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[thirdparty/openssl.git] / ssl / s3_clnt.c
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d02b48c6 1/* ssl/s3_clnt.c */
58964a49 2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
d02b48c6
RE		 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.
10621efd 8 *
d02b48c6
RE		 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).
10621efd 15 *
d02b48c6
RE		 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.
10621efd 22 *
d02b48c6
RE		 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 :-).
10621efd 37 * 4. If you include any Windows specific code (or a derivative thereof) from
d02b48c6
RE		 38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
10621efd 40 *
d02b48c6
RE		 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.
10621efd 52 *
d02b48c6
RE		 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 */
8c74b5e5 58/* ====================================================================
52b8dad8 59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
8c74b5e5
BM		 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
10621efd 66 * notice, this list of conditions and the following disclaimer.
8c74b5e5
BM		 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 */
ea262260
BM		 111/* ====================================================================
112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113 *
10621efd 114 * Portions of the attached software ("Contribution") are developed by
ea262260
BM		 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 *
ea262260
BM		 120 * ECC cipher suite support in OpenSSL originally written by
121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
122 *
123 */
ddac1974
NL		 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 */
d02b48c6
RE		 150
151#include <stdio.h>
7b63c0fa
LJ		 152#include "ssl_locl.h"
153#include "kssl_lcl.h"
ec577822
BM		 154#include <openssl/buffer.h>
155#include <openssl/rand.h>
156#include <openssl/objects.h>
157#include <openssl/evp.h>
dbad1690 158#include <openssl/md5.h>
7043fa70 159#ifdef OPENSSL_FIPS
10621efd 160# include <openssl/fips.h>
7043fa70 161#endif
3eeaab4b 162#ifndef OPENSSL_NO_DH
10621efd 163# include <openssl/dh.h>
3eeaab4b 164#endif
d095b68d 165#include <openssl/bn.h>
368888bc 166#ifndef OPENSSL_NO_ENGINE
10621efd 167# include <openssl/engine.h>
368888bc 168#endif
f9b3bff6 169
10621efd 170static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b);
ea262260 171
821bee43 172#ifndef OPENSSL_NO_SSL3_METHOD
4ebb342f 173static const SSL_METHOD *ssl3_get_client_method(int ver)
10621efd
MC		 174{
175 if (ver == SSL3_VERSION)
176 return (SSLv3_client_method());
177 else
178 return (NULL);
179}
d02b48c6 180
f3b656b2 181IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
10621efd
MC		 182 ssl_undefined_function,
183 ssl3_connect, ssl3_get_client_method)
821bee43 184#endif
6b691a5c 185int ssl3_connect(SSL *s)
10621efd
MC		 186{
187 BUF_MEM *buf = NULL;
188 unsigned long Time = (unsigned long)time(NULL);
189 void (*cb) (const SSL *ssl, int type, int val) = NULL;
190 int ret = -1;
191 int new_state, state, skip = 0;
d02b48c6 192
10621efd
MC		 193 RAND_add(&Time, sizeof(Time), 0);
194 ERR_clear_error();
195 clear_sys_error();
196
197 if (s->info_callback != NULL)
198 cb = s->info_callback;
199 else if (s->ctx->info_callback != NULL)
200 cb = s->ctx->info_callback;
bd6941cf 201
10621efd
MC		 202 s->in_handshake++;
203 if (!SSL_in_init(s) || SSL_in_before(s))
204 SSL_clear(s);
205
206#ifndef OPENSSL_NO_HEARTBEATS
207 /*
208 * If we're awaiting a HeartbeatResponse, pretend we already got and
209 * don't await it anymore, because Heartbeats don't make sense during
210 * handshakes anyway.
211 */
212 if (s->tlsext_hb_pending) {
213 s->tlsext_hb_pending = 0;
214 s->tlsext_hb_seq++;
215 }
216#endif
217
218 for (;;) {
219 state = s->state;
220
221 switch (s->state) {
222 case SSL_ST_RENEGOTIATE:
223 s->renegotiate = 1;
224 s->state = SSL_ST_CONNECT;
225 s->ctx->stats.sess_connect_renegotiate++;
226 /* break */
227 case SSL_ST_BEFORE:
228 case SSL_ST_CONNECT:
229 case SSL_ST_BEFORE | SSL_ST_CONNECT:
230 case SSL_ST_OK | SSL_ST_CONNECT:
231
232 s->server = 0;
233 if (cb != NULL)
234 cb(s, SSL_CB_HANDSHAKE_START, 1);
235
236 if ((s->version & 0xff00) != 0x0300) {
237 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
238 ret = -1;
239 goto end;
240 }
241
242 /* s->version=SSL3_VERSION; */
243 s->type = SSL_ST_CONNECT;
244
245 if (s->init_buf == NULL) {
246 if ((buf = BUF_MEM_new()) == NULL) {
247 ret = -1;
248 goto end;
249 }
250 if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) {
251 ret = -1;
252 goto end;
253 }
254 s->init_buf = buf;
255 buf = NULL;
256 }
257
258 if (!ssl3_setup_buffers(s)) {
259 ret = -1;
260 goto end;
261 }
262
263 /* setup buffing BIO */
264 if (!ssl_init_wbio_buffer(s, 0)) {
265 ret = -1;
266 goto end;
267 }
268
269 /* don't push the buffering BIO quite yet */
270
271 ssl3_init_finished_mac(s);
272
273 s->state = SSL3_ST_CW_CLNT_HELLO_A;
274 s->ctx->stats.sess_connect++;
275 s->init_num = 0;
276 s->s3->flags &= ~SSL3_FLAGS_CCS_OK;
277 /*
278 * Should have been reset by ssl3_get_finished, too.
279 */
280 s->s3->change_cipher_spec = 0;
281 break;
282
283 case SSL3_ST_CW_CLNT_HELLO_A:
284 case SSL3_ST_CW_CLNT_HELLO_B:
285
286 s->shutdown = 0;
287 ret = ssl3_client_hello(s);
288 if (ret <= 0)
289 goto end;
290 s->state = SSL3_ST_CR_SRVR_HELLO_A;
291 s->init_num = 0;
292
293 /* turn on buffering for the next lot of output */
294 if (s->bbio != s->wbio)
295 s->wbio = BIO_push(s->bbio, s->wbio);
296
297 break;
298
299 case SSL3_ST_CR_SRVR_HELLO_A:
300 case SSL3_ST_CR_SRVR_HELLO_B:
301 ret = ssl3_get_server_hello(s);
302 if (ret <= 0)
303 goto end;
304
305 if (s->hit) {
306 s->state = SSL3_ST_CR_FINISHED_A;
3c3f0259 307#ifndef OPENSSL_NO_TLSEXT
10621efd
MC		 308 if (s->tlsext_ticket_expected) {
309 /* receive renewed session ticket */
310 s->state = SSL3_ST_CR_SESSION_TICKET_A;
311 }
312#endif
313 } else
314 s->state = SSL3_ST_CR_CERT_A;
315 s->init_num = 0;
316 break;
317
318 case SSL3_ST_CR_CERT_A:
319 case SSL3_ST_CR_CERT_B:
320 /* Check if it is anon DH/ECDH, SRP auth */
321 /* or PSK */
322 if (!
323 (s->s3->tmp.
324 new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP))
325&& !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) {
326 ret = ssl3_get_server_certificate(s);
327 if (ret <= 0)
328 goto end;
67c8e7f4 329#ifndef OPENSSL_NO_TLSEXT
10621efd
MC		 330 if (s->tlsext_status_expected)
331 s->state = SSL3_ST_CR_CERT_STATUS_A;
332 else
333 s->state = SSL3_ST_CR_KEY_EXCH_A;
334 } else {
335 skip = 1;
336 s->state = SSL3_ST_CR_KEY_EXCH_A;
337 }
67c8e7f4 338#else
10621efd
MC		 339 } else
340 skip = 1;
341
342 s->state = SSL3_ST_CR_KEY_EXCH_A;
343#endif
344 s->init_num = 0;
345 break;
346
347 case SSL3_ST_CR_KEY_EXCH_A:
348 case SSL3_ST_CR_KEY_EXCH_B:
349 ret = ssl3_get_key_exchange(s);
350 if (ret <= 0)
351 goto end;
352 s->state = SSL3_ST_CR_CERT_REQ_A;
353 s->init_num = 0;
354
355 /*
356 * at this point we check that we have the required stuff from
357 * the server
358 */
359 if (!ssl3_check_cert_and_algorithm(s)) {
360 ret = -1;
361 goto end;
362 }
363 break;
364
365 case SSL3_ST_CR_CERT_REQ_A:
366 case SSL3_ST_CR_CERT_REQ_B:
367 ret = ssl3_get_certificate_request(s);
368 if (ret <= 0)
369 goto end;
370 s->state = SSL3_ST_CR_SRVR_DONE_A;
371 s->init_num = 0;
372 break;
373
374 case SSL3_ST_CR_SRVR_DONE_A:
375 case SSL3_ST_CR_SRVR_DONE_B:
376 ret = ssl3_get_server_done(s);
377 if (ret <= 0)
378 goto end;
a149b246 379#ifndef OPENSSL_NO_SRP
10621efd
MC		 380 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
381 if ((ret = SRP_Calc_A_param(s)) <= 0) {
382 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_SRP_A_CALC);
383 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
384 goto end;
385 }
386 }
387#endif
388 if (s->s3->tmp.cert_req)
389 s->state = SSL3_ST_CW_CERT_A;
390 else
391 s->state = SSL3_ST_CW_KEY_EXCH_A;
392 s->init_num = 0;
393
394 break;
395
396 case SSL3_ST_CW_CERT_A:
397 case SSL3_ST_CW_CERT_B:
398 case SSL3_ST_CW_CERT_C:
399 case SSL3_ST_CW_CERT_D:
400 ret = ssl3_send_client_certificate(s);
401 if (ret <= 0)
402 goto end;
403 s->state = SSL3_ST_CW_KEY_EXCH_A;
404 s->init_num = 0;
405 break;
406
407 case SSL3_ST_CW_KEY_EXCH_A:
408 case SSL3_ST_CW_KEY_EXCH_B:
409 ret = ssl3_send_client_key_exchange(s);
410 if (ret <= 0)
411 goto end;
412 /*
413 * EAY EAY EAY need to check for DH fix cert sent back
414 */
415 /*
416 * For TLS, cert_req is set to 2, so a cert chain of nothing is
417 * sent, but no verify packet is sent
418 */
419 /*
420 * XXX: For now, we do not support client authentication in ECDH
421 * cipher suites with ECDH (rather than ECDSA) certificates. We
422 * need to skip the certificate verify message when client's
423 * ECDH public key is sent inside the client certificate.
424 */
425 if (s->s3->tmp.cert_req == 1) {
426 s->state = SSL3_ST_CW_CERT_VRFY_A;
427 } else {
428 s->state = SSL3_ST_CW_CHANGE_A;
429 }
430 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
431 s->state = SSL3_ST_CW_CHANGE_A;
432 }
433
434 s->init_num = 0;
435 break;
436
437 case SSL3_ST_CW_CERT_VRFY_A:
438 case SSL3_ST_CW_CERT_VRFY_B:
439 ret = ssl3_send_client_verify(s);
440 if (ret <= 0)
441 goto end;
442 s->state = SSL3_ST_CW_CHANGE_A;
443 s->init_num = 0;
444 break;
445
446 case SSL3_ST_CW_CHANGE_A:
447 case SSL3_ST_CW_CHANGE_B:
448 ret = ssl3_send_change_cipher_spec(s,
449 SSL3_ST_CW_CHANGE_A,
450 SSL3_ST_CW_CHANGE_B);
451 if (ret <= 0)
452 goto end;
68b33cc5 453
68b33cc5 454#if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
10621efd 455 s->state = SSL3_ST_CW_FINISHED_A;
68b33cc5 456#else
10621efd
MC		 457 if (s->s3->next_proto_neg_seen)
458 s->state = SSL3_ST_CW_NEXT_PROTO_A;
459 else
460 s->state = SSL3_ST_CW_FINISHED_A;
68b33cc5 461#endif
10621efd 462 s->init_num = 0;
d02b48c6 463
10621efd 464 s->session->cipher = s->s3->tmp.new_cipher;
09b6c2ef 465#ifdef OPENSSL_NO_COMP
10621efd 466 s->session->compress_meth = 0;
09b6c2ef 467#else
10621efd
MC		 468 if (s->s3->tmp.new_compression == NULL)
469 s->session->compress_meth = 0;
470 else
471 s->session->compress_meth = s->s3->tmp.new_compression->id;
09b6c2ef 472#endif
10621efd
MC		 473 if (!s->method->ssl3_enc->setup_key_block(s)) {
474 ret = -1;
475 goto end;
476 }
d02b48c6 477
10621efd
MC		 478 if (!s->method->ssl3_enc->change_cipher_state(s,
479 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
480 {
481 ret = -1;
482 goto end;
483 }
d02b48c6 484
10621efd 485 break;
d02b48c6 486
68b33cc5 487#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
10621efd
MC		 488 case SSL3_ST_CW_NEXT_PROTO_A:
489 case SSL3_ST_CW_NEXT_PROTO_B:
490 ret = ssl3_send_next_proto(s);
491 if (ret <= 0)
492 goto end;
493 s->state = SSL3_ST_CW_FINISHED_A;
494 break;
495#endif
496
497 case SSL3_ST_CW_FINISHED_A:
498 case SSL3_ST_CW_FINISHED_B:
499 ret = ssl3_send_finished(s,
500 SSL3_ST_CW_FINISHED_A,
501 SSL3_ST_CW_FINISHED_B,
502 s->method->
503 ssl3_enc->client_finished_label,
504 s->method->
505 ssl3_enc->client_finished_label_len);
506 if (ret <= 0)
507 goto end;
508 s->state = SSL3_ST_CW_FLUSH;
509
510 /* clear flags */
511 s->s3->flags &= ~SSL3_FLAGS_POP_BUFFER;
512 if (s->hit) {
513 s->s3->tmp.next_state = SSL_ST_OK;
514 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) {
515 s->state = SSL_ST_OK;
516 s->s3->flags |= SSL3_FLAGS_POP_BUFFER;
517 s->s3->delay_buf_pop_ret = 0;
518 }
519 } else {
6434abbf 520#ifndef OPENSSL_NO_TLSEXT
10621efd
MC		 521 /*
522 * Allow NewSessionTicket if ticket expected
523 */
524 if (s->tlsext_ticket_expected)
525 s->s3->tmp.next_state = SSL3_ST_CR_SESSION_TICKET_A;
526 else
6434abbf 527#endif
d02b48c6 528
10621efd
MC		 529 s->s3->tmp.next_state = SSL3_ST_CR_FINISHED_A;
530 }
531 s->init_num = 0;
532 break;
6434abbf 533
10621efd
MC		 534#ifndef OPENSSL_NO_TLSEXT
535 case SSL3_ST_CR_SESSION_TICKET_A:
536 case SSL3_ST_CR_SESSION_TICKET_B:
537 ret = ssl3_get_new_session_ticket(s);
538 if (ret <= 0)
539 goto end;
540 s->state = SSL3_ST_CR_FINISHED_A;
541 s->init_num = 0;
542 break;
543
544 case SSL3_ST_CR_CERT_STATUS_A:
545 case SSL3_ST_CR_CERT_STATUS_B:
546 ret = ssl3_get_cert_status(s);
547 if (ret <= 0)
548 goto end;
549 s->state = SSL3_ST_CR_KEY_EXCH_A;
550 s->init_num = 0;
551 break;
552#endif
553
554 case SSL3_ST_CR_FINISHED_A:
555 case SSL3_ST_CR_FINISHED_B:
556 s->s3->flags |= SSL3_FLAGS_CCS_OK;
557 ret = ssl3_get_finished(s, SSL3_ST_CR_FINISHED_A,
558 SSL3_ST_CR_FINISHED_B);
559 if (ret <= 0)
560 goto end;
561
562 if (s->hit)
563 s->state = SSL3_ST_CW_CHANGE_A;
564 else
565 s->state = SSL_ST_OK;
566 s->init_num = 0;
567 break;
568
569 case SSL3_ST_CW_FLUSH:
570 s->rwstate = SSL_WRITING;
571 if (BIO_flush(s->wbio) <= 0) {
572 ret = -1;
573 goto end;
574 }
575 s->rwstate = SSL_NOTHING;
576 s->state = s->s3->tmp.next_state;
577 break;
578
579 case SSL_ST_OK:
580 /* clean a few things up */
581 ssl3_cleanup_key_block(s);
582
583 if (s->init_buf != NULL) {
584 BUF_MEM_free(s->init_buf);
585 s->init_buf = NULL;
586 }
587
588 /*
589 * If we are not 'joining' the last two packets, remove the
590 * buffering now
591 */
592 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
593 ssl_free_wbio_buffer(s);
594 /* else do it later in ssl3_write */
595
596 s->init_num = 0;
597 s->renegotiate = 0;
598 s->new_session = 0;
599
600 ssl_update_cache(s, SSL_SESS_CACHE_CLIENT);
601 if (s->hit)
602 s->ctx->stats.sess_hit++;
603
604 ret = 1;
605 /* s->server=0; */
606 s->handshake_func = ssl3_connect;
607 s->ctx->stats.sess_connect_good++;
608
609 if (cb != NULL)
610 cb(s, SSL_CB_HANDSHAKE_DONE, 1);
611
612 goto end;
613 /* break; */
614
615 default:
616 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_UNKNOWN_STATE);
617 ret = -1;
618 goto end;
619 /* break; */
620 }
d02b48c6 621
10621efd
MC		 622 /* did we do anything */
623 if (!s->s3->tmp.reuse_message && !skip) {
624 if (s->debug) {
625 if ((ret = BIO_flush(s->wbio)) <= 0)
626 goto end;
627 }
628
629 if ((cb != NULL) && (s->state != state)) {
630 new_state = s->state;
631 s->state = state;
632 cb(s, SSL_CB_CONNECT_LOOP, 1);
633 s->state = new_state;
634 }
635 }
636 skip = 0;
637 }
638 end:
639 s->in_handshake--;
640 if (buf != NULL)
641 BUF_MEM_free(buf);
642 if (cb != NULL)
643 cb(s, SSL_CB_CONNECT_EXIT, ret);
644 return (ret);
645}
d02b48c6 646
36d16f8e 647int ssl3_client_hello(SSL *s)
10621efd
MC		 648{
649 unsigned char *buf;
650 unsigned char *p, *d;
651 int i;
652 unsigned long l;
09b6c2ef 653#ifndef OPENSSL_NO_COMP
10621efd
MC		 654 int j;
655 SSL_COMP *comp;
656#endif
657
658 buf = (unsigned char *)s->init_buf->data;
659 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) {
660 SSL_SESSION *sess = s->session;
661 if ((sess == NULL) ||
662 (sess->ssl_version != s->version) ||
663 !sess->session_id_length || (sess->not_resumable)) {
664 if (!ssl_get_new_session(s, 0))
665 goto err;
666 }
667 /* else use the pre-loaded session */
668
669 p = s->s3->client_random;
670
671 if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0)
672 goto err;
673
674 /* Do the message type and length last */
675 d = p = &(buf[4]);
676
cda8845d
MC		 677 /*-
678 * version indicates the negotiated version: for example from
679 * an SSLv2/v3 compatible client hello). The client_version
680 * field is the maximum version we permit and it is also
681 * used in RSA encrypted premaster secrets. Some servers can
682 * choke if we initially report a higher version then
683 * renegotiate to a lower one in the premaster secret. This
684 * didn't happen with TLS 1.0 as most servers supported it
685 * but it can with TLS 1.1 or later if the server only supports
686 * 1.0.
687 *
688 * Possible scenario with previous logic:
689 * 1. Client hello indicates TLS 1.2
690 * 2. Server hello says TLS 1.0
691 * 3. RSA encrypted premaster secret uses 1.2.
692 * 4. Handhaked proceeds using TLS 1.0.
693 * 5. Server sends hello request to renegotiate.
694 * 6. Client hello indicates TLS v1.0 as we now
695 * know that is maximum server supports.
696 * 7. Server chokes on RSA encrypted premaster secret
697 * containing version 1.0.
698 *
699 * For interoperability it should be OK to always use the
700 * maximum version we support in client hello and then rely
701 * on the checking of version to ensure the servers isn't
702 * being inconsistent: for example initially negotiating with
703 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
704 * client_version in client hello and not resetting it to
705 * the negotiated version.
706 */
fc6800d1 707#if 0
10621efd
MC		 708 *(p++) = s->version >> 8;
709 *(p++) = s->version & 0xff;
710 s->client_version = s->version;
fc6800d1 711#else
10621efd
MC		 712 *(p++) = s->client_version >> 8;
713 *(p++) = s->client_version & 0xff;
714#endif
715
716 /* Random stuff */
717 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
718 p += SSL3_RANDOM_SIZE;
719
720 /* Session ID */
721 if (s->new_session)
722 i = 0;
723 else
724 i = s->session->session_id_length;
725 *(p++) = i;
726 if (i != 0) {
727 if (i > (int)sizeof(s->session->session_id)) {
728 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
729 goto err;
730 }
731 memcpy(p, s->session->session_id, i);
732 p += i;
733 }
d02b48c6 734
10621efd
MC		 735 /* Ciphers supported */
736 i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]), 0);
737 if (i == 0) {
738 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE);
739 goto err;
740 }
89bd25eb 741#ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
10621efd
MC		 742 /*
743 * Some servers hang if client hello > 256 bytes as hack workaround
744 * chop number of supported ciphers to keep it well below this if we
745 * use TLS v1.2
746 */
747 if (TLS1_get_version(s) >= TLS1_2_VERSION
748 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
749 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
750#endif
751 s2n(i, p);
752 p += i;
753
754 /* COMPRESSION */
09b6c2ef 755#ifdef OPENSSL_NO_COMP
10621efd 756 *(p++) = 1;
09b6c2ef 757#else
566dda07 758
10621efd
MC		 759 if ((s->options & SSL_OP_NO_COMPRESSION)
760 || !s->ctx->comp_methods)
761 j = 0;
762 else
763 j = sk_SSL_COMP_num(s->ctx->comp_methods);
764 *(p++) = 1 + j;
765 for (i = 0; i < j; i++) {
766 comp = sk_SSL_COMP_value(s->ctx->comp_methods, i);
767 *(p++) = comp->id;
768 }
09b6c2ef 769#endif
10621efd 770 *(p++) = 0; /* Add the NULL method */
761772d7 771
ed3883d2 772#ifndef OPENSSL_NO_TLSEXT
10621efd
MC		 773 /* TLS extensions */
774 if (ssl_prepare_clienthello_tlsext(s) <= 0) {
775 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
776 goto err;
777 }
778 if ((p =
779 ssl_add_clienthello_tlsext(s, p,
780 buf + SSL3_RT_MAX_PLAIN_LENGTH)) ==
781 NULL) {
782 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
783 goto err;
784 }
ed3883d2 785#endif
10621efd
MC		 786
787 l = (p - d);
788 d = buf;
789 *(d++) = SSL3_MT_CLIENT_HELLO;
790 l2n3(l, d);
791
792 s->state = SSL3_ST_CW_CLNT_HELLO_B;
793 /* number of bytes to write */
794 s->init_num = p - buf;
795 s->init_off = 0;
796 }
797
798 /* SSL3_ST_CW_CLNT_HELLO_B */
799 return (ssl3_do_write(s, SSL3_RT_HANDSHAKE));
800 err:
801 return (-1);
802}
d02b48c6 803
36d16f8e 804int ssl3_get_server_hello(SSL *s)
10621efd
MC		 805{
806 STACK_OF(SSL_CIPHER) *sk;
807 const SSL_CIPHER *c;
808 unsigned char *p, *d;
809 int i, al, ok;
810 unsigned int j;
811 long n;
09b6c2ef 812#ifndef OPENSSL_NO_COMP
10621efd 813 SSL_COMP *comp;
09b6c2ef 814#endif
d02b48c6 815
10621efd
MC		 816 n = s->method->ssl_get_message(s,
817 SSL3_ST_CR_SRVR_HELLO_A,
818 SSL3_ST_CR_SRVR_HELLO_B, -1, 20000, &ok);
819
820 if (!ok)
821 return ((int)n);
54a656ef 822
10621efd
MC		 823 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) {
824 if (s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) {
825 if (s->d1->send_cookie == 0) {
826 s->s3->tmp.reuse_message = 1;
827 return 1;
828 } else { /* already sent a cookie */
829
830 al = SSL_AD_UNEXPECTED_MESSAGE;
831 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_MESSAGE_TYPE);
832 goto f_err;
833 }
834 }
835 }
836
837 if (s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) {
838 al = SSL_AD_UNEXPECTED_MESSAGE;
839 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_MESSAGE_TYPE);
840 goto f_err;
841 }
842
843 d = p = (unsigned char *)s->init_msg;
844
845 if ((p[0] != (s->version >> 8)) || (p[1] != (s->version & 0xff))) {
846 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION);
847 s->version = (s->version & 0xff00) | p[1];
848 al = SSL_AD_PROTOCOL_VERSION;
849 goto f_err;
850 }
851 p += 2;
852
853 /* load the server hello data */
854 /* load the server random */
855 memcpy(s->s3->server_random, p, SSL3_RANDOM_SIZE);
856 p += SSL3_RANDOM_SIZE;
857
858 s->hit = 0;
859
860 /* get the session-id */
861 j = *(p++);
862
863 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) {
864 al = SSL_AD_ILLEGAL_PARAMETER;
865 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG);
866 goto f_err;
867 }
12bf56c0 868#ifndef OPENSSL_NO_TLSEXT
10621efd
MC		 869 /*
870 * check if we want to resume the session based on external pre-shared
871 * secret
872 */
873 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb) {
874 SSL_CIPHER *pref_cipher = NULL;
875 s->session->master_key_length = sizeof(s->session->master_key);
876 if (s->tls_session_secret_cb(s, s->session->master_key,
877 &s->session->master_key_length,
878 NULL, &pref_cipher,
879 s->tls_session_secret_cb_arg)) {
880 s->session->cipher = pref_cipher ?
881 pref_cipher : ssl_get_cipher_by_char(s, p + j);
882 s->hit = 1;
883 }
884 }
885#endif /* OPENSSL_NO_TLSEXT */
886
887 if (!s->hit && j != 0 && j == s->session->session_id_length
888 && memcmp(p, s->session->session_id, j) == 0) {
889 if (s->sid_ctx_length != s->session->sid_ctx_length
890 || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) {
891 /* actually a client application bug */
892 al = SSL_AD_ILLEGAL_PARAMETER;
893 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
894 SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
895 goto f_err;
896 }
897 s->hit = 1;
898 }
899 /* a miss or crap from the other end */
900 if (!s->hit) {
901 /*
902 * If we were trying for session-id reuse, make a new SSL_SESSION so
903 * we don't stuff up other people
904 */
905 if (s->session->session_id_length > 0) {
906 if (!ssl_get_new_session(s, 0)) {
907 al = SSL_AD_INTERNAL_ERROR;
908 goto f_err;
909 }
910 }
911 s->session->session_id_length = j;
912 memcpy(s->session->session_id, p, j); /* j could be 0 */
913 }
914 p += j;
915 c = ssl_get_cipher_by_char(s, p);
916 if (c == NULL) {
917 /* unknown cipher */
918 al = SSL_AD_ILLEGAL_PARAMETER;
919 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED);
920 goto f_err;
921 }
922 /* TLS v1.2 only ciphersuites require v1.2 or later */
923 if ((c->algorithm_ssl & SSL_TLSV1_2) &&
924 (TLS1_get_version(s) < TLS1_2_VERSION)) {
925 al = SSL_AD_ILLEGAL_PARAMETER;
926 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
927 goto f_err;
928 }
83764a98 929#ifndef OPENSSL_NO_SRP
10621efd
MC		 930 if (((c->algorithm_mkey & SSL_kSRP) || (c->algorithm_auth & SSL_aSRP)) &&
931 !(s->srp_ctx.srp_Mask & SSL_kSRP)) {
932 al = SSL_AD_ILLEGAL_PARAMETER;
933 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
934 goto f_err;
935 }
936#endif /* OPENSSL_NO_SRP */
937 p += ssl_put_cipher_by_char(s, NULL, NULL);
938
939 sk = ssl_get_ciphers_by_id(s);
940 i = sk_SSL_CIPHER_find(sk, c);
941 if (i < 0) {
942 /* we did not say we would use this cipher */
943 al = SSL_AD_ILLEGAL_PARAMETER;
944 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
945 goto f_err;
946 }
947
948 /*
949 * Depending on the session caching (internal/external), the cipher
950 * and/or cipher_id values may not be set. Make sure that cipher_id is
951 * set and use it for comparison.
952 */
953 if (s->session->cipher)
954 s->session->cipher_id = s->session->cipher->id;
955 if (s->hit && (s->session->cipher_id != c->id)) {
346601bc
BM		 956/* Workaround is now obsolete */
957#if 0
10621efd 958 if (!(s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
346601bc 959#endif
10621efd
MC		 960 {
961 al = SSL_AD_ILLEGAL_PARAMETER;
962 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
963 SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
964 goto f_err;
965 }
966 }
967 s->s3->tmp.new_cipher = c;
968 /*
969 * Don't digest cached records if TLS v1.2: we may need them for client
970 * authentication.
971 */
972 if (TLS1_get_version(s) < TLS1_2_VERSION
973 && !ssl3_digest_cached_records(s)) {
974 al = SSL_AD_INTERNAL_ERROR;
975 goto f_err;
976 }
977 /* lets get the compression algorithm */
978 /* COMPRESSION */
09b6c2ef 979#ifdef OPENSSL_NO_COMP
10621efd
MC		 980 if (*(p++) != 0) {
981 al = SSL_AD_ILLEGAL_PARAMETER;
982 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
983 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
984 goto f_err;
985 }
986 /*
987 * If compression is disabled we'd better not try to resume a session
988 * using compression.
989 */
990 if (s->session->compress_meth != 0) {
991 al = SSL_AD_INTERNAL_ERROR;
992 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION);
993 goto f_err;
994 }
09b6c2ef 995#else
10621efd
MC		 996 j = *(p++);
997 if (s->hit && j != s->session->compress_meth) {
998 al = SSL_AD_ILLEGAL_PARAMETER;
999 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
1000 SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1001 goto f_err;
1002 }
1003 if (j == 0)
1004 comp = NULL;
1005 else if (s->options & SSL_OP_NO_COMPRESSION) {
1006 al = SSL_AD_ILLEGAL_PARAMETER;
1007 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED);
1008 goto f_err;
1009 } else
1010 comp = ssl3_comp_find(s->ctx->comp_methods, j);
1011
1012 if ((j != 0) && (comp == NULL)) {
1013 al = SSL_AD_ILLEGAL_PARAMETER;
1014 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
1015 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1016 goto f_err;
1017 } else {
1018 s->s3->tmp.new_compression = comp;
1019 }
09b6c2ef 1020#endif
761772d7 1021
ed3883d2 1022#ifndef OPENSSL_NO_TLSEXT
10621efd
MC		 1023 /* TLS extensions */
1024 if (s->version >= SSL3_VERSION) {
1025 if (!ssl_parse_serverhello_tlsext(s, &p, d, n, &al)) {
1026 /* 'al' set by ssl_parse_serverhello_tlsext */
1027 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_PARSE_TLSEXT);
1028 goto f_err;
1029 }
1030 if (ssl_check_serverhello_tlsext(s) <= 0) {
1031 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_SERVERHELLO_TLSEXT);
1032 goto err;
1033 }
1034 }
ed3883d2 1035#endif
d02b48c6 1036
10621efd
MC		 1037 if (p != (d + n)) {
1038 /* wrong packet length */
1039 al = SSL_AD_DECODE_ERROR;
1040 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH);
1041 goto f_err;
1042 }
1043
1044 return (1);
1045 f_err:
1046 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1047 err:
1048 return (-1);
1049}
d02b48c6 1050
36d16f8e 1051int ssl3_get_server_certificate(SSL *s)
10621efd
MC		 1052{
1053 int al, i, ok, ret = -1;
1054 unsigned long n, nc, llen, l;
1055 X509 *x = NULL;
1056 const unsigned char *q, *p;
1057 unsigned char *d;
1058 STACK_OF(X509) *sk = NULL;
1059 SESS_CERT *sc;
1060 EVP_PKEY *pkey = NULL;
1061 int need_cert = 1; /* VRS: 0=> will allow null cert if auth ==
1062 * KRB5 */
1063
1064 n = s->method->ssl_get_message(s,
1065 SSL3_ST_CR_CERT_A,
1066 SSL3_ST_CR_CERT_B,
1067 -1, s->max_cert_list, &ok);
1068
1069 if (!ok)
1070 return ((int)n);
1071
1072 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1073 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1074 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE))) {
1075 s->s3->tmp.reuse_message = 1;
1076 return (1);
1077 }
1078
1079 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) {
1080 al = SSL_AD_UNEXPECTED_MESSAGE;
1081 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_BAD_MESSAGE_TYPE);
1082 goto f_err;
1083 }
1084 p = d = (unsigned char *)s->init_msg;
1085
1086 if ((sk = sk_X509_new_null()) == NULL) {
1087 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1088 goto err;
1089 }
1090
1091 n2l3(p, llen);
1092 if (llen + 3 != n) {
1093 al = SSL_AD_DECODE_ERROR;
1094 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH);
1095 goto f_err;
1096 }
1097 for (nc = 0; nc < llen;) {
1098 n2l3(p, l);
1099 if ((l + nc + 3) > llen) {
1100 al = SSL_AD_DECODE_ERROR;
1101 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1102 SSL_R_CERT_LENGTH_MISMATCH);
1103 goto f_err;
1104 }
1105
1106 q = p;
1107 x = d2i_X509(NULL, &q, l);
1108 if (x == NULL) {
1109 al = SSL_AD_BAD_CERTIFICATE;
1110 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_ASN1_LIB);
1111 goto f_err;
1112 }
1113 if (q != (p + l)) {
1114 al = SSL_AD_DECODE_ERROR;
1115 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1116 SSL_R_CERT_LENGTH_MISMATCH);
1117 goto f_err;
1118 }
1119 if (!sk_X509_push(sk, x)) {
1120 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1121 goto err;
1122 }
1123 x = NULL;
1124 nc += l + 3;
1125 p = q;
1126 }
1127
1128 i = ssl_verify_cert_chain(s, sk);
1129 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
82d5d46c 1130#ifndef OPENSSL_NO_KRB5
10621efd
MC		 1131 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1132 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1133#endif /* OPENSSL_NO_KRB5 */
1134 ) {
1135 al = ssl_verify_alarm_type(s->verify_result);
1136 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1137 SSL_R_CERTIFICATE_VERIFY_FAILED);
1138 goto f_err;
1139 }
1140 ERR_clear_error(); /* but we keep s->verify_result */
1141
1142 sc = ssl_sess_cert_new();
1143 if (sc == NULL)
1144 goto err;
1145
1146 if (s->session->sess_cert)
1147 ssl_sess_cert_free(s->session->sess_cert);
1148 s->session->sess_cert = sc;
1149
1150 sc->cert_chain = sk;
1151 /*
1152 * Inconsistency alert: cert_chain does include the peer's certificate,
1153 * which we don't include in s3_srvr.c
1154 */
1155 x = sk_X509_value(sk, 0);
1156 sk = NULL;
1157 /*
1158 * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end
1159 */
1160
1161 pkey = X509_get_pubkey(x);
1162
1163 /* VRS: allow null cert if auth == KRB5 */
1164 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1165 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1166 ? 0 : 1;
f9b3bff6
RL		 1167
1168#ifdef KSSL_DEBUG
10621efd
MC		 1169 fprintf(stderr, "pkey,x = %p, %p\n", pkey, x);
1170 fprintf(stderr, "ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x, pkey));
1171 fprintf(stderr, "cipher, alg, nc = %s, %lx, %lx, %d\n",
1172 s->s3->tmp.new_cipher->name,
1173 s->s3->tmp.new_cipher->algorithm_mkey,
1174 s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1175#endif /* KSSL_DEBUG */
1176
1177 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) {
1178 x = NULL;
1179 al = SSL3_AL_FATAL;
1180 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1181 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1182 goto f_err;
1183 }
1184
1185 i = ssl_cert_type(x, pkey);
1186 if (need_cert && i < 0) {
1187 x = NULL;
1188 al = SSL3_AL_FATAL;
1189 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1190 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1191 goto f_err;
1192 }
1193
1194 if (need_cert) {
1195 sc->peer_cert_type = i;
1196 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
1197 /*
1198 * Why would the following ever happen? We just created sc a couple
1199 * of lines ago.
1200 */
1201 if (sc->peer_pkeys[i].x509 != NULL)
1202 X509_free(sc->peer_pkeys[i].x509);
1203 sc->peer_pkeys[i].x509 = x;
1204 sc->peer_key = &(sc->peer_pkeys[i]);
1205
1206 if (s->session->peer != NULL)
1207 X509_free(s->session->peer);
1208 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
1209 s->session->peer = x;
1210 } else {
1211 sc->peer_cert_type = i;
1212 sc->peer_key = NULL;
1213
1214 if (s->session->peer != NULL)
1215 X509_free(s->session->peer);
1216 s->session->peer = NULL;
1217 }
1218 s->session->verify_result = s->verify_result;
1219
1220 x = NULL;
1221 ret = 1;
1222
1223 if (0) {
1224 f_err:
1225 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1226 }
1227 err:
1228 EVP_PKEY_free(pkey);
1229 X509_free(x);
1230 sk_X509_pop_free(sk, X509_free);
1231 return (ret);
1232}
d02b48c6 1233
36d16f8e 1234int ssl3_get_key_exchange(SSL *s)
10621efd 1235{
bc36ee62 1236#ifndef OPENSSL_NO_RSA
10621efd
MC		 1237 unsigned char *q, md_buf[EVP_MAX_MD_SIZE * 2];
1238#endif
1239 EVP_MD_CTX md_ctx;
1240 unsigned char *param, *p;
1241 int al, j, ok;
1242 long i, param_len, n, alg_k, alg_a;
1243 EVP_PKEY *pkey = NULL;
1244 const EVP_MD *md = NULL;
bc36ee62 1245#ifndef OPENSSL_NO_RSA
10621efd 1246 RSA *rsa = NULL;
79df9d62 1247#endif
bc36ee62 1248#ifndef OPENSSL_NO_DH
10621efd 1249 DH *dh = NULL;
58964a49 1250#endif
ea262260 1251#ifndef OPENSSL_NO_ECDH
10621efd
MC		 1252 EC_KEY *ecdh = NULL;
1253 BN_CTX *bn_ctx = NULL;
1254 EC_POINT *srvr_ecpoint = NULL;
1255 int curve_nid = 0;
1256 int encoded_pt_len = 0;
1257#endif
1258
1259 EVP_MD_CTX_init(&md_ctx);
1260
1261 /*
1262 * use same message size as in ssl3_get_certificate_request() as
1263 * ServerKeyExchange message may be skipped
1264 */
1265 n = s->method->ssl_get_message(s,
1266 SSL3_ST_CR_KEY_EXCH_A,
1267 SSL3_ST_CR_KEY_EXCH_B,
1268 -1, s->max_cert_list, &ok);
1269 if (!ok)
1270 return ((int)n);
1271
1272 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1273
1274 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) {
1275 /*
1276 * Can't skip server key exchange if this is an ephemeral
1277 * ciphersuite.
1278 */
1279 if (alg_k & (SSL_kEDH | SSL_kEECDH)) {
1280 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1281 al = SSL_AD_UNEXPECTED_MESSAGE;
1282 goto f_err;
1283 }
ddac1974 1284#ifndef OPENSSL_NO_PSK
10621efd
MC		 1285 /*
1286 * In plain PSK ciphersuite, ServerKeyExchange can be omitted if no
1287 * identity hint is sent. Set session->sess_cert anyway to avoid
1288 * problems later.
1289 */
1290 if (alg_k & SSL_kPSK) {
1291 s->session->sess_cert = ssl_sess_cert_new();
1292 if (s->ctx->psk_identity_hint)
1293 OPENSSL_free(s->ctx->psk_identity_hint);
1294 s->ctx->psk_identity_hint = NULL;
1295 }
ddac1974 1296#endif
10621efd
MC		 1297 s->s3->tmp.reuse_message = 1;
1298 return (1);
1299 }
d02b48c6 1300
10621efd
MC		 1301 param = p = (unsigned char *)s->init_msg;
1302 if (s->session->sess_cert != NULL) {
bc36ee62 1303#ifndef OPENSSL_NO_RSA
10621efd
MC		 1304 if (s->session->sess_cert->peer_rsa_tmp != NULL) {
1305 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1306 s->session->sess_cert->peer_rsa_tmp = NULL;
1307 }
d02b48c6 1308#endif
bc36ee62 1309#ifndef OPENSSL_NO_DH
10621efd
MC		 1310 if (s->session->sess_cert->peer_dh_tmp) {
1311 DH_free(s->session->sess_cert->peer_dh_tmp);
1312 s->session->sess_cert->peer_dh_tmp = NULL;
1313 }
ea262260
BM		 1314#endif
1315#ifndef OPENSSL_NO_ECDH
10621efd
MC		 1316 if (s->session->sess_cert->peer_ecdh_tmp) {
1317 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1318 s->session->sess_cert->peer_ecdh_tmp = NULL;
1319 }
d02b48c6 1320#endif
10621efd
MC		 1321 } else {
1322 s->session->sess_cert = ssl_sess_cert_new();
1323 }
d02b48c6 1324
10621efd
MC		 1325 /* Total length of the parameters including the length prefix */
1326 param_len = 0;
0ed8e95c 1327
10621efd 1328 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
d02b48c6 1329
10621efd 1330 al = SSL_AD_DECODE_ERROR;
0ed8e95c 1331
ddac1974 1332#ifndef OPENSSL_NO_PSK
10621efd
MC		 1333 if (alg_k & SSL_kPSK) {
1334 char tmp_id_hint[PSK_MAX_IDENTITY_LEN + 1];
1335
1336 param_len = 2;
1337 if (param_len > n) {
1338 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1339 goto f_err;
1340 }
1341 n2s(p, i);
1342
1343 /*
1344 * Store PSK identity hint for later use, hint is used in
1345 * ssl3_send_client_key_exchange. Assume that the maximum length of
1346 * a PSK identity hint can be as long as the maximum length of a PSK
1347 * identity.
1348 */
1349 if (i > PSK_MAX_IDENTITY_LEN) {
1350 al = SSL_AD_HANDSHAKE_FAILURE;
1351 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_DATA_LENGTH_TOO_LONG);
1352 goto f_err;
1353 }
1354 if (i > n - param_len) {
1355 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1356 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1357 goto f_err;
1358 }
1359 param_len += i;
1360
1361 /*
1362 * If received PSK identity hint contains NULL characters, the hint
1363 * is truncated from the first NULL. p may not be ending with NULL,
1364 * so create a NULL-terminated string.
1365 */
1366 memcpy(tmp_id_hint, p, i);
1367 memset(tmp_id_hint + i, 0, PSK_MAX_IDENTITY_LEN + 1 - i);
1368 if (s->ctx->psk_identity_hint != NULL)
1369 OPENSSL_free(s->ctx->psk_identity_hint);
1370 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1371 if (s->ctx->psk_identity_hint == NULL) {
1372 al = SSL_AD_HANDSHAKE_FAILURE;
1373 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1374 goto f_err;
1375 }
1376
1377 p += i;
1378 n -= param_len;
1379 } else
1380#endif /* !OPENSSL_NO_PSK */
a149b246 1381#ifndef OPENSSL_NO_SRP
10621efd
MC		 1382 if (alg_k & SSL_kSRP) {
1383 param_len = 2;
1384 if (param_len > n) {
1385 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1386 goto f_err;
1387 }
1388 n2s(p, i);
1389
1390 if (i > n - param_len) {
1391 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_N_LENGTH);
1392 goto f_err;
1393 }
1394 param_len += i;
1395
1396 if (!(s->srp_ctx.N = BN_bin2bn(p, i, NULL))) {
1397 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1398 goto err;
1399 }
1400 p += i;
1401
1402 if (2 > n - param_len) {
1403 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1404 goto f_err;
1405 }
1406 param_len += 2;
1407
1408 n2s(p, i);
1409
1410 if (i > n - param_len) {
1411 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_G_LENGTH);
1412 goto f_err;
1413 }
1414 param_len += i;
1415
1416 if (!(s->srp_ctx.g = BN_bin2bn(p, i, NULL))) {
1417 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1418 goto err;
1419 }
1420 p += i;
1421
1422 if (1 > n - param_len) {
1423 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1424 goto f_err;
1425 }
1426 param_len += 1;
1427
1428 i = (unsigned int)(p[0]);
1429 p++;
1430
1431 if (i > n - param_len) {
1432 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_S_LENGTH);
1433 goto f_err;
1434 }
1435 param_len += i;
1436
1437 if (!(s->srp_ctx.s = BN_bin2bn(p, i, NULL))) {
1438 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1439 goto err;
1440 }
1441 p += i;
1442
1443 if (2 > n - param_len) {
1444 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1445 goto f_err;
1446 }
1447 param_len += 2;
1448
1449 n2s(p, i);
1450
1451 if (i > n - param_len) {
1452 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_B_LENGTH);
1453 goto f_err;
1454 }
1455 param_len += i;
1456
1457 if (!(s->srp_ctx.B = BN_bin2bn(p, i, NULL))) {
1458 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1459 goto err;
1460 }
1461 p += i;
1462 n -= param_len;
1463
1464 if (!srp_verify_server_param(s, &al)) {
1465 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_PARAMETERS);
1466 goto f_err;
1467 }
d15d17bb 1468
a149b246 1469/* We must check if there is a certificate */
10621efd
MC		 1470# ifndef OPENSSL_NO_RSA
1471 if (alg_a & SSL_aRSA)
1472 pkey =
1473 X509_get_pubkey(s->session->
1474 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1475# else
1476 if (0) ;
1477# endif
1478# ifndef OPENSSL_NO_DSA
1479 else if (alg_a & SSL_aDSS)
1480 pkey =
1481 X509_get_pubkey(s->session->
1482 sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].
1483 x509);
1484# endif
1485 } else
1486#endif /* !OPENSSL_NO_SRP */
a149b246 1487#ifndef OPENSSL_NO_RSA
10621efd
MC		 1488 if (alg_k & SSL_kRSA) {
1489 /* Temporary RSA keys only allowed in export ciphersuites */
1490 if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) {
1491 al = SSL_AD_UNEXPECTED_MESSAGE;
1492 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1493 goto f_err;
1494 }
1495 if ((rsa = RSA_new()) == NULL) {
1496 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1497 goto err;
1498 }
1499
1500 param_len = 2;
1501 if (param_len > n) {
1502 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1503 goto f_err;
1504 }
1505 n2s(p, i);
1506
1507 if (i > n - param_len) {
1508 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_MODULUS_LENGTH);
1509 goto f_err;
1510 }
1511 param_len += i;
1512
1513 if (!(rsa->n = BN_bin2bn(p, i, rsa->n))) {
1514 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1515 goto err;
1516 }
1517 p += i;
1518
1519 if (2 > n - param_len) {
1520 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1521 goto f_err;
1522 }
1523 param_len += 2;
1524
1525 n2s(p, i);
1526
1527 if (i > n - param_len) {
1528 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_E_LENGTH);
1529 goto f_err;
1530 }
1531 param_len += i;
1532
1533 if (!(rsa->e = BN_bin2bn(p, i, rsa->e))) {
1534 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1535 goto err;
1536 }
1537 p += i;
1538 n -= param_len;
1539
1540 /* this should be because we are using an export cipher */
1541 if (alg_a & SSL_aRSA)
1542 pkey =
1543 X509_get_pubkey(s->session->
1544 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1545 else {
1546 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1547 goto err;
1548 }
1549 s->session->sess_cert->peer_rsa_tmp = rsa;
1550 rsa = NULL;
1551 }
1552#else /* OPENSSL_NO_RSA */
1553 if (0) ;
d02b48c6 1554#endif
bc36ee62 1555#ifndef OPENSSL_NO_DH
10621efd
MC		 1556 else if (alg_k & SSL_kEDH) {
1557 if ((dh = DH_new()) == NULL) {
1558 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_DH_LIB);
1559 goto err;
1560 }
d02b48c6 1561
10621efd
MC		 1562 param_len = 2;
1563 if (param_len > n) {
1564 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1565 goto f_err;
1566 }
1567 n2s(p, i);
1568
1569 if (i > n - param_len) {
1570 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_P_LENGTH);
1571 goto f_err;
1572 }
1573 param_len += i;
1574
1575 if (!(dh->p = BN_bin2bn(p, i, NULL))) {
1576 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1577 goto err;
1578 }
1579 p += i;
1580
1581 if (2 > n - param_len) {
1582 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1583 goto f_err;
1584 }
1585 param_len += 2;
1586
1587 n2s(p, i);
1588
1589 if (i > n - param_len) {
1590 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_G_LENGTH);
1591 goto f_err;
1592 }
1593 param_len += i;
1594
1595 if (!(dh->g = BN_bin2bn(p, i, NULL))) {
1596 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1597 goto err;
1598 }
1599 p += i;
1600
1601 if (2 > n - param_len) {
1602 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1603 goto f_err;
1604 }
1605 param_len += 2;
1606
1607 n2s(p, i);
1608
1609 if (i > n - param_len) {
1610 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_PUB_KEY_LENGTH);
1611 goto f_err;
1612 }
1613 param_len += i;
1614
1615 if (!(dh->pub_key = BN_bin2bn(p, i, NULL))) {
1616 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1617 goto err;
1618 }
1619 p += i;
1620 n -= param_len;
1621
1622# ifndef OPENSSL_NO_RSA
1623 if (alg_a & SSL_aRSA)
1624 pkey =
1625 X509_get_pubkey(s->session->
1626 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1627# else
1628 if (0) ;
1629# endif
1630# ifndef OPENSSL_NO_DSA
1631 else if (alg_a & SSL_aDSS)
1632 pkey =
1633 X509_get_pubkey(s->session->
1634 sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].
1635 x509);
1636# endif
1637 /* else anonymous DH, so no certificate or pkey. */
1638
1639 s->session->sess_cert->peer_dh_tmp = dh;
1640 dh = NULL;
1641 } else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd)) {
1642 al = SSL_AD_ILLEGAL_PARAMETER;
1643 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1644 SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1645 goto f_err;
1646 }
1647#endif /* !OPENSSL_NO_DH */
ea262260
BM		 1648
1649#ifndef OPENSSL_NO_ECDH
10621efd
MC		 1650 else if (alg_k & SSL_kEECDH) {
1651 EC_GROUP *ngroup;
1652 const EC_GROUP *group;
1653
1654 if ((ecdh = EC_KEY_new()) == NULL) {
1655 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1656 goto err;
1657 }
1658
1659 /*
1660 * Extract elliptic curve parameters and the server's ephemeral ECDH
1661 * public key. Keep accumulating lengths of various components in
1662 * param_len and make sure it never exceeds n.
1663 */
1664
1665 /*
1666 * XXX: For now we only support named (not generic) curves and the
1667 * ECParameters in this case is just three bytes. We also need one
1668 * byte for the length of the encoded point
1669 */
1670 param_len = 4;
1671 if (param_len > n) {
1672 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1673 goto f_err;
1674 }
1675
1676 if ((*p != NAMED_CURVE_TYPE) ||
1677 ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)) {
1678 al = SSL_AD_INTERNAL_ERROR;
1679 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1680 SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1681 goto f_err;
1682 }
1683
1684 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1685 if (ngroup == NULL) {
1686 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB);
1687 goto err;
1688 }
1689 if (EC_KEY_set_group(ecdh, ngroup) == 0) {
1690 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB);
1691 goto err;
1692 }
1693 EC_GROUP_free(ngroup);
1694
1695 group = EC_KEY_get0_group(ecdh);
1696
1697 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1698 (EC_GROUP_get_degree(group) > 163)) {
1699 al = SSL_AD_EXPORT_RESTRICTION;
1700 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1701 SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1702 goto f_err;
1703 }
1704
1705 p += 3;
1706
1707 /* Next, get the encoded ECPoint */
1708 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1709 ((bn_ctx = BN_CTX_new()) == NULL)) {
1710 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1711 goto err;
1712 }
1713
1714 encoded_pt_len = *p; /* length of encoded point */
1715 p += 1;
1716
1717 if ((encoded_pt_len > n - param_len) ||
1718 (EC_POINT_oct2point(group, srvr_ecpoint,
1719 p, encoded_pt_len, bn_ctx) == 0)) {
1720 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_ECPOINT);
1721 goto f_err;
1722 }
1723 param_len += encoded_pt_len;
1724
1725 n -= param_len;
1726 p += encoded_pt_len;
1727
1728 /*
1729 * The ECC/TLS specification does not mention the use of DSA to sign
1730 * ECParameters in the server key exchange message. We do support RSA
1731 * and ECDSA.
1732 */
1733 if (0) ;
1734# ifndef OPENSSL_NO_RSA
1735 else if (alg_a & SSL_aRSA)
1736 pkey =
1737 X509_get_pubkey(s->session->
1738 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1739# endif
1740# ifndef OPENSSL_NO_ECDSA
1741 else if (alg_a & SSL_aECDSA)
1742 pkey =
1743 X509_get_pubkey(s->session->
1744 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1745# endif
1746 /* else anonymous ECDH, so no certificate or pkey. */
1747 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1748 s->session->sess_cert->peer_ecdh_tmp = ecdh;
1749 ecdh = NULL;
1750 BN_CTX_free(bn_ctx);
1751 bn_ctx = NULL;
1752 EC_POINT_free(srvr_ecpoint);
1753 srvr_ecpoint = NULL;
1754 } else if (alg_k) {
1755 al = SSL_AD_UNEXPECTED_MESSAGE;
1756 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1757 goto f_err;
1758 }
1759#endif /* !OPENSSL_NO_ECDH */
1760
1761 /* p points to the next byte, there are 'n' bytes left */
1762
1763 /* if it was signed, check the signature */
1764 if (pkey != NULL) {
1765 if (TLS1_get_version(s) >= TLS1_2_VERSION) {
1766 int sigalg;
1767 if (2 > n) {
1768 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1769 goto f_err;
1770 }
1771
1772 sigalg = tls12_get_sigid(pkey);
1773 /* Should never happen */
1774 if (sigalg == -1) {
1775 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1776 goto err;
1777 }
1778 /* Check key type is consistent with signature */
1779 if (sigalg != (int)p[1]) {
1780 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1781 SSL_R_WRONG_SIGNATURE_TYPE);
1782 al = SSL_AD_DECODE_ERROR;
1783 goto f_err;
1784 }
1785 md = tls12_get_hash(p[0]);
1786 if (md == NULL) {
1787 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNKNOWN_DIGEST);
1788 goto f_err;
1789 }
9472baae 1790#ifdef SSL_DEBUG
10621efd 1791 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
9472baae 1792#endif
10621efd
MC		 1793 p += 2;
1794 n -= 2;
1795 } else
1796 md = EVP_sha1();
d02b48c6 1797
10621efd
MC		 1798 if (2 > n) {
1799 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1800 goto f_err;
1801 }
1802 n2s(p, i);
1803 n -= 2;
1804 j = EVP_PKEY_size(pkey);
1805
1806 /*
1807 * Check signature length. If n is 0 then signature is empty
1808 */
1809 if ((i != n) || (n > j) || (n <= 0)) {
1810 /* wrong packet length */
1811 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH);
1812 goto f_err;
1813 }
bc36ee62 1814#ifndef OPENSSL_NO_RSA
10621efd
MC		 1815 if (pkey->type == EVP_PKEY_RSA
1816 && TLS1_get_version(s) < TLS1_2_VERSION) {
1817 int num;
1818 unsigned int size;
1819
1820 j = 0;
1821 q = md_buf;
1822 for (num = 2; num > 0; num--) {
1823 EVP_MD_CTX_set_flags(&md_ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1824 EVP_DigestInit_ex(&md_ctx, (num == 2)
1825 ? s->ctx->md5 : s->ctx->sha1, NULL);
1826 EVP_DigestUpdate(&md_ctx, &(s->s3->client_random[0]),
1827 SSL3_RANDOM_SIZE);
1828 EVP_DigestUpdate(&md_ctx, &(s->s3->server_random[0]),
1829 SSL3_RANDOM_SIZE);
1830 EVP_DigestUpdate(&md_ctx, param, param_len);
1831 EVP_DigestFinal_ex(&md_ctx, q, &size);
1832 q += size;
1833 j += size;
1834 }
1835 i = RSA_verify(NID_md5_sha1, md_buf, j, p, n, pkey->pkey.rsa);
1836 if (i < 0) {
1837 al = SSL_AD_DECRYPT_ERROR;
1838 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_DECRYPT);
1839 goto f_err;
1840 }
1841 if (i == 0) {
1842 /* bad signature */
1843 al = SSL_AD_DECRYPT_ERROR;
1844 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
1845 goto f_err;
1846 }
1847 } else
1848#endif
1849 {
1850 EVP_VerifyInit_ex(&md_ctx, md, NULL);
1851 EVP_VerifyUpdate(&md_ctx, &(s->s3->client_random[0]),
1852 SSL3_RANDOM_SIZE);
1853 EVP_VerifyUpdate(&md_ctx, &(s->s3->server_random[0]),
1854 SSL3_RANDOM_SIZE);
1855 EVP_VerifyUpdate(&md_ctx, param, param_len);
1856 if (EVP_VerifyFinal(&md_ctx, p, (int)n, pkey) <= 0) {
1857 /* bad signature */
1858 al = SSL_AD_DECRYPT_ERROR;
1859 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
1860 goto f_err;
1861 }
1862 }
1863 } else {
1864 /* aNULL, aSRP or kPSK do not need public keys */
1865 if (!(alg_a & (SSL_aNULL | SSL_aSRP)) && !(alg_k & SSL_kPSK)) {
1866 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1867 goto err;
1868 }
1869 /* still data left over */
1870 if (n != 0) {
1871 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE);
1872 goto f_err;
1873 }
1874 }
1875 EVP_PKEY_free(pkey);
1876 EVP_MD_CTX_cleanup(&md_ctx);
1877 return (1);
1878 f_err:
1879 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1880 err:
1881 EVP_PKEY_free(pkey);
bc36ee62 1882#ifndef OPENSSL_NO_RSA
10621efd
MC		 1883 if (rsa != NULL)
1884 RSA_free(rsa);
6b521df3 1885#endif
bc36ee62 1886#ifndef OPENSSL_NO_DH
10621efd
MC		 1887 if (dh != NULL)
1888 DH_free(dh);
ea262260
BM		 1889#endif
1890#ifndef OPENSSL_NO_ECDH
10621efd
MC		 1891 BN_CTX_free(bn_ctx);
1892 EC_POINT_free(srvr_ecpoint);
1893 if (ecdh != NULL)
1894 EC_KEY_free(ecdh);
6b521df3 1895#endif
10621efd
MC		 1896 EVP_MD_CTX_cleanup(&md_ctx);
1897 return (-1);
1898}
d02b48c6 1899
36d16f8e 1900int ssl3_get_certificate_request(SSL *s)
10621efd
MC		 1901{
1902 int ok, ret = 0;
1903 unsigned long n, nc, l;
1904 unsigned int llen, ctype_num, i;
1905 X509_NAME *xn = NULL;
1906 const unsigned char *p, *q;
1907 unsigned char *d;
1908 STACK_OF(X509_NAME) *ca_sk = NULL;
1909
1910 n = s->method->ssl_get_message(s,
1911 SSL3_ST_CR_CERT_REQ_A,
1912 SSL3_ST_CR_CERT_REQ_B,
1913 -1, s->max_cert_list, &ok);
1914
1915 if (!ok)
1916 return ((int)n);
1917
1918 s->s3->tmp.cert_req = 0;
1919
1920 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) {
1921 s->s3->tmp.reuse_message = 1;
1922 /*
1923 * If we get here we don't need any cached handshake records as we
1924 * wont be doing client auth.
1925 */
1926 if (s->s3->handshake_buffer) {
1927 if (!ssl3_digest_cached_records(s))
1928 goto err;
1929 }
1930 return (1);
1931 }
1932
1933 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) {
1934 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
1935 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_WRONG_MESSAGE_TYPE);
1936 goto err;
1937 }
1938
1939 /* TLS does not like anon-DH with client cert */
1940 if (s->version > SSL3_VERSION) {
1941 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) {
1942 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
1943 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
1944 SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1945 goto err;
1946 }
1947 }
1948
1949 p = d = (unsigned char *)s->init_msg;
1950
1951 if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) {
1952 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1953 goto err;
1954 }
1955
1956 /* get the certificate types */
1957 ctype_num = *(p++);
1958 if (ctype_num > SSL3_CT_NUMBER)
1959 ctype_num = SSL3_CT_NUMBER;
1960 for (i = 0; i < ctype_num; i++)
1961 s->s3->tmp.ctype[i] = p[i];
1962 p += ctype_num;
1963 if (TLS1_get_version(s) >= TLS1_2_VERSION) {
1964 n2s(p, llen);
1965 /*
1966 * Check we have enough room for signature algorithms and following
1967 * length value.
1968 */
1969 if ((unsigned long)(p - d + llen + 2) > n) {
1970 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1971 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
1972 SSL_R_DATA_LENGTH_TOO_LONG);
1973 goto err;
1974 }
1975 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen)) {
1976 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1977 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
1978 SSL_R_SIGNATURE_ALGORITHMS_ERROR);
1979 goto err;
1980 }
1981 p += llen;
1982 }
1983
1984 /* get the CA RDNs */
1985 n2s(p, llen);
dfeab068 1986#if 0
10621efd
MC		 1987 {
1988 FILE *out;
1989 out = fopen("/tmp/vsign.der", "w");
1990 fwrite(p, 1, llen, out);
1991 fclose(out);
1992 }
1993#endif
1994
1995 if ((unsigned long)(p - d + llen) != n) {
1996 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1997 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
1998 goto err;
1999 }
2000
2001 for (nc = 0; nc < llen;) {
2002 n2s(p, l);
2003 if ((l + nc + 2) > llen) {
2004 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
2005 goto cont; /* netscape bugs */
2006 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2007 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_CA_DN_TOO_LONG);
2008 goto err;
2009 }
2010
2011 q = p;
2012
2013 if ((xn = d2i_X509_NAME(NULL, &q, l)) == NULL) {
2014 /* If netscape tolerance is on, ignore errors */
2015 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
2016 goto cont;
2017 else {
2018 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2019 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB);
2020 goto err;
2021 }
2022 }
2023
2024 if (q != (p + l)) {
2025 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2026 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
2027 SSL_R_CA_DN_LENGTH_MISMATCH);
2028 goto err;
2029 }
2030 if (!sk_X509_NAME_push(ca_sk, xn)) {
2031 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
2032 goto err;
2033 }
2034
2035 p += l;
2036 nc += l + 2;
2037 }
2038
2039 if (0) {
2040 cont:
2041 ERR_clear_error();
2042 }
2043
2044 /* we should setup a certificate to return.... */
2045 s->s3->tmp.cert_req = 1;
2046 s->s3->tmp.ctype_num = ctype_num;
2047 if (s->s3->tmp.ca_names != NULL)
2048 sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
2049 s->s3->tmp.ca_names = ca_sk;
2050 ca_sk = NULL;
2051
2052 ret = 1;
2053 err:
2054 if (ca_sk != NULL)
2055 sk_X509_NAME_pop_free(ca_sk, X509_NAME_free);
2056 return (ret);
2057}
2058
2059static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
dfeab068 2060{
10621efd 2061 return (X509_NAME_cmp(*a, *b));
dfeab068 2062}
dfeab068 2063
6434abbf
DSH		 2064#ifndef OPENSSL_NO_TLSEXT
2065int ssl3_get_new_session_ticket(SSL *s)
10621efd
MC		 2066{
2067 int ok, al, ret = 0, ticklen;
2068 long n;
2069 const unsigned char *p;
2070 unsigned char *d;
2071
2072 n = s->method->ssl_get_message(s,
2073 SSL3_ST_CR_SESSION_TICKET_A,
2074 SSL3_ST_CR_SESSION_TICKET_B,
2075 SSL3_MT_NEWSESSION_TICKET, 16384, &ok);
2076
2077 if (!ok)
2078 return ((int)n);
2079
2080 if (n < 6) {
2081 /* need at least ticket_lifetime_hint + ticket length */
2082 al = SSL_AD_DECODE_ERROR;
2083 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
2084 goto f_err;
2085 }
2086
2087 p = d = (unsigned char *)s->init_msg;
2088 n2l(p, s->session->tlsext_tick_lifetime_hint);
2089 n2s(p, ticklen);
2090 /* ticket_lifetime_hint + ticket_length + ticket */
2091 if (ticklen + 6 != n) {
2092 al = SSL_AD_DECODE_ERROR;
2093 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
2094 goto f_err;
2095 }
2096 if (s->session->tlsext_tick) {
2097 OPENSSL_free(s->session->tlsext_tick);
2098 s->session->tlsext_ticklen = 0;
2099 }
2100 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2101 if (!s->session->tlsext_tick) {
2102 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
2103 goto err;
2104 }
2105 memcpy(s->session->tlsext_tick, p, ticklen);
2106 s->session->tlsext_ticklen = ticklen;
2107 /*
2108 * There are two ways to detect a resumed ticket session. One is to set
2109 * an appropriate session ID and then the server must return a match in
2110 * ServerHello. This allows the normal client session ID matching to work
2111 * and we know much earlier that the ticket has been accepted. The
2112 * other way is to set zero length session ID when the ticket is
2113 * presented and rely on the handshake to determine session resumption.
2114 * We choose the former approach because this fits in with assumptions
2115 * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is
2116 * SHA256 is disabled) hash of the ticket.
2117 */
2118 EVP_Digest(p, ticklen,
2119 s->session->session_id, &s->session->session_id_length,
2120# ifndef OPENSSL_NO_SHA256
2121 EVP_sha256(), NULL);
2122# else
2123 EVP_sha1(), NULL);
2124# endif
2125 ret = 1;
2126 return (ret);
2127 f_err:
2128 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2129 err:
2130 return (-1);
2131}
67c8e7f4
DSH		 2132
2133int ssl3_get_cert_status(SSL *s)
10621efd
MC		 2134{
2135 int ok, al;
2136 unsigned long resplen, n;
2137 const unsigned char *p;
2138
2139 n = s->method->ssl_get_message(s,
2140 SSL3_ST_CR_CERT_STATUS_A,
2141 SSL3_ST_CR_CERT_STATUS_B,
2142 SSL3_MT_CERTIFICATE_STATUS, 16384, &ok);
2143
2144 if (!ok)
2145 return ((int)n);
2146 if (n < 4) {
2147 /* need at least status type + length */
2148 al = SSL_AD_DECODE_ERROR;
2149 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
2150 goto f_err;
2151 }
2152 p = (unsigned char *)s->init_msg;
2153 if (*p++ != TLSEXT_STATUSTYPE_ocsp) {
2154 al = SSL_AD_DECODE_ERROR;
2155 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE);
2156 goto f_err;
2157 }
2158 n2l3(p, resplen);
2159 if (resplen + 4 != n) {
2160 al = SSL_AD_DECODE_ERROR;
2161 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
2162 goto f_err;
2163 }
2164 if (s->tlsext_ocsp_resp)
2165 OPENSSL_free(s->tlsext_ocsp_resp);
2166 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2167 if (!s->tlsext_ocsp_resp) {
2168 al = SSL_AD_INTERNAL_ERROR;
2169 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE);
2170 goto f_err;
2171 }
2172 s->tlsext_ocsp_resplen = resplen;
2173 if (s->ctx->tlsext_status_cb) {
2174 int ret;
2175 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2176 if (ret == 0) {
2177 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2178 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_INVALID_STATUS_RESPONSE);
2179 goto f_err;
2180 }
2181 if (ret < 0) {
2182 al = SSL_AD_INTERNAL_ERROR;
2183 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE);
2184 goto f_err;
2185 }
2186 }
2187 return 1;
2188 f_err:
2189 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2190 return (-1);
2191}
6434abbf 2192#endif
d02b48c6 2193
36d16f8e 2194int ssl3_get_server_done(SSL *s)
10621efd
MC		 2195{
2196 int ok, ret = 0;
2197 long n;
2198
2199 /* Second to last param should be very small, like 0 :-) */
2200 n = s->method->ssl_get_message(s,
2201 SSL3_ST_CR_SRVR_DONE_A,
2202 SSL3_ST_CR_SRVR_DONE_B,
2203 SSL3_MT_SERVER_DONE, 30, &ok);
2204
2205 if (!ok)
2206 return ((int)n);
2207 if (n > 0) {
2208 /* should contain no data */
2209 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2210 SSLerr(SSL_F_SSL3_GET_SERVER_DONE, SSL_R_LENGTH_MISMATCH);
2211 return -1;
2212 }
2213 ret = 1;
2214 return (ret);
2215}
176f31dd 2216
36d16f8e 2217int ssl3_send_client_key_exchange(SSL *s)
10621efd
MC		 2218{
2219 unsigned char *p, *d;
2220 int n;
2221 unsigned long alg_k;
bc36ee62 2222#ifndef OPENSSL_NO_RSA
10621efd
MC		 2223 unsigned char *q;
2224 EVP_PKEY *pkey = NULL;
79df9d62 2225#endif
bc36ee62 2226#ifndef OPENSSL_NO_KRB5
10621efd
MC		 2227 KSSL_ERR kssl_err;
2228#endif /* OPENSSL_NO_KRB5 */
ea262260 2229#ifndef OPENSSL_NO_ECDH
10621efd
MC		 2230 EC_KEY *clnt_ecdh = NULL;
2231 const EC_POINT *srvr_ecpoint = NULL;
2232 EVP_PKEY *srvr_pub_pkey = NULL;
2233 unsigned char *encodedPoint = NULL;
2234 int encoded_pt_len = 0;
2235 BN_CTX *bn_ctx = NULL;
ea262260 2236#endif
d02b48c6 2237
10621efd
MC		 2238 if (s->state == SSL3_ST_CW_KEY_EXCH_A) {
2239 d = (unsigned char *)s->init_buf->data;
2240 p = &(d[4]);
d02b48c6 2241
10621efd 2242 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
d02b48c6 2243
10621efd
MC		 2244 /* Fool emacs indentation */
2245 if (0) {
2246 }
bc36ee62 2247#ifndef OPENSSL_NO_RSA
10621efd
MC		 2248 else if (alg_k & SSL_kRSA) {
2249 RSA *rsa;
2250 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2251
2252 if (s->session->sess_cert == NULL) {
2253 /*
2254 * We should always have a server certificate with SSL_kRSA.
2255 */
2256 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2257 ERR_R_INTERNAL_ERROR);
2258 goto err;
2259 }
2260
2261 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2262 rsa = s->session->sess_cert->peer_rsa_tmp;
2263 else {
2264 pkey =
2265 X509_get_pubkey(s->session->
2266 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].
2267 x509);
2268 if ((pkey == NULL) || (pkey->type != EVP_PKEY_RSA)
2269 || (pkey->pkey.rsa == NULL)) {
2270 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2271 ERR_R_INTERNAL_ERROR);
2272 goto err;
2273 }
2274 rsa = pkey->pkey.rsa;
2275 EVP_PKEY_free(pkey);
2276 }
2277
2278 tmp_buf[0] = s->client_version >> 8;
2279 tmp_buf[1] = s->client_version & 0xff;
2280 if (RAND_bytes(&(tmp_buf[2]), sizeof tmp_buf - 2) <= 0)
2281 goto err;
2282
2283 s->session->master_key_length = sizeof tmp_buf;
2284
2285 q = p;
2286 /* Fix buf for TLS and beyond */
2287 if (s->version > SSL3_VERSION)
2288 p += 2;
2289 n = RSA_public_encrypt(sizeof tmp_buf,
2290 tmp_buf, p, rsa, RSA_PKCS1_PADDING);
2291# ifdef PKCS1_CHECK
2292 if (s->options & SSL_OP_PKCS1_CHECK_1)
2293 p[1]++;
2294 if (s->options & SSL_OP_PKCS1_CHECK_2)
2295 tmp_buf[0] = 0x70;
2296# endif
2297 if (n <= 0) {
2298 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2299 SSL_R_BAD_RSA_ENCRYPT);
2300 goto err;
2301 }
2302
2303 /* Fix buf for TLS and beyond */
2304 if (s->version > SSL3_VERSION) {
2305 s2n(n, q);
2306 n += 2;
2307 }
2308
2309 s->session->master_key_length =
2310 s->method->ssl3_enc->generate_master_secret(s,
2311 s->
2312 session->master_key,
2313 tmp_buf,
2314 sizeof tmp_buf);
2315 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2316 }
f9b3bff6 2317#endif
bc36ee62 2318#ifndef OPENSSL_NO_KRB5
10621efd
MC		 2319 else if (alg_k & SSL_kKRB5) {
2320 krb5_error_code krb5rc;
2321 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2322 /* krb5_data krb5_ap_req; */
2323 krb5_data *enc_ticket;
2324 krb5_data authenticator, *authp = NULL;
2325 EVP_CIPHER_CTX ciph_ctx;
2326 const EVP_CIPHER *enc = NULL;
2327 unsigned char iv[EVP_MAX_IV_LENGTH];
2328 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2329 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH + EVP_MAX_IV_LENGTH];
2330 int padl, outl = sizeof(epms);
2331
2332 EVP_CIPHER_CTX_init(&ciph_ctx);
2333
2334# ifdef KSSL_DEBUG
2335 fprintf(stderr, "ssl3_send_client_key_exchange(%lx & %lx)\n",
2336 alg_k, SSL_kKRB5);
2337# endif /* KSSL_DEBUG */
2338
2339 authp = NULL;
2340# ifdef KRB5SENDAUTH
2341 if (KRB5SENDAUTH)
2342 authp = &authenticator;
2343# endif /* KRB5SENDAUTH */
2344
2345 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, &kssl_err);
2346 enc = kssl_map_enc(kssl_ctx->enctype);
2347 if (enc == NULL)
2348 goto err;
2349# ifdef KSSL_DEBUG
2350 {
2351 fprintf(stderr, "kssl_cget_tkt rtn %d\n", krb5rc);
2352 if (krb5rc && kssl_err.text)
2353 fprintf(stderr, "kssl_cget_tkt kssl_err=%s\n",
2354 kssl_err.text);
2355 }
2356# endif /* KSSL_DEBUG */
2357
2358 if (krb5rc) {
2359 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2360 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, kssl_err.reason);
2361 goto err;
2362 }
2363
cda8845d
MC		 2364 /*-
2365 * 20010406 VRS - Earlier versions used KRB5 AP_REQ
2366 * in place of RFC 2712 KerberosWrapper, as in:
2367 *
2368 * Send ticket (copy to *p, set n = length)
2369 * n = krb5_ap_req.length;
2370 * memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2371 * if (krb5_ap_req.data)
2372 * kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2373 *
2374 * Now using real RFC 2712 KerberosWrapper
2375 * (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2376 * Note: 2712 "opaque" types are here replaced
2377 * with a 2-byte length followed by the value.
2378 * Example:
2379 * KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2380 * Where "xx xx" = length bytes. Shown here with
2381 * optional authenticator omitted.
2382 */
10621efd
MC		 2383
2384 /* KerberosWrapper.Ticket */
2385 s2n(enc_ticket->length, p);
2386 memcpy(p, enc_ticket->data, enc_ticket->length);
2387 p += enc_ticket->length;
2388 n = enc_ticket->length + 2;
2389
2390 /* KerberosWrapper.Authenticator */
2391 if (authp && authp->length) {
2392 s2n(authp->length, p);
2393 memcpy(p, authp->data, authp->length);
2394 p += authp->length;
2395 n += authp->length + 2;
2396
2397 free(authp->data);
2398 authp->data = NULL;
2399 authp->length = 0;
2400 } else {
2401 s2n(0, p); /* null authenticator length */
2402 n += 2;
2403 }
2404
2405 tmp_buf[0] = s->client_version >> 8;
2406 tmp_buf[1] = s->client_version & 0xff;
2407 if (RAND_bytes(&(tmp_buf[2]), sizeof tmp_buf - 2) <= 0)
2408 goto err;
2409
cda8845d
MC		 2410 /*-
2411 * 20010420 VRS. Tried it this way; failed.
2412 * EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2413 * EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2414 * kssl_ctx->length);
2415 * EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2416 */
10621efd
MC		 2417
2418 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2419 EVP_EncryptInit_ex(&ciph_ctx, enc, NULL, kssl_ctx->key, iv);
2420 EVP_EncryptUpdate(&ciph_ctx, epms, &outl, tmp_buf,
2421 sizeof tmp_buf);
2422 EVP_EncryptFinal_ex(&ciph_ctx, &(epms[outl]), &padl);
2423 outl += padl;
2424 if (outl > (int)sizeof epms) {
2425 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2426 ERR_R_INTERNAL_ERROR);
2427 goto err;
2428 }
2429 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2430
2431 /* KerberosWrapper.EncryptedPreMasterSecret */
2432 s2n(outl, p);
2433 memcpy(p, epms, outl);
2434 p += outl;
2435 n += outl + 2;
2436
2437 s->session->master_key_length =
2438 s->method->ssl3_enc->generate_master_secret(s,
2439 s->
2440 session->master_key,
2441 tmp_buf,
2442 sizeof tmp_buf);
2443
2444 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2445 OPENSSL_cleanse(epms, outl);
2446 }
d02b48c6 2447#endif
bc36ee62 2448#ifndef OPENSSL_NO_DH
10621efd
MC		 2449 else if (alg_k & (SSL_kEDH | SSL_kDHr | SSL_kDHd)) {
2450 DH *dh_srvr, *dh_clnt;
2451
2452 if (s->session->sess_cert == NULL) {
2453 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
2454 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2455 SSL_R_UNEXPECTED_MESSAGE);
2456 goto err;
2457 }
2458
2459 if (s->session->sess_cert->peer_dh_tmp != NULL)
2460 dh_srvr = s->session->sess_cert->peer_dh_tmp;
2461 else {
2462 /* we get them from the cert */
2463 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2464 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2465 SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
2466 goto err;
2467 }
2468
2469 /* generate a new random key */
2470 if ((dh_clnt = DHparams_dup(dh_srvr)) == NULL) {
2471 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
2472 goto err;
2473 }
2474 if (!DH_generate_key(dh_clnt)) {
2475 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
2476 DH_free(dh_clnt);
2477 goto err;
2478 }
2479
2480 /*
2481 * use the 'p' output buffer for the DH key, but make sure to
2482 * clear it out afterwards
2483 */
2484
2485 n = DH_compute_key(p, dh_srvr->pub_key, dh_clnt);
2486
2487 if (n <= 0) {
2488 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
2489 DH_free(dh_clnt);
2490 goto err;
2491 }
2492
2493 /* generate master key from the result */
2494 s->session->master_key_length =
2495 s->method->ssl3_enc->generate_master_secret(s,
2496 s->
2497 session->master_key,
2498 p, n);
2499 /* clean up */
2500 memset(p, 0, n);
2501
2502 /* send off the data */
2503 n = BN_num_bytes(dh_clnt->pub_key);
2504 s2n(n, p);
2505 BN_bn2bin(dh_clnt->pub_key, p);
2506 n += 2;
2507
2508 DH_free(dh_clnt);
2509
2510 /* perhaps clean things up a bit EAY EAY EAY EAY */
2511 }
d02b48c6 2512#endif
ea262260 2513
10621efd
MC		 2514#ifndef OPENSSL_NO_ECDH
2515 else if (alg_k & (SSL_kEECDH | SSL_kECDHr | SSL_kECDHe)) {
2516 const EC_GROUP *srvr_group = NULL;
2517 EC_KEY *tkey;
2518 int ecdh_clnt_cert = 0;
2519 int field_size = 0;
2520
2521 if (s->session->sess_cert == NULL) {
2522 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
2523 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2524 SSL_R_UNEXPECTED_MESSAGE);
2525 goto err;
2526 }
2527
2528 /*
2529 * Did we send out the client's ECDH share for use in premaster
2530 * computation as part of client certificate? If so, set
2531 * ecdh_clnt_cert to 1.
2532 */
2533 if ((alg_k & (SSL_kECDHr | SSL_kECDHe)) && (s->cert != NULL)) {
cda8845d
MC		 2534 /*-
2535 * XXX: For now, we do not support client
2536 * authentication using ECDH certificates.
2537 * To add such support, one needs to add
2538 * code that checks for appropriate
2539 * conditions and sets ecdh_clnt_cert to 1.
2540 * For example, the cert have an ECC
2541 * key on the same curve as the server's
2542 * and the key should be authorized for
2543 * key agreement.
2544 *
2545 * One also needs to add code in ssl3_connect
2546 * to skip sending the certificate verify
2547 * message.
2548 *
2549 * if ((s->cert->key->privatekey != NULL) &&
2550 * (s->cert->key->privatekey->type ==
2551 * EVP_PKEY_EC) && ...)
2552 * ecdh_clnt_cert = 1;
2553 */
10621efd
MC		 2554 }
2555
2556 if (s->session->sess_cert->peer_ecdh_tmp != NULL) {
2557 tkey = s->session->sess_cert->peer_ecdh_tmp;
2558 } else {
2559 /* Get the Server Public Key from Cert */
2560 srvr_pub_pkey =
2561 X509_get_pubkey(s->session->
2562 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2563 if ((srvr_pub_pkey == NULL)
2564 || (srvr_pub_pkey->type != EVP_PKEY_EC)
2565 || (srvr_pub_pkey->pkey.ec == NULL)) {
2566 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2567 ERR_R_INTERNAL_ERROR);
2568 goto err;
2569 }
2570
2571 tkey = srvr_pub_pkey->pkey.ec;
2572 }
2573
2574 srvr_group = EC_KEY_get0_group(tkey);
2575 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2576
2577 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) {
2578 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2579 ERR_R_INTERNAL_ERROR);
2580 goto err;
2581 }
2582
2583 if ((clnt_ecdh = EC_KEY_new()) == NULL) {
2584 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2585 ERR_R_MALLOC_FAILURE);
2586 goto err;
2587 }
2588
2589 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) {
2590 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
2591 goto err;
2592 }
2593 if (ecdh_clnt_cert) {
2594 /*
2595 * Reuse key info from our certificate We only need our
2596 * private key to perform the ECDH computation.
2597 */
2598 const BIGNUM *priv_key;
2599 tkey = s->cert->key->privatekey->pkey.ec;
2600 priv_key = EC_KEY_get0_private_key(tkey);
2601 if (priv_key == NULL) {
2602 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2603 ERR_R_MALLOC_FAILURE);
2604 goto err;
2605 }
2606 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) {
2607 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
2608 goto err;
2609 }
2610 } else {
2611 /* Generate a new ECDH key pair */
2612 if (!(EC_KEY_generate_key(clnt_ecdh))) {
2613 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2614 ERR_R_ECDH_LIB);
2615 goto err;
2616 }
2617 }
2618
2619 /*
2620 * use the 'p' output buffer for the ECDH key, but make sure to
2621 * clear it out afterwards
2622 */
2623
2624 field_size = EC_GROUP_get_degree(srvr_group);
2625 if (field_size <= 0) {
2626 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2627 goto err;
2628 }
2629 n = ECDH_compute_key(p, (field_size + 7) / 8, srvr_ecpoint,
2630 clnt_ecdh, NULL);
2631 if (n <= 0) {
2632 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2633 goto err;
2634 }
2635
2636 /* generate master key from the result */
2637 s->session->master_key_length =
2638 s->method->ssl3_enc->generate_master_secret(s,
2639 s->
2640 session->master_key,
2641 p, n);
2642
2643 memset(p, 0, n); /* clean up */
2644
2645 if (ecdh_clnt_cert) {
2646 /* Send empty client key exch message */
2647 n = 0;
2648 } else {
2649 /*
2650 * First check the size of encoding and allocate memory
2651 * accordingly.
2652 */
2653 encoded_pt_len =
2654 EC_POINT_point2oct(srvr_group,
2655 EC_KEY_get0_public_key(clnt_ecdh),
2656 POINT_CONVERSION_UNCOMPRESSED,
2657 NULL, 0, NULL);
2658
2659 encodedPoint = (unsigned char *)
2660 OPENSSL_malloc(encoded_pt_len * sizeof(unsigned char));
2661 bn_ctx = BN_CTX_new();
2662 if ((encodedPoint == NULL) || (bn_ctx == NULL)) {
2663 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2664 ERR_R_MALLOC_FAILURE);
2665 goto err;
2666 }
2667
2668 /* Encode the public key */
2669 n = EC_POINT_point2oct(srvr_group,
2670 EC_KEY_get0_public_key(clnt_ecdh),
2671 POINT_CONVERSION_UNCOMPRESSED,
2672 encodedPoint, encoded_pt_len, bn_ctx);
2673
2674 *p = n; /* length of encoded point */
2675 /* Encoded point will be copied here */
2676 p += 1;
2677 /* copy the point */
2678 memcpy((unsigned char *)p, encodedPoint, n);
2679 /* increment n to account for length field */
2680 n += 1;
2681 }
2682
2683 /* Free allocated memory */
2684 BN_CTX_free(bn_ctx);
2685 if (encodedPoint != NULL)
2686 OPENSSL_free(encodedPoint);
2687 if (clnt_ecdh != NULL)
2688 EC_KEY_free(clnt_ecdh);
2689 EVP_PKEY_free(srvr_pub_pkey);
2690 }
2691#endif /* !OPENSSL_NO_ECDH */
2692 else if (alg_k & SSL_kGOST) {
2693 /* GOST key exchange message creation */
2694 EVP_PKEY_CTX *pkey_ctx;
2695 X509 *peer_cert;
2696 size_t msglen;
2697 unsigned int md_len;
2698 int keytype;
2699 unsigned char premaster_secret[32], shared_ukm[32], tmp[256];
2700 EVP_MD_CTX *ukm_hash;
2701 EVP_PKEY *pub_key;
2702
2703 /*
2704 * Get server sertificate PKEY and create ctx from it
2705 */
2706 peer_cert =
2707 s->session->
2708 sess_cert->peer_pkeys[(keytype = SSL_PKEY_GOST01)].x509;
2709 if (!peer_cert)
2710 peer_cert =
2711 s->session->
2712 sess_cert->peer_pkeys[(keytype = SSL_PKEY_GOST94)].x509;
2713 if (!peer_cert) {
2714 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2715 SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2716 goto err;
2717 }
2718
2719 pkey_ctx = EVP_PKEY_CTX_new(pub_key =
2720 X509_get_pubkey(peer_cert), NULL);
2721 /*
2722 * If we have send a certificate, and certificate key
2723 *
2724 * * parameters match those of server certificate, use
2725 * certificate key for key exchange
2726 */
2727
2728 /* Otherwise, generate ephemeral key pair */
2729
2730 EVP_PKEY_encrypt_init(pkey_ctx);
2731 /* Generate session key */
2732 RAND_bytes(premaster_secret, 32);
2733 /*
2734 * If we have client certificate, use its secret as peer key
2735 */
2736 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2737 if (EVP_PKEY_derive_set_peer
2738 (pkey_ctx, s->cert->key->privatekey) <= 0) {
2739 /*
2740 * If there was an error - just ignore it. Ephemeral key
2741 * * would be used
2742 */
2743 ERR_clear_error();
2744 }
2745 }
2746 /*
2747 * Compute shared IV and store it in algorithm-specific context
2748 * data
2749 */
2750 ukm_hash = EVP_MD_CTX_create();
2751 EVP_DigestInit(ukm_hash,
2752 EVP_get_digestbynid(NID_id_GostR3411_94));
2753 EVP_DigestUpdate(ukm_hash, s->s3->client_random,
2754 SSL3_RANDOM_SIZE);
2755 EVP_DigestUpdate(ukm_hash, s->s3->server_random,
2756 SSL3_RANDOM_SIZE);
2757 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2758 EVP_MD_CTX_destroy(ukm_hash);
2759 if (EVP_PKEY_CTX_ctrl
2760 (pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, EVP_PKEY_CTRL_SET_IV, 8,
2761 shared_ukm) < 0) {
2762 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2763 SSL_R_LIBRARY_BUG);
2764 goto err;
2765 }
2766 /* Make GOST keytransport blob message */
2767 /*
2768 * Encapsulate it into sequence
2769 */
2770 *(p++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2771 msglen = 255;
2772 if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, premaster_secret, 32)
2773 < 0) {
2774 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2775 SSL_R_LIBRARY_BUG);
2776 goto err;
2777 }
2778 if (msglen >= 0x80) {
2779 *(p++) = 0x81;
2780 *(p++) = msglen & 0xff;
2781 n = msglen + 3;
2782 } else {
2783 *(p++) = msglen & 0xff;
2784 n = msglen + 2;
2785 }
2786 memcpy(p, tmp, msglen);
2787 /* Check if pubkey from client certificate was used */
2788 if (EVP_PKEY_CTX_ctrl
2789 (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) {
2790 /* Set flag "skip certificate verify" */
2791 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2792 }
2793 EVP_PKEY_CTX_free(pkey_ctx);
2794 s->session->master_key_length =
2795 s->method->ssl3_enc->generate_master_secret(s,
2796 s->
2797 session->master_key,
2798 premaster_secret,
2799 32);
2800 EVP_PKEY_free(pub_key);
2801
2802 }
a149b246 2803#ifndef OPENSSL_NO_SRP
10621efd
MC		 2804 else if (alg_k & SSL_kSRP) {
2805 if (s->srp_ctx.A != NULL) {
2806 /* send off the data */
2807 n = BN_num_bytes(s->srp_ctx.A);
2808 s2n(n, p);
2809 BN_bn2bin(s->srp_ctx.A, p);
2810 n += 2;
2811 } else {
2812 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2813 ERR_R_INTERNAL_ERROR);
2814 goto err;
2815 }
2816 if (s->session->srp_username != NULL)
2817 OPENSSL_free(s->session->srp_username);
2818 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2819 if (s->session->srp_username == NULL) {
2820 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2821 ERR_R_MALLOC_FAILURE);
2822 goto err;
2823 }
2824
2825 if ((s->session->master_key_length =
2826 SRP_generate_client_master_secret(s,
2827 s->session->master_key)) <
2828 0) {
2829 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2830 ERR_R_INTERNAL_ERROR);
2831 goto err;
2832 }
2833 }
a149b246 2834#endif
ddac1974 2835#ifndef OPENSSL_NO_PSK
10621efd
MC		 2836 else if (alg_k & SSL_kPSK) {
2837 /*
2838 * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a
2839 * \0-terminated identity. The last byte is for us for simulating
2840 * strnlen.
2841 */
2842 char identity[PSK_MAX_IDENTITY_LEN + 2];
2843 size_t identity_len;
2844 unsigned char *t = NULL;
2845 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN * 2 + 4];
2846 unsigned int pre_ms_len = 0, psk_len = 0;
2847 int psk_err = 1;
2848
2849 n = 0;
2850 if (s->psk_client_callback == NULL) {
2851 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2852 SSL_R_PSK_NO_CLIENT_CB);
2853 goto err;
2854 }
2855
2856 memset(identity, 0, sizeof(identity));
2857 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
2858 identity, sizeof(identity) - 1,
2859 psk_or_pre_ms,
2860 sizeof(psk_or_pre_ms));
2861 if (psk_len > PSK_MAX_PSK_LEN) {
2862 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2863 ERR_R_INTERNAL_ERROR);
2864 goto psk_err;
2865 } else if (psk_len == 0) {
2866 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2867 SSL_R_PSK_IDENTITY_NOT_FOUND);
2868 goto psk_err;
2869 }
2870 identity[PSK_MAX_IDENTITY_LEN + 1] = '\0';
2871 identity_len = strlen(identity);
2872 if (identity_len > PSK_MAX_IDENTITY_LEN) {
2873 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2874 ERR_R_INTERNAL_ERROR);
2875 goto psk_err;
2876 }
2877 /* create PSK pre_master_secret */
2878 pre_ms_len = 2 + psk_len + 2 + psk_len;
2879 t = psk_or_pre_ms;
2880 memmove(psk_or_pre_ms + psk_len + 4, psk_or_pre_ms, psk_len);
2881 s2n(psk_len, t);
2882 memset(t, 0, psk_len);
2883 t += psk_len;
2884 s2n(psk_len, t);
2885
2886 if (s->session->psk_identity_hint != NULL)
2887 OPENSSL_free(s->session->psk_identity_hint);
2888 s->session->psk_identity_hint =
2889 BUF_strdup(s->ctx->psk_identity_hint);
2890 if (s->ctx->psk_identity_hint != NULL
2891 && s->session->psk_identity_hint == NULL) {
2892 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2893 ERR_R_MALLOC_FAILURE);
2894 goto psk_err;
2895 }
2896
2897 if (s->session->psk_identity != NULL)
2898 OPENSSL_free(s->session->psk_identity);
2899 s->session->psk_identity = BUF_strdup(identity);
2900 if (s->session->psk_identity == NULL) {
2901 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2902 ERR_R_MALLOC_FAILURE);
2903 goto psk_err;
2904 }
2905
2906 s->session->master_key_length =
2907 s->method->ssl3_enc->generate_master_secret(s,
2908 s->
2909 session->master_key,
2910 psk_or_pre_ms,
2911 pre_ms_len);
2912 s2n(identity_len, p);
2913 memcpy(p, identity, identity_len);
2914 n = 2 + identity_len;
2915 psk_err = 0;
2916 psk_err:
2917 OPENSSL_cleanse(identity, sizeof(identity));
2918 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
2919 if (psk_err != 0) {
2920 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2921 goto err;
2922 }
2923 }
ddac1974 2924#endif
10621efd
MC		 2925 else {
2926 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2927 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2928 goto err;
2929 }
2930
2931 *(d++) = SSL3_MT_CLIENT_KEY_EXCHANGE;
2932 l2n3(n, d);
2933
2934 s->state = SSL3_ST_CW_KEY_EXCH_B;
2935 /* number of bytes to write */
2936 s->init_num = n + 4;
2937 s->init_off = 0;
2938 }
2939
2940 /* SSL3_ST_CW_KEY_EXCH_B */
2941 return (ssl3_do_write(s, SSL3_RT_HANDSHAKE));
2942 err:
ea262260 2943#ifndef OPENSSL_NO_ECDH
10621efd
MC		 2944 BN_CTX_free(bn_ctx);
2945 if (encodedPoint != NULL)
2946 OPENSSL_free(encodedPoint);
2947 if (clnt_ecdh != NULL)
2948 EC_KEY_free(clnt_ecdh);
2949 EVP_PKEY_free(srvr_pub_pkey);
2950#endif
2951 return (-1);
2952}
d02b48c6 2953
36d16f8e 2954int ssl3_send_client_verify(SSL *s)
10621efd
MC		 2955{
2956 unsigned char *p, *d;
2957 unsigned char data[MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH];
2958 EVP_PKEY *pkey;
2959 EVP_PKEY_CTX *pctx = NULL;
2960 EVP_MD_CTX mctx;
2961 unsigned u = 0;
2962 unsigned long n;
2963 int j;
2964
2965 EVP_MD_CTX_init(&mctx);
2966
2967 if (s->state == SSL3_ST_CW_CERT_VRFY_A) {
2968 d = (unsigned char *)s->init_buf->data;
2969 p = &(d[4]);
2970 pkey = s->cert->key->privatekey;
0e1dba93 2971/* Create context from key and test if sha1 is allowed as digest */
10621efd
MC		 2972 pctx = EVP_PKEY_CTX_new(pkey, NULL);
2973 EVP_PKEY_sign_init(pctx);
2974 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1()) > 0) {
2975 if (TLS1_get_version(s) < TLS1_2_VERSION)
2976 s->method->ssl3_enc->cert_verify_mac(s,
2977 NID_sha1,
2978 &(data
2979 [MD5_DIGEST_LENGTH]));
2980 } else {
2981 ERR_clear_error();
2982 }
2983 /*
2984 * For TLS v1.2 send signature algorithm and signature using agreed
2985 * digest and cached handshake records.
2986 */
2987 if (TLS1_get_version(s) >= TLS1_2_VERSION) {
2988 long hdatalen = 0;
2989 void *hdata;
2990 const EVP_MD *md = s->cert->key->digest;
2991 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
2992 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) {
2993 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2994 goto err;
2995 }
2996 p += 2;
4fe4c00e 2997#ifdef SSL_DEBUG
10621efd
MC		 2998 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
2999 EVP_MD_name(md));
3000#endif
3001 if (!EVP_SignInit_ex(&mctx, md, NULL)
3002 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3003 || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) {
3004 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_EVP_LIB);
3005 goto err;
3006 }
3007 s2n(u, p);
3008 n = u + 4;
3009 if (!ssl3_digest_cached_records(s))
3010 goto err;
3011 } else
bc36ee62 3012#ifndef OPENSSL_NO_RSA
10621efd
MC		 3013 if (pkey->type == EVP_PKEY_RSA) {
3014 s->method->ssl3_enc->cert_verify_mac(s, NID_md5, &(data[0]));
3015 if (RSA_sign(NID_md5_sha1, data,
3016 MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH,
3017 &(p[2]), &u, pkey->pkey.rsa) <= 0) {
3018 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_RSA_LIB);
3019 goto err;
3020 }
3021 s2n(u, p);
3022 n = u + 2;
3023 } else
d02b48c6 3024#endif
bc36ee62 3025#ifndef OPENSSL_NO_DSA
10621efd
MC		 3026 if (pkey->type == EVP_PKEY_DSA) {
3027 if (!DSA_sign(pkey->save_type,
3028 &(data[MD5_DIGEST_LENGTH]),
3029 SHA_DIGEST_LENGTH, &(p[2]),
3030 (unsigned int *)&j, pkey->pkey.dsa)) {
3031 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_DSA_LIB);
3032 goto err;
3033 }
3034 s2n(j, p);
3035 n = j + 2;
3036 } else
ea262260
BM		 3037#endif
3038#ifndef OPENSSL_NO_ECDSA
10621efd
MC		 3039 if (pkey->type == EVP_PKEY_EC) {
3040 if (!ECDSA_sign(pkey->save_type,
3041 &(data[MD5_DIGEST_LENGTH]),
3042 SHA_DIGEST_LENGTH, &(p[2]),
3043 (unsigned int *)&j, pkey->pkey.ec)) {
3044 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_ECDSA_LIB);
3045 goto err;
3046 }
3047 s2n(j, p);
3048 n = j + 2;
3049 } else
3050#endif
3051 if (pkey->type == NID_id_GostR3410_94
3052 || pkey->type == NID_id_GostR3410_2001) {
3053 unsigned char signbuf[64];
3054 int i;
3055 size_t sigsize = 64;
3056 s->method->ssl3_enc->cert_verify_mac(s,
3057 NID_id_GostR3411_94, data);
3058 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3059 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
3060 goto err;
3061 }
3062 for (i = 63, j = 0; i >= 0; j++, i--) {
3063 p[2 + j] = signbuf[i];
3064 }
3065 s2n(j, p);
3066 n = j + 2;
3067 } else {
3068 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
3069 goto err;
3070 }
3071 *(d++) = SSL3_MT_CERTIFICATE_VERIFY;
3072 l2n3(n, d);
3073
3074 s->state = SSL3_ST_CW_CERT_VRFY_B;
3075 s->init_num = (int)n + 4;
3076 s->init_off = 0;
3077 }
3078 EVP_MD_CTX_cleanup(&mctx);
3079 EVP_PKEY_CTX_free(pctx);
3080 return (ssl3_do_write(s, SSL3_RT_HANDSHAKE));
3081 err:
3082 EVP_MD_CTX_cleanup(&mctx);
3083 EVP_PKEY_CTX_free(pctx);
3084 return (-1);
3085}
d02b48c6 3086
36d16f8e 3087int ssl3_send_client_certificate(SSL *s)
10621efd
MC		 3088{
3089 X509 *x509 = NULL;
3090 EVP_PKEY *pkey = NULL;
3091 int i;
3092 unsigned long l;
3093
3094 if (s->state == SSL3_ST_CW_CERT_A) {
3095 if ((s->cert == NULL) ||
3096 (s->cert->key->x509 == NULL) ||
3097 (s->cert->key->privatekey == NULL))
3098 s->state = SSL3_ST_CW_CERT_B;
3099 else
3100 s->state = SSL3_ST_CW_CERT_C;
3101 }
3102
3103 /* We need to get a client cert */
3104 if (s->state == SSL3_ST_CW_CERT_B) {
3105 /*
3106 * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP;
3107 * return(-1); We then get retied later
3108 */
3109 i = 0;
3110 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3111 if (i < 0) {
3112 s->rwstate = SSL_X509_LOOKUP;
3113 return (-1);
3114 }
3115 s->rwstate = SSL_NOTHING;
3116 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) {
3117 s->state = SSL3_ST_CW_CERT_B;
3118 if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey))
3119 i = 0;
3120 } else if (i == 1) {
3121 i = 0;
3122 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,
3123 SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3124 }
3125
3126 if (x509 != NULL)
3127 X509_free(x509);
3128 if (pkey != NULL)
3129 EVP_PKEY_free(pkey);
3130 if (i == 0) {
3131 if (s->version == SSL3_VERSION) {
3132 s->s3->tmp.cert_req = 0;
3133 ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE);
3134 return (1);
3135 } else {
3136 s->s3->tmp.cert_req = 2;
3137 }
3138 }
3139
3140 /* Ok, we have a cert */
3141 s->state = SSL3_ST_CW_CERT_C;
3142 }
3143
3144 if (s->state == SSL3_ST_CW_CERT_C) {
3145 s->state = SSL3_ST_CW_CERT_D;
3146 l = ssl3_output_cert_chain(s,
3147 (s->s3->tmp.cert_req ==
3148 2) ? NULL : s->cert->key->x509);
3149 if (!l) {
3150 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
3151 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
3152 return 0;
3153 }
3154 s->init_num = (int)l;
3155 s->init_off = 0;
3156 }
3157 /* SSL3_ST_CW_CERT_D */
3158 return (ssl3_do_write(s, SSL3_RT_HANDSHAKE));
3159}
3160
3161#define has_bits(i,m) (((i)&(m)) == (m))
d02b48c6 3162
36d16f8e 3163int ssl3_check_cert_and_algorithm(SSL *s)
10621efd
MC		 3164{
3165 int i, idx;
3166 long alg_k, alg_a;
3167 EVP_PKEY *pkey = NULL;
3168 SESS_CERT *sc;
bc36ee62 3169#ifndef OPENSSL_NO_RSA
10621efd 3170 RSA *rsa;
79df9d62 3171#endif
bc36ee62 3172#ifndef OPENSSL_NO_DH
10621efd 3173 DH *dh;
79df9d62 3174#endif
d02b48c6 3175
10621efd
MC		 3176 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
3177 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
d02b48c6 3178
10621efd
MC		 3179 /* we don't have a certificate */
3180 if ((alg_a & (SSL_aDH | SSL_aNULL | SSL_aKRB5)) || (alg_k & SSL_kPSK))
3181 return (1);
fbe2c6b3 3182
10621efd
MC		 3183 sc = s->session->sess_cert;
3184 if (sc == NULL) {
3185 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
3186 goto err;
3187 }
bc36ee62 3188#ifndef OPENSSL_NO_RSA
10621efd 3189 rsa = s->session->sess_cert->peer_rsa_tmp;
79df9d62 3190#endif
bc36ee62 3191#ifndef OPENSSL_NO_DH
10621efd 3192 dh = s->session->sess_cert->peer_dh_tmp;
79df9d62 3193#endif
d02b48c6 3194
10621efd 3195 /* This is the passed certificate */
d02b48c6 3196
10621efd 3197 idx = sc->peer_cert_type;
ea262260 3198#ifndef OPENSSL_NO_ECDH
10621efd
MC		 3199 if (idx == SSL_PKEY_ECC) {
3200 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, s) == 0) {
3201 /* check failed */
3202 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT);
3203 goto f_err;
3204 } else {
3205 return 1;
3206 }
3207 }
3208#endif
3209 pkey = X509_get_pubkey(sc->peer_pkeys[idx].x509);
3210 i = X509_certificate_type(sc->peer_pkeys[idx].x509, pkey);
3211 EVP_PKEY_free(pkey);
3212
3213 /* Check that we have a certificate if we require one */
3214 if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) {
3215 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3216 SSL_R_MISSING_RSA_SIGNING_CERT);
3217 goto f_err;
3218 }
bc36ee62 3219#ifndef OPENSSL_NO_DSA
10621efd
MC		 3220 else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) {
3221 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3222 SSL_R_MISSING_DSA_SIGNING_CERT);
3223 goto f_err;
3224 }
d02b48c6 3225#endif
bc36ee62 3226#ifndef OPENSSL_NO_RSA
10621efd
MC		 3227 if ((alg_k & SSL_kRSA) &&
3228 !(has_bits(i, EVP_PK_RSA | EVP_PKT_ENC) || (rsa != NULL))) {
3229 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3230 SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3231 goto f_err;
3232 }
79df9d62 3233#endif
bc36ee62 3234#ifndef OPENSSL_NO_DH
10621efd
MC		 3235 if ((alg_k & SSL_kEDH) &&
3236 !(has_bits(i, EVP_PK_DH | EVP_PKT_EXCH) || (dh != NULL))) {
3237 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_DH_KEY);
3238 goto f_err;
3239 } else if ((alg_k & SSL_kDHr) && !has_bits(i, EVP_PK_DH | EVP_PKS_RSA)) {
3240 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3241 SSL_R_MISSING_DH_RSA_CERT);
3242 goto f_err;
3243 }
3244# ifndef OPENSSL_NO_DSA
3245 else if ((alg_k & SSL_kDHd) && !has_bits(i, EVP_PK_DH | EVP_PKS_DSA)) {
3246 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3247 SSL_R_MISSING_DH_DSA_CERT);
3248 goto f_err;
3249 }
3250# endif
3251#endif
3252
3253 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i, EVP_PKT_EXP)) {
bc36ee62 3254#ifndef OPENSSL_NO_RSA
10621efd
MC		 3255 if (alg_k & SSL_kRSA) {
3256 if (rsa == NULL
3257 || RSA_size(rsa) * 8 >
3258 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
3259 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3260 SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3261 goto f_err;
3262 }
3263 } else
d02b48c6 3264#endif
bc36ee62 3265#ifndef OPENSSL_NO_DH
10621efd
MC		 3266 if (alg_k & (SSL_kEDH | SSL_kDHr | SSL_kDHd)) {
3267 if (dh == NULL
3268 || DH_size(dh) * 8 >
3269 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
3270 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3271 SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3272 goto f_err;
3273 }
3274 } else
3275#endif
3276 {
3277 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3278 SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3279 goto f_err;
3280 }
3281 }
3282 return (1);
3283 f_err:
3284 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
3285 err:
3286 return (0);
3287}
6434abbf 3288
68b33cc5
BL		 3289#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
3290int ssl3_send_next_proto(SSL *s)
10621efd
MC		 3291{
3292 unsigned int len, padding_len;
3293 unsigned char *d;
3294
3295 if (s->state == SSL3_ST_CW_NEXT_PROTO_A) {
3296 len = s->next_proto_negotiated_len;
3297 padding_len = 32 - ((len + 2) % 32);
3298 d = (unsigned char *)s->init_buf->data;
3299 d[4] = len;
3300 memcpy(d + 5, s->next_proto_negotiated, len);
3301 d[5 + len] = padding_len;
3302 memset(d + 6 + len, 0, padding_len);
3303 *(d++) = SSL3_MT_NEXT_PROTO;
3304 l2n3(2 + len + padding_len, d);
3305 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3306 s->init_num = 4 + 2 + len + padding_len;
3307 s->init_off = 0;
3308 }
3309
3310 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3311}
3312#endif /* !OPENSSL_NO_TLSEXT &&
3313 * !OPENSSL_NO_NEXTPROTONEG */
68b33cc5 3314
368888bc 3315int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
10621efd
MC		 3316{
3317 int i = 0;
368888bc 3318#ifndef OPENSSL_NO_ENGINE
10621efd
MC		 3319 if (s->ctx->client_cert_engine) {
3320 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3321 SSL_get_client_CA_list(s),
3322 px509, ppkey, NULL, NULL, NULL);
3323 if (i != 0)
3324 return i;
3325 }
3326#endif
3327 if (s->ctx->client_cert_cb)
3328 i = s->ctx->client_cert_cb(s, px509, ppkey);
3329 return i;
3330}
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