cert->peer_dh_tmp = NULL;
1513
1514 EC_KEY_free(SSI(s)->sess_cert->peer_ecdh_tmp);
1515 SSI(s)->sess_cert->peer_ecdh_tmp = NULL;
1516
1517 free(SSI(s)->sess_cert->peer_x25519_tmp);
1518 SSI(s)->sess_cert->peer_x25519_tmp = NULL;
1519 } else {
1520 SSI(s)->sess_cert = ssl_sess_cert_new();
1521 if (SSI(s)->sess_cert == NULL)
1522 goto err;
1523 }
1524
1525 param = CBS_data(&cbs);
1526 param_len = CBS_len(&cbs);
1527
1528 if (alg_k & SSL_kDHE) {
1529 if (ssl3_get_server_kex_dhe(s, &pkey, &cbs) != 1)
1530 goto err;
1531 } else if (alg_k & SSL_kECDHE) {
1532 if (ssl3_get_server_kex_ecdhe(s, &pkey, &cbs) != 1)
1533 goto err;
1534 } else if (alg_k != 0) {
1535 al = SSL_AD_UNEXPECTED_MESSAGE;
1536 SSLerror(s, SSL_R_UNEXPECTED_MESSAGE);
1537 goto fatal_err;
1538 }
1539
1540 param_len -= CBS_len(&cbs);
1541
1542 /* if it was signed, check the signature */
1543 if (pkey != NULL) {
1544 uint16_t sigalg_value = SIGALG_NONE;
1545 const struct ssl_sigalg *sigalg;
1546 EVP_PKEY_CTX *pctx;
1547
1548 if (SSL_USE_SIGALGS(s)) {
1549 if (!CBS_get_u16(&cbs, &sigalg_value))
1550 goto decode_err;
1551 }
1552 if (!CBS_get_u16_length_prefixed(&cbs, &signature))
1553 goto decode_err;
1554 if (CBS_len(&signature) > EVP_PKEY_size(pkey)) {
1555 al = SSL_AD_DECODE_ERROR;
1556 SSLerror(s, SSL_R_WRONG_SIGNATURE_LENGTH);
1557 goto fatal_err;
1558 }
1559
1560 if ((sigalg = ssl_sigalg_for_peer(s, pkey,
1561 sigalg_value)) == NULL) {
1562 al = SSL_AD_DECODE_ERROR;
1563 goto fatal_err;
1564 }
1565 S3I(s)->hs.peer_sigalg = sigalg;
1566
1567 if (!EVP_DigestVerifyInit(&md_ctx, &pctx, sigalg->md(),
1568 NULL, pkey))
1569 goto err;
1570 if (!EVP_DigestVerifyUpdate(&md_ctx, s->s3->client_random,
1571 SSL3_RANDOM_SIZE))
1572 goto err;
1573 if ((sigalg->flags & SIGALG_FLAG_RSA_PSS) &&
1574 (!EVP_PKEY_CTX_set_rsa_padding(pctx,
1575 RSA_PKCS1_PSS_PADDING) ||
1576 !EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, -1)))
1577 goto err;
1578 if (!EVP_DigestVerifyUpdate(&md_ctx, s->s3->server_random,
1579 SSL3_RANDOM_SIZE))
1580 goto err;
1581 if (!EVP_DigestVerifyUpdate(&md_ctx, param, param_len))
1582 goto err;
1583 if (EVP_DigestVerifyFinal(&md_ctx, CBS_data(&signature),
1584 CBS_len(&signature)) <= 0) {
1585 al = SSL_AD_DECRYPT_ERROR;
1586 SSLerror(s, SSL_R_BAD_SIGNATURE);
1587 goto fatal_err;
1588 }
1589 } else {
1590 /* aNULL does not need public keys. */
1591 if (!(alg_a & SSL_aNULL)) {
1592 SSLerror(s, ERR_R_INTERNAL_ERROR);
1593 goto err;
1594 }
1595 }
1596
1597 if (CBS_len(&cbs) != 0) {
1598 al = SSL_AD_DECODE_ERROR;
1599 SSLerror(s, SSL_R_EXTRA_DATA_IN_MESSAGE);
1600 goto fatal_err;
1601 }
1602
1603 EVP_PKEY_free(pkey);
1604 EVP_MD_CTX_cleanup(&md_ctx);
1605
1606 return (1);
1607
1608 decode_err:
1609 al = SSL_AD_DECODE_ERROR;
1610 SSLerror(s, SSL_R_BAD_PACKET_LENGTH);
1611
1612 fatal_err:
1613 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1614
1615 err:
1616 EVP_PKEY_free(pkey);
1617 EVP_MD_CTX_cleanup(&md_ctx);
1618
1619 return (-1);
1620}
1621
1622int
1623ssl3_get_certificate_request(SSL *s)
1624{
1625 int ok, ret = 0;
1626 long n;
1627 CBS cert_request, cert_types, rdn_list;
1628 X509_NAME *xn = NULL;
1629 const unsigned char *q;
1630 STACK_OF(X509_NAME) *ca_sk = NULL;
1631
1632 n = ssl3_get_message(s, SSL3_ST_CR_CERT_REQ_A,
1633 SSL3_ST_CR_CERT_REQ_B, -1, s->internal->max_cert_list, &ok);
1634 if (!ok)
1635 return ((int)n);
1636
1637 S3I(s)->hs.tls12.cert_request = 0;
1638
1639 if (S3I(s)->hs.tls12.message_type == SSL3_MT_SERVER_DONE) {
1640 S3I(s)->hs.tls12.reuse_message = 1;
1641 /*
1642 * If we get here we don't need any cached handshake records
1643 * as we wont be doing client auth.
1644 */
1645 tls1_transcript_free(s);
1646 return (1);
1647 }
1648
1649 if (S3I(s)->hs.tls12.message_type != SSL3_MT_CERTIFICATE_REQUEST) {
1650 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
1651 SSLerror(s, SSL_R_WRONG_MESSAGE_TYPE);
1652 goto err;
1653 }
1654
1655 /* TLS does not like anon-DH with client cert */
1656 if (S3I(s)->hs.cipher->algorithm_auth & SSL_aNULL) {
1657 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
1658 SSLerror(s, SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1659 goto err;
1660 }
1661
1662 if (n < 0)
1663 goto decode_err;
1664 CBS_init(&cert_request, s->internal->init_msg, n);
1665
1666 if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) {
1667 SSLerror(s, ERR_R_MALLOC_FAILURE);
1668 goto err;
1669 }
1670
1671 if (!CBS_get_u8_length_prefixed(&cert_request, &cert_types))
1672 goto decode_err;
1673
1674 if (SSL_USE_SIGALGS(s)) {
1675 CBS sigalgs;
1676
1677 if (CBS_len(&cert_request) < 2) {
1678 SSLerror(s, SSL_R_DATA_LENGTH_TOO_LONG);
1679 goto err;
1680 }
1681 if (!CBS_get_u16_length_prefixed(&cert_request, &sigalgs)) {
1682 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1683 SSLerror(s, SSL_R_DATA_LENGTH_TOO_LONG);
1684 goto err;
1685 }
1686 if (CBS_len(&sigalgs) % 2 != 0 || CBS_len(&sigalgs) > 64) {
1687 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1688 SSLerror(s, SSL_R_SIGNATURE_ALGORITHMS_ERROR);
1689 goto err;
1690 }
1691 if (!CBS_stow(&sigalgs, &S3I(s)->hs.sigalgs,
1692 &S3I(s)->hs.sigalgs_len))
1693 goto err;
1694 }
1695
1696 /* get the CA RDNs */
1697 if (CBS_len(&cert_request) < 2) {
1698 SSLerror(s, SSL_R_DATA_LENGTH_TOO_LONG);
1699 goto err;
1700 }
1701
1702 if (!CBS_get_u16_length_prefixed(&cert_request, &rdn_list) ||
1703 CBS_len(&cert_request) != 0) {
1704 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1705 SSLerror(s, SSL_R_LENGTH_MISMATCH);
1706 goto err;
1707 }
1708
1709 while (CBS_len(&rdn_list) > 0) {
1710 CBS rdn;
1711
1712 if (CBS_len(&rdn_list) < 2) {
1713 SSLerror(s, SSL_R_DATA_LENGTH_TOO_LONG);
1714 goto err;
1715 }
1716
1717 if (!CBS_get_u16_length_prefixed(&rdn_list, &rdn)) {
1718 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1719 SSLerror(s, SSL_R_CA_DN_TOO_LONG);
1720 goto err;
1721 }
1722
1723 q = CBS_data(&rdn);
1724 if ((xn = d2i_X509_NAME(NULL, &q, CBS_len(&rdn))) == NULL) {
1725 ssl3_send_alert(s, SSL3_AL_FATAL,
1726 SSL_AD_DECODE_ERROR);
1727 SSLerror(s, ERR_R_ASN1_LIB);
1728 goto err;
1729 }
1730
1731 if (q != CBS_data(&rdn) + CBS_len(&rdn)) {
1732 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1733 SSLerror(s, SSL_R_CA_DN_LENGTH_MISMATCH);
1734 goto err;
1735 }
1736 if (!sk_X509_NAME_push(ca_sk, xn)) {
1737 SSLerror(s, ERR_R_MALLOC_FAILURE);
1738 goto err;
1739 }
1740 xn = NULL; /* avoid free in err block */
1741 }
1742
1743 /* we should setup a certificate to return.... */
1744 S3I(s)->hs.tls12.cert_request = 1;
1745 sk_X509_NAME_pop_free(S3I(s)->hs.tls12.ca_names, X509_NAME_free);
1746 S3I(s)->hs.tls12.ca_names = ca_sk;
1747 ca_sk = NULL;
1748
1749 ret = 1;
1750 if (0) {
1751 decode_err:
1752 SSLerror(s, SSL_R_BAD_PACKET_LENGTH);
1753 }
1754 err:
1755 X509_NAME_free(xn);
1756 sk_X509_NAME_pop_free(ca_sk, X509_NAME_free);
1757 return (ret);
1758}
1759
1760static int
1761ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1762{
1763 return (X509_NAME_cmp(*a, *b));
1764}
1765
1766int
1767ssl3_get_new_session_ticket(SSL *s)
1768{
1769 int ok, al, ret = 0;
1770 uint32_t lifetime_hint;
1771 long n;
1772 CBS cbs, session_ticket;
1773
1774 n = ssl3_get_message(s, SSL3_ST_CR_SESSION_TICKET_A,
1775 SSL3_ST_CR_SESSION_TICKET_B, -1, 16384, &ok);
1776 if (!ok)
1777 return ((int)n);
1778
1779 if (S3I(s)->hs.tls12.message_type == SSL3_MT_FINISHED) {
1780 S3I(s)->hs.tls12.reuse_message = 1;
1781 return (1);
1782 }
1783 if (S3I(s)->hs.tls12.message_type != SSL3_MT_NEWSESSION_TICKET) {
1784 al = SSL_AD_UNEXPECTED_MESSAGE;
1785 SSLerror(s, SSL_R_BAD_MESSAGE_TYPE);
1786 goto fatal_err;
1787 }
1788
1789 if (n < 0) {
1790 al = SSL_AD_DECODE_ERROR;
1791 SSLerror(s, SSL_R_LENGTH_MISMATCH);
1792 goto fatal_err;
1793 }
1794
1795 CBS_init(&cbs, s->internal->init_msg, n);
1796 if (!CBS_get_u32(&cbs, &lifetime_hint) ||
1797#if UINT32_MAX > LONG_MAX
1798 lifetime_hint > LONG_MAX ||
1799#endif
1800 !CBS_get_u16_length_prefixed(&cbs, &session_ticket) ||
1801 CBS_len(&cbs) != 0) {
1802 al = SSL_AD_DECODE_ERROR;
1803 SSLerror(s, SSL_R_LENGTH_MISMATCH);
1804 goto fatal_err;
1805 }
1806 s->session->tlsext_tick_lifetime_hint = (long)lifetime_hint;
1807
1808 if (!CBS_stow(&session_ticket, &s->session->tlsext_tick,
1809 &s->session->tlsext_ticklen)) {
1810 SSLerror(s, ERR_R_MALLOC_FAILURE);
1811 goto err;
1812 }
1813
1814 /*
1815 * There are two ways to detect a resumed ticket sesion.
1816 * One is to set an appropriate session ID and then the server
1817 * must return a match in ServerHello. This allows the normal
1818 * client session ID matching to work and we know much
1819 * earlier that the ticket has been accepted.
1820 *
1821 * The other way is to set zero length session ID when the
1822 * ticket is presented and rely on the handshake to determine
1823 * session resumption.
1824 *
1825 * We choose the former approach because this fits in with
1826 * assumptions elsewhere in OpenSSL. The session ID is set
1827 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
1828 * ticket.
1829 */
1830 EVP_Digest(CBS_data(&session_ticket), CBS_len(&session_ticket),
1831 s->session->session_id, &s->session->session_id_length,
1832 EVP_sha256(), NULL);
1833 ret = 1;
1834 return (ret);
1835 fatal_err:
1836 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1837 err:
1838 return (-1);
1839}
1840
1841int
1842ssl3_get_cert_status(SSL *s)
1843{
1844 CBS cert_status, response;
1845 int ok, al;
1846 long n;
1847 uint8_t status_type;
1848
1849 n = ssl3_get_message(s, SSL3_ST_CR_CERT_STATUS_A,
1850 SSL3_ST_CR_CERT_STATUS_B, SSL3_MT_CERTIFICATE_STATUS,
1851 16384, &ok);
1852 if (!ok)
1853 return ((int)n);
1854
1855 if (n < 0) {
1856 /* need at least status type + length */
1857 al = SSL_AD_DECODE_ERROR;
1858 SSLerror(s, SSL_R_LENGTH_MISMATCH);
1859 goto fatal_err;
1860 }
1861
1862 CBS_init(&cert_status, s->internal->init_msg, n);
1863 if (!CBS_get_u8(&cert_status, &status_type) ||
1864 CBS_len(&cert_status) < 3) {
1865 /* need at least status type + length */
1866 al = SSL_AD_DECODE_ERROR;
1867 SSLerror(s, SSL_R_LENGTH_MISMATCH);
1868 goto fatal_err;
1869 }
1870
1871 if (status_type != TLSEXT_STATUSTYPE_ocsp) {
1872 al = SSL_AD_DECODE_ERROR;
1873 SSLerror(s, SSL_R_UNSUPPORTED_STATUS_TYPE);
1874 goto fatal_err;
1875 }
1876
1877 if (!CBS_get_u24_length_prefixed(&cert_status, &response) ||
1878 CBS_len(&cert_status) != 0) {
1879 al = SSL_AD_DECODE_ERROR;
1880 SSLerror(s, SSL_R_LENGTH_MISMATCH);
1881 goto fatal_err;
1882 }
1883
1884 if (!CBS_stow(&response, &s->internal->tlsext_ocsp_resp,
1885 &s->internal->tlsext_ocsp_resp_len)) {
1886 al = SSL_AD_INTERNAL_ERROR;
1887 SSLerror(s, ERR_R_MALLOC_FAILURE);
1888 goto fatal_err;
1889 }
1890
1891 if (s->ctx->internal->tlsext_status_cb) {
1892 int ret;
1893 ret = s->ctx->internal->tlsext_status_cb(s,
1894 s->ctx->internal->tlsext_status_arg);
1895 if (ret == 0) {
1896 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
1897 SSLerror(s, SSL_R_INVALID_STATUS_RESPONSE);
1898 goto fatal_err;
1899 }
1900 if (ret < 0) {
1901 al = SSL_AD_INTERNAL_ERROR;
1902 SSLerror(s, ERR_R_MALLOC_FAILURE);
1903 goto fatal_err;
1904 }
1905 }
1906 return (1);
1907 fatal_err:
1908 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1909 return (-1);
1910}
1911
1912int
1913ssl3_get_server_done(SSL *s)
1914{
1915 int ok, ret = 0;
1916 long n;
1917
1918 n = ssl3_get_message(s, SSL3_ST_CR_SRVR_DONE_A,
1919 SSL3_ST_CR_SRVR_DONE_B, SSL3_MT_SERVER_DONE,
1920 30, /* should be very small, like 0 :-) */ &ok);
1921 if (!ok)
1922 return ((int)n);
1923
1924 if (n > 0) {
1925 /* should contain no data */
1926 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1927 SSLerror(s, SSL_R_LENGTH_MISMATCH);
1928 return (-1);
1929 }
1930 ret = 1;
1931 return (ret);
1932}
1933
1934static int
1935ssl3_send_client_kex_rsa(SSL *s, SESS_CERT *sess_cert, CBB *cbb)
1936{
1937 unsigned char pms[SSL_MAX_MASTER_KEY_LENGTH];
1938 unsigned char *enc_pms = NULL;
1939 EVP_PKEY *pkey = NULL;
1940 int ret = -1;
1941 int enc_len;
1942 CBB epms;
1943
1944 /*
1945 * RSA-Encrypted Premaster Secret Message - RFC 5246 section 7.4.7.1.
1946 */
1947
1948 pkey = X509_get_pubkey(sess_cert->peer_pkeys[SSL_PKEY_RSA].x509);
1949 if (pkey == NULL || pkey->type != EVP_PKEY_RSA ||
1950 pkey->pkey.rsa == NULL) {
1951 SSLerror(s, ERR_R_INTERNAL_ERROR);
1952 goto err;
1953 }
1954
1955 /* XXX - our max protocol version. */
1956 pms[0] = s->client_version >> 8;
1957 pms[1] = s->client_version & 0xff;
1958 arc4random_buf(&pms[2], sizeof(pms) - 2);
1959
1960 if ((enc_pms = malloc(RSA_size(pkey->pkey.rsa))) == NULL) {
1961 SSLerror(s, ERR_R_MALLOC_FAILURE);
1962 goto err;
1963 }
1964
1965 enc_len = RSA_public_encrypt(sizeof(pms), pms, enc_pms, pkey->pkey.rsa,
1966 RSA_PKCS1_PADDING);
1967 if (enc_len <= 0) {
1968 SSLerror(s, SSL_R_BAD_RSA_ENCRYPT);
1969 goto err;
1970 }
1971
1972 if (!CBB_add_u16_length_prefixed(cbb, &epms))
1973 goto err;
1974 if (!CBB_add_bytes(&epms, enc_pms, enc_len))
1975 goto err;
1976 if (!CBB_flush(cbb))
1977 goto err;
1978
1979 if (!tls12_derive_master_secret(s, pms, sizeof(pms)))
1980 goto err;
1981
1982 ret = 1;
1983
1984 err:
1985 explicit_bzero(pms, sizeof(pms));
1986 EVP_PKEY_free(pkey);
1987 free(enc_pms);
1988
1989 return (ret);
1990}
1991
1992static int
1993ssl3_send_client_kex_dhe(SSL *s, SESS_CERT *sess_cert, CBB *cbb)
1994{
1995 DH *dh_srvr = NULL, *dh_clnt = NULL;
1996 unsigned char *key = NULL;
1997 int key_size = 0, key_len;
1998 unsigned char *data;
1999 int ret = -1;
2000 CBB dh_Yc;
2001
2002 /* Ensure that we have an ephemeral key for DHE. */
2003 if (sess_cert->peer_dh_tmp == NULL) {
2004 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2005 SSLerror(s, SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
2006 goto err;
2007 }
2008 dh_srvr = sess_cert->peer_dh_tmp;
2009
2010 /* Generate a new random key. */
2011 if ((dh_clnt = DHparams_dup(dh_srvr)) == NULL) {
2012 SSLerror(s, ERR_R_DH_LIB);
2013 goto err;
2014 }
2015 if (!DH_generate_key(dh_clnt)) {
2016 SSLerror(s, ERR_R_DH_LIB);
2017 goto err;
2018 }
2019 if ((key_size = DH_size(dh_clnt)) <= 0) {
2020 SSLerror(s, ERR_R_DH_LIB);
2021 goto err;
2022 }
2023 if ((key = malloc(key_size)) == NULL) {
2024 SSLerror(s, ERR_R_MALLOC_FAILURE);
2025 goto err;
2026 }
2027 if ((key_len = DH_compute_key(key, dh_srvr->pub_key, dh_clnt)) <= 0) {
2028 SSLerror(s, ERR_R_DH_LIB);
2029 goto err;
2030 }
2031
2032 if (!tls12_derive_master_secret(s, key, key_len))
2033 goto err;
2034
2035 if (!CBB_add_u16_length_prefixed(cbb, &dh_Yc))
2036 goto err;
2037 if (!CBB_add_space(&dh_Yc, &data, BN_num_bytes(dh_clnt->pub_key)))
2038 goto err;
2039 BN_bn2bin(dh_clnt->pub_key, data);
2040 if (!CBB_flush(cbb))
2041 goto err;
2042
2043 ret = 1;
2044
2045 err:
2046 DH_free(dh_clnt);
2047 freezero(key, key_size);
2048
2049 return (ret);
2050}
2051
2052static int
2053ssl3_send_client_kex_ecdhe_ecp(SSL *s, SESS_CERT *sc, CBB *cbb)
2054{
2055 EC_KEY *ecdh = NULL;
2056 uint8_t *key = NULL;
2057 size_t key_len = 0;
2058 int ret = -1;
2059 CBB ecpoint;
2060
2061 if ((ecdh = EC_KEY_new()) == NULL) {
2062 SSLerror(s, ERR_R_MALLOC_FAILURE);
2063 goto err;
2064 }
2065
2066 if (!ssl_kex_generate_ecdhe_ecp(ecdh, sc->peer_nid))
2067 goto err;
2068
2069 /* Encode our public key. */
2070 if (!CBB_add_u8_length_prefixed(cbb, &ecpoint))
2071 goto err;
2072 if (!ssl_kex_public_ecdhe_ecp(ecdh, &ecpoint))
2073 goto err;
2074 if (!CBB_flush(cbb))
2075 goto err;
2076
2077 if (!ssl_kex_derive_ecdhe_ecp(ecdh, sc->peer_ecdh_tmp, &key, &key_len))
2078 goto err;
2079 if (!tls12_derive_master_secret(s, key, key_len))
2080 goto err;
2081
2082 ret = 1;
2083
2084 err:
2085 freezero(key, key_len);
2086 EC_KEY_free(ecdh);
2087
2088 return (ret);
2089}
2090
2091static int
2092ssl3_send_client_kex_ecdhe_ecx(SSL *s, SESS_CERT *sc, CBB *cbb)
2093{
2094 uint8_t *public_key = NULL, *private_key = NULL, *shared_key = NULL;
2095 int ret = -1;
2096 CBB ecpoint;
2097
2098 /* Generate X25519 key pair and derive shared key. */
2099 if ((public_key = malloc(X25519_KEY_LENGTH)) == NULL)
2100 goto err;
2101 if ((private_key = malloc(X25519_KEY_LENGTH)) == NULL)
2102 goto err;
2103 if ((shared_key = malloc(X25519_KEY_LENGTH)) == NULL)
2104 goto err;
2105 X25519_keypair(public_key, private_key);
2106 if (!X25519(shared_key, private_key, sc->peer_x25519_tmp))
2107 goto err;
2108
2109 /* Serialize the public key. */
2110 if (!CBB_add_u8_length_prefixed(cbb, &ecpoint))
2111 goto err;
2112 if (!CBB_add_bytes(&ecpoint, public_key, X25519_KEY_LENGTH))
2113 goto err;
2114 if (!CBB_flush(cbb))
2115 goto err;
2116
2117 if (!tls12_derive_master_secret(s, shared_key, X25519_KEY_LENGTH))
2118 goto err;
2119
2120 ret = 1;
2121
2122 err:
2123 free(public_key);
2124 freezero(private_key, X25519_KEY_LENGTH);
2125 freezero(shared_key, X25519_KEY_LENGTH);
2126
2127 return (ret);
2128}
2129
2130static int
2131ssl3_send_client_kex_ecdhe(SSL *s, SESS_CERT *sc, CBB *cbb)
2132{
2133 if (sc->peer_x25519_tmp != NULL) {
2134 if (ssl3_send_client_kex_ecdhe_ecx(s, sc, cbb) != 1)
2135 goto err;
2136 } else if (sc->peer_ecdh_tmp != NULL) {
2137 if (ssl3_send_client_kex_ecdhe_ecp(s, sc, cbb) != 1)
2138 goto err;
2139 } else {
2140 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2141 SSLerror(s, ERR_R_INTERNAL_ERROR);
2142 goto err;
2143 }
2144
2145 return (1);
2146
2147 err:
2148 return (-1);
2149}
2150
2151static int
2152ssl3_send_client_kex_gost(SSL *s, SESS_CERT *sess_cert, CBB *cbb)
2153{
2154 unsigned char premaster_secret[32], shared_ukm[32], tmp[256];
2155 EVP_PKEY *pub_key = NULL;
2156 EVP_PKEY_CTX *pkey_ctx;
2157 X509 *peer_cert;
2158 size_t msglen;
2159 unsigned int md_len;
2160 EVP_MD_CTX *ukm_hash;
2161 int ret = -1;
2162 int nid;
2163 CBB gostblob;
2164
2165 /* Get server sertificate PKEY and create ctx from it */
2166 peer_cert = sess_cert->peer_pkeys[SSL_PKEY_GOST01].x509;
2167 if (peer_cert == NULL) {
2168 SSLerror(s, SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2169 goto err;
2170 }
2171
2172 pub_key = X509_get_pubkey(peer_cert);
2173 pkey_ctx = EVP_PKEY_CTX_new(pub_key, NULL);
2174
2175 /*
2176 * If we have send a certificate, and certificate key parameters match
2177 * those of server certificate, use certificate key for key exchange.
2178 * Otherwise, generate ephemeral key pair.
2179 */
2180 EVP_PKEY_encrypt_init(pkey_ctx);
2181
2182 /* Generate session key. */
2183 arc4random_buf(premaster_secret, 32);
2184
2185 /*
2186 * If we have client certificate, use its secret as peer key.
2187 */
2188 if (S3I(s)->hs.tls12.cert_request && s->cert->key->privatekey) {
2189 if (EVP_PKEY_derive_set_peer(pkey_ctx,
2190 s->cert->key->privatekey) <=0) {
2191 /*
2192 * If there was an error - just ignore it.
2193 * Ephemeral key would be used.
2194 */
2195 ERR_clear_error();
2196 }
2197 }
2198
2199 /*
2200 * Compute shared IV and store it in algorithm-specific context data.
2201 */
2202 ukm_hash = EVP_MD_CTX_new();
2203 if (ukm_hash == NULL) {
2204 SSLerror(s, ERR_R_MALLOC_FAILURE);
2205 goto err;
2206 }
2207
2208 /* XXX check handshake hash instead. */
2209 if (S3I(s)->hs.cipher->algorithm2 & SSL_HANDSHAKE_MAC_GOST94)
2210 nid = NID_id_GostR3411_94;
2211 else
2212 nid = NID_id_tc26_gost3411_2012_256;
2213 if (!EVP_DigestInit(ukm_hash, EVP_get_digestbynid(nid)))
2214 goto err;
2215 EVP_DigestUpdate(ukm_hash, s->s3->client_random, SSL3_RANDOM_SIZE);
2216 EVP_DigestUpdate(ukm_hash, s->s3->server_random, SSL3_RANDOM_SIZE);
2217 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2218 EVP_MD_CTX_free(ukm_hash);
2219 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT,
2220 EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) {
2221 SSLerror(s, SSL_R_LIBRARY_BUG);
2222 goto err;
2223 }
2224
2225 /*
2226 * Make GOST keytransport blob message, encapsulate it into sequence.
2227 */
2228 msglen = 255;
2229 if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, premaster_secret,
2230 32) < 0) {
2231 SSLerror(s, SSL_R_LIBRARY_BUG);
2232 goto err;
2233 }
2234
2235 if (!CBB_add_asn1(cbb, &gostblob, CBS_ASN1_SEQUENCE))
2236 goto err;
2237 if (!CBB_add_bytes(&gostblob, tmp, msglen))
2238 goto err;
2239 if (!CBB_flush(cbb))
2240 goto err;
2241
2242 /* Check if pubkey from client certificate was used. */
2243 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2,
2244 NULL) > 0) {
2245 /* Set flag "skip certificate verify". */
2246 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2247 }
2248 EVP_PKEY_CTX_free(pkey_ctx);
2249
2250 if (!tls12_derive_master_secret(s, premaster_secret, 32))
2251 goto err;
2252
2253 ret = 1;
2254
2255 err:
2256 explicit_bzero(premaster_secret, sizeof(premaster_secret));
2257 EVP_PKEY_free(pub_key);
2258
2259 return (ret);
2260}
2261
2262int
2263ssl3_send_client_key_exchange(SSL *s)
2264{
2265 SESS_CERT *sess_cert;
2266 unsigned long alg_k;
2267 CBB cbb, kex;
2268
2269 memset(&cbb, 0, sizeof(cbb));
2270
2271 if (S3I(s)->hs.state == SSL3_ST_CW_KEY_EXCH_A) {
2272 alg_k = S3I(s)->hs.cipher->algorithm_mkey;
2273
2274 if ((sess_cert = SSI(s)->sess_cert) == NULL) {
2275 ssl3_send_alert(s, SSL3_AL_FATAL,
2276 SSL_AD_UNEXPECTED_MESSAGE);
2277 SSLerror(s, ERR_R_INTERNAL_ERROR);
2278 goto err;
2279 }
2280
2281 if (!ssl3_handshake_msg_start(s, &cbb, &kex,
2282 SSL3_MT_CLIENT_KEY_EXCHANGE))
2283 goto err;
2284
2285 if (alg_k & SSL_kRSA) {
2286 if (ssl3_send_client_kex_rsa(s, sess_cert, &kex) != 1)
2287 goto err;
2288 } else if (alg_k & SSL_kDHE) {
2289 if (ssl3_send_client_kex_dhe(s, sess_cert, &kex) != 1)
2290 goto err;
2291 } else if (alg_k & SSL_kECDHE) {
2292 if (ssl3_send_client_kex_ecdhe(s, sess_cert, &kex) != 1)
2293 goto err;
2294 } else if (alg_k & SSL_kGOST) {
2295 if (ssl3_send_client_kex_gost(s, sess_cert, &kex) != 1)
2296 goto err;
2297 } else {
2298 ssl3_send_alert(s, SSL3_AL_FATAL,
2299 SSL_AD_HANDSHAKE_FAILURE);
2300 SSLerror(s, ERR_R_INTERNAL_ERROR);
2301 goto err;
2302 }
2303
2304 if (!ssl3_handshake_msg_finish(s, &cbb))
2305 goto err;
2306
2307 S3I(s)->hs.state = SSL3_ST_CW_KEY_EXCH_B;
2308 }
2309
2310 /* SSL3_ST_CW_KEY_EXCH_B */
2311 return (ssl3_handshake_write(s));
2312
2313 err:
2314 CBB_cleanup(&cbb);
2315
2316 return (-1);
2317}
2318
2319static int
2320ssl3_send_client_verify_sigalgs(SSL *s, EVP_PKEY *pkey,
2321 const struct ssl_sigalg *sigalg, CBB *cert_verify)
2322{
2323 CBB cbb_signature;
2324 EVP_PKEY_CTX *pctx = NULL;
2325 EVP_MD_CTX mctx;
2326 const unsigned char *hdata;
2327 unsigned char *signature = NULL;
2328 size_t signature_len, hdata_len;
2329 int ret = 0;
2330
2331 EVP_MD_CTX_init(&mctx);
2332
2333 if (!tls1_transcript_data(s, &hdata, &hdata_len)) {
2334 SSLerror(s, ERR_R_INTERNAL_ERROR);
2335 goto err;
2336 }
2337 if (!EVP_DigestSignInit(&mctx, &pctx, sigalg->md(), NULL, pkey)) {
2338 SSLerror(s, ERR_R_EVP_LIB);
2339 goto err;
2340 }
2341 if (sigalg->key_type == EVP_PKEY_GOSTR01 &&
2342 EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
2343 EVP_PKEY_CTRL_GOST_SIG_FORMAT, GOST_SIG_FORMAT_RS_LE, NULL) <= 0) {
2344 SSLerror(s, ERR_R_EVP_LIB);
2345 goto err;
2346 }
2347 if ((sigalg->flags & SIGALG_FLAG_RSA_PSS) &&
2348 (!EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) ||
2349 !EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, -1))) {
2350 SSLerror(s, ERR_R_EVP_LIB);
2351 goto err;
2352 }
2353 if (!EVP_DigestSignUpdate(&mctx, hdata, hdata_len)) {
2354 SSLerror(s, ERR_R_EVP_LIB);
2355 goto err;
2356 }
2357 if (!EVP_DigestSignFinal(&mctx, NULL, &signature_len) ||
2358 signature_len == 0) {
2359 SSLerror(s, ERR_R_EVP_LIB);
2360 goto err;
2361 }
2362 if ((signature = calloc(1, signature_len)) == NULL) {
2363 SSLerror(s, ERR_R_MALLOC_FAILURE);
2364 goto err;
2365 }
2366 if (!EVP_DigestSignFinal(&mctx, signature, &signature_len)) {
2367 SSLerror(s, ERR_R_EVP_LIB);
2368 goto err;
2369 }
2370
2371 if (!CBB_add_u16(cert_verify, sigalg->value))
2372 goto err;
2373 if (!CBB_add_u16_length_prefixed(cert_verify, &cbb_signature))
2374 goto err;
2375 if (!CBB_add_bytes(&cbb_signature, signature, signature_len))
2376 goto err;
2377 if (!CBB_flush(cert_verify))
2378 goto err;
2379
2380 ret = 1;
2381
2382 err:
2383 EVP_MD_CTX_cleanup(&mctx);
2384 free(signature);
2385 return ret;
2386}
2387
2388static int
2389ssl3_send_client_verify_rsa(SSL *s, EVP_PKEY *pkey, CBB *cert_verify)
2390{
2391 CBB cbb_signature;
2392 unsigned char data[EVP_MAX_MD_SIZE];
2393 unsigned char *signature = NULL;
2394 unsigned int signature_len;
2395 size_t data_len;
2396 int ret = 0;
2397
2398 if (!tls1_transcript_hash_value(s, data, sizeof(data), &data_len))
2399 goto err;
2400 if ((signature = calloc(1, EVP_PKEY_size(pkey))) == NULL)
2401 goto err;
2402 if (RSA_sign(NID_md5_sha1, data, data_len, signature,
2403 &signature_len, pkey->pkey.rsa) <= 0 ) {
2404 SSLerror(s, ERR_R_RSA_LIB);
2405 goto err;
2406 }
2407
2408 if (!CBB_add_u16_length_prefixed(cert_verify, &cbb_signature))
2409 goto err;
2410 if (!CBB_add_bytes(&cbb_signature, signature, signature_len))
2411 goto err;
2412 if (!CBB_flush(cert_verify))
2413 goto err;
2414
2415 ret = 1;
2416 err:
2417 free(signature);
2418 return ret;
2419}
2420
2421static int
2422ssl3_send_client_verify_ec(SSL *s, EVP_PKEY *pkey, CBB *cert_verify)
2423{
2424 CBB cbb_signature;
2425 unsigned char data[EVP_MAX_MD_SIZE];
2426 unsigned char *signature = NULL;
2427 unsigned int signature_len;
2428 int ret = 0;
2429
2430 if (!tls1_transcript_hash_value(s, data, sizeof(data), NULL))
2431 goto err;
2432 if ((signature = calloc(1, EVP_PKEY_size(pkey))) == NULL)
2433 goto err;
2434 if (!ECDSA_sign(pkey->save_type, &data[MD5_DIGEST_LENGTH],
2435 SHA_DIGEST_LENGTH, signature, &signature_len, pkey->pkey.ec)) {
2436 SSLerror(s, ERR_R_ECDSA_LIB);
2437 goto err;
2438 }
2439
2440 if (!CBB_add_u16_length_prefixed(cert_verify, &cbb_signature))
2441 goto err;
2442 if (!CBB_add_bytes(&cbb_signature, signature, signature_len))
2443 goto err;
2444 if (!CBB_flush(cert_verify))
2445 goto err;
2446
2447 ret = 1;
2448 err:
2449 free(signature);
2450 return ret;
2451}
2452
2453#ifndef OPENSSL_NO_GOST
2454static int
2455ssl3_send_client_verify_gost(SSL *s, EVP_PKEY *pkey, CBB *cert_verify)
2456{
2457 CBB cbb_signature;
2458 EVP_MD_CTX mctx;
2459 EVP_PKEY_CTX *pctx;
2460 const EVP_MD *md;
2461 const unsigned char *hdata;
2462 unsigned char *signature = NULL;
2463 size_t signature_len;
2464 size_t hdata_len;
2465 int nid;
2466 int ret = 0;
2467
2468 EVP_MD_CTX_init(&mctx);
2469
2470 if (!tls1_transcript_data(s, &hdata, &hdata_len)) {
2471 SSLerror(s, ERR_R_INTERNAL_ERROR);
2472 goto err;
2473 }
2474 if (!EVP_PKEY_get_default_digest_nid(pkey, &nid) ||
2475 (md = EVP_get_digestbynid(nid)) == NULL) {
2476 SSLerror(s, ERR_R_EVP_LIB);
2477 goto err;
2478 }
2479 if (!EVP_DigestSignInit(&mctx, &pctx, md, NULL, pkey)) {
2480 SSLerror(s, ERR_R_EVP_LIB);
2481 goto err;
2482 }
2483 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
2484 EVP_PKEY_CTRL_GOST_SIG_FORMAT, GOST_SIG_FORMAT_RS_LE, NULL) <= 0) {
2485 SSLerror(s, ERR_R_EVP_LIB);
2486 goto err;
2487 }
2488 if (!EVP_DigestSignUpdate(&mctx, hdata, hdata_len)) {
2489 SSLerror(s, ERR_R_EVP_LIB);
2490 goto err;
2491 }
2492 if (!EVP_DigestSignFinal(&mctx, NULL, &signature_len) ||
2493 signature_len == 0) {
2494 SSLerror(s, ERR_R_EVP_LIB);
2495 goto err;
2496 }
2497 if ((signature = calloc(1, signature_len)) == NULL) {
2498 SSLerror(s, ERR_R_MALLOC_FAILURE);
2499 goto err;
2500 }
2501 if (!EVP_DigestSignFinal(&mctx, signature, &signature_len)) {
2502 SSLerror(s, ERR_R_EVP_LIB);
2503 goto err;
2504 }
2505
2506 if (!CBB_add_u16_length_prefixed(cert_verify, &cbb_signature))
2507 goto err;
2508 if (!CBB_add_bytes(&cbb_signature, signature, signature_len))
2509 goto err;
2510 if (!CBB_flush(cert_verify))
2511 goto err;
2512
2513 ret = 1;
2514 err:
2515 EVP_MD_CTX_cleanup(&mctx);
2516 free(signature);
2517 return ret;
2518}
2519#endif
2520
2521int
2522ssl3_send_client_verify(SSL *s)
2523{
2524 const struct ssl_sigalg *sigalg;
2525 CBB cbb, cert_verify;
2526 EVP_PKEY *pkey;
2527
2528 memset(&cbb, 0, sizeof(cbb));
2529
2530 if (S3I(s)->hs.state == SSL3_ST_CW_CERT_VRFY_A) {
2531 if (!ssl3_handshake_msg_start(s, &cbb, &cert_verify,
2532 SSL3_MT_CERTIFICATE_VERIFY))
2533 goto err;
2534
2535 pkey = s->cert->key->privatekey;
2536 if ((sigalg = ssl_sigalg_select(s, pkey)) == NULL) {
2537 SSLerror(s, SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2538 goto err;
2539 }
2540 S3I(s)->hs.our_sigalg = sigalg;
2541
2542 /*
2543 * For TLS v1.2 send signature algorithm and signature using
2544 * agreed digest and cached handshake records.
2545 */
2546 if (SSL_USE_SIGALGS(s)) {
2547 if (!ssl3_send_client_verify_sigalgs(s, pkey, sigalg,
2548 &cert_verify))
2549 goto err;
2550 } else if (pkey->type == EVP_PKEY_RSA) {
2551 if (!ssl3_send_client_verify_rsa(s, pkey, &cert_verify))
2552 goto err;
2553 } else if (pkey->type == EVP_PKEY_EC) {
2554 if (!ssl3_send_client_verify_ec(s, pkey, &cert_verify))
2555 goto err;
2556#ifndef OPENSSL_NO_GOST
2557 } else if (pkey->type == NID_id_GostR3410_94 ||
2558 pkey->type == NID_id_GostR3410_2001) {
2559 if (!ssl3_send_client_verify_gost(s, pkey, &cert_verify))
2560 goto err;
2561#endif
2562 } else {
2563 SSLerror(s, ERR_R_INTERNAL_ERROR);
2564 goto err;
2565 }
2566
2567 tls1_transcript_free(s);
2568
2569 if (!ssl3_handshake_msg_finish(s, &cbb))
2570 goto err;
2571
2572 S3I(s)->hs.state = SSL3_ST_CW_CERT_VRFY_B;
2573 }
2574
2575 return (ssl3_handshake_write(s));
2576
2577 err:
2578 CBB_cleanup(&cbb);
2579
2580 return (-1);
2581}
2582
2583int
2584ssl3_send_client_certificate(SSL *s)
2585{
2586 EVP_PKEY *pkey = NULL;
2587 X509 *x509 = NULL;
2588 CBB cbb, client_cert;
2589 int i;
2590
2591 memset(&cbb, 0, sizeof(cbb));
2592
2593 if (S3I(s)->hs.state == SSL3_ST_CW_CERT_A) {
2594 if (s->cert->key->x509 == NULL ||
2595 s->cert->key->privatekey == NULL)
2596 S3I(s)->hs.state = SSL3_ST_CW_CERT_B;
2597 else
2598 S3I(s)->hs.state = SSL3_ST_CW_CERT_C;
2599 }
2600
2601 /* We need to get a client cert */
2602 if (S3I(s)->hs.state == SSL3_ST_CW_CERT_B) {
2603 /*
2604 * If we get an error, we need to
2605 * ssl->internal->rwstate = SSL_X509_LOOKUP; return(-1);
2606 * We then get retried later.
2607 */
2608 i = ssl_do_client_cert_cb(s, &x509, &pkey);
2609 if (i < 0) {
2610 s->internal->rwstate = SSL_X509_LOOKUP;
2611 return (-1);
2612 }
2613 s->internal->rwstate = SSL_NOTHING;
2614 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) {
2615 S3I(s)->hs.state = SSL3_ST_CW_CERT_B;
2616 if (!SSL_use_certificate(s, x509) ||
2617 !SSL_use_PrivateKey(s, pkey))
2618 i = 0;
2619 } else if (i == 1) {
2620 i = 0;
2621 SSLerror(s, SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
2622 }
2623
2624 X509_free(x509);
2625 EVP_PKEY_free(pkey);
2626 if (i == 0) {
2627 S3I(s)->hs.tls12.cert_request = 2;
2628
2629 /* There is no client certificate to verify. */
2630 tls1_transcript_free(s);
2631 }
2632
2633 /* Ok, we have a cert */
2634 S3I(s)->hs.state = SSL3_ST_CW_CERT_C;
2635 }
2636
2637 if (S3I(s)->hs.state == SSL3_ST_CW_CERT_C) {
2638 if (!ssl3_handshake_msg_start(s, &cbb, &client_cert,
2639 SSL3_MT_CERTIFICATE))
2640 goto err;
2641 if (!ssl3_output_cert_chain(s, &client_cert,
2642 (S3I(s)->hs.tls12.cert_request == 2) ? NULL : s->cert->key))
2643 goto err;
2644 if (!ssl3_handshake_msg_finish(s, &cbb))
2645 goto err;
2646
2647 S3I(s)->hs.state = SSL3_ST_CW_CERT_D;
2648 }
2649
2650 /* SSL3_ST_CW_CERT_D */
2651 return (ssl3_handshake_write(s));
2652
2653 err:
2654 CBB_cleanup(&cbb);
2655
2656 return (0);
2657}
2658
2659#define has_bits(i,m) (((i)&(m)) == (m))
2660
2661int
2662ssl3_check_cert_and_algorithm(SSL *s)
2663{
2664 int i, idx;
2665 long alg_k, alg_a;
2666 EVP_PKEY *pkey = NULL;
2667 SESS_CERT *sc;
2668 DH *dh;
2669
2670 alg_k = S3I(s)->hs.cipher->algorithm_mkey;
2671 alg_a = S3I(s)->hs.cipher->algorithm_auth;
2672
2673 /* We don't have a certificate. */
2674 if (alg_a & SSL_aNULL)
2675 return (1);
2676
2677 sc = SSI(s)->sess_cert;
2678 if (sc == NULL) {
2679 SSLerror(s, ERR_R_INTERNAL_ERROR);
2680 goto err;
2681 }
2682 dh = SSI(s)->sess_cert->peer_dh_tmp;
2683
2684 /* This is the passed certificate. */
2685
2686 idx = sc->peer_cert_type;
2687 if (idx == SSL_PKEY_ECC) {
2688 if (ssl_check_srvr_ecc_cert_and_alg(
2689 sc->peer_pkeys[idx].x509, s) == 0) {
2690 /* check failed */
2691 SSLerror(s, SSL_R_BAD_ECC_CERT);
2692 goto fatal_err;
2693 } else {
2694 return (1);
2695 }
2696 }
2697 pkey = X509_get_pubkey(sc->peer_pkeys[idx].x509);
2698 i = X509_certificate_type(sc->peer_pkeys[idx].x509, pkey);
2699 EVP_PKEY_free(pkey);
2700
2701 /* Check that we have a certificate if we require one. */
2702 if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA|EVP_PKT_SIGN)) {
2703 SSLerror(s, SSL_R_MISSING_RSA_SIGNING_CERT);
2704 goto fatal_err;
2705 }
2706 if ((alg_k & SSL_kRSA) && !has_bits(i, EVP_PK_RSA|EVP_PKT_ENC)) {
2707 SSLerror(s, SSL_R_MISSING_RSA_ENCRYPTING_CERT);
2708 goto fatal_err;
2709 }
2710 if ((alg_k & SSL_kDHE) &&
2711 !(has_bits(i, EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL))) {
2712 SSLerror(s, SSL_R_MISSING_DH_KEY);
2713 goto fatal_err;
2714 }
2715
2716 return (1);
2717 fatal_err:
2718 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2719 err:
2720 return (0);
2721}
2722
2723/*
2724 * Check to see if handshake is full or resumed. Usually this is just a
2725 * case of checking to see if a cache hit has occurred. In the case of
2726 * session tickets we have to check the next message to be sure.
2727 */
2728
2729int
2730ssl3_check_finished(SSL *s)
2731{
2732 int ok;
2733 long n;
2734
2735 /* If we have no ticket it cannot be a resumed session. */
2736 if (!s->session->tlsext_tick)
2737 return (1);
2738 /* this function is called when we really expect a Certificate
2739 * message, so permit appropriate message length */
2740 n = ssl3_get_message(s, SSL3_ST_CR_CERT_A,
2741 SSL3_ST_CR_CERT_B, -1, s->internal->max_cert_list, &ok);
2742 if (!ok)
2743 return ((int)n);
2744
2745 S3I(s)->hs.tls12.reuse_message = 1;
2746 if ((S3I(s)->hs.tls12.message_type == SSL3_MT_FINISHED) ||
2747 (S3I(s)->hs.tls12.message_type == SSL3_MT_NEWSESSION_TICKET))
2748 return (2);
2749
2750 return (1);
2751}
2752
2753int
2754ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
2755{
2756 int i = 0;
2757
2758#ifndef OPENSSL_NO_ENGINE
2759 if (s->ctx->internal->client_cert_engine) {
2760 i = ENGINE_load_ssl_client_cert(
2761 s->ctx->internal->client_cert_engine, s,
2762 SSL_get_client_CA_list(s), px509, ppkey, NULL, NULL, NULL);
2763 if (i != 0)
2764 return (i);
2765 }
2766#endif
2767 if (s->ctx->internal->client_cert_cb)
2768 i = s->ctx->internal->client_cert_cb(s, px509, ppkey);
2769 return (i);
2770}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2026-02-12 19:04:59 +0000