1 /* ssl/s3_clnt.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58 /* ====================================================================
59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 *
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
71 * distribution.
72 *
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 *
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
82 *
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 * acknowledgment:
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
105 *
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
109 *
110 */
111 /* ====================================================================
112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113 *
114 * Portions of the attached software ("Contribution") are developed by
115 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
116 *
117 * The Contribution is licensed pursuant to the OpenSSL open source
118 * license provided above.
119 *
120 * ECC cipher suite support in OpenSSL originally written by
121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
122 *
123 */
124 /* ====================================================================
125 * Copyright 2005 Nokia. All rights reserved.
126 *
127 * The portions of the attached software ("Contribution") is developed by
128 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
129 * license.
130 *
131 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
132 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
133 * support (see RFC 4279) to OpenSSL.
134 *
135 * No patent licenses or other rights except those expressly stated in
136 * the OpenSSL open source license shall be deemed granted or received
137 * expressly, by implication, estoppel, or otherwise.
138 *
139 * No assurances are provided by Nokia that the Contribution does not
140 * infringe the patent or other intellectual property rights of any third
141 * party or that the license provides you with all the necessary rights
142 * to make use of the Contribution.
143 *
144 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
145 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
146 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
147 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
148 * OTHERWISE.
149 */
150
151 #include <stdio.h>
152 #include "ssl_locl.h"
153 #include "kssl_lcl.h"
154 #include <openssl/buffer.h>
155 #include <openssl/rand.h>
156 #include <openssl/objects.h>
157 #include <openssl/evp.h>
158 #include <openssl/md5.h>
159 #ifdef OPENSSL_FIPS
160 #include <openssl/fips.h>
161 #endif
162 #ifndef OPENSSL_NO_DH
163 #include <openssl/dh.h>
164 #endif
165 #include <openssl/bn.h>
166 #ifndef OPENSSL_NO_ENGINE
167 #include <openssl/engine.h>
168 #endif
169
170 static const SSL_METHOD *ssl3_get_client_method(int ver);
171 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
172
173 static const SSL_METHOD *ssl3_get_client_method(int ver)
174 {
175 if (ver == SSL3_VERSION)
176 return(SSLv3_client_method());
177 else
178 return(NULL);
179 }
180
181 IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
182 ssl_undefined_function,
183 ssl3_connect,
184 ssl3_get_client_method)
185
186 int ssl3_connect(SSL *s)
187 {
188 BUF_MEM *buf=NULL;
189 unsigned long Time=(unsigned long)time(NULL);
190 void (*cb)(const SSL *ssl,int type,int val)=NULL;
191 int ret= -1;
192 int new_state,state,skip=0;
193
194 RAND_add(&Time,sizeof(Time),0);
195 ERR_clear_error();
196 clear_sys_error();
197
198 if (s->info_callback != NULL)
199 cb=s->info_callback;
200 else if (s->ctx->info_callback != NULL)
201 cb=s->ctx->info_callback;
202
203 s->in_handshake++;
204 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
205
206 #ifndef OPENSSL_NO_HEARTBEATS
207 /* If we're awaiting a HeartbeatResponse, pretend we
208 * already got and don't await it anymore, because
209 * Heartbeats don't make sense during handshakes anyway.
210 */
211 if (s->tlsext_hb_pending)
212 {
213 s->tlsext_hb_pending = 0;
214 s->tlsext_hb_seq++;
215 }
216 #endif
217
218 for (;;)
219 {
220 state=s->state;
221
222 switch(s->state)
223 {
224 case SSL_ST_RENEGOTIATE:
225 s->renegotiate=1;
226 s->state=SSL_ST_CONNECT;
227 s->ctx->stats.sess_connect_renegotiate++;
228 /* break */
229 case SSL_ST_BEFORE:
230 case SSL_ST_CONNECT:
231 case SSL_ST_BEFORE|SSL_ST_CONNECT:
232 case SSL_ST_OK|SSL_ST_CONNECT:
233
234 s->server=0;
235 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
236
237 if ((s->version & 0xff00 ) != 0x0300)
238 {
239 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
240 ret = -1;
241 goto end;
242 }
243
244 /* s->version=SSL3_VERSION; */
245 s->type=SSL_ST_CONNECT;
246
247 if (s->init_buf == NULL)
248 {
249 if ((buf=BUF_MEM_new()) == NULL)
250 {
251 ret= -1;
252 goto end;
253 }
254 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
255 {
256 ret= -1;
257 goto end;
258 }
259 s->init_buf=buf;
260 buf=NULL;
261 }
262
263 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
264
265 /* setup buffing BIO */
266 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
267
268 /* don't push the buffering BIO quite yet */
269
270 ssl3_init_finished_mac(s);
271
272 s->state=SSL3_ST_CW_CLNT_HELLO_A;
273 s->ctx->stats.sess_connect++;
274 s->init_num=0;
275 break;
276
277 case SSL3_ST_CW_CLNT_HELLO_A:
278 case SSL3_ST_CW_CLNT_HELLO_B:
279
280 s->shutdown=0;
281 ret=ssl3_client_hello(s);
282 if (ret <= 0) goto end;
283 s->state=SSL3_ST_CR_SRVR_HELLO_A;
284 s->init_num=0;
285
286 /* turn on buffering for the next lot of output */
287 if (s->bbio != s->wbio)
288 s->wbio=BIO_push(s->bbio,s->wbio);
289
290 break;
291
292 case SSL3_ST_CR_SRVR_HELLO_A:
293 case SSL3_ST_CR_SRVR_HELLO_B:
294 ret=ssl3_get_server_hello(s);
295 if (ret <= 0) goto end;
296
297 if (s->hit)
298 {
299 s->state=SSL3_ST_CR_FINISHED_A;
300 #ifndef OPENSSL_NO_TLSEXT
301 if (s->tlsext_ticket_expected)
302 {
303 /* receive renewed session ticket */
304 s->state=SSL3_ST_CR_SESSION_TICKET_A;
305 }
306 #endif
307 }
308 else
309 s->state=SSL3_ST_CR_CERT_A;
310 s->init_num=0;
311 break;
312
313 case SSL3_ST_CR_CERT_A:
314 case SSL3_ST_CR_CERT_B:
315 #ifndef OPENSSL_NO_TLSEXT
316 ret=ssl3_check_finished(s);
317 if (ret <= 0) goto end;
318 if (ret == 2)
319 {
320 s->hit = 1;
321 if (s->tlsext_ticket_expected)
322 s->state=SSL3_ST_CR_SESSION_TICKET_A;
323 else
324 s->state=SSL3_ST_CR_FINISHED_A;
325 s->init_num=0;
326 break;
327 }
328 #endif
329 /* Check if it is anon DH/ECDH */
330 /* or PSK */
331 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
332 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
333 {
334 ret=ssl3_get_server_certificate(s);
335 if (ret <= 0) goto end;
336 #ifndef OPENSSL_NO_TLSEXT
337 if (s->tlsext_status_expected)
338 s->state=SSL3_ST_CR_CERT_STATUS_A;
339 else
340 s->state=SSL3_ST_CR_KEY_EXCH_A;
341 }
342 else
343 {
344 skip = 1;
345 s->state=SSL3_ST_CR_KEY_EXCH_A;
346 }
347 #else
348 }
349 else
350 skip=1;
351
352 s->state=SSL3_ST_CR_KEY_EXCH_A;
353 #endif
354 s->init_num=0;
355 break;
356
357 case SSL3_ST_CR_KEY_EXCH_A:
358 case SSL3_ST_CR_KEY_EXCH_B:
359 ret=ssl3_get_key_exchange(s);
360 if (ret <= 0) goto end;
361 s->state=SSL3_ST_CR_CERT_REQ_A;
362 s->init_num=0;
363
364 /* at this point we check that we have the
365 * required stuff from the server */
366 if (!ssl3_check_cert_and_algorithm(s))
367 {
368 ret= -1;
369 goto end;
370 }
371 break;
372
373 case SSL3_ST_CR_CERT_REQ_A:
374 case SSL3_ST_CR_CERT_REQ_B:
375 ret=ssl3_get_certificate_request(s);
376 if (ret <= 0) goto end;
377 s->state=SSL3_ST_CR_SRVR_DONE_A;
378 s->init_num=0;
379 break;
380
381 case SSL3_ST_CR_SRVR_DONE_A:
382 case SSL3_ST_CR_SRVR_DONE_B:
383 ret=ssl3_get_server_done(s);
384 if (ret <= 0) goto end;
385 #ifndef OPENSSL_NO_SRP
386 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP)
387 {
388 if ((ret = SRP_Calc_A_param(s))<=0)
389 {
390 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
391 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
392 goto end;
393 }
394 }
395 #endif
396 if (s->s3->tmp.cert_req)
397 s->state=SSL3_ST_CW_CERT_A;
398 else
399 s->state=SSL3_ST_CW_KEY_EXCH_A;
400 s->init_num=0;
401
402 break;
403
404 case SSL3_ST_CW_CERT_A:
405 case SSL3_ST_CW_CERT_B:
406 case SSL3_ST_CW_CERT_C:
407 case SSL3_ST_CW_CERT_D:
408 ret=ssl3_send_client_certificate(s);
409 if (ret <= 0) goto end;
410 s->state=SSL3_ST_CW_KEY_EXCH_A;
411 s->init_num=0;
412 break;
413
414 case SSL3_ST_CW_KEY_EXCH_A:
415 case SSL3_ST_CW_KEY_EXCH_B:
416 ret=ssl3_send_client_key_exchange(s);
417 if (ret <= 0) goto end;
418 /* EAY EAY EAY need to check for DH fix cert
419 * sent back */
420 /* For TLS, cert_req is set to 2, so a cert chain
421 * of nothing is sent, but no verify packet is sent */
422 /* XXX: For now, we do not support client
423 * authentication in ECDH cipher suites with
424 * ECDH (rather than ECDSA) certificates.
425 * We need to skip the certificate verify
426 * message when client's ECDH public key is sent
427 * inside the client certificate.
428 */
429 if (s->s3->tmp.cert_req == 1)
430 {
431 s->state=SSL3_ST_CW_CERT_VRFY_A;
432 }
433 else
434 {
435 s->state=SSL3_ST_CW_CHANGE_A;
436 s->s3->change_cipher_spec=0;
437 }
438 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
439 {
440 s->state=SSL3_ST_CW_CHANGE_A;
441 s->s3->change_cipher_spec=0;
442 }
443
444 s->init_num=0;
445 break;
446
447 case SSL3_ST_CW_CERT_VRFY_A:
448 case SSL3_ST_CW_CERT_VRFY_B:
449 ret=ssl3_send_client_verify(s);
450 if (ret <= 0) goto end;
451 s->state=SSL3_ST_CW_CHANGE_A;
452 s->init_num=0;
453 s->s3->change_cipher_spec=0;
454 break;
455
456 case SSL3_ST_CW_CHANGE_A:
457 case SSL3_ST_CW_CHANGE_B:
458 ret=ssl3_send_change_cipher_spec(s,
459 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
460 if (ret <= 0) goto end;
461
462 #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
463 s->state=SSL3_ST_CW_FINISHED_A;
464 #else
465 if (s->s3->next_proto_neg_seen)
466 s->state=SSL3_ST_CW_NEXT_PROTO_A;
467 else
468 s->state=SSL3_ST_CW_FINISHED_A;
469 #endif
470 s->init_num=0;
471
472 s->session->cipher=s->s3->tmp.new_cipher;
473 #ifdef OPENSSL_NO_COMP
474 s->session->compress_meth=0;
475 #else
476 if (s->s3->tmp.new_compression == NULL)
477 s->session->compress_meth=0;
478 else
479 s->session->compress_meth=
480 s->s3->tmp.new_compression->id;
481 #endif
482 if (!s->method->ssl3_enc->setup_key_block(s))
483 {
484 ret= -1;
485 goto end;
486 }
487
488 if (!s->method->ssl3_enc->change_cipher_state(s,
489 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
490 {
491 ret= -1;
492 goto end;
493 }
494
495 break;
496
497 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
498 case SSL3_ST_CW_NEXT_PROTO_A:
499 case SSL3_ST_CW_NEXT_PROTO_B:
500 ret=ssl3_send_next_proto(s);
501 if (ret <= 0) goto end;
502 s->state=SSL3_ST_CW_FINISHED_A;
503 break;
504 #endif
505
506 case SSL3_ST_CW_FINISHED_A:
507 case SSL3_ST_CW_FINISHED_B:
508 ret=ssl3_send_finished(s,
509 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
510 s->method->ssl3_enc->client_finished_label,
511 s->method->ssl3_enc->client_finished_label_len);
512 if (ret <= 0) goto end;
513 s->s3->flags |= SSL3_FLAGS_CCS_OK;
514 s->state=SSL3_ST_CW_FLUSH;
515
516 /* clear flags */
517 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
518 if (s->hit)
519 {
520 s->s3->tmp.next_state=SSL_ST_OK;
521 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
522 {
523 s->state=SSL_ST_OK;
524 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
525 s->s3->delay_buf_pop_ret=0;
526 }
527 }
528 else
529 {
530 #ifndef OPENSSL_NO_TLSEXT
531 /* Allow NewSessionTicket if ticket expected */
532 if (s->tlsext_ticket_expected)
533 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
534 else
535 #endif
536
537 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
538 }
539 s->init_num=0;
540 break;
541
542 #ifndef OPENSSL_NO_TLSEXT
543 case SSL3_ST_CR_SESSION_TICKET_A:
544 case SSL3_ST_CR_SESSION_TICKET_B:
545 ret=ssl3_get_new_session_ticket(s);
546 if (ret <= 0) goto end;
547 s->state=SSL3_ST_CR_FINISHED_A;
548 s->init_num=0;
549 break;
550
551 case SSL3_ST_CR_CERT_STATUS_A:
552 case SSL3_ST_CR_CERT_STATUS_B:
553 ret=ssl3_get_cert_status(s);
554 if (ret <= 0) goto end;
555 s->state=SSL3_ST_CR_KEY_EXCH_A;
556 s->init_num=0;
557 break;
558 #endif
559
560 case SSL3_ST_CR_FINISHED_A:
561 case SSL3_ST_CR_FINISHED_B:
562
563 s->s3->flags |= SSL3_FLAGS_CCS_OK;
564 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
565 SSL3_ST_CR_FINISHED_B);
566 if (ret <= 0) goto end;
567
568 if (s->hit)
569 s->state=SSL3_ST_CW_CHANGE_A;
570 else
571 s->state=SSL_ST_OK;
572 s->init_num=0;
573 break;
574
575 case SSL3_ST_CW_FLUSH:
576 s->rwstate=SSL_WRITING;
577 if (BIO_flush(s->wbio) <= 0)
578 {
579 ret= -1;
580 goto end;
581 }
582 s->rwstate=SSL_NOTHING;
583 s->state=s->s3->tmp.next_state;
584 break;
585
586 case SSL_ST_OK:
587 /* clean a few things up */
588 ssl3_cleanup_key_block(s);
589
590 if (s->init_buf != NULL)
591 {
592 BUF_MEM_free(s->init_buf);
593 s->init_buf=NULL;
594 }
595
596 /* If we are not 'joining' the last two packets,
597 * remove the buffering now */
598 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
599 ssl_free_wbio_buffer(s);
600 /* else do it later in ssl3_write */
601
602 s->init_num=0;
603 s->renegotiate=0;
604 s->new_session=0;
605
606 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
607 if (s->hit) s->ctx->stats.sess_hit++;
608
609 ret=1;
610 /* s->server=0; */
611 s->handshake_func=ssl3_connect;
612 s->ctx->stats.sess_connect_good++;
613
614 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
615
616 goto end;
617 /* break; */
618
619 default:
620 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
621 ret= -1;
622 goto end;
623 /* break; */
624 }
625
626 /* did we do anything */
627 if (!s->s3->tmp.reuse_message && !skip)
628 {
629 if (s->debug)
630 {
631 if ((ret=BIO_flush(s->wbio)) <= 0)
632 goto end;
633 }
634
635 if ((cb != NULL) && (s->state != state))
636 {
637 new_state=s->state;
638 s->state=state;
639 cb(s,SSL_CB_CONNECT_LOOP,1);
640 s->state=new_state;
641 }
642 }
643 skip=0;
644 }
645 end:
646 s->in_handshake--;
647 if (buf != NULL)
648 BUF_MEM_free(buf);
649 if (cb != NULL)
650 cb(s,SSL_CB_CONNECT_EXIT,ret);
651 return(ret);
652 }
653
654
655 int ssl3_client_hello(SSL *s)
656 {
657 unsigned char *buf;
658 unsigned char *p,*d;
659 int i;
660 unsigned long l;
661 #ifndef OPENSSL_NO_COMP
662 int j;
663 SSL_COMP *comp;
664 #endif
665
666 buf=(unsigned char *)s->init_buf->data;
667 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
668 {
669 SSL_SESSION *sess = s->session;
670 if ((sess == NULL) ||
671 (sess->ssl_version != s->version) ||
672 #ifdef OPENSSL_NO_TLSEXT
673 !sess->session_id_length ||
674 #else
675 (!sess->session_id_length && !sess->tlsext_tick) ||
676 #endif
677 (sess->not_resumable))
678 {
679 if (!ssl_get_new_session(s,0))
680 goto err;
681 }
682 /* else use the pre-loaded session */
683
684 p=s->s3->client_random;
685
686 if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0)
687 goto err;
688
689 /* Do the message type and length last */
690 d=p= &(buf[4]);
691
692 /* version indicates the negotiated version: for example from
693 * an SSLv2/v3 compatible client hello). The client_version
694 * field is the maximum version we permit and it is also
695 * used in RSA encrypted premaster secrets. Some servers can
696 * choke if we initially report a higher version then
697 * renegotiate to a lower one in the premaster secret. This
698 * didn't happen with TLS 1.0 as most servers supported it
699 * but it can with TLS 1.1 or later if the server only supports
700 * 1.0.
701 *
702 * Possible scenario with previous logic:
703 * 1. Client hello indicates TLS 1.2
704 * 2. Server hello says TLS 1.0
705 * 3. RSA encrypted premaster secret uses 1.2.
706 * 4. Handhaked proceeds using TLS 1.0.
707 * 5. Server sends hello request to renegotiate.
708 * 6. Client hello indicates TLS v1.0 as we now
709 * know that is maximum server supports.
710 * 7. Server chokes on RSA encrypted premaster secret
711 * containing version 1.0.
712 *
713 * For interoperability it should be OK to always use the
714 * maximum version we support in client hello and then rely
715 * on the checking of version to ensure the servers isn't
716 * being inconsistent: for example initially negotiating with
717 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
718 * client_version in client hello and not resetting it to
719 * the negotiated version.
720 */
721 #if 0
722 *(p++)=s->version>>8;
723 *(p++)=s->version&0xff;
724 s->client_version=s->version;
725 #else
726 *(p++)=s->client_version>>8;
727 *(p++)=s->client_version&0xff;
728 #endif
729
730 /* Random stuff */
731 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
732 p+=SSL3_RANDOM_SIZE;
733
734 /* Session ID */
735 if (s->new_session)
736 i=0;
737 else
738 i=s->session->session_id_length;
739 *(p++)=i;
740 if (i != 0)
741 {
742 if (i > (int)sizeof(s->session->session_id))
743 {
744 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
745 goto err;
746 }
747 memcpy(p,s->session->session_id,i);
748 p+=i;
749 }
750
751 /* Ciphers supported */
752 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
753 if (i == 0)
754 {
755 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
756 goto err;
757 }
758 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
759 /* Some servers hang if client hello > 256 bytes
760 * as hack workaround chop number of supported ciphers
761 * to keep it well below this if we use TLS v1.2
762 */
763 if (TLS1_get_version(s) >= TLS1_2_VERSION
764 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
765 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
766 #endif
767 s2n(i,p);
768 p+=i;
769
770 /* COMPRESSION */
771 #ifdef OPENSSL_NO_COMP
772 *(p++)=1;
773 #else
774
775 if ((s->options & SSL_OP_NO_COMPRESSION)
776 || !s->ctx->comp_methods)
777 j=0;
778 else
779 j=sk_SSL_COMP_num(s->ctx->comp_methods);
780 *(p++)=1+j;
781 for (i=0; i<j; i++)
782 {
783 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
784 *(p++)=comp->id;
785 }
786 #endif
787 *(p++)=0; /* Add the NULL method */
788
789 #ifndef OPENSSL_NO_TLSEXT
790 /* TLS extensions*/
791 if (ssl_prepare_clienthello_tlsext(s) <= 0)
792 {
793 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
794 goto err;
795 }
796 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
797 {
798 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
799 goto err;
800 }
801 #endif
802
803 l=(p-d);
804 d=buf;
805 *(d++)=SSL3_MT_CLIENT_HELLO;
806 l2n3(l,d);
807
808 s->state=SSL3_ST_CW_CLNT_HELLO_B;
809 /* number of bytes to write */
810 s->init_num=p-buf;
811 s->init_off=0;
812 }
813
814 /* SSL3_ST_CW_CLNT_HELLO_B */
815 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
816 err:
817 return(-1);
818 }
819
820 int ssl3_get_server_hello(SSL *s)
821 {
822 STACK_OF(SSL_CIPHER) *sk;
823 const SSL_CIPHER *c;
824 unsigned char *p,*d;
825 int i,al,ok;
826 unsigned int j;
827 long n;
828 #ifndef OPENSSL_NO_COMP
829 SSL_COMP *comp;
830 #endif
831
832 n=s->method->ssl_get_message(s,
833 SSL3_ST_CR_SRVR_HELLO_A,
834 SSL3_ST_CR_SRVR_HELLO_B,
835 -1,
836 20000, /* ?? */
837 &ok);
838
839 if (!ok) return((int)n);
840
841 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
842 {
843 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
844 {
845 if ( s->d1->send_cookie == 0)
846 {
847 s->s3->tmp.reuse_message = 1;
848 return 1;
849 }
850 else /* already sent a cookie */
851 {
852 al=SSL_AD_UNEXPECTED_MESSAGE;
853 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
854 goto f_err;
855 }
856 }
857 }
858
859 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
860 {
861 al=SSL_AD_UNEXPECTED_MESSAGE;
862 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
863 goto f_err;
864 }
865
866 d=p=(unsigned char *)s->init_msg;
867
868 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
869 {
870 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
871 s->version=(s->version&0xff00)|p[1];
872 al=SSL_AD_PROTOCOL_VERSION;
873 goto f_err;
874 }
875 p+=2;
876
877 /* load the server hello data */
878 /* load the server random */
879 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
880 p+=SSL3_RANDOM_SIZE;
881
882 /* get the session-id */
883 j= *(p++);
884
885 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
886 {
887 al=SSL_AD_ILLEGAL_PARAMETER;
888 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
889 goto f_err;
890 }
891
892 #ifndef OPENSSL_NO_TLSEXT
893 /* check if we want to resume the session based on external pre-shared secret */
894 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
895 {
896 SSL_CIPHER *pref_cipher=NULL;
897 s->session->master_key_length=sizeof(s->session->master_key);
898 if (s->tls_session_secret_cb(s, s->session->master_key,
899 &s->session->master_key_length,
900 NULL, &pref_cipher,
901 s->tls_session_secret_cb_arg))
902 {
903 s->session->cipher = pref_cipher ?
904 pref_cipher : ssl_get_cipher_by_char(s, p+j);
905 s->s3->flags |= SSL3_FLAGS_CCS_OK;
906 }
907 }
908 #endif /* OPENSSL_NO_TLSEXT */
909
910 if (j != 0 && j == s->session->session_id_length
911 && memcmp(p,s->session->session_id,j) == 0)
912 {
913 if(s->sid_ctx_length != s->session->sid_ctx_length
914 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
915 {
916 /* actually a client application bug */
917 al=SSL_AD_ILLEGAL_PARAMETER;
918 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
919 goto f_err;
920 }
921 s->s3->flags |= SSL3_FLAGS_CCS_OK;
922 s->hit=1;
923 }
924 else /* a miss or crap from the other end */
925 {
926 /* If we were trying for session-id reuse, make a new
927 * SSL_SESSION so we don't stuff up other people */
928 s->hit=0;
929 if (s->session->session_id_length > 0)
930 {
931 if (!ssl_get_new_session(s,0))
932 {
933 al=SSL_AD_INTERNAL_ERROR;
934 goto f_err;
935 }
936 }
937 s->session->session_id_length=j;
938 memcpy(s->session->session_id,p,j); /* j could be 0 */
939 }
940 p+=j;
941 c=ssl_get_cipher_by_char(s,p);
942 if (c == NULL)
943 {
944 /* unknown cipher */
945 al=SSL_AD_ILLEGAL_PARAMETER;
946 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
947 goto f_err;
948 }
949 /* TLS v1.2 only ciphersuites require v1.2 or later */
950 if ((c->algorithm_ssl & SSL_TLSV1_2) &&
951 (TLS1_get_version(s) < TLS1_2_VERSION))
952 {
953 al=SSL_AD_ILLEGAL_PARAMETER;
954 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
955 goto f_err;
956 }
957 #ifndef OPENSSL_NO_SRP
958 if (((c->algorithm_mkey & SSL_kSRP) || (c->algorithm_auth & SSL_aSRP)) &&
959 !(s->srp_ctx.srp_Mask & SSL_kSRP))
960 {
961 al=SSL_AD_ILLEGAL_PARAMETER;
962 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
963 goto f_err;
964 }
965 #endif /* OPENSSL_NO_SRP */
966 p+=ssl_put_cipher_by_char(s,NULL,NULL);
967
968 sk=ssl_get_ciphers_by_id(s);
969 i=sk_SSL_CIPHER_find(sk,c);
970 if (i < 0)
971 {
972 /* we did not say we would use this cipher */
973 al=SSL_AD_ILLEGAL_PARAMETER;
974 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
975 goto f_err;
976 }
977
978 /* Depending on the session caching (internal/external), the cipher
979 and/or cipher_id values may not be set. Make sure that
980 cipher_id is set and use it for comparison. */
981 if (s->session->cipher)
982 s->session->cipher_id = s->session->cipher->id;
983 if (s->hit && (s->session->cipher_id != c->id))
984 {
985 /* Workaround is now obsolete */
986 #if 0
987 if (!(s->options &
988 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
989 #endif
990 {
991 al=SSL_AD_ILLEGAL_PARAMETER;
992 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
993 goto f_err;
994 }
995 }
996 s->s3->tmp.new_cipher=c;
997 /* Don't digest cached records if TLS v1.2: we may need them for
998 * client authentication.
999 */
1000 if (TLS1_get_version(s) < TLS1_2_VERSION && !ssl3_digest_cached_records(s))
1001 {
1002 al = SSL_AD_INTERNAL_ERROR;
1003 goto f_err;
1004 }
1005 /* lets get the compression algorithm */
1006 /* COMPRESSION */
1007 #ifdef OPENSSL_NO_COMP
1008 if (*(p++) != 0)
1009 {
1010 al=SSL_AD_ILLEGAL_PARAMETER;
1011 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1012 goto f_err;
1013 }
1014 /* If compression is disabled we'd better not try to resume a session
1015 * using compression.
1016 */
1017 if (s->session->compress_meth != 0)
1018 {
1019 al=SSL_AD_INTERNAL_ERROR;
1020 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1021 goto f_err;
1022 }
1023 #else
1024 j= *(p++);
1025 if (s->hit && j != s->session->compress_meth)
1026 {
1027 al=SSL_AD_ILLEGAL_PARAMETER;
1028 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1029 goto f_err;
1030 }
1031 if (j == 0)
1032 comp=NULL;
1033 else if (s->options & SSL_OP_NO_COMPRESSION)
1034 {
1035 al=SSL_AD_ILLEGAL_PARAMETER;
1036 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1037 goto f_err;
1038 }
1039 else
1040 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1041
1042 if ((j != 0) && (comp == NULL))
1043 {
1044 al=SSL_AD_ILLEGAL_PARAMETER;
1045 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1046 goto f_err;
1047 }
1048 else
1049 {
1050 s->s3->tmp.new_compression=comp;
1051 }
1052 #endif
1053
1054 #ifndef OPENSSL_NO_TLSEXT
1055 /* TLS extensions*/
1056 if (s->version >= SSL3_VERSION)
1057 {
1058 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al))
1059 {
1060 /* 'al' set by ssl_parse_serverhello_tlsext */
1061 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1062 goto f_err;
1063 }
1064 if (ssl_check_serverhello_tlsext(s) <= 0)
1065 {
1066 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT);
1067 goto err;
1068 }
1069 }
1070 #endif
1071
1072 if (p != (d+n))
1073 {
1074 /* wrong packet length */
1075 al=SSL_AD_DECODE_ERROR;
1076 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1077 goto f_err;
1078 }
1079
1080 return(1);
1081 f_err:
1082 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1083 err:
1084 return(-1);
1085 }
1086
1087 int ssl3_get_server_certificate(SSL *s)
1088 {
1089 int al,i,ok,ret= -1;
1090 unsigned long n,nc,llen,l;
1091 X509 *x=NULL;
1092 const unsigned char *q,*p;
1093 unsigned char *d;
1094 STACK_OF(X509) *sk=NULL;
1095 SESS_CERT *sc;
1096 EVP_PKEY *pkey=NULL;
1097 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1098
1099 n=s->method->ssl_get_message(s,
1100 SSL3_ST_CR_CERT_A,
1101 SSL3_ST_CR_CERT_B,
1102 -1,
1103 s->max_cert_list,
1104 &ok);
1105
1106 if (!ok) return((int)n);
1107
1108 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1109 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1110 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1111 {
1112 s->s3->tmp.reuse_message=1;
1113 return(1);
1114 }
1115
1116 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1117 {
1118 al=SSL_AD_UNEXPECTED_MESSAGE;
1119 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1120 goto f_err;
1121 }
1122 p=d=(unsigned char *)s->init_msg;
1123
1124 if ((sk=sk_X509_new_null()) == NULL)
1125 {
1126 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1127 goto err;
1128 }
1129
1130 n2l3(p,llen);
1131 if (llen+3 != n)
1132 {
1133 al=SSL_AD_DECODE_ERROR;
1134 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1135 goto f_err;
1136 }
1137 for (nc=0; nc<llen; )
1138 {
1139 n2l3(p,l);
1140 if ((l+nc+3) > llen)
1141 {
1142 al=SSL_AD_DECODE_ERROR;
1143 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1144 goto f_err;
1145 }
1146
1147 q=p;
1148 x=d2i_X509(NULL,&q,l);
1149 if (x == NULL)
1150 {
1151 al=SSL_AD_BAD_CERTIFICATE;
1152 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1153 goto f_err;
1154 }
1155 if (q != (p+l))
1156 {
1157 al=SSL_AD_DECODE_ERROR;
1158 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1159 goto f_err;
1160 }
1161 if (!sk_X509_push(sk,x))
1162 {
1163 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1164 goto err;
1165 }
1166 x=NULL;
1167 nc+=l+3;
1168 p=q;
1169 }
1170
1171 i=ssl_verify_cert_chain(s,sk);
1172 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1173 #ifndef OPENSSL_NO_KRB5
1174 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1175 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1176 #endif /* OPENSSL_NO_KRB5 */
1177 )
1178 {
1179 al=ssl_verify_alarm_type(s->verify_result);
1180 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1181 goto f_err;
1182 }
1183 ERR_clear_error(); /* but we keep s->verify_result */
1184
1185 sc=ssl_sess_cert_new();
1186 if (sc == NULL) goto err;
1187
1188 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1189 s->session->sess_cert=sc;
1190
1191 sc->cert_chain=sk;
1192 /* Inconsistency alert: cert_chain does include the peer's
1193 * certificate, which we don't include in s3_srvr.c */
1194 x=sk_X509_value(sk,0);
1195 sk=NULL;
1196 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1197
1198 pkey=X509_get_pubkey(x);
1199
1200 /* VRS: allow null cert if auth == KRB5 */
1201 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1202 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1203 ? 0 : 1;
1204
1205 #ifdef KSSL_DEBUG
1206 printf("pkey,x = %p, %p\n", pkey,x);
1207 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1208 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1209 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1210 #endif /* KSSL_DEBUG */
1211
1212 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1213 {
1214 x=NULL;
1215 al=SSL3_AL_FATAL;
1216 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1217 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1218 goto f_err;
1219 }
1220
1221 i=ssl_cert_type(x,pkey);
1222 if (need_cert && i < 0)
1223 {
1224 x=NULL;
1225 al=SSL3_AL_FATAL;
1226 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1227 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1228 goto f_err;
1229 }
1230
1231 if (need_cert)
1232 {
1233 sc->peer_cert_type=i;
1234 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1235 /* Why would the following ever happen?
1236 * We just created sc a couple of lines ago. */
1237 if (sc->peer_pkeys[i].x509 != NULL)
1238 X509_free(sc->peer_pkeys[i].x509);
1239 sc->peer_pkeys[i].x509=x;
1240 sc->peer_key= &(sc->peer_pkeys[i]);
1241
1242 if (s->session->peer != NULL)
1243 X509_free(s->session->peer);
1244 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1245 s->session->peer=x;
1246 }
1247 else
1248 {
1249 sc->peer_cert_type=i;
1250 sc->peer_key= NULL;
1251
1252 if (s->session->peer != NULL)
1253 X509_free(s->session->peer);
1254 s->session->peer=NULL;
1255 }
1256 s->session->verify_result = s->verify_result;
1257
1258 x=NULL;
1259 ret=1;
1260
1261 if (0)
1262 {
1263 f_err:
1264 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1265 }
1266 err:
1267 EVP_PKEY_free(pkey);
1268 X509_free(x);
1269 sk_X509_pop_free(sk,X509_free);
1270 return(ret);
1271 }
1272
1273 int ssl3_get_key_exchange(SSL *s)
1274 {
1275 #ifndef OPENSSL_NO_RSA
1276 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1277 #endif
1278 EVP_MD_CTX md_ctx;
1279 unsigned char *param,*p;
1280 int al,i,j,param_len,ok;
1281 long n,alg_k,alg_a;
1282 EVP_PKEY *pkey=NULL;
1283 const EVP_MD *md = NULL;
1284 #ifndef OPENSSL_NO_RSA
1285 RSA *rsa=NULL;
1286 #endif
1287 #ifndef OPENSSL_NO_DH
1288 DH *dh=NULL;
1289 #endif
1290 #ifndef OPENSSL_NO_ECDH
1291 EC_KEY *ecdh = NULL;
1292 BN_CTX *bn_ctx = NULL;
1293 EC_POINT *srvr_ecpoint = NULL;
1294 int curve_nid = 0;
1295 int encoded_pt_len = 0;
1296 #endif
1297
1298 /* use same message size as in ssl3_get_certificate_request()
1299 * as ServerKeyExchange message may be skipped */
1300 n=s->method->ssl_get_message(s,
1301 SSL3_ST_CR_KEY_EXCH_A,
1302 SSL3_ST_CR_KEY_EXCH_B,
1303 -1,
1304 s->max_cert_list,
1305 &ok);
1306 if (!ok) return((int)n);
1307
1308 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1309 {
1310 #ifndef OPENSSL_NO_PSK
1311 /* In plain PSK ciphersuite, ServerKeyExchange can be
1312 omitted if no identity hint is sent. Set
1313 session->sess_cert anyway to avoid problems
1314 later.*/
1315 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1316 {
1317 s->session->sess_cert=ssl_sess_cert_new();
1318 if (s->ctx->psk_identity_hint)
1319 OPENSSL_free(s->ctx->psk_identity_hint);
1320 s->ctx->psk_identity_hint = NULL;
1321 }
1322 #endif
1323 s->s3->tmp.reuse_message=1;
1324 return(1);
1325 }
1326
1327 param=p=(unsigned char *)s->init_msg;
1328 if (s->session->sess_cert != NULL)
1329 {
1330 #ifndef OPENSSL_NO_RSA
1331 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1332 {
1333 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1334 s->session->sess_cert->peer_rsa_tmp=NULL;
1335 }
1336 #endif
1337 #ifndef OPENSSL_NO_DH
1338 if (s->session->sess_cert->peer_dh_tmp)
1339 {
1340 DH_free(s->session->sess_cert->peer_dh_tmp);
1341 s->session->sess_cert->peer_dh_tmp=NULL;
1342 }
1343 #endif
1344 #ifndef OPENSSL_NO_ECDH
1345 if (s->session->sess_cert->peer_ecdh_tmp)
1346 {
1347 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1348 s->session->sess_cert->peer_ecdh_tmp=NULL;
1349 }
1350 #endif
1351 }
1352 else
1353 {
1354 s->session->sess_cert=ssl_sess_cert_new();
1355 }
1356
1357 param_len=0;
1358 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1359 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1360 EVP_MD_CTX_init(&md_ctx);
1361
1362 #ifndef OPENSSL_NO_PSK
1363 if (alg_k & SSL_kPSK)
1364 {
1365 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1366
1367 al=SSL_AD_HANDSHAKE_FAILURE;
1368 n2s(p,i);
1369 param_len=i+2;
1370 /* Store PSK identity hint for later use, hint is used
1371 * in ssl3_send_client_key_exchange. Assume that the
1372 * maximum length of a PSK identity hint can be as
1373 * long as the maximum length of a PSK identity. */
1374 if (i > PSK_MAX_IDENTITY_LEN)
1375 {
1376 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1377 SSL_R_DATA_LENGTH_TOO_LONG);
1378 goto f_err;
1379 }
1380 if (param_len > n)
1381 {
1382 al=SSL_AD_DECODE_ERROR;
1383 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1384 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1385 goto f_err;
1386 }
1387 /* If received PSK identity hint contains NULL
1388 * characters, the hint is truncated from the first
1389 * NULL. p may not be ending with NULL, so create a
1390 * NULL-terminated string. */
1391 memcpy(tmp_id_hint, p, i);
1392 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1393 if (s->ctx->psk_identity_hint != NULL)
1394 OPENSSL_free(s->ctx->psk_identity_hint);
1395 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1396 if (s->ctx->psk_identity_hint == NULL)
1397 {
1398 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1399 goto f_err;
1400 }
1401
1402 p+=i;
1403 n-=param_len;
1404 }
1405 else
1406 #endif /* !OPENSSL_NO_PSK */
1407 #ifndef OPENSSL_NO_SRP
1408 if (alg_k & SSL_kSRP)
1409 {
1410 n2s(p,i);
1411 param_len=i+2;
1412 if (param_len > n)
1413 {
1414 al=SSL_AD_DECODE_ERROR;
1415 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1416 goto f_err;
1417 }
1418 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1419 {
1420 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1421 goto err;
1422 }
1423 p+=i;
1424
1425 n2s(p,i);
1426 param_len+=i+2;
1427 if (param_len > n)
1428 {
1429 al=SSL_AD_DECODE_ERROR;
1430 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1431 goto f_err;
1432 }
1433 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1434 {
1435 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1436 goto err;
1437 }
1438 p+=i;
1439
1440 i = (unsigned int)(p[0]);
1441 p++;
1442 param_len+=i+1;
1443 if (param_len > n)
1444 {
1445 al=SSL_AD_DECODE_ERROR;
1446 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1447 goto f_err;
1448 }
1449 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1450 {
1451 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1452 goto err;
1453 }
1454 p+=i;
1455
1456 n2s(p,i);
1457 param_len+=i+2;
1458 if (param_len > n)
1459 {
1460 al=SSL_AD_DECODE_ERROR;
1461 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1462 goto f_err;
1463 }
1464 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1465 {
1466 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1467 goto err;
1468 }
1469 p+=i;
1470 n-=param_len;
1471
1472 if (!srp_verify_server_param(s, &al))
1473 {
1474 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_PARAMETERS);
1475 goto f_err;
1476 }
1477
1478 /* We must check if there is a certificate */
1479 #ifndef OPENSSL_NO_RSA
1480 if (alg_a & SSL_aRSA)
1481 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1482 #else
1483 if (0)
1484 ;
1485 #endif
1486 #ifndef OPENSSL_NO_DSA
1487 else if (alg_a & SSL_aDSS)
1488 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1489 #endif
1490 }
1491 else
1492 #endif /* !OPENSSL_NO_SRP */
1493 #ifndef OPENSSL_NO_RSA
1494 if (alg_k & SSL_kRSA)
1495 {
1496 if ((rsa=RSA_new()) == NULL)
1497 {
1498 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1499 goto err;
1500 }
1501 n2s(p,i);
1502 param_len=i+2;
1503 if (param_len > n)
1504 {
1505 al=SSL_AD_DECODE_ERROR;
1506 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1507 goto f_err;
1508 }
1509 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1510 {
1511 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1512 goto err;
1513 }
1514 p+=i;
1515
1516 n2s(p,i);
1517 param_len+=i+2;
1518 if (param_len > n)
1519 {
1520 al=SSL_AD_DECODE_ERROR;
1521 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1522 goto f_err;
1523 }
1524 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1525 {
1526 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1527 goto err;
1528 }
1529 p+=i;
1530 n-=param_len;
1531
1532 /* this should be because we are using an export cipher */
1533 if (alg_a & SSL_aRSA)
1534 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1535 else
1536 {
1537 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1538 goto err;
1539 }
1540 s->session->sess_cert->peer_rsa_tmp=rsa;
1541 rsa=NULL;
1542 }
1543 #else /* OPENSSL_NO_RSA */
1544 if (0)
1545 ;
1546 #endif
1547 #ifndef OPENSSL_NO_DH
1548 else if (alg_k & SSL_kEDH)
1549 {
1550 if ((dh=DH_new()) == NULL)
1551 {
1552 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1553 goto err;
1554 }
1555 n2s(p,i);
1556 param_len=i+2;
1557 if (param_len > n)
1558 {
1559 al=SSL_AD_DECODE_ERROR;
1560 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1561 goto f_err;
1562 }
1563 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1564 {
1565 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1566 goto err;
1567 }
1568 p+=i;
1569
1570 n2s(p,i);
1571 param_len+=i+2;
1572 if (param_len > n)
1573 {
1574 al=SSL_AD_DECODE_ERROR;
1575 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1576 goto f_err;
1577 }
1578 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1579 {
1580 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1581 goto err;
1582 }
1583 p+=i;
1584
1585 n2s(p,i);
1586 param_len+=i+2;
1587 if (param_len > n)
1588 {
1589 al=SSL_AD_DECODE_ERROR;
1590 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1591 goto f_err;
1592 }
1593 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1594 {
1595 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1596 goto err;
1597 }
1598 p+=i;
1599 n-=param_len;
1600
1601 #ifndef OPENSSL_NO_RSA
1602 if (alg_a & SSL_aRSA)
1603 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1604 #else
1605 if (0)
1606 ;
1607 #endif
1608 #ifndef OPENSSL_NO_DSA
1609 else if (alg_a & SSL_aDSS)
1610 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1611 #endif
1612 /* else anonymous DH, so no certificate or pkey. */
1613
1614 s->session->sess_cert->peer_dh_tmp=dh;
1615 dh=NULL;
1616 }
1617 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1618 {
1619 al=SSL_AD_ILLEGAL_PARAMETER;
1620 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1621 goto f_err;
1622 }
1623 #endif /* !OPENSSL_NO_DH */
1624
1625 #ifndef OPENSSL_NO_ECDH
1626 else if (alg_k & SSL_kEECDH)
1627 {
1628 EC_GROUP *ngroup;
1629 const EC_GROUP *group;
1630
1631 if ((ecdh=EC_KEY_new()) == NULL)
1632 {
1633 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1634 goto err;
1635 }
1636
1637 /* Extract elliptic curve parameters and the
1638 * server's ephemeral ECDH public key.
1639 * Keep accumulating lengths of various components in
1640 * param_len and make sure it never exceeds n.
1641 */
1642
1643 /* XXX: For now we only support named (not generic) curves
1644 * and the ECParameters in this case is just three bytes.
1645 */
1646 param_len=3;
1647 if ((param_len > n) ||
1648 (*p != NAMED_CURVE_TYPE) ||
1649 ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0))
1650 {
1651 al=SSL_AD_INTERNAL_ERROR;
1652 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1653 goto f_err;
1654 }
1655
1656 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1657 if (ngroup == NULL)
1658 {
1659 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1660 goto err;
1661 }
1662 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1663 {
1664 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1665 goto err;
1666 }
1667 EC_GROUP_free(ngroup);
1668
1669 group = EC_KEY_get0_group(ecdh);
1670
1671 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1672 (EC_GROUP_get_degree(group) > 163))
1673 {
1674 al=SSL_AD_EXPORT_RESTRICTION;
1675 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1676 goto f_err;
1677 }
1678
1679 p+=3;
1680
1681 /* Next, get the encoded ECPoint */
1682 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1683 ((bn_ctx = BN_CTX_new()) == NULL))
1684 {
1685 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1686 goto err;
1687 }
1688
1689 encoded_pt_len = *p; /* length of encoded point */
1690 p+=1;
1691 param_len += (1 + encoded_pt_len);
1692 if ((param_len > n) ||
1693 (EC_POINT_oct2point(group, srvr_ecpoint,
1694 p, encoded_pt_len, bn_ctx) == 0))
1695 {
1696 al=SSL_AD_DECODE_ERROR;
1697 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1698 goto f_err;
1699 }
1700
1701 n-=param_len;
1702 p+=encoded_pt_len;
1703
1704 /* The ECC/TLS specification does not mention
1705 * the use of DSA to sign ECParameters in the server
1706 * key exchange message. We do support RSA and ECDSA.
1707 */
1708 if (0) ;
1709 #ifndef OPENSSL_NO_RSA
1710 else if (alg_a & SSL_aRSA)
1711 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1712 #endif
1713 #ifndef OPENSSL_NO_ECDSA
1714 else if (alg_a & SSL_aECDSA)
1715 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1716 #endif
1717 /* else anonymous ECDH, so no certificate or pkey. */
1718 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1719 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1720 ecdh=NULL;
1721 BN_CTX_free(bn_ctx);
1722 bn_ctx = NULL;
1723 EC_POINT_free(srvr_ecpoint);
1724 srvr_ecpoint = NULL;
1725 }
1726 else if (alg_k)
1727 {
1728 al=SSL_AD_UNEXPECTED_MESSAGE;
1729 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1730 goto f_err;
1731 }
1732 #endif /* !OPENSSL_NO_ECDH */
1733
1734
1735 /* p points to the next byte, there are 'n' bytes left */
1736
1737 /* if it was signed, check the signature */
1738 if (pkey != NULL)
1739 {
1740 if (TLS1_get_version(s) >= TLS1_2_VERSION)
1741 {
1742 int sigalg = tls12_get_sigid(pkey);
1743 /* Should never happen */
1744 if (sigalg == -1)
1745 {
1746 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1747 goto err;
1748 }
1749 /* Check key type is consistent with signature */
1750 if (sigalg != (int)p[1])
1751 {
1752 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_TYPE);
1753 al=SSL_AD_DECODE_ERROR;
1754 goto f_err;
1755 }
1756 md = tls12_get_hash(p[0]);
1757 if (md == NULL)
1758 {
1759 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNKNOWN_DIGEST);
1760 al=SSL_AD_DECODE_ERROR;
1761 goto f_err;
1762 }
1763 #ifdef SSL_DEBUG
1764 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1765 #endif
1766 p += 2;
1767 n -= 2;
1768 }
1769 else
1770 md = EVP_sha1();
1771
1772 n2s(p,i);
1773 n-=2;
1774 j=EVP_PKEY_size(pkey);
1775
1776 if ((i != n) || (n > j) || (n <= 0))
1777 {
1778 /* wrong packet length */
1779 al=SSL_AD_DECODE_ERROR;
1780 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1781 goto f_err;
1782 }
1783
1784 #ifndef OPENSSL_NO_RSA
1785 if (pkey->type == EVP_PKEY_RSA && TLS1_get_version(s) < TLS1_2_VERSION)
1786 {
1787 int num;
1788
1789 j=0;
1790 q=md_buf;
1791 for (num=2; num > 0; num--)
1792 {
1793 EVP_MD_CTX_set_flags(&md_ctx,
1794 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1795 EVP_DigestInit_ex(&md_ctx,(num == 2)
1796 ?s->ctx->md5:s->ctx->sha1, NULL);
1797 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1798 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1799 EVP_DigestUpdate(&md_ctx,param,param_len);
1800 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1801 q+=i;
1802 j+=i;
1803 }
1804 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1805 pkey->pkey.rsa);
1806 if (i < 0)
1807 {
1808 al=SSL_AD_DECRYPT_ERROR;
1809 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1810 goto f_err;
1811 }
1812 if (i == 0)
1813 {
1814 /* bad signature */
1815 al=SSL_AD_DECRYPT_ERROR;
1816 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1817 goto f_err;
1818 }
1819 }
1820 else
1821 #endif
1822 {
1823 EVP_VerifyInit_ex(&md_ctx, md, NULL);
1824 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1825 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1826 EVP_VerifyUpdate(&md_ctx,param,param_len);
1827 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1828 {
1829 /* bad signature */
1830 al=SSL_AD_DECRYPT_ERROR;
1831 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1832 goto f_err;
1833 }
1834 }
1835 }
1836 else
1837 {
1838 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
1839 /* aNULL or kPSK do not need public keys */
1840 {
1841 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1842 goto err;
1843 }
1844 /* still data left over */
1845 if (n != 0)
1846 {
1847 al=SSL_AD_DECODE_ERROR;
1848 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1849 goto f_err;
1850 }
1851 }
1852 EVP_PKEY_free(pkey);
1853 EVP_MD_CTX_cleanup(&md_ctx);
1854 return(1);
1855 f_err:
1856 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1857 err:
1858 EVP_PKEY_free(pkey);
1859 #ifndef OPENSSL_NO_RSA
1860 if (rsa != NULL)
1861 RSA_free(rsa);
1862 #endif
1863 #ifndef OPENSSL_NO_DH
1864 if (dh != NULL)
1865 DH_free(dh);
1866 #endif
1867 #ifndef OPENSSL_NO_ECDH
1868 BN_CTX_free(bn_ctx);
1869 EC_POINT_free(srvr_ecpoint);
1870 if (ecdh != NULL)
1871 EC_KEY_free(ecdh);
1872 #endif
1873 EVP_MD_CTX_cleanup(&md_ctx);
1874 return(-1);
1875 }
1876
1877 int ssl3_get_certificate_request(SSL *s)
1878 {
1879 int ok,ret=0;
1880 unsigned long n,nc,l;
1881 unsigned int llen, ctype_num,i;
1882 X509_NAME *xn=NULL;
1883 const unsigned char *p,*q;
1884 unsigned char *d;
1885 STACK_OF(X509_NAME) *ca_sk=NULL;
1886
1887 n=s->method->ssl_get_message(s,
1888 SSL3_ST_CR_CERT_REQ_A,
1889 SSL3_ST_CR_CERT_REQ_B,
1890 -1,
1891 s->max_cert_list,
1892 &ok);
1893
1894 if (!ok) return((int)n);
1895
1896 s->s3->tmp.cert_req=0;
1897
1898 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1899 {
1900 s->s3->tmp.reuse_message=1;
1901 /* If we get here we don't need any cached handshake records
1902 * as we wont be doing client auth.
1903 */
1904 if (s->s3->handshake_buffer)
1905 {
1906 if (!ssl3_digest_cached_records(s))
1907 goto err;
1908 }
1909 return(1);
1910 }
1911
1912 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1913 {
1914 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1915 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1916 goto err;
1917 }
1918
1919 /* TLS does not like anon-DH with client cert */
1920 if (s->version > SSL3_VERSION)
1921 {
1922 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
1923 {
1924 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1925 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1926 goto err;
1927 }
1928 }
1929
1930 p=d=(unsigned char *)s->init_msg;
1931
1932 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1933 {
1934 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1935 goto err;
1936 }
1937
1938 /* get the certificate types */
1939 ctype_num= *(p++);
1940 if (ctype_num > SSL3_CT_NUMBER)
1941 ctype_num=SSL3_CT_NUMBER;
1942 for (i=0; i<ctype_num; i++)
1943 s->s3->tmp.ctype[i]= p[i];
1944 p+=ctype_num;
1945 if (TLS1_get_version(s) >= TLS1_2_VERSION)
1946 {
1947 n2s(p, llen);
1948 /* Check we have enough room for signature algorithms and
1949 * following length value.
1950 */
1951 if ((unsigned long)(p - d + llen + 2) > n)
1952 {
1953 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1954 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
1955 goto err;
1956 }
1957 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen))
1958 {
1959 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1960 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
1961 goto err;
1962 }
1963 p += llen;
1964 }
1965
1966 /* get the CA RDNs */
1967 n2s(p,llen);
1968 #if 0
1969 {
1970 FILE *out;
1971 out=fopen("/tmp/vsign.der","w");
1972 fwrite(p,1,llen,out);
1973 fclose(out);
1974 }
1975 #endif
1976
1977 if ((unsigned long)(p - d + llen) != n)
1978 {
1979 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1980 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1981 goto err;
1982 }
1983
1984 for (nc=0; nc<llen; )
1985 {
1986 n2s(p,l);
1987 if ((l+nc+2) > llen)
1988 {
1989 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1990 goto cont; /* netscape bugs */
1991 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1992 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1993 goto err;
1994 }
1995
1996 q=p;
1997
1998 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1999 {
2000 /* If netscape tolerance is on, ignore errors */
2001 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
2002 goto cont;
2003 else
2004 {
2005 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2006 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
2007 goto err;
2008 }
2009 }
2010
2011 if (q != (p+l))
2012 {
2013 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2014 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
2015 goto err;
2016 }
2017 if (!sk_X509_NAME_push(ca_sk,xn))
2018 {
2019 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2020 goto err;
2021 }
2022
2023 p+=l;
2024 nc+=l+2;
2025 }
2026
2027 if (0)
2028 {
2029 cont:
2030 ERR_clear_error();
2031 }
2032
2033 /* we should setup a certificate to return.... */
2034 s->s3->tmp.cert_req=1;
2035 s->s3->tmp.ctype_num=ctype_num;
2036 if (s->s3->tmp.ca_names != NULL)
2037 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2038 s->s3->tmp.ca_names=ca_sk;
2039 ca_sk=NULL;
2040
2041 ret=1;
2042 err:
2043 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2044 return(ret);
2045 }
2046
2047 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2048 {
2049 return(X509_NAME_cmp(*a,*b));
2050 }
2051 #ifndef OPENSSL_NO_TLSEXT
2052 int ssl3_get_new_session_ticket(SSL *s)
2053 {
2054 int ok,al,ret=0, ticklen;
2055 long n;
2056 const unsigned char *p;
2057 unsigned char *d;
2058
2059 n=s->method->ssl_get_message(s,
2060 SSL3_ST_CR_SESSION_TICKET_A,
2061 SSL3_ST_CR_SESSION_TICKET_B,
2062 -1,
2063 16384,
2064 &ok);
2065
2066 if (!ok)
2067 return((int)n);
2068
2069 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
2070 {
2071 s->s3->tmp.reuse_message=1;
2072 return(1);
2073 }
2074 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
2075 {
2076 al=SSL_AD_UNEXPECTED_MESSAGE;
2077 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2078 goto f_err;
2079 }
2080 if (n < 6)
2081 {
2082 /* need at least ticket_lifetime_hint + ticket length */
2083 al = SSL_AD_DECODE_ERROR;
2084 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2085 goto f_err;
2086 }
2087
2088 p=d=(unsigned char *)s->init_msg;
2089 n2l(p, s->session->tlsext_tick_lifetime_hint);
2090 n2s(p, ticklen);
2091 /* ticket_lifetime_hint + ticket_length + ticket */
2092 if (ticklen + 6 != n)
2093 {
2094 al = SSL_AD_DECODE_ERROR;
2095 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2096 goto f_err;
2097 }
2098 if (s->session->tlsext_tick)
2099 {
2100 OPENSSL_free(s->session->tlsext_tick);
2101 s->session->tlsext_ticklen = 0;
2102 }
2103 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2104 if (!s->session->tlsext_tick)
2105 {
2106 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2107 goto err;
2108 }
2109 memcpy(s->session->tlsext_tick, p, ticklen);
2110 s->session->tlsext_ticklen = ticklen;
2111 /* There are two ways to detect a resumed ticket sesion.
2112 * One is to set an appropriate session ID and then the server
2113 * must return a match in ServerHello. This allows the normal
2114 * client session ID matching to work and we know much
2115 * earlier that the ticket has been accepted.
2116 *
2117 * The other way is to set zero length session ID when the
2118 * ticket is presented and rely on the handshake to determine
2119 * session resumption.
2120 *
2121 * We choose the former approach because this fits in with
2122 * assumptions elsewhere in OpenSSL. The session ID is set
2123 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2124 * ticket.
2125 */
2126 EVP_Digest(p, ticklen,
2127 s->session->session_id, &s->session->session_id_length,
2128 #ifndef OPENSSL_NO_SHA256
2129 EVP_sha256(), NULL);
2130 #else
2131 EVP_sha1(), NULL);
2132 #endif
2133 ret=1;
2134 return(ret);
2135 f_err:
2136 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2137 err:
2138 return(-1);
2139 }
2140
2141 int ssl3_get_cert_status(SSL *s)
2142 {
2143 int ok, al;
2144 unsigned long resplen,n;
2145 const unsigned char *p;
2146
2147 n=s->method->ssl_get_message(s,
2148 SSL3_ST_CR_CERT_STATUS_A,
2149 SSL3_ST_CR_CERT_STATUS_B,
2150 SSL3_MT_CERTIFICATE_STATUS,
2151 16384,
2152 &ok);
2153
2154 if (!ok) return((int)n);
2155 if (n < 4)
2156 {
2157 /* need at least status type + length */
2158 al = SSL_AD_DECODE_ERROR;
2159 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2160 goto f_err;
2161 }
2162 p = (unsigned char *)s->init_msg;
2163 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2164 {
2165 al = SSL_AD_DECODE_ERROR;
2166 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2167 goto f_err;
2168 }
2169 n2l3(p, resplen);
2170 if (resplen + 4 != n)
2171 {
2172 al = SSL_AD_DECODE_ERROR;
2173 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2174 goto f_err;
2175 }
2176 if (s->tlsext_ocsp_resp)
2177 OPENSSL_free(s->tlsext_ocsp_resp);
2178 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2179 if (!s->tlsext_ocsp_resp)
2180 {
2181 al = SSL_AD_INTERNAL_ERROR;
2182 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2183 goto f_err;
2184 }
2185 s->tlsext_ocsp_resplen = resplen;
2186 if (s->ctx->tlsext_status_cb)
2187 {
2188 int ret;
2189 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2190 if (ret == 0)
2191 {
2192 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2193 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2194 goto f_err;
2195 }
2196 if (ret < 0)
2197 {
2198 al = SSL_AD_INTERNAL_ERROR;
2199 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2200 goto f_err;
2201 }
2202 }
2203 return 1;
2204 f_err:
2205 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2206 return(-1);
2207 }
2208 #endif
2209
2210 int ssl3_get_server_done(SSL *s)
2211 {
2212 int ok,ret=0;
2213 long n;
2214
2215 n=s->method->ssl_get_message(s,
2216 SSL3_ST_CR_SRVR_DONE_A,
2217 SSL3_ST_CR_SRVR_DONE_B,
2218 SSL3_MT_SERVER_DONE,
2219 30, /* should be very small, like 0 :-) */
2220 &ok);
2221
2222 if (!ok) return((int)n);
2223 if (n > 0)
2224 {
2225 /* should contain no data */
2226 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2227 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2228 return -1;
2229 }
2230 ret=1;
2231 return(ret);
2232 }
2233
2234
2235 int ssl3_send_client_key_exchange(SSL *s)
2236 {
2237 unsigned char *p,*d;
2238 int n;
2239 unsigned long alg_k;
2240 #ifndef OPENSSL_NO_RSA
2241 unsigned char *q;
2242 EVP_PKEY *pkey=NULL;
2243 #endif
2244 #ifndef OPENSSL_NO_KRB5
2245 KSSL_ERR kssl_err;
2246 #endif /* OPENSSL_NO_KRB5 */
2247 #ifndef OPENSSL_NO_ECDH
2248 EC_KEY *clnt_ecdh = NULL;
2249 const EC_POINT *srvr_ecpoint = NULL;
2250 EVP_PKEY *srvr_pub_pkey = NULL;
2251 unsigned char *encodedPoint = NULL;
2252 int encoded_pt_len = 0;
2253 BN_CTX * bn_ctx = NULL;
2254 #endif
2255
2256 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2257 {
2258 d=(unsigned char *)s->init_buf->data;
2259 p= &(d[4]);
2260
2261 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2262
2263 /* Fool emacs indentation */
2264 if (0) {}
2265 #ifndef OPENSSL_NO_RSA
2266 else if (alg_k & SSL_kRSA)
2267 {
2268 RSA *rsa;
2269 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2270
2271 if (s->session->sess_cert == NULL)
2272 {
2273 /* We should always have a server certificate with SSL_kRSA. */
2274 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2275 goto err;
2276 }
2277
2278 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2279 rsa=s->session->sess_cert->peer_rsa_tmp;
2280 else
2281 {
2282 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2283 if ((pkey == NULL) ||
2284 (pkey->type != EVP_PKEY_RSA) ||
2285 (pkey->pkey.rsa == NULL))
2286 {
2287 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2288 goto err;
2289 }
2290 rsa=pkey->pkey.rsa;
2291 EVP_PKEY_free(pkey);
2292 }
2293
2294 tmp_buf[0]=s->client_version>>8;
2295 tmp_buf[1]=s->client_version&0xff;
2296 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2297 goto err;
2298
2299 s->session->master_key_length=sizeof tmp_buf;
2300
2301 q=p;
2302 /* Fix buf for TLS and beyond */
2303 if (s->version > SSL3_VERSION)
2304 p+=2;
2305 n=RSA_public_encrypt(sizeof tmp_buf,
2306 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2307 #ifdef PKCS1_CHECK
2308 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2309 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2310 #endif
2311 if (n <= 0)
2312 {
2313 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2314 goto err;
2315 }
2316
2317 /* Fix buf for TLS and beyond */
2318 if (s->version > SSL3_VERSION)
2319 {
2320 s2n(n,q);
2321 n+=2;
2322 }
2323
2324 s->session->master_key_length=
2325 s->method->ssl3_enc->generate_master_secret(s,
2326 s->session->master_key,
2327 tmp_buf,sizeof tmp_buf);
2328 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2329 }
2330 #endif
2331 #ifndef OPENSSL_NO_KRB5
2332 else if (alg_k & SSL_kKRB5)
2333 {
2334 krb5_error_code krb5rc;
2335 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2336 /* krb5_data krb5_ap_req; */
2337 krb5_data *enc_ticket;
2338 krb5_data authenticator, *authp = NULL;
2339 EVP_CIPHER_CTX ciph_ctx;
2340 const EVP_CIPHER *enc = NULL;
2341 unsigned char iv[EVP_MAX_IV_LENGTH];
2342 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2343 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2344 + EVP_MAX_IV_LENGTH];
2345 int padl, outl = sizeof(epms);
2346
2347 EVP_CIPHER_CTX_init(&ciph_ctx);
2348
2349 #ifdef KSSL_DEBUG
2350 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2351 alg_k, SSL_kKRB5);
2352 #endif /* KSSL_DEBUG */
2353
2354 authp = NULL;
2355 #ifdef KRB5SENDAUTH
2356 if (KRB5SENDAUTH) authp = &authenticator;
2357 #endif /* KRB5SENDAUTH */
2358
2359 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2360 &kssl_err);
2361 enc = kssl_map_enc(kssl_ctx->enctype);
2362 if (enc == NULL)
2363 goto err;
2364 #ifdef KSSL_DEBUG
2365 {
2366 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2367 if (krb5rc && kssl_err.text)
2368 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2369 }
2370 #endif /* KSSL_DEBUG */
2371
2372 if (krb5rc)
2373 {
2374 ssl3_send_alert(s,SSL3_AL_FATAL,
2375 SSL_AD_HANDSHAKE_FAILURE);
2376 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2377 kssl_err.reason);
2378 goto err;
2379 }
2380
2381 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2382 ** in place of RFC 2712 KerberosWrapper, as in:
2383 **
2384 ** Send ticket (copy to *p, set n = length)
2385 ** n = krb5_ap_req.length;
2386 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2387 ** if (krb5_ap_req.data)
2388 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2389 **
2390 ** Now using real RFC 2712 KerberosWrapper
2391 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2392 ** Note: 2712 "opaque" types are here replaced
2393 ** with a 2-byte length followed by the value.
2394 ** Example:
2395 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2396 ** Where "xx xx" = length bytes. Shown here with
2397 ** optional authenticator omitted.
2398 */
2399
2400 /* KerberosWrapper.Ticket */
2401 s2n(enc_ticket->length,p);
2402 memcpy(p, enc_ticket->data, enc_ticket->length);
2403 p+= enc_ticket->length;
2404 n = enc_ticket->length + 2;
2405
2406 /* KerberosWrapper.Authenticator */
2407 if (authp && authp->length)
2408 {
2409 s2n(authp->length,p);
2410 memcpy(p, authp->data, authp->length);
2411 p+= authp->length;
2412 n+= authp->length + 2;
2413
2414 free(authp->data);
2415 authp->data = NULL;
2416 authp->length = 0;
2417 }
2418 else
2419 {
2420 s2n(0,p);/* null authenticator length */
2421 n+=2;
2422 }
2423
2424 tmp_buf[0]=s->client_version>>8;
2425 tmp_buf[1]=s->client_version&0xff;
2426 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2427 goto err;
2428
2429 /* 20010420 VRS. Tried it this way; failed.
2430 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2431 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2432 ** kssl_ctx->length);
2433 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2434 */
2435
2436 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2437 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2438 kssl_ctx->key,iv);
2439 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2440 sizeof tmp_buf);
2441 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2442 outl += padl;
2443 if (outl > (int)sizeof epms)
2444 {
2445 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2446 goto err;
2447 }
2448 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2449
2450 /* KerberosWrapper.EncryptedPreMasterSecret */
2451 s2n(outl,p);
2452 memcpy(p, epms, outl);
2453 p+=outl;
2454 n+=outl + 2;
2455
2456 s->session->master_key_length=
2457 s->method->ssl3_enc->generate_master_secret(s,
2458 s->session->master_key,
2459 tmp_buf, sizeof tmp_buf);
2460
2461 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2462 OPENSSL_cleanse(epms, outl);
2463 }
2464 #endif
2465 #ifndef OPENSSL_NO_DH
2466 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2467 {
2468 DH *dh_srvr,*dh_clnt;
2469
2470 if (s->session->sess_cert == NULL)
2471 {
2472 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2473 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2474 goto err;
2475 }
2476
2477 if (s->session->sess_cert->peer_dh_tmp != NULL)
2478 dh_srvr=s->session->sess_cert->peer_dh_tmp;
2479 else
2480 {
2481 /* we get them from the cert */
2482 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2483 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
2484 goto err;
2485 }
2486
2487 /* generate a new random key */
2488 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2489 {
2490 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2491 goto err;
2492 }
2493 if (!DH_generate_key(dh_clnt))
2494 {
2495 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2496 DH_free(dh_clnt);
2497 goto err;
2498 }
2499
2500 /* use the 'p' output buffer for the DH key, but
2501 * make sure to clear it out afterwards */
2502
2503 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2504
2505 if (n <= 0)
2506 {
2507 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2508 DH_free(dh_clnt);
2509 goto err;
2510 }
2511
2512 /* generate master key from the result */
2513 s->session->master_key_length=
2514 s->method->ssl3_enc->generate_master_secret(s,
2515 s->session->master_key,p,n);
2516 /* clean up */
2517 memset(p,0,n);
2518
2519 /* send off the data */
2520 n=BN_num_bytes(dh_clnt->pub_key);
2521 s2n(n,p);
2522 BN_bn2bin(dh_clnt->pub_key,p);
2523 n+=2;
2524
2525 DH_free(dh_clnt);
2526
2527 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2528 }
2529 #endif
2530
2531 #ifndef OPENSSL_NO_ECDH
2532 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
2533 {
2534 const EC_GROUP *srvr_group = NULL;
2535 EC_KEY *tkey;
2536 int ecdh_clnt_cert = 0;
2537 int field_size = 0;
2538
2539 if (s->session->sess_cert == NULL)
2540 {
2541 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2542 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2543 goto err;
2544 }
2545
2546 /* Did we send out the client's
2547 * ECDH share for use in premaster
2548 * computation as part of client certificate?
2549 * If so, set ecdh_clnt_cert to 1.
2550 */
2551 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2552 {
2553 /* XXX: For now, we do not support client
2554 * authentication using ECDH certificates.
2555 * To add such support, one needs to add
2556 * code that checks for appropriate
2557 * conditions and sets ecdh_clnt_cert to 1.
2558 * For example, the cert have an ECC
2559 * key on the same curve as the server's
2560 * and the key should be authorized for
2561 * key agreement.
2562 *
2563 * One also needs to add code in ssl3_connect
2564 * to skip sending the certificate verify
2565 * message.
2566 *
2567 * if ((s->cert->key->privatekey != NULL) &&
2568 * (s->cert->key->privatekey->type ==
2569 * EVP_PKEY_EC) && ...)
2570 * ecdh_clnt_cert = 1;
2571 */
2572 }
2573
2574 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2575 {
2576 tkey = s->session->sess_cert->peer_ecdh_tmp;
2577 }
2578 else
2579 {
2580 /* Get the Server Public Key from Cert */
2581 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2582 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2583 if ((srvr_pub_pkey == NULL) ||
2584 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2585 (srvr_pub_pkey->pkey.ec == NULL))
2586 {
2587 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2588 ERR_R_INTERNAL_ERROR);
2589 goto err;
2590 }
2591
2592 tkey = srvr_pub_pkey->pkey.ec;
2593 }
2594
2595 srvr_group = EC_KEY_get0_group(tkey);
2596 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2597
2598 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2599 {
2600 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2601 ERR_R_INTERNAL_ERROR);
2602 goto err;
2603 }
2604
2605 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2606 {
2607 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2608 goto err;
2609 }
2610
2611 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2612 {
2613 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2614 goto err;
2615 }
2616 if (ecdh_clnt_cert)
2617 {
2618 /* Reuse key info from our certificate
2619 * We only need our private key to perform
2620 * the ECDH computation.
2621 */
2622 const BIGNUM *priv_key;
2623 tkey = s->cert->key->privatekey->pkey.ec;
2624 priv_key = EC_KEY_get0_private_key(tkey);
2625 if (priv_key == NULL)
2626 {
2627 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2628 goto err;
2629 }
2630 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2631 {
2632 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2633 goto err;
2634 }
2635 }
2636 else
2637 {
2638 /* Generate a new ECDH key pair */
2639 if (!(EC_KEY_generate_key(clnt_ecdh)))
2640 {
2641 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2642 goto err;
2643 }
2644 }
2645
2646 /* use the 'p' output buffer for the ECDH key, but
2647 * make sure to clear it out afterwards
2648 */
2649
2650 field_size = EC_GROUP_get_degree(srvr_group);
2651 if (field_size <= 0)
2652 {
2653 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2654 ERR_R_ECDH_LIB);
2655 goto err;
2656 }
2657 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2658 if (n <= 0)
2659 {
2660 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2661 ERR_R_ECDH_LIB);
2662 goto err;
2663 }
2664
2665 /* generate master key from the result */
2666 s->session->master_key_length = s->method->ssl3_enc \
2667 -> generate_master_secret(s,
2668 s->session->master_key,
2669 p, n);
2670
2671 memset(p, 0, n); /* clean up */
2672
2673 if (ecdh_clnt_cert)
2674 {
2675 /* Send empty client key exch message */
2676 n = 0;
2677 }
2678 else
2679 {
2680 /* First check the size of encoding and
2681 * allocate memory accordingly.
2682 */
2683 encoded_pt_len =
2684 EC_POINT_point2oct(srvr_group,
2685 EC_KEY_get0_public_key(clnt_ecdh),
2686 POINT_CONVERSION_UNCOMPRESSED,
2687 NULL, 0, NULL);
2688
2689 encodedPoint = (unsigned char *)
2690 OPENSSL_malloc(encoded_pt_len *
2691 sizeof(unsigned char));
2692 bn_ctx = BN_CTX_new();
2693 if ((encodedPoint == NULL) ||
2694 (bn_ctx == NULL))
2695 {
2696 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2697 goto err;
2698 }
2699
2700 /* Encode the public key */
2701 n = EC_POINT_point2oct(srvr_group,
2702 EC_KEY_get0_public_key(clnt_ecdh),
2703 POINT_CONVERSION_UNCOMPRESSED,
2704 encodedPoint, encoded_pt_len, bn_ctx);
2705
2706 *p = n; /* length of encoded point */
2707 /* Encoded point will be copied here */
2708 p += 1;
2709 /* copy the point */
2710 memcpy((unsigned char *)p, encodedPoint, n);
2711 /* increment n to account for length field */
2712 n += 1;
2713 }
2714
2715 /* Free allocated memory */
2716 BN_CTX_free(bn_ctx);
2717 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2718 if (clnt_ecdh != NULL)
2719 EC_KEY_free(clnt_ecdh);
2720 EVP_PKEY_free(srvr_pub_pkey);
2721 }
2722 #endif /* !OPENSSL_NO_ECDH */
2723 else if (alg_k & SSL_kGOST)
2724 {
2725 /* GOST key exchange message creation */
2726 EVP_PKEY_CTX *pkey_ctx;
2727 X509 *peer_cert;
2728 size_t msglen;
2729 unsigned int md_len;
2730 int keytype;
2731 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2732 EVP_MD_CTX *ukm_hash;
2733 EVP_PKEY *pub_key;
2734
2735 /* Get server sertificate PKEY and create ctx from it */
2736 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2737 if (!peer_cert)
2738 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2739 if (!peer_cert) {
2740 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2741 goto err;
2742 }
2743
2744 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2745 /* If we have send a certificate, and certificate key
2746
2747 * parameters match those of server certificate, use
2748 * certificate key for key exchange
2749 */
2750
2751 /* Otherwise, generate ephemeral key pair */
2752
2753 EVP_PKEY_encrypt_init(pkey_ctx);
2754 /* Generate session key */
2755 RAND_bytes(premaster_secret,32);
2756 /* If we have client certificate, use its secret as peer key */
2757 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2758 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
2759 /* If there was an error - just ignore it. Ephemeral key
2760 * would be used
2761 */
2762 ERR_clear_error();
2763 }
2764 }
2765 /* Compute shared IV and store it in algorithm-specific
2766 * context data */
2767 ukm_hash = EVP_MD_CTX_create();
2768 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
2769 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
2770 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
2771 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2772 EVP_MD_CTX_destroy(ukm_hash);
2773 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
2774 8,shared_ukm)<0) {
2775 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2776 SSL_R_LIBRARY_BUG);
2777 goto err;
2778 }
2779 /* Make GOST keytransport blob message */
2780 /*Encapsulate it into sequence */
2781 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2782 msglen=255;
2783 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
2784 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2785 SSL_R_LIBRARY_BUG);
2786 goto err;
2787 }
2788 if (msglen >= 0x80)
2789 {
2790 *(p++)=0x81;
2791 *(p++)= msglen & 0xff;
2792 n=msglen+3;
2793 }
2794 else
2795 {
2796 *(p++)= msglen & 0xff;
2797 n=msglen+2;
2798 }
2799 memcpy(p, tmp, msglen);
2800 /* Check if pubkey from client certificate was used */
2801 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2802 {
2803 /* Set flag "skip certificate verify" */
2804 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2805 }
2806 EVP_PKEY_CTX_free(pkey_ctx);
2807 s->session->master_key_length=
2808 s->method->ssl3_enc->generate_master_secret(s,
2809 s->session->master_key,premaster_secret,32);
2810 EVP_PKEY_free(pub_key);
2811
2812 }
2813 #ifndef OPENSSL_NO_SRP
2814 else if (alg_k & SSL_kSRP)
2815 {
2816 if (s->srp_ctx.A != NULL)
2817 {
2818 /* send off the data */
2819 n=BN_num_bytes(s->srp_ctx.A);
2820 s2n(n,p);
2821 BN_bn2bin(s->srp_ctx.A,p);
2822 n+=2;
2823 }
2824 else
2825 {
2826 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2827 goto err;
2828 }
2829 if (s->session->srp_username != NULL)
2830 OPENSSL_free(s->session->srp_username);
2831 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2832 if (s->session->srp_username == NULL)
2833 {
2834 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2835 ERR_R_MALLOC_FAILURE);
2836 goto err;
2837 }
2838
2839 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
2840 {
2841 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2842 goto err;
2843 }
2844 }
2845 #endif
2846 #ifndef OPENSSL_NO_PSK
2847 else if (alg_k & SSL_kPSK)
2848 {
2849 char identity[PSK_MAX_IDENTITY_LEN];
2850 unsigned char *t = NULL;
2851 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
2852 unsigned int pre_ms_len = 0, psk_len = 0;
2853 int psk_err = 1;
2854
2855 n = 0;
2856 if (s->psk_client_callback == NULL)
2857 {
2858 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2859 SSL_R_PSK_NO_CLIENT_CB);
2860 goto err;
2861 }
2862
2863 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
2864 identity, PSK_MAX_IDENTITY_LEN,
2865 psk_or_pre_ms, sizeof(psk_or_pre_ms));
2866 if (psk_len > PSK_MAX_PSK_LEN)
2867 {
2868 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2869 ERR_R_INTERNAL_ERROR);
2870 goto psk_err;
2871 }
2872 else if (psk_len == 0)
2873 {
2874 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2875 SSL_R_PSK_IDENTITY_NOT_FOUND);
2876 goto psk_err;
2877 }
2878
2879 /* create PSK pre_master_secret */
2880 pre_ms_len = 2+psk_len+2+psk_len;
2881 t = psk_or_pre_ms;
2882 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
2883 s2n(psk_len, t);
2884 memset(t, 0, psk_len);
2885 t+=psk_len;
2886 s2n(psk_len, t);
2887
2888 if (s->session->psk_identity_hint != NULL)
2889 OPENSSL_free(s->session->psk_identity_hint);
2890 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
2891 if (s->ctx->psk_identity_hint != NULL &&
2892 s->session->psk_identity_hint == NULL)
2893 {
2894 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2895 ERR_R_MALLOC_FAILURE);
2896 goto psk_err;
2897 }
2898
2899 if (s->session->psk_identity != NULL)
2900 OPENSSL_free(s->session->psk_identity);
2901 s->session->psk_identity = BUF_strdup(identity);
2902 if (s->session->psk_identity == NULL)
2903 {
2904 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2905 ERR_R_MALLOC_FAILURE);
2906 goto psk_err;
2907 }
2908
2909 s->session->master_key_length =
2910 s->method->ssl3_enc->generate_master_secret(s,
2911 s->session->master_key,
2912 psk_or_pre_ms, pre_ms_len);
2913 n = strlen(identity);
2914 s2n(n, p);
2915 memcpy(p, identity, n);
2916 n+=2;
2917 psk_err = 0;
2918 psk_err:
2919 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
2920 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
2921 if (psk_err != 0)
2922 {
2923 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2924 goto err;
2925 }
2926 }
2927 #endif
2928 else
2929 {
2930 ssl3_send_alert(s, SSL3_AL_FATAL,
2931 SSL_AD_HANDSHAKE_FAILURE);
2932 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2933 ERR_R_INTERNAL_ERROR);
2934 goto err;
2935 }
2936
2937 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
2938 l2n3(n,d);
2939
2940 s->state=SSL3_ST_CW_KEY_EXCH_B;
2941 /* number of bytes to write */
2942 s->init_num=n+4;
2943 s->init_off=0;
2944 }
2945
2946 /* SSL3_ST_CW_KEY_EXCH_B */
2947 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2948 err:
2949 #ifndef OPENSSL_NO_ECDH
2950 BN_CTX_free(bn_ctx);
2951 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2952 if (clnt_ecdh != NULL)
2953 EC_KEY_free(clnt_ecdh);
2954 EVP_PKEY_free(srvr_pub_pkey);
2955 #endif
2956 return(-1);
2957 }
2958
2959 int ssl3_send_client_verify(SSL *s)
2960 {
2961 unsigned char *p,*d;
2962 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
2963 EVP_PKEY *pkey;
2964 EVP_PKEY_CTX *pctx=NULL;
2965 EVP_MD_CTX mctx;
2966 unsigned u=0;
2967 unsigned long n;
2968 int j;
2969
2970 EVP_MD_CTX_init(&mctx);
2971
2972 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
2973 {
2974 d=(unsigned char *)s->init_buf->data;
2975 p= &(d[4]);
2976 pkey=s->cert->key->privatekey;
2977 /* Create context from key and test if sha1 is allowed as digest */
2978 pctx = EVP_PKEY_CTX_new(pkey,NULL);
2979 EVP_PKEY_sign_init(pctx);
2980 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
2981 {
2982 if (TLS1_get_version(s) < TLS1_2_VERSION)
2983 s->method->ssl3_enc->cert_verify_mac(s,
2984 NID_sha1,
2985 &(data[MD5_DIGEST_LENGTH]));
2986 }
2987 else
2988 {
2989 ERR_clear_error();
2990 }
2991 /* For TLS v1.2 send signature algorithm and signature
2992 * using agreed digest and cached handshake records.
2993 */
2994 if (TLS1_get_version(s) >= TLS1_2_VERSION)
2995 {
2996 long hdatalen = 0;
2997 void *hdata;
2998 const EVP_MD *md = s->cert->key->digest;
2999 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
3000 &hdata);
3001 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
3002 {
3003 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3004 ERR_R_INTERNAL_ERROR);
3005 goto err;
3006 }
3007 p += 2;
3008 #ifdef SSL_DEBUG
3009 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
3010 EVP_MD_name(md));
3011 #endif
3012 if (!EVP_SignInit_ex(&mctx, md, NULL)
3013 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3014 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
3015 {
3016 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3017 ERR_R_EVP_LIB);
3018 goto err;
3019 }
3020 s2n(u,p);
3021 n = u + 4;
3022 if (!ssl3_digest_cached_records(s))
3023 goto err;
3024 }
3025 else
3026 #ifndef OPENSSL_NO_RSA
3027 if (pkey->type == EVP_PKEY_RSA)
3028 {
3029 s->method->ssl3_enc->cert_verify_mac(s,
3030 NID_md5,
3031 &(data[0]));
3032 if (RSA_sign(NID_md5_sha1, data,
3033 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3034 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3035 {
3036 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3037 goto err;
3038 }
3039 s2n(u,p);
3040 n=u+2;
3041 }
3042 else
3043 #endif
3044 #ifndef OPENSSL_NO_DSA
3045 if (pkey->type == EVP_PKEY_DSA)
3046 {
3047 if (!DSA_sign(pkey->save_type,
3048 &(data[MD5_DIGEST_LENGTH]),
3049 SHA_DIGEST_LENGTH,&(p[2]),
3050 (unsigned int *)&j,pkey->pkey.dsa))
3051 {
3052 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3053 goto err;
3054 }
3055 s2n(j,p);
3056 n=j+2;
3057 }
3058 else
3059 #endif
3060 #ifndef OPENSSL_NO_ECDSA
3061 if (pkey->type == EVP_PKEY_EC)
3062 {
3063 if (!ECDSA_sign(pkey->save_type,
3064 &(data[MD5_DIGEST_LENGTH]),
3065 SHA_DIGEST_LENGTH,&(p[2]),
3066 (unsigned int *)&j,pkey->pkey.ec))
3067 {
3068 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3069 ERR_R_ECDSA_LIB);
3070 goto err;
3071 }
3072 s2n(j,p);
3073 n=j+2;
3074 }
3075 else
3076 #endif
3077 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3078 {
3079 unsigned char signbuf[64];
3080 int i;
3081 size_t sigsize=64;
3082 s->method->ssl3_enc->cert_verify_mac(s,
3083 NID_id_GostR3411_94,
3084 data);
3085 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3086 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3087 ERR_R_INTERNAL_ERROR);
3088 goto err;
3089 }
3090 for (i=63,j=0; i>=0; j++, i--) {
3091 p[2+j]=signbuf[i];
3092 }
3093 s2n(j,p);
3094 n=j+2;
3095 }
3096 else
3097 {
3098 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3099 goto err;
3100 }
3101 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
3102 l2n3(n,d);
3103
3104 s->state=SSL3_ST_CW_CERT_VRFY_B;
3105 s->init_num=(int)n+4;
3106 s->init_off=0;
3107 }
3108 EVP_MD_CTX_cleanup(&mctx);
3109 EVP_PKEY_CTX_free(pctx);
3110 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3111 err:
3112 EVP_MD_CTX_cleanup(&mctx);
3113 EVP_PKEY_CTX_free(pctx);
3114 return(-1);
3115 }
3116
3117 int ssl3_send_client_certificate(SSL *s)
3118 {
3119 X509 *x509=NULL;
3120 EVP_PKEY *pkey=NULL;
3121 int i;
3122 unsigned long l;
3123
3124 if (s->state == SSL3_ST_CW_CERT_A)
3125 {
3126 if ((s->cert == NULL) ||
3127 (s->cert->key->x509 == NULL) ||
3128 (s->cert->key->privatekey == NULL))
3129 s->state=SSL3_ST_CW_CERT_B;
3130 else
3131 s->state=SSL3_ST_CW_CERT_C;
3132 }
3133
3134 /* We need to get a client cert */
3135 if (s->state == SSL3_ST_CW_CERT_B)
3136 {
3137 /* If we get an error, we need to
3138 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3139 * We then get retied later */
3140 i=0;
3141 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3142 if (i < 0)
3143 {
3144 s->rwstate=SSL_X509_LOOKUP;
3145 return(-1);
3146 }
3147 s->rwstate=SSL_NOTHING;
3148 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3149 {
3150 s->state=SSL3_ST_CW_CERT_B;
3151 if ( !SSL_use_certificate(s,x509) ||
3152 !SSL_use_PrivateKey(s,pkey))
3153 i=0;
3154 }
3155 else if (i == 1)
3156 {
3157 i=0;
3158 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3159 }
3160
3161 if (x509 != NULL) X509_free(x509);
3162 if (pkey != NULL) EVP_PKEY_free(pkey);
3163 if (i == 0)
3164 {
3165 if (s->version == SSL3_VERSION)
3166 {
3167 s->s3->tmp.cert_req=0;
3168 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3169 return(1);
3170 }
3171 else
3172 {
3173 s->s3->tmp.cert_req=2;
3174 }
3175 }
3176
3177 /* Ok, we have a cert */
3178 s->state=SSL3_ST_CW_CERT_C;
3179 }
3180
3181 if (s->state == SSL3_ST_CW_CERT_C)
3182 {
3183 s->state=SSL3_ST_CW_CERT_D;
3184 l=ssl3_output_cert_chain(s,
3185 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
3186 s->init_num=(int)l;
3187 s->init_off=0;
3188 }
3189 /* SSL3_ST_CW_CERT_D */
3190 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3191 }
3192
3193 #define has_bits(i,m) (((i)&(m)) == (m))
3194
3195 int ssl3_check_cert_and_algorithm(SSL *s)
3196 {
3197 int i,idx;
3198 long alg_k,alg_a;
3199 EVP_PKEY *pkey=NULL;
3200 SESS_CERT *sc;
3201 #ifndef OPENSSL_NO_RSA
3202 RSA *rsa;
3203 #endif
3204 #ifndef OPENSSL_NO_DH
3205 DH *dh;
3206 #endif
3207
3208 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3209 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3210
3211 /* we don't have a certificate */
3212 if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3213 return(1);
3214
3215 sc=s->session->sess_cert;
3216 if (sc == NULL)
3217 {
3218 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3219 goto err;
3220 }
3221
3222 #ifndef OPENSSL_NO_RSA
3223 rsa=s->session->sess_cert->peer_rsa_tmp;
3224 #endif
3225 #ifndef OPENSSL_NO_DH
3226 dh=s->session->sess_cert->peer_dh_tmp;
3227 #endif
3228
3229 /* This is the passed certificate */
3230
3231 idx=sc->peer_cert_type;
3232 #ifndef OPENSSL_NO_ECDH
3233 if (idx == SSL_PKEY_ECC)
3234 {
3235 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3236 s) == 0)
3237 { /* check failed */
3238 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3239 goto f_err;
3240 }
3241 else
3242 {
3243 return 1;
3244 }
3245 }
3246 #endif
3247 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3248 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3249 EVP_PKEY_free(pkey);
3250
3251
3252 /* Check that we have a certificate if we require one */
3253 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3254 {
3255 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3256 goto f_err;
3257 }
3258 #ifndef OPENSSL_NO_DSA
3259 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3260 {
3261 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3262 goto f_err;
3263 }
3264 #endif
3265 #ifndef OPENSSL_NO_RSA
3266 if ((alg_k & SSL_kRSA) &&
3267 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3268 {
3269 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3270 goto f_err;
3271 }
3272 #endif
3273 #ifndef OPENSSL_NO_DH
3274 if ((alg_k & SSL_kEDH) &&
3275 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3276 {
3277 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3278 goto f_err;
3279 }
3280 else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3281 {
3282 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3283 goto f_err;
3284 }
3285 #ifndef OPENSSL_NO_DSA
3286 else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3287 {
3288 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3289 goto f_err;
3290 }
3291 #endif
3292 #endif
3293
3294 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3295 {
3296 #ifndef OPENSSL_NO_RSA
3297 if (alg_k & SSL_kRSA)
3298 {
3299 if (rsa == NULL
3300 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3301 {
3302 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3303 goto f_err;
3304 }
3305 }
3306 else
3307 #endif
3308 #ifndef OPENSSL_NO_DH
3309 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
3310 {
3311 if (dh == NULL
3312 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3313 {
3314 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3315 goto f_err;
3316 }
3317 }
3318 else
3319 #endif
3320 {
3321 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3322 goto f_err;
3323 }
3324 }
3325 return(1);
3326 f_err:
3327 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3328 err:
3329 return(0);
3330 }
3331
3332 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
3333 int ssl3_send_next_proto(SSL *s)
3334 {
3335 unsigned int len, padding_len;
3336 unsigned char *d;
3337
3338 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3339 {
3340 len = s->next_proto_negotiated_len;
3341 padding_len = 32 - ((len + 2) % 32);
3342 d = (unsigned char *)s->init_buf->data;
3343 d[4] = len;
3344 memcpy(d + 5, s->next_proto_negotiated, len);
3345 d[5 + len] = padding_len;
3346 memset(d + 6 + len, 0, padding_len);
3347 *(d++)=SSL3_MT_NEXT_PROTO;
3348 l2n3(2 + len + padding_len, d);
3349 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3350 s->init_num = 4 + 2 + len + padding_len;
3351 s->init_off = 0;
3352 }
3353
3354 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3355 }
3356 #endif /* !OPENSSL_NO_TLSEXT && !OPENSSL_NO_NEXTPROTONEG */
3357
3358 /* Check to see if handshake is full or resumed. Usually this is just a
3359 * case of checking to see if a cache hit has occurred. In the case of
3360 * session tickets we have to check the next message to be sure.
3361 */
3362
3363 #ifndef OPENSSL_NO_TLSEXT
3364 int ssl3_check_finished(SSL *s)
3365 {
3366 int ok;
3367 long n;
3368 /* If we have no ticket it cannot be a resumed session. */
3369 if (!s->session->tlsext_tick)
3370 return 1;
3371 /* this function is called when we really expect a Certificate
3372 * message, so permit appropriate message length */
3373 n=s->method->ssl_get_message(s,
3374 SSL3_ST_CR_CERT_A,
3375 SSL3_ST_CR_CERT_B,
3376 -1,
3377 s->max_cert_list,
3378 &ok);
3379 if (!ok) return((int)n);
3380 s->s3->tmp.reuse_message = 1;
3381 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3382 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3383 return 2;
3384
3385 return 1;
3386 }
3387 #endif
3388
3389 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3390 {
3391 int i = 0;
3392 #ifndef OPENSSL_NO_ENGINE
3393 if (s->ctx->client_cert_engine)
3394 {
3395 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3396 SSL_get_client_CA_list(s),
3397 px509, ppkey, NULL, NULL, NULL);
3398 if (i != 0)
3399 return i;
3400 }
3401 #endif
3402 if (s->ctx->client_cert_cb)
3403 i = s->ctx->client_cert_cb(s,px509,ppkey);
3404 return i;
3405 }