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
ssl3_get_client_method(int ver)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
IMPLEMENT_ssl3_meth_func(SSLv3_client_method,ssl_undefined_function,ssl3_connect,ssl3_get_client_method)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 #if 0 /* Send app data in separate packet, otherwise, some particular site
206 * (only one site so far) closes the socket.
207 * Note: there is a very small chance that two TCP packets
208 * could be arriving at server combined into a single TCP packet,
209 * then trigger that site to break. We haven't encounter that though.
210 */
211 if (SSL_get_mode(s) & SSL_MODE_HANDSHAKE_CUTTHROUGH)
212 {
213 /* Send app data along with CCS/Finished */
214 s->s3->flags |= SSL3_FLAGS_DELAY_CLIENT_FINISHED;
215 }
216 #endif
217
218 #ifndef OPENSSL_NO_HEARTBEATS
219 /* If we're awaiting a HeartbeatResponse, pretend we
220 * already got and don't await it anymore, because
221 * Heartbeats don't make sense during handshakes anyway.
222 */
223 if (s->tlsext_hb_pending)
224 {
225 s->tlsext_hb_pending = 0;
226 s->tlsext_hb_seq++;
227 }
228 #endif
229
230 for (;;)
231 {
232 state=s->state;
233
234 switch(s->state)
235 {
236 case SSL_ST_RENEGOTIATE:
237 s->renegotiate=1;
238 s->state=SSL_ST_CONNECT;
239 s->ctx->stats.sess_connect_renegotiate++;
240 /* break */
241 case SSL_ST_BEFORE:
242 case SSL_ST_CONNECT:
243 case SSL_ST_BEFORE|SSL_ST_CONNECT:
244 case SSL_ST_OK|SSL_ST_CONNECT:
245
246 s->server=0;
247 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
248
249 if ((s->version & 0xff00 ) != 0x0300)
250 {
251 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
252 ret = -1;
253 goto end;
254 }
255
256 /* s->version=SSL3_VERSION; */
257 s->type=SSL_ST_CONNECT;
258
259 if (s->init_buf == NULL)
260 {
261 if ((buf=BUF_MEM_new()) == NULL)
262 {
263 ret= -1;
264 goto end;
265 }
266 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
267 {
268 ret= -1;
269 goto end;
270 }
271 s->init_buf=buf;
272 buf=NULL;
273 }
274
275 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
276
277 /* setup buffing BIO */
278 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
279
280 /* don't push the buffering BIO quite yet */
281
282 ssl3_init_finished_mac(s);
283
284 s->state=SSL3_ST_CW_CLNT_HELLO_A;
285 s->ctx->stats.sess_connect++;
286 s->init_num=0;
287 break;
288
289 case SSL3_ST_CW_CLNT_HELLO_A:
290 case SSL3_ST_CW_CLNT_HELLO_B:
291
292 s->shutdown=0;
293 ret=ssl3_client_hello(s);
294 if (ret <= 0) goto end;
295 s->state=SSL3_ST_CR_SRVR_HELLO_A;
296 s->init_num=0;
297
298 /* turn on buffering for the next lot of output */
299 if (s->bbio != s->wbio)
300 s->wbio=BIO_push(s->bbio,s->wbio);
301
302 break;
303
304 case SSL3_ST_CR_SRVR_HELLO_A:
305 case SSL3_ST_CR_SRVR_HELLO_B:
306 ret=ssl3_get_server_hello(s);
307 if (ret <= 0) goto end;
308
309 if (s->hit)
310 {
311 s->state=SSL3_ST_CR_FINISHED_A;
312 #ifndef OPENSSL_NO_TLSEXT
313 if (s->tlsext_ticket_expected)
314 {
315 /* receive renewed session ticket */
316 s->state=SSL3_ST_CR_SESSION_TICKET_A;
317 }
318 #endif
319 }
320 else
321 s->state=SSL3_ST_CR_CERT_A;
322 s->init_num=0;
323 break;
324
325 case SSL3_ST_CR_CERT_A:
326 case SSL3_ST_CR_CERT_B:
327 #ifndef OPENSSL_NO_TLSEXT
328 ret=ssl3_check_finished(s);
329 if (ret <= 0) goto end;
330 if (ret == 2)
331 {
332 s->hit = 1;
333 if (s->tlsext_ticket_expected)
334 s->state=SSL3_ST_CR_SESSION_TICKET_A;
335 else
336 s->state=SSL3_ST_CR_FINISHED_A;
337 s->init_num=0;
338 break;
339 }
340 #endif
341 /* Check if it is anon DH/ECDH */
342 /* or PSK */
343 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
344 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
345 {
346 ret=ssl3_get_server_certificate(s);
347 if (ret <= 0) goto end;
348 #ifndef OPENSSL_NO_TLSEXT
349 if (s->tlsext_status_expected)
350 s->state=SSL3_ST_CR_CERT_STATUS_A;
351 else
352 s->state=SSL3_ST_CR_KEY_EXCH_A;
353 }
354 else
355 {
356 skip = 1;
357 s->state=SSL3_ST_CR_KEY_EXCH_A;
358 }
359 #else
360 }
361 else
362 skip=1;
363
364 s->state=SSL3_ST_CR_KEY_EXCH_A;
365 #endif
366 s->init_num=0;
367 break;
368
369 case SSL3_ST_CR_KEY_EXCH_A:
370 case SSL3_ST_CR_KEY_EXCH_B:
371 ret=ssl3_get_key_exchange(s);
372 if (ret <= 0) goto end;
373 s->state=SSL3_ST_CR_CERT_REQ_A;
374 s->init_num=0;
375
376 /* at this point we check that we have the
377 * required stuff from the server */
378 if (!ssl3_check_cert_and_algorithm(s))
379 {
380 ret= -1;
381 goto end;
382 }
383 break;
384
385 case SSL3_ST_CR_CERT_REQ_A:
386 case SSL3_ST_CR_CERT_REQ_B:
387 ret=ssl3_get_certificate_request(s);
388 if (ret <= 0) goto end;
389 s->state=SSL3_ST_CR_SRVR_DONE_A;
390 s->init_num=0;
391 break;
392
393 case SSL3_ST_CR_SRVR_DONE_A:
394 case SSL3_ST_CR_SRVR_DONE_B:
395 ret=ssl3_get_server_done(s);
396 if (ret <= 0) goto end;
397 #ifndef OPENSSL_NO_SRP
398 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP)
399 {
400 if ((ret = SRP_Calc_A_param(s))<=0)
401 {
402 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
403 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
404 goto end;
405 }
406 }
407 #endif
408 if (s->s3->tmp.cert_req)
409 s->state=SSL3_ST_CW_CERT_A;
410 else
411 s->state=SSL3_ST_CW_KEY_EXCH_A;
412 s->init_num=0;
413
414 break;
415
416 case SSL3_ST_CW_CERT_A:
417 case SSL3_ST_CW_CERT_B:
418 case SSL3_ST_CW_CERT_C:
419 case SSL3_ST_CW_CERT_D:
420 ret=ssl3_send_client_certificate(s);
421 if (ret <= 0) goto end;
422 s->state=SSL3_ST_CW_KEY_EXCH_A;
423 s->init_num=0;
424 break;
425
426 case SSL3_ST_CW_KEY_EXCH_A:
427 case SSL3_ST_CW_KEY_EXCH_B:
428 ret=ssl3_send_client_key_exchange(s);
429 if (ret <= 0) goto end;
430 /* EAY EAY EAY need to check for DH fix cert
431 * sent back */
432 /* For TLS, cert_req is set to 2, so a cert chain
433 * of nothing is sent, but no verify packet is sent */
434 /* XXX: For now, we do not support client
435 * authentication in ECDH cipher suites with
436 * ECDH (rather than ECDSA) certificates.
437 * We need to skip the certificate verify
438 * message when client's ECDH public key is sent
439 * inside the client certificate.
440 */
441 if (s->s3->tmp.cert_req == 1)
442 {
443 s->state=SSL3_ST_CW_CERT_VRFY_A;
444 }
445 else
446 {
447 s->state=SSL3_ST_CW_CHANGE_A;
448 s->s3->change_cipher_spec=0;
449 }
450 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
451 {
452 s->state=SSL3_ST_CW_CHANGE_A;
453 s->s3->change_cipher_spec=0;
454 }
455
456 s->init_num=0;
457 break;
458
459 case SSL3_ST_CW_CERT_VRFY_A:
460 case SSL3_ST_CW_CERT_VRFY_B:
461 ret=ssl3_send_client_verify(s);
462 if (ret <= 0) goto end;
463 s->state=SSL3_ST_CW_CHANGE_A;
464 s->init_num=0;
465 s->s3->change_cipher_spec=0;
466 break;
467
468 case SSL3_ST_CW_CHANGE_A:
469 case SSL3_ST_CW_CHANGE_B:
470 ret=ssl3_send_change_cipher_spec(s,
471 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
472 if (ret <= 0) goto end;
473
474
475 #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
476 s->state=SSL3_ST_CW_FINISHED_A;
477 #else
478 if (s->s3->next_proto_neg_seen)
479 s->state=SSL3_ST_CW_NEXT_PROTO_A;
480 else
481 s->state=SSL3_ST_CW_FINISHED_A;
482 #endif
483 s->init_num=0;
484
485 s->session->cipher=s->s3->tmp.new_cipher;
486 #ifdef OPENSSL_NO_COMP
487 s->session->compress_meth=0;
488 #else
489 if (s->s3->tmp.new_compression == NULL)
490 s->session->compress_meth=0;
491 else
492 s->session->compress_meth=
493 s->s3->tmp.new_compression->id;
494 #endif
495 if (!s->method->ssl3_enc->setup_key_block(s))
496 {
497 ret= -1;
498 goto end;
499 }
500
501 if (!s->method->ssl3_enc->change_cipher_state(s,
502 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
503 {
504 ret= -1;
505 goto end;
506 }
507
508 break;
509
510 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
511 case SSL3_ST_CW_NEXT_PROTO_A:
512 case SSL3_ST_CW_NEXT_PROTO_B:
513 ret=ssl3_send_next_proto(s);
514 if (ret <= 0) goto end;
515 s->state=SSL3_ST_CW_FINISHED_A;
516 break;
517 #endif
518
519 case SSL3_ST_CW_FINISHED_A:
520 case SSL3_ST_CW_FINISHED_B:
521 ret=ssl3_send_finished(s,
522 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
523 s->method->ssl3_enc->client_finished_label,
524 s->method->ssl3_enc->client_finished_label_len);
525 if (ret <= 0) goto end;
526 s->state=SSL3_ST_CW_FLUSH;
527
528 /* clear flags */
529 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
530 if (s->hit)
531 {
532 s->s3->tmp.next_state=SSL_ST_OK;
533 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
534 {
535 s->state=SSL_ST_OK;
536 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
537 s->s3->delay_buf_pop_ret=0;
538 }
539 }
540 else
541 {
542 if ((SSL_get_mode(s) & SSL_MODE_HANDSHAKE_CUTTHROUGH) && SSL_get_cipher_bits(s, NULL) >= 128
543 && s->s3->previous_server_finished_len == 0 /* no cutthrough on renegotiation (would complicate the state machine) */
544 )
545 {
546 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
547 {
548 s->state=SSL3_ST_CUTTHROUGH_COMPLETE;
549 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
550 s->s3->delay_buf_pop_ret=0;
551 }
552 else
553 {
554 s->s3->tmp.next_state=SSL3_ST_CUTTHROUGH_COMPLETE;
555 }
556 }
557 else
558 {
559 #ifndef OPENSSL_NO_TLSEXT
560 /* Allow NewSessionTicket if ticket expected */
561 if (s->tlsext_ticket_expected)
562 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
563 else
564 #endif
565 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
566 }
567 }
568 s->init_num=0;
569 break;
570
571 #ifndef OPENSSL_NO_TLSEXT
572 case SSL3_ST_CR_SESSION_TICKET_A:
573 case SSL3_ST_CR_SESSION_TICKET_B:
574 ret=ssl3_get_new_session_ticket(s);
575 if (ret <= 0) goto end;
576 s->state=SSL3_ST_CR_FINISHED_A;
577 s->init_num=0;
578 break;
579
580 case SSL3_ST_CR_CERT_STATUS_A:
581 case SSL3_ST_CR_CERT_STATUS_B:
582 ret=ssl3_get_cert_status(s);
583 if (ret <= 0) goto end;
584 s->state=SSL3_ST_CR_KEY_EXCH_A;
585 s->init_num=0;
586 break;
587 #endif
588
589 case SSL3_ST_CR_FINISHED_A:
590 case SSL3_ST_CR_FINISHED_B:
591
592 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
593 SSL3_ST_CR_FINISHED_B);
594 if (ret <= 0) goto end;
595
596 if (s->hit)
597 s->state=SSL3_ST_CW_CHANGE_A;
598 else
599 s->state=SSL_ST_OK;
600 s->init_num=0;
601 break;
602
603 case SSL3_ST_CW_FLUSH:
604 s->rwstate=SSL_WRITING;
605 if (BIO_flush(s->wbio) <= 0)
606 {
607 ret= -1;
608 goto end;
609 }
610 s->rwstate=SSL_NOTHING;
611 s->state=s->s3->tmp.next_state;
612 break;
613
614 case SSL3_ST_CUTTHROUGH_COMPLETE:
615 #ifndef OPENSSL_NO_TLSEXT
616 /* Allow NewSessionTicket if ticket expected */
617 if (s->tlsext_ticket_expected)
618 s->state=SSL3_ST_CR_SESSION_TICKET_A;
619 else
620 #endif
621 s->state=SSL3_ST_CR_FINISHED_A;
622
623 /* SSL_write() will take care of flushing buffered data if
624 * DELAY_CLIENT_FINISHED is set.
625 */
626 if (!(s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED))
627 ssl_free_wbio_buffer(s);
628 ret = 1;
629 goto end;
630 /* break; */
631
632 case SSL_ST_OK:
633 /* clean a few things up */
634 ssl3_cleanup_key_block(s);
635
636 if (s->init_buf != NULL)
637 {
638 BUF_MEM_free(s->init_buf);
639 s->init_buf=NULL;
640 }
641
642 /* If we are not 'joining' the last two packets,
643 * remove the buffering now */
644 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
645 ssl_free_wbio_buffer(s);
646 /* else do it later in ssl3_write */
647
648 s->init_num=0;
649 s->renegotiate=0;
650 s->new_session=0;
651
652 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
653 if (s->hit) s->ctx->stats.sess_hit++;
654
655 ret=1;
656 /* s->server=0; */
657 s->handshake_func=ssl3_connect;
658 s->ctx->stats.sess_connect_good++;
659
660 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
661
662 goto end;
663 /* break; */
664
665 default:
666 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
667 ret= -1;
668 goto end;
669 /* break; */
670 }
671
672 /* did we do anything */
673 if (!s->s3->tmp.reuse_message && !skip)
674 {
675 if (s->debug)
676 {
677 if ((ret=BIO_flush(s->wbio)) <= 0)
678 goto end;
679 }
680
681 if ((cb != NULL) && (s->state != state))
682 {
683 new_state=s->state;
684 s->state=state;
685 cb(s,SSL_CB_CONNECT_LOOP,1);
686 s->state=new_state;
687 }
688 }
689 skip=0;
690 }
691 end:
692 s->in_handshake--;
693 if (buf != NULL)
694 BUF_MEM_free(buf);
695 if (cb != NULL)
696 cb(s,SSL_CB_CONNECT_EXIT,ret);
697 return(ret);
698 }
699
700
ssl3_client_hello(SSL * s)701 int ssl3_client_hello(SSL *s)
702 {
703 unsigned char *buf;
704 unsigned char *p,*d;
705 int i;
706 unsigned long Time,l;
707 #ifndef OPENSSL_NO_COMP
708 int j;
709 SSL_COMP *comp;
710 #endif
711
712 buf=(unsigned char *)s->init_buf->data;
713 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
714 {
715 SSL_SESSION *sess = s->session;
716 if ((sess == NULL) ||
717 (sess->ssl_version != s->version) ||
718 #ifdef OPENSSL_NO_TLSEXT
719 !sess->session_id_length ||
720 #else
721 (!sess->session_id_length && !sess->tlsext_tick) ||
722 #endif
723 (sess->not_resumable))
724 {
725 if (!s->session_creation_enabled)
726 {
727 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
728 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_SESSION_MAY_NOT_BE_CREATED);
729 goto err;
730 }
731 if (!ssl_get_new_session(s,0))
732 goto err;
733 }
734 /* else use the pre-loaded session */
735
736 p=s->s3->client_random;
737 Time=(unsigned long)time(NULL); /* Time */
738 l2n(Time,p);
739 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
740 goto err;
741
742 /* Do the message type and length last */
743 d=p= &(buf[4]);
744
745 /* version indicates the negotiated version: for example from
746 * an SSLv2/v3 compatible client hello). The client_version
747 * field is the maximum version we permit and it is also
748 * used in RSA encrypted premaster secrets. Some servers can
749 * choke if we initially report a higher version then
750 * renegotiate to a lower one in the premaster secret. This
751 * didn't happen with TLS 1.0 as most servers supported it
752 * but it can with TLS 1.1 or later if the server only supports
753 * 1.0.
754 *
755 * Possible scenario with previous logic:
756 * 1. Client hello indicates TLS 1.2
757 * 2. Server hello says TLS 1.0
758 * 3. RSA encrypted premaster secret uses 1.2.
759 * 4. Handhaked proceeds using TLS 1.0.
760 * 5. Server sends hello request to renegotiate.
761 * 6. Client hello indicates TLS v1.0 as we now
762 * know that is maximum server supports.
763 * 7. Server chokes on RSA encrypted premaster secret
764 * containing version 1.0.
765 *
766 * For interoperability it should be OK to always use the
767 * maximum version we support in client hello and then rely
768 * on the checking of version to ensure the servers isn't
769 * being inconsistent: for example initially negotiating with
770 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
771 * client_version in client hello and not resetting it to
772 * the negotiated version.
773 */
774 #if 0
775 *(p++)=s->version>>8;
776 *(p++)=s->version&0xff;
777 s->client_version=s->version;
778 #else
779 *(p++)=s->client_version>>8;
780 *(p++)=s->client_version&0xff;
781 #endif
782
783 /* Random stuff */
784 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
785 p+=SSL3_RANDOM_SIZE;
786
787 /* Session ID */
788 if (s->new_session)
789 i=0;
790 else
791 i=s->session->session_id_length;
792 *(p++)=i;
793 if (i != 0)
794 {
795 if (i > (int)sizeof(s->session->session_id))
796 {
797 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
798 goto err;
799 }
800 memcpy(p,s->session->session_id,i);
801 p+=i;
802 }
803
804 /* Ciphers supported */
805 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
806 if (i == 0)
807 {
808 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
809 goto err;
810 }
811 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
812 /* Some servers hang if client hello > 256 bytes
813 * as hack workaround chop number of supported ciphers
814 * to keep it well below this if we use TLS v1.2
815 */
816 if (TLS1_get_version(s) >= TLS1_2_VERSION
817 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
818 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
819 #endif
820 s2n(i,p);
821 p+=i;
822
823 /* COMPRESSION */
824 #ifdef OPENSSL_NO_COMP
825 *(p++)=1;
826 #else
827
828 if ((s->options & SSL_OP_NO_COMPRESSION)
829 || !s->ctx->comp_methods)
830 j=0;
831 else
832 j=sk_SSL_COMP_num(s->ctx->comp_methods);
833 *(p++)=1+j;
834 for (i=0; i<j; i++)
835 {
836 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
837 *(p++)=comp->id;
838 }
839 #endif
840 *(p++)=0; /* Add the NULL method */
841
842 #ifndef OPENSSL_NO_TLSEXT
843 /* TLS extensions*/
844 if (ssl_prepare_clienthello_tlsext(s) <= 0)
845 {
846 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
847 goto err;
848 }
849 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
850 {
851 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
852 goto err;
853 }
854 #endif
855
856 l=(p-d);
857 d=buf;
858 *(d++)=SSL3_MT_CLIENT_HELLO;
859 l2n3(l,d);
860
861 s->state=SSL3_ST_CW_CLNT_HELLO_B;
862 /* number of bytes to write */
863 s->init_num=p-buf;
864 s->init_off=0;
865 }
866
867 /* SSL3_ST_CW_CLNT_HELLO_B */
868 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
869 err:
870 return(-1);
871 }
872
ssl3_get_server_hello(SSL * s)873 int ssl3_get_server_hello(SSL *s)
874 {
875 STACK_OF(SSL_CIPHER) *sk;
876 const SSL_CIPHER *c;
877 unsigned char *p,*d;
878 int i,al,ok;
879 unsigned int j;
880 long n;
881 #ifndef OPENSSL_NO_COMP
882 SSL_COMP *comp;
883 #endif
884
885 n=s->method->ssl_get_message(s,
886 SSL3_ST_CR_SRVR_HELLO_A,
887 SSL3_ST_CR_SRVR_HELLO_B,
888 -1,
889 20000, /* ?? */
890 &ok);
891
892 if (!ok) return((int)n);
893
894 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
895 {
896 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
897 {
898 if ( s->d1->send_cookie == 0)
899 {
900 s->s3->tmp.reuse_message = 1;
901 return 1;
902 }
903 else /* already sent a cookie */
904 {
905 al=SSL_AD_UNEXPECTED_MESSAGE;
906 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
907 goto f_err;
908 }
909 }
910 }
911
912 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
913 {
914 al=SSL_AD_UNEXPECTED_MESSAGE;
915 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
916 goto f_err;
917 }
918
919 d=p=(unsigned char *)s->init_msg;
920
921 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
922 {
923 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
924 s->version=(s->version&0xff00)|p[1];
925 al=SSL_AD_PROTOCOL_VERSION;
926 goto f_err;
927 }
928 p+=2;
929
930 /* load the server hello data */
931 /* load the server random */
932 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
933 p+=SSL3_RANDOM_SIZE;
934
935 /* get the session-id */
936 j= *(p++);
937
938 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
939 {
940 al=SSL_AD_ILLEGAL_PARAMETER;
941 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
942 goto f_err;
943 }
944
945 #ifndef OPENSSL_NO_TLSEXT
946 /* check if we want to resume the session based on external pre-shared secret */
947 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
948 {
949 SSL_CIPHER *pref_cipher=NULL;
950 s->session->master_key_length=sizeof(s->session->master_key);
951 if (s->tls_session_secret_cb(s, s->session->master_key,
952 &s->session->master_key_length,
953 NULL, &pref_cipher,
954 s->tls_session_secret_cb_arg))
955 {
956 s->session->cipher = pref_cipher ?
957 pref_cipher : ssl_get_cipher_by_char(s, p+j);
958 }
959 }
960 #endif /* OPENSSL_NO_TLSEXT */
961
962 if (j != 0 && j == s->session->session_id_length
963 && memcmp(p,s->session->session_id,j) == 0)
964 {
965 if(s->sid_ctx_length != s->session->sid_ctx_length
966 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
967 {
968 /* actually a client application bug */
969 al=SSL_AD_ILLEGAL_PARAMETER;
970 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
971 goto f_err;
972 }
973 s->hit=1;
974 }
975 else /* a miss or crap from the other end */
976 {
977 /* If we were trying for session-id reuse, make a new
978 * SSL_SESSION so we don't stuff up other people */
979 s->hit=0;
980 if (s->session->session_id_length > 0)
981 {
982 if (!s->session_creation_enabled)
983 {
984 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
985 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SESSION_MAY_NOT_BE_CREATED);
986 goto err;
987 }
988 if (!ssl_get_new_session(s,0))
989 {
990 al=SSL_AD_INTERNAL_ERROR;
991 goto f_err;
992 }
993 }
994 s->session->session_id_length=j;
995 memcpy(s->session->session_id,p,j); /* j could be 0 */
996 }
997 p+=j;
998 c=ssl_get_cipher_by_char(s,p);
999 if (c == NULL)
1000 {
1001 /* unknown cipher */
1002 al=SSL_AD_ILLEGAL_PARAMETER;
1003 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
1004 goto f_err;
1005 }
1006 /* TLS v1.2 only ciphersuites require v1.2 or later */
1007 if ((c->algorithm_ssl & SSL_TLSV1_2) &&
1008 (TLS1_get_version(s) < TLS1_2_VERSION))
1009 {
1010 al=SSL_AD_ILLEGAL_PARAMETER;
1011 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1012 goto f_err;
1013 }
1014 p+=ssl_put_cipher_by_char(s,NULL,NULL);
1015
1016 sk=ssl_get_ciphers_by_id(s);
1017 i=sk_SSL_CIPHER_find(sk,c);
1018 if (i < 0)
1019 {
1020 /* we did not say we would use this cipher */
1021 al=SSL_AD_ILLEGAL_PARAMETER;
1022 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1023 goto f_err;
1024 }
1025
1026 /* Depending on the session caching (internal/external), the cipher
1027 and/or cipher_id values may not be set. Make sure that
1028 cipher_id is set and use it for comparison. */
1029 if (s->session->cipher)
1030 s->session->cipher_id = s->session->cipher->id;
1031 if (s->hit && (s->session->cipher_id != c->id))
1032 {
1033 /* Workaround is now obsolete */
1034 #if 0
1035 if (!(s->options &
1036 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
1037 #endif
1038 {
1039 al=SSL_AD_ILLEGAL_PARAMETER;
1040 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1041 goto f_err;
1042 }
1043 }
1044 s->s3->tmp.new_cipher=c;
1045 /* Don't digest cached records if TLS v1.2: we may need them for
1046 * client authentication.
1047 */
1048 if (TLS1_get_version(s) < TLS1_2_VERSION && !ssl3_digest_cached_records(s))
1049 goto f_err;
1050 /* lets get the compression algorithm */
1051 /* COMPRESSION */
1052 #ifdef OPENSSL_NO_COMP
1053 if (*(p++) != 0)
1054 {
1055 al=SSL_AD_ILLEGAL_PARAMETER;
1056 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1057 goto f_err;
1058 }
1059 /* If compression is disabled we'd better not try to resume a session
1060 * using compression.
1061 */
1062 if (s->session->compress_meth != 0)
1063 {
1064 al=SSL_AD_INTERNAL_ERROR;
1065 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1066 goto f_err;
1067 }
1068 #else
1069 j= *(p++);
1070 if (s->hit && j != s->session->compress_meth)
1071 {
1072 al=SSL_AD_ILLEGAL_PARAMETER;
1073 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1074 goto f_err;
1075 }
1076 if (j == 0)
1077 comp=NULL;
1078 else if (s->options & SSL_OP_NO_COMPRESSION)
1079 {
1080 al=SSL_AD_ILLEGAL_PARAMETER;
1081 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1082 goto f_err;
1083 }
1084 else
1085 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1086
1087 if ((j != 0) && (comp == NULL))
1088 {
1089 al=SSL_AD_ILLEGAL_PARAMETER;
1090 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1091 goto f_err;
1092 }
1093 else
1094 {
1095 s->s3->tmp.new_compression=comp;
1096 }
1097 #endif
1098
1099 #ifndef OPENSSL_NO_TLSEXT
1100 /* TLS extensions*/
1101 if (s->version >= SSL3_VERSION)
1102 {
1103 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al))
1104 {
1105 /* 'al' set by ssl_parse_serverhello_tlsext */
1106 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1107 goto f_err;
1108 }
1109 if (ssl_check_serverhello_tlsext(s) <= 0)
1110 {
1111 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT);
1112 goto err;
1113 }
1114 }
1115 #endif
1116
1117 if (p != (d+n))
1118 {
1119 /* wrong packet length */
1120 al=SSL_AD_DECODE_ERROR;
1121 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1122 goto f_err;
1123 }
1124
1125 return(1);
1126 f_err:
1127 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1128 err:
1129 return(-1);
1130 }
1131
ssl3_get_server_certificate(SSL * s)1132 int ssl3_get_server_certificate(SSL *s)
1133 {
1134 int al,i,ok,ret= -1;
1135 unsigned long n,nc,llen,l;
1136 X509 *x=NULL;
1137 const unsigned char *q,*p;
1138 unsigned char *d;
1139 STACK_OF(X509) *sk=NULL;
1140 SESS_CERT *sc;
1141 EVP_PKEY *pkey=NULL;
1142 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1143
1144 n=s->method->ssl_get_message(s,
1145 SSL3_ST_CR_CERT_A,
1146 SSL3_ST_CR_CERT_B,
1147 -1,
1148 s->max_cert_list,
1149 &ok);
1150
1151 if (!ok) return((int)n);
1152
1153 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1154 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1155 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1156 {
1157 s->s3->tmp.reuse_message=1;
1158 return(1);
1159 }
1160
1161 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1162 {
1163 al=SSL_AD_UNEXPECTED_MESSAGE;
1164 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1165 goto f_err;
1166 }
1167 p=d=(unsigned char *)s->init_msg;
1168
1169 if ((sk=sk_X509_new_null()) == NULL)
1170 {
1171 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1172 goto err;
1173 }
1174
1175 n2l3(p,llen);
1176 if (llen+3 != n)
1177 {
1178 al=SSL_AD_DECODE_ERROR;
1179 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1180 goto f_err;
1181 }
1182 for (nc=0; nc<llen; )
1183 {
1184 n2l3(p,l);
1185 if ((l+nc+3) > llen)
1186 {
1187 al=SSL_AD_DECODE_ERROR;
1188 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1189 goto f_err;
1190 }
1191
1192 q=p;
1193 x=d2i_X509(NULL,&q,l);
1194 if (x == NULL)
1195 {
1196 al=SSL_AD_BAD_CERTIFICATE;
1197 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1198 goto f_err;
1199 }
1200 if (q != (p+l))
1201 {
1202 al=SSL_AD_DECODE_ERROR;
1203 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1204 goto f_err;
1205 }
1206 if (!sk_X509_push(sk,x))
1207 {
1208 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1209 goto err;
1210 }
1211 x=NULL;
1212 nc+=l+3;
1213 p=q;
1214 }
1215
1216 i=ssl_verify_cert_chain(s,sk);
1217 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1218 #ifndef OPENSSL_NO_KRB5
1219 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1220 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1221 #endif /* OPENSSL_NO_KRB5 */
1222 )
1223 {
1224 al=ssl_verify_alarm_type(s->verify_result);
1225 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1226 goto f_err;
1227 }
1228 ERR_clear_error(); /* but we keep s->verify_result */
1229
1230 sc=ssl_sess_cert_new();
1231 if (sc == NULL) goto err;
1232
1233 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1234 s->session->sess_cert=sc;
1235
1236 sc->cert_chain=sk;
1237 /* Inconsistency alert: cert_chain does include the peer's
1238 * certificate, which we don't include in s3_srvr.c */
1239 x=sk_X509_value(sk,0);
1240 sk=NULL;
1241 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1242
1243 pkey=X509_get_pubkey(x);
1244
1245 /* VRS: allow null cert if auth == KRB5 */
1246 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1247 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1248 ? 0 : 1;
1249
1250 #ifdef KSSL_DEBUG
1251 printf("pkey,x = %p, %p\n", pkey,x);
1252 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1253 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1254 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1255 #endif /* KSSL_DEBUG */
1256
1257 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1258 {
1259 x=NULL;
1260 al=SSL3_AL_FATAL;
1261 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1262 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1263 goto f_err;
1264 }
1265
1266 i=ssl_cert_type(x,pkey);
1267 if (need_cert && i < 0)
1268 {
1269 x=NULL;
1270 al=SSL3_AL_FATAL;
1271 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1272 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1273 goto f_err;
1274 }
1275
1276 if (need_cert)
1277 {
1278 sc->peer_cert_type=i;
1279 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1280 /* Why would the following ever happen?
1281 * We just created sc a couple of lines ago. */
1282 if (sc->peer_pkeys[i].x509 != NULL)
1283 X509_free(sc->peer_pkeys[i].x509);
1284 sc->peer_pkeys[i].x509=x;
1285 sc->peer_key= &(sc->peer_pkeys[i]);
1286
1287 if (s->session->peer != NULL)
1288 X509_free(s->session->peer);
1289 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1290 s->session->peer=x;
1291 }
1292 else
1293 {
1294 sc->peer_cert_type=i;
1295 sc->peer_key= NULL;
1296
1297 if (s->session->peer != NULL)
1298 X509_free(s->session->peer);
1299 s->session->peer=NULL;
1300 }
1301 s->session->verify_result = s->verify_result;
1302
1303 x=NULL;
1304 ret=1;
1305
1306 if (0)
1307 {
1308 f_err:
1309 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1310 }
1311 err:
1312 EVP_PKEY_free(pkey);
1313 X509_free(x);
1314 sk_X509_pop_free(sk,X509_free);
1315 return(ret);
1316 }
1317
ssl3_get_key_exchange(SSL * s)1318 int ssl3_get_key_exchange(SSL *s)
1319 {
1320 #ifndef OPENSSL_NO_RSA
1321 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1322 #endif
1323 EVP_MD_CTX md_ctx;
1324 unsigned char *param,*p;
1325 int al,i,j,param_len,ok;
1326 long n,alg_k,alg_a;
1327 EVP_PKEY *pkey=NULL;
1328 const EVP_MD *md = NULL;
1329 #ifndef OPENSSL_NO_RSA
1330 RSA *rsa=NULL;
1331 #endif
1332 #ifndef OPENSSL_NO_DH
1333 DH *dh=NULL;
1334 #endif
1335 #ifndef OPENSSL_NO_ECDH
1336 EC_KEY *ecdh = NULL;
1337 BN_CTX *bn_ctx = NULL;
1338 EC_POINT *srvr_ecpoint = NULL;
1339 int curve_nid = 0;
1340 int encoded_pt_len = 0;
1341 #endif
1342
1343 /* use same message size as in ssl3_get_certificate_request()
1344 * as ServerKeyExchange message may be skipped */
1345 n=s->method->ssl_get_message(s,
1346 SSL3_ST_CR_KEY_EXCH_A,
1347 SSL3_ST_CR_KEY_EXCH_B,
1348 -1,
1349 s->max_cert_list,
1350 &ok);
1351 if (!ok) return((int)n);
1352
1353 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1354 {
1355 #ifndef OPENSSL_NO_PSK
1356 /* In plain PSK ciphersuite, ServerKeyExchange can be
1357 omitted if no identity hint is sent. Set
1358 session->sess_cert anyway to avoid problems
1359 later.*/
1360 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1361 {
1362 s->session->sess_cert=ssl_sess_cert_new();
1363 if (s->ctx->psk_identity_hint)
1364 OPENSSL_free(s->ctx->psk_identity_hint);
1365 s->ctx->psk_identity_hint = NULL;
1366 }
1367 #endif
1368 s->s3->tmp.reuse_message=1;
1369 return(1);
1370 }
1371
1372 param=p=(unsigned char *)s->init_msg;
1373 if (s->session->sess_cert != NULL)
1374 {
1375 #ifndef OPENSSL_NO_RSA
1376 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1377 {
1378 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1379 s->session->sess_cert->peer_rsa_tmp=NULL;
1380 }
1381 #endif
1382 #ifndef OPENSSL_NO_DH
1383 if (s->session->sess_cert->peer_dh_tmp)
1384 {
1385 DH_free(s->session->sess_cert->peer_dh_tmp);
1386 s->session->sess_cert->peer_dh_tmp=NULL;
1387 }
1388 #endif
1389 #ifndef OPENSSL_NO_ECDH
1390 if (s->session->sess_cert->peer_ecdh_tmp)
1391 {
1392 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1393 s->session->sess_cert->peer_ecdh_tmp=NULL;
1394 }
1395 #endif
1396 }
1397 else
1398 {
1399 s->session->sess_cert=ssl_sess_cert_new();
1400 }
1401
1402 param_len=0;
1403 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1404 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1405 EVP_MD_CTX_init(&md_ctx);
1406
1407 #ifndef OPENSSL_NO_PSK
1408 if (alg_k & SSL_kPSK)
1409 {
1410 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1411
1412 al=SSL_AD_HANDSHAKE_FAILURE;
1413 n2s(p,i);
1414 param_len=i+2;
1415 /* Store PSK identity hint for later use, hint is used
1416 * in ssl3_send_client_key_exchange. Assume that the
1417 * maximum length of a PSK identity hint can be as
1418 * long as the maximum length of a PSK identity. */
1419 if (i > PSK_MAX_IDENTITY_LEN)
1420 {
1421 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1422 SSL_R_DATA_LENGTH_TOO_LONG);
1423 goto f_err;
1424 }
1425 if (param_len > n)
1426 {
1427 al=SSL_AD_DECODE_ERROR;
1428 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1429 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1430 goto f_err;
1431 }
1432 /* If received PSK identity hint contains NULL
1433 * characters, the hint is truncated from the first
1434 * NULL. p may not be ending with NULL, so create a
1435 * NULL-terminated string. */
1436 memcpy(tmp_id_hint, p, i);
1437 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1438 if (s->ctx->psk_identity_hint != NULL)
1439 OPENSSL_free(s->ctx->psk_identity_hint);
1440 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1441 if (s->ctx->psk_identity_hint == NULL)
1442 {
1443 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1444 goto f_err;
1445 }
1446
1447 p+=i;
1448 n-=param_len;
1449 }
1450 else
1451 #endif /* !OPENSSL_NO_PSK */
1452 #ifndef OPENSSL_NO_SRP
1453 if (alg_k & SSL_kSRP)
1454 {
1455 n2s(p,i);
1456 param_len=i+2;
1457 if (param_len > n)
1458 {
1459 al=SSL_AD_DECODE_ERROR;
1460 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1461 goto f_err;
1462 }
1463 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1464 {
1465 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1466 goto err;
1467 }
1468 p+=i;
1469
1470 n2s(p,i);
1471 param_len+=i+2;
1472 if (param_len > n)
1473 {
1474 al=SSL_AD_DECODE_ERROR;
1475 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1476 goto f_err;
1477 }
1478 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1479 {
1480 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1481 goto err;
1482 }
1483 p+=i;
1484
1485 i = (unsigned int)(p[0]);
1486 p++;
1487 param_len+=i+1;
1488 if (param_len > n)
1489 {
1490 al=SSL_AD_DECODE_ERROR;
1491 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1492 goto f_err;
1493 }
1494 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1495 {
1496 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1497 goto err;
1498 }
1499 p+=i;
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_SRP_B_LENGTH);
1507 goto f_err;
1508 }
1509 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1510 {
1511 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1512 goto err;
1513 }
1514 p+=i;
1515 n-=param_len;
1516
1517 /* We must check if there is a certificate */
1518 #ifndef OPENSSL_NO_RSA
1519 if (alg_a & SSL_aRSA)
1520 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1521 #else
1522 if (0)
1523 ;
1524 #endif
1525 #ifndef OPENSSL_NO_DSA
1526 else if (alg_a & SSL_aDSS)
1527 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1528 #endif
1529 }
1530 else
1531 #endif /* !OPENSSL_NO_SRP */
1532 #ifndef OPENSSL_NO_RSA
1533 if (alg_k & SSL_kRSA)
1534 {
1535 if ((rsa=RSA_new()) == NULL)
1536 {
1537 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1538 goto err;
1539 }
1540 n2s(p,i);
1541 param_len=i+2;
1542 if (param_len > n)
1543 {
1544 al=SSL_AD_DECODE_ERROR;
1545 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1546 goto f_err;
1547 }
1548 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1549 {
1550 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1551 goto err;
1552 }
1553 p+=i;
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_RSA_E_LENGTH);
1561 goto f_err;
1562 }
1563 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1564 {
1565 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1566 goto err;
1567 }
1568 p+=i;
1569 n-=param_len;
1570
1571 /* this should be because we are using an export cipher */
1572 if (alg_a & SSL_aRSA)
1573 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1574 else
1575 {
1576 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1577 goto err;
1578 }
1579 s->session->sess_cert->peer_rsa_tmp=rsa;
1580 rsa=NULL;
1581 }
1582 #else /* OPENSSL_NO_RSA */
1583 if (0)
1584 ;
1585 #endif
1586 #ifndef OPENSSL_NO_DH
1587 else if (alg_k & SSL_kEDH)
1588 {
1589 if ((dh=DH_new()) == NULL)
1590 {
1591 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1592 goto err;
1593 }
1594 n2s(p,i);
1595 param_len=i+2;
1596 if (param_len > n)
1597 {
1598 al=SSL_AD_DECODE_ERROR;
1599 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1600 goto f_err;
1601 }
1602 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1603 {
1604 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1605 goto err;
1606 }
1607 p+=i;
1608
1609 n2s(p,i);
1610 param_len+=i+2;
1611 if (param_len > n)
1612 {
1613 al=SSL_AD_DECODE_ERROR;
1614 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1615 goto f_err;
1616 }
1617 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1618 {
1619 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1620 goto err;
1621 }
1622 p+=i;
1623
1624 n2s(p,i);
1625 param_len+=i+2;
1626 if (param_len > n)
1627 {
1628 al=SSL_AD_DECODE_ERROR;
1629 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1630 goto f_err;
1631 }
1632 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1633 {
1634 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1635 goto err;
1636 }
1637 p+=i;
1638 n-=param_len;
1639
1640 #ifndef OPENSSL_NO_RSA
1641 if (alg_a & SSL_aRSA)
1642 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1643 #else
1644 if (0)
1645 ;
1646 #endif
1647 #ifndef OPENSSL_NO_DSA
1648 else if (alg_a & SSL_aDSS)
1649 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1650 #endif
1651 /* else anonymous DH, so no certificate or pkey. */
1652
1653 s->session->sess_cert->peer_dh_tmp=dh;
1654 dh=NULL;
1655 }
1656 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1657 {
1658 al=SSL_AD_ILLEGAL_PARAMETER;
1659 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1660 goto f_err;
1661 }
1662 #endif /* !OPENSSL_NO_DH */
1663
1664 #ifndef OPENSSL_NO_ECDH
1665 else if (alg_k & SSL_kEECDH)
1666 {
1667 EC_GROUP *ngroup;
1668 const EC_GROUP *group;
1669
1670 if ((ecdh=EC_KEY_new()) == NULL)
1671 {
1672 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1673 goto err;
1674 }
1675
1676 /* Extract elliptic curve parameters and the
1677 * server's ephemeral ECDH public key.
1678 * Keep accumulating lengths of various components in
1679 * param_len and make sure it never exceeds n.
1680 */
1681
1682 /* XXX: For now we only support named (not generic) curves
1683 * and the ECParameters in this case is just three bytes.
1684 */
1685 param_len=3;
1686 if ((param_len > n) ||
1687 (*p != NAMED_CURVE_TYPE) ||
1688 ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0))
1689 {
1690 al=SSL_AD_INTERNAL_ERROR;
1691 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1692 goto f_err;
1693 }
1694
1695 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1696 if (ngroup == NULL)
1697 {
1698 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1699 goto err;
1700 }
1701 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1702 {
1703 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1704 goto err;
1705 }
1706 EC_GROUP_free(ngroup);
1707
1708 group = EC_KEY_get0_group(ecdh);
1709
1710 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1711 (EC_GROUP_get_degree(group) > 163))
1712 {
1713 al=SSL_AD_EXPORT_RESTRICTION;
1714 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1715 goto f_err;
1716 }
1717
1718 p+=3;
1719
1720 /* Next, get the encoded ECPoint */
1721 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1722 ((bn_ctx = BN_CTX_new()) == NULL))
1723 {
1724 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1725 goto err;
1726 }
1727
1728 encoded_pt_len = *p; /* length of encoded point */
1729 p+=1;
1730 param_len += (1 + encoded_pt_len);
1731 if ((param_len > n) ||
1732 (EC_POINT_oct2point(group, srvr_ecpoint,
1733 p, encoded_pt_len, bn_ctx) == 0))
1734 {
1735 al=SSL_AD_DECODE_ERROR;
1736 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1737 goto f_err;
1738 }
1739
1740 n-=param_len;
1741 p+=encoded_pt_len;
1742
1743 /* The ECC/TLS specification does not mention
1744 * the use of DSA to sign ECParameters in the server
1745 * key exchange message. We do support RSA and ECDSA.
1746 */
1747 if (0) ;
1748 #ifndef OPENSSL_NO_RSA
1749 else if (alg_a & SSL_aRSA)
1750 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1751 #endif
1752 #ifndef OPENSSL_NO_ECDSA
1753 else if (alg_a & SSL_aECDSA)
1754 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1755 #endif
1756 /* else anonymous ECDH, so no certificate or pkey. */
1757 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1758 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1759 ecdh=NULL;
1760 BN_CTX_free(bn_ctx);
1761 bn_ctx = NULL;
1762 EC_POINT_free(srvr_ecpoint);
1763 srvr_ecpoint = NULL;
1764 }
1765 else if (alg_k)
1766 {
1767 al=SSL_AD_UNEXPECTED_MESSAGE;
1768 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1769 goto f_err;
1770 }
1771 #endif /* !OPENSSL_NO_ECDH */
1772
1773
1774 /* p points to the next byte, there are 'n' bytes left */
1775
1776 /* if it was signed, check the signature */
1777 if (pkey != NULL)
1778 {
1779 if (TLS1_get_version(s) >= TLS1_2_VERSION)
1780 {
1781 int sigalg = tls12_get_sigid(pkey);
1782 /* Should never happen */
1783 if (sigalg == -1)
1784 {
1785 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1786 goto err;
1787 }
1788 /* Check key type is consistent with signature */
1789 if (sigalg != (int)p[1])
1790 {
1791 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_TYPE);
1792 al=SSL_AD_DECODE_ERROR;
1793 goto f_err;
1794 }
1795 md = tls12_get_hash(p[0]);
1796 if (md == NULL)
1797 {
1798 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNKNOWN_DIGEST);
1799 al=SSL_AD_DECODE_ERROR;
1800 goto f_err;
1801 }
1802 #ifdef SSL_DEBUG
1803 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1804 #endif
1805 p += 2;
1806 n -= 2;
1807 }
1808 else
1809 md = EVP_sha1();
1810
1811 n2s(p,i);
1812 n-=2;
1813 j=EVP_PKEY_size(pkey);
1814
1815 if ((i != n) || (n > j) || (n <= 0))
1816 {
1817 /* wrong packet length */
1818 al=SSL_AD_DECODE_ERROR;
1819 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1820 goto f_err;
1821 }
1822
1823 #ifndef OPENSSL_NO_RSA
1824 if (pkey->type == EVP_PKEY_RSA && TLS1_get_version(s) < TLS1_2_VERSION)
1825 {
1826 int num;
1827
1828 j=0;
1829 q=md_buf;
1830 for (num=2; num > 0; num--)
1831 {
1832 EVP_MD_CTX_set_flags(&md_ctx,
1833 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1834 EVP_DigestInit_ex(&md_ctx,(num == 2)
1835 ?s->ctx->md5:s->ctx->sha1, NULL);
1836 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1837 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1838 EVP_DigestUpdate(&md_ctx,param,param_len);
1839 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1840 q+=i;
1841 j+=i;
1842 }
1843 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1844 pkey->pkey.rsa);
1845 if (i < 0)
1846 {
1847 al=SSL_AD_DECRYPT_ERROR;
1848 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1849 goto f_err;
1850 }
1851 if (i == 0)
1852 {
1853 /* bad signature */
1854 al=SSL_AD_DECRYPT_ERROR;
1855 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1856 goto f_err;
1857 }
1858 }
1859 else
1860 #endif
1861 {
1862 EVP_VerifyInit_ex(&md_ctx, md, NULL);
1863 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1864 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1865 EVP_VerifyUpdate(&md_ctx,param,param_len);
1866 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1867 {
1868 /* bad signature */
1869 al=SSL_AD_DECRYPT_ERROR;
1870 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1871 goto f_err;
1872 }
1873 }
1874 }
1875 else
1876 {
1877 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
1878 /* aNULL or kPSK do not need public keys */
1879 {
1880 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1881 goto err;
1882 }
1883 /* still data left over */
1884 if (n != 0)
1885 {
1886 al=SSL_AD_DECODE_ERROR;
1887 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1888 goto f_err;
1889 }
1890 }
1891 EVP_PKEY_free(pkey);
1892 EVP_MD_CTX_cleanup(&md_ctx);
1893 return(1);
1894 f_err:
1895 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1896 err:
1897 EVP_PKEY_free(pkey);
1898 #ifndef OPENSSL_NO_RSA
1899 if (rsa != NULL)
1900 RSA_free(rsa);
1901 #endif
1902 #ifndef OPENSSL_NO_DH
1903 if (dh != NULL)
1904 DH_free(dh);
1905 #endif
1906 #ifndef OPENSSL_NO_ECDH
1907 BN_CTX_free(bn_ctx);
1908 EC_POINT_free(srvr_ecpoint);
1909 if (ecdh != NULL)
1910 EC_KEY_free(ecdh);
1911 #endif
1912 EVP_MD_CTX_cleanup(&md_ctx);
1913 return(-1);
1914 }
1915
ssl3_get_certificate_request(SSL * s)1916 int ssl3_get_certificate_request(SSL *s)
1917 {
1918 int ok,ret=0;
1919 unsigned long n,nc,l;
1920 unsigned int llen, ctype_num,i;
1921 X509_NAME *xn=NULL;
1922 const unsigned char *p,*q;
1923 unsigned char *d;
1924 STACK_OF(X509_NAME) *ca_sk=NULL;
1925
1926 n=s->method->ssl_get_message(s,
1927 SSL3_ST_CR_CERT_REQ_A,
1928 SSL3_ST_CR_CERT_REQ_B,
1929 -1,
1930 s->max_cert_list,
1931 &ok);
1932
1933 if (!ok) return((int)n);
1934
1935 s->s3->tmp.cert_req=0;
1936
1937 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1938 {
1939 s->s3->tmp.reuse_message=1;
1940 /* If we get here we don't need any cached handshake records
1941 * as we wont be doing client auth.
1942 */
1943 if (s->s3->handshake_buffer)
1944 {
1945 if (!ssl3_digest_cached_records(s))
1946 goto err;
1947 }
1948 return(1);
1949 }
1950
1951 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1952 {
1953 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1954 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1955 goto err;
1956 }
1957
1958 /* TLS does not like anon-DH with client cert */
1959 if (s->version > SSL3_VERSION)
1960 {
1961 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
1962 {
1963 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1964 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1965 goto err;
1966 }
1967 }
1968
1969 p=d=(unsigned char *)s->init_msg;
1970
1971 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1972 {
1973 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1974 goto err;
1975 }
1976
1977 /* get the certificate types */
1978 ctype_num= *(p++);
1979 if (ctype_num > SSL3_CT_NUMBER)
1980 ctype_num=SSL3_CT_NUMBER;
1981 for (i=0; i<ctype_num; i++)
1982 s->s3->tmp.ctype[i]= p[i];
1983 p+=ctype_num;
1984 if (TLS1_get_version(s) >= TLS1_2_VERSION)
1985 {
1986 n2s(p, llen);
1987 /* Check we have enough room for signature algorithms and
1988 * following length value.
1989 */
1990 if ((unsigned long)(p - d + llen + 2) > n)
1991 {
1992 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1993 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
1994 goto err;
1995 }
1996 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen))
1997 {
1998 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1999 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2000 goto err;
2001 }
2002 p += llen;
2003 }
2004
2005 /* get the CA RDNs */
2006 n2s(p,llen);
2007 #if 0
2008 {
2009 FILE *out;
2010 out=fopen("/tmp/vsign.der","w");
2011 fwrite(p,1,llen,out);
2012 fclose(out);
2013 }
2014 #endif
2015
2016 if ((unsigned long)(p - d + llen) != n)
2017 {
2018 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2019 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
2020 goto err;
2021 }
2022
2023 for (nc=0; nc<llen; )
2024 {
2025 n2s(p,l);
2026 if ((l+nc+2) > llen)
2027 {
2028 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
2029 goto cont; /* netscape bugs */
2030 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2031 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
2032 goto err;
2033 }
2034
2035 q=p;
2036
2037 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
2038 {
2039 /* If netscape tolerance is on, ignore errors */
2040 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
2041 goto cont;
2042 else
2043 {
2044 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2045 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
2046 goto err;
2047 }
2048 }
2049
2050 if (q != (p+l))
2051 {
2052 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2053 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
2054 goto err;
2055 }
2056 if (!sk_X509_NAME_push(ca_sk,xn))
2057 {
2058 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2059 goto err;
2060 }
2061
2062 p+=l;
2063 nc+=l+2;
2064 }
2065
2066 if (0)
2067 {
2068 cont:
2069 ERR_clear_error();
2070 }
2071
2072 /* we should setup a certificate to return.... */
2073 s->s3->tmp.cert_req=1;
2074 s->s3->tmp.ctype_num=ctype_num;
2075 if (s->s3->tmp.ca_names != NULL)
2076 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2077 s->s3->tmp.ca_names=ca_sk;
2078 ca_sk=NULL;
2079
2080 ret=1;
2081 err:
2082 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2083 return(ret);
2084 }
2085
ca_dn_cmp(const X509_NAME * const * a,const X509_NAME * const * b)2086 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2087 {
2088 return(X509_NAME_cmp(*a,*b));
2089 }
2090 #ifndef OPENSSL_NO_TLSEXT
ssl3_get_new_session_ticket(SSL * s)2091 int ssl3_get_new_session_ticket(SSL *s)
2092 {
2093 int ok,al,ret=0, ticklen;
2094 long n;
2095 const unsigned char *p;
2096 unsigned char *d;
2097
2098 n=s->method->ssl_get_message(s,
2099 SSL3_ST_CR_SESSION_TICKET_A,
2100 SSL3_ST_CR_SESSION_TICKET_B,
2101 -1,
2102 16384,
2103 &ok);
2104
2105 if (!ok)
2106 return((int)n);
2107
2108 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
2109 {
2110 s->s3->tmp.reuse_message=1;
2111 return(1);
2112 }
2113 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
2114 {
2115 al=SSL_AD_UNEXPECTED_MESSAGE;
2116 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2117 goto f_err;
2118 }
2119 if (n < 6)
2120 {
2121 /* need at least ticket_lifetime_hint + ticket length */
2122 al = SSL_AD_DECODE_ERROR;
2123 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2124 goto f_err;
2125 }
2126
2127 p=d=(unsigned char *)s->init_msg;
2128 n2l(p, s->session->tlsext_tick_lifetime_hint);
2129 n2s(p, ticklen);
2130 /* ticket_lifetime_hint + ticket_length + ticket */
2131 if (ticklen + 6 != n)
2132 {
2133 al = SSL_AD_DECODE_ERROR;
2134 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2135 goto f_err;
2136 }
2137 if (s->session->tlsext_tick)
2138 {
2139 OPENSSL_free(s->session->tlsext_tick);
2140 s->session->tlsext_ticklen = 0;
2141 }
2142 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2143 if (!s->session->tlsext_tick)
2144 {
2145 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2146 goto err;
2147 }
2148 memcpy(s->session->tlsext_tick, p, ticklen);
2149 s->session->tlsext_ticklen = ticklen;
2150 /* There are two ways to detect a resumed ticket sesion.
2151 * One is to set an appropriate session ID and then the server
2152 * must return a match in ServerHello. This allows the normal
2153 * client session ID matching to work and we know much
2154 * earlier that the ticket has been accepted.
2155 *
2156 * The other way is to set zero length session ID when the
2157 * ticket is presented and rely on the handshake to determine
2158 * session resumption.
2159 *
2160 * We choose the former approach because this fits in with
2161 * assumptions elsewhere in OpenSSL. The session ID is set
2162 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2163 * ticket.
2164 */
2165 EVP_Digest(p, ticklen,
2166 s->session->session_id, &s->session->session_id_length,
2167 #ifndef OPENSSL_NO_SHA256
2168 EVP_sha256(), NULL);
2169 #else
2170 EVP_sha1(), NULL);
2171 #endif
2172 ret=1;
2173 return(ret);
2174 f_err:
2175 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2176 err:
2177 return(-1);
2178 }
2179
ssl3_get_cert_status(SSL * s)2180 int ssl3_get_cert_status(SSL *s)
2181 {
2182 int ok, al;
2183 unsigned long resplen,n;
2184 const unsigned char *p;
2185
2186 n=s->method->ssl_get_message(s,
2187 SSL3_ST_CR_CERT_STATUS_A,
2188 SSL3_ST_CR_CERT_STATUS_B,
2189 SSL3_MT_CERTIFICATE_STATUS,
2190 16384,
2191 &ok);
2192
2193 if (!ok) return((int)n);
2194 if (n < 4)
2195 {
2196 /* need at least status type + length */
2197 al = SSL_AD_DECODE_ERROR;
2198 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2199 goto f_err;
2200 }
2201 p = (unsigned char *)s->init_msg;
2202 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2203 {
2204 al = SSL_AD_DECODE_ERROR;
2205 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2206 goto f_err;
2207 }
2208 n2l3(p, resplen);
2209 if (resplen + 4 != n)
2210 {
2211 al = SSL_AD_DECODE_ERROR;
2212 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2213 goto f_err;
2214 }
2215 if (s->tlsext_ocsp_resp)
2216 OPENSSL_free(s->tlsext_ocsp_resp);
2217 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2218 if (!s->tlsext_ocsp_resp)
2219 {
2220 al = SSL_AD_INTERNAL_ERROR;
2221 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2222 goto f_err;
2223 }
2224 s->tlsext_ocsp_resplen = resplen;
2225 if (s->ctx->tlsext_status_cb)
2226 {
2227 int ret;
2228 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2229 if (ret == 0)
2230 {
2231 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2232 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2233 goto f_err;
2234 }
2235 if (ret < 0)
2236 {
2237 al = SSL_AD_INTERNAL_ERROR;
2238 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2239 goto f_err;
2240 }
2241 }
2242 return 1;
2243 f_err:
2244 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2245 return(-1);
2246 }
2247 #endif
2248
ssl3_get_server_done(SSL * s)2249 int ssl3_get_server_done(SSL *s)
2250 {
2251 int ok,ret=0;
2252 long n;
2253
2254 n=s->method->ssl_get_message(s,
2255 SSL3_ST_CR_SRVR_DONE_A,
2256 SSL3_ST_CR_SRVR_DONE_B,
2257 SSL3_MT_SERVER_DONE,
2258 30, /* should be very small, like 0 :-) */
2259 &ok);
2260
2261 if (!ok) return((int)n);
2262 if (n > 0)
2263 {
2264 /* should contain no data */
2265 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2266 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2267 return -1;
2268 }
2269 ret=1;
2270 return(ret);
2271 }
2272
2273
ssl3_send_client_key_exchange(SSL * s)2274 int ssl3_send_client_key_exchange(SSL *s)
2275 {
2276 unsigned char *p,*d;
2277 int n;
2278 unsigned long alg_k;
2279 #ifndef OPENSSL_NO_RSA
2280 unsigned char *q;
2281 EVP_PKEY *pkey=NULL;
2282 #endif
2283 #ifndef OPENSSL_NO_KRB5
2284 KSSL_ERR kssl_err;
2285 #endif /* OPENSSL_NO_KRB5 */
2286 #ifndef OPENSSL_NO_ECDH
2287 EC_KEY *clnt_ecdh = NULL;
2288 const EC_POINT *srvr_ecpoint = NULL;
2289 EVP_PKEY *srvr_pub_pkey = NULL;
2290 unsigned char *encodedPoint = NULL;
2291 int encoded_pt_len = 0;
2292 BN_CTX * bn_ctx = NULL;
2293 #endif
2294
2295 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2296 {
2297 d=(unsigned char *)s->init_buf->data;
2298 p= &(d[4]);
2299
2300 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2301
2302 /* Fool emacs indentation */
2303 if (0) {}
2304 #ifndef OPENSSL_NO_RSA
2305 else if (alg_k & SSL_kRSA)
2306 {
2307 RSA *rsa;
2308 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2309
2310 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2311 rsa=s->session->sess_cert->peer_rsa_tmp;
2312 else
2313 {
2314 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2315 if ((pkey == NULL) ||
2316 (pkey->type != EVP_PKEY_RSA) ||
2317 (pkey->pkey.rsa == NULL))
2318 {
2319 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2320 goto err;
2321 }
2322 rsa=pkey->pkey.rsa;
2323 EVP_PKEY_free(pkey);
2324 }
2325
2326 tmp_buf[0]=s->client_version>>8;
2327 tmp_buf[1]=s->client_version&0xff;
2328 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2329 goto err;
2330
2331 s->session->master_key_length=sizeof tmp_buf;
2332
2333 q=p;
2334 /* Fix buf for TLS and beyond */
2335 if (s->version > SSL3_VERSION)
2336 p+=2;
2337 n=RSA_public_encrypt(sizeof tmp_buf,
2338 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2339 #ifdef PKCS1_CHECK
2340 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2341 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2342 #endif
2343 if (n <= 0)
2344 {
2345 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2346 goto err;
2347 }
2348
2349 /* Fix buf for TLS and beyond */
2350 if (s->version > SSL3_VERSION)
2351 {
2352 s2n(n,q);
2353 n+=2;
2354 }
2355
2356 s->session->master_key_length=
2357 s->method->ssl3_enc->generate_master_secret(s,
2358 s->session->master_key,
2359 tmp_buf,sizeof tmp_buf);
2360 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2361 }
2362 #endif
2363 #ifndef OPENSSL_NO_KRB5
2364 else if (alg_k & SSL_kKRB5)
2365 {
2366 krb5_error_code krb5rc;
2367 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2368 /* krb5_data krb5_ap_req; */
2369 krb5_data *enc_ticket;
2370 krb5_data authenticator, *authp = NULL;
2371 EVP_CIPHER_CTX ciph_ctx;
2372 const EVP_CIPHER *enc = NULL;
2373 unsigned char iv[EVP_MAX_IV_LENGTH];
2374 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2375 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2376 + EVP_MAX_IV_LENGTH];
2377 int padl, outl = sizeof(epms);
2378
2379 EVP_CIPHER_CTX_init(&ciph_ctx);
2380
2381 #ifdef KSSL_DEBUG
2382 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2383 alg_k, SSL_kKRB5);
2384 #endif /* KSSL_DEBUG */
2385
2386 authp = NULL;
2387 #ifdef KRB5SENDAUTH
2388 if (KRB5SENDAUTH) authp = &authenticator;
2389 #endif /* KRB5SENDAUTH */
2390
2391 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2392 &kssl_err);
2393 enc = kssl_map_enc(kssl_ctx->enctype);
2394 if (enc == NULL)
2395 goto err;
2396 #ifdef KSSL_DEBUG
2397 {
2398 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2399 if (krb5rc && kssl_err.text)
2400 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2401 }
2402 #endif /* KSSL_DEBUG */
2403
2404 if (krb5rc)
2405 {
2406 ssl3_send_alert(s,SSL3_AL_FATAL,
2407 SSL_AD_HANDSHAKE_FAILURE);
2408 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2409 kssl_err.reason);
2410 goto err;
2411 }
2412
2413 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2414 ** in place of RFC 2712 KerberosWrapper, as in:
2415 **
2416 ** Send ticket (copy to *p, set n = length)
2417 ** n = krb5_ap_req.length;
2418 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2419 ** if (krb5_ap_req.data)
2420 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2421 **
2422 ** Now using real RFC 2712 KerberosWrapper
2423 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2424 ** Note: 2712 "opaque" types are here replaced
2425 ** with a 2-byte length followed by the value.
2426 ** Example:
2427 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2428 ** Where "xx xx" = length bytes. Shown here with
2429 ** optional authenticator omitted.
2430 */
2431
2432 /* KerberosWrapper.Ticket */
2433 s2n(enc_ticket->length,p);
2434 memcpy(p, enc_ticket->data, enc_ticket->length);
2435 p+= enc_ticket->length;
2436 n = enc_ticket->length + 2;
2437
2438 /* KerberosWrapper.Authenticator */
2439 if (authp && authp->length)
2440 {
2441 s2n(authp->length,p);
2442 memcpy(p, authp->data, authp->length);
2443 p+= authp->length;
2444 n+= authp->length + 2;
2445
2446 free(authp->data);
2447 authp->data = NULL;
2448 authp->length = 0;
2449 }
2450 else
2451 {
2452 s2n(0,p);/* null authenticator length */
2453 n+=2;
2454 }
2455
2456 tmp_buf[0]=s->client_version>>8;
2457 tmp_buf[1]=s->client_version&0xff;
2458 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2459 goto err;
2460
2461 /* 20010420 VRS. Tried it this way; failed.
2462 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2463 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2464 ** kssl_ctx->length);
2465 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2466 */
2467
2468 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2469 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2470 kssl_ctx->key,iv);
2471 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2472 sizeof tmp_buf);
2473 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2474 outl += padl;
2475 if (outl > (int)sizeof epms)
2476 {
2477 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2478 goto err;
2479 }
2480 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2481
2482 /* KerberosWrapper.EncryptedPreMasterSecret */
2483 s2n(outl,p);
2484 memcpy(p, epms, outl);
2485 p+=outl;
2486 n+=outl + 2;
2487
2488 s->session->master_key_length=
2489 s->method->ssl3_enc->generate_master_secret(s,
2490 s->session->master_key,
2491 tmp_buf, sizeof tmp_buf);
2492
2493 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2494 OPENSSL_cleanse(epms, outl);
2495 }
2496 #endif
2497 #ifndef OPENSSL_NO_DH
2498 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2499 {
2500 DH *dh_srvr,*dh_clnt;
2501
2502 if (s->session->sess_cert == NULL)
2503 {
2504 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2505 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2506 goto err;
2507 }
2508
2509 if (s->session->sess_cert->peer_dh_tmp != NULL)
2510 dh_srvr=s->session->sess_cert->peer_dh_tmp;
2511 else
2512 {
2513 /* we get them from the cert */
2514 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2515 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
2516 goto err;
2517 }
2518
2519 /* generate a new random key */
2520 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2521 {
2522 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2523 goto err;
2524 }
2525 if (!DH_generate_key(dh_clnt))
2526 {
2527 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2528 DH_free(dh_clnt);
2529 goto err;
2530 }
2531
2532 /* use the 'p' output buffer for the DH key, but
2533 * make sure to clear it out afterwards */
2534
2535 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2536
2537 if (n <= 0)
2538 {
2539 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2540 DH_free(dh_clnt);
2541 goto err;
2542 }
2543
2544 /* generate master key from the result */
2545 s->session->master_key_length=
2546 s->method->ssl3_enc->generate_master_secret(s,
2547 s->session->master_key,p,n);
2548 /* clean up */
2549 memset(p,0,n);
2550
2551 /* send off the data */
2552 n=BN_num_bytes(dh_clnt->pub_key);
2553 s2n(n,p);
2554 BN_bn2bin(dh_clnt->pub_key,p);
2555 n+=2;
2556
2557 DH_free(dh_clnt);
2558
2559 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2560 }
2561 #endif
2562
2563 #ifndef OPENSSL_NO_ECDH
2564 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
2565 {
2566 const EC_GROUP *srvr_group = NULL;
2567 EC_KEY *tkey;
2568 int ecdh_clnt_cert = 0;
2569 int field_size = 0;
2570
2571 /* Did we send out the client's
2572 * ECDH share for use in premaster
2573 * computation as part of client certificate?
2574 * If so, set ecdh_clnt_cert to 1.
2575 */
2576 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2577 {
2578 /* XXX: For now, we do not support client
2579 * authentication using ECDH certificates.
2580 * To add such support, one needs to add
2581 * code that checks for appropriate
2582 * conditions and sets ecdh_clnt_cert to 1.
2583 * For example, the cert have an ECC
2584 * key on the same curve as the server's
2585 * and the key should be authorized for
2586 * key agreement.
2587 *
2588 * One also needs to add code in ssl3_connect
2589 * to skip sending the certificate verify
2590 * message.
2591 *
2592 * if ((s->cert->key->privatekey != NULL) &&
2593 * (s->cert->key->privatekey->type ==
2594 * EVP_PKEY_EC) && ...)
2595 * ecdh_clnt_cert = 1;
2596 */
2597 }
2598
2599 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2600 {
2601 tkey = s->session->sess_cert->peer_ecdh_tmp;
2602 }
2603 else
2604 {
2605 /* Get the Server Public Key from Cert */
2606 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2607 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2608 if ((srvr_pub_pkey == NULL) ||
2609 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2610 (srvr_pub_pkey->pkey.ec == NULL))
2611 {
2612 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2613 ERR_R_INTERNAL_ERROR);
2614 goto err;
2615 }
2616
2617 tkey = srvr_pub_pkey->pkey.ec;
2618 }
2619
2620 srvr_group = EC_KEY_get0_group(tkey);
2621 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2622
2623 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2624 {
2625 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2626 ERR_R_INTERNAL_ERROR);
2627 goto err;
2628 }
2629
2630 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2631 {
2632 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2633 goto err;
2634 }
2635
2636 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2637 {
2638 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2639 goto err;
2640 }
2641 if (ecdh_clnt_cert)
2642 {
2643 /* Reuse key info from our certificate
2644 * We only need our private key to perform
2645 * the ECDH computation.
2646 */
2647 const BIGNUM *priv_key;
2648 tkey = s->cert->key->privatekey->pkey.ec;
2649 priv_key = EC_KEY_get0_private_key(tkey);
2650 if (priv_key == NULL)
2651 {
2652 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2653 goto err;
2654 }
2655 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2656 {
2657 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2658 goto err;
2659 }
2660 }
2661 else
2662 {
2663 /* Generate a new ECDH key pair */
2664 if (!(EC_KEY_generate_key(clnt_ecdh)))
2665 {
2666 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2667 goto err;
2668 }
2669 }
2670
2671 /* use the 'p' output buffer for the ECDH key, but
2672 * make sure to clear it out afterwards
2673 */
2674
2675 field_size = EC_GROUP_get_degree(srvr_group);
2676 if (field_size <= 0)
2677 {
2678 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2679 ERR_R_ECDH_LIB);
2680 goto err;
2681 }
2682 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2683 if (n <= 0)
2684 {
2685 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2686 ERR_R_ECDH_LIB);
2687 goto err;
2688 }
2689
2690 /* generate master key from the result */
2691 s->session->master_key_length = s->method->ssl3_enc \
2692 -> generate_master_secret(s,
2693 s->session->master_key,
2694 p, n);
2695
2696 memset(p, 0, n); /* clean up */
2697
2698 if (ecdh_clnt_cert)
2699 {
2700 /* Send empty client key exch message */
2701 n = 0;
2702 }
2703 else
2704 {
2705 /* First check the size of encoding and
2706 * allocate memory accordingly.
2707 */
2708 encoded_pt_len =
2709 EC_POINT_point2oct(srvr_group,
2710 EC_KEY_get0_public_key(clnt_ecdh),
2711 POINT_CONVERSION_UNCOMPRESSED,
2712 NULL, 0, NULL);
2713
2714 encodedPoint = (unsigned char *)
2715 OPENSSL_malloc(encoded_pt_len *
2716 sizeof(unsigned char));
2717 bn_ctx = BN_CTX_new();
2718 if ((encodedPoint == NULL) ||
2719 (bn_ctx == NULL))
2720 {
2721 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2722 goto err;
2723 }
2724
2725 /* Encode the public key */
2726 n = EC_POINT_point2oct(srvr_group,
2727 EC_KEY_get0_public_key(clnt_ecdh),
2728 POINT_CONVERSION_UNCOMPRESSED,
2729 encodedPoint, encoded_pt_len, bn_ctx);
2730
2731 *p = n; /* length of encoded point */
2732 /* Encoded point will be copied here */
2733 p += 1;
2734 /* copy the point */
2735 memcpy((unsigned char *)p, encodedPoint, n);
2736 /* increment n to account for length field */
2737 n += 1;
2738 }
2739
2740 /* Free allocated memory */
2741 BN_CTX_free(bn_ctx);
2742 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2743 if (clnt_ecdh != NULL)
2744 EC_KEY_free(clnt_ecdh);
2745 EVP_PKEY_free(srvr_pub_pkey);
2746 }
2747 #endif /* !OPENSSL_NO_ECDH */
2748 else if (alg_k & SSL_kGOST)
2749 {
2750 /* GOST key exchange message creation */
2751 EVP_PKEY_CTX *pkey_ctx;
2752 X509 *peer_cert;
2753 size_t msglen;
2754 unsigned int md_len;
2755 int keytype;
2756 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2757 EVP_MD_CTX *ukm_hash;
2758 EVP_PKEY *pub_key;
2759
2760 /* Get server sertificate PKEY and create ctx from it */
2761 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2762 if (!peer_cert)
2763 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2764 if (!peer_cert) {
2765 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2766 goto err;
2767 }
2768
2769 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2770 /* If we have send a certificate, and certificate key
2771
2772 * parameters match those of server certificate, use
2773 * certificate key for key exchange
2774 */
2775
2776 /* Otherwise, generate ephemeral key pair */
2777
2778 EVP_PKEY_encrypt_init(pkey_ctx);
2779 /* Generate session key */
2780 RAND_bytes(premaster_secret,32);
2781 /* If we have client certificate, use its secret as peer key */
2782 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2783 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
2784 /* If there was an error - just ignore it. Ephemeral key
2785 * would be used
2786 */
2787 ERR_clear_error();
2788 }
2789 }
2790 /* Compute shared IV and store it in algorithm-specific
2791 * context data */
2792 ukm_hash = EVP_MD_CTX_create();
2793 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
2794 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
2795 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
2796 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2797 EVP_MD_CTX_destroy(ukm_hash);
2798 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
2799 8,shared_ukm)<0) {
2800 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2801 SSL_R_LIBRARY_BUG);
2802 goto err;
2803 }
2804 /* Make GOST keytransport blob message */
2805 /*Encapsulate it into sequence */
2806 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2807 msglen=255;
2808 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
2809 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2810 SSL_R_LIBRARY_BUG);
2811 goto err;
2812 }
2813 if (msglen >= 0x80)
2814 {
2815 *(p++)=0x81;
2816 *(p++)= msglen & 0xff;
2817 n=msglen+3;
2818 }
2819 else
2820 {
2821 *(p++)= msglen & 0xff;
2822 n=msglen+2;
2823 }
2824 memcpy(p, tmp, msglen);
2825 /* Check if pubkey from client certificate was used */
2826 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2827 {
2828 /* Set flag "skip certificate verify" */
2829 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2830 }
2831 EVP_PKEY_CTX_free(pkey_ctx);
2832 s->session->master_key_length=
2833 s->method->ssl3_enc->generate_master_secret(s,
2834 s->session->master_key,premaster_secret,32);
2835 EVP_PKEY_free(pub_key);
2836
2837 }
2838 #ifndef OPENSSL_NO_SRP
2839 else if (alg_k & SSL_kSRP)
2840 {
2841 if (s->srp_ctx.A != NULL)
2842 {
2843 /* send off the data */
2844 n=BN_num_bytes(s->srp_ctx.A);
2845 s2n(n,p);
2846 BN_bn2bin(s->srp_ctx.A,p);
2847 n+=2;
2848 }
2849 else
2850 {
2851 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2852 goto err;
2853 }
2854 if (s->session->srp_username != NULL)
2855 OPENSSL_free(s->session->srp_username);
2856 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2857 if (s->session->srp_username == NULL)
2858 {
2859 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2860 ERR_R_MALLOC_FAILURE);
2861 goto err;
2862 }
2863
2864 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
2865 {
2866 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2867 goto err;
2868 }
2869 }
2870 #endif
2871 #ifndef OPENSSL_NO_PSK
2872 else if (alg_k & SSL_kPSK)
2873 {
2874 char identity[PSK_MAX_IDENTITY_LEN];
2875 unsigned char *t = NULL;
2876 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
2877 unsigned int pre_ms_len = 0, psk_len = 0;
2878 int psk_err = 1;
2879
2880 n = 0;
2881 if (s->psk_client_callback == NULL)
2882 {
2883 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2884 SSL_R_PSK_NO_CLIENT_CB);
2885 goto err;
2886 }
2887
2888 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
2889 identity, PSK_MAX_IDENTITY_LEN,
2890 psk_or_pre_ms, sizeof(psk_or_pre_ms));
2891 if (psk_len > PSK_MAX_PSK_LEN)
2892 {
2893 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2894 ERR_R_INTERNAL_ERROR);
2895 goto psk_err;
2896 }
2897 else if (psk_len == 0)
2898 {
2899 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2900 SSL_R_PSK_IDENTITY_NOT_FOUND);
2901 goto psk_err;
2902 }
2903
2904 /* create PSK pre_master_secret */
2905 pre_ms_len = 2+psk_len+2+psk_len;
2906 t = psk_or_pre_ms;
2907 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
2908 s2n(psk_len, t);
2909 memset(t, 0, psk_len);
2910 t+=psk_len;
2911 s2n(psk_len, t);
2912
2913 if (s->session->psk_identity_hint != NULL)
2914 OPENSSL_free(s->session->psk_identity_hint);
2915 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
2916 if (s->ctx->psk_identity_hint != NULL &&
2917 s->session->psk_identity_hint == NULL)
2918 {
2919 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2920 ERR_R_MALLOC_FAILURE);
2921 goto psk_err;
2922 }
2923
2924 if (s->session->psk_identity != NULL)
2925 OPENSSL_free(s->session->psk_identity);
2926 s->session->psk_identity = BUF_strdup(identity);
2927 if (s->session->psk_identity == NULL)
2928 {
2929 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2930 ERR_R_MALLOC_FAILURE);
2931 goto psk_err;
2932 }
2933
2934 s->session->master_key_length =
2935 s->method->ssl3_enc->generate_master_secret(s,
2936 s->session->master_key,
2937 psk_or_pre_ms, pre_ms_len);
2938 n = strlen(identity);
2939 s2n(n, p);
2940 memcpy(p, identity, n);
2941 n+=2;
2942 psk_err = 0;
2943 psk_err:
2944 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
2945 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
2946 if (psk_err != 0)
2947 {
2948 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2949 goto err;
2950 }
2951 }
2952 #endif
2953 else
2954 {
2955 ssl3_send_alert(s, SSL3_AL_FATAL,
2956 SSL_AD_HANDSHAKE_FAILURE);
2957 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2958 ERR_R_INTERNAL_ERROR);
2959 goto err;
2960 }
2961
2962 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
2963 l2n3(n,d);
2964
2965 s->state=SSL3_ST_CW_KEY_EXCH_B;
2966 /* number of bytes to write */
2967 s->init_num=n+4;
2968 s->init_off=0;
2969 }
2970
2971 /* SSL3_ST_CW_KEY_EXCH_B */
2972 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2973 err:
2974 #ifndef OPENSSL_NO_ECDH
2975 BN_CTX_free(bn_ctx);
2976 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2977 if (clnt_ecdh != NULL)
2978 EC_KEY_free(clnt_ecdh);
2979 EVP_PKEY_free(srvr_pub_pkey);
2980 #endif
2981 return(-1);
2982 }
2983
ssl3_send_client_verify(SSL * s)2984 int ssl3_send_client_verify(SSL *s)
2985 {
2986 unsigned char *p,*d;
2987 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
2988 EVP_PKEY *pkey;
2989 EVP_PKEY_CTX *pctx=NULL;
2990 EVP_MD_CTX mctx;
2991 unsigned u=0;
2992 unsigned long n;
2993 int j;
2994
2995 EVP_MD_CTX_init(&mctx);
2996
2997 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
2998 {
2999 d=(unsigned char *)s->init_buf->data;
3000 p= &(d[4]);
3001 pkey=s->cert->key->privatekey;
3002 /* Create context from key and test if sha1 is allowed as digest */
3003 pctx = EVP_PKEY_CTX_new(pkey,NULL);
3004 EVP_PKEY_sign_init(pctx);
3005 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
3006 {
3007 if (TLS1_get_version(s) < TLS1_2_VERSION)
3008 s->method->ssl3_enc->cert_verify_mac(s,
3009 NID_sha1,
3010 &(data[MD5_DIGEST_LENGTH]));
3011 }
3012 else
3013 {
3014 ERR_clear_error();
3015 }
3016 /* For TLS v1.2 send signature algorithm and signature
3017 * using agreed digest and cached handshake records.
3018 */
3019 if (TLS1_get_version(s) >= TLS1_2_VERSION)
3020 {
3021 long hdatalen = 0;
3022 void *hdata;
3023 const EVP_MD *md = s->cert->key->digest;
3024 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
3025 &hdata);
3026 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
3027 {
3028 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3029 ERR_R_INTERNAL_ERROR);
3030 goto err;
3031 }
3032 p += 2;
3033 #ifdef SSL_DEBUG
3034 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
3035 EVP_MD_name(md));
3036 #endif
3037 if (!EVP_SignInit_ex(&mctx, md, NULL)
3038 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3039 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
3040 {
3041 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3042 ERR_R_EVP_LIB);
3043 goto err;
3044 }
3045 s2n(u,p);
3046 n = u + 4;
3047 if (!ssl3_digest_cached_records(s))
3048 goto err;
3049 }
3050 else
3051 #ifndef OPENSSL_NO_RSA
3052 if (pkey->type == EVP_PKEY_RSA)
3053 {
3054 s->method->ssl3_enc->cert_verify_mac(s,
3055 NID_md5,
3056 &(data[0]));
3057 if (RSA_sign(NID_md5_sha1, data,
3058 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3059 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3060 {
3061 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3062 goto err;
3063 }
3064 s2n(u,p);
3065 n=u+2;
3066 }
3067 else
3068 #endif
3069 #ifndef OPENSSL_NO_DSA
3070 if (pkey->type == EVP_PKEY_DSA)
3071 {
3072 if (!DSA_sign(pkey->save_type,
3073 &(data[MD5_DIGEST_LENGTH]),
3074 SHA_DIGEST_LENGTH,&(p[2]),
3075 (unsigned int *)&j,pkey->pkey.dsa))
3076 {
3077 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3078 goto err;
3079 }
3080 s2n(j,p);
3081 n=j+2;
3082 }
3083 else
3084 #endif
3085 #ifndef OPENSSL_NO_ECDSA
3086 if (pkey->type == EVP_PKEY_EC)
3087 {
3088 if (!ECDSA_sign(pkey->save_type,
3089 &(data[MD5_DIGEST_LENGTH]),
3090 SHA_DIGEST_LENGTH,&(p[2]),
3091 (unsigned int *)&j,pkey->pkey.ec))
3092 {
3093 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3094 ERR_R_ECDSA_LIB);
3095 goto err;
3096 }
3097 s2n(j,p);
3098 n=j+2;
3099 }
3100 else
3101 #endif
3102 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3103 {
3104 unsigned char signbuf[64];
3105 int i;
3106 size_t sigsize=64;
3107 s->method->ssl3_enc->cert_verify_mac(s,
3108 NID_id_GostR3411_94,
3109 data);
3110 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3111 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3112 ERR_R_INTERNAL_ERROR);
3113 goto err;
3114 }
3115 for (i=63,j=0; i>=0; j++, i--) {
3116 p[2+j]=signbuf[i];
3117 }
3118 s2n(j,p);
3119 n=j+2;
3120 }
3121 else
3122 {
3123 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3124 goto err;
3125 }
3126 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
3127 l2n3(n,d);
3128
3129 s->state=SSL3_ST_CW_CERT_VRFY_B;
3130 s->init_num=(int)n+4;
3131 s->init_off=0;
3132 }
3133 EVP_MD_CTX_cleanup(&mctx);
3134 EVP_PKEY_CTX_free(pctx);
3135 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3136 err:
3137 EVP_MD_CTX_cleanup(&mctx);
3138 EVP_PKEY_CTX_free(pctx);
3139 return(-1);
3140 }
3141
ssl3_send_client_certificate(SSL * s)3142 int ssl3_send_client_certificate(SSL *s)
3143 {
3144 X509 *x509=NULL;
3145 EVP_PKEY *pkey=NULL;
3146 int i;
3147 unsigned long l;
3148
3149 if (s->state == SSL3_ST_CW_CERT_A)
3150 {
3151 if ((s->cert == NULL) ||
3152 (s->cert->key->x509 == NULL) ||
3153 (s->cert->key->privatekey == NULL))
3154 s->state=SSL3_ST_CW_CERT_B;
3155 else
3156 s->state=SSL3_ST_CW_CERT_C;
3157 }
3158
3159 /* We need to get a client cert */
3160 if (s->state == SSL3_ST_CW_CERT_B)
3161 {
3162 /* If we get an error, we need to
3163 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3164 * We then get retied later */
3165 i=0;
3166 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3167 if (i < 0)
3168 {
3169 s->rwstate=SSL_X509_LOOKUP;
3170 return(-1);
3171 }
3172 s->rwstate=SSL_NOTHING;
3173 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3174 {
3175 s->state=SSL3_ST_CW_CERT_B;
3176 if ( !SSL_use_certificate(s,x509) ||
3177 !SSL_use_PrivateKey(s,pkey))
3178 i=0;
3179 }
3180 else if (i == 1)
3181 {
3182 i=0;
3183 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3184 }
3185
3186 if (x509 != NULL) X509_free(x509);
3187 if (pkey != NULL) EVP_PKEY_free(pkey);
3188 if (i == 0)
3189 {
3190 if (s->version == SSL3_VERSION)
3191 {
3192 s->s3->tmp.cert_req=0;
3193 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3194 return(1);
3195 }
3196 else
3197 {
3198 s->s3->tmp.cert_req=2;
3199 }
3200 }
3201
3202 /* Ok, we have a cert */
3203 s->state=SSL3_ST_CW_CERT_C;
3204 }
3205
3206 if (s->state == SSL3_ST_CW_CERT_C)
3207 {
3208 s->state=SSL3_ST_CW_CERT_D;
3209 l=ssl3_output_cert_chain(s,
3210 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
3211 s->init_num=(int)l;
3212 s->init_off=0;
3213 }
3214 /* SSL3_ST_CW_CERT_D */
3215 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3216 }
3217
3218 #define has_bits(i,m) (((i)&(m)) == (m))
3219
ssl3_check_cert_and_algorithm(SSL * s)3220 int ssl3_check_cert_and_algorithm(SSL *s)
3221 {
3222 int i,idx;
3223 long alg_k,alg_a;
3224 EVP_PKEY *pkey=NULL;
3225 SESS_CERT *sc;
3226 #ifndef OPENSSL_NO_RSA
3227 RSA *rsa;
3228 #endif
3229 #ifndef OPENSSL_NO_DH
3230 DH *dh;
3231 #endif
3232
3233 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3234 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3235
3236 /* we don't have a certificate */
3237 if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3238 return(1);
3239
3240 sc=s->session->sess_cert;
3241 if (sc == NULL)
3242 {
3243 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3244 goto err;
3245 }
3246
3247 #ifndef OPENSSL_NO_RSA
3248 rsa=s->session->sess_cert->peer_rsa_tmp;
3249 #endif
3250 #ifndef OPENSSL_NO_DH
3251 dh=s->session->sess_cert->peer_dh_tmp;
3252 #endif
3253
3254 /* This is the passed certificate */
3255
3256 idx=sc->peer_cert_type;
3257 #ifndef OPENSSL_NO_ECDH
3258 if (idx == SSL_PKEY_ECC)
3259 {
3260 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3261 s) == 0)
3262 { /* check failed */
3263 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3264 goto f_err;
3265 }
3266 else
3267 {
3268 return 1;
3269 }
3270 }
3271 #endif
3272 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3273 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3274 EVP_PKEY_free(pkey);
3275
3276
3277 /* Check that we have a certificate if we require one */
3278 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3279 {
3280 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3281 goto f_err;
3282 }
3283 #ifndef OPENSSL_NO_DSA
3284 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3285 {
3286 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3287 goto f_err;
3288 }
3289 #endif
3290 #ifndef OPENSSL_NO_RSA
3291 if ((alg_k & SSL_kRSA) &&
3292 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3293 {
3294 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3295 goto f_err;
3296 }
3297 #endif
3298 #ifndef OPENSSL_NO_DH
3299 if ((alg_k & SSL_kEDH) &&
3300 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3301 {
3302 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3303 goto f_err;
3304 }
3305 else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3306 {
3307 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3308 goto f_err;
3309 }
3310 #ifndef OPENSSL_NO_DSA
3311 else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3312 {
3313 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3314 goto f_err;
3315 }
3316 #endif
3317 #endif
3318
3319 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3320 {
3321 #ifndef OPENSSL_NO_RSA
3322 if (alg_k & SSL_kRSA)
3323 {
3324 if (rsa == NULL
3325 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3326 {
3327 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3328 goto f_err;
3329 }
3330 }
3331 else
3332 #endif
3333 #ifndef OPENSSL_NO_DH
3334 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
3335 {
3336 if (dh == NULL
3337 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3338 {
3339 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3340 goto f_err;
3341 }
3342 }
3343 else
3344 #endif
3345 {
3346 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3347 goto f_err;
3348 }
3349 }
3350 return(1);
3351 f_err:
3352 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3353 err:
3354 return(0);
3355 }
3356
3357 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
ssl3_send_next_proto(SSL * s)3358 int ssl3_send_next_proto(SSL *s)
3359 {
3360 unsigned int len, padding_len;
3361 unsigned char *d;
3362
3363 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3364 {
3365 len = s->next_proto_negotiated_len;
3366 padding_len = 32 - ((len + 2) % 32);
3367 d = (unsigned char *)s->init_buf->data;
3368 d[4] = len;
3369 memcpy(d + 5, s->next_proto_negotiated, len);
3370 d[5 + len] = padding_len;
3371 memset(d + 6 + len, 0, padding_len);
3372 *(d++)=SSL3_MT_NEXT_PROTO;
3373 l2n3(2 + len + padding_len, d);
3374 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3375 s->init_num = 4 + 2 + len + padding_len;
3376 s->init_off = 0;
3377 }
3378
3379 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3380 }
3381 #endif /* !OPENSSL_NO_TLSEXT && !OPENSSL_NO_NEXTPROTONEG */
3382
3383 /* Check to see if handshake is full or resumed. Usually this is just a
3384 * case of checking to see if a cache hit has occurred. In the case of
3385 * session tickets we have to check the next message to be sure.
3386 */
3387
3388 #ifndef OPENSSL_NO_TLSEXT
ssl3_check_finished(SSL * s)3389 int ssl3_check_finished(SSL *s)
3390 {
3391 int ok;
3392 long n;
3393 /* If we have no ticket it cannot be a resumed session. */
3394 if (!s->session->tlsext_tick)
3395 return 1;
3396 /* this function is called when we really expect a Certificate
3397 * message, so permit appropriate message length */
3398 n=s->method->ssl_get_message(s,
3399 SSL3_ST_CR_CERT_A,
3400 SSL3_ST_CR_CERT_B,
3401 -1,
3402 s->max_cert_list,
3403 &ok);
3404 if (!ok) return((int)n);
3405 s->s3->tmp.reuse_message = 1;
3406 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3407 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3408 return 2;
3409
3410 return 1;
3411 }
3412 #endif
3413
ssl_do_client_cert_cb(SSL * s,X509 ** px509,EVP_PKEY ** ppkey)3414 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3415 {
3416 int i = 0;
3417 #ifndef OPENSSL_NO_ENGINE
3418 if (s->ctx->client_cert_engine)
3419 {
3420 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3421 SSL_get_client_CA_list(s),
3422 px509, ppkey, NULL, NULL, NULL);
3423 if (i != 0)
3424 return i;
3425 }
3426 #endif
3427 if (s->ctx->client_cert_cb)
3428 i = s->ctx->client_cert_cb(s,px509,ppkey);
3429 return i;
3430 }
3431