1 /* ssl/s3_clnt.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58 /* ====================================================================
59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 *
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
71 * distribution.
72 *
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 *
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
82 *
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 * acknowledgment:
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
105 *
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
109 *
110 */
111 /* ====================================================================
112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113 *
114 * Portions of the attached software ("Contribution") are developed by
115 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
116 *
117 * The Contribution is licensed pursuant to the OpenSSL open source
118 * license provided above.
119 *
120 * ECC cipher suite support in OpenSSL originally written by
121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
122 *
123 */
124 /* ====================================================================
125 * Copyright 2005 Nokia. All rights reserved.
126 *
127 * The portions of the attached software ("Contribution") is developed by
128 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
129 * license.
130 *
131 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
132 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
133 * support (see RFC 4279) to OpenSSL.
134 *
135 * No patent licenses or other rights except those expressly stated in
136 * the OpenSSL open source license shall be deemed granted or received
137 * expressly, by implication, estoppel, or otherwise.
138 *
139 * No assurances are provided by Nokia that the Contribution does not
140 * infringe the patent or other intellectual property rights of any third
141 * party or that the license provides you with all the necessary rights
142 * to make use of the Contribution.
143 *
144 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
145 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
146 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
147 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
148 * OTHERWISE.
149 */
150
151 #include <stdio.h>
152 #include "ssl_locl.h"
153 #include "kssl_lcl.h"
154 #include <openssl/buffer.h>
155 #include <openssl/rand.h>
156 #include <openssl/objects.h>
157 #include <openssl/evp.h>
158 #include <openssl/md5.h>
159 #ifdef OPENSSL_FIPS
160 #include <openssl/fips.h>
161 #endif
162 #ifndef OPENSSL_NO_DH
163 #include <openssl/dh.h>
164 #endif
165 #include <openssl/bn.h>
166 #ifndef OPENSSL_NO_ENGINE
167 #include <openssl/engine.h>
168 #endif
169
170 static const SSL_METHOD *ssl3_get_client_method(int ver);
171 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
172
ssl3_get_client_method(int ver)173 static const SSL_METHOD *ssl3_get_client_method(int ver)
174 {
175 if (ver == SSL3_VERSION)
176 return(SSLv3_client_method());
177 else
178 return(NULL);
179 }
180
IMPLEMENT_ssl3_meth_func(SSLv3_client_method,ssl_undefined_function,ssl3_connect,ssl3_get_client_method)181 IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
182 ssl_undefined_function,
183 ssl3_connect,
184 ssl3_get_client_method)
185
186 int ssl3_connect(SSL *s)
187 {
188 BUF_MEM *buf=NULL;
189 unsigned long Time=(unsigned long)time(NULL);
190 void (*cb)(const SSL *ssl,int type,int val)=NULL;
191 int ret= -1;
192 int new_state,state,skip=0;
193
194 RAND_add(&Time,sizeof(Time),0);
195 ERR_clear_error();
196 clear_sys_error();
197
198 if (s->info_callback != NULL)
199 cb=s->info_callback;
200 else if (s->ctx->info_callback != NULL)
201 cb=s->ctx->info_callback;
202
203 s->in_handshake++;
204 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
205
206 #ifndef OPENSSL_NO_HEARTBEATS
207 /* If we're awaiting a HeartbeatResponse, pretend we
208 * already got and don't await it anymore, because
209 * Heartbeats don't make sense during handshakes anyway.
210 */
211 if (s->tlsext_hb_pending)
212 {
213 s->tlsext_hb_pending = 0;
214 s->tlsext_hb_seq++;
215 }
216 #endif
217
218 // BEGIN android-added
219 #if 0
220 /* Send app data in separate packet, otherwise, some particular site
221 * (only one site so far) closes the socket. http://b/2511073
222 * Note: there is a very small chance that two TCP packets
223 * could be arriving at server combined into a single TCP packet,
224 * then trigger that site to break. We haven't encounter that though.
225 */
226 // END android-added
227 if (SSL_get_mode(s) & SSL_MODE_HANDSHAKE_CUTTHROUGH)
228 {
229 /* Send app data along with CCS/Finished */
230 s->s3->flags |= SSL3_FLAGS_DELAY_CLIENT_FINISHED;
231 }
232
233 // BEGIN android-added
234 #endif
235 // END android-added
236 for (;;)
237 {
238 state=s->state;
239
240 switch(s->state)
241 {
242 case SSL_ST_RENEGOTIATE:
243 s->renegotiate=1;
244 s->state=SSL_ST_CONNECT;
245 s->ctx->stats.sess_connect_renegotiate++;
246 /* break */
247 case SSL_ST_BEFORE:
248 case SSL_ST_CONNECT:
249 case SSL_ST_BEFORE|SSL_ST_CONNECT:
250 case SSL_ST_OK|SSL_ST_CONNECT:
251
252 s->server=0;
253 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
254
255 if ((s->version & 0xff00 ) != 0x0300)
256 {
257 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
258 ret = -1;
259 goto end;
260 }
261
262 /* s->version=SSL3_VERSION; */
263 s->type=SSL_ST_CONNECT;
264
265 if (s->init_buf == NULL)
266 {
267 if ((buf=BUF_MEM_new()) == NULL)
268 {
269 ret= -1;
270 goto end;
271 }
272 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
273 {
274 ret= -1;
275 goto end;
276 }
277 s->init_buf=buf;
278 buf=NULL;
279 }
280
281 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
282
283 /* setup buffing BIO */
284 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
285
286 /* don't push the buffering BIO quite yet */
287
288 ssl3_init_finished_mac(s);
289
290 s->state=SSL3_ST_CW_CLNT_HELLO_A;
291 s->ctx->stats.sess_connect++;
292 s->init_num=0;
293 break;
294
295 case SSL3_ST_CW_CLNT_HELLO_A:
296 case SSL3_ST_CW_CLNT_HELLO_B:
297
298 s->shutdown=0;
299 ret=ssl3_client_hello(s);
300 if (ret <= 0) goto end;
301 s->state=SSL3_ST_CR_SRVR_HELLO_A;
302 s->init_num=0;
303
304 /* turn on buffering for the next lot of output */
305 if (s->bbio != s->wbio)
306 s->wbio=BIO_push(s->bbio,s->wbio);
307
308 break;
309
310 case SSL3_ST_CR_SRVR_HELLO_A:
311 case SSL3_ST_CR_SRVR_HELLO_B:
312 ret=ssl3_get_server_hello(s);
313 if (ret <= 0) goto end;
314
315 if (s->hit)
316 {
317 s->state=SSL3_ST_CR_FINISHED_A;
318 #ifndef OPENSSL_NO_TLSEXT
319 if (s->tlsext_ticket_expected)
320 {
321 /* receive renewed session ticket */
322 s->state=SSL3_ST_CR_SESSION_TICKET_A;
323 }
324 #endif
325 }
326 else
327 s->state=SSL3_ST_CR_CERT_A;
328 s->init_num=0;
329 break;
330
331 case SSL3_ST_CR_CERT_A:
332 case SSL3_ST_CR_CERT_B:
333 #ifndef OPENSSL_NO_TLSEXT
334 ret=ssl3_check_finished(s);
335 if (ret <= 0) goto end;
336 if (ret == 2)
337 {
338 s->hit = 1;
339 if (s->tlsext_ticket_expected)
340 s->state=SSL3_ST_CR_SESSION_TICKET_A;
341 else
342 s->state=SSL3_ST_CR_FINISHED_A;
343 s->init_num=0;
344 break;
345 }
346 #endif
347 /* Check if it is anon DH/ECDH */
348 /* or PSK */
349 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
350 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
351 {
352 ret=ssl3_get_server_certificate(s);
353 if (ret <= 0) goto end;
354 #ifndef OPENSSL_NO_TLSEXT
355 if (s->tlsext_status_expected)
356 s->state=SSL3_ST_CR_CERT_STATUS_A;
357 else
358 s->state=SSL3_ST_CR_KEY_EXCH_A;
359 }
360 else
361 {
362 skip = 1;
363 s->state=SSL3_ST_CR_KEY_EXCH_A;
364 }
365 #else
366 }
367 else
368 skip=1;
369
370 s->state=SSL3_ST_CR_KEY_EXCH_A;
371 #endif
372 s->init_num=0;
373 break;
374
375 case SSL3_ST_CR_KEY_EXCH_A:
376 case SSL3_ST_CR_KEY_EXCH_B:
377 ret=ssl3_get_key_exchange(s);
378 if (ret <= 0) goto end;
379 s->state=SSL3_ST_CR_CERT_REQ_A;
380 s->init_num=0;
381
382 /* at this point we check that we have the
383 * required stuff from the server */
384 if (!ssl3_check_cert_and_algorithm(s))
385 {
386 ret= -1;
387 goto end;
388 }
389 break;
390
391 case SSL3_ST_CR_CERT_REQ_A:
392 case SSL3_ST_CR_CERT_REQ_B:
393 ret=ssl3_get_certificate_request(s);
394 if (ret <= 0) goto end;
395 s->state=SSL3_ST_CR_SRVR_DONE_A;
396 s->init_num=0;
397 break;
398
399 case SSL3_ST_CR_SRVR_DONE_A:
400 case SSL3_ST_CR_SRVR_DONE_B:
401 ret=ssl3_get_server_done(s);
402 if (ret <= 0) goto end;
403 #ifndef OPENSSL_NO_SRP
404 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP)
405 {
406 if ((ret = SRP_Calc_A_param(s))<=0)
407 {
408 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
409 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
410 goto end;
411 }
412 }
413 #endif
414 if (s->s3->tmp.cert_req)
415 s->state=SSL3_ST_CW_CERT_A;
416 else
417 s->state=SSL3_ST_CW_KEY_EXCH_A;
418 s->init_num=0;
419
420 break;
421
422 case SSL3_ST_CW_CERT_A:
423 case SSL3_ST_CW_CERT_B:
424 case SSL3_ST_CW_CERT_C:
425 case SSL3_ST_CW_CERT_D:
426 ret=ssl3_send_client_certificate(s);
427 if (ret <= 0) goto end;
428 s->state=SSL3_ST_CW_KEY_EXCH_A;
429 s->init_num=0;
430 break;
431
432 case SSL3_ST_CW_KEY_EXCH_A:
433 case SSL3_ST_CW_KEY_EXCH_B:
434 ret=ssl3_send_client_key_exchange(s);
435 if (ret <= 0) goto end;
436 /* EAY EAY EAY need to check for DH fix cert
437 * sent back */
438 /* For TLS, cert_req is set to 2, so a cert chain
439 * of nothing is sent, but no verify packet is sent */
440 /* XXX: For now, we do not support client
441 * authentication in ECDH cipher suites with
442 * ECDH (rather than ECDSA) certificates.
443 * We need to skip the certificate verify
444 * message when client's ECDH public key is sent
445 * inside the client certificate.
446 */
447 if (s->s3->tmp.cert_req == 1)
448 {
449 s->state=SSL3_ST_CW_CERT_VRFY_A;
450 }
451 else
452 {
453 s->state=SSL3_ST_CW_CHANGE_A;
454 s->s3->change_cipher_spec=0;
455 }
456 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
457 {
458 s->state=SSL3_ST_CW_CHANGE_A;
459 s->s3->change_cipher_spec=0;
460 }
461
462 s->init_num=0;
463 break;
464
465 case SSL3_ST_CW_CERT_VRFY_A:
466 case SSL3_ST_CW_CERT_VRFY_B:
467 ret=ssl3_send_client_verify(s);
468 if (ret <= 0) goto end;
469 s->state=SSL3_ST_CW_CHANGE_A;
470 s->init_num=0;
471 s->s3->change_cipher_spec=0;
472 break;
473
474 case SSL3_ST_CW_CHANGE_A:
475 case SSL3_ST_CW_CHANGE_B:
476 ret=ssl3_send_change_cipher_spec(s,
477 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
478 if (ret <= 0) goto end;
479
480 s->state=SSL3_ST_CW_FINISHED_A;
481 #if !defined(OPENSSL_NO_TLSEXT)
482 if (s->s3->tlsext_channel_id_valid)
483 s->state=SSL3_ST_CW_CHANNEL_ID_A;
484 # if !defined(OPENSSL_NO_NEXTPROTONEG)
485 if (s->s3->next_proto_neg_seen)
486 s->state=SSL3_ST_CW_NEXT_PROTO_A;
487 # endif
488 #endif
489 s->init_num=0;
490
491 s->session->cipher=s->s3->tmp.new_cipher;
492 #ifdef OPENSSL_NO_COMP
493 s->session->compress_meth=0;
494 #else
495 if (s->s3->tmp.new_compression == NULL)
496 s->session->compress_meth=0;
497 else
498 s->session->compress_meth=
499 s->s3->tmp.new_compression->id;
500 #endif
501 if (!s->method->ssl3_enc->setup_key_block(s))
502 {
503 ret= -1;
504 goto end;
505 }
506
507 if (!s->method->ssl3_enc->change_cipher_state(s,
508 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
509 {
510 ret= -1;
511 goto end;
512 }
513
514 break;
515
516 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
517 case SSL3_ST_CW_NEXT_PROTO_A:
518 case SSL3_ST_CW_NEXT_PROTO_B:
519 ret=ssl3_send_next_proto(s);
520 if (ret <= 0) goto end;
521 if (s->s3->tlsext_channel_id_valid)
522 s->state=SSL3_ST_CW_CHANNEL_ID_A;
523 else
524 s->state=SSL3_ST_CW_FINISHED_A;
525 break;
526 #endif
527
528 #if !defined(OPENSSL_NO_TLSEXT)
529 case SSL3_ST_CW_CHANNEL_ID_A:
530 case SSL3_ST_CW_CHANNEL_ID_B:
531 ret=ssl3_send_channel_id(s);
532 if (ret <= 0) goto end;
533 s->state=SSL3_ST_CW_FINISHED_A;
534 break;
535 #endif
536
537 case SSL3_ST_CW_FINISHED_A:
538 case SSL3_ST_CW_FINISHED_B:
539 ret=ssl3_send_finished(s,
540 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
541 s->method->ssl3_enc->client_finished_label,
542 s->method->ssl3_enc->client_finished_label_len);
543 if (ret <= 0) goto end;
544 s->state=SSL3_ST_CW_FLUSH;
545
546 /* clear flags */
547 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
548 if (s->hit)
549 {
550 s->s3->tmp.next_state=SSL_ST_OK;
551 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
552 {
553 s->state=SSL_ST_OK;
554 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
555 s->s3->delay_buf_pop_ret=0;
556 }
557 }
558 else
559 {
560 if ((SSL_get_mode(s) & SSL_MODE_HANDSHAKE_CUTTHROUGH) && SSL_get_cipher_bits(s, NULL) >= 128
561 && s->s3->previous_server_finished_len == 0 /* no cutthrough on renegotiation (would complicate the state machine) */
562 )
563 {
564 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
565 {
566 s->state=SSL3_ST_CUTTHROUGH_COMPLETE;
567 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
568 s->s3->delay_buf_pop_ret=0;
569 }
570 else
571 {
572 s->s3->tmp.next_state=SSL3_ST_CUTTHROUGH_COMPLETE;
573 }
574 }
575 else
576 {
577 #ifndef OPENSSL_NO_TLSEXT
578 /* Allow NewSessionTicket if ticket expected */
579 if (s->tlsext_ticket_expected)
580 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
581 else
582 #endif
583 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
584 }
585 }
586 s->init_num=0;
587 break;
588
589 #ifndef OPENSSL_NO_TLSEXT
590 case SSL3_ST_CR_SESSION_TICKET_A:
591 case SSL3_ST_CR_SESSION_TICKET_B:
592 ret=ssl3_get_new_session_ticket(s);
593 if (ret <= 0) goto end;
594 s->state=SSL3_ST_CR_FINISHED_A;
595 s->init_num=0;
596 break;
597
598 case SSL3_ST_CR_CERT_STATUS_A:
599 case SSL3_ST_CR_CERT_STATUS_B:
600 ret=ssl3_get_cert_status(s);
601 if (ret <= 0) goto end;
602 s->state=SSL3_ST_CR_KEY_EXCH_A;
603 s->init_num=0;
604 break;
605 #endif
606
607 case SSL3_ST_CR_FINISHED_A:
608 case SSL3_ST_CR_FINISHED_B:
609
610 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
611 SSL3_ST_CR_FINISHED_B);
612 if (ret <= 0) goto end;
613
614 if (s->hit)
615 s->state=SSL3_ST_CW_CHANGE_A;
616 else
617 s->state=SSL_ST_OK;
618 s->init_num=0;
619 break;
620
621 case SSL3_ST_CW_FLUSH:
622 s->rwstate=SSL_WRITING;
623 if (BIO_flush(s->wbio) <= 0)
624 {
625 ret= -1;
626 goto end;
627 }
628 s->rwstate=SSL_NOTHING;
629 s->state=s->s3->tmp.next_state;
630 break;
631
632 case SSL3_ST_CUTTHROUGH_COMPLETE:
633 #ifndef OPENSSL_NO_TLSEXT
634 /* Allow NewSessionTicket if ticket expected */
635 if (s->tlsext_ticket_expected)
636 s->state=SSL3_ST_CR_SESSION_TICKET_A;
637 else
638 #endif
639 s->state=SSL3_ST_CR_FINISHED_A;
640
641 /* SSL_write() will take care of flushing buffered data if
642 * DELAY_CLIENT_FINISHED is set.
643 */
644 if (!(s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED))
645 ssl_free_wbio_buffer(s);
646 ret = 1;
647 goto end;
648 /* break; */
649
650 case SSL_ST_OK:
651 /* clean a few things up */
652 ssl3_cleanup_key_block(s);
653
654 if (s->init_buf != NULL)
655 {
656 BUF_MEM_free(s->init_buf);
657 s->init_buf=NULL;
658 }
659
660 /* If we are not 'joining' the last two packets,
661 * remove the buffering now */
662 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
663 ssl_free_wbio_buffer(s);
664 /* else do it later in ssl3_write */
665
666 s->init_num=0;
667 s->renegotiate=0;
668 s->new_session=0;
669
670 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
671 if (s->hit) s->ctx->stats.sess_hit++;
672
673 ret=1;
674 /* s->server=0; */
675 s->handshake_func=ssl3_connect;
676 s->ctx->stats.sess_connect_good++;
677
678 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
679
680 goto end;
681 /* break; */
682
683 default:
684 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
685 ret= -1;
686 goto end;
687 /* break; */
688 }
689
690 /* did we do anything */
691 if (!s->s3->tmp.reuse_message && !skip)
692 {
693 if (s->debug)
694 {
695 if ((ret=BIO_flush(s->wbio)) <= 0)
696 goto end;
697 }
698
699 if ((cb != NULL) && (s->state != state))
700 {
701 new_state=s->state;
702 s->state=state;
703 cb(s,SSL_CB_CONNECT_LOOP,1);
704 s->state=new_state;
705 }
706 }
707 skip=0;
708 }
709 end:
710 s->in_handshake--;
711 if (buf != NULL)
712 BUF_MEM_free(buf);
713 if (cb != NULL)
714 cb(s,SSL_CB_CONNECT_EXIT,ret);
715 return(ret);
716 }
717
718
ssl3_client_hello(SSL * s)719 int ssl3_client_hello(SSL *s)
720 {
721 unsigned char *buf;
722 unsigned char *p,*d;
723 int i;
724 unsigned long Time,l;
725 #ifndef OPENSSL_NO_COMP
726 int j;
727 SSL_COMP *comp;
728 #endif
729
730 buf=(unsigned char *)s->init_buf->data;
731 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
732 {
733 SSL_SESSION *sess = s->session;
734 if ((sess == NULL) ||
735 (sess->ssl_version != s->version) ||
736 #ifdef OPENSSL_NO_TLSEXT
737 !sess->session_id_length ||
738 #else
739 (!sess->session_id_length && !sess->tlsext_tick) ||
740 #endif
741 (sess->not_resumable))
742 {
743 if (!s->session_creation_enabled)
744 {
745 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
746 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_SESSION_MAY_NOT_BE_CREATED);
747 goto err;
748 }
749 if (!ssl_get_new_session(s,0))
750 goto err;
751 }
752 /* else use the pre-loaded session */
753
754 p=s->s3->client_random;
755 Time=(unsigned long)time(NULL); /* Time */
756 l2n(Time,p);
757 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
758 goto err;
759
760 /* Do the message type and length last */
761 d=p= &(buf[4]);
762
763 /* version indicates the negotiated version: for example from
764 * an SSLv2/v3 compatible client hello). The client_version
765 * field is the maximum version we permit and it is also
766 * used in RSA encrypted premaster secrets. Some servers can
767 * choke if we initially report a higher version then
768 * renegotiate to a lower one in the premaster secret. This
769 * didn't happen with TLS 1.0 as most servers supported it
770 * but it can with TLS 1.1 or later if the server only supports
771 * 1.0.
772 *
773 * Possible scenario with previous logic:
774 * 1. Client hello indicates TLS 1.2
775 * 2. Server hello says TLS 1.0
776 * 3. RSA encrypted premaster secret uses 1.2.
777 * 4. Handhaked proceeds using TLS 1.0.
778 * 5. Server sends hello request to renegotiate.
779 * 6. Client hello indicates TLS v1.0 as we now
780 * know that is maximum server supports.
781 * 7. Server chokes on RSA encrypted premaster secret
782 * containing version 1.0.
783 *
784 * For interoperability it should be OK to always use the
785 * maximum version we support in client hello and then rely
786 * on the checking of version to ensure the servers isn't
787 * being inconsistent: for example initially negotiating with
788 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
789 * client_version in client hello and not resetting it to
790 * the negotiated version.
791 */
792 #if 0
793 *(p++)=s->version>>8;
794 *(p++)=s->version&0xff;
795 s->client_version=s->version;
796 #else
797 *(p++)=s->client_version>>8;
798 *(p++)=s->client_version&0xff;
799 #endif
800
801 /* Random stuff */
802 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
803 p+=SSL3_RANDOM_SIZE;
804
805 /* Session ID */
806 if (s->new_session)
807 i=0;
808 else
809 i=s->session->session_id_length;
810 *(p++)=i;
811 if (i != 0)
812 {
813 if (i > (int)sizeof(s->session->session_id))
814 {
815 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
816 goto err;
817 }
818 memcpy(p,s->session->session_id,i);
819 p+=i;
820 }
821
822 /* Ciphers supported */
823 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
824 if (i == 0)
825 {
826 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
827 goto err;
828 }
829 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
830 /* Some servers hang if client hello > 256 bytes
831 * as hack workaround chop number of supported ciphers
832 * to keep it well below this if we use TLS v1.2
833 */
834 if (TLS1_get_version(s) >= TLS1_2_VERSION
835 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
836 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
837 #endif
838 s2n(i,p);
839 p+=i;
840
841 /* COMPRESSION */
842 #ifdef OPENSSL_NO_COMP
843 *(p++)=1;
844 #else
845
846 if ((s->options & SSL_OP_NO_COMPRESSION)
847 || !s->ctx->comp_methods)
848 j=0;
849 else
850 j=sk_SSL_COMP_num(s->ctx->comp_methods);
851 *(p++)=1+j;
852 for (i=0; i<j; i++)
853 {
854 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
855 *(p++)=comp->id;
856 }
857 #endif
858 *(p++)=0; /* Add the NULL method */
859
860 #ifndef OPENSSL_NO_TLSEXT
861 /* TLS extensions*/
862 if (ssl_prepare_clienthello_tlsext(s) <= 0)
863 {
864 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
865 goto err;
866 }
867 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
868 {
869 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
870 goto err;
871 }
872 #endif
873
874 l=(p-d);
875 d=buf;
876 *(d++)=SSL3_MT_CLIENT_HELLO;
877 l2n3(l,d);
878
879 s->state=SSL3_ST_CW_CLNT_HELLO_B;
880 /* number of bytes to write */
881 s->init_num=p-buf;
882 s->init_off=0;
883 }
884
885 /* SSL3_ST_CW_CLNT_HELLO_B */
886 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
887 err:
888 return(-1);
889 }
890
ssl3_get_server_hello(SSL * s)891 int ssl3_get_server_hello(SSL *s)
892 {
893 STACK_OF(SSL_CIPHER) *sk;
894 const SSL_CIPHER *c;
895 unsigned char *p,*d;
896 int i,al,ok;
897 unsigned int j;
898 long n;
899 #ifndef OPENSSL_NO_COMP
900 SSL_COMP *comp;
901 #endif
902
903 n=s->method->ssl_get_message(s,
904 SSL3_ST_CR_SRVR_HELLO_A,
905 SSL3_ST_CR_SRVR_HELLO_B,
906 -1,
907 20000, /* ?? */
908 &ok);
909
910 if (!ok) return((int)n);
911
912 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
913 {
914 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
915 {
916 if ( s->d1->send_cookie == 0)
917 {
918 s->s3->tmp.reuse_message = 1;
919 return 1;
920 }
921 else /* already sent a cookie */
922 {
923 al=SSL_AD_UNEXPECTED_MESSAGE;
924 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
925 goto f_err;
926 }
927 }
928 }
929
930 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
931 {
932 al=SSL_AD_UNEXPECTED_MESSAGE;
933 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
934 goto f_err;
935 }
936
937 d=p=(unsigned char *)s->init_msg;
938
939 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
940 {
941 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
942 s->version=(s->version&0xff00)|p[1];
943 al=SSL_AD_PROTOCOL_VERSION;
944 goto f_err;
945 }
946 p+=2;
947
948 /* load the server hello data */
949 /* load the server random */
950 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
951 p+=SSL3_RANDOM_SIZE;
952
953 /* get the session-id */
954 j= *(p++);
955
956 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
957 {
958 al=SSL_AD_ILLEGAL_PARAMETER;
959 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
960 goto f_err;
961 }
962
963 #ifndef OPENSSL_NO_TLSEXT
964 /* check if we want to resume the session based on external pre-shared secret */
965 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
966 {
967 SSL_CIPHER *pref_cipher=NULL;
968 s->session->master_key_length=sizeof(s->session->master_key);
969 if (s->tls_session_secret_cb(s, s->session->master_key,
970 &s->session->master_key_length,
971 NULL, &pref_cipher,
972 s->tls_session_secret_cb_arg))
973 {
974 s->session->cipher = pref_cipher ?
975 pref_cipher : ssl_get_cipher_by_char(s, p+j);
976 }
977 }
978 #endif /* OPENSSL_NO_TLSEXT */
979
980 if (j != 0 && j == s->session->session_id_length
981 && memcmp(p,s->session->session_id,j) == 0)
982 {
983 if(s->sid_ctx_length != s->session->sid_ctx_length
984 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
985 {
986 /* actually a client application bug */
987 al=SSL_AD_ILLEGAL_PARAMETER;
988 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
989 goto f_err;
990 }
991 s->hit=1;
992 }
993 else /* a miss or crap from the other end */
994 {
995 /* If we were trying for session-id reuse, make a new
996 * SSL_SESSION so we don't stuff up other people */
997 s->hit=0;
998 if (s->session->session_id_length > 0)
999 {
1000 if (!s->session_creation_enabled)
1001 {
1002 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1003 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SESSION_MAY_NOT_BE_CREATED);
1004 goto err;
1005 }
1006 if (!ssl_get_new_session(s,0))
1007 {
1008 al=SSL_AD_INTERNAL_ERROR;
1009 goto f_err;
1010 }
1011 }
1012 s->session->session_id_length=j;
1013 memcpy(s->session->session_id,p,j); /* j could be 0 */
1014 }
1015 p+=j;
1016 c=ssl_get_cipher_by_char(s,p);
1017 if (c == NULL)
1018 {
1019 /* unknown cipher */
1020 al=SSL_AD_ILLEGAL_PARAMETER;
1021 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
1022 goto f_err;
1023 }
1024 /* TLS v1.2 only ciphersuites require v1.2 or later */
1025 if ((c->algorithm_ssl & SSL_TLSV1_2) &&
1026 (TLS1_get_version(s) < TLS1_2_VERSION))
1027 {
1028 al=SSL_AD_ILLEGAL_PARAMETER;
1029 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1030 goto f_err;
1031 }
1032 p+=ssl_put_cipher_by_char(s,NULL,NULL);
1033
1034 sk=ssl_get_ciphers_by_id(s);
1035 i=sk_SSL_CIPHER_find(sk,c);
1036 if (i < 0)
1037 {
1038 /* we did not say we would use this cipher */
1039 al=SSL_AD_ILLEGAL_PARAMETER;
1040 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1041 goto f_err;
1042 }
1043
1044 /* Depending on the session caching (internal/external), the cipher
1045 and/or cipher_id values may not be set. Make sure that
1046 cipher_id is set and use it for comparison. */
1047 if (s->session->cipher)
1048 s->session->cipher_id = s->session->cipher->id;
1049 if (s->hit && (s->session->cipher_id != c->id))
1050 {
1051 /* Workaround is now obsolete */
1052 #if 0
1053 if (!(s->options &
1054 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
1055 #endif
1056 {
1057 al=SSL_AD_ILLEGAL_PARAMETER;
1058 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1059 goto f_err;
1060 }
1061 }
1062 s->s3->tmp.new_cipher=c;
1063 /* Don't digest cached records if TLS v1.2: we may need them for
1064 * client authentication.
1065 */
1066 if (TLS1_get_version(s) < TLS1_2_VERSION && !ssl3_digest_cached_records(s))
1067 {
1068 al = SSL_AD_INTERNAL_ERROR;
1069 goto f_err;
1070 }
1071 /* lets get the compression algorithm */
1072 /* COMPRESSION */
1073 #ifdef OPENSSL_NO_COMP
1074 if (*(p++) != 0)
1075 {
1076 al=SSL_AD_ILLEGAL_PARAMETER;
1077 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1078 goto f_err;
1079 }
1080 /* If compression is disabled we'd better not try to resume a session
1081 * using compression.
1082 */
1083 if (s->session->compress_meth != 0)
1084 {
1085 al=SSL_AD_INTERNAL_ERROR;
1086 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1087 goto f_err;
1088 }
1089 #else
1090 j= *(p++);
1091 if (s->hit && j != s->session->compress_meth)
1092 {
1093 al=SSL_AD_ILLEGAL_PARAMETER;
1094 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1095 goto f_err;
1096 }
1097 if (j == 0)
1098 comp=NULL;
1099 else if (s->options & SSL_OP_NO_COMPRESSION)
1100 {
1101 al=SSL_AD_ILLEGAL_PARAMETER;
1102 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1103 goto f_err;
1104 }
1105 else
1106 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1107
1108 if ((j != 0) && (comp == NULL))
1109 {
1110 al=SSL_AD_ILLEGAL_PARAMETER;
1111 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1112 goto f_err;
1113 }
1114 else
1115 {
1116 s->s3->tmp.new_compression=comp;
1117 }
1118 #endif
1119
1120 #ifndef OPENSSL_NO_TLSEXT
1121 /* TLS extensions*/
1122 if (s->version >= SSL3_VERSION)
1123 {
1124 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al))
1125 {
1126 /* 'al' set by ssl_parse_serverhello_tlsext */
1127 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1128 goto f_err;
1129 }
1130 if (ssl_check_serverhello_tlsext(s) <= 0)
1131 {
1132 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT);
1133 goto err;
1134 }
1135 }
1136 #endif
1137
1138 if (p != (d+n))
1139 {
1140 /* wrong packet length */
1141 al=SSL_AD_DECODE_ERROR;
1142 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1143 goto f_err;
1144 }
1145
1146 return(1);
1147 f_err:
1148 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1149 err:
1150 return(-1);
1151 }
1152
ssl3_get_server_certificate(SSL * s)1153 int ssl3_get_server_certificate(SSL *s)
1154 {
1155 int al,i,ok,ret= -1;
1156 unsigned long n,nc,llen,l;
1157 X509 *x=NULL;
1158 const unsigned char *q,*p;
1159 unsigned char *d;
1160 STACK_OF(X509) *sk=NULL;
1161 SESS_CERT *sc;
1162 EVP_PKEY *pkey=NULL;
1163 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1164
1165 n=s->method->ssl_get_message(s,
1166 SSL3_ST_CR_CERT_A,
1167 SSL3_ST_CR_CERT_B,
1168 -1,
1169 s->max_cert_list,
1170 &ok);
1171
1172 if (!ok) return((int)n);
1173
1174 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1175 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1176 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1177 {
1178 s->s3->tmp.reuse_message=1;
1179 return(1);
1180 }
1181
1182 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1183 {
1184 al=SSL_AD_UNEXPECTED_MESSAGE;
1185 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1186 goto f_err;
1187 }
1188 p=d=(unsigned char *)s->init_msg;
1189
1190 if ((sk=sk_X509_new_null()) == NULL)
1191 {
1192 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1193 goto err;
1194 }
1195
1196 n2l3(p,llen);
1197 if (llen+3 != n)
1198 {
1199 al=SSL_AD_DECODE_ERROR;
1200 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1201 goto f_err;
1202 }
1203 for (nc=0; nc<llen; )
1204 {
1205 n2l3(p,l);
1206 if ((l+nc+3) > llen)
1207 {
1208 al=SSL_AD_DECODE_ERROR;
1209 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1210 goto f_err;
1211 }
1212
1213 q=p;
1214 x=d2i_X509(NULL,&q,l);
1215 if (x == NULL)
1216 {
1217 al=SSL_AD_BAD_CERTIFICATE;
1218 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1219 goto f_err;
1220 }
1221 if (q != (p+l))
1222 {
1223 al=SSL_AD_DECODE_ERROR;
1224 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1225 goto f_err;
1226 }
1227 if (!sk_X509_push(sk,x))
1228 {
1229 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1230 goto err;
1231 }
1232 x=NULL;
1233 nc+=l+3;
1234 p=q;
1235 }
1236
1237 i=ssl_verify_cert_chain(s,sk);
1238 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1239 #ifndef OPENSSL_NO_KRB5
1240 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1241 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1242 #endif /* OPENSSL_NO_KRB5 */
1243 )
1244 {
1245 al=ssl_verify_alarm_type(s->verify_result);
1246 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1247 goto f_err;
1248 }
1249 ERR_clear_error(); /* but we keep s->verify_result */
1250
1251 sc=ssl_sess_cert_new();
1252 if (sc == NULL) goto err;
1253
1254 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1255 s->session->sess_cert=sc;
1256
1257 sc->cert_chain=sk;
1258 /* Inconsistency alert: cert_chain does include the peer's
1259 * certificate, which we don't include in s3_srvr.c */
1260 x=sk_X509_value(sk,0);
1261 sk=NULL;
1262 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1263
1264 pkey=X509_get_pubkey(x);
1265
1266 /* VRS: allow null cert if auth == KRB5 */
1267 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1268 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1269 ? 0 : 1;
1270
1271 #ifdef KSSL_DEBUG
1272 printf("pkey,x = %p, %p\n", pkey,x);
1273 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1274 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1275 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1276 #endif /* KSSL_DEBUG */
1277
1278 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1279 {
1280 x=NULL;
1281 al=SSL3_AL_FATAL;
1282 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1283 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1284 goto f_err;
1285 }
1286
1287 i=ssl_cert_type(x,pkey);
1288 if (need_cert && i < 0)
1289 {
1290 x=NULL;
1291 al=SSL3_AL_FATAL;
1292 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1293 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1294 goto f_err;
1295 }
1296
1297 if (need_cert)
1298 {
1299 sc->peer_cert_type=i;
1300 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1301 /* Why would the following ever happen?
1302 * We just created sc a couple of lines ago. */
1303 if (sc->peer_pkeys[i].x509 != NULL)
1304 X509_free(sc->peer_pkeys[i].x509);
1305 sc->peer_pkeys[i].x509=x;
1306 sc->peer_key= &(sc->peer_pkeys[i]);
1307
1308 if (s->session->peer != NULL)
1309 X509_free(s->session->peer);
1310 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1311 s->session->peer=x;
1312 }
1313 else
1314 {
1315 sc->peer_cert_type=i;
1316 sc->peer_key= NULL;
1317
1318 if (s->session->peer != NULL)
1319 X509_free(s->session->peer);
1320 s->session->peer=NULL;
1321 }
1322 s->session->verify_result = s->verify_result;
1323
1324 x=NULL;
1325 ret=1;
1326
1327 if (0)
1328 {
1329 f_err:
1330 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1331 }
1332 err:
1333 EVP_PKEY_free(pkey);
1334 X509_free(x);
1335 sk_X509_pop_free(sk,X509_free);
1336 return(ret);
1337 }
1338
ssl3_get_key_exchange(SSL * s)1339 int ssl3_get_key_exchange(SSL *s)
1340 {
1341 #ifndef OPENSSL_NO_RSA
1342 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1343 #endif
1344 EVP_MD_CTX md_ctx;
1345 unsigned char *param,*p;
1346 int al,i,j,param_len,ok;
1347 long n,alg_k,alg_a;
1348 EVP_PKEY *pkey=NULL;
1349 const EVP_MD *md = NULL;
1350 #ifndef OPENSSL_NO_RSA
1351 RSA *rsa=NULL;
1352 #endif
1353 #ifndef OPENSSL_NO_DH
1354 DH *dh=NULL;
1355 #endif
1356 #ifndef OPENSSL_NO_ECDH
1357 EC_KEY *ecdh = NULL;
1358 BN_CTX *bn_ctx = NULL;
1359 EC_POINT *srvr_ecpoint = NULL;
1360 int curve_nid = 0;
1361 int encoded_pt_len = 0;
1362 #endif
1363
1364 /* use same message size as in ssl3_get_certificate_request()
1365 * as ServerKeyExchange message may be skipped */
1366 n=s->method->ssl_get_message(s,
1367 SSL3_ST_CR_KEY_EXCH_A,
1368 SSL3_ST_CR_KEY_EXCH_B,
1369 -1,
1370 s->max_cert_list,
1371 &ok);
1372 if (!ok) return((int)n);
1373
1374 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1375 {
1376 #ifndef OPENSSL_NO_PSK
1377 /* In plain PSK ciphersuite, ServerKeyExchange can be
1378 omitted if no identity hint is sent. Set
1379 session->sess_cert anyway to avoid problems
1380 later.*/
1381 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1382 {
1383 s->session->sess_cert=ssl_sess_cert_new();
1384 if (s->ctx->psk_identity_hint)
1385 OPENSSL_free(s->ctx->psk_identity_hint);
1386 s->ctx->psk_identity_hint = NULL;
1387 }
1388 #endif
1389 s->s3->tmp.reuse_message=1;
1390 return(1);
1391 }
1392
1393 param=p=(unsigned char *)s->init_msg;
1394 if (s->session->sess_cert != NULL)
1395 {
1396 #ifndef OPENSSL_NO_RSA
1397 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1398 {
1399 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1400 s->session->sess_cert->peer_rsa_tmp=NULL;
1401 }
1402 #endif
1403 #ifndef OPENSSL_NO_DH
1404 if (s->session->sess_cert->peer_dh_tmp)
1405 {
1406 DH_free(s->session->sess_cert->peer_dh_tmp);
1407 s->session->sess_cert->peer_dh_tmp=NULL;
1408 }
1409 #endif
1410 #ifndef OPENSSL_NO_ECDH
1411 if (s->session->sess_cert->peer_ecdh_tmp)
1412 {
1413 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1414 s->session->sess_cert->peer_ecdh_tmp=NULL;
1415 }
1416 #endif
1417 }
1418 else
1419 {
1420 s->session->sess_cert=ssl_sess_cert_new();
1421 }
1422
1423 param_len=0;
1424 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1425 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1426 EVP_MD_CTX_init(&md_ctx);
1427
1428 #ifndef OPENSSL_NO_PSK
1429 if (alg_k & SSL_kPSK)
1430 {
1431 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1432
1433 al=SSL_AD_HANDSHAKE_FAILURE;
1434 n2s(p,i);
1435 param_len=i+2;
1436 /* Store PSK identity hint for later use, hint is used
1437 * in ssl3_send_client_key_exchange. Assume that the
1438 * maximum length of a PSK identity hint can be as
1439 * long as the maximum length of a PSK identity. */
1440 if (i > PSK_MAX_IDENTITY_LEN)
1441 {
1442 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1443 SSL_R_DATA_LENGTH_TOO_LONG);
1444 goto f_err;
1445 }
1446 if (param_len > n)
1447 {
1448 al=SSL_AD_DECODE_ERROR;
1449 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1450 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1451 goto f_err;
1452 }
1453 /* If received PSK identity hint contains NULL
1454 * characters, the hint is truncated from the first
1455 * NULL. p may not be ending with NULL, so create a
1456 * NULL-terminated string. */
1457 memcpy(tmp_id_hint, p, i);
1458 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1459 if (s->ctx->psk_identity_hint != NULL)
1460 OPENSSL_free(s->ctx->psk_identity_hint);
1461 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1462 if (s->ctx->psk_identity_hint == NULL)
1463 {
1464 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1465 goto f_err;
1466 }
1467
1468 p+=i;
1469 n-=param_len;
1470 }
1471 else
1472 #endif /* !OPENSSL_NO_PSK */
1473 #ifndef OPENSSL_NO_SRP
1474 if (alg_k & SSL_kSRP)
1475 {
1476 n2s(p,i);
1477 param_len=i+2;
1478 if (param_len > n)
1479 {
1480 al=SSL_AD_DECODE_ERROR;
1481 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1482 goto f_err;
1483 }
1484 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1485 {
1486 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1487 goto err;
1488 }
1489 p+=i;
1490
1491 n2s(p,i);
1492 param_len+=i+2;
1493 if (param_len > n)
1494 {
1495 al=SSL_AD_DECODE_ERROR;
1496 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1497 goto f_err;
1498 }
1499 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1500 {
1501 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1502 goto err;
1503 }
1504 p+=i;
1505
1506 i = (unsigned int)(p[0]);
1507 p++;
1508 param_len+=i+1;
1509 if (param_len > n)
1510 {
1511 al=SSL_AD_DECODE_ERROR;
1512 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1513 goto f_err;
1514 }
1515 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1516 {
1517 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1518 goto err;
1519 }
1520 p+=i;
1521
1522 n2s(p,i);
1523 param_len+=i+2;
1524 if (param_len > n)
1525 {
1526 al=SSL_AD_DECODE_ERROR;
1527 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1528 goto f_err;
1529 }
1530 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1531 {
1532 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1533 goto err;
1534 }
1535 p+=i;
1536 n-=param_len;
1537
1538 /* We must check if there is a certificate */
1539 #ifndef OPENSSL_NO_RSA
1540 if (alg_a & SSL_aRSA)
1541 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1542 #else
1543 if (0)
1544 ;
1545 #endif
1546 #ifndef OPENSSL_NO_DSA
1547 else if (alg_a & SSL_aDSS)
1548 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1549 #endif
1550 }
1551 else
1552 #endif /* !OPENSSL_NO_SRP */
1553 #ifndef OPENSSL_NO_RSA
1554 if (alg_k & SSL_kRSA)
1555 {
1556 if ((rsa=RSA_new()) == NULL)
1557 {
1558 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1559 goto err;
1560 }
1561 n2s(p,i);
1562 param_len=i+2;
1563 if (param_len > n)
1564 {
1565 al=SSL_AD_DECODE_ERROR;
1566 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1567 goto f_err;
1568 }
1569 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1570 {
1571 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1572 goto err;
1573 }
1574 p+=i;
1575
1576 n2s(p,i);
1577 param_len+=i+2;
1578 if (param_len > n)
1579 {
1580 al=SSL_AD_DECODE_ERROR;
1581 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1582 goto f_err;
1583 }
1584 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1585 {
1586 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1587 goto err;
1588 }
1589 p+=i;
1590 n-=param_len;
1591
1592 /* this should be because we are using an export cipher */
1593 if (alg_a & SSL_aRSA)
1594 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1595 else
1596 {
1597 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1598 goto err;
1599 }
1600 s->session->sess_cert->peer_rsa_tmp=rsa;
1601 rsa=NULL;
1602 }
1603 #else /* OPENSSL_NO_RSA */
1604 if (0)
1605 ;
1606 #endif
1607 #ifndef OPENSSL_NO_DH
1608 else if (alg_k & SSL_kEDH)
1609 {
1610 if ((dh=DH_new()) == NULL)
1611 {
1612 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1613 goto err;
1614 }
1615 n2s(p,i);
1616 param_len=i+2;
1617 if (param_len > n)
1618 {
1619 al=SSL_AD_DECODE_ERROR;
1620 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1621 goto f_err;
1622 }
1623 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1624 {
1625 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1626 goto err;
1627 }
1628 p+=i;
1629
1630 n2s(p,i);
1631 param_len+=i+2;
1632 if (param_len > n)
1633 {
1634 al=SSL_AD_DECODE_ERROR;
1635 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1636 goto f_err;
1637 }
1638 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1639 {
1640 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1641 goto err;
1642 }
1643 p+=i;
1644
1645 n2s(p,i);
1646 param_len+=i+2;
1647 if (param_len > n)
1648 {
1649 al=SSL_AD_DECODE_ERROR;
1650 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1651 goto f_err;
1652 }
1653 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1654 {
1655 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1656 goto err;
1657 }
1658 p+=i;
1659 n-=param_len;
1660
1661 #ifndef OPENSSL_NO_RSA
1662 if (alg_a & SSL_aRSA)
1663 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1664 #else
1665 if (0)
1666 ;
1667 #endif
1668 #ifndef OPENSSL_NO_DSA
1669 else if (alg_a & SSL_aDSS)
1670 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1671 #endif
1672 /* else anonymous DH, so no certificate or pkey. */
1673
1674 s->session->sess_cert->peer_dh_tmp=dh;
1675 dh=NULL;
1676 }
1677 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1678 {
1679 al=SSL_AD_ILLEGAL_PARAMETER;
1680 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1681 goto f_err;
1682 }
1683 #endif /* !OPENSSL_NO_DH */
1684
1685 #ifndef OPENSSL_NO_ECDH
1686 else if (alg_k & SSL_kEECDH)
1687 {
1688 EC_GROUP *ngroup;
1689 const EC_GROUP *group;
1690
1691 if ((ecdh=EC_KEY_new()) == NULL)
1692 {
1693 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1694 goto err;
1695 }
1696
1697 /* Extract elliptic curve parameters and the
1698 * server's ephemeral ECDH public key.
1699 * Keep accumulating lengths of various components in
1700 * param_len and make sure it never exceeds n.
1701 */
1702
1703 /* XXX: For now we only support named (not generic) curves
1704 * and the ECParameters in this case is just three bytes.
1705 */
1706 param_len=3;
1707 if ((param_len > n) ||
1708 (*p != NAMED_CURVE_TYPE) ||
1709 ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0))
1710 {
1711 al=SSL_AD_INTERNAL_ERROR;
1712 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1713 goto f_err;
1714 }
1715
1716 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1717 if (ngroup == NULL)
1718 {
1719 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1720 goto err;
1721 }
1722 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1723 {
1724 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1725 goto err;
1726 }
1727 EC_GROUP_free(ngroup);
1728
1729 group = EC_KEY_get0_group(ecdh);
1730
1731 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1732 (EC_GROUP_get_degree(group) > 163))
1733 {
1734 al=SSL_AD_EXPORT_RESTRICTION;
1735 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1736 goto f_err;
1737 }
1738
1739 p+=3;
1740
1741 /* Next, get the encoded ECPoint */
1742 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1743 ((bn_ctx = BN_CTX_new()) == NULL))
1744 {
1745 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1746 goto err;
1747 }
1748
1749 encoded_pt_len = *p; /* length of encoded point */
1750 p+=1;
1751 param_len += (1 + encoded_pt_len);
1752 if ((param_len > n) ||
1753 (EC_POINT_oct2point(group, srvr_ecpoint,
1754 p, encoded_pt_len, bn_ctx) == 0))
1755 {
1756 al=SSL_AD_DECODE_ERROR;
1757 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1758 goto f_err;
1759 }
1760
1761 n-=param_len;
1762 p+=encoded_pt_len;
1763
1764 /* The ECC/TLS specification does not mention
1765 * the use of DSA to sign ECParameters in the server
1766 * key exchange message. We do support RSA and ECDSA.
1767 */
1768 if (0) ;
1769 #ifndef OPENSSL_NO_RSA
1770 else if (alg_a & SSL_aRSA)
1771 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1772 #endif
1773 #ifndef OPENSSL_NO_ECDSA
1774 else if (alg_a & SSL_aECDSA)
1775 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1776 #endif
1777 /* else anonymous ECDH, so no certificate or pkey. */
1778 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1779 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1780 ecdh=NULL;
1781 BN_CTX_free(bn_ctx);
1782 bn_ctx = NULL;
1783 EC_POINT_free(srvr_ecpoint);
1784 srvr_ecpoint = NULL;
1785 }
1786 else if (alg_k)
1787 {
1788 al=SSL_AD_UNEXPECTED_MESSAGE;
1789 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1790 goto f_err;
1791 }
1792 #endif /* !OPENSSL_NO_ECDH */
1793
1794
1795 /* p points to the next byte, there are 'n' bytes left */
1796
1797 /* if it was signed, check the signature */
1798 if (pkey != NULL)
1799 {
1800 if (TLS1_get_version(s) >= TLS1_2_VERSION)
1801 {
1802 int sigalg = tls12_get_sigid(pkey);
1803 /* Should never happen */
1804 if (sigalg == -1)
1805 {
1806 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1807 goto err;
1808 }
1809 /* Check key type is consistent with signature */
1810 if (sigalg != (int)p[1])
1811 {
1812 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_TYPE);
1813 al=SSL_AD_DECODE_ERROR;
1814 goto f_err;
1815 }
1816 md = tls12_get_hash(p[0]);
1817 if (md == NULL)
1818 {
1819 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNKNOWN_DIGEST);
1820 al=SSL_AD_DECODE_ERROR;
1821 goto f_err;
1822 }
1823 #ifdef SSL_DEBUG
1824 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1825 #endif
1826 p += 2;
1827 n -= 2;
1828 }
1829 else
1830 md = EVP_sha1();
1831
1832 n2s(p,i);
1833 n-=2;
1834 j=EVP_PKEY_size(pkey);
1835
1836 if ((i != n) || (n > j) || (n <= 0))
1837 {
1838 /* wrong packet length */
1839 al=SSL_AD_DECODE_ERROR;
1840 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1841 goto f_err;
1842 }
1843
1844 #ifndef OPENSSL_NO_RSA
1845 if (pkey->type == EVP_PKEY_RSA && TLS1_get_version(s) < TLS1_2_VERSION)
1846 {
1847 int num;
1848
1849 j=0;
1850 q=md_buf;
1851 for (num=2; num > 0; num--)
1852 {
1853 EVP_MD_CTX_set_flags(&md_ctx,
1854 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1855 EVP_DigestInit_ex(&md_ctx,(num == 2)
1856 ?s->ctx->md5:s->ctx->sha1, NULL);
1857 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1858 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1859 EVP_DigestUpdate(&md_ctx,param,param_len);
1860 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1861 q+=i;
1862 j+=i;
1863 }
1864 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1865 pkey->pkey.rsa);
1866 if (i < 0)
1867 {
1868 al=SSL_AD_DECRYPT_ERROR;
1869 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1870 goto f_err;
1871 }
1872 if (i == 0)
1873 {
1874 /* bad signature */
1875 al=SSL_AD_DECRYPT_ERROR;
1876 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1877 goto f_err;
1878 }
1879 }
1880 else
1881 #endif
1882 {
1883 EVP_VerifyInit_ex(&md_ctx, md, NULL);
1884 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1885 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1886 EVP_VerifyUpdate(&md_ctx,param,param_len);
1887 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1888 {
1889 /* bad signature */
1890 al=SSL_AD_DECRYPT_ERROR;
1891 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1892 goto f_err;
1893 }
1894 }
1895 }
1896 else
1897 {
1898 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
1899 /* aNULL or kPSK do not need public keys */
1900 {
1901 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1902 goto err;
1903 }
1904 /* still data left over */
1905 if (n != 0)
1906 {
1907 al=SSL_AD_DECODE_ERROR;
1908 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1909 goto f_err;
1910 }
1911 }
1912 EVP_PKEY_free(pkey);
1913 EVP_MD_CTX_cleanup(&md_ctx);
1914 return(1);
1915 f_err:
1916 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1917 err:
1918 EVP_PKEY_free(pkey);
1919 #ifndef OPENSSL_NO_RSA
1920 if (rsa != NULL)
1921 RSA_free(rsa);
1922 #endif
1923 #ifndef OPENSSL_NO_DH
1924 if (dh != NULL)
1925 DH_free(dh);
1926 #endif
1927 #ifndef OPENSSL_NO_ECDH
1928 BN_CTX_free(bn_ctx);
1929 EC_POINT_free(srvr_ecpoint);
1930 if (ecdh != NULL)
1931 EC_KEY_free(ecdh);
1932 #endif
1933 EVP_MD_CTX_cleanup(&md_ctx);
1934 return(-1);
1935 }
1936
ssl3_get_certificate_request(SSL * s)1937 int ssl3_get_certificate_request(SSL *s)
1938 {
1939 int ok,ret=0;
1940 unsigned long n,nc,l;
1941 unsigned int llen, ctype_num,i;
1942 X509_NAME *xn=NULL;
1943 const unsigned char *p,*q;
1944 unsigned char *d;
1945 STACK_OF(X509_NAME) *ca_sk=NULL;
1946
1947 n=s->method->ssl_get_message(s,
1948 SSL3_ST_CR_CERT_REQ_A,
1949 SSL3_ST_CR_CERT_REQ_B,
1950 -1,
1951 s->max_cert_list,
1952 &ok);
1953
1954 if (!ok) return((int)n);
1955
1956 s->s3->tmp.cert_req=0;
1957
1958 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1959 {
1960 s->s3->tmp.reuse_message=1;
1961 /* If we get here we don't need any cached handshake records
1962 * as we wont be doing client auth.
1963 */
1964 if (s->s3->handshake_buffer)
1965 {
1966 if (!ssl3_digest_cached_records(s))
1967 goto err;
1968 }
1969 return(1);
1970 }
1971
1972 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1973 {
1974 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1975 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1976 goto err;
1977 }
1978
1979 /* TLS does not like anon-DH with client cert */
1980 if (s->version > SSL3_VERSION)
1981 {
1982 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
1983 {
1984 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1985 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1986 goto err;
1987 }
1988 }
1989
1990 p=d=(unsigned char *)s->init_msg;
1991
1992 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1993 {
1994 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1995 goto err;
1996 }
1997
1998 /* get the certificate types */
1999 ctype_num= *(p++);
2000 if (ctype_num > SSL3_CT_NUMBER)
2001 ctype_num=SSL3_CT_NUMBER;
2002 for (i=0; i<ctype_num; i++)
2003 s->s3->tmp.ctype[i]= p[i];
2004 p+=ctype_num;
2005 if (TLS1_get_version(s) >= TLS1_2_VERSION)
2006 {
2007 n2s(p, llen);
2008 /* Check we have enough room for signature algorithms and
2009 * following length value.
2010 */
2011 if ((unsigned long)(p - d + llen + 2) > n)
2012 {
2013 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2014 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
2015 goto err;
2016 }
2017 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen))
2018 {
2019 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2020 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2021 goto err;
2022 }
2023 p += llen;
2024 }
2025
2026 /* get the CA RDNs */
2027 n2s(p,llen);
2028 #if 0
2029 {
2030 FILE *out;
2031 out=fopen("/tmp/vsign.der","w");
2032 fwrite(p,1,llen,out);
2033 fclose(out);
2034 }
2035 #endif
2036
2037 if ((unsigned long)(p - d + llen) != n)
2038 {
2039 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2040 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
2041 goto err;
2042 }
2043
2044 for (nc=0; nc<llen; )
2045 {
2046 n2s(p,l);
2047 if ((l+nc+2) > llen)
2048 {
2049 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
2050 goto cont; /* netscape bugs */
2051 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2052 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
2053 goto err;
2054 }
2055
2056 q=p;
2057
2058 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
2059 {
2060 /* If netscape tolerance is on, ignore errors */
2061 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
2062 goto cont;
2063 else
2064 {
2065 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2066 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
2067 goto err;
2068 }
2069 }
2070
2071 if (q != (p+l))
2072 {
2073 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2074 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
2075 goto err;
2076 }
2077 if (!sk_X509_NAME_push(ca_sk,xn))
2078 {
2079 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2080 goto err;
2081 }
2082
2083 p+=l;
2084 nc+=l+2;
2085 }
2086
2087 if (0)
2088 {
2089 cont:
2090 ERR_clear_error();
2091 }
2092
2093 /* we should setup a certificate to return.... */
2094 s->s3->tmp.cert_req=1;
2095 s->s3->tmp.ctype_num=ctype_num;
2096 if (s->s3->tmp.ca_names != NULL)
2097 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2098 s->s3->tmp.ca_names=ca_sk;
2099 ca_sk=NULL;
2100
2101 ret=1;
2102 err:
2103 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2104 return(ret);
2105 }
2106
ca_dn_cmp(const X509_NAME * const * a,const X509_NAME * const * b)2107 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2108 {
2109 return(X509_NAME_cmp(*a,*b));
2110 }
2111 #ifndef OPENSSL_NO_TLSEXT
ssl3_get_new_session_ticket(SSL * s)2112 int ssl3_get_new_session_ticket(SSL *s)
2113 {
2114 int ok,al,ret=0, ticklen;
2115 long n;
2116 const unsigned char *p;
2117 unsigned char *d;
2118
2119 n=s->method->ssl_get_message(s,
2120 SSL3_ST_CR_SESSION_TICKET_A,
2121 SSL3_ST_CR_SESSION_TICKET_B,
2122 -1,
2123 16384,
2124 &ok);
2125
2126 if (!ok)
2127 return((int)n);
2128
2129 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
2130 {
2131 s->s3->tmp.reuse_message=1;
2132 return(1);
2133 }
2134 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
2135 {
2136 al=SSL_AD_UNEXPECTED_MESSAGE;
2137 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2138 goto f_err;
2139 }
2140 if (n < 6)
2141 {
2142 /* need at least ticket_lifetime_hint + ticket length */
2143 al = SSL_AD_DECODE_ERROR;
2144 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2145 goto f_err;
2146 }
2147
2148 p=d=(unsigned char *)s->init_msg;
2149 n2l(p, s->session->tlsext_tick_lifetime_hint);
2150 n2s(p, ticklen);
2151 /* ticket_lifetime_hint + ticket_length + ticket */
2152 if (ticklen + 6 != n)
2153 {
2154 al = SSL_AD_DECODE_ERROR;
2155 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2156 goto f_err;
2157 }
2158 if (s->session->tlsext_tick)
2159 {
2160 OPENSSL_free(s->session->tlsext_tick);
2161 s->session->tlsext_ticklen = 0;
2162 }
2163 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2164 if (!s->session->tlsext_tick)
2165 {
2166 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2167 goto err;
2168 }
2169 memcpy(s->session->tlsext_tick, p, ticklen);
2170 s->session->tlsext_ticklen = ticklen;
2171 /* There are two ways to detect a resumed ticket sesion.
2172 * One is to set an appropriate session ID and then the server
2173 * must return a match in ServerHello. This allows the normal
2174 * client session ID matching to work and we know much
2175 * earlier that the ticket has been accepted.
2176 *
2177 * The other way is to set zero length session ID when the
2178 * ticket is presented and rely on the handshake to determine
2179 * session resumption.
2180 *
2181 * We choose the former approach because this fits in with
2182 * assumptions elsewhere in OpenSSL. The session ID is set
2183 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2184 * ticket.
2185 */
2186 EVP_Digest(p, ticklen,
2187 s->session->session_id, &s->session->session_id_length,
2188 #ifndef OPENSSL_NO_SHA256
2189 EVP_sha256(), NULL);
2190 #else
2191 EVP_sha1(), NULL);
2192 #endif
2193 ret=1;
2194 return(ret);
2195 f_err:
2196 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2197 err:
2198 return(-1);
2199 }
2200
ssl3_get_cert_status(SSL * s)2201 int ssl3_get_cert_status(SSL *s)
2202 {
2203 int ok, al;
2204 unsigned long resplen,n;
2205 const unsigned char *p;
2206
2207 n=s->method->ssl_get_message(s,
2208 SSL3_ST_CR_CERT_STATUS_A,
2209 SSL3_ST_CR_CERT_STATUS_B,
2210 SSL3_MT_CERTIFICATE_STATUS,
2211 16384,
2212 &ok);
2213
2214 if (!ok) return((int)n);
2215 if (n < 4)
2216 {
2217 /* need at least status type + length */
2218 al = SSL_AD_DECODE_ERROR;
2219 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2220 goto f_err;
2221 }
2222 p = (unsigned char *)s->init_msg;
2223 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2224 {
2225 al = SSL_AD_DECODE_ERROR;
2226 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2227 goto f_err;
2228 }
2229 n2l3(p, resplen);
2230 if (resplen + 4 != n)
2231 {
2232 al = SSL_AD_DECODE_ERROR;
2233 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2234 goto f_err;
2235 }
2236 if (s->tlsext_ocsp_resp)
2237 OPENSSL_free(s->tlsext_ocsp_resp);
2238 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2239 if (!s->tlsext_ocsp_resp)
2240 {
2241 al = SSL_AD_INTERNAL_ERROR;
2242 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2243 goto f_err;
2244 }
2245 s->tlsext_ocsp_resplen = resplen;
2246 if (s->ctx->tlsext_status_cb)
2247 {
2248 int ret;
2249 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2250 if (ret == 0)
2251 {
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 {
2258 al = SSL_AD_INTERNAL_ERROR;
2259 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2260 goto f_err;
2261 }
2262 }
2263 return 1;
2264 f_err:
2265 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2266 return(-1);
2267 }
2268 #endif
2269
ssl3_get_server_done(SSL * s)2270 int ssl3_get_server_done(SSL *s)
2271 {
2272 int ok,ret=0;
2273 long n;
2274
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,
2279 30, /* should be very small, like 0 :-) */
2280 &ok);
2281
2282 if (!ok) return((int)n);
2283 if (n > 0)
2284 {
2285 /* should contain no data */
2286 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2287 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2288 return -1;
2289 }
2290 ret=1;
2291 return(ret);
2292 }
2293
2294
ssl3_send_client_key_exchange(SSL * s)2295 int ssl3_send_client_key_exchange(SSL *s)
2296 {
2297 unsigned char *p,*d;
2298 int n;
2299 unsigned long alg_k;
2300 #ifndef OPENSSL_NO_RSA
2301 unsigned char *q;
2302 EVP_PKEY *pkey=NULL;
2303 #endif
2304 #ifndef OPENSSL_NO_KRB5
2305 KSSL_ERR kssl_err;
2306 #endif /* OPENSSL_NO_KRB5 */
2307 #ifndef OPENSSL_NO_ECDH
2308 EC_KEY *clnt_ecdh = NULL;
2309 const EC_POINT *srvr_ecpoint = NULL;
2310 EVP_PKEY *srvr_pub_pkey = NULL;
2311 unsigned char *encodedPoint = NULL;
2312 int encoded_pt_len = 0;
2313 BN_CTX * bn_ctx = NULL;
2314 #endif
2315
2316 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2317 {
2318 d=(unsigned char *)s->init_buf->data;
2319 p= &(d[4]);
2320
2321 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2322
2323 /* Fool emacs indentation */
2324 if (0) {}
2325 #ifndef OPENSSL_NO_RSA
2326 else if (alg_k & SSL_kRSA)
2327 {
2328 RSA *rsa;
2329 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2330
2331 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2332 rsa=s->session->sess_cert->peer_rsa_tmp;
2333 else
2334 {
2335 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2336 if ((pkey == NULL) ||
2337 (pkey->type != EVP_PKEY_RSA) ||
2338 (pkey->pkey.rsa == NULL))
2339 {
2340 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2341 goto err;
2342 }
2343 rsa=pkey->pkey.rsa;
2344 EVP_PKEY_free(pkey);
2345 }
2346
2347 tmp_buf[0]=s->client_version>>8;
2348 tmp_buf[1]=s->client_version&0xff;
2349 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2350 goto err;
2351
2352 s->session->master_key_length=sizeof tmp_buf;
2353
2354 q=p;
2355 /* Fix buf for TLS and beyond */
2356 if (s->version > SSL3_VERSION)
2357 p+=2;
2358 n=RSA_public_encrypt(sizeof tmp_buf,
2359 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2360 #ifdef PKCS1_CHECK
2361 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2362 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2363 #endif
2364 if (n <= 0)
2365 {
2366 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2367 goto err;
2368 }
2369
2370 /* Fix buf for TLS and beyond */
2371 if (s->version > SSL3_VERSION)
2372 {
2373 s2n(n,q);
2374 n+=2;
2375 }
2376
2377 s->session->master_key_length=
2378 s->method->ssl3_enc->generate_master_secret(s,
2379 s->session->master_key,
2380 tmp_buf,sizeof tmp_buf);
2381 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2382 }
2383 #endif
2384 #ifndef OPENSSL_NO_KRB5
2385 else if (alg_k & SSL_kKRB5)
2386 {
2387 krb5_error_code krb5rc;
2388 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2389 /* krb5_data krb5_ap_req; */
2390 krb5_data *enc_ticket;
2391 krb5_data authenticator, *authp = NULL;
2392 EVP_CIPHER_CTX ciph_ctx;
2393 const EVP_CIPHER *enc = NULL;
2394 unsigned char iv[EVP_MAX_IV_LENGTH];
2395 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2396 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2397 + EVP_MAX_IV_LENGTH];
2398 int padl, outl = sizeof(epms);
2399
2400 EVP_CIPHER_CTX_init(&ciph_ctx);
2401
2402 #ifdef KSSL_DEBUG
2403 printf("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) authp = &authenticator;
2410 #endif /* KRB5SENDAUTH */
2411
2412 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2413 &kssl_err);
2414 enc = kssl_map_enc(kssl_ctx->enctype);
2415 if (enc == NULL)
2416 goto err;
2417 #ifdef KSSL_DEBUG
2418 {
2419 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2420 if (krb5rc && kssl_err.text)
2421 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2422 }
2423 #endif /* KSSL_DEBUG */
2424
2425 if (krb5rc)
2426 {
2427 ssl3_send_alert(s,SSL3_AL_FATAL,
2428 SSL_AD_HANDSHAKE_FAILURE);
2429 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2430 kssl_err.reason);
2431 goto err;
2432 }
2433
2434 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2435 ** in place of RFC 2712 KerberosWrapper, as in:
2436 **
2437 ** Send ticket (copy to *p, set n = length)
2438 ** n = krb5_ap_req.length;
2439 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2440 ** if (krb5_ap_req.data)
2441 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2442 **
2443 ** Now using real RFC 2712 KerberosWrapper
2444 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2445 ** Note: 2712 "opaque" types are here replaced
2446 ** with a 2-byte length followed by the value.
2447 ** Example:
2448 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2449 ** Where "xx xx" = length bytes. Shown here with
2450 ** optional authenticator omitted.
2451 */
2452
2453 /* KerberosWrapper.Ticket */
2454 s2n(enc_ticket->length,p);
2455 memcpy(p, enc_ticket->data, enc_ticket->length);
2456 p+= enc_ticket->length;
2457 n = enc_ticket->length + 2;
2458
2459 /* KerberosWrapper.Authenticator */
2460 if (authp && authp->length)
2461 {
2462 s2n(authp->length,p);
2463 memcpy(p, authp->data, authp->length);
2464 p+= authp->length;
2465 n+= authp->length + 2;
2466
2467 free(authp->data);
2468 authp->data = NULL;
2469 authp->length = 0;
2470 }
2471 else
2472 {
2473 s2n(0,p);/* null authenticator length */
2474 n+=2;
2475 }
2476
2477 tmp_buf[0]=s->client_version>>8;
2478 tmp_buf[1]=s->client_version&0xff;
2479 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2480 goto err;
2481
2482 /* 20010420 VRS. Tried it this way; failed.
2483 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2484 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2485 ** kssl_ctx->length);
2486 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2487 */
2488
2489 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2490 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2491 kssl_ctx->key,iv);
2492 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2493 sizeof tmp_buf);
2494 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2495 outl += padl;
2496 if (outl > (int)sizeof epms)
2497 {
2498 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 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;
2508
2509 s->session->master_key_length=
2510 s->method->ssl3_enc->generate_master_secret(s,
2511 s->session->master_key,
2512 tmp_buf, sizeof tmp_buf);
2513
2514 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2515 OPENSSL_cleanse(epms, outl);
2516 }
2517 #endif
2518 #ifndef OPENSSL_NO_DH
2519 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2520 {
2521 DH *dh_srvr,*dh_clnt;
2522
2523 if (s->session->sess_cert == NULL)
2524 {
2525 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2526 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2527 goto err;
2528 }
2529
2530 if (s->session->sess_cert->peer_dh_tmp != NULL)
2531 dh_srvr=s->session->sess_cert->peer_dh_tmp;
2532 else
2533 {
2534 /* we get them from the cert */
2535 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2536 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
2537 goto err;
2538 }
2539
2540 /* generate a new random key */
2541 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2542 {
2543 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2544 goto err;
2545 }
2546 if (!DH_generate_key(dh_clnt))
2547 {
2548 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2549 DH_free(dh_clnt);
2550 goto err;
2551 }
2552
2553 /* use the 'p' output buffer for the DH key, but
2554 * make sure to clear it out afterwards */
2555
2556 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2557
2558 if (n <= 0)
2559 {
2560 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2561 DH_free(dh_clnt);
2562 goto err;
2563 }
2564
2565 /* generate master key from the result */
2566 s->session->master_key_length=
2567 s->method->ssl3_enc->generate_master_secret(s,
2568 s->session->master_key,p,n);
2569 /* clean up */
2570 memset(p,0,n);
2571
2572 /* send off the data */
2573 n=BN_num_bytes(dh_clnt->pub_key);
2574 s2n(n,p);
2575 BN_bn2bin(dh_clnt->pub_key,p);
2576 n+=2;
2577
2578 DH_free(dh_clnt);
2579
2580 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2581 }
2582 #endif
2583
2584 #ifndef OPENSSL_NO_ECDH
2585 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
2586 {
2587 const EC_GROUP *srvr_group = NULL;
2588 EC_KEY *tkey;
2589 int ecdh_clnt_cert = 0;
2590 int field_size = 0;
2591
2592 /* Did we send out the client's
2593 * ECDH share for use in premaster
2594 * computation as part of client certificate?
2595 * If so, set ecdh_clnt_cert to 1.
2596 */
2597 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2598 {
2599 /* XXX: For now, we do not support client
2600 * authentication using ECDH certificates.
2601 * To add such support, one needs to add
2602 * code that checks for appropriate
2603 * conditions and sets ecdh_clnt_cert to 1.
2604 * For example, the cert have an ECC
2605 * key on the same curve as the server's
2606 * and the key should be authorized for
2607 * key agreement.
2608 *
2609 * One also needs to add code in ssl3_connect
2610 * to skip sending the certificate verify
2611 * message.
2612 *
2613 * if ((s->cert->key->privatekey != NULL) &&
2614 * (s->cert->key->privatekey->type ==
2615 * EVP_PKEY_EC) && ...)
2616 * ecdh_clnt_cert = 1;
2617 */
2618 }
2619
2620 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2621 {
2622 tkey = s->session->sess_cert->peer_ecdh_tmp;
2623 }
2624 else
2625 {
2626 /* Get the Server Public Key from Cert */
2627 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2628 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2629 if ((srvr_pub_pkey == NULL) ||
2630 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2631 (srvr_pub_pkey->pkey.ec == NULL))
2632 {
2633 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2634 ERR_R_INTERNAL_ERROR);
2635 goto err;
2636 }
2637
2638 tkey = srvr_pub_pkey->pkey.ec;
2639 }
2640
2641 srvr_group = EC_KEY_get0_group(tkey);
2642 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2643
2644 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2645 {
2646 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2647 ERR_R_INTERNAL_ERROR);
2648 goto err;
2649 }
2650
2651 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2652 {
2653 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2654 goto err;
2655 }
2656
2657 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2658 {
2659 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2660 goto err;
2661 }
2662 if (ecdh_clnt_cert)
2663 {
2664 /* Reuse key info from our certificate
2665 * We only need our private key to perform
2666 * the ECDH computation.
2667 */
2668 const BIGNUM *priv_key;
2669 tkey = s->cert->key->privatekey->pkey.ec;
2670 priv_key = EC_KEY_get0_private_key(tkey);
2671 if (priv_key == NULL)
2672 {
2673 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2674 goto err;
2675 }
2676 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2677 {
2678 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2679 goto err;
2680 }
2681 }
2682 else
2683 {
2684 /* Generate a new ECDH key pair */
2685 if (!(EC_KEY_generate_key(clnt_ecdh)))
2686 {
2687 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2688 goto err;
2689 }
2690 }
2691
2692 /* use the 'p' output buffer for the ECDH key, but
2693 * make sure to clear it out afterwards
2694 */
2695
2696 field_size = EC_GROUP_get_degree(srvr_group);
2697 if (field_size <= 0)
2698 {
2699 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2700 ERR_R_ECDH_LIB);
2701 goto err;
2702 }
2703 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2704 if (n <= 0)
2705 {
2706 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2707 ERR_R_ECDH_LIB);
2708 goto err;
2709 }
2710
2711 /* generate master key from the result */
2712 s->session->master_key_length = s->method->ssl3_enc \
2713 -> generate_master_secret(s,
2714 s->session->master_key,
2715 p, n);
2716
2717 memset(p, 0, n); /* clean up */
2718
2719 if (ecdh_clnt_cert)
2720 {
2721 /* Send empty client key exch message */
2722 n = 0;
2723 }
2724 else
2725 {
2726 /* First check the size of encoding and
2727 * allocate memory accordingly.
2728 */
2729 encoded_pt_len =
2730 EC_POINT_point2oct(srvr_group,
2731 EC_KEY_get0_public_key(clnt_ecdh),
2732 POINT_CONVERSION_UNCOMPRESSED,
2733 NULL, 0, NULL);
2734
2735 encodedPoint = (unsigned char *)
2736 OPENSSL_malloc(encoded_pt_len *
2737 sizeof(unsigned char));
2738 bn_ctx = BN_CTX_new();
2739 if ((encodedPoint == NULL) ||
2740 (bn_ctx == NULL))
2741 {
2742 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2743 goto err;
2744 }
2745
2746 /* Encode the public key */
2747 n = EC_POINT_point2oct(srvr_group,
2748 EC_KEY_get0_public_key(clnt_ecdh),
2749 POINT_CONVERSION_UNCOMPRESSED,
2750 encodedPoint, encoded_pt_len, bn_ctx);
2751
2752 *p = n; /* length of encoded point */
2753 /* Encoded point will be copied here */
2754 p += 1;
2755 /* copy the point */
2756 memcpy((unsigned char *)p, encodedPoint, n);
2757 /* increment n to account for length field */
2758 n += 1;
2759 }
2760
2761 /* Free allocated memory */
2762 BN_CTX_free(bn_ctx);
2763 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2764 if (clnt_ecdh != NULL)
2765 EC_KEY_free(clnt_ecdh);
2766 EVP_PKEY_free(srvr_pub_pkey);
2767 }
2768 #endif /* !OPENSSL_NO_ECDH */
2769 else if (alg_k & SSL_kGOST)
2770 {
2771 /* GOST key exchange message creation */
2772 EVP_PKEY_CTX *pkey_ctx;
2773 X509 *peer_cert;
2774 size_t msglen;
2775 unsigned int md_len;
2776 int keytype;
2777 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2778 EVP_MD_CTX *ukm_hash;
2779 EVP_PKEY *pub_key;
2780
2781 /* Get server sertificate PKEY and create ctx from it */
2782 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2783 if (!peer_cert)
2784 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2785 if (!peer_cert) {
2786 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2787 goto err;
2788 }
2789
2790 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2791 /* If we have send a certificate, and certificate key
2792
2793 * parameters match those of server certificate, use
2794 * certificate key for key exchange
2795 */
2796
2797 /* Otherwise, generate ephemeral key pair */
2798
2799 EVP_PKEY_encrypt_init(pkey_ctx);
2800 /* Generate session key */
2801 RAND_bytes(premaster_secret,32);
2802 /* If we have client certificate, use its secret as peer key */
2803 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2804 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
2805 /* If there was an error - just ignore it. Ephemeral key
2806 * would be used
2807 */
2808 ERR_clear_error();
2809 }
2810 }
2811 /* Compute shared IV and store it in algorithm-specific
2812 * context data */
2813 ukm_hash = EVP_MD_CTX_create();
2814 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
2815 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
2816 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
2817 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2818 EVP_MD_CTX_destroy(ukm_hash);
2819 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
2820 8,shared_ukm)<0) {
2821 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2822 SSL_R_LIBRARY_BUG);
2823 goto err;
2824 }
2825 /* Make GOST keytransport blob message */
2826 /*Encapsulate it into sequence */
2827 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2828 msglen=255;
2829 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
2830 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2831 SSL_R_LIBRARY_BUG);
2832 goto err;
2833 }
2834 if (msglen >= 0x80)
2835 {
2836 *(p++)=0x81;
2837 *(p++)= msglen & 0xff;
2838 n=msglen+3;
2839 }
2840 else
2841 {
2842 *(p++)= msglen & 0xff;
2843 n=msglen+2;
2844 }
2845 memcpy(p, tmp, msglen);
2846 /* Check if pubkey from client certificate was used */
2847 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2848 {
2849 /* Set flag "skip certificate verify" */
2850 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2851 }
2852 EVP_PKEY_CTX_free(pkey_ctx);
2853 s->session->master_key_length=
2854 s->method->ssl3_enc->generate_master_secret(s,
2855 s->session->master_key,premaster_secret,32);
2856 EVP_PKEY_free(pub_key);
2857
2858 }
2859 #ifndef OPENSSL_NO_SRP
2860 else if (alg_k & SSL_kSRP)
2861 {
2862 if (s->srp_ctx.A != NULL)
2863 {
2864 /* send off the data */
2865 n=BN_num_bytes(s->srp_ctx.A);
2866 s2n(n,p);
2867 BN_bn2bin(s->srp_ctx.A,p);
2868 n+=2;
2869 }
2870 else
2871 {
2872 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2873 goto err;
2874 }
2875 if (s->session->srp_username != NULL)
2876 OPENSSL_free(s->session->srp_username);
2877 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2878 if (s->session->srp_username == NULL)
2879 {
2880 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2881 ERR_R_MALLOC_FAILURE);
2882 goto err;
2883 }
2884
2885 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
2886 {
2887 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2888 goto err;
2889 }
2890 }
2891 #endif
2892 #ifndef OPENSSL_NO_PSK
2893 else if (alg_k & SSL_kPSK)
2894 {
2895 char identity[PSK_MAX_IDENTITY_LEN];
2896 unsigned char *t = NULL;
2897 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
2898 unsigned int pre_ms_len = 0, psk_len = 0;
2899 int psk_err = 1;
2900
2901 n = 0;
2902 if (s->psk_client_callback == NULL)
2903 {
2904 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2905 SSL_R_PSK_NO_CLIENT_CB);
2906 goto err;
2907 }
2908
2909 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
2910 identity, PSK_MAX_IDENTITY_LEN,
2911 psk_or_pre_ms, sizeof(psk_or_pre_ms));
2912 if (psk_len > PSK_MAX_PSK_LEN)
2913 {
2914 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2915 ERR_R_INTERNAL_ERROR);
2916 goto psk_err;
2917 }
2918 else if (psk_len == 0)
2919 {
2920 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2921 SSL_R_PSK_IDENTITY_NOT_FOUND);
2922 goto psk_err;
2923 }
2924
2925 /* create PSK pre_master_secret */
2926 pre_ms_len = 2+psk_len+2+psk_len;
2927 t = psk_or_pre_ms;
2928 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
2929 s2n(psk_len, t);
2930 memset(t, 0, psk_len);
2931 t+=psk_len;
2932 s2n(psk_len, t);
2933
2934 if (s->session->psk_identity_hint != NULL)
2935 OPENSSL_free(s->session->psk_identity_hint);
2936 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
2937 if (s->ctx->psk_identity_hint != NULL &&
2938 s->session->psk_identity_hint == NULL)
2939 {
2940 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2941 ERR_R_MALLOC_FAILURE);
2942 goto psk_err;
2943 }
2944
2945 if (s->session->psk_identity != NULL)
2946 OPENSSL_free(s->session->psk_identity);
2947 s->session->psk_identity = BUF_strdup(identity);
2948 if (s->session->psk_identity == NULL)
2949 {
2950 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2951 ERR_R_MALLOC_FAILURE);
2952 goto psk_err;
2953 }
2954
2955 s->session->master_key_length =
2956 s->method->ssl3_enc->generate_master_secret(s,
2957 s->session->master_key,
2958 psk_or_pre_ms, pre_ms_len);
2959 n = strlen(identity);
2960 s2n(n, p);
2961 memcpy(p, identity, n);
2962 n+=2;
2963 psk_err = 0;
2964 psk_err:
2965 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
2966 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
2967 if (psk_err != 0)
2968 {
2969 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2970 goto err;
2971 }
2972 }
2973 #endif
2974 else
2975 {
2976 ssl3_send_alert(s, SSL3_AL_FATAL,
2977 SSL_AD_HANDSHAKE_FAILURE);
2978 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2979 ERR_R_INTERNAL_ERROR);
2980 goto err;
2981 }
2982
2983 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
2984 l2n3(n,d);
2985
2986 s->state=SSL3_ST_CW_KEY_EXCH_B;
2987 /* number of bytes to write */
2988 s->init_num=n+4;
2989 s->init_off=0;
2990 }
2991
2992 /* SSL3_ST_CW_KEY_EXCH_B */
2993 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2994 err:
2995 #ifndef OPENSSL_NO_ECDH
2996 BN_CTX_free(bn_ctx);
2997 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2998 if (clnt_ecdh != NULL)
2999 EC_KEY_free(clnt_ecdh);
3000 EVP_PKEY_free(srvr_pub_pkey);
3001 #endif
3002 return(-1);
3003 }
3004
ssl3_send_client_verify(SSL * s)3005 int ssl3_send_client_verify(SSL *s)
3006 {
3007 unsigned char *p,*d;
3008 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
3009 EVP_PKEY *pkey;
3010 EVP_PKEY_CTX *pctx=NULL;
3011 EVP_MD_CTX mctx;
3012 unsigned u=0;
3013 unsigned long n;
3014 int j;
3015
3016 EVP_MD_CTX_init(&mctx);
3017
3018 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
3019 {
3020 d=(unsigned char *)s->init_buf->data;
3021 p= &(d[4]);
3022 pkey=s->cert->key->privatekey;
3023 /* Create context from key and test if sha1 is allowed as digest */
3024 pctx = EVP_PKEY_CTX_new(pkey,NULL);
3025 EVP_PKEY_sign_init(pctx);
3026 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
3027 {
3028 if (TLS1_get_version(s) < TLS1_2_VERSION)
3029 s->method->ssl3_enc->cert_verify_mac(s,
3030 NID_sha1,
3031 &(data[MD5_DIGEST_LENGTH]));
3032 }
3033 else
3034 {
3035 ERR_clear_error();
3036 }
3037 /* For TLS v1.2 send signature algorithm and signature
3038 * using agreed digest and cached handshake records.
3039 */
3040 if (TLS1_get_version(s) >= TLS1_2_VERSION)
3041 {
3042 long hdatalen = 0;
3043 void *hdata;
3044 const EVP_MD *md = s->cert->key->digest;
3045 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
3046 &hdata);
3047 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
3048 {
3049 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3050 ERR_R_INTERNAL_ERROR);
3051 goto err;
3052 }
3053 p += 2;
3054 #ifdef SSL_DEBUG
3055 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
3056 EVP_MD_name(md));
3057 #endif
3058 if (!EVP_SignInit_ex(&mctx, md, NULL)
3059 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3060 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
3061 {
3062 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3063 ERR_R_EVP_LIB);
3064 goto err;
3065 }
3066 s2n(u,p);
3067 n = u + 4;
3068 if (!ssl3_digest_cached_records(s))
3069 goto err;
3070 }
3071 else
3072 #ifndef OPENSSL_NO_RSA
3073 if (pkey->type == EVP_PKEY_RSA)
3074 {
3075 s->method->ssl3_enc->cert_verify_mac(s,
3076 NID_md5,
3077 &(data[0]));
3078 if (RSA_sign(NID_md5_sha1, data,
3079 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3080 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3081 {
3082 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3083 goto err;
3084 }
3085 s2n(u,p);
3086 n=u+2;
3087 }
3088 else
3089 #endif
3090 #ifndef OPENSSL_NO_DSA
3091 if (pkey->type == EVP_PKEY_DSA)
3092 {
3093 if (!DSA_sign(pkey->save_type,
3094 &(data[MD5_DIGEST_LENGTH]),
3095 SHA_DIGEST_LENGTH,&(p[2]),
3096 (unsigned int *)&j,pkey->pkey.dsa))
3097 {
3098 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3099 goto err;
3100 }
3101 s2n(j,p);
3102 n=j+2;
3103 }
3104 else
3105 #endif
3106 #ifndef OPENSSL_NO_ECDSA
3107 if (pkey->type == EVP_PKEY_EC)
3108 {
3109 if (!ECDSA_sign(pkey->save_type,
3110 &(data[MD5_DIGEST_LENGTH]),
3111 SHA_DIGEST_LENGTH,&(p[2]),
3112 (unsigned int *)&j,pkey->pkey.ec))
3113 {
3114 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3115 ERR_R_ECDSA_LIB);
3116 goto err;
3117 }
3118 s2n(j,p);
3119 n=j+2;
3120 }
3121 else
3122 #endif
3123 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3124 {
3125 unsigned char signbuf[64];
3126 int i;
3127 size_t sigsize=64;
3128 s->method->ssl3_enc->cert_verify_mac(s,
3129 NID_id_GostR3411_94,
3130 data);
3131 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3132 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3133 ERR_R_INTERNAL_ERROR);
3134 goto err;
3135 }
3136 for (i=63,j=0; i>=0; j++, i--) {
3137 p[2+j]=signbuf[i];
3138 }
3139 s2n(j,p);
3140 n=j+2;
3141 }
3142 else
3143 {
3144 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3145 goto err;
3146 }
3147 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
3148 l2n3(n,d);
3149
3150 s->state=SSL3_ST_CW_CERT_VRFY_B;
3151 s->init_num=(int)n+4;
3152 s->init_off=0;
3153 }
3154 EVP_MD_CTX_cleanup(&mctx);
3155 EVP_PKEY_CTX_free(pctx);
3156 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3157 err:
3158 EVP_MD_CTX_cleanup(&mctx);
3159 EVP_PKEY_CTX_free(pctx);
3160 return(-1);
3161 }
3162
ssl3_send_client_certificate(SSL * s)3163 int ssl3_send_client_certificate(SSL *s)
3164 {
3165 X509 *x509=NULL;
3166 EVP_PKEY *pkey=NULL;
3167 int i;
3168 unsigned long l;
3169
3170 if (s->state == SSL3_ST_CW_CERT_A)
3171 {
3172 if ((s->cert == NULL) ||
3173 (s->cert->key->x509 == NULL) ||
3174 (s->cert->key->privatekey == NULL))
3175 s->state=SSL3_ST_CW_CERT_B;
3176 else
3177 s->state=SSL3_ST_CW_CERT_C;
3178 }
3179
3180 /* We need to get a client cert */
3181 if (s->state == SSL3_ST_CW_CERT_B)
3182 {
3183 /* If we get an error, we need to
3184 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3185 * We then get retied later */
3186 i=0;
3187 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3188 if (i < 0)
3189 {
3190 s->rwstate=SSL_X509_LOOKUP;
3191 return(-1);
3192 }
3193 s->rwstate=SSL_NOTHING;
3194 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3195 {
3196 s->state=SSL3_ST_CW_CERT_B;
3197 if ( !SSL_use_certificate(s,x509) ||
3198 !SSL_use_PrivateKey(s,pkey))
3199 i=0;
3200 }
3201 else if (i == 1)
3202 {
3203 i=0;
3204 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3205 }
3206
3207 if (x509 != NULL) X509_free(x509);
3208 if (pkey != NULL) EVP_PKEY_free(pkey);
3209 if (i == 0)
3210 {
3211 if (s->version == SSL3_VERSION)
3212 {
3213 s->s3->tmp.cert_req=0;
3214 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3215 return(1);
3216 }
3217 else
3218 {
3219 s->s3->tmp.cert_req=2;
3220 }
3221 }
3222
3223 /* Ok, we have a cert */
3224 s->state=SSL3_ST_CW_CERT_C;
3225 }
3226
3227 if (s->state == SSL3_ST_CW_CERT_C)
3228 {
3229 s->state=SSL3_ST_CW_CERT_D;
3230 l=ssl3_output_cert_chain(s,
3231 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
3232 s->init_num=(int)l;
3233 s->init_off=0;
3234 }
3235 /* SSL3_ST_CW_CERT_D */
3236 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3237 }
3238
3239 #define has_bits(i,m) (((i)&(m)) == (m))
3240
ssl3_check_cert_and_algorithm(SSL * s)3241 int ssl3_check_cert_and_algorithm(SSL *s)
3242 {
3243 int i,idx;
3244 long alg_k,alg_a;
3245 EVP_PKEY *pkey=NULL;
3246 SESS_CERT *sc;
3247 #ifndef OPENSSL_NO_RSA
3248 RSA *rsa;
3249 #endif
3250 #ifndef OPENSSL_NO_DH
3251 DH *dh;
3252 #endif
3253
3254 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3255 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3256
3257 /* we don't have a certificate */
3258 if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3259 return(1);
3260
3261 sc=s->session->sess_cert;
3262 if (sc == NULL)
3263 {
3264 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3265 goto err;
3266 }
3267
3268 #ifndef OPENSSL_NO_RSA
3269 rsa=s->session->sess_cert->peer_rsa_tmp;
3270 #endif
3271 #ifndef OPENSSL_NO_DH
3272 dh=s->session->sess_cert->peer_dh_tmp;
3273 #endif
3274
3275 /* This is the passed certificate */
3276
3277 idx=sc->peer_cert_type;
3278 #ifndef OPENSSL_NO_ECDH
3279 if (idx == SSL_PKEY_ECC)
3280 {
3281 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3282 s) == 0)
3283 { /* check failed */
3284 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3285 goto f_err;
3286 }
3287 else
3288 {
3289 return 1;
3290 }
3291 }
3292 #endif
3293 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3294 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3295 EVP_PKEY_free(pkey);
3296
3297
3298 /* Check that we have a certificate if we require one */
3299 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3300 {
3301 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3302 goto f_err;
3303 }
3304 #ifndef OPENSSL_NO_DSA
3305 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3306 {
3307 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3308 goto f_err;
3309 }
3310 #endif
3311 #ifndef OPENSSL_NO_RSA
3312 if ((alg_k & SSL_kRSA) &&
3313 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3314 {
3315 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3316 goto f_err;
3317 }
3318 #endif
3319 #ifndef OPENSSL_NO_DH
3320 if ((alg_k & SSL_kEDH) &&
3321 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3322 {
3323 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3324 goto f_err;
3325 }
3326 else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3327 {
3328 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3329 goto f_err;
3330 }
3331 #ifndef OPENSSL_NO_DSA
3332 else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3333 {
3334 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3335 goto f_err;
3336 }
3337 #endif
3338 #endif
3339
3340 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3341 {
3342 #ifndef OPENSSL_NO_RSA
3343 if (alg_k & SSL_kRSA)
3344 {
3345 if (rsa == NULL
3346 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3347 {
3348 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3349 goto f_err;
3350 }
3351 }
3352 else
3353 #endif
3354 #ifndef OPENSSL_NO_DH
3355 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
3356 {
3357 if (dh == NULL
3358 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3359 {
3360 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3361 goto f_err;
3362 }
3363 }
3364 else
3365 #endif
3366 {
3367 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3368 goto f_err;
3369 }
3370 }
3371 return(1);
3372 f_err:
3373 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3374 err:
3375 return(0);
3376 }
3377
3378 #if !defined(OPENSSL_NO_TLSEXT)
3379 # if !defined(OPENSSL_NO_NEXTPROTONEG)
ssl3_send_next_proto(SSL * s)3380 int ssl3_send_next_proto(SSL *s)
3381 {
3382 unsigned int len, padding_len;
3383 unsigned char *d;
3384
3385 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3386 {
3387 len = s->next_proto_negotiated_len;
3388 padding_len = 32 - ((len + 2) % 32);
3389 d = (unsigned char *)s->init_buf->data;
3390 d[4] = len;
3391 memcpy(d + 5, s->next_proto_negotiated, len);
3392 d[5 + len] = padding_len;
3393 memset(d + 6 + len, 0, padding_len);
3394 *(d++)=SSL3_MT_NEXT_PROTO;
3395 l2n3(2 + len + padding_len, d);
3396 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3397 s->init_num = 4 + 2 + len + padding_len;
3398 s->init_off = 0;
3399 }
3400
3401 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3402 }
3403 # endif /* !OPENSSL_NO_NEXTPROTONEG */
3404
ssl3_send_channel_id(SSL * s)3405 int ssl3_send_channel_id(SSL *s)
3406 {
3407 unsigned char *d;
3408 int ret = -1, public_key_len;
3409 EVP_MD_CTX md_ctx;
3410 size_t sig_len;
3411 ECDSA_SIG *sig = NULL;
3412 unsigned char *public_key = NULL, *derp, *der_sig = NULL;
3413
3414 if (s->state != SSL3_ST_CW_CHANNEL_ID_A)
3415 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3416
3417 d = (unsigned char *)s->init_buf->data;
3418 *(d++)=SSL3_MT_ENCRYPTED_EXTENSIONS;
3419 l2n3(2 + 2 + TLSEXT_CHANNEL_ID_SIZE, d);
3420 s2n(TLSEXT_TYPE_channel_id, d);
3421 s2n(TLSEXT_CHANNEL_ID_SIZE, d);
3422
3423 EVP_MD_CTX_init(&md_ctx);
3424
3425 public_key_len = i2d_PublicKey(s->tlsext_channel_id_private, NULL);
3426 if (public_key_len <= 0)
3427 {
3428 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,SSL_R_CANNOT_SERIALIZE_PUBLIC_KEY);
3429 goto err;
3430 }
3431 // i2d_PublicKey will produce an ANSI X9.62 public key which, for a
3432 // P-256 key, is 0x04 (meaning uncompressed) followed by the x and y
3433 // field elements as 32-byte, big-endian numbers.
3434 if (public_key_len != 65)
3435 {
3436 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,SSL_R_CHANNEL_ID_NOT_P256);
3437 goto err;
3438 }
3439 public_key = OPENSSL_malloc(public_key_len);
3440 if (!public_key)
3441 {
3442 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,ERR_R_MALLOC_FAILURE);
3443 goto err;
3444 }
3445
3446 derp = public_key;
3447 i2d_PublicKey(s->tlsext_channel_id_private, &derp);
3448
3449 if (EVP_DigestSignInit(&md_ctx, NULL, EVP_sha256(), NULL,
3450 s->tlsext_channel_id_private) != 1)
3451 {
3452 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,SSL_R_EVP_DIGESTSIGNINIT_FAILED);
3453 goto err;
3454 }
3455
3456 if (!tls1_channel_id_hash(&md_ctx, s))
3457 goto err;
3458
3459 if (!EVP_DigestSignFinal(&md_ctx, NULL, &sig_len))
3460 {
3461 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,SSL_R_EVP_DIGESTSIGNFINAL_FAILED);
3462 goto err;
3463 }
3464
3465 der_sig = OPENSSL_malloc(sig_len);
3466 if (!der_sig)
3467 {
3468 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,ERR_R_MALLOC_FAILURE);
3469 goto err;
3470 }
3471
3472 if (!EVP_DigestSignFinal(&md_ctx, der_sig, &sig_len))
3473 {
3474 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,SSL_R_EVP_DIGESTSIGNFINAL_FAILED);
3475 goto err;
3476 }
3477
3478 derp = der_sig;
3479 sig = d2i_ECDSA_SIG(NULL, (const unsigned char**)&derp, sig_len);
3480 if (sig == NULL)
3481 {
3482 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,SSL_R_D2I_ECDSA_SIG);
3483 goto err;
3484 }
3485
3486 // The first byte of public_key will be 0x4, denoting an uncompressed key.
3487 memcpy(d, public_key + 1, 64);
3488 d += 64;
3489 memset(d, 0, 2 * 32);
3490 BN_bn2bin(sig->r, d + 32 - BN_num_bytes(sig->r));
3491 d += 32;
3492 BN_bn2bin(sig->s, d + 32 - BN_num_bytes(sig->s));
3493 d += 32;
3494
3495 s->state = SSL3_ST_CW_CHANNEL_ID_B;
3496 s->init_num = 4 + 2 + 2 + TLSEXT_CHANNEL_ID_SIZE;
3497 s->init_off = 0;
3498
3499 ret = ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3500
3501 err:
3502 EVP_MD_CTX_cleanup(&md_ctx);
3503 if (public_key)
3504 OPENSSL_free(public_key);
3505 if (der_sig)
3506 OPENSSL_free(der_sig);
3507 if (sig)
3508 ECDSA_SIG_free(sig);
3509
3510 return ret;
3511 }
3512 #endif /* !OPENSSL_NO_TLSEXT */
3513
3514 /* Check to see if handshake is full or resumed. Usually this is just a
3515 * case of checking to see if a cache hit has occurred. In the case of
3516 * session tickets we have to check the next message to be sure.
3517 */
3518
3519 #ifndef OPENSSL_NO_TLSEXT
ssl3_check_finished(SSL * s)3520 int ssl3_check_finished(SSL *s)
3521 {
3522 int ok;
3523 long n;
3524 /* If we have no ticket it cannot be a resumed session. */
3525 if (!s->session->tlsext_tick)
3526 return 1;
3527 /* this function is called when we really expect a Certificate
3528 * message, so permit appropriate message length */
3529 n=s->method->ssl_get_message(s,
3530 SSL3_ST_CR_CERT_A,
3531 SSL3_ST_CR_CERT_B,
3532 -1,
3533 s->max_cert_list,
3534 &ok);
3535 if (!ok) return((int)n);
3536 s->s3->tmp.reuse_message = 1;
3537 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3538 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3539 return 2;
3540
3541 return 1;
3542 }
3543 #endif
3544
ssl_do_client_cert_cb(SSL * s,X509 ** px509,EVP_PKEY ** ppkey)3545 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3546 {
3547 int i = 0;
3548 #ifndef OPENSSL_NO_ENGINE
3549 if (s->ctx->client_cert_engine)
3550 {
3551 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3552 SSL_get_client_CA_list(s),
3553 px509, ppkey, NULL, NULL, NULL);
3554 if (i != 0)
3555 return i;
3556 }
3557 #endif
3558 if (s->ctx->client_cert_cb)
3559 i = s->ctx->client_cert_cb(s,px509,ppkey);
3560 return i;
3561 }
3562