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[thirdparty/openssl.git] / ssl / s3_clnt.c
1 /* ssl/s3_clnt.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58 /* ====================================================================
59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 *
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
71 * distribution.
72 *
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 *
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
82 *
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 * acknowledgment:
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
105 *
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
109 *
110 */
111 /* ====================================================================
112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113 *
114 * Portions of the attached software ("Contribution") are developed by
115 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
116 *
117 * The Contribution is licensed pursuant to the OpenSSL open source
118 * license provided above.
119 *
120 * ECC cipher suite support in OpenSSL originally written by
121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
122 *
123 */
124 /* ====================================================================
125 * Copyright 2005 Nokia. All rights reserved.
126 *
127 * The portions of the attached software ("Contribution") is developed by
128 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
129 * license.
130 *
131 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
132 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
133 * support (see RFC 4279) to OpenSSL.
134 *
135 * No patent licenses or other rights except those expressly stated in
136 * the OpenSSL open source license shall be deemed granted or received
137 * expressly, by implication, estoppel, or otherwise.
138 *
139 * No assurances are provided by Nokia that the Contribution does not
140 * infringe the patent or other intellectual property rights of any third
141 * party or that the license provides you with all the necessary rights
142 * to make use of the Contribution.
143 *
144 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
145 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
146 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
147 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
148 * OTHERWISE.
149 */
150
151 #include <stdio.h>
152 #include "ssl_locl.h"
153 #include "kssl_lcl.h"
154 #include <openssl/buffer.h>
155 #include <openssl/rand.h>
156 #include <openssl/objects.h>
157 #include <openssl/evp.h>
158 #include <openssl/md5.h>
159 #ifdef OPENSSL_FIPS
160 #include <openssl/fips.h>
161 #endif
162 #ifndef OPENSSL_NO_DH
163 #include <openssl/dh.h>
164 #endif
165 #include <openssl/bn.h>
166 #ifndef OPENSSL_NO_ENGINE
167 #include <openssl/engine.h>
168 #endif
169
170 static const SSL_METHOD *ssl3_get_client_method(int ver);
171 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
172
173 static const SSL_METHOD *ssl3_get_client_method(int ver)
174 {
175 if (ver == SSL3_VERSION)
176 return(SSLv3_client_method());
177 else
178 return(NULL);
179 }
180
181 IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
182 ssl_undefined_function,
183 ssl3_connect,
184 ssl3_get_client_method)
185
186 int ssl3_connect(SSL *s)
187 {
188 BUF_MEM *buf=NULL;
189 unsigned long Time=(unsigned long)time(NULL);
190 void (*cb)(const SSL *ssl,int type,int val)=NULL;
191 int ret= -1;
192 int new_state,state,skip=0;
193
194 RAND_add(&Time,sizeof(Time),0);
195 ERR_clear_error();
196 clear_sys_error();
197
198 if (s->info_callback != NULL)
199 cb=s->info_callback;
200 else if (s->ctx->info_callback != NULL)
201 cb=s->ctx->info_callback;
202
203 s->in_handshake++;
204 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
205
206 #ifndef OPENSSL_NO_HEARTBEATS
207 /* If we're awaiting a HeartbeatResponse, pretend we
208 * already got and don't await it anymore, because
209 * Heartbeats don't make sense during handshakes anyway.
210 */
211 if (s->tlsext_hb_pending)
212 {
213 s->tlsext_hb_pending = 0;
214 s->tlsext_hb_seq++;
215 }
216 #endif
217
218 for (;;)
219 {
220 state=s->state;
221
222 switch(s->state)
223 {
224 case SSL_ST_RENEGOTIATE:
225 s->renegotiate=1;
226 s->state=SSL_ST_CONNECT;
227 s->ctx->stats.sess_connect_renegotiate++;
228 /* break */
229 case SSL_ST_BEFORE:
230 case SSL_ST_CONNECT:
231 case SSL_ST_BEFORE|SSL_ST_CONNECT:
232 case SSL_ST_OK|SSL_ST_CONNECT:
233
234 s->server=0;
235 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
236
237 if ((s->version & 0xff00 ) != 0x0300)
238 {
239 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
240 ret = -1;
241 goto end;
242 }
243
244 /* s->version=SSL3_VERSION; */
245 s->type=SSL_ST_CONNECT;
246
247 if (s->init_buf == NULL)
248 {
249 if ((buf=BUF_MEM_new()) == NULL)
250 {
251 ret= -1;
252 goto end;
253 }
254 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
255 {
256 ret= -1;
257 goto end;
258 }
259 s->init_buf=buf;
260 buf=NULL;
261 }
262
263 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
264
265 /* setup buffing BIO */
266 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
267
268 /* don't push the buffering BIO quite yet */
269
270 ssl3_init_finished_mac(s);
271
272 s->state=SSL3_ST_CW_CLNT_HELLO_A;
273 s->ctx->stats.sess_connect++;
274 s->init_num=0;
275 break;
276
277 case SSL3_ST_CW_CLNT_HELLO_A:
278 case SSL3_ST_CW_CLNT_HELLO_B:
279
280 s->shutdown=0;
281 ret=ssl3_client_hello(s);
282 if (ret <= 0) goto end;
283 s->state=SSL3_ST_CR_SRVR_HELLO_A;
284 s->init_num=0;
285
286 /* turn on buffering for the next lot of output */
287 if (s->bbio != s->wbio)
288 s->wbio=BIO_push(s->bbio,s->wbio);
289
290 break;
291
292 case SSL3_ST_CR_SRVR_HELLO_A:
293 case SSL3_ST_CR_SRVR_HELLO_B:
294 ret=ssl3_get_server_hello(s);
295 if (ret <= 0) goto end;
296
297 if (s->hit)
298 {
299 s->state=SSL3_ST_CR_FINISHED_A;
300 #ifndef OPENSSL_NO_TLSEXT
301 if (s->tlsext_ticket_expected)
302 {
303 /* receive renewed session ticket */
304 s->state=SSL3_ST_CR_SESSION_TICKET_A;
305 }
306 #endif
307 }
308 else
309 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
463 #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
464 s->state=SSL3_ST_CW_FINISHED_A;
465 #else
466 if (s->s3->next_proto_neg_seen)
467 s->state=SSL3_ST_CW_NEXT_PROTO_A;
468 else
469 s->state=SSL3_ST_CW_FINISHED_A;
470 #endif
471 s->init_num=0;
472
473 s->session->cipher=s->s3->tmp.new_cipher;
474 #ifdef OPENSSL_NO_COMP
475 s->session->compress_meth=0;
476 #else
477 if (s->s3->tmp.new_compression == NULL)
478 s->session->compress_meth=0;
479 else
480 s->session->compress_meth=
481 s->s3->tmp.new_compression->id;
482 #endif
483 if (!s->method->ssl3_enc->setup_key_block(s))
484 {
485 ret= -1;
486 goto end;
487 }
488
489 if (!s->method->ssl3_enc->change_cipher_state(s,
490 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
491 {
492 ret= -1;
493 goto end;
494 }
495
496 break;
497
498 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
499 case SSL3_ST_CW_NEXT_PROTO_A:
500 case SSL3_ST_CW_NEXT_PROTO_B:
501 ret=ssl3_send_next_proto(s);
502 if (ret <= 0) goto end;
503 s->state=SSL3_ST_CW_FINISHED_A;
504 break;
505 #endif
506
507 case SSL3_ST_CW_FINISHED_A:
508 case SSL3_ST_CW_FINISHED_B:
509 ret=ssl3_send_finished(s,
510 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
511 s->method->ssl3_enc->client_finished_label,
512 s->method->ssl3_enc->client_finished_label_len);
513 if (ret <= 0) goto end;
514 s->state=SSL3_ST_CW_FLUSH;
515
516 /* clear flags */
517 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
518 if (s->hit)
519 {
520 s->s3->tmp.next_state=SSL_ST_OK;
521 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
522 {
523 s->state=SSL_ST_OK;
524 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
525 s->s3->delay_buf_pop_ret=0;
526 }
527 }
528 else
529 {
530 #ifndef OPENSSL_NO_TLSEXT
531 /* Allow NewSessionTicket if ticket expected */
532 if (s->tlsext_ticket_expected)
533 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
534 else
535 #endif
536
537 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
538 }
539 s->init_num=0;
540 break;
541
542 #ifndef OPENSSL_NO_TLSEXT
543 case SSL3_ST_CR_SESSION_TICKET_A:
544 case SSL3_ST_CR_SESSION_TICKET_B:
545 ret=ssl3_get_new_session_ticket(s);
546 if (ret <= 0) goto end;
547 s->state=SSL3_ST_CR_FINISHED_A;
548 s->init_num=0;
549 break;
550
551 case SSL3_ST_CR_CERT_STATUS_A:
552 case SSL3_ST_CR_CERT_STATUS_B:
553 ret=ssl3_get_cert_status(s);
554 if (ret <= 0) goto end;
555 s->state=SSL3_ST_CR_KEY_EXCH_A;
556 s->init_num=0;
557 break;
558 #endif
559
560 case SSL3_ST_CR_FINISHED_A:
561 case SSL3_ST_CR_FINISHED_B:
562
563 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
564 SSL3_ST_CR_FINISHED_B);
565 if (ret <= 0) goto end;
566
567 if (s->hit)
568 s->state=SSL3_ST_CW_CHANGE_A;
569 else
570 s->state=SSL_ST_OK;
571 s->init_num=0;
572 break;
573
574 case SSL3_ST_CW_FLUSH:
575 s->rwstate=SSL_WRITING;
576 if (BIO_flush(s->wbio) <= 0)
577 {
578 ret= -1;
579 goto end;
580 }
581 s->rwstate=SSL_NOTHING;
582 s->state=s->s3->tmp.next_state;
583 break;
584
585 case SSL_ST_OK:
586 /* clean a few things up */
587 ssl3_cleanup_key_block(s);
588
589 if (s->init_buf != NULL)
590 {
591 BUF_MEM_free(s->init_buf);
592 s->init_buf=NULL;
593 }
594
595 /* If we are not 'joining' the last two packets,
596 * remove the buffering now */
597 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
598 ssl_free_wbio_buffer(s);
599 /* else do it later in ssl3_write */
600
601 s->init_num=0;
602 s->renegotiate=0;
603 s->new_session=0;
604
605 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
606 if (s->hit) s->ctx->stats.sess_hit++;
607
608 ret=1;
609 /* s->server=0; */
610 s->handshake_func=ssl3_connect;
611 s->ctx->stats.sess_connect_good++;
612
613 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
614
615 goto end;
616 /* break; */
617
618 default:
619 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
620 ret= -1;
621 goto end;
622 /* break; */
623 }
624
625 /* did we do anything */
626 if (!s->s3->tmp.reuse_message && !skip)
627 {
628 if (s->debug)
629 {
630 if ((ret=BIO_flush(s->wbio)) <= 0)
631 goto end;
632 }
633
634 if ((cb != NULL) && (s->state != state))
635 {
636 new_state=s->state;
637 s->state=state;
638 cb(s,SSL_CB_CONNECT_LOOP,1);
639 s->state=new_state;
640 }
641 }
642 skip=0;
643 }
644 end:
645 s->in_handshake--;
646 if (buf != NULL)
647 BUF_MEM_free(buf);
648 if (cb != NULL)
649 cb(s,SSL_CB_CONNECT_EXIT,ret);
650 return(ret);
651 }
652
653
654 int ssl3_client_hello(SSL *s)
655 {
656 unsigned char *buf;
657 unsigned char *p,*d;
658 int i;
659 unsigned long Time,l;
660 #ifndef OPENSSL_NO_COMP
661 int j;
662 SSL_COMP *comp;
663 #endif
664
665 buf=(unsigned char *)s->init_buf->data;
666 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
667 {
668 SSL_SESSION *sess = s->session;
669 if ((sess == NULL) ||
670 (sess->ssl_version != s->version) ||
671 #ifdef OPENSSL_NO_TLSEXT
672 !sess->session_id_length ||
673 #else
674 (!sess->session_id_length && !sess->tlsext_tick) ||
675 #endif
676 (sess->not_resumable))
677 {
678 if (!ssl_get_new_session(s,0))
679 goto err;
680 }
681 /* else use the pre-loaded session */
682
683 p=s->s3->client_random;
684 Time=(unsigned long)time(NULL); /* Time */
685 l2n(Time,p);
686 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
687 goto err;
688
689 /* Do the message type and length last */
690 d=p= &(buf[4]);
691
692 *(p++)=s->version>>8;
693 *(p++)=s->version&0xff;
694 s->client_version=s->version;
695
696 /* Random stuff */
697 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
698 p+=SSL3_RANDOM_SIZE;
699
700 /* Session ID */
701 if (s->new_session)
702 i=0;
703 else
704 i=s->session->session_id_length;
705 *(p++)=i;
706 if (i != 0)
707 {
708 if (i > (int)sizeof(s->session->session_id))
709 {
710 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
711 goto err;
712 }
713 memcpy(p,s->session->session_id,i);
714 p+=i;
715 }
716
717 /* Ciphers supported */
718 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
719 if (i == 0)
720 {
721 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
722 goto err;
723 }
724 s2n(i,p);
725 p+=i;
726
727 /* COMPRESSION */
728 #ifdef OPENSSL_NO_COMP
729 *(p++)=1;
730 #else
731
732 if ((s->options & SSL_OP_NO_COMPRESSION)
733 || !s->ctx->comp_methods)
734 j=0;
735 else
736 j=sk_SSL_COMP_num(s->ctx->comp_methods);
737 *(p++)=1+j;
738 for (i=0; i<j; i++)
739 {
740 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
741 *(p++)=comp->id;
742 }
743 #endif
744 *(p++)=0; /* Add the NULL method */
745
746 #ifndef OPENSSL_NO_TLSEXT
747 /* TLS extensions*/
748 if (ssl_prepare_clienthello_tlsext(s) <= 0)
749 {
750 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
751 goto err;
752 }
753 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
754 {
755 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
756 goto err;
757 }
758 #endif
759
760 l=(p-d);
761 d=buf;
762 *(d++)=SSL3_MT_CLIENT_HELLO;
763 l2n3(l,d);
764
765 s->state=SSL3_ST_CW_CLNT_HELLO_B;
766 /* number of bytes to write */
767 s->init_num=p-buf;
768 s->init_off=0;
769 }
770
771 /* SSL3_ST_CW_CLNT_HELLO_B */
772 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
773 err:
774 return(-1);
775 }
776
777 int ssl3_get_server_hello(SSL *s)
778 {
779 STACK_OF(SSL_CIPHER) *sk;
780 const SSL_CIPHER *c;
781 unsigned char *p,*d;
782 int i,al,ok;
783 unsigned int j;
784 long n;
785 #ifndef OPENSSL_NO_COMP
786 SSL_COMP *comp;
787 #endif
788
789 n=s->method->ssl_get_message(s,
790 SSL3_ST_CR_SRVR_HELLO_A,
791 SSL3_ST_CR_SRVR_HELLO_B,
792 -1,
793 20000, /* ?? */
794 &ok);
795
796 if (!ok) return((int)n);
797
798 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
799 {
800 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
801 {
802 if ( s->d1->send_cookie == 0)
803 {
804 s->s3->tmp.reuse_message = 1;
805 return 1;
806 }
807 else /* already sent a cookie */
808 {
809 al=SSL_AD_UNEXPECTED_MESSAGE;
810 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
811 goto f_err;
812 }
813 }
814 }
815
816 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
817 {
818 al=SSL_AD_UNEXPECTED_MESSAGE;
819 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
820 goto f_err;
821 }
822
823 d=p=(unsigned char *)s->init_msg;
824
825 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
826 {
827 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
828 s->version=(s->version&0xff00)|p[1];
829 al=SSL_AD_PROTOCOL_VERSION;
830 goto f_err;
831 }
832 p+=2;
833
834 /* load the server hello data */
835 /* load the server random */
836 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
837 p+=SSL3_RANDOM_SIZE;
838
839 /* get the session-id */
840 j= *(p++);
841
842 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
843 {
844 al=SSL_AD_ILLEGAL_PARAMETER;
845 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
846 goto f_err;
847 }
848
849 #ifndef OPENSSL_NO_TLSEXT
850 /* check if we want to resume the session based on external pre-shared secret */
851 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
852 {
853 SSL_CIPHER *pref_cipher=NULL;
854 s->session->master_key_length=sizeof(s->session->master_key);
855 if (s->tls_session_secret_cb(s, s->session->master_key,
856 &s->session->master_key_length,
857 NULL, &pref_cipher,
858 s->tls_session_secret_cb_arg))
859 {
860 s->session->cipher = pref_cipher ?
861 pref_cipher : ssl_get_cipher_by_char(s, p+j);
862 }
863 }
864 #endif /* OPENSSL_NO_TLSEXT */
865
866 if (j != 0 && j == s->session->session_id_length
867 && memcmp(p,s->session->session_id,j) == 0)
868 {
869 if(s->sid_ctx_length != s->session->sid_ctx_length
870 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
871 {
872 /* actually a client application bug */
873 al=SSL_AD_ILLEGAL_PARAMETER;
874 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
875 goto f_err;
876 }
877 s->hit=1;
878 }
879 else /* a miss or crap from the other end */
880 {
881 /* If we were trying for session-id reuse, make a new
882 * SSL_SESSION so we don't stuff up other people */
883 s->hit=0;
884 if (s->session->session_id_length > 0)
885 {
886 if (!ssl_get_new_session(s,0))
887 {
888 al=SSL_AD_INTERNAL_ERROR;
889 goto f_err;
890 }
891 }
892 s->session->session_id_length=j;
893 memcpy(s->session->session_id,p,j); /* j could be 0 */
894 }
895 p+=j;
896 c=ssl_get_cipher_by_char(s,p);
897 if (c == NULL)
898 {
899 /* unknown cipher */
900 al=SSL_AD_ILLEGAL_PARAMETER;
901 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
902 goto f_err;
903 }
904 /* TLS v1.2 only ciphersuites require v1.2 or later */
905 if ((c->algorithm_ssl & SSL_TLSV1_2) &&
906 (TLS1_get_version(s) < TLS1_2_VERSION))
907 {
908 al=SSL_AD_ILLEGAL_PARAMETER;
909 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
910 goto f_err;
911 }
912 p+=ssl_put_cipher_by_char(s,NULL,NULL);
913
914 sk=ssl_get_ciphers_by_id(s);
915 i=sk_SSL_CIPHER_find(sk,c);
916 if (i < 0)
917 {
918 /* we did not say we would use this cipher */
919 al=SSL_AD_ILLEGAL_PARAMETER;
920 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
921 goto f_err;
922 }
923
924 /* Depending on the session caching (internal/external), the cipher
925 and/or cipher_id values may not be set. Make sure that
926 cipher_id is set and use it for comparison. */
927 if (s->session->cipher)
928 s->session->cipher_id = s->session->cipher->id;
929 if (s->hit && (s->session->cipher_id != c->id))
930 {
931 /* Workaround is now obsolete */
932 #if 0
933 if (!(s->options &
934 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
935 #endif
936 {
937 al=SSL_AD_ILLEGAL_PARAMETER;
938 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
939 goto f_err;
940 }
941 }
942 s->s3->tmp.new_cipher=c;
943 /* Don't digest cached records if TLS v1.2: we may need them for
944 * client authentication.
945 */
946 if (TLS1_get_version(s) < TLS1_2_VERSION && !ssl3_digest_cached_records(s))
947 goto f_err;
948 /* lets get the compression algorithm */
949 /* COMPRESSION */
950 #ifdef OPENSSL_NO_COMP
951 if (*(p++) != 0)
952 {
953 al=SSL_AD_ILLEGAL_PARAMETER;
954 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
955 goto f_err;
956 }
957 /* If compression is disabled we'd better not try to resume a session
958 * using compression.
959 */
960 if (s->session->compress_meth != 0)
961 {
962 al=SSL_AD_INTERNAL_ERROR;
963 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
964 goto f_err;
965 }
966 #else
967 j= *(p++);
968 if (s->hit && j != s->session->compress_meth)
969 {
970 al=SSL_AD_ILLEGAL_PARAMETER;
971 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
972 goto f_err;
973 }
974 if (j == 0)
975 comp=NULL;
976 else if (s->options & SSL_OP_NO_COMPRESSION)
977 {
978 al=SSL_AD_ILLEGAL_PARAMETER;
979 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
980 goto f_err;
981 }
982 else
983 comp=ssl3_comp_find(s->ctx->comp_methods,j);
984
985 if ((j != 0) && (comp == NULL))
986 {
987 al=SSL_AD_ILLEGAL_PARAMETER;
988 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
989 goto f_err;
990 }
991 else
992 {
993 s->s3->tmp.new_compression=comp;
994 }
995 #endif
996
997 #ifndef OPENSSL_NO_TLSEXT
998 /* TLS extensions*/
999 if (s->version >= SSL3_VERSION)
1000 {
1001 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al))
1002 {
1003 /* 'al' set by ssl_parse_serverhello_tlsext */
1004 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1005 goto f_err;
1006 }
1007 if (ssl_check_serverhello_tlsext(s) <= 0)
1008 {
1009 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT);
1010 goto err;
1011 }
1012 }
1013 #endif
1014
1015 if (p != (d+n))
1016 {
1017 /* wrong packet length */
1018 al=SSL_AD_DECODE_ERROR;
1019 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1020 goto f_err;
1021 }
1022
1023 return(1);
1024 f_err:
1025 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1026 err:
1027 return(-1);
1028 }
1029
1030 int ssl3_get_server_certificate(SSL *s)
1031 {
1032 int al,i,ok,ret= -1;
1033 unsigned long n,nc,llen,l;
1034 X509 *x=NULL;
1035 const unsigned char *q,*p;
1036 unsigned char *d;
1037 STACK_OF(X509) *sk=NULL;
1038 SESS_CERT *sc;
1039 EVP_PKEY *pkey=NULL;
1040 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1041
1042 n=s->method->ssl_get_message(s,
1043 SSL3_ST_CR_CERT_A,
1044 SSL3_ST_CR_CERT_B,
1045 -1,
1046 s->max_cert_list,
1047 &ok);
1048
1049 if (!ok) return((int)n);
1050
1051 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1052 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1053 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1054 {
1055 s->s3->tmp.reuse_message=1;
1056 return(1);
1057 }
1058
1059 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1060 {
1061 al=SSL_AD_UNEXPECTED_MESSAGE;
1062 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1063 goto f_err;
1064 }
1065 p=d=(unsigned char *)s->init_msg;
1066
1067 if ((sk=sk_X509_new_null()) == NULL)
1068 {
1069 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1070 goto err;
1071 }
1072
1073 n2l3(p,llen);
1074 if (llen+3 != n)
1075 {
1076 al=SSL_AD_DECODE_ERROR;
1077 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1078 goto f_err;
1079 }
1080 for (nc=0; nc<llen; )
1081 {
1082 n2l3(p,l);
1083 if ((l+nc+3) > llen)
1084 {
1085 al=SSL_AD_DECODE_ERROR;
1086 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1087 goto f_err;
1088 }
1089
1090 q=p;
1091 x=d2i_X509(NULL,&q,l);
1092 if (x == NULL)
1093 {
1094 al=SSL_AD_BAD_CERTIFICATE;
1095 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1096 goto f_err;
1097 }
1098 if (q != (p+l))
1099 {
1100 al=SSL_AD_DECODE_ERROR;
1101 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1102 goto f_err;
1103 }
1104 if (!sk_X509_push(sk,x))
1105 {
1106 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1107 goto err;
1108 }
1109 x=NULL;
1110 nc+=l+3;
1111 p=q;
1112 }
1113
1114 i=ssl_verify_cert_chain(s,sk);
1115 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1116 #ifndef OPENSSL_NO_KRB5
1117 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1118 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1119 #endif /* OPENSSL_NO_KRB5 */
1120 )
1121 {
1122 al=ssl_verify_alarm_type(s->verify_result);
1123 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1124 goto f_err;
1125 }
1126 ERR_clear_error(); /* but we keep s->verify_result */
1127
1128 sc=ssl_sess_cert_new();
1129 if (sc == NULL) goto err;
1130
1131 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1132 s->session->sess_cert=sc;
1133
1134 sc->cert_chain=sk;
1135 /* Inconsistency alert: cert_chain does include the peer's
1136 * certificate, which we don't include in s3_srvr.c */
1137 x=sk_X509_value(sk,0);
1138 sk=NULL;
1139 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1140
1141 pkey=X509_get_pubkey(x);
1142
1143 /* VRS: allow null cert if auth == KRB5 */
1144 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1145 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1146 ? 0 : 1;
1147
1148 #ifdef KSSL_DEBUG
1149 printf("pkey,x = %p, %p\n", pkey,x);
1150 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1151 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1152 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1153 #endif /* KSSL_DEBUG */
1154
1155 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1156 {
1157 x=NULL;
1158 al=SSL3_AL_FATAL;
1159 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1160 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1161 goto f_err;
1162 }
1163
1164 i=ssl_cert_type(x,pkey);
1165 if (need_cert && i < 0)
1166 {
1167 x=NULL;
1168 al=SSL3_AL_FATAL;
1169 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1170 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1171 goto f_err;
1172 }
1173
1174 if (need_cert)
1175 {
1176 sc->peer_cert_type=i;
1177 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1178 /* Why would the following ever happen?
1179 * We just created sc a couple of lines ago. */
1180 if (sc->peer_pkeys[i].x509 != NULL)
1181 X509_free(sc->peer_pkeys[i].x509);
1182 sc->peer_pkeys[i].x509=x;
1183 sc->peer_key= &(sc->peer_pkeys[i]);
1184
1185 if (s->session->peer != NULL)
1186 X509_free(s->session->peer);
1187 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1188 s->session->peer=x;
1189 }
1190 else
1191 {
1192 sc->peer_cert_type=i;
1193 sc->peer_key= NULL;
1194
1195 if (s->session->peer != NULL)
1196 X509_free(s->session->peer);
1197 s->session->peer=NULL;
1198 }
1199 s->session->verify_result = s->verify_result;
1200
1201 x=NULL;
1202 ret=1;
1203
1204 if (0)
1205 {
1206 f_err:
1207 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1208 }
1209 err:
1210 EVP_PKEY_free(pkey);
1211 X509_free(x);
1212 sk_X509_pop_free(sk,X509_free);
1213 return(ret);
1214 }
1215
1216 int ssl3_get_key_exchange(SSL *s)
1217 {
1218 #ifndef OPENSSL_NO_RSA
1219 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1220 #endif
1221 EVP_MD_CTX md_ctx;
1222 unsigned char *param,*p;
1223 int al,i,j,param_len,ok;
1224 long n,alg_k,alg_a;
1225 EVP_PKEY *pkey=NULL;
1226 const EVP_MD *md = NULL;
1227 #ifndef OPENSSL_NO_RSA
1228 RSA *rsa=NULL;
1229 #endif
1230 #ifndef OPENSSL_NO_DH
1231 DH *dh=NULL;
1232 #endif
1233 #ifndef OPENSSL_NO_ECDH
1234 EC_KEY *ecdh = NULL;
1235 BN_CTX *bn_ctx = NULL;
1236 EC_POINT *srvr_ecpoint = NULL;
1237 int curve_nid = 0;
1238 int encoded_pt_len = 0;
1239 #endif
1240
1241 /* use same message size as in ssl3_get_certificate_request()
1242 * as ServerKeyExchange message may be skipped */
1243 n=s->method->ssl_get_message(s,
1244 SSL3_ST_CR_KEY_EXCH_A,
1245 SSL3_ST_CR_KEY_EXCH_B,
1246 -1,
1247 s->max_cert_list,
1248 &ok);
1249 if (!ok) return((int)n);
1250
1251 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1252 {
1253 #ifndef OPENSSL_NO_PSK
1254 /* In plain PSK ciphersuite, ServerKeyExchange can be
1255 omitted if no identity hint is sent. Set
1256 session->sess_cert anyway to avoid problems
1257 later.*/
1258 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1259 {
1260 s->session->sess_cert=ssl_sess_cert_new();
1261 if (s->ctx->psk_identity_hint)
1262 OPENSSL_free(s->ctx->psk_identity_hint);
1263 s->ctx->psk_identity_hint = NULL;
1264 }
1265 #endif
1266 s->s3->tmp.reuse_message=1;
1267 return(1);
1268 }
1269
1270 param=p=(unsigned char *)s->init_msg;
1271 if (s->session->sess_cert != NULL)
1272 {
1273 #ifndef OPENSSL_NO_RSA
1274 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1275 {
1276 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1277 s->session->sess_cert->peer_rsa_tmp=NULL;
1278 }
1279 #endif
1280 #ifndef OPENSSL_NO_DH
1281 if (s->session->sess_cert->peer_dh_tmp)
1282 {
1283 DH_free(s->session->sess_cert->peer_dh_tmp);
1284 s->session->sess_cert->peer_dh_tmp=NULL;
1285 }
1286 #endif
1287 #ifndef OPENSSL_NO_ECDH
1288 if (s->session->sess_cert->peer_ecdh_tmp)
1289 {
1290 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1291 s->session->sess_cert->peer_ecdh_tmp=NULL;
1292 }
1293 #endif
1294 }
1295 else
1296 {
1297 s->session->sess_cert=ssl_sess_cert_new();
1298 }
1299
1300 param_len=0;
1301 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1302 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1303 EVP_MD_CTX_init(&md_ctx);
1304
1305 #ifndef OPENSSL_NO_PSK
1306 if (alg_k & SSL_kPSK)
1307 {
1308 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1309
1310 al=SSL_AD_HANDSHAKE_FAILURE;
1311 n2s(p,i);
1312 param_len=i+2;
1313 /* Store PSK identity hint for later use, hint is used
1314 * in ssl3_send_client_key_exchange. Assume that the
1315 * maximum length of a PSK identity hint can be as
1316 * long as the maximum length of a PSK identity. */
1317 if (i > PSK_MAX_IDENTITY_LEN)
1318 {
1319 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1320 SSL_R_DATA_LENGTH_TOO_LONG);
1321 goto f_err;
1322 }
1323 if (param_len > n)
1324 {
1325 al=SSL_AD_DECODE_ERROR;
1326 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1327 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1328 goto f_err;
1329 }
1330 /* If received PSK identity hint contains NULL
1331 * characters, the hint is truncated from the first
1332 * NULL. p may not be ending with NULL, so create a
1333 * NULL-terminated string. */
1334 memcpy(tmp_id_hint, p, i);
1335 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1336 if (s->ctx->psk_identity_hint != NULL)
1337 OPENSSL_free(s->ctx->psk_identity_hint);
1338 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1339 if (s->ctx->psk_identity_hint == NULL)
1340 {
1341 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1342 goto f_err;
1343 }
1344
1345 p+=i;
1346 n-=param_len;
1347 }
1348 else
1349 #endif /* !OPENSSL_NO_PSK */
1350 #ifndef OPENSSL_NO_SRP
1351 if (alg_k & SSL_kSRP)
1352 {
1353 n2s(p,i);
1354 param_len=i+2;
1355 if (param_len > n)
1356 {
1357 al=SSL_AD_DECODE_ERROR;
1358 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1359 goto f_err;
1360 }
1361 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1362 {
1363 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1364 goto err;
1365 }
1366 p+=i;
1367
1368 n2s(p,i);
1369 param_len+=i+2;
1370 if (param_len > n)
1371 {
1372 al=SSL_AD_DECODE_ERROR;
1373 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1374 goto f_err;
1375 }
1376 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1377 {
1378 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1379 goto err;
1380 }
1381 p+=i;
1382
1383 i = (unsigned int)(p[0]);
1384 p++;
1385 param_len+=i+1;
1386 if (param_len > n)
1387 {
1388 al=SSL_AD_DECODE_ERROR;
1389 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1390 goto f_err;
1391 }
1392 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1393 {
1394 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1395 goto err;
1396 }
1397 p+=i;
1398
1399 n2s(p,i);
1400 param_len+=i+2;
1401 if (param_len > n)
1402 {
1403 al=SSL_AD_DECODE_ERROR;
1404 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1405 goto f_err;
1406 }
1407 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1408 {
1409 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1410 goto err;
1411 }
1412 p+=i;
1413 n-=param_len;
1414
1415 /* We must check if there is a certificate */
1416 #ifndef OPENSSL_NO_RSA
1417 if (alg_a & SSL_aRSA)
1418 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1419 #else
1420 if (0)
1421 ;
1422 #endif
1423 #ifndef OPENSSL_NO_DSA
1424 else if (alg_a & SSL_aDSS)
1425 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1426 #endif
1427 }
1428 else
1429 #endif /* !OPENSSL_NO_SRP */
1430 #ifndef OPENSSL_NO_RSA
1431 if (alg_k & SSL_kRSA)
1432 {
1433 if ((rsa=RSA_new()) == NULL)
1434 {
1435 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1436 goto err;
1437 }
1438 n2s(p,i);
1439 param_len=i+2;
1440 if (param_len > n)
1441 {
1442 al=SSL_AD_DECODE_ERROR;
1443 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1444 goto f_err;
1445 }
1446 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1447 {
1448 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1449 goto err;
1450 }
1451 p+=i;
1452
1453 n2s(p,i);
1454 param_len+=i+2;
1455 if (param_len > n)
1456 {
1457 al=SSL_AD_DECODE_ERROR;
1458 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1459 goto f_err;
1460 }
1461 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1462 {
1463 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1464 goto err;
1465 }
1466 p+=i;
1467 n-=param_len;
1468
1469 /* this should be because we are using an export cipher */
1470 if (alg_a & SSL_aRSA)
1471 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1472 else
1473 {
1474 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1475 goto err;
1476 }
1477 s->session->sess_cert->peer_rsa_tmp=rsa;
1478 rsa=NULL;
1479 }
1480 #else /* OPENSSL_NO_RSA */
1481 if (0)
1482 ;
1483 #endif
1484 #ifndef OPENSSL_NO_DH
1485 else if (alg_k & SSL_kEDH)
1486 {
1487 if ((dh=DH_new()) == NULL)
1488 {
1489 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1490 goto err;
1491 }
1492 n2s(p,i);
1493 param_len=i+2;
1494 if (param_len > n)
1495 {
1496 al=SSL_AD_DECODE_ERROR;
1497 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1498 goto f_err;
1499 }
1500 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1501 {
1502 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1503 goto err;
1504 }
1505 p+=i;
1506
1507 n2s(p,i);
1508 param_len+=i+2;
1509 if (param_len > n)
1510 {
1511 al=SSL_AD_DECODE_ERROR;
1512 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1513 goto f_err;
1514 }
1515 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1516 {
1517 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1518 goto err;
1519 }
1520 p+=i;
1521
1522 n2s(p,i);
1523 param_len+=i+2;
1524 if (param_len > n)
1525 {
1526 al=SSL_AD_DECODE_ERROR;
1527 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1528 goto f_err;
1529 }
1530 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1531 {
1532 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1533 goto err;
1534 }
1535 p+=i;
1536 n-=param_len;
1537
1538 #ifndef OPENSSL_NO_RSA
1539 if (alg_a & SSL_aRSA)
1540 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1541 #else
1542 if (0)
1543 ;
1544 #endif
1545 #ifndef OPENSSL_NO_DSA
1546 else if (alg_a & SSL_aDSS)
1547 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1548 #endif
1549 /* else anonymous DH, so no certificate or pkey. */
1550
1551 s->session->sess_cert->peer_dh_tmp=dh;
1552 dh=NULL;
1553 }
1554 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1555 {
1556 al=SSL_AD_ILLEGAL_PARAMETER;
1557 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1558 goto f_err;
1559 }
1560 #endif /* !OPENSSL_NO_DH */
1561
1562 #ifndef OPENSSL_NO_ECDH
1563 else if (alg_k & SSL_kEECDH)
1564 {
1565 EC_GROUP *ngroup;
1566 const EC_GROUP *group;
1567
1568 if ((ecdh=EC_KEY_new()) == NULL)
1569 {
1570 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1571 goto err;
1572 }
1573
1574 /* Extract elliptic curve parameters and the
1575 * server's ephemeral ECDH public key.
1576 * Keep accumulating lengths of various components in
1577 * param_len and make sure it never exceeds n.
1578 */
1579
1580 /* XXX: For now we only support named (not generic) curves
1581 * and the ECParameters in this case is just three bytes.
1582 */
1583 param_len=3;
1584 if ((param_len > n) ||
1585 (*p != NAMED_CURVE_TYPE) ||
1586 ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0))
1587 {
1588 al=SSL_AD_INTERNAL_ERROR;
1589 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1590 goto f_err;
1591 }
1592
1593 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1594 if (ngroup == NULL)
1595 {
1596 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1597 goto err;
1598 }
1599 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1600 {
1601 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1602 goto err;
1603 }
1604 EC_GROUP_free(ngroup);
1605
1606 group = EC_KEY_get0_group(ecdh);
1607
1608 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1609 (EC_GROUP_get_degree(group) > 163))
1610 {
1611 al=SSL_AD_EXPORT_RESTRICTION;
1612 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1613 goto f_err;
1614 }
1615
1616 p+=3;
1617
1618 /* Next, get the encoded ECPoint */
1619 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1620 ((bn_ctx = BN_CTX_new()) == NULL))
1621 {
1622 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1623 goto err;
1624 }
1625
1626 encoded_pt_len = *p; /* length of encoded point */
1627 p+=1;
1628 param_len += (1 + encoded_pt_len);
1629 if ((param_len > n) ||
1630 (EC_POINT_oct2point(group, srvr_ecpoint,
1631 p, encoded_pt_len, bn_ctx) == 0))
1632 {
1633 al=SSL_AD_DECODE_ERROR;
1634 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1635 goto f_err;
1636 }
1637
1638 n-=param_len;
1639 p+=encoded_pt_len;
1640
1641 /* The ECC/TLS specification does not mention
1642 * the use of DSA to sign ECParameters in the server
1643 * key exchange message. We do support RSA and ECDSA.
1644 */
1645 if (0) ;
1646 #ifndef OPENSSL_NO_RSA
1647 else if (alg_a & SSL_aRSA)
1648 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1649 #endif
1650 #ifndef OPENSSL_NO_ECDSA
1651 else if (alg_a & SSL_aECDSA)
1652 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1653 #endif
1654 /* else anonymous ECDH, so no certificate or pkey. */
1655 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1656 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1657 ecdh=NULL;
1658 BN_CTX_free(bn_ctx);
1659 bn_ctx = NULL;
1660 EC_POINT_free(srvr_ecpoint);
1661 srvr_ecpoint = NULL;
1662 }
1663 else if (alg_k)
1664 {
1665 al=SSL_AD_UNEXPECTED_MESSAGE;
1666 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1667 goto f_err;
1668 }
1669 #endif /* !OPENSSL_NO_ECDH */
1670
1671
1672 /* p points to the next byte, there are 'n' bytes left */
1673
1674 /* if it was signed, check the signature */
1675 if (pkey != NULL)
1676 {
1677 if (TLS1_get_version(s) >= TLS1_2_VERSION)
1678 {
1679 int sigalg = tls12_get_sigid(pkey);
1680 /* Should never happen */
1681 if (sigalg == -1)
1682 {
1683 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1684 goto err;
1685 }
1686 /* Check key type is consistent with signature */
1687 if (sigalg != (int)p[1])
1688 {
1689 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_TYPE);
1690 al=SSL_AD_DECODE_ERROR;
1691 goto f_err;
1692 }
1693 md = tls12_get_hash(p[0]);
1694 if (md == NULL)
1695 {
1696 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNKNOWN_DIGEST);
1697 al=SSL_AD_DECODE_ERROR;
1698 goto f_err;
1699 }
1700 #ifdef SSL_DEBUG
1701 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1702 #endif
1703 p += 2;
1704 n -= 2;
1705 }
1706 else
1707 md = EVP_sha1();
1708
1709 n2s(p,i);
1710 n-=2;
1711 j=EVP_PKEY_size(pkey);
1712
1713 if ((i != n) || (n > j) || (n <= 0))
1714 {
1715 /* wrong packet length */
1716 al=SSL_AD_DECODE_ERROR;
1717 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1718 goto f_err;
1719 }
1720
1721 #ifndef OPENSSL_NO_RSA
1722 if (pkey->type == EVP_PKEY_RSA && TLS1_get_version(s) < TLS1_2_VERSION)
1723 {
1724 int num;
1725
1726 j=0;
1727 q=md_buf;
1728 for (num=2; num > 0; num--)
1729 {
1730 EVP_MD_CTX_set_flags(&md_ctx,
1731 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1732 EVP_DigestInit_ex(&md_ctx,(num == 2)
1733 ?s->ctx->md5:s->ctx->sha1, NULL);
1734 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1735 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1736 EVP_DigestUpdate(&md_ctx,param,param_len);
1737 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1738 q+=i;
1739 j+=i;
1740 }
1741 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1742 pkey->pkey.rsa);
1743 if (i < 0)
1744 {
1745 al=SSL_AD_DECRYPT_ERROR;
1746 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1747 goto f_err;
1748 }
1749 if (i == 0)
1750 {
1751 /* bad signature */
1752 al=SSL_AD_DECRYPT_ERROR;
1753 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1754 goto f_err;
1755 }
1756 }
1757 else
1758 #endif
1759 {
1760 EVP_VerifyInit_ex(&md_ctx, md, NULL);
1761 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1762 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1763 EVP_VerifyUpdate(&md_ctx,param,param_len);
1764 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1765 {
1766 /* bad signature */
1767 al=SSL_AD_DECRYPT_ERROR;
1768 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1769 goto f_err;
1770 }
1771 }
1772 }
1773 else
1774 {
1775 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
1776 /* aNULL or kPSK do not need public keys */
1777 {
1778 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1779 goto err;
1780 }
1781 /* still data left over */
1782 if (n != 0)
1783 {
1784 al=SSL_AD_DECODE_ERROR;
1785 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1786 goto f_err;
1787 }
1788 }
1789 EVP_PKEY_free(pkey);
1790 EVP_MD_CTX_cleanup(&md_ctx);
1791 return(1);
1792 f_err:
1793 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1794 err:
1795 EVP_PKEY_free(pkey);
1796 #ifndef OPENSSL_NO_RSA
1797 if (rsa != NULL)
1798 RSA_free(rsa);
1799 #endif
1800 #ifndef OPENSSL_NO_DH
1801 if (dh != NULL)
1802 DH_free(dh);
1803 #endif
1804 #ifndef OPENSSL_NO_ECDH
1805 BN_CTX_free(bn_ctx);
1806 EC_POINT_free(srvr_ecpoint);
1807 if (ecdh != NULL)
1808 EC_KEY_free(ecdh);
1809 #endif
1810 EVP_MD_CTX_cleanup(&md_ctx);
1811 return(-1);
1812 }
1813
1814 int ssl3_get_certificate_request(SSL *s)
1815 {
1816 int ok,ret=0;
1817 unsigned long n,nc,l;
1818 unsigned int llen, ctype_num,i;
1819 X509_NAME *xn=NULL;
1820 const unsigned char *p,*q;
1821 unsigned char *d;
1822 STACK_OF(X509_NAME) *ca_sk=NULL;
1823
1824 n=s->method->ssl_get_message(s,
1825 SSL3_ST_CR_CERT_REQ_A,
1826 SSL3_ST_CR_CERT_REQ_B,
1827 -1,
1828 s->max_cert_list,
1829 &ok);
1830
1831 if (!ok) return((int)n);
1832
1833 s->s3->tmp.cert_req=0;
1834
1835 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1836 {
1837 s->s3->tmp.reuse_message=1;
1838 /* If we get here we don't need any cached handshake records
1839 * as we wont be doing client auth.
1840 */
1841 if (s->s3->handshake_buffer)
1842 {
1843 if (!ssl3_digest_cached_records(s))
1844 goto err;
1845 }
1846 return(1);
1847 }
1848
1849 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1850 {
1851 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1852 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1853 goto err;
1854 }
1855
1856 /* TLS does not like anon-DH with client cert */
1857 if (s->version > SSL3_VERSION)
1858 {
1859 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
1860 {
1861 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1862 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1863 goto err;
1864 }
1865 }
1866
1867 p=d=(unsigned char *)s->init_msg;
1868
1869 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1870 {
1871 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1872 goto err;
1873 }
1874
1875 /* get the certificate types */
1876 ctype_num= *(p++);
1877 if (ctype_num > SSL3_CT_NUMBER)
1878 ctype_num=SSL3_CT_NUMBER;
1879 for (i=0; i<ctype_num; i++)
1880 s->s3->tmp.ctype[i]= p[i];
1881 p+=ctype_num;
1882 if (TLS1_get_version(s) >= TLS1_2_VERSION)
1883 {
1884 n2s(p, llen);
1885 /* Check we have enough room for signature algorithms and
1886 * following length value.
1887 */
1888 if ((unsigned long)(p - d + llen + 2) > n)
1889 {
1890 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1891 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
1892 goto err;
1893 }
1894 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen))
1895 {
1896 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1897 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
1898 goto err;
1899 }
1900 p += llen;
1901 }
1902
1903 /* get the CA RDNs */
1904 n2s(p,llen);
1905 #if 0
1906 {
1907 FILE *out;
1908 out=fopen("/tmp/vsign.der","w");
1909 fwrite(p,1,llen,out);
1910 fclose(out);
1911 }
1912 #endif
1913
1914 if ((unsigned long)(p - d + llen) != n)
1915 {
1916 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1917 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1918 goto err;
1919 }
1920
1921 for (nc=0; nc<llen; )
1922 {
1923 n2s(p,l);
1924 if ((l+nc+2) > llen)
1925 {
1926 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1927 goto cont; /* netscape bugs */
1928 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1929 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1930 goto err;
1931 }
1932
1933 q=p;
1934
1935 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1936 {
1937 /* If netscape tolerance is on, ignore errors */
1938 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1939 goto cont;
1940 else
1941 {
1942 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1943 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1944 goto err;
1945 }
1946 }
1947
1948 if (q != (p+l))
1949 {
1950 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1951 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1952 goto err;
1953 }
1954 if (!sk_X509_NAME_push(ca_sk,xn))
1955 {
1956 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1957 goto err;
1958 }
1959
1960 p+=l;
1961 nc+=l+2;
1962 }
1963
1964 if (0)
1965 {
1966 cont:
1967 ERR_clear_error();
1968 }
1969
1970 /* we should setup a certificate to return.... */
1971 s->s3->tmp.cert_req=1;
1972 s->s3->tmp.ctype_num=ctype_num;
1973 if (s->s3->tmp.ca_names != NULL)
1974 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1975 s->s3->tmp.ca_names=ca_sk;
1976 ca_sk=NULL;
1977
1978 ret=1;
1979 err:
1980 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1981 return(ret);
1982 }
1983
1984 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1985 {
1986 return(X509_NAME_cmp(*a,*b));
1987 }
1988 #ifndef OPENSSL_NO_TLSEXT
1989 int ssl3_get_new_session_ticket(SSL *s)
1990 {
1991 int ok,al,ret=0, ticklen;
1992 long n;
1993 const unsigned char *p;
1994 unsigned char *d;
1995
1996 n=s->method->ssl_get_message(s,
1997 SSL3_ST_CR_SESSION_TICKET_A,
1998 SSL3_ST_CR_SESSION_TICKET_B,
1999 -1,
2000 16384,
2001 &ok);
2002
2003 if (!ok)
2004 return((int)n);
2005
2006 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
2007 {
2008 s->s3->tmp.reuse_message=1;
2009 return(1);
2010 }
2011 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
2012 {
2013 al=SSL_AD_UNEXPECTED_MESSAGE;
2014 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2015 goto f_err;
2016 }
2017 if (n < 6)
2018 {
2019 /* need at least ticket_lifetime_hint + ticket length */
2020 al = SSL_AD_DECODE_ERROR;
2021 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2022 goto f_err;
2023 }
2024
2025 p=d=(unsigned char *)s->init_msg;
2026 n2l(p, s->session->tlsext_tick_lifetime_hint);
2027 n2s(p, ticklen);
2028 /* ticket_lifetime_hint + ticket_length + ticket */
2029 if (ticklen + 6 != n)
2030 {
2031 al = SSL_AD_DECODE_ERROR;
2032 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2033 goto f_err;
2034 }
2035 if (s->session->tlsext_tick)
2036 {
2037 OPENSSL_free(s->session->tlsext_tick);
2038 s->session->tlsext_ticklen = 0;
2039 }
2040 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2041 if (!s->session->tlsext_tick)
2042 {
2043 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2044 goto err;
2045 }
2046 memcpy(s->session->tlsext_tick, p, ticklen);
2047 s->session->tlsext_ticklen = ticklen;
2048 /* There are two ways to detect a resumed ticket sesion.
2049 * One is to set an appropriate session ID and then the server
2050 * must return a match in ServerHello. This allows the normal
2051 * client session ID matching to work and we know much
2052 * earlier that the ticket has been accepted.
2053 *
2054 * The other way is to set zero length session ID when the
2055 * ticket is presented and rely on the handshake to determine
2056 * session resumption.
2057 *
2058 * We choose the former approach because this fits in with
2059 * assumptions elsewhere in OpenSSL. The session ID is set
2060 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2061 * ticket.
2062 */
2063 EVP_Digest(p, ticklen,
2064 s->session->session_id, &s->session->session_id_length,
2065 #ifndef OPENSSL_NO_SHA256
2066 EVP_sha256(), NULL);
2067 #else
2068 EVP_sha1(), NULL);
2069 #endif
2070 ret=1;
2071 return(ret);
2072 f_err:
2073 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2074 err:
2075 return(-1);
2076 }
2077
2078 int ssl3_get_cert_status(SSL *s)
2079 {
2080 int ok, al;
2081 unsigned long resplen,n;
2082 const unsigned char *p;
2083
2084 n=s->method->ssl_get_message(s,
2085 SSL3_ST_CR_CERT_STATUS_A,
2086 SSL3_ST_CR_CERT_STATUS_B,
2087 SSL3_MT_CERTIFICATE_STATUS,
2088 16384,
2089 &ok);
2090
2091 if (!ok) return((int)n);
2092 if (n < 4)
2093 {
2094 /* need at least status type + length */
2095 al = SSL_AD_DECODE_ERROR;
2096 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2097 goto f_err;
2098 }
2099 p = (unsigned char *)s->init_msg;
2100 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2101 {
2102 al = SSL_AD_DECODE_ERROR;
2103 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2104 goto f_err;
2105 }
2106 n2l3(p, resplen);
2107 if (resplen + 4 != n)
2108 {
2109 al = SSL_AD_DECODE_ERROR;
2110 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2111 goto f_err;
2112 }
2113 if (s->tlsext_ocsp_resp)
2114 OPENSSL_free(s->tlsext_ocsp_resp);
2115 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2116 if (!s->tlsext_ocsp_resp)
2117 {
2118 al = SSL_AD_INTERNAL_ERROR;
2119 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2120 goto f_err;
2121 }
2122 s->tlsext_ocsp_resplen = resplen;
2123 if (s->ctx->tlsext_status_cb)
2124 {
2125 int ret;
2126 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2127 if (ret == 0)
2128 {
2129 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2130 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2131 goto f_err;
2132 }
2133 if (ret < 0)
2134 {
2135 al = SSL_AD_INTERNAL_ERROR;
2136 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2137 goto f_err;
2138 }
2139 }
2140 return 1;
2141 f_err:
2142 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2143 return(-1);
2144 }
2145 #endif
2146
2147 int ssl3_get_server_done(SSL *s)
2148 {
2149 int ok,ret=0;
2150 long n;
2151
2152 n=s->method->ssl_get_message(s,
2153 SSL3_ST_CR_SRVR_DONE_A,
2154 SSL3_ST_CR_SRVR_DONE_B,
2155 SSL3_MT_SERVER_DONE,
2156 30, /* should be very small, like 0 :-) */
2157 &ok);
2158
2159 if (!ok) return((int)n);
2160 if (n > 0)
2161 {
2162 /* should contain no data */
2163 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2164 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2165 return -1;
2166 }
2167 ret=1;
2168 return(ret);
2169 }
2170
2171
2172 int ssl3_send_client_key_exchange(SSL *s)
2173 {
2174 unsigned char *p,*d;
2175 int n;
2176 unsigned long alg_k;
2177 #ifndef OPENSSL_NO_RSA
2178 unsigned char *q;
2179 EVP_PKEY *pkey=NULL;
2180 #endif
2181 #ifndef OPENSSL_NO_KRB5
2182 KSSL_ERR kssl_err;
2183 #endif /* OPENSSL_NO_KRB5 */
2184 #ifndef OPENSSL_NO_ECDH
2185 EC_KEY *clnt_ecdh = NULL;
2186 const EC_POINT *srvr_ecpoint = NULL;
2187 EVP_PKEY *srvr_pub_pkey = NULL;
2188 unsigned char *encodedPoint = NULL;
2189 int encoded_pt_len = 0;
2190 BN_CTX * bn_ctx = NULL;
2191 #endif
2192
2193 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2194 {
2195 d=(unsigned char *)s->init_buf->data;
2196 p= &(d[4]);
2197
2198 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2199
2200 /* Fool emacs indentation */
2201 if (0) {}
2202 #ifndef OPENSSL_NO_RSA
2203 else if (alg_k & SSL_kRSA)
2204 {
2205 RSA *rsa;
2206 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2207
2208 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2209 rsa=s->session->sess_cert->peer_rsa_tmp;
2210 else
2211 {
2212 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2213 if ((pkey == NULL) ||
2214 (pkey->type != EVP_PKEY_RSA) ||
2215 (pkey->pkey.rsa == NULL))
2216 {
2217 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2218 goto err;
2219 }
2220 rsa=pkey->pkey.rsa;
2221 EVP_PKEY_free(pkey);
2222 }
2223
2224 tmp_buf[0]=s->client_version>>8;
2225 tmp_buf[1]=s->client_version&0xff;
2226 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2227 goto err;
2228
2229 s->session->master_key_length=sizeof tmp_buf;
2230
2231 q=p;
2232 /* Fix buf for TLS and beyond */
2233 if (s->version > SSL3_VERSION)
2234 p+=2;
2235 n=RSA_public_encrypt(sizeof tmp_buf,
2236 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2237 #ifdef PKCS1_CHECK
2238 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2239 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2240 #endif
2241 if (n <= 0)
2242 {
2243 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2244 goto err;
2245 }
2246
2247 /* Fix buf for TLS and beyond */
2248 if (s->version > SSL3_VERSION)
2249 {
2250 s2n(n,q);
2251 n+=2;
2252 }
2253
2254 s->session->master_key_length=
2255 s->method->ssl3_enc->generate_master_secret(s,
2256 s->session->master_key,
2257 tmp_buf,sizeof tmp_buf);
2258 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2259 }
2260 #endif
2261 #ifndef OPENSSL_NO_KRB5
2262 else if (alg_k & SSL_kKRB5)
2263 {
2264 krb5_error_code krb5rc;
2265 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2266 /* krb5_data krb5_ap_req; */
2267 krb5_data *enc_ticket;
2268 krb5_data authenticator, *authp = NULL;
2269 EVP_CIPHER_CTX ciph_ctx;
2270 const EVP_CIPHER *enc = NULL;
2271 unsigned char iv[EVP_MAX_IV_LENGTH];
2272 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2273 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2274 + EVP_MAX_IV_LENGTH];
2275 int padl, outl = sizeof(epms);
2276
2277 EVP_CIPHER_CTX_init(&ciph_ctx);
2278
2279 #ifdef KSSL_DEBUG
2280 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2281 alg_k, SSL_kKRB5);
2282 #endif /* KSSL_DEBUG */
2283
2284 authp = NULL;
2285 #ifdef KRB5SENDAUTH
2286 if (KRB5SENDAUTH) authp = &authenticator;
2287 #endif /* KRB5SENDAUTH */
2288
2289 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2290 &kssl_err);
2291 enc = kssl_map_enc(kssl_ctx->enctype);
2292 if (enc == NULL)
2293 goto err;
2294 #ifdef KSSL_DEBUG
2295 {
2296 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2297 if (krb5rc && kssl_err.text)
2298 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2299 }
2300 #endif /* KSSL_DEBUG */
2301
2302 if (krb5rc)
2303 {
2304 ssl3_send_alert(s,SSL3_AL_FATAL,
2305 SSL_AD_HANDSHAKE_FAILURE);
2306 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2307 kssl_err.reason);
2308 goto err;
2309 }
2310
2311 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2312 ** in place of RFC 2712 KerberosWrapper, as in:
2313 **
2314 ** Send ticket (copy to *p, set n = length)
2315 ** n = krb5_ap_req.length;
2316 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2317 ** if (krb5_ap_req.data)
2318 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2319 **
2320 ** Now using real RFC 2712 KerberosWrapper
2321 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2322 ** Note: 2712 "opaque" types are here replaced
2323 ** with a 2-byte length followed by the value.
2324 ** Example:
2325 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2326 ** Where "xx xx" = length bytes. Shown here with
2327 ** optional authenticator omitted.
2328 */
2329
2330 /* KerberosWrapper.Ticket */
2331 s2n(enc_ticket->length,p);
2332 memcpy(p, enc_ticket->data, enc_ticket->length);
2333 p+= enc_ticket->length;
2334 n = enc_ticket->length + 2;
2335
2336 /* KerberosWrapper.Authenticator */
2337 if (authp && authp->length)
2338 {
2339 s2n(authp->length,p);
2340 memcpy(p, authp->data, authp->length);
2341 p+= authp->length;
2342 n+= authp->length + 2;
2343
2344 free(authp->data);
2345 authp->data = NULL;
2346 authp->length = 0;
2347 }
2348 else
2349 {
2350 s2n(0,p);/* null authenticator length */
2351 n+=2;
2352 }
2353
2354 tmp_buf[0]=s->client_version>>8;
2355 tmp_buf[1]=s->client_version&0xff;
2356 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2357 goto err;
2358
2359 /* 20010420 VRS. Tried it this way; failed.
2360 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2361 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2362 ** kssl_ctx->length);
2363 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2364 */
2365
2366 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2367 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2368 kssl_ctx->key,iv);
2369 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2370 sizeof tmp_buf);
2371 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2372 outl += padl;
2373 if (outl > (int)sizeof epms)
2374 {
2375 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2376 goto err;
2377 }
2378 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2379
2380 /* KerberosWrapper.EncryptedPreMasterSecret */
2381 s2n(outl,p);
2382 memcpy(p, epms, outl);
2383 p+=outl;
2384 n+=outl + 2;
2385
2386 s->session->master_key_length=
2387 s->method->ssl3_enc->generate_master_secret(s,
2388 s->session->master_key,
2389 tmp_buf, sizeof tmp_buf);
2390
2391 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2392 OPENSSL_cleanse(epms, outl);
2393 }
2394 #endif
2395 #ifndef OPENSSL_NO_DH
2396 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2397 {
2398 DH *dh_srvr,*dh_clnt;
2399
2400 if (s->session->sess_cert == NULL)
2401 {
2402 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2403 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2404 goto err;
2405 }
2406
2407 if (s->session->sess_cert->peer_dh_tmp != NULL)
2408 dh_srvr=s->session->sess_cert->peer_dh_tmp;
2409 else
2410 {
2411 /* we get them from the cert */
2412 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2413 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
2414 goto err;
2415 }
2416
2417 /* generate a new random key */
2418 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2419 {
2420 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2421 goto err;
2422 }
2423 if (!DH_generate_key(dh_clnt))
2424 {
2425 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2426 DH_free(dh_clnt);
2427 goto err;
2428 }
2429
2430 /* use the 'p' output buffer for the DH key, but
2431 * make sure to clear it out afterwards */
2432
2433 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2434
2435 if (n <= 0)
2436 {
2437 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2438 DH_free(dh_clnt);
2439 goto err;
2440 }
2441
2442 /* generate master key from the result */
2443 s->session->master_key_length=
2444 s->method->ssl3_enc->generate_master_secret(s,
2445 s->session->master_key,p,n);
2446 /* clean up */
2447 memset(p,0,n);
2448
2449 /* send off the data */
2450 n=BN_num_bytes(dh_clnt->pub_key);
2451 s2n(n,p);
2452 BN_bn2bin(dh_clnt->pub_key,p);
2453 n+=2;
2454
2455 DH_free(dh_clnt);
2456
2457 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2458 }
2459 #endif
2460
2461 #ifndef OPENSSL_NO_ECDH
2462 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
2463 {
2464 const EC_GROUP *srvr_group = NULL;
2465 EC_KEY *tkey;
2466 int ecdh_clnt_cert = 0;
2467 int field_size = 0;
2468
2469 /* Did we send out the client's
2470 * ECDH share for use in premaster
2471 * computation as part of client certificate?
2472 * If so, set ecdh_clnt_cert to 1.
2473 */
2474 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2475 {
2476 /* XXX: For now, we do not support client
2477 * authentication using ECDH certificates.
2478 * To add such support, one needs to add
2479 * code that checks for appropriate
2480 * conditions and sets ecdh_clnt_cert to 1.
2481 * For example, the cert have an ECC
2482 * key on the same curve as the server's
2483 * and the key should be authorized for
2484 * key agreement.
2485 *
2486 * One also needs to add code in ssl3_connect
2487 * to skip sending the certificate verify
2488 * message.
2489 *
2490 * if ((s->cert->key->privatekey != NULL) &&
2491 * (s->cert->key->privatekey->type ==
2492 * EVP_PKEY_EC) && ...)
2493 * ecdh_clnt_cert = 1;
2494 */
2495 }
2496
2497 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2498 {
2499 tkey = s->session->sess_cert->peer_ecdh_tmp;
2500 }
2501 else
2502 {
2503 /* Get the Server Public Key from Cert */
2504 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2505 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2506 if ((srvr_pub_pkey == NULL) ||
2507 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2508 (srvr_pub_pkey->pkey.ec == NULL))
2509 {
2510 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2511 ERR_R_INTERNAL_ERROR);
2512 goto err;
2513 }
2514
2515 tkey = srvr_pub_pkey->pkey.ec;
2516 }
2517
2518 srvr_group = EC_KEY_get0_group(tkey);
2519 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2520
2521 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2522 {
2523 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2524 ERR_R_INTERNAL_ERROR);
2525 goto err;
2526 }
2527
2528 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2529 {
2530 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2531 goto err;
2532 }
2533
2534 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2535 {
2536 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2537 goto err;
2538 }
2539 if (ecdh_clnt_cert)
2540 {
2541 /* Reuse key info from our certificate
2542 * We only need our private key to perform
2543 * the ECDH computation.
2544 */
2545 const BIGNUM *priv_key;
2546 tkey = s->cert->key->privatekey->pkey.ec;
2547 priv_key = EC_KEY_get0_private_key(tkey);
2548 if (priv_key == NULL)
2549 {
2550 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2551 goto err;
2552 }
2553 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2554 {
2555 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2556 goto err;
2557 }
2558 }
2559 else
2560 {
2561 /* Generate a new ECDH key pair */
2562 if (!(EC_KEY_generate_key(clnt_ecdh)))
2563 {
2564 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2565 goto err;
2566 }
2567 }
2568
2569 /* use the 'p' output buffer for the ECDH key, but
2570 * make sure to clear it out afterwards
2571 */
2572
2573 field_size = EC_GROUP_get_degree(srvr_group);
2574 if (field_size <= 0)
2575 {
2576 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2577 ERR_R_ECDH_LIB);
2578 goto err;
2579 }
2580 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2581 if (n <= 0)
2582 {
2583 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2584 ERR_R_ECDH_LIB);
2585 goto err;
2586 }
2587
2588 /* generate master key from the result */
2589 s->session->master_key_length = s->method->ssl3_enc \
2590 -> generate_master_secret(s,
2591 s->session->master_key,
2592 p, n);
2593
2594 memset(p, 0, n); /* clean up */
2595
2596 if (ecdh_clnt_cert)
2597 {
2598 /* Send empty client key exch message */
2599 n = 0;
2600 }
2601 else
2602 {
2603 /* First check the size of encoding and
2604 * allocate memory accordingly.
2605 */
2606 encoded_pt_len =
2607 EC_POINT_point2oct(srvr_group,
2608 EC_KEY_get0_public_key(clnt_ecdh),
2609 POINT_CONVERSION_UNCOMPRESSED,
2610 NULL, 0, NULL);
2611
2612 encodedPoint = (unsigned char *)
2613 OPENSSL_malloc(encoded_pt_len *
2614 sizeof(unsigned char));
2615 bn_ctx = BN_CTX_new();
2616 if ((encodedPoint == NULL) ||
2617 (bn_ctx == NULL))
2618 {
2619 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2620 goto err;
2621 }
2622
2623 /* Encode the public key */
2624 n = EC_POINT_point2oct(srvr_group,
2625 EC_KEY_get0_public_key(clnt_ecdh),
2626 POINT_CONVERSION_UNCOMPRESSED,
2627 encodedPoint, encoded_pt_len, bn_ctx);
2628
2629 *p = n; /* length of encoded point */
2630 /* Encoded point will be copied here */
2631 p += 1;
2632 /* copy the point */
2633 memcpy((unsigned char *)p, encodedPoint, n);
2634 /* increment n to account for length field */
2635 n += 1;
2636 }
2637
2638 /* Free allocated memory */
2639 BN_CTX_free(bn_ctx);
2640 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2641 if (clnt_ecdh != NULL)
2642 EC_KEY_free(clnt_ecdh);
2643 EVP_PKEY_free(srvr_pub_pkey);
2644 }
2645 #endif /* !OPENSSL_NO_ECDH */
2646 else if (alg_k & SSL_kGOST)
2647 {
2648 /* GOST key exchange message creation */
2649 EVP_PKEY_CTX *pkey_ctx;
2650 X509 *peer_cert;
2651 size_t msglen;
2652 unsigned int md_len;
2653 int keytype;
2654 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2655 EVP_MD_CTX *ukm_hash;
2656 EVP_PKEY *pub_key;
2657
2658 /* Get server sertificate PKEY and create ctx from it */
2659 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2660 if (!peer_cert)
2661 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2662 if (!peer_cert) {
2663 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2664 goto err;
2665 }
2666
2667 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2668 /* If we have send a certificate, and certificate key
2669
2670 * parameters match those of server certificate, use
2671 * certificate key for key exchange
2672 */
2673
2674 /* Otherwise, generate ephemeral key pair */
2675
2676 EVP_PKEY_encrypt_init(pkey_ctx);
2677 /* Generate session key */
2678 RAND_bytes(premaster_secret,32);
2679 /* If we have client certificate, use its secret as peer key */
2680 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2681 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
2682 /* If there was an error - just ignore it. Ephemeral key
2683 * would be used
2684 */
2685 ERR_clear_error();
2686 }
2687 }
2688 /* Compute shared IV and store it in algorithm-specific
2689 * context data */
2690 ukm_hash = EVP_MD_CTX_create();
2691 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
2692 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
2693 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
2694 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2695 EVP_MD_CTX_destroy(ukm_hash);
2696 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
2697 8,shared_ukm)<0) {
2698 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2699 SSL_R_LIBRARY_BUG);
2700 goto err;
2701 }
2702 /* Make GOST keytransport blob message */
2703 /*Encapsulate it into sequence */
2704 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2705 msglen=255;
2706 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
2707 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2708 SSL_R_LIBRARY_BUG);
2709 goto err;
2710 }
2711 if (msglen >= 0x80)
2712 {
2713 *(p++)=0x81;
2714 *(p++)= msglen & 0xff;
2715 n=msglen+3;
2716 }
2717 else
2718 {
2719 *(p++)= msglen & 0xff;
2720 n=msglen+2;
2721 }
2722 memcpy(p, tmp, msglen);
2723 /* Check if pubkey from client certificate was used */
2724 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2725 {
2726 /* Set flag "skip certificate verify" */
2727 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2728 }
2729 EVP_PKEY_CTX_free(pkey_ctx);
2730 s->session->master_key_length=
2731 s->method->ssl3_enc->generate_master_secret(s,
2732 s->session->master_key,premaster_secret,32);
2733 EVP_PKEY_free(pub_key);
2734
2735 }
2736 #ifndef OPENSSL_NO_SRP
2737 else if (alg_k & SSL_kSRP)
2738 {
2739 if (s->srp_ctx.A != NULL)
2740 {
2741 /* send off the data */
2742 n=BN_num_bytes(s->srp_ctx.A);
2743 s2n(n,p);
2744 BN_bn2bin(s->srp_ctx.A,p);
2745 n+=2;
2746 }
2747 else
2748 {
2749 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2750 goto err;
2751 }
2752 if (s->session->srp_username != NULL)
2753 OPENSSL_free(s->session->srp_username);
2754 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2755 if (s->session->srp_username == NULL)
2756 {
2757 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2758 ERR_R_MALLOC_FAILURE);
2759 goto err;
2760 }
2761
2762 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
2763 {
2764 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2765 goto err;
2766 }
2767 }
2768 #endif
2769 #ifndef OPENSSL_NO_PSK
2770 else if (alg_k & SSL_kPSK)
2771 {
2772 char identity[PSK_MAX_IDENTITY_LEN];
2773 unsigned char *t = NULL;
2774 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
2775 unsigned int pre_ms_len = 0, psk_len = 0;
2776 int psk_err = 1;
2777
2778 n = 0;
2779 if (s->psk_client_callback == NULL)
2780 {
2781 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2782 SSL_R_PSK_NO_CLIENT_CB);
2783 goto err;
2784 }
2785
2786 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
2787 identity, PSK_MAX_IDENTITY_LEN,
2788 psk_or_pre_ms, sizeof(psk_or_pre_ms));
2789 if (psk_len > PSK_MAX_PSK_LEN)
2790 {
2791 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2792 ERR_R_INTERNAL_ERROR);
2793 goto psk_err;
2794 }
2795 else if (psk_len == 0)
2796 {
2797 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2798 SSL_R_PSK_IDENTITY_NOT_FOUND);
2799 goto psk_err;
2800 }
2801
2802 /* create PSK pre_master_secret */
2803 pre_ms_len = 2+psk_len+2+psk_len;
2804 t = psk_or_pre_ms;
2805 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
2806 s2n(psk_len, t);
2807 memset(t, 0, psk_len);
2808 t+=psk_len;
2809 s2n(psk_len, t);
2810
2811 if (s->session->psk_identity_hint != NULL)
2812 OPENSSL_free(s->session->psk_identity_hint);
2813 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
2814 if (s->ctx->psk_identity_hint != NULL &&
2815 s->session->psk_identity_hint == NULL)
2816 {
2817 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2818 ERR_R_MALLOC_FAILURE);
2819 goto psk_err;
2820 }
2821
2822 if (s->session->psk_identity != NULL)
2823 OPENSSL_free(s->session->psk_identity);
2824 s->session->psk_identity = BUF_strdup(identity);
2825 if (s->session->psk_identity == NULL)
2826 {
2827 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2828 ERR_R_MALLOC_FAILURE);
2829 goto psk_err;
2830 }
2831
2832 s->session->master_key_length =
2833 s->method->ssl3_enc->generate_master_secret(s,
2834 s->session->master_key,
2835 psk_or_pre_ms, pre_ms_len);
2836 n = strlen(identity);
2837 s2n(n, p);
2838 memcpy(p, identity, n);
2839 n+=2;
2840 psk_err = 0;
2841 psk_err:
2842 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
2843 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
2844 if (psk_err != 0)
2845 {
2846 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2847 goto err;
2848 }
2849 }
2850 #endif
2851 else
2852 {
2853 ssl3_send_alert(s, SSL3_AL_FATAL,
2854 SSL_AD_HANDSHAKE_FAILURE);
2855 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2856 ERR_R_INTERNAL_ERROR);
2857 goto err;
2858 }
2859
2860 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
2861 l2n3(n,d);
2862
2863 s->state=SSL3_ST_CW_KEY_EXCH_B;
2864 /* number of bytes to write */
2865 s->init_num=n+4;
2866 s->init_off=0;
2867 }
2868
2869 /* SSL3_ST_CW_KEY_EXCH_B */
2870 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2871 err:
2872 #ifndef OPENSSL_NO_ECDH
2873 BN_CTX_free(bn_ctx);
2874 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2875 if (clnt_ecdh != NULL)
2876 EC_KEY_free(clnt_ecdh);
2877 EVP_PKEY_free(srvr_pub_pkey);
2878 #endif
2879 return(-1);
2880 }
2881
2882 int ssl3_send_client_verify(SSL *s)
2883 {
2884 unsigned char *p,*d;
2885 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
2886 EVP_PKEY *pkey;
2887 EVP_PKEY_CTX *pctx=NULL;
2888 EVP_MD_CTX mctx;
2889 unsigned u=0;
2890 unsigned long n;
2891 int j;
2892
2893 EVP_MD_CTX_init(&mctx);
2894
2895 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
2896 {
2897 d=(unsigned char *)s->init_buf->data;
2898 p= &(d[4]);
2899 pkey=s->cert->key->privatekey;
2900 /* Create context from key and test if sha1 is allowed as digest */
2901 pctx = EVP_PKEY_CTX_new(pkey,NULL);
2902 EVP_PKEY_sign_init(pctx);
2903 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
2904 {
2905 if (TLS1_get_version(s) < TLS1_2_VERSION)
2906 s->method->ssl3_enc->cert_verify_mac(s,
2907 NID_sha1,
2908 &(data[MD5_DIGEST_LENGTH]));
2909 }
2910 else
2911 {
2912 ERR_clear_error();
2913 }
2914 /* For TLS v1.2 send signature algorithm and signature
2915 * using agreed digest and cached handshake records.
2916 */
2917 if (TLS1_get_version(s) >= TLS1_2_VERSION)
2918 {
2919 long hdatalen = 0;
2920 void *hdata;
2921 const EVP_MD *md = s->cert->key->digest;
2922 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
2923 &hdata);
2924 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
2925 {
2926 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2927 ERR_R_INTERNAL_ERROR);
2928 goto err;
2929 }
2930 p += 2;
2931 #ifdef SSL_DEBUG
2932 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
2933 EVP_MD_name(md));
2934 #endif
2935 if (!EVP_SignInit_ex(&mctx, md, NULL)
2936 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
2937 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
2938 {
2939 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2940 ERR_R_EVP_LIB);
2941 goto err;
2942 }
2943 s2n(u,p);
2944 n = u + 4;
2945 if (!ssl3_digest_cached_records(s))
2946 goto err;
2947 }
2948 else
2949 #ifndef OPENSSL_NO_RSA
2950 if (pkey->type == EVP_PKEY_RSA)
2951 {
2952 s->method->ssl3_enc->cert_verify_mac(s,
2953 NID_md5,
2954 &(data[0]));
2955 if (RSA_sign(NID_md5_sha1, data,
2956 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
2957 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
2958 {
2959 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
2960 goto err;
2961 }
2962 s2n(u,p);
2963 n=u+2;
2964 }
2965 else
2966 #endif
2967 #ifndef OPENSSL_NO_DSA
2968 if (pkey->type == EVP_PKEY_DSA)
2969 {
2970 if (!DSA_sign(pkey->save_type,
2971 &(data[MD5_DIGEST_LENGTH]),
2972 SHA_DIGEST_LENGTH,&(p[2]),
2973 (unsigned int *)&j,pkey->pkey.dsa))
2974 {
2975 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
2976 goto err;
2977 }
2978 s2n(j,p);
2979 n=j+2;
2980 }
2981 else
2982 #endif
2983 #ifndef OPENSSL_NO_ECDSA
2984 if (pkey->type == EVP_PKEY_EC)
2985 {
2986 if (!ECDSA_sign(pkey->save_type,
2987 &(data[MD5_DIGEST_LENGTH]),
2988 SHA_DIGEST_LENGTH,&(p[2]),
2989 (unsigned int *)&j,pkey->pkey.ec))
2990 {
2991 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2992 ERR_R_ECDSA_LIB);
2993 goto err;
2994 }
2995 s2n(j,p);
2996 n=j+2;
2997 }
2998 else
2999 #endif
3000 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3001 {
3002 unsigned char signbuf[64];
3003 int i;
3004 size_t sigsize=64;
3005 s->method->ssl3_enc->cert_verify_mac(s,
3006 NID_id_GostR3411_94,
3007 data);
3008 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3009 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3010 ERR_R_INTERNAL_ERROR);
3011 goto err;
3012 }
3013 for (i=63,j=0; i>=0; j++, i--) {
3014 p[2+j]=signbuf[i];
3015 }
3016 s2n(j,p);
3017 n=j+2;
3018 }
3019 else
3020 {
3021 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3022 goto err;
3023 }
3024 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
3025 l2n3(n,d);
3026
3027 s->state=SSL3_ST_CW_CERT_VRFY_B;
3028 s->init_num=(int)n+4;
3029 s->init_off=0;
3030 }
3031 EVP_MD_CTX_cleanup(&mctx);
3032 EVP_PKEY_CTX_free(pctx);
3033 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3034 err:
3035 EVP_MD_CTX_cleanup(&mctx);
3036 EVP_PKEY_CTX_free(pctx);
3037 return(-1);
3038 }
3039
3040 int ssl3_send_client_certificate(SSL *s)
3041 {
3042 X509 *x509=NULL;
3043 EVP_PKEY *pkey=NULL;
3044 int i;
3045 unsigned long l;
3046
3047 if (s->state == SSL3_ST_CW_CERT_A)
3048 {
3049 if ((s->cert == NULL) ||
3050 (s->cert->key->x509 == NULL) ||
3051 (s->cert->key->privatekey == NULL))
3052 s->state=SSL3_ST_CW_CERT_B;
3053 else
3054 s->state=SSL3_ST_CW_CERT_C;
3055 }
3056
3057 /* We need to get a client cert */
3058 if (s->state == SSL3_ST_CW_CERT_B)
3059 {
3060 /* If we get an error, we need to
3061 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3062 * We then get retied later */
3063 i=0;
3064 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3065 if (i < 0)
3066 {
3067 s->rwstate=SSL_X509_LOOKUP;
3068 return(-1);
3069 }
3070 s->rwstate=SSL_NOTHING;
3071 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3072 {
3073 s->state=SSL3_ST_CW_CERT_B;
3074 if ( !SSL_use_certificate(s,x509) ||
3075 !SSL_use_PrivateKey(s,pkey))
3076 i=0;
3077 }
3078 else if (i == 1)
3079 {
3080 i=0;
3081 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3082 }
3083
3084 if (x509 != NULL) X509_free(x509);
3085 if (pkey != NULL) EVP_PKEY_free(pkey);
3086 if (i == 0)
3087 {
3088 if (s->version == SSL3_VERSION)
3089 {
3090 s->s3->tmp.cert_req=0;
3091 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3092 return(1);
3093 }
3094 else
3095 {
3096 s->s3->tmp.cert_req=2;
3097 }
3098 }
3099
3100 /* Ok, we have a cert */
3101 s->state=SSL3_ST_CW_CERT_C;
3102 }
3103
3104 if (s->state == SSL3_ST_CW_CERT_C)
3105 {
3106 s->state=SSL3_ST_CW_CERT_D;
3107 l=ssl3_output_cert_chain(s,
3108 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
3109 s->init_num=(int)l;
3110 s->init_off=0;
3111 }
3112 /* SSL3_ST_CW_CERT_D */
3113 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3114 }
3115
3116 #define has_bits(i,m) (((i)&(m)) == (m))
3117
3118 int ssl3_check_cert_and_algorithm(SSL *s)
3119 {
3120 int i,idx;
3121 long alg_k,alg_a;
3122 EVP_PKEY *pkey=NULL;
3123 SESS_CERT *sc;
3124 #ifndef OPENSSL_NO_RSA
3125 RSA *rsa;
3126 #endif
3127 #ifndef OPENSSL_NO_DH
3128 DH *dh;
3129 #endif
3130
3131 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3132 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3133
3134 /* we don't have a certificate */
3135 if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3136 return(1);
3137
3138 sc=s->session->sess_cert;
3139 if (sc == NULL)
3140 {
3141 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3142 goto err;
3143 }
3144
3145 #ifndef OPENSSL_NO_RSA
3146 rsa=s->session->sess_cert->peer_rsa_tmp;
3147 #endif
3148 #ifndef OPENSSL_NO_DH
3149 dh=s->session->sess_cert->peer_dh_tmp;
3150 #endif
3151
3152 /* This is the passed certificate */
3153
3154 idx=sc->peer_cert_type;
3155 #ifndef OPENSSL_NO_ECDH
3156 if (idx == SSL_PKEY_ECC)
3157 {
3158 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3159 s) == 0)
3160 { /* check failed */
3161 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3162 goto f_err;
3163 }
3164 else
3165 {
3166 return 1;
3167 }
3168 }
3169 #endif
3170 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3171 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3172 EVP_PKEY_free(pkey);
3173
3174
3175 /* Check that we have a certificate if we require one */
3176 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3177 {
3178 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3179 goto f_err;
3180 }
3181 #ifndef OPENSSL_NO_DSA
3182 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3183 {
3184 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3185 goto f_err;
3186 }
3187 #endif
3188 #ifndef OPENSSL_NO_RSA
3189 if ((alg_k & SSL_kRSA) &&
3190 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3191 {
3192 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3193 goto f_err;
3194 }
3195 #endif
3196 #ifndef OPENSSL_NO_DH
3197 if ((alg_k & SSL_kEDH) &&
3198 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3199 {
3200 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3201 goto f_err;
3202 }
3203 else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3204 {
3205 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3206 goto f_err;
3207 }
3208 #ifndef OPENSSL_NO_DSA
3209 else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3210 {
3211 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3212 goto f_err;
3213 }
3214 #endif
3215 #endif
3216
3217 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3218 {
3219 #ifndef OPENSSL_NO_RSA
3220 if (alg_k & SSL_kRSA)
3221 {
3222 if (rsa == NULL
3223 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3224 {
3225 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3226 goto f_err;
3227 }
3228 }
3229 else
3230 #endif
3231 #ifndef OPENSSL_NO_DH
3232 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
3233 {
3234 if (dh == NULL
3235 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3236 {
3237 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3238 goto f_err;
3239 }
3240 }
3241 else
3242 #endif
3243 {
3244 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3245 goto f_err;
3246 }
3247 }
3248 return(1);
3249 f_err:
3250 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3251 err:
3252 return(0);
3253 }
3254
3255 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
3256 int ssl3_send_next_proto(SSL *s)
3257 {
3258 unsigned int len, padding_len;
3259 unsigned char *d;
3260
3261 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3262 {
3263 len = s->next_proto_negotiated_len;
3264 padding_len = 32 - ((len + 2) % 32);
3265 d = (unsigned char *)s->init_buf->data;
3266 d[4] = len;
3267 memcpy(d + 5, s->next_proto_negotiated, len);
3268 d[5 + len] = padding_len;
3269 memset(d + 6 + len, 0, padding_len);
3270 *(d++)=SSL3_MT_NEXT_PROTO;
3271 l2n3(2 + len + padding_len, d);
3272 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3273 s->init_num = 4 + 2 + len + padding_len;
3274 s->init_off = 0;
3275 }
3276
3277 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3278 }
3279 #endif /* !OPENSSL_NO_TLSEXT && !OPENSSL_NO_NEXTPROTONEG */
3280
3281 /* Check to see if handshake is full or resumed. Usually this is just a
3282 * case of checking to see if a cache hit has occurred. In the case of
3283 * session tickets we have to check the next message to be sure.
3284 */
3285
3286 #ifndef OPENSSL_NO_TLSEXT
3287 int ssl3_check_finished(SSL *s)
3288 {
3289 int ok;
3290 long n;
3291 /* If we have no ticket it cannot be a resumed session. */
3292 if (!s->session->tlsext_tick)
3293 return 1;
3294 /* this function is called when we really expect a Certificate
3295 * message, so permit appropriate message length */
3296 n=s->method->ssl_get_message(s,
3297 SSL3_ST_CR_CERT_A,
3298 SSL3_ST_CR_CERT_B,
3299 -1,
3300 s->max_cert_list,
3301 &ok);
3302 if (!ok) return((int)n);
3303 s->s3->tmp.reuse_message = 1;
3304 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3305 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3306 return 2;
3307
3308 return 1;
3309 }
3310 #endif
3311
3312 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3313 {
3314 int i = 0;
3315 #ifndef OPENSSL_NO_ENGINE
3316 if (s->ctx->client_cert_engine)
3317 {
3318 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3319 SSL_get_client_CA_list(s),
3320 px509, ppkey, NULL, NULL, NULL);
3321 if (i != 0)
3322 return i;
3323 }
3324 #endif
3325 if (s->ctx->client_cert_cb)
3326 i = s->ctx->client_cert_cb(s,px509,ppkey);
3327 return i;
3328 }
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