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Fixed error introduced in commit f2be92b94dad3c6cbdf79d99a324804094cf1617
[thirdparty/openssl.git] / ssl / s3_clnt.c
1 /* ssl/s3_clnt.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58 /* ====================================================================
59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 *
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
71 * distribution.
72 *
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 *
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
82 *
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 * acknowledgment:
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
105 *
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
109 *
110 */
111 /* ====================================================================
112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113 *
114 * Portions of the attached software ("Contribution") are developed by
115 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
116 *
117 * The Contribution is licensed pursuant to the OpenSSL open source
118 * license provided above.
119 *
120 * ECC cipher suite support in OpenSSL originally written by
121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
122 *
123 */
124 /* ====================================================================
125 * Copyright 2005 Nokia. All rights reserved.
126 *
127 * The portions of the attached software ("Contribution") is developed by
128 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
129 * license.
130 *
131 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
132 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
133 * support (see RFC 4279) to OpenSSL.
134 *
135 * No patent licenses or other rights except those expressly stated in
136 * the OpenSSL open source license shall be deemed granted or received
137 * expressly, by implication, estoppel, or otherwise.
138 *
139 * No assurances are provided by Nokia that the Contribution does not
140 * infringe the patent or other intellectual property rights of any third
141 * party or that the license provides you with all the necessary rights
142 * to make use of the Contribution.
143 *
144 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
145 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
146 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
147 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
148 * OTHERWISE.
149 */
150
151 #include <stdio.h>
152 #include "ssl_locl.h"
153 #include "kssl_lcl.h"
154 #include <openssl/buffer.h>
155 #include <openssl/rand.h>
156 #include <openssl/objects.h>
157 #include <openssl/evp.h>
158 #include <openssl/md5.h>
159 #ifdef OPENSSL_FIPS
160 #include <openssl/fips.h>
161 #endif
162 #ifndef OPENSSL_NO_DH
163 #include <openssl/dh.h>
164 #endif
165 #include <openssl/bn.h>
166 #ifndef OPENSSL_NO_ENGINE
167 #include <openssl/engine.h>
168 #endif
169
170 static const SSL_METHOD *ssl3_get_client_method(int ver);
171 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
172
173 static const SSL_METHOD *ssl3_get_client_method(int ver)
174 {
175 if (ver == SSL3_VERSION)
176 return(SSLv3_client_method());
177 else
178 return(NULL);
179 }
180
181 IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
182 ssl_undefined_function,
183 ssl3_connect,
184 ssl3_get_client_method)
185
186 int ssl3_connect(SSL *s)
187 {
188 BUF_MEM *buf=NULL;
189 unsigned long Time=(unsigned long)time(NULL);
190 void (*cb)(const SSL *ssl,int type,int val)=NULL;
191 int ret= -1;
192 int new_state,state,skip=0;
193
194 RAND_add(&Time,sizeof(Time),0);
195 ERR_clear_error();
196 clear_sys_error();
197
198 if (s->info_callback != NULL)
199 cb=s->info_callback;
200 else if (s->ctx->info_callback != NULL)
201 cb=s->ctx->info_callback;
202
203 s->in_handshake++;
204 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
205
206 #ifndef OPENSSL_NO_HEARTBEATS
207 /* If we're awaiting a HeartbeatResponse, pretend we
208 * already got and don't await it anymore, because
209 * Heartbeats don't make sense during handshakes anyway.
210 */
211 if (s->tlsext_hb_pending)
212 {
213 s->tlsext_hb_pending = 0;
214 s->tlsext_hb_seq++;
215 }
216 #endif
217
218 for (;;)
219 {
220 state=s->state;
221
222 switch(s->state)
223 {
224 case SSL_ST_RENEGOTIATE:
225 s->renegotiate=1;
226 s->state=SSL_ST_CONNECT;
227 s->ctx->stats.sess_connect_renegotiate++;
228 /* break */
229 case SSL_ST_BEFORE:
230 case SSL_ST_CONNECT:
231 case SSL_ST_BEFORE|SSL_ST_CONNECT:
232 case SSL_ST_OK|SSL_ST_CONNECT:
233
234 s->server=0;
235 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
236
237 if ((s->version & 0xff00 ) != 0x0300)
238 {
239 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
240 ret = -1;
241 goto end;
242 }
243
244 if (!ssl_security(s, SSL_SECOP_VERSION, 0,
245 s->version, NULL))
246 {
247 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_VERSION_TOO_LOW);
248 return -1;
249 }
250
251 /* s->version=SSL3_VERSION; */
252 s->type=SSL_ST_CONNECT;
253
254 if (s->init_buf == NULL)
255 {
256 if ((buf=BUF_MEM_new()) == NULL)
257 {
258 ret= -1;
259 goto end;
260 }
261 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
262 {
263 ret= -1;
264 goto end;
265 }
266 s->init_buf=buf;
267 buf=NULL;
268 }
269
270 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
271
272 /* setup buffing BIO */
273 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
274
275 /* don't push the buffering BIO quite yet */
276
277 ssl3_init_finished_mac(s);
278
279 s->state=SSL3_ST_CW_CLNT_HELLO_A;
280 s->ctx->stats.sess_connect++;
281 s->init_num=0;
282 break;
283
284 case SSL3_ST_CW_CLNT_HELLO_A:
285 case SSL3_ST_CW_CLNT_HELLO_B:
286
287 s->shutdown=0;
288 ret=ssl3_client_hello(s);
289 if (ret <= 0) goto end;
290 s->state=SSL3_ST_CR_SRVR_HELLO_A;
291 s->init_num=0;
292
293 /* turn on buffering for the next lot of output */
294 if (s->bbio != s->wbio)
295 s->wbio=BIO_push(s->bbio,s->wbio);
296
297 break;
298
299 case SSL3_ST_CR_SRVR_HELLO_A:
300 case SSL3_ST_CR_SRVR_HELLO_B:
301 ret=ssl3_get_server_hello(s);
302 if (ret <= 0) goto end;
303
304 if (s->hit)
305 {
306 s->state=SSL3_ST_CR_FINISHED_A;
307 #ifndef OPENSSL_NO_TLSEXT
308 if (s->tlsext_ticket_expected)
309 {
310 /* receive renewed session ticket */
311 s->state=SSL3_ST_CR_SESSION_TICKET_A;
312 }
313 #endif
314 }
315 else
316 {
317 s->state=SSL3_ST_CR_CERT_A;
318 }
319 s->init_num=0;
320 break;
321 case SSL3_ST_CR_CERT_A:
322 case SSL3_ST_CR_CERT_B:
323 #ifndef OPENSSL_NO_TLSEXT
324 ret=ssl3_check_finished(s);
325 if (ret <= 0) goto end;
326 if (ret == 2)
327 {
328 s->hit = 1;
329 if (s->tlsext_ticket_expected)
330 s->state=SSL3_ST_CR_SESSION_TICKET_A;
331 else
332 s->state=SSL3_ST_CR_FINISHED_A;
333 s->init_num=0;
334 break;
335 }
336 #endif
337 /* Check if it is anon DH/ECDH, SRP auth */
338 /* or PSK */
339 if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL|SSL_aSRP)) &&
340 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
341 {
342 ret=ssl3_get_server_certificate(s);
343 if (ret <= 0) goto end;
344 #ifndef OPENSSL_NO_TLSEXT
345 if (s->tlsext_status_expected)
346 s->state=SSL3_ST_CR_CERT_STATUS_A;
347 else
348 s->state=SSL3_ST_CR_KEY_EXCH_A;
349 }
350 else
351 {
352 skip = 1;
353 s->state=SSL3_ST_CR_KEY_EXCH_A;
354 }
355 #else
356 }
357 else
358 skip=1;
359
360 s->state=SSL3_ST_CR_KEY_EXCH_A;
361 #endif
362 s->init_num=0;
363 break;
364
365 case SSL3_ST_CR_KEY_EXCH_A:
366 case SSL3_ST_CR_KEY_EXCH_B:
367 ret=ssl3_get_key_exchange(s);
368 if (ret <= 0) goto end;
369 s->state=SSL3_ST_CR_CERT_REQ_A;
370 s->init_num=0;
371
372 /* at this point we check that we have the
373 * required stuff from the server */
374 if (!ssl3_check_cert_and_algorithm(s))
375 {
376 ret= -1;
377 goto end;
378 }
379 break;
380
381 case SSL3_ST_CR_CERT_REQ_A:
382 case SSL3_ST_CR_CERT_REQ_B:
383 ret=ssl3_get_certificate_request(s);
384 if (ret <= 0) goto end;
385 s->state=SSL3_ST_CR_SRVR_DONE_A;
386 s->init_num=0;
387 break;
388
389 case SSL3_ST_CR_SRVR_DONE_A:
390 case SSL3_ST_CR_SRVR_DONE_B:
391 ret=ssl3_get_server_done(s);
392 if (ret <= 0) goto end;
393 #ifndef OPENSSL_NO_SRP
394 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP)
395 {
396 if ((ret = SRP_Calc_A_param(s))<=0)
397 {
398 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
399 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
400 goto end;
401 }
402 }
403 #endif
404 if (s->s3->tmp.cert_req)
405 s->state=SSL3_ST_CW_CERT_A;
406 else
407 s->state=SSL3_ST_CW_KEY_EXCH_A;
408 s->init_num=0;
409
410 break;
411
412 case SSL3_ST_CW_CERT_A:
413 case SSL3_ST_CW_CERT_B:
414 case SSL3_ST_CW_CERT_C:
415 case SSL3_ST_CW_CERT_D:
416 ret=ssl3_send_client_certificate(s);
417 if (ret <= 0) goto end;
418 s->state=SSL3_ST_CW_KEY_EXCH_A;
419 s->init_num=0;
420 break;
421
422 case SSL3_ST_CW_KEY_EXCH_A:
423 case SSL3_ST_CW_KEY_EXCH_B:
424 ret=ssl3_send_client_key_exchange(s);
425 if (ret <= 0) goto end;
426 /* EAY EAY EAY need to check for DH fix cert
427 * sent back */
428 /* For TLS, cert_req is set to 2, so a cert chain
429 * of nothing is sent, but no verify packet is sent */
430 /* XXX: For now, we do not support client
431 * authentication in ECDH cipher suites with
432 * ECDH (rather than ECDSA) certificates.
433 * We need to skip the certificate verify
434 * message when client's ECDH public key is sent
435 * inside the client certificate.
436 */
437 if (s->s3->tmp.cert_req == 1)
438 {
439 s->state=SSL3_ST_CW_CERT_VRFY_A;
440 }
441 else
442 {
443 s->state=SSL3_ST_CW_CHANGE_A;
444 s->s3->change_cipher_spec=0;
445 }
446 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
447 {
448 s->state=SSL3_ST_CW_CHANGE_A;
449 s->s3->change_cipher_spec=0;
450 }
451
452 s->init_num=0;
453 break;
454
455 case SSL3_ST_CW_CERT_VRFY_A:
456 case SSL3_ST_CW_CERT_VRFY_B:
457 ret=ssl3_send_client_verify(s);
458 if (ret <= 0) goto end;
459 s->state=SSL3_ST_CW_CHANGE_A;
460 s->init_num=0;
461 s->s3->change_cipher_spec=0;
462 break;
463
464 case SSL3_ST_CW_CHANGE_A:
465 case SSL3_ST_CW_CHANGE_B:
466 ret=ssl3_send_change_cipher_spec(s,
467 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
468 if (ret <= 0) goto end;
469
470 #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
471 s->state=SSL3_ST_CW_FINISHED_A;
472 #else
473 if (s->s3->next_proto_neg_seen)
474 s->state=SSL3_ST_CW_NEXT_PROTO_A;
475 else
476 s->state=SSL3_ST_CW_FINISHED_A;
477 #endif
478 s->init_num=0;
479
480 s->session->cipher=s->s3->tmp.new_cipher;
481 #ifdef OPENSSL_NO_COMP
482 s->session->compress_meth=0;
483 #else
484 if (s->s3->tmp.new_compression == NULL)
485 s->session->compress_meth=0;
486 else
487 s->session->compress_meth=
488 s->s3->tmp.new_compression->id;
489 #endif
490 if (!s->method->ssl3_enc->setup_key_block(s))
491 {
492 ret= -1;
493 goto end;
494 }
495
496 if (!s->method->ssl3_enc->change_cipher_state(s,
497 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
498 {
499 ret= -1;
500 goto end;
501 }
502
503 break;
504
505 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
506 case SSL3_ST_CW_NEXT_PROTO_A:
507 case SSL3_ST_CW_NEXT_PROTO_B:
508 ret=ssl3_send_next_proto(s);
509 if (ret <= 0) goto end;
510 s->state=SSL3_ST_CW_FINISHED_A;
511 break;
512 #endif
513
514 case SSL3_ST_CW_FINISHED_A:
515 case SSL3_ST_CW_FINISHED_B:
516 ret=ssl3_send_finished(s,
517 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
518 s->method->ssl3_enc->client_finished_label,
519 s->method->ssl3_enc->client_finished_label_len);
520 if (ret <= 0) goto end;
521 s->s3->flags |= SSL3_FLAGS_CCS_OK;
522 s->state=SSL3_ST_CW_FLUSH;
523
524 /* clear flags */
525 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
526 if (s->hit)
527 {
528 s->s3->tmp.next_state=SSL_ST_OK;
529 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
530 {
531 s->state=SSL_ST_OK;
532 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
533 s->s3->delay_buf_pop_ret=0;
534 }
535 }
536 else
537 {
538 #ifndef OPENSSL_NO_TLSEXT
539 /* Allow NewSessionTicket if ticket expected */
540 if (s->tlsext_ticket_expected)
541 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
542 else
543 #endif
544
545 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
546 }
547 s->init_num=0;
548 break;
549
550 #ifndef OPENSSL_NO_TLSEXT
551 case SSL3_ST_CR_SESSION_TICKET_A:
552 case SSL3_ST_CR_SESSION_TICKET_B:
553 ret=ssl3_get_new_session_ticket(s);
554 if (ret <= 0) goto end;
555 s->state=SSL3_ST_CR_FINISHED_A;
556 s->init_num=0;
557 break;
558
559 case SSL3_ST_CR_CERT_STATUS_A:
560 case SSL3_ST_CR_CERT_STATUS_B:
561 ret=ssl3_get_cert_status(s);
562 if (ret <= 0) goto end;
563 s->state=SSL3_ST_CR_KEY_EXCH_A;
564 s->init_num=0;
565 break;
566 #endif
567
568 case SSL3_ST_CR_FINISHED_A:
569 case SSL3_ST_CR_FINISHED_B:
570
571 s->s3->flags |= SSL3_FLAGS_CCS_OK;
572 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
573 SSL3_ST_CR_FINISHED_B);
574 if (ret <= 0) goto end;
575
576 if (s->hit)
577 s->state=SSL3_ST_CW_CHANGE_A;
578 else
579 s->state=SSL_ST_OK;
580 s->init_num=0;
581 break;
582
583 case SSL3_ST_CW_FLUSH:
584 s->rwstate=SSL_WRITING;
585 if (BIO_flush(s->wbio) <= 0)
586 {
587 ret= -1;
588 goto end;
589 }
590 s->rwstate=SSL_NOTHING;
591 s->state=s->s3->tmp.next_state;
592 break;
593
594 case SSL_ST_OK:
595 /* clean a few things up */
596 ssl3_cleanup_key_block(s);
597
598 if (s->init_buf != NULL)
599 {
600 BUF_MEM_free(s->init_buf);
601 s->init_buf=NULL;
602 }
603
604 /* If we are not 'joining' the last two packets,
605 * remove the buffering now */
606 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
607 ssl_free_wbio_buffer(s);
608 /* else do it later in ssl3_write */
609
610 s->init_num=0;
611 s->renegotiate=0;
612 s->new_session=0;
613
614 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
615 if (s->hit) s->ctx->stats.sess_hit++;
616
617 ret=1;
618 /* s->server=0; */
619 s->handshake_func=ssl3_connect;
620 s->ctx->stats.sess_connect_good++;
621
622 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
623
624 goto end;
625 /* break; */
626
627 default:
628 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
629 ret= -1;
630 goto end;
631 /* break; */
632 }
633
634 /* did we do anything */
635 if (!s->s3->tmp.reuse_message && !skip)
636 {
637 if (s->debug)
638 {
639 if ((ret=BIO_flush(s->wbio)) <= 0)
640 goto end;
641 }
642
643 if ((cb != NULL) && (s->state != state))
644 {
645 new_state=s->state;
646 s->state=state;
647 cb(s,SSL_CB_CONNECT_LOOP,1);
648 s->state=new_state;
649 }
650 }
651 skip=0;
652 }
653 end:
654 s->in_handshake--;
655 if (buf != NULL)
656 BUF_MEM_free(buf);
657 if (cb != NULL)
658 cb(s,SSL_CB_CONNECT_EXIT,ret);
659 return(ret);
660 }
661
662
663 int ssl3_client_hello(SSL *s)
664 {
665 unsigned char *buf;
666 unsigned char *p,*d;
667 int i;
668 unsigned long l;
669 int al = 0;
670 #ifndef OPENSSL_NO_COMP
671 int j;
672 SSL_COMP *comp;
673 #endif
674
675 buf=(unsigned char *)s->init_buf->data;
676 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
677 {
678 SSL_SESSION *sess = s->session;
679 if ((sess == NULL) ||
680 (sess->ssl_version != s->version) ||
681 #ifdef OPENSSL_NO_TLSEXT
682 !sess->session_id_length ||
683 #else
684 (!sess->session_id_length && !sess->tlsext_tick) ||
685 #endif
686 (sess->not_resumable))
687 {
688 if (!ssl_get_new_session(s,0))
689 goto err;
690 }
691 if (s->method->version == DTLS_ANY_VERSION)
692 {
693 /* Determine which DTLS version to use */
694 int options = s->options;
695 /* If DTLS 1.2 disabled correct the version number */
696 if (options & SSL_OP_NO_DTLSv1_2)
697 {
698 if (tls1_suiteb(s))
699 {
700 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
701 goto err;
702 }
703 /* Disabling all versions is silly: return an
704 * error.
705 */
706 if (options & SSL_OP_NO_DTLSv1)
707 {
708 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_WRONG_SSL_VERSION);
709 goto err;
710 }
711 /* Update method so we don't use any DTLS 1.2
712 * features.
713 */
714 s->method = DTLSv1_client_method();
715 s->version = DTLS1_VERSION;
716 }
717 else
718 {
719 /* We only support one version: update method */
720 if (options & SSL_OP_NO_DTLSv1)
721 s->method = DTLSv1_2_client_method();
722 s->version = DTLS1_2_VERSION;
723 }
724 s->client_version = s->version;
725 }
726 /* else use the pre-loaded session */
727
728 p=s->s3->client_random;
729
730 /* for DTLS if client_random is initialized, reuse it, we are
731 * required to use same upon reply to HelloVerify */
732 if (SSL_IS_DTLS(s))
733 {
734 size_t idx;
735 i = 1;
736 for (idx=0; idx < sizeof(s->s3->client_random); idx++)
737 {
738 if (p[idx])
739 {
740 i = 0;
741 break;
742 }
743 }
744 }
745 else
746 i = 1;
747
748 if (i)
749 ssl_fill_hello_random(s, 0, p,
750 sizeof(s->s3->client_random));
751
752 /* Do the message type and length last */
753 d=p= ssl_handshake_start(s);
754
755 /* version indicates the negotiated version: for example from
756 * an SSLv2/v3 compatible client hello). The client_version
757 * field is the maximum version we permit and it is also
758 * used in RSA encrypted premaster secrets. Some servers can
759 * choke if we initially report a higher version then
760 * renegotiate to a lower one in the premaster secret. This
761 * didn't happen with TLS 1.0 as most servers supported it
762 * but it can with TLS 1.1 or later if the server only supports
763 * 1.0.
764 *
765 * Possible scenario with previous logic:
766 * 1. Client hello indicates TLS 1.2
767 * 2. Server hello says TLS 1.0
768 * 3. RSA encrypted premaster secret uses 1.2.
769 * 4. Handhaked proceeds using TLS 1.0.
770 * 5. Server sends hello request to renegotiate.
771 * 6. Client hello indicates TLS v1.0 as we now
772 * know that is maximum server supports.
773 * 7. Server chokes on RSA encrypted premaster secret
774 * containing version 1.0.
775 *
776 * For interoperability it should be OK to always use the
777 * maximum version we support in client hello and then rely
778 * on the checking of version to ensure the servers isn't
779 * being inconsistent: for example initially negotiating with
780 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
781 * client_version in client hello and not resetting it to
782 * the negotiated version.
783 */
784 #if 0
785 *(p++)=s->version>>8;
786 *(p++)=s->version&0xff;
787 s->client_version=s->version;
788 #else
789 *(p++)=s->client_version>>8;
790 *(p++)=s->client_version&0xff;
791 #endif
792
793 /* Random stuff */
794 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
795 p+=SSL3_RANDOM_SIZE;
796
797 /* Session ID */
798 if (s->new_session)
799 i=0;
800 else
801 i=s->session->session_id_length;
802 *(p++)=i;
803 if (i != 0)
804 {
805 if (i > (int)sizeof(s->session->session_id))
806 {
807 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
808 goto err;
809 }
810 memcpy(p,s->session->session_id,i);
811 p+=i;
812 }
813
814 /* cookie stuff for DTLS */
815 if (SSL_IS_DTLS(s))
816 {
817 if ( s->d1->cookie_len > sizeof(s->d1->cookie))
818 {
819 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
820 goto err;
821 }
822 *(p++) = s->d1->cookie_len;
823 memcpy(p, s->d1->cookie, s->d1->cookie_len);
824 p += s->d1->cookie_len;
825 }
826
827 /* Ciphers supported */
828 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
829 if (i == 0)
830 {
831 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
832 goto err;
833 }
834 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
835 /* Some servers hang if client hello > 256 bytes
836 * as hack workaround chop number of supported ciphers
837 * to keep it well below this if we use TLS v1.2
838 */
839 if (TLS1_get_version(s) >= TLS1_2_VERSION
840 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
841 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
842 #endif
843 s2n(i,p);
844 p+=i;
845
846 /* COMPRESSION */
847 #ifdef OPENSSL_NO_COMP
848 *(p++)=1;
849 #else
850
851 if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
852 j=0;
853 else
854 j=sk_SSL_COMP_num(s->ctx->comp_methods);
855 *(p++)=1+j;
856 for (i=0; i<j; i++)
857 {
858 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
859 *(p++)=comp->id;
860 }
861 #endif
862 *(p++)=0; /* Add the NULL method */
863
864 #ifndef OPENSSL_NO_TLSEXT
865 /* TLS extensions*/
866 if (ssl_prepare_clienthello_tlsext(s) <= 0)
867 {
868 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
869 goto err;
870 }
871 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH, &al)) == NULL)
872 {
873 ssl3_send_alert(s,SSL3_AL_FATAL,al);
874 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
875 goto err;
876 }
877 #endif
878
879 l= p-d;
880 ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l);
881 s->state=SSL3_ST_CW_CLNT_HELLO_B;
882 }
883
884 /* SSL3_ST_CW_CLNT_HELLO_B */
885 return ssl_do_write(s);
886 err:
887 return(-1);
888 }
889
890 int ssl3_get_server_hello(SSL *s)
891 {
892 STACK_OF(SSL_CIPHER) *sk;
893 const SSL_CIPHER *c;
894 CERT *ct = s->cert;
895 unsigned char *p,*d;
896 int i,al=SSL_AD_INTERNAL_ERROR,ok;
897 unsigned int j;
898 long n;
899 #ifndef OPENSSL_NO_COMP
900 SSL_COMP *comp;
901 #endif
902 /* Hello verify request and/or server hello version may not
903 * match so set first packet if we're negotiating version.
904 */
905 if (SSL_IS_DTLS(s))
906 s->first_packet = 1;
907
908 n=s->method->ssl_get_message(s,
909 SSL3_ST_CR_SRVR_HELLO_A,
910 SSL3_ST_CR_SRVR_HELLO_B,
911 -1,
912 20000, /* ?? */
913 &ok);
914
915 if (!ok) return((int)n);
916
917 if (SSL_IS_DTLS(s))
918 {
919 s->first_packet = 0;
920 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
921 {
922 if ( s->d1->send_cookie == 0)
923 {
924 s->s3->tmp.reuse_message = 1;
925 return 1;
926 }
927 else /* already sent a cookie */
928 {
929 al=SSL_AD_UNEXPECTED_MESSAGE;
930 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
931 goto f_err;
932 }
933 }
934 }
935
936 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
937 {
938 al=SSL_AD_UNEXPECTED_MESSAGE;
939 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
940 goto f_err;
941 }
942
943 d=p=(unsigned char *)s->init_msg;
944 if (s->method->version == DTLS_ANY_VERSION)
945 {
946 /* Work out correct protocol version to use */
947 int hversion = (p[0] << 8)|p[1];
948 int options = s->options;
949 if (hversion == DTLS1_2_VERSION
950 && !(options & SSL_OP_NO_DTLSv1_2))
951 s->method = DTLSv1_2_client_method();
952 else if (tls1_suiteb(s))
953 {
954 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
955 s->version = hversion;
956 al = SSL_AD_PROTOCOL_VERSION;
957 goto f_err;
958 }
959 else if (hversion == DTLS1_VERSION
960 && !(options & SSL_OP_NO_DTLSv1))
961 s->method = DTLSv1_client_method();
962 else
963 {
964 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
965 s->version = hversion;
966 al = SSL_AD_PROTOCOL_VERSION;
967 goto f_err;
968 }
969 s->version = s->client_version = s->method->version;
970 }
971
972 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
973 {
974 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
975 s->version=(s->version&0xff00)|p[1];
976 al=SSL_AD_PROTOCOL_VERSION;
977 goto f_err;
978 }
979 p+=2;
980
981 /* load the server hello data */
982 /* load the server random */
983 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
984 p+=SSL3_RANDOM_SIZE;
985
986 /* get the session-id */
987 j= *(p++);
988
989 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
990 {
991 al=SSL_AD_ILLEGAL_PARAMETER;
992 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
993 goto f_err;
994 }
995
996 #ifndef OPENSSL_NO_TLSEXT
997 /* check if we want to resume the session based on external pre-shared secret */
998 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
999 {
1000 SSL_CIPHER *pref_cipher=NULL;
1001 s->session->master_key_length=sizeof(s->session->master_key);
1002 if (s->tls_session_secret_cb(s, s->session->master_key,
1003 &s->session->master_key_length,
1004 NULL, &pref_cipher,
1005 s->tls_session_secret_cb_arg))
1006 {
1007 s->session->cipher = pref_cipher ?
1008 pref_cipher : ssl_get_cipher_by_char(s, p+j);
1009 s->s3->flags |= SSL3_FLAGS_CCS_OK;
1010 }
1011 }
1012 #endif /* OPENSSL_NO_TLSEXT */
1013
1014 if (j != 0 && j == s->session->session_id_length
1015 && memcmp(p,s->session->session_id,j) == 0)
1016 {
1017 if(s->sid_ctx_length != s->session->sid_ctx_length
1018 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
1019 {
1020 /* actually a client application bug */
1021 al=SSL_AD_ILLEGAL_PARAMETER;
1022 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
1023 goto f_err;
1024 }
1025 s->s3->flags |= SSL3_FLAGS_CCS_OK;
1026 s->hit=1;
1027 }
1028 else /* a miss or crap from the other end */
1029 {
1030 /* If we were trying for session-id reuse, make a new
1031 * SSL_SESSION so we don't stuff up other people */
1032 s->hit=0;
1033 if (s->session->session_id_length > 0)
1034 {
1035 if (!ssl_get_new_session(s,0))
1036 {
1037 goto f_err;
1038 }
1039 }
1040 s->session->session_id_length=j;
1041 memcpy(s->session->session_id,p,j); /* j could be 0 */
1042 }
1043 p+=j;
1044 c=ssl_get_cipher_by_char(s,p);
1045 if (c == NULL)
1046 {
1047 /* unknown cipher */
1048 al=SSL_AD_ILLEGAL_PARAMETER;
1049 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
1050 goto f_err;
1051 }
1052 /* Set version disabled mask now we know version */
1053 if (!SSL_USE_TLS1_2_CIPHERS(s))
1054 ct->mask_ssl = SSL_TLSV1_2;
1055 else
1056 ct->mask_ssl = 0;
1057 /* If it is a disabled cipher we didn't send it in client hello,
1058 * so return an error.
1059 */
1060 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK))
1061 {
1062 al=SSL_AD_ILLEGAL_PARAMETER;
1063 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1064 goto f_err;
1065 }
1066 p+=ssl_put_cipher_by_char(s,NULL,NULL);
1067
1068 sk=ssl_get_ciphers_by_id(s);
1069 i=sk_SSL_CIPHER_find(sk,c);
1070 if (i < 0)
1071 {
1072 /* we did not say we would use this cipher */
1073 al=SSL_AD_ILLEGAL_PARAMETER;
1074 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1075 goto f_err;
1076 }
1077
1078 /* Depending on the session caching (internal/external), the cipher
1079 and/or cipher_id values may not be set. Make sure that
1080 cipher_id is set and use it for comparison. */
1081 if (s->session->cipher)
1082 s->session->cipher_id = s->session->cipher->id;
1083 if (s->hit && (s->session->cipher_id != c->id))
1084 {
1085 /* Workaround is now obsolete */
1086 #if 0
1087 if (!(s->options &
1088 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
1089 #endif
1090 {
1091 al=SSL_AD_ILLEGAL_PARAMETER;
1092 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1093 goto f_err;
1094 }
1095 }
1096 s->s3->tmp.new_cipher=c;
1097 /* Don't digest cached records if no sigalgs: we may need them for
1098 * client authentication.
1099 */
1100 if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s))
1101 goto f_err;
1102 /* lets get the compression algorithm */
1103 /* COMPRESSION */
1104 #ifdef OPENSSL_NO_COMP
1105 if (*(p++) != 0)
1106 {
1107 al=SSL_AD_ILLEGAL_PARAMETER;
1108 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1109 goto f_err;
1110 }
1111 /* If compression is disabled we'd better not try to resume a session
1112 * using compression.
1113 */
1114 if (s->session->compress_meth != 0)
1115 {
1116 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1117 goto f_err;
1118 }
1119 #else
1120 j= *(p++);
1121 if (s->hit && j != s->session->compress_meth)
1122 {
1123 al=SSL_AD_ILLEGAL_PARAMETER;
1124 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1125 goto f_err;
1126 }
1127 if (j == 0)
1128 comp=NULL;
1129 else if (!ssl_allow_compression(s))
1130 {
1131 al=SSL_AD_ILLEGAL_PARAMETER;
1132 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1133 goto f_err;
1134 }
1135 else
1136 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1137
1138 if ((j != 0) && (comp == NULL))
1139 {
1140 al=SSL_AD_ILLEGAL_PARAMETER;
1141 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1142 goto f_err;
1143 }
1144 else
1145 {
1146 s->s3->tmp.new_compression=comp;
1147 }
1148 #endif
1149
1150 #ifndef OPENSSL_NO_TLSEXT
1151 /* TLS extensions*/
1152 if (!ssl_parse_serverhello_tlsext(s,&p,d,n))
1153 {
1154 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1155 goto err;
1156 }
1157 #endif
1158
1159 if (p != (d+n))
1160 {
1161 /* wrong packet length */
1162 al=SSL_AD_DECODE_ERROR;
1163 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1164 goto f_err;
1165 }
1166
1167 return(1);
1168 f_err:
1169 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1170 err:
1171 return(-1);
1172 }
1173
1174 int ssl3_get_server_certificate(SSL *s)
1175 {
1176 int al,i,ok,ret= -1;
1177 unsigned long n,nc,llen,l;
1178 X509 *x=NULL;
1179 const unsigned char *q,*p;
1180 unsigned char *d;
1181 STACK_OF(X509) *sk=NULL;
1182 SESS_CERT *sc;
1183 EVP_PKEY *pkey=NULL;
1184 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1185
1186 n=s->method->ssl_get_message(s,
1187 SSL3_ST_CR_CERT_A,
1188 SSL3_ST_CR_CERT_B,
1189 -1,
1190 s->max_cert_list,
1191 &ok);
1192
1193 if (!ok) return((int)n);
1194
1195 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1196 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1197 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1198 {
1199 s->s3->tmp.reuse_message=1;
1200 return(1);
1201 }
1202
1203 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1204 {
1205 al=SSL_AD_UNEXPECTED_MESSAGE;
1206 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1207 goto f_err;
1208 }
1209 p=d=(unsigned char *)s->init_msg;
1210
1211 if ((sk=sk_X509_new_null()) == NULL)
1212 {
1213 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1214 goto err;
1215 }
1216
1217 n2l3(p,llen);
1218 if (llen+3 != n)
1219 {
1220 al=SSL_AD_DECODE_ERROR;
1221 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1222 goto f_err;
1223 }
1224 for (nc=0; nc<llen; )
1225 {
1226 n2l3(p,l);
1227 if ((l+nc+3) > llen)
1228 {
1229 al=SSL_AD_DECODE_ERROR;
1230 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1231 goto f_err;
1232 }
1233
1234 q=p;
1235 x=d2i_X509(NULL,&q,l);
1236 if (x == NULL)
1237 {
1238 al=SSL_AD_BAD_CERTIFICATE;
1239 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1240 goto f_err;
1241 }
1242 if (q != (p+l))
1243 {
1244 al=SSL_AD_DECODE_ERROR;
1245 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1246 goto f_err;
1247 }
1248 if (!sk_X509_push(sk,x))
1249 {
1250 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1251 goto err;
1252 }
1253 x=NULL;
1254 nc+=l+3;
1255 p=q;
1256 }
1257
1258 i=ssl_verify_cert_chain(s,sk);
1259 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1260 #ifndef OPENSSL_NO_KRB5
1261 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1262 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1263 #endif /* OPENSSL_NO_KRB5 */
1264 )
1265 {
1266 al=ssl_verify_alarm_type(s->verify_result);
1267 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1268 goto f_err;
1269 }
1270 ERR_clear_error(); /* but we keep s->verify_result */
1271 if (i > 1)
1272 {
1273 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, i);
1274 al = SSL_AD_HANDSHAKE_FAILURE;
1275 goto f_err;
1276 }
1277
1278 sc=ssl_sess_cert_new();
1279 if (sc == NULL) goto err;
1280
1281 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1282 s->session->sess_cert=sc;
1283
1284 sc->cert_chain=sk;
1285 /* Inconsistency alert: cert_chain does include the peer's
1286 * certificate, which we don't include in s3_srvr.c */
1287 x=sk_X509_value(sk,0);
1288 sk=NULL;
1289 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1290
1291 pkey=X509_get_pubkey(x);
1292
1293 /* VRS: allow null cert if auth == KRB5 */
1294 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1295 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1296 ? 0 : 1;
1297
1298 #ifdef KSSL_DEBUG
1299 printf("pkey,x = %p, %p\n", pkey,x);
1300 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1301 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1302 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1303 #endif /* KSSL_DEBUG */
1304
1305 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1306 {
1307 x=NULL;
1308 al=SSL3_AL_FATAL;
1309 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1310 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1311 goto f_err;
1312 }
1313
1314 i=ssl_cert_type(x,pkey);
1315 if (need_cert && i < 0)
1316 {
1317 x=NULL;
1318 al=SSL3_AL_FATAL;
1319 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1320 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1321 goto f_err;
1322 }
1323
1324 if (need_cert)
1325 {
1326 int exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1327 if (exp_idx >= 0 && i != exp_idx)
1328 {
1329 x=NULL;
1330 al=SSL_AD_ILLEGAL_PARAMETER;
1331 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1332 SSL_R_WRONG_CERTIFICATE_TYPE);
1333 goto f_err;
1334 }
1335 sc->peer_cert_type=i;
1336 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1337 /* Why would the following ever happen?
1338 * We just created sc a couple of lines ago. */
1339 if (sc->peer_pkeys[i].x509 != NULL)
1340 X509_free(sc->peer_pkeys[i].x509);
1341 sc->peer_pkeys[i].x509=x;
1342 sc->peer_key= &(sc->peer_pkeys[i]);
1343
1344 if (s->session->peer != NULL)
1345 X509_free(s->session->peer);
1346 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1347 s->session->peer=x;
1348 }
1349 else
1350 {
1351 sc->peer_cert_type=i;
1352 sc->peer_key= NULL;
1353
1354 if (s->session->peer != NULL)
1355 X509_free(s->session->peer);
1356 s->session->peer=NULL;
1357 }
1358 s->session->verify_result = s->verify_result;
1359
1360 x=NULL;
1361 ret=1;
1362 if (0)
1363 {
1364 f_err:
1365 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1366 }
1367 err:
1368 EVP_PKEY_free(pkey);
1369 X509_free(x);
1370 sk_X509_pop_free(sk,X509_free);
1371 return(ret);
1372 }
1373
1374 int ssl3_get_key_exchange(SSL *s)
1375 {
1376 #ifndef OPENSSL_NO_RSA
1377 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1378 #endif
1379 EVP_MD_CTX md_ctx;
1380 unsigned char *param,*p;
1381 int al,j,ok;
1382 long i,param_len,n,alg_k,alg_a;
1383 EVP_PKEY *pkey=NULL;
1384 const EVP_MD *md = NULL;
1385 #ifndef OPENSSL_NO_RSA
1386 RSA *rsa=NULL;
1387 #endif
1388 #ifndef OPENSSL_NO_DH
1389 DH *dh=NULL;
1390 #endif
1391 #ifndef OPENSSL_NO_ECDH
1392 EC_KEY *ecdh = NULL;
1393 BN_CTX *bn_ctx = NULL;
1394 EC_POINT *srvr_ecpoint = NULL;
1395 int curve_nid = 0;
1396 int encoded_pt_len = 0;
1397 #endif
1398
1399 /* use same message size as in ssl3_get_certificate_request()
1400 * as ServerKeyExchange message may be skipped */
1401 n=s->method->ssl_get_message(s,
1402 SSL3_ST_CR_KEY_EXCH_A,
1403 SSL3_ST_CR_KEY_EXCH_B,
1404 -1,
1405 s->max_cert_list,
1406 &ok);
1407 if (!ok) return((int)n);
1408
1409 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1410 {
1411 #ifndef OPENSSL_NO_PSK
1412 /* In plain PSK ciphersuite, ServerKeyExchange can be
1413 omitted if no identity hint is sent. Set
1414 session->sess_cert anyway to avoid problems
1415 later.*/
1416 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1417 {
1418 s->session->sess_cert=ssl_sess_cert_new();
1419 if (s->ctx->psk_identity_hint)
1420 OPENSSL_free(s->ctx->psk_identity_hint);
1421 s->ctx->psk_identity_hint = NULL;
1422 }
1423 #endif
1424 s->s3->tmp.reuse_message=1;
1425 return(1);
1426 }
1427
1428 param=p=(unsigned char *)s->init_msg;
1429 if (s->session->sess_cert != NULL)
1430 {
1431 #ifndef OPENSSL_NO_RSA
1432 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1433 {
1434 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1435 s->session->sess_cert->peer_rsa_tmp=NULL;
1436 }
1437 #endif
1438 #ifndef OPENSSL_NO_DH
1439 if (s->session->sess_cert->peer_dh_tmp)
1440 {
1441 DH_free(s->session->sess_cert->peer_dh_tmp);
1442 s->session->sess_cert->peer_dh_tmp=NULL;
1443 }
1444 #endif
1445 #ifndef OPENSSL_NO_ECDH
1446 if (s->session->sess_cert->peer_ecdh_tmp)
1447 {
1448 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1449 s->session->sess_cert->peer_ecdh_tmp=NULL;
1450 }
1451 #endif
1452 }
1453 else
1454 {
1455 s->session->sess_cert=ssl_sess_cert_new();
1456 }
1457
1458 /* Total length of the parameters including the length prefix */
1459 param_len=0;
1460
1461 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1462 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1463 EVP_MD_CTX_init(&md_ctx);
1464
1465 al=SSL_AD_DECODE_ERROR;
1466
1467 #ifndef OPENSSL_NO_PSK
1468 if (alg_k & SSL_kPSK)
1469 {
1470 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1471
1472 param_len = 2;
1473 if (param_len > n)
1474 {
1475 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1476 SSL_R_LENGTH_TOO_SHORT);
1477 goto f_err;
1478 }
1479 n2s(p,i);
1480
1481 /* Store PSK identity hint for later use, hint is used
1482 * in ssl3_send_client_key_exchange. Assume that the
1483 * maximum length of a PSK identity hint can be as
1484 * long as the maximum length of a PSK identity. */
1485 if (i > PSK_MAX_IDENTITY_LEN)
1486 {
1487 al=SSL_AD_HANDSHAKE_FAILURE;
1488 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1489 SSL_R_DATA_LENGTH_TOO_LONG);
1490 goto f_err;
1491 }
1492 if (i > n - param_len)
1493 {
1494 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1495 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1496 goto f_err;
1497 }
1498 param_len += i;
1499
1500 /* If received PSK identity hint contains NULL
1501 * characters, the hint is truncated from the first
1502 * NULL. p may not be ending with NULL, so create a
1503 * NULL-terminated string. */
1504 memcpy(tmp_id_hint, p, i);
1505 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1506 if (s->ctx->psk_identity_hint != NULL)
1507 OPENSSL_free(s->ctx->psk_identity_hint);
1508 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1509 if (s->ctx->psk_identity_hint == NULL)
1510 {
1511 al=SSL_AD_HANDSHAKE_FAILURE;
1512 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1513 goto f_err;
1514 }
1515
1516 p+=i;
1517 n-=param_len;
1518 }
1519 else
1520 #endif /* !OPENSSL_NO_PSK */
1521 #ifndef OPENSSL_NO_SRP
1522 if (alg_k & SSL_kSRP)
1523 {
1524 param_len = 2;
1525 if (param_len > n)
1526 {
1527 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1528 SSL_R_LENGTH_TOO_SHORT);
1529 goto f_err;
1530 }
1531 n2s(p,i);
1532
1533 if (i > n - param_len)
1534 {
1535 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1536 goto f_err;
1537 }
1538 param_len += i;
1539
1540 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1541 {
1542 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1543 goto err;
1544 }
1545 p+=i;
1546
1547
1548 if (2 > n - param_len)
1549 {
1550 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1551 SSL_R_LENGTH_TOO_SHORT);
1552 goto f_err;
1553 }
1554 param_len += 2;
1555
1556 n2s(p,i);
1557
1558 if (i > n - param_len)
1559 {
1560 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1561 goto f_err;
1562 }
1563 param_len += i;
1564
1565 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1566 {
1567 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1568 goto err;
1569 }
1570 p+=i;
1571
1572
1573 if (1 > n - param_len)
1574 {
1575 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1576 SSL_R_LENGTH_TOO_SHORT);
1577 goto f_err;
1578 }
1579 param_len += 1;
1580
1581 i = (unsigned int)(p[0]);
1582 p++;
1583
1584 if (i > n - param_len)
1585 {
1586 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1587 goto f_err;
1588 }
1589 param_len += i;
1590
1591 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1592 {
1593 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1594 goto err;
1595 }
1596 p+=i;
1597
1598 if (2 > n - param_len)
1599 {
1600 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1601 SSL_R_LENGTH_TOO_SHORT);
1602 goto f_err;
1603 }
1604 param_len += 2;
1605
1606 n2s(p,i);
1607
1608 if (i > n - param_len)
1609 {
1610 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1611 goto f_err;
1612 }
1613 param_len += i;
1614
1615 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1616 {
1617 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1618 goto err;
1619 }
1620 p+=i;
1621 n-=param_len;
1622
1623 if (!srp_verify_server_param(s, &al))
1624 {
1625 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_PARAMETERS);
1626 goto f_err;
1627 }
1628
1629 /* We must check if there is a certificate */
1630 #ifndef OPENSSL_NO_RSA
1631 if (alg_a & SSL_aRSA)
1632 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1633 #else
1634 if (0)
1635 ;
1636 #endif
1637 #ifndef OPENSSL_NO_DSA
1638 else if (alg_a & SSL_aDSS)
1639 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1640 #endif
1641 }
1642 else
1643 #endif /* !OPENSSL_NO_SRP */
1644 #ifndef OPENSSL_NO_RSA
1645 if (alg_k & SSL_kRSA)
1646 {
1647 if ((rsa=RSA_new()) == NULL)
1648 {
1649 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1650 goto err;
1651 }
1652
1653 param_len = 2;
1654 if (param_len > n)
1655 {
1656 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1657 SSL_R_LENGTH_TOO_SHORT);
1658 goto f_err;
1659 }
1660 n2s(p,i);
1661
1662 if (i > n - param_len)
1663 {
1664 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1665 goto f_err;
1666 }
1667 param_len += i;
1668
1669 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1670 {
1671 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1672 goto err;
1673 }
1674 p+=i;
1675
1676 if (2 > n - param_len)
1677 {
1678 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1679 SSL_R_LENGTH_TOO_SHORT);
1680 goto f_err;
1681 }
1682 param_len += 2;
1683
1684 n2s(p,i);
1685
1686 if (i > n - param_len)
1687 {
1688 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1689 goto f_err;
1690 }
1691 param_len += i;
1692
1693 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1694 {
1695 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1696 goto err;
1697 }
1698 p+=i;
1699 n-=param_len;
1700
1701 /* this should be because we are using an export cipher */
1702 if (alg_a & SSL_aRSA)
1703 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1704 else
1705 {
1706 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1707 goto err;
1708 }
1709 s->session->sess_cert->peer_rsa_tmp=rsa;
1710 rsa=NULL;
1711 }
1712 #else /* OPENSSL_NO_RSA */
1713 if (0)
1714 ;
1715 #endif
1716 #ifndef OPENSSL_NO_DH
1717 else if (alg_k & SSL_kDHE)
1718 {
1719 if ((dh=DH_new()) == NULL)
1720 {
1721 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1722 goto err;
1723 }
1724
1725 param_len = 2;
1726 if (param_len > n)
1727 {
1728 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1729 SSL_R_LENGTH_TOO_SHORT);
1730 goto f_err;
1731 }
1732 n2s(p,i);
1733
1734 if (i > n - param_len)
1735 {
1736 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1737 goto f_err;
1738 }
1739 param_len += i;
1740
1741 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1742 {
1743 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1744 goto err;
1745 }
1746 p+=i;
1747
1748 if (2 > n - param_len)
1749 {
1750 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1751 SSL_R_LENGTH_TOO_SHORT);
1752 goto f_err;
1753 }
1754 param_len += 2;
1755
1756 n2s(p,i);
1757
1758 if (i > n - param_len)
1759 {
1760 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1761 goto f_err;
1762 }
1763 param_len += i;
1764
1765 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1766 {
1767 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1768 goto err;
1769 }
1770 p+=i;
1771
1772 if (2 > n - param_len)
1773 {
1774 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1775 SSL_R_LENGTH_TOO_SHORT);
1776 goto f_err;
1777 }
1778 param_len += 2;
1779
1780 n2s(p,i);
1781
1782 if (i > n - param_len)
1783 {
1784 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1785 goto f_err;
1786 }
1787 param_len += i;
1788
1789 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1790 {
1791 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1792 goto err;
1793 }
1794 p+=i;
1795 n-=param_len;
1796
1797 if (!ssl_security(s, SSL_SECOP_TMP_DH,
1798 DH_security_bits(dh), 0, dh))
1799 {
1800 al=SSL_AD_HANDSHAKE_FAILURE;
1801 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_DH_KEY_TOO_SMALL);
1802 goto f_err;
1803 }
1804
1805 #ifndef OPENSSL_NO_RSA
1806 if (alg_a & SSL_aRSA)
1807 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1808 #else
1809 if (0)
1810 ;
1811 #endif
1812 #ifndef OPENSSL_NO_DSA
1813 else if (alg_a & SSL_aDSS)
1814 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1815 #endif
1816 /* else anonymous DH, so no certificate or pkey. */
1817
1818 s->session->sess_cert->peer_dh_tmp=dh;
1819 dh=NULL;
1820 }
1821 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1822 {
1823 al=SSL_AD_ILLEGAL_PARAMETER;
1824 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1825 goto f_err;
1826 }
1827 #endif /* !OPENSSL_NO_DH */
1828
1829 #ifndef OPENSSL_NO_ECDH
1830 else if (alg_k & SSL_kECDHE)
1831 {
1832 EC_GROUP *ngroup;
1833 const EC_GROUP *group;
1834
1835 if ((ecdh=EC_KEY_new()) == NULL)
1836 {
1837 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1838 goto err;
1839 }
1840
1841 /* Extract elliptic curve parameters and the
1842 * server's ephemeral ECDH public key.
1843 * Keep accumulating lengths of various components in
1844 * param_len and make sure it never exceeds n.
1845 */
1846
1847 /* XXX: For now we only support named (not generic) curves
1848 * and the ECParameters in this case is just three bytes. We
1849 * also need one byte for the length of the encoded point
1850 */
1851 param_len=4;
1852 if (param_len > n)
1853 {
1854 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1855 SSL_R_LENGTH_TOO_SHORT);
1856 goto f_err;
1857 }
1858 /* Check curve is one of our preferences, if not server has
1859 * sent an invalid curve. ECParameters is 3 bytes.
1860 */
1861 if (!tls1_check_curve(s, p, 3))
1862 {
1863 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_CURVE);
1864 goto f_err;
1865 }
1866
1867 if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)
1868 {
1869 al=SSL_AD_INTERNAL_ERROR;
1870 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1871 goto f_err;
1872 }
1873
1874 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1875 if (ngroup == NULL)
1876 {
1877 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1878 goto err;
1879 }
1880 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1881 {
1882 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1883 goto err;
1884 }
1885 EC_GROUP_free(ngroup);
1886
1887 group = EC_KEY_get0_group(ecdh);
1888
1889 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1890 (EC_GROUP_get_degree(group) > 163))
1891 {
1892 al=SSL_AD_EXPORT_RESTRICTION;
1893 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1894 goto f_err;
1895 }
1896
1897 p+=3;
1898
1899 /* Next, get the encoded ECPoint */
1900 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1901 ((bn_ctx = BN_CTX_new()) == NULL))
1902 {
1903 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1904 goto err;
1905 }
1906
1907 encoded_pt_len = *p; /* length of encoded point */
1908 p+=1;
1909
1910 if ((encoded_pt_len > n - param_len) ||
1911 (EC_POINT_oct2point(group, srvr_ecpoint,
1912 p, encoded_pt_len, bn_ctx) == 0))
1913 {
1914 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1915 goto f_err;
1916 }
1917 param_len += encoded_pt_len;
1918
1919 n-=param_len;
1920 p+=encoded_pt_len;
1921
1922 /* The ECC/TLS specification does not mention
1923 * the use of DSA to sign ECParameters in the server
1924 * key exchange message. We do support RSA and ECDSA.
1925 */
1926 if (0) ;
1927 #ifndef OPENSSL_NO_RSA
1928 else if (alg_a & SSL_aRSA)
1929 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1930 #endif
1931 #ifndef OPENSSL_NO_ECDSA
1932 else if (alg_a & SSL_aECDSA)
1933 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1934 #endif
1935 /* else anonymous ECDH, so no certificate or pkey. */
1936 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1937 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1938 ecdh=NULL;
1939 BN_CTX_free(bn_ctx);
1940 bn_ctx = NULL;
1941 EC_POINT_free(srvr_ecpoint);
1942 srvr_ecpoint = NULL;
1943 }
1944 else if (alg_k)
1945 {
1946 al=SSL_AD_UNEXPECTED_MESSAGE;
1947 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1948 goto f_err;
1949 }
1950 #endif /* !OPENSSL_NO_ECDH */
1951
1952
1953 /* p points to the next byte, there are 'n' bytes left */
1954
1955 /* if it was signed, check the signature */
1956 if (pkey != NULL)
1957 {
1958 if (SSL_USE_SIGALGS(s))
1959 {
1960 int rv;
1961 if (2 > n)
1962 {
1963 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1964 SSL_R_LENGTH_TOO_SHORT);
1965 goto f_err;
1966 }
1967 rv = tls12_check_peer_sigalg(&md, s, p, pkey);
1968 if (rv == -1)
1969 goto err;
1970 else if (rv == 0)
1971 {
1972 goto f_err;
1973 }
1974 #ifdef SSL_DEBUG
1975 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1976 #endif
1977 p += 2;
1978 n -= 2;
1979 }
1980 else
1981 md = EVP_sha1();
1982
1983 if (2 > n)
1984 {
1985 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1986 SSL_R_LENGTH_TOO_SHORT);
1987 goto f_err;
1988 }
1989 n2s(p,i);
1990 n-=2;
1991 j=EVP_PKEY_size(pkey);
1992
1993 /* Check signature length. If n is 0 then signature is empty */
1994 if ((i != n) || (n > j) || (n <= 0))
1995 {
1996 /* wrong packet length */
1997 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1998 goto f_err;
1999 }
2000
2001 #ifndef OPENSSL_NO_RSA
2002 if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s))
2003 {
2004 int num;
2005 unsigned int size;
2006
2007 j=0;
2008 q=md_buf;
2009 for (num=2; num > 0; num--)
2010 {
2011 EVP_MD_CTX_set_flags(&md_ctx,
2012 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
2013 EVP_DigestInit_ex(&md_ctx,(num == 2)
2014 ?s->ctx->md5:s->ctx->sha1, NULL);
2015 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
2016 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
2017 EVP_DigestUpdate(&md_ctx,param,param_len);
2018 EVP_DigestFinal_ex(&md_ctx,q,&size);
2019 q+=size;
2020 j+=size;
2021 }
2022 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
2023 pkey->pkey.rsa);
2024 if (i < 0)
2025 {
2026 al=SSL_AD_DECRYPT_ERROR;
2027 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
2028 goto f_err;
2029 }
2030 if (i == 0)
2031 {
2032 /* bad signature */
2033 al=SSL_AD_DECRYPT_ERROR;
2034 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
2035 goto f_err;
2036 }
2037 }
2038 else
2039 #endif
2040 {
2041 EVP_VerifyInit_ex(&md_ctx, md, NULL);
2042 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
2043 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
2044 EVP_VerifyUpdate(&md_ctx,param,param_len);
2045 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
2046 {
2047 /* bad signature */
2048 al=SSL_AD_DECRYPT_ERROR;
2049 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
2050 goto f_err;
2051 }
2052 }
2053 }
2054 else
2055 {
2056 /* aNULL, aSRP or kPSK do not need public keys */
2057 if (!(alg_a & (SSL_aNULL|SSL_aSRP)) && !(alg_k & SSL_kPSK))
2058 {
2059 /* Might be wrong key type, check it */
2060 if (ssl3_check_cert_and_algorithm(s))
2061 /* Otherwise this shouldn't happen */
2062 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2063 goto err;
2064 }
2065 /* still data left over */
2066 if (n != 0)
2067 {
2068 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
2069 goto f_err;
2070 }
2071 }
2072 EVP_PKEY_free(pkey);
2073 EVP_MD_CTX_cleanup(&md_ctx);
2074 return(1);
2075 f_err:
2076 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2077 err:
2078 EVP_PKEY_free(pkey);
2079 #ifndef OPENSSL_NO_RSA
2080 if (rsa != NULL)
2081 RSA_free(rsa);
2082 #endif
2083 #ifndef OPENSSL_NO_DH
2084 if (dh != NULL)
2085 DH_free(dh);
2086 #endif
2087 #ifndef OPENSSL_NO_ECDH
2088 BN_CTX_free(bn_ctx);
2089 EC_POINT_free(srvr_ecpoint);
2090 if (ecdh != NULL)
2091 EC_KEY_free(ecdh);
2092 #endif
2093 EVP_MD_CTX_cleanup(&md_ctx);
2094 return(-1);
2095 }
2096
2097 int ssl3_get_certificate_request(SSL *s)
2098 {
2099 int ok,ret=0;
2100 unsigned long n,nc,l;
2101 unsigned int llen, ctype_num,i;
2102 X509_NAME *xn=NULL;
2103 const unsigned char *p,*q;
2104 unsigned char *d;
2105 STACK_OF(X509_NAME) *ca_sk=NULL;
2106
2107 n=s->method->ssl_get_message(s,
2108 SSL3_ST_CR_CERT_REQ_A,
2109 SSL3_ST_CR_CERT_REQ_B,
2110 -1,
2111 s->max_cert_list,
2112 &ok);
2113
2114 if (!ok) return((int)n);
2115
2116 s->s3->tmp.cert_req=0;
2117
2118 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
2119 {
2120 s->s3->tmp.reuse_message=1;
2121 /* If we get here we don't need any cached handshake records
2122 * as we wont be doing client auth.
2123 */
2124 if (s->s3->handshake_buffer)
2125 {
2126 if (!ssl3_digest_cached_records(s))
2127 goto err;
2128 }
2129 return(1);
2130 }
2131
2132 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
2133 {
2134 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2135 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
2136 goto err;
2137 }
2138
2139 /* TLS does not like anon-DH with client cert */
2140 if (s->version > SSL3_VERSION)
2141 {
2142 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
2143 {
2144 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2145 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
2146 goto err;
2147 }
2148 }
2149
2150 p=d=(unsigned char *)s->init_msg;
2151
2152 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
2153 {
2154 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2155 goto err;
2156 }
2157
2158 /* get the certificate types */
2159 ctype_num= *(p++);
2160 if (s->cert->ctypes)
2161 {
2162 OPENSSL_free(s->cert->ctypes);
2163 s->cert->ctypes = NULL;
2164 }
2165 if (ctype_num > SSL3_CT_NUMBER)
2166 {
2167 /* If we exceed static buffer copy all to cert structure */
2168 s->cert->ctypes = OPENSSL_malloc(ctype_num);
2169 memcpy(s->cert->ctypes, p, ctype_num);
2170 s->cert->ctype_num = (size_t)ctype_num;
2171 ctype_num=SSL3_CT_NUMBER;
2172 }
2173 for (i=0; i<ctype_num; i++)
2174 s->s3->tmp.ctype[i]= p[i];
2175 p+=p[-1];
2176 if (SSL_USE_SIGALGS(s))
2177 {
2178 n2s(p, llen);
2179 /* Check we have enough room for signature algorithms and
2180 * following length value.
2181 */
2182 if ((unsigned long)(p - d + llen + 2) > n)
2183 {
2184 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2185 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
2186 goto err;
2187 }
2188 /* Clear certificate digests and validity flags */
2189 for (i = 0; i < SSL_PKEY_NUM; i++)
2190 {
2191 s->cert->pkeys[i].digest = NULL;
2192 s->cert->pkeys[i].valid_flags = 0;
2193 }
2194 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen))
2195 {
2196 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2197 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2198 goto err;
2199 }
2200 p += llen;
2201 }
2202
2203 /* get the CA RDNs */
2204 n2s(p,llen);
2205 #if 0
2206 {
2207 FILE *out;
2208 out=fopen("/tmp/vsign.der","w");
2209 fwrite(p,1,llen,out);
2210 fclose(out);
2211 }
2212 #endif
2213
2214 if ((unsigned long)(p - d + llen) != n)
2215 {
2216 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2217 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
2218 goto err;
2219 }
2220
2221 for (nc=0; nc<llen; )
2222 {
2223 n2s(p,l);
2224 if ((l+nc+2) > llen)
2225 {
2226 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
2227 goto cont; /* netscape bugs */
2228 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2229 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
2230 goto err;
2231 }
2232
2233 q=p;
2234
2235 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
2236 {
2237 /* If netscape tolerance is on, ignore errors */
2238 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
2239 goto cont;
2240 else
2241 {
2242 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2243 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
2244 goto err;
2245 }
2246 }
2247
2248 if (q != (p+l))
2249 {
2250 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2251 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
2252 goto err;
2253 }
2254 if (!sk_X509_NAME_push(ca_sk,xn))
2255 {
2256 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2257 goto err;
2258 }
2259
2260 p+=l;
2261 nc+=l+2;
2262 }
2263
2264 if (0)
2265 {
2266 cont:
2267 ERR_clear_error();
2268 }
2269
2270 /* we should setup a certificate to return.... */
2271 s->s3->tmp.cert_req=1;
2272 s->s3->tmp.ctype_num=ctype_num;
2273 if (s->s3->tmp.ca_names != NULL)
2274 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2275 s->s3->tmp.ca_names=ca_sk;
2276 ca_sk=NULL;
2277
2278 ret=1;
2279 err:
2280 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2281 return(ret);
2282 }
2283
2284 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2285 {
2286 return(X509_NAME_cmp(*a,*b));
2287 }
2288 #ifndef OPENSSL_NO_TLSEXT
2289 int ssl3_get_new_session_ticket(SSL *s)
2290 {
2291 int ok,al,ret=0, ticklen;
2292 long n;
2293 const unsigned char *p;
2294 unsigned char *d;
2295
2296 n=s->method->ssl_get_message(s,
2297 SSL3_ST_CR_SESSION_TICKET_A,
2298 SSL3_ST_CR_SESSION_TICKET_B,
2299 -1,
2300 16384,
2301 &ok);
2302
2303 if (!ok)
2304 return((int)n);
2305
2306 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
2307 {
2308 s->s3->tmp.reuse_message=1;
2309 return(1);
2310 }
2311 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
2312 {
2313 al=SSL_AD_UNEXPECTED_MESSAGE;
2314 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2315 goto f_err;
2316 }
2317 if (n < 6)
2318 {
2319 /* need at least ticket_lifetime_hint + ticket length */
2320 al = SSL_AD_DECODE_ERROR;
2321 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2322 goto f_err;
2323 }
2324
2325 p=d=(unsigned char *)s->init_msg;
2326 n2l(p, s->session->tlsext_tick_lifetime_hint);
2327 n2s(p, ticklen);
2328 /* ticket_lifetime_hint + ticket_length + ticket */
2329 if (ticklen + 6 != n)
2330 {
2331 al = SSL_AD_DECODE_ERROR;
2332 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2333 goto f_err;
2334 }
2335 if (s->session->tlsext_tick)
2336 {
2337 OPENSSL_free(s->session->tlsext_tick);
2338 s->session->tlsext_ticklen = 0;
2339 }
2340 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2341 if (!s->session->tlsext_tick)
2342 {
2343 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2344 goto err;
2345 }
2346 memcpy(s->session->tlsext_tick, p, ticklen);
2347 s->session->tlsext_ticklen = ticklen;
2348 /* There are two ways to detect a resumed ticket sesion.
2349 * One is to set an appropriate session ID and then the server
2350 * must return a match in ServerHello. This allows the normal
2351 * client session ID matching to work and we know much
2352 * earlier that the ticket has been accepted.
2353 *
2354 * The other way is to set zero length session ID when the
2355 * ticket is presented and rely on the handshake to determine
2356 * session resumption.
2357 *
2358 * We choose the former approach because this fits in with
2359 * assumptions elsewhere in OpenSSL. The session ID is set
2360 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2361 * ticket.
2362 */
2363 EVP_Digest(p, ticklen,
2364 s->session->session_id, &s->session->session_id_length,
2365 #ifndef OPENSSL_NO_SHA256
2366 EVP_sha256(), NULL);
2367 #else
2368 EVP_sha1(), NULL);
2369 #endif
2370 ret=1;
2371 return(ret);
2372 f_err:
2373 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2374 err:
2375 return(-1);
2376 }
2377
2378 int ssl3_get_cert_status(SSL *s)
2379 {
2380 int ok, al;
2381 unsigned long resplen,n;
2382 const unsigned char *p;
2383
2384 n=s->method->ssl_get_message(s,
2385 SSL3_ST_CR_CERT_STATUS_A,
2386 SSL3_ST_CR_CERT_STATUS_B,
2387 SSL3_MT_CERTIFICATE_STATUS,
2388 16384,
2389 &ok);
2390
2391 if (!ok) return((int)n);
2392 if (n < 4)
2393 {
2394 /* need at least status type + length */
2395 al = SSL_AD_DECODE_ERROR;
2396 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2397 goto f_err;
2398 }
2399 p = (unsigned char *)s->init_msg;
2400 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2401 {
2402 al = SSL_AD_DECODE_ERROR;
2403 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2404 goto f_err;
2405 }
2406 n2l3(p, resplen);
2407 if (resplen + 4 != n)
2408 {
2409 al = SSL_AD_DECODE_ERROR;
2410 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2411 goto f_err;
2412 }
2413 if (s->tlsext_ocsp_resp)
2414 OPENSSL_free(s->tlsext_ocsp_resp);
2415 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2416 if (!s->tlsext_ocsp_resp)
2417 {
2418 al = SSL_AD_INTERNAL_ERROR;
2419 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2420 goto f_err;
2421 }
2422 s->tlsext_ocsp_resplen = resplen;
2423 if (s->ctx->tlsext_status_cb)
2424 {
2425 int ret;
2426 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2427 if (ret == 0)
2428 {
2429 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2430 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2431 goto f_err;
2432 }
2433 if (ret < 0)
2434 {
2435 al = SSL_AD_INTERNAL_ERROR;
2436 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2437 goto f_err;
2438 }
2439 }
2440 return 1;
2441 f_err:
2442 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2443 return(-1);
2444 }
2445 #endif
2446
2447 int ssl3_get_server_done(SSL *s)
2448 {
2449 int ok,ret=0;
2450 long n;
2451
2452 n=s->method->ssl_get_message(s,
2453 SSL3_ST_CR_SRVR_DONE_A,
2454 SSL3_ST_CR_SRVR_DONE_B,
2455 SSL3_MT_SERVER_DONE,
2456 30, /* should be very small, like 0 :-) */
2457 &ok);
2458
2459 if (!ok) return((int)n);
2460 if (n > 0)
2461 {
2462 /* should contain no data */
2463 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2464 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2465 return -1;
2466 }
2467 ret=1;
2468 return(ret);
2469 }
2470
2471
2472 int ssl3_send_client_key_exchange(SSL *s)
2473 {
2474 unsigned char *p;
2475 int n;
2476 unsigned long alg_k;
2477 #ifndef OPENSSL_NO_RSA
2478 unsigned char *q;
2479 EVP_PKEY *pkey=NULL;
2480 #endif
2481 #ifndef OPENSSL_NO_KRB5
2482 KSSL_ERR kssl_err;
2483 #endif /* OPENSSL_NO_KRB5 */
2484 #ifndef OPENSSL_NO_ECDH
2485 EC_KEY *clnt_ecdh = NULL;
2486 const EC_POINT *srvr_ecpoint = NULL;
2487 EVP_PKEY *srvr_pub_pkey = NULL;
2488 unsigned char *encodedPoint = NULL;
2489 int encoded_pt_len = 0;
2490 BN_CTX * bn_ctx = NULL;
2491 #endif
2492
2493 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2494 {
2495 p = ssl_handshake_start(s);
2496
2497 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2498
2499 /* Fool emacs indentation */
2500 if (0) {}
2501 #ifndef OPENSSL_NO_RSA
2502 else if (alg_k & SSL_kRSA)
2503 {
2504 RSA *rsa;
2505 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2506
2507 if (s->session->sess_cert == NULL)
2508 {
2509 /* We should always have a server certificate with SSL_kRSA. */
2510 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2511 goto err;
2512 }
2513
2514 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2515 rsa=s->session->sess_cert->peer_rsa_tmp;
2516 else
2517 {
2518 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2519 if ((pkey == NULL) ||
2520 (pkey->type != EVP_PKEY_RSA) ||
2521 (pkey->pkey.rsa == NULL))
2522 {
2523 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2524 goto err;
2525 }
2526 rsa=pkey->pkey.rsa;
2527 EVP_PKEY_free(pkey);
2528 }
2529
2530 tmp_buf[0]=s->client_version>>8;
2531 tmp_buf[1]=s->client_version&0xff;
2532 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2533 goto err;
2534
2535 s->session->master_key_length=sizeof tmp_buf;
2536
2537 q=p;
2538 /* Fix buf for TLS and beyond */
2539 if (s->version > SSL3_VERSION)
2540 p+=2;
2541 n=RSA_public_encrypt(sizeof tmp_buf,
2542 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2543 #ifdef PKCS1_CHECK
2544 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2545 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2546 #endif
2547 if (n <= 0)
2548 {
2549 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2550 goto err;
2551 }
2552
2553 /* Fix buf for TLS and beyond */
2554 if (s->version > SSL3_VERSION)
2555 {
2556 s2n(n,q);
2557 n+=2;
2558 }
2559
2560 s->session->master_key_length=
2561 s->method->ssl3_enc->generate_master_secret(s,
2562 s->session->master_key,
2563 tmp_buf,sizeof tmp_buf);
2564 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2565 }
2566 #endif
2567 #ifndef OPENSSL_NO_KRB5
2568 else if (alg_k & SSL_kKRB5)
2569 {
2570 krb5_error_code krb5rc;
2571 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2572 /* krb5_data krb5_ap_req; */
2573 krb5_data *enc_ticket;
2574 krb5_data authenticator, *authp = NULL;
2575 EVP_CIPHER_CTX ciph_ctx;
2576 const EVP_CIPHER *enc = NULL;
2577 unsigned char iv[EVP_MAX_IV_LENGTH];
2578 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2579 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2580 + EVP_MAX_IV_LENGTH];
2581 int padl, outl = sizeof(epms);
2582
2583 EVP_CIPHER_CTX_init(&ciph_ctx);
2584
2585 #ifdef KSSL_DEBUG
2586 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2587 alg_k, SSL_kKRB5);
2588 #endif /* KSSL_DEBUG */
2589
2590 authp = NULL;
2591 #ifdef KRB5SENDAUTH
2592 if (KRB5SENDAUTH) authp = &authenticator;
2593 #endif /* KRB5SENDAUTH */
2594
2595 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2596 &kssl_err);
2597 enc = kssl_map_enc(kssl_ctx->enctype);
2598 if (enc == NULL)
2599 goto err;
2600 #ifdef KSSL_DEBUG
2601 {
2602 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2603 if (krb5rc && kssl_err.text)
2604 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2605 }
2606 #endif /* KSSL_DEBUG */
2607
2608 if (krb5rc)
2609 {
2610 ssl3_send_alert(s,SSL3_AL_FATAL,
2611 SSL_AD_HANDSHAKE_FAILURE);
2612 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2613 kssl_err.reason);
2614 goto err;
2615 }
2616
2617 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2618 ** in place of RFC 2712 KerberosWrapper, as in:
2619 **
2620 ** Send ticket (copy to *p, set n = length)
2621 ** n = krb5_ap_req.length;
2622 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2623 ** if (krb5_ap_req.data)
2624 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2625 **
2626 ** Now using real RFC 2712 KerberosWrapper
2627 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2628 ** Note: 2712 "opaque" types are here replaced
2629 ** with a 2-byte length followed by the value.
2630 ** Example:
2631 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2632 ** Where "xx xx" = length bytes. Shown here with
2633 ** optional authenticator omitted.
2634 */
2635
2636 /* KerberosWrapper.Ticket */
2637 s2n(enc_ticket->length,p);
2638 memcpy(p, enc_ticket->data, enc_ticket->length);
2639 p+= enc_ticket->length;
2640 n = enc_ticket->length + 2;
2641
2642 /* KerberosWrapper.Authenticator */
2643 if (authp && authp->length)
2644 {
2645 s2n(authp->length,p);
2646 memcpy(p, authp->data, authp->length);
2647 p+= authp->length;
2648 n+= authp->length + 2;
2649
2650 free(authp->data);
2651 authp->data = NULL;
2652 authp->length = 0;
2653 }
2654 else
2655 {
2656 s2n(0,p);/* null authenticator length */
2657 n+=2;
2658 }
2659
2660 tmp_buf[0]=s->client_version>>8;
2661 tmp_buf[1]=s->client_version&0xff;
2662 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2663 goto err;
2664
2665 /* 20010420 VRS. Tried it this way; failed.
2666 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2667 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2668 ** kssl_ctx->length);
2669 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2670 */
2671
2672 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2673 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2674 kssl_ctx->key,iv);
2675 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2676 sizeof tmp_buf);
2677 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2678 outl += padl;
2679 if (outl > (int)sizeof epms)
2680 {
2681 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2682 goto err;
2683 }
2684 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2685
2686 /* KerberosWrapper.EncryptedPreMasterSecret */
2687 s2n(outl,p);
2688 memcpy(p, epms, outl);
2689 p+=outl;
2690 n+=outl + 2;
2691
2692 s->session->master_key_length=
2693 s->method->ssl3_enc->generate_master_secret(s,
2694 s->session->master_key,
2695 tmp_buf, sizeof tmp_buf);
2696
2697 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2698 OPENSSL_cleanse(epms, outl);
2699 }
2700 #endif
2701 #ifndef OPENSSL_NO_DH
2702 else if (alg_k & (SSL_kDHE|SSL_kDHr|SSL_kDHd))
2703 {
2704 DH *dh_srvr,*dh_clnt;
2705 SESS_CERT *scert = s->session->sess_cert;
2706
2707 if (scert == NULL)
2708 {
2709 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2710 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2711 goto err;
2712 }
2713
2714 if (scert->peer_dh_tmp != NULL)
2715 dh_srvr=scert->peer_dh_tmp;
2716 else
2717 {
2718 /* we get them from the cert */
2719 int idx = scert->peer_cert_type;
2720 EVP_PKEY *spkey = NULL;
2721 dh_srvr = NULL;
2722 if (idx >= 0)
2723 spkey = X509_get_pubkey(
2724 scert->peer_pkeys[idx].x509);
2725 if (spkey)
2726 {
2727 dh_srvr = EVP_PKEY_get1_DH(spkey);
2728 EVP_PKEY_free(spkey);
2729 }
2730 if (dh_srvr == NULL)
2731 {
2732 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2733 ERR_R_INTERNAL_ERROR);
2734 goto err;
2735 }
2736 }
2737 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2738 {
2739 /* Use client certificate key */
2740 EVP_PKEY *clkey = s->cert->key->privatekey;
2741 dh_clnt = NULL;
2742 if (clkey)
2743 dh_clnt = EVP_PKEY_get1_DH(clkey);
2744 if (dh_clnt == NULL)
2745 {
2746 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2747 ERR_R_INTERNAL_ERROR);
2748 goto err;
2749 }
2750 }
2751 else
2752 {
2753 /* generate a new random key */
2754 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2755 {
2756 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2757 goto err;
2758 }
2759 if (!DH_generate_key(dh_clnt))
2760 {
2761 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2762 DH_free(dh_clnt);
2763 goto err;
2764 }
2765 }
2766
2767 /* use the 'p' output buffer for the DH key, but
2768 * make sure to clear it out afterwards */
2769
2770 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2771 if (scert->peer_dh_tmp == NULL)
2772 DH_free(dh_srvr);
2773
2774 if (n <= 0)
2775 {
2776 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2777 DH_free(dh_clnt);
2778 goto err;
2779 }
2780
2781 /* generate master key from the result */
2782 s->session->master_key_length=
2783 s->method->ssl3_enc->generate_master_secret(s,
2784 s->session->master_key,p,n);
2785 /* clean up */
2786 memset(p,0,n);
2787
2788 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2789 n = 0;
2790 else
2791 {
2792 /* send off the data */
2793 n=BN_num_bytes(dh_clnt->pub_key);
2794 s2n(n,p);
2795 BN_bn2bin(dh_clnt->pub_key,p);
2796 n+=2;
2797 }
2798
2799 DH_free(dh_clnt);
2800
2801 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2802 }
2803 #endif
2804
2805 #ifndef OPENSSL_NO_ECDH
2806 else if (alg_k & (SSL_kECDHE|SSL_kECDHr|SSL_kECDHe))
2807 {
2808 const EC_GROUP *srvr_group = NULL;
2809 EC_KEY *tkey;
2810 int ecdh_clnt_cert = 0;
2811 int field_size = 0;
2812
2813 if (s->session->sess_cert == NULL)
2814 {
2815 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2816 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2817 goto err;
2818 }
2819
2820 /* Did we send out the client's
2821 * ECDH share for use in premaster
2822 * computation as part of client certificate?
2823 * If so, set ecdh_clnt_cert to 1.
2824 */
2825 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2826 {
2827 /* XXX: For now, we do not support client
2828 * authentication using ECDH certificates.
2829 * To add such support, one needs to add
2830 * code that checks for appropriate
2831 * conditions and sets ecdh_clnt_cert to 1.
2832 * For example, the cert have an ECC
2833 * key on the same curve as the server's
2834 * and the key should be authorized for
2835 * key agreement.
2836 *
2837 * One also needs to add code in ssl3_connect
2838 * to skip sending the certificate verify
2839 * message.
2840 *
2841 * if ((s->cert->key->privatekey != NULL) &&
2842 * (s->cert->key->privatekey->type ==
2843 * EVP_PKEY_EC) && ...)
2844 * ecdh_clnt_cert = 1;
2845 */
2846 }
2847
2848 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2849 {
2850 tkey = s->session->sess_cert->peer_ecdh_tmp;
2851 }
2852 else
2853 {
2854 /* Get the Server Public Key from Cert */
2855 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2856 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2857 if ((srvr_pub_pkey == NULL) ||
2858 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2859 (srvr_pub_pkey->pkey.ec == NULL))
2860 {
2861 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2862 ERR_R_INTERNAL_ERROR);
2863 goto err;
2864 }
2865
2866 tkey = srvr_pub_pkey->pkey.ec;
2867 }
2868
2869 srvr_group = EC_KEY_get0_group(tkey);
2870 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2871
2872 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2873 {
2874 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2875 ERR_R_INTERNAL_ERROR);
2876 goto err;
2877 }
2878
2879 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2880 {
2881 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2882 goto err;
2883 }
2884
2885 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2886 {
2887 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2888 goto err;
2889 }
2890 if (ecdh_clnt_cert)
2891 {
2892 /* Reuse key info from our certificate
2893 * We only need our private key to perform
2894 * the ECDH computation.
2895 */
2896 const BIGNUM *priv_key;
2897 tkey = s->cert->key->privatekey->pkey.ec;
2898 priv_key = EC_KEY_get0_private_key(tkey);
2899 if (priv_key == NULL)
2900 {
2901 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2902 goto err;
2903 }
2904 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2905 {
2906 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2907 goto err;
2908 }
2909 }
2910 else
2911 {
2912 /* Generate a new ECDH key pair */
2913 if (!(EC_KEY_generate_key(clnt_ecdh)))
2914 {
2915 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2916 goto err;
2917 }
2918 }
2919
2920 /* use the 'p' output buffer for the ECDH key, but
2921 * make sure to clear it out afterwards
2922 */
2923
2924 field_size = EC_GROUP_get_degree(srvr_group);
2925 if (field_size <= 0)
2926 {
2927 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2928 ERR_R_ECDH_LIB);
2929 goto err;
2930 }
2931 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2932 if (n <= 0)
2933 {
2934 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2935 ERR_R_ECDH_LIB);
2936 goto err;
2937 }
2938
2939 /* generate master key from the result */
2940 s->session->master_key_length = s->method->ssl3_enc \
2941 -> generate_master_secret(s,
2942 s->session->master_key,
2943 p, n);
2944
2945 memset(p, 0, n); /* clean up */
2946
2947 if (ecdh_clnt_cert)
2948 {
2949 /* Send empty client key exch message */
2950 n = 0;
2951 }
2952 else
2953 {
2954 /* First check the size of encoding and
2955 * allocate memory accordingly.
2956 */
2957 encoded_pt_len =
2958 EC_POINT_point2oct(srvr_group,
2959 EC_KEY_get0_public_key(clnt_ecdh),
2960 POINT_CONVERSION_UNCOMPRESSED,
2961 NULL, 0, NULL);
2962
2963 encodedPoint = (unsigned char *)
2964 OPENSSL_malloc(encoded_pt_len *
2965 sizeof(unsigned char));
2966 bn_ctx = BN_CTX_new();
2967 if ((encodedPoint == NULL) ||
2968 (bn_ctx == NULL))
2969 {
2970 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2971 goto err;
2972 }
2973
2974 /* Encode the public key */
2975 n = EC_POINT_point2oct(srvr_group,
2976 EC_KEY_get0_public_key(clnt_ecdh),
2977 POINT_CONVERSION_UNCOMPRESSED,
2978 encodedPoint, encoded_pt_len, bn_ctx);
2979
2980 *p = n; /* length of encoded point */
2981 /* Encoded point will be copied here */
2982 p += 1;
2983 /* copy the point */
2984 memcpy((unsigned char *)p, encodedPoint, n);
2985 /* increment n to account for length field */
2986 n += 1;
2987 }
2988
2989 /* Free allocated memory */
2990 BN_CTX_free(bn_ctx);
2991 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2992 if (clnt_ecdh != NULL)
2993 EC_KEY_free(clnt_ecdh);
2994 EVP_PKEY_free(srvr_pub_pkey);
2995 }
2996 #endif /* !OPENSSL_NO_ECDH */
2997 else if (alg_k & SSL_kGOST)
2998 {
2999 /* GOST key exchange message creation */
3000 EVP_PKEY_CTX *pkey_ctx;
3001 X509 *peer_cert;
3002 size_t msglen;
3003 unsigned int md_len;
3004 int keytype;
3005 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
3006 EVP_MD_CTX *ukm_hash;
3007 EVP_PKEY *pub_key;
3008
3009 /* Get server sertificate PKEY and create ctx from it */
3010 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
3011 if (!peer_cert)
3012 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
3013 if (!peer_cert) {
3014 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
3015 goto err;
3016 }
3017
3018 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
3019 /* If we have send a certificate, and certificate key
3020
3021 * parameters match those of server certificate, use
3022 * certificate key for key exchange
3023 */
3024
3025 /* Otherwise, generate ephemeral key pair */
3026
3027 EVP_PKEY_encrypt_init(pkey_ctx);
3028 /* Generate session key */
3029 RAND_bytes(premaster_secret,32);
3030 /* If we have client certificate, use its secret as peer key */
3031 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
3032 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
3033 /* If there was an error - just ignore it. Ephemeral key
3034 * would be used
3035 */
3036 ERR_clear_error();
3037 }
3038 }
3039 /* Compute shared IV and store it in algorithm-specific
3040 * context data */
3041 ukm_hash = EVP_MD_CTX_create();
3042 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
3043 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
3044 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
3045 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
3046 EVP_MD_CTX_destroy(ukm_hash);
3047 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
3048 8,shared_ukm)<0) {
3049 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3050 SSL_R_LIBRARY_BUG);
3051 goto err;
3052 }
3053 /* Make GOST keytransport blob message */
3054 /*Encapsulate it into sequence */
3055 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
3056 msglen=255;
3057 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
3058 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3059 SSL_R_LIBRARY_BUG);
3060 goto err;
3061 }
3062 if (msglen >= 0x80)
3063 {
3064 *(p++)=0x81;
3065 *(p++)= msglen & 0xff;
3066 n=msglen+3;
3067 }
3068 else
3069 {
3070 *(p++)= msglen & 0xff;
3071 n=msglen+2;
3072 }
3073 memcpy(p, tmp, msglen);
3074 /* Check if pubkey from client certificate was used */
3075 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
3076 {
3077 /* Set flag "skip certificate verify" */
3078 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3079 }
3080 EVP_PKEY_CTX_free(pkey_ctx);
3081 s->session->master_key_length=
3082 s->method->ssl3_enc->generate_master_secret(s,
3083 s->session->master_key,premaster_secret,32);
3084 EVP_PKEY_free(pub_key);
3085
3086 }
3087 #ifndef OPENSSL_NO_SRP
3088 else if (alg_k & SSL_kSRP)
3089 {
3090 if (s->srp_ctx.A != NULL)
3091 {
3092 /* send off the data */
3093 n=BN_num_bytes(s->srp_ctx.A);
3094 s2n(n,p);
3095 BN_bn2bin(s->srp_ctx.A,p);
3096 n+=2;
3097 }
3098 else
3099 {
3100 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
3101 goto err;
3102 }
3103 if (s->session->srp_username != NULL)
3104 OPENSSL_free(s->session->srp_username);
3105 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
3106 if (s->session->srp_username == NULL)
3107 {
3108 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3109 ERR_R_MALLOC_FAILURE);
3110 goto err;
3111 }
3112
3113 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
3114 {
3115 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
3116 goto err;
3117 }
3118 }
3119 #endif
3120 #ifndef OPENSSL_NO_PSK
3121 else if (alg_k & SSL_kPSK)
3122 {
3123 /* The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes
3124 * to return a \0-terminated identity. The last byte
3125 * is for us for simulating strnlen. */
3126 char identity[PSK_MAX_IDENTITY_LEN + 2];
3127 size_t identity_len;
3128 unsigned char *t = NULL;
3129 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
3130 unsigned int pre_ms_len = 0, psk_len = 0;
3131 int psk_err = 1;
3132
3133 n = 0;
3134 if (s->psk_client_callback == NULL)
3135 {
3136 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3137 SSL_R_PSK_NO_CLIENT_CB);
3138 goto err;
3139 }
3140
3141 memset(identity, 0, sizeof(identity));
3142 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
3143 identity, sizeof(identity) - 1,
3144 psk_or_pre_ms, sizeof(psk_or_pre_ms));
3145 if (psk_len > PSK_MAX_PSK_LEN)
3146 {
3147 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3148 ERR_R_INTERNAL_ERROR);
3149 goto psk_err;
3150 }
3151 else if (psk_len == 0)
3152 {
3153 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3154 SSL_R_PSK_IDENTITY_NOT_FOUND);
3155 goto psk_err;
3156 }
3157 identity[PSK_MAX_IDENTITY_LEN + 1] = '\0';
3158 identity_len = strlen(identity);
3159 if (identity_len > PSK_MAX_IDENTITY_LEN)
3160 {
3161 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3162 ERR_R_INTERNAL_ERROR);
3163 goto psk_err;
3164 }
3165 /* create PSK pre_master_secret */
3166 pre_ms_len = 2+psk_len+2+psk_len;
3167 t = psk_or_pre_ms;
3168 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
3169 s2n(psk_len, t);
3170 memset(t, 0, psk_len);
3171 t+=psk_len;
3172 s2n(psk_len, t);
3173
3174 if (s->session->psk_identity_hint != NULL)
3175 OPENSSL_free(s->session->psk_identity_hint);
3176 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
3177 if (s->ctx->psk_identity_hint != NULL &&
3178 s->session->psk_identity_hint == NULL)
3179 {
3180 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3181 ERR_R_MALLOC_FAILURE);
3182 goto psk_err;
3183 }
3184
3185 if (s->session->psk_identity != NULL)
3186 OPENSSL_free(s->session->psk_identity);
3187 s->session->psk_identity = BUF_strdup(identity);
3188 if (s->session->psk_identity == NULL)
3189 {
3190 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3191 ERR_R_MALLOC_FAILURE);
3192 goto psk_err;
3193 }
3194
3195 s->session->master_key_length =
3196 s->method->ssl3_enc->generate_master_secret(s,
3197 s->session->master_key,
3198 psk_or_pre_ms, pre_ms_len);
3199 s2n(identity_len, p);
3200 memcpy(p, identity, identity_len);
3201 n = 2 + identity_len;
3202 psk_err = 0;
3203 psk_err:
3204 OPENSSL_cleanse(identity, sizeof(identity));
3205 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
3206 if (psk_err != 0)
3207 {
3208 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
3209 goto err;
3210 }
3211 }
3212 #endif
3213 else
3214 {
3215 ssl3_send_alert(s, SSL3_AL_FATAL,
3216 SSL_AD_HANDSHAKE_FAILURE);
3217 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3218 ERR_R_INTERNAL_ERROR);
3219 goto err;
3220 }
3221
3222 ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n);
3223 s->state=SSL3_ST_CW_KEY_EXCH_B;
3224 }
3225
3226 /* SSL3_ST_CW_KEY_EXCH_B */
3227 return ssl_do_write(s);
3228 err:
3229 #ifndef OPENSSL_NO_ECDH
3230 BN_CTX_free(bn_ctx);
3231 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
3232 if (clnt_ecdh != NULL)
3233 EC_KEY_free(clnt_ecdh);
3234 EVP_PKEY_free(srvr_pub_pkey);
3235 #endif
3236 return(-1);
3237 }
3238
3239 int ssl3_send_client_verify(SSL *s)
3240 {
3241 unsigned char *p;
3242 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
3243 EVP_PKEY *pkey;
3244 EVP_PKEY_CTX *pctx=NULL;
3245 EVP_MD_CTX mctx;
3246 unsigned u=0;
3247 unsigned long n;
3248 int j;
3249
3250 EVP_MD_CTX_init(&mctx);
3251
3252 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
3253 {
3254 p= ssl_handshake_start(s);
3255 pkey=s->cert->key->privatekey;
3256 /* Create context from key and test if sha1 is allowed as digest */
3257 pctx = EVP_PKEY_CTX_new(pkey,NULL);
3258 EVP_PKEY_sign_init(pctx);
3259 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
3260 {
3261 if (!SSL_USE_SIGALGS(s))
3262 s->method->ssl3_enc->cert_verify_mac(s,
3263 NID_sha1,
3264 &(data[MD5_DIGEST_LENGTH]));
3265 }
3266 else
3267 {
3268 ERR_clear_error();
3269 }
3270 /* For TLS v1.2 send signature algorithm and signature
3271 * using agreed digest and cached handshake records.
3272 */
3273 if (SSL_USE_SIGALGS(s))
3274 {
3275 long hdatalen = 0;
3276 void *hdata;
3277 const EVP_MD *md = s->cert->key->digest;
3278 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
3279 &hdata);
3280 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
3281 {
3282 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3283 ERR_R_INTERNAL_ERROR);
3284 goto err;
3285 }
3286 p += 2;
3287 #ifdef SSL_DEBUG
3288 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
3289 EVP_MD_name(md));
3290 #endif
3291 if (!EVP_SignInit_ex(&mctx, md, NULL)
3292 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3293 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
3294 {
3295 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3296 ERR_R_EVP_LIB);
3297 goto err;
3298 }
3299 s2n(u,p);
3300 n = u + 4;
3301 if (!ssl3_digest_cached_records(s))
3302 goto err;
3303 }
3304 else
3305 #ifndef OPENSSL_NO_RSA
3306 if (pkey->type == EVP_PKEY_RSA)
3307 {
3308 s->method->ssl3_enc->cert_verify_mac(s,
3309 NID_md5,
3310 &(data[0]));
3311 if (RSA_sign(NID_md5_sha1, data,
3312 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3313 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3314 {
3315 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3316 goto err;
3317 }
3318 s2n(u,p);
3319 n=u+2;
3320 }
3321 else
3322 #endif
3323 #ifndef OPENSSL_NO_DSA
3324 if (pkey->type == EVP_PKEY_DSA)
3325 {
3326 if (!DSA_sign(pkey->save_type,
3327 &(data[MD5_DIGEST_LENGTH]),
3328 SHA_DIGEST_LENGTH,&(p[2]),
3329 (unsigned int *)&j,pkey->pkey.dsa))
3330 {
3331 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3332 goto err;
3333 }
3334 s2n(j,p);
3335 n=j+2;
3336 }
3337 else
3338 #endif
3339 #ifndef OPENSSL_NO_ECDSA
3340 if (pkey->type == EVP_PKEY_EC)
3341 {
3342 if (!ECDSA_sign(pkey->save_type,
3343 &(data[MD5_DIGEST_LENGTH]),
3344 SHA_DIGEST_LENGTH,&(p[2]),
3345 (unsigned int *)&j,pkey->pkey.ec))
3346 {
3347 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3348 ERR_R_ECDSA_LIB);
3349 goto err;
3350 }
3351 s2n(j,p);
3352 n=j+2;
3353 }
3354 else
3355 #endif
3356 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3357 {
3358 unsigned char signbuf[64];
3359 int i;
3360 size_t sigsize=64;
3361 s->method->ssl3_enc->cert_verify_mac(s,
3362 NID_id_GostR3411_94,
3363 data);
3364 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3365 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3366 ERR_R_INTERNAL_ERROR);
3367 goto err;
3368 }
3369 for (i=63,j=0; i>=0; j++, i--) {
3370 p[2+j]=signbuf[i];
3371 }
3372 s2n(j,p);
3373 n=j+2;
3374 }
3375 else
3376 {
3377 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3378 goto err;
3379 }
3380 ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n);
3381 s->state=SSL3_ST_CW_CERT_VRFY_B;
3382 }
3383 EVP_MD_CTX_cleanup(&mctx);
3384 EVP_PKEY_CTX_free(pctx);
3385 return ssl_do_write(s);
3386 err:
3387 EVP_MD_CTX_cleanup(&mctx);
3388 EVP_PKEY_CTX_free(pctx);
3389 return(-1);
3390 }
3391
3392 /* Check a certificate can be used for client authentication. Currently
3393 * check cert exists, if we have a suitable digest for TLS 1.2 if
3394 * static DH client certificates can be used and optionally checks
3395 * suitability for Suite B.
3396 */
3397 static int ssl3_check_client_certificate(SSL *s)
3398 {
3399 unsigned long alg_k;
3400 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
3401 return 0;
3402 /* If no suitable signature algorithm can't use certificate */
3403 if (SSL_USE_SIGALGS(s) && !s->cert->key->digest)
3404 return 0;
3405 /* If strict mode check suitability of chain before using it.
3406 * This also adjusts suite B digest if necessary.
3407 */
3408 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
3409 !tls1_check_chain(s, NULL, NULL, NULL, -2))
3410 return 0;
3411 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3412 /* See if we can use client certificate for fixed DH */
3413 if (alg_k & (SSL_kDHr|SSL_kDHd))
3414 {
3415 SESS_CERT *scert = s->session->sess_cert;
3416 int i = scert->peer_cert_type;
3417 EVP_PKEY *clkey = NULL, *spkey = NULL;
3418 clkey = s->cert->key->privatekey;
3419 /* If client key not DH assume it can be used */
3420 if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
3421 return 1;
3422 if (i >= 0)
3423 spkey = X509_get_pubkey(scert->peer_pkeys[i].x509);
3424 if (spkey)
3425 {
3426 /* Compare server and client parameters */
3427 i = EVP_PKEY_cmp_parameters(clkey, spkey);
3428 EVP_PKEY_free(spkey);
3429 if (i != 1)
3430 return 0;
3431 }
3432 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3433 }
3434 return 1;
3435 }
3436
3437 int ssl3_send_client_certificate(SSL *s)
3438 {
3439 X509 *x509=NULL;
3440 EVP_PKEY *pkey=NULL;
3441 int i;
3442
3443 if (s->state == SSL3_ST_CW_CERT_A)
3444 {
3445 /* Let cert callback update client certificates if required */
3446 if (s->cert->cert_cb)
3447 {
3448 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
3449 if (i < 0)
3450 {
3451 s->rwstate=SSL_X509_LOOKUP;
3452 return -1;
3453 }
3454 if (i == 0)
3455 {
3456 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3457 return 0;
3458 }
3459 s->rwstate=SSL_NOTHING;
3460 }
3461 if (ssl3_check_client_certificate(s))
3462 s->state=SSL3_ST_CW_CERT_C;
3463 else
3464 s->state=SSL3_ST_CW_CERT_B;
3465 }
3466
3467 /* We need to get a client cert */
3468 if (s->state == SSL3_ST_CW_CERT_B)
3469 {
3470 /* If we get an error, we need to
3471 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3472 * We then get retied later */
3473 i=0;
3474 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3475 if (i < 0)
3476 {
3477 s->rwstate=SSL_X509_LOOKUP;
3478 return(-1);
3479 }
3480 s->rwstate=SSL_NOTHING;
3481 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3482 {
3483 s->state=SSL3_ST_CW_CERT_B;
3484 if ( !SSL_use_certificate(s,x509) ||
3485 !SSL_use_PrivateKey(s,pkey))
3486 i=0;
3487 }
3488 else if (i == 1)
3489 {
3490 i=0;
3491 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3492 }
3493
3494 if (x509 != NULL) X509_free(x509);
3495 if (pkey != NULL) EVP_PKEY_free(pkey);
3496 if (i && !ssl3_check_client_certificate(s))
3497 i = 0;
3498 if (i == 0)
3499 {
3500 if (s->version == SSL3_VERSION)
3501 {
3502 s->s3->tmp.cert_req=0;
3503 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3504 return(1);
3505 }
3506 else
3507 {
3508 s->s3->tmp.cert_req=2;
3509 }
3510 }
3511
3512 /* Ok, we have a cert */
3513 s->state=SSL3_ST_CW_CERT_C;
3514 }
3515
3516 if (s->state == SSL3_ST_CW_CERT_C)
3517 {
3518 s->state=SSL3_ST_CW_CERT_D;
3519 if (!ssl3_output_cert_chain(s,
3520 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key))
3521 {
3522 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
3523 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3524 return 0;
3525 }
3526 }
3527 /* SSL3_ST_CW_CERT_D */
3528 return ssl_do_write(s);
3529 }
3530
3531 #define has_bits(i,m) (((i)&(m)) == (m))
3532
3533 int ssl3_check_cert_and_algorithm(SSL *s)
3534 {
3535 int i,idx;
3536 long alg_k,alg_a;
3537 EVP_PKEY *pkey=NULL;
3538 SESS_CERT *sc;
3539 #ifndef OPENSSL_NO_RSA
3540 RSA *rsa;
3541 #endif
3542 #ifndef OPENSSL_NO_DH
3543 DH *dh;
3544 #endif
3545
3546 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3547 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3548
3549 /* we don't have a certificate */
3550 if ((alg_a & (SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3551 return(1);
3552
3553 sc=s->session->sess_cert;
3554 if (sc == NULL)
3555 {
3556 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3557 goto err;
3558 }
3559
3560 #ifndef OPENSSL_NO_RSA
3561 rsa=s->session->sess_cert->peer_rsa_tmp;
3562 #endif
3563 #ifndef OPENSSL_NO_DH
3564 dh=s->session->sess_cert->peer_dh_tmp;
3565 #endif
3566
3567 /* This is the passed certificate */
3568
3569 idx=sc->peer_cert_type;
3570 #ifndef OPENSSL_NO_ECDH
3571 if (idx == SSL_PKEY_ECC)
3572 {
3573 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3574 s) == 0)
3575 { /* check failed */
3576 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3577 goto f_err;
3578 }
3579 else
3580 {
3581 return 1;
3582 }
3583 }
3584 else if (alg_a & SSL_aECDSA)
3585 {
3586 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDSA_SIGNING_CERT);
3587 goto f_err;
3588 }
3589 else if (alg_k & (SSL_kECDHr|SSL_kECDHe))
3590 {
3591 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDH_CERT);
3592 goto f_err;
3593 }
3594 #endif
3595 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3596 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3597 EVP_PKEY_free(pkey);
3598
3599
3600 /* Check that we have a certificate if we require one */
3601 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3602 {
3603 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3604 goto f_err;
3605 }
3606 #ifndef OPENSSL_NO_DSA
3607 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3608 {
3609 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3610 goto f_err;
3611 }
3612 #endif
3613 #ifndef OPENSSL_NO_RSA
3614 if ((alg_k & SSL_kRSA) &&
3615 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3616 {
3617 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3618 goto f_err;
3619 }
3620 #endif
3621 #ifndef OPENSSL_NO_DH
3622 if ((alg_k & SSL_kDHE) &&
3623 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3624 {
3625 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3626 goto f_err;
3627 }
3628 else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) &&
3629 !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3630 {
3631 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3632 goto f_err;
3633 }
3634 #ifndef OPENSSL_NO_DSA
3635 else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) &&
3636 !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3637 {
3638 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3639 goto f_err;
3640 }
3641 #endif
3642 #endif
3643
3644 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3645 {
3646 #ifndef OPENSSL_NO_RSA
3647 if (alg_k & SSL_kRSA)
3648 {
3649 if (rsa == NULL
3650 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3651 {
3652 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3653 goto f_err;
3654 }
3655 }
3656 else
3657 #endif
3658 #ifndef OPENSSL_NO_DH
3659 if (alg_k & (SSL_kDHE|SSL_kDHr|SSL_kDHd))
3660 {
3661 if (dh == NULL
3662 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3663 {
3664 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3665 goto f_err;
3666 }
3667 }
3668 else
3669 #endif
3670 {
3671 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3672 goto f_err;
3673 }
3674 }
3675 return(1);
3676 f_err:
3677 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3678 err:
3679 return(0);
3680 }
3681
3682 /* Check to see if handshake is full or resumed. Usually this is just a
3683 * case of checking to see if a cache hit has occurred. In the case of
3684 * session tickets we have to check the next message to be sure.
3685 */
3686
3687 #ifndef OPENSSL_NO_TLSEXT
3688 # ifndef OPENSSL_NO_NEXTPROTONEG
3689 int ssl3_send_next_proto(SSL *s)
3690 {
3691 unsigned int len, padding_len;
3692 unsigned char *d;
3693
3694 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3695 {
3696 len = s->next_proto_negotiated_len;
3697 padding_len = 32 - ((len + 2) % 32);
3698 d = (unsigned char *)s->init_buf->data;
3699 d[4] = len;
3700 memcpy(d + 5, s->next_proto_negotiated, len);
3701 d[5 + len] = padding_len;
3702 memset(d + 6 + len, 0, padding_len);
3703 *(d++)=SSL3_MT_NEXT_PROTO;
3704 l2n3(2 + len + padding_len, d);
3705 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3706 s->init_num = 4 + 2 + len + padding_len;
3707 s->init_off = 0;
3708 }
3709
3710 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3711 }
3712 # endif
3713
3714 int ssl3_check_finished(SSL *s)
3715 {
3716 int ok;
3717 long n;
3718
3719 /* If we have no ticket it cannot be a resumed session. */
3720 if (!s->session->tlsext_tick)
3721 return 1;
3722 /* this function is called when we really expect a Certificate
3723 * message, so permit appropriate message length */
3724 n=s->method->ssl_get_message(s,
3725 SSL3_ST_CR_CERT_A,
3726 SSL3_ST_CR_CERT_B,
3727 -1,
3728 s->max_cert_list,
3729 &ok);
3730 if (!ok) return((int)n);
3731 s->s3->tmp.reuse_message = 1;
3732
3733 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3734 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3735 return 2;
3736
3737 return 1;
3738 }
3739 #endif
3740
3741 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3742 {
3743 int i = 0;
3744 #ifndef OPENSSL_NO_ENGINE
3745 if (s->ctx->client_cert_engine)
3746 {
3747 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3748 SSL_get_client_CA_list(s),
3749 px509, ppkey, NULL, NULL, NULL);
3750 if (i != 0)
3751 return i;
3752 }
3753 #endif
3754 if (s->ctx->client_cert_cb)
3755 i = s->ctx->client_cert_cb(s,px509,ppkey);
3756 return i;
3757 }
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