]> git.ipfire.org Git - thirdparty/openssl.git/blame - ssl/s3_clnt.c
projects / thirdparty / openssl.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
apps return value checks
[thirdparty/openssl.git] / ssl / s3_clnt.c
CommitLineData
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.
0f113f3e 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).
0f113f3e 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.
0f113f3e 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 :-).
0f113f3e 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)"
0f113f3e 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.
0f113f3e 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
0f113f3e 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 *
0f113f3e 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>
3eeaab4b 159#ifndef OPENSSL_NO_DH
0f113f3e 160# include <openssl/dh.h>
3eeaab4b 161#endif
d095b68d 162#include <openssl/bn.h>
368888bc 163#ifndef OPENSSL_NO_ENGINE
0f113f3e 164# include <openssl/engine.h>
368888bc 165#endif
f9b3bff6 166
0f113f3e 167static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b);
ea262260 168
3881d810 169#ifndef OPENSSL_NO_SSL3_METHOD
4ebb342f 170static const SSL_METHOD *ssl3_get_client_method(int ver)
0f113f3e
MC		 171{
172 if (ver == SSL3_VERSION)
173 return (SSLv3_client_method());
174 else
175 return (NULL);
176}
d02b48c6 177
f3b656b2 178IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
0f113f3e
MC		 179 ssl_undefined_function,
180 ssl3_connect, ssl3_get_client_method)
3881d810 181#endif
6b691a5c 182int ssl3_connect(SSL *s)
0f113f3e
MC		 183{
184 BUF_MEM *buf = NULL;
185 unsigned long Time = (unsigned long)time(NULL);
186 void (*cb) (const SSL *ssl, int type, int val) = NULL;
187 int ret = -1;
188 int new_state, state, skip = 0;
d02b48c6 189
0f113f3e
MC		 190 RAND_add(&Time, sizeof(Time), 0);
191 ERR_clear_error();
192 clear_sys_error();
4817504d 193
0f113f3e
MC		 194 if (s->info_callback != NULL)
195 cb = s->info_callback;
196 else if (s->ctx->info_callback != NULL)
197 cb = s->ctx->info_callback;
198
199 s->in_handshake++;
69f68237
MC		 200 if (!SSL_in_init(s) || SSL_in_before(s)) {
201 if(!SSL_clear(s))
202 return -1;
203 }
0f113f3e
MC		 204
205#ifndef OPENSSL_NO_HEARTBEATS
206 /*
207 * If we're awaiting a HeartbeatResponse, pretend we already got and
208 * don't await it anymore, because Heartbeats don't make sense during
209 * handshakes anyway.
210 */
211 if (s->tlsext_hb_pending) {
212 s->tlsext_hb_pending = 0;
213 s->tlsext_hb_seq++;
214 }
215#endif
216
217 for (;;) {
218 state = s->state;
219
220 switch (s->state) {
221 case SSL_ST_RENEGOTIATE:
222 s->renegotiate = 1;
223 s->state = SSL_ST_CONNECT;
224 s->ctx->stats.sess_connect_renegotiate++;
225 /* break */
226 case SSL_ST_BEFORE:
227 case SSL_ST_CONNECT:
228 case SSL_ST_BEFORE | SSL_ST_CONNECT:
229 case SSL_ST_OK | SSL_ST_CONNECT:
230
231 s->server = 0;
232 if (cb != NULL)
233 cb(s, SSL_CB_HANDSHAKE_START, 1);
234
235 if ((s->version & 0xff00) != 0x0300) {
236 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
237 ret = -1;
238 goto end;
239 }
240
241 if (!ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL)) {
242 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_VERSION_TOO_LOW);
243 return -1;
244 }
245
246 /* s->version=SSL3_VERSION; */
247 s->type = SSL_ST_CONNECT;
248
249 if (s->init_buf == NULL) {
250 if ((buf = BUF_MEM_new()) == NULL) {
251 ret = -1;
252 goto end;
253 }
254 if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) {
255 ret = -1;
256 goto end;
257 }
258 s->init_buf = buf;
259 buf = NULL;
260 }
261
262 if (!ssl3_setup_buffers(s)) {
263 ret = -1;
264 goto end;
265 }
266
267 /* setup buffing BIO */
268 if (!ssl_init_wbio_buffer(s, 0)) {
269 ret = -1;
270 goto end;
271 }
272
273 /* don't push the buffering BIO quite yet */
274
275 ssl3_init_finished_mac(s);
276
277 s->state = SSL3_ST_CW_CLNT_HELLO_A;
278 s->ctx->stats.sess_connect++;
279 s->init_num = 0;
280 s->s3->flags &= ~SSL3_FLAGS_CCS_OK;
281 /*
282 * Should have been reset by ssl3_get_finished, too.
283 */
284 s->s3->change_cipher_spec = 0;
285 break;
286
287 case SSL3_ST_CW_CLNT_HELLO_A:
288 case SSL3_ST_CW_CLNT_HELLO_B:
289
290 s->shutdown = 0;
291 ret = ssl3_client_hello(s);
292 if (ret <= 0)
293 goto end;
294 s->state = SSL3_ST_CR_SRVR_HELLO_A;
295 s->init_num = 0;
296
297 /* turn on buffering for the next lot of output */
298 if (s->bbio != s->wbio)
299 s->wbio = BIO_push(s->bbio, s->wbio);
300
301 break;
302
303 case SSL3_ST_CR_SRVR_HELLO_A:
304 case SSL3_ST_CR_SRVR_HELLO_B:
305 ret = ssl3_get_server_hello(s);
306 if (ret <= 0)
307 goto end;
308
309 if (s->hit) {
310 s->state = SSL3_ST_CR_FINISHED_A;
c519e89f 311#ifndef OPENSSL_NO_TLSEXT
0f113f3e
MC		 312 if (s->tlsext_ticket_expected) {
313 /* receive renewed session ticket */
314 s->state = SSL3_ST_CR_SESSION_TICKET_A;
315 }
316#endif
317 } else {
318 s->state = SSL3_ST_CR_CERT_A;
319 }
320 s->init_num = 0;
321 break;
322 case SSL3_ST_CR_CERT_A:
323 case SSL3_ST_CR_CERT_B:
324 /* Check if it is anon DH/ECDH, SRP auth */
325 /* or PSK */
326 if (!
327 (s->s3->tmp.
328 new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP))
329&& !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) {
330 ret = ssl3_get_server_certificate(s);
331 if (ret <= 0)
332 goto end;
67c8e7f4 333#ifndef OPENSSL_NO_TLSEXT
0f113f3e
MC		 334 if (s->tlsext_status_expected)
335 s->state = SSL3_ST_CR_CERT_STATUS_A;
336 else
337 s->state = SSL3_ST_CR_KEY_EXCH_A;
338 } else {
339 skip = 1;
340 s->state = SSL3_ST_CR_KEY_EXCH_A;
341 }
67c8e7f4 342#else
0f113f3e
MC		 343 } else
344 skip = 1;
345
346 s->state = SSL3_ST_CR_KEY_EXCH_A;
347#endif
348 s->init_num = 0;
349 break;
350
351 case SSL3_ST_CR_KEY_EXCH_A:
352 case SSL3_ST_CR_KEY_EXCH_B:
353 ret = ssl3_get_key_exchange(s);
354 if (ret <= 0)
355 goto end;
356 s->state = SSL3_ST_CR_CERT_REQ_A;
357 s->init_num = 0;
358
359 /*
360 * at this point we check that we have the required stuff from
361 * the server
362 */
363 if (!ssl3_check_cert_and_algorithm(s)) {
364 ret = -1;
365 goto end;
366 }
367 break;
368
369 case SSL3_ST_CR_CERT_REQ_A:
370 case SSL3_ST_CR_CERT_REQ_B:
371 ret = ssl3_get_certificate_request(s);
372 if (ret <= 0)
373 goto end;
374 s->state = SSL3_ST_CR_SRVR_DONE_A;
375 s->init_num = 0;
376 break;
377
378 case SSL3_ST_CR_SRVR_DONE_A:
379 case SSL3_ST_CR_SRVR_DONE_B:
380 ret = ssl3_get_server_done(s);
381 if (ret <= 0)
382 goto end;
edc032b5 383#ifndef OPENSSL_NO_SRP
0f113f3e
MC		 384 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
385 if ((ret = SRP_Calc_A_param(s)) <= 0) {
386 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_SRP_A_CALC);
387 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
388 goto end;
389 }
390 }
391#endif
392 if (s->s3->tmp.cert_req)
393 s->state = SSL3_ST_CW_CERT_A;
394 else
395 s->state = SSL3_ST_CW_KEY_EXCH_A;
396 s->init_num = 0;
397
398 break;
399
400 case SSL3_ST_CW_CERT_A:
401 case SSL3_ST_CW_CERT_B:
402 case SSL3_ST_CW_CERT_C:
403 case SSL3_ST_CW_CERT_D:
404 ret = ssl3_send_client_certificate(s);
405 if (ret <= 0)
406 goto end;
407 s->state = SSL3_ST_CW_KEY_EXCH_A;
408 s->init_num = 0;
409 break;
410
411 case SSL3_ST_CW_KEY_EXCH_A:
412 case SSL3_ST_CW_KEY_EXCH_B:
413 ret = ssl3_send_client_key_exchange(s);
414 if (ret <= 0)
415 goto end;
416 /*
417 * EAY EAY EAY need to check for DH fix cert sent back
418 */
419 /*
420 * For TLS, cert_req is set to 2, so a cert chain of nothing is
421 * sent, but no verify packet is sent
422 */
423 /*
424 * XXX: For now, we do not support client authentication in ECDH
425 * cipher suites with ECDH (rather than ECDSA) certificates. We
426 * need to skip the certificate verify message when client's
427 * ECDH public key is sent inside the client certificate.
428 */
429 if (s->s3->tmp.cert_req == 1) {
430 s->state = SSL3_ST_CW_CERT_VRFY_A;
431 } else {
432 s->state = SSL3_ST_CW_CHANGE_A;
433 }
434 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
435 s->state = SSL3_ST_CW_CHANGE_A;
436 }
437
438 s->init_num = 0;
439 break;
440
441 case SSL3_ST_CW_CERT_VRFY_A:
442 case SSL3_ST_CW_CERT_VRFY_B:
443 ret = ssl3_send_client_verify(s);
444 if (ret <= 0)
445 goto end;
446 s->state = SSL3_ST_CW_CHANGE_A;
447 s->init_num = 0;
448 break;
449
450 case SSL3_ST_CW_CHANGE_A:
451 case SSL3_ST_CW_CHANGE_B:
452 ret = ssl3_send_change_cipher_spec(s,
453 SSL3_ST_CW_CHANGE_A,
454 SSL3_ST_CW_CHANGE_B);
455 if (ret <= 0)
456 goto end;
ee2ffc27 457
bf48836c 458#if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
0f113f3e 459 s->state = SSL3_ST_CW_FINISHED_A;
ee2ffc27 460#else
0f113f3e
MC		 461 if (s->s3->next_proto_neg_seen)
462 s->state = SSL3_ST_CW_NEXT_PROTO_A;
463 else
464 s->state = SSL3_ST_CW_FINISHED_A;
ee2ffc27 465#endif
0f113f3e 466 s->init_num = 0;
d02b48c6 467
0f113f3e 468 s->session->cipher = s->s3->tmp.new_cipher;
09b6c2ef 469#ifdef OPENSSL_NO_COMP
0f113f3e 470 s->session->compress_meth = 0;
09b6c2ef 471#else
0f113f3e
MC		 472 if (s->s3->tmp.new_compression == NULL)
473 s->session->compress_meth = 0;
474 else
475 s->session->compress_meth = s->s3->tmp.new_compression->id;
09b6c2ef 476#endif
0f113f3e
MC		 477 if (!s->method->ssl3_enc->setup_key_block(s)) {
478 ret = -1;
479 goto end;
480 }
d02b48c6 481
0f113f3e
MC		 482 if (!s->method->ssl3_enc->change_cipher_state(s,
483 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
484 {
485 ret = -1;
486 goto end;
487 }
d02b48c6 488
0f113f3e 489 break;
d02b48c6 490
bf48836c 491#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
0f113f3e
MC		 492 case SSL3_ST_CW_NEXT_PROTO_A:
493 case SSL3_ST_CW_NEXT_PROTO_B:
494 ret = ssl3_send_next_proto(s);
495 if (ret <= 0)
496 goto end;
497 s->state = SSL3_ST_CW_FINISHED_A;
498 break;
499#endif
500
501 case SSL3_ST_CW_FINISHED_A:
502 case SSL3_ST_CW_FINISHED_B:
503 ret = ssl3_send_finished(s,
504 SSL3_ST_CW_FINISHED_A,
505 SSL3_ST_CW_FINISHED_B,
506 s->method->
507 ssl3_enc->client_finished_label,
508 s->method->
509 ssl3_enc->client_finished_label_len);
510 if (ret <= 0)
511 goto end;
512 s->state = SSL3_ST_CW_FLUSH;
513
514 /* clear flags */
515 s->s3->flags &= ~SSL3_FLAGS_POP_BUFFER;
516 if (s->hit) {
517 s->s3->tmp.next_state = SSL_ST_OK;
518 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) {
519 s->state = SSL_ST_OK;
520 s->s3->flags |= SSL3_FLAGS_POP_BUFFER;
521 s->s3->delay_buf_pop_ret = 0;
522 }
523 } else {
6434abbf 524#ifndef OPENSSL_NO_TLSEXT
0f113f3e
MC		 525 /*
526 * Allow NewSessionTicket if ticket expected
527 */
528 if (s->tlsext_ticket_expected)
529 s->s3->tmp.next_state = SSL3_ST_CR_SESSION_TICKET_A;
530 else
6434abbf
DSH		 531#endif
532
0f113f3e
MC		 533 s->s3->tmp.next_state = SSL3_ST_CR_FINISHED_A;
534 }
535 s->init_num = 0;
536 break;
d02b48c6 537
0f113f3e
MC		 538#ifndef OPENSSL_NO_TLSEXT
539 case SSL3_ST_CR_SESSION_TICKET_A:
540 case SSL3_ST_CR_SESSION_TICKET_B:
541 ret = ssl3_get_new_session_ticket(s);
542 if (ret <= 0)
543 goto end;
544 s->state = SSL3_ST_CR_FINISHED_A;
545 s->init_num = 0;
546 break;
547
548 case SSL3_ST_CR_CERT_STATUS_A:
549 case SSL3_ST_CR_CERT_STATUS_B:
550 ret = ssl3_get_cert_status(s);
551 if (ret <= 0)
552 goto end;
553 s->state = SSL3_ST_CR_KEY_EXCH_A;
554 s->init_num = 0;
555 break;
556#endif
557
558 case SSL3_ST_CR_FINISHED_A:
559 case SSL3_ST_CR_FINISHED_B:
560 s->s3->flags |= SSL3_FLAGS_CCS_OK;
561 ret = ssl3_get_finished(s, SSL3_ST_CR_FINISHED_A,
562 SSL3_ST_CR_FINISHED_B);
563 if (ret <= 0)
564 goto end;
565
566 if (s->hit)
567 s->state = SSL3_ST_CW_CHANGE_A;
568 else
569 s->state = SSL_ST_OK;
570 s->init_num = 0;
571 break;
572
573 case SSL3_ST_CW_FLUSH:
574 s->rwstate = SSL_WRITING;
575 if (BIO_flush(s->wbio) <= 0) {
576 ret = -1;
577 goto end;
578 }
579 s->rwstate = SSL_NOTHING;
580 s->state = s->s3->tmp.next_state;
581 break;
582
583 case SSL_ST_OK:
584 /* clean a few things up */
585 ssl3_cleanup_key_block(s);
586
587 if (s->init_buf != NULL) {
588 BUF_MEM_free(s->init_buf);
589 s->init_buf = NULL;
590 }
591
592 /*
593 * If we are not 'joining' the last two packets, remove the
594 * buffering now
595 */
596 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
597 ssl_free_wbio_buffer(s);
598 /* else do it later in ssl3_write */
599
600 s->init_num = 0;
601 s->renegotiate = 0;
602 s->new_session = 0;
603
604 ssl_update_cache(s, SSL_SESS_CACHE_CLIENT);
605 if (s->hit)
606 s->ctx->stats.sess_hit++;
607
608 ret = 1;
609 /* s->server=0; */
610 s->handshake_func = ssl3_connect;
611 s->ctx->stats.sess_connect_good++;
612
613 if (cb != NULL)
614 cb(s, SSL_CB_HANDSHAKE_DONE, 1);
615
616 goto end;
617 /* break; */
618
619 default:
620 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_UNKNOWN_STATE);
621 ret = -1;
622 goto end;
623 /* break; */
624 }
625
626 /* did we do anything */
627 if (!s->s3->tmp.reuse_message && !skip) {
628 if (s->debug) {
629 if ((ret = BIO_flush(s->wbio)) <= 0)
630 goto end;
631 }
632
633 if ((cb != NULL) && (s->state != state)) {
634 new_state = s->state;
635 s->state = state;
636 cb(s, SSL_CB_CONNECT_LOOP, 1);
637 s->state = new_state;
638 }
639 }
640 skip = 0;
641 }
642 end:
643 s->in_handshake--;
644 if (buf != NULL)
645 BUF_MEM_free(buf);
646 if (cb != NULL)
647 cb(s, SSL_CB_CONNECT_EXIT, ret);
648 return (ret);
649}
d02b48c6 650
36d16f8e 651int ssl3_client_hello(SSL *s)
0f113f3e
MC		 652{
653 unsigned char *buf;
654 unsigned char *p, *d;
655 int i;
656 unsigned long l;
657 int al = 0;
09b6c2ef 658#ifndef OPENSSL_NO_COMP
0f113f3e
MC		 659 int j;
660 SSL_COMP *comp;
661#endif
662
663 buf = (unsigned char *)s->init_buf->data;
664 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) {
665 SSL_SESSION *sess = s->session;
666 if ((sess == NULL) ||
667 (sess->ssl_version != s->version) ||
668 !sess->session_id_length || (sess->not_resumable)) {
669 if (!ssl_get_new_session(s, 0))
670 goto err;
671 }
672 if (s->method->version == DTLS_ANY_VERSION) {
673 /* Determine which DTLS version to use */
674 int options = s->options;
675 /* If DTLS 1.2 disabled correct the version number */
676 if (options & SSL_OP_NO_DTLSv1_2) {
677 if (tls1_suiteb(s)) {
678 SSLerr(SSL_F_SSL3_CLIENT_HELLO,
679 SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
680 goto err;
681 }
682 /*
683 * Disabling all versions is silly: return an error.
684 */
685 if (options & SSL_OP_NO_DTLSv1) {
686 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_WRONG_SSL_VERSION);
687 goto err;
688 }
689 /*
690 * Update method so we don't use any DTLS 1.2 features.
691 */
692 s->method = DTLSv1_client_method();
693 s->version = DTLS1_VERSION;
694 } else {
695 /*
696 * We only support one version: update method
697 */
698 if (options & SSL_OP_NO_DTLSv1)
699 s->method = DTLSv1_2_client_method();
700 s->version = DTLS1_2_VERSION;
701 }
702 s->client_version = s->version;
703 }
704 /* else use the pre-loaded session */
705
706 p = s->s3->client_random;
707
708 /*
709 * for DTLS if client_random is initialized, reuse it, we are
710 * required to use same upon reply to HelloVerify
711 */
712 if (SSL_IS_DTLS(s)) {
713 size_t idx;
714 i = 1;
715 for (idx = 0; idx < sizeof(s->s3->client_random); idx++) {
716 if (p[idx]) {
717 i = 0;
718 break;
719 }
720 }
721 } else
722 i = 1;
723
e1b568dd
MC		 724 if (i && ssl_fill_hello_random(s, 0, p,
725 sizeof(s->s3->client_random)) <= 0)
726 goto err;
0f113f3e
MC		 727
728 /* Do the message type and length last */
729 d = p = ssl_handshake_start(s);
730
35a1cc90
MC		 731 /*-
732 * version indicates the negotiated version: for example from
733 * an SSLv2/v3 compatible client hello). The client_version
734 * field is the maximum version we permit and it is also
735 * used in RSA encrypted premaster secrets. Some servers can
736 * choke if we initially report a higher version then
737 * renegotiate to a lower one in the premaster secret. This
738 * didn't happen with TLS 1.0 as most servers supported it
739 * but it can with TLS 1.1 or later if the server only supports
740 * 1.0.
741 *
742 * Possible scenario with previous logic:
743 * 1. Client hello indicates TLS 1.2
744 * 2. Server hello says TLS 1.0
745 * 3. RSA encrypted premaster secret uses 1.2.
746 * 4. Handhaked proceeds using TLS 1.0.
747 * 5. Server sends hello request to renegotiate.
748 * 6. Client hello indicates TLS v1.0 as we now
749 * know that is maximum server supports.
750 * 7. Server chokes on RSA encrypted premaster secret
751 * containing version 1.0.
752 *
753 * For interoperability it should be OK to always use the
754 * maximum version we support in client hello and then rely
755 * on the checking of version to ensure the servers isn't
756 * being inconsistent: for example initially negotiating with
757 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
758 * client_version in client hello and not resetting it to
759 * the negotiated version.
760 */
0f113f3e
MC		 761 *(p++) = s->client_version >> 8;
762 *(p++) = s->client_version & 0xff;
0f113f3e
MC		 763
764 /* Random stuff */
765 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
766 p += SSL3_RANDOM_SIZE;
767
768 /* Session ID */
769 if (s->new_session)
770 i = 0;
771 else
772 i = s->session->session_id_length;
773 *(p++) = i;
774 if (i != 0) {
775 if (i > (int)sizeof(s->session->session_id)) {
776 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
777 goto err;
778 }
779 memcpy(p, s->session->session_id, i);
780 p += i;
781 }
782
783 /* cookie stuff for DTLS */
784 if (SSL_IS_DTLS(s)) {
785 if (s->d1->cookie_len > sizeof(s->d1->cookie)) {
786 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
787 goto err;
788 }
789 *(p++) = s->d1->cookie_len;
790 memcpy(p, s->d1->cookie, s->d1->cookie_len);
791 p += s->d1->cookie_len;
792 }
793
794 /* Ciphers supported */
795 i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]), 0);
796 if (i == 0) {
797 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE);
798 goto err;
799 }
800e1cd9 800#ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
0f113f3e
MC		 801 /*
802 * Some servers hang if client hello > 256 bytes as hack workaround
803 * chop number of supported ciphers to keep it well below this if we
804 * use TLS v1.2
805 */
806 if (TLS1_get_version(s) >= TLS1_2_VERSION
807 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
808 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
809#endif
810 s2n(i, p);
811 p += i;
812
813 /* COMPRESSION */
09b6c2ef 814#ifdef OPENSSL_NO_COMP
0f113f3e 815 *(p++) = 1;
09b6c2ef 816#else
566dda07 817
0f113f3e
MC		 818 if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
819 j = 0;
820 else
821 j = sk_SSL_COMP_num(s->ctx->comp_methods);
822 *(p++) = 1 + j;
823 for (i = 0; i < j; i++) {
824 comp = sk_SSL_COMP_value(s->ctx->comp_methods, i);
825 *(p++) = comp->id;
826 }
09b6c2ef 827#endif
0f113f3e 828 *(p++) = 0; /* Add the NULL method */
761772d7 829
ed3883d2 830#ifndef OPENSSL_NO_TLSEXT
0f113f3e
MC		 831 /* TLS extensions */
832 if (ssl_prepare_clienthello_tlsext(s) <= 0) {
833 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
834 goto err;
835 }
836 if ((p =
837 ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH,
838 &al)) == NULL) {
839 ssl3_send_alert(s, SSL3_AL_FATAL, al);
840 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
841 goto err;
842 }
843#endif
844
845 l = p - d;
846 ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l);
847 s->state = SSL3_ST_CW_CLNT_HELLO_B;
848 }
849
850 /* SSL3_ST_CW_CLNT_HELLO_B */
851 return ssl_do_write(s);
852 err:
853 return (-1);
854}
d02b48c6 855
36d16f8e 856int ssl3_get_server_hello(SSL *s)
0f113f3e
MC		 857{
858 STACK_OF(SSL_CIPHER) *sk;
859 const SSL_CIPHER *c;
860 CERT *ct = s->cert;
861 unsigned char *p, *d;
862 int i, al = SSL_AD_INTERNAL_ERROR, ok;
863 unsigned int j;
864 long n;
09b6c2ef 865#ifndef OPENSSL_NO_COMP
0f113f3e
MC		 866 SSL_COMP *comp;
867#endif
868 /*
869 * Hello verify request and/or server hello version may not match so set
870 * first packet if we're negotiating version.
871 */
872 if (SSL_IS_DTLS(s))
873 s->first_packet = 1;
874
875 n = s->method->ssl_get_message(s,
876 SSL3_ST_CR_SRVR_HELLO_A,
877 SSL3_ST_CR_SRVR_HELLO_B, -1, 20000, &ok);
878
879 if (!ok)
880 return ((int)n);
881
882 if (SSL_IS_DTLS(s)) {
883 s->first_packet = 0;
884 if (s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) {
885 if (s->d1->send_cookie == 0) {
886 s->s3->tmp.reuse_message = 1;
887 return 1;
888 } else { /* already sent a cookie */
889
890 al = SSL_AD_UNEXPECTED_MESSAGE;
891 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_MESSAGE_TYPE);
892 goto f_err;
893 }
894 }
895 }
896
897 if (s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) {
898 al = SSL_AD_UNEXPECTED_MESSAGE;
899 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_MESSAGE_TYPE);
900 goto f_err;
901 }
902
903 d = p = (unsigned char *)s->init_msg;
904 if (s->method->version == DTLS_ANY_VERSION) {
905 /* Work out correct protocol version to use */
906 int hversion = (p[0] << 8) | p[1];
907 int options = s->options;
908 if (hversion == DTLS1_2_VERSION && !(options & SSL_OP_NO_DTLSv1_2))
909 s->method = DTLSv1_2_client_method();
910 else if (tls1_suiteb(s)) {
911 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
912 SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
913 s->version = hversion;
914 al = SSL_AD_PROTOCOL_VERSION;
915 goto f_err;
916 } else if (hversion == DTLS1_VERSION && !(options & SSL_OP_NO_DTLSv1))
917 s->method = DTLSv1_client_method();
918 else {
919 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION);
920 s->version = hversion;
921 al = SSL_AD_PROTOCOL_VERSION;
922 goto f_err;
923 }
924 s->version = s->method->version;
925 }
926
927 if ((p[0] != (s->version >> 8)) || (p[1] != (s->version & 0xff))) {
928 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION);
929 s->version = (s->version & 0xff00) | p[1];
930 al = SSL_AD_PROTOCOL_VERSION;
931 goto f_err;
932 }
933 p += 2;
934
935 /* load the server hello data */
936 /* load the server random */
937 memcpy(s->s3->server_random, p, SSL3_RANDOM_SIZE);
938 p += SSL3_RANDOM_SIZE;
939
940 s->hit = 0;
941
942 /* get the session-id */
943 j = *(p++);
944
945 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) {
946 al = SSL_AD_ILLEGAL_PARAMETER;
947 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG);
948 goto f_err;
949 }
12bf56c0 950#ifndef OPENSSL_NO_TLSEXT
0f113f3e
MC		 951 /*
952 * check if we want to resume the session based on external pre-shared
953 * secret
954 */
955 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb) {
956 SSL_CIPHER *pref_cipher = NULL;
957 s->session->master_key_length = sizeof(s->session->master_key);
958 if (s->tls_session_secret_cb(s, s->session->master_key,
959 &s->session->master_key_length,
960 NULL, &pref_cipher,
961 s->tls_session_secret_cb_arg)) {
962 s->session->cipher = pref_cipher ?
963 pref_cipher : ssl_get_cipher_by_char(s, p + j);
964 s->hit = 1;
965 }
966 }
967#endif /* OPENSSL_NO_TLSEXT */
968
969 if (!s->hit && j != 0 && j == s->session->session_id_length
970 && memcmp(p, s->session->session_id, j) == 0) {
971 if (s->sid_ctx_length != s->session->sid_ctx_length
972 || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) {
973 /* actually a client application bug */
974 al = SSL_AD_ILLEGAL_PARAMETER;
975 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
976 SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
977 goto f_err;
978 }
979 s->hit = 1;
980 }
981 /* a miss or crap from the other end */
982 if (!s->hit) {
983 /*
984 * If we were trying for session-id reuse, make a new SSL_SESSION so
985 * we don't stuff up other people
986 */
987 if (s->session->session_id_length > 0) {
988 if (!ssl_get_new_session(s, 0)) {
989 goto f_err;
990 }
991 }
992 s->session->session_id_length = j;
993 memcpy(s->session->session_id, p, j); /* j could be 0 */
994 }
995 p += j;
996 c = ssl_get_cipher_by_char(s, p);
997 if (c == NULL) {
998 /* unknown cipher */
999 al = SSL_AD_ILLEGAL_PARAMETER;
1000 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED);
1001 goto f_err;
1002 }
1003 /* Set version disabled mask now we know version */
1004 if (!SSL_USE_TLS1_2_CIPHERS(s))
1005 ct->mask_ssl = SSL_TLSV1_2;
1006 else
1007 ct->mask_ssl = 0;
1008 /*
1009 * If it is a disabled cipher we didn't send it in client hello, so
1010 * return an error.
1011 */
1012 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) {
1013 al = SSL_AD_ILLEGAL_PARAMETER;
1014 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
1015 goto f_err;
1016 }
1017 p += ssl_put_cipher_by_char(s, NULL, NULL);
1018
1019 sk = ssl_get_ciphers_by_id(s);
1020 i = sk_SSL_CIPHER_find(sk, c);
1021 if (i < 0) {
1022 /* we did not say we would use this cipher */
1023 al = SSL_AD_ILLEGAL_PARAMETER;
1024 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
1025 goto f_err;
1026 }
1027
1028 /*
1029 * Depending on the session caching (internal/external), the cipher
1030 * and/or cipher_id values may not be set. Make sure that cipher_id is
1031 * set and use it for comparison.
1032 */
1033 if (s->session->cipher)
1034 s->session->cipher_id = s->session->cipher->id;
1035 if (s->hit && (s->session->cipher_id != c->id)) {
9e9858d1
RS		 1036 al = SSL_AD_ILLEGAL_PARAMETER;
1037 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
1038 SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1039 goto f_err;
0f113f3e
MC		 1040 }
1041 s->s3->tmp.new_cipher = c;
1042 /*
1043 * Don't digest cached records if no sigalgs: we may need them for client
1044 * authentication.
1045 */
1046 if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s))
1047 goto f_err;
1048 /* lets get the compression algorithm */
1049 /* COMPRESSION */
09b6c2ef 1050#ifdef OPENSSL_NO_COMP
0f113f3e
MC		 1051 if (*(p++) != 0) {
1052 al = SSL_AD_ILLEGAL_PARAMETER;
1053 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
1054 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1055 goto f_err;
1056 }
1057 /*
1058 * If compression is disabled we'd better not try to resume a session
1059 * using compression.
1060 */
1061 if (s->session->compress_meth != 0) {
1062 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION);
1063 goto f_err;
1064 }
09b6c2ef 1065#else
0f113f3e
MC		 1066 j = *(p++);
1067 if (s->hit && j != s->session->compress_meth) {
1068 al = SSL_AD_ILLEGAL_PARAMETER;
1069 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
1070 SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1071 goto f_err;
1072 }
1073 if (j == 0)
1074 comp = NULL;
1075 else if (!ssl_allow_compression(s)) {
1076 al = SSL_AD_ILLEGAL_PARAMETER;
1077 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED);
1078 goto f_err;
1079 } else
1080 comp = ssl3_comp_find(s->ctx->comp_methods, j);
1081
1082 if ((j != 0) && (comp == NULL)) {
1083 al = SSL_AD_ILLEGAL_PARAMETER;
1084 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,
1085 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1086 goto f_err;
1087 } else {
1088 s->s3->tmp.new_compression = comp;
1089 }
09b6c2ef 1090#endif
761772d7 1091
ed3883d2 1092#ifndef OPENSSL_NO_TLSEXT
0f113f3e
MC		 1093 /* TLS extensions */
1094 if (!ssl_parse_serverhello_tlsext(s, &p, d, n)) {
1095 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_PARSE_TLSEXT);
1096 goto err;
1097 }
1098#endif
1099
1100 if (p != (d + n)) {
1101 /* wrong packet length */
1102 al = SSL_AD_DECODE_ERROR;
1103 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH);
1104 goto f_err;
1105 }
1106
1107 return (1);
1108 f_err:
1109 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1110 err:
1111 return (-1);
1112}
d02b48c6 1113
36d16f8e 1114int ssl3_get_server_certificate(SSL *s)
0f113f3e
MC		 1115{
1116 int al, i, ok, ret = -1;
1117 unsigned long n, nc, llen, l;
1118 X509 *x = NULL;
1119 const unsigned char *q, *p;
1120 unsigned char *d;
1121 STACK_OF(X509) *sk = NULL;
1122 SESS_CERT *sc;
1123 EVP_PKEY *pkey = NULL;
1124 int need_cert = 1; /* VRS: 0=> will allow null cert if auth ==
1125 * KRB5 */
1126
1127 n = s->method->ssl_get_message(s,
1128 SSL3_ST_CR_CERT_A,
1129 SSL3_ST_CR_CERT_B,
1130 -1, s->max_cert_list, &ok);
1131
1132 if (!ok)
1133 return ((int)n);
1134
1135 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1136 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1137 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE))) {
1138 s->s3->tmp.reuse_message = 1;
1139 return (1);
1140 }
1141
1142 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) {
1143 al = SSL_AD_UNEXPECTED_MESSAGE;
1144 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_BAD_MESSAGE_TYPE);
1145 goto f_err;
1146 }
1147 p = d = (unsigned char *)s->init_msg;
1148
1149 if ((sk = sk_X509_new_null()) == NULL) {
1150 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1151 goto err;
1152 }
1153
1154 n2l3(p, llen);
1155 if (llen + 3 != n) {
1156 al = SSL_AD_DECODE_ERROR;
1157 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH);
1158 goto f_err;
1159 }
1160 for (nc = 0; nc < llen;) {
1161 n2l3(p, l);
1162 if ((l + nc + 3) > llen) {
1163 al = SSL_AD_DECODE_ERROR;
1164 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1165 SSL_R_CERT_LENGTH_MISMATCH);
1166 goto f_err;
1167 }
1168
1169 q = p;
1170 x = d2i_X509(NULL, &q, l);
1171 if (x == NULL) {
1172 al = SSL_AD_BAD_CERTIFICATE;
1173 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_ASN1_LIB);
1174 goto f_err;
1175 }
1176 if (q != (p + l)) {
1177 al = SSL_AD_DECODE_ERROR;
1178 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1179 SSL_R_CERT_LENGTH_MISMATCH);
1180 goto f_err;
1181 }
1182 if (!sk_X509_push(sk, x)) {
1183 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1184 goto err;
1185 }
1186 x = NULL;
1187 nc += l + 3;
1188 p = q;
1189 }
1190
1191 i = ssl_verify_cert_chain(s, sk);
1192 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
82d5d46c 1193#ifndef OPENSSL_NO_KRB5
0f113f3e
MC		 1194 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1195 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1196#endif /* OPENSSL_NO_KRB5 */
1197 ) {
1198 al = ssl_verify_alarm_type(s->verify_result);
1199 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1200 SSL_R_CERTIFICATE_VERIFY_FAILED);
1201 goto f_err;
1202 }
1203 ERR_clear_error(); /* but we keep s->verify_result */
1204 if (i > 1) {
1205 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, i);
1206 al = SSL_AD_HANDSHAKE_FAILURE;
1207 goto f_err;
1208 }
1209
1210 sc = ssl_sess_cert_new();
1211 if (sc == NULL)
1212 goto err;
1213
1214 if (s->session->sess_cert)
1215 ssl_sess_cert_free(s->session->sess_cert);
1216 s->session->sess_cert = sc;
1217
1218 sc->cert_chain = sk;
1219 /*
1220 * Inconsistency alert: cert_chain does include the peer's certificate,
1221 * which we don't include in s3_srvr.c
1222 */
1223 x = sk_X509_value(sk, 0);
1224 sk = NULL;
1225 /*
1226 * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end
1227 */
1228
1229 pkey = X509_get_pubkey(x);
1230
1231 /* VRS: allow null cert if auth == KRB5 */
1232 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1233 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1234 ? 0 : 1;
f9b3bff6
RL		 1235
1236#ifdef KSSL_DEBUG
0f113f3e
MC		 1237 fprintf(stderr, "pkey,x = %p, %p\n", pkey, x);
1238 fprintf(stderr, "ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x, pkey));
1239 fprintf(stderr, "cipher, alg, nc = %s, %lx, %lx, %d\n",
1240 s->s3->tmp.new_cipher->name,
1241 s->s3->tmp.new_cipher->algorithm_mkey,
1242 s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1243#endif /* KSSL_DEBUG */
1244
1245 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) {
1246 x = NULL;
1247 al = SSL3_AL_FATAL;
1248 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1249 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1250 goto f_err;
1251 }
1252
1253 i = ssl_cert_type(x, pkey);
1254 if (need_cert && i < 0) {
1255 x = NULL;
1256 al = SSL3_AL_FATAL;
1257 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1258 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1259 goto f_err;
1260 }
1261
1262 if (need_cert) {
1263 int exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1264 if (exp_idx >= 0 && i != exp_idx) {
1265 x = NULL;
1266 al = SSL_AD_ILLEGAL_PARAMETER;
1267 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1268 SSL_R_WRONG_CERTIFICATE_TYPE);
1269 goto f_err;
1270 }
1271 sc->peer_cert_type = i;
1272 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
1273 /*
1274 * Why would the following ever happen? We just created sc a couple
1275 * of lines ago.
1276 */
1277 if (sc->peer_pkeys[i].x509 != NULL)
1278 X509_free(sc->peer_pkeys[i].x509);
1279 sc->peer_pkeys[i].x509 = x;
1280 sc->peer_key = &(sc->peer_pkeys[i]);
1281
1282 if (s->session->peer != NULL)
1283 X509_free(s->session->peer);
1284 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
1285 s->session->peer = x;
1286 } else {
1287 sc->peer_cert_type = i;
1288 sc->peer_key = NULL;
1289
1290 if (s->session->peer != NULL)
1291 X509_free(s->session->peer);
1292 s->session->peer = NULL;
1293 }
1294 s->session->verify_result = s->verify_result;
1295
1296 x = NULL;
1297 ret = 1;
1298 if (0) {
1299 f_err:
1300 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1301 }
1302 err:
1303 EVP_PKEY_free(pkey);
1304 X509_free(x);
1305 sk_X509_pop_free(sk, X509_free);
1306 return (ret);
1307}
d02b48c6 1308
36d16f8e 1309int ssl3_get_key_exchange(SSL *s)
0f113f3e 1310{
bc36ee62 1311#ifndef OPENSSL_NO_RSA
0f113f3e
MC		 1312 unsigned char *q, md_buf[EVP_MAX_MD_SIZE * 2];
1313#endif
1314 EVP_MD_CTX md_ctx;
1315 unsigned char *param, *p;
1316 int al, j, ok;
1317 long i, param_len, n, alg_k, alg_a;
1318 EVP_PKEY *pkey = NULL;
1319 const EVP_MD *md = NULL;
bc36ee62 1320#ifndef OPENSSL_NO_RSA
0f113f3e 1321 RSA *rsa = NULL;
79df9d62 1322#endif
bc36ee62 1323#ifndef OPENSSL_NO_DH
0f113f3e 1324 DH *dh = NULL;
58964a49 1325#endif
10bf4fc2 1326#ifndef OPENSSL_NO_EC
0f113f3e
MC		 1327 EC_KEY *ecdh = NULL;
1328 BN_CTX *bn_ctx = NULL;
1329 EC_POINT *srvr_ecpoint = NULL;
1330 int curve_nid = 0;
1331 int encoded_pt_len = 0;
1332#endif
1333
1334 EVP_MD_CTX_init(&md_ctx);
1335
1336 /*
1337 * use same message size as in ssl3_get_certificate_request() as
1338 * ServerKeyExchange message may be skipped
1339 */
1340 n = s->method->ssl_get_message(s,
1341 SSL3_ST_CR_KEY_EXCH_A,
1342 SSL3_ST_CR_KEY_EXCH_B,
1343 -1, s->max_cert_list, &ok);
1344 if (!ok)
1345 return ((int)n);
1346
1347 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1348
1349 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) {
1350 /*
1351 * Can't skip server key exchange if this is an ephemeral
1352 * ciphersuite.
1353 */
1354 if (alg_k & (SSL_kDHE | SSL_kECDHE)) {
1355 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1356 al = SSL_AD_UNEXPECTED_MESSAGE;
1357 goto f_err;
1358 }
ddac1974 1359#ifndef OPENSSL_NO_PSK
0f113f3e
MC		 1360 /*
1361 * In plain PSK ciphersuite, ServerKeyExchange can be omitted if no
1362 * identity hint is sent. Set session->sess_cert anyway to avoid
1363 * problems later.
1364 */
1365 if (alg_k & SSL_kPSK) {
1366 s->session->sess_cert = ssl_sess_cert_new();
1367 if (s->ctx->psk_identity_hint)
1368 OPENSSL_free(s->ctx->psk_identity_hint);
1369 s->ctx->psk_identity_hint = NULL;
1370 }
1371#endif
1372 s->s3->tmp.reuse_message = 1;
1373 return (1);
1374 }
1375
1376 param = p = (unsigned char *)s->init_msg;
1377 if (s->session->sess_cert != NULL) {
bc36ee62 1378#ifndef OPENSSL_NO_RSA
0f113f3e
MC		 1379 if (s->session->sess_cert->peer_rsa_tmp != NULL) {
1380 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1381 s->session->sess_cert->peer_rsa_tmp = NULL;
1382 }
d02b48c6 1383#endif
bc36ee62 1384#ifndef OPENSSL_NO_DH
0f113f3e
MC		 1385 if (s->session->sess_cert->peer_dh_tmp) {
1386 DH_free(s->session->sess_cert->peer_dh_tmp);
1387 s->session->sess_cert->peer_dh_tmp = NULL;
1388 }
ea262260 1389#endif
10bf4fc2 1390#ifndef OPENSSL_NO_EC
0f113f3e
MC		 1391 if (s->session->sess_cert->peer_ecdh_tmp) {
1392 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1393 s->session->sess_cert->peer_ecdh_tmp = NULL;
1394 }
d02b48c6 1395#endif
0f113f3e
MC		 1396 } else {
1397 s->session->sess_cert = ssl_sess_cert_new();
1398 }
d02b48c6 1399
0f113f3e
MC		 1400 /* Total length of the parameters including the length prefix */
1401 param_len = 0;
f2be92b9 1402
0f113f3e 1403 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
d02b48c6 1404
0f113f3e 1405 al = SSL_AD_DECODE_ERROR;
f2be92b9 1406
ddac1974 1407#ifndef OPENSSL_NO_PSK
0f113f3e
MC		 1408 if (alg_k & SSL_kPSK) {
1409 char tmp_id_hint[PSK_MAX_IDENTITY_LEN + 1];
1410
1411 param_len = 2;
1412 if (param_len > n) {
1413 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1414 goto f_err;
1415 }
1416 n2s(p, i);
1417
1418 /*
1419 * Store PSK identity hint for later use, hint is used in
1420 * ssl3_send_client_key_exchange. Assume that the maximum length of
1421 * a PSK identity hint can be as long as the maximum length of a PSK
1422 * identity.
1423 */
1424 if (i > PSK_MAX_IDENTITY_LEN) {
1425 al = SSL_AD_HANDSHAKE_FAILURE;
1426 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_DATA_LENGTH_TOO_LONG);
1427 goto f_err;
1428 }
1429 if (i > n - param_len) {
1430 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1431 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1432 goto f_err;
1433 }
1434 param_len += i;
1435
1436 /*
1437 * If received PSK identity hint contains NULL characters, the hint
1438 * is truncated from the first NULL. p may not be ending with NULL,
1439 * so create a NULL-terminated string.
1440 */
1441 memcpy(tmp_id_hint, p, i);
1442 memset(tmp_id_hint + i, 0, PSK_MAX_IDENTITY_LEN + 1 - i);
1443 if (s->ctx->psk_identity_hint != NULL)
1444 OPENSSL_free(s->ctx->psk_identity_hint);
1445 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1446 if (s->ctx->psk_identity_hint == NULL) {
1447 al = SSL_AD_HANDSHAKE_FAILURE;
1448 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1449 goto f_err;
1450 }
1451
1452 p += i;
1453 n -= param_len;
1454 } else
1455#endif /* !OPENSSL_NO_PSK */
edc032b5 1456#ifndef OPENSSL_NO_SRP
0f113f3e
MC		 1457 if (alg_k & SSL_kSRP) {
1458 param_len = 2;
1459 if (param_len > n) {
1460 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1461 goto f_err;
1462 }
1463 n2s(p, i);
1464
1465 if (i > n - param_len) {
1466 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_N_LENGTH);
1467 goto f_err;
1468 }
1469 param_len += i;
1470
1471 if (!(s->srp_ctx.N = BN_bin2bn(p, i, NULL))) {
1472 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1473 goto err;
1474 }
1475 p += i;
1476
1477 if (2 > n - param_len) {
1478 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1479 goto f_err;
1480 }
1481 param_len += 2;
1482
1483 n2s(p, i);
1484
1485 if (i > n - param_len) {
1486 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_G_LENGTH);
1487 goto f_err;
1488 }
1489 param_len += i;
1490
1491 if (!(s->srp_ctx.g = BN_bin2bn(p, i, NULL))) {
1492 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1493 goto err;
1494 }
1495 p += i;
1496
1497 if (1 > n - param_len) {
1498 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1499 goto f_err;
1500 }
1501 param_len += 1;
1502
1503 i = (unsigned int)(p[0]);
1504 p++;
1505
1506 if (i > n - param_len) {
1507 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_S_LENGTH);
1508 goto f_err;
1509 }
1510 param_len += i;
1511
1512 if (!(s->srp_ctx.s = BN_bin2bn(p, i, NULL))) {
1513 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1514 goto err;
1515 }
1516 p += i;
1517
1518 if (2 > n - param_len) {
1519 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1520 goto f_err;
1521 }
1522 param_len += 2;
1523
1524 n2s(p, i);
1525
1526 if (i > n - param_len) {
1527 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_B_LENGTH);
1528 goto f_err;
1529 }
1530 param_len += i;
1531
1532 if (!(s->srp_ctx.B = BN_bin2bn(p, i, NULL))) {
1533 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1534 goto err;
1535 }
1536 p += i;
1537 n -= param_len;
1538
1539 if (!srp_verify_server_param(s, &al)) {
1540 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_PARAMETERS);
1541 goto f_err;
1542 }
0989790b 1543
edc032b5 1544/* We must check if there is a certificate */
0f113f3e
MC		 1545# ifndef OPENSSL_NO_RSA
1546 if (alg_a & SSL_aRSA)
1547 pkey =
1548 X509_get_pubkey(s->session->
1549 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1550# else
1551 if (0) ;
1552# endif
1553# ifndef OPENSSL_NO_DSA
1554 else if (alg_a & SSL_aDSS)
1555 pkey =
1556 X509_get_pubkey(s->session->
1557 sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].
1558 x509);
1559# endif
1560 } else
1561#endif /* !OPENSSL_NO_SRP */
edc032b5 1562#ifndef OPENSSL_NO_RSA
0f113f3e
MC		 1563 if (alg_k & SSL_kRSA) {
1564 /* Temporary RSA keys only allowed in export ciphersuites */
1565 if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) {
1566 al = SSL_AD_UNEXPECTED_MESSAGE;
1567 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1568 goto f_err;
1569 }
1570 if ((rsa = RSA_new()) == NULL) {
1571 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1572 goto err;
1573 }
1574
1575 param_len = 2;
1576 if (param_len > n) {
1577 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1578 goto f_err;
1579 }
1580 n2s(p, i);
1581
1582 if (i > n - param_len) {
1583 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_MODULUS_LENGTH);
1584 goto f_err;
1585 }
1586 param_len += i;
1587
1588 if (!(rsa->n = BN_bin2bn(p, i, rsa->n))) {
1589 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1590 goto err;
1591 }
1592 p += i;
1593
1594 if (2 > n - param_len) {
1595 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1596 goto f_err;
1597 }
1598 param_len += 2;
1599
1600 n2s(p, i);
1601
1602 if (i > n - param_len) {
1603 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_E_LENGTH);
1604 goto f_err;
1605 }
1606 param_len += i;
1607
1608 if (!(rsa->e = BN_bin2bn(p, i, rsa->e))) {
1609 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1610 goto err;
1611 }
1612 p += i;
1613 n -= param_len;
1614
1615 /* this should be because we are using an export cipher */
1616 if (alg_a & SSL_aRSA)
1617 pkey =
1618 X509_get_pubkey(s->session->
1619 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1620 else {
1621 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1622 goto err;
1623 }
1624 s->session->sess_cert->peer_rsa_tmp = rsa;
1625 rsa = NULL;
1626 }
1627#else /* OPENSSL_NO_RSA */
1628 if (0) ;
d02b48c6 1629#endif
bc36ee62 1630#ifndef OPENSSL_NO_DH
0f113f3e
MC		 1631 else if (alg_k & SSL_kDHE) {
1632 if ((dh = DH_new()) == NULL) {
1633 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_DH_LIB);
1634 goto err;
1635 }
1636
1637 param_len = 2;
1638 if (param_len > n) {
1639 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1640 goto f_err;
1641 }
1642 n2s(p, i);
1643
1644 if (i > n - param_len) {
1645 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_P_LENGTH);
1646 goto f_err;
1647 }
1648 param_len += i;
1649
1650 if (!(dh->p = BN_bin2bn(p, i, NULL))) {
1651 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1652 goto err;
1653 }
1654 p += i;
1655
1656 if (2 > n - param_len) {
1657 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1658 goto f_err;
1659 }
1660 param_len += 2;
1661
1662 n2s(p, i);
1663
1664 if (i > n - param_len) {
1665 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_G_LENGTH);
1666 goto f_err;
1667 }
1668 param_len += i;
1669
1670 if (!(dh->g = BN_bin2bn(p, i, NULL))) {
1671 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1672 goto err;
1673 }
1674 p += i;
1675
1676 if (2 > n - param_len) {
1677 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1678 goto f_err;
1679 }
1680 param_len += 2;
1681
1682 n2s(p, i);
1683
1684 if (i > n - param_len) {
1685 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_PUB_KEY_LENGTH);
1686 goto f_err;
1687 }
1688 param_len += i;
1689
1690 if (!(dh->pub_key = BN_bin2bn(p, i, NULL))) {
1691 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB);
1692 goto err;
1693 }
1694 p += i;
1695 n -= param_len;
1696
1697 if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) {
1698 al = SSL_AD_HANDSHAKE_FAILURE;
1699 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_DH_KEY_TOO_SMALL);
1700 goto f_err;
1701 }
1702# ifndef OPENSSL_NO_RSA
1703 if (alg_a & SSL_aRSA)
1704 pkey =
1705 X509_get_pubkey(s->session->
1706 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1707# else
1708 if (0) ;
1709# endif
1710# ifndef OPENSSL_NO_DSA
1711 else if (alg_a & SSL_aDSS)
1712 pkey =
1713 X509_get_pubkey(s->session->
1714 sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].
1715 x509);
1716# endif
1717 /* else anonymous DH, so no certificate or pkey. */
1718
1719 s->session->sess_cert->peer_dh_tmp = dh;
1720 dh = NULL;
1721 } else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd)) {
1722 al = SSL_AD_ILLEGAL_PARAMETER;
1723 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1724 SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1725 goto f_err;
1726 }
1727#endif /* !OPENSSL_NO_DH */
ea262260 1728
10bf4fc2 1729#ifndef OPENSSL_NO_EC
0f113f3e
MC		 1730 else if (alg_k & SSL_kECDHE) {
1731 EC_GROUP *ngroup;
1732 const EC_GROUP *group;
1733
1734 if ((ecdh = EC_KEY_new()) == NULL) {
1735 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1736 goto err;
1737 }
1738
1739 /*
1740 * Extract elliptic curve parameters and the server's ephemeral ECDH
1741 * public key. Keep accumulating lengths of various components in
1742 * param_len and make sure it never exceeds n.
1743 */
1744
1745 /*
1746 * XXX: For now we only support named (not generic) curves and the
1747 * ECParameters in this case is just three bytes. We also need one
1748 * byte for the length of the encoded point
1749 */
1750 param_len = 4;
1751 if (param_len > n) {
1752 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1753 goto f_err;
1754 }
1755 /*
1756 * Check curve is one of our preferences, if not server has sent an
1757 * invalid curve. ECParameters is 3 bytes.
1758 */
1759 if (!tls1_check_curve(s, p, 3)) {
1760 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_CURVE);
1761 goto f_err;
1762 }
1763
1764 if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0) {
1765 al = SSL_AD_INTERNAL_ERROR;
1766 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1767 SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1768 goto f_err;
1769 }
1770
1771 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1772 if (ngroup == NULL) {
1773 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB);
1774 goto err;
1775 }
1776 if (EC_KEY_set_group(ecdh, ngroup) == 0) {
1777 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB);
1778 goto err;
1779 }
1780 EC_GROUP_free(ngroup);
1781
1782 group = EC_KEY_get0_group(ecdh);
1783
1784 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1785 (EC_GROUP_get_degree(group) > 163)) {
1786 al = SSL_AD_EXPORT_RESTRICTION;
1787 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1788 SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1789 goto f_err;
1790 }
1791
1792 p += 3;
1793
1794 /* Next, get the encoded ECPoint */
1795 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1796 ((bn_ctx = BN_CTX_new()) == NULL)) {
1797 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1798 goto err;
1799 }
1800
1801 encoded_pt_len = *p; /* length of encoded point */
1802 p += 1;
1803
1804 if ((encoded_pt_len > n - param_len) ||
1805 (EC_POINT_oct2point(group, srvr_ecpoint,
1806 p, encoded_pt_len, bn_ctx) == 0)) {
1807 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_ECPOINT);
1808 goto f_err;
1809 }
1810 param_len += encoded_pt_len;
1811
1812 n -= param_len;
1813 p += encoded_pt_len;
1814
1815 /*
1816 * The ECC/TLS specification does not mention the use of DSA to sign
1817 * ECParameters in the server key exchange message. We do support RSA
1818 * and ECDSA.
1819 */
1820 if (0) ;
1821# ifndef OPENSSL_NO_RSA
1822 else if (alg_a & SSL_aRSA)
1823 pkey =
1824 X509_get_pubkey(s->session->
1825 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1826# endif
10bf4fc2 1827# ifndef OPENSSL_NO_EC
0f113f3e
MC		 1828 else if (alg_a & SSL_aECDSA)
1829 pkey =
1830 X509_get_pubkey(s->session->
1831 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1832# endif
1833 /* else anonymous ECDH, so no certificate or pkey. */
1834 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1835 s->session->sess_cert->peer_ecdh_tmp = ecdh;
1836 ecdh = NULL;
1837 BN_CTX_free(bn_ctx);
1838 bn_ctx = NULL;
1839 EC_POINT_free(srvr_ecpoint);
1840 srvr_ecpoint = NULL;
1841 } else if (alg_k) {
1842 al = SSL_AD_UNEXPECTED_MESSAGE;
1843 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1844 goto f_err;
1845 }
10bf4fc2 1846#endif /* !OPENSSL_NO_EC */
0f113f3e
MC		 1847
1848 /* p points to the next byte, there are 'n' bytes left */
1849
1850 /* if it was signed, check the signature */
1851 if (pkey != NULL) {
1852 if (SSL_USE_SIGALGS(s)) {
1853 int rv;
1854 if (2 > n) {
1855 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1856 goto f_err;
1857 }
1858 rv = tls12_check_peer_sigalg(&md, s, p, pkey);
1859 if (rv == -1)
1860 goto err;
1861 else if (rv == 0) {
1862 goto f_err;
1863 }
a2f9200f 1864#ifdef SSL_DEBUG
0f113f3e
MC		 1865 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1866#endif
1867 p += 2;
1868 n -= 2;
1869 } else
1870 md = EVP_sha1();
1871
1872 if (2 > n) {
1873 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1874 goto f_err;
1875 }
1876 n2s(p, i);
1877 n -= 2;
1878 j = EVP_PKEY_size(pkey);
1879
1880 /*
1881 * Check signature length. If n is 0 then signature is empty
1882 */
1883 if ((i != n) || (n > j) || (n <= 0)) {
1884 /* wrong packet length */
1885 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH);
1886 goto f_err;
1887 }
bc36ee62 1888#ifndef OPENSSL_NO_RSA
0f113f3e
MC		 1889 if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s)) {
1890 int num;
1891 unsigned int size;
1892
1893 j = 0;
1894 q = md_buf;
1895 for (num = 2; num > 0; num--) {
1896 EVP_MD_CTX_set_flags(&md_ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1897 EVP_DigestInit_ex(&md_ctx, (num == 2)
1898 ? s->ctx->md5 : s->ctx->sha1, NULL);
1899 EVP_DigestUpdate(&md_ctx, &(s->s3->client_random[0]),
1900 SSL3_RANDOM_SIZE);
1901 EVP_DigestUpdate(&md_ctx, &(s->s3->server_random[0]),
1902 SSL3_RANDOM_SIZE);
1903 EVP_DigestUpdate(&md_ctx, param, param_len);
1904 EVP_DigestFinal_ex(&md_ctx, q, &size);
1905 q += size;
1906 j += size;
1907 }
1908 i = RSA_verify(NID_md5_sha1, md_buf, j, p, n, pkey->pkey.rsa);
1909 if (i < 0) {
1910 al = SSL_AD_DECRYPT_ERROR;
1911 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_DECRYPT);
1912 goto f_err;
1913 }
1914 if (i == 0) {
1915 /* bad signature */
1916 al = SSL_AD_DECRYPT_ERROR;
1917 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
1918 goto f_err;
1919 }
1920 } else
1921#endif
1922 {
1923 EVP_VerifyInit_ex(&md_ctx, md, NULL);
1924 EVP_VerifyUpdate(&md_ctx, &(s->s3->client_random[0]),
1925 SSL3_RANDOM_SIZE);
1926 EVP_VerifyUpdate(&md_ctx, &(s->s3->server_random[0]),
1927 SSL3_RANDOM_SIZE);
1928 EVP_VerifyUpdate(&md_ctx, param, param_len);
1929 if (EVP_VerifyFinal(&md_ctx, p, (int)n, pkey) <= 0) {
1930 /* bad signature */
1931 al = SSL_AD_DECRYPT_ERROR;
1932 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
1933 goto f_err;
1934 }
1935 }
1936 } else {
1937 /* aNULL, aSRP or kPSK do not need public keys */
1938 if (!(alg_a & (SSL_aNULL | SSL_aSRP)) && !(alg_k & SSL_kPSK)) {
1939 /* Might be wrong key type, check it */
1940 if (ssl3_check_cert_and_algorithm(s))
1941 /* Otherwise this shouldn't happen */
1942 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1943 goto err;
1944 }
1945 /* still data left over */
1946 if (n != 0) {
1947 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE);
1948 goto f_err;
1949 }
1950 }
1951 EVP_PKEY_free(pkey);
1952 EVP_MD_CTX_cleanup(&md_ctx);
1953 return (1);
1954 f_err:
1955 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1956 err:
1957 EVP_PKEY_free(pkey);
bc36ee62 1958#ifndef OPENSSL_NO_RSA
0f113f3e
MC		 1959 if (rsa != NULL)
1960 RSA_free(rsa);
6b521df3 1961#endif
bc36ee62 1962#ifndef OPENSSL_NO_DH
0f113f3e
MC		 1963 if (dh != NULL)
1964 DH_free(dh);
ea262260 1965#endif
10bf4fc2 1966#ifndef OPENSSL_NO_EC
0f113f3e
MC		 1967 BN_CTX_free(bn_ctx);
1968 EC_POINT_free(srvr_ecpoint);
1969 if (ecdh != NULL)
1970 EC_KEY_free(ecdh);
6b521df3 1971#endif
0f113f3e
MC		 1972 EVP_MD_CTX_cleanup(&md_ctx);
1973 return (-1);
1974}
d02b48c6 1975
36d16f8e 1976int ssl3_get_certificate_request(SSL *s)
0f113f3e
MC		 1977{
1978 int ok, ret = 0;
1979 unsigned long n, nc, l;
1980 unsigned int llen, ctype_num, i;
1981 X509_NAME *xn = NULL;
1982 const unsigned char *p, *q;
1983 unsigned char *d;
1984 STACK_OF(X509_NAME) *ca_sk = NULL;
1985
1986 n = s->method->ssl_get_message(s,
1987 SSL3_ST_CR_CERT_REQ_A,
1988 SSL3_ST_CR_CERT_REQ_B,
1989 -1, s->max_cert_list, &ok);
1990
1991 if (!ok)
1992 return ((int)n);
1993
1994 s->s3->tmp.cert_req = 0;
1995
1996 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) {
1997 s->s3->tmp.reuse_message = 1;
1998 /*
1999 * If we get here we don't need any cached handshake records as we
2000 * wont be doing client auth.
2001 */
2002 if (s->s3->handshake_buffer) {
2003 if (!ssl3_digest_cached_records(s))
2004 goto err;
2005 }
2006 return (1);
2007 }
2008
2009 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) {
2010 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
2011 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_WRONG_MESSAGE_TYPE);
2012 goto err;
2013 }
2014
2015 /* TLS does not like anon-DH with client cert */
2016 if (s->version > SSL3_VERSION) {
2017 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) {
2018 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
2019 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
2020 SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
2021 goto err;
2022 }
2023 }
2024
2025 p = d = (unsigned char *)s->init_msg;
2026
2027 if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) {
2028 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
2029 goto err;
2030 }
2031
2032 /* get the certificate types */
2033 ctype_num = *(p++);
2034 if (s->cert->ctypes) {
2035 OPENSSL_free(s->cert->ctypes);
2036 s->cert->ctypes = NULL;
2037 }
2038 if (ctype_num > SSL3_CT_NUMBER) {
2039 /* If we exceed static buffer copy all to cert structure */
2040 s->cert->ctypes = OPENSSL_malloc(ctype_num);
2041 if (s->cert->ctypes == NULL) {
2042 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
2043 goto err;
2044 }
2045 memcpy(s->cert->ctypes, p, ctype_num);
2046 s->cert->ctype_num = (size_t)ctype_num;
2047 ctype_num = SSL3_CT_NUMBER;
2048 }
2049 for (i = 0; i < ctype_num; i++)
2050 s->s3->tmp.ctype[i] = p[i];
2051 p += p[-1];
2052 if (SSL_USE_SIGALGS(s)) {
2053 n2s(p, llen);
2054 /*
2055 * Check we have enough room for signature algorithms and following
2056 * length value.
2057 */
2058 if ((unsigned long)(p - d + llen + 2) > n) {
2059 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2060 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
2061 SSL_R_DATA_LENGTH_TOO_LONG);
2062 goto err;
2063 }
2064 /* Clear certificate digests and validity flags */
2065 for (i = 0; i < SSL_PKEY_NUM; i++) {
2066 s->cert->pkeys[i].digest = NULL;
2067 s->cert->pkeys[i].valid_flags = 0;
2068 }
2069 if ((llen & 1) || !tls1_save_sigalgs(s, p, llen)) {
2070 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2071 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
2072 SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2073 goto err;
2074 }
2075 if (!tls1_process_sigalgs(s)) {
2076 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2077 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
2078 goto err;
2079 }
2080 p += llen;
2081 }
2082
2083 /* get the CA RDNs */
2084 n2s(p, llen);
0f113f3e
MC		 2085
2086 if ((unsigned long)(p - d + llen) != n) {
2087 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2088 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
2089 goto err;
2090 }
2091
2092 for (nc = 0; nc < llen;) {
2093 n2s(p, l);
2094 if ((l + nc + 2) > llen) {
0f113f3e
MC		 2095 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2096 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_CA_DN_TOO_LONG);
2097 goto err;
2098 }
2099
2100 q = p;
2101
2102 if ((xn = d2i_X509_NAME(NULL, &q, l)) == NULL) {
3c33c6f6
MC		 2103 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2104 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB);
2105 goto err;
0f113f3e
MC		 2106 }
2107
2108 if (q != (p + l)) {
2109 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2110 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,
2111 SSL_R_CA_DN_LENGTH_MISMATCH);
2112 goto err;
2113 }
2114 if (!sk_X509_NAME_push(ca_sk, xn)) {
2115 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
2116 goto err;
2117 }
2118
2119 p += l;
2120 nc += l + 2;
2121 }
2122
0f113f3e
MC		 2123 /* we should setup a certificate to return.... */
2124 s->s3->tmp.cert_req = 1;
2125 s->s3->tmp.ctype_num = ctype_num;
2126 if (s->s3->tmp.ca_names != NULL)
2127 sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
2128 s->s3->tmp.ca_names = ca_sk;
2129 ca_sk = NULL;
2130
2131 ret = 1;
2132 err:
2133 if (ca_sk != NULL)
2134 sk_X509_NAME_pop_free(ca_sk, X509_NAME_free);
2135 return (ret);
2136}
2137
2138static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
dfeab068 2139{
0f113f3e 2140 return (X509_NAME_cmp(*a, *b));
dfeab068 2141}
dfeab068 2142
6434abbf
DSH		 2143#ifndef OPENSSL_NO_TLSEXT
2144int ssl3_get_new_session_ticket(SSL *s)
0f113f3e
MC		 2145{
2146 int ok, al, ret = 0, ticklen;
2147 long n;
2148 const unsigned char *p;
2149 unsigned char *d;
2150
2151 n = s->method->ssl_get_message(s,
2152 SSL3_ST_CR_SESSION_TICKET_A,
2153 SSL3_ST_CR_SESSION_TICKET_B,
2154 SSL3_MT_NEWSESSION_TICKET, 16384, &ok);
2155
2156 if (!ok)
2157 return ((int)n);
2158
2159 if (n < 6) {
2160 /* need at least ticket_lifetime_hint + ticket length */
2161 al = SSL_AD_DECODE_ERROR;
2162 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
2163 goto f_err;
2164 }
2165
2166 p = d = (unsigned char *)s->init_msg;
2167 n2l(p, s->session->tlsext_tick_lifetime_hint);
2168 n2s(p, ticklen);
2169 /* ticket_lifetime_hint + ticket_length + ticket */
2170 if (ticklen + 6 != n) {
2171 al = SSL_AD_DECODE_ERROR;
2172 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
2173 goto f_err;
2174 }
2175 if (s->session->tlsext_tick) {
2176 OPENSSL_free(s->session->tlsext_tick);
2177 s->session->tlsext_ticklen = 0;
2178 }
2179 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2180 if (!s->session->tlsext_tick) {
2181 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
2182 goto err;
2183 }
2184 memcpy(s->session->tlsext_tick, p, ticklen);
2185 s->session->tlsext_ticklen = ticklen;
2186 /*
2187 * There are two ways to detect a resumed ticket session. One is to set
2188 * an appropriate session ID and then the server must return a match in
2189 * ServerHello. This allows the normal client session ID matching to work
2190 * and we know much earlier that the ticket has been accepted. The
2191 * other way is to set zero length session ID when the ticket is
2192 * presented and rely on the handshake to determine session resumption.
2193 * We choose the former approach because this fits in with assumptions
2194 * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is
2195 * SHA256 is disabled) hash of the ticket.
2196 */
2197 EVP_Digest(p, ticklen,
2198 s->session->session_id, &s->session->session_id_length,
0f113f3e 2199 EVP_sha256(), NULL);
0f113f3e
MC		 2200 ret = 1;
2201 return (ret);
2202 f_err:
2203 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2204 err:
2205 return (-1);
2206}
67c8e7f4
DSH		 2207
2208int ssl3_get_cert_status(SSL *s)
0f113f3e
MC		 2209{
2210 int ok, al;
2211 unsigned long resplen, n;
2212 const unsigned char *p;
2213
2214 n = s->method->ssl_get_message(s,
2215 SSL3_ST_CR_CERT_STATUS_A,
2216 SSL3_ST_CR_CERT_STATUS_B,
2217 SSL3_MT_CERTIFICATE_STATUS, 16384, &ok);
2218
2219 if (!ok)
2220 return ((int)n);
2221 if (n < 4) {
2222 /* need at least status type + length */
2223 al = SSL_AD_DECODE_ERROR;
2224 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
2225 goto f_err;
2226 }
2227 p = (unsigned char *)s->init_msg;
2228 if (*p++ != TLSEXT_STATUSTYPE_ocsp) {
2229 al = SSL_AD_DECODE_ERROR;
2230 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE);
2231 goto f_err;
2232 }
2233 n2l3(p, resplen);
2234 if (resplen + 4 != n) {
2235 al = SSL_AD_DECODE_ERROR;
2236 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
2237 goto f_err;
2238 }
2239 if (s->tlsext_ocsp_resp)
2240 OPENSSL_free(s->tlsext_ocsp_resp);
2241 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2242 if (!s->tlsext_ocsp_resp) {
2243 al = SSL_AD_INTERNAL_ERROR;
2244 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE);
2245 goto f_err;
2246 }
2247 s->tlsext_ocsp_resplen = resplen;
2248 if (s->ctx->tlsext_status_cb) {
2249 int ret;
2250 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2251 if (ret == 0) {
2252 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2253 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_INVALID_STATUS_RESPONSE);
2254 goto f_err;
2255 }
2256 if (ret < 0) {
2257 al = SSL_AD_INTERNAL_ERROR;
2258 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE);
2259 goto f_err;
2260 }
2261 }
2262 return 1;
2263 f_err:
2264 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2265 return (-1);
2266}
6434abbf 2267#endif
d02b48c6 2268
36d16f8e 2269int ssl3_get_server_done(SSL *s)
0f113f3e
MC		 2270{
2271 int ok, ret = 0;
2272 long n;
2273
2274 /* Second to last param should be very small, like 0 :-) */
2275 n = s->method->ssl_get_message(s,
2276 SSL3_ST_CR_SRVR_DONE_A,
2277 SSL3_ST_CR_SRVR_DONE_B,
2278 SSL3_MT_SERVER_DONE, 30, &ok);
2279
2280 if (!ok)
2281 return ((int)n);
2282 if (n > 0) {
2283 /* should contain no data */
2284 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2285 SSLerr(SSL_F_SSL3_GET_SERVER_DONE, SSL_R_LENGTH_MISMATCH);
2286 return -1;
2287 }
2288 ret = 1;
2289 return (ret);
2290}
176f31dd 2291
36d16f8e 2292int ssl3_send_client_key_exchange(SSL *s)
0f113f3e
MC		 2293{
2294 unsigned char *p;
2295 int n;
2296 unsigned long alg_k;
bc36ee62 2297#ifndef OPENSSL_NO_RSA
0f113f3e
MC		 2298 unsigned char *q;
2299 EVP_PKEY *pkey = NULL;
79df9d62 2300#endif
bc36ee62 2301#ifndef OPENSSL_NO_KRB5
0f113f3e
MC		 2302 KSSL_ERR kssl_err;
2303#endif /* OPENSSL_NO_KRB5 */
10bf4fc2 2304#ifndef OPENSSL_NO_EC
0f113f3e
MC		 2305 EC_KEY *clnt_ecdh = NULL;
2306 const EC_POINT *srvr_ecpoint = NULL;
2307 EVP_PKEY *srvr_pub_pkey = NULL;
2308 unsigned char *encodedPoint = NULL;
2309 int encoded_pt_len = 0;
2310 BN_CTX *bn_ctx = NULL;
ea262260 2311#endif
c660ec63
DSH		 2312 unsigned char *pms = NULL;
2313 size_t pmslen = 0;
d02b48c6 2314
0f113f3e
MC		 2315 if (s->state == SSL3_ST_CW_KEY_EXCH_A) {
2316 p = ssl_handshake_start(s);
d02b48c6 2317
0f113f3e 2318 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
d02b48c6 2319
0f113f3e
MC		 2320 /* Fool emacs indentation */
2321 if (0) {
2322 }
bc36ee62 2323#ifndef OPENSSL_NO_RSA
0f113f3e
MC		 2324 else if (alg_k & SSL_kRSA) {
2325 RSA *rsa;
c660ec63
DSH		 2326 pmslen = SSL_MAX_MASTER_KEY_LENGTH;
2327 pms = OPENSSL_malloc(pmslen);
2328 if (!pms)
2329 goto memerr;
0f113f3e
MC		 2330
2331 if (s->session->sess_cert == NULL) {
2332 /*
2333 * We should always have a server certificate with SSL_kRSA.
2334 */
2335 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2336 ERR_R_INTERNAL_ERROR);
2337 goto err;
2338 }
2339
2340 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2341 rsa = s->session->sess_cert->peer_rsa_tmp;
2342 else {
2343 pkey =
2344 X509_get_pubkey(s->session->
2345 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].
2346 x509);
2347 if ((pkey == NULL) || (pkey->type != EVP_PKEY_RSA)
2348 || (pkey->pkey.rsa == NULL)) {
2349 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2350 ERR_R_INTERNAL_ERROR);
2351 goto err;
2352 }
2353 rsa = pkey->pkey.rsa;
2354 EVP_PKEY_free(pkey);
2355 }
2356
c660ec63
DSH		 2357 pms[0] = s->client_version >> 8;
2358 pms[1] = s->client_version & 0xff;
2359 if (RAND_bytes(pms + 2, pmslen - 2) <= 0)
0f113f3e
MC		 2360 goto err;
2361
0f113f3e
MC		 2362 q = p;
2363 /* Fix buf for TLS and beyond */
2364 if (s->version > SSL3_VERSION)
2365 p += 2;
c660ec63 2366 n = RSA_public_encrypt(pmslen, pms, p, rsa, RSA_PKCS1_PADDING);
0f113f3e
MC		 2367# ifdef PKCS1_CHECK
2368 if (s->options & SSL_OP_PKCS1_CHECK_1)
2369 p[1]++;
2370 if (s->options & SSL_OP_PKCS1_CHECK_2)
2371 tmp_buf[0] = 0x70;
2372# endif
2373 if (n <= 0) {
2374 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2375 SSL_R_BAD_RSA_ENCRYPT);
2376 goto err;
2377 }
2378
2379 /* Fix buf for TLS and beyond */
2380 if (s->version > SSL3_VERSION) {
2381 s2n(n, q);
2382 n += 2;
2383 }
0f113f3e 2384 }
f9b3bff6 2385#endif
bc36ee62 2386#ifndef OPENSSL_NO_KRB5
0f113f3e
MC		 2387 else if (alg_k & SSL_kKRB5) {
2388 krb5_error_code krb5rc;
2389 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2390 /* krb5_data krb5_ap_req; */
2391 krb5_data *enc_ticket;
2392 krb5_data authenticator, *authp = NULL;
2393 EVP_CIPHER_CTX ciph_ctx;
2394 const EVP_CIPHER *enc = NULL;
2395 unsigned char iv[EVP_MAX_IV_LENGTH];
2396 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2397 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH + EVP_MAX_IV_LENGTH];
2398 int padl, outl = sizeof(epms);
2399
2400 EVP_CIPHER_CTX_init(&ciph_ctx);
2401
2402# ifdef KSSL_DEBUG
2403 fprintf(stderr, "ssl3_send_client_key_exchange(%lx & %lx)\n",
2404 alg_k, SSL_kKRB5);
2405# endif /* KSSL_DEBUG */
2406
2407 authp = NULL;
2408# ifdef KRB5SENDAUTH
2409 if (KRB5SENDAUTH)
2410 authp = &authenticator;
2411# endif /* KRB5SENDAUTH */
2412
2413 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, &kssl_err);
2414 enc = kssl_map_enc(kssl_ctx->enctype);
2415 if (enc == NULL)
2416 goto err;
2417# ifdef KSSL_DEBUG
2418 {
2419 fprintf(stderr, "kssl_cget_tkt rtn %d\n", krb5rc);
2420 if (krb5rc && kssl_err.text)
2421 fprintf(stderr, "kssl_cget_tkt kssl_err=%s\n",
2422 kssl_err.text);
2423 }
2424# endif /* KSSL_DEBUG */
2425
2426 if (krb5rc) {
2427 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2428 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, kssl_err.reason);
2429 goto err;
2430 }
2431
50e735f9
MC		 2432 /*-
2433 * 20010406 VRS - Earlier versions used KRB5 AP_REQ
2434 * in place of RFC 2712 KerberosWrapper, as in:
2435 *
2436 * Send ticket (copy to *p, set n = length)
2437 * n = krb5_ap_req.length;
2438 * memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2439 * if (krb5_ap_req.data)
2440 * kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2441 *
2442 * Now using real RFC 2712 KerberosWrapper
2443 * (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2444 * Note: 2712 "opaque" types are here replaced
2445 * with a 2-byte length followed by the value.
2446 * Example:
2447 * KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2448 * Where "xx xx" = length bytes. Shown here with
2449 * optional authenticator omitted.
2450 */
0f113f3e
MC		 2451
2452 /* KerberosWrapper.Ticket */
2453 s2n(enc_ticket->length, p);
2454 memcpy(p, enc_ticket->data, enc_ticket->length);
2455 p += enc_ticket->length;
2456 n = enc_ticket->length + 2;
2457
2458 /* KerberosWrapper.Authenticator */
2459 if (authp && authp->length) {
2460 s2n(authp->length, p);
2461 memcpy(p, authp->data, authp->length);
2462 p += authp->length;
2463 n += authp->length + 2;
2464
2465 free(authp->data);
2466 authp->data = NULL;
2467 authp->length = 0;
2468 } else {
2469 s2n(0, p); /* null authenticator length */
2470 n += 2;
2471 }
2472
c660ec63
DSH		 2473 pmslen = SSL_MAX_MASTER_KEY_LENGTH;
2474 pms = OPENSSL_malloc(pmslen);
2475 if (!pms)
2476 goto memerr;
2477
2478 pms[0] = s->client_version >> 8;
2479 pms[1] = s->client_version & 0xff;
2480 if (RAND_bytes(pms + 2, pmslen - 2) <= 0)
0f113f3e
MC		 2481 goto err;
2482
35a1cc90
MC		 2483 /*-
2484 * 20010420 VRS. Tried it this way; failed.
2485 * EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2486 * EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2487 * kssl_ctx->length);
2488 * EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2489 */
0f113f3e
MC		 2490
2491 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2492 EVP_EncryptInit_ex(&ciph_ctx, enc, NULL, kssl_ctx->key, iv);
c660ec63 2493 EVP_EncryptUpdate(&ciph_ctx, epms, &outl, pms, pmslen);
0f113f3e
MC		 2494 EVP_EncryptFinal_ex(&ciph_ctx, &(epms[outl]), &padl);
2495 outl += padl;
2496 if (outl > (int)sizeof epms) {
2497 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2498 ERR_R_INTERNAL_ERROR);
2499 goto err;
2500 }
2501 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2502
2503 /* KerberosWrapper.EncryptedPreMasterSecret */
2504 s2n(outl, p);
2505 memcpy(p, epms, outl);
2506 p += outl;
2507 n += outl + 2;
0f113f3e
MC		 2508 OPENSSL_cleanse(epms, outl);
2509 }
d02b48c6 2510#endif
bc36ee62 2511#ifndef OPENSSL_NO_DH
0f113f3e
MC		 2512 else if (alg_k & (SSL_kDHE | SSL_kDHr | SSL_kDHd)) {
2513 DH *dh_srvr, *dh_clnt;
2514 SESS_CERT *scert = s->session->sess_cert;
2515
2516 if (scert == NULL) {
2517 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
2518 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2519 SSL_R_UNEXPECTED_MESSAGE);
2520 goto err;
2521 }
2522
2523 if (scert->peer_dh_tmp != NULL)
2524 dh_srvr = scert->peer_dh_tmp;
2525 else {
2526 /* we get them from the cert */
2527 int idx = scert->peer_cert_type;
2528 EVP_PKEY *spkey = NULL;
2529 dh_srvr = NULL;
2530 if (idx >= 0)
2531 spkey = X509_get_pubkey(scert->peer_pkeys[idx].x509);
2532 if (spkey) {
2533 dh_srvr = EVP_PKEY_get1_DH(spkey);
2534 EVP_PKEY_free(spkey);
2535 }
2536 if (dh_srvr == NULL) {
2537 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2538 ERR_R_INTERNAL_ERROR);
2539 goto err;
2540 }
2541 }
2542 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
2543 /* Use client certificate key */
2544 EVP_PKEY *clkey = s->cert->key->privatekey;
2545 dh_clnt = NULL;
2546 if (clkey)
2547 dh_clnt = EVP_PKEY_get1_DH(clkey);
2548 if (dh_clnt == NULL) {
2549 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2550 ERR_R_INTERNAL_ERROR);
2551 goto err;
2552 }
2553 } else {
2554 /* generate a new random key */
2555 if ((dh_clnt = DHparams_dup(dh_srvr)) == NULL) {
2556 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
2557 goto err;
2558 }
2559 if (!DH_generate_key(dh_clnt)) {
2560 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
2561 DH_free(dh_clnt);
2562 goto err;
2563 }
2564 }
2565
c660ec63
DSH		 2566 pmslen = DH_size(dh_clnt);
2567 pms = OPENSSL_malloc(pmslen);
2568 if (!pms)
2569 goto memerr;
2570
0f113f3e
MC		 2571 /*
2572 * use the 'p' output buffer for the DH key, but make sure to
2573 * clear it out afterwards
2574 */
2575
c660ec63 2576 n = DH_compute_key(pms, dh_srvr->pub_key, dh_clnt);
0f113f3e
MC		 2577 if (scert->peer_dh_tmp == NULL)
2578 DH_free(dh_srvr);
2579
2580 if (n <= 0) {
2581 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
2582 DH_free(dh_clnt);
2583 goto err;
2584 }
6b937f8b 2585 pmslen = n;
0f113f3e 2586
0f113f3e
MC		 2587 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2588 n = 0;
2589 else {
2590 /* send off the data */
2591 n = BN_num_bytes(dh_clnt->pub_key);
2592 s2n(n, p);
2593 BN_bn2bin(dh_clnt->pub_key, p);
2594 n += 2;
2595 }
2596
2597 DH_free(dh_clnt);
2598
2599 /* perhaps clean things up a bit EAY EAY EAY EAY */
2600 }
d02b48c6 2601#endif
ea262260 2602
10bf4fc2 2603#ifndef OPENSSL_NO_EC
0f113f3e
MC		 2604 else if (alg_k & (SSL_kECDHE | SSL_kECDHr | SSL_kECDHe)) {
2605 const EC_GROUP *srvr_group = NULL;
2606 EC_KEY *tkey;
2607 int ecdh_clnt_cert = 0;
2608 int field_size = 0;
2609
2610 if (s->session->sess_cert == NULL) {
2611 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
2612 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2613 SSL_R_UNEXPECTED_MESSAGE);
2614 goto err;
2615 }
2616
2617 /*
2618 * Did we send out the client's ECDH share for use in premaster
2619 * computation as part of client certificate? If so, set
2620 * ecdh_clnt_cert to 1.
2621 */
2622 if ((alg_k & (SSL_kECDHr | SSL_kECDHe)) && (s->cert != NULL)) {
50e735f9
MC		 2623 /*-
2624 * XXX: For now, we do not support client
2625 * authentication using ECDH certificates.
2626 * To add such support, one needs to add
2627 * code that checks for appropriate
2628 * conditions and sets ecdh_clnt_cert to 1.
2629 * For example, the cert have an ECC
2630 * key on the same curve as the server's
2631 * and the key should be authorized for
2632 * key agreement.
2633 *
2634 * One also needs to add code in ssl3_connect
2635 * to skip sending the certificate verify
2636 * message.
2637 *
2638 * if ((s->cert->key->privatekey != NULL) &&
2639 * (s->cert->key->privatekey->type ==
2640 * EVP_PKEY_EC) && ...)
2641 * ecdh_clnt_cert = 1;
2642 */
0f113f3e
MC		 2643 }
2644
2645 if (s->session->sess_cert->peer_ecdh_tmp != NULL) {
2646 tkey = s->session->sess_cert->peer_ecdh_tmp;
2647 } else {
2648 /* Get the Server Public Key from Cert */
2649 srvr_pub_pkey =
2650 X509_get_pubkey(s->session->
2651 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2652 if ((srvr_pub_pkey == NULL)
2653 || (srvr_pub_pkey->type != EVP_PKEY_EC)
2654 || (srvr_pub_pkey->pkey.ec == NULL)) {
2655 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2656 ERR_R_INTERNAL_ERROR);
2657 goto err;
2658 }
2659
2660 tkey = srvr_pub_pkey->pkey.ec;
2661 }
2662
2663 srvr_group = EC_KEY_get0_group(tkey);
2664 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2665
2666 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) {
2667 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2668 ERR_R_INTERNAL_ERROR);
2669 goto err;
2670 }
2671
2672 if ((clnt_ecdh = EC_KEY_new()) == NULL) {
2673 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2674 ERR_R_MALLOC_FAILURE);
2675 goto err;
2676 }
2677
2678 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) {
2679 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
2680 goto err;
2681 }
2682 if (ecdh_clnt_cert) {
2683 /*
2684 * Reuse key info from our certificate We only need our
2685 * private key to perform the ECDH computation.
2686 */
2687 const BIGNUM *priv_key;
2688 tkey = s->cert->key->privatekey->pkey.ec;
2689 priv_key = EC_KEY_get0_private_key(tkey);
2690 if (priv_key == NULL) {
2691 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2692 ERR_R_MALLOC_FAILURE);
2693 goto err;
2694 }
2695 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) {
2696 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
2697 goto err;
2698 }
2699 } else {
2700 /* Generate a new ECDH key pair */
2701 if (!(EC_KEY_generate_key(clnt_ecdh))) {
2702 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2703 ERR_R_ECDH_LIB);
2704 goto err;
2705 }
2706 }
2707
2708 /*
2709 * use the 'p' output buffer for the ECDH key, but make sure to
2710 * clear it out afterwards
2711 */
2712
2713 field_size = EC_GROUP_get_degree(srvr_group);
2714 if (field_size <= 0) {
2715 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2716 goto err;
2717 }
c660ec63
DSH		 2718 pmslen = (field_size + 7) / 8;
2719 pms = OPENSSL_malloc(pmslen);
2720 if (!pms)
2721 goto memerr;
2722 n = ECDH_compute_key(pms, pmslen, srvr_ecpoint, clnt_ecdh, NULL);
2723 if (n <= 0 || pmslen != (size_t)n) {
0f113f3e
MC		 2724 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2725 goto err;
2726 }
2727
0f113f3e
MC		 2728 if (ecdh_clnt_cert) {
2729 /* Send empty client key exch message */
2730 n = 0;
2731 } else {
2732 /*
2733 * First check the size of encoding and allocate memory
2734 * accordingly.
2735 */
2736 encoded_pt_len =
2737 EC_POINT_point2oct(srvr_group,
2738 EC_KEY_get0_public_key(clnt_ecdh),
2739 POINT_CONVERSION_UNCOMPRESSED,
2740 NULL, 0, NULL);
2741
2742 encodedPoint = (unsigned char *)
2743 OPENSSL_malloc(encoded_pt_len * sizeof(unsigned char));
2744 bn_ctx = BN_CTX_new();
2745 if ((encodedPoint == NULL) || (bn_ctx == NULL)) {
2746 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2747 ERR_R_MALLOC_FAILURE);
2748 goto err;
2749 }
2750
2751 /* Encode the public key */
2752 n = EC_POINT_point2oct(srvr_group,
2753 EC_KEY_get0_public_key(clnt_ecdh),
2754 POINT_CONVERSION_UNCOMPRESSED,
2755 encodedPoint, encoded_pt_len, bn_ctx);
2756
2757 *p = n; /* length of encoded point */
2758 /* Encoded point will be copied here */
2759 p += 1;
2760 /* copy the point */
2761 memcpy((unsigned char *)p, encodedPoint, n);
2762 /* increment n to account for length field */
2763 n += 1;
2764 }
2765
2766 /* Free allocated memory */
2767 BN_CTX_free(bn_ctx);
2768 if (encodedPoint != NULL)
2769 OPENSSL_free(encodedPoint);
2770 if (clnt_ecdh != NULL)
2771 EC_KEY_free(clnt_ecdh);
2772 EVP_PKEY_free(srvr_pub_pkey);
2773 }
10bf4fc2 2774#endif /* !OPENSSL_NO_EC */
0f113f3e
MC		 2775 else if (alg_k & SSL_kGOST) {
2776 /* GOST key exchange message creation */
2777 EVP_PKEY_CTX *pkey_ctx;
2778 X509 *peer_cert;
2779 size_t msglen;
2780 unsigned int md_len;
2781 int keytype;
c660ec63 2782 unsigned char shared_ukm[32], tmp[256];
0f113f3e
MC		 2783 EVP_MD_CTX *ukm_hash;
2784 EVP_PKEY *pub_key;
2785
c660ec63
DSH		 2786 pmslen = 32;
2787 pms = OPENSSL_malloc(pmslen);
2788 if (!pms)
2789 goto memerr;
2790
0f113f3e
MC		 2791 /*
2792 * Get server sertificate PKEY and create ctx from it
2793 */
2794 peer_cert =
2795 s->session->
2796 sess_cert->peer_pkeys[(keytype = SSL_PKEY_GOST01)].x509;
2797 if (!peer_cert)
2798 peer_cert =
2799 s->session->
2800 sess_cert->peer_pkeys[(keytype = SSL_PKEY_GOST94)].x509;
2801 if (!peer_cert) {
2802 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2803 SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2804 goto err;
2805 }
2806
2807 pkey_ctx = EVP_PKEY_CTX_new(pub_key =
2808 X509_get_pubkey(peer_cert), NULL);
2809 /*
2810 * If we have send a certificate, and certificate key
2811 *
2812 * * parameters match those of server certificate, use
2813 * certificate key for key exchange
2814 */
2815
2816 /* Otherwise, generate ephemeral key pair */
2817
2818 EVP_PKEY_encrypt_init(pkey_ctx);
2819 /* Generate session key */
c660ec63 2820 RAND_bytes(pms, pmslen);
0f113f3e
MC		 2821 /*
2822 * If we have client certificate, use its secret as peer key
2823 */
2824 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2825 if (EVP_PKEY_derive_set_peer
2826 (pkey_ctx, s->cert->key->privatekey) <= 0) {
2827 /*
2828 * If there was an error - just ignore it. Ephemeral key
2829 * * would be used
2830 */
2831 ERR_clear_error();
2832 }
2833 }
2834 /*
2835 * Compute shared IV and store it in algorithm-specific context
2836 * data
2837 */
2838 ukm_hash = EVP_MD_CTX_create();
2839 EVP_DigestInit(ukm_hash,
2840 EVP_get_digestbynid(NID_id_GostR3411_94));
2841 EVP_DigestUpdate(ukm_hash, s->s3->client_random,
2842 SSL3_RANDOM_SIZE);
2843 EVP_DigestUpdate(ukm_hash, s->s3->server_random,
2844 SSL3_RANDOM_SIZE);
2845 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2846 EVP_MD_CTX_destroy(ukm_hash);
2847 if (EVP_PKEY_CTX_ctrl
2848 (pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, EVP_PKEY_CTRL_SET_IV, 8,
2849 shared_ukm) < 0) {
2850 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2851 SSL_R_LIBRARY_BUG);
2852 goto err;
2853 }
2854 /* Make GOST keytransport blob message */
2855 /*
2856 * Encapsulate it into sequence
2857 */
2858 *(p++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2859 msglen = 255;
c660ec63 2860 if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) < 0) {
0f113f3e
MC		 2861 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2862 SSL_R_LIBRARY_BUG);
2863 goto err;
2864 }
2865 if (msglen >= 0x80) {
2866 *(p++) = 0x81;
2867 *(p++) = msglen & 0xff;
2868 n = msglen + 3;
2869 } else {
2870 *(p++) = msglen & 0xff;
2871 n = msglen + 2;
2872 }
2873 memcpy(p, tmp, msglen);
2874 /* Check if pubkey from client certificate was used */
2875 if (EVP_PKEY_CTX_ctrl
2876 (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) {
2877 /* Set flag "skip certificate verify" */
2878 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2879 }
2880 EVP_PKEY_CTX_free(pkey_ctx);
0f113f3e
MC		 2881 EVP_PKEY_free(pub_key);
2882
2883 }
edc032b5 2884#ifndef OPENSSL_NO_SRP
0f113f3e
MC		 2885 else if (alg_k & SSL_kSRP) {
2886 if (s->srp_ctx.A != NULL) {
2887 /* send off the data */
2888 n = BN_num_bytes(s->srp_ctx.A);
2889 s2n(n, p);
2890 BN_bn2bin(s->srp_ctx.A, p);
2891 n += 2;
2892 } else {
2893 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2894 ERR_R_INTERNAL_ERROR);
2895 goto err;
2896 }
2897 if (s->session->srp_username != NULL)
2898 OPENSSL_free(s->session->srp_username);
2899 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2900 if (s->session->srp_username == NULL) {
2901 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2902 ERR_R_MALLOC_FAILURE);
2903 goto err;
2904 }
0f113f3e 2905 }
edc032b5 2906#endif
ddac1974 2907#ifndef OPENSSL_NO_PSK
0f113f3e
MC		 2908 else if (alg_k & SSL_kPSK) {
2909 /*
2910 * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a
2911 * \0-terminated identity. The last byte is for us for simulating
2912 * strnlen.
2913 */
2914 char identity[PSK_MAX_IDENTITY_LEN + 2];
2915 size_t identity_len;
2916 unsigned char *t = NULL;
c660ec63 2917 unsigned int psk_len = 0;
0f113f3e
MC		 2918 int psk_err = 1;
2919
2920 n = 0;
2921 if (s->psk_client_callback == NULL) {
2922 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2923 SSL_R_PSK_NO_CLIENT_CB);
2924 goto err;
2925 }
2926
2927 memset(identity, 0, sizeof(identity));
c660ec63
DSH		 2928 /* Allocate maximum size buffer */
2929 pmslen = PSK_MAX_PSK_LEN * 2 + 4;
2930 pms = OPENSSL_malloc(pmslen);
2931 if (!pms)
2932 goto memerr;
2933
0f113f3e
MC		 2934 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
2935 identity, sizeof(identity) - 1,
c660ec63 2936 pms, pmslen);
0f113f3e
MC		 2937 if (psk_len > PSK_MAX_PSK_LEN) {
2938 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2939 ERR_R_INTERNAL_ERROR);
2940 goto psk_err;
2941 } else if (psk_len == 0) {
2942 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2943 SSL_R_PSK_IDENTITY_NOT_FOUND);
2944 goto psk_err;
2945 }
c660ec63
DSH		 2946 /* Change pmslen to real length */
2947 pmslen = 2 + psk_len + 2 + psk_len;
0f113f3e
MC		 2948 identity[PSK_MAX_IDENTITY_LEN + 1] = '\0';
2949 identity_len = strlen(identity);
2950 if (identity_len > PSK_MAX_IDENTITY_LEN) {
2951 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2952 ERR_R_INTERNAL_ERROR);
2953 goto psk_err;
2954 }
2955 /* create PSK pre_master_secret */
c660ec63
DSH		 2956 t = pms;
2957 memmove(pms + psk_len + 4, pms, psk_len);
0f113f3e
MC		 2958 s2n(psk_len, t);
2959 memset(t, 0, psk_len);
2960 t += psk_len;
2961 s2n(psk_len, t);
2962
2963 if (s->session->psk_identity_hint != NULL)
2964 OPENSSL_free(s->session->psk_identity_hint);
2965 s->session->psk_identity_hint =
2966 BUF_strdup(s->ctx->psk_identity_hint);
2967 if (s->ctx->psk_identity_hint != NULL
2968 && s->session->psk_identity_hint == NULL) {
2969 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2970 ERR_R_MALLOC_FAILURE);
2971 goto psk_err;
2972 }
2973
2974 if (s->session->psk_identity != NULL)
2975 OPENSSL_free(s->session->psk_identity);
2976 s->session->psk_identity = BUF_strdup(identity);
2977 if (s->session->psk_identity == NULL) {
2978 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2979 ERR_R_MALLOC_FAILURE);
2980 goto psk_err;
2981 }
2982
0f113f3e
MC		 2983 s2n(identity_len, p);
2984 memcpy(p, identity, identity_len);
2985 n = 2 + identity_len;
2986 psk_err = 0;
2987 psk_err:
2988 OPENSSL_cleanse(identity, sizeof(identity));
0f113f3e
MC		 2989 if (psk_err != 0) {
2990 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2991 goto err;
2992 }
2993 }
2994#endif
2995 else {
2996 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2997 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2998 goto err;
2999 }
3000
3001 ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n);
3002 s->state = SSL3_ST_CW_KEY_EXCH_B;
3003 }
3004
3005 /* SSL3_ST_CW_KEY_EXCH_B */
c660ec63
DSH		 3006 n = ssl_do_write(s);
3007#ifndef OPENSSL_NO_SRP
3008 /* Check for SRP */
3009 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
3010 /*
3011 * If everything written generate master key: no need to save PMS as
3012 * SRP_generate_client_master_secret generates it internally.
3013 */
3014 if (n > 0) {
3015 if ((s->session->master_key_length =
3016 SRP_generate_client_master_secret(s,
3017 s->session->master_key)) <
3018 0) {
3019 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3020 ERR_R_INTERNAL_ERROR);
3021 goto err;
3022 }
3023 }
3024 } else
3025#endif
3026 /* If we haven't written everything save PMS */
3027 if (n <= 0) {
3028 s->cert->pms = pms;
3029 s->cert->pmslen = pmslen;
3030 } else {
3031 /* If we don't have a PMS restore */
3032 if (pms == NULL) {
3033 pms = s->cert->pms;
3034 pmslen = s->cert->pmslen;
3035 }
3036 if (pms == NULL) {
3037 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
3038 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
3039 goto err;
3040 }
3041 s->session->master_key_length =
3042 s->method->ssl3_enc->generate_master_secret(s,
3043 s->
3044 session->master_key,
3045 pms, pmslen);
3046 OPENSSL_cleanse(pms, pmslen);
3047 OPENSSL_free(pms);
3048 s->cert->pms = NULL;
69f68237
MC		 3049 if(s->session->master_key_length < 0) {
3050 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
3051 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
3052 goto err;
3053 }
c660ec63
DSH		 3054 }
3055 return n;
3056 memerr:
3057 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
3058 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
0f113f3e 3059 err:
c660ec63
DSH		 3060 if (pms) {
3061 OPENSSL_cleanse(pms, pmslen);
3062 OPENSSL_free(pms);
3063 s->cert->pms = NULL;
3064 }
10bf4fc2 3065#ifndef OPENSSL_NO_EC
0f113f3e
MC		 3066 BN_CTX_free(bn_ctx);
3067 if (encodedPoint != NULL)
3068 OPENSSL_free(encodedPoint);
3069 if (clnt_ecdh != NULL)
3070 EC_KEY_free(clnt_ecdh);
3071 EVP_PKEY_free(srvr_pub_pkey);
3072#endif
3073 return (-1);
3074}
d02b48c6 3075
36d16f8e 3076int ssl3_send_client_verify(SSL *s)
0f113f3e
MC		 3077{
3078 unsigned char *p;
3079 unsigned char data[MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH];
3080 EVP_PKEY *pkey;
3081 EVP_PKEY_CTX *pctx = NULL;
3082 EVP_MD_CTX mctx;
3083 unsigned u = 0;
3084 unsigned long n;
3085 int j;
3086
3087 EVP_MD_CTX_init(&mctx);
3088
3089 if (s->state == SSL3_ST_CW_CERT_VRFY_A) {
3090 p = ssl_handshake_start(s);
3091 pkey = s->cert->key->privatekey;
0e1dba93 3092/* Create context from key and test if sha1 is allowed as digest */
0f113f3e
MC		 3093 pctx = EVP_PKEY_CTX_new(pkey, NULL);
3094 EVP_PKEY_sign_init(pctx);
3095 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1()) > 0) {
3096 if (!SSL_USE_SIGALGS(s))
3097 s->method->ssl3_enc->cert_verify_mac(s,
3098 NID_sha1,
3099 &(data
3100 [MD5_DIGEST_LENGTH]));
3101 } else {
3102 ERR_clear_error();
3103 }
3104 /*
3105 * For TLS v1.2 send signature algorithm and signature using agreed
3106 * digest and cached handshake records.
3107 */
3108 if (SSL_USE_SIGALGS(s)) {
3109 long hdatalen = 0;
3110 void *hdata;
3111 const EVP_MD *md = s->cert->key->digest;
3112 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
3113 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) {
3114 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
3115 goto err;
3116 }
3117 p += 2;
855a54a9 3118#ifdef SSL_DEBUG
0f113f3e
MC		 3119 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
3120 EVP_MD_name(md));
3121#endif
3122 if (!EVP_SignInit_ex(&mctx, md, NULL)
3123 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3124 || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) {
3125 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_EVP_LIB);
3126 goto err;
3127 }
3128 s2n(u, p);
3129 n = u + 4;
0cfb0e75
DSH		 3130 /*
3131 * For extended master secret we've already digested cached
3132 * records.
3133 */
3134 if (s->session->flags & SSL_SESS_FLAG_EXTMS) {
3135 BIO_free(s->s3->handshake_buffer);
3136 s->s3->handshake_buffer = NULL;
3137 s->s3->flags &= ~TLS1_FLAGS_KEEP_HANDSHAKE;
3138 } else if (!ssl3_digest_cached_records(s))
0f113f3e
MC		 3139 goto err;
3140 } else
bc36ee62 3141#ifndef OPENSSL_NO_RSA
0f113f3e
MC		 3142 if (pkey->type == EVP_PKEY_RSA) {
3143 s->method->ssl3_enc->cert_verify_mac(s, NID_md5, &(data[0]));
3144 if (RSA_sign(NID_md5_sha1, data,
3145 MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH,
3146 &(p[2]), &u, pkey->pkey.rsa) <= 0) {
3147 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_RSA_LIB);
3148 goto err;
3149 }
3150 s2n(u, p);
3151 n = u + 2;
3152 } else
d02b48c6 3153#endif
bc36ee62 3154#ifndef OPENSSL_NO_DSA
0f113f3e
MC		 3155 if (pkey->type == EVP_PKEY_DSA) {
3156 if (!DSA_sign(pkey->save_type,
3157 &(data[MD5_DIGEST_LENGTH]),
3158 SHA_DIGEST_LENGTH, &(p[2]),
3159 (unsigned int *)&j, pkey->pkey.dsa)) {
3160 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_DSA_LIB);
3161 goto err;
3162 }
3163 s2n(j, p);
3164 n = j + 2;
3165 } else
ea262260 3166#endif
10bf4fc2 3167#ifndef OPENSSL_NO_EC
0f113f3e
MC		 3168 if (pkey->type == EVP_PKEY_EC) {
3169 if (!ECDSA_sign(pkey->save_type,
3170 &(data[MD5_DIGEST_LENGTH]),
3171 SHA_DIGEST_LENGTH, &(p[2]),
3172 (unsigned int *)&j, pkey->pkey.ec)) {
3173 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_ECDSA_LIB);
3174 goto err;
3175 }
3176 s2n(j, p);
3177 n = j + 2;
3178 } else
3179#endif
3180 if (pkey->type == NID_id_GostR3410_94
3181 || pkey->type == NID_id_GostR3410_2001) {
3182 unsigned char signbuf[64];
3183 int i;
3184 size_t sigsize = 64;
3185 s->method->ssl3_enc->cert_verify_mac(s,
3186 NID_id_GostR3411_94, data);
3187 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3188 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
3189 goto err;
3190 }
3191 for (i = 63, j = 0; i >= 0; j++, i--) {
3192 p[2 + j] = signbuf[i];
3193 }
3194 s2n(j, p);
3195 n = j + 2;
3196 } else {
3197 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
3198 goto err;
3199 }
3200 ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n);
3201 s->state = SSL3_ST_CW_CERT_VRFY_B;
3202 }
3203 EVP_MD_CTX_cleanup(&mctx);
3204 EVP_PKEY_CTX_free(pctx);
3205 return ssl_do_write(s);
3206 err:
3207 EVP_MD_CTX_cleanup(&mctx);
3208 EVP_PKEY_CTX_free(pctx);
3209 return (-1);
3210}
3211
3212/*
3213 * Check a certificate can be used for client authentication. Currently check
3214 * cert exists, if we have a suitable digest for TLS 1.2 if static DH client
3215 * certificates can be used and optionally checks suitability for Suite B.
0d609395
DSH		 3216 */
3217static int ssl3_check_client_certificate(SSL *s)
0f113f3e
MC		 3218{
3219 unsigned long alg_k;
3220 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
3221 return 0;
3222 /* If no suitable signature algorithm can't use certificate */
3223 if (SSL_USE_SIGALGS(s) && !s->cert->key->digest)
3224 return 0;
3225 /*
3226 * If strict mode check suitability of chain before using it. This also
3227 * adjusts suite B digest if necessary.
3228 */
3229 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
3230 !tls1_check_chain(s, NULL, NULL, NULL, -2))
3231 return 0;
3232 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
3233 /* See if we can use client certificate for fixed DH */
3234 if (alg_k & (SSL_kDHr | SSL_kDHd)) {
3235 SESS_CERT *scert = s->session->sess_cert;
3236 int i = scert->peer_cert_type;
3237 EVP_PKEY *clkey = NULL, *spkey = NULL;
3238 clkey = s->cert->key->privatekey;
3239 /* If client key not DH assume it can be used */
3240 if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
3241 return 1;
3242 if (i >= 0)
3243 spkey = X509_get_pubkey(scert->peer_pkeys[i].x509);
3244 if (spkey) {
3245 /* Compare server and client parameters */
3246 i = EVP_PKEY_cmp_parameters(clkey, spkey);
3247 EVP_PKEY_free(spkey);
3248 if (i != 1)
3249 return 0;
3250 }
3251 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3252 }
3253 return 1;
3254}
0d609395 3255
36d16f8e 3256int ssl3_send_client_certificate(SSL *s)
0f113f3e
MC		 3257{
3258 X509 *x509 = NULL;
3259 EVP_PKEY *pkey = NULL;
3260 int i;
3261
3262 if (s->state == SSL3_ST_CW_CERT_A) {
3263 /* Let cert callback update client certificates if required */
3264 if (s->cert->cert_cb) {
3265 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
3266 if (i < 0) {
3267 s->rwstate = SSL_X509_LOOKUP;
3268 return -1;
3269 }
3270 if (i == 0) {
3271 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
3272 return 0;
3273 }
3274 s->rwstate = SSL_NOTHING;
3275 }
3276 if (ssl3_check_client_certificate(s))
3277 s->state = SSL3_ST_CW_CERT_C;
3278 else
3279 s->state = SSL3_ST_CW_CERT_B;
3280 }
3281
3282 /* We need to get a client cert */
3283 if (s->state == SSL3_ST_CW_CERT_B) {
3284 /*
3285 * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP;
3286 * return(-1); We then get retied later
3287 */
3288 i = 0;
3289 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3290 if (i < 0) {
3291 s->rwstate = SSL_X509_LOOKUP;
3292 return (-1);
3293 }
3294 s->rwstate = SSL_NOTHING;
3295 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) {
3296 s->state = SSL3_ST_CW_CERT_B;
3297 if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey))
3298 i = 0;
3299 } else if (i == 1) {
3300 i = 0;
3301 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,
3302 SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3303 }
3304
3305 if (x509 != NULL)
3306 X509_free(x509);
3307 if (pkey != NULL)
3308 EVP_PKEY_free(pkey);
3309 if (i && !ssl3_check_client_certificate(s))
3310 i = 0;
3311 if (i == 0) {
3312 if (s->version == SSL3_VERSION) {
3313 s->s3->tmp.cert_req = 0;
3314 ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE);
3315 return (1);
3316 } else {
3317 s->s3->tmp.cert_req = 2;
3318 }
3319 }
3320
3321 /* Ok, we have a cert */
3322 s->state = SSL3_ST_CW_CERT_C;
3323 }
3324
3325 if (s->state == SSL3_ST_CW_CERT_C) {
3326 s->state = SSL3_ST_CW_CERT_D;
3327 if (!ssl3_output_cert_chain(s,
3328 (s->s3->tmp.cert_req ==
3329 2) ? NULL : s->cert->key)) {
3330 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
3331 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
3332 return 0;
3333 }
3334 }
3335 /* SSL3_ST_CW_CERT_D */
3336 return ssl_do_write(s);
3337}
3338
3339#define has_bits(i,m) (((i)&(m)) == (m))
d02b48c6 3340
36d16f8e 3341int ssl3_check_cert_and_algorithm(SSL *s)
0f113f3e
MC		 3342{
3343 int i, idx;
3344 long alg_k, alg_a;
3345 EVP_PKEY *pkey = NULL;
3346 SESS_CERT *sc;
bc36ee62 3347#ifndef OPENSSL_NO_RSA
0f113f3e 3348 RSA *rsa;
79df9d62 3349#endif
bc36ee62 3350#ifndef OPENSSL_NO_DH
0f113f3e 3351 DH *dh;
79df9d62 3352#endif
d02b48c6 3353
0f113f3e
MC		 3354 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
3355 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
d02b48c6 3356
0f113f3e
MC		 3357 /* we don't have a certificate */
3358 if ((alg_a & (SSL_aNULL | SSL_aKRB5)) || (alg_k & SSL_kPSK))
3359 return (1);
c1ca9d32 3360
0f113f3e
MC		 3361 sc = s->session->sess_cert;
3362 if (sc == NULL) {
3363 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
3364 goto err;
3365 }
bc36ee62 3366#ifndef OPENSSL_NO_RSA
0f113f3e 3367 rsa = s->session->sess_cert->peer_rsa_tmp;
79df9d62 3368#endif
bc36ee62 3369#ifndef OPENSSL_NO_DH
0f113f3e 3370 dh = s->session->sess_cert->peer_dh_tmp;
79df9d62 3371#endif
d02b48c6 3372
0f113f3e 3373 /* This is the passed certificate */
d02b48c6 3374
0f113f3e 3375 idx = sc->peer_cert_type;
10bf4fc2 3376#ifndef OPENSSL_NO_EC
0f113f3e
MC		 3377 if (idx == SSL_PKEY_ECC) {
3378 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, s) == 0) {
3379 /* check failed */
3380 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT);
3381 goto f_err;
3382 } else {
3383 return 1;
3384 }
3385 } else if (alg_a & SSL_aECDSA) {
3386 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3387 SSL_R_MISSING_ECDSA_SIGNING_CERT);
3388 goto f_err;
3389 } else if (alg_k & (SSL_kECDHr | SSL_kECDHe)) {
3390 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_ECDH_CERT);
3391 goto f_err;
3392 }
3393#endif
3394 pkey = X509_get_pubkey(sc->peer_pkeys[idx].x509);
3395 i = X509_certificate_type(sc->peer_pkeys[idx].x509, pkey);
3396 EVP_PKEY_free(pkey);
3397
3398 /* Check that we have a certificate if we require one */
3399 if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) {
3400 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3401 SSL_R_MISSING_RSA_SIGNING_CERT);
3402 goto f_err;
3403 }
bc36ee62 3404#ifndef OPENSSL_NO_DSA
0f113f3e
MC		 3405 else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) {
3406 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3407 SSL_R_MISSING_DSA_SIGNING_CERT);
3408 goto f_err;
3409 }
d02b48c6 3410#endif
bc36ee62 3411#ifndef OPENSSL_NO_RSA
0f113f3e
MC		 3412 if ((alg_k & SSL_kRSA) &&
3413 !(has_bits(i, EVP_PK_RSA | EVP_PKT_ENC) || (rsa != NULL))) {
3414 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3415 SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3416 goto f_err;
3417 }
79df9d62 3418#endif
bc36ee62 3419#ifndef OPENSSL_NO_DH
0f113f3e
MC		 3420 if ((alg_k & SSL_kDHE) &&
3421 !(has_bits(i, EVP_PK_DH | EVP_PKT_EXCH) || (dh != NULL))) {
3422 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_DH_KEY);
3423 goto f_err;
3424 } else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) &&
3425 !has_bits(i, EVP_PK_DH | EVP_PKS_RSA)) {
3426 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3427 SSL_R_MISSING_DH_RSA_CERT);
3428 goto f_err;
3429 }
3430# ifndef OPENSSL_NO_DSA
3431 else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) &&
3432 !has_bits(i, EVP_PK_DH | EVP_PKS_DSA)) {
3433 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3434 SSL_R_MISSING_DH_DSA_CERT);
3435 goto f_err;
3436 }
3437# endif
d02b48c6
RE		 3438#endif
3439
0f113f3e 3440 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i, EVP_PKT_EXP)) {
bc36ee62 3441#ifndef OPENSSL_NO_RSA
0f113f3e
MC		 3442 if (alg_k & SSL_kRSA) {
3443 if (rsa == NULL
3444 || RSA_size(rsa) * 8 >
3445 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
3446 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3447 SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3448 goto f_err;
3449 }
3450 } else
d02b48c6 3451#endif
bc36ee62 3452#ifndef OPENSSL_NO_DH
0f113f3e
MC		 3453 if (alg_k & (SSL_kDHE | SSL_kDHr | SSL_kDHd)) {
3454 if (dh == NULL
3455 || DH_size(dh) * 8 >
3456 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
3457 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3458 SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3459 goto f_err;
3460 }
3461 } else
3462#endif
3463 {
3464 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3465 SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3466 goto f_err;
3467 }
3468 }
3469 return (1);
3470 f_err:
3471 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
3472 err:
3473 return (0);
3474}
3475
3476/*
3477 * Check to see if handshake is full or resumed. Usually this is just a case
3478 * of checking to see if a cache hit has occurred. In the case of session
3479 * tickets we have to check the next message to be sure.
6434abbf
DSH		 3480 */
3481
3482#ifndef OPENSSL_NO_TLSEXT
bf48836c 3483# ifndef OPENSSL_NO_NEXTPROTONEG
ee2ffc27 3484int ssl3_send_next_proto(SSL *s)
0f113f3e
MC		 3485{
3486 unsigned int len, padding_len;
3487 unsigned char *d;
3488
3489 if (s->state == SSL3_ST_CW_NEXT_PROTO_A) {
3490 len = s->next_proto_negotiated_len;
3491 padding_len = 32 - ((len + 2) % 32);
3492 d = (unsigned char *)s->init_buf->data;
3493 d[4] = len;
3494 memcpy(d + 5, s->next_proto_negotiated, len);
3495 d[5 + len] = padding_len;
3496 memset(d + 6 + len, 0, padding_len);
3497 *(d++) = SSL3_MT_NEXT_PROTO;
3498 l2n3(2 + len + padding_len, d);
3499 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3500 s->init_num = 4 + 2 + len + padding_len;
3501 s->init_off = 0;
3502 }
3503
3504 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3505}
ee2ffc27 3506# endif
6434abbf 3507#endif
368888bc
DSH		 3508
3509int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
0f113f3e
MC		 3510{
3511 int i = 0;
368888bc 3512#ifndef OPENSSL_NO_ENGINE
0f113f3e
MC		 3513 if (s->ctx->client_cert_engine) {
3514 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3515 SSL_get_client_CA_list(s),
3516 px509, ppkey, NULL, NULL, NULL);
3517 if (i != 0)
3518 return i;
3519 }
3520#endif
3521 if (s->ctx->client_cert_cb)
3522 i = s->ctx->client_cert_cb(s, px509, ppkey);
3523 return i;
3524}
A mirror of the official openssl repository