summaryrefslogtreecommitdiff
path: root/src/lib/libssl/ssl_clnt.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/lib/libssl/ssl_clnt.c')
-rw-r--r--src/lib/libssl/ssl_clnt.c2533
1 files changed, 0 insertions, 2533 deletions
diff --git a/src/lib/libssl/ssl_clnt.c b/src/lib/libssl/ssl_clnt.c
deleted file mode 100644
index 607b038825..0000000000
--- a/src/lib/libssl/ssl_clnt.c
+++ /dev/null
@@ -1,2533 +0,0 @@
1/* $OpenBSD: ssl_clnt.c,v 1.141 2022/02/05 14:54:10 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 int new_state, state, skip = 0;
183 int ret = -1;
184
185 ERR_clear_error();
186 errno = 0;
187
188 s->internal->in_handshake++;
189 if (!SSL_in_init(s) || SSL_in_before(s))
190 SSL_clear(s);
191
192 for (;;) {
193 state = s->s3->hs.state;
194
195 switch (s->s3->hs.state) {
196 case SSL_ST_RENEGOTIATE:
197 s->internal->renegotiate = 1;
198 s->s3->hs.state = SSL_ST_CONNECT;
199 s->ctx->internal->stats.sess_connect_renegotiate++;
200 /* break */
201 case SSL_ST_BEFORE:
202 case SSL_ST_CONNECT:
203 case SSL_ST_BEFORE|SSL_ST_CONNECT:
204 case SSL_ST_OK|SSL_ST_CONNECT:
205
206 s->server = 0;
207
208 ssl_info_callback(s, SSL_CB_HANDSHAKE_START, 1);
209
210 if (!ssl_legacy_stack_version(s, s->version)) {
211 SSLerror(s, ERR_R_INTERNAL_ERROR);
212 ret = -1;
213 goto end;
214 }
215
216 if (!ssl_supported_tls_version_range(s,
217 &s->s3->hs.our_min_tls_version,
218 &s->s3->hs.our_max_tls_version)) {
219 SSLerror(s, SSL_R_NO_PROTOCOLS_AVAILABLE);
220 ret = -1;
221 goto end;
222 }
223
224 if (!ssl3_setup_init_buffer(s)) {
225 ret = -1;
226 goto end;
227 }
228 if (!ssl3_setup_buffers(s)) {
229 ret = -1;
230 goto end;
231 }
232 if (!ssl_init_wbio_buffer(s, 0)) {
233 ret = -1;
234 goto end;
235 }
236
237 /* don't push the buffering BIO quite yet */
238
239 if (!tls1_transcript_init(s)) {
240 ret = -1;
241 goto end;
242 }
243
244 s->s3->hs.state = SSL3_ST_CW_CLNT_HELLO_A;
245 s->ctx->internal->stats.sess_connect++;
246 s->internal->init_num = 0;
247
248 if (SSL_is_dtls(s)) {
249 /* mark client_random uninitialized */
250 memset(s->s3->client_random, 0,
251 sizeof(s->s3->client_random));
252 s->d1->send_cookie = 0;
253 s->internal->hit = 0;
254 }
255 break;
256
257 case SSL3_ST_CW_CLNT_HELLO_A:
258 case SSL3_ST_CW_CLNT_HELLO_B:
259 s->internal->shutdown = 0;
260
261 if (SSL_is_dtls(s)) {
262 /* every DTLS ClientHello resets Finished MAC */
263 tls1_transcript_reset(s);
264
265 dtls1_start_timer(s);
266 }
267
268 ret = ssl3_send_client_hello(s);
269 if (ret <= 0)
270 goto end;
271
272 if (SSL_is_dtls(s) && s->d1->send_cookie) {
273 s->s3->hs.state = SSL3_ST_CW_FLUSH;
274 s->s3->hs.tls12.next_state = SSL3_ST_CR_SRVR_HELLO_A;
275 } else
276 s->s3->hs.state = SSL3_ST_CR_SRVR_HELLO_A;
277
278 s->internal->init_num = 0;
279
280 /* turn on buffering for the next lot of output */
281 if (s->bbio != s->wbio)
282 s->wbio = BIO_push(s->bbio, s->wbio);
283
284 break;
285
286 case SSL3_ST_CR_SRVR_HELLO_A:
287 case SSL3_ST_CR_SRVR_HELLO_B:
288 ret = ssl3_get_server_hello(s);
289 if (ret <= 0)
290 goto end;
291
292 if (s->internal->hit) {
293 s->s3->hs.state = SSL3_ST_CR_FINISHED_A;
294 if (!SSL_is_dtls(s)) {
295 if (s->internal->tlsext_ticket_expected) {
296 /* receive renewed session ticket */
297 s->s3->hs.state = SSL3_ST_CR_SESSION_TICKET_A;
298 }
299
300 /* No client certificate verification. */
301 tls1_transcript_free(s);
302 }
303 } else if (SSL_is_dtls(s)) {
304 s->s3->hs.state = DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A;
305 } else {
306 s->s3->hs.state = SSL3_ST_CR_CERT_A;
307 }
308 s->internal->init_num = 0;
309 break;
310
311 case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A:
312 case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B:
313 ret = ssl3_get_dtls_hello_verify(s);
314 if (ret <= 0)
315 goto end;
316 dtls1_stop_timer(s);
317 if (s->d1->send_cookie) /* start again, with a cookie */
318 s->s3->hs.state = SSL3_ST_CW_CLNT_HELLO_A;
319 else
320 s->s3->hs.state = SSL3_ST_CR_CERT_A;
321 s->internal->init_num = 0;
322 break;
323
324 case SSL3_ST_CR_CERT_A:
325 case SSL3_ST_CR_CERT_B:
326 ret = ssl3_check_finished(s);
327 if (ret <= 0)
328 goto end;
329 if (ret == 2) {
330 s->internal->hit = 1;
331 if (s->internal->tlsext_ticket_expected)
332 s->s3->hs.state = SSL3_ST_CR_SESSION_TICKET_A;
333 else
334 s->s3->hs.state = SSL3_ST_CR_FINISHED_A;
335 s->internal->init_num = 0;
336 break;
337 }
338 /* Check if it is anon DH/ECDH. */
339 if (!(s->s3->hs.cipher->algorithm_auth &
340 SSL_aNULL)) {
341 ret = ssl3_get_server_certificate(s);
342 if (ret <= 0)
343 goto end;
344 if (s->internal->tlsext_status_expected)
345 s->s3->hs.state = SSL3_ST_CR_CERT_STATUS_A;
346 else
347 s->s3->hs.state = SSL3_ST_CR_KEY_EXCH_A;
348 } else {
349 skip = 1;
350 s->s3->hs.state = SSL3_ST_CR_KEY_EXCH_A;
351 }
352 s->internal->init_num = 0;
353 break;
354
355 case SSL3_ST_CR_KEY_EXCH_A:
356 case SSL3_ST_CR_KEY_EXCH_B:
357 ret = ssl3_get_server_key_exchange(s);
358 if (ret <= 0)
359 goto end;
360 s->s3->hs.state = SSL3_ST_CR_CERT_REQ_A;
361 s->internal->init_num = 0;
362
363 /*
364 * At this point we check that we have the
365 * required stuff from the server.
366 */
367 if (!ssl3_check_cert_and_algorithm(s)) {
368 ret = -1;
369 goto end;
370 }
371 break;
372
373 case SSL3_ST_CR_CERT_REQ_A:
374 case SSL3_ST_CR_CERT_REQ_B:
375 ret = ssl3_get_certificate_request(s);
376 if (ret <= 0)
377 goto end;
378 s->s3->hs.state = SSL3_ST_CR_SRVR_DONE_A;
379 s->internal->init_num = 0;
380 break;
381
382 case SSL3_ST_CR_SRVR_DONE_A:
383 case SSL3_ST_CR_SRVR_DONE_B:
384 ret = ssl3_get_server_done(s);
385 if (ret <= 0)
386 goto end;
387 if (SSL_is_dtls(s))
388 dtls1_stop_timer(s);
389 if (s->s3->hs.tls12.cert_request)
390 s->s3->hs.state = SSL3_ST_CW_CERT_A;
391 else
392 s->s3->hs.state = SSL3_ST_CW_KEY_EXCH_A;
393 s->internal->init_num = 0;
394
395 break;
396
397 case SSL3_ST_CW_CERT_A:
398 case SSL3_ST_CW_CERT_B:
399 case SSL3_ST_CW_CERT_C:
400 case SSL3_ST_CW_CERT_D:
401 if (SSL_is_dtls(s))
402 dtls1_start_timer(s);
403 ret = ssl3_send_client_certificate(s);
404 if (ret <= 0)
405 goto end;
406 s->s3->hs.state = SSL3_ST_CW_KEY_EXCH_A;
407 s->internal->init_num = 0;
408 break;
409
410 case SSL3_ST_CW_KEY_EXCH_A:
411 case SSL3_ST_CW_KEY_EXCH_B:
412 if (SSL_is_dtls(s))
413 dtls1_start_timer(s);
414 ret = ssl3_send_client_key_exchange(s);
415 if (ret <= 0)
416 goto end;
417 /*
418 * EAY EAY EAY need to check for DH fix cert
419 * sent back
420 */
421 /*
422 * For TLS, cert_req is set to 2, so a cert chain
423 * of nothing is sent, but no verify packet is sent
424 */
425 /*
426 * XXX: For now, we do not support client
427 * authentication in ECDH cipher suites with
428 * ECDH (rather than ECDSA) certificates.
429 * We need to skip the certificate verify
430 * message when client's ECDH public key is sent
431 * inside the client certificate.
432 */
433 if (s->s3->hs.tls12.cert_request == 1) {
434 s->s3->hs.state = SSL3_ST_CW_CERT_VRFY_A;
435 } else {
436 s->s3->hs.state = SSL3_ST_CW_CHANGE_A;
437 s->s3->change_cipher_spec = 0;
438 }
439 if (!SSL_is_dtls(s)) {
440 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
441 s->s3->hs.state = SSL3_ST_CW_CHANGE_A;
442 s->s3->change_cipher_spec = 0;
443 }
444 }
445
446 s->internal->init_num = 0;
447 break;
448
449 case SSL3_ST_CW_CERT_VRFY_A:
450 case SSL3_ST_CW_CERT_VRFY_B:
451 if (SSL_is_dtls(s))
452 dtls1_start_timer(s);
453 ret = ssl3_send_client_verify(s);
454 if (ret <= 0)
455 goto end;
456 s->s3->hs.state = SSL3_ST_CW_CHANGE_A;
457 s->internal->init_num = 0;
458 s->s3->change_cipher_spec = 0;
459 break;
460
461 case SSL3_ST_CW_CHANGE_A:
462 case SSL3_ST_CW_CHANGE_B:
463 if (SSL_is_dtls(s) && !s->internal->hit)
464 dtls1_start_timer(s);
465 ret = ssl3_send_change_cipher_spec(s,
466 SSL3_ST_CW_CHANGE_A, SSL3_ST_CW_CHANGE_B);
467 if (ret <= 0)
468 goto end;
469
470 s->s3->hs.state = SSL3_ST_CW_FINISHED_A;
471 s->internal->init_num = 0;
472 s->session->cipher = s->s3->hs.cipher;
473
474 if (!tls1_setup_key_block(s)) {
475 ret = -1;
476 goto end;
477 }
478 if (!tls1_change_write_cipher_state(s)) {
479 ret = -1;
480 goto end;
481 }
482 break;
483
484 case SSL3_ST_CW_FINISHED_A:
485 case SSL3_ST_CW_FINISHED_B:
486 if (SSL_is_dtls(s) && !s->internal->hit)
487 dtls1_start_timer(s);
488 ret = ssl3_send_finished(s, SSL3_ST_CW_FINISHED_A,
489 SSL3_ST_CW_FINISHED_B);
490 if (ret <= 0)
491 goto end;
492 if (!SSL_is_dtls(s))
493 s->s3->flags |= SSL3_FLAGS_CCS_OK;
494 s->s3->hs.state = SSL3_ST_CW_FLUSH;
495
496 /* clear flags */
497 if (s->internal->hit) {
498 s->s3->hs.tls12.next_state = SSL_ST_OK;
499 } else {
500 /* Allow NewSessionTicket if ticket expected */
501 if (s->internal->tlsext_ticket_expected)
502 s->s3->hs.tls12.next_state =
503 SSL3_ST_CR_SESSION_TICKET_A;
504 else
505 s->s3->hs.tls12.next_state =
506 SSL3_ST_CR_FINISHED_A;
507 }
508 s->internal->init_num = 0;
509 break;
510
511 case SSL3_ST_CR_SESSION_TICKET_A:
512 case SSL3_ST_CR_SESSION_TICKET_B:
513 ret = ssl3_get_new_session_ticket(s);
514 if (ret <= 0)
515 goto end;
516 s->s3->hs.state = SSL3_ST_CR_FINISHED_A;
517 s->internal->init_num = 0;
518 break;
519
520 case SSL3_ST_CR_CERT_STATUS_A:
521 case SSL3_ST_CR_CERT_STATUS_B:
522 ret = ssl3_get_cert_status(s);
523 if (ret <= 0)
524 goto end;
525 s->s3->hs.state = SSL3_ST_CR_KEY_EXCH_A;
526 s->internal->init_num = 0;
527 break;
528
529 case SSL3_ST_CR_FINISHED_A:
530 case SSL3_ST_CR_FINISHED_B:
531 if (SSL_is_dtls(s))
532 s->d1->change_cipher_spec_ok = 1;
533 else
534 s->s3->flags |= SSL3_FLAGS_CCS_OK;
535 ret = ssl3_get_finished(s, SSL3_ST_CR_FINISHED_A,
536 SSL3_ST_CR_FINISHED_B);
537 if (ret <= 0)
538 goto end;
539 if (SSL_is_dtls(s))
540 dtls1_stop_timer(s);
541
542 if (s->internal->hit)
543 s->s3->hs.state = SSL3_ST_CW_CHANGE_A;
544 else
545 s->s3->hs.state = SSL_ST_OK;
546 s->internal->init_num = 0;
547 break;
548
549 case SSL3_ST_CW_FLUSH:
550 s->internal->rwstate = SSL_WRITING;
551 if (BIO_flush(s->wbio) <= 0) {
552 if (SSL_is_dtls(s)) {
553 /* If the write error was fatal, stop trying */
554 if (!BIO_should_retry(s->wbio)) {
555 s->internal->rwstate = SSL_NOTHING;
556 s->s3->hs.state = s->s3->hs.tls12.next_state;
557 }
558 }
559 ret = -1;
560 goto end;
561 }
562 s->internal->rwstate = SSL_NOTHING;
563 s->s3->hs.state = s->s3->hs.tls12.next_state;
564 break;
565
566 case SSL_ST_OK:
567 /* clean a few things up */
568 tls1_cleanup_key_block(s);
569
570 if (s->s3->handshake_transcript != NULL) {
571 SSLerror(s, ERR_R_INTERNAL_ERROR);
572 ret = -1;
573 goto end;
574 }
575
576 if (!SSL_is_dtls(s))
577 ssl3_release_init_buffer(s);
578
579 ssl_free_wbio_buffer(s);
580
581 s->internal->init_num = 0;
582 s->internal->renegotiate = 0;
583 s->internal->new_session = 0;
584
585 ssl_update_cache(s, SSL_SESS_CACHE_CLIENT);
586 if (s->internal->hit)
587 s->ctx->internal->stats.sess_hit++;
588
589 ret = 1;
590 /* s->server=0; */
591 s->internal->handshake_func = ssl3_connect;
592 s->ctx->internal->stats.sess_connect_good++;
593
594 ssl_info_callback(s, SSL_CB_HANDSHAKE_DONE, 1);
595
596 if (SSL_is_dtls(s)) {
597 /* done with handshaking */
598 s->d1->handshake_read_seq = 0;
599 s->d1->next_handshake_write_seq = 0;
600 }
601
602 goto end;
603 /* break; */
604
605 default:
606 SSLerror(s, SSL_R_UNKNOWN_STATE);
607 ret = -1;
608 goto end;
609 /* break; */
610 }
611
612 /* did we do anything */
613 if (!s->s3->hs.tls12.reuse_message && !skip) {
614 if (s->internal->debug) {
615 if ((ret = BIO_flush(s->wbio)) <= 0)
616 goto end;
617 }
618
619 if (s->s3->hs.state != state) {
620 new_state = s->s3->hs.state;
621 s->s3->hs.state = state;
622 ssl_info_callback(s, SSL_CB_CONNECT_LOOP, 1);
623 s->s3->hs.state = new_state;
624 }
625 }
626 skip = 0;
627 }
628
629 end:
630 s->internal->in_handshake--;
631 ssl_info_callback(s, SSL_CB_CONNECT_EXIT, ret);
632
633 return (ret);
634}
635
636int
637ssl3_send_client_hello(SSL *s)
638{
639 CBB cbb, client_hello, session_id, cookie, cipher_suites;
640 CBB compression_methods;
641 uint16_t max_version;
642 size_t sl;
643
644 memset(&cbb, 0, sizeof(cbb));
645
646 if (s->s3->hs.state == SSL3_ST_CW_CLNT_HELLO_A) {
647 SSL_SESSION *sess = s->session;
648
649 if (!ssl_max_supported_version(s, &max_version)) {
650 SSLerror(s, SSL_R_NO_PROTOCOLS_AVAILABLE);
651 return (-1);
652 }
653 s->version = max_version;
654
655 if (sess == NULL ||
656 sess->ssl_version != s->version ||
657 (!sess->session_id_length && !sess->tlsext_tick) ||
658 sess->not_resumable) {
659 if (!ssl_get_new_session(s, 0))
660 goto err;
661 }
662 /* else use the pre-loaded session */
663
664 /*
665 * If a DTLS ClientHello message is being resent after a
666 * HelloVerifyRequest, we must retain the original client
667 * random value.
668 */
669 if (!SSL_is_dtls(s) || s->d1->send_cookie == 0)
670 arc4random_buf(s->s3->client_random, SSL3_RANDOM_SIZE);
671
672 if (!ssl3_handshake_msg_start(s, &cbb, &client_hello,
673 SSL3_MT_CLIENT_HELLO))
674 goto err;
675
676 if (!CBB_add_u16(&client_hello, s->version))
677 goto err;
678
679 /* Random stuff */
680 if (!CBB_add_bytes(&client_hello, s->s3->client_random,
681 sizeof(s->s3->client_random)))
682 goto err;
683
684 /* Session ID */
685 if (!CBB_add_u8_length_prefixed(&client_hello, &session_id))
686 goto err;
687 if (!s->internal->new_session &&
688 s->session->session_id_length > 0) {
689 sl = s->session->session_id_length;
690 if (sl > sizeof(s->session->session_id)) {
691 SSLerror(s, ERR_R_INTERNAL_ERROR);
692 goto err;
693 }
694 if (!CBB_add_bytes(&session_id,
695 s->session->session_id, sl))
696 goto err;
697 }
698
699 /* DTLS Cookie. */
700 if (SSL_is_dtls(s)) {
701 if (s->d1->cookie_len > sizeof(s->d1->cookie)) {
702 SSLerror(s, ERR_R_INTERNAL_ERROR);
703 goto err;
704 }
705 if (!CBB_add_u8_length_prefixed(&client_hello, &cookie))
706 goto err;
707 if (!CBB_add_bytes(&cookie, s->d1->cookie,
708 s->d1->cookie_len))
709 goto err;
710 }
711
712 /* Ciphers supported */
713 if (!CBB_add_u16_length_prefixed(&client_hello, &cipher_suites))
714 return 0;
715 if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s),
716 &cipher_suites)) {
717 SSLerror(s, SSL_R_NO_CIPHERS_AVAILABLE);
718 goto err;
719 }
720
721 /* Add in compression methods (null) */
722 if (!CBB_add_u8_length_prefixed(&client_hello,
723 &compression_methods))
724 goto err;
725 if (!CBB_add_u8(&compression_methods, 0))
726 goto err;
727
728 /* TLS extensions */
729 if (!tlsext_client_build(s, SSL_TLSEXT_MSG_CH, &client_hello)) {
730 SSLerror(s, ERR_R_INTERNAL_ERROR);
731 goto err;
732 }
733
734 if (!ssl3_handshake_msg_finish(s, &cbb))
735 goto err;
736
737 s->s3->hs.state = SSL3_ST_CW_CLNT_HELLO_B;
738 }
739
740 /* SSL3_ST_CW_CLNT_HELLO_B */
741 return (ssl3_handshake_write(s));
742
743 err:
744 CBB_cleanup(&cbb);
745
746 return (-1);
747}
748
749int
750ssl3_get_dtls_hello_verify(SSL *s)
751{
752 CBS hello_verify_request, cookie;
753 size_t cookie_len;
754 uint16_t ssl_version;
755 int al, ret;
756
757 if ((ret = ssl3_get_message(s, DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A,
758 DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B, -1, s->internal->max_cert_list)) <= 0)
759 return ret;
760
761 if (s->s3->hs.tls12.message_type != DTLS1_MT_HELLO_VERIFY_REQUEST) {
762 s->d1->send_cookie = 0;
763 s->s3->hs.tls12.reuse_message = 1;
764 return (1);
765 }
766
767 if (s->internal->init_num < 0)
768 goto decode_err;
769
770 CBS_init(&hello_verify_request, s->internal->init_msg,
771 s->internal->init_num);
772
773 if (!CBS_get_u16(&hello_verify_request, &ssl_version))
774 goto decode_err;
775 if (!CBS_get_u8_length_prefixed(&hello_verify_request, &cookie))
776 goto decode_err;
777 if (CBS_len(&hello_verify_request) != 0)
778 goto decode_err;
779
780 /*
781 * Per RFC 6347 section 4.2.1, the HelloVerifyRequest should always
782 * contain DTLSv1.0 the version that is going to be negotiated.
783 * Tolerate DTLSv1.2 just in case.
784 */
785 if (ssl_version != DTLS1_VERSION && ssl_version != DTLS1_2_VERSION) {
786 SSLerror(s, SSL_R_WRONG_SSL_VERSION);
787 s->version = (s->version & 0xff00) | (ssl_version & 0xff);
788 al = SSL_AD_PROTOCOL_VERSION;
789 goto fatal_err;
790 }
791
792 if (!CBS_write_bytes(&cookie, s->d1->cookie,
793 sizeof(s->d1->cookie), &cookie_len)) {
794 s->d1->cookie_len = 0;
795 al = SSL_AD_ILLEGAL_PARAMETER;
796 goto fatal_err;
797 }
798 s->d1->cookie_len = cookie_len;
799 s->d1->send_cookie = 1;
800
801 return 1;
802
803 decode_err:
804 al = SSL_AD_DECODE_ERROR;
805 fatal_err:
806 ssl3_send_alert(s, SSL3_AL_FATAL, al);
807 return -1;
808}
809
810int
811ssl3_get_server_hello(SSL *s)
812{
813 CBS cbs, server_random, session_id;
814 uint16_t server_version, cipher_suite;
815 uint8_t compression_method;
816 const SSL_CIPHER *cipher;
817 const SSL_METHOD *method;
818 unsigned long alg_k;
819 size_t outlen;
820 int al, ret;
821
822 s->internal->first_packet = 1;
823 if ((ret = ssl3_get_message(s, SSL3_ST_CR_SRVR_HELLO_A,
824 SSL3_ST_CR_SRVR_HELLO_B, -1, 20000 /* ?? */)) <= 0)
825 return ret;
826 s->internal->first_packet = 0;
827
828 if (s->internal->init_num < 0)
829 goto decode_err;
830
831 CBS_init(&cbs, s->internal->init_msg, s->internal->init_num);
832
833 if (SSL_is_dtls(s)) {
834 if (s->s3->hs.tls12.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) {
835 if (s->d1->send_cookie == 0) {
836 s->s3->hs.tls12.reuse_message = 1;
837 return (1);
838 } else {
839 /* Already sent a cookie. */
840 al = SSL_AD_UNEXPECTED_MESSAGE;
841 SSLerror(s, SSL_R_BAD_MESSAGE_TYPE);
842 goto fatal_err;
843 }
844 }
845 }
846
847 if (s->s3->hs.tls12.message_type != SSL3_MT_SERVER_HELLO) {
848 al = SSL_AD_UNEXPECTED_MESSAGE;
849 SSLerror(s, SSL_R_BAD_MESSAGE_TYPE);
850 goto fatal_err;
851 }
852
853 if (!CBS_get_u16(&cbs, &server_version))
854 goto decode_err;
855
856 if (!ssl_check_version_from_server(s, server_version)) {
857 SSLerror(s, SSL_R_WRONG_SSL_VERSION);
858 s->version = (s->version & 0xff00) | (server_version & 0xff);
859 al = SSL_AD_PROTOCOL_VERSION;
860 goto fatal_err;
861 }
862 s->s3->hs.peer_legacy_version = server_version;
863 s->version = server_version;
864
865 s->s3->hs.negotiated_tls_version = ssl_tls_version(server_version);
866 if (s->s3->hs.negotiated_tls_version == 0) {
867 SSLerror(s, ERR_R_INTERNAL_ERROR);
868 goto err;
869 }
870
871 if ((method = ssl_get_method(server_version)) == NULL) {
872 SSLerror(s, ERR_R_INTERNAL_ERROR);
873 goto err;
874 }
875 s->method = method;
876
877 /* Server random. */
878 if (!CBS_get_bytes(&cbs, &server_random, SSL3_RANDOM_SIZE))
879 goto decode_err;
880 if (!CBS_write_bytes(&server_random, s->s3->server_random,
881 sizeof(s->s3->server_random), NULL))
882 goto err;
883
884 if (s->s3->hs.our_max_tls_version >= TLS1_2_VERSION &&
885 s->s3->hs.negotiated_tls_version < s->s3->hs.our_max_tls_version) {
886 /*
887 * RFC 8446 section 4.1.3. We must not downgrade if the server
888 * random value contains the TLS 1.2 or TLS 1.1 magical value.
889 */
890 if (!CBS_skip(&server_random,
891 CBS_len(&server_random) - sizeof(tls13_downgrade_12)))
892 goto err;
893 if (s->s3->hs.negotiated_tls_version == TLS1_2_VERSION &&
894 CBS_mem_equal(&server_random, tls13_downgrade_12,
895 sizeof(tls13_downgrade_12))) {
896 al = SSL_AD_ILLEGAL_PARAMETER;
897 SSLerror(s, SSL_R_INAPPROPRIATE_FALLBACK);
898 goto fatal_err;
899 }
900 if (CBS_mem_equal(&server_random, tls13_downgrade_11,
901 sizeof(tls13_downgrade_11))) {
902 al = SSL_AD_ILLEGAL_PARAMETER;
903 SSLerror(s, SSL_R_INAPPROPRIATE_FALLBACK);
904 goto fatal_err;
905 }
906 }
907
908 /* Session ID. */
909 if (!CBS_get_u8_length_prefixed(&cbs, &session_id))
910 goto decode_err;
911
912 if (CBS_len(&session_id) > SSL3_SESSION_ID_SIZE) {
913 al = SSL_AD_ILLEGAL_PARAMETER;
914 SSLerror(s, SSL_R_SSL3_SESSION_ID_TOO_LONG);
915 goto fatal_err;
916 }
917
918 /* Cipher suite. */
919 if (!CBS_get_u16(&cbs, &cipher_suite))
920 goto decode_err;
921
922 /*
923 * Check if we want to resume the session based on external
924 * pre-shared secret.
925 */
926 if (s->internal->tls_session_secret_cb) {
927 SSL_CIPHER *pref_cipher = NULL;
928 s->session->master_key_length = sizeof(s->session->master_key);
929 if (s->internal->tls_session_secret_cb(s, s->session->master_key,
930 &s->session->master_key_length, NULL, &pref_cipher,
931 s->internal->tls_session_secret_cb_arg)) {
932 s->session->cipher = pref_cipher ? pref_cipher :
933 ssl3_get_cipher_by_value(cipher_suite);
934 s->s3->flags |= SSL3_FLAGS_CCS_OK;
935 }
936 }
937
938 if (s->session->session_id_length != 0 &&
939 CBS_mem_equal(&session_id, s->session->session_id,
940 s->session->session_id_length)) {
941 if (s->sid_ctx_length != s->session->sid_ctx_length ||
942 timingsafe_memcmp(s->session->sid_ctx,
943 s->sid_ctx, s->sid_ctx_length) != 0) {
944 /* actually a client application bug */
945 al = SSL_AD_ILLEGAL_PARAMETER;
946 SSLerror(s, SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
947 goto fatal_err;
948 }
949 s->s3->flags |= SSL3_FLAGS_CCS_OK;
950 s->internal->hit = 1;
951 } else {
952 /* a miss or crap from the other end */
953
954 /* If we were trying for session-id reuse, make a new
955 * SSL_SESSION so we don't stuff up other people */
956 s->internal->hit = 0;
957 if (s->session->session_id_length > 0) {
958 if (!ssl_get_new_session(s, 0)) {
959 al = SSL_AD_INTERNAL_ERROR;
960 goto fatal_err;
961 }
962 }
963
964 /*
965 * XXX - improve the handling for the case where there is a
966 * zero length session identifier.
967 */
968 if (!CBS_write_bytes(&session_id, s->session->session_id,
969 sizeof(s->session->session_id), &outlen))
970 goto err;
971 s->session->session_id_length = outlen;
972
973 s->session->ssl_version = s->version;
974 }
975
976 if ((cipher = ssl3_get_cipher_by_value(cipher_suite)) == NULL) {
977 al = SSL_AD_ILLEGAL_PARAMETER;
978 SSLerror(s, SSL_R_UNKNOWN_CIPHER_RETURNED);
979 goto fatal_err;
980 }
981
982 /* TLS v1.2 only ciphersuites require v1.2 or later. */
983 if ((cipher->algorithm_ssl & SSL_TLSV1_2) &&
984 s->s3->hs.negotiated_tls_version < TLS1_2_VERSION) {
985 al = SSL_AD_ILLEGAL_PARAMETER;
986 SSLerror(s, SSL_R_WRONG_CIPHER_RETURNED);
987 goto fatal_err;
988 }
989
990 if (!ssl_cipher_in_list(SSL_get_ciphers(s), cipher)) {
991 /* we did not say we would use this cipher */
992 al = SSL_AD_ILLEGAL_PARAMETER;
993 SSLerror(s, SSL_R_WRONG_CIPHER_RETURNED);
994 goto fatal_err;
995 }
996
997 /*
998 * Depending on the session caching (internal/external), the cipher
999 * and/or cipher_id values may not be set. Make sure that
1000 * cipher_id is set and use it for comparison.
1001 */
1002 if (s->session->cipher)
1003 s->session->cipher_id = s->session->cipher->id;
1004 if (s->internal->hit && (s->session->cipher_id != cipher->id)) {
1005 al = SSL_AD_ILLEGAL_PARAMETER;
1006 SSLerror(s, SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1007 goto fatal_err;
1008 }
1009 s->s3->hs.cipher = cipher;
1010
1011 if (!tls1_transcript_hash_init(s))
1012 goto err;
1013
1014 /*
1015 * Don't digest cached records if no sigalgs: we may need them for
1016 * client authentication.
1017 */
1018 alg_k = s->s3->hs.cipher->algorithm_mkey;
1019 if (!(SSL_USE_SIGALGS(s) || (alg_k & SSL_kGOST)))
1020 tls1_transcript_free(s);
1021
1022 if (!CBS_get_u8(&cbs, &compression_method))
1023 goto decode_err;
1024
1025 if (compression_method != 0) {
1026 al = SSL_AD_ILLEGAL_PARAMETER;
1027 SSLerror(s, SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1028 goto fatal_err;
1029 }
1030
1031 if (!tlsext_client_parse(s, SSL_TLSEXT_MSG_SH, &cbs, &al)) {
1032 SSLerror(s, SSL_R_PARSE_TLSEXT);
1033 goto fatal_err;
1034 }
1035
1036 if (CBS_len(&cbs) != 0)
1037 goto decode_err;
1038
1039 /*
1040 * Determine if we need to see RI. Strictly speaking if we want to
1041 * avoid an attack we should *always* see RI even on initial server
1042 * hello because the client doesn't see any renegotiation during an
1043 * attack. However this would mean we could not connect to any server
1044 * which doesn't support RI so for the immediate future tolerate RI
1045 * absence on initial connect only.
1046 */
1047 if (!s->s3->renegotiate_seen &&
1048 !(s->internal->options & SSL_OP_LEGACY_SERVER_CONNECT)) {
1049 al = SSL_AD_HANDSHAKE_FAILURE;
1050 SSLerror(s, SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
1051 goto fatal_err;
1052 }
1053
1054 if (ssl_check_serverhello_tlsext(s) <= 0) {
1055 SSLerror(s, SSL_R_SERVERHELLO_TLSEXT);
1056 goto err;
1057 }
1058
1059 return (1);
1060
1061 decode_err:
1062 /* wrong packet length */
1063 al = SSL_AD_DECODE_ERROR;
1064 SSLerror(s, SSL_R_BAD_PACKET_LENGTH);
1065 fatal_err:
1066 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1067 err:
1068 return (-1);
1069}
1070
1071int
1072ssl3_get_server_certificate(SSL *s)
1073{
1074 CBS cbs, cert_list;
1075 X509 *x = NULL;
1076 const unsigned char *q;
1077 STACK_OF(X509) *sk = NULL;
1078 EVP_PKEY *pkey;
1079 int cert_type;
1080 int al, ret;
1081
1082 if ((ret = ssl3_get_message(s, SSL3_ST_CR_CERT_A,
1083 SSL3_ST_CR_CERT_B, -1, s->internal->max_cert_list)) <= 0)
1084 return ret;
1085
1086 ret = -1;
1087
1088 if (s->s3->hs.tls12.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) {
1089 s->s3->hs.tls12.reuse_message = 1;
1090 return (1);
1091 }
1092
1093 if (s->s3->hs.tls12.message_type != SSL3_MT_CERTIFICATE) {
1094 al = SSL_AD_UNEXPECTED_MESSAGE;
1095 SSLerror(s, SSL_R_BAD_MESSAGE_TYPE);
1096 goto fatal_err;
1097 }
1098
1099 if ((sk = sk_X509_new_null()) == NULL) {
1100 SSLerror(s, ERR_R_MALLOC_FAILURE);
1101 goto err;
1102 }
1103
1104 if (s->internal->init_num < 0)
1105 goto decode_err;
1106
1107 CBS_init(&cbs, s->internal->init_msg, s->internal->init_num);
1108 if (CBS_len(&cbs) < 3)
1109 goto decode_err;
1110
1111 if (!CBS_get_u24_length_prefixed(&cbs, &cert_list) ||
1112 CBS_len(&cbs) != 0) {
1113 al = SSL_AD_DECODE_ERROR;
1114 SSLerror(s, SSL_R_LENGTH_MISMATCH);
1115 goto fatal_err;
1116 }
1117
1118 while (CBS_len(&cert_list) > 0) {
1119 CBS cert;
1120
1121 if (CBS_len(&cert_list) < 3)
1122 goto decode_err;
1123 if (!CBS_get_u24_length_prefixed(&cert_list, &cert)) {
1124 al = SSL_AD_DECODE_ERROR;
1125 SSLerror(s, SSL_R_CERT_LENGTH_MISMATCH);
1126 goto fatal_err;
1127 }
1128
1129 q = CBS_data(&cert);
1130 x = d2i_X509(NULL, &q, CBS_len(&cert));
1131 if (x == NULL) {
1132 al = SSL_AD_BAD_CERTIFICATE;
1133 SSLerror(s, ERR_R_ASN1_LIB);
1134 goto fatal_err;
1135 }
1136 if (q != CBS_data(&cert) + CBS_len(&cert)) {
1137 al = SSL_AD_DECODE_ERROR;
1138 SSLerror(s, SSL_R_CERT_LENGTH_MISMATCH);
1139 goto fatal_err;
1140 }
1141 if (!sk_X509_push(sk, x)) {
1142 SSLerror(s, ERR_R_MALLOC_FAILURE);
1143 goto err;
1144 }
1145 x = NULL;
1146 }
1147
1148 if (ssl_verify_cert_chain(s, sk) <= 0 &&
1149 s->verify_mode != SSL_VERIFY_NONE) {
1150 al = ssl_verify_alarm_type(s->verify_result);
1151 SSLerror(s, SSL_R_CERTIFICATE_VERIFY_FAILED);
1152 goto fatal_err;
1153 }
1154 ERR_clear_error(); /* but we keep s->verify_result */
1155
1156 /*
1157 * Inconsistency alert: cert_chain does include the peer's
1158 * certificate, which we don't include in s3_srvr.c
1159 */
1160 x = sk_X509_value(sk, 0);
1161
1162 if ((pkey = X509_get0_pubkey(x)) == NULL ||
1163 EVP_PKEY_missing_parameters(pkey)) {
1164 x = NULL;
1165 al = SSL3_AL_FATAL;
1166 SSLerror(s, SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1167 goto fatal_err;
1168 }
1169 if ((cert_type = ssl_cert_type(pkey)) < 0) {
1170 x = NULL;
1171 al = SSL3_AL_FATAL;
1172 SSLerror(s, SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1173 goto fatal_err;
1174 }
1175
1176 X509_up_ref(x);
1177 X509_free(s->session->peer_cert);
1178 s->session->peer_cert = x;
1179 s->session->peer_cert_type = cert_type;
1180
1181 s->session->verify_result = s->verify_result;
1182
1183 sk_X509_pop_free(s->session->cert_chain, X509_free);
1184 s->session->cert_chain = sk;
1185 sk = NULL;
1186
1187 x = NULL;
1188 ret = 1;
1189
1190 if (0) {
1191 decode_err:
1192 /* wrong packet length */
1193 al = SSL_AD_DECODE_ERROR;
1194 SSLerror(s, SSL_R_BAD_PACKET_LENGTH);
1195 fatal_err:
1196 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1197 }
1198 err:
1199 X509_free(x);
1200 sk_X509_pop_free(sk, X509_free);
1201
1202 return (ret);
1203}
1204
1205static int
1206ssl3_get_server_kex_dhe(SSL *s, CBS *cbs)
1207{
1208 int decode_error, invalid_params, invalid_key;
1209 int nid = NID_dhKeyAgreement;
1210
1211 tls_key_share_free(s->s3->hs.key_share);
1212 if ((s->s3->hs.key_share = tls_key_share_new_nid(nid)) == NULL)
1213 goto err;
1214
1215 if (!tls_key_share_peer_params(s->s3->hs.key_share, cbs,
1216 &decode_error, &invalid_params)) {
1217 if (decode_error) {
1218 SSLerror(s, SSL_R_BAD_PACKET_LENGTH);
1219 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1220 }
1221 goto err;
1222 }
1223 if (!tls_key_share_peer_public(s->s3->hs.key_share, cbs,
1224 &decode_error, &invalid_key)) {
1225 if (decode_error) {
1226 SSLerror(s, SSL_R_BAD_PACKET_LENGTH);
1227 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1228 }
1229 goto err;
1230 }
1231
1232 if (invalid_params) {
1233 SSLerror(s, SSL_R_BAD_DH_P_LENGTH);
1234 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER);
1235 goto err;
1236 }
1237 if (invalid_key) {
1238 SSLerror(s, SSL_R_BAD_DH_PUB_KEY_LENGTH);
1239 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER);
1240 goto err;
1241 }
1242
1243 return 1;
1244
1245 err:
1246 return 0;
1247}
1248
1249static int
1250ssl3_get_server_kex_ecdhe(SSL *s, CBS *cbs)
1251{
1252 uint8_t curve_type;
1253 uint16_t curve_id;
1254 int decode_error;
1255 CBS public;
1256
1257 if (!CBS_get_u8(cbs, &curve_type))
1258 goto decode_err;
1259 if (!CBS_get_u16(cbs, &curve_id))
1260 goto decode_err;
1261
1262 /* Only named curves are supported. */
1263 if (curve_type != NAMED_CURVE_TYPE) {
1264 SSLerror(s, SSL_R_UNSUPPORTED_ELLIPTIC_CURVE);
1265 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
1266 goto err;
1267 }
1268
1269 if (!CBS_get_u8_length_prefixed(cbs, &public))
1270 goto decode_err;
1271
1272 /*
1273 * Check that the curve is one of our preferences - if it is not,
1274 * the server has sent us an invalid curve.
1275 */
1276 if (!tls1_check_curve(s, curve_id)) {
1277 SSLerror(s, SSL_R_WRONG_CURVE);
1278 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER);
1279 goto err;
1280 }
1281
1282 tls_key_share_free(s->s3->hs.key_share);
1283 if ((s->s3->hs.key_share = tls_key_share_new(curve_id)) == NULL)
1284 goto err;
1285
1286 if (!tls_key_share_peer_public(s->s3->hs.key_share, &public,
1287 &decode_error, NULL)) {
1288 if (decode_error)
1289 goto decode_err;
1290 goto err;
1291 }
1292
1293 return 1;
1294
1295 decode_err:
1296 SSLerror(s, SSL_R_BAD_PACKET_LENGTH);
1297 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1298 err:
1299 return 0;
1300}
1301
1302int
1303ssl3_get_server_key_exchange(SSL *s)
1304{
1305 CBS cbs, signature;
1306 EVP_MD_CTX *md_ctx;
1307 const unsigned char *param;
1308 size_t param_len;
1309 long alg_k, alg_a;
1310 int al, ret;
1311
1312 alg_k = s->s3->hs.cipher->algorithm_mkey;
1313 alg_a = s->s3->hs.cipher->algorithm_auth;
1314
1315 /*
1316 * Use same message size as in ssl3_get_certificate_request()
1317 * as ServerKeyExchange message may be skipped.
1318 */
1319 if ((ret = ssl3_get_message(s, SSL3_ST_CR_KEY_EXCH_A,
1320 SSL3_ST_CR_KEY_EXCH_B, -1, s->internal->max_cert_list)) <= 0)
1321 return ret;
1322
1323 if ((md_ctx = EVP_MD_CTX_new()) == NULL)
1324 goto err;
1325
1326 if (s->internal->init_num < 0)
1327 goto err;
1328
1329 CBS_init(&cbs, s->internal->init_msg, s->internal->init_num);
1330
1331 if (s->s3->hs.tls12.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) {
1332 /*
1333 * Do not skip server key exchange if this cipher suite uses
1334 * ephemeral keys.
1335 */
1336 if (alg_k & (SSL_kDHE|SSL_kECDHE)) {
1337 SSLerror(s, SSL_R_UNEXPECTED_MESSAGE);
1338 al = SSL_AD_UNEXPECTED_MESSAGE;
1339 goto fatal_err;
1340 }
1341
1342 s->s3->hs.tls12.reuse_message = 1;
1343 EVP_MD_CTX_free(md_ctx);
1344 return (1);
1345 }
1346
1347 param = CBS_data(&cbs);
1348 param_len = CBS_len(&cbs);
1349
1350 if (alg_k & SSL_kDHE) {
1351 if (!ssl3_get_server_kex_dhe(s, &cbs))
1352 goto err;
1353 } else if (alg_k & SSL_kECDHE) {
1354 if (!ssl3_get_server_kex_ecdhe(s, &cbs))
1355 goto err;
1356 } else if (alg_k != 0) {
1357 al = SSL_AD_UNEXPECTED_MESSAGE;
1358 SSLerror(s, SSL_R_UNEXPECTED_MESSAGE);
1359 goto fatal_err;
1360 }
1361
1362 param_len -= CBS_len(&cbs);
1363
1364 /* if it was signed, check the signature */
1365 if ((alg_a & SSL_aNULL) == 0) {
1366 uint16_t sigalg_value = SIGALG_NONE;
1367 const struct ssl_sigalg *sigalg;
1368 EVP_PKEY_CTX *pctx;
1369 EVP_PKEY *pkey = NULL;
1370
1371 if ((alg_a & SSL_aRSA) != 0 &&
1372 s->session->peer_cert_type == SSL_PKEY_RSA) {
1373 pkey = X509_get0_pubkey(s->session->peer_cert);
1374 } else if ((alg_a & SSL_aECDSA) != 0 &&
1375 s->session->peer_cert_type == SSL_PKEY_ECC) {
1376 pkey = X509_get0_pubkey(s->session->peer_cert);
1377 }
1378 if (pkey == NULL) {
1379 al = SSL_AD_ILLEGAL_PARAMETER;
1380 SSLerror(s, SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1381 goto fatal_err;
1382 }
1383
1384 if (SSL_USE_SIGALGS(s)) {
1385 if (!CBS_get_u16(&cbs, &sigalg_value))
1386 goto decode_err;
1387 }
1388 if (!CBS_get_u16_length_prefixed(&cbs, &signature))
1389 goto decode_err;
1390 if (CBS_len(&signature) > EVP_PKEY_size(pkey)) {
1391 al = SSL_AD_DECODE_ERROR;
1392 SSLerror(s, SSL_R_WRONG_SIGNATURE_LENGTH);
1393 goto fatal_err;
1394 }
1395
1396 if ((sigalg = ssl_sigalg_for_peer(s, pkey,
1397 sigalg_value)) == NULL) {
1398 al = SSL_AD_DECODE_ERROR;
1399 goto fatal_err;
1400 }
1401 s->s3->hs.peer_sigalg = sigalg;
1402
1403 if (!EVP_DigestVerifyInit(md_ctx, &pctx, sigalg->md(),
1404 NULL, pkey))
1405 goto err;
1406 if (!EVP_DigestVerifyUpdate(md_ctx, s->s3->client_random,
1407 SSL3_RANDOM_SIZE))
1408 goto err;
1409 if ((sigalg->flags & SIGALG_FLAG_RSA_PSS) &&
1410 (!EVP_PKEY_CTX_set_rsa_padding(pctx,
1411 RSA_PKCS1_PSS_PADDING) ||
1412 !EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, -1)))
1413 goto err;
1414 if (!EVP_DigestVerifyUpdate(md_ctx, s->s3->server_random,
1415 SSL3_RANDOM_SIZE))
1416 goto err;
1417 if (!EVP_DigestVerifyUpdate(md_ctx, param, param_len))
1418 goto err;
1419 if (EVP_DigestVerifyFinal(md_ctx, CBS_data(&signature),
1420 CBS_len(&signature)) <= 0) {
1421 al = SSL_AD_DECRYPT_ERROR;
1422 SSLerror(s, SSL_R_BAD_SIGNATURE);
1423 goto fatal_err;
1424 }
1425 }
1426
1427 if (CBS_len(&cbs) != 0) {
1428 al = SSL_AD_DECODE_ERROR;
1429 SSLerror(s, SSL_R_EXTRA_DATA_IN_MESSAGE);
1430 goto fatal_err;
1431 }
1432
1433 EVP_MD_CTX_free(md_ctx);
1434
1435 return (1);
1436
1437 decode_err:
1438 al = SSL_AD_DECODE_ERROR;
1439 SSLerror(s, SSL_R_BAD_PACKET_LENGTH);
1440
1441 fatal_err:
1442 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1443
1444 err:
1445 EVP_MD_CTX_free(md_ctx);
1446
1447 return (-1);
1448}
1449
1450int
1451ssl3_get_certificate_request(SSL *s)
1452{
1453 CBS cert_request, cert_types, rdn_list;
1454 X509_NAME *xn = NULL;
1455 const unsigned char *q;
1456 STACK_OF(X509_NAME) *ca_sk = NULL;
1457 int ret;
1458
1459 if ((ret = ssl3_get_message(s, SSL3_ST_CR_CERT_REQ_A,
1460 SSL3_ST_CR_CERT_REQ_B, -1, s->internal->max_cert_list)) <= 0)
1461 return ret;
1462
1463 ret = 0;
1464
1465 s->s3->hs.tls12.cert_request = 0;
1466
1467 if (s->s3->hs.tls12.message_type == SSL3_MT_SERVER_DONE) {
1468 s->s3->hs.tls12.reuse_message = 1;
1469 /*
1470 * If we get here we don't need any cached handshake records
1471 * as we wont be doing client auth.
1472 */
1473 tls1_transcript_free(s);
1474 return (1);
1475 }
1476
1477 if (s->s3->hs.tls12.message_type != SSL3_MT_CERTIFICATE_REQUEST) {
1478 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
1479 SSLerror(s, SSL_R_WRONG_MESSAGE_TYPE);
1480 goto err;
1481 }
1482
1483 /* TLS does not like anon-DH with client cert */
1484 if (s->s3->hs.cipher->algorithm_auth & SSL_aNULL) {
1485 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
1486 SSLerror(s, SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1487 goto err;
1488 }
1489
1490 if (s->internal->init_num < 0)
1491 goto decode_err;
1492 CBS_init(&cert_request, s->internal->init_msg, s->internal->init_num);
1493
1494 if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) {
1495 SSLerror(s, ERR_R_MALLOC_FAILURE);
1496 goto err;
1497 }
1498
1499 if (!CBS_get_u8_length_prefixed(&cert_request, &cert_types))
1500 goto decode_err;
1501
1502 if (SSL_USE_SIGALGS(s)) {
1503 CBS sigalgs;
1504
1505 if (CBS_len(&cert_request) < 2) {
1506 SSLerror(s, SSL_R_DATA_LENGTH_TOO_LONG);
1507 goto err;
1508 }
1509 if (!CBS_get_u16_length_prefixed(&cert_request, &sigalgs)) {
1510 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1511 SSLerror(s, SSL_R_DATA_LENGTH_TOO_LONG);
1512 goto err;
1513 }
1514 if (CBS_len(&sigalgs) % 2 != 0 || CBS_len(&sigalgs) > 64) {
1515 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1516 SSLerror(s, SSL_R_SIGNATURE_ALGORITHMS_ERROR);
1517 goto err;
1518 }
1519 if (!CBS_stow(&sigalgs, &s->s3->hs.sigalgs,
1520 &s->s3->hs.sigalgs_len))
1521 goto err;
1522 }
1523
1524 /* get the CA RDNs */
1525 if (CBS_len(&cert_request) < 2) {
1526 SSLerror(s, SSL_R_DATA_LENGTH_TOO_LONG);
1527 goto err;
1528 }
1529
1530 if (!CBS_get_u16_length_prefixed(&cert_request, &rdn_list) ||
1531 CBS_len(&cert_request) != 0) {
1532 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1533 SSLerror(s, SSL_R_LENGTH_MISMATCH);
1534 goto err;
1535 }
1536
1537 while (CBS_len(&rdn_list) > 0) {
1538 CBS rdn;
1539
1540 if (CBS_len(&rdn_list) < 2) {
1541 SSLerror(s, SSL_R_DATA_LENGTH_TOO_LONG);
1542 goto err;
1543 }
1544
1545 if (!CBS_get_u16_length_prefixed(&rdn_list, &rdn)) {
1546 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1547 SSLerror(s, SSL_R_CA_DN_TOO_LONG);
1548 goto err;
1549 }
1550
1551 q = CBS_data(&rdn);
1552 if ((xn = d2i_X509_NAME(NULL, &q, CBS_len(&rdn))) == NULL) {
1553 ssl3_send_alert(s, SSL3_AL_FATAL,
1554 SSL_AD_DECODE_ERROR);
1555 SSLerror(s, ERR_R_ASN1_LIB);
1556 goto err;
1557 }
1558
1559 if (q != CBS_data(&rdn) + CBS_len(&rdn)) {
1560 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1561 SSLerror(s, SSL_R_CA_DN_LENGTH_MISMATCH);
1562 goto err;
1563 }
1564 if (!sk_X509_NAME_push(ca_sk, xn)) {
1565 SSLerror(s, ERR_R_MALLOC_FAILURE);
1566 goto err;
1567 }
1568 xn = NULL; /* avoid free in err block */
1569 }
1570
1571 /* we should setup a certificate to return.... */
1572 s->s3->hs.tls12.cert_request = 1;
1573 sk_X509_NAME_pop_free(s->s3->hs.tls12.ca_names, X509_NAME_free);
1574 s->s3->hs.tls12.ca_names = ca_sk;
1575 ca_sk = NULL;
1576
1577 ret = 1;
1578 if (0) {
1579 decode_err:
1580 SSLerror(s, SSL_R_BAD_PACKET_LENGTH);
1581 }
1582 err:
1583 X509_NAME_free(xn);
1584 sk_X509_NAME_pop_free(ca_sk, X509_NAME_free);
1585 return (ret);
1586}
1587
1588static int
1589ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1590{
1591 return (X509_NAME_cmp(*a, *b));
1592}
1593
1594int
1595ssl3_get_new_session_ticket(SSL *s)
1596{
1597 uint32_t lifetime_hint;
1598 CBS cbs, session_ticket;
1599 int al, ret;
1600
1601 if ((ret = ssl3_get_message(s, SSL3_ST_CR_SESSION_TICKET_A,
1602 SSL3_ST_CR_SESSION_TICKET_B, -1, 16384)) <= 0)
1603 return ret;
1604
1605 if (s->s3->hs.tls12.message_type == SSL3_MT_FINISHED) {
1606 s->s3->hs.tls12.reuse_message = 1;
1607 return (1);
1608 }
1609 if (s->s3->hs.tls12.message_type != SSL3_MT_NEWSESSION_TICKET) {
1610 al = SSL_AD_UNEXPECTED_MESSAGE;
1611 SSLerror(s, SSL_R_BAD_MESSAGE_TYPE);
1612 goto fatal_err;
1613 }
1614
1615 if (s->internal->init_num < 0) {
1616 al = SSL_AD_DECODE_ERROR;
1617 SSLerror(s, SSL_R_LENGTH_MISMATCH);
1618 goto fatal_err;
1619 }
1620
1621 CBS_init(&cbs, s->internal->init_msg, s->internal->init_num);
1622 if (!CBS_get_u32(&cbs, &lifetime_hint) ||
1623 !CBS_get_u16_length_prefixed(&cbs, &session_ticket) ||
1624 CBS_len(&cbs) != 0) {
1625 al = SSL_AD_DECODE_ERROR;
1626 SSLerror(s, SSL_R_LENGTH_MISMATCH);
1627 goto fatal_err;
1628 }
1629 s->session->tlsext_tick_lifetime_hint = lifetime_hint;
1630
1631 if (!CBS_stow(&session_ticket, &s->session->tlsext_tick,
1632 &s->session->tlsext_ticklen)) {
1633 SSLerror(s, ERR_R_MALLOC_FAILURE);
1634 goto err;
1635 }
1636
1637 /*
1638 * There are two ways to detect a resumed ticket sesion.
1639 * One is to set an appropriate session ID and then the server
1640 * must return a match in ServerHello. This allows the normal
1641 * client session ID matching to work and we know much
1642 * earlier that the ticket has been accepted.
1643 *
1644 * The other way is to set zero length session ID when the
1645 * ticket is presented and rely on the handshake to determine
1646 * session resumption.
1647 *
1648 * We choose the former approach because this fits in with
1649 * assumptions elsewhere in OpenSSL. The session ID is set
1650 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
1651 * ticket.
1652 */
1653 EVP_Digest(CBS_data(&session_ticket), CBS_len(&session_ticket),
1654 s->session->session_id, &s->session->session_id_length,
1655 EVP_sha256(), NULL);
1656
1657 return (1);
1658
1659 fatal_err:
1660 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1661 err:
1662 return (-1);
1663}
1664
1665int
1666ssl3_get_cert_status(SSL *s)
1667{
1668 CBS cert_status, response;
1669 uint8_t status_type;
1670 int al, ret;
1671
1672 if ((ret = ssl3_get_message(s, SSL3_ST_CR_CERT_STATUS_A,
1673 SSL3_ST_CR_CERT_STATUS_B, -1, 16384)) <= 0)
1674 return ret;
1675
1676 if (s->s3->hs.tls12.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) {
1677 /*
1678 * Tell the callback the server did not send us an OSCP
1679 * response, and has decided to head directly to key exchange.
1680 */
1681 if (s->ctx->internal->tlsext_status_cb) {
1682 free(s->internal->tlsext_ocsp_resp);
1683 s->internal->tlsext_ocsp_resp = NULL;
1684 s->internal->tlsext_ocsp_resp_len = 0;
1685
1686 ret = s->ctx->internal->tlsext_status_cb(s,
1687 s->ctx->internal->tlsext_status_arg);
1688 if (ret == 0) {
1689 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
1690 SSLerror(s, SSL_R_INVALID_STATUS_RESPONSE);
1691 goto fatal_err;
1692 }
1693 if (ret < 0) {
1694 al = SSL_AD_INTERNAL_ERROR;
1695 SSLerror(s, ERR_R_MALLOC_FAILURE);
1696 goto fatal_err;
1697 }
1698 }
1699 s->s3->hs.tls12.reuse_message = 1;
1700 return (1);
1701 }
1702
1703 if (s->s3->hs.tls12.message_type != SSL3_MT_CERTIFICATE &&
1704 s->s3->hs.tls12.message_type != SSL3_MT_CERTIFICATE_STATUS) {
1705 al = SSL_AD_UNEXPECTED_MESSAGE;
1706 SSLerror(s, SSL_R_BAD_MESSAGE_TYPE);
1707 goto fatal_err;
1708 }
1709
1710 if (s->internal->init_num < 0) {
1711 /* need at least status type + length */
1712 al = SSL_AD_DECODE_ERROR;
1713 SSLerror(s, SSL_R_LENGTH_MISMATCH);
1714 goto fatal_err;
1715 }
1716
1717 CBS_init(&cert_status, s->internal->init_msg, s->internal->init_num);
1718 if (!CBS_get_u8(&cert_status, &status_type) ||
1719 CBS_len(&cert_status) < 3) {
1720 /* need at least status type + length */
1721 al = SSL_AD_DECODE_ERROR;
1722 SSLerror(s, SSL_R_LENGTH_MISMATCH);
1723 goto fatal_err;
1724 }
1725
1726 if (status_type != TLSEXT_STATUSTYPE_ocsp) {
1727 al = SSL_AD_DECODE_ERROR;
1728 SSLerror(s, SSL_R_UNSUPPORTED_STATUS_TYPE);
1729 goto fatal_err;
1730 }
1731
1732 if (!CBS_get_u24_length_prefixed(&cert_status, &response) ||
1733 CBS_len(&cert_status) != 0) {
1734 al = SSL_AD_DECODE_ERROR;
1735 SSLerror(s, SSL_R_LENGTH_MISMATCH);
1736 goto fatal_err;
1737 }
1738
1739 if (!CBS_stow(&response, &s->internal->tlsext_ocsp_resp,
1740 &s->internal->tlsext_ocsp_resp_len)) {
1741 al = SSL_AD_INTERNAL_ERROR;
1742 SSLerror(s, ERR_R_MALLOC_FAILURE);
1743 goto fatal_err;
1744 }
1745
1746 if (s->ctx->internal->tlsext_status_cb) {
1747 int ret;
1748 ret = s->ctx->internal->tlsext_status_cb(s,
1749 s->ctx->internal->tlsext_status_arg);
1750 if (ret == 0) {
1751 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
1752 SSLerror(s, SSL_R_INVALID_STATUS_RESPONSE);
1753 goto fatal_err;
1754 }
1755 if (ret < 0) {
1756 al = SSL_AD_INTERNAL_ERROR;
1757 SSLerror(s, ERR_R_MALLOC_FAILURE);
1758 goto fatal_err;
1759 }
1760 }
1761 return (1);
1762 fatal_err:
1763 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1764 return (-1);
1765}
1766
1767int
1768ssl3_get_server_done(SSL *s)
1769{
1770 int ret;
1771
1772 if ((ret = ssl3_get_message(s, SSL3_ST_CR_SRVR_DONE_A,
1773 SSL3_ST_CR_SRVR_DONE_B, SSL3_MT_SERVER_DONE,
1774 30 /* should be very small, like 0 :-) */)) <= 0)
1775 return ret;
1776
1777 if (s->internal->init_num != 0) {
1778 /* should contain no data */
1779 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1780 SSLerror(s, SSL_R_LENGTH_MISMATCH);
1781 return -1;
1782 }
1783
1784 return 1;
1785}
1786
1787static int
1788ssl3_send_client_kex_rsa(SSL *s, CBB *cbb)
1789{
1790 unsigned char pms[SSL_MAX_MASTER_KEY_LENGTH];
1791 unsigned char *enc_pms = NULL;
1792 uint16_t max_legacy_version;
1793 EVP_PKEY *pkey;
1794 RSA *rsa;
1795 int ret = 0;
1796 int enc_len;
1797 CBB epms;
1798
1799 /*
1800 * RSA-Encrypted Premaster Secret Message - RFC 5246 section 7.4.7.1.
1801 */
1802
1803 pkey = X509_get0_pubkey(s->session->peer_cert);
1804 if (pkey == NULL || (rsa = EVP_PKEY_get0_RSA(pkey)) == NULL) {
1805 SSLerror(s, ERR_R_INTERNAL_ERROR);
1806 goto err;
1807 }
1808
1809 /*
1810 * Our maximum legacy protocol version - while RFC 5246 section 7.4.7.1
1811 * says "The latest (newest) version supported by the client", if we're
1812 * doing RSA key exchange then we have to presume that we're talking to
1813 * a server that does not understand the supported versions extension
1814 * and therefore our maximum version is that sent in the ClientHello.
1815 */
1816 if (!ssl_max_legacy_version(s, &max_legacy_version))
1817 goto err;
1818 pms[0] = max_legacy_version >> 8;
1819 pms[1] = max_legacy_version & 0xff;
1820 arc4random_buf(&pms[2], sizeof(pms) - 2);
1821
1822 if ((enc_pms = malloc(RSA_size(rsa))) == NULL) {
1823 SSLerror(s, ERR_R_MALLOC_FAILURE);
1824 goto err;
1825 }
1826
1827 enc_len = RSA_public_encrypt(sizeof(pms), pms, enc_pms, rsa,
1828 RSA_PKCS1_PADDING);
1829 if (enc_len <= 0) {
1830 SSLerror(s, SSL_R_BAD_RSA_ENCRYPT);
1831 goto err;
1832 }
1833
1834 if (!CBB_add_u16_length_prefixed(cbb, &epms))
1835 goto err;
1836 if (!CBB_add_bytes(&epms, enc_pms, enc_len))
1837 goto err;
1838 if (!CBB_flush(cbb))
1839 goto err;
1840
1841 if (!tls12_derive_master_secret(s, pms, sizeof(pms)))
1842 goto err;
1843
1844 ret = 1;
1845
1846 err:
1847 explicit_bzero(pms, sizeof(pms));
1848 free(enc_pms);
1849
1850 return ret;
1851}
1852
1853static int
1854ssl3_send_client_kex_dhe(SSL *s, CBB *cbb)
1855{
1856 uint8_t *key = NULL;
1857 size_t key_len = 0;
1858 int ret = 0;
1859
1860 /* Ensure that we have an ephemeral key from the server for DHE. */
1861 if (s->s3->hs.key_share == NULL) {
1862 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
1863 SSLerror(s, SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1864 goto err;
1865 }
1866
1867 if (!tls_key_share_generate(s->s3->hs.key_share))
1868 goto err;
1869 if (!tls_key_share_public(s->s3->hs.key_share, cbb))
1870 goto err;
1871 if (!tls_key_share_derive(s->s3->hs.key_share, &key, &key_len))
1872 goto err;
1873
1874 if (!tls12_derive_master_secret(s, key, key_len))
1875 goto err;
1876
1877 ret = 1;
1878
1879 err:
1880 freezero(key, key_len);
1881
1882 return ret;
1883}
1884
1885static int
1886ssl3_send_client_kex_ecdhe(SSL *s, CBB *cbb)
1887{
1888 uint8_t *key = NULL;
1889 size_t key_len = 0;
1890 CBB public;
1891 int ret = 0;
1892
1893 /* Ensure that we have an ephemeral key for ECDHE. */
1894 if (s->s3->hs.key_share == NULL) {
1895 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
1896 SSLerror(s, ERR_R_INTERNAL_ERROR);
1897 goto err;
1898 }
1899
1900 if (!tls_key_share_generate(s->s3->hs.key_share))
1901 goto err;
1902
1903 if (!CBB_add_u8_length_prefixed(cbb, &public))
1904 return 0;
1905 if (!tls_key_share_public(s->s3->hs.key_share, &public))
1906 goto err;
1907 if (!CBB_flush(cbb))
1908 goto err;
1909
1910 if (!tls_key_share_derive(s->s3->hs.key_share, &key, &key_len))
1911 goto err;
1912
1913 if (!tls12_derive_master_secret(s, key, key_len))
1914 goto err;
1915
1916 ret = 1;
1917
1918 err:
1919 freezero(key, key_len);
1920
1921 return ret;
1922}
1923
1924static int
1925ssl3_send_client_kex_gost(SSL *s, CBB *cbb)
1926{
1927 unsigned char premaster_secret[32], shared_ukm[32], tmp[256];
1928 EVP_PKEY_CTX *pkey_ctx = NULL;
1929 EVP_MD_CTX *ukm_hash = NULL;
1930 EVP_PKEY *pkey;
1931 size_t msglen;
1932 unsigned int md_len;
1933 CBB gostblob;
1934 int nid;
1935 int ret = 0;
1936
1937 /* Get server sertificate PKEY and create ctx from it */
1938 pkey = X509_get0_pubkey(s->session->peer_cert);
1939 if (pkey == NULL || s->session->peer_cert_type != SSL_PKEY_GOST01) {
1940 SSLerror(s, SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
1941 goto err;
1942 }
1943 if ((pkey_ctx = EVP_PKEY_CTX_new(pkey, NULL)) == NULL) {
1944 SSLerror(s, ERR_R_MALLOC_FAILURE);
1945 goto err;
1946 }
1947
1948 /*
1949 * If we have send a certificate, and certificate key parameters match
1950 * those of server certificate, use certificate key for key exchange.
1951 * Otherwise, generate ephemeral key pair.
1952 */
1953 if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0)
1954 goto err;
1955
1956 /* Generate session key. */
1957 arc4random_buf(premaster_secret, sizeof(premaster_secret));
1958
1959 /*
1960 * If we have client certificate, use its secret as peer key.
1961 * XXX - this presumably lacks PFS.
1962 */
1963 if (s->s3->hs.tls12.cert_request != 0 &&
1964 s->cert->key->privatekey != NULL) {
1965 if (EVP_PKEY_derive_set_peer(pkey_ctx,
1966 s->cert->key->privatekey) <=0) {
1967 /*
1968 * If there was an error - just ignore it.
1969 * Ephemeral key would be used.
1970 */
1971 ERR_clear_error();
1972 }
1973 }
1974
1975 /*
1976 * Compute shared IV and store it in algorithm-specific context data.
1977 */
1978 if ((ukm_hash = EVP_MD_CTX_new()) == NULL) {
1979 SSLerror(s, ERR_R_MALLOC_FAILURE);
1980 goto err;
1981 }
1982
1983 /* XXX check handshake hash instead. */
1984 if (s->s3->hs.cipher->algorithm2 & SSL_HANDSHAKE_MAC_GOST94)
1985 nid = NID_id_GostR3411_94;
1986 else
1987 nid = NID_id_tc26_gost3411_2012_256;
1988 if (!EVP_DigestInit(ukm_hash, EVP_get_digestbynid(nid)))
1989 goto err;
1990 if (!EVP_DigestUpdate(ukm_hash, s->s3->client_random, SSL3_RANDOM_SIZE))
1991 goto err;
1992 if (!EVP_DigestUpdate(ukm_hash, s->s3->server_random, SSL3_RANDOM_SIZE))
1993 goto err;
1994 if (!EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len))
1995 goto err;
1996 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT,
1997 EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) {
1998 SSLerror(s, SSL_R_LIBRARY_BUG);
1999 goto err;
2000 }
2001
2002 /*
2003 * Make GOST keytransport blob message, encapsulate it into sequence.
2004 */
2005 msglen = 255;
2006 if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, premaster_secret,
2007 sizeof(premaster_secret)) < 0) {
2008 SSLerror(s, SSL_R_LIBRARY_BUG);
2009 goto err;
2010 }
2011
2012 if (!CBB_add_asn1(cbb, &gostblob, CBS_ASN1_SEQUENCE))
2013 goto err;
2014 if (!CBB_add_bytes(&gostblob, tmp, msglen))
2015 goto err;
2016 if (!CBB_flush(cbb))
2017 goto err;
2018
2019 /* Check if pubkey from client certificate was used. */
2020 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2,
2021 NULL) > 0)
2022 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2023
2024 if (!tls12_derive_master_secret(s, premaster_secret, 32))
2025 goto err;
2026
2027 ret = 1;
2028
2029 err:
2030 explicit_bzero(premaster_secret, sizeof(premaster_secret));
2031 EVP_PKEY_CTX_free(pkey_ctx);
2032 EVP_MD_CTX_free(ukm_hash);
2033
2034 return ret;
2035}
2036
2037int
2038ssl3_send_client_key_exchange(SSL *s)
2039{
2040 unsigned long alg_k;
2041 CBB cbb, kex;
2042
2043 memset(&cbb, 0, sizeof(cbb));
2044
2045 if (s->s3->hs.state == SSL3_ST_CW_KEY_EXCH_A) {
2046 alg_k = s->s3->hs.cipher->algorithm_mkey;
2047
2048 if (!ssl3_handshake_msg_start(s, &cbb, &kex,
2049 SSL3_MT_CLIENT_KEY_EXCHANGE))
2050 goto err;
2051
2052 if (alg_k & SSL_kRSA) {
2053 if (!ssl3_send_client_kex_rsa(s, &kex))
2054 goto err;
2055 } else if (alg_k & SSL_kDHE) {
2056 if (!ssl3_send_client_kex_dhe(s, &kex))
2057 goto err;
2058 } else if (alg_k & SSL_kECDHE) {
2059 if (!ssl3_send_client_kex_ecdhe(s, &kex))
2060 goto err;
2061 } else if (alg_k & SSL_kGOST) {
2062 if (!ssl3_send_client_kex_gost(s, &kex))
2063 goto err;
2064 } else {
2065 ssl3_send_alert(s, SSL3_AL_FATAL,
2066 SSL_AD_HANDSHAKE_FAILURE);
2067 SSLerror(s, ERR_R_INTERNAL_ERROR);
2068 goto err;
2069 }
2070
2071 if (!ssl3_handshake_msg_finish(s, &cbb))
2072 goto err;
2073
2074 s->s3->hs.state = SSL3_ST_CW_KEY_EXCH_B;
2075 }
2076
2077 /* SSL3_ST_CW_KEY_EXCH_B */
2078 return (ssl3_handshake_write(s));
2079
2080 err:
2081 CBB_cleanup(&cbb);
2082
2083 return (-1);
2084}
2085
2086static int
2087ssl3_send_client_verify_sigalgs(SSL *s, EVP_PKEY *pkey,
2088 const struct ssl_sigalg *sigalg, CBB *cert_verify)
2089{
2090 CBB cbb_signature;
2091 EVP_PKEY_CTX *pctx = NULL;
2092 EVP_MD_CTX *mctx = NULL;
2093 const unsigned char *hdata;
2094 unsigned char *signature = NULL;
2095 size_t signature_len, hdata_len;
2096 int ret = 0;
2097
2098 if ((mctx = EVP_MD_CTX_new()) == NULL)
2099 goto err;
2100
2101 if (!tls1_transcript_data(s, &hdata, &hdata_len)) {
2102 SSLerror(s, ERR_R_INTERNAL_ERROR);
2103 goto err;
2104 }
2105 if (!EVP_DigestSignInit(mctx, &pctx, sigalg->md(), NULL, pkey)) {
2106 SSLerror(s, ERR_R_EVP_LIB);
2107 goto err;
2108 }
2109 if (sigalg->key_type == EVP_PKEY_GOSTR01 &&
2110 EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
2111 EVP_PKEY_CTRL_GOST_SIG_FORMAT, GOST_SIG_FORMAT_RS_LE, NULL) <= 0) {
2112 SSLerror(s, ERR_R_EVP_LIB);
2113 goto err;
2114 }
2115 if ((sigalg->flags & SIGALG_FLAG_RSA_PSS) &&
2116 (!EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) ||
2117 !EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, -1))) {
2118 SSLerror(s, ERR_R_EVP_LIB);
2119 goto err;
2120 }
2121 if (!EVP_DigestSignUpdate(mctx, hdata, hdata_len)) {
2122 SSLerror(s, ERR_R_EVP_LIB);
2123 goto err;
2124 }
2125 if (!EVP_DigestSignFinal(mctx, NULL, &signature_len) ||
2126 signature_len == 0) {
2127 SSLerror(s, ERR_R_EVP_LIB);
2128 goto err;
2129 }
2130 if ((signature = calloc(1, signature_len)) == NULL) {
2131 SSLerror(s, ERR_R_MALLOC_FAILURE);
2132 goto err;
2133 }
2134 if (!EVP_DigestSignFinal(mctx, signature, &signature_len)) {
2135 SSLerror(s, ERR_R_EVP_LIB);
2136 goto err;
2137 }
2138
2139 if (!CBB_add_u16(cert_verify, sigalg->value))
2140 goto err;
2141 if (!CBB_add_u16_length_prefixed(cert_verify, &cbb_signature))
2142 goto err;
2143 if (!CBB_add_bytes(&cbb_signature, signature, signature_len))
2144 goto err;
2145 if (!CBB_flush(cert_verify))
2146 goto err;
2147
2148 ret = 1;
2149
2150 err:
2151 EVP_MD_CTX_free(mctx);
2152 free(signature);
2153 return ret;
2154}
2155
2156static int
2157ssl3_send_client_verify_rsa(SSL *s, EVP_PKEY *pkey, CBB *cert_verify)
2158{
2159 CBB cbb_signature;
2160 RSA *rsa;
2161 unsigned char data[EVP_MAX_MD_SIZE];
2162 unsigned char *signature = NULL;
2163 unsigned int signature_len;
2164 size_t data_len;
2165 int ret = 0;
2166
2167 if (!tls1_transcript_hash_value(s, data, sizeof(data), &data_len))
2168 goto err;
2169 if ((signature = calloc(1, EVP_PKEY_size(pkey))) == NULL)
2170 goto err;
2171 if ((rsa = EVP_PKEY_get0_RSA(pkey)) == NULL)
2172 goto err;
2173 if (RSA_sign(NID_md5_sha1, data, data_len, signature, &signature_len,
2174 rsa) <= 0 ) {
2175 SSLerror(s, ERR_R_RSA_LIB);
2176 goto err;
2177 }
2178
2179 if (!CBB_add_u16_length_prefixed(cert_verify, &cbb_signature))
2180 goto err;
2181 if (!CBB_add_bytes(&cbb_signature, signature, signature_len))
2182 goto err;
2183 if (!CBB_flush(cert_verify))
2184 goto err;
2185
2186 ret = 1;
2187 err:
2188 free(signature);
2189 return ret;
2190}
2191
2192static int
2193ssl3_send_client_verify_ec(SSL *s, EVP_PKEY *pkey, CBB *cert_verify)
2194{
2195 CBB cbb_signature;
2196 EC_KEY *eckey;
2197 unsigned char data[EVP_MAX_MD_SIZE];
2198 unsigned char *signature = NULL;
2199 unsigned int signature_len;
2200 int ret = 0;
2201
2202 if (!tls1_transcript_hash_value(s, data, sizeof(data), NULL))
2203 goto err;
2204 if ((signature = calloc(1, EVP_PKEY_size(pkey))) == NULL)
2205 goto err;
2206 if ((eckey = EVP_PKEY_get0_EC_KEY(pkey)) == NULL)
2207 goto err;
2208 if (!ECDSA_sign(0, &data[MD5_DIGEST_LENGTH], SHA_DIGEST_LENGTH,
2209 signature, &signature_len, eckey)) {
2210 SSLerror(s, ERR_R_ECDSA_LIB);
2211 goto err;
2212 }
2213
2214 if (!CBB_add_u16_length_prefixed(cert_verify, &cbb_signature))
2215 goto err;
2216 if (!CBB_add_bytes(&cbb_signature, signature, signature_len))
2217 goto err;
2218 if (!CBB_flush(cert_verify))
2219 goto err;
2220
2221 ret = 1;
2222 err:
2223 free(signature);
2224 return ret;
2225}
2226
2227#ifndef OPENSSL_NO_GOST
2228static int
2229ssl3_send_client_verify_gost(SSL *s, EVP_PKEY *pkey, CBB *cert_verify)
2230{
2231 CBB cbb_signature;
2232 EVP_MD_CTX *mctx;
2233 EVP_PKEY_CTX *pctx;
2234 const EVP_MD *md;
2235 const unsigned char *hdata;
2236 unsigned char *signature = NULL;
2237 size_t signature_len;
2238 size_t hdata_len;
2239 int nid;
2240 int ret = 0;
2241
2242 if ((mctx = EVP_MD_CTX_new()) == NULL)
2243 goto err;
2244
2245 if (!tls1_transcript_data(s, &hdata, &hdata_len)) {
2246 SSLerror(s, ERR_R_INTERNAL_ERROR);
2247 goto err;
2248 }
2249 if (!EVP_PKEY_get_default_digest_nid(pkey, &nid) ||
2250 (md = EVP_get_digestbynid(nid)) == NULL) {
2251 SSLerror(s, ERR_R_EVP_LIB);
2252 goto err;
2253 }
2254 if (!EVP_DigestSignInit(mctx, &pctx, md, NULL, pkey)) {
2255 SSLerror(s, ERR_R_EVP_LIB);
2256 goto err;
2257 }
2258 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
2259 EVP_PKEY_CTRL_GOST_SIG_FORMAT, GOST_SIG_FORMAT_RS_LE, NULL) <= 0) {
2260 SSLerror(s, ERR_R_EVP_LIB);
2261 goto err;
2262 }
2263 if (!EVP_DigestSignUpdate(mctx, hdata, hdata_len)) {
2264 SSLerror(s, ERR_R_EVP_LIB);
2265 goto err;
2266 }
2267 if (!EVP_DigestSignFinal(mctx, NULL, &signature_len) ||
2268 signature_len == 0) {
2269 SSLerror(s, ERR_R_EVP_LIB);
2270 goto err;
2271 }
2272 if ((signature = calloc(1, signature_len)) == NULL) {
2273 SSLerror(s, ERR_R_MALLOC_FAILURE);
2274 goto err;
2275 }
2276 if (!EVP_DigestSignFinal(mctx, signature, &signature_len)) {
2277 SSLerror(s, ERR_R_EVP_LIB);
2278 goto err;
2279 }
2280
2281 if (!CBB_add_u16_length_prefixed(cert_verify, &cbb_signature))
2282 goto err;
2283 if (!CBB_add_bytes(&cbb_signature, signature, signature_len))
2284 goto err;
2285 if (!CBB_flush(cert_verify))
2286 goto err;
2287
2288 ret = 1;
2289 err:
2290 EVP_MD_CTX_free(mctx);
2291 free(signature);
2292 return ret;
2293}
2294#endif
2295
2296int
2297ssl3_send_client_verify(SSL *s)
2298{
2299 const struct ssl_sigalg *sigalg;
2300 CBB cbb, cert_verify;
2301 EVP_PKEY *pkey;
2302
2303 memset(&cbb, 0, sizeof(cbb));
2304
2305 if (s->s3->hs.state == SSL3_ST_CW_CERT_VRFY_A) {
2306 if (!ssl3_handshake_msg_start(s, &cbb, &cert_verify,
2307 SSL3_MT_CERTIFICATE_VERIFY))
2308 goto err;
2309
2310 pkey = s->cert->key->privatekey;
2311 if ((sigalg = ssl_sigalg_select(s, pkey)) == NULL) {
2312 SSLerror(s, SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2313 goto err;
2314 }
2315 s->s3->hs.our_sigalg = sigalg;
2316
2317 /*
2318 * For TLS v1.2 send signature algorithm and signature using
2319 * agreed digest and cached handshake records.
2320 */
2321 if (SSL_USE_SIGALGS(s)) {
2322 if (!ssl3_send_client_verify_sigalgs(s, pkey, sigalg,
2323 &cert_verify))
2324 goto err;
2325 } else if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) {
2326 if (!ssl3_send_client_verify_rsa(s, pkey, &cert_verify))
2327 goto err;
2328 } else if (EVP_PKEY_id(pkey) == EVP_PKEY_EC) {
2329 if (!ssl3_send_client_verify_ec(s, pkey, &cert_verify))
2330 goto err;
2331#ifndef OPENSSL_NO_GOST
2332 } else if (EVP_PKEY_id(pkey) == NID_id_GostR3410_94 ||
2333 EVP_PKEY_id(pkey) == NID_id_GostR3410_2001) {
2334 if (!ssl3_send_client_verify_gost(s, pkey, &cert_verify))
2335 goto err;
2336#endif
2337 } else {
2338 SSLerror(s, ERR_R_INTERNAL_ERROR);
2339 goto err;
2340 }
2341
2342 tls1_transcript_free(s);
2343
2344 if (!ssl3_handshake_msg_finish(s, &cbb))
2345 goto err;
2346
2347 s->s3->hs.state = SSL3_ST_CW_CERT_VRFY_B;
2348 }
2349
2350 return (ssl3_handshake_write(s));
2351
2352 err:
2353 CBB_cleanup(&cbb);
2354
2355 return (-1);
2356}
2357
2358int
2359ssl3_send_client_certificate(SSL *s)
2360{
2361 EVP_PKEY *pkey = NULL;
2362 X509 *x509 = NULL;
2363 CBB cbb, client_cert;
2364 int i;
2365
2366 memset(&cbb, 0, sizeof(cbb));
2367
2368 if (s->s3->hs.state == SSL3_ST_CW_CERT_A) {
2369 if (s->cert->key->x509 == NULL ||
2370 s->cert->key->privatekey == NULL)
2371 s->s3->hs.state = SSL3_ST_CW_CERT_B;
2372 else
2373 s->s3->hs.state = SSL3_ST_CW_CERT_C;
2374 }
2375
2376 /* We need to get a client cert */
2377 if (s->s3->hs.state == SSL3_ST_CW_CERT_B) {
2378 /*
2379 * If we get an error, we need to
2380 * ssl->internal->rwstate = SSL_X509_LOOKUP; return(-1);
2381 * We then get retried later.
2382 */
2383 i = ssl_do_client_cert_cb(s, &x509, &pkey);
2384 if (i < 0) {
2385 s->internal->rwstate = SSL_X509_LOOKUP;
2386 return (-1);
2387 }
2388 s->internal->rwstate = SSL_NOTHING;
2389 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) {
2390 s->s3->hs.state = SSL3_ST_CW_CERT_B;
2391 if (!SSL_use_certificate(s, x509) ||
2392 !SSL_use_PrivateKey(s, pkey))
2393 i = 0;
2394 } else if (i == 1) {
2395 i = 0;
2396 SSLerror(s, SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
2397 }
2398
2399 X509_free(x509);
2400 EVP_PKEY_free(pkey);
2401 if (i == 0) {
2402 s->s3->hs.tls12.cert_request = 2;
2403
2404 /* There is no client certificate to verify. */
2405 tls1_transcript_free(s);
2406 }
2407
2408 /* Ok, we have a cert */
2409 s->s3->hs.state = SSL3_ST_CW_CERT_C;
2410 }
2411
2412 if (s->s3->hs.state == SSL3_ST_CW_CERT_C) {
2413 if (!ssl3_handshake_msg_start(s, &cbb, &client_cert,
2414 SSL3_MT_CERTIFICATE))
2415 goto err;
2416 if (!ssl3_output_cert_chain(s, &client_cert,
2417 (s->s3->hs.tls12.cert_request == 2) ? NULL : s->cert->key))
2418 goto err;
2419 if (!ssl3_handshake_msg_finish(s, &cbb))
2420 goto err;
2421
2422 s->s3->hs.state = SSL3_ST_CW_CERT_D;
2423 }
2424
2425 /* SSL3_ST_CW_CERT_D */
2426 return (ssl3_handshake_write(s));
2427
2428 err:
2429 CBB_cleanup(&cbb);
2430
2431 return (0);
2432}
2433
2434#define has_bits(i,m) (((i)&(m)) == (m))
2435
2436int
2437ssl3_check_cert_and_algorithm(SSL *s)
2438{
2439 long alg_k, alg_a;
2440 int nid = NID_undef;
2441 int i;
2442
2443 alg_k = s->s3->hs.cipher->algorithm_mkey;
2444 alg_a = s->s3->hs.cipher->algorithm_auth;
2445
2446 /* We don't have a certificate. */
2447 if (alg_a & SSL_aNULL)
2448 return (1);
2449
2450 if (s->s3->hs.key_share != NULL)
2451 nid = tls_key_share_nid(s->s3->hs.key_share);
2452
2453 /* This is the passed certificate. */
2454
2455 if (s->session->peer_cert_type == SSL_PKEY_ECC) {
2456 if (!ssl_check_srvr_ecc_cert_and_alg(s, s->session->peer_cert)) {
2457 SSLerror(s, SSL_R_BAD_ECC_CERT);
2458 goto fatal_err;
2459 }
2460 return (1);
2461 }
2462
2463 i = X509_certificate_type(s->session->peer_cert, NULL);
2464
2465 /* Check that we have a certificate if we require one. */
2466 if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA|EVP_PKT_SIGN)) {
2467 SSLerror(s, SSL_R_MISSING_RSA_SIGNING_CERT);
2468 goto fatal_err;
2469 }
2470 if ((alg_k & SSL_kRSA) && !has_bits(i, EVP_PK_RSA|EVP_PKT_ENC)) {
2471 SSLerror(s, SSL_R_MISSING_RSA_ENCRYPTING_CERT);
2472 goto fatal_err;
2473 }
2474 if ((alg_k & SSL_kDHE) &&
2475 !(has_bits(i, EVP_PK_DH|EVP_PKT_EXCH) || (nid == NID_dhKeyAgreement))) {
2476 SSLerror(s, SSL_R_MISSING_DH_KEY);
2477 goto fatal_err;
2478 }
2479
2480 return (1);
2481
2482 fatal_err:
2483 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2484
2485 return (0);
2486}
2487
2488/*
2489 * Check to see if handshake is full or resumed. Usually this is just a
2490 * case of checking to see if a cache hit has occurred. In the case of
2491 * session tickets we have to check the next message to be sure.
2492 */
2493
2494int
2495ssl3_check_finished(SSL *s)
2496{
2497 int ret;
2498
2499 /* If we have no ticket it cannot be a resumed session. */
2500 if (!s->session->tlsext_tick)
2501 return (1);
2502 /* this function is called when we really expect a Certificate
2503 * message, so permit appropriate message length */
2504 if ((ret = ssl3_get_message(s, SSL3_ST_CR_CERT_A,
2505 SSL3_ST_CR_CERT_B, -1, s->internal->max_cert_list)) <= 0)
2506 return ret;
2507
2508 s->s3->hs.tls12.reuse_message = 1;
2509 if ((s->s3->hs.tls12.message_type == SSL3_MT_FINISHED) ||
2510 (s->s3->hs.tls12.message_type == SSL3_MT_NEWSESSION_TICKET))
2511 return (2);
2512
2513 return (1);
2514}
2515
2516int
2517ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
2518{
2519 int i = 0;
2520
2521#ifndef OPENSSL_NO_ENGINE
2522 if (s->ctx->internal->client_cert_engine) {
2523 i = ENGINE_load_ssl_client_cert(
2524 s->ctx->internal->client_cert_engine, s,
2525 SSL_get_client_CA_list(s), px509, ppkey, NULL, NULL, NULL);
2526 if (i != 0)
2527 return (i);
2528 }
2529#endif
2530 if (s->ctx->internal->client_cert_cb)
2531 i = s->ctx->internal->client_cert_cb(s, px509, ppkey);
2532 return (i);
2533}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2026-02-14 02:45:27 +0000