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Set s->hit when resuming from external pre-shared secret.
[thirdparty/openssl.git] / ssl / s3_clnt.c
1 /* ssl/s3_clnt.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58 /* ====================================================================
59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 *
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
71 * distribution.
72 *
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 *
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
82 *
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 * acknowledgment:
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
105 *
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
109 *
110 */
111 /* ====================================================================
112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113 *
114 * Portions of the attached software ("Contribution") are developed by
115 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
116 *
117 * The Contribution is licensed pursuant to the OpenSSL open source
118 * license provided above.
119 *
120 * ECC cipher suite support in OpenSSL originally written by
121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
122 *
123 */
124 /* ====================================================================
125 * Copyright 2005 Nokia. All rights reserved.
126 *
127 * The portions of the attached software ("Contribution") is developed by
128 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
129 * license.
130 *
131 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
132 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
133 * support (see RFC 4279) to OpenSSL.
134 *
135 * No patent licenses or other rights except those expressly stated in
136 * the OpenSSL open source license shall be deemed granted or received
137 * expressly, by implication, estoppel, or otherwise.
138 *
139 * No assurances are provided by Nokia that the Contribution does not
140 * infringe the patent or other intellectual property rights of any third
141 * party or that the license provides you with all the necessary rights
142 * to make use of the Contribution.
143 *
144 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
145 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
146 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
147 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
148 * OTHERWISE.
149 */
150
151 #include <stdio.h>
152 #include "ssl_locl.h"
153 #include "kssl_lcl.h"
154 #include <openssl/buffer.h>
155 #include <openssl/rand.h>
156 #include <openssl/objects.h>
157 #include <openssl/evp.h>
158 #include <openssl/md5.h>
159 #ifdef OPENSSL_FIPS
160 #include <openssl/fips.h>
161 #endif
162 #ifndef OPENSSL_NO_DH
163 #include <openssl/dh.h>
164 #endif
165 #include <openssl/bn.h>
166 #ifndef OPENSSL_NO_ENGINE
167 #include <openssl/engine.h>
168 #endif
169
170 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
171
172 #ifndef OPENSSL_NO_SSL3_METHOD
173 static const SSL_METHOD *ssl3_get_client_method(int ver)
174 {
175 if (ver == SSL3_VERSION)
176 return(SSLv3_client_method());
177 else
178 return(NULL);
179 }
180
181 IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
182 ssl_undefined_function,
183 ssl3_connect,
184 ssl3_get_client_method)
185 #endif
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 if (!ssl_security(s, SSL_SECOP_VERSION, 0,
246 s->version, NULL))
247 {
248 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_VERSION_TOO_LOW);
249 return -1;
250 }
251
252 /* s->version=SSL3_VERSION; */
253 s->type=SSL_ST_CONNECT;
254
255 if (s->init_buf == NULL)
256 {
257 if ((buf=BUF_MEM_new()) == NULL)
258 {
259 ret= -1;
260 goto end;
261 }
262 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
263 {
264 ret= -1;
265 goto end;
266 }
267 s->init_buf=buf;
268 buf=NULL;
269 }
270
271 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
272
273 /* setup buffing BIO */
274 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
275
276 /* don't push the buffering BIO quite yet */
277
278 ssl3_init_finished_mac(s);
279
280 s->state=SSL3_ST_CW_CLNT_HELLO_A;
281 s->ctx->stats.sess_connect++;
282 s->init_num=0;
283 break;
284
285 case SSL3_ST_CW_CLNT_HELLO_A:
286 case SSL3_ST_CW_CLNT_HELLO_B:
287
288 s->shutdown=0;
289 ret=ssl3_client_hello(s);
290 if (ret <= 0) goto end;
291 s->state=SSL3_ST_CR_SRVR_HELLO_A;
292 s->init_num=0;
293
294 /* turn on buffering for the next lot of output */
295 if (s->bbio != s->wbio)
296 s->wbio=BIO_push(s->bbio,s->wbio);
297
298 break;
299
300 case SSL3_ST_CR_SRVR_HELLO_A:
301 case SSL3_ST_CR_SRVR_HELLO_B:
302 ret=ssl3_get_server_hello(s);
303 if (ret <= 0) goto end;
304
305 if (s->hit)
306 {
307 s->state=SSL3_ST_CR_FINISHED_A;
308 #ifndef OPENSSL_NO_TLSEXT
309 if (s->tlsext_ticket_expected)
310 {
311 /* receive renewed session ticket */
312 s->state=SSL3_ST_CR_SESSION_TICKET_A;
313 }
314 #endif
315 }
316 else
317 {
318 s->state=SSL3_ST_CR_CERT_A;
319 }
320 s->init_num=0;
321 break;
322 case SSL3_ST_CR_CERT_A:
323 case SSL3_ST_CR_CERT_B:
324 #ifndef OPENSSL_NO_TLSEXT
325 ret=ssl3_check_finished(s);
326 if (ret <= 0) goto end;
327 if (ret == 2)
328 {
329 s->hit = 1;
330 if (s->tlsext_ticket_expected)
331 s->state=SSL3_ST_CR_SESSION_TICKET_A;
332 else
333 s->state=SSL3_ST_CR_FINISHED_A;
334 s->init_num=0;
335 break;
336 }
337 #endif
338 /* Check if it is anon DH/ECDH, SRP auth */
339 /* or PSK */
340 if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL|SSL_aSRP)) &&
341 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
342 {
343 ret=ssl3_get_server_certificate(s);
344 if (ret <= 0) goto end;
345 #ifndef OPENSSL_NO_TLSEXT
346 if (s->tlsext_status_expected)
347 s->state=SSL3_ST_CR_CERT_STATUS_A;
348 else
349 s->state=SSL3_ST_CR_KEY_EXCH_A;
350 }
351 else
352 {
353 skip = 1;
354 s->state=SSL3_ST_CR_KEY_EXCH_A;
355 }
356 #else
357 }
358 else
359 skip=1;
360
361 s->state=SSL3_ST_CR_KEY_EXCH_A;
362 #endif
363 s->init_num=0;
364 break;
365
366 case SSL3_ST_CR_KEY_EXCH_A:
367 case SSL3_ST_CR_KEY_EXCH_B:
368 ret=ssl3_get_key_exchange(s);
369 if (ret <= 0) goto end;
370 s->state=SSL3_ST_CR_CERT_REQ_A;
371 s->init_num=0;
372
373 /* at this point we check that we have the
374 * required stuff from the server */
375 if (!ssl3_check_cert_and_algorithm(s))
376 {
377 ret= -1;
378 goto end;
379 }
380 break;
381
382 case SSL3_ST_CR_CERT_REQ_A:
383 case SSL3_ST_CR_CERT_REQ_B:
384 ret=ssl3_get_certificate_request(s);
385 if (ret <= 0) goto end;
386 s->state=SSL3_ST_CR_SRVR_DONE_A;
387 s->init_num=0;
388 break;
389
390 case SSL3_ST_CR_SRVR_DONE_A:
391 case SSL3_ST_CR_SRVR_DONE_B:
392 ret=ssl3_get_server_done(s);
393 if (ret <= 0) goto end;
394 #ifndef OPENSSL_NO_SRP
395 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP)
396 {
397 if ((ret = SRP_Calc_A_param(s))<=0)
398 {
399 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
400 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
401 goto end;
402 }
403 }
404 #endif
405 if (s->s3->tmp.cert_req)
406 s->state=SSL3_ST_CW_CERT_A;
407 else
408 s->state=SSL3_ST_CW_KEY_EXCH_A;
409 s->init_num=0;
410
411 break;
412
413 case SSL3_ST_CW_CERT_A:
414 case SSL3_ST_CW_CERT_B:
415 case SSL3_ST_CW_CERT_C:
416 case SSL3_ST_CW_CERT_D:
417 ret=ssl3_send_client_certificate(s);
418 if (ret <= 0) goto end;
419 s->state=SSL3_ST_CW_KEY_EXCH_A;
420 s->init_num=0;
421 break;
422
423 case SSL3_ST_CW_KEY_EXCH_A:
424 case SSL3_ST_CW_KEY_EXCH_B:
425 ret=ssl3_send_client_key_exchange(s);
426 if (ret <= 0) goto end;
427 /* EAY EAY EAY need to check for DH fix cert
428 * sent back */
429 /* For TLS, cert_req is set to 2, so a cert chain
430 * of nothing is sent, but no verify packet is sent */
431 /* XXX: For now, we do not support client
432 * authentication in ECDH cipher suites with
433 * ECDH (rather than ECDSA) certificates.
434 * We need to skip the certificate verify
435 * message when client's ECDH public key is sent
436 * inside the client certificate.
437 */
438 if (s->s3->tmp.cert_req == 1)
439 {
440 s->state=SSL3_ST_CW_CERT_VRFY_A;
441 }
442 else
443 {
444 s->state=SSL3_ST_CW_CHANGE_A;
445 s->s3->change_cipher_spec=0;
446 }
447 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
448 {
449 s->state=SSL3_ST_CW_CHANGE_A;
450 s->s3->change_cipher_spec=0;
451 }
452
453 s->init_num=0;
454 break;
455
456 case SSL3_ST_CW_CERT_VRFY_A:
457 case SSL3_ST_CW_CERT_VRFY_B:
458 ret=ssl3_send_client_verify(s);
459 if (ret <= 0) goto end;
460 s->state=SSL3_ST_CW_CHANGE_A;
461 s->init_num=0;
462 s->s3->change_cipher_spec=0;
463 break;
464
465 case SSL3_ST_CW_CHANGE_A:
466 case SSL3_ST_CW_CHANGE_B:
467 ret=ssl3_send_change_cipher_spec(s,
468 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
469 if (ret <= 0) goto end;
470
471 #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
472 s->state=SSL3_ST_CW_FINISHED_A;
473 #else
474 if (s->s3->next_proto_neg_seen)
475 s->state=SSL3_ST_CW_NEXT_PROTO_A;
476 else
477 s->state=SSL3_ST_CW_FINISHED_A;
478 #endif
479 s->init_num=0;
480
481 s->session->cipher=s->s3->tmp.new_cipher;
482 #ifdef OPENSSL_NO_COMP
483 s->session->compress_meth=0;
484 #else
485 if (s->s3->tmp.new_compression == NULL)
486 s->session->compress_meth=0;
487 else
488 s->session->compress_meth=
489 s->s3->tmp.new_compression->id;
490 #endif
491 if (!s->method->ssl3_enc->setup_key_block(s))
492 {
493 ret= -1;
494 goto end;
495 }
496
497 if (!s->method->ssl3_enc->change_cipher_state(s,
498 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
499 {
500 ret= -1;
501 goto end;
502 }
503
504 break;
505
506 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
507 case SSL3_ST_CW_NEXT_PROTO_A:
508 case SSL3_ST_CW_NEXT_PROTO_B:
509 ret=ssl3_send_next_proto(s);
510 if (ret <= 0) goto end;
511 s->state=SSL3_ST_CW_FINISHED_A;
512 break;
513 #endif
514
515 case SSL3_ST_CW_FINISHED_A:
516 case SSL3_ST_CW_FINISHED_B:
517 ret=ssl3_send_finished(s,
518 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
519 s->method->ssl3_enc->client_finished_label,
520 s->method->ssl3_enc->client_finished_label_len);
521 if (ret <= 0) goto end;
522 s->s3->flags |= SSL3_FLAGS_CCS_OK;
523 s->state=SSL3_ST_CW_FLUSH;
524
525 /* clear flags */
526 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
527 if (s->hit)
528 {
529 s->s3->tmp.next_state=SSL_ST_OK;
530 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
531 {
532 s->state=SSL_ST_OK;
533 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
534 s->s3->delay_buf_pop_ret=0;
535 }
536 }
537 else
538 {
539 #ifndef OPENSSL_NO_TLSEXT
540 /* Allow NewSessionTicket if ticket expected */
541 if (s->tlsext_ticket_expected)
542 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
543 else
544 #endif
545
546 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
547 }
548 s->init_num=0;
549 break;
550
551 #ifndef OPENSSL_NO_TLSEXT
552 case SSL3_ST_CR_SESSION_TICKET_A:
553 case SSL3_ST_CR_SESSION_TICKET_B:
554 ret=ssl3_get_new_session_ticket(s);
555 if (ret <= 0) goto end;
556 s->state=SSL3_ST_CR_FINISHED_A;
557 s->init_num=0;
558 break;
559
560 case SSL3_ST_CR_CERT_STATUS_A:
561 case SSL3_ST_CR_CERT_STATUS_B:
562 ret=ssl3_get_cert_status(s);
563 if (ret <= 0) goto end;
564 s->state=SSL3_ST_CR_KEY_EXCH_A;
565 s->init_num=0;
566 break;
567 #endif
568
569 case SSL3_ST_CR_FINISHED_A:
570 case SSL3_ST_CR_FINISHED_B:
571
572 s->s3->flags |= SSL3_FLAGS_CCS_OK;
573 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
574 SSL3_ST_CR_FINISHED_B);
575 if (ret <= 0) goto end;
576
577 if (s->hit)
578 s->state=SSL3_ST_CW_CHANGE_A;
579 else
580 s->state=SSL_ST_OK;
581 s->init_num=0;
582 break;
583
584 case SSL3_ST_CW_FLUSH:
585 s->rwstate=SSL_WRITING;
586 if (BIO_flush(s->wbio) <= 0)
587 {
588 ret= -1;
589 goto end;
590 }
591 s->rwstate=SSL_NOTHING;
592 s->state=s->s3->tmp.next_state;
593 break;
594
595 case SSL_ST_OK:
596 /* clean a few things up */
597 ssl3_cleanup_key_block(s);
598
599 if (s->init_buf != NULL)
600 {
601 BUF_MEM_free(s->init_buf);
602 s->init_buf=NULL;
603 }
604
605 /* If we are not 'joining' the last two packets,
606 * remove the buffering now */
607 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
608 ssl_free_wbio_buffer(s);
609 /* else do it later in ssl3_write */
610
611 s->init_num=0;
612 s->renegotiate=0;
613 s->new_session=0;
614
615 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
616 if (s->hit) s->ctx->stats.sess_hit++;
617
618 ret=1;
619 /* s->server=0; */
620 s->handshake_func=ssl3_connect;
621 s->ctx->stats.sess_connect_good++;
622
623 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
624
625 goto end;
626 /* break; */
627
628 default:
629 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
630 ret= -1;
631 goto end;
632 /* break; */
633 }
634
635 /* did we do anything */
636 if (!s->s3->tmp.reuse_message && !skip)
637 {
638 if (s->debug)
639 {
640 if ((ret=BIO_flush(s->wbio)) <= 0)
641 goto end;
642 }
643
644 if ((cb != NULL) && (s->state != state))
645 {
646 new_state=s->state;
647 s->state=state;
648 cb(s,SSL_CB_CONNECT_LOOP,1);
649 s->state=new_state;
650 }
651 }
652 skip=0;
653 }
654 end:
655 s->in_handshake--;
656 if (buf != NULL)
657 BUF_MEM_free(buf);
658 if (cb != NULL)
659 cb(s,SSL_CB_CONNECT_EXIT,ret);
660 return(ret);
661 }
662
663
664 int ssl3_client_hello(SSL *s)
665 {
666 unsigned char *buf;
667 unsigned char *p,*d;
668 int i;
669 unsigned long l;
670 int al = 0;
671 #ifndef OPENSSL_NO_COMP
672 int j;
673 SSL_COMP *comp;
674 #endif
675
676 buf=(unsigned char *)s->init_buf->data;
677 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
678 {
679 SSL_SESSION *sess = s->session;
680 if ((sess == NULL) ||
681 (sess->ssl_version != s->version) ||
682 #ifdef OPENSSL_NO_TLSEXT
683 !sess->session_id_length ||
684 #else
685 (!sess->session_id_length && !sess->tlsext_tick) ||
686 #endif
687 (sess->not_resumable))
688 {
689 if (!ssl_get_new_session(s,0))
690 goto err;
691 }
692 if (s->method->version == DTLS_ANY_VERSION)
693 {
694 /* Determine which DTLS version to use */
695 int options = s->options;
696 /* If DTLS 1.2 disabled correct the version number */
697 if (options & SSL_OP_NO_DTLSv1_2)
698 {
699 if (tls1_suiteb(s))
700 {
701 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
702 goto err;
703 }
704 /* Disabling all versions is silly: return an
705 * error.
706 */
707 if (options & SSL_OP_NO_DTLSv1)
708 {
709 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_WRONG_SSL_VERSION);
710 goto err;
711 }
712 /* Update method so we don't use any DTLS 1.2
713 * features.
714 */
715 s->method = DTLSv1_client_method();
716 s->version = DTLS1_VERSION;
717 }
718 else
719 {
720 /* We only support one version: update method */
721 if (options & SSL_OP_NO_DTLSv1)
722 s->method = DTLSv1_2_client_method();
723 s->version = DTLS1_2_VERSION;
724 }
725 s->client_version = s->version;
726 }
727 /* else use the pre-loaded session */
728
729 p=s->s3->client_random;
730
731 /* for DTLS if client_random is initialized, reuse it, we are
732 * required to use same upon reply to HelloVerify */
733 if (SSL_IS_DTLS(s))
734 {
735 size_t idx;
736 i = 1;
737 for (idx=0; idx < sizeof(s->s3->client_random); idx++)
738 {
739 if (p[idx])
740 {
741 i = 0;
742 break;
743 }
744 }
745 }
746 else
747 i = 1;
748
749 if (i)
750 ssl_fill_hello_random(s, 0, p,
751 sizeof(s->s3->client_random));
752
753 /* Do the message type and length last */
754 d=p= ssl_handshake_start(s);
755
756 /* version indicates the negotiated version: for example from
757 * an SSLv2/v3 compatible client hello). The client_version
758 * field is the maximum version we permit and it is also
759 * used in RSA encrypted premaster secrets. Some servers can
760 * choke if we initially report a higher version then
761 * renegotiate to a lower one in the premaster secret. This
762 * didn't happen with TLS 1.0 as most servers supported it
763 * but it can with TLS 1.1 or later if the server only supports
764 * 1.0.
765 *
766 * Possible scenario with previous logic:
767 * 1. Client hello indicates TLS 1.2
768 * 2. Server hello says TLS 1.0
769 * 3. RSA encrypted premaster secret uses 1.2.
770 * 4. Handhaked proceeds using TLS 1.0.
771 * 5. Server sends hello request to renegotiate.
772 * 6. Client hello indicates TLS v1.0 as we now
773 * know that is maximum server supports.
774 * 7. Server chokes on RSA encrypted premaster secret
775 * containing version 1.0.
776 *
777 * For interoperability it should be OK to always use the
778 * maximum version we support in client hello and then rely
779 * on the checking of version to ensure the servers isn't
780 * being inconsistent: for example initially negotiating with
781 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
782 * client_version in client hello and not resetting it to
783 * the negotiated version.
784 */
785 #if 0
786 *(p++)=s->version>>8;
787 *(p++)=s->version&0xff;
788 s->client_version=s->version;
789 #else
790 *(p++)=s->client_version>>8;
791 *(p++)=s->client_version&0xff;
792 #endif
793
794 /* Random stuff */
795 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
796 p+=SSL3_RANDOM_SIZE;
797
798 /* Session ID */
799 if (s->new_session)
800 i=0;
801 else
802 i=s->session->session_id_length;
803 *(p++)=i;
804 if (i != 0)
805 {
806 if (i > (int)sizeof(s->session->session_id))
807 {
808 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
809 goto err;
810 }
811 memcpy(p,s->session->session_id,i);
812 p+=i;
813 }
814
815 /* cookie stuff for DTLS */
816 if (SSL_IS_DTLS(s))
817 {
818 if ( s->d1->cookie_len > sizeof(s->d1->cookie))
819 {
820 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
821 goto err;
822 }
823 *(p++) = s->d1->cookie_len;
824 memcpy(p, s->d1->cookie, s->d1->cookie_len);
825 p += s->d1->cookie_len;
826 }
827
828 /* Ciphers supported */
829 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
830 if (i == 0)
831 {
832 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
833 goto err;
834 }
835 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
836 /* Some servers hang if client hello > 256 bytes
837 * as hack workaround chop number of supported ciphers
838 * to keep it well below this if we use TLS v1.2
839 */
840 if (TLS1_get_version(s) >= TLS1_2_VERSION
841 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
842 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
843 #endif
844 s2n(i,p);
845 p+=i;
846
847 /* COMPRESSION */
848 #ifdef OPENSSL_NO_COMP
849 *(p++)=1;
850 #else
851
852 if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
853 j=0;
854 else
855 j=sk_SSL_COMP_num(s->ctx->comp_methods);
856 *(p++)=1+j;
857 for (i=0; i<j; i++)
858 {
859 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
860 *(p++)=comp->id;
861 }
862 #endif
863 *(p++)=0; /* Add the NULL method */
864
865 #ifndef OPENSSL_NO_TLSEXT
866 /* TLS extensions*/
867 if (ssl_prepare_clienthello_tlsext(s) <= 0)
868 {
869 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
870 goto err;
871 }
872 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH, &al)) == NULL)
873 {
874 ssl3_send_alert(s,SSL3_AL_FATAL,al);
875 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
876 goto err;
877 }
878 #endif
879
880 l= p-d;
881 ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l);
882 s->state=SSL3_ST_CW_CLNT_HELLO_B;
883 }
884
885 /* SSL3_ST_CW_CLNT_HELLO_B */
886 return ssl_do_write(s);
887 err:
888 return(-1);
889 }
890
891 int ssl3_get_server_hello(SSL *s)
892 {
893 STACK_OF(SSL_CIPHER) *sk;
894 const SSL_CIPHER *c;
895 CERT *ct = s->cert;
896 unsigned char *p,*d;
897 int i,al=SSL_AD_INTERNAL_ERROR,ok;
898 unsigned int j;
899 long n;
900 #ifndef OPENSSL_NO_COMP
901 SSL_COMP *comp;
902 #endif
903 /* Hello verify request and/or server hello version may not
904 * match so set first packet if we're negotiating version.
905 */
906 if (SSL_IS_DTLS(s))
907 s->first_packet = 1;
908
909 n=s->method->ssl_get_message(s,
910 SSL3_ST_CR_SRVR_HELLO_A,
911 SSL3_ST_CR_SRVR_HELLO_B,
912 -1,
913 20000, /* ?? */
914 &ok);
915
916 if (!ok) return((int)n);
917
918 if (SSL_IS_DTLS(s))
919 {
920 s->first_packet = 0;
921 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
922 {
923 if ( s->d1->send_cookie == 0)
924 {
925 s->s3->tmp.reuse_message = 1;
926 return 1;
927 }
928 else /* already sent a cookie */
929 {
930 al=SSL_AD_UNEXPECTED_MESSAGE;
931 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
932 goto f_err;
933 }
934 }
935 }
936
937 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
938 {
939 al=SSL_AD_UNEXPECTED_MESSAGE;
940 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
941 goto f_err;
942 }
943
944 d=p=(unsigned char *)s->init_msg;
945 if (s->method->version == DTLS_ANY_VERSION)
946 {
947 /* Work out correct protocol version to use */
948 int hversion = (p[0] << 8)|p[1];
949 int options = s->options;
950 if (hversion == DTLS1_2_VERSION
951 && !(options & SSL_OP_NO_DTLSv1_2))
952 s->method = DTLSv1_2_client_method();
953 else if (tls1_suiteb(s))
954 {
955 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
956 s->version = hversion;
957 al = SSL_AD_PROTOCOL_VERSION;
958 goto f_err;
959 }
960 else if (hversion == DTLS1_VERSION
961 && !(options & SSL_OP_NO_DTLSv1))
962 s->method = DTLSv1_client_method();
963 else
964 {
965 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
966 s->version = hversion;
967 al = SSL_AD_PROTOCOL_VERSION;
968 goto f_err;
969 }
970 s->version = s->client_version = s->method->version;
971 }
972
973 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
974 {
975 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
976 s->version=(s->version&0xff00)|p[1];
977 al=SSL_AD_PROTOCOL_VERSION;
978 goto f_err;
979 }
980 p+=2;
981
982 /* load the server hello data */
983 /* load the server random */
984 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
985 p+=SSL3_RANDOM_SIZE;
986
987 s->hit = 0;
988
989 /* get the session-id */
990 j= *(p++);
991
992 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
993 {
994 al=SSL_AD_ILLEGAL_PARAMETER;
995 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
996 goto f_err;
997 }
998
999 #ifndef OPENSSL_NO_TLSEXT
1000 /* check if we want to resume the session based on external pre-shared secret */
1001 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
1002 {
1003 SSL_CIPHER *pref_cipher=NULL;
1004 s->session->master_key_length=sizeof(s->session->master_key);
1005 if (s->tls_session_secret_cb(s, s->session->master_key,
1006 &s->session->master_key_length,
1007 NULL, &pref_cipher,
1008 s->tls_session_secret_cb_arg))
1009 {
1010 s->session->cipher = pref_cipher ?
1011 pref_cipher : ssl_get_cipher_by_char(s, p+j);
1012 s->hit = 1;
1013 s->s3->flags |= SSL3_FLAGS_CCS_OK;
1014 }
1015 }
1016 #endif /* OPENSSL_NO_TLSEXT */
1017
1018 if (!s->hit && j != 0 && j == s->session->session_id_length
1019 && memcmp(p,s->session->session_id,j) == 0)
1020 {
1021 if(s->sid_ctx_length != s->session->sid_ctx_length
1022 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
1023 {
1024 /* actually a client application bug */
1025 al=SSL_AD_ILLEGAL_PARAMETER;
1026 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
1027 goto f_err;
1028 }
1029 s->s3->flags |= SSL3_FLAGS_CCS_OK;
1030 s->hit=1;
1031 }
1032 /* a miss or crap from the other end */
1033 if (!s->hit)
1034 {
1035 /* If we were trying for session-id reuse, make a new
1036 * SSL_SESSION so we don't stuff up other people */
1037 if (s->session->session_id_length > 0)
1038 {
1039 if (!ssl_get_new_session(s,0))
1040 {
1041 goto f_err;
1042 }
1043 }
1044 s->session->session_id_length=j;
1045 memcpy(s->session->session_id,p,j); /* j could be 0 */
1046 }
1047 p+=j;
1048 c=ssl_get_cipher_by_char(s,p);
1049 if (c == NULL)
1050 {
1051 /* unknown cipher */
1052 al=SSL_AD_ILLEGAL_PARAMETER;
1053 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
1054 goto f_err;
1055 }
1056 /* Set version disabled mask now we know version */
1057 if (!SSL_USE_TLS1_2_CIPHERS(s))
1058 ct->mask_ssl = SSL_TLSV1_2;
1059 else
1060 ct->mask_ssl = 0;
1061 /* If it is a disabled cipher we didn't send it in client hello,
1062 * so return an error.
1063 */
1064 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK))
1065 {
1066 al=SSL_AD_ILLEGAL_PARAMETER;
1067 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1068 goto f_err;
1069 }
1070 p+=ssl_put_cipher_by_char(s,NULL,NULL);
1071
1072 sk=ssl_get_ciphers_by_id(s);
1073 i=sk_SSL_CIPHER_find(sk,c);
1074 if (i < 0)
1075 {
1076 /* we did not say we would use this cipher */
1077 al=SSL_AD_ILLEGAL_PARAMETER;
1078 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1079 goto f_err;
1080 }
1081
1082 /* Depending on the session caching (internal/external), the cipher
1083 and/or cipher_id values may not be set. Make sure that
1084 cipher_id is set and use it for comparison. */
1085 if (s->session->cipher)
1086 s->session->cipher_id = s->session->cipher->id;
1087 if (s->hit && (s->session->cipher_id != c->id))
1088 {
1089 /* Workaround is now obsolete */
1090 #if 0
1091 if (!(s->options &
1092 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
1093 #endif
1094 {
1095 al=SSL_AD_ILLEGAL_PARAMETER;
1096 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1097 goto f_err;
1098 }
1099 }
1100 s->s3->tmp.new_cipher=c;
1101 /* Don't digest cached records if no sigalgs: we may need them for
1102 * client authentication.
1103 */
1104 if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s))
1105 goto f_err;
1106 /* lets get the compression algorithm */
1107 /* COMPRESSION */
1108 #ifdef OPENSSL_NO_COMP
1109 if (*(p++) != 0)
1110 {
1111 al=SSL_AD_ILLEGAL_PARAMETER;
1112 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1113 goto f_err;
1114 }
1115 /* If compression is disabled we'd better not try to resume a session
1116 * using compression.
1117 */
1118 if (s->session->compress_meth != 0)
1119 {
1120 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1121 goto f_err;
1122 }
1123 #else
1124 j= *(p++);
1125 if (s->hit && j != s->session->compress_meth)
1126 {
1127 al=SSL_AD_ILLEGAL_PARAMETER;
1128 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1129 goto f_err;
1130 }
1131 if (j == 0)
1132 comp=NULL;
1133 else if (!ssl_allow_compression(s))
1134 {
1135 al=SSL_AD_ILLEGAL_PARAMETER;
1136 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1137 goto f_err;
1138 }
1139 else
1140 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1141
1142 if ((j != 0) && (comp == NULL))
1143 {
1144 al=SSL_AD_ILLEGAL_PARAMETER;
1145 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1146 goto f_err;
1147 }
1148 else
1149 {
1150 s->s3->tmp.new_compression=comp;
1151 }
1152 #endif
1153
1154 #ifndef OPENSSL_NO_TLSEXT
1155 /* TLS extensions*/
1156 if (!ssl_parse_serverhello_tlsext(s,&p,d,n))
1157 {
1158 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1159 goto err;
1160 }
1161 #endif
1162
1163 if (p != (d+n))
1164 {
1165 /* wrong packet length */
1166 al=SSL_AD_DECODE_ERROR;
1167 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1168 goto f_err;
1169 }
1170
1171 return(1);
1172 f_err:
1173 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1174 err:
1175 return(-1);
1176 }
1177
1178 int ssl3_get_server_certificate(SSL *s)
1179 {
1180 int al,i,ok,ret= -1;
1181 unsigned long n,nc,llen,l;
1182 X509 *x=NULL;
1183 const unsigned char *q,*p;
1184 unsigned char *d;
1185 STACK_OF(X509) *sk=NULL;
1186 SESS_CERT *sc;
1187 EVP_PKEY *pkey=NULL;
1188 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1189
1190 n=s->method->ssl_get_message(s,
1191 SSL3_ST_CR_CERT_A,
1192 SSL3_ST_CR_CERT_B,
1193 -1,
1194 s->max_cert_list,
1195 &ok);
1196
1197 if (!ok) return((int)n);
1198
1199 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1200 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1201 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1202 {
1203 s->s3->tmp.reuse_message=1;
1204 return(1);
1205 }
1206
1207 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1208 {
1209 al=SSL_AD_UNEXPECTED_MESSAGE;
1210 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1211 goto f_err;
1212 }
1213 p=d=(unsigned char *)s->init_msg;
1214
1215 if ((sk=sk_X509_new_null()) == NULL)
1216 {
1217 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1218 goto err;
1219 }
1220
1221 n2l3(p,llen);
1222 if (llen+3 != n)
1223 {
1224 al=SSL_AD_DECODE_ERROR;
1225 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1226 goto f_err;
1227 }
1228 for (nc=0; nc<llen; )
1229 {
1230 n2l3(p,l);
1231 if ((l+nc+3) > llen)
1232 {
1233 al=SSL_AD_DECODE_ERROR;
1234 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1235 goto f_err;
1236 }
1237
1238 q=p;
1239 x=d2i_X509(NULL,&q,l);
1240 if (x == NULL)
1241 {
1242 al=SSL_AD_BAD_CERTIFICATE;
1243 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1244 goto f_err;
1245 }
1246 if (q != (p+l))
1247 {
1248 al=SSL_AD_DECODE_ERROR;
1249 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1250 goto f_err;
1251 }
1252 if (!sk_X509_push(sk,x))
1253 {
1254 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1255 goto err;
1256 }
1257 x=NULL;
1258 nc+=l+3;
1259 p=q;
1260 }
1261
1262 i=ssl_verify_cert_chain(s,sk);
1263 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1264 #ifndef OPENSSL_NO_KRB5
1265 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1266 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1267 #endif /* OPENSSL_NO_KRB5 */
1268 )
1269 {
1270 al=ssl_verify_alarm_type(s->verify_result);
1271 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1272 goto f_err;
1273 }
1274 ERR_clear_error(); /* but we keep s->verify_result */
1275 if (i > 1)
1276 {
1277 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, i);
1278 al = SSL_AD_HANDSHAKE_FAILURE;
1279 goto f_err;
1280 }
1281
1282 sc=ssl_sess_cert_new();
1283 if (sc == NULL) goto err;
1284
1285 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1286 s->session->sess_cert=sc;
1287
1288 sc->cert_chain=sk;
1289 /* Inconsistency alert: cert_chain does include the peer's
1290 * certificate, which we don't include in s3_srvr.c */
1291 x=sk_X509_value(sk,0);
1292 sk=NULL;
1293 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1294
1295 pkey=X509_get_pubkey(x);
1296
1297 /* VRS: allow null cert if auth == KRB5 */
1298 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1299 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1300 ? 0 : 1;
1301
1302 #ifdef KSSL_DEBUG
1303 printf("pkey,x = %p, %p\n", pkey,x);
1304 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1305 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1306 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1307 #endif /* KSSL_DEBUG */
1308
1309 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1310 {
1311 x=NULL;
1312 al=SSL3_AL_FATAL;
1313 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1314 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1315 goto f_err;
1316 }
1317
1318 i=ssl_cert_type(x,pkey);
1319 if (need_cert && i < 0)
1320 {
1321 x=NULL;
1322 al=SSL3_AL_FATAL;
1323 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1324 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1325 goto f_err;
1326 }
1327
1328 if (need_cert)
1329 {
1330 int exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1331 if (exp_idx >= 0 && i != exp_idx)
1332 {
1333 x=NULL;
1334 al=SSL_AD_ILLEGAL_PARAMETER;
1335 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1336 SSL_R_WRONG_CERTIFICATE_TYPE);
1337 goto f_err;
1338 }
1339 sc->peer_cert_type=i;
1340 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1341 /* Why would the following ever happen?
1342 * We just created sc a couple of lines ago. */
1343 if (sc->peer_pkeys[i].x509 != NULL)
1344 X509_free(sc->peer_pkeys[i].x509);
1345 sc->peer_pkeys[i].x509=x;
1346 sc->peer_key= &(sc->peer_pkeys[i]);
1347
1348 if (s->session->peer != NULL)
1349 X509_free(s->session->peer);
1350 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1351 s->session->peer=x;
1352 }
1353 else
1354 {
1355 sc->peer_cert_type=i;
1356 sc->peer_key= NULL;
1357
1358 if (s->session->peer != NULL)
1359 X509_free(s->session->peer);
1360 s->session->peer=NULL;
1361 }
1362 s->session->verify_result = s->verify_result;
1363
1364 x=NULL;
1365 ret=1;
1366 if (0)
1367 {
1368 f_err:
1369 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1370 }
1371 err:
1372 EVP_PKEY_free(pkey);
1373 X509_free(x);
1374 sk_X509_pop_free(sk,X509_free);
1375 return(ret);
1376 }
1377
1378 int ssl3_get_key_exchange(SSL *s)
1379 {
1380 #ifndef OPENSSL_NO_RSA
1381 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1382 #endif
1383 EVP_MD_CTX md_ctx;
1384 unsigned char *param,*p;
1385 int al,j,ok;
1386 long i,param_len,n,alg_k,alg_a;
1387 EVP_PKEY *pkey=NULL;
1388 const EVP_MD *md = NULL;
1389 #ifndef OPENSSL_NO_RSA
1390 RSA *rsa=NULL;
1391 #endif
1392 #ifndef OPENSSL_NO_DH
1393 DH *dh=NULL;
1394 #endif
1395 #ifndef OPENSSL_NO_ECDH
1396 EC_KEY *ecdh = NULL;
1397 BN_CTX *bn_ctx = NULL;
1398 EC_POINT *srvr_ecpoint = NULL;
1399 int curve_nid = 0;
1400 int encoded_pt_len = 0;
1401 #endif
1402
1403 /* use same message size as in ssl3_get_certificate_request()
1404 * as ServerKeyExchange message may be skipped */
1405 n=s->method->ssl_get_message(s,
1406 SSL3_ST_CR_KEY_EXCH_A,
1407 SSL3_ST_CR_KEY_EXCH_B,
1408 -1,
1409 s->max_cert_list,
1410 &ok);
1411 if (!ok) return((int)n);
1412
1413 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1414 {
1415 #ifndef OPENSSL_NO_PSK
1416 /* In plain PSK ciphersuite, ServerKeyExchange can be
1417 omitted if no identity hint is sent. Set
1418 session->sess_cert anyway to avoid problems
1419 later.*/
1420 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1421 {
1422 s->session->sess_cert=ssl_sess_cert_new();
1423 if (s->ctx->psk_identity_hint)
1424 OPENSSL_free(s->ctx->psk_identity_hint);
1425 s->ctx->psk_identity_hint = NULL;
1426 }
1427 #endif
1428 s->s3->tmp.reuse_message=1;
1429 return(1);
1430 }
1431
1432 param=p=(unsigned char *)s->init_msg;
1433 if (s->session->sess_cert != NULL)
1434 {
1435 #ifndef OPENSSL_NO_RSA
1436 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1437 {
1438 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1439 s->session->sess_cert->peer_rsa_tmp=NULL;
1440 }
1441 #endif
1442 #ifndef OPENSSL_NO_DH
1443 if (s->session->sess_cert->peer_dh_tmp)
1444 {
1445 DH_free(s->session->sess_cert->peer_dh_tmp);
1446 s->session->sess_cert->peer_dh_tmp=NULL;
1447 }
1448 #endif
1449 #ifndef OPENSSL_NO_ECDH
1450 if (s->session->sess_cert->peer_ecdh_tmp)
1451 {
1452 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1453 s->session->sess_cert->peer_ecdh_tmp=NULL;
1454 }
1455 #endif
1456 }
1457 else
1458 {
1459 s->session->sess_cert=ssl_sess_cert_new();
1460 }
1461
1462 /* Total length of the parameters including the length prefix */
1463 param_len=0;
1464
1465 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1466 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1467 EVP_MD_CTX_init(&md_ctx);
1468
1469 al=SSL_AD_DECODE_ERROR;
1470
1471 #ifndef OPENSSL_NO_PSK
1472 if (alg_k & SSL_kPSK)
1473 {
1474 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1475
1476 param_len = 2;
1477 if (param_len > n)
1478 {
1479 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1480 SSL_R_LENGTH_TOO_SHORT);
1481 goto f_err;
1482 }
1483 n2s(p,i);
1484
1485 /* Store PSK identity hint for later use, hint is used
1486 * in ssl3_send_client_key_exchange. Assume that the
1487 * maximum length of a PSK identity hint can be as
1488 * long as the maximum length of a PSK identity. */
1489 if (i > PSK_MAX_IDENTITY_LEN)
1490 {
1491 al=SSL_AD_HANDSHAKE_FAILURE;
1492 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1493 SSL_R_DATA_LENGTH_TOO_LONG);
1494 goto f_err;
1495 }
1496 if (i > n - param_len)
1497 {
1498 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1499 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1500 goto f_err;
1501 }
1502 param_len += i;
1503
1504 /* If received PSK identity hint contains NULL
1505 * characters, the hint is truncated from the first
1506 * NULL. p may not be ending with NULL, so create a
1507 * NULL-terminated string. */
1508 memcpy(tmp_id_hint, p, i);
1509 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1510 if (s->ctx->psk_identity_hint != NULL)
1511 OPENSSL_free(s->ctx->psk_identity_hint);
1512 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1513 if (s->ctx->psk_identity_hint == NULL)
1514 {
1515 al=SSL_AD_HANDSHAKE_FAILURE;
1516 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1517 goto f_err;
1518 }
1519
1520 p+=i;
1521 n-=param_len;
1522 }
1523 else
1524 #endif /* !OPENSSL_NO_PSK */
1525 #ifndef OPENSSL_NO_SRP
1526 if (alg_k & SSL_kSRP)
1527 {
1528 param_len = 2;
1529 if (param_len > n)
1530 {
1531 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1532 SSL_R_LENGTH_TOO_SHORT);
1533 goto f_err;
1534 }
1535 n2s(p,i);
1536
1537 if (i > n - param_len)
1538 {
1539 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1540 goto f_err;
1541 }
1542 param_len += i;
1543
1544 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1545 {
1546 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1547 goto err;
1548 }
1549 p+=i;
1550
1551
1552 if (2 > n - param_len)
1553 {
1554 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1555 SSL_R_LENGTH_TOO_SHORT);
1556 goto f_err;
1557 }
1558 param_len += 2;
1559
1560 n2s(p,i);
1561
1562 if (i > n - param_len)
1563 {
1564 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1565 goto f_err;
1566 }
1567 param_len += i;
1568
1569 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1570 {
1571 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1572 goto err;
1573 }
1574 p+=i;
1575
1576
1577 if (1 > n - param_len)
1578 {
1579 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1580 SSL_R_LENGTH_TOO_SHORT);
1581 goto f_err;
1582 }
1583 param_len += 1;
1584
1585 i = (unsigned int)(p[0]);
1586 p++;
1587
1588 if (i > n - param_len)
1589 {
1590 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1591 goto f_err;
1592 }
1593 param_len += i;
1594
1595 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1596 {
1597 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1598 goto err;
1599 }
1600 p+=i;
1601
1602 if (2 > n - param_len)
1603 {
1604 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1605 SSL_R_LENGTH_TOO_SHORT);
1606 goto f_err;
1607 }
1608 param_len += 2;
1609
1610 n2s(p,i);
1611
1612 if (i > n - param_len)
1613 {
1614 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1615 goto f_err;
1616 }
1617 param_len += i;
1618
1619 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1620 {
1621 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1622 goto err;
1623 }
1624 p+=i;
1625 n-=param_len;
1626
1627 if (!srp_verify_server_param(s, &al))
1628 {
1629 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_PARAMETERS);
1630 goto f_err;
1631 }
1632
1633 /* We must check if there is a certificate */
1634 #ifndef OPENSSL_NO_RSA
1635 if (alg_a & SSL_aRSA)
1636 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1637 #else
1638 if (0)
1639 ;
1640 #endif
1641 #ifndef OPENSSL_NO_DSA
1642 else if (alg_a & SSL_aDSS)
1643 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1644 #endif
1645 }
1646 else
1647 #endif /* !OPENSSL_NO_SRP */
1648 #ifndef OPENSSL_NO_RSA
1649 if (alg_k & SSL_kRSA)
1650 {
1651 if ((rsa=RSA_new()) == NULL)
1652 {
1653 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1654 goto err;
1655 }
1656
1657 param_len = 2;
1658 if (param_len > n)
1659 {
1660 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1661 SSL_R_LENGTH_TOO_SHORT);
1662 goto f_err;
1663 }
1664 n2s(p,i);
1665
1666 if (i > n - param_len)
1667 {
1668 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1669 goto f_err;
1670 }
1671 param_len += i;
1672
1673 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1674 {
1675 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1676 goto err;
1677 }
1678 p+=i;
1679
1680 if (2 > n - param_len)
1681 {
1682 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1683 SSL_R_LENGTH_TOO_SHORT);
1684 goto f_err;
1685 }
1686 param_len += 2;
1687
1688 n2s(p,i);
1689
1690 if (i > n - param_len)
1691 {
1692 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1693 goto f_err;
1694 }
1695 param_len += i;
1696
1697 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1698 {
1699 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1700 goto err;
1701 }
1702 p+=i;
1703 n-=param_len;
1704
1705 /* this should be because we are using an export cipher */
1706 if (alg_a & SSL_aRSA)
1707 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1708 else
1709 {
1710 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1711 goto err;
1712 }
1713 s->session->sess_cert->peer_rsa_tmp=rsa;
1714 rsa=NULL;
1715 }
1716 #else /* OPENSSL_NO_RSA */
1717 if (0)
1718 ;
1719 #endif
1720 #ifndef OPENSSL_NO_DH
1721 else if (alg_k & SSL_kDHE)
1722 {
1723 if ((dh=DH_new()) == NULL)
1724 {
1725 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1726 goto err;
1727 }
1728
1729 param_len = 2;
1730 if (param_len > n)
1731 {
1732 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1733 SSL_R_LENGTH_TOO_SHORT);
1734 goto f_err;
1735 }
1736 n2s(p,i);
1737
1738 if (i > n - param_len)
1739 {
1740 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1741 goto f_err;
1742 }
1743 param_len += i;
1744
1745 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1746 {
1747 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1748 goto err;
1749 }
1750 p+=i;
1751
1752 if (2 > n - param_len)
1753 {
1754 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1755 SSL_R_LENGTH_TOO_SHORT);
1756 goto f_err;
1757 }
1758 param_len += 2;
1759
1760 n2s(p,i);
1761
1762 if (i > n - param_len)
1763 {
1764 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1765 goto f_err;
1766 }
1767 param_len += i;
1768
1769 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1770 {
1771 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1772 goto err;
1773 }
1774 p+=i;
1775
1776 if (2 > n - param_len)
1777 {
1778 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1779 SSL_R_LENGTH_TOO_SHORT);
1780 goto f_err;
1781 }
1782 param_len += 2;
1783
1784 n2s(p,i);
1785
1786 if (i > n - param_len)
1787 {
1788 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1789 goto f_err;
1790 }
1791 param_len += i;
1792
1793 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1794 {
1795 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1796 goto err;
1797 }
1798 p+=i;
1799 n-=param_len;
1800
1801 if (!ssl_security(s, SSL_SECOP_TMP_DH,
1802 DH_security_bits(dh), 0, dh))
1803 {
1804 al=SSL_AD_HANDSHAKE_FAILURE;
1805 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_DH_KEY_TOO_SMALL);
1806 goto f_err;
1807 }
1808
1809 #ifndef OPENSSL_NO_RSA
1810 if (alg_a & SSL_aRSA)
1811 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1812 #else
1813 if (0)
1814 ;
1815 #endif
1816 #ifndef OPENSSL_NO_DSA
1817 else if (alg_a & SSL_aDSS)
1818 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1819 #endif
1820 /* else anonymous DH, so no certificate or pkey. */
1821
1822 s->session->sess_cert->peer_dh_tmp=dh;
1823 dh=NULL;
1824 }
1825 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1826 {
1827 al=SSL_AD_ILLEGAL_PARAMETER;
1828 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1829 goto f_err;
1830 }
1831 #endif /* !OPENSSL_NO_DH */
1832
1833 #ifndef OPENSSL_NO_ECDH
1834 else if (alg_k & SSL_kECDHE)
1835 {
1836 EC_GROUP *ngroup;
1837 const EC_GROUP *group;
1838
1839 if ((ecdh=EC_KEY_new()) == NULL)
1840 {
1841 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1842 goto err;
1843 }
1844
1845 /* Extract elliptic curve parameters and the
1846 * server's ephemeral ECDH public key.
1847 * Keep accumulating lengths of various components in
1848 * param_len and make sure it never exceeds n.
1849 */
1850
1851 /* XXX: For now we only support named (not generic) curves
1852 * and the ECParameters in this case is just three bytes. We
1853 * also need one byte for the length of the encoded point
1854 */
1855 param_len=4;
1856 if (param_len > n)
1857 {
1858 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1859 SSL_R_LENGTH_TOO_SHORT);
1860 goto f_err;
1861 }
1862 /* Check curve is one of our preferences, if not server has
1863 * sent an invalid curve. ECParameters is 3 bytes.
1864 */
1865 if (!tls1_check_curve(s, p, 3))
1866 {
1867 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_CURVE);
1868 goto f_err;
1869 }
1870
1871 if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)
1872 {
1873 al=SSL_AD_INTERNAL_ERROR;
1874 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1875 goto f_err;
1876 }
1877
1878 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1879 if (ngroup == NULL)
1880 {
1881 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1882 goto err;
1883 }
1884 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1885 {
1886 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1887 goto err;
1888 }
1889 EC_GROUP_free(ngroup);
1890
1891 group = EC_KEY_get0_group(ecdh);
1892
1893 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1894 (EC_GROUP_get_degree(group) > 163))
1895 {
1896 al=SSL_AD_EXPORT_RESTRICTION;
1897 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1898 goto f_err;
1899 }
1900
1901 p+=3;
1902
1903 /* Next, get the encoded ECPoint */
1904 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1905 ((bn_ctx = BN_CTX_new()) == NULL))
1906 {
1907 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1908 goto err;
1909 }
1910
1911 encoded_pt_len = *p; /* length of encoded point */
1912 p+=1;
1913
1914 if ((encoded_pt_len > n - param_len) ||
1915 (EC_POINT_oct2point(group, srvr_ecpoint,
1916 p, encoded_pt_len, bn_ctx) == 0))
1917 {
1918 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1919 goto f_err;
1920 }
1921 param_len += encoded_pt_len;
1922
1923 n-=param_len;
1924 p+=encoded_pt_len;
1925
1926 /* The ECC/TLS specification does not mention
1927 * the use of DSA to sign ECParameters in the server
1928 * key exchange message. We do support RSA and ECDSA.
1929 */
1930 if (0) ;
1931 #ifndef OPENSSL_NO_RSA
1932 else if (alg_a & SSL_aRSA)
1933 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1934 #endif
1935 #ifndef OPENSSL_NO_ECDSA
1936 else if (alg_a & SSL_aECDSA)
1937 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1938 #endif
1939 /* else anonymous ECDH, so no certificate or pkey. */
1940 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1941 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1942 ecdh=NULL;
1943 BN_CTX_free(bn_ctx);
1944 bn_ctx = NULL;
1945 EC_POINT_free(srvr_ecpoint);
1946 srvr_ecpoint = NULL;
1947 }
1948 else if (alg_k)
1949 {
1950 al=SSL_AD_UNEXPECTED_MESSAGE;
1951 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1952 goto f_err;
1953 }
1954 #endif /* !OPENSSL_NO_ECDH */
1955
1956
1957 /* p points to the next byte, there are 'n' bytes left */
1958
1959 /* if it was signed, check the signature */
1960 if (pkey != NULL)
1961 {
1962 if (SSL_USE_SIGALGS(s))
1963 {
1964 int rv;
1965 if (2 > n)
1966 {
1967 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1968 SSL_R_LENGTH_TOO_SHORT);
1969 goto f_err;
1970 }
1971 rv = tls12_check_peer_sigalg(&md, s, p, pkey);
1972 if (rv == -1)
1973 goto err;
1974 else if (rv == 0)
1975 {
1976 goto f_err;
1977 }
1978 #ifdef SSL_DEBUG
1979 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1980 #endif
1981 p += 2;
1982 n -= 2;
1983 }
1984 else
1985 md = EVP_sha1();
1986
1987 if (2 > n)
1988 {
1989 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1990 SSL_R_LENGTH_TOO_SHORT);
1991 goto f_err;
1992 }
1993 n2s(p,i);
1994 n-=2;
1995 j=EVP_PKEY_size(pkey);
1996
1997 /* Check signature length. If n is 0 then signature is empty */
1998 if ((i != n) || (n > j) || (n <= 0))
1999 {
2000 /* wrong packet length */
2001 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
2002 goto f_err;
2003 }
2004
2005 #ifndef OPENSSL_NO_RSA
2006 if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s))
2007 {
2008 int num;
2009 unsigned int size;
2010
2011 j=0;
2012 q=md_buf;
2013 for (num=2; num > 0; num--)
2014 {
2015 EVP_MD_CTX_set_flags(&md_ctx,
2016 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
2017 EVP_DigestInit_ex(&md_ctx,(num == 2)
2018 ?s->ctx->md5:s->ctx->sha1, NULL);
2019 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
2020 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
2021 EVP_DigestUpdate(&md_ctx,param,param_len);
2022 EVP_DigestFinal_ex(&md_ctx,q,&size);
2023 q+=size;
2024 j+=size;
2025 }
2026 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
2027 pkey->pkey.rsa);
2028 if (i < 0)
2029 {
2030 al=SSL_AD_DECRYPT_ERROR;
2031 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
2032 goto f_err;
2033 }
2034 if (i == 0)
2035 {
2036 /* bad signature */
2037 al=SSL_AD_DECRYPT_ERROR;
2038 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
2039 goto f_err;
2040 }
2041 }
2042 else
2043 #endif
2044 {
2045 EVP_VerifyInit_ex(&md_ctx, md, NULL);
2046 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
2047 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
2048 EVP_VerifyUpdate(&md_ctx,param,param_len);
2049 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
2050 {
2051 /* bad signature */
2052 al=SSL_AD_DECRYPT_ERROR;
2053 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
2054 goto f_err;
2055 }
2056 }
2057 }
2058 else
2059 {
2060 /* aNULL, aSRP or kPSK do not need public keys */
2061 if (!(alg_a & (SSL_aNULL|SSL_aSRP)) && !(alg_k & SSL_kPSK))
2062 {
2063 /* Might be wrong key type, check it */
2064 if (ssl3_check_cert_and_algorithm(s))
2065 /* Otherwise this shouldn't happen */
2066 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2067 goto err;
2068 }
2069 /* still data left over */
2070 if (n != 0)
2071 {
2072 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
2073 goto f_err;
2074 }
2075 }
2076 EVP_PKEY_free(pkey);
2077 EVP_MD_CTX_cleanup(&md_ctx);
2078 return(1);
2079 f_err:
2080 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2081 err:
2082 EVP_PKEY_free(pkey);
2083 #ifndef OPENSSL_NO_RSA
2084 if (rsa != NULL)
2085 RSA_free(rsa);
2086 #endif
2087 #ifndef OPENSSL_NO_DH
2088 if (dh != NULL)
2089 DH_free(dh);
2090 #endif
2091 #ifndef OPENSSL_NO_ECDH
2092 BN_CTX_free(bn_ctx);
2093 EC_POINT_free(srvr_ecpoint);
2094 if (ecdh != NULL)
2095 EC_KEY_free(ecdh);
2096 #endif
2097 EVP_MD_CTX_cleanup(&md_ctx);
2098 return(-1);
2099 }
2100
2101 int ssl3_get_certificate_request(SSL *s)
2102 {
2103 int ok,ret=0;
2104 unsigned long n,nc,l;
2105 unsigned int llen, ctype_num,i;
2106 X509_NAME *xn=NULL;
2107 const unsigned char *p,*q;
2108 unsigned char *d;
2109 STACK_OF(X509_NAME) *ca_sk=NULL;
2110
2111 n=s->method->ssl_get_message(s,
2112 SSL3_ST_CR_CERT_REQ_A,
2113 SSL3_ST_CR_CERT_REQ_B,
2114 -1,
2115 s->max_cert_list,
2116 &ok);
2117
2118 if (!ok) return((int)n);
2119
2120 s->s3->tmp.cert_req=0;
2121
2122 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
2123 {
2124 s->s3->tmp.reuse_message=1;
2125 /* If we get here we don't need any cached handshake records
2126 * as we wont be doing client auth.
2127 */
2128 if (s->s3->handshake_buffer)
2129 {
2130 if (!ssl3_digest_cached_records(s))
2131 goto err;
2132 }
2133 return(1);
2134 }
2135
2136 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
2137 {
2138 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2139 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
2140 goto err;
2141 }
2142
2143 /* TLS does not like anon-DH with client cert */
2144 if (s->version > SSL3_VERSION)
2145 {
2146 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
2147 {
2148 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2149 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
2150 goto err;
2151 }
2152 }
2153
2154 p=d=(unsigned char *)s->init_msg;
2155
2156 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
2157 {
2158 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2159 goto err;
2160 }
2161
2162 /* get the certificate types */
2163 ctype_num= *(p++);
2164 if (s->cert->ctypes)
2165 {
2166 OPENSSL_free(s->cert->ctypes);
2167 s->cert->ctypes = NULL;
2168 }
2169 if (ctype_num > SSL3_CT_NUMBER)
2170 {
2171 /* If we exceed static buffer copy all to cert structure */
2172 s->cert->ctypes = OPENSSL_malloc(ctype_num);
2173 memcpy(s->cert->ctypes, p, ctype_num);
2174 s->cert->ctype_num = (size_t)ctype_num;
2175 ctype_num=SSL3_CT_NUMBER;
2176 }
2177 for (i=0; i<ctype_num; i++)
2178 s->s3->tmp.ctype[i]= p[i];
2179 p+=p[-1];
2180 if (SSL_USE_SIGALGS(s))
2181 {
2182 n2s(p, llen);
2183 /* Check we have enough room for signature algorithms and
2184 * following length value.
2185 */
2186 if ((unsigned long)(p - d + llen + 2) > n)
2187 {
2188 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2189 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
2190 goto err;
2191 }
2192 /* Clear certificate digests and validity flags */
2193 for (i = 0; i < SSL_PKEY_NUM; i++)
2194 {
2195 s->cert->pkeys[i].digest = NULL;
2196 s->cert->pkeys[i].valid_flags = 0;
2197 }
2198 if ((llen & 1) || !tls1_save_sigalgs(s, p, llen))
2199 {
2200 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2201 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2202 goto err;
2203 }
2204 if (!tls1_process_sigalgs(s))
2205 {
2206 ssl3_send_alert(s,SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2207 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
2208 goto err;
2209 }
2210 p += llen;
2211 }
2212
2213 /* get the CA RDNs */
2214 n2s(p,llen);
2215 #if 0
2216 {
2217 FILE *out;
2218 out=fopen("/tmp/vsign.der","w");
2219 fwrite(p,1,llen,out);
2220 fclose(out);
2221 }
2222 #endif
2223
2224 if ((unsigned long)(p - d + llen) != n)
2225 {
2226 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2227 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
2228 goto err;
2229 }
2230
2231 for (nc=0; nc<llen; )
2232 {
2233 n2s(p,l);
2234 if ((l+nc+2) > llen)
2235 {
2236 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
2237 goto cont; /* netscape bugs */
2238 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2239 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
2240 goto err;
2241 }
2242
2243 q=p;
2244
2245 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
2246 {
2247 /* If netscape tolerance is on, ignore errors */
2248 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
2249 goto cont;
2250 else
2251 {
2252 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2253 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
2254 goto err;
2255 }
2256 }
2257
2258 if (q != (p+l))
2259 {
2260 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2261 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
2262 goto err;
2263 }
2264 if (!sk_X509_NAME_push(ca_sk,xn))
2265 {
2266 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2267 goto err;
2268 }
2269
2270 p+=l;
2271 nc+=l+2;
2272 }
2273
2274 if (0)
2275 {
2276 cont:
2277 ERR_clear_error();
2278 }
2279
2280 /* we should setup a certificate to return.... */
2281 s->s3->tmp.cert_req=1;
2282 s->s3->tmp.ctype_num=ctype_num;
2283 if (s->s3->tmp.ca_names != NULL)
2284 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2285 s->s3->tmp.ca_names=ca_sk;
2286 ca_sk=NULL;
2287
2288 ret=1;
2289 err:
2290 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2291 return(ret);
2292 }
2293
2294 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2295 {
2296 return(X509_NAME_cmp(*a,*b));
2297 }
2298 #ifndef OPENSSL_NO_TLSEXT
2299 int ssl3_get_new_session_ticket(SSL *s)
2300 {
2301 int ok,al,ret=0, ticklen;
2302 long n;
2303 const unsigned char *p;
2304 unsigned char *d;
2305
2306 n=s->method->ssl_get_message(s,
2307 SSL3_ST_CR_SESSION_TICKET_A,
2308 SSL3_ST_CR_SESSION_TICKET_B,
2309 -1,
2310 16384,
2311 &ok);
2312
2313 if (!ok)
2314 return((int)n);
2315
2316 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
2317 {
2318 s->s3->tmp.reuse_message=1;
2319 return(1);
2320 }
2321 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
2322 {
2323 al=SSL_AD_UNEXPECTED_MESSAGE;
2324 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2325 goto f_err;
2326 }
2327 if (n < 6)
2328 {
2329 /* need at least ticket_lifetime_hint + ticket length */
2330 al = SSL_AD_DECODE_ERROR;
2331 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2332 goto f_err;
2333 }
2334
2335 p=d=(unsigned char *)s->init_msg;
2336 n2l(p, s->session->tlsext_tick_lifetime_hint);
2337 n2s(p, ticklen);
2338 /* ticket_lifetime_hint + ticket_length + ticket */
2339 if (ticklen + 6 != n)
2340 {
2341 al = SSL_AD_DECODE_ERROR;
2342 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2343 goto f_err;
2344 }
2345 if (s->session->tlsext_tick)
2346 {
2347 OPENSSL_free(s->session->tlsext_tick);
2348 s->session->tlsext_ticklen = 0;
2349 }
2350 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2351 if (!s->session->tlsext_tick)
2352 {
2353 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2354 goto err;
2355 }
2356 memcpy(s->session->tlsext_tick, p, ticklen);
2357 s->session->tlsext_ticklen = ticklen;
2358 /* There are two ways to detect a resumed ticket session.
2359 * One is to set an appropriate session ID and then the server
2360 * must return a match in ServerHello. This allows the normal
2361 * client session ID matching to work and we know much
2362 * earlier that the ticket has been accepted.
2363 *
2364 * The other way is to set zero length session ID when the
2365 * ticket is presented and rely on the handshake to determine
2366 * session resumption.
2367 *
2368 * We choose the former approach because this fits in with
2369 * assumptions elsewhere in OpenSSL. The session ID is set
2370 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2371 * ticket.
2372 */
2373 EVP_Digest(p, ticklen,
2374 s->session->session_id, &s->session->session_id_length,
2375 #ifndef OPENSSL_NO_SHA256
2376 EVP_sha256(), NULL);
2377 #else
2378 EVP_sha1(), NULL);
2379 #endif
2380 ret=1;
2381 return(ret);
2382 f_err:
2383 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2384 err:
2385 return(-1);
2386 }
2387
2388 int ssl3_get_cert_status(SSL *s)
2389 {
2390 int ok, al;
2391 unsigned long resplen,n;
2392 const unsigned char *p;
2393
2394 n=s->method->ssl_get_message(s,
2395 SSL3_ST_CR_CERT_STATUS_A,
2396 SSL3_ST_CR_CERT_STATUS_B,
2397 SSL3_MT_CERTIFICATE_STATUS,
2398 16384,
2399 &ok);
2400
2401 if (!ok) return((int)n);
2402 if (n < 4)
2403 {
2404 /* need at least status type + length */
2405 al = SSL_AD_DECODE_ERROR;
2406 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2407 goto f_err;
2408 }
2409 p = (unsigned char *)s->init_msg;
2410 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2411 {
2412 al = SSL_AD_DECODE_ERROR;
2413 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2414 goto f_err;
2415 }
2416 n2l3(p, resplen);
2417 if (resplen + 4 != n)
2418 {
2419 al = SSL_AD_DECODE_ERROR;
2420 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2421 goto f_err;
2422 }
2423 if (s->tlsext_ocsp_resp)
2424 OPENSSL_free(s->tlsext_ocsp_resp);
2425 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2426 if (!s->tlsext_ocsp_resp)
2427 {
2428 al = SSL_AD_INTERNAL_ERROR;
2429 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2430 goto f_err;
2431 }
2432 s->tlsext_ocsp_resplen = resplen;
2433 if (s->ctx->tlsext_status_cb)
2434 {
2435 int ret;
2436 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2437 if (ret == 0)
2438 {
2439 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2440 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2441 goto f_err;
2442 }
2443 if (ret < 0)
2444 {
2445 al = SSL_AD_INTERNAL_ERROR;
2446 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2447 goto f_err;
2448 }
2449 }
2450 return 1;
2451 f_err:
2452 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2453 return(-1);
2454 }
2455 #endif
2456
2457 int ssl3_get_server_done(SSL *s)
2458 {
2459 int ok,ret=0;
2460 long n;
2461
2462 n=s->method->ssl_get_message(s,
2463 SSL3_ST_CR_SRVR_DONE_A,
2464 SSL3_ST_CR_SRVR_DONE_B,
2465 SSL3_MT_SERVER_DONE,
2466 30, /* should be very small, like 0 :-) */
2467 &ok);
2468
2469 if (!ok) return((int)n);
2470 if (n > 0)
2471 {
2472 /* should contain no data */
2473 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2474 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2475 return -1;
2476 }
2477 ret=1;
2478 return(ret);
2479 }
2480
2481
2482 int ssl3_send_client_key_exchange(SSL *s)
2483 {
2484 unsigned char *p;
2485 int n;
2486 unsigned long alg_k;
2487 #ifndef OPENSSL_NO_RSA
2488 unsigned char *q;
2489 EVP_PKEY *pkey=NULL;
2490 #endif
2491 #ifndef OPENSSL_NO_KRB5
2492 KSSL_ERR kssl_err;
2493 #endif /* OPENSSL_NO_KRB5 */
2494 #ifndef OPENSSL_NO_ECDH
2495 EC_KEY *clnt_ecdh = NULL;
2496 const EC_POINT *srvr_ecpoint = NULL;
2497 EVP_PKEY *srvr_pub_pkey = NULL;
2498 unsigned char *encodedPoint = NULL;
2499 int encoded_pt_len = 0;
2500 BN_CTX * bn_ctx = NULL;
2501 #endif
2502
2503 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2504 {
2505 p = ssl_handshake_start(s);
2506
2507 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2508
2509 /* Fool emacs indentation */
2510 if (0) {}
2511 #ifndef OPENSSL_NO_RSA
2512 else if (alg_k & SSL_kRSA)
2513 {
2514 RSA *rsa;
2515 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2516
2517 if (s->session->sess_cert == NULL)
2518 {
2519 /* We should always have a server certificate with SSL_kRSA. */
2520 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2521 goto err;
2522 }
2523
2524 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2525 rsa=s->session->sess_cert->peer_rsa_tmp;
2526 else
2527 {
2528 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2529 if ((pkey == NULL) ||
2530 (pkey->type != EVP_PKEY_RSA) ||
2531 (pkey->pkey.rsa == NULL))
2532 {
2533 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2534 goto err;
2535 }
2536 rsa=pkey->pkey.rsa;
2537 EVP_PKEY_free(pkey);
2538 }
2539
2540 tmp_buf[0]=s->client_version>>8;
2541 tmp_buf[1]=s->client_version&0xff;
2542 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2543 goto err;
2544
2545 s->session->master_key_length=sizeof tmp_buf;
2546
2547 q=p;
2548 /* Fix buf for TLS and beyond */
2549 if (s->version > SSL3_VERSION)
2550 p+=2;
2551 n=RSA_public_encrypt(sizeof tmp_buf,
2552 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2553 #ifdef PKCS1_CHECK
2554 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2555 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2556 #endif
2557 if (n <= 0)
2558 {
2559 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2560 goto err;
2561 }
2562
2563 /* Fix buf for TLS and beyond */
2564 if (s->version > SSL3_VERSION)
2565 {
2566 s2n(n,q);
2567 n+=2;
2568 }
2569
2570 s->session->master_key_length=
2571 s->method->ssl3_enc->generate_master_secret(s,
2572 s->session->master_key,
2573 tmp_buf,sizeof tmp_buf);
2574 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2575 }
2576 #endif
2577 #ifndef OPENSSL_NO_KRB5
2578 else if (alg_k & SSL_kKRB5)
2579 {
2580 krb5_error_code krb5rc;
2581 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2582 /* krb5_data krb5_ap_req; */
2583 krb5_data *enc_ticket;
2584 krb5_data authenticator, *authp = NULL;
2585 EVP_CIPHER_CTX ciph_ctx;
2586 const EVP_CIPHER *enc = NULL;
2587 unsigned char iv[EVP_MAX_IV_LENGTH];
2588 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2589 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2590 + EVP_MAX_IV_LENGTH];
2591 int padl, outl = sizeof(epms);
2592
2593 EVP_CIPHER_CTX_init(&ciph_ctx);
2594
2595 #ifdef KSSL_DEBUG
2596 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2597 alg_k, SSL_kKRB5);
2598 #endif /* KSSL_DEBUG */
2599
2600 authp = NULL;
2601 #ifdef KRB5SENDAUTH
2602 if (KRB5SENDAUTH) authp = &authenticator;
2603 #endif /* KRB5SENDAUTH */
2604
2605 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2606 &kssl_err);
2607 enc = kssl_map_enc(kssl_ctx->enctype);
2608 if (enc == NULL)
2609 goto err;
2610 #ifdef KSSL_DEBUG
2611 {
2612 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2613 if (krb5rc && kssl_err.text)
2614 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2615 }
2616 #endif /* KSSL_DEBUG */
2617
2618 if (krb5rc)
2619 {
2620 ssl3_send_alert(s,SSL3_AL_FATAL,
2621 SSL_AD_HANDSHAKE_FAILURE);
2622 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2623 kssl_err.reason);
2624 goto err;
2625 }
2626
2627 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2628 ** in place of RFC 2712 KerberosWrapper, as in:
2629 **
2630 ** Send ticket (copy to *p, set n = length)
2631 ** n = krb5_ap_req.length;
2632 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2633 ** if (krb5_ap_req.data)
2634 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2635 **
2636 ** Now using real RFC 2712 KerberosWrapper
2637 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2638 ** Note: 2712 "opaque" types are here replaced
2639 ** with a 2-byte length followed by the value.
2640 ** Example:
2641 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2642 ** Where "xx xx" = length bytes. Shown here with
2643 ** optional authenticator omitted.
2644 */
2645
2646 /* KerberosWrapper.Ticket */
2647 s2n(enc_ticket->length,p);
2648 memcpy(p, enc_ticket->data, enc_ticket->length);
2649 p+= enc_ticket->length;
2650 n = enc_ticket->length + 2;
2651
2652 /* KerberosWrapper.Authenticator */
2653 if (authp && authp->length)
2654 {
2655 s2n(authp->length,p);
2656 memcpy(p, authp->data, authp->length);
2657 p+= authp->length;
2658 n+= authp->length + 2;
2659
2660 free(authp->data);
2661 authp->data = NULL;
2662 authp->length = 0;
2663 }
2664 else
2665 {
2666 s2n(0,p);/* null authenticator length */
2667 n+=2;
2668 }
2669
2670 tmp_buf[0]=s->client_version>>8;
2671 tmp_buf[1]=s->client_version&0xff;
2672 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2673 goto err;
2674
2675 /* 20010420 VRS. Tried it this way; failed.
2676 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2677 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2678 ** kssl_ctx->length);
2679 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2680 */
2681
2682 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2683 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2684 kssl_ctx->key,iv);
2685 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2686 sizeof tmp_buf);
2687 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2688 outl += padl;
2689 if (outl > (int)sizeof epms)
2690 {
2691 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2692 goto err;
2693 }
2694 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2695
2696 /* KerberosWrapper.EncryptedPreMasterSecret */
2697 s2n(outl,p);
2698 memcpy(p, epms, outl);
2699 p+=outl;
2700 n+=outl + 2;
2701
2702 s->session->master_key_length=
2703 s->method->ssl3_enc->generate_master_secret(s,
2704 s->session->master_key,
2705 tmp_buf, sizeof tmp_buf);
2706
2707 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2708 OPENSSL_cleanse(epms, outl);
2709 }
2710 #endif
2711 #ifndef OPENSSL_NO_DH
2712 else if (alg_k & (SSL_kDHE|SSL_kDHr|SSL_kDHd))
2713 {
2714 DH *dh_srvr,*dh_clnt;
2715 SESS_CERT *scert = s->session->sess_cert;
2716
2717 if (scert == NULL)
2718 {
2719 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2720 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2721 goto err;
2722 }
2723
2724 if (scert->peer_dh_tmp != NULL)
2725 dh_srvr=scert->peer_dh_tmp;
2726 else
2727 {
2728 /* we get them from the cert */
2729 int idx = scert->peer_cert_type;
2730 EVP_PKEY *spkey = NULL;
2731 dh_srvr = NULL;
2732 if (idx >= 0)
2733 spkey = X509_get_pubkey(
2734 scert->peer_pkeys[idx].x509);
2735 if (spkey)
2736 {
2737 dh_srvr = EVP_PKEY_get1_DH(spkey);
2738 EVP_PKEY_free(spkey);
2739 }
2740 if (dh_srvr == NULL)
2741 {
2742 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2743 ERR_R_INTERNAL_ERROR);
2744 goto err;
2745 }
2746 }
2747 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2748 {
2749 /* Use client certificate key */
2750 EVP_PKEY *clkey = s->cert->key->privatekey;
2751 dh_clnt = NULL;
2752 if (clkey)
2753 dh_clnt = EVP_PKEY_get1_DH(clkey);
2754 if (dh_clnt == NULL)
2755 {
2756 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2757 ERR_R_INTERNAL_ERROR);
2758 goto err;
2759 }
2760 }
2761 else
2762 {
2763 /* generate a new random key */
2764 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2765 {
2766 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2767 goto err;
2768 }
2769 if (!DH_generate_key(dh_clnt))
2770 {
2771 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2772 DH_free(dh_clnt);
2773 goto err;
2774 }
2775 }
2776
2777 /* use the 'p' output buffer for the DH key, but
2778 * make sure to clear it out afterwards */
2779
2780 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2781 if (scert->peer_dh_tmp == NULL)
2782 DH_free(dh_srvr);
2783
2784 if (n <= 0)
2785 {
2786 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2787 DH_free(dh_clnt);
2788 goto err;
2789 }
2790
2791 /* generate master key from the result */
2792 s->session->master_key_length=
2793 s->method->ssl3_enc->generate_master_secret(s,
2794 s->session->master_key,p,n);
2795 /* clean up */
2796 memset(p,0,n);
2797
2798 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2799 n = 0;
2800 else
2801 {
2802 /* send off the data */
2803 n=BN_num_bytes(dh_clnt->pub_key);
2804 s2n(n,p);
2805 BN_bn2bin(dh_clnt->pub_key,p);
2806 n+=2;
2807 }
2808
2809 DH_free(dh_clnt);
2810
2811 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2812 }
2813 #endif
2814
2815 #ifndef OPENSSL_NO_ECDH
2816 else if (alg_k & (SSL_kECDHE|SSL_kECDHr|SSL_kECDHe))
2817 {
2818 const EC_GROUP *srvr_group = NULL;
2819 EC_KEY *tkey;
2820 int ecdh_clnt_cert = 0;
2821 int field_size = 0;
2822
2823 if (s->session->sess_cert == NULL)
2824 {
2825 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2826 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2827 goto err;
2828 }
2829
2830 /* Did we send out the client's
2831 * ECDH share for use in premaster
2832 * computation as part of client certificate?
2833 * If so, set ecdh_clnt_cert to 1.
2834 */
2835 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2836 {
2837 /* XXX: For now, we do not support client
2838 * authentication using ECDH certificates.
2839 * To add such support, one needs to add
2840 * code that checks for appropriate
2841 * conditions and sets ecdh_clnt_cert to 1.
2842 * For example, the cert have an ECC
2843 * key on the same curve as the server's
2844 * and the key should be authorized for
2845 * key agreement.
2846 *
2847 * One also needs to add code in ssl3_connect
2848 * to skip sending the certificate verify
2849 * message.
2850 *
2851 * if ((s->cert->key->privatekey != NULL) &&
2852 * (s->cert->key->privatekey->type ==
2853 * EVP_PKEY_EC) && ...)
2854 * ecdh_clnt_cert = 1;
2855 */
2856 }
2857
2858 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2859 {
2860 tkey = s->session->sess_cert->peer_ecdh_tmp;
2861 }
2862 else
2863 {
2864 /* Get the Server Public Key from Cert */
2865 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2866 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2867 if ((srvr_pub_pkey == NULL) ||
2868 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2869 (srvr_pub_pkey->pkey.ec == NULL))
2870 {
2871 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2872 ERR_R_INTERNAL_ERROR);
2873 goto err;
2874 }
2875
2876 tkey = srvr_pub_pkey->pkey.ec;
2877 }
2878
2879 srvr_group = EC_KEY_get0_group(tkey);
2880 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2881
2882 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2883 {
2884 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2885 ERR_R_INTERNAL_ERROR);
2886 goto err;
2887 }
2888
2889 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2890 {
2891 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2892 goto err;
2893 }
2894
2895 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2896 {
2897 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2898 goto err;
2899 }
2900 if (ecdh_clnt_cert)
2901 {
2902 /* Reuse key info from our certificate
2903 * We only need our private key to perform
2904 * the ECDH computation.
2905 */
2906 const BIGNUM *priv_key;
2907 tkey = s->cert->key->privatekey->pkey.ec;
2908 priv_key = EC_KEY_get0_private_key(tkey);
2909 if (priv_key == NULL)
2910 {
2911 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2912 goto err;
2913 }
2914 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2915 {
2916 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2917 goto err;
2918 }
2919 }
2920 else
2921 {
2922 /* Generate a new ECDH key pair */
2923 if (!(EC_KEY_generate_key(clnt_ecdh)))
2924 {
2925 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2926 goto err;
2927 }
2928 }
2929
2930 /* use the 'p' output buffer for the ECDH key, but
2931 * make sure to clear it out afterwards
2932 */
2933
2934 field_size = EC_GROUP_get_degree(srvr_group);
2935 if (field_size <= 0)
2936 {
2937 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2938 ERR_R_ECDH_LIB);
2939 goto err;
2940 }
2941 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2942 if (n <= 0)
2943 {
2944 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2945 ERR_R_ECDH_LIB);
2946 goto err;
2947 }
2948
2949 /* generate master key from the result */
2950 s->session->master_key_length = s->method->ssl3_enc \
2951 -> generate_master_secret(s,
2952 s->session->master_key,
2953 p, n);
2954
2955 memset(p, 0, n); /* clean up */
2956
2957 if (ecdh_clnt_cert)
2958 {
2959 /* Send empty client key exch message */
2960 n = 0;
2961 }
2962 else
2963 {
2964 /* First check the size of encoding and
2965 * allocate memory accordingly.
2966 */
2967 encoded_pt_len =
2968 EC_POINT_point2oct(srvr_group,
2969 EC_KEY_get0_public_key(clnt_ecdh),
2970 POINT_CONVERSION_UNCOMPRESSED,
2971 NULL, 0, NULL);
2972
2973 encodedPoint = (unsigned char *)
2974 OPENSSL_malloc(encoded_pt_len *
2975 sizeof(unsigned char));
2976 bn_ctx = BN_CTX_new();
2977 if ((encodedPoint == NULL) ||
2978 (bn_ctx == NULL))
2979 {
2980 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2981 goto err;
2982 }
2983
2984 /* Encode the public key */
2985 n = EC_POINT_point2oct(srvr_group,
2986 EC_KEY_get0_public_key(clnt_ecdh),
2987 POINT_CONVERSION_UNCOMPRESSED,
2988 encodedPoint, encoded_pt_len, bn_ctx);
2989
2990 *p = n; /* length of encoded point */
2991 /* Encoded point will be copied here */
2992 p += 1;
2993 /* copy the point */
2994 memcpy((unsigned char *)p, encodedPoint, n);
2995 /* increment n to account for length field */
2996 n += 1;
2997 }
2998
2999 /* Free allocated memory */
3000 BN_CTX_free(bn_ctx);
3001 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
3002 if (clnt_ecdh != NULL)
3003 EC_KEY_free(clnt_ecdh);
3004 EVP_PKEY_free(srvr_pub_pkey);
3005 }
3006 #endif /* !OPENSSL_NO_ECDH */
3007 else if (alg_k & SSL_kGOST)
3008 {
3009 /* GOST key exchange message creation */
3010 EVP_PKEY_CTX *pkey_ctx;
3011 X509 *peer_cert;
3012 size_t msglen;
3013 unsigned int md_len;
3014 int keytype;
3015 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
3016 EVP_MD_CTX *ukm_hash;
3017 EVP_PKEY *pub_key;
3018
3019 /* Get server sertificate PKEY and create ctx from it */
3020 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
3021 if (!peer_cert)
3022 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
3023 if (!peer_cert) {
3024 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
3025 goto err;
3026 }
3027
3028 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
3029 /* If we have send a certificate, and certificate key
3030
3031 * parameters match those of server certificate, use
3032 * certificate key for key exchange
3033 */
3034
3035 /* Otherwise, generate ephemeral key pair */
3036
3037 EVP_PKEY_encrypt_init(pkey_ctx);
3038 /* Generate session key */
3039 RAND_bytes(premaster_secret,32);
3040 /* If we have client certificate, use its secret as peer key */
3041 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
3042 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
3043 /* If there was an error - just ignore it. Ephemeral key
3044 * would be used
3045 */
3046 ERR_clear_error();
3047 }
3048 }
3049 /* Compute shared IV and store it in algorithm-specific
3050 * context data */
3051 ukm_hash = EVP_MD_CTX_create();
3052 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
3053 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
3054 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
3055 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
3056 EVP_MD_CTX_destroy(ukm_hash);
3057 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
3058 8,shared_ukm)<0) {
3059 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3060 SSL_R_LIBRARY_BUG);
3061 goto err;
3062 }
3063 /* Make GOST keytransport blob message */
3064 /*Encapsulate it into sequence */
3065 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
3066 msglen=255;
3067 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
3068 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3069 SSL_R_LIBRARY_BUG);
3070 goto err;
3071 }
3072 if (msglen >= 0x80)
3073 {
3074 *(p++)=0x81;
3075 *(p++)= msglen & 0xff;
3076 n=msglen+3;
3077 }
3078 else
3079 {
3080 *(p++)= msglen & 0xff;
3081 n=msglen+2;
3082 }
3083 memcpy(p, tmp, msglen);
3084 /* Check if pubkey from client certificate was used */
3085 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
3086 {
3087 /* Set flag "skip certificate verify" */
3088 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3089 }
3090 EVP_PKEY_CTX_free(pkey_ctx);
3091 s->session->master_key_length=
3092 s->method->ssl3_enc->generate_master_secret(s,
3093 s->session->master_key,premaster_secret,32);
3094 EVP_PKEY_free(pub_key);
3095
3096 }
3097 #ifndef OPENSSL_NO_SRP
3098 else if (alg_k & SSL_kSRP)
3099 {
3100 if (s->srp_ctx.A != NULL)
3101 {
3102 /* send off the data */
3103 n=BN_num_bytes(s->srp_ctx.A);
3104 s2n(n,p);
3105 BN_bn2bin(s->srp_ctx.A,p);
3106 n+=2;
3107 }
3108 else
3109 {
3110 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
3111 goto err;
3112 }
3113 if (s->session->srp_username != NULL)
3114 OPENSSL_free(s->session->srp_username);
3115 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
3116 if (s->session->srp_username == NULL)
3117 {
3118 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3119 ERR_R_MALLOC_FAILURE);
3120 goto err;
3121 }
3122
3123 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
3124 {
3125 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
3126 goto err;
3127 }
3128 }
3129 #endif
3130 #ifndef OPENSSL_NO_PSK
3131 else if (alg_k & SSL_kPSK)
3132 {
3133 /* The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes
3134 * to return a \0-terminated identity. The last byte
3135 * is for us for simulating strnlen. */
3136 char identity[PSK_MAX_IDENTITY_LEN + 2];
3137 size_t identity_len;
3138 unsigned char *t = NULL;
3139 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
3140 unsigned int pre_ms_len = 0, psk_len = 0;
3141 int psk_err = 1;
3142
3143 n = 0;
3144 if (s->psk_client_callback == NULL)
3145 {
3146 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3147 SSL_R_PSK_NO_CLIENT_CB);
3148 goto err;
3149 }
3150
3151 memset(identity, 0, sizeof(identity));
3152 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
3153 identity, sizeof(identity) - 1,
3154 psk_or_pre_ms, sizeof(psk_or_pre_ms));
3155 if (psk_len > PSK_MAX_PSK_LEN)
3156 {
3157 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3158 ERR_R_INTERNAL_ERROR);
3159 goto psk_err;
3160 }
3161 else if (psk_len == 0)
3162 {
3163 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3164 SSL_R_PSK_IDENTITY_NOT_FOUND);
3165 goto psk_err;
3166 }
3167 identity[PSK_MAX_IDENTITY_LEN + 1] = '\0';
3168 identity_len = strlen(identity);
3169 if (identity_len > PSK_MAX_IDENTITY_LEN)
3170 {
3171 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3172 ERR_R_INTERNAL_ERROR);
3173 goto psk_err;
3174 }
3175 /* create PSK pre_master_secret */
3176 pre_ms_len = 2+psk_len+2+psk_len;
3177 t = psk_or_pre_ms;
3178 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
3179 s2n(psk_len, t);
3180 memset(t, 0, psk_len);
3181 t+=psk_len;
3182 s2n(psk_len, t);
3183
3184 if (s->session->psk_identity_hint != NULL)
3185 OPENSSL_free(s->session->psk_identity_hint);
3186 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
3187 if (s->ctx->psk_identity_hint != NULL &&
3188 s->session->psk_identity_hint == NULL)
3189 {
3190 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3191 ERR_R_MALLOC_FAILURE);
3192 goto psk_err;
3193 }
3194
3195 if (s->session->psk_identity != NULL)
3196 OPENSSL_free(s->session->psk_identity);
3197 s->session->psk_identity = BUF_strdup(identity);
3198 if (s->session->psk_identity == NULL)
3199 {
3200 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3201 ERR_R_MALLOC_FAILURE);
3202 goto psk_err;
3203 }
3204
3205 s->session->master_key_length =
3206 s->method->ssl3_enc->generate_master_secret(s,
3207 s->session->master_key,
3208 psk_or_pre_ms, pre_ms_len);
3209 s2n(identity_len, p);
3210 memcpy(p, identity, identity_len);
3211 n = 2 + identity_len;
3212 psk_err = 0;
3213 psk_err:
3214 OPENSSL_cleanse(identity, sizeof(identity));
3215 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
3216 if (psk_err != 0)
3217 {
3218 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
3219 goto err;
3220 }
3221 }
3222 #endif
3223 else
3224 {
3225 ssl3_send_alert(s, SSL3_AL_FATAL,
3226 SSL_AD_HANDSHAKE_FAILURE);
3227 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3228 ERR_R_INTERNAL_ERROR);
3229 goto err;
3230 }
3231
3232 ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n);
3233 s->state=SSL3_ST_CW_KEY_EXCH_B;
3234 }
3235
3236 /* SSL3_ST_CW_KEY_EXCH_B */
3237 return ssl_do_write(s);
3238 err:
3239 #ifndef OPENSSL_NO_ECDH
3240 BN_CTX_free(bn_ctx);
3241 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
3242 if (clnt_ecdh != NULL)
3243 EC_KEY_free(clnt_ecdh);
3244 EVP_PKEY_free(srvr_pub_pkey);
3245 #endif
3246 return(-1);
3247 }
3248
3249 int ssl3_send_client_verify(SSL *s)
3250 {
3251 unsigned char *p;
3252 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
3253 EVP_PKEY *pkey;
3254 EVP_PKEY_CTX *pctx=NULL;
3255 EVP_MD_CTX mctx;
3256 unsigned u=0;
3257 unsigned long n;
3258 int j;
3259
3260 EVP_MD_CTX_init(&mctx);
3261
3262 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
3263 {
3264 p= ssl_handshake_start(s);
3265 pkey=s->cert->key->privatekey;
3266 /* Create context from key and test if sha1 is allowed as digest */
3267 pctx = EVP_PKEY_CTX_new(pkey,NULL);
3268 EVP_PKEY_sign_init(pctx);
3269 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
3270 {
3271 if (!SSL_USE_SIGALGS(s))
3272 s->method->ssl3_enc->cert_verify_mac(s,
3273 NID_sha1,
3274 &(data[MD5_DIGEST_LENGTH]));
3275 }
3276 else
3277 {
3278 ERR_clear_error();
3279 }
3280 /* For TLS v1.2 send signature algorithm and signature
3281 * using agreed digest and cached handshake records.
3282 */
3283 if (SSL_USE_SIGALGS(s))
3284 {
3285 long hdatalen = 0;
3286 void *hdata;
3287 const EVP_MD *md = s->cert->key->digest;
3288 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
3289 &hdata);
3290 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
3291 {
3292 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3293 ERR_R_INTERNAL_ERROR);
3294 goto err;
3295 }
3296 p += 2;
3297 #ifdef SSL_DEBUG
3298 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
3299 EVP_MD_name(md));
3300 #endif
3301 if (!EVP_SignInit_ex(&mctx, md, NULL)
3302 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3303 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
3304 {
3305 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3306 ERR_R_EVP_LIB);
3307 goto err;
3308 }
3309 s2n(u,p);
3310 n = u + 4;
3311 if (!ssl3_digest_cached_records(s))
3312 goto err;
3313 }
3314 else
3315 #ifndef OPENSSL_NO_RSA
3316 if (pkey->type == EVP_PKEY_RSA)
3317 {
3318 s->method->ssl3_enc->cert_verify_mac(s,
3319 NID_md5,
3320 &(data[0]));
3321 if (RSA_sign(NID_md5_sha1, data,
3322 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3323 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3324 {
3325 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3326 goto err;
3327 }
3328 s2n(u,p);
3329 n=u+2;
3330 }
3331 else
3332 #endif
3333 #ifndef OPENSSL_NO_DSA
3334 if (pkey->type == EVP_PKEY_DSA)
3335 {
3336 if (!DSA_sign(pkey->save_type,
3337 &(data[MD5_DIGEST_LENGTH]),
3338 SHA_DIGEST_LENGTH,&(p[2]),
3339 (unsigned int *)&j,pkey->pkey.dsa))
3340 {
3341 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3342 goto err;
3343 }
3344 s2n(j,p);
3345 n=j+2;
3346 }
3347 else
3348 #endif
3349 #ifndef OPENSSL_NO_ECDSA
3350 if (pkey->type == EVP_PKEY_EC)
3351 {
3352 if (!ECDSA_sign(pkey->save_type,
3353 &(data[MD5_DIGEST_LENGTH]),
3354 SHA_DIGEST_LENGTH,&(p[2]),
3355 (unsigned int *)&j,pkey->pkey.ec))
3356 {
3357 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3358 ERR_R_ECDSA_LIB);
3359 goto err;
3360 }
3361 s2n(j,p);
3362 n=j+2;
3363 }
3364 else
3365 #endif
3366 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3367 {
3368 unsigned char signbuf[64];
3369 int i;
3370 size_t sigsize=64;
3371 s->method->ssl3_enc->cert_verify_mac(s,
3372 NID_id_GostR3411_94,
3373 data);
3374 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3375 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3376 ERR_R_INTERNAL_ERROR);
3377 goto err;
3378 }
3379 for (i=63,j=0; i>=0; j++, i--) {
3380 p[2+j]=signbuf[i];
3381 }
3382 s2n(j,p);
3383 n=j+2;
3384 }
3385 else
3386 {
3387 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3388 goto err;
3389 }
3390 ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n);
3391 s->state=SSL3_ST_CW_CERT_VRFY_B;
3392 }
3393 EVP_MD_CTX_cleanup(&mctx);
3394 EVP_PKEY_CTX_free(pctx);
3395 return ssl_do_write(s);
3396 err:
3397 EVP_MD_CTX_cleanup(&mctx);
3398 EVP_PKEY_CTX_free(pctx);
3399 return(-1);
3400 }
3401
3402 /* Check a certificate can be used for client authentication. Currently
3403 * check cert exists, if we have a suitable digest for TLS 1.2 if
3404 * static DH client certificates can be used and optionally checks
3405 * suitability for Suite B.
3406 */
3407 static int ssl3_check_client_certificate(SSL *s)
3408 {
3409 unsigned long alg_k;
3410 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
3411 return 0;
3412 /* If no suitable signature algorithm can't use certificate */
3413 if (SSL_USE_SIGALGS(s) && !s->cert->key->digest)
3414 return 0;
3415 /* If strict mode check suitability of chain before using it.
3416 * This also adjusts suite B digest if necessary.
3417 */
3418 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
3419 !tls1_check_chain(s, NULL, NULL, NULL, -2))
3420 return 0;
3421 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3422 /* See if we can use client certificate for fixed DH */
3423 if (alg_k & (SSL_kDHr|SSL_kDHd))
3424 {
3425 SESS_CERT *scert = s->session->sess_cert;
3426 int i = scert->peer_cert_type;
3427 EVP_PKEY *clkey = NULL, *spkey = NULL;
3428 clkey = s->cert->key->privatekey;
3429 /* If client key not DH assume it can be used */
3430 if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
3431 return 1;
3432 if (i >= 0)
3433 spkey = X509_get_pubkey(scert->peer_pkeys[i].x509);
3434 if (spkey)
3435 {
3436 /* Compare server and client parameters */
3437 i = EVP_PKEY_cmp_parameters(clkey, spkey);
3438 EVP_PKEY_free(spkey);
3439 if (i != 1)
3440 return 0;
3441 }
3442 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3443 }
3444 return 1;
3445 }
3446
3447 int ssl3_send_client_certificate(SSL *s)
3448 {
3449 X509 *x509=NULL;
3450 EVP_PKEY *pkey=NULL;
3451 int i;
3452
3453 if (s->state == SSL3_ST_CW_CERT_A)
3454 {
3455 /* Let cert callback update client certificates if required */
3456 if (s->cert->cert_cb)
3457 {
3458 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
3459 if (i < 0)
3460 {
3461 s->rwstate=SSL_X509_LOOKUP;
3462 return -1;
3463 }
3464 if (i == 0)
3465 {
3466 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3467 return 0;
3468 }
3469 s->rwstate=SSL_NOTHING;
3470 }
3471 if (ssl3_check_client_certificate(s))
3472 s->state=SSL3_ST_CW_CERT_C;
3473 else
3474 s->state=SSL3_ST_CW_CERT_B;
3475 }
3476
3477 /* We need to get a client cert */
3478 if (s->state == SSL3_ST_CW_CERT_B)
3479 {
3480 /* If we get an error, we need to
3481 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3482 * We then get retied later */
3483 i=0;
3484 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3485 if (i < 0)
3486 {
3487 s->rwstate=SSL_X509_LOOKUP;
3488 return(-1);
3489 }
3490 s->rwstate=SSL_NOTHING;
3491 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3492 {
3493 s->state=SSL3_ST_CW_CERT_B;
3494 if ( !SSL_use_certificate(s,x509) ||
3495 !SSL_use_PrivateKey(s,pkey))
3496 i=0;
3497 }
3498 else if (i == 1)
3499 {
3500 i=0;
3501 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3502 }
3503
3504 if (x509 != NULL) X509_free(x509);
3505 if (pkey != NULL) EVP_PKEY_free(pkey);
3506 if (i && !ssl3_check_client_certificate(s))
3507 i = 0;
3508 if (i == 0)
3509 {
3510 if (s->version == SSL3_VERSION)
3511 {
3512 s->s3->tmp.cert_req=0;
3513 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3514 return(1);
3515 }
3516 else
3517 {
3518 s->s3->tmp.cert_req=2;
3519 }
3520 }
3521
3522 /* Ok, we have a cert */
3523 s->state=SSL3_ST_CW_CERT_C;
3524 }
3525
3526 if (s->state == SSL3_ST_CW_CERT_C)
3527 {
3528 s->state=SSL3_ST_CW_CERT_D;
3529 if (!ssl3_output_cert_chain(s,
3530 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key))
3531 {
3532 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
3533 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3534 return 0;
3535 }
3536 }
3537 /* SSL3_ST_CW_CERT_D */
3538 return ssl_do_write(s);
3539 }
3540
3541 #define has_bits(i,m) (((i)&(m)) == (m))
3542
3543 int ssl3_check_cert_and_algorithm(SSL *s)
3544 {
3545 int i,idx;
3546 long alg_k,alg_a;
3547 EVP_PKEY *pkey=NULL;
3548 SESS_CERT *sc;
3549 #ifndef OPENSSL_NO_RSA
3550 RSA *rsa;
3551 #endif
3552 #ifndef OPENSSL_NO_DH
3553 DH *dh;
3554 #endif
3555
3556 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3557 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3558
3559 /* we don't have a certificate */
3560 if ((alg_a & (SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3561 return(1);
3562
3563 sc=s->session->sess_cert;
3564 if (sc == NULL)
3565 {
3566 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3567 goto err;
3568 }
3569
3570 #ifndef OPENSSL_NO_RSA
3571 rsa=s->session->sess_cert->peer_rsa_tmp;
3572 #endif
3573 #ifndef OPENSSL_NO_DH
3574 dh=s->session->sess_cert->peer_dh_tmp;
3575 #endif
3576
3577 /* This is the passed certificate */
3578
3579 idx=sc->peer_cert_type;
3580 #ifndef OPENSSL_NO_ECDH
3581 if (idx == SSL_PKEY_ECC)
3582 {
3583 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3584 s) == 0)
3585 { /* check failed */
3586 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3587 goto f_err;
3588 }
3589 else
3590 {
3591 return 1;
3592 }
3593 }
3594 else if (alg_a & SSL_aECDSA)
3595 {
3596 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDSA_SIGNING_CERT);
3597 goto f_err;
3598 }
3599 else if (alg_k & (SSL_kECDHr|SSL_kECDHe))
3600 {
3601 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDH_CERT);
3602 goto f_err;
3603 }
3604 #endif
3605 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3606 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3607 EVP_PKEY_free(pkey);
3608
3609
3610 /* Check that we have a certificate if we require one */
3611 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3612 {
3613 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3614 goto f_err;
3615 }
3616 #ifndef OPENSSL_NO_DSA
3617 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3618 {
3619 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3620 goto f_err;
3621 }
3622 #endif
3623 #ifndef OPENSSL_NO_RSA
3624 if ((alg_k & SSL_kRSA) &&
3625 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3626 {
3627 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3628 goto f_err;
3629 }
3630 #endif
3631 #ifndef OPENSSL_NO_DH
3632 if ((alg_k & SSL_kDHE) &&
3633 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3634 {
3635 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3636 goto f_err;
3637 }
3638 else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) &&
3639 !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3640 {
3641 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3642 goto f_err;
3643 }
3644 #ifndef OPENSSL_NO_DSA
3645 else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) &&
3646 !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3647 {
3648 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3649 goto f_err;
3650 }
3651 #endif
3652 #endif
3653
3654 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3655 {
3656 #ifndef OPENSSL_NO_RSA
3657 if (alg_k & SSL_kRSA)
3658 {
3659 if (rsa == NULL
3660 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3661 {
3662 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3663 goto f_err;
3664 }
3665 }
3666 else
3667 #endif
3668 #ifndef OPENSSL_NO_DH
3669 if (alg_k & (SSL_kDHE|SSL_kDHr|SSL_kDHd))
3670 {
3671 if (dh == NULL
3672 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3673 {
3674 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3675 goto f_err;
3676 }
3677 }
3678 else
3679 #endif
3680 {
3681 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3682 goto f_err;
3683 }
3684 }
3685 return(1);
3686 f_err:
3687 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3688 err:
3689 return(0);
3690 }
3691
3692 /* Check to see if handshake is full or resumed. Usually this is just a
3693 * case of checking to see if a cache hit has occurred. In the case of
3694 * session tickets we have to check the next message to be sure.
3695 */
3696
3697 #ifndef OPENSSL_NO_TLSEXT
3698 # ifndef OPENSSL_NO_NEXTPROTONEG
3699 int ssl3_send_next_proto(SSL *s)
3700 {
3701 unsigned int len, padding_len;
3702 unsigned char *d;
3703
3704 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3705 {
3706 len = s->next_proto_negotiated_len;
3707 padding_len = 32 - ((len + 2) % 32);
3708 d = (unsigned char *)s->init_buf->data;
3709 d[4] = len;
3710 memcpy(d + 5, s->next_proto_negotiated, len);
3711 d[5 + len] = padding_len;
3712 memset(d + 6 + len, 0, padding_len);
3713 *(d++)=SSL3_MT_NEXT_PROTO;
3714 l2n3(2 + len + padding_len, d);
3715 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3716 s->init_num = 4 + 2 + len + padding_len;
3717 s->init_off = 0;
3718 }
3719
3720 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3721 }
3722 # endif
3723
3724 int ssl3_check_finished(SSL *s)
3725 {
3726 int ok;
3727 long n;
3728
3729 /* If we have no ticket it cannot be a resumed session. */
3730 if (!s->session->tlsext_tick)
3731 return 1;
3732 /* this function is called when we really expect a Certificate
3733 * message, so permit appropriate message length */
3734 n=s->method->ssl_get_message(s,
3735 SSL3_ST_CR_CERT_A,
3736 SSL3_ST_CR_CERT_B,
3737 -1,
3738 s->max_cert_list,
3739 &ok);
3740 if (!ok) return((int)n);
3741 s->s3->tmp.reuse_message = 1;
3742
3743 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3744 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3745 return 2;
3746
3747 return 1;
3748 }
3749 #endif
3750
3751 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3752 {
3753 int i = 0;
3754 #ifndef OPENSSL_NO_ENGINE
3755 if (s->ctx->client_cert_engine)
3756 {
3757 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3758 SSL_get_client_CA_list(s),
3759 px509, ppkey, NULL, NULL, NULL);
3760 if (i != 0)
3761 return i;
3762 }
3763 #endif
3764 if (s->ctx->client_cert_cb)
3765 i = s->ctx->client_cert_cb(s,px509,ppkey);
3766 return i;
3767 }
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