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-rw-r--r--src/lib/libssl/s3_clnt.c3372
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diff --git a/src/lib/libssl/s3_clnt.c b/src/lib/libssl/s3_clnt.c
deleted file mode 100644
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--- a/src/lib/libssl/s3_clnt.c
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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
170static const SSL_METHOD *ssl3_get_client_method(int ver);
171static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
172
173static 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
181IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
182 ssl_undefined_function,
183 ssl3_connect,
184 ssl3_get_client_method)
185
186int ssl3_connect(SSL *s)
187 {
188 BUF_MEM *buf=NULL;
189 unsigned long Time=(unsigned long)time(NULL);
190 void (*cb)(const SSL *ssl,int type,int val)=NULL;
191 int ret= -1;
192 int new_state,state,skip=0;
193
194 RAND_add(&Time,sizeof(Time),0);
195 ERR_clear_error();
196 clear_sys_error();
197
198 if (s->info_callback != NULL)
199 cb=s->info_callback;
200 else if (s->ctx->info_callback != NULL)
201 cb=s->ctx->info_callback;
202
203 s->in_handshake++;
204 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
205
206#ifndef OPENSSL_NO_HEARTBEATS
207 /* If we're awaiting a HeartbeatResponse, pretend we
208 * already got and don't await it anymore, because
209 * Heartbeats don't make sense during handshakes anyway.
210 */
211 if (s->tlsext_hb_pending)
212 {
213 s->tlsext_hb_pending = 0;
214 s->tlsext_hb_seq++;
215 }
216#endif
217
218 for (;;)
219 {
220 state=s->state;
221
222 switch(s->state)
223 {
224 case SSL_ST_RENEGOTIATE:
225 s->renegotiate=1;
226 s->state=SSL_ST_CONNECT;
227 s->ctx->stats.sess_connect_renegotiate++;
228 /* break */
229 case SSL_ST_BEFORE:
230 case SSL_ST_CONNECT:
231 case SSL_ST_BEFORE|SSL_ST_CONNECT:
232 case SSL_ST_OK|SSL_ST_CONNECT:
233
234 s->server=0;
235 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
236
237 if ((s->version & 0xff00 ) != 0x0300)
238 {
239 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
240 ret = -1;
241 goto end;
242 }
243
244 /* s->version=SSL3_VERSION; */
245 s->type=SSL_ST_CONNECT;
246
247 if (s->init_buf == NULL)
248 {
249 if ((buf=BUF_MEM_new()) == NULL)
250 {
251 ret= -1;
252 goto end;
253 }
254 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
255 {
256 ret= -1;
257 goto end;
258 }
259 s->init_buf=buf;
260 buf=NULL;
261 }
262
263 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
264
265 /* setup buffing BIO */
266 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
267
268 /* don't push the buffering BIO quite yet */
269
270 ssl3_init_finished_mac(s);
271
272 s->state=SSL3_ST_CW_CLNT_HELLO_A;
273 s->ctx->stats.sess_connect++;
274 s->init_num=0;
275 break;
276
277 case SSL3_ST_CW_CLNT_HELLO_A:
278 case SSL3_ST_CW_CLNT_HELLO_B:
279
280 s->shutdown=0;
281 ret=ssl3_client_hello(s);
282 if (ret <= 0) goto end;
283 s->state=SSL3_ST_CR_SRVR_HELLO_A;
284 s->init_num=0;
285
286 /* turn on buffering for the next lot of output */
287 if (s->bbio != s->wbio)
288 s->wbio=BIO_push(s->bbio,s->wbio);
289
290 break;
291
292 case SSL3_ST_CR_SRVR_HELLO_A:
293 case SSL3_ST_CR_SRVR_HELLO_B:
294 ret=ssl3_get_server_hello(s);
295 if (ret <= 0) goto end;
296
297 if (s->hit)
298 {
299 s->state=SSL3_ST_CR_FINISHED_A;
300#ifndef OPENSSL_NO_TLSEXT
301 if (s->tlsext_ticket_expected)
302 {
303 /* receive renewed session ticket */
304 s->state=SSL3_ST_CR_SESSION_TICKET_A;
305 }
306#endif
307 }
308 else
309 s->state=SSL3_ST_CR_CERT_A;
310 s->init_num=0;
311 break;
312
313 case SSL3_ST_CR_CERT_A:
314 case SSL3_ST_CR_CERT_B:
315#ifndef OPENSSL_NO_TLSEXT
316 ret=ssl3_check_finished(s);
317 if (ret <= 0) goto end;
318 if (ret == 2)
319 {
320 s->hit = 1;
321 if (s->tlsext_ticket_expected)
322 s->state=SSL3_ST_CR_SESSION_TICKET_A;
323 else
324 s->state=SSL3_ST_CR_FINISHED_A;
325 s->init_num=0;
326 break;
327 }
328#endif
329 /* Check if it is anon DH/ECDH */
330 /* or PSK */
331 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
332 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
333 {
334 ret=ssl3_get_server_certificate(s);
335 if (ret <= 0) goto end;
336#ifndef OPENSSL_NO_TLSEXT
337 if (s->tlsext_status_expected)
338 s->state=SSL3_ST_CR_CERT_STATUS_A;
339 else
340 s->state=SSL3_ST_CR_KEY_EXCH_A;
341 }
342 else
343 {
344 skip = 1;
345 s->state=SSL3_ST_CR_KEY_EXCH_A;
346 }
347#else
348 }
349 else
350 skip=1;
351
352 s->state=SSL3_ST_CR_KEY_EXCH_A;
353#endif
354 s->init_num=0;
355 break;
356
357 case SSL3_ST_CR_KEY_EXCH_A:
358 case SSL3_ST_CR_KEY_EXCH_B:
359 ret=ssl3_get_key_exchange(s);
360 if (ret <= 0) goto end;
361 s->state=SSL3_ST_CR_CERT_REQ_A;
362 s->init_num=0;
363
364 /* at this point we check that we have the
365 * required stuff from the server */
366 if (!ssl3_check_cert_and_algorithm(s))
367 {
368 ret= -1;
369 goto end;
370 }
371 break;
372
373 case SSL3_ST_CR_CERT_REQ_A:
374 case SSL3_ST_CR_CERT_REQ_B:
375 ret=ssl3_get_certificate_request(s);
376 if (ret <= 0) goto end;
377 s->state=SSL3_ST_CR_SRVR_DONE_A;
378 s->init_num=0;
379 break;
380
381 case SSL3_ST_CR_SRVR_DONE_A:
382 case SSL3_ST_CR_SRVR_DONE_B:
383 ret=ssl3_get_server_done(s);
384 if (ret <= 0) goto end;
385#ifndef OPENSSL_NO_SRP
386 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP)
387 {
388 if ((ret = SRP_Calc_A_param(s))<=0)
389 {
390 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
391 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
392 goto end;
393 }
394 }
395#endif
396 if (s->s3->tmp.cert_req)
397 s->state=SSL3_ST_CW_CERT_A;
398 else
399 s->state=SSL3_ST_CW_KEY_EXCH_A;
400 s->init_num=0;
401
402 break;
403
404 case SSL3_ST_CW_CERT_A:
405 case SSL3_ST_CW_CERT_B:
406 case SSL3_ST_CW_CERT_C:
407 case SSL3_ST_CW_CERT_D:
408 ret=ssl3_send_client_certificate(s);
409 if (ret <= 0) goto end;
410 s->state=SSL3_ST_CW_KEY_EXCH_A;
411 s->init_num=0;
412 break;
413
414 case SSL3_ST_CW_KEY_EXCH_A:
415 case SSL3_ST_CW_KEY_EXCH_B:
416 ret=ssl3_send_client_key_exchange(s);
417 if (ret <= 0) goto end;
418 /* EAY EAY EAY need to check for DH fix cert
419 * sent back */
420 /* For TLS, cert_req is set to 2, so a cert chain
421 * of nothing is sent, but no verify packet is sent */
422 /* XXX: For now, we do not support client
423 * authentication in ECDH cipher suites with
424 * ECDH (rather than ECDSA) certificates.
425 * We need to skip the certificate verify
426 * message when client's ECDH public key is sent
427 * inside the client certificate.
428 */
429 if (s->s3->tmp.cert_req == 1)
430 {
431 s->state=SSL3_ST_CW_CERT_VRFY_A;
432 }
433 else
434 {
435 s->state=SSL3_ST_CW_CHANGE_A;
436 s->s3->change_cipher_spec=0;
437 }
438 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
439 {
440 s->state=SSL3_ST_CW_CHANGE_A;
441 s->s3->change_cipher_spec=0;
442 }
443
444 s->init_num=0;
445 break;
446
447 case SSL3_ST_CW_CERT_VRFY_A:
448 case SSL3_ST_CW_CERT_VRFY_B:
449 ret=ssl3_send_client_verify(s);
450 if (ret <= 0) goto end;
451 s->state=SSL3_ST_CW_CHANGE_A;
452 s->init_num=0;
453 s->s3->change_cipher_spec=0;
454 break;
455
456 case SSL3_ST_CW_CHANGE_A:
457 case SSL3_ST_CW_CHANGE_B:
458 ret=ssl3_send_change_cipher_spec(s,
459 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
460 if (ret <= 0) goto end;
461
462#if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
463 s->state=SSL3_ST_CW_FINISHED_A;
464#else
465 if (s->s3->next_proto_neg_seen)
466 s->state=SSL3_ST_CW_NEXT_PROTO_A;
467 else
468 s->state=SSL3_ST_CW_FINISHED_A;
469#endif
470 s->init_num=0;
471
472 s->session->cipher=s->s3->tmp.new_cipher;
473#ifdef OPENSSL_NO_COMP
474 s->session->compress_meth=0;
475#else
476 if (s->s3->tmp.new_compression == NULL)
477 s->session->compress_meth=0;
478 else
479 s->session->compress_meth=
480 s->s3->tmp.new_compression->id;
481#endif
482 if (!s->method->ssl3_enc->setup_key_block(s))
483 {
484 ret= -1;
485 goto end;
486 }
487
488 if (!s->method->ssl3_enc->change_cipher_state(s,
489 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
490 {
491 ret= -1;
492 goto end;
493 }
494
495 break;
496
497#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
498 case SSL3_ST_CW_NEXT_PROTO_A:
499 case SSL3_ST_CW_NEXT_PROTO_B:
500 ret=ssl3_send_next_proto(s);
501 if (ret <= 0) goto end;
502 s->state=SSL3_ST_CW_FINISHED_A;
503 break;
504#endif
505
506 case SSL3_ST_CW_FINISHED_A:
507 case SSL3_ST_CW_FINISHED_B:
508 ret=ssl3_send_finished(s,
509 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
510 s->method->ssl3_enc->client_finished_label,
511 s->method->ssl3_enc->client_finished_label_len);
512 if (ret <= 0) goto end;
513 s->state=SSL3_ST_CW_FLUSH;
514
515 /* clear flags */
516 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
517 if (s->hit)
518 {
519 s->s3->tmp.next_state=SSL_ST_OK;
520 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
521 {
522 s->state=SSL_ST_OK;
523 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
524 s->s3->delay_buf_pop_ret=0;
525 }
526 }
527 else
528 {
529#ifndef OPENSSL_NO_TLSEXT
530 /* Allow NewSessionTicket if ticket expected */
531 if (s->tlsext_ticket_expected)
532 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
533 else
534#endif
535
536 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
537 }
538 s->init_num=0;
539 break;
540
541#ifndef OPENSSL_NO_TLSEXT
542 case SSL3_ST_CR_SESSION_TICKET_A:
543 case SSL3_ST_CR_SESSION_TICKET_B:
544 ret=ssl3_get_new_session_ticket(s);
545 if (ret <= 0) goto end;
546 s->state=SSL3_ST_CR_FINISHED_A;
547 s->init_num=0;
548 break;
549
550 case SSL3_ST_CR_CERT_STATUS_A:
551 case SSL3_ST_CR_CERT_STATUS_B:
552 ret=ssl3_get_cert_status(s);
553 if (ret <= 0) goto end;
554 s->state=SSL3_ST_CR_KEY_EXCH_A;
555 s->init_num=0;
556 break;
557#endif
558
559 case SSL3_ST_CR_FINISHED_A:
560 case SSL3_ST_CR_FINISHED_B:
561
562 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
563 SSL3_ST_CR_FINISHED_B);
564 if (ret <= 0) goto end;
565
566 if (s->hit)
567 s->state=SSL3_ST_CW_CHANGE_A;
568 else
569 s->state=SSL_ST_OK;
570 s->init_num=0;
571 break;
572
573 case SSL3_ST_CW_FLUSH:
574 s->rwstate=SSL_WRITING;
575 if (BIO_flush(s->wbio) <= 0)
576 {
577 ret= -1;
578 goto end;
579 }
580 s->rwstate=SSL_NOTHING;
581 s->state=s->s3->tmp.next_state;
582 break;
583
584 case SSL_ST_OK:
585 /* clean a few things up */
586 ssl3_cleanup_key_block(s);
587
588 if (s->init_buf != NULL)
589 {
590 BUF_MEM_free(s->init_buf);
591 s->init_buf=NULL;
592 }
593
594 /* If we are not 'joining' the last two packets,
595 * remove the buffering now */
596 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
597 ssl_free_wbio_buffer(s);
598 /* else do it later in ssl3_write */
599
600 s->init_num=0;
601 s->renegotiate=0;
602 s->new_session=0;
603
604 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
605 if (s->hit) s->ctx->stats.sess_hit++;
606
607 ret=1;
608 /* s->server=0; */
609 s->handshake_func=ssl3_connect;
610 s->ctx->stats.sess_connect_good++;
611
612 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
613
614 goto end;
615 /* break; */
616
617 default:
618 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
619 ret= -1;
620 goto end;
621 /* break; */
622 }
623
624 /* did we do anything */
625 if (!s->s3->tmp.reuse_message && !skip)
626 {
627 if (s->debug)
628 {
629 if ((ret=BIO_flush(s->wbio)) <= 0)
630 goto end;
631 }
632
633 if ((cb != NULL) && (s->state != state))
634 {
635 new_state=s->state;
636 s->state=state;
637 cb(s,SSL_CB_CONNECT_LOOP,1);
638 s->state=new_state;
639 }
640 }
641 skip=0;
642 }
643end:
644 s->in_handshake--;
645 if (buf != NULL)
646 BUF_MEM_free(buf);
647 if (cb != NULL)
648 cb(s,SSL_CB_CONNECT_EXIT,ret);
649 return(ret);
650 }
651
652
653int ssl3_client_hello(SSL *s)
654 {
655 unsigned char *buf;
656 unsigned char *p,*d;
657 int i;
658 unsigned long l;
659#ifndef OPENSSL_NO_COMP
660 int j;
661 SSL_COMP *comp;
662#endif
663
664 buf=(unsigned char *)s->init_buf->data;
665 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
666 {
667 SSL_SESSION *sess = s->session;
668 if ((sess == NULL) ||
669 (sess->ssl_version != s->version) ||
670#ifdef OPENSSL_NO_TLSEXT
671 !sess->session_id_length ||
672#else
673 (!sess->session_id_length && !sess->tlsext_tick) ||
674#endif
675 (sess->not_resumable))
676 {
677 if (!ssl_get_new_session(s,0))
678 goto err;
679 }
680 /* else use the pre-loaded session */
681
682 p=s->s3->client_random;
683
684 if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0)
685 goto err;
686
687 /* Do the message type and length last */
688 d=p= &(buf[4]);
689
690 /* version indicates the negotiated version: for example from
691 * an SSLv2/v3 compatible client hello). The client_version
692 * field is the maximum version we permit and it is also
693 * used in RSA encrypted premaster secrets. Some servers can
694 * choke if we initially report a higher version then
695 * renegotiate to a lower one in the premaster secret. This
696 * didn't happen with TLS 1.0 as most servers supported it
697 * but it can with TLS 1.1 or later if the server only supports
698 * 1.0.
699 *
700 * Possible scenario with previous logic:
701 * 1. Client hello indicates TLS 1.2
702 * 2. Server hello says TLS 1.0
703 * 3. RSA encrypted premaster secret uses 1.2.
704 * 4. Handhaked proceeds using TLS 1.0.
705 * 5. Server sends hello request to renegotiate.
706 * 6. Client hello indicates TLS v1.0 as we now
707 * know that is maximum server supports.
708 * 7. Server chokes on RSA encrypted premaster secret
709 * containing version 1.0.
710 *
711 * For interoperability it should be OK to always use the
712 * maximum version we support in client hello and then rely
713 * on the checking of version to ensure the servers isn't
714 * being inconsistent: for example initially negotiating with
715 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
716 * client_version in client hello and not resetting it to
717 * the negotiated version.
718 */
719#if 0
720 *(p++)=s->version>>8;
721 *(p++)=s->version&0xff;
722 s->client_version=s->version;
723#else
724 *(p++)=s->client_version>>8;
725 *(p++)=s->client_version&0xff;
726#endif
727
728 /* Random stuff */
729 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
730 p+=SSL3_RANDOM_SIZE;
731
732 /* Session ID */
733 if (s->new_session)
734 i=0;
735 else
736 i=s->session->session_id_length;
737 *(p++)=i;
738 if (i != 0)
739 {
740 if (i > (int)sizeof(s->session->session_id))
741 {
742 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
743 goto err;
744 }
745 memcpy(p,s->session->session_id,i);
746 p+=i;
747 }
748
749 /* Ciphers supported */
750 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
751 if (i == 0)
752 {
753 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
754 goto err;
755 }
756#ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
757 /* Some servers hang if client hello > 256 bytes
758 * as hack workaround chop number of supported ciphers
759 * to keep it well below this if we use TLS v1.2
760 */
761 if (TLS1_get_version(s) >= TLS1_2_VERSION
762 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
763 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
764#endif
765 s2n(i,p);
766 p+=i;
767
768 /* COMPRESSION */
769#ifdef OPENSSL_NO_COMP
770 *(p++)=1;
771#else
772
773 if ((s->options & SSL_OP_NO_COMPRESSION)
774 || !s->ctx->comp_methods)
775 j=0;
776 else
777 j=sk_SSL_COMP_num(s->ctx->comp_methods);
778 *(p++)=1+j;
779 for (i=0; i<j; i++)
780 {
781 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
782 *(p++)=comp->id;
783 }
784#endif
785 *(p++)=0; /* Add the NULL method */
786
787#ifndef OPENSSL_NO_TLSEXT
788 /* TLS extensions*/
789 if (ssl_prepare_clienthello_tlsext(s) <= 0)
790 {
791 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
792 goto err;
793 }
794 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
795 {
796 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
797 goto err;
798 }
799#endif
800
801 l=(p-d);
802 d=buf;
803 *(d++)=SSL3_MT_CLIENT_HELLO;
804 l2n3(l,d);
805
806 s->state=SSL3_ST_CW_CLNT_HELLO_B;
807 /* number of bytes to write */
808 s->init_num=p-buf;
809 s->init_off=0;
810 }
811
812 /* SSL3_ST_CW_CLNT_HELLO_B */
813 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
814err:
815 return(-1);
816 }
817
818int ssl3_get_server_hello(SSL *s)
819 {
820 STACK_OF(SSL_CIPHER) *sk;
821 const SSL_CIPHER *c;
822 unsigned char *p,*d;
823 int i,al,ok;
824 unsigned int j;
825 long n;
826#ifndef OPENSSL_NO_COMP
827 SSL_COMP *comp;
828#endif
829
830 n=s->method->ssl_get_message(s,
831 SSL3_ST_CR_SRVR_HELLO_A,
832 SSL3_ST_CR_SRVR_HELLO_B,
833 -1,
834 20000, /* ?? */
835 &ok);
836
837 if (!ok) return((int)n);
838
839 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
840 {
841 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
842 {
843 if ( s->d1->send_cookie == 0)
844 {
845 s->s3->tmp.reuse_message = 1;
846 return 1;
847 }
848 else /* already sent a cookie */
849 {
850 al=SSL_AD_UNEXPECTED_MESSAGE;
851 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
852 goto f_err;
853 }
854 }
855 }
856
857 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
858 {
859 al=SSL_AD_UNEXPECTED_MESSAGE;
860 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
861 goto f_err;
862 }
863
864 d=p=(unsigned char *)s->init_msg;
865
866 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
867 {
868 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
869 s->version=(s->version&0xff00)|p[1];
870 al=SSL_AD_PROTOCOL_VERSION;
871 goto f_err;
872 }
873 p+=2;
874
875 /* load the server hello data */
876 /* load the server random */
877 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
878 p+=SSL3_RANDOM_SIZE;
879
880 /* get the session-id */
881 j= *(p++);
882
883 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
884 {
885 al=SSL_AD_ILLEGAL_PARAMETER;
886 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
887 goto f_err;
888 }
889
890#ifndef OPENSSL_NO_TLSEXT
891 /* check if we want to resume the session based on external pre-shared secret */
892 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
893 {
894 SSL_CIPHER *pref_cipher=NULL;
895 s->session->master_key_length=sizeof(s->session->master_key);
896 if (s->tls_session_secret_cb(s, s->session->master_key,
897 &s->session->master_key_length,
898 NULL, &pref_cipher,
899 s->tls_session_secret_cb_arg))
900 {
901 s->session->cipher = pref_cipher ?
902 pref_cipher : ssl_get_cipher_by_char(s, p+j);
903 }
904 }
905#endif /* OPENSSL_NO_TLSEXT */
906
907 if (j != 0 && j == s->session->session_id_length
908 && memcmp(p,s->session->session_id,j) == 0)
909 {
910 if(s->sid_ctx_length != s->session->sid_ctx_length
911 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
912 {
913 /* actually a client application bug */
914 al=SSL_AD_ILLEGAL_PARAMETER;
915 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
916 goto f_err;
917 }
918 s->hit=1;
919 }
920 else /* a miss or crap from the other end */
921 {
922 /* If we were trying for session-id reuse, make a new
923 * SSL_SESSION so we don't stuff up other people */
924 s->hit=0;
925 if (s->session->session_id_length > 0)
926 {
927 if (!ssl_get_new_session(s,0))
928 {
929 al=SSL_AD_INTERNAL_ERROR;
930 goto f_err;
931 }
932 }
933 s->session->session_id_length=j;
934 memcpy(s->session->session_id,p,j); /* j could be 0 */
935 }
936 p+=j;
937 c=ssl_get_cipher_by_char(s,p);
938 if (c == NULL)
939 {
940 /* unknown cipher */
941 al=SSL_AD_ILLEGAL_PARAMETER;
942 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
943 goto f_err;
944 }
945 /* TLS v1.2 only ciphersuites require v1.2 or later */
946 if ((c->algorithm_ssl & SSL_TLSV1_2) &&
947 (TLS1_get_version(s) < TLS1_2_VERSION))
948 {
949 al=SSL_AD_ILLEGAL_PARAMETER;
950 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
951 goto f_err;
952 }
953 p+=ssl_put_cipher_by_char(s,NULL,NULL);
954
955 sk=ssl_get_ciphers_by_id(s);
956 i=sk_SSL_CIPHER_find(sk,c);
957 if (i < 0)
958 {
959 /* we did not say we would use this cipher */
960 al=SSL_AD_ILLEGAL_PARAMETER;
961 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
962 goto f_err;
963 }
964
965 /* Depending on the session caching (internal/external), the cipher
966 and/or cipher_id values may not be set. Make sure that
967 cipher_id is set and use it for comparison. */
968 if (s->session->cipher)
969 s->session->cipher_id = s->session->cipher->id;
970 if (s->hit && (s->session->cipher_id != c->id))
971 {
972/* Workaround is now obsolete */
973#if 0
974 if (!(s->options &
975 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
976#endif
977 {
978 al=SSL_AD_ILLEGAL_PARAMETER;
979 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
980 goto f_err;
981 }
982 }
983 s->s3->tmp.new_cipher=c;
984 /* Don't digest cached records if TLS v1.2: we may need them for
985 * client authentication.
986 */
987 if (TLS1_get_version(s) < TLS1_2_VERSION && !ssl3_digest_cached_records(s))
988 {
989 al = SSL_AD_INTERNAL_ERROR;
990 goto f_err;
991 }
992 /* lets get the compression algorithm */
993 /* COMPRESSION */
994#ifdef OPENSSL_NO_COMP
995 if (*(p++) != 0)
996 {
997 al=SSL_AD_ILLEGAL_PARAMETER;
998 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
999 goto f_err;
1000 }
1001 /* If compression is disabled we'd better not try to resume a session
1002 * using compression.
1003 */
1004 if (s->session->compress_meth != 0)
1005 {
1006 al=SSL_AD_INTERNAL_ERROR;
1007 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1008 goto f_err;
1009 }
1010#else
1011 j= *(p++);
1012 if (s->hit && j != s->session->compress_meth)
1013 {
1014 al=SSL_AD_ILLEGAL_PARAMETER;
1015 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1016 goto f_err;
1017 }
1018 if (j == 0)
1019 comp=NULL;
1020 else if (s->options & SSL_OP_NO_COMPRESSION)
1021 {
1022 al=SSL_AD_ILLEGAL_PARAMETER;
1023 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1024 goto f_err;
1025 }
1026 else
1027 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1028
1029 if ((j != 0) && (comp == NULL))
1030 {
1031 al=SSL_AD_ILLEGAL_PARAMETER;
1032 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1033 goto f_err;
1034 }
1035 else
1036 {
1037 s->s3->tmp.new_compression=comp;
1038 }
1039#endif
1040
1041#ifndef OPENSSL_NO_TLSEXT
1042 /* TLS extensions*/
1043 if (s->version >= SSL3_VERSION)
1044 {
1045 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al))
1046 {
1047 /* 'al' set by ssl_parse_serverhello_tlsext */
1048 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1049 goto f_err;
1050 }
1051 if (ssl_check_serverhello_tlsext(s) <= 0)
1052 {
1053 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT);
1054 goto err;
1055 }
1056 }
1057#endif
1058
1059 if (p != (d+n))
1060 {
1061 /* wrong packet length */
1062 al=SSL_AD_DECODE_ERROR;
1063 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1064 goto f_err;
1065 }
1066
1067 return(1);
1068f_err:
1069 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1070err:
1071 return(-1);
1072 }
1073
1074int ssl3_get_server_certificate(SSL *s)
1075 {
1076 int al,i,ok,ret= -1;
1077 unsigned long n,nc,llen,l;
1078 X509 *x=NULL;
1079 const unsigned char *q,*p;
1080 unsigned char *d;
1081 STACK_OF(X509) *sk=NULL;
1082 SESS_CERT *sc;
1083 EVP_PKEY *pkey=NULL;
1084 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1085
1086 n=s->method->ssl_get_message(s,
1087 SSL3_ST_CR_CERT_A,
1088 SSL3_ST_CR_CERT_B,
1089 -1,
1090 s->max_cert_list,
1091 &ok);
1092
1093 if (!ok) return((int)n);
1094
1095 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1096 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1097 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1098 {
1099 s->s3->tmp.reuse_message=1;
1100 return(1);
1101 }
1102
1103 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1104 {
1105 al=SSL_AD_UNEXPECTED_MESSAGE;
1106 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1107 goto f_err;
1108 }
1109 p=d=(unsigned char *)s->init_msg;
1110
1111 if ((sk=sk_X509_new_null()) == NULL)
1112 {
1113 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1114 goto err;
1115 }
1116
1117 n2l3(p,llen);
1118 if (llen+3 != n)
1119 {
1120 al=SSL_AD_DECODE_ERROR;
1121 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1122 goto f_err;
1123 }
1124 for (nc=0; nc<llen; )
1125 {
1126 n2l3(p,l);
1127 if ((l+nc+3) > llen)
1128 {
1129 al=SSL_AD_DECODE_ERROR;
1130 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1131 goto f_err;
1132 }
1133
1134 q=p;
1135 x=d2i_X509(NULL,&q,l);
1136 if (x == NULL)
1137 {
1138 al=SSL_AD_BAD_CERTIFICATE;
1139 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1140 goto f_err;
1141 }
1142 if (q != (p+l))
1143 {
1144 al=SSL_AD_DECODE_ERROR;
1145 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1146 goto f_err;
1147 }
1148 if (!sk_X509_push(sk,x))
1149 {
1150 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1151 goto err;
1152 }
1153 x=NULL;
1154 nc+=l+3;
1155 p=q;
1156 }
1157
1158 i=ssl_verify_cert_chain(s,sk);
1159 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1160#ifndef OPENSSL_NO_KRB5
1161 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1162 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1163#endif /* OPENSSL_NO_KRB5 */
1164 )
1165 {
1166 al=ssl_verify_alarm_type(s->verify_result);
1167 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1168 goto f_err;
1169 }
1170 ERR_clear_error(); /* but we keep s->verify_result */
1171
1172 sc=ssl_sess_cert_new();
1173 if (sc == NULL) goto err;
1174
1175 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1176 s->session->sess_cert=sc;
1177
1178 sc->cert_chain=sk;
1179 /* Inconsistency alert: cert_chain does include the peer's
1180 * certificate, which we don't include in s3_srvr.c */
1181 x=sk_X509_value(sk,0);
1182 sk=NULL;
1183 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1184
1185 pkey=X509_get_pubkey(x);
1186
1187 /* VRS: allow null cert if auth == KRB5 */
1188 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1189 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1190 ? 0 : 1;
1191
1192#ifdef KSSL_DEBUG
1193 printf("pkey,x = %p, %p\n", pkey,x);
1194 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1195 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1196 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1197#endif /* KSSL_DEBUG */
1198
1199 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1200 {
1201 x=NULL;
1202 al=SSL3_AL_FATAL;
1203 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1204 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1205 goto f_err;
1206 }
1207
1208 i=ssl_cert_type(x,pkey);
1209 if (need_cert && i < 0)
1210 {
1211 x=NULL;
1212 al=SSL3_AL_FATAL;
1213 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1214 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1215 goto f_err;
1216 }
1217
1218 if (need_cert)
1219 {
1220 sc->peer_cert_type=i;
1221 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1222 /* Why would the following ever happen?
1223 * We just created sc a couple of lines ago. */
1224 if (sc->peer_pkeys[i].x509 != NULL)
1225 X509_free(sc->peer_pkeys[i].x509);
1226 sc->peer_pkeys[i].x509=x;
1227 sc->peer_key= &(sc->peer_pkeys[i]);
1228
1229 if (s->session->peer != NULL)
1230 X509_free(s->session->peer);
1231 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1232 s->session->peer=x;
1233 }
1234 else
1235 {
1236 sc->peer_cert_type=i;
1237 sc->peer_key= NULL;
1238
1239 if (s->session->peer != NULL)
1240 X509_free(s->session->peer);
1241 s->session->peer=NULL;
1242 }
1243 s->session->verify_result = s->verify_result;
1244
1245 x=NULL;
1246 ret=1;
1247
1248 if (0)
1249 {
1250f_err:
1251 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1252 }
1253err:
1254 EVP_PKEY_free(pkey);
1255 X509_free(x);
1256 sk_X509_pop_free(sk,X509_free);
1257 return(ret);
1258 }
1259
1260int ssl3_get_key_exchange(SSL *s)
1261 {
1262#ifndef OPENSSL_NO_RSA
1263 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1264#endif
1265 EVP_MD_CTX md_ctx;
1266 unsigned char *param,*p;
1267 int al,i,j,param_len,ok;
1268 long n,alg_k,alg_a;
1269 EVP_PKEY *pkey=NULL;
1270 const EVP_MD *md = NULL;
1271#ifndef OPENSSL_NO_RSA
1272 RSA *rsa=NULL;
1273#endif
1274#ifndef OPENSSL_NO_DH
1275 DH *dh=NULL;
1276#endif
1277#ifndef OPENSSL_NO_ECDH
1278 EC_KEY *ecdh = NULL;
1279 BN_CTX *bn_ctx = NULL;
1280 EC_POINT *srvr_ecpoint = NULL;
1281 int curve_nid = 0;
1282 int encoded_pt_len = 0;
1283#endif
1284
1285 /* use same message size as in ssl3_get_certificate_request()
1286 * as ServerKeyExchange message may be skipped */
1287 n=s->method->ssl_get_message(s,
1288 SSL3_ST_CR_KEY_EXCH_A,
1289 SSL3_ST_CR_KEY_EXCH_B,
1290 -1,
1291 s->max_cert_list,
1292 &ok);
1293 if (!ok) return((int)n);
1294
1295 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1296 {
1297#ifndef OPENSSL_NO_PSK
1298 /* In plain PSK ciphersuite, ServerKeyExchange can be
1299 omitted if no identity hint is sent. Set
1300 session->sess_cert anyway to avoid problems
1301 later.*/
1302 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1303 {
1304 s->session->sess_cert=ssl_sess_cert_new();
1305 if (s->ctx->psk_identity_hint)
1306 OPENSSL_free(s->ctx->psk_identity_hint);
1307 s->ctx->psk_identity_hint = NULL;
1308 }
1309#endif
1310 s->s3->tmp.reuse_message=1;
1311 return(1);
1312 }
1313
1314 param=p=(unsigned char *)s->init_msg;
1315 if (s->session->sess_cert != NULL)
1316 {
1317#ifndef OPENSSL_NO_RSA
1318 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1319 {
1320 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1321 s->session->sess_cert->peer_rsa_tmp=NULL;
1322 }
1323#endif
1324#ifndef OPENSSL_NO_DH
1325 if (s->session->sess_cert->peer_dh_tmp)
1326 {
1327 DH_free(s->session->sess_cert->peer_dh_tmp);
1328 s->session->sess_cert->peer_dh_tmp=NULL;
1329 }
1330#endif
1331#ifndef OPENSSL_NO_ECDH
1332 if (s->session->sess_cert->peer_ecdh_tmp)
1333 {
1334 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1335 s->session->sess_cert->peer_ecdh_tmp=NULL;
1336 }
1337#endif
1338 }
1339 else
1340 {
1341 s->session->sess_cert=ssl_sess_cert_new();
1342 }
1343
1344 param_len=0;
1345 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1346 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1347 EVP_MD_CTX_init(&md_ctx);
1348
1349#ifndef OPENSSL_NO_PSK
1350 if (alg_k & SSL_kPSK)
1351 {
1352 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1353
1354 al=SSL_AD_HANDSHAKE_FAILURE;
1355 n2s(p,i);
1356 param_len=i+2;
1357 /* Store PSK identity hint for later use, hint is used
1358 * in ssl3_send_client_key_exchange. Assume that the
1359 * maximum length of a PSK identity hint can be as
1360 * long as the maximum length of a PSK identity. */
1361 if (i > PSK_MAX_IDENTITY_LEN)
1362 {
1363 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1364 SSL_R_DATA_LENGTH_TOO_LONG);
1365 goto f_err;
1366 }
1367 if (param_len > n)
1368 {
1369 al=SSL_AD_DECODE_ERROR;
1370 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1371 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1372 goto f_err;
1373 }
1374 /* If received PSK identity hint contains NULL
1375 * characters, the hint is truncated from the first
1376 * NULL. p may not be ending with NULL, so create a
1377 * NULL-terminated string. */
1378 memcpy(tmp_id_hint, p, i);
1379 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1380 if (s->ctx->psk_identity_hint != NULL)
1381 OPENSSL_free(s->ctx->psk_identity_hint);
1382 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1383 if (s->ctx->psk_identity_hint == NULL)
1384 {
1385 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1386 goto f_err;
1387 }
1388
1389 p+=i;
1390 n-=param_len;
1391 }
1392 else
1393#endif /* !OPENSSL_NO_PSK */
1394#ifndef OPENSSL_NO_SRP
1395 if (alg_k & SSL_kSRP)
1396 {
1397 n2s(p,i);
1398 param_len=i+2;
1399 if (param_len > n)
1400 {
1401 al=SSL_AD_DECODE_ERROR;
1402 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1403 goto f_err;
1404 }
1405 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1406 {
1407 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1408 goto err;
1409 }
1410 p+=i;
1411
1412 n2s(p,i);
1413 param_len+=i+2;
1414 if (param_len > n)
1415 {
1416 al=SSL_AD_DECODE_ERROR;
1417 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1418 goto f_err;
1419 }
1420 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1421 {
1422 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1423 goto err;
1424 }
1425 p+=i;
1426
1427 i = (unsigned int)(p[0]);
1428 p++;
1429 param_len+=i+1;
1430 if (param_len > n)
1431 {
1432 al=SSL_AD_DECODE_ERROR;
1433 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1434 goto f_err;
1435 }
1436 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1437 {
1438 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1439 goto err;
1440 }
1441 p+=i;
1442
1443 n2s(p,i);
1444 param_len+=i+2;
1445 if (param_len > n)
1446 {
1447 al=SSL_AD_DECODE_ERROR;
1448 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1449 goto f_err;
1450 }
1451 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1452 {
1453 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1454 goto err;
1455 }
1456 p+=i;
1457 n-=param_len;
1458
1459/* We must check if there is a certificate */
1460#ifndef OPENSSL_NO_RSA
1461 if (alg_a & SSL_aRSA)
1462 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1463#else
1464 if (0)
1465 ;
1466#endif
1467#ifndef OPENSSL_NO_DSA
1468 else if (alg_a & SSL_aDSS)
1469 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1470#endif
1471 }
1472 else
1473#endif /* !OPENSSL_NO_SRP */
1474#ifndef OPENSSL_NO_RSA
1475 if (alg_k & SSL_kRSA)
1476 {
1477 if ((rsa=RSA_new()) == NULL)
1478 {
1479 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1480 goto err;
1481 }
1482 n2s(p,i);
1483 param_len=i+2;
1484 if (param_len > n)
1485 {
1486 al=SSL_AD_DECODE_ERROR;
1487 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1488 goto f_err;
1489 }
1490 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1491 {
1492 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1493 goto err;
1494 }
1495 p+=i;
1496
1497 n2s(p,i);
1498 param_len+=i+2;
1499 if (param_len > n)
1500 {
1501 al=SSL_AD_DECODE_ERROR;
1502 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1503 goto f_err;
1504 }
1505 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1506 {
1507 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1508 goto err;
1509 }
1510 p+=i;
1511 n-=param_len;
1512
1513 /* this should be because we are using an export cipher */
1514 if (alg_a & SSL_aRSA)
1515 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1516 else
1517 {
1518 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1519 goto err;
1520 }
1521 s->session->sess_cert->peer_rsa_tmp=rsa;
1522 rsa=NULL;
1523 }
1524#else /* OPENSSL_NO_RSA */
1525 if (0)
1526 ;
1527#endif
1528#ifndef OPENSSL_NO_DH
1529 else if (alg_k & SSL_kEDH)
1530 {
1531 if ((dh=DH_new()) == NULL)
1532 {
1533 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1534 goto err;
1535 }
1536 n2s(p,i);
1537 param_len=i+2;
1538 if (param_len > n)
1539 {
1540 al=SSL_AD_DECODE_ERROR;
1541 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1542 goto f_err;
1543 }
1544 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1545 {
1546 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1547 goto err;
1548 }
1549 p+=i;
1550
1551 n2s(p,i);
1552 param_len+=i+2;
1553 if (param_len > n)
1554 {
1555 al=SSL_AD_DECODE_ERROR;
1556 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1557 goto f_err;
1558 }
1559 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1560 {
1561 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1562 goto err;
1563 }
1564 p+=i;
1565
1566 n2s(p,i);
1567 param_len+=i+2;
1568 if (param_len > n)
1569 {
1570 al=SSL_AD_DECODE_ERROR;
1571 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1572 goto f_err;
1573 }
1574 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1575 {
1576 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1577 goto err;
1578 }
1579 p+=i;
1580 n-=param_len;
1581
1582#ifndef OPENSSL_NO_RSA
1583 if (alg_a & SSL_aRSA)
1584 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1585#else
1586 if (0)
1587 ;
1588#endif
1589#ifndef OPENSSL_NO_DSA
1590 else if (alg_a & SSL_aDSS)
1591 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1592#endif
1593 /* else anonymous DH, so no certificate or pkey. */
1594
1595 s->session->sess_cert->peer_dh_tmp=dh;
1596 dh=NULL;
1597 }
1598 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1599 {
1600 al=SSL_AD_ILLEGAL_PARAMETER;
1601 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1602 goto f_err;
1603 }
1604#endif /* !OPENSSL_NO_DH */
1605
1606#ifndef OPENSSL_NO_ECDH
1607 else if (alg_k & SSL_kEECDH)
1608 {
1609 EC_GROUP *ngroup;
1610 const EC_GROUP *group;
1611
1612 if ((ecdh=EC_KEY_new()) == NULL)
1613 {
1614 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1615 goto err;
1616 }
1617
1618 /* Extract elliptic curve parameters and the
1619 * server's ephemeral ECDH public key.
1620 * Keep accumulating lengths of various components in
1621 * param_len and make sure it never exceeds n.
1622 */
1623
1624 /* XXX: For now we only support named (not generic) curves
1625 * and the ECParameters in this case is just three bytes.
1626 */
1627 param_len=3;
1628 if ((param_len > n) ||
1629 (*p != NAMED_CURVE_TYPE) ||
1630 ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0))
1631 {
1632 al=SSL_AD_INTERNAL_ERROR;
1633 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1634 goto f_err;
1635 }
1636
1637 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1638 if (ngroup == NULL)
1639 {
1640 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1641 goto err;
1642 }
1643 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1644 {
1645 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1646 goto err;
1647 }
1648 EC_GROUP_free(ngroup);
1649
1650 group = EC_KEY_get0_group(ecdh);
1651
1652 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1653 (EC_GROUP_get_degree(group) > 163))
1654 {
1655 al=SSL_AD_EXPORT_RESTRICTION;
1656 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1657 goto f_err;
1658 }
1659
1660 p+=3;
1661
1662 /* Next, get the encoded ECPoint */
1663 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1664 ((bn_ctx = BN_CTX_new()) == NULL))
1665 {
1666 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1667 goto err;
1668 }
1669
1670 encoded_pt_len = *p; /* length of encoded point */
1671 p+=1;
1672 param_len += (1 + encoded_pt_len);
1673 if ((param_len > n) ||
1674 (EC_POINT_oct2point(group, srvr_ecpoint,
1675 p, encoded_pt_len, bn_ctx) == 0))
1676 {
1677 al=SSL_AD_DECODE_ERROR;
1678 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1679 goto f_err;
1680 }
1681
1682 n-=param_len;
1683 p+=encoded_pt_len;
1684
1685 /* The ECC/TLS specification does not mention
1686 * the use of DSA to sign ECParameters in the server
1687 * key exchange message. We do support RSA and ECDSA.
1688 */
1689 if (0) ;
1690#ifndef OPENSSL_NO_RSA
1691 else if (alg_a & SSL_aRSA)
1692 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1693#endif
1694#ifndef OPENSSL_NO_ECDSA
1695 else if (alg_a & SSL_aECDSA)
1696 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1697#endif
1698 /* else anonymous ECDH, so no certificate or pkey. */
1699 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1700 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1701 ecdh=NULL;
1702 BN_CTX_free(bn_ctx);
1703 bn_ctx = NULL;
1704 EC_POINT_free(srvr_ecpoint);
1705 srvr_ecpoint = NULL;
1706 }
1707 else if (alg_k)
1708 {
1709 al=SSL_AD_UNEXPECTED_MESSAGE;
1710 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1711 goto f_err;
1712 }
1713#endif /* !OPENSSL_NO_ECDH */
1714
1715
1716 /* p points to the next byte, there are 'n' bytes left */
1717
1718 /* if it was signed, check the signature */
1719 if (pkey != NULL)
1720 {
1721 if (TLS1_get_version(s) >= TLS1_2_VERSION)
1722 {
1723 int sigalg = tls12_get_sigid(pkey);
1724 /* Should never happen */
1725 if (sigalg == -1)
1726 {
1727 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1728 goto err;
1729 }
1730 /* Check key type is consistent with signature */
1731 if (sigalg != (int)p[1])
1732 {
1733 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_TYPE);
1734 al=SSL_AD_DECODE_ERROR;
1735 goto f_err;
1736 }
1737 md = tls12_get_hash(p[0]);
1738 if (md == NULL)
1739 {
1740 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNKNOWN_DIGEST);
1741 al=SSL_AD_DECODE_ERROR;
1742 goto f_err;
1743 }
1744#ifdef SSL_DEBUG
1745fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1746#endif
1747 p += 2;
1748 n -= 2;
1749 }
1750 else
1751 md = EVP_sha1();
1752
1753 n2s(p,i);
1754 n-=2;
1755 j=EVP_PKEY_size(pkey);
1756
1757 if ((i != n) || (n > j) || (n <= 0))
1758 {
1759 /* wrong packet length */
1760 al=SSL_AD_DECODE_ERROR;
1761 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1762 goto f_err;
1763 }
1764
1765#ifndef OPENSSL_NO_RSA
1766 if (pkey->type == EVP_PKEY_RSA && TLS1_get_version(s) < TLS1_2_VERSION)
1767 {
1768 int num;
1769
1770 j=0;
1771 q=md_buf;
1772 for (num=2; num > 0; num--)
1773 {
1774 EVP_MD_CTX_set_flags(&md_ctx,
1775 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1776 EVP_DigestInit_ex(&md_ctx,(num == 2)
1777 ?s->ctx->md5:s->ctx->sha1, NULL);
1778 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1779 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1780 EVP_DigestUpdate(&md_ctx,param,param_len);
1781 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1782 q+=i;
1783 j+=i;
1784 }
1785 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1786 pkey->pkey.rsa);
1787 if (i < 0)
1788 {
1789 al=SSL_AD_DECRYPT_ERROR;
1790 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1791 goto f_err;
1792 }
1793 if (i == 0)
1794 {
1795 /* bad signature */
1796 al=SSL_AD_DECRYPT_ERROR;
1797 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1798 goto f_err;
1799 }
1800 }
1801 else
1802#endif
1803 {
1804 EVP_VerifyInit_ex(&md_ctx, md, NULL);
1805 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1806 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1807 EVP_VerifyUpdate(&md_ctx,param,param_len);
1808 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1809 {
1810 /* bad signature */
1811 al=SSL_AD_DECRYPT_ERROR;
1812 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1813 goto f_err;
1814 }
1815 }
1816 }
1817 else
1818 {
1819 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
1820 /* aNULL or kPSK do not need public keys */
1821 {
1822 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1823 goto err;
1824 }
1825 /* still data left over */
1826 if (n != 0)
1827 {
1828 al=SSL_AD_DECODE_ERROR;
1829 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1830 goto f_err;
1831 }
1832 }
1833 EVP_PKEY_free(pkey);
1834 EVP_MD_CTX_cleanup(&md_ctx);
1835 return(1);
1836f_err:
1837 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1838err:
1839 EVP_PKEY_free(pkey);
1840#ifndef OPENSSL_NO_RSA
1841 if (rsa != NULL)
1842 RSA_free(rsa);
1843#endif
1844#ifndef OPENSSL_NO_DH
1845 if (dh != NULL)
1846 DH_free(dh);
1847#endif
1848#ifndef OPENSSL_NO_ECDH
1849 BN_CTX_free(bn_ctx);
1850 EC_POINT_free(srvr_ecpoint);
1851 if (ecdh != NULL)
1852 EC_KEY_free(ecdh);
1853#endif
1854 EVP_MD_CTX_cleanup(&md_ctx);
1855 return(-1);
1856 }
1857
1858int ssl3_get_certificate_request(SSL *s)
1859 {
1860 int ok,ret=0;
1861 unsigned long n,nc,l;
1862 unsigned int llen, ctype_num,i;
1863 X509_NAME *xn=NULL;
1864 const unsigned char *p,*q;
1865 unsigned char *d;
1866 STACK_OF(X509_NAME) *ca_sk=NULL;
1867
1868 n=s->method->ssl_get_message(s,
1869 SSL3_ST_CR_CERT_REQ_A,
1870 SSL3_ST_CR_CERT_REQ_B,
1871 -1,
1872 s->max_cert_list,
1873 &ok);
1874
1875 if (!ok) return((int)n);
1876
1877 s->s3->tmp.cert_req=0;
1878
1879 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1880 {
1881 s->s3->tmp.reuse_message=1;
1882 /* If we get here we don't need any cached handshake records
1883 * as we wont be doing client auth.
1884 */
1885 if (s->s3->handshake_buffer)
1886 {
1887 if (!ssl3_digest_cached_records(s))
1888 goto err;
1889 }
1890 return(1);
1891 }
1892
1893 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1894 {
1895 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1896 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1897 goto err;
1898 }
1899
1900 /* TLS does not like anon-DH with client cert */
1901 if (s->version > SSL3_VERSION)
1902 {
1903 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
1904 {
1905 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1906 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1907 goto err;
1908 }
1909 }
1910
1911 p=d=(unsigned char *)s->init_msg;
1912
1913 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1914 {
1915 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1916 goto err;
1917 }
1918
1919 /* get the certificate types */
1920 ctype_num= *(p++);
1921 if (ctype_num > SSL3_CT_NUMBER)
1922 ctype_num=SSL3_CT_NUMBER;
1923 for (i=0; i<ctype_num; i++)
1924 s->s3->tmp.ctype[i]= p[i];
1925 p+=ctype_num;
1926 if (TLS1_get_version(s) >= TLS1_2_VERSION)
1927 {
1928 n2s(p, llen);
1929 /* Check we have enough room for signature algorithms and
1930 * following length value.
1931 */
1932 if ((unsigned long)(p - d + llen + 2) > n)
1933 {
1934 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1935 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
1936 goto err;
1937 }
1938 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen))
1939 {
1940 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1941 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
1942 goto err;
1943 }
1944 p += llen;
1945 }
1946
1947 /* get the CA RDNs */
1948 n2s(p,llen);
1949#if 0
1950{
1951FILE *out;
1952out=fopen("/tmp/vsign.der","w");
1953fwrite(p,1,llen,out);
1954fclose(out);
1955}
1956#endif
1957
1958 if ((unsigned long)(p - d + llen) != n)
1959 {
1960 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1961 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1962 goto err;
1963 }
1964
1965 for (nc=0; nc<llen; )
1966 {
1967 n2s(p,l);
1968 if ((l+nc+2) > llen)
1969 {
1970 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1971 goto cont; /* netscape bugs */
1972 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1973 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1974 goto err;
1975 }
1976
1977 q=p;
1978
1979 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1980 {
1981 /* If netscape tolerance is on, ignore errors */
1982 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1983 goto cont;
1984 else
1985 {
1986 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1987 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1988 goto err;
1989 }
1990 }
1991
1992 if (q != (p+l))
1993 {
1994 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1995 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1996 goto err;
1997 }
1998 if (!sk_X509_NAME_push(ca_sk,xn))
1999 {
2000 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2001 goto err;
2002 }
2003
2004 p+=l;
2005 nc+=l+2;
2006 }
2007
2008 if (0)
2009 {
2010cont:
2011 ERR_clear_error();
2012 }
2013
2014 /* we should setup a certificate to return.... */
2015 s->s3->tmp.cert_req=1;
2016 s->s3->tmp.ctype_num=ctype_num;
2017 if (s->s3->tmp.ca_names != NULL)
2018 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2019 s->s3->tmp.ca_names=ca_sk;
2020 ca_sk=NULL;
2021
2022 ret=1;
2023err:
2024 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2025 return(ret);
2026 }
2027
2028static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2029 {
2030 return(X509_NAME_cmp(*a,*b));
2031 }
2032#ifndef OPENSSL_NO_TLSEXT
2033int ssl3_get_new_session_ticket(SSL *s)
2034 {
2035 int ok,al,ret=0, ticklen;
2036 long n;
2037 const unsigned char *p;
2038 unsigned char *d;
2039
2040 n=s->method->ssl_get_message(s,
2041 SSL3_ST_CR_SESSION_TICKET_A,
2042 SSL3_ST_CR_SESSION_TICKET_B,
2043 -1,
2044 16384,
2045 &ok);
2046
2047 if (!ok)
2048 return((int)n);
2049
2050 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
2051 {
2052 s->s3->tmp.reuse_message=1;
2053 return(1);
2054 }
2055 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
2056 {
2057 al=SSL_AD_UNEXPECTED_MESSAGE;
2058 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2059 goto f_err;
2060 }
2061 if (n < 6)
2062 {
2063 /* need at least ticket_lifetime_hint + ticket length */
2064 al = SSL_AD_DECODE_ERROR;
2065 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2066 goto f_err;
2067 }
2068
2069 p=d=(unsigned char *)s->init_msg;
2070 n2l(p, s->session->tlsext_tick_lifetime_hint);
2071 n2s(p, ticklen);
2072 /* ticket_lifetime_hint + ticket_length + ticket */
2073 if (ticklen + 6 != n)
2074 {
2075 al = SSL_AD_DECODE_ERROR;
2076 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2077 goto f_err;
2078 }
2079 if (s->session->tlsext_tick)
2080 {
2081 OPENSSL_free(s->session->tlsext_tick);
2082 s->session->tlsext_ticklen = 0;
2083 }
2084 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2085 if (!s->session->tlsext_tick)
2086 {
2087 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2088 goto err;
2089 }
2090 memcpy(s->session->tlsext_tick, p, ticklen);
2091 s->session->tlsext_ticklen = ticklen;
2092 /* There are two ways to detect a resumed ticket sesion.
2093 * One is to set an appropriate session ID and then the server
2094 * must return a match in ServerHello. This allows the normal
2095 * client session ID matching to work and we know much
2096 * earlier that the ticket has been accepted.
2097 *
2098 * The other way is to set zero length session ID when the
2099 * ticket is presented and rely on the handshake to determine
2100 * session resumption.
2101 *
2102 * We choose the former approach because this fits in with
2103 * assumptions elsewhere in OpenSSL. The session ID is set
2104 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2105 * ticket.
2106 */
2107 EVP_Digest(p, ticklen,
2108 s->session->session_id, &s->session->session_id_length,
2109#ifndef OPENSSL_NO_SHA256
2110 EVP_sha256(), NULL);
2111#else
2112 EVP_sha1(), NULL);
2113#endif
2114 ret=1;
2115 return(ret);
2116f_err:
2117 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2118err:
2119 return(-1);
2120 }
2121
2122int ssl3_get_cert_status(SSL *s)
2123 {
2124 int ok, al;
2125 unsigned long resplen,n;
2126 const unsigned char *p;
2127
2128 n=s->method->ssl_get_message(s,
2129 SSL3_ST_CR_CERT_STATUS_A,
2130 SSL3_ST_CR_CERT_STATUS_B,
2131 SSL3_MT_CERTIFICATE_STATUS,
2132 16384,
2133 &ok);
2134
2135 if (!ok) return((int)n);
2136 if (n < 4)
2137 {
2138 /* need at least status type + length */
2139 al = SSL_AD_DECODE_ERROR;
2140 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2141 goto f_err;
2142 }
2143 p = (unsigned char *)s->init_msg;
2144 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2145 {
2146 al = SSL_AD_DECODE_ERROR;
2147 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2148 goto f_err;
2149 }
2150 n2l3(p, resplen);
2151 if (resplen + 4 != n)
2152 {
2153 al = SSL_AD_DECODE_ERROR;
2154 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2155 goto f_err;
2156 }
2157 if (s->tlsext_ocsp_resp)
2158 OPENSSL_free(s->tlsext_ocsp_resp);
2159 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2160 if (!s->tlsext_ocsp_resp)
2161 {
2162 al = SSL_AD_INTERNAL_ERROR;
2163 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2164 goto f_err;
2165 }
2166 s->tlsext_ocsp_resplen = resplen;
2167 if (s->ctx->tlsext_status_cb)
2168 {
2169 int ret;
2170 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2171 if (ret == 0)
2172 {
2173 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2174 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2175 goto f_err;
2176 }
2177 if (ret < 0)
2178 {
2179 al = SSL_AD_INTERNAL_ERROR;
2180 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2181 goto f_err;
2182 }
2183 }
2184 return 1;
2185f_err:
2186 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2187 return(-1);
2188 }
2189#endif
2190
2191int ssl3_get_server_done(SSL *s)
2192 {
2193 int ok,ret=0;
2194 long n;
2195
2196 n=s->method->ssl_get_message(s,
2197 SSL3_ST_CR_SRVR_DONE_A,
2198 SSL3_ST_CR_SRVR_DONE_B,
2199 SSL3_MT_SERVER_DONE,
2200 30, /* should be very small, like 0 :-) */
2201 &ok);
2202
2203 if (!ok) return((int)n);
2204 if (n > 0)
2205 {
2206 /* should contain no data */
2207 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2208 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2209 return -1;
2210 }
2211 ret=1;
2212 return(ret);
2213 }
2214
2215
2216int ssl3_send_client_key_exchange(SSL *s)
2217 {
2218 unsigned char *p,*d;
2219 int n;
2220 unsigned long alg_k;
2221#ifndef OPENSSL_NO_RSA
2222 unsigned char *q;
2223 EVP_PKEY *pkey=NULL;
2224#endif
2225#ifndef OPENSSL_NO_KRB5
2226 KSSL_ERR kssl_err;
2227#endif /* OPENSSL_NO_KRB5 */
2228#ifndef OPENSSL_NO_ECDH
2229 EC_KEY *clnt_ecdh = NULL;
2230 const EC_POINT *srvr_ecpoint = NULL;
2231 EVP_PKEY *srvr_pub_pkey = NULL;
2232 unsigned char *encodedPoint = NULL;
2233 int encoded_pt_len = 0;
2234 BN_CTX * bn_ctx = NULL;
2235#endif
2236
2237 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2238 {
2239 d=(unsigned char *)s->init_buf->data;
2240 p= &(d[4]);
2241
2242 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2243
2244 /* Fool emacs indentation */
2245 if (0) {}
2246#ifndef OPENSSL_NO_RSA
2247 else if (alg_k & SSL_kRSA)
2248 {
2249 RSA *rsa;
2250 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2251
2252 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2253 rsa=s->session->sess_cert->peer_rsa_tmp;
2254 else
2255 {
2256 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2257 if ((pkey == NULL) ||
2258 (pkey->type != EVP_PKEY_RSA) ||
2259 (pkey->pkey.rsa == NULL))
2260 {
2261 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2262 goto err;
2263 }
2264 rsa=pkey->pkey.rsa;
2265 EVP_PKEY_free(pkey);
2266 }
2267
2268 tmp_buf[0]=s->client_version>>8;
2269 tmp_buf[1]=s->client_version&0xff;
2270 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2271 goto err;
2272
2273 s->session->master_key_length=sizeof tmp_buf;
2274
2275 q=p;
2276 /* Fix buf for TLS and beyond */
2277 if (s->version > SSL3_VERSION)
2278 p+=2;
2279 n=RSA_public_encrypt(sizeof tmp_buf,
2280 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2281#ifdef PKCS1_CHECK
2282 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2283 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2284#endif
2285 if (n <= 0)
2286 {
2287 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2288 goto err;
2289 }
2290
2291 /* Fix buf for TLS and beyond */
2292 if (s->version > SSL3_VERSION)
2293 {
2294 s2n(n,q);
2295 n+=2;
2296 }
2297
2298 s->session->master_key_length=
2299 s->method->ssl3_enc->generate_master_secret(s,
2300 s->session->master_key,
2301 tmp_buf,sizeof tmp_buf);
2302 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2303 }
2304#endif
2305#ifndef OPENSSL_NO_KRB5
2306 else if (alg_k & SSL_kKRB5)
2307 {
2308 krb5_error_code krb5rc;
2309 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2310 /* krb5_data krb5_ap_req; */
2311 krb5_data *enc_ticket;
2312 krb5_data authenticator, *authp = NULL;
2313 EVP_CIPHER_CTX ciph_ctx;
2314 const EVP_CIPHER *enc = NULL;
2315 unsigned char iv[EVP_MAX_IV_LENGTH];
2316 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2317 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2318 + EVP_MAX_IV_LENGTH];
2319 int padl, outl = sizeof(epms);
2320
2321 EVP_CIPHER_CTX_init(&ciph_ctx);
2322
2323#ifdef KSSL_DEBUG
2324 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2325 alg_k, SSL_kKRB5);
2326#endif /* KSSL_DEBUG */
2327
2328 authp = NULL;
2329#ifdef KRB5SENDAUTH
2330 if (KRB5SENDAUTH) authp = &authenticator;
2331#endif /* KRB5SENDAUTH */
2332
2333 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2334 &kssl_err);
2335 enc = kssl_map_enc(kssl_ctx->enctype);
2336 if (enc == NULL)
2337 goto err;
2338#ifdef KSSL_DEBUG
2339 {
2340 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2341 if (krb5rc && kssl_err.text)
2342 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2343 }
2344#endif /* KSSL_DEBUG */
2345
2346 if (krb5rc)
2347 {
2348 ssl3_send_alert(s,SSL3_AL_FATAL,
2349 SSL_AD_HANDSHAKE_FAILURE);
2350 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2351 kssl_err.reason);
2352 goto err;
2353 }
2354
2355 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2356 ** in place of RFC 2712 KerberosWrapper, as in:
2357 **
2358 ** Send ticket (copy to *p, set n = length)
2359 ** n = krb5_ap_req.length;
2360 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2361 ** if (krb5_ap_req.data)
2362 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2363 **
2364 ** Now using real RFC 2712 KerberosWrapper
2365 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2366 ** Note: 2712 "opaque" types are here replaced
2367 ** with a 2-byte length followed by the value.
2368 ** Example:
2369 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2370 ** Where "xx xx" = length bytes. Shown here with
2371 ** optional authenticator omitted.
2372 */
2373
2374 /* KerberosWrapper.Ticket */
2375 s2n(enc_ticket->length,p);
2376 memcpy(p, enc_ticket->data, enc_ticket->length);
2377 p+= enc_ticket->length;
2378 n = enc_ticket->length + 2;
2379
2380 /* KerberosWrapper.Authenticator */
2381 if (authp && authp->length)
2382 {
2383 s2n(authp->length,p);
2384 memcpy(p, authp->data, authp->length);
2385 p+= authp->length;
2386 n+= authp->length + 2;
2387
2388 free(authp->data);
2389 authp->data = NULL;
2390 authp->length = 0;
2391 }
2392 else
2393 {
2394 s2n(0,p);/* null authenticator length */
2395 n+=2;
2396 }
2397
2398 tmp_buf[0]=s->client_version>>8;
2399 tmp_buf[1]=s->client_version&0xff;
2400 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2401 goto err;
2402
2403 /* 20010420 VRS. Tried it this way; failed.
2404 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2405 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2406 ** kssl_ctx->length);
2407 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2408 */
2409
2410 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2411 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2412 kssl_ctx->key,iv);
2413 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2414 sizeof tmp_buf);
2415 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2416 outl += padl;
2417 if (outl > (int)sizeof epms)
2418 {
2419 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2420 goto err;
2421 }
2422 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2423
2424 /* KerberosWrapper.EncryptedPreMasterSecret */
2425 s2n(outl,p);
2426 memcpy(p, epms, outl);
2427 p+=outl;
2428 n+=outl + 2;
2429
2430 s->session->master_key_length=
2431 s->method->ssl3_enc->generate_master_secret(s,
2432 s->session->master_key,
2433 tmp_buf, sizeof tmp_buf);
2434
2435 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2436 OPENSSL_cleanse(epms, outl);
2437 }
2438#endif
2439#ifndef OPENSSL_NO_DH
2440 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2441 {
2442 DH *dh_srvr,*dh_clnt;
2443
2444 if (s->session->sess_cert == NULL)
2445 {
2446 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2447 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2448 goto err;
2449 }
2450
2451 if (s->session->sess_cert->peer_dh_tmp != NULL)
2452 dh_srvr=s->session->sess_cert->peer_dh_tmp;
2453 else
2454 {
2455 /* we get them from the cert */
2456 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2457 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
2458 goto err;
2459 }
2460
2461 /* generate a new random key */
2462 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2463 {
2464 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2465 goto err;
2466 }
2467 if (!DH_generate_key(dh_clnt))
2468 {
2469 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2470 DH_free(dh_clnt);
2471 goto err;
2472 }
2473
2474 /* use the 'p' output buffer for the DH key, but
2475 * make sure to clear it out afterwards */
2476
2477 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2478
2479 if (n <= 0)
2480 {
2481 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2482 DH_free(dh_clnt);
2483 goto err;
2484 }
2485
2486 /* generate master key from the result */
2487 s->session->master_key_length=
2488 s->method->ssl3_enc->generate_master_secret(s,
2489 s->session->master_key,p,n);
2490 /* clean up */
2491 memset(p,0,n);
2492
2493 /* send off the data */
2494 n=BN_num_bytes(dh_clnt->pub_key);
2495 s2n(n,p);
2496 BN_bn2bin(dh_clnt->pub_key,p);
2497 n+=2;
2498
2499 DH_free(dh_clnt);
2500
2501 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2502 }
2503#endif
2504
2505#ifndef OPENSSL_NO_ECDH
2506 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
2507 {
2508 const EC_GROUP *srvr_group = NULL;
2509 EC_KEY *tkey;
2510 int ecdh_clnt_cert = 0;
2511 int field_size = 0;
2512
2513 /* Did we send out the client's
2514 * ECDH share for use in premaster
2515 * computation as part of client certificate?
2516 * If so, set ecdh_clnt_cert to 1.
2517 */
2518 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2519 {
2520 /* XXX: For now, we do not support client
2521 * authentication using ECDH certificates.
2522 * To add such support, one needs to add
2523 * code that checks for appropriate
2524 * conditions and sets ecdh_clnt_cert to 1.
2525 * For example, the cert have an ECC
2526 * key on the same curve as the server's
2527 * and the key should be authorized for
2528 * key agreement.
2529 *
2530 * One also needs to add code in ssl3_connect
2531 * to skip sending the certificate verify
2532 * message.
2533 *
2534 * if ((s->cert->key->privatekey != NULL) &&
2535 * (s->cert->key->privatekey->type ==
2536 * EVP_PKEY_EC) && ...)
2537 * ecdh_clnt_cert = 1;
2538 */
2539 }
2540
2541 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2542 {
2543 tkey = s->session->sess_cert->peer_ecdh_tmp;
2544 }
2545 else
2546 {
2547 /* Get the Server Public Key from Cert */
2548 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2549 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2550 if ((srvr_pub_pkey == NULL) ||
2551 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2552 (srvr_pub_pkey->pkey.ec == NULL))
2553 {
2554 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2555 ERR_R_INTERNAL_ERROR);
2556 goto err;
2557 }
2558
2559 tkey = srvr_pub_pkey->pkey.ec;
2560 }
2561
2562 srvr_group = EC_KEY_get0_group(tkey);
2563 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2564
2565 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2566 {
2567 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2568 ERR_R_INTERNAL_ERROR);
2569 goto err;
2570 }
2571
2572 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2573 {
2574 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2575 goto err;
2576 }
2577
2578 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2579 {
2580 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2581 goto err;
2582 }
2583 if (ecdh_clnt_cert)
2584 {
2585 /* Reuse key info from our certificate
2586 * We only need our private key to perform
2587 * the ECDH computation.
2588 */
2589 const BIGNUM *priv_key;
2590 tkey = s->cert->key->privatekey->pkey.ec;
2591 priv_key = EC_KEY_get0_private_key(tkey);
2592 if (priv_key == NULL)
2593 {
2594 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2595 goto err;
2596 }
2597 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2598 {
2599 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2600 goto err;
2601 }
2602 }
2603 else
2604 {
2605 /* Generate a new ECDH key pair */
2606 if (!(EC_KEY_generate_key(clnt_ecdh)))
2607 {
2608 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2609 goto err;
2610 }
2611 }
2612
2613 /* use the 'p' output buffer for the ECDH key, but
2614 * make sure to clear it out afterwards
2615 */
2616
2617 field_size = EC_GROUP_get_degree(srvr_group);
2618 if (field_size <= 0)
2619 {
2620 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2621 ERR_R_ECDH_LIB);
2622 goto err;
2623 }
2624 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2625 if (n <= 0)
2626 {
2627 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2628 ERR_R_ECDH_LIB);
2629 goto err;
2630 }
2631
2632 /* generate master key from the result */
2633 s->session->master_key_length = s->method->ssl3_enc \
2634 -> generate_master_secret(s,
2635 s->session->master_key,
2636 p, n);
2637
2638 memset(p, 0, n); /* clean up */
2639
2640 if (ecdh_clnt_cert)
2641 {
2642 /* Send empty client key exch message */
2643 n = 0;
2644 }
2645 else
2646 {
2647 /* First check the size of encoding and
2648 * allocate memory accordingly.
2649 */
2650 encoded_pt_len =
2651 EC_POINT_point2oct(srvr_group,
2652 EC_KEY_get0_public_key(clnt_ecdh),
2653 POINT_CONVERSION_UNCOMPRESSED,
2654 NULL, 0, NULL);
2655
2656 encodedPoint = (unsigned char *)
2657 OPENSSL_malloc(encoded_pt_len *
2658 sizeof(unsigned char));
2659 bn_ctx = BN_CTX_new();
2660 if ((encodedPoint == NULL) ||
2661 (bn_ctx == NULL))
2662 {
2663 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2664 goto err;
2665 }
2666
2667 /* Encode the public key */
2668 n = EC_POINT_point2oct(srvr_group,
2669 EC_KEY_get0_public_key(clnt_ecdh),
2670 POINT_CONVERSION_UNCOMPRESSED,
2671 encodedPoint, encoded_pt_len, bn_ctx);
2672
2673 *p = n; /* length of encoded point */
2674 /* Encoded point will be copied here */
2675 p += 1;
2676 /* copy the point */
2677 memcpy((unsigned char *)p, encodedPoint, n);
2678 /* increment n to account for length field */
2679 n += 1;
2680 }
2681
2682 /* Free allocated memory */
2683 BN_CTX_free(bn_ctx);
2684 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2685 if (clnt_ecdh != NULL)
2686 EC_KEY_free(clnt_ecdh);
2687 EVP_PKEY_free(srvr_pub_pkey);
2688 }
2689#endif /* !OPENSSL_NO_ECDH */
2690 else if (alg_k & SSL_kGOST)
2691 {
2692 /* GOST key exchange message creation */
2693 EVP_PKEY_CTX *pkey_ctx;
2694 X509 *peer_cert;
2695 size_t msglen;
2696 unsigned int md_len;
2697 int keytype;
2698 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2699 EVP_MD_CTX *ukm_hash;
2700 EVP_PKEY *pub_key;
2701
2702 /* Get server sertificate PKEY and create ctx from it */
2703 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2704 if (!peer_cert)
2705 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2706 if (!peer_cert) {
2707 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2708 goto err;
2709 }
2710
2711 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2712 /* If we have send a certificate, and certificate key
2713
2714 * parameters match those of server certificate, use
2715 * certificate key for key exchange
2716 */
2717
2718 /* Otherwise, generate ephemeral key pair */
2719
2720 EVP_PKEY_encrypt_init(pkey_ctx);
2721 /* Generate session key */
2722 RAND_bytes(premaster_secret,32);
2723 /* If we have client certificate, use its secret as peer key */
2724 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2725 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
2726 /* If there was an error - just ignore it. Ephemeral key
2727 * would be used
2728 */
2729 ERR_clear_error();
2730 }
2731 }
2732 /* Compute shared IV and store it in algorithm-specific
2733 * context data */
2734 ukm_hash = EVP_MD_CTX_create();
2735 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
2736 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
2737 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
2738 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2739 EVP_MD_CTX_destroy(ukm_hash);
2740 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
2741 8,shared_ukm)<0) {
2742 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2743 SSL_R_LIBRARY_BUG);
2744 goto err;
2745 }
2746 /* Make GOST keytransport blob message */
2747 /*Encapsulate it into sequence */
2748 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2749 msglen=255;
2750 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
2751 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2752 SSL_R_LIBRARY_BUG);
2753 goto err;
2754 }
2755 if (msglen >= 0x80)
2756 {
2757 *(p++)=0x81;
2758 *(p++)= msglen & 0xff;
2759 n=msglen+3;
2760 }
2761 else
2762 {
2763 *(p++)= msglen & 0xff;
2764 n=msglen+2;
2765 }
2766 memcpy(p, tmp, msglen);
2767 /* Check if pubkey from client certificate was used */
2768 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2769 {
2770 /* Set flag "skip certificate verify" */
2771 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2772 }
2773 EVP_PKEY_CTX_free(pkey_ctx);
2774 s->session->master_key_length=
2775 s->method->ssl3_enc->generate_master_secret(s,
2776 s->session->master_key,premaster_secret,32);
2777 EVP_PKEY_free(pub_key);
2778
2779 }
2780#ifndef OPENSSL_NO_SRP
2781 else if (alg_k & SSL_kSRP)
2782 {
2783 if (s->srp_ctx.A != NULL)
2784 {
2785 /* send off the data */
2786 n=BN_num_bytes(s->srp_ctx.A);
2787 s2n(n,p);
2788 BN_bn2bin(s->srp_ctx.A,p);
2789 n+=2;
2790 }
2791 else
2792 {
2793 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2794 goto err;
2795 }
2796 if (s->session->srp_username != NULL)
2797 OPENSSL_free(s->session->srp_username);
2798 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2799 if (s->session->srp_username == NULL)
2800 {
2801 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2802 ERR_R_MALLOC_FAILURE);
2803 goto err;
2804 }
2805
2806 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
2807 {
2808 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2809 goto err;
2810 }
2811 }
2812#endif
2813#ifndef OPENSSL_NO_PSK
2814 else if (alg_k & SSL_kPSK)
2815 {
2816 char identity[PSK_MAX_IDENTITY_LEN];
2817 unsigned char *t = NULL;
2818 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
2819 unsigned int pre_ms_len = 0, psk_len = 0;
2820 int psk_err = 1;
2821
2822 n = 0;
2823 if (s->psk_client_callback == NULL)
2824 {
2825 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2826 SSL_R_PSK_NO_CLIENT_CB);
2827 goto err;
2828 }
2829
2830 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
2831 identity, PSK_MAX_IDENTITY_LEN,
2832 psk_or_pre_ms, sizeof(psk_or_pre_ms));
2833 if (psk_len > PSK_MAX_PSK_LEN)
2834 {
2835 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2836 ERR_R_INTERNAL_ERROR);
2837 goto psk_err;
2838 }
2839 else if (psk_len == 0)
2840 {
2841 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2842 SSL_R_PSK_IDENTITY_NOT_FOUND);
2843 goto psk_err;
2844 }
2845
2846 /* create PSK pre_master_secret */
2847 pre_ms_len = 2+psk_len+2+psk_len;
2848 t = psk_or_pre_ms;
2849 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
2850 s2n(psk_len, t);
2851 memset(t, 0, psk_len);
2852 t+=psk_len;
2853 s2n(psk_len, t);
2854
2855 if (s->session->psk_identity_hint != NULL)
2856 OPENSSL_free(s->session->psk_identity_hint);
2857 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
2858 if (s->ctx->psk_identity_hint != NULL &&
2859 s->session->psk_identity_hint == NULL)
2860 {
2861 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2862 ERR_R_MALLOC_FAILURE);
2863 goto psk_err;
2864 }
2865
2866 if (s->session->psk_identity != NULL)
2867 OPENSSL_free(s->session->psk_identity);
2868 s->session->psk_identity = BUF_strdup(identity);
2869 if (s->session->psk_identity == NULL)
2870 {
2871 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2872 ERR_R_MALLOC_FAILURE);
2873 goto psk_err;
2874 }
2875
2876 s->session->master_key_length =
2877 s->method->ssl3_enc->generate_master_secret(s,
2878 s->session->master_key,
2879 psk_or_pre_ms, pre_ms_len);
2880 n = strlen(identity);
2881 s2n(n, p);
2882 memcpy(p, identity, n);
2883 n+=2;
2884 psk_err = 0;
2885 psk_err:
2886 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
2887 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
2888 if (psk_err != 0)
2889 {
2890 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2891 goto err;
2892 }
2893 }
2894#endif
2895 else
2896 {
2897 ssl3_send_alert(s, SSL3_AL_FATAL,
2898 SSL_AD_HANDSHAKE_FAILURE);
2899 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2900 ERR_R_INTERNAL_ERROR);
2901 goto err;
2902 }
2903
2904 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
2905 l2n3(n,d);
2906
2907 s->state=SSL3_ST_CW_KEY_EXCH_B;
2908 /* number of bytes to write */
2909 s->init_num=n+4;
2910 s->init_off=0;
2911 }
2912
2913 /* SSL3_ST_CW_KEY_EXCH_B */
2914 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2915err:
2916#ifndef OPENSSL_NO_ECDH
2917 BN_CTX_free(bn_ctx);
2918 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2919 if (clnt_ecdh != NULL)
2920 EC_KEY_free(clnt_ecdh);
2921 EVP_PKEY_free(srvr_pub_pkey);
2922#endif
2923 return(-1);
2924 }
2925
2926int ssl3_send_client_verify(SSL *s)
2927 {
2928 unsigned char *p,*d;
2929 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
2930 EVP_PKEY *pkey;
2931 EVP_PKEY_CTX *pctx=NULL;
2932 EVP_MD_CTX mctx;
2933 unsigned u=0;
2934 unsigned long n;
2935 int j;
2936
2937 EVP_MD_CTX_init(&mctx);
2938
2939 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
2940 {
2941 d=(unsigned char *)s->init_buf->data;
2942 p= &(d[4]);
2943 pkey=s->cert->key->privatekey;
2944/* Create context from key and test if sha1 is allowed as digest */
2945 pctx = EVP_PKEY_CTX_new(pkey,NULL);
2946 EVP_PKEY_sign_init(pctx);
2947 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
2948 {
2949 if (TLS1_get_version(s) < TLS1_2_VERSION)
2950 s->method->ssl3_enc->cert_verify_mac(s,
2951 NID_sha1,
2952 &(data[MD5_DIGEST_LENGTH]));
2953 }
2954 else
2955 {
2956 ERR_clear_error();
2957 }
2958 /* For TLS v1.2 send signature algorithm and signature
2959 * using agreed digest and cached handshake records.
2960 */
2961 if (TLS1_get_version(s) >= TLS1_2_VERSION)
2962 {
2963 long hdatalen = 0;
2964 void *hdata;
2965 const EVP_MD *md = s->cert->key->digest;
2966 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
2967 &hdata);
2968 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
2969 {
2970 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2971 ERR_R_INTERNAL_ERROR);
2972 goto err;
2973 }
2974 p += 2;
2975#ifdef SSL_DEBUG
2976 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
2977 EVP_MD_name(md));
2978#endif
2979 if (!EVP_SignInit_ex(&mctx, md, NULL)
2980 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
2981 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
2982 {
2983 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2984 ERR_R_EVP_LIB);
2985 goto err;
2986 }
2987 s2n(u,p);
2988 n = u + 4;
2989 if (!ssl3_digest_cached_records(s))
2990 goto err;
2991 }
2992 else
2993#ifndef OPENSSL_NO_RSA
2994 if (pkey->type == EVP_PKEY_RSA)
2995 {
2996 s->method->ssl3_enc->cert_verify_mac(s,
2997 NID_md5,
2998 &(data[0]));
2999 if (RSA_sign(NID_md5_sha1, data,
3000 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3001 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3002 {
3003 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3004 goto err;
3005 }
3006 s2n(u,p);
3007 n=u+2;
3008 }
3009 else
3010#endif
3011#ifndef OPENSSL_NO_DSA
3012 if (pkey->type == EVP_PKEY_DSA)
3013 {
3014 if (!DSA_sign(pkey->save_type,
3015 &(data[MD5_DIGEST_LENGTH]),
3016 SHA_DIGEST_LENGTH,&(p[2]),
3017 (unsigned int *)&j,pkey->pkey.dsa))
3018 {
3019 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3020 goto err;
3021 }
3022 s2n(j,p);
3023 n=j+2;
3024 }
3025 else
3026#endif
3027#ifndef OPENSSL_NO_ECDSA
3028 if (pkey->type == EVP_PKEY_EC)
3029 {
3030 if (!ECDSA_sign(pkey->save_type,
3031 &(data[MD5_DIGEST_LENGTH]),
3032 SHA_DIGEST_LENGTH,&(p[2]),
3033 (unsigned int *)&j,pkey->pkey.ec))
3034 {
3035 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3036 ERR_R_ECDSA_LIB);
3037 goto err;
3038 }
3039 s2n(j,p);
3040 n=j+2;
3041 }
3042 else
3043#endif
3044 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3045 {
3046 unsigned char signbuf[64];
3047 int i;
3048 size_t sigsize=64;
3049 s->method->ssl3_enc->cert_verify_mac(s,
3050 NID_id_GostR3411_94,
3051 data);
3052 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3053 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3054 ERR_R_INTERNAL_ERROR);
3055 goto err;
3056 }
3057 for (i=63,j=0; i>=0; j++, i--) {
3058 p[2+j]=signbuf[i];
3059 }
3060 s2n(j,p);
3061 n=j+2;
3062 }
3063 else
3064 {
3065 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3066 goto err;
3067 }
3068 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
3069 l2n3(n,d);
3070
3071 s->state=SSL3_ST_CW_CERT_VRFY_B;
3072 s->init_num=(int)n+4;
3073 s->init_off=0;
3074 }
3075 EVP_MD_CTX_cleanup(&mctx);
3076 EVP_PKEY_CTX_free(pctx);
3077 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3078err:
3079 EVP_MD_CTX_cleanup(&mctx);
3080 EVP_PKEY_CTX_free(pctx);
3081 return(-1);
3082 }
3083
3084int ssl3_send_client_certificate(SSL *s)
3085 {
3086 X509 *x509=NULL;
3087 EVP_PKEY *pkey=NULL;
3088 int i;
3089 unsigned long l;
3090
3091 if (s->state == SSL3_ST_CW_CERT_A)
3092 {
3093 if ((s->cert == NULL) ||
3094 (s->cert->key->x509 == NULL) ||
3095 (s->cert->key->privatekey == NULL))
3096 s->state=SSL3_ST_CW_CERT_B;
3097 else
3098 s->state=SSL3_ST_CW_CERT_C;
3099 }
3100
3101 /* We need to get a client cert */
3102 if (s->state == SSL3_ST_CW_CERT_B)
3103 {
3104 /* If we get an error, we need to
3105 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3106 * We then get retied later */
3107 i=0;
3108 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3109 if (i < 0)
3110 {
3111 s->rwstate=SSL_X509_LOOKUP;
3112 return(-1);
3113 }
3114 s->rwstate=SSL_NOTHING;
3115 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3116 {
3117 s->state=SSL3_ST_CW_CERT_B;
3118 if ( !SSL_use_certificate(s,x509) ||
3119 !SSL_use_PrivateKey(s,pkey))
3120 i=0;
3121 }
3122 else if (i == 1)
3123 {
3124 i=0;
3125 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3126 }
3127
3128 if (x509 != NULL) X509_free(x509);
3129 if (pkey != NULL) EVP_PKEY_free(pkey);
3130 if (i == 0)
3131 {
3132 if (s->version == SSL3_VERSION)
3133 {
3134 s->s3->tmp.cert_req=0;
3135 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3136 return(1);
3137 }
3138 else
3139 {
3140 s->s3->tmp.cert_req=2;
3141 }
3142 }
3143
3144 /* Ok, we have a cert */
3145 s->state=SSL3_ST_CW_CERT_C;
3146 }
3147
3148 if (s->state == SSL3_ST_CW_CERT_C)
3149 {
3150 s->state=SSL3_ST_CW_CERT_D;
3151 l=ssl3_output_cert_chain(s,
3152 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
3153 s->init_num=(int)l;
3154 s->init_off=0;
3155 }
3156 /* SSL3_ST_CW_CERT_D */
3157 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3158 }
3159
3160#define has_bits(i,m) (((i)&(m)) == (m))
3161
3162int ssl3_check_cert_and_algorithm(SSL *s)
3163 {
3164 int i,idx;
3165 long alg_k,alg_a;
3166 EVP_PKEY *pkey=NULL;
3167 SESS_CERT *sc;
3168#ifndef OPENSSL_NO_RSA
3169 RSA *rsa;
3170#endif
3171#ifndef OPENSSL_NO_DH
3172 DH *dh;
3173#endif
3174
3175 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3176 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3177
3178 /* we don't have a certificate */
3179 if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3180 return(1);
3181
3182 sc=s->session->sess_cert;
3183 if (sc == NULL)
3184 {
3185 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3186 goto err;
3187 }
3188
3189#ifndef OPENSSL_NO_RSA
3190 rsa=s->session->sess_cert->peer_rsa_tmp;
3191#endif
3192#ifndef OPENSSL_NO_DH
3193 dh=s->session->sess_cert->peer_dh_tmp;
3194#endif
3195
3196 /* This is the passed certificate */
3197
3198 idx=sc->peer_cert_type;
3199#ifndef OPENSSL_NO_ECDH
3200 if (idx == SSL_PKEY_ECC)
3201 {
3202 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3203 s) == 0)
3204 { /* check failed */
3205 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3206 goto f_err;
3207 }
3208 else
3209 {
3210 return 1;
3211 }
3212 }
3213#endif
3214 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3215 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3216 EVP_PKEY_free(pkey);
3217
3218
3219 /* Check that we have a certificate if we require one */
3220 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3221 {
3222 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3223 goto f_err;
3224 }
3225#ifndef OPENSSL_NO_DSA
3226 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3227 {
3228 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3229 goto f_err;
3230 }
3231#endif
3232#ifndef OPENSSL_NO_RSA
3233 if ((alg_k & SSL_kRSA) &&
3234 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3235 {
3236 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3237 goto f_err;
3238 }
3239#endif
3240#ifndef OPENSSL_NO_DH
3241 if ((alg_k & SSL_kEDH) &&
3242 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3243 {
3244 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3245 goto f_err;
3246 }
3247 else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3248 {
3249 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3250 goto f_err;
3251 }
3252#ifndef OPENSSL_NO_DSA
3253 else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3254 {
3255 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3256 goto f_err;
3257 }
3258#endif
3259#endif
3260
3261 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3262 {
3263#ifndef OPENSSL_NO_RSA
3264 if (alg_k & SSL_kRSA)
3265 {
3266 if (rsa == NULL
3267 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3268 {
3269 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3270 goto f_err;
3271 }
3272 }
3273 else
3274#endif
3275#ifndef OPENSSL_NO_DH
3276 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
3277 {
3278 if (dh == NULL
3279 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3280 {
3281 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3282 goto f_err;
3283 }
3284 }
3285 else
3286#endif
3287 {
3288 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3289 goto f_err;
3290 }
3291 }
3292 return(1);
3293f_err:
3294 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3295err:
3296 return(0);
3297 }
3298
3299#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
3300int ssl3_send_next_proto(SSL *s)
3301 {
3302 unsigned int len, padding_len;
3303 unsigned char *d;
3304
3305 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3306 {
3307 len = s->next_proto_negotiated_len;
3308 padding_len = 32 - ((len + 2) % 32);
3309 d = (unsigned char *)s->init_buf->data;
3310 d[4] = len;
3311 memcpy(d + 5, s->next_proto_negotiated, len);
3312 d[5 + len] = padding_len;
3313 memset(d + 6 + len, 0, padding_len);
3314 *(d++)=SSL3_MT_NEXT_PROTO;
3315 l2n3(2 + len + padding_len, d);
3316 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3317 s->init_num = 4 + 2 + len + padding_len;
3318 s->init_off = 0;
3319 }
3320
3321 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3322}
3323#endif /* !OPENSSL_NO_TLSEXT && !OPENSSL_NO_NEXTPROTONEG */
3324
3325/* Check to see if handshake is full or resumed. Usually this is just a
3326 * case of checking to see if a cache hit has occurred. In the case of
3327 * session tickets we have to check the next message to be sure.
3328 */
3329
3330#ifndef OPENSSL_NO_TLSEXT
3331int ssl3_check_finished(SSL *s)
3332 {
3333 int ok;
3334 long n;
3335 /* If we have no ticket it cannot be a resumed session. */
3336 if (!s->session->tlsext_tick)
3337 return 1;
3338 /* this function is called when we really expect a Certificate
3339 * message, so permit appropriate message length */
3340 n=s->method->ssl_get_message(s,
3341 SSL3_ST_CR_CERT_A,
3342 SSL3_ST_CR_CERT_B,
3343 -1,
3344 s->max_cert_list,
3345 &ok);
3346 if (!ok) return((int)n);
3347 s->s3->tmp.reuse_message = 1;
3348 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3349 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3350 return 2;
3351
3352 return 1;
3353 }
3354#endif
3355
3356int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3357 {
3358 int i = 0;
3359#ifndef OPENSSL_NO_ENGINE
3360 if (s->ctx->client_cert_engine)
3361 {
3362 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3363 SSL_get_client_CA_list(s),
3364 px509, ppkey, NULL, NULL, NULL);
3365 if (i != 0)
3366 return i;
3367 }
3368#endif
3369 if (s->ctx->client_cert_cb)
3370 i = s->ctx->client_cert_cb(s,px509,ppkey);
3371 return i;
3372 }
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2026-02-09 05:41:59 +0000