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give more meaningful error if presented with wrong certificate type by server
[thirdparty/openssl.git] / ssl / s3_clnt.c
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
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
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 for (;;)
219 {
220 state=s->state;
221
222 switch(s->state)
223 {
224 case SSL_ST_RENEGOTIATE:
225 s->renegotiate=1;
226 s->state=SSL_ST_CONNECT;
227 s->ctx->stats.sess_connect_renegotiate++;
228 /* break */
229 case SSL_ST_BEFORE:
230 case SSL_ST_CONNECT:
231 case SSL_ST_BEFORE|SSL_ST_CONNECT:
232 case SSL_ST_OK|SSL_ST_CONNECT:
233
234 s->server=0;
235 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
236
237 if ((s->version & 0xff00 ) != 0x0300)
238 {
239 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
240 ret = -1;
241 goto end;
242 }
243
244 /* s->version=SSL3_VERSION; */
245 s->type=SSL_ST_CONNECT;
246
247 if (s->init_buf == NULL)
248 {
249 if ((buf=BUF_MEM_new()) == NULL)
250 {
251 ret= -1;
252 goto end;
253 }
254 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
255 {
256 ret= -1;
257 goto end;
258 }
259 s->init_buf=buf;
260 buf=NULL;
261 }
262
263 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
264
265 /* setup buffing BIO */
266 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
267
268 /* don't push the buffering BIO quite yet */
269
270 ssl3_init_finished_mac(s);
271
272 s->state=SSL3_ST_CW_CLNT_HELLO_A;
273 s->ctx->stats.sess_connect++;
274 s->init_num=0;
275 break;
276
277 case SSL3_ST_CW_CLNT_HELLO_A:
278 case SSL3_ST_CW_CLNT_HELLO_B:
279
280 s->shutdown=0;
281 ret=ssl3_client_hello(s);
282 if (ret <= 0) goto end;
283 s->state=SSL3_ST_CR_SRVR_HELLO_A;
284 s->init_num=0;
285
286 /* turn on buffering for the next lot of output */
287 if (s->bbio != s->wbio)
288 s->wbio=BIO_push(s->bbio,s->wbio);
289
290 break;
291
292 case SSL3_ST_CR_SRVR_HELLO_A:
293 case SSL3_ST_CR_SRVR_HELLO_B:
294 ret=ssl3_get_server_hello(s);
295 if (ret <= 0) goto end;
296
297 if (s->hit)
298 {
299 s->state=SSL3_ST_CR_FINISHED_A;
300 #ifndef OPENSSL_NO_TLSEXT
301 if (s->tlsext_ticket_expected)
302 {
303 /* receive renewed session ticket */
304 s->state=SSL3_ST_CR_SESSION_TICKET_A;
305 }
306 #endif
307 }
308 else
309 {
310 #ifndef OPENSSL_NO_TLSEXT
311 /* The server hello indicated that
312 * an audit proof would follow. */
313 if (s->s3->tlsext_authz_server_promised)
314 s->state=SSL3_ST_CR_SUPPLEMENTAL_DATA_A;
315 else
316 #endif
317 s->state=SSL3_ST_CR_CERT_A;
318 }
319 s->init_num=0;
320 break;
321 #ifndef OPENSSL_NO_TLSEXT
322 case SSL3_ST_CR_SUPPLEMENTAL_DATA_A:
323 case SSL3_ST_CR_SUPPLEMENTAL_DATA_B:
324 ret = tls1_get_server_supplemental_data(s);
325 if (ret <= 0) goto end;
326 s->state=SSL3_ST_CR_CERT_A;
327 s->init_num = 0;
328 break;
329 #endif
330 case SSL3_ST_CR_CERT_A:
331 case SSL3_ST_CR_CERT_B:
332 #ifndef OPENSSL_NO_TLSEXT
333 ret=ssl3_check_finished(s);
334 if (ret <= 0) goto end;
335 if (ret == 2)
336 {
337 s->hit = 1;
338 if (s->tlsext_ticket_expected)
339 s->state=SSL3_ST_CR_SESSION_TICKET_A;
340 else
341 s->state=SSL3_ST_CR_FINISHED_A;
342 s->init_num=0;
343 break;
344 }
345 #endif
346 /* Check if it is anon DH/ECDH */
347 /* or PSK */
348 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
349 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
350 {
351 ret=ssl3_get_server_certificate(s);
352 if (ret <= 0) goto end;
353 #ifndef OPENSSL_NO_TLSEXT
354 if (s->tlsext_status_expected)
355 s->state=SSL3_ST_CR_CERT_STATUS_A;
356 else
357 s->state=SSL3_ST_CR_KEY_EXCH_A;
358 }
359 else
360 {
361 skip = 1;
362 s->state=SSL3_ST_CR_KEY_EXCH_A;
363 }
364 #else
365 }
366 else
367 skip=1;
368
369 s->state=SSL3_ST_CR_KEY_EXCH_A;
370 #endif
371 s->init_num=0;
372 break;
373
374 case SSL3_ST_CR_KEY_EXCH_A:
375 case SSL3_ST_CR_KEY_EXCH_B:
376 ret=ssl3_get_key_exchange(s);
377 if (ret <= 0) goto end;
378 s->state=SSL3_ST_CR_CERT_REQ_A;
379 s->init_num=0;
380
381 /* at this point we check that we have the
382 * required stuff from the server */
383 if (!ssl3_check_cert_and_algorithm(s))
384 {
385 ret= -1;
386 goto end;
387 }
388 break;
389
390 case SSL3_ST_CR_CERT_REQ_A:
391 case SSL3_ST_CR_CERT_REQ_B:
392 ret=ssl3_get_certificate_request(s);
393 if (ret <= 0) goto end;
394 s->state=SSL3_ST_CR_SRVR_DONE_A;
395 s->init_num=0;
396 break;
397
398 case SSL3_ST_CR_SRVR_DONE_A:
399 case SSL3_ST_CR_SRVR_DONE_B:
400 ret=ssl3_get_server_done(s);
401 if (ret <= 0) goto end;
402 #ifndef OPENSSL_NO_SRP
403 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP)
404 {
405 if ((ret = SRP_Calc_A_param(s))<=0)
406 {
407 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
408 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
409 goto end;
410 }
411 }
412 #endif
413 if (s->s3->tmp.cert_req)
414 s->state=SSL3_ST_CW_CERT_A;
415 else
416 s->state=SSL3_ST_CW_KEY_EXCH_A;
417 s->init_num=0;
418
419 break;
420
421 case SSL3_ST_CW_CERT_A:
422 case SSL3_ST_CW_CERT_B:
423 case SSL3_ST_CW_CERT_C:
424 case SSL3_ST_CW_CERT_D:
425 ret=ssl3_send_client_certificate(s);
426 if (ret <= 0) goto end;
427 s->state=SSL3_ST_CW_KEY_EXCH_A;
428 s->init_num=0;
429 break;
430
431 case SSL3_ST_CW_KEY_EXCH_A:
432 case SSL3_ST_CW_KEY_EXCH_B:
433 ret=ssl3_send_client_key_exchange(s);
434 if (ret <= 0) goto end;
435 /* EAY EAY EAY need to check for DH fix cert
436 * sent back */
437 /* For TLS, cert_req is set to 2, so a cert chain
438 * of nothing is sent, but no verify packet is sent */
439 /* XXX: For now, we do not support client
440 * authentication in ECDH cipher suites with
441 * ECDH (rather than ECDSA) certificates.
442 * We need to skip the certificate verify
443 * message when client's ECDH public key is sent
444 * inside the client certificate.
445 */
446 if (s->s3->tmp.cert_req == 1)
447 {
448 s->state=SSL3_ST_CW_CERT_VRFY_A;
449 }
450 else
451 {
452 s->state=SSL3_ST_CW_CHANGE_A;
453 s->s3->change_cipher_spec=0;
454 }
455 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
456 {
457 s->state=SSL3_ST_CW_CHANGE_A;
458 s->s3->change_cipher_spec=0;
459 }
460
461 s->init_num=0;
462 break;
463
464 case SSL3_ST_CW_CERT_VRFY_A:
465 case SSL3_ST_CW_CERT_VRFY_B:
466 ret=ssl3_send_client_verify(s);
467 if (ret <= 0) goto end;
468 s->state=SSL3_ST_CW_CHANGE_A;
469 s->init_num=0;
470 s->s3->change_cipher_spec=0;
471 break;
472
473 case SSL3_ST_CW_CHANGE_A:
474 case SSL3_ST_CW_CHANGE_B:
475 ret=ssl3_send_change_cipher_spec(s,
476 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
477 if (ret <= 0) goto end;
478
479 #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
480 s->state=SSL3_ST_CW_FINISHED_A;
481 #else
482 if (s->s3->next_proto_neg_seen)
483 s->state=SSL3_ST_CW_NEXT_PROTO_A;
484 else
485 s->state=SSL3_ST_CW_FINISHED_A;
486 #endif
487 s->init_num=0;
488
489 s->session->cipher=s->s3->tmp.new_cipher;
490 #ifdef OPENSSL_NO_COMP
491 s->session->compress_meth=0;
492 #else
493 if (s->s3->tmp.new_compression == NULL)
494 s->session->compress_meth=0;
495 else
496 s->session->compress_meth=
497 s->s3->tmp.new_compression->id;
498 #endif
499 if (!s->method->ssl3_enc->setup_key_block(s))
500 {
501 ret= -1;
502 goto end;
503 }
504
505 if (!s->method->ssl3_enc->change_cipher_state(s,
506 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
507 {
508 ret= -1;
509 goto end;
510 }
511
512 break;
513
514 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
515 case SSL3_ST_CW_NEXT_PROTO_A:
516 case SSL3_ST_CW_NEXT_PROTO_B:
517 ret=ssl3_send_next_proto(s);
518 if (ret <= 0) goto end;
519 s->state=SSL3_ST_CW_FINISHED_A;
520 break;
521 #endif
522
523 case SSL3_ST_CW_FINISHED_A:
524 case SSL3_ST_CW_FINISHED_B:
525 ret=ssl3_send_finished(s,
526 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
527 s->method->ssl3_enc->client_finished_label,
528 s->method->ssl3_enc->client_finished_label_len);
529 if (ret <= 0) goto end;
530 s->state=SSL3_ST_CW_FLUSH;
531
532 /* clear flags */
533 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
534 if (s->hit)
535 {
536 s->s3->tmp.next_state=SSL_ST_OK;
537 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
538 {
539 s->state=SSL_ST_OK;
540 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
541 s->s3->delay_buf_pop_ret=0;
542 }
543 }
544 else
545 {
546 #ifndef OPENSSL_NO_TLSEXT
547 /* Allow NewSessionTicket if ticket expected */
548 if (s->tlsext_ticket_expected)
549 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
550 else
551 #endif
552
553 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
554 }
555 s->init_num=0;
556 break;
557
558 #ifndef OPENSSL_NO_TLSEXT
559 case SSL3_ST_CR_SESSION_TICKET_A:
560 case SSL3_ST_CR_SESSION_TICKET_B:
561 ret=ssl3_get_new_session_ticket(s);
562 if (ret <= 0) goto end;
563 s->state=SSL3_ST_CR_FINISHED_A;
564 s->init_num=0;
565 break;
566
567 case SSL3_ST_CR_CERT_STATUS_A:
568 case SSL3_ST_CR_CERT_STATUS_B:
569 ret=ssl3_get_cert_status(s);
570 if (ret <= 0) goto end;
571 s->state=SSL3_ST_CR_KEY_EXCH_A;
572 s->init_num=0;
573 break;
574 #endif
575
576 case SSL3_ST_CR_FINISHED_A:
577 case SSL3_ST_CR_FINISHED_B:
578
579 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
580 SSL3_ST_CR_FINISHED_B);
581 if (ret <= 0) goto end;
582
583 if (s->hit)
584 s->state=SSL3_ST_CW_CHANGE_A;
585 else
586 s->state=SSL_ST_OK;
587 s->init_num=0;
588 break;
589
590 case SSL3_ST_CW_FLUSH:
591 s->rwstate=SSL_WRITING;
592 if (BIO_flush(s->wbio) <= 0)
593 {
594 ret= -1;
595 goto end;
596 }
597 s->rwstate=SSL_NOTHING;
598 s->state=s->s3->tmp.next_state;
599 break;
600
601 case SSL_ST_OK:
602 /* clean a few things up */
603 ssl3_cleanup_key_block(s);
604
605 if (s->init_buf != NULL)
606 {
607 BUF_MEM_free(s->init_buf);
608 s->init_buf=NULL;
609 }
610
611 /* If we are not 'joining' the last two packets,
612 * remove the buffering now */
613 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
614 ssl_free_wbio_buffer(s);
615 /* else do it later in ssl3_write */
616
617 s->init_num=0;
618 s->renegotiate=0;
619 s->new_session=0;
620
621 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
622 if (s->hit) s->ctx->stats.sess_hit++;
623
624 ret=1;
625 /* s->server=0; */
626 s->handshake_func=ssl3_connect;
627 s->ctx->stats.sess_connect_good++;
628
629 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
630
631 goto end;
632 /* break; */
633
634 default:
635 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
636 ret= -1;
637 goto end;
638 /* break; */
639 }
640
641 /* did we do anything */
642 if (!s->s3->tmp.reuse_message && !skip)
643 {
644 if (s->debug)
645 {
646 if ((ret=BIO_flush(s->wbio)) <= 0)
647 goto end;
648 }
649
650 if ((cb != NULL) && (s->state != state))
651 {
652 new_state=s->state;
653 s->state=state;
654 cb(s,SSL_CB_CONNECT_LOOP,1);
655 s->state=new_state;
656 }
657 }
658 skip=0;
659 }
660 end:
661 s->in_handshake--;
662 if (buf != NULL)
663 BUF_MEM_free(buf);
664 if (cb != NULL)
665 cb(s,SSL_CB_CONNECT_EXIT,ret);
666 return(ret);
667 }
668
669
670 int ssl3_client_hello(SSL *s)
671 {
672 unsigned char *buf;
673 unsigned char *p,*d;
674 int i;
675 unsigned long Time,l;
676 #ifndef OPENSSL_NO_COMP
677 int j;
678 SSL_COMP *comp;
679 #endif
680
681 buf=(unsigned char *)s->init_buf->data;
682 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
683 {
684 SSL_SESSION *sess = s->session;
685 if ((sess == NULL) ||
686 (sess->ssl_version != s->version) ||
687 #ifdef OPENSSL_NO_TLSEXT
688 !sess->session_id_length ||
689 #else
690 (!sess->session_id_length && !sess->tlsext_tick) ||
691 #endif
692 (sess->not_resumable))
693 {
694 if (!ssl_get_new_session(s,0))
695 goto err;
696 }
697 /* else use the pre-loaded session */
698
699 p=s->s3->client_random;
700 Time=(unsigned long)time(NULL); /* Time */
701 l2n(Time,p);
702 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
703 goto err;
704
705 /* Do the message type and length last */
706 d=p= &(buf[4]);
707
708 /* version indicates the negotiated version: for example from
709 * an SSLv2/v3 compatible client hello). The client_version
710 * field is the maximum version we permit and it is also
711 * used in RSA encrypted premaster secrets. Some servers can
712 * choke if we initially report a higher version then
713 * renegotiate to a lower one in the premaster secret. This
714 * didn't happen with TLS 1.0 as most servers supported it
715 * but it can with TLS 1.1 or later if the server only supports
716 * 1.0.
717 *
718 * Possible scenario with previous logic:
719 * 1. Client hello indicates TLS 1.2
720 * 2. Server hello says TLS 1.0
721 * 3. RSA encrypted premaster secret uses 1.2.
722 * 4. Handhaked proceeds using TLS 1.0.
723 * 5. Server sends hello request to renegotiate.
724 * 6. Client hello indicates TLS v1.0 as we now
725 * know that is maximum server supports.
726 * 7. Server chokes on RSA encrypted premaster secret
727 * containing version 1.0.
728 *
729 * For interoperability it should be OK to always use the
730 * maximum version we support in client hello and then rely
731 * on the checking of version to ensure the servers isn't
732 * being inconsistent: for example initially negotiating with
733 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
734 * client_version in client hello and not resetting it to
735 * the negotiated version.
736 */
737 #if 0
738 *(p++)=s->version>>8;
739 *(p++)=s->version&0xff;
740 s->client_version=s->version;
741 #else
742 *(p++)=s->client_version>>8;
743 *(p++)=s->client_version&0xff;
744 #endif
745
746 /* Random stuff */
747 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
748 p+=SSL3_RANDOM_SIZE;
749
750 /* Session ID */
751 if (s->new_session)
752 i=0;
753 else
754 i=s->session->session_id_length;
755 *(p++)=i;
756 if (i != 0)
757 {
758 if (i > (int)sizeof(s->session->session_id))
759 {
760 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
761 goto err;
762 }
763 memcpy(p,s->session->session_id,i);
764 p+=i;
765 }
766
767 /* Ciphers supported */
768 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
769 if (i == 0)
770 {
771 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
772 goto err;
773 }
774 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
775 /* Some servers hang if client hello > 256 bytes
776 * as hack workaround chop number of supported ciphers
777 * to keep it well below this if we use TLS v1.2
778 */
779 if (TLS1_get_version(s) >= TLS1_2_VERSION
780 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
781 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
782 #endif
783 s2n(i,p);
784 p+=i;
785
786 /* COMPRESSION */
787 #ifdef OPENSSL_NO_COMP
788 *(p++)=1;
789 #else
790
791 if ((s->options & SSL_OP_NO_COMPRESSION)
792 || !s->ctx->comp_methods)
793 j=0;
794 else
795 j=sk_SSL_COMP_num(s->ctx->comp_methods);
796 *(p++)=1+j;
797 for (i=0; i<j; i++)
798 {
799 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
800 *(p++)=comp->id;
801 }
802 #endif
803 *(p++)=0; /* Add the NULL method */
804
805 #ifndef OPENSSL_NO_TLSEXT
806 /* TLS extensions*/
807 if (ssl_prepare_clienthello_tlsext(s) <= 0)
808 {
809 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
810 goto err;
811 }
812 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
813 {
814 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
815 goto err;
816 }
817 #endif
818
819 l=(p-d);
820 d=buf;
821 *(d++)=SSL3_MT_CLIENT_HELLO;
822 l2n3(l,d);
823
824 s->state=SSL3_ST_CW_CLNT_HELLO_B;
825 /* number of bytes to write */
826 s->init_num=p-buf;
827 s->init_off=0;
828 }
829
830 /* SSL3_ST_CW_CLNT_HELLO_B */
831 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
832 err:
833 return(-1);
834 }
835
836 int ssl3_get_server_hello(SSL *s)
837 {
838 STACK_OF(SSL_CIPHER) *sk;
839 const SSL_CIPHER *c;
840 CERT *ct = s->cert;
841 unsigned char *p,*d;
842 int i,al=SSL_AD_INTERNAL_ERROR,ok;
843 unsigned int j;
844 long n;
845 #ifndef OPENSSL_NO_COMP
846 SSL_COMP *comp;
847 #endif
848
849 n=s->method->ssl_get_message(s,
850 SSL3_ST_CR_SRVR_HELLO_A,
851 SSL3_ST_CR_SRVR_HELLO_B,
852 -1,
853 20000, /* ?? */
854 &ok);
855
856 if (!ok) return((int)n);
857
858 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
859 {
860 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
861 {
862 if ( s->d1->send_cookie == 0)
863 {
864 s->s3->tmp.reuse_message = 1;
865 return 1;
866 }
867 else /* already sent a cookie */
868 {
869 al=SSL_AD_UNEXPECTED_MESSAGE;
870 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
871 goto f_err;
872 }
873 }
874 }
875
876 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
877 {
878 al=SSL_AD_UNEXPECTED_MESSAGE;
879 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
880 goto f_err;
881 }
882
883 d=p=(unsigned char *)s->init_msg;
884
885 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
886 {
887 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
888 s->version=(s->version&0xff00)|p[1];
889 al=SSL_AD_PROTOCOL_VERSION;
890 goto f_err;
891 }
892 p+=2;
893
894 /* load the server hello data */
895 /* load the server random */
896 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
897 p+=SSL3_RANDOM_SIZE;
898
899 /* get the session-id */
900 j= *(p++);
901
902 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
903 {
904 al=SSL_AD_ILLEGAL_PARAMETER;
905 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
906 goto f_err;
907 }
908
909 #ifndef OPENSSL_NO_TLSEXT
910 /* check if we want to resume the session based on external pre-shared secret */
911 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
912 {
913 SSL_CIPHER *pref_cipher=NULL;
914 s->session->master_key_length=sizeof(s->session->master_key);
915 if (s->tls_session_secret_cb(s, s->session->master_key,
916 &s->session->master_key_length,
917 NULL, &pref_cipher,
918 s->tls_session_secret_cb_arg))
919 {
920 s->session->cipher = pref_cipher ?
921 pref_cipher : ssl_get_cipher_by_char(s, p+j);
922 }
923 }
924 #endif /* OPENSSL_NO_TLSEXT */
925
926 if (j != 0 && j == s->session->session_id_length
927 && memcmp(p,s->session->session_id,j) == 0)
928 {
929 if(s->sid_ctx_length != s->session->sid_ctx_length
930 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
931 {
932 /* actually a client application bug */
933 al=SSL_AD_ILLEGAL_PARAMETER;
934 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
935 goto f_err;
936 }
937 s->hit=1;
938 }
939 else /* a miss or crap from the other end */
940 {
941 /* If we were trying for session-id reuse, make a new
942 * SSL_SESSION so we don't stuff up other people */
943 s->hit=0;
944 if (s->session->session_id_length > 0)
945 {
946 if (!ssl_get_new_session(s,0))
947 {
948 goto f_err;
949 }
950 }
951 s->session->session_id_length=j;
952 memcpy(s->session->session_id,p,j); /* j could be 0 */
953 }
954 p+=j;
955 c=ssl_get_cipher_by_char(s,p);
956 if (c == NULL)
957 {
958 /* unknown cipher */
959 al=SSL_AD_ILLEGAL_PARAMETER;
960 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
961 goto f_err;
962 }
963 /* If it is a disabled cipher we didn't send it in client hello,
964 * so return an error.
965 */
966 if (c->algorithm_ssl & ct->mask_ssl ||
967 c->algorithm_mkey & ct->mask_k ||
968 c->algorithm_auth & ct->mask_a)
969 {
970 al=SSL_AD_ILLEGAL_PARAMETER;
971 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
972 goto f_err;
973 }
974 p+=ssl_put_cipher_by_char(s,NULL,NULL);
975
976 sk=ssl_get_ciphers_by_id(s);
977 i=sk_SSL_CIPHER_find(sk,c);
978 if (i < 0)
979 {
980 /* we did not say we would use this cipher */
981 al=SSL_AD_ILLEGAL_PARAMETER;
982 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
983 goto f_err;
984 }
985
986 /* Depending on the session caching (internal/external), the cipher
987 and/or cipher_id values may not be set. Make sure that
988 cipher_id is set and use it for comparison. */
989 if (s->session->cipher)
990 s->session->cipher_id = s->session->cipher->id;
991 if (s->hit && (s->session->cipher_id != c->id))
992 {
993 /* Workaround is now obsolete */
994 #if 0
995 if (!(s->options &
996 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
997 #endif
998 {
999 al=SSL_AD_ILLEGAL_PARAMETER;
1000 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1001 goto f_err;
1002 }
1003 }
1004 s->s3->tmp.new_cipher=c;
1005 /* Don't digest cached records if TLS v1.2: we may need them for
1006 * client authentication.
1007 */
1008 if (TLS1_get_version(s) < TLS1_2_VERSION && !ssl3_digest_cached_records(s))
1009 goto f_err;
1010 /* lets get the compression algorithm */
1011 /* COMPRESSION */
1012 #ifdef OPENSSL_NO_COMP
1013 if (*(p++) != 0)
1014 {
1015 al=SSL_AD_ILLEGAL_PARAMETER;
1016 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1017 goto f_err;
1018 }
1019 /* If compression is disabled we'd better not try to resume a session
1020 * using compression.
1021 */
1022 if (s->session->compress_meth != 0)
1023 {
1024 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1025 goto f_err;
1026 }
1027 #else
1028 j= *(p++);
1029 if (s->hit && j != s->session->compress_meth)
1030 {
1031 al=SSL_AD_ILLEGAL_PARAMETER;
1032 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1033 goto f_err;
1034 }
1035 if (j == 0)
1036 comp=NULL;
1037 else if (s->options & SSL_OP_NO_COMPRESSION)
1038 {
1039 al=SSL_AD_ILLEGAL_PARAMETER;
1040 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1041 goto f_err;
1042 }
1043 else
1044 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1045
1046 if ((j != 0) && (comp == NULL))
1047 {
1048 al=SSL_AD_ILLEGAL_PARAMETER;
1049 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1050 goto f_err;
1051 }
1052 else
1053 {
1054 s->s3->tmp.new_compression=comp;
1055 }
1056 #endif
1057
1058 #ifndef OPENSSL_NO_TLSEXT
1059 /* TLS extensions*/
1060 if (!ssl_parse_serverhello_tlsext(s,&p,d,n))
1061 {
1062 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1063 goto err;
1064 }
1065 #endif
1066
1067 if (p != (d+n))
1068 {
1069 /* wrong packet length */
1070 al=SSL_AD_DECODE_ERROR;
1071 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1072 goto f_err;
1073 }
1074
1075 return(1);
1076 f_err:
1077 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1078 err:
1079 return(-1);
1080 }
1081
1082 int ssl3_get_server_certificate(SSL *s)
1083 {
1084 int al,i,ok,ret= -1;
1085 unsigned long n,nc,llen,l;
1086 X509 *x=NULL;
1087 const unsigned char *q,*p;
1088 unsigned char *d;
1089 STACK_OF(X509) *sk=NULL;
1090 SESS_CERT *sc;
1091 EVP_PKEY *pkey=NULL;
1092 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1093
1094 n=s->method->ssl_get_message(s,
1095 SSL3_ST_CR_CERT_A,
1096 SSL3_ST_CR_CERT_B,
1097 -1,
1098 s->max_cert_list,
1099 &ok);
1100
1101 if (!ok) return((int)n);
1102
1103 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1104 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1105 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1106 {
1107 s->s3->tmp.reuse_message=1;
1108 return(1);
1109 }
1110
1111 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1112 {
1113 al=SSL_AD_UNEXPECTED_MESSAGE;
1114 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1115 goto f_err;
1116 }
1117 p=d=(unsigned char *)s->init_msg;
1118
1119 if ((sk=sk_X509_new_null()) == NULL)
1120 {
1121 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1122 goto err;
1123 }
1124
1125 n2l3(p,llen);
1126 if (llen+3 != n)
1127 {
1128 al=SSL_AD_DECODE_ERROR;
1129 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1130 goto f_err;
1131 }
1132 for (nc=0; nc<llen; )
1133 {
1134 n2l3(p,l);
1135 if ((l+nc+3) > llen)
1136 {
1137 al=SSL_AD_DECODE_ERROR;
1138 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1139 goto f_err;
1140 }
1141
1142 q=p;
1143 x=d2i_X509(NULL,&q,l);
1144 if (x == NULL)
1145 {
1146 al=SSL_AD_BAD_CERTIFICATE;
1147 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1148 goto f_err;
1149 }
1150 if (q != (p+l))
1151 {
1152 al=SSL_AD_DECODE_ERROR;
1153 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1154 goto f_err;
1155 }
1156 if (!sk_X509_push(sk,x))
1157 {
1158 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1159 goto err;
1160 }
1161 x=NULL;
1162 nc+=l+3;
1163 p=q;
1164 }
1165
1166 i=ssl_verify_cert_chain(s,sk);
1167 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1168 #ifndef OPENSSL_NO_KRB5
1169 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1170 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1171 #endif /* OPENSSL_NO_KRB5 */
1172 )
1173 {
1174 al=ssl_verify_alarm_type(s->verify_result);
1175 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1176 goto f_err;
1177 }
1178 ERR_clear_error(); /* but we keep s->verify_result */
1179
1180 sc=ssl_sess_cert_new();
1181 if (sc == NULL) goto err;
1182
1183 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1184 s->session->sess_cert=sc;
1185
1186 sc->cert_chain=sk;
1187 /* Inconsistency alert: cert_chain does include the peer's
1188 * certificate, which we don't include in s3_srvr.c */
1189 x=sk_X509_value(sk,0);
1190 sk=NULL;
1191 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1192
1193 pkey=X509_get_pubkey(x);
1194
1195 /* VRS: allow null cert if auth == KRB5 */
1196 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1197 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1198 ? 0 : 1;
1199
1200 #ifdef KSSL_DEBUG
1201 printf("pkey,x = %p, %p\n", pkey,x);
1202 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1203 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1204 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1205 #endif /* KSSL_DEBUG */
1206
1207 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1208 {
1209 x=NULL;
1210 al=SSL3_AL_FATAL;
1211 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1212 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1213 goto f_err;
1214 }
1215
1216 i=ssl_cert_type(x,pkey);
1217 if (need_cert && i < 0)
1218 {
1219 x=NULL;
1220 al=SSL3_AL_FATAL;
1221 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1222 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1223 goto f_err;
1224 }
1225
1226 if (need_cert)
1227 {
1228 sc->peer_cert_type=i;
1229 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1230 /* Why would the following ever happen?
1231 * We just created sc a couple of lines ago. */
1232 if (sc->peer_pkeys[i].x509 != NULL)
1233 X509_free(sc->peer_pkeys[i].x509);
1234 sc->peer_pkeys[i].x509=x;
1235 sc->peer_key= &(sc->peer_pkeys[i]);
1236
1237 if (s->session->peer != NULL)
1238 X509_free(s->session->peer);
1239 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1240 s->session->peer=x;
1241 }
1242 else
1243 {
1244 sc->peer_cert_type=i;
1245 sc->peer_key= NULL;
1246
1247 if (s->session->peer != NULL)
1248 X509_free(s->session->peer);
1249 s->session->peer=NULL;
1250 }
1251 s->session->verify_result = s->verify_result;
1252
1253 x=NULL;
1254 #ifndef OPENSSL_NO_TLSEXT
1255 /* Check the audit proof. */
1256 if (s->ctx->tlsext_authz_server_audit_proof_cb)
1257 {
1258 ret = s->ctx->tlsext_authz_server_audit_proof_cb(s,
1259 s->ctx->tlsext_authz_server_audit_proof_cb_arg);
1260 if (ret <= 0)
1261 {
1262 al = SSL_AD_BAD_CERTIFICATE;
1263 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_INVALID_AUDIT_PROOF);
1264 goto f_err;
1265 }
1266 }
1267
1268 #endif
1269 ret=1;
1270 if (0)
1271 {
1272 f_err:
1273 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1274 }
1275 err:
1276 EVP_PKEY_free(pkey);
1277 X509_free(x);
1278 sk_X509_pop_free(sk,X509_free);
1279 return(ret);
1280 }
1281
1282 int ssl3_get_key_exchange(SSL *s)
1283 {
1284 #ifndef OPENSSL_NO_RSA
1285 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1286 #endif
1287 EVP_MD_CTX md_ctx;
1288 unsigned char *param,*p;
1289 int al,i,j,param_len,ok;
1290 long n,alg_k,alg_a;
1291 EVP_PKEY *pkey=NULL;
1292 const EVP_MD *md = NULL;
1293 #ifndef OPENSSL_NO_RSA
1294 RSA *rsa=NULL;
1295 #endif
1296 #ifndef OPENSSL_NO_DH
1297 DH *dh=NULL;
1298 #endif
1299 #ifndef OPENSSL_NO_ECDH
1300 EC_KEY *ecdh = NULL;
1301 BN_CTX *bn_ctx = NULL;
1302 EC_POINT *srvr_ecpoint = NULL;
1303 int curve_nid = 0;
1304 int encoded_pt_len = 0;
1305 #endif
1306
1307 /* use same message size as in ssl3_get_certificate_request()
1308 * as ServerKeyExchange message may be skipped */
1309 n=s->method->ssl_get_message(s,
1310 SSL3_ST_CR_KEY_EXCH_A,
1311 SSL3_ST_CR_KEY_EXCH_B,
1312 -1,
1313 s->max_cert_list,
1314 &ok);
1315 if (!ok) return((int)n);
1316
1317 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1318 {
1319 #ifndef OPENSSL_NO_PSK
1320 /* In plain PSK ciphersuite, ServerKeyExchange can be
1321 omitted if no identity hint is sent. Set
1322 session->sess_cert anyway to avoid problems
1323 later.*/
1324 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1325 {
1326 s->session->sess_cert=ssl_sess_cert_new();
1327 if (s->ctx->psk_identity_hint)
1328 OPENSSL_free(s->ctx->psk_identity_hint);
1329 s->ctx->psk_identity_hint = NULL;
1330 }
1331 #endif
1332 s->s3->tmp.reuse_message=1;
1333 return(1);
1334 }
1335
1336 param=p=(unsigned char *)s->init_msg;
1337 if (s->session->sess_cert != NULL)
1338 {
1339 #ifndef OPENSSL_NO_RSA
1340 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1341 {
1342 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1343 s->session->sess_cert->peer_rsa_tmp=NULL;
1344 }
1345 #endif
1346 #ifndef OPENSSL_NO_DH
1347 if (s->session->sess_cert->peer_dh_tmp)
1348 {
1349 DH_free(s->session->sess_cert->peer_dh_tmp);
1350 s->session->sess_cert->peer_dh_tmp=NULL;
1351 }
1352 #endif
1353 #ifndef OPENSSL_NO_ECDH
1354 if (s->session->sess_cert->peer_ecdh_tmp)
1355 {
1356 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1357 s->session->sess_cert->peer_ecdh_tmp=NULL;
1358 }
1359 #endif
1360 }
1361 else
1362 {
1363 s->session->sess_cert=ssl_sess_cert_new();
1364 }
1365
1366 param_len=0;
1367 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1368 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1369 EVP_MD_CTX_init(&md_ctx);
1370
1371 #ifndef OPENSSL_NO_PSK
1372 if (alg_k & SSL_kPSK)
1373 {
1374 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1375
1376 al=SSL_AD_HANDSHAKE_FAILURE;
1377 n2s(p,i);
1378 param_len=i+2;
1379 /* Store PSK identity hint for later use, hint is used
1380 * in ssl3_send_client_key_exchange. Assume that the
1381 * maximum length of a PSK identity hint can be as
1382 * long as the maximum length of a PSK identity. */
1383 if (i > PSK_MAX_IDENTITY_LEN)
1384 {
1385 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1386 SSL_R_DATA_LENGTH_TOO_LONG);
1387 goto f_err;
1388 }
1389 if (param_len > n)
1390 {
1391 al=SSL_AD_DECODE_ERROR;
1392 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1393 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1394 goto f_err;
1395 }
1396 /* If received PSK identity hint contains NULL
1397 * characters, the hint is truncated from the first
1398 * NULL. p may not be ending with NULL, so create a
1399 * NULL-terminated string. */
1400 memcpy(tmp_id_hint, p, i);
1401 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1402 if (s->ctx->psk_identity_hint != NULL)
1403 OPENSSL_free(s->ctx->psk_identity_hint);
1404 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1405 if (s->ctx->psk_identity_hint == NULL)
1406 {
1407 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1408 goto f_err;
1409 }
1410
1411 p+=i;
1412 n-=param_len;
1413 }
1414 else
1415 #endif /* !OPENSSL_NO_PSK */
1416 #ifndef OPENSSL_NO_SRP
1417 if (alg_k & SSL_kSRP)
1418 {
1419 n2s(p,i);
1420 param_len=i+2;
1421 if (param_len > n)
1422 {
1423 al=SSL_AD_DECODE_ERROR;
1424 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1425 goto f_err;
1426 }
1427 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1428 {
1429 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1430 goto err;
1431 }
1432 p+=i;
1433
1434 n2s(p,i);
1435 param_len+=i+2;
1436 if (param_len > n)
1437 {
1438 al=SSL_AD_DECODE_ERROR;
1439 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1440 goto f_err;
1441 }
1442 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1443 {
1444 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1445 goto err;
1446 }
1447 p+=i;
1448
1449 i = (unsigned int)(p[0]);
1450 p++;
1451 param_len+=i+1;
1452 if (param_len > n)
1453 {
1454 al=SSL_AD_DECODE_ERROR;
1455 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1456 goto f_err;
1457 }
1458 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1459 {
1460 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1461 goto err;
1462 }
1463 p+=i;
1464
1465 n2s(p,i);
1466 param_len+=i+2;
1467 if (param_len > n)
1468 {
1469 al=SSL_AD_DECODE_ERROR;
1470 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1471 goto f_err;
1472 }
1473 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1474 {
1475 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1476 goto err;
1477 }
1478 p+=i;
1479 n-=param_len;
1480
1481 /* We must check if there is a certificate */
1482 #ifndef OPENSSL_NO_RSA
1483 if (alg_a & SSL_aRSA)
1484 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1485 #else
1486 if (0)
1487 ;
1488 #endif
1489 #ifndef OPENSSL_NO_DSA
1490 else if (alg_a & SSL_aDSS)
1491 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1492 #endif
1493 }
1494 else
1495 #endif /* !OPENSSL_NO_SRP */
1496 #ifndef OPENSSL_NO_RSA
1497 if (alg_k & SSL_kRSA)
1498 {
1499 if ((rsa=RSA_new()) == NULL)
1500 {
1501 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1502 goto err;
1503 }
1504 n2s(p,i);
1505 param_len=i+2;
1506 if (param_len > n)
1507 {
1508 al=SSL_AD_DECODE_ERROR;
1509 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1510 goto f_err;
1511 }
1512 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1513 {
1514 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1515 goto err;
1516 }
1517 p+=i;
1518
1519 n2s(p,i);
1520 param_len+=i+2;
1521 if (param_len > n)
1522 {
1523 al=SSL_AD_DECODE_ERROR;
1524 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1525 goto f_err;
1526 }
1527 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1528 {
1529 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1530 goto err;
1531 }
1532 p+=i;
1533 n-=param_len;
1534
1535 /* this should be because we are using an export cipher */
1536 if (alg_a & SSL_aRSA)
1537 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1538 else
1539 {
1540 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1541 goto err;
1542 }
1543 s->session->sess_cert->peer_rsa_tmp=rsa;
1544 rsa=NULL;
1545 }
1546 #else /* OPENSSL_NO_RSA */
1547 if (0)
1548 ;
1549 #endif
1550 #ifndef OPENSSL_NO_DH
1551 else if (alg_k & SSL_kEDH)
1552 {
1553 if ((dh=DH_new()) == NULL)
1554 {
1555 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1556 goto err;
1557 }
1558 n2s(p,i);
1559 param_len=i+2;
1560 if (param_len > n)
1561 {
1562 al=SSL_AD_DECODE_ERROR;
1563 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1564 goto f_err;
1565 }
1566 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1567 {
1568 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1569 goto err;
1570 }
1571 p+=i;
1572
1573 n2s(p,i);
1574 param_len+=i+2;
1575 if (param_len > n)
1576 {
1577 al=SSL_AD_DECODE_ERROR;
1578 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1579 goto f_err;
1580 }
1581 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1582 {
1583 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1584 goto err;
1585 }
1586 p+=i;
1587
1588 n2s(p,i);
1589 param_len+=i+2;
1590 if (param_len > n)
1591 {
1592 al=SSL_AD_DECODE_ERROR;
1593 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1594 goto f_err;
1595 }
1596 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1597 {
1598 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1599 goto err;
1600 }
1601 p+=i;
1602 n-=param_len;
1603
1604 #ifndef OPENSSL_NO_RSA
1605 if (alg_a & SSL_aRSA)
1606 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1607 #else
1608 if (0)
1609 ;
1610 #endif
1611 #ifndef OPENSSL_NO_DSA
1612 else if (alg_a & SSL_aDSS)
1613 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1614 #endif
1615 /* else anonymous DH, so no certificate or pkey. */
1616
1617 s->session->sess_cert->peer_dh_tmp=dh;
1618 dh=NULL;
1619 }
1620 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1621 {
1622 al=SSL_AD_ILLEGAL_PARAMETER;
1623 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1624 goto f_err;
1625 }
1626 #endif /* !OPENSSL_NO_DH */
1627
1628 #ifndef OPENSSL_NO_ECDH
1629 else if (alg_k & SSL_kEECDH)
1630 {
1631 EC_GROUP *ngroup;
1632 const EC_GROUP *group;
1633
1634 if ((ecdh=EC_KEY_new()) == NULL)
1635 {
1636 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1637 goto err;
1638 }
1639
1640 /* Extract elliptic curve parameters and the
1641 * server's ephemeral ECDH public key.
1642 * Keep accumulating lengths of various components in
1643 * param_len and make sure it never exceeds n.
1644 */
1645
1646 /* XXX: For now we only support named (not generic) curves
1647 * and the ECParameters in this case is just three bytes.
1648 */
1649 param_len=3;
1650 /* Check curve is one of our prefrences, if not server has
1651 * sent an invalid curve.
1652 */
1653 if (!tls1_check_curve(s, p, param_len))
1654 {
1655 al=SSL_AD_DECODE_ERROR;
1656 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_CURVE);
1657 goto f_err;
1658 }
1659
1660 if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)
1661 {
1662 al=SSL_AD_INTERNAL_ERROR;
1663 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1664 goto f_err;
1665 }
1666
1667 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1668 if (ngroup == NULL)
1669 {
1670 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1671 goto err;
1672 }
1673 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1674 {
1675 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1676 goto err;
1677 }
1678 EC_GROUP_free(ngroup);
1679
1680 group = EC_KEY_get0_group(ecdh);
1681
1682 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1683 (EC_GROUP_get_degree(group) > 163))
1684 {
1685 al=SSL_AD_EXPORT_RESTRICTION;
1686 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1687 goto f_err;
1688 }
1689
1690 p+=3;
1691
1692 /* Next, get the encoded ECPoint */
1693 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1694 ((bn_ctx = BN_CTX_new()) == NULL))
1695 {
1696 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1697 goto err;
1698 }
1699
1700 encoded_pt_len = *p; /* length of encoded point */
1701 p+=1;
1702 param_len += (1 + encoded_pt_len);
1703 if ((param_len > n) ||
1704 (EC_POINT_oct2point(group, srvr_ecpoint,
1705 p, encoded_pt_len, bn_ctx) == 0))
1706 {
1707 al=SSL_AD_DECODE_ERROR;
1708 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1709 goto f_err;
1710 }
1711
1712 n-=param_len;
1713 p+=encoded_pt_len;
1714
1715 /* The ECC/TLS specification does not mention
1716 * the use of DSA to sign ECParameters in the server
1717 * key exchange message. We do support RSA and ECDSA.
1718 */
1719 if (0) ;
1720 #ifndef OPENSSL_NO_RSA
1721 else if (alg_a & SSL_aRSA)
1722 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1723 #endif
1724 #ifndef OPENSSL_NO_ECDSA
1725 else if (alg_a & SSL_aECDSA)
1726 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1727 #endif
1728 /* else anonymous ECDH, so no certificate or pkey. */
1729 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1730 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1731 ecdh=NULL;
1732 BN_CTX_free(bn_ctx);
1733 bn_ctx = NULL;
1734 EC_POINT_free(srvr_ecpoint);
1735 srvr_ecpoint = NULL;
1736 }
1737 else if (alg_k)
1738 {
1739 al=SSL_AD_UNEXPECTED_MESSAGE;
1740 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1741 goto f_err;
1742 }
1743 #endif /* !OPENSSL_NO_ECDH */
1744
1745
1746 /* p points to the next byte, there are 'n' bytes left */
1747
1748 /* if it was signed, check the signature */
1749 if (pkey != NULL)
1750 {
1751 if (TLS1_get_version(s) >= TLS1_2_VERSION)
1752 {
1753 int rv = tls12_check_peer_sigalg(&md, s, p, pkey);
1754 if (rv == -1)
1755 goto err;
1756 else if (rv == 0)
1757 {
1758 al = SSL_AD_DECODE_ERROR;
1759 goto f_err;
1760 }
1761 #ifdef SSL_DEBUG
1762 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1763 #endif
1764 p += 2;
1765 n -= 2;
1766 }
1767 else
1768 md = EVP_sha1();
1769
1770 n2s(p,i);
1771 n-=2;
1772 j=EVP_PKEY_size(pkey);
1773
1774 if ((i != n) || (n > j) || (n <= 0))
1775 {
1776 /* wrong packet length */
1777 al=SSL_AD_DECODE_ERROR;
1778 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1779 goto f_err;
1780 }
1781
1782 #ifndef OPENSSL_NO_RSA
1783 if (pkey->type == EVP_PKEY_RSA && TLS1_get_version(s) < TLS1_2_VERSION)
1784 {
1785 int num;
1786
1787 j=0;
1788 q=md_buf;
1789 for (num=2; num > 0; num--)
1790 {
1791 EVP_MD_CTX_set_flags(&md_ctx,
1792 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1793 EVP_DigestInit_ex(&md_ctx,(num == 2)
1794 ?s->ctx->md5:s->ctx->sha1, NULL);
1795 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1796 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1797 EVP_DigestUpdate(&md_ctx,param,param_len);
1798 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1799 q+=i;
1800 j+=i;
1801 }
1802 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1803 pkey->pkey.rsa);
1804 if (i < 0)
1805 {
1806 al=SSL_AD_DECRYPT_ERROR;
1807 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1808 goto f_err;
1809 }
1810 if (i == 0)
1811 {
1812 /* bad signature */
1813 al=SSL_AD_DECRYPT_ERROR;
1814 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1815 goto f_err;
1816 }
1817 }
1818 else
1819 #endif
1820 {
1821 EVP_VerifyInit_ex(&md_ctx, md, NULL);
1822 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1823 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1824 EVP_VerifyUpdate(&md_ctx,param,param_len);
1825 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1826 {
1827 /* bad signature */
1828 al=SSL_AD_DECRYPT_ERROR;
1829 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1830 goto f_err;
1831 }
1832 }
1833 }
1834 else
1835 {
1836 /* aNULL or kPSK do not need public keys */
1837 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
1838 {
1839 /* Might be wrong key type, check it */
1840 if (ssl3_check_cert_and_algorithm(s))
1841 /* Otherwise this shouldn't happen */
1842 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1843 goto err;
1844 }
1845 /* still data left over */
1846 if (n != 0)
1847 {
1848 al=SSL_AD_DECODE_ERROR;
1849 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1850 goto f_err;
1851 }
1852 }
1853 EVP_PKEY_free(pkey);
1854 EVP_MD_CTX_cleanup(&md_ctx);
1855 return(1);
1856 f_err:
1857 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1858 err:
1859 EVP_PKEY_free(pkey);
1860 #ifndef OPENSSL_NO_RSA
1861 if (rsa != NULL)
1862 RSA_free(rsa);
1863 #endif
1864 #ifndef OPENSSL_NO_DH
1865 if (dh != NULL)
1866 DH_free(dh);
1867 #endif
1868 #ifndef OPENSSL_NO_ECDH
1869 BN_CTX_free(bn_ctx);
1870 EC_POINT_free(srvr_ecpoint);
1871 if (ecdh != NULL)
1872 EC_KEY_free(ecdh);
1873 #endif
1874 EVP_MD_CTX_cleanup(&md_ctx);
1875 return(-1);
1876 }
1877
1878 int ssl3_get_certificate_request(SSL *s)
1879 {
1880 int ok,ret=0;
1881 unsigned long n,nc,l;
1882 unsigned int llen, ctype_num,i;
1883 X509_NAME *xn=NULL;
1884 const unsigned char *p,*q;
1885 unsigned char *d;
1886 STACK_OF(X509_NAME) *ca_sk=NULL;
1887
1888 n=s->method->ssl_get_message(s,
1889 SSL3_ST_CR_CERT_REQ_A,
1890 SSL3_ST_CR_CERT_REQ_B,
1891 -1,
1892 s->max_cert_list,
1893 &ok);
1894
1895 if (!ok) return((int)n);
1896
1897 s->s3->tmp.cert_req=0;
1898
1899 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1900 {
1901 s->s3->tmp.reuse_message=1;
1902 /* If we get here we don't need any cached handshake records
1903 * as we wont be doing client auth.
1904 */
1905 if (s->s3->handshake_buffer)
1906 {
1907 if (!ssl3_digest_cached_records(s))
1908 goto err;
1909 }
1910 return(1);
1911 }
1912
1913 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1914 {
1915 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1916 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1917 goto err;
1918 }
1919
1920 /* TLS does not like anon-DH with client cert */
1921 if (s->version > SSL3_VERSION)
1922 {
1923 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
1924 {
1925 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1926 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1927 goto err;
1928 }
1929 }
1930
1931 p=d=(unsigned char *)s->init_msg;
1932
1933 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1934 {
1935 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1936 goto err;
1937 }
1938
1939 /* get the certificate types */
1940 ctype_num= *(p++);
1941 if (s->cert->ctypes)
1942 {
1943 OPENSSL_free(s->cert->ctypes);
1944 s->cert->ctypes = NULL;
1945 }
1946 if (ctype_num > SSL3_CT_NUMBER)
1947 {
1948 /* If we exceed static buffer copy all to cert structure */
1949 s->cert->ctypes = OPENSSL_malloc(ctype_num);
1950 memcpy(s->cert->ctypes, p, ctype_num);
1951 s->cert->ctype_num = (size_t)ctype_num;
1952 ctype_num=SSL3_CT_NUMBER;
1953 }
1954 for (i=0; i<ctype_num; i++)
1955 s->s3->tmp.ctype[i]= p[i];
1956 p+=p[-1];
1957 if (TLS1_get_version(s) >= TLS1_2_VERSION)
1958 {
1959 n2s(p, llen);
1960 /* Check we have enough room for signature algorithms and
1961 * following length value.
1962 */
1963 if ((unsigned long)(p - d + llen + 2) > n)
1964 {
1965 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1966 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
1967 goto err;
1968 }
1969 /* Clear certificate digests and validity flags */
1970 for (i = 0; i < SSL_PKEY_NUM; i++)
1971 {
1972 s->cert->pkeys[i].digest = NULL;
1973 s->cert->pkeys[i].valid_flags = 0;
1974 }
1975 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen))
1976 {
1977 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1978 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
1979 goto err;
1980 }
1981 p += llen;
1982 }
1983
1984 /* get the CA RDNs */
1985 n2s(p,llen);
1986 #if 0
1987 {
1988 FILE *out;
1989 out=fopen("/tmp/vsign.der","w");
1990 fwrite(p,1,llen,out);
1991 fclose(out);
1992 }
1993 #endif
1994
1995 if ((unsigned long)(p - d + llen) != n)
1996 {
1997 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1998 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1999 goto err;
2000 }
2001
2002 for (nc=0; nc<llen; )
2003 {
2004 n2s(p,l);
2005 if ((l+nc+2) > llen)
2006 {
2007 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
2008 goto cont; /* netscape bugs */
2009 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2010 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
2011 goto err;
2012 }
2013
2014 q=p;
2015
2016 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
2017 {
2018 /* If netscape tolerance is on, ignore errors */
2019 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
2020 goto cont;
2021 else
2022 {
2023 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2024 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
2025 goto err;
2026 }
2027 }
2028
2029 if (q != (p+l))
2030 {
2031 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2032 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
2033 goto err;
2034 }
2035 if (!sk_X509_NAME_push(ca_sk,xn))
2036 {
2037 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2038 goto err;
2039 }
2040
2041 p+=l;
2042 nc+=l+2;
2043 }
2044
2045 if (0)
2046 {
2047 cont:
2048 ERR_clear_error();
2049 }
2050
2051 /* we should setup a certificate to return.... */
2052 s->s3->tmp.cert_req=1;
2053 s->s3->tmp.ctype_num=ctype_num;
2054 if (s->s3->tmp.ca_names != NULL)
2055 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2056 s->s3->tmp.ca_names=ca_sk;
2057 ca_sk=NULL;
2058
2059 ret=1;
2060 err:
2061 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2062 return(ret);
2063 }
2064
2065 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2066 {
2067 return(X509_NAME_cmp(*a,*b));
2068 }
2069 #ifndef OPENSSL_NO_TLSEXT
2070 int ssl3_get_new_session_ticket(SSL *s)
2071 {
2072 int ok,al,ret=0, ticklen;
2073 long n;
2074 const unsigned char *p;
2075 unsigned char *d;
2076
2077 n=s->method->ssl_get_message(s,
2078 SSL3_ST_CR_SESSION_TICKET_A,
2079 SSL3_ST_CR_SESSION_TICKET_B,
2080 -1,
2081 16384,
2082 &ok);
2083
2084 if (!ok)
2085 return((int)n);
2086
2087 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
2088 {
2089 s->s3->tmp.reuse_message=1;
2090 return(1);
2091 }
2092 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
2093 {
2094 al=SSL_AD_UNEXPECTED_MESSAGE;
2095 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2096 goto f_err;
2097 }
2098 if (n < 6)
2099 {
2100 /* need at least ticket_lifetime_hint + ticket length */
2101 al = SSL_AD_DECODE_ERROR;
2102 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2103 goto f_err;
2104 }
2105
2106 p=d=(unsigned char *)s->init_msg;
2107 n2l(p, s->session->tlsext_tick_lifetime_hint);
2108 n2s(p, ticklen);
2109 /* ticket_lifetime_hint + ticket_length + ticket */
2110 if (ticklen + 6 != n)
2111 {
2112 al = SSL_AD_DECODE_ERROR;
2113 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2114 goto f_err;
2115 }
2116 if (s->session->tlsext_tick)
2117 {
2118 OPENSSL_free(s->session->tlsext_tick);
2119 s->session->tlsext_ticklen = 0;
2120 }
2121 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2122 if (!s->session->tlsext_tick)
2123 {
2124 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2125 goto err;
2126 }
2127 memcpy(s->session->tlsext_tick, p, ticklen);
2128 s->session->tlsext_ticklen = ticklen;
2129 /* There are two ways to detect a resumed ticket sesion.
2130 * One is to set an appropriate session ID and then the server
2131 * must return a match in ServerHello. This allows the normal
2132 * client session ID matching to work and we know much
2133 * earlier that the ticket has been accepted.
2134 *
2135 * The other way is to set zero length session ID when the
2136 * ticket is presented and rely on the handshake to determine
2137 * session resumption.
2138 *
2139 * We choose the former approach because this fits in with
2140 * assumptions elsewhere in OpenSSL. The session ID is set
2141 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2142 * ticket.
2143 */
2144 EVP_Digest(p, ticklen,
2145 s->session->session_id, &s->session->session_id_length,
2146 #ifndef OPENSSL_NO_SHA256
2147 EVP_sha256(), NULL);
2148 #else
2149 EVP_sha1(), NULL);
2150 #endif
2151 ret=1;
2152 return(ret);
2153 f_err:
2154 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2155 err:
2156 return(-1);
2157 }
2158
2159 int ssl3_get_cert_status(SSL *s)
2160 {
2161 int ok, al;
2162 unsigned long resplen,n;
2163 const unsigned char *p;
2164
2165 n=s->method->ssl_get_message(s,
2166 SSL3_ST_CR_CERT_STATUS_A,
2167 SSL3_ST_CR_CERT_STATUS_B,
2168 SSL3_MT_CERTIFICATE_STATUS,
2169 16384,
2170 &ok);
2171
2172 if (!ok) return((int)n);
2173 if (n < 4)
2174 {
2175 /* need at least status type + length */
2176 al = SSL_AD_DECODE_ERROR;
2177 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2178 goto f_err;
2179 }
2180 p = (unsigned char *)s->init_msg;
2181 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2182 {
2183 al = SSL_AD_DECODE_ERROR;
2184 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2185 goto f_err;
2186 }
2187 n2l3(p, resplen);
2188 if (resplen + 4 != n)
2189 {
2190 al = SSL_AD_DECODE_ERROR;
2191 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2192 goto f_err;
2193 }
2194 if (s->tlsext_ocsp_resp)
2195 OPENSSL_free(s->tlsext_ocsp_resp);
2196 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2197 if (!s->tlsext_ocsp_resp)
2198 {
2199 al = SSL_AD_INTERNAL_ERROR;
2200 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2201 goto f_err;
2202 }
2203 s->tlsext_ocsp_resplen = resplen;
2204 if (s->ctx->tlsext_status_cb)
2205 {
2206 int ret;
2207 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2208 if (ret == 0)
2209 {
2210 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2211 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2212 goto f_err;
2213 }
2214 if (ret < 0)
2215 {
2216 al = SSL_AD_INTERNAL_ERROR;
2217 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2218 goto f_err;
2219 }
2220 }
2221 return 1;
2222 f_err:
2223 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2224 return(-1);
2225 }
2226 #endif
2227
2228 int ssl3_get_server_done(SSL *s)
2229 {
2230 int ok,ret=0;
2231 long n;
2232
2233 n=s->method->ssl_get_message(s,
2234 SSL3_ST_CR_SRVR_DONE_A,
2235 SSL3_ST_CR_SRVR_DONE_B,
2236 SSL3_MT_SERVER_DONE,
2237 30, /* should be very small, like 0 :-) */
2238 &ok);
2239
2240 if (!ok) return((int)n);
2241 if (n > 0)
2242 {
2243 /* should contain no data */
2244 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2245 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2246 return -1;
2247 }
2248 ret=1;
2249 return(ret);
2250 }
2251
2252
2253 int ssl3_send_client_key_exchange(SSL *s)
2254 {
2255 unsigned char *p,*d;
2256 int n;
2257 unsigned long alg_k;
2258 #ifndef OPENSSL_NO_RSA
2259 unsigned char *q;
2260 EVP_PKEY *pkey=NULL;
2261 #endif
2262 #ifndef OPENSSL_NO_KRB5
2263 KSSL_ERR kssl_err;
2264 #endif /* OPENSSL_NO_KRB5 */
2265 #ifndef OPENSSL_NO_ECDH
2266 EC_KEY *clnt_ecdh = NULL;
2267 const EC_POINT *srvr_ecpoint = NULL;
2268 EVP_PKEY *srvr_pub_pkey = NULL;
2269 unsigned char *encodedPoint = NULL;
2270 int encoded_pt_len = 0;
2271 BN_CTX * bn_ctx = NULL;
2272 #endif
2273
2274 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2275 {
2276 d=(unsigned char *)s->init_buf->data;
2277 p= &(d[4]);
2278
2279 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2280
2281 /* Fool emacs indentation */
2282 if (0) {}
2283 #ifndef OPENSSL_NO_RSA
2284 else if (alg_k & SSL_kRSA)
2285 {
2286 RSA *rsa;
2287 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2288
2289 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2290 rsa=s->session->sess_cert->peer_rsa_tmp;
2291 else
2292 {
2293 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2294 if ((pkey == NULL) ||
2295 (pkey->type != EVP_PKEY_RSA) ||
2296 (pkey->pkey.rsa == NULL))
2297 {
2298 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2299 goto err;
2300 }
2301 rsa=pkey->pkey.rsa;
2302 EVP_PKEY_free(pkey);
2303 }
2304
2305 tmp_buf[0]=s->client_version>>8;
2306 tmp_buf[1]=s->client_version&0xff;
2307 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2308 goto err;
2309
2310 s->session->master_key_length=sizeof tmp_buf;
2311
2312 q=p;
2313 /* Fix buf for TLS and beyond */
2314 if (s->version > SSL3_VERSION)
2315 p+=2;
2316 n=RSA_public_encrypt(sizeof tmp_buf,
2317 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2318 #ifdef PKCS1_CHECK
2319 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2320 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2321 #endif
2322 if (n <= 0)
2323 {
2324 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2325 goto err;
2326 }
2327
2328 /* Fix buf for TLS and beyond */
2329 if (s->version > SSL3_VERSION)
2330 {
2331 s2n(n,q);
2332 n+=2;
2333 }
2334
2335 s->session->master_key_length=
2336 s->method->ssl3_enc->generate_master_secret(s,
2337 s->session->master_key,
2338 tmp_buf,sizeof tmp_buf);
2339 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2340 }
2341 #endif
2342 #ifndef OPENSSL_NO_KRB5
2343 else if (alg_k & SSL_kKRB5)
2344 {
2345 krb5_error_code krb5rc;
2346 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2347 /* krb5_data krb5_ap_req; */
2348 krb5_data *enc_ticket;
2349 krb5_data authenticator, *authp = NULL;
2350 EVP_CIPHER_CTX ciph_ctx;
2351 const EVP_CIPHER *enc = NULL;
2352 unsigned char iv[EVP_MAX_IV_LENGTH];
2353 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2354 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2355 + EVP_MAX_IV_LENGTH];
2356 int padl, outl = sizeof(epms);
2357
2358 EVP_CIPHER_CTX_init(&ciph_ctx);
2359
2360 #ifdef KSSL_DEBUG
2361 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2362 alg_k, SSL_kKRB5);
2363 #endif /* KSSL_DEBUG */
2364
2365 authp = NULL;
2366 #ifdef KRB5SENDAUTH
2367 if (KRB5SENDAUTH) authp = &authenticator;
2368 #endif /* KRB5SENDAUTH */
2369
2370 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2371 &kssl_err);
2372 enc = kssl_map_enc(kssl_ctx->enctype);
2373 if (enc == NULL)
2374 goto err;
2375 #ifdef KSSL_DEBUG
2376 {
2377 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2378 if (krb5rc && kssl_err.text)
2379 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2380 }
2381 #endif /* KSSL_DEBUG */
2382
2383 if (krb5rc)
2384 {
2385 ssl3_send_alert(s,SSL3_AL_FATAL,
2386 SSL_AD_HANDSHAKE_FAILURE);
2387 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2388 kssl_err.reason);
2389 goto err;
2390 }
2391
2392 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2393 ** in place of RFC 2712 KerberosWrapper, as in:
2394 **
2395 ** Send ticket (copy to *p, set n = length)
2396 ** n = krb5_ap_req.length;
2397 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2398 ** if (krb5_ap_req.data)
2399 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2400 **
2401 ** Now using real RFC 2712 KerberosWrapper
2402 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2403 ** Note: 2712 "opaque" types are here replaced
2404 ** with a 2-byte length followed by the value.
2405 ** Example:
2406 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2407 ** Where "xx xx" = length bytes. Shown here with
2408 ** optional authenticator omitted.
2409 */
2410
2411 /* KerberosWrapper.Ticket */
2412 s2n(enc_ticket->length,p);
2413 memcpy(p, enc_ticket->data, enc_ticket->length);
2414 p+= enc_ticket->length;
2415 n = enc_ticket->length + 2;
2416
2417 /* KerberosWrapper.Authenticator */
2418 if (authp && authp->length)
2419 {
2420 s2n(authp->length,p);
2421 memcpy(p, authp->data, authp->length);
2422 p+= authp->length;
2423 n+= authp->length + 2;
2424
2425 free(authp->data);
2426 authp->data = NULL;
2427 authp->length = 0;
2428 }
2429 else
2430 {
2431 s2n(0,p);/* null authenticator length */
2432 n+=2;
2433 }
2434
2435 tmp_buf[0]=s->client_version>>8;
2436 tmp_buf[1]=s->client_version&0xff;
2437 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2438 goto err;
2439
2440 /* 20010420 VRS. Tried it this way; failed.
2441 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2442 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2443 ** kssl_ctx->length);
2444 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2445 */
2446
2447 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2448 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2449 kssl_ctx->key,iv);
2450 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2451 sizeof tmp_buf);
2452 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2453 outl += padl;
2454 if (outl > (int)sizeof epms)
2455 {
2456 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2457 goto err;
2458 }
2459 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2460
2461 /* KerberosWrapper.EncryptedPreMasterSecret */
2462 s2n(outl,p);
2463 memcpy(p, epms, outl);
2464 p+=outl;
2465 n+=outl + 2;
2466
2467 s->session->master_key_length=
2468 s->method->ssl3_enc->generate_master_secret(s,
2469 s->session->master_key,
2470 tmp_buf, sizeof tmp_buf);
2471
2472 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2473 OPENSSL_cleanse(epms, outl);
2474 }
2475 #endif
2476 #ifndef OPENSSL_NO_DH
2477 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2478 {
2479 DH *dh_srvr,*dh_clnt;
2480 SESS_CERT *scert = s->session->sess_cert;
2481
2482 if (scert == NULL)
2483 {
2484 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2485 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2486 goto err;
2487 }
2488
2489 if (scert->peer_dh_tmp != NULL)
2490 dh_srvr=scert->peer_dh_tmp;
2491 else
2492 {
2493 /* we get them from the cert */
2494 int idx = scert->peer_cert_type;
2495 EVP_PKEY *spkey = NULL;
2496 dh_srvr = NULL;
2497 if (idx >= 0)
2498 spkey = X509_get_pubkey(
2499 scert->peer_pkeys[idx].x509);
2500 if (spkey)
2501 {
2502 dh_srvr = EVP_PKEY_get1_DH(spkey);
2503 EVP_PKEY_free(spkey);
2504 }
2505 if (dh_srvr == NULL)
2506 {
2507 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2508 ERR_R_INTERNAL_ERROR);
2509 goto err;
2510 }
2511 }
2512 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2513 {
2514 /* Use client certificate key */
2515 EVP_PKEY *clkey = s->cert->key->privatekey;
2516 dh_clnt = NULL;
2517 if (clkey)
2518 dh_clnt = EVP_PKEY_get1_DH(clkey);
2519 if (dh_clnt == NULL)
2520 {
2521 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2522 ERR_R_INTERNAL_ERROR);
2523 goto err;
2524 }
2525 }
2526 else
2527 {
2528 /* generate a new random key */
2529 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2530 {
2531 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2532 goto err;
2533 }
2534 if (!DH_generate_key(dh_clnt))
2535 {
2536 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2537 DH_free(dh_clnt);
2538 goto err;
2539 }
2540 }
2541
2542 /* use the 'p' output buffer for the DH key, but
2543 * make sure to clear it out afterwards */
2544
2545 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2546 if (scert->peer_dh_tmp == NULL)
2547 DH_free(dh_srvr);
2548
2549 if (n <= 0)
2550 {
2551 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2552 DH_free(dh_clnt);
2553 goto err;
2554 }
2555
2556 /* generate master key from the result */
2557 s->session->master_key_length=
2558 s->method->ssl3_enc->generate_master_secret(s,
2559 s->session->master_key,p,n);
2560 /* clean up */
2561 memset(p,0,n);
2562
2563 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2564 n = 0;
2565 else
2566 {
2567 /* send off the data */
2568 n=BN_num_bytes(dh_clnt->pub_key);
2569 s2n(n,p);
2570 BN_bn2bin(dh_clnt->pub_key,p);
2571 n+=2;
2572 }
2573
2574 DH_free(dh_clnt);
2575
2576 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2577 }
2578 #endif
2579
2580 #ifndef OPENSSL_NO_ECDH
2581 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
2582 {
2583 const EC_GROUP *srvr_group = NULL;
2584 EC_KEY *tkey;
2585 int ecdh_clnt_cert = 0;
2586 int field_size = 0;
2587
2588 /* Did we send out the client's
2589 * ECDH share for use in premaster
2590 * computation as part of client certificate?
2591 * If so, set ecdh_clnt_cert to 1.
2592 */
2593 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2594 {
2595 /* XXX: For now, we do not support client
2596 * authentication using ECDH certificates.
2597 * To add such support, one needs to add
2598 * code that checks for appropriate
2599 * conditions and sets ecdh_clnt_cert to 1.
2600 * For example, the cert have an ECC
2601 * key on the same curve as the server's
2602 * and the key should be authorized for
2603 * key agreement.
2604 *
2605 * One also needs to add code in ssl3_connect
2606 * to skip sending the certificate verify
2607 * message.
2608 *
2609 * if ((s->cert->key->privatekey != NULL) &&
2610 * (s->cert->key->privatekey->type ==
2611 * EVP_PKEY_EC) && ...)
2612 * ecdh_clnt_cert = 1;
2613 */
2614 }
2615
2616 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2617 {
2618 tkey = s->session->sess_cert->peer_ecdh_tmp;
2619 }
2620 else
2621 {
2622 /* Get the Server Public Key from Cert */
2623 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2624 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2625 if ((srvr_pub_pkey == NULL) ||
2626 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2627 (srvr_pub_pkey->pkey.ec == NULL))
2628 {
2629 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2630 ERR_R_INTERNAL_ERROR);
2631 goto err;
2632 }
2633
2634 tkey = srvr_pub_pkey->pkey.ec;
2635 }
2636
2637 srvr_group = EC_KEY_get0_group(tkey);
2638 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2639
2640 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2641 {
2642 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2643 ERR_R_INTERNAL_ERROR);
2644 goto err;
2645 }
2646
2647 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2648 {
2649 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2650 goto err;
2651 }
2652
2653 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2654 {
2655 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2656 goto err;
2657 }
2658 if (ecdh_clnt_cert)
2659 {
2660 /* Reuse key info from our certificate
2661 * We only need our private key to perform
2662 * the ECDH computation.
2663 */
2664 const BIGNUM *priv_key;
2665 tkey = s->cert->key->privatekey->pkey.ec;
2666 priv_key = EC_KEY_get0_private_key(tkey);
2667 if (priv_key == NULL)
2668 {
2669 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2670 goto err;
2671 }
2672 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2673 {
2674 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2675 goto err;
2676 }
2677 }
2678 else
2679 {
2680 /* Generate a new ECDH key pair */
2681 if (!(EC_KEY_generate_key(clnt_ecdh)))
2682 {
2683 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2684 goto err;
2685 }
2686 }
2687
2688 /* use the 'p' output buffer for the ECDH key, but
2689 * make sure to clear it out afterwards
2690 */
2691
2692 field_size = EC_GROUP_get_degree(srvr_group);
2693 if (field_size <= 0)
2694 {
2695 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2696 ERR_R_ECDH_LIB);
2697 goto err;
2698 }
2699 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2700 if (n <= 0)
2701 {
2702 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2703 ERR_R_ECDH_LIB);
2704 goto err;
2705 }
2706
2707 /* generate master key from the result */
2708 s->session->master_key_length = s->method->ssl3_enc \
2709 -> generate_master_secret(s,
2710 s->session->master_key,
2711 p, n);
2712
2713 memset(p, 0, n); /* clean up */
2714
2715 if (ecdh_clnt_cert)
2716 {
2717 /* Send empty client key exch message */
2718 n = 0;
2719 }
2720 else
2721 {
2722 /* First check the size of encoding and
2723 * allocate memory accordingly.
2724 */
2725 encoded_pt_len =
2726 EC_POINT_point2oct(srvr_group,
2727 EC_KEY_get0_public_key(clnt_ecdh),
2728 POINT_CONVERSION_UNCOMPRESSED,
2729 NULL, 0, NULL);
2730
2731 encodedPoint = (unsigned char *)
2732 OPENSSL_malloc(encoded_pt_len *
2733 sizeof(unsigned char));
2734 bn_ctx = BN_CTX_new();
2735 if ((encodedPoint == NULL) ||
2736 (bn_ctx == NULL))
2737 {
2738 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2739 goto err;
2740 }
2741
2742 /* Encode the public key */
2743 n = EC_POINT_point2oct(srvr_group,
2744 EC_KEY_get0_public_key(clnt_ecdh),
2745 POINT_CONVERSION_UNCOMPRESSED,
2746 encodedPoint, encoded_pt_len, bn_ctx);
2747
2748 *p = n; /* length of encoded point */
2749 /* Encoded point will be copied here */
2750 p += 1;
2751 /* copy the point */
2752 memcpy((unsigned char *)p, encodedPoint, n);
2753 /* increment n to account for length field */
2754 n += 1;
2755 }
2756
2757 /* Free allocated memory */
2758 BN_CTX_free(bn_ctx);
2759 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2760 if (clnt_ecdh != NULL)
2761 EC_KEY_free(clnt_ecdh);
2762 EVP_PKEY_free(srvr_pub_pkey);
2763 }
2764 #endif /* !OPENSSL_NO_ECDH */
2765 else if (alg_k & SSL_kGOST)
2766 {
2767 /* GOST key exchange message creation */
2768 EVP_PKEY_CTX *pkey_ctx;
2769 X509 *peer_cert;
2770 size_t msglen;
2771 unsigned int md_len;
2772 int keytype;
2773 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2774 EVP_MD_CTX *ukm_hash;
2775 EVP_PKEY *pub_key;
2776
2777 /* Get server sertificate PKEY and create ctx from it */
2778 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2779 if (!peer_cert)
2780 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2781 if (!peer_cert) {
2782 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2783 goto err;
2784 }
2785
2786 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2787 /* If we have send a certificate, and certificate key
2788
2789 * parameters match those of server certificate, use
2790 * certificate key for key exchange
2791 */
2792
2793 /* Otherwise, generate ephemeral key pair */
2794
2795 EVP_PKEY_encrypt_init(pkey_ctx);
2796 /* Generate session key */
2797 RAND_bytes(premaster_secret,32);
2798 /* If we have client certificate, use its secret as peer key */
2799 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2800 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
2801 /* If there was an error - just ignore it. Ephemeral key
2802 * would be used
2803 */
2804 ERR_clear_error();
2805 }
2806 }
2807 /* Compute shared IV and store it in algorithm-specific
2808 * context data */
2809 ukm_hash = EVP_MD_CTX_create();
2810 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
2811 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
2812 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
2813 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2814 EVP_MD_CTX_destroy(ukm_hash);
2815 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
2816 8,shared_ukm)<0) {
2817 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2818 SSL_R_LIBRARY_BUG);
2819 goto err;
2820 }
2821 /* Make GOST keytransport blob message */
2822 /*Encapsulate it into sequence */
2823 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2824 msglen=255;
2825 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
2826 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2827 SSL_R_LIBRARY_BUG);
2828 goto err;
2829 }
2830 if (msglen >= 0x80)
2831 {
2832 *(p++)=0x81;
2833 *(p++)= msglen & 0xff;
2834 n=msglen+3;
2835 }
2836 else
2837 {
2838 *(p++)= msglen & 0xff;
2839 n=msglen+2;
2840 }
2841 memcpy(p, tmp, msglen);
2842 /* Check if pubkey from client certificate was used */
2843 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2844 {
2845 /* Set flag "skip certificate verify" */
2846 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2847 }
2848 EVP_PKEY_CTX_free(pkey_ctx);
2849 s->session->master_key_length=
2850 s->method->ssl3_enc->generate_master_secret(s,
2851 s->session->master_key,premaster_secret,32);
2852 EVP_PKEY_free(pub_key);
2853
2854 }
2855 #ifndef OPENSSL_NO_SRP
2856 else if (alg_k & SSL_kSRP)
2857 {
2858 if (s->srp_ctx.A != NULL)
2859 {
2860 /* send off the data */
2861 n=BN_num_bytes(s->srp_ctx.A);
2862 s2n(n,p);
2863 BN_bn2bin(s->srp_ctx.A,p);
2864 n+=2;
2865 }
2866 else
2867 {
2868 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2869 goto err;
2870 }
2871 if (s->session->srp_username != NULL)
2872 OPENSSL_free(s->session->srp_username);
2873 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2874 if (s->session->srp_username == NULL)
2875 {
2876 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2877 ERR_R_MALLOC_FAILURE);
2878 goto err;
2879 }
2880
2881 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
2882 {
2883 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2884 goto err;
2885 }
2886 }
2887 #endif
2888 #ifndef OPENSSL_NO_PSK
2889 else if (alg_k & SSL_kPSK)
2890 {
2891 char identity[PSK_MAX_IDENTITY_LEN];
2892 unsigned char *t = NULL;
2893 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
2894 unsigned int pre_ms_len = 0, psk_len = 0;
2895 int psk_err = 1;
2896
2897 n = 0;
2898 if (s->psk_client_callback == NULL)
2899 {
2900 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2901 SSL_R_PSK_NO_CLIENT_CB);
2902 goto err;
2903 }
2904
2905 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
2906 identity, PSK_MAX_IDENTITY_LEN,
2907 psk_or_pre_ms, sizeof(psk_or_pre_ms));
2908 if (psk_len > PSK_MAX_PSK_LEN)
2909 {
2910 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2911 ERR_R_INTERNAL_ERROR);
2912 goto psk_err;
2913 }
2914 else if (psk_len == 0)
2915 {
2916 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2917 SSL_R_PSK_IDENTITY_NOT_FOUND);
2918 goto psk_err;
2919 }
2920
2921 /* create PSK pre_master_secret */
2922 pre_ms_len = 2+psk_len+2+psk_len;
2923 t = psk_or_pre_ms;
2924 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
2925 s2n(psk_len, t);
2926 memset(t, 0, psk_len);
2927 t+=psk_len;
2928 s2n(psk_len, t);
2929
2930 if (s->session->psk_identity_hint != NULL)
2931 OPENSSL_free(s->session->psk_identity_hint);
2932 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
2933 if (s->ctx->psk_identity_hint != NULL &&
2934 s->session->psk_identity_hint == NULL)
2935 {
2936 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2937 ERR_R_MALLOC_FAILURE);
2938 goto psk_err;
2939 }
2940
2941 if (s->session->psk_identity != NULL)
2942 OPENSSL_free(s->session->psk_identity);
2943 s->session->psk_identity = BUF_strdup(identity);
2944 if (s->session->psk_identity == NULL)
2945 {
2946 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2947 ERR_R_MALLOC_FAILURE);
2948 goto psk_err;
2949 }
2950
2951 s->session->master_key_length =
2952 s->method->ssl3_enc->generate_master_secret(s,
2953 s->session->master_key,
2954 psk_or_pre_ms, pre_ms_len);
2955 n = strlen(identity);
2956 s2n(n, p);
2957 memcpy(p, identity, n);
2958 n+=2;
2959 psk_err = 0;
2960 psk_err:
2961 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
2962 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
2963 if (psk_err != 0)
2964 {
2965 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2966 goto err;
2967 }
2968 }
2969 #endif
2970 else
2971 {
2972 ssl3_send_alert(s, SSL3_AL_FATAL,
2973 SSL_AD_HANDSHAKE_FAILURE);
2974 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2975 ERR_R_INTERNAL_ERROR);
2976 goto err;
2977 }
2978
2979 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
2980 l2n3(n,d);
2981
2982 s->state=SSL3_ST_CW_KEY_EXCH_B;
2983 /* number of bytes to write */
2984 s->init_num=n+4;
2985 s->init_off=0;
2986 }
2987
2988 /* SSL3_ST_CW_KEY_EXCH_B */
2989 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2990 err:
2991 #ifndef OPENSSL_NO_ECDH
2992 BN_CTX_free(bn_ctx);
2993 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2994 if (clnt_ecdh != NULL)
2995 EC_KEY_free(clnt_ecdh);
2996 EVP_PKEY_free(srvr_pub_pkey);
2997 #endif
2998 return(-1);
2999 }
3000
3001 int ssl3_send_client_verify(SSL *s)
3002 {
3003 unsigned char *p,*d;
3004 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
3005 EVP_PKEY *pkey;
3006 EVP_PKEY_CTX *pctx=NULL;
3007 EVP_MD_CTX mctx;
3008 unsigned u=0;
3009 unsigned long n;
3010 int j;
3011
3012 EVP_MD_CTX_init(&mctx);
3013
3014 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
3015 {
3016 d=(unsigned char *)s->init_buf->data;
3017 p= &(d[4]);
3018 pkey=s->cert->key->privatekey;
3019 /* Create context from key and test if sha1 is allowed as digest */
3020 pctx = EVP_PKEY_CTX_new(pkey,NULL);
3021 EVP_PKEY_sign_init(pctx);
3022 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
3023 {
3024 if (TLS1_get_version(s) < TLS1_2_VERSION)
3025 s->method->ssl3_enc->cert_verify_mac(s,
3026 NID_sha1,
3027 &(data[MD5_DIGEST_LENGTH]));
3028 }
3029 else
3030 {
3031 ERR_clear_error();
3032 }
3033 /* For TLS v1.2 send signature algorithm and signature
3034 * using agreed digest and cached handshake records.
3035 */
3036 if (TLS1_get_version(s) >= TLS1_2_VERSION)
3037 {
3038 long hdatalen = 0;
3039 void *hdata;
3040 const EVP_MD *md = s->cert->key->digest;
3041 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
3042 &hdata);
3043 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
3044 {
3045 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3046 ERR_R_INTERNAL_ERROR);
3047 goto err;
3048 }
3049 p += 2;
3050 #ifdef SSL_DEBUG
3051 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
3052 EVP_MD_name(md));
3053 #endif
3054 if (!EVP_SignInit_ex(&mctx, md, NULL)
3055 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3056 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
3057 {
3058 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3059 ERR_R_EVP_LIB);
3060 goto err;
3061 }
3062 s2n(u,p);
3063 n = u + 4;
3064 if (!ssl3_digest_cached_records(s))
3065 goto err;
3066 }
3067 else
3068 #ifndef OPENSSL_NO_RSA
3069 if (pkey->type == EVP_PKEY_RSA)
3070 {
3071 s->method->ssl3_enc->cert_verify_mac(s,
3072 NID_md5,
3073 &(data[0]));
3074 if (RSA_sign(NID_md5_sha1, data,
3075 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3076 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3077 {
3078 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3079 goto err;
3080 }
3081 s2n(u,p);
3082 n=u+2;
3083 }
3084 else
3085 #endif
3086 #ifndef OPENSSL_NO_DSA
3087 if (pkey->type == EVP_PKEY_DSA)
3088 {
3089 if (!DSA_sign(pkey->save_type,
3090 &(data[MD5_DIGEST_LENGTH]),
3091 SHA_DIGEST_LENGTH,&(p[2]),
3092 (unsigned int *)&j,pkey->pkey.dsa))
3093 {
3094 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3095 goto err;
3096 }
3097 s2n(j,p);
3098 n=j+2;
3099 }
3100 else
3101 #endif
3102 #ifndef OPENSSL_NO_ECDSA
3103 if (pkey->type == EVP_PKEY_EC)
3104 {
3105 if (!ECDSA_sign(pkey->save_type,
3106 &(data[MD5_DIGEST_LENGTH]),
3107 SHA_DIGEST_LENGTH,&(p[2]),
3108 (unsigned int *)&j,pkey->pkey.ec))
3109 {
3110 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3111 ERR_R_ECDSA_LIB);
3112 goto err;
3113 }
3114 s2n(j,p);
3115 n=j+2;
3116 }
3117 else
3118 #endif
3119 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3120 {
3121 unsigned char signbuf[64];
3122 int i;
3123 size_t sigsize=64;
3124 s->method->ssl3_enc->cert_verify_mac(s,
3125 NID_id_GostR3411_94,
3126 data);
3127 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3128 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3129 ERR_R_INTERNAL_ERROR);
3130 goto err;
3131 }
3132 for (i=63,j=0; i>=0; j++, i--) {
3133 p[2+j]=signbuf[i];
3134 }
3135 s2n(j,p);
3136 n=j+2;
3137 }
3138 else
3139 {
3140 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3141 goto err;
3142 }
3143 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
3144 l2n3(n,d);
3145
3146 s->state=SSL3_ST_CW_CERT_VRFY_B;
3147 s->init_num=(int)n+4;
3148 s->init_off=0;
3149 }
3150 EVP_MD_CTX_cleanup(&mctx);
3151 EVP_PKEY_CTX_free(pctx);
3152 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3153 err:
3154 EVP_MD_CTX_cleanup(&mctx);
3155 EVP_PKEY_CTX_free(pctx);
3156 return(-1);
3157 }
3158
3159 /* Check a certificate can be used for client authentication. Currently
3160 * check cert exists, if we have a suitable digest for TLS 1.2 if
3161 * static DH client certificates can be used and optionally checks
3162 * suitability for Suite B.
3163 */
3164 static int ssl3_check_client_certificate(SSL *s)
3165 {
3166 unsigned long alg_k;
3167 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
3168 return 0;
3169 /* If no suitable signature algorithm can't use certificate */
3170 if (TLS1_get_version(s) >= TLS1_2_VERSION && !s->cert->key->digest)
3171 return 0;
3172 /* If strict mode check suitability of chain before using it.
3173 * This also adjusts suite B digest if necessary.
3174 */
3175 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
3176 !tls1_check_chain(s, NULL, NULL, NULL, -2))
3177 return 0;
3178 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3179 /* See if we can use client certificate for fixed DH */
3180 if (alg_k & (SSL_kDHr|SSL_kDHd))
3181 {
3182 SESS_CERT *scert = s->session->sess_cert;
3183 int i = scert->peer_cert_type;
3184 EVP_PKEY *clkey = NULL, *spkey = NULL;
3185 clkey = s->cert->key->privatekey;
3186 /* If client key not DH assume it can be used */
3187 if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
3188 return 1;
3189 if (i >= 0)
3190 spkey = X509_get_pubkey(scert->peer_pkeys[i].x509);
3191 if (spkey)
3192 {
3193 /* Compare server and client parameters */
3194 i = EVP_PKEY_cmp_parameters(clkey, spkey);
3195 EVP_PKEY_free(spkey);
3196 if (i != 1)
3197 return 0;
3198 }
3199 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3200 }
3201 return 1;
3202 }
3203
3204 int ssl3_send_client_certificate(SSL *s)
3205 {
3206 X509 *x509=NULL;
3207 EVP_PKEY *pkey=NULL;
3208 int i;
3209 unsigned long l;
3210
3211 if (s->state == SSL3_ST_CW_CERT_A)
3212 {
3213 /* Let cert callback update client certificates if required */
3214 if (s->cert->cert_cb
3215 && s->cert->cert_cb(s, s->cert->cert_cb_arg) <= 0)
3216 {
3217 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3218 return 0;
3219 }
3220 if (ssl3_check_client_certificate(s))
3221 s->state=SSL3_ST_CW_CERT_C;
3222 else
3223 s->state=SSL3_ST_CW_CERT_B;
3224 }
3225
3226 /* We need to get a client cert */
3227 if (s->state == SSL3_ST_CW_CERT_B)
3228 {
3229 /* If we get an error, we need to
3230 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3231 * We then get retied later */
3232 i=0;
3233 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3234 if (i < 0)
3235 {
3236 s->rwstate=SSL_X509_LOOKUP;
3237 return(-1);
3238 }
3239 s->rwstate=SSL_NOTHING;
3240 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3241 {
3242 s->state=SSL3_ST_CW_CERT_B;
3243 if ( !SSL_use_certificate(s,x509) ||
3244 !SSL_use_PrivateKey(s,pkey))
3245 i=0;
3246 }
3247 else if (i == 1)
3248 {
3249 i=0;
3250 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3251 }
3252
3253 if (x509 != NULL) X509_free(x509);
3254 if (pkey != NULL) EVP_PKEY_free(pkey);
3255 if (i && !ssl3_check_client_certificate(s))
3256 i = 0;
3257 if (i == 0)
3258 {
3259 if (s->version == SSL3_VERSION)
3260 {
3261 s->s3->tmp.cert_req=0;
3262 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3263 return(1);
3264 }
3265 else
3266 {
3267 s->s3->tmp.cert_req=2;
3268 }
3269 }
3270
3271 /* Ok, we have a cert */
3272 s->state=SSL3_ST_CW_CERT_C;
3273 }
3274
3275 if (s->state == SSL3_ST_CW_CERT_C)
3276 {
3277 s->state=SSL3_ST_CW_CERT_D;
3278 l=ssl3_output_cert_chain(s,
3279 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key);
3280 s->init_num=(int)l;
3281 s->init_off=0;
3282 }
3283 /* SSL3_ST_CW_CERT_D */
3284 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3285 }
3286
3287 #define has_bits(i,m) (((i)&(m)) == (m))
3288
3289 int ssl3_check_cert_and_algorithm(SSL *s)
3290 {
3291 int i,idx;
3292 long alg_k,alg_a;
3293 EVP_PKEY *pkey=NULL;
3294 SESS_CERT *sc;
3295 #ifndef OPENSSL_NO_RSA
3296 RSA *rsa;
3297 #endif
3298 #ifndef OPENSSL_NO_DH
3299 DH *dh;
3300 #endif
3301
3302 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3303 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3304
3305 /* we don't have a certificate */
3306 if ((alg_a & (SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3307 return(1);
3308
3309 sc=s->session->sess_cert;
3310 if (sc == NULL)
3311 {
3312 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3313 goto err;
3314 }
3315
3316 #ifndef OPENSSL_NO_RSA
3317 rsa=s->session->sess_cert->peer_rsa_tmp;
3318 #endif
3319 #ifndef OPENSSL_NO_DH
3320 dh=s->session->sess_cert->peer_dh_tmp;
3321 #endif
3322
3323 /* This is the passed certificate */
3324
3325 idx=sc->peer_cert_type;
3326 #ifndef OPENSSL_NO_ECDH
3327 if (idx == SSL_PKEY_ECC)
3328 {
3329 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3330 s) == 0)
3331 { /* check failed */
3332 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3333 goto f_err;
3334 }
3335 else
3336 {
3337 return 1;
3338 }
3339 }
3340 else if (alg_a & SSL_aECDSA)
3341 {
3342 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDSA_SIGNING_CERT);
3343 goto f_err;
3344 }
3345 else if (alg_k & (SSL_kECDHr|SSL_kECDHe))
3346 {
3347 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDH_CERT);
3348 goto f_err;
3349 }
3350 #endif
3351 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3352 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3353 EVP_PKEY_free(pkey);
3354
3355
3356 /* Check that we have a certificate if we require one */
3357 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3358 {
3359 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3360 goto f_err;
3361 }
3362 #ifndef OPENSSL_NO_DSA
3363 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3364 {
3365 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3366 goto f_err;
3367 }
3368 #endif
3369 #ifndef OPENSSL_NO_RSA
3370 if ((alg_k & SSL_kRSA) &&
3371 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3372 {
3373 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3374 goto f_err;
3375 }
3376 #endif
3377 #ifndef OPENSSL_NO_DH
3378 if ((alg_k & SSL_kEDH) &&
3379 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3380 {
3381 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3382 goto f_err;
3383 }
3384 else if ((alg_k & SSL_kDHr) && (TLS1_get_version(s) < TLS1_2_VERSION) &&
3385 !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3386 {
3387 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3388 goto f_err;
3389 }
3390 #ifndef OPENSSL_NO_DSA
3391 else if ((alg_k & SSL_kDHd) && (TLS1_get_version(s) < TLS1_2_VERSION) &&
3392 !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3393 {
3394 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3395 goto f_err;
3396 }
3397 #endif
3398 #endif
3399
3400 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3401 {
3402 #ifndef OPENSSL_NO_RSA
3403 if (alg_k & SSL_kRSA)
3404 {
3405 if (rsa == NULL
3406 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3407 {
3408 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3409 goto f_err;
3410 }
3411 }
3412 else
3413 #endif
3414 #ifndef OPENSSL_NO_DH
3415 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
3416 {
3417 if (dh == NULL
3418 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3419 {
3420 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3421 goto f_err;
3422 }
3423 }
3424 else
3425 #endif
3426 {
3427 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3428 goto f_err;
3429 }
3430 }
3431 return(1);
3432 f_err:
3433 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3434 err:
3435 return(0);
3436 }
3437
3438 /* Check to see if handshake is full or resumed. Usually this is just a
3439 * case of checking to see if a cache hit has occurred. In the case of
3440 * session tickets we have to check the next message to be sure.
3441 */
3442
3443 #ifndef OPENSSL_NO_TLSEXT
3444 # ifndef OPENSSL_NO_NEXTPROTONEG
3445 int ssl3_send_next_proto(SSL *s)
3446 {
3447 unsigned int len, padding_len;
3448 unsigned char *d;
3449
3450 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3451 {
3452 len = s->next_proto_negotiated_len;
3453 padding_len = 32 - ((len + 2) % 32);
3454 d = (unsigned char *)s->init_buf->data;
3455 d[4] = len;
3456 memcpy(d + 5, s->next_proto_negotiated, len);
3457 d[5 + len] = padding_len;
3458 memset(d + 6 + len, 0, padding_len);
3459 *(d++)=SSL3_MT_NEXT_PROTO;
3460 l2n3(2 + len + padding_len, d);
3461 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3462 s->init_num = 4 + 2 + len + padding_len;
3463 s->init_off = 0;
3464 }
3465
3466 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3467 }
3468 # endif
3469
3470 int ssl3_check_finished(SSL *s)
3471 {
3472 int ok;
3473 long n;
3474 /* If we have no ticket it cannot be a resumed session. */
3475 if (!s->session->tlsext_tick)
3476 return 1;
3477 /* this function is called when we really expect a Certificate
3478 * message, so permit appropriate message length */
3479 n=s->method->ssl_get_message(s,
3480 SSL3_ST_CR_CERT_A,
3481 SSL3_ST_CR_CERT_B,
3482 -1,
3483 s->max_cert_list,
3484 &ok);
3485 if (!ok) return((int)n);
3486 s->s3->tmp.reuse_message = 1;
3487 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3488 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3489 return 2;
3490
3491 return 1;
3492 }
3493 #endif
3494
3495 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3496 {
3497 int i = 0;
3498 #ifndef OPENSSL_NO_ENGINE
3499 if (s->ctx->client_cert_engine)
3500 {
3501 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3502 SSL_get_client_CA_list(s),
3503 px509, ppkey, NULL, NULL, NULL);
3504 if (i != 0)
3505 return i;
3506 }
3507 #endif
3508 if (s->ctx->client_cert_cb)
3509 i = s->ctx->client_cert_cb(s,px509,ppkey);
3510 return i;
3511 }
3512
3513 #ifndef OPENSSL_NO_TLSEXT
3514 int tls1_get_server_supplemental_data(SSL *s)
3515 {
3516 int al;
3517 int ok;
3518 unsigned long supp_data_len, authz_data_len;
3519 long n;
3520 unsigned short supp_data_type, authz_data_type, proof_len;
3521 const unsigned char *p;
3522 unsigned char *new_proof;
3523
3524 n=s->method->ssl_get_message(s,
3525 SSL3_ST_CR_SUPPLEMENTAL_DATA_A,
3526 SSL3_ST_CR_SUPPLEMENTAL_DATA_B,
3527 SSL3_MT_SUPPLEMENTAL_DATA,
3528 /* use default limit */
3529 TLSEXT_MAXLEN_supplemental_data,
3530 &ok);
3531
3532 if (!ok) return((int)n);
3533
3534 p = (unsigned char *)s->init_msg;
3535
3536 /* The message cannot be empty */
3537 if (n < 3)
3538 {
3539 al = SSL_AD_DECODE_ERROR;
3540 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA,SSL_R_LENGTH_MISMATCH);
3541 goto f_err;
3542 }
3543 /* Length of supplemental data */
3544 n2l3(p,supp_data_len);
3545 n -= 3;
3546 /* We must have at least one supplemental data entry
3547 * with type (1 byte) and length (2 bytes). */
3548 if (supp_data_len != (unsigned long) n || n < 4)
3549 {
3550 al = SSL_AD_DECODE_ERROR;
3551 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA,SSL_R_LENGTH_MISMATCH);
3552 goto f_err;
3553 }
3554 /* Supplemental data type: must be authz_data */
3555 n2s(p,supp_data_type);
3556 n -= 2;
3557 if (supp_data_type != TLSEXT_SUPPLEMENTALDATATYPE_authz_data)
3558 {
3559 al = SSL_AD_UNEXPECTED_MESSAGE;
3560 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA,SSL_R_UNKNOWN_SUPPLEMENTAL_DATA_TYPE);
3561 goto f_err;
3562 }
3563 /* Authz data length */
3564 n2s(p, authz_data_len);
3565 n -= 2;
3566 if (authz_data_len != (unsigned long) n || n < 1)
3567 {
3568 al = SSL_AD_DECODE_ERROR;
3569 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA,SSL_R_LENGTH_MISMATCH);
3570 goto f_err;
3571 }
3572 /* Authz data type: must be audit_proof */
3573 authz_data_type = *(p++);
3574 n -= 1;
3575 if (authz_data_type != TLSEXT_AUTHZDATAFORMAT_audit_proof)
3576 {
3577 al=SSL_AD_UNEXPECTED_MESSAGE;
3578 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA,SSL_R_UNKNOWN_AUTHZ_DATA_TYPE);
3579 goto f_err;
3580 }
3581 /* We have a proof: read its length */
3582 if (n < 2)
3583 {
3584 al = SSL_AD_DECODE_ERROR;
3585 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA,SSL_R_LENGTH_MISMATCH);
3586 goto f_err;
3587 }
3588 n2s(p, proof_len);
3589 n -= 2;
3590 if (proof_len != (unsigned long) n)
3591 {
3592 al = SSL_AD_DECODE_ERROR;
3593 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA,SSL_R_LENGTH_MISMATCH);
3594 goto f_err;
3595 }
3596 /* Store the proof */
3597 new_proof = OPENSSL_realloc(s->session->audit_proof,
3598 proof_len);
3599 if (new_proof == NULL)
3600 {
3601 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA,ERR_R_MALLOC_FAILURE);
3602 return 0;
3603 }
3604 s->session->audit_proof_length = proof_len;
3605 s->session->audit_proof = new_proof;
3606 memcpy(s->session->audit_proof, p, proof_len);
3607
3608 /* Got the proof, but can't verify it yet. */
3609 return 1;
3610 f_err:
3611 ssl3_send_alert(s,SSL3_AL_FATAL,al);
3612 return -1;
3613 }
3614 #endif
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