]> git.ipfire.org Git - thirdparty/openssl.git/blob - ssl/s3_clnt.c
projects / thirdparty / openssl.git / blob
? search:


3e6a9d4d4c1e7813c79ed26d5359dd603cfdbb4b
[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 <openssl/crypto.h>
153 #include "ssl_locl.h"
154 #include "kssl_lcl.h"
155 #include <openssl/buffer.h>
156 #include <openssl/rand.h>
157 #include <openssl/objects.h>
158 #include <openssl/evp.h>
159 #include <openssl/md5.h>
160 #ifdef OPENSSL_FIPS
161 #include <openssl/fips.h>
162 #endif
163 #ifndef OPENSSL_NO_DH
164 #include <openssl/dh.h>
165 #endif
166 #include <openssl/bn.h>
167 #ifndef OPENSSL_NO_ENGINE
168 #include <openssl/engine.h>
169 #endif
170
171 static const SSL_METHOD *ssl3_get_client_method(int ver);
172 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
173
174 static const SSL_METHOD *ssl3_get_client_method(int ver)
175 {
176 if (ver == SSL3_VERSION)
177 return(SSLv3_client_method());
178 else
179 return(NULL);
180 }
181
182 IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
183 ssl_undefined_function,
184 ssl3_connect,
185 ssl3_get_client_method)
186
187 int ssl3_connect(SSL *s)
188 {
189 BUF_MEM *buf=NULL;
190 unsigned long Time=(unsigned long)time(NULL);
191 void (*cb)(const SSL *ssl,int type,int val)=NULL;
192 int ret= -1;
193 int new_state,state,skip=0;
194
195 RAND_add(&Time,sizeof(Time),0);
196 ERR_clear_error();
197 clear_sys_error();
198
199 if (s->info_callback != NULL)
200 cb=s->info_callback;
201 else if (s->ctx->info_callback != NULL)
202 cb=s->ctx->info_callback;
203
204 s->in_handshake++;
205 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
206
207 #ifndef OPENSSL_NO_HEARTBEATS
208 /* If we're awaiting a HeartbeatResponse, pretend we
209 * already got and don't await it anymore, because
210 * Heartbeats don't make sense during handshakes anyway.
211 */
212 if (s->tlsext_hb_pending)
213 {
214 s->tlsext_hb_pending = 0;
215 s->tlsext_hb_seq++;
216 }
217 #endif
218
219 for (;;)
220 {
221 state=s->state;
222
223 switch(s->state)
224 {
225 case SSL_ST_RENEGOTIATE:
226 s->renegotiate=1;
227 s->state=SSL_ST_CONNECT;
228 s->ctx->stats.sess_connect_renegotiate++;
229 /* break */
230 case SSL_ST_BEFORE:
231 case SSL_ST_CONNECT:
232 case SSL_ST_BEFORE|SSL_ST_CONNECT:
233 case SSL_ST_OK|SSL_ST_CONNECT:
234
235 s->server=0;
236 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
237
238 if ((s->version & 0xff00 ) != 0x0300)
239 {
240 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
241 ret = -1;
242 goto end;
243 }
244
245 /* s->version=SSL3_VERSION; */
246 s->type=SSL_ST_CONNECT;
247
248 if (s->init_buf == NULL)
249 {
250 if ((buf=BUF_MEM_new()) == NULL)
251 {
252 ret= -1;
253 goto end;
254 }
255 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
256 {
257 ret= -1;
258 goto end;
259 }
260 s->init_buf=buf;
261 buf=NULL;
262 }
263
264 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
265
266 /* setup buffing BIO */
267 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
268
269 /* don't push the buffering BIO quite yet */
270
271 ssl3_init_finished_mac(s);
272
273 s->state=SSL3_ST_CW_CLNT_HELLO_A;
274 s->ctx->stats.sess_connect++;
275 s->init_num=0;
276 break;
277
278 case SSL3_ST_CW_CLNT_HELLO_A:
279 case SSL3_ST_CW_CLNT_HELLO_B:
280
281 s->shutdown=0;
282 ret=ssl3_client_hello(s);
283 if (ret <= 0) goto end;
284 s->state=SSL3_ST_CR_SRVR_HELLO_A;
285 s->init_num=0;
286
287 /* turn on buffering for the next lot of output */
288 if (s->bbio != s->wbio)
289 s->wbio=BIO_push(s->bbio,s->wbio);
290
291 break;
292
293 case SSL3_ST_CR_SRVR_HELLO_A:
294 case SSL3_ST_CR_SRVR_HELLO_B:
295 ret=ssl3_get_server_hello(s);
296 if (ret <= 0) goto end;
297
298 if (s->hit)
299 {
300 s->state=SSL3_ST_CR_FINISHED_A;
301 #ifndef OPENSSL_NO_TLSEXT
302 if (s->tlsext_ticket_expected)
303 {
304 /* receive renewed session ticket */
305 s->state=SSL3_ST_CR_SESSION_TICKET_A;
306 }
307 #endif
308 }
309 else
310 s->state=SSL3_ST_CR_CERT_A;
311 s->init_num=0;
312 break;
313
314 case SSL3_ST_CR_CERT_A:
315 case SSL3_ST_CR_CERT_B:
316 #ifndef OPENSSL_NO_TLSEXT
317 ret=ssl3_check_finished(s);
318 if (ret <= 0) goto end;
319 if (ret == 2)
320 {
321 s->hit = 1;
322 if (s->tlsext_ticket_expected)
323 s->state=SSL3_ST_CR_SESSION_TICKET_A;
324 else
325 s->state=SSL3_ST_CR_FINISHED_A;
326 s->init_num=0;
327 break;
328 }
329 #endif
330 /* Check if it is anon DH/ECDH */
331 /* or PSK */
332 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
333 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
334 {
335 ret=ssl3_get_server_certificate(s);
336 if (ret <= 0) goto end;
337 #ifndef OPENSSL_NO_TLSEXT
338 if (s->tlsext_status_expected)
339 s->state=SSL3_ST_CR_CERT_STATUS_A;
340 else
341 s->state=SSL3_ST_CR_KEY_EXCH_A;
342 }
343 else
344 {
345 skip = 1;
346 s->state=SSL3_ST_CR_KEY_EXCH_A;
347 }
348 #else
349 }
350 else
351 skip=1;
352
353 s->state=SSL3_ST_CR_KEY_EXCH_A;
354 #endif
355 s->init_num=0;
356 break;
357
358 case SSL3_ST_CR_KEY_EXCH_A:
359 case SSL3_ST_CR_KEY_EXCH_B:
360 ret=ssl3_get_key_exchange(s);
361 if (ret <= 0) goto end;
362 s->state=SSL3_ST_CR_CERT_REQ_A;
363 s->init_num=0;
364
365 /* at this point we check that we have the
366 * required stuff from the server */
367 if (!ssl3_check_cert_and_algorithm(s))
368 {
369 ret= -1;
370 goto end;
371 }
372 break;
373
374 case SSL3_ST_CR_CERT_REQ_A:
375 case SSL3_ST_CR_CERT_REQ_B:
376 ret=ssl3_get_certificate_request(s);
377 if (ret <= 0) goto end;
378 s->state=SSL3_ST_CR_SRVR_DONE_A;
379 s->init_num=0;
380 break;
381
382 case SSL3_ST_CR_SRVR_DONE_A:
383 case SSL3_ST_CR_SRVR_DONE_B:
384 ret=ssl3_get_server_done(s);
385 if (ret <= 0) goto end;
386 #ifndef OPENSSL_NO_SRP
387 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP)
388 {
389 if ((ret = SRP_Calc_A_param(s))<=0)
390 {
391 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
392 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
393 goto end;
394 }
395 }
396 #endif
397 if (s->s3->tmp.cert_req)
398 s->state=SSL3_ST_CW_CERT_A;
399 else
400 s->state=SSL3_ST_CW_KEY_EXCH_A;
401 s->init_num=0;
402
403 break;
404
405 case SSL3_ST_CW_CERT_A:
406 case SSL3_ST_CW_CERT_B:
407 case SSL3_ST_CW_CERT_C:
408 case SSL3_ST_CW_CERT_D:
409 ret=ssl3_send_client_certificate(s);
410 if (ret <= 0) goto end;
411 s->state=SSL3_ST_CW_KEY_EXCH_A;
412 s->init_num=0;
413 break;
414
415 case SSL3_ST_CW_KEY_EXCH_A:
416 case SSL3_ST_CW_KEY_EXCH_B:
417 ret=ssl3_send_client_key_exchange(s);
418 if (ret <= 0) goto end;
419 /* EAY EAY EAY need to check for DH fix cert
420 * sent back */
421 /* For TLS, cert_req is set to 2, so a cert chain
422 * of nothing is sent, but no verify packet is sent */
423 /* XXX: For now, we do not support client
424 * authentication in ECDH cipher suites with
425 * ECDH (rather than ECDSA) certificates.
426 * We need to skip the certificate verify
427 * message when client's ECDH public key is sent
428 * inside the client certificate.
429 */
430 if (s->s3->tmp.cert_req == 1)
431 {
432 s->state=SSL3_ST_CW_CERT_VRFY_A;
433 }
434 else
435 {
436 s->state=SSL3_ST_CW_CHANGE_A;
437 s->s3->change_cipher_spec=0;
438 }
439 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
440 {
441 s->state=SSL3_ST_CW_CHANGE_A;
442 s->s3->change_cipher_spec=0;
443 }
444
445 s->init_num=0;
446 break;
447
448 case SSL3_ST_CW_CERT_VRFY_A:
449 case SSL3_ST_CW_CERT_VRFY_B:
450 ret=ssl3_send_client_verify(s);
451 if (ret <= 0) goto end;
452 s->state=SSL3_ST_CW_CHANGE_A;
453 s->init_num=0;
454 s->s3->change_cipher_spec=0;
455 break;
456
457 case SSL3_ST_CW_CHANGE_A:
458 case SSL3_ST_CW_CHANGE_B:
459 ret=ssl3_send_change_cipher_spec(s,
460 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
461 if (ret <= 0) goto end;
462
463 #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
464 s->state=SSL3_ST_CW_FINISHED_A;
465 #else
466 if (s->s3->next_proto_neg_seen)
467 s->state=SSL3_ST_CW_NEXT_PROTO_A;
468 else
469 s->state=SSL3_ST_CW_FINISHED_A;
470 #endif
471 s->init_num=0;
472
473 s->session->cipher=s->s3->tmp.new_cipher;
474 #ifdef OPENSSL_NO_COMP
475 s->session->compress_meth=0;
476 #else
477 if (s->s3->tmp.new_compression == NULL)
478 s->session->compress_meth=0;
479 else
480 s->session->compress_meth=
481 s->s3->tmp.new_compression->id;
482 #endif
483 if (!s->method->ssl3_enc->setup_key_block(s))
484 {
485 ret= -1;
486 goto end;
487 }
488
489 if (!s->method->ssl3_enc->change_cipher_state(s,
490 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
491 {
492 ret= -1;
493 goto end;
494 }
495
496 break;
497
498 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
499 case SSL3_ST_CW_NEXT_PROTO_A:
500 case SSL3_ST_CW_NEXT_PROTO_B:
501 ret=ssl3_send_next_proto(s);
502 if (ret <= 0) goto end;
503 s->state=SSL3_ST_CW_FINISHED_A;
504 break;
505 #endif
506
507 case SSL3_ST_CW_FINISHED_A:
508 case SSL3_ST_CW_FINISHED_B:
509 ret=ssl3_send_finished(s,
510 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
511 s->method->ssl3_enc->client_finished_label,
512 s->method->ssl3_enc->client_finished_label_len);
513 if (ret <= 0) goto end;
514 s->state=SSL3_ST_CW_FLUSH;
515
516 /* clear flags */
517 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
518 if (s->hit)
519 {
520 s->s3->tmp.next_state=SSL_ST_OK;
521 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
522 {
523 s->state=SSL_ST_OK;
524 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
525 s->s3->delay_buf_pop_ret=0;
526 }
527 }
528 else
529 {
530 #ifndef OPENSSL_NO_TLSEXT
531 /* Allow NewSessionTicket if ticket expected */
532 if (s->tlsext_ticket_expected)
533 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
534 else
535 #endif
536
537 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
538 }
539 s->init_num=0;
540 break;
541
542 #ifndef OPENSSL_NO_TLSEXT
543 case SSL3_ST_CR_SESSION_TICKET_A:
544 case SSL3_ST_CR_SESSION_TICKET_B:
545 ret=ssl3_get_new_session_ticket(s);
546 if (ret <= 0) goto end;
547 s->state=SSL3_ST_CR_FINISHED_A;
548 s->init_num=0;
549 break;
550
551 case SSL3_ST_CR_CERT_STATUS_A:
552 case SSL3_ST_CR_CERT_STATUS_B:
553 ret=ssl3_get_cert_status(s);
554 if (ret <= 0) goto end;
555 s->state=SSL3_ST_CR_KEY_EXCH_A;
556 s->init_num=0;
557 break;
558 #endif
559
560 case SSL3_ST_CR_FINISHED_A:
561 case SSL3_ST_CR_FINISHED_B:
562
563 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
564 SSL3_ST_CR_FINISHED_B);
565 if (ret <= 0) goto end;
566
567 if (s->hit)
568 s->state=SSL3_ST_CW_CHANGE_A;
569 else
570 s->state=SSL_ST_OK;
571 s->init_num=0;
572 break;
573
574 case SSL3_ST_CW_FLUSH:
575 s->rwstate=SSL_WRITING;
576 if (BIO_flush(s->wbio) <= 0)
577 {
578 ret= -1;
579 goto end;
580 }
581 s->rwstate=SSL_NOTHING;
582 s->state=s->s3->tmp.next_state;
583 break;
584
585 case SSL_ST_OK:
586 /* clean a few things up */
587 ssl3_cleanup_key_block(s);
588
589 if (s->init_buf != NULL)
590 {
591 BUF_MEM_free(s->init_buf);
592 s->init_buf=NULL;
593 }
594
595 /* If we are not 'joining' the last two packets,
596 * remove the buffering now */
597 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
598 ssl_free_wbio_buffer(s);
599 /* else do it later in ssl3_write */
600
601 s->init_num=0;
602 s->renegotiate=0;
603 s->new_session=0;
604
605 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
606 if (s->hit) s->ctx->stats.sess_hit++;
607
608 ret=1;
609 /* s->server=0; */
610 s->handshake_func=ssl3_connect;
611 s->ctx->stats.sess_connect_good++;
612
613 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
614
615 goto end;
616 /* break; */
617
618 default:
619 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
620 ret= -1;
621 goto end;
622 /* break; */
623 }
624
625 /* did we do anything */
626 if (!s->s3->tmp.reuse_message && !skip)
627 {
628 if (s->debug)
629 {
630 if ((ret=BIO_flush(s->wbio)) <= 0)
631 goto end;
632 }
633
634 if ((cb != NULL) && (s->state != state))
635 {
636 new_state=s->state;
637 s->state=state;
638 cb(s,SSL_CB_CONNECT_LOOP,1);
639 s->state=new_state;
640 }
641 }
642 skip=0;
643 }
644 end:
645 s->in_handshake--;
646 if (buf != NULL)
647 BUF_MEM_free(buf);
648 if (cb != NULL)
649 cb(s,SSL_CB_CONNECT_EXIT,ret);
650 return(ret);
651 }
652
653
654 int ssl3_client_hello(SSL *s)
655 {
656 unsigned char *buf;
657 unsigned char *p,*d;
658 int i;
659 unsigned long Time,l;
660 #ifndef OPENSSL_NO_COMP
661 int j;
662 SSL_COMP *comp;
663 #endif
664
665 buf=(unsigned char *)s->init_buf->data;
666 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
667 {
668 SSL_SESSION *sess = s->session;
669 if ((sess == NULL) ||
670 (sess->ssl_version != s->version) ||
671 #ifdef OPENSSL_NO_TLSEXT
672 !sess->session_id_length ||
673 #else
674 (!sess->session_id_length && !sess->tlsext_tick) ||
675 #endif
676 (sess->not_resumable))
677 {
678 if (!ssl_get_new_session(s,0))
679 goto err;
680 }
681 /* else use the pre-loaded session */
682
683 p=s->s3->client_random;
684 Time=(unsigned long)time(NULL); /* Time */
685 l2n(Time,p);
686 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
687 goto err;
688
689 /* Do the message type and length last */
690 d=p= &(buf[4]);
691
692 /* version indicates the negotiated version: for example from
693 * an SSLv2/v3 compatible client hello). The client_version
694 * field is the maximum version we permit and it is also
695 * used in RSA encrypted premaster secrets. Some servers can
696 * choke if we initially report a higher version then
697 * renegotiate to a lower one in the premaster secret. This
698 * didn't happen with TLS 1.0 as most servers supported it
699 * but it can with TLS 1.1 or later if the server only supports
700 * 1.0.
701 *
702 * Possible scenario with previous logic:
703 * 1. Client hello indicates TLS 1.2
704 * 2. Server hello says TLS 1.0
705 * 3. RSA encrypted premaster secret uses 1.2.
706 * 4. Handhaked proceeds using TLS 1.0.
707 * 5. Server sends hello request to renegotiate.
708 * 6. Client hello indicates TLS v1.0 as we now
709 * know that is maximum server supports.
710 * 7. Server chokes on RSA encrypted premaster secret
711 * containing version 1.0.
712 *
713 * For interoperability it should be OK to always use the
714 * maximum version we support in client hello and then rely
715 * on the checking of version to ensure the servers isn't
716 * being inconsistent: for example initially negotiating with
717 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
718 * client_version in client hello and not resetting it to
719 * the negotiated version.
720 */
721 #if 0
722 *(p++)=s->version>>8;
723 *(p++)=s->version&0xff;
724 s->client_version=s->version;
725 #else
726 *(p++)=s->client_version>>8;
727 *(p++)=s->client_version&0xff;
728 #endif
729
730 /* Random stuff */
731 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
732 p+=SSL3_RANDOM_SIZE;
733
734 /* Session ID */
735 if (s->new_session)
736 i=0;
737 else
738 i=s->session->session_id_length;
739 *(p++)=i;
740 if (i != 0)
741 {
742 if (i > (int)sizeof(s->session->session_id))
743 {
744 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
745 goto err;
746 }
747 memcpy(p,s->session->session_id,i);
748 p+=i;
749 }
750
751 /* Ciphers supported */
752 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
753 if (i == 0)
754 {
755 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
756 goto err;
757 }
758 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
759 /* Some servers hang if client hello > 256 bytes
760 * as hack workaround chop number of supported ciphers
761 * to keep it well below this if we use TLS v1.2
762 */
763 if (TLS1_get_version(s) >= TLS1_2_VERSION
764 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
765 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
766 #endif
767 s2n(i,p);
768 p+=i;
769
770 /* COMPRESSION */
771 #ifdef OPENSSL_NO_COMP
772 *(p++)=1;
773 #else
774
775 if ((s->options & SSL_OP_NO_COMPRESSION)
776 || !s->ctx->comp_methods)
777 j=0;
778 else
779 j=sk_SSL_COMP_num(s->ctx->comp_methods);
780 *(p++)=1+j;
781 for (i=0; i<j; i++)
782 {
783 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
784 *(p++)=comp->id;
785 }
786 #endif
787 *(p++)=0; /* Add the NULL method */
788
789 #ifndef OPENSSL_NO_TLSEXT
790 /* TLS extensions*/
791 if (ssl_prepare_clienthello_tlsext(s) <= 0)
792 {
793 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
794 goto err;
795 }
796 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
797 {
798 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
799 goto err;
800 }
801 #endif
802
803 l=(p-d);
804 d=buf;
805 *(d++)=SSL3_MT_CLIENT_HELLO;
806 l2n3(l,d);
807
808 s->state=SSL3_ST_CW_CLNT_HELLO_B;
809 /* number of bytes to write */
810 s->init_num=p-buf;
811 s->init_off=0;
812 }
813
814 /* SSL3_ST_CW_CLNT_HELLO_B */
815 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
816 err:
817 return(-1);
818 }
819
820 int ssl3_get_server_hello(SSL *s)
821 {
822 STACK_OF(SSL_CIPHER) *sk;
823 const SSL_CIPHER *c;
824 unsigned char *p,*d;
825 int i,al,ok;
826 unsigned int j;
827 long n;
828 #ifndef OPENSSL_NO_COMP
829 SSL_COMP *comp;
830 #endif
831
832 n=s->method->ssl_get_message(s,
833 SSL3_ST_CR_SRVR_HELLO_A,
834 SSL3_ST_CR_SRVR_HELLO_B,
835 -1,
836 20000, /* ?? */
837 &ok);
838
839 if (!ok) return((int)n);
840
841 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
842 {
843 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
844 {
845 if ( s->d1->send_cookie == 0)
846 {
847 s->s3->tmp.reuse_message = 1;
848 return 1;
849 }
850 else /* already sent a cookie */
851 {
852 al=SSL_AD_UNEXPECTED_MESSAGE;
853 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
854 goto f_err;
855 }
856 }
857 }
858
859 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
860 {
861 al=SSL_AD_UNEXPECTED_MESSAGE;
862 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
863 goto f_err;
864 }
865
866 d=p=(unsigned char *)s->init_msg;
867
868 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
869 {
870 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
871 s->version=(s->version&0xff00)|p[1];
872 al=SSL_AD_PROTOCOL_VERSION;
873 goto f_err;
874 }
875 p+=2;
876
877 /* load the server hello data */
878 /* load the server random */
879 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
880 p+=SSL3_RANDOM_SIZE;
881
882 /* get the session-id */
883 j= *(p++);
884
885 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
886 {
887 al=SSL_AD_ILLEGAL_PARAMETER;
888 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
889 goto f_err;
890 }
891
892 #ifndef OPENSSL_NO_TLSEXT
893 /* check if we want to resume the session based on external pre-shared secret */
894 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
895 {
896 SSL_CIPHER *pref_cipher=NULL;
897 s->session->master_key_length=sizeof(s->session->master_key);
898 if (s->tls_session_secret_cb(s, s->session->master_key,
899 &s->session->master_key_length,
900 NULL, &pref_cipher,
901 s->tls_session_secret_cb_arg))
902 {
903 s->session->cipher = pref_cipher ?
904 pref_cipher : ssl_get_cipher_by_char(s, p+j);
905 }
906 }
907 #endif /* OPENSSL_NO_TLSEXT */
908
909 if (j != 0 && j == s->session->session_id_length
910 && memcmp(p,s->session->session_id,j) == 0)
911 {
912 if(s->sid_ctx_length != s->session->sid_ctx_length
913 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
914 {
915 /* actually a client application bug */
916 al=SSL_AD_ILLEGAL_PARAMETER;
917 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
918 goto f_err;
919 }
920 s->hit=1;
921 }
922 else /* a miss or crap from the other end */
923 {
924 /* If we were trying for session-id reuse, make a new
925 * SSL_SESSION so we don't stuff up other people */
926 s->hit=0;
927 if (s->session->session_id_length > 0)
928 {
929 if (!ssl_get_new_session(s,0))
930 {
931 al=SSL_AD_INTERNAL_ERROR;
932 goto f_err;
933 }
934 }
935 s->session->session_id_length=j;
936 memcpy(s->session->session_id,p,j); /* j could be 0 */
937 }
938 p+=j;
939 c=ssl_get_cipher_by_char(s,p);
940 if (c == NULL)
941 {
942 /* unknown cipher */
943 al=SSL_AD_ILLEGAL_PARAMETER;
944 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
945 goto f_err;
946 }
947 /* TLS v1.2 only ciphersuites require v1.2 or later */
948 if ((c->algorithm_ssl & SSL_TLSV1_2) &&
949 (TLS1_get_version(s) < TLS1_2_VERSION))
950 {
951 al=SSL_AD_ILLEGAL_PARAMETER;
952 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
953 goto f_err;
954 }
955 p+=ssl_put_cipher_by_char(s,NULL,NULL);
956
957 sk=ssl_get_ciphers_by_id(s);
958 i=sk_SSL_CIPHER_find(sk,c);
959 if (i < 0)
960 {
961 /* we did not say we would use this cipher */
962 al=SSL_AD_ILLEGAL_PARAMETER;
963 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
964 goto f_err;
965 }
966
967 /* Depending on the session caching (internal/external), the cipher
968 and/or cipher_id values may not be set. Make sure that
969 cipher_id is set and use it for comparison. */
970 if (s->session->cipher)
971 s->session->cipher_id = s->session->cipher->id;
972 if (s->hit && (s->session->cipher_id != c->id))
973 {
974 /* Workaround is now obsolete */
975 #if 0
976 if (!(s->options &
977 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
978 #endif
979 {
980 al=SSL_AD_ILLEGAL_PARAMETER;
981 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
982 goto f_err;
983 }
984 }
985 s->s3->tmp.new_cipher=c;
986 /* Don't digest cached records if TLS v1.2: we may need them for
987 * client authentication.
988 */
989 if (TLS1_get_version(s) < TLS1_2_VERSION && !ssl3_digest_cached_records(s))
990 goto f_err;
991 /* lets get the compression algorithm */
992 /* COMPRESSION */
993 #ifdef OPENSSL_NO_COMP
994 if (*(p++) != 0)
995 {
996 al=SSL_AD_ILLEGAL_PARAMETER;
997 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
998 goto f_err;
999 }
1000 /* If compression is disabled we'd better not try to resume a session
1001 * using compression.
1002 */
1003 if (s->session->compress_meth != 0)
1004 {
1005 al=SSL_AD_INTERNAL_ERROR;
1006 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1007 goto f_err;
1008 }
1009 #else
1010 j= *(p++);
1011 if (s->hit && j != s->session->compress_meth)
1012 {
1013 al=SSL_AD_ILLEGAL_PARAMETER;
1014 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1015 goto f_err;
1016 }
1017 if (j == 0)
1018 comp=NULL;
1019 else if (s->options & SSL_OP_NO_COMPRESSION)
1020 {
1021 al=SSL_AD_ILLEGAL_PARAMETER;
1022 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1023 goto f_err;
1024 }
1025 else
1026 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1027
1028 if ((j != 0) && (comp == NULL))
1029 {
1030 al=SSL_AD_ILLEGAL_PARAMETER;
1031 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1032 goto f_err;
1033 }
1034 else
1035 {
1036 s->s3->tmp.new_compression=comp;
1037 }
1038 #endif
1039
1040 #ifndef OPENSSL_NO_TLSEXT
1041 /* TLS extensions*/
1042 if (s->version >= SSL3_VERSION)
1043 {
1044 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al))
1045 {
1046 /* 'al' set by ssl_parse_serverhello_tlsext */
1047 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1048 goto f_err;
1049 }
1050 if (ssl_check_serverhello_tlsext(s) <= 0)
1051 {
1052 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT);
1053 goto err;
1054 }
1055 }
1056 #endif
1057
1058 if (p != (d+n))
1059 {
1060 /* wrong packet length */
1061 al=SSL_AD_DECODE_ERROR;
1062 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1063 goto f_err;
1064 }
1065
1066 return(1);
1067 f_err:
1068 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1069 err:
1070 return(-1);
1071 }
1072
1073 int ssl3_get_server_certificate(SSL *s)
1074 {
1075 int al,i,ok,ret= -1;
1076 unsigned long n,nc,llen,l;
1077 X509 *x=NULL;
1078 const unsigned char *q,*p;
1079 unsigned char *d;
1080 STACK_OF(X509) *sk=NULL;
1081 SESS_CERT *sc;
1082 EVP_PKEY *pkey=NULL;
1083 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1084
1085 n=s->method->ssl_get_message(s,
1086 SSL3_ST_CR_CERT_A,
1087 SSL3_ST_CR_CERT_B,
1088 -1,
1089 s->max_cert_list,
1090 &ok);
1091
1092 if (!ok) return((int)n);
1093
1094 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1095 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1096 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1097 {
1098 s->s3->tmp.reuse_message=1;
1099 return(1);
1100 }
1101
1102 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1103 {
1104 al=SSL_AD_UNEXPECTED_MESSAGE;
1105 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1106 goto f_err;
1107 }
1108 p=d=(unsigned char *)s->init_msg;
1109
1110 if ((sk=sk_X509_new_null()) == NULL)
1111 {
1112 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1113 goto err;
1114 }
1115
1116 n2l3(p,llen);
1117 if (llen+3 != n)
1118 {
1119 al=SSL_AD_DECODE_ERROR;
1120 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1121 goto f_err;
1122 }
1123 for (nc=0; nc<llen; )
1124 {
1125 n2l3(p,l);
1126 if ((l+nc+3) > llen)
1127 {
1128 al=SSL_AD_DECODE_ERROR;
1129 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1130 goto f_err;
1131 }
1132
1133 q=p;
1134 x=d2i_X509(NULL,&q,l);
1135 if (x == NULL)
1136 {
1137 al=SSL_AD_BAD_CERTIFICATE;
1138 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1139 goto f_err;
1140 }
1141 if (q != (p+l))
1142 {
1143 al=SSL_AD_DECODE_ERROR;
1144 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1145 goto f_err;
1146 }
1147 if (!sk_X509_push(sk,x))
1148 {
1149 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1150 goto err;
1151 }
1152 x=NULL;
1153 nc+=l+3;
1154 p=q;
1155 }
1156
1157 i=ssl_verify_cert_chain(s,sk);
1158 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1159 #ifndef OPENSSL_NO_KRB5
1160 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1161 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1162 #endif /* OPENSSL_NO_KRB5 */
1163 )
1164 {
1165 al=ssl_verify_alarm_type(s->verify_result);
1166 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1167 goto f_err;
1168 }
1169 ERR_clear_error(); /* but we keep s->verify_result */
1170
1171 sc=ssl_sess_cert_new();
1172 if (sc == NULL) goto err;
1173
1174 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1175 s->session->sess_cert=sc;
1176
1177 sc->cert_chain=sk;
1178 /* Inconsistency alert: cert_chain does include the peer's
1179 * certificate, which we don't include in s3_srvr.c */
1180 x=sk_X509_value(sk,0);
1181 sk=NULL;
1182 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1183
1184 pkey=X509_get_pubkey(x);
1185
1186 /* VRS: allow null cert if auth == KRB5 */
1187 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1188 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1189 ? 0 : 1;
1190
1191 #ifdef KSSL_DEBUG
1192 printf("pkey,x = %p, %p\n", pkey,x);
1193 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1194 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1195 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1196 #endif /* KSSL_DEBUG */
1197
1198 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1199 {
1200 x=NULL;
1201 al=SSL3_AL_FATAL;
1202 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1203 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1204 goto f_err;
1205 }
1206
1207 i=ssl_cert_type(x,pkey);
1208 if (need_cert && i < 0)
1209 {
1210 x=NULL;
1211 al=SSL3_AL_FATAL;
1212 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1213 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1214 goto f_err;
1215 }
1216
1217 if (need_cert)
1218 {
1219 sc->peer_cert_type=i;
1220 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1221 /* Why would the following ever happen?
1222 * We just created sc a couple of lines ago. */
1223 if (sc->peer_pkeys[i].x509 != NULL)
1224 X509_free(sc->peer_pkeys[i].x509);
1225 sc->peer_pkeys[i].x509=x;
1226 sc->peer_key= &(sc->peer_pkeys[i]);
1227
1228 if (s->session->peer != NULL)
1229 X509_free(s->session->peer);
1230 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1231 s->session->peer=x;
1232 }
1233 else
1234 {
1235 sc->peer_cert_type=i;
1236 sc->peer_key= NULL;
1237
1238 if (s->session->peer != NULL)
1239 X509_free(s->session->peer);
1240 s->session->peer=NULL;
1241 }
1242 s->session->verify_result = s->verify_result;
1243
1244 x=NULL;
1245 ret=1;
1246
1247 if (0)
1248 {
1249 f_err:
1250 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1251 }
1252 err:
1253 EVP_PKEY_free(pkey);
1254 X509_free(x);
1255 sk_X509_pop_free(sk,X509_free);
1256 return(ret);
1257 }
1258
1259 int ssl3_get_key_exchange(SSL *s)
1260 {
1261 #ifndef OPENSSL_NO_RSA
1262 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1263 #endif
1264 EVP_MD_CTX md_ctx;
1265 unsigned char *param,*p;
1266 int al,i,j,param_len,ok;
1267 long n,alg_k,alg_a;
1268 EVP_PKEY *pkey=NULL;
1269 const EVP_MD *md = NULL;
1270 #ifndef OPENSSL_NO_RSA
1271 RSA *rsa=NULL;
1272 #endif
1273 #ifndef OPENSSL_NO_DH
1274 DH *dh=NULL;
1275 #endif
1276 #ifndef OPENSSL_NO_ECDH
1277 EC_KEY *ecdh = NULL;
1278 BN_CTX *bn_ctx = NULL;
1279 EC_POINT *srvr_ecpoint = NULL;
1280 int curve_nid = 0;
1281 int encoded_pt_len = 0;
1282 #endif
1283
1284 /* use same message size as in ssl3_get_certificate_request()
1285 * as ServerKeyExchange message may be skipped */
1286 n=s->method->ssl_get_message(s,
1287 SSL3_ST_CR_KEY_EXCH_A,
1288 SSL3_ST_CR_KEY_EXCH_B,
1289 -1,
1290 s->max_cert_list,
1291 &ok);
1292 if (!ok) return((int)n);
1293
1294 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1295 {
1296 #ifndef OPENSSL_NO_PSK
1297 /* In plain PSK ciphersuite, ServerKeyExchange can be
1298 omitted if no identity hint is sent. Set
1299 session->sess_cert anyway to avoid problems
1300 later.*/
1301 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1302 {
1303 s->session->sess_cert=ssl_sess_cert_new();
1304 if (s->ctx->psk_identity_hint)
1305 OPENSSL_free(s->ctx->psk_identity_hint);
1306 s->ctx->psk_identity_hint = NULL;
1307 }
1308 #endif
1309 s->s3->tmp.reuse_message=1;
1310 return(1);
1311 }
1312
1313 param=p=(unsigned char *)s->init_msg;
1314 if (s->session->sess_cert != NULL)
1315 {
1316 #ifndef OPENSSL_NO_RSA
1317 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1318 {
1319 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1320 s->session->sess_cert->peer_rsa_tmp=NULL;
1321 }
1322 #endif
1323 #ifndef OPENSSL_NO_DH
1324 if (s->session->sess_cert->peer_dh_tmp)
1325 {
1326 DH_free(s->session->sess_cert->peer_dh_tmp);
1327 s->session->sess_cert->peer_dh_tmp=NULL;
1328 }
1329 #endif
1330 #ifndef OPENSSL_NO_ECDH
1331 if (s->session->sess_cert->peer_ecdh_tmp)
1332 {
1333 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1334 s->session->sess_cert->peer_ecdh_tmp=NULL;
1335 }
1336 #endif
1337 }
1338 else
1339 {
1340 s->session->sess_cert=ssl_sess_cert_new();
1341 }
1342
1343 param_len=0;
1344 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1345 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1346 EVP_MD_CTX_init(&md_ctx);
1347
1348 #ifndef OPENSSL_NO_PSK
1349 if (alg_k & SSL_kPSK)
1350 {
1351 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1352
1353 al=SSL_AD_HANDSHAKE_FAILURE;
1354 n2s(p,i);
1355 param_len=i+2;
1356 /* Store PSK identity hint for later use, hint is used
1357 * in ssl3_send_client_key_exchange. Assume that the
1358 * maximum length of a PSK identity hint can be as
1359 * long as the maximum length of a PSK identity. */
1360 if (i > PSK_MAX_IDENTITY_LEN)
1361 {
1362 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1363 SSL_R_DATA_LENGTH_TOO_LONG);
1364 goto f_err;
1365 }
1366 if (param_len > n)
1367 {
1368 al=SSL_AD_DECODE_ERROR;
1369 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1370 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1371 goto f_err;
1372 }
1373 /* If received PSK identity hint contains NULL
1374 * characters, the hint is truncated from the first
1375 * NULL. p may not be ending with NULL, so create a
1376 * NULL-terminated string. */
1377 memcpy(tmp_id_hint, p, i);
1378 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1379 if (s->ctx->psk_identity_hint != NULL)
1380 OPENSSL_free(s->ctx->psk_identity_hint);
1381 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1382 if (s->ctx->psk_identity_hint == NULL)
1383 {
1384 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1385 goto f_err;
1386 }
1387
1388 p+=i;
1389 n-=param_len;
1390 }
1391 else
1392 #endif /* !OPENSSL_NO_PSK */
1393 #ifndef OPENSSL_NO_SRP
1394 if (alg_k & SSL_kSRP)
1395 {
1396 n2s(p,i);
1397 param_len=i+2;
1398 if (param_len > n)
1399 {
1400 al=SSL_AD_DECODE_ERROR;
1401 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1402 goto f_err;
1403 }
1404 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1405 {
1406 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1407 goto err;
1408 }
1409 p+=i;
1410
1411 n2s(p,i);
1412 param_len+=i+2;
1413 if (param_len > n)
1414 {
1415 al=SSL_AD_DECODE_ERROR;
1416 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1417 goto f_err;
1418 }
1419 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1420 {
1421 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1422 goto err;
1423 }
1424 p+=i;
1425
1426 i = (unsigned int)(p[0]);
1427 p++;
1428 param_len+=i+1;
1429 if (param_len > n)
1430 {
1431 al=SSL_AD_DECODE_ERROR;
1432 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1433 goto f_err;
1434 }
1435 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1436 {
1437 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1438 goto err;
1439 }
1440 p+=i;
1441
1442 n2s(p,i);
1443 param_len+=i+2;
1444 if (param_len > n)
1445 {
1446 al=SSL_AD_DECODE_ERROR;
1447 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1448 goto f_err;
1449 }
1450 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1451 {
1452 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1453 goto err;
1454 }
1455 p+=i;
1456 n-=param_len;
1457
1458 /* We must check if there is a certificate */
1459 #ifndef OPENSSL_NO_RSA
1460 if (alg_a & SSL_aRSA)
1461 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1462 #else
1463 if (0)
1464 ;
1465 #endif
1466 #ifndef OPENSSL_NO_DSA
1467 else if (alg_a & SSL_aDSS)
1468 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1469 #endif
1470 }
1471 else
1472 #endif /* !OPENSSL_NO_SRP */
1473 #ifndef OPENSSL_NO_RSA
1474 if (alg_k & SSL_kRSA)
1475 {
1476 if ((rsa=RSA_new()) == NULL)
1477 {
1478 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1479 goto err;
1480 }
1481 n2s(p,i);
1482 param_len=i+2;
1483 if (param_len > n)
1484 {
1485 al=SSL_AD_DECODE_ERROR;
1486 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1487 goto f_err;
1488 }
1489 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1490 {
1491 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1492 goto err;
1493 }
1494 p+=i;
1495
1496 n2s(p,i);
1497 param_len+=i+2;
1498 if (param_len > n)
1499 {
1500 al=SSL_AD_DECODE_ERROR;
1501 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1502 goto f_err;
1503 }
1504 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1505 {
1506 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1507 goto err;
1508 }
1509 p+=i;
1510 n-=param_len;
1511
1512 /* this should be because we are using an export cipher */
1513 if (alg_a & SSL_aRSA)
1514 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1515 else
1516 {
1517 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1518 goto err;
1519 }
1520 s->session->sess_cert->peer_rsa_tmp=rsa;
1521 rsa=NULL;
1522 }
1523 #else /* OPENSSL_NO_RSA */
1524 if (0)
1525 ;
1526 #endif
1527 #ifndef OPENSSL_NO_DH
1528 else if (alg_k & SSL_kEDH)
1529 {
1530 if ((dh=DH_new()) == NULL)
1531 {
1532 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1533 goto err;
1534 }
1535 n2s(p,i);
1536 param_len=i+2;
1537 if (param_len > n)
1538 {
1539 al=SSL_AD_DECODE_ERROR;
1540 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1541 goto f_err;
1542 }
1543 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1544 {
1545 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1546 goto err;
1547 }
1548 p+=i;
1549
1550 n2s(p,i);
1551 param_len+=i+2;
1552 if (param_len > n)
1553 {
1554 al=SSL_AD_DECODE_ERROR;
1555 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1556 goto f_err;
1557 }
1558 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1559 {
1560 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1561 goto err;
1562 }
1563 p+=i;
1564
1565 n2s(p,i);
1566 param_len+=i+2;
1567 if (param_len > n)
1568 {
1569 al=SSL_AD_DECODE_ERROR;
1570 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1571 goto f_err;
1572 }
1573 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1574 {
1575 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1576 goto err;
1577 }
1578 p+=i;
1579 n-=param_len;
1580
1581 #ifndef OPENSSL_NO_RSA
1582 if (alg_a & SSL_aRSA)
1583 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1584 #else
1585 if (0)
1586 ;
1587 #endif
1588 #ifndef OPENSSL_NO_DSA
1589 else if (alg_a & SSL_aDSS)
1590 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1591 #endif
1592 /* else anonymous DH, so no certificate or pkey. */
1593
1594 s->session->sess_cert->peer_dh_tmp=dh;
1595 dh=NULL;
1596 }
1597 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1598 {
1599 al=SSL_AD_ILLEGAL_PARAMETER;
1600 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1601 goto f_err;
1602 }
1603 #endif /* !OPENSSL_NO_DH */
1604
1605 #ifndef OPENSSL_NO_ECDH
1606 else if (alg_k & SSL_kEECDH)
1607 {
1608 EC_GROUP *ngroup;
1609 const EC_GROUP *group;
1610
1611 if ((ecdh=EC_KEY_new()) == NULL)
1612 {
1613 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1614 goto err;
1615 }
1616
1617 /* Extract elliptic curve parameters and the
1618 * server's ephemeral ECDH public key.
1619 * Keep accumulating lengths of various components in
1620 * param_len and make sure it never exceeds n.
1621 */
1622
1623 /* XXX: For now we only support named (not generic) curves
1624 * and the ECParameters in this case is just three bytes.
1625 */
1626 param_len=3;
1627 if ((param_len > n) ||
1628 (*p != NAMED_CURVE_TYPE) ||
1629 ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0))
1630 {
1631 al=SSL_AD_INTERNAL_ERROR;
1632 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1633 goto f_err;
1634 }
1635
1636 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1637 if (ngroup == NULL)
1638 {
1639 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1640 goto err;
1641 }
1642 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1643 {
1644 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1645 goto err;
1646 }
1647 EC_GROUP_free(ngroup);
1648
1649 group = EC_KEY_get0_group(ecdh);
1650
1651 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1652 (EC_GROUP_get_degree(group) > 163))
1653 {
1654 al=SSL_AD_EXPORT_RESTRICTION;
1655 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1656 goto f_err;
1657 }
1658
1659 p+=3;
1660
1661 /* Next, get the encoded ECPoint */
1662 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1663 ((bn_ctx = BN_CTX_new()) == NULL))
1664 {
1665 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1666 goto err;
1667 }
1668
1669 encoded_pt_len = *p; /* length of encoded point */
1670 p+=1;
1671 param_len += (1 + encoded_pt_len);
1672 if ((param_len > n) ||
1673 (EC_POINT_oct2point(group, srvr_ecpoint,
1674 p, encoded_pt_len, bn_ctx) == 0))
1675 {
1676 al=SSL_AD_DECODE_ERROR;
1677 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1678 goto f_err;
1679 }
1680
1681 n-=param_len;
1682 p+=encoded_pt_len;
1683
1684 /* The ECC/TLS specification does not mention
1685 * the use of DSA to sign ECParameters in the server
1686 * key exchange message. We do support RSA and ECDSA.
1687 */
1688 if (0) ;
1689 #ifndef OPENSSL_NO_RSA
1690 else if (alg_a & SSL_aRSA)
1691 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1692 #endif
1693 #ifndef OPENSSL_NO_ECDSA
1694 else if (alg_a & SSL_aECDSA)
1695 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1696 #endif
1697 /* else anonymous ECDH, so no certificate or pkey. */
1698 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1699 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1700 ecdh=NULL;
1701 BN_CTX_free(bn_ctx);
1702 bn_ctx = NULL;
1703 EC_POINT_free(srvr_ecpoint);
1704 srvr_ecpoint = NULL;
1705 }
1706 else if (alg_k)
1707 {
1708 al=SSL_AD_UNEXPECTED_MESSAGE;
1709 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1710 goto f_err;
1711 }
1712 #endif /* !OPENSSL_NO_ECDH */
1713
1714
1715 /* p points to the next byte, there are 'n' bytes left */
1716
1717 /* if it was signed, check the signature */
1718 if (pkey != NULL)
1719 {
1720 if (TLS1_get_version(s) >= TLS1_2_VERSION)
1721 {
1722 int sigalg = tls12_get_sigid(pkey);
1723 /* Should never happen */
1724 if (sigalg == -1)
1725 {
1726 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1727 goto err;
1728 }
1729 /* Check key type is consistent with signature */
1730 if (sigalg != (int)p[1])
1731 {
1732 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_TYPE);
1733 al=SSL_AD_DECODE_ERROR;
1734 goto f_err;
1735 }
1736 md = tls12_get_hash(p[0]);
1737 if (md == NULL)
1738 {
1739 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNKNOWN_DIGEST);
1740 al=SSL_AD_DECODE_ERROR;
1741 goto f_err;
1742 }
1743 #ifdef SSL_DEBUG
1744 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1745 #endif
1746 p += 2;
1747 n -= 2;
1748 }
1749 else
1750 md = EVP_sha1();
1751
1752 n2s(p,i);
1753 n-=2;
1754 j=EVP_PKEY_size(pkey);
1755
1756 if ((i != n) || (n > j) || (n <= 0))
1757 {
1758 /* wrong packet length */
1759 al=SSL_AD_DECODE_ERROR;
1760 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1761 goto f_err;
1762 }
1763
1764 #ifndef OPENSSL_NO_RSA
1765 if (pkey->type == EVP_PKEY_RSA && TLS1_get_version(s) < TLS1_2_VERSION)
1766 {
1767 int num;
1768
1769 j=0;
1770 q=md_buf;
1771 for (num=2; num > 0; num--)
1772 {
1773 EVP_MD_CTX_set_flags(&md_ctx,
1774 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1775 EVP_DigestInit_ex(&md_ctx,(num == 2)
1776 ?s->ctx->md5:s->ctx->sha1, NULL);
1777 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1778 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1779 EVP_DigestUpdate(&md_ctx,param,param_len);
1780 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1781 q+=i;
1782 j+=i;
1783 }
1784 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1785 pkey->pkey.rsa);
1786 if (i < 0)
1787 {
1788 al=SSL_AD_DECRYPT_ERROR;
1789 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1790 goto f_err;
1791 }
1792 if (i == 0)
1793 {
1794 /* bad signature */
1795 al=SSL_AD_DECRYPT_ERROR;
1796 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1797 goto f_err;
1798 }
1799 }
1800 else
1801 #endif
1802 {
1803 EVP_VerifyInit_ex(&md_ctx, md, NULL);
1804 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1805 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1806 EVP_VerifyUpdate(&md_ctx,param,param_len);
1807 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1808 {
1809 /* bad signature */
1810 al=SSL_AD_DECRYPT_ERROR;
1811 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1812 goto f_err;
1813 }
1814 }
1815 }
1816 else
1817 {
1818 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
1819 /* aNULL or kPSK do not need public keys */
1820 {
1821 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1822 goto err;
1823 }
1824 /* still data left over */
1825 if (n != 0)
1826 {
1827 al=SSL_AD_DECODE_ERROR;
1828 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1829 goto f_err;
1830 }
1831 }
1832 EVP_PKEY_free(pkey);
1833 EVP_MD_CTX_cleanup(&md_ctx);
1834 return(1);
1835 f_err:
1836 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1837 err:
1838 EVP_PKEY_free(pkey);
1839 #ifndef OPENSSL_NO_RSA
1840 if (rsa != NULL)
1841 RSA_free(rsa);
1842 #endif
1843 #ifndef OPENSSL_NO_DH
1844 if (dh != NULL)
1845 DH_free(dh);
1846 #endif
1847 #ifndef OPENSSL_NO_ECDH
1848 BN_CTX_free(bn_ctx);
1849 EC_POINT_free(srvr_ecpoint);
1850 if (ecdh != NULL)
1851 EC_KEY_free(ecdh);
1852 #endif
1853 EVP_MD_CTX_cleanup(&md_ctx);
1854 return(-1);
1855 }
1856
1857 int ssl3_get_certificate_request(SSL *s)
1858 {
1859 int ok,ret=0;
1860 unsigned long n,nc,l;
1861 unsigned int llen, ctype_num,i;
1862 X509_NAME *xn=NULL;
1863 const unsigned char *p,*q;
1864 unsigned char *d;
1865 STACK_OF(X509_NAME) *ca_sk=NULL;
1866
1867 n=s->method->ssl_get_message(s,
1868 SSL3_ST_CR_CERT_REQ_A,
1869 SSL3_ST_CR_CERT_REQ_B,
1870 -1,
1871 s->max_cert_list,
1872 &ok);
1873
1874 if (!ok) return((int)n);
1875
1876 s->s3->tmp.cert_req=0;
1877
1878 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1879 {
1880 s->s3->tmp.reuse_message=1;
1881 /* If we get here we don't need any cached handshake records
1882 * as we wont be doing client auth.
1883 */
1884 if (s->s3->handshake_buffer)
1885 {
1886 if (!ssl3_digest_cached_records(s))
1887 goto err;
1888 }
1889 return(1);
1890 }
1891
1892 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1893 {
1894 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1895 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1896 goto err;
1897 }
1898
1899 /* TLS does not like anon-DH with client cert */
1900 if (s->version > SSL3_VERSION)
1901 {
1902 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
1903 {
1904 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1905 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1906 goto err;
1907 }
1908 }
1909
1910 p=d=(unsigned char *)s->init_msg;
1911
1912 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1913 {
1914 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1915 goto err;
1916 }
1917
1918 /* get the certificate types */
1919 ctype_num= *(p++);
1920 if (ctype_num > SSL3_CT_NUMBER)
1921 ctype_num=SSL3_CT_NUMBER;
1922 for (i=0; i<ctype_num; i++)
1923 s->s3->tmp.ctype[i]= p[i];
1924 p+=ctype_num;
1925 if (TLS1_get_version(s) >= TLS1_2_VERSION)
1926 {
1927 n2s(p, llen);
1928 /* Check we have enough room for signature algorithms and
1929 * following length value.
1930 */
1931 if ((unsigned long)(p - d + llen + 2) > n)
1932 {
1933 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1934 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
1935 goto err;
1936 }
1937 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen))
1938 {
1939 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1940 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
1941 goto err;
1942 }
1943 p += llen;
1944 }
1945
1946 /* get the CA RDNs */
1947 n2s(p,llen);
1948 #if 0
1949 {
1950 FILE *out;
1951 out=fopen("/tmp/vsign.der","w");
1952 fwrite(p,1,llen,out);
1953 fclose(out);
1954 }
1955 #endif
1956
1957 if ((unsigned long)(p - d + llen) != n)
1958 {
1959 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1960 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1961 goto err;
1962 }
1963
1964 for (nc=0; nc<llen; )
1965 {
1966 n2s(p,l);
1967 if ((l+nc+2) > llen)
1968 {
1969 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1970 goto cont; /* netscape bugs */
1971 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1972 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1973 goto err;
1974 }
1975
1976 q=p;
1977
1978 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1979 {
1980 /* If netscape tolerance is on, ignore errors */
1981 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1982 goto cont;
1983 else
1984 {
1985 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1986 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1987 goto err;
1988 }
1989 }
1990
1991 if (q != (p+l))
1992 {
1993 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1994 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1995 goto err;
1996 }
1997 if (!sk_X509_NAME_push(ca_sk,xn))
1998 {
1999 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2000 goto err;
2001 }
2002
2003 p+=l;
2004 nc+=l+2;
2005 }
2006
2007 if (0)
2008 {
2009 cont:
2010 ERR_clear_error();
2011 }
2012
2013 /* we should setup a certificate to return.... */
2014 s->s3->tmp.cert_req=1;
2015 s->s3->tmp.ctype_num=ctype_num;
2016 if (s->s3->tmp.ca_names != NULL)
2017 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2018 s->s3->tmp.ca_names=ca_sk;
2019 ca_sk=NULL;
2020
2021 ret=1;
2022 err:
2023 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2024 return(ret);
2025 }
2026
2027 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2028 {
2029 return(X509_NAME_cmp(*a,*b));
2030 }
2031 #ifndef OPENSSL_NO_TLSEXT
2032 int ssl3_get_new_session_ticket(SSL *s)
2033 {
2034 int ok,al,ret=0, ticklen;
2035 long n;
2036 const unsigned char *p;
2037 unsigned char *d;
2038
2039 n=s->method->ssl_get_message(s,
2040 SSL3_ST_CR_SESSION_TICKET_A,
2041 SSL3_ST_CR_SESSION_TICKET_B,
2042 -1,
2043 16384,
2044 &ok);
2045
2046 if (!ok)
2047 return((int)n);
2048
2049 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
2050 {
2051 s->s3->tmp.reuse_message=1;
2052 return(1);
2053 }
2054 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
2055 {
2056 al=SSL_AD_UNEXPECTED_MESSAGE;
2057 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2058 goto f_err;
2059 }
2060 if (n < 6)
2061 {
2062 /* need at least ticket_lifetime_hint + ticket length */
2063 al = SSL_AD_DECODE_ERROR;
2064 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2065 goto f_err;
2066 }
2067
2068 p=d=(unsigned char *)s->init_msg;
2069 n2l(p, s->session->tlsext_tick_lifetime_hint);
2070 n2s(p, ticklen);
2071 /* ticket_lifetime_hint + ticket_length + ticket */
2072 if (ticklen + 6 != n)
2073 {
2074 al = SSL_AD_DECODE_ERROR;
2075 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2076 goto f_err;
2077 }
2078 if (s->session->tlsext_tick)
2079 {
2080 OPENSSL_free(s->session->tlsext_tick);
2081 s->session->tlsext_ticklen = 0;
2082 }
2083 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2084 if (!s->session->tlsext_tick)
2085 {
2086 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2087 goto err;
2088 }
2089 memcpy(s->session->tlsext_tick, p, ticklen);
2090 s->session->tlsext_ticklen = ticklen;
2091 /* There are two ways to detect a resumed ticket sesion.
2092 * One is to set an appropriate session ID and then the server
2093 * must return a match in ServerHello. This allows the normal
2094 * client session ID matching to work and we know much
2095 * earlier that the ticket has been accepted.
2096 *
2097 * The other way is to set zero length session ID when the
2098 * ticket is presented and rely on the handshake to determine
2099 * session resumption.
2100 *
2101 * We choose the former approach because this fits in with
2102 * assumptions elsewhere in OpenSSL. The session ID is set
2103 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2104 * ticket.
2105 */
2106 EVP_Digest(p, ticklen,
2107 s->session->session_id, &s->session->session_id_length,
2108 #ifndef OPENSSL_NO_SHA256
2109 EVP_sha256(), NULL);
2110 #else
2111 EVP_sha1(), NULL);
2112 #endif
2113 ret=1;
2114 return(ret);
2115 f_err:
2116 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2117 err:
2118 return(-1);
2119 }
2120
2121 int ssl3_get_cert_status(SSL *s)
2122 {
2123 int ok, al;
2124 unsigned long resplen,n;
2125 const unsigned char *p;
2126
2127 n=s->method->ssl_get_message(s,
2128 SSL3_ST_CR_CERT_STATUS_A,
2129 SSL3_ST_CR_CERT_STATUS_B,
2130 SSL3_MT_CERTIFICATE_STATUS,
2131 16384,
2132 &ok);
2133
2134 if (!ok) return((int)n);
2135 if (n < 4)
2136 {
2137 /* need at least status type + length */
2138 al = SSL_AD_DECODE_ERROR;
2139 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2140 goto f_err;
2141 }
2142 p = (unsigned char *)s->init_msg;
2143 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2144 {
2145 al = SSL_AD_DECODE_ERROR;
2146 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2147 goto f_err;
2148 }
2149 n2l3(p, resplen);
2150 if (resplen + 4 != n)
2151 {
2152 al = SSL_AD_DECODE_ERROR;
2153 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2154 goto f_err;
2155 }
2156 if (s->tlsext_ocsp_resp)
2157 OPENSSL_free(s->tlsext_ocsp_resp);
2158 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2159 if (!s->tlsext_ocsp_resp)
2160 {
2161 al = SSL_AD_INTERNAL_ERROR;
2162 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2163 goto f_err;
2164 }
2165 s->tlsext_ocsp_resplen = resplen;
2166 if (s->ctx->tlsext_status_cb)
2167 {
2168 int ret;
2169 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2170 if (ret == 0)
2171 {
2172 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2173 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2174 goto f_err;
2175 }
2176 if (ret < 0)
2177 {
2178 al = SSL_AD_INTERNAL_ERROR;
2179 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2180 goto f_err;
2181 }
2182 }
2183 return 1;
2184 f_err:
2185 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2186 return(-1);
2187 }
2188 #endif
2189
2190 int ssl3_get_server_done(SSL *s)
2191 {
2192 int ok,ret=0;
2193 long n;
2194
2195 n=s->method->ssl_get_message(s,
2196 SSL3_ST_CR_SRVR_DONE_A,
2197 SSL3_ST_CR_SRVR_DONE_B,
2198 SSL3_MT_SERVER_DONE,
2199 30, /* should be very small, like 0 :-) */
2200 &ok);
2201
2202 if (!ok) return((int)n);
2203 if (n > 0)
2204 {
2205 /* should contain no data */
2206 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2207 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2208 return -1;
2209 }
2210 ret=1;
2211 return(ret);
2212 }
2213
2214
2215 int ssl3_send_client_key_exchange(SSL *s)
2216 {
2217 unsigned char *p,*d;
2218 int n;
2219 unsigned long alg_k;
2220 #ifndef OPENSSL_NO_RSA
2221 unsigned char *q;
2222 EVP_PKEY *pkey=NULL;
2223 #endif
2224 #ifndef OPENSSL_NO_KRB5
2225 KSSL_ERR kssl_err;
2226 #endif /* OPENSSL_NO_KRB5 */
2227 #ifndef OPENSSL_NO_ECDH
2228 EC_KEY *clnt_ecdh = NULL;
2229 const EC_POINT *srvr_ecpoint = NULL;
2230 EVP_PKEY *srvr_pub_pkey = NULL;
2231 unsigned char *encodedPoint = NULL;
2232 int encoded_pt_len = 0;
2233 BN_CTX * bn_ctx = NULL;
2234 #endif
2235
2236 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2237 {
2238 d=(unsigned char *)s->init_buf->data;
2239 p= &(d[4]);
2240
2241 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2242
2243 /* Fool emacs indentation */
2244 if (0) {}
2245 #ifndef OPENSSL_NO_RSA
2246 else if (alg_k & SSL_kRSA)
2247 {
2248 RSA *rsa;
2249 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2250
2251 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2252 rsa=s->session->sess_cert->peer_rsa_tmp;
2253 else
2254 {
2255 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2256 if ((pkey == NULL) ||
2257 (pkey->type != EVP_PKEY_RSA) ||
2258 (pkey->pkey.rsa == NULL))
2259 {
2260 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2261 goto err;
2262 }
2263 rsa=pkey->pkey.rsa;
2264 EVP_PKEY_free(pkey);
2265 }
2266
2267 tmp_buf[0]=s->client_version>>8;
2268 tmp_buf[1]=s->client_version&0xff;
2269 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2270 goto err;
2271
2272 s->session->master_key_length=sizeof tmp_buf;
2273
2274 q=p;
2275 /* Fix buf for TLS and beyond */
2276 if (s->version > SSL3_VERSION)
2277 p+=2;
2278 n=RSA_public_encrypt(sizeof tmp_buf,
2279 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2280 #ifdef PKCS1_CHECK
2281 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2282 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2283 #endif
2284 if (n <= 0)
2285 {
2286 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2287 goto err;
2288 }
2289
2290 /* Fix buf for TLS and beyond */
2291 if (s->version > SSL3_VERSION)
2292 {
2293 s2n(n,q);
2294 n+=2;
2295 }
2296
2297 s->session->master_key_length=
2298 s->method->ssl3_enc->generate_master_secret(s,
2299 s->session->master_key,
2300 tmp_buf,sizeof tmp_buf);
2301 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2302 }
2303 #endif
2304 #ifndef OPENSSL_NO_KRB5
2305 else if (alg_k & SSL_kKRB5)
2306 {
2307 krb5_error_code krb5rc;
2308 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2309 /* krb5_data krb5_ap_req; */
2310 krb5_data *enc_ticket;
2311 krb5_data authenticator, *authp = NULL;
2312 EVP_CIPHER_CTX ciph_ctx;
2313 const EVP_CIPHER *enc = NULL;
2314 unsigned char iv[EVP_MAX_IV_LENGTH];
2315 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2316 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2317 + EVP_MAX_IV_LENGTH];
2318 int padl, outl = sizeof(epms);
2319
2320 EVP_CIPHER_CTX_init(&ciph_ctx);
2321
2322 #ifdef KSSL_DEBUG
2323 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2324 alg_k, SSL_kKRB5);
2325 #endif /* KSSL_DEBUG */
2326
2327 authp = NULL;
2328 #ifdef KRB5SENDAUTH
2329 if (KRB5SENDAUTH) authp = &authenticator;
2330 #endif /* KRB5SENDAUTH */
2331
2332 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2333 &kssl_err);
2334 enc = kssl_map_enc(kssl_ctx->enctype);
2335 if (enc == NULL)
2336 goto err;
2337 #ifdef KSSL_DEBUG
2338 {
2339 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2340 if (krb5rc && kssl_err.text)
2341 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2342 }
2343 #endif /* KSSL_DEBUG */
2344
2345 if (krb5rc)
2346 {
2347 ssl3_send_alert(s,SSL3_AL_FATAL,
2348 SSL_AD_HANDSHAKE_FAILURE);
2349 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2350 kssl_err.reason);
2351 goto err;
2352 }
2353
2354 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2355 ** in place of RFC 2712 KerberosWrapper, as in:
2356 **
2357 ** Send ticket (copy to *p, set n = length)
2358 ** n = krb5_ap_req.length;
2359 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2360 ** if (krb5_ap_req.data)
2361 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2362 **
2363 ** Now using real RFC 2712 KerberosWrapper
2364 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2365 ** Note: 2712 "opaque" types are here replaced
2366 ** with a 2-byte length followed by the value.
2367 ** Example:
2368 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2369 ** Where "xx xx" = length bytes. Shown here with
2370 ** optional authenticator omitted.
2371 */
2372
2373 /* KerberosWrapper.Ticket */
2374 s2n(enc_ticket->length,p);
2375 memcpy(p, enc_ticket->data, enc_ticket->length);
2376 p+= enc_ticket->length;
2377 n = enc_ticket->length + 2;
2378
2379 /* KerberosWrapper.Authenticator */
2380 if (authp && authp->length)
2381 {
2382 s2n(authp->length,p);
2383 memcpy(p, authp->data, authp->length);
2384 p+= authp->length;
2385 n+= authp->length + 2;
2386
2387 free(authp->data);
2388 authp->data = NULL;
2389 authp->length = 0;
2390 }
2391 else
2392 {
2393 s2n(0,p);/* null authenticator length */
2394 n+=2;
2395 }
2396
2397 tmp_buf[0]=s->client_version>>8;
2398 tmp_buf[1]=s->client_version&0xff;
2399 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2400 goto err;
2401
2402 /* 20010420 VRS. Tried it this way; failed.
2403 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2404 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2405 ** kssl_ctx->length);
2406 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2407 */
2408
2409 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2410 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2411 kssl_ctx->key,iv);
2412 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2413 sizeof tmp_buf);
2414 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2415 outl += padl;
2416 if (outl > (int)sizeof epms)
2417 {
2418 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2419 goto err;
2420 }
2421 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2422
2423 /* KerberosWrapper.EncryptedPreMasterSecret */
2424 s2n(outl,p);
2425 memcpy(p, epms, outl);
2426 p+=outl;
2427 n+=outl + 2;
2428
2429 s->session->master_key_length=
2430 s->method->ssl3_enc->generate_master_secret(s,
2431 s->session->master_key,
2432 tmp_buf, sizeof tmp_buf);
2433
2434 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2435 OPENSSL_cleanse(epms, outl);
2436 }
2437 #endif
2438 #ifndef OPENSSL_NO_DH
2439 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2440 {
2441 DH *dh_srvr,*dh_clnt;
2442 SESS_CERT *scert = s->session->sess_cert;
2443
2444 if (scert == NULL)
2445 {
2446 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2447 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2448 goto err;
2449 }
2450
2451 if (scert->peer_dh_tmp != NULL)
2452 dh_srvr=scert->peer_dh_tmp;
2453 else
2454 {
2455 /* we get them from the cert */
2456 int idx = scert->peer_cert_type;
2457 EVP_PKEY *spkey = NULL;
2458 dh_srvr = NULL;
2459 if (idx >= 0)
2460 spkey = X509_get_pubkey(
2461 scert->peer_pkeys[idx].x509);
2462 if (spkey)
2463 {
2464 dh_srvr = EVP_PKEY_get1_DH(spkey);
2465 EVP_PKEY_free(spkey);
2466 }
2467 if (dh_srvr == NULL)
2468 {
2469 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2470 ERR_R_INTERNAL_ERROR);
2471 goto err;
2472 }
2473 }
2474 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2475 {
2476 /* Use client certificate key */
2477 EVP_PKEY *clkey = s->cert->key->privatekey;
2478 dh_clnt = NULL;
2479 if (clkey)
2480 dh_clnt = EVP_PKEY_get1_DH(clkey);
2481 if (dh_clnt == NULL)
2482 {
2483 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2484 ERR_R_INTERNAL_ERROR);
2485 goto err;
2486 }
2487 }
2488 else
2489 {
2490 /* generate a new random key */
2491 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2492 {
2493 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2494 goto err;
2495 }
2496 if (!DH_generate_key(dh_clnt))
2497 {
2498 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2499 DH_free(dh_clnt);
2500 goto err;
2501 }
2502 }
2503
2504 /* use the 'p' output buffer for the DH key, but
2505 * make sure to clear it out afterwards */
2506
2507 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2508 if (scert->peer_dh_tmp == NULL)
2509 DH_free(dh_srvr);
2510
2511 if (n <= 0)
2512 {
2513 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2514 DH_free(dh_clnt);
2515 goto err;
2516 }
2517
2518 /* generate master key from the result */
2519 s->session->master_key_length=
2520 s->method->ssl3_enc->generate_master_secret(s,
2521 s->session->master_key,p,n);
2522 /* clean up */
2523 memset(p,0,n);
2524
2525 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2526 n = 0;
2527 else
2528 {
2529 /* send off the data */
2530 n=BN_num_bytes(dh_clnt->pub_key);
2531 s2n(n,p);
2532 BN_bn2bin(dh_clnt->pub_key,p);
2533 n+=2;
2534 }
2535
2536 DH_free(dh_clnt);
2537
2538 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2539 }
2540 #endif
2541
2542 #ifndef OPENSSL_NO_ECDH
2543 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
2544 {
2545 const EC_GROUP *srvr_group = NULL;
2546 EC_KEY *tkey;
2547 int ecdh_clnt_cert = 0;
2548 int field_size = 0;
2549
2550 /* Did we send out the client's
2551 * ECDH share for use in premaster
2552 * computation as part of client certificate?
2553 * If so, set ecdh_clnt_cert to 1.
2554 */
2555 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2556 {
2557 /* XXX: For now, we do not support client
2558 * authentication using ECDH certificates.
2559 * To add such support, one needs to add
2560 * code that checks for appropriate
2561 * conditions and sets ecdh_clnt_cert to 1.
2562 * For example, the cert have an ECC
2563 * key on the same curve as the server's
2564 * and the key should be authorized for
2565 * key agreement.
2566 *
2567 * One also needs to add code in ssl3_connect
2568 * to skip sending the certificate verify
2569 * message.
2570 *
2571 * if ((s->cert->key->privatekey != NULL) &&
2572 * (s->cert->key->privatekey->type ==
2573 * EVP_PKEY_EC) && ...)
2574 * ecdh_clnt_cert = 1;
2575 */
2576 }
2577
2578 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2579 {
2580 tkey = s->session->sess_cert->peer_ecdh_tmp;
2581 }
2582 else
2583 {
2584 /* Get the Server Public Key from Cert */
2585 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2586 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2587 if ((srvr_pub_pkey == NULL) ||
2588 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2589 (srvr_pub_pkey->pkey.ec == NULL))
2590 {
2591 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2592 ERR_R_INTERNAL_ERROR);
2593 goto err;
2594 }
2595
2596 tkey = srvr_pub_pkey->pkey.ec;
2597 }
2598
2599 srvr_group = EC_KEY_get0_group(tkey);
2600 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2601
2602 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2603 {
2604 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2605 ERR_R_INTERNAL_ERROR);
2606 goto err;
2607 }
2608
2609 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2610 {
2611 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2612 goto err;
2613 }
2614
2615 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2616 {
2617 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2618 goto err;
2619 }
2620 if (ecdh_clnt_cert)
2621 {
2622 /* Reuse key info from our certificate
2623 * We only need our private key to perform
2624 * the ECDH computation.
2625 */
2626 const BIGNUM *priv_key;
2627 tkey = s->cert->key->privatekey->pkey.ec;
2628 priv_key = EC_KEY_get0_private_key(tkey);
2629 if (priv_key == NULL)
2630 {
2631 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2632 goto err;
2633 }
2634 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2635 {
2636 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2637 goto err;
2638 }
2639 }
2640 else
2641 {
2642 /* Generate a new ECDH key pair */
2643 if (!(EC_KEY_generate_key(clnt_ecdh)))
2644 {
2645 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2646 goto err;
2647 }
2648 }
2649
2650 /* use the 'p' output buffer for the ECDH key, but
2651 * make sure to clear it out afterwards
2652 */
2653
2654 field_size = EC_GROUP_get_degree(srvr_group);
2655 if (field_size <= 0)
2656 {
2657 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2658 ERR_R_ECDH_LIB);
2659 goto err;
2660 }
2661 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2662 if (n <= 0)
2663 {
2664 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2665 ERR_R_ECDH_LIB);
2666 goto err;
2667 }
2668
2669 /* generate master key from the result */
2670 s->session->master_key_length = s->method->ssl3_enc \
2671 -> generate_master_secret(s,
2672 s->session->master_key,
2673 p, n);
2674
2675 memset(p, 0, n); /* clean up */
2676
2677 if (ecdh_clnt_cert)
2678 {
2679 /* Send empty client key exch message */
2680 n = 0;
2681 }
2682 else
2683 {
2684 /* First check the size of encoding and
2685 * allocate memory accordingly.
2686 */
2687 encoded_pt_len =
2688 EC_POINT_point2oct(srvr_group,
2689 EC_KEY_get0_public_key(clnt_ecdh),
2690 POINT_CONVERSION_UNCOMPRESSED,
2691 NULL, 0, NULL);
2692
2693 encodedPoint = (unsigned char *)
2694 OPENSSL_malloc(encoded_pt_len *
2695 sizeof(unsigned char));
2696 bn_ctx = BN_CTX_new();
2697 if ((encodedPoint == NULL) ||
2698 (bn_ctx == NULL))
2699 {
2700 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2701 goto err;
2702 }
2703
2704 /* Encode the public key */
2705 n = EC_POINT_point2oct(srvr_group,
2706 EC_KEY_get0_public_key(clnt_ecdh),
2707 POINT_CONVERSION_UNCOMPRESSED,
2708 encodedPoint, encoded_pt_len, bn_ctx);
2709
2710 *p = n; /* length of encoded point */
2711 /* Encoded point will be copied here */
2712 p += 1;
2713 /* copy the point */
2714 memcpy((unsigned char *)p, encodedPoint, n);
2715 /* increment n to account for length field */
2716 n += 1;
2717 }
2718
2719 /* Free allocated memory */
2720 BN_CTX_free(bn_ctx);
2721 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2722 if (clnt_ecdh != NULL)
2723 EC_KEY_free(clnt_ecdh);
2724 EVP_PKEY_free(srvr_pub_pkey);
2725 }
2726 #endif /* !OPENSSL_NO_ECDH */
2727 else if (alg_k & SSL_kGOST)
2728 {
2729 /* GOST key exchange message creation */
2730 EVP_PKEY_CTX *pkey_ctx;
2731 X509 *peer_cert;
2732 size_t msglen;
2733 unsigned int md_len;
2734 int keytype;
2735 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2736 EVP_MD_CTX *ukm_hash;
2737 EVP_PKEY *pub_key;
2738
2739 /* Get server sertificate PKEY and create ctx from it */
2740 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2741 if (!peer_cert)
2742 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2743 if (!peer_cert) {
2744 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2745 goto err;
2746 }
2747
2748 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2749 /* If we have send a certificate, and certificate key
2750
2751 * parameters match those of server certificate, use
2752 * certificate key for key exchange
2753 */
2754
2755 /* Otherwise, generate ephemeral key pair */
2756
2757 EVP_PKEY_encrypt_init(pkey_ctx);
2758 /* Generate session key */
2759 RAND_bytes(premaster_secret,32);
2760 /* If we have client certificate, use its secret as peer key */
2761 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2762 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
2763 /* If there was an error - just ignore it. Ephemeral key
2764 * would be used
2765 */
2766 ERR_clear_error();
2767 }
2768 }
2769 /* Compute shared IV and store it in algorithm-specific
2770 * context data */
2771 ukm_hash = EVP_MD_CTX_create();
2772 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
2773 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
2774 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
2775 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2776 EVP_MD_CTX_destroy(ukm_hash);
2777 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
2778 8,shared_ukm)<0) {
2779 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2780 SSL_R_LIBRARY_BUG);
2781 goto err;
2782 }
2783 /* Make GOST keytransport blob message */
2784 /*Encapsulate it into sequence */
2785 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2786 msglen=255;
2787 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
2788 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2789 SSL_R_LIBRARY_BUG);
2790 goto err;
2791 }
2792 if (msglen >= 0x80)
2793 {
2794 *(p++)=0x81;
2795 *(p++)= msglen & 0xff;
2796 n=msglen+3;
2797 }
2798 else
2799 {
2800 *(p++)= msglen & 0xff;
2801 n=msglen+2;
2802 }
2803 memcpy(p, tmp, msglen);
2804 /* Check if pubkey from client certificate was used */
2805 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2806 {
2807 /* Set flag "skip certificate verify" */
2808 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2809 }
2810 EVP_PKEY_CTX_free(pkey_ctx);
2811 s->session->master_key_length=
2812 s->method->ssl3_enc->generate_master_secret(s,
2813 s->session->master_key,premaster_secret,32);
2814 EVP_PKEY_free(pub_key);
2815
2816 }
2817 #ifndef OPENSSL_NO_SRP
2818 else if (alg_k & SSL_kSRP)
2819 {
2820 if (s->srp_ctx.A != NULL)
2821 {
2822 /* send off the data */
2823 n=BN_num_bytes(s->srp_ctx.A);
2824 s2n(n,p);
2825 BN_bn2bin(s->srp_ctx.A,p);
2826 n+=2;
2827 }
2828 else
2829 {
2830 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2831 goto err;
2832 }
2833 if (s->session->srp_username != NULL)
2834 OPENSSL_free(s->session->srp_username);
2835 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2836 if (s->session->srp_username == NULL)
2837 {
2838 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2839 ERR_R_MALLOC_FAILURE);
2840 goto err;
2841 }
2842
2843 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
2844 {
2845 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2846 goto err;
2847 }
2848 }
2849 #endif
2850 #ifndef OPENSSL_NO_PSK
2851 else if (alg_k & SSL_kPSK)
2852 {
2853 char identity[PSK_MAX_IDENTITY_LEN];
2854 unsigned char *t = NULL;
2855 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
2856 unsigned int pre_ms_len = 0, psk_len = 0;
2857 int psk_err = 1;
2858
2859 n = 0;
2860 if (s->psk_client_callback == NULL)
2861 {
2862 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2863 SSL_R_PSK_NO_CLIENT_CB);
2864 goto err;
2865 }
2866
2867 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
2868 identity, PSK_MAX_IDENTITY_LEN,
2869 psk_or_pre_ms, sizeof(psk_or_pre_ms));
2870 if (psk_len > PSK_MAX_PSK_LEN)
2871 {
2872 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2873 ERR_R_INTERNAL_ERROR);
2874 goto psk_err;
2875 }
2876 else if (psk_len == 0)
2877 {
2878 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2879 SSL_R_PSK_IDENTITY_NOT_FOUND);
2880 goto psk_err;
2881 }
2882
2883 /* create PSK pre_master_secret */
2884 pre_ms_len = 2+psk_len+2+psk_len;
2885 t = psk_or_pre_ms;
2886 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
2887 s2n(psk_len, t);
2888 memset(t, 0, psk_len);
2889 t+=psk_len;
2890 s2n(psk_len, t);
2891
2892 if (s->session->psk_identity_hint != NULL)
2893 OPENSSL_free(s->session->psk_identity_hint);
2894 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
2895 if (s->ctx->psk_identity_hint != NULL &&
2896 s->session->psk_identity_hint == NULL)
2897 {
2898 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2899 ERR_R_MALLOC_FAILURE);
2900 goto psk_err;
2901 }
2902
2903 if (s->session->psk_identity != NULL)
2904 OPENSSL_free(s->session->psk_identity);
2905 s->session->psk_identity = BUF_strdup(identity);
2906 if (s->session->psk_identity == NULL)
2907 {
2908 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2909 ERR_R_MALLOC_FAILURE);
2910 goto psk_err;
2911 }
2912
2913 s->session->master_key_length =
2914 s->method->ssl3_enc->generate_master_secret(s,
2915 s->session->master_key,
2916 psk_or_pre_ms, pre_ms_len);
2917 n = strlen(identity);
2918 s2n(n, p);
2919 memcpy(p, identity, n);
2920 n+=2;
2921 psk_err = 0;
2922 psk_err:
2923 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
2924 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
2925 if (psk_err != 0)
2926 {
2927 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2928 goto err;
2929 }
2930 }
2931 #endif
2932 else
2933 {
2934 ssl3_send_alert(s, SSL3_AL_FATAL,
2935 SSL_AD_HANDSHAKE_FAILURE);
2936 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2937 ERR_R_INTERNAL_ERROR);
2938 goto err;
2939 }
2940
2941 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
2942 l2n3(n,d);
2943
2944 s->state=SSL3_ST_CW_KEY_EXCH_B;
2945 /* number of bytes to write */
2946 s->init_num=n+4;
2947 s->init_off=0;
2948 }
2949
2950 /* SSL3_ST_CW_KEY_EXCH_B */
2951 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2952 err:
2953 #ifndef OPENSSL_NO_ECDH
2954 BN_CTX_free(bn_ctx);
2955 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2956 if (clnt_ecdh != NULL)
2957 EC_KEY_free(clnt_ecdh);
2958 EVP_PKEY_free(srvr_pub_pkey);
2959 #endif
2960 return(-1);
2961 }
2962
2963 int ssl3_send_client_verify(SSL *s)
2964 {
2965 unsigned char *p,*d;
2966 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
2967 EVP_PKEY *pkey;
2968 EVP_PKEY_CTX *pctx=NULL;
2969 EVP_MD_CTX mctx;
2970 unsigned u=0;
2971 unsigned long n;
2972 int j;
2973
2974 EVP_MD_CTX_init(&mctx);
2975
2976 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
2977 {
2978 d=(unsigned char *)s->init_buf->data;
2979 p= &(d[4]);
2980 pkey=s->cert->key->privatekey;
2981 /* Create context from key and test if sha1 is allowed as digest */
2982 pctx = EVP_PKEY_CTX_new(pkey,NULL);
2983 EVP_PKEY_sign_init(pctx);
2984 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
2985 {
2986 if (TLS1_get_version(s) < TLS1_2_VERSION)
2987 s->method->ssl3_enc->cert_verify_mac(s,
2988 NID_sha1,
2989 &(data[MD5_DIGEST_LENGTH]));
2990 }
2991 else
2992 {
2993 ERR_clear_error();
2994 }
2995 /* For TLS v1.2 send signature algorithm and signature
2996 * using agreed digest and cached handshake records.
2997 */
2998 if (TLS1_get_version(s) >= TLS1_2_VERSION)
2999 {
3000 long hdatalen = 0;
3001 void *hdata;
3002 const EVP_MD *md = s->cert->key->digest;
3003 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
3004 &hdata);
3005 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
3006 {
3007 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3008 ERR_R_INTERNAL_ERROR);
3009 goto err;
3010 }
3011 p += 2;
3012 #ifdef SSL_DEBUG
3013 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
3014 EVP_MD_name(md));
3015 #endif
3016 if (!EVP_SignInit_ex(&mctx, md, NULL)
3017 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3018 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
3019 {
3020 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3021 ERR_R_EVP_LIB);
3022 goto err;
3023 }
3024 s2n(u,p);
3025 n = u + 4;
3026 if (!ssl3_digest_cached_records(s))
3027 goto err;
3028 }
3029 else
3030 #ifndef OPENSSL_NO_RSA
3031 if (pkey->type == EVP_PKEY_RSA)
3032 {
3033 s->method->ssl3_enc->cert_verify_mac(s,
3034 NID_md5,
3035 &(data[0]));
3036 if (RSA_sign(NID_md5_sha1, data,
3037 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3038 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3039 {
3040 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3041 goto err;
3042 }
3043 s2n(u,p);
3044 n=u+2;
3045 }
3046 else
3047 #endif
3048 #ifndef OPENSSL_NO_DSA
3049 if (pkey->type == EVP_PKEY_DSA)
3050 {
3051 if (!DSA_sign(pkey->save_type,
3052 &(data[MD5_DIGEST_LENGTH]),
3053 SHA_DIGEST_LENGTH,&(p[2]),
3054 (unsigned int *)&j,pkey->pkey.dsa))
3055 {
3056 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3057 goto err;
3058 }
3059 s2n(j,p);
3060 n=j+2;
3061 }
3062 else
3063 #endif
3064 #ifndef OPENSSL_NO_ECDSA
3065 if (pkey->type == EVP_PKEY_EC)
3066 {
3067 if (!ECDSA_sign(pkey->save_type,
3068 &(data[MD5_DIGEST_LENGTH]),
3069 SHA_DIGEST_LENGTH,&(p[2]),
3070 (unsigned int *)&j,pkey->pkey.ec))
3071 {
3072 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3073 ERR_R_ECDSA_LIB);
3074 goto err;
3075 }
3076 s2n(j,p);
3077 n=j+2;
3078 }
3079 else
3080 #endif
3081 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3082 {
3083 unsigned char signbuf[64];
3084 int i;
3085 size_t sigsize=64;
3086 s->method->ssl3_enc->cert_verify_mac(s,
3087 NID_id_GostR3411_94,
3088 data);
3089 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3090 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3091 ERR_R_INTERNAL_ERROR);
3092 goto err;
3093 }
3094 for (i=63,j=0; i>=0; j++, i--) {
3095 p[2+j]=signbuf[i];
3096 }
3097 s2n(j,p);
3098 n=j+2;
3099 }
3100 else
3101 {
3102 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3103 goto err;
3104 }
3105 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
3106 l2n3(n,d);
3107
3108 s->state=SSL3_ST_CW_CERT_VRFY_B;
3109 s->init_num=(int)n+4;
3110 s->init_off=0;
3111 }
3112 EVP_MD_CTX_cleanup(&mctx);
3113 EVP_PKEY_CTX_free(pctx);
3114 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3115 err:
3116 EVP_MD_CTX_cleanup(&mctx);
3117 EVP_PKEY_CTX_free(pctx);
3118 return(-1);
3119 }
3120
3121 /* Check a certificate can be used for client authentication. Currently
3122 * just check cert exists and if static DH client certificates can be used.
3123 */
3124 static int ssl3_check_client_certificate(SSL *s)
3125 {
3126 unsigned long alg_k;
3127 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
3128 return 0;
3129 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3130 /* See if we can use client certificate for fixed DH */
3131 if (alg_k & (SSL_kDHr|SSL_kDHd))
3132 {
3133 SESS_CERT *scert = s->session->sess_cert;
3134 int i = scert->peer_cert_type;
3135 EVP_PKEY *clkey = NULL, *spkey = NULL;
3136 clkey = s->cert->key->privatekey;
3137 /* If client key not DH assume it can be used */
3138 if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
3139 return 1;
3140 if (i >= 0)
3141 spkey = X509_get_pubkey(scert->peer_pkeys[i].x509);
3142 if (spkey)
3143 {
3144 /* Compare server and client parameters */
3145 i = EVP_PKEY_cmp_parameters(clkey, spkey);
3146 EVP_PKEY_free(spkey);
3147 if (i != 1)
3148 return 0;
3149 }
3150 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3151 }
3152 return 1;
3153 }
3154
3155 int ssl3_send_client_certificate(SSL *s)
3156 {
3157 X509 *x509=NULL;
3158 EVP_PKEY *pkey=NULL;
3159 int i;
3160 unsigned long l;
3161
3162 if (s->state == SSL3_ST_CW_CERT_A)
3163 {
3164 /* Let cert callback update client certificates if required */
3165 if (s->cert->cert_cb
3166 && s->cert->cert_cb(s, s->cert->cert_cb_arg) <= 0)
3167 {
3168 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3169 return 0;
3170 }
3171 if (ssl3_check_client_certificate(s))
3172 s->state=SSL3_ST_CW_CERT_C;
3173 else
3174 s->state=SSL3_ST_CW_CERT_B;
3175 }
3176
3177 /* We need to get a client cert */
3178 if (s->state == SSL3_ST_CW_CERT_B)
3179 {
3180 /* If we get an error, we need to
3181 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3182 * We then get retied later */
3183 i=0;
3184 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3185 if (i < 0)
3186 {
3187 s->rwstate=SSL_X509_LOOKUP;
3188 return(-1);
3189 }
3190 s->rwstate=SSL_NOTHING;
3191 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3192 {
3193 s->state=SSL3_ST_CW_CERT_B;
3194 if ( !SSL_use_certificate(s,x509) ||
3195 !SSL_use_PrivateKey(s,pkey))
3196 i=0;
3197 }
3198 else if (i == 1)
3199 {
3200 i=0;
3201 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3202 }
3203
3204 if (x509 != NULL) X509_free(x509);
3205 if (pkey != NULL) EVP_PKEY_free(pkey);
3206 if (i && !ssl3_check_client_certificate(s))
3207 i = 0;
3208 if (i == 0)
3209 {
3210 if (s->version == SSL3_VERSION)
3211 {
3212 s->s3->tmp.cert_req=0;
3213 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3214 return(1);
3215 }
3216 else
3217 {
3218 s->s3->tmp.cert_req=2;
3219 }
3220 }
3221
3222 /* Ok, we have a cert */
3223 s->state=SSL3_ST_CW_CERT_C;
3224 }
3225
3226 if (s->state == SSL3_ST_CW_CERT_C)
3227 {
3228 s->state=SSL3_ST_CW_CERT_D;
3229 l=ssl3_output_cert_chain(s,
3230 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key);
3231 s->init_num=(int)l;
3232 s->init_off=0;
3233 }
3234 /* SSL3_ST_CW_CERT_D */
3235 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3236 }
3237
3238 #define has_bits(i,m) (((i)&(m)) == (m))
3239
3240 int ssl3_check_cert_and_algorithm(SSL *s)
3241 {
3242 int i,idx;
3243 long alg_k,alg_a;
3244 EVP_PKEY *pkey=NULL;
3245 SESS_CERT *sc;
3246 #ifndef OPENSSL_NO_RSA
3247 RSA *rsa;
3248 #endif
3249 #ifndef OPENSSL_NO_DH
3250 DH *dh;
3251 #endif
3252
3253 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3254 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3255
3256 /* we don't have a certificate */
3257 if ((alg_a & (SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3258 return(1);
3259
3260 sc=s->session->sess_cert;
3261 if (sc == NULL)
3262 {
3263 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3264 goto err;
3265 }
3266
3267 #ifndef OPENSSL_NO_RSA
3268 rsa=s->session->sess_cert->peer_rsa_tmp;
3269 #endif
3270 #ifndef OPENSSL_NO_DH
3271 dh=s->session->sess_cert->peer_dh_tmp;
3272 #endif
3273
3274 /* This is the passed certificate */
3275
3276 idx=sc->peer_cert_type;
3277 #ifndef OPENSSL_NO_ECDH
3278 if (idx == SSL_PKEY_ECC)
3279 {
3280 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3281 s) == 0)
3282 { /* check failed */
3283 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3284 goto f_err;
3285 }
3286 else
3287 {
3288 return 1;
3289 }
3290 }
3291 #endif
3292 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3293 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3294 EVP_PKEY_free(pkey);
3295
3296
3297 /* Check that we have a certificate if we require one */
3298 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3299 {
3300 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3301 goto f_err;
3302 }
3303 #ifndef OPENSSL_NO_DSA
3304 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3305 {
3306 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3307 goto f_err;
3308 }
3309 #endif
3310 #ifndef OPENSSL_NO_RSA
3311 if ((alg_k & SSL_kRSA) &&
3312 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3313 {
3314 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3315 goto f_err;
3316 }
3317 #endif
3318 #ifndef OPENSSL_NO_DH
3319 if ((alg_k & SSL_kEDH) &&
3320 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3321 {
3322 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3323 goto f_err;
3324 }
3325 else if ((alg_k & SSL_kDHr) && (TLS1_get_version(s) < TLS1_2_VERSION) &&
3326 !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3327 {
3328 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3329 goto f_err;
3330 }
3331 #ifndef OPENSSL_NO_DSA
3332 else if ((alg_k & SSL_kDHd) && (TLS1_get_version(s) < TLS1_2_VERSION) &&
3333 !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3334 {
3335 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3336 goto f_err;
3337 }
3338 #endif
3339 #endif
3340
3341 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3342 {
3343 #ifndef OPENSSL_NO_RSA
3344 if (alg_k & SSL_kRSA)
3345 {
3346 if (rsa == NULL
3347 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3348 {
3349 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3350 goto f_err;
3351 }
3352 }
3353 else
3354 #endif
3355 #ifndef OPENSSL_NO_DH
3356 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
3357 {
3358 if (dh == NULL
3359 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3360 {
3361 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3362 goto f_err;
3363 }
3364 }
3365 else
3366 #endif
3367 {
3368 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3369 goto f_err;
3370 }
3371 }
3372 return(1);
3373 f_err:
3374 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3375 err:
3376 return(0);
3377 }
3378
3379 /* Check to see if handshake is full or resumed. Usually this is just a
3380 * case of checking to see if a cache hit has occurred. In the case of
3381 * session tickets we have to check the next message to be sure.
3382 */
3383
3384 #ifndef OPENSSL_NO_TLSEXT
3385 # ifndef OPENSSL_NO_NEXTPROTONEG
3386 int ssl3_send_next_proto(SSL *s)
3387 {
3388 unsigned int len, padding_len;
3389 unsigned char *d;
3390
3391 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3392 {
3393 len = s->next_proto_negotiated_len;
3394 padding_len = 32 - ((len + 2) % 32);
3395 d = (unsigned char *)s->init_buf->data;
3396 d[4] = len;
3397 memcpy(d + 5, s->next_proto_negotiated, len);
3398 d[5 + len] = padding_len;
3399 memset(d + 6 + len, 0, padding_len);
3400 *(d++)=SSL3_MT_NEXT_PROTO;
3401 l2n3(2 + len + padding_len, d);
3402 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3403 s->init_num = 4 + 2 + len + padding_len;
3404 s->init_off = 0;
3405 }
3406
3407 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3408 }
3409 # endif
3410
3411 int ssl3_check_finished(SSL *s)
3412 {
3413 int ok;
3414 long n;
3415 /* If we have no ticket it cannot be a resumed session. */
3416 if (!s->session->tlsext_tick)
3417 return 1;
3418 /* this function is called when we really expect a Certificate
3419 * message, so permit appropriate message length */
3420 n=s->method->ssl_get_message(s,
3421 SSL3_ST_CR_CERT_A,
3422 SSL3_ST_CR_CERT_B,
3423 -1,
3424 s->max_cert_list,
3425 &ok);
3426 if (!ok) return((int)n);
3427 s->s3->tmp.reuse_message = 1;
3428 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3429 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3430 return 2;
3431
3432 return 1;
3433 }
3434 #endif
3435
3436 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3437 {
3438 int i = 0;
3439 #ifndef OPENSSL_NO_ENGINE
3440 if (s->ctx->client_cert_engine)
3441 {
3442 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3443 SSL_get_client_CA_list(s),
3444 px509, ppkey, NULL, NULL, NULL);
3445 if (i != 0)
3446 return i;
3447 }
3448 #endif
3449 if (s->ctx->client_cert_cb)
3450 i = s->ctx->client_cert_cb(s,px509,ppkey);
3451 return i;
3452 }
A mirror of the official openssl repository