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[thirdparty/openssl.git] / ssl / s3_clnt.c
1 /* ssl/s3_clnt.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58 /* ====================================================================
59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 *
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
71 * distribution.
72 *
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 *
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
82 *
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 * acknowledgment:
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
105 *
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
109 *
110 */
111 /* ====================================================================
112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113 *
114 * Portions of the attached software ("Contribution") are developed by
115 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
116 *
117 * The Contribution is licensed pursuant to the OpenSSL open source
118 * license provided above.
119 *
120 * ECC cipher suite support in OpenSSL originally written by
121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
122 *
123 */
124 /* ====================================================================
125 * Copyright 2005 Nokia. All rights reserved.
126 *
127 * The portions of the attached software ("Contribution") is developed by
128 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
129 * license.
130 *
131 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
132 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
133 * support (see RFC 4279) to OpenSSL.
134 *
135 * No patent licenses or other rights except those expressly stated in
136 * the OpenSSL open source license shall be deemed granted or received
137 * expressly, by implication, estoppel, or otherwise.
138 *
139 * No assurances are provided by Nokia that the Contribution does not
140 * infringe the patent or other intellectual property rights of any third
141 * party or that the license provides you with all the necessary rights
142 * to make use of the Contribution.
143 *
144 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
145 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
146 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
147 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
148 * OTHERWISE.
149 */
150
151 #include <stdio.h>
152 #include "ssl_locl.h"
153 #include "kssl_lcl.h"
154 #include <openssl/buffer.h>
155 #include <openssl/rand.h>
156 #include <openssl/objects.h>
157 #include <openssl/evp.h>
158 #include <openssl/md5.h>
159 #ifndef OPENSSL_NO_DH
160 #include <openssl/dh.h>
161 #endif
162 #include <openssl/bn.h>
163
164 static const SSL_METHOD *ssl3_get_client_method(int ver);
165 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
166 #ifndef OPENSSL_NO_TLSEXT
167 static int ssl3_check_finished(SSL *s);
168 #endif
169
170 static const SSL_METHOD *ssl3_get_client_method(int ver)
171 {
172 if (ver == SSL3_VERSION)
173 return(SSLv3_client_method());
174 else
175 return(NULL);
176 }
177
178 IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
179 ssl_undefined_function,
180 ssl3_connect,
181 ssl3_get_client_method)
182
183 int ssl3_connect(SSL *s)
184 {
185 BUF_MEM *buf=NULL;
186 unsigned long Time=(unsigned long)time(NULL);
187 long num1;
188 void (*cb)(const SSL *ssl,int type,int val)=NULL;
189 int ret= -1;
190 int new_state,state,skip=0;;
191
192 RAND_add(&Time,sizeof(Time),0);
193 ERR_clear_error();
194 clear_sys_error();
195
196 if (s->info_callback != NULL)
197 cb=s->info_callback;
198 else if (s->ctx->info_callback != NULL)
199 cb=s->ctx->info_callback;
200
201 s->in_handshake++;
202 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
203
204 for (;;)
205 {
206 state=s->state;
207
208 switch(s->state)
209 {
210 case SSL_ST_RENEGOTIATE:
211 s->new_session=1;
212 s->state=SSL_ST_CONNECT;
213 s->ctx->stats.sess_connect_renegotiate++;
214 /* break */
215 case SSL_ST_BEFORE:
216 case SSL_ST_CONNECT:
217 case SSL_ST_BEFORE|SSL_ST_CONNECT:
218 case SSL_ST_OK|SSL_ST_CONNECT:
219
220 s->server=0;
221 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
222
223 if ((s->version & 0xff00 ) != 0x0300)
224 {
225 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
226 ret = -1;
227 goto end;
228 }
229
230 /* s->version=SSL3_VERSION; */
231 s->type=SSL_ST_CONNECT;
232
233 if (s->init_buf == NULL)
234 {
235 if ((buf=BUF_MEM_new()) == NULL)
236 {
237 ret= -1;
238 goto end;
239 }
240 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
241 {
242 ret= -1;
243 goto end;
244 }
245 s->init_buf=buf;
246 buf=NULL;
247 }
248
249 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
250
251 /* setup buffing BIO */
252 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
253
254 /* don't push the buffering BIO quite yet */
255
256 ssl3_init_finished_mac(s);
257
258 s->state=SSL3_ST_CW_CLNT_HELLO_A;
259 s->ctx->stats.sess_connect++;
260 s->init_num=0;
261 break;
262
263 case SSL3_ST_CW_CLNT_HELLO_A:
264 case SSL3_ST_CW_CLNT_HELLO_B:
265
266 s->shutdown=0;
267 ret=ssl3_client_hello(s);
268 if (ret <= 0) goto end;
269 s->state=SSL3_ST_CR_SRVR_HELLO_A;
270 s->init_num=0;
271
272 /* turn on buffering for the next lot of output */
273 if (s->bbio != s->wbio)
274 s->wbio=BIO_push(s->bbio,s->wbio);
275
276 break;
277
278 case SSL3_ST_CR_SRVR_HELLO_A:
279 case SSL3_ST_CR_SRVR_HELLO_B:
280 ret=ssl3_get_server_hello(s);
281 if (ret <= 0) goto end;
282
283 if (s->hit)
284 s->state=SSL3_ST_CR_FINISHED_A;
285 else
286 s->state=SSL3_ST_CR_CERT_A;
287 s->init_num=0;
288 break;
289
290 case SSL3_ST_CR_CERT_A:
291 case SSL3_ST_CR_CERT_B:
292 #ifndef OPENSSL_NO_TLSEXT
293 ret=ssl3_check_finished(s);
294 if (ret <= 0) goto end;
295 if (ret == 2)
296 {
297 s->hit = 1;
298 s->state=SSL3_ST_CR_FINISHED_A;
299 s->init_num=0;
300 break;
301 }
302 #endif
303 /* Check if it is anon DH/ECDH */
304 /* or PSK */
305 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
306 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
307 {
308 ret=ssl3_get_server_certificate(s);
309 if (ret <= 0) goto end;
310 }
311 else
312 skip=1;
313 s->state=SSL3_ST_CR_KEY_EXCH_A;
314 s->init_num=0;
315 break;
316
317 case SSL3_ST_CR_KEY_EXCH_A:
318 case SSL3_ST_CR_KEY_EXCH_B:
319 ret=ssl3_get_key_exchange(s);
320 if (ret <= 0) goto end;
321 s->state=SSL3_ST_CR_CERT_REQ_A;
322 s->init_num=0;
323
324 /* at this point we check that we have the
325 * required stuff from the server */
326 if (!ssl3_check_cert_and_algorithm(s))
327 {
328 ret= -1;
329 goto end;
330 }
331 break;
332
333 case SSL3_ST_CR_CERT_REQ_A:
334 case SSL3_ST_CR_CERT_REQ_B:
335 ret=ssl3_get_certificate_request(s);
336 if (ret <= 0) goto end;
337 s->state=SSL3_ST_CR_SRVR_DONE_A;
338 s->init_num=0;
339 break;
340
341 case SSL3_ST_CR_SRVR_DONE_A:
342 case SSL3_ST_CR_SRVR_DONE_B:
343 ret=ssl3_get_server_done(s);
344 if (ret <= 0) goto end;
345 if (s->s3->tmp.cert_req)
346 s->state=SSL3_ST_CW_CERT_A;
347 else
348 s->state=SSL3_ST_CW_KEY_EXCH_A;
349 s->init_num=0;
350
351 break;
352
353 case SSL3_ST_CW_CERT_A:
354 case SSL3_ST_CW_CERT_B:
355 case SSL3_ST_CW_CERT_C:
356 case SSL3_ST_CW_CERT_D:
357 ret=ssl3_send_client_certificate(s);
358 if (ret <= 0) goto end;
359 s->state=SSL3_ST_CW_KEY_EXCH_A;
360 s->init_num=0;
361 break;
362
363 case SSL3_ST_CW_KEY_EXCH_A:
364 case SSL3_ST_CW_KEY_EXCH_B:
365 ret=ssl3_send_client_key_exchange(s);
366 if (ret <= 0) goto end;
367 /* EAY EAY EAY need to check for DH fix cert
368 * sent back */
369 /* For TLS, cert_req is set to 2, so a cert chain
370 * of nothing is sent, but no verify packet is sent */
371 /* XXX: For now, we do not support client
372 * authentication in ECDH cipher suites with
373 * ECDH (rather than ECDSA) certificates.
374 * We need to skip the certificate verify
375 * message when client's ECDH public key is sent
376 * inside the client certificate.
377 */
378 if (s->s3->tmp.cert_req == 1)
379 {
380 s->state=SSL3_ST_CW_CERT_VRFY_A;
381 }
382 else
383 {
384 s->state=SSL3_ST_CW_CHANGE_A;
385 s->s3->change_cipher_spec=0;
386 }
387
388 s->init_num=0;
389 break;
390
391 case SSL3_ST_CW_CERT_VRFY_A:
392 case SSL3_ST_CW_CERT_VRFY_B:
393 ret=ssl3_send_client_verify(s);
394 if (ret <= 0) goto end;
395 s->state=SSL3_ST_CW_CHANGE_A;
396 s->init_num=0;
397 s->s3->change_cipher_spec=0;
398 break;
399
400 case SSL3_ST_CW_CHANGE_A:
401 case SSL3_ST_CW_CHANGE_B:
402 ret=ssl3_send_change_cipher_spec(s,
403 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
404 if (ret <= 0) goto end;
405 s->state=SSL3_ST_CW_FINISHED_A;
406 s->init_num=0;
407
408 s->session->cipher=s->s3->tmp.new_cipher;
409 #ifdef OPENSSL_NO_COMP
410 s->session->compress_meth=0;
411 #else
412 if (s->s3->tmp.new_compression == NULL)
413 s->session->compress_meth=0;
414 else
415 s->session->compress_meth=
416 s->s3->tmp.new_compression->id;
417 #endif
418 if (!s->method->ssl3_enc->setup_key_block(s))
419 {
420 ret= -1;
421 goto end;
422 }
423
424 if (!s->method->ssl3_enc->change_cipher_state(s,
425 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
426 {
427 ret= -1;
428 goto end;
429 }
430
431 break;
432
433 case SSL3_ST_CW_FINISHED_A:
434 case SSL3_ST_CW_FINISHED_B:
435 ret=ssl3_send_finished(s,
436 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
437 s->method->ssl3_enc->client_finished_label,
438 s->method->ssl3_enc->client_finished_label_len);
439 if (ret <= 0) goto end;
440 s->state=SSL3_ST_CW_FLUSH;
441
442 /* clear flags */
443 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
444 if (s->hit)
445 {
446 s->s3->tmp.next_state=SSL_ST_OK;
447 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
448 {
449 s->state=SSL_ST_OK;
450 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
451 s->s3->delay_buf_pop_ret=0;
452 }
453 }
454 else
455 {
456 #ifndef OPENSSL_NO_TLSEXT
457 /* Allow NewSessionTicket if ticket expected */
458 if (s->tlsext_ticket_expected)
459 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
460 else
461 #endif
462
463 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
464 }
465 s->init_num=0;
466 break;
467
468 #ifndef OPENSSL_NO_TLSEXT
469 case SSL3_ST_CR_SESSION_TICKET_A:
470 case SSL3_ST_CR_SESSION_TICKET_B:
471 ret=ssl3_get_new_session_ticket(s);
472 if (ret <= 0) goto end;
473 s->state=SSL3_ST_CR_FINISHED_A;
474 s->init_num=0;
475 break;
476 #endif
477
478 case SSL3_ST_CR_FINISHED_A:
479 case SSL3_ST_CR_FINISHED_B:
480
481 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
482 SSL3_ST_CR_FINISHED_B);
483 if (ret <= 0) goto end;
484
485 if (s->hit)
486 s->state=SSL3_ST_CW_CHANGE_A;
487 else
488 s->state=SSL_ST_OK;
489 s->init_num=0;
490 break;
491
492 case SSL3_ST_CW_FLUSH:
493 /* number of bytes to be flushed */
494 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
495 if (num1 > 0)
496 {
497 s->rwstate=SSL_WRITING;
498 num1=BIO_flush(s->wbio);
499 if (num1 <= 0) { ret= -1; goto end; }
500 s->rwstate=SSL_NOTHING;
501 }
502
503 s->state=s->s3->tmp.next_state;
504 break;
505
506 case SSL_ST_OK:
507 /* clean a few things up */
508 ssl3_cleanup_key_block(s);
509
510 if (s->init_buf != NULL)
511 {
512 BUF_MEM_free(s->init_buf);
513 s->init_buf=NULL;
514 }
515
516 /* If we are not 'joining' the last two packets,
517 * remove the buffering now */
518 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
519 ssl_free_wbio_buffer(s);
520 /* else do it later in ssl3_write */
521
522 s->init_num=0;
523 s->new_session=0;
524
525 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
526 if (s->hit) s->ctx->stats.sess_hit++;
527
528 ret=1;
529 /* s->server=0; */
530 s->handshake_func=ssl3_connect;
531 s->ctx->stats.sess_connect_good++;
532
533 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
534
535 goto end;
536 /* break; */
537
538 default:
539 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
540 ret= -1;
541 goto end;
542 /* break; */
543 }
544
545 /* did we do anything */
546 if (!s->s3->tmp.reuse_message && !skip)
547 {
548 if (s->debug)
549 {
550 if ((ret=BIO_flush(s->wbio)) <= 0)
551 goto end;
552 }
553
554 if ((cb != NULL) && (s->state != state))
555 {
556 new_state=s->state;
557 s->state=state;
558 cb(s,SSL_CB_CONNECT_LOOP,1);
559 s->state=new_state;
560 }
561 }
562 skip=0;
563 }
564 end:
565 s->in_handshake--;
566 if (buf != NULL)
567 BUF_MEM_free(buf);
568 if (cb != NULL)
569 cb(s,SSL_CB_CONNECT_EXIT,ret);
570 return(ret);
571 }
572
573
574 int ssl3_client_hello(SSL *s)
575 {
576 unsigned char *buf;
577 unsigned char *p,*d;
578 int i;
579 unsigned long Time,l;
580 #ifndef OPENSSL_NO_COMP
581 int j;
582 SSL_COMP *comp;
583 #endif
584
585 buf=(unsigned char *)s->init_buf->data;
586 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
587 {
588 if ((s->session == NULL) ||
589 (s->session->ssl_version != s->version) ||
590 (s->session->not_resumable))
591 {
592 if (!ssl_get_new_session(s,0))
593 goto err;
594 }
595 /* else use the pre-loaded session */
596
597 p=s->s3->client_random;
598 Time=(unsigned long)time(NULL); /* Time */
599 l2n(Time,p);
600 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
601 goto err;
602
603 /* Do the message type and length last */
604 d=p= &(buf[4]);
605
606 *(p++)=s->version>>8;
607 *(p++)=s->version&0xff;
608 s->client_version=s->version;
609
610 /* Random stuff */
611 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
612 p+=SSL3_RANDOM_SIZE;
613
614 /* Session ID */
615 if (s->new_session)
616 i=0;
617 else
618 i=s->session->session_id_length;
619 *(p++)=i;
620 if (i != 0)
621 {
622 if (i > (int)sizeof(s->session->session_id))
623 {
624 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
625 goto err;
626 }
627 memcpy(p,s->session->session_id,i);
628 p+=i;
629 }
630
631 /* Ciphers supported */
632 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
633 if (i == 0)
634 {
635 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
636 goto err;
637 }
638 s2n(i,p);
639 p+=i;
640
641 /* COMPRESSION */
642 #ifdef OPENSSL_NO_COMP
643 *(p++)=1;
644 #else
645
646 if ((s->options & SSL_OP_NO_COMPRESSION)
647 || !s->ctx->comp_methods)
648 j=0;
649 else
650 j=sk_SSL_COMP_num(s->ctx->comp_methods);
651 *(p++)=1+j;
652 for (i=0; i<j; i++)
653 {
654 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
655 *(p++)=comp->id;
656 }
657 #endif
658 *(p++)=0; /* Add the NULL method */
659
660 #ifndef OPENSSL_NO_TLSEXT
661 /* TLS extensions*/
662 if (ssl_prepare_clienthello_tlsext(s) <= 0)
663 {
664 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
665 goto err;
666 }
667 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
668 {
669 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
670 goto err;
671 }
672 #endif
673
674 l=(p-d);
675 d=buf;
676 *(d++)=SSL3_MT_CLIENT_HELLO;
677 l2n3(l,d);
678
679 s->state=SSL3_ST_CW_CLNT_HELLO_B;
680 /* number of bytes to write */
681 s->init_num=p-buf;
682 s->init_off=0;
683 }
684
685 /* SSL3_ST_CW_CLNT_HELLO_B */
686 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
687 err:
688 return(-1);
689 }
690
691 int ssl3_get_server_hello(SSL *s)
692 {
693 STACK_OF(SSL_CIPHER) *sk;
694 SSL_CIPHER *c;
695 unsigned char *p,*d;
696 int i,al,ok;
697 unsigned int j;
698 long n;
699 #ifndef OPENSSL_NO_COMP
700 SSL_COMP *comp;
701 #endif
702
703 n=s->method->ssl_get_message(s,
704 SSL3_ST_CR_SRVR_HELLO_A,
705 SSL3_ST_CR_SRVR_HELLO_B,
706 -1,
707 20000, /* ?? */
708 &ok);
709
710 if (!ok) return((int)n);
711
712 if ( SSL_version(s) == DTLS1_VERSION)
713 {
714 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
715 {
716 if ( s->d1->send_cookie == 0)
717 {
718 s->s3->tmp.reuse_message = 1;
719 return 1;
720 }
721 else /* already sent a cookie */
722 {
723 al=SSL_AD_UNEXPECTED_MESSAGE;
724 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
725 goto f_err;
726 }
727 }
728 }
729
730 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
731 {
732 al=SSL_AD_UNEXPECTED_MESSAGE;
733 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
734 goto f_err;
735 }
736
737 d=p=(unsigned char *)s->init_msg;
738
739 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
740 {
741 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
742 s->version=(s->version&0xff00)|p[1];
743 al=SSL_AD_PROTOCOL_VERSION;
744 goto f_err;
745 }
746 p+=2;
747
748 /* load the server hello data */
749 /* load the server random */
750 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
751 p+=SSL3_RANDOM_SIZE;
752
753 /* get the session-id */
754 j= *(p++);
755
756 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
757 {
758 al=SSL_AD_ILLEGAL_PARAMETER;
759 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
760 goto f_err;
761 }
762
763 if (j != 0 && j == s->session->session_id_length
764 && memcmp(p,s->session->session_id,j) == 0)
765 {
766 if(s->sid_ctx_length != s->session->sid_ctx_length
767 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
768 {
769 /* actually a client application bug */
770 al=SSL_AD_ILLEGAL_PARAMETER;
771 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
772 goto f_err;
773 }
774 s->hit=1;
775 }
776 else /* a miss or crap from the other end */
777 {
778 /* If we were trying for session-id reuse, make a new
779 * SSL_SESSION so we don't stuff up other people */
780 s->hit=0;
781 if (s->session->session_id_length > 0)
782 {
783 if (!ssl_get_new_session(s,0))
784 {
785 al=SSL_AD_INTERNAL_ERROR;
786 goto f_err;
787 }
788 }
789 s->session->session_id_length=j;
790 memcpy(s->session->session_id,p,j); /* j could be 0 */
791 }
792 p+=j;
793 c=ssl_get_cipher_by_char(s,p);
794 if (c == NULL)
795 {
796 /* unknown cipher */
797 al=SSL_AD_ILLEGAL_PARAMETER;
798 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
799 goto f_err;
800 }
801 p+=ssl_put_cipher_by_char(s,NULL,NULL);
802
803 sk=ssl_get_ciphers_by_id(s);
804 i=sk_SSL_CIPHER_find(sk,c);
805 if (i < 0)
806 {
807 /* we did not say we would use this cipher */
808 al=SSL_AD_ILLEGAL_PARAMETER;
809 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
810 goto f_err;
811 }
812
813 /* Depending on the session caching (internal/external), the cipher
814 and/or cipher_id values may not be set. Make sure that
815 cipher_id is set and use it for comparison. */
816 if (s->session->cipher)
817 s->session->cipher_id = s->session->cipher->id;
818 if (s->hit && (s->session->cipher_id != c->id))
819 {
820 if (!(s->options &
821 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
822 {
823 al=SSL_AD_ILLEGAL_PARAMETER;
824 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
825 goto f_err;
826 }
827 }
828 s->s3->tmp.new_cipher=c;
829 ssl3_digest_cached_records(s);
830
831 /* lets get the compression algorithm */
832 /* COMPRESSION */
833 #ifdef OPENSSL_NO_COMP
834 if (*(p++) != 0)
835 {
836 al=SSL_AD_ILLEGAL_PARAMETER;
837 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
838 goto f_err;
839 }
840 #else
841 j= *(p++);
842 if ((j == 0) || (s->options & SSL_OP_NO_COMPRESSION))
843 comp=NULL;
844 else
845 comp=ssl3_comp_find(s->ctx->comp_methods,j);
846
847 if ((j != 0) && (comp == NULL))
848 {
849 al=SSL_AD_ILLEGAL_PARAMETER;
850 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
851 goto f_err;
852 }
853 else
854 {
855 s->s3->tmp.new_compression=comp;
856 }
857 #endif
858
859 #ifndef OPENSSL_NO_TLSEXT
860 /* TLS extensions*/
861 if (s->version > SSL3_VERSION)
862 {
863 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al))
864 {
865 /* 'al' set by ssl_parse_serverhello_tlsext */
866 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
867 goto f_err;
868 }
869 if (ssl_check_serverhello_tlsext(s) <= 0)
870 {
871 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT);
872 goto err;
873 }
874 }
875 #endif
876
877 if (p != (d+n))
878 {
879 /* wrong packet length */
880 al=SSL_AD_DECODE_ERROR;
881 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
882 goto err;
883 }
884
885 return(1);
886 f_err:
887 ssl3_send_alert(s,SSL3_AL_FATAL,al);
888 err:
889 return(-1);
890 }
891
892 int ssl3_get_server_certificate(SSL *s)
893 {
894 int al,i,ok,ret= -1;
895 unsigned long n,nc,llen,l;
896 X509 *x=NULL;
897 const unsigned char *q,*p;
898 unsigned char *d;
899 STACK_OF(X509) *sk=NULL;
900 SESS_CERT *sc;
901 EVP_PKEY *pkey=NULL;
902 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
903
904 n=s->method->ssl_get_message(s,
905 SSL3_ST_CR_CERT_A,
906 SSL3_ST_CR_CERT_B,
907 -1,
908 s->max_cert_list,
909 &ok);
910
911 if (!ok) return((int)n);
912
913 if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE)
914 {
915 s->s3->tmp.reuse_message=1;
916 return(1);
917 }
918
919 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
920 {
921 al=SSL_AD_UNEXPECTED_MESSAGE;
922 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
923 goto f_err;
924 }
925 p=d=(unsigned char *)s->init_msg;
926
927 if ((sk=sk_X509_new_null()) == NULL)
928 {
929 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
930 goto err;
931 }
932
933 n2l3(p,llen);
934 if (llen+3 != n)
935 {
936 al=SSL_AD_DECODE_ERROR;
937 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
938 goto f_err;
939 }
940 for (nc=0; nc<llen; )
941 {
942 n2l3(p,l);
943 if ((l+nc+3) > llen)
944 {
945 al=SSL_AD_DECODE_ERROR;
946 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
947 goto f_err;
948 }
949
950 q=p;
951 x=d2i_X509(NULL,&q,l);
952 if (x == NULL)
953 {
954 al=SSL_AD_BAD_CERTIFICATE;
955 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
956 goto f_err;
957 }
958 if (q != (p+l))
959 {
960 al=SSL_AD_DECODE_ERROR;
961 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
962 goto f_err;
963 }
964 if (!sk_X509_push(sk,x))
965 {
966 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
967 goto err;
968 }
969 x=NULL;
970 nc+=l+3;
971 p=q;
972 }
973
974 i=ssl_verify_cert_chain(s,sk);
975 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i)
976 #ifndef OPENSSL_NO_KRB5
977 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
978 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
979 #endif /* OPENSSL_NO_KRB5 */
980 )
981 {
982 al=ssl_verify_alarm_type(s->verify_result);
983 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
984 goto f_err;
985 }
986 ERR_clear_error(); /* but we keep s->verify_result */
987
988 sc=ssl_sess_cert_new();
989 if (sc == NULL) goto err;
990
991 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
992 s->session->sess_cert=sc;
993
994 sc->cert_chain=sk;
995 /* Inconsistency alert: cert_chain does include the peer's
996 * certificate, which we don't include in s3_srvr.c */
997 x=sk_X509_value(sk,0);
998 sk=NULL;
999 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1000
1001 pkey=X509_get_pubkey(x);
1002
1003 /* VRS: allow null cert if auth == KRB5 */
1004 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1005 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1006 ? 0 : 1;
1007
1008 #ifdef KSSL_DEBUG
1009 printf("pkey,x = %p, %p\n", pkey,x);
1010 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1011 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1012 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1013 #endif /* KSSL_DEBUG */
1014
1015 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1016 {
1017 x=NULL;
1018 al=SSL3_AL_FATAL;
1019 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1020 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1021 goto f_err;
1022 }
1023
1024 i=ssl_cert_type(x,pkey);
1025 if (need_cert && i < 0)
1026 {
1027 x=NULL;
1028 al=SSL3_AL_FATAL;
1029 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1030 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1031 goto f_err;
1032 }
1033
1034 if (need_cert)
1035 {
1036 sc->peer_cert_type=i;
1037 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1038 /* Why would the following ever happen?
1039 * We just created sc a couple of lines ago. */
1040 if (sc->peer_pkeys[i].x509 != NULL)
1041 X509_free(sc->peer_pkeys[i].x509);
1042 sc->peer_pkeys[i].x509=x;
1043 sc->peer_key= &(sc->peer_pkeys[i]);
1044
1045 if (s->session->peer != NULL)
1046 X509_free(s->session->peer);
1047 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1048 s->session->peer=x;
1049 }
1050 else
1051 {
1052 sc->peer_cert_type=i;
1053 sc->peer_key= NULL;
1054
1055 if (s->session->peer != NULL)
1056 X509_free(s->session->peer);
1057 s->session->peer=NULL;
1058 }
1059 s->session->verify_result = s->verify_result;
1060
1061 x=NULL;
1062 ret=1;
1063
1064 if (0)
1065 {
1066 f_err:
1067 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1068 }
1069 err:
1070 EVP_PKEY_free(pkey);
1071 X509_free(x);
1072 sk_X509_pop_free(sk,X509_free);
1073 return(ret);
1074 }
1075
1076 int ssl3_get_key_exchange(SSL *s)
1077 {
1078 #ifndef OPENSSL_NO_RSA
1079 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1080 #endif
1081 EVP_MD_CTX md_ctx;
1082 unsigned char *param,*p;
1083 int al,i,j,param_len,ok;
1084 long n,alg_k,alg_a;
1085 EVP_PKEY *pkey=NULL;
1086 #ifndef OPENSSL_NO_RSA
1087 RSA *rsa=NULL;
1088 #endif
1089 #ifndef OPENSSL_NO_DH
1090 DH *dh=NULL;
1091 #endif
1092 #ifndef OPENSSL_NO_ECDH
1093 EC_KEY *ecdh = NULL;
1094 BN_CTX *bn_ctx = NULL;
1095 EC_POINT *srvr_ecpoint = NULL;
1096 int curve_nid = 0;
1097 int encoded_pt_len = 0;
1098 #endif
1099
1100 /* use same message size as in ssl3_get_certificate_request()
1101 * as ServerKeyExchange message may be skipped */
1102 n=s->method->ssl_get_message(s,
1103 SSL3_ST_CR_KEY_EXCH_A,
1104 SSL3_ST_CR_KEY_EXCH_B,
1105 -1,
1106 s->max_cert_list,
1107 &ok);
1108 if (!ok) return((int)n);
1109
1110 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1111 {
1112 #ifndef OPENSSL_NO_PSK
1113 /* In plain PSK ciphersuite, ServerKeyExchange can be
1114 omitted if no identity hint is sent. Set
1115 session->sess_cert anyway to avoid problems
1116 later.*/
1117 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1118 {
1119 s->session->sess_cert=ssl_sess_cert_new();
1120 if (s->ctx->psk_identity_hint)
1121 OPENSSL_free(s->ctx->psk_identity_hint);
1122 s->ctx->psk_identity_hint = NULL;
1123 }
1124 #endif
1125 s->s3->tmp.reuse_message=1;
1126 return(1);
1127 }
1128
1129 param=p=(unsigned char *)s->init_msg;
1130 if (s->session->sess_cert != NULL)
1131 {
1132 #ifndef OPENSSL_NO_RSA
1133 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1134 {
1135 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1136 s->session->sess_cert->peer_rsa_tmp=NULL;
1137 }
1138 #endif
1139 #ifndef OPENSSL_NO_DH
1140 if (s->session->sess_cert->peer_dh_tmp)
1141 {
1142 DH_free(s->session->sess_cert->peer_dh_tmp);
1143 s->session->sess_cert->peer_dh_tmp=NULL;
1144 }
1145 #endif
1146 #ifndef OPENSSL_NO_ECDH
1147 if (s->session->sess_cert->peer_ecdh_tmp)
1148 {
1149 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1150 s->session->sess_cert->peer_ecdh_tmp=NULL;
1151 }
1152 #endif
1153 }
1154 else
1155 {
1156 s->session->sess_cert=ssl_sess_cert_new();
1157 }
1158
1159 param_len=0;
1160 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1161 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1162 EVP_MD_CTX_init(&md_ctx);
1163
1164 #ifndef OPENSSL_NO_PSK
1165 if (alg_k & SSL_kPSK)
1166 {
1167 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1168
1169 al=SSL_AD_HANDSHAKE_FAILURE;
1170 n2s(p,i);
1171 param_len=i+2;
1172 /* Store PSK identity hint for later use, hint is used
1173 * in ssl3_send_client_key_exchange. Assume that the
1174 * maximum length of a PSK identity hint can be as
1175 * long as the maximum length of a PSK identity. */
1176 if (i > PSK_MAX_IDENTITY_LEN)
1177 {
1178 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1179 SSL_R_DATA_LENGTH_TOO_LONG);
1180 goto f_err;
1181 }
1182 if (param_len > n)
1183 {
1184 al=SSL_AD_DECODE_ERROR;
1185 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1186 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1187 goto f_err;
1188 }
1189 /* If received PSK identity hint contains NULL
1190 * characters, the hint is truncated from the first
1191 * NULL. p may not be ending with NULL, so create a
1192 * NULL-terminated string. */
1193 memcpy(tmp_id_hint, p, i);
1194 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1195 if (s->ctx->psk_identity_hint != NULL)
1196 OPENSSL_free(s->ctx->psk_identity_hint);
1197 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1198 if (s->ctx->psk_identity_hint == NULL)
1199 {
1200 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1201 goto f_err;
1202 }
1203
1204 p+=i;
1205 n-=param_len;
1206 }
1207 else
1208 #endif /* !OPENSSL_NO_PSK */
1209 #ifndef OPENSSL_NO_RSA
1210 if (alg_k & SSL_kRSA)
1211 {
1212 if ((rsa=RSA_new()) == NULL)
1213 {
1214 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1215 goto err;
1216 }
1217 n2s(p,i);
1218 param_len=i+2;
1219 if (param_len > n)
1220 {
1221 al=SSL_AD_DECODE_ERROR;
1222 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1223 goto f_err;
1224 }
1225 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1226 {
1227 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1228 goto err;
1229 }
1230 p+=i;
1231
1232 n2s(p,i);
1233 param_len+=i+2;
1234 if (param_len > n)
1235 {
1236 al=SSL_AD_DECODE_ERROR;
1237 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1238 goto f_err;
1239 }
1240 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1241 {
1242 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1243 goto err;
1244 }
1245 p+=i;
1246 n-=param_len;
1247
1248 /* this should be because we are using an export cipher */
1249 if (alg_a & SSL_aRSA)
1250 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1251 else
1252 {
1253 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1254 goto err;
1255 }
1256 s->session->sess_cert->peer_rsa_tmp=rsa;
1257 rsa=NULL;
1258 }
1259 #else /* OPENSSL_NO_RSA */
1260 if (0)
1261 ;
1262 #endif
1263 #ifndef OPENSSL_NO_DH
1264 else if (alg_k & SSL_kEDH)
1265 {
1266 if ((dh=DH_new()) == NULL)
1267 {
1268 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1269 goto err;
1270 }
1271 n2s(p,i);
1272 param_len=i+2;
1273 if (param_len > n)
1274 {
1275 al=SSL_AD_DECODE_ERROR;
1276 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1277 goto f_err;
1278 }
1279 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1280 {
1281 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1282 goto err;
1283 }
1284 p+=i;
1285
1286 n2s(p,i);
1287 param_len+=i+2;
1288 if (param_len > n)
1289 {
1290 al=SSL_AD_DECODE_ERROR;
1291 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1292 goto f_err;
1293 }
1294 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1295 {
1296 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1297 goto err;
1298 }
1299 p+=i;
1300
1301 n2s(p,i);
1302 param_len+=i+2;
1303 if (param_len > n)
1304 {
1305 al=SSL_AD_DECODE_ERROR;
1306 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1307 goto f_err;
1308 }
1309 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1310 {
1311 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1312 goto err;
1313 }
1314 p+=i;
1315 n-=param_len;
1316
1317 #ifndef OPENSSL_NO_RSA
1318 if (alg_a & SSL_aRSA)
1319 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1320 #else
1321 if (0)
1322 ;
1323 #endif
1324 #ifndef OPENSSL_NO_DSA
1325 else if (alg_a & SSL_aDSS)
1326 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1327 #endif
1328 /* else anonymous DH, so no certificate or pkey. */
1329
1330 s->session->sess_cert->peer_dh_tmp=dh;
1331 dh=NULL;
1332 }
1333 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1334 {
1335 al=SSL_AD_ILLEGAL_PARAMETER;
1336 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1337 goto f_err;
1338 }
1339 #endif /* !OPENSSL_NO_DH */
1340
1341 #ifndef OPENSSL_NO_ECDH
1342 else if (alg_k & SSL_kEECDH)
1343 {
1344 EC_GROUP *ngroup;
1345 const EC_GROUP *group;
1346
1347 if ((ecdh=EC_KEY_new()) == NULL)
1348 {
1349 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1350 goto err;
1351 }
1352
1353 /* Extract elliptic curve parameters and the
1354 * server's ephemeral ECDH public key.
1355 * Keep accumulating lengths of various components in
1356 * param_len and make sure it never exceeds n.
1357 */
1358
1359 /* XXX: For now we only support named (not generic) curves
1360 * and the ECParameters in this case is just three bytes.
1361 */
1362 param_len=3;
1363 if ((param_len > n) ||
1364 (*p != NAMED_CURVE_TYPE) ||
1365 ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0))
1366 {
1367 al=SSL_AD_INTERNAL_ERROR;
1368 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1369 goto f_err;
1370 }
1371
1372 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1373 if (ngroup == NULL)
1374 {
1375 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1376 goto err;
1377 }
1378 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1379 {
1380 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1381 goto err;
1382 }
1383 EC_GROUP_free(ngroup);
1384
1385 group = EC_KEY_get0_group(ecdh);
1386
1387 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1388 (EC_GROUP_get_degree(group) > 163))
1389 {
1390 al=SSL_AD_EXPORT_RESTRICTION;
1391 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1392 goto f_err;
1393 }
1394
1395 p+=3;
1396
1397 /* Next, get the encoded ECPoint */
1398 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1399 ((bn_ctx = BN_CTX_new()) == NULL))
1400 {
1401 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1402 goto err;
1403 }
1404
1405 encoded_pt_len = *p; /* length of encoded point */
1406 p+=1;
1407 param_len += (1 + encoded_pt_len);
1408 if ((param_len > n) ||
1409 (EC_POINT_oct2point(group, srvr_ecpoint,
1410 p, encoded_pt_len, bn_ctx) == 0))
1411 {
1412 al=SSL_AD_DECODE_ERROR;
1413 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1414 goto f_err;
1415 }
1416
1417 n-=param_len;
1418 p+=encoded_pt_len;
1419
1420 /* The ECC/TLS specification does not mention
1421 * the use of DSA to sign ECParameters in the server
1422 * key exchange message. We do support RSA and ECDSA.
1423 */
1424 if (0) ;
1425 #ifndef OPENSSL_NO_RSA
1426 else if (alg_a & SSL_aRSA)
1427 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1428 #endif
1429 #ifndef OPENSSL_NO_ECDSA
1430 else if (alg_a & SSL_aECDSA)
1431 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1432 #endif
1433 /* else anonymous ECDH, so no certificate or pkey. */
1434 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1435 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1436 ecdh=NULL;
1437 BN_CTX_free(bn_ctx);
1438 EC_POINT_free(srvr_ecpoint);
1439 srvr_ecpoint = NULL;
1440 }
1441 else if (alg_k)
1442 {
1443 al=SSL_AD_UNEXPECTED_MESSAGE;
1444 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1445 goto f_err;
1446 }
1447 #endif /* !OPENSSL_NO_ECDH */
1448
1449
1450 /* p points to the next byte, there are 'n' bytes left */
1451
1452 /* if it was signed, check the signature */
1453 if (pkey != NULL)
1454 {
1455 n2s(p,i);
1456 n-=2;
1457 j=EVP_PKEY_size(pkey);
1458
1459 if ((i != n) || (n > j) || (n <= 0))
1460 {
1461 /* wrong packet length */
1462 al=SSL_AD_DECODE_ERROR;
1463 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1464 goto f_err;
1465 }
1466
1467 #ifndef OPENSSL_NO_RSA
1468 if (pkey->type == EVP_PKEY_RSA)
1469 {
1470 int num;
1471
1472 j=0;
1473 q=md_buf;
1474 for (num=2; num > 0; num--)
1475 {
1476 EVP_DigestInit_ex(&md_ctx,(num == 2)
1477 ?s->ctx->md5:s->ctx->sha1, NULL);
1478 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1479 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1480 EVP_DigestUpdate(&md_ctx,param,param_len);
1481 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1482 q+=i;
1483 j+=i;
1484 }
1485 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1486 pkey->pkey.rsa);
1487 if (i < 0)
1488 {
1489 al=SSL_AD_DECRYPT_ERROR;
1490 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1491 goto f_err;
1492 }
1493 if (i == 0)
1494 {
1495 /* bad signature */
1496 al=SSL_AD_DECRYPT_ERROR;
1497 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1498 goto f_err;
1499 }
1500 }
1501 else
1502 #endif
1503 #ifndef OPENSSL_NO_DSA
1504 if (pkey->type == EVP_PKEY_DSA)
1505 {
1506 /* lets do DSS */
1507 EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL);
1508 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1509 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1510 EVP_VerifyUpdate(&md_ctx,param,param_len);
1511 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1512 {
1513 /* bad signature */
1514 al=SSL_AD_DECRYPT_ERROR;
1515 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1516 goto f_err;
1517 }
1518 }
1519 else
1520 #endif
1521 #ifndef OPENSSL_NO_ECDSA
1522 if (pkey->type == EVP_PKEY_EC)
1523 {
1524 /* let's do ECDSA */
1525 EVP_VerifyInit_ex(&md_ctx,EVP_ecdsa(), NULL);
1526 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1527 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1528 EVP_VerifyUpdate(&md_ctx,param,param_len);
1529 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1530 {
1531 /* bad signature */
1532 al=SSL_AD_DECRYPT_ERROR;
1533 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1534 goto f_err;
1535 }
1536 }
1537 else
1538 #endif
1539 {
1540 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1541 goto err;
1542 }
1543 }
1544 else
1545 {
1546 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
1547 /* aNULL or kPSK do not need public keys */
1548 {
1549 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1550 goto err;
1551 }
1552 /* still data left over */
1553 if (n != 0)
1554 {
1555 al=SSL_AD_DECODE_ERROR;
1556 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1557 goto f_err;
1558 }
1559 }
1560 EVP_PKEY_free(pkey);
1561 EVP_MD_CTX_cleanup(&md_ctx);
1562 return(1);
1563 f_err:
1564 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1565 err:
1566 EVP_PKEY_free(pkey);
1567 #ifndef OPENSSL_NO_RSA
1568 if (rsa != NULL)
1569 RSA_free(rsa);
1570 #endif
1571 #ifndef OPENSSL_NO_DH
1572 if (dh != NULL)
1573 DH_free(dh);
1574 #endif
1575 #ifndef OPENSSL_NO_ECDH
1576 BN_CTX_free(bn_ctx);
1577 EC_POINT_free(srvr_ecpoint);
1578 if (ecdh != NULL)
1579 EC_KEY_free(ecdh);
1580 #endif
1581 EVP_MD_CTX_cleanup(&md_ctx);
1582 return(-1);
1583 }
1584
1585 int ssl3_get_certificate_request(SSL *s)
1586 {
1587 int ok,ret=0;
1588 unsigned long n,nc,l;
1589 unsigned int llen,ctype_num,i;
1590 X509_NAME *xn=NULL;
1591 const unsigned char *p,*q;
1592 unsigned char *d;
1593 STACK_OF(X509_NAME) *ca_sk=NULL;
1594
1595 n=s->method->ssl_get_message(s,
1596 SSL3_ST_CR_CERT_REQ_A,
1597 SSL3_ST_CR_CERT_REQ_B,
1598 -1,
1599 s->max_cert_list,
1600 &ok);
1601
1602 if (!ok) return((int)n);
1603
1604 s->s3->tmp.cert_req=0;
1605
1606 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1607 {
1608 s->s3->tmp.reuse_message=1;
1609 return(1);
1610 }
1611
1612 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1613 {
1614 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1615 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1616 goto err;
1617 }
1618
1619 /* TLS does not like anon-DH with client cert */
1620 if (s->version > SSL3_VERSION)
1621 {
1622 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
1623 {
1624 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1625 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1626 goto err;
1627 }
1628 }
1629
1630 p=d=(unsigned char *)s->init_msg;
1631
1632 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1633 {
1634 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1635 goto err;
1636 }
1637
1638 /* get the certificate types */
1639 ctype_num= *(p++);
1640 if (ctype_num > SSL3_CT_NUMBER)
1641 ctype_num=SSL3_CT_NUMBER;
1642 for (i=0; i<ctype_num; i++)
1643 s->s3->tmp.ctype[i]= p[i];
1644 p+=ctype_num;
1645
1646 /* get the CA RDNs */
1647 n2s(p,llen);
1648 #if 0
1649 {
1650 FILE *out;
1651 out=fopen("/tmp/vsign.der","w");
1652 fwrite(p,1,llen,out);
1653 fclose(out);
1654 }
1655 #endif
1656
1657 if ((llen+ctype_num+2+1) != n)
1658 {
1659 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1660 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1661 goto err;
1662 }
1663
1664 for (nc=0; nc<llen; )
1665 {
1666 n2s(p,l);
1667 if ((l+nc+2) > llen)
1668 {
1669 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1670 goto cont; /* netscape bugs */
1671 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1672 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1673 goto err;
1674 }
1675
1676 q=p;
1677
1678 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1679 {
1680 /* If netscape tolerance is on, ignore errors */
1681 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1682 goto cont;
1683 else
1684 {
1685 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1686 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1687 goto err;
1688 }
1689 }
1690
1691 if (q != (p+l))
1692 {
1693 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1694 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1695 goto err;
1696 }
1697 if (!sk_X509_NAME_push(ca_sk,xn))
1698 {
1699 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1700 goto err;
1701 }
1702
1703 p+=l;
1704 nc+=l+2;
1705 }
1706
1707 if (0)
1708 {
1709 cont:
1710 ERR_clear_error();
1711 }
1712
1713 /* we should setup a certificate to return.... */
1714 s->s3->tmp.cert_req=1;
1715 s->s3->tmp.ctype_num=ctype_num;
1716 if (s->s3->tmp.ca_names != NULL)
1717 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1718 s->s3->tmp.ca_names=ca_sk;
1719 ca_sk=NULL;
1720
1721 ret=1;
1722 err:
1723 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1724 return(ret);
1725 }
1726
1727 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1728 {
1729 return(X509_NAME_cmp(*a,*b));
1730 }
1731 #ifndef OPENSSL_NO_TLSEXT
1732 int ssl3_get_new_session_ticket(SSL *s)
1733 {
1734 int ok,al,ret=0, ticklen;
1735 long n;
1736 const unsigned char *p;
1737 unsigned char *d;
1738
1739 n=s->method->ssl_get_message(s,
1740 SSL3_ST_CR_SESSION_TICKET_A,
1741 SSL3_ST_CR_SESSION_TICKET_B,
1742 -1,
1743 16384,
1744 &ok);
1745
1746 if (!ok)
1747 return((int)n);
1748
1749 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
1750 {
1751 s->s3->tmp.reuse_message=1;
1752 return(1);
1753 }
1754 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
1755 {
1756 al=SSL_AD_UNEXPECTED_MESSAGE;
1757 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
1758 goto f_err;
1759 }
1760 if (n < 6)
1761 {
1762 /* need at least ticket_lifetime_hint + ticket length */
1763 al = SSL3_AL_FATAL,SSL_AD_DECODE_ERROR;
1764 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
1765 goto f_err;
1766 }
1767 p=d=(unsigned char *)s->init_msg;
1768 n2l(p, s->session->tlsext_tick_lifetime_hint);
1769 n2s(p, ticklen);
1770 /* ticket_lifetime_hint + ticket_length + ticket */
1771 if (ticklen + 6 != n)
1772 {
1773 al = SSL3_AL_FATAL,SSL_AD_DECODE_ERROR;
1774 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
1775 goto f_err;
1776 }
1777 if (s->session->tlsext_tick)
1778 {
1779 OPENSSL_free(s->session->tlsext_tick);
1780 s->session->tlsext_ticklen = 0;
1781 }
1782 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
1783 if (!s->session->tlsext_tick)
1784 {
1785 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
1786 goto err;
1787 }
1788 memcpy(s->session->tlsext_tick, p, ticklen);
1789 s->session->tlsext_ticklen = ticklen;
1790
1791 ret=1;
1792 return(ret);
1793 f_err:
1794 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1795 err:
1796 return(-1);
1797 }
1798 #endif
1799
1800 int ssl3_get_server_done(SSL *s)
1801 {
1802 int ok,ret=0;
1803 long n;
1804
1805 n=s->method->ssl_get_message(s,
1806 SSL3_ST_CR_SRVR_DONE_A,
1807 SSL3_ST_CR_SRVR_DONE_B,
1808 SSL3_MT_SERVER_DONE,
1809 30, /* should be very small, like 0 :-) */
1810 &ok);
1811
1812 if (!ok) return((int)n);
1813 if (n > 0)
1814 {
1815 /* should contain no data */
1816 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1817 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1818 return -1;
1819 }
1820 ret=1;
1821 return(ret);
1822 }
1823
1824
1825 int ssl3_send_client_key_exchange(SSL *s)
1826 {
1827 unsigned char *p,*d;
1828 int n;
1829 unsigned long alg_k;
1830 #ifndef OPENSSL_NO_RSA
1831 unsigned char *q;
1832 EVP_PKEY *pkey=NULL;
1833 #endif
1834 #ifndef OPENSSL_NO_KRB5
1835 KSSL_ERR kssl_err;
1836 #endif /* OPENSSL_NO_KRB5 */
1837 #ifndef OPENSSL_NO_ECDH
1838 EC_KEY *clnt_ecdh = NULL;
1839 const EC_POINT *srvr_ecpoint = NULL;
1840 EVP_PKEY *srvr_pub_pkey = NULL;
1841 unsigned char *encodedPoint = NULL;
1842 int encoded_pt_len = 0;
1843 BN_CTX * bn_ctx = NULL;
1844 #endif
1845
1846 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1847 {
1848 d=(unsigned char *)s->init_buf->data;
1849 p= &(d[4]);
1850
1851 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1852
1853 /* Fool emacs indentation */
1854 if (0) {}
1855 #ifndef OPENSSL_NO_RSA
1856 else if (alg_k & SSL_kRSA)
1857 {
1858 RSA *rsa;
1859 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1860
1861 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1862 rsa=s->session->sess_cert->peer_rsa_tmp;
1863 else
1864 {
1865 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1866 if ((pkey == NULL) ||
1867 (pkey->type != EVP_PKEY_RSA) ||
1868 (pkey->pkey.rsa == NULL))
1869 {
1870 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1871 goto err;
1872 }
1873 rsa=pkey->pkey.rsa;
1874 EVP_PKEY_free(pkey);
1875 }
1876
1877 tmp_buf[0]=s->client_version>>8;
1878 tmp_buf[1]=s->client_version&0xff;
1879 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
1880 goto err;
1881
1882 s->session->master_key_length=sizeof tmp_buf;
1883
1884 q=p;
1885 /* Fix buf for TLS and beyond */
1886 if (s->version > SSL3_VERSION)
1887 p+=2;
1888 n=RSA_public_encrypt(sizeof tmp_buf,
1889 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1890 #ifdef PKCS1_CHECK
1891 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1892 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1893 #endif
1894 if (n <= 0)
1895 {
1896 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1897 goto err;
1898 }
1899
1900 /* Fix buf for TLS and beyond */
1901 if (s->version > SSL3_VERSION)
1902 {
1903 s2n(n,q);
1904 n+=2;
1905 }
1906
1907 s->session->master_key_length=
1908 s->method->ssl3_enc->generate_master_secret(s,
1909 s->session->master_key,
1910 tmp_buf,sizeof tmp_buf);
1911 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
1912 }
1913 #endif
1914 #ifndef OPENSSL_NO_KRB5
1915 else if (alg_k & SSL_kKRB5)
1916 {
1917 krb5_error_code krb5rc;
1918 KSSL_CTX *kssl_ctx = s->kssl_ctx;
1919 /* krb5_data krb5_ap_req; */
1920 krb5_data *enc_ticket;
1921 krb5_data authenticator, *authp = NULL;
1922 EVP_CIPHER_CTX ciph_ctx;
1923 EVP_CIPHER *enc = NULL;
1924 unsigned char iv[EVP_MAX_IV_LENGTH];
1925 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1926 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
1927 + EVP_MAX_IV_LENGTH];
1928 int padl, outl = sizeof(epms);
1929
1930 EVP_CIPHER_CTX_init(&ciph_ctx);
1931
1932 #ifdef KSSL_DEBUG
1933 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
1934 alg_k, SSL_kKRB5);
1935 #endif /* KSSL_DEBUG */
1936
1937 authp = NULL;
1938 #ifdef KRB5SENDAUTH
1939 if (KRB5SENDAUTH) authp = &authenticator;
1940 #endif /* KRB5SENDAUTH */
1941
1942 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
1943 &kssl_err);
1944 enc = kssl_map_enc(kssl_ctx->enctype);
1945 if (enc == NULL)
1946 goto err;
1947 #ifdef KSSL_DEBUG
1948 {
1949 printf("kssl_cget_tkt rtn %d\n", krb5rc);
1950 if (krb5rc && kssl_err.text)
1951 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
1952 }
1953 #endif /* KSSL_DEBUG */
1954
1955 if (krb5rc)
1956 {
1957 ssl3_send_alert(s,SSL3_AL_FATAL,
1958 SSL_AD_HANDSHAKE_FAILURE);
1959 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1960 kssl_err.reason);
1961 goto err;
1962 }
1963
1964 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
1965 ** in place of RFC 2712 KerberosWrapper, as in:
1966 **
1967 ** Send ticket (copy to *p, set n = length)
1968 ** n = krb5_ap_req.length;
1969 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
1970 ** if (krb5_ap_req.data)
1971 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
1972 **
1973 ** Now using real RFC 2712 KerberosWrapper
1974 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
1975 ** Note: 2712 "opaque" types are here replaced
1976 ** with a 2-byte length followed by the value.
1977 ** Example:
1978 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
1979 ** Where "xx xx" = length bytes. Shown here with
1980 ** optional authenticator omitted.
1981 */
1982
1983 /* KerberosWrapper.Ticket */
1984 s2n(enc_ticket->length,p);
1985 memcpy(p, enc_ticket->data, enc_ticket->length);
1986 p+= enc_ticket->length;
1987 n = enc_ticket->length + 2;
1988
1989 /* KerberosWrapper.Authenticator */
1990 if (authp && authp->length)
1991 {
1992 s2n(authp->length,p);
1993 memcpy(p, authp->data, authp->length);
1994 p+= authp->length;
1995 n+= authp->length + 2;
1996
1997 free(authp->data);
1998 authp->data = NULL;
1999 authp->length = 0;
2000 }
2001 else
2002 {
2003 s2n(0,p);/* null authenticator length */
2004 n+=2;
2005 }
2006
2007 tmp_buf[0]=s->client_version>>8;
2008 tmp_buf[1]=s->client_version&0xff;
2009 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2010 goto err;
2011
2012 /* 20010420 VRS. Tried it this way; failed.
2013 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2014 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2015 ** kssl_ctx->length);
2016 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2017 */
2018
2019 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2020 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2021 kssl_ctx->key,iv);
2022 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2023 sizeof tmp_buf);
2024 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2025 outl += padl;
2026 if (outl > sizeof epms)
2027 {
2028 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2029 goto err;
2030 }
2031 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2032
2033 /* KerberosWrapper.EncryptedPreMasterSecret */
2034 s2n(outl,p);
2035 memcpy(p, epms, outl);
2036 p+=outl;
2037 n+=outl + 2;
2038
2039 s->session->master_key_length=
2040 s->method->ssl3_enc->generate_master_secret(s,
2041 s->session->master_key,
2042 tmp_buf, sizeof tmp_buf);
2043
2044 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2045 OPENSSL_cleanse(epms, outl);
2046 }
2047 #endif
2048 #ifndef OPENSSL_NO_DH
2049 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2050 {
2051 DH *dh_srvr,*dh_clnt;
2052
2053 if (s->session->sess_cert->peer_dh_tmp != NULL)
2054 dh_srvr=s->session->sess_cert->peer_dh_tmp;
2055 else
2056 {
2057 /* we get them from the cert */
2058 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2059 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
2060 goto err;
2061 }
2062
2063 /* generate a new random key */
2064 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2065 {
2066 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2067 goto err;
2068 }
2069 if (!DH_generate_key(dh_clnt))
2070 {
2071 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2072 goto err;
2073 }
2074
2075 /* use the 'p' output buffer for the DH key, but
2076 * make sure to clear it out afterwards */
2077
2078 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2079
2080 if (n <= 0)
2081 {
2082 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2083 goto err;
2084 }
2085
2086 /* generate master key from the result */
2087 s->session->master_key_length=
2088 s->method->ssl3_enc->generate_master_secret(s,
2089 s->session->master_key,p,n);
2090 /* clean up */
2091 memset(p,0,n);
2092
2093 /* send off the data */
2094 n=BN_num_bytes(dh_clnt->pub_key);
2095 s2n(n,p);
2096 BN_bn2bin(dh_clnt->pub_key,p);
2097 n+=2;
2098
2099 DH_free(dh_clnt);
2100
2101 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2102 }
2103 #endif
2104
2105 #ifndef OPENSSL_NO_ECDH
2106 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
2107 {
2108 const EC_GROUP *srvr_group = NULL;
2109 EC_KEY *tkey;
2110 int ecdh_clnt_cert = 0;
2111 int field_size = 0;
2112
2113 /* Did we send out the client's
2114 * ECDH share for use in premaster
2115 * computation as part of client certificate?
2116 * If so, set ecdh_clnt_cert to 1.
2117 */
2118 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2119 {
2120 /* XXX: For now, we do not support client
2121 * authentication using ECDH certificates.
2122 * To add such support, one needs to add
2123 * code that checks for appropriate
2124 * conditions and sets ecdh_clnt_cert to 1.
2125 * For example, the cert have an ECC
2126 * key on the same curve as the server's
2127 * and the key should be authorized for
2128 * key agreement.
2129 *
2130 * One also needs to add code in ssl3_connect
2131 * to skip sending the certificate verify
2132 * message.
2133 *
2134 * if ((s->cert->key->privatekey != NULL) &&
2135 * (s->cert->key->privatekey->type ==
2136 * EVP_PKEY_EC) && ...)
2137 * ecdh_clnt_cert = 1;
2138 */
2139 }
2140
2141 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2142 {
2143 tkey = s->session->sess_cert->peer_ecdh_tmp;
2144 }
2145 else
2146 {
2147 /* Get the Server Public Key from Cert */
2148 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2149 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2150 if ((srvr_pub_pkey == NULL) ||
2151 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2152 (srvr_pub_pkey->pkey.ec == NULL))
2153 {
2154 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2155 ERR_R_INTERNAL_ERROR);
2156 goto err;
2157 }
2158
2159 tkey = srvr_pub_pkey->pkey.ec;
2160 }
2161
2162 srvr_group = EC_KEY_get0_group(tkey);
2163 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2164
2165 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2166 {
2167 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2168 ERR_R_INTERNAL_ERROR);
2169 goto err;
2170 }
2171
2172 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2173 {
2174 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2175 goto err;
2176 }
2177
2178 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2179 {
2180 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2181 goto err;
2182 }
2183 if (ecdh_clnt_cert)
2184 {
2185 /* Reuse key info from our certificate
2186 * We only need our private key to perform
2187 * the ECDH computation.
2188 */
2189 const BIGNUM *priv_key;
2190 tkey = s->cert->key->privatekey->pkey.ec;
2191 priv_key = EC_KEY_get0_private_key(tkey);
2192 if (priv_key == NULL)
2193 {
2194 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2195 goto err;
2196 }
2197 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2198 {
2199 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2200 goto err;
2201 }
2202 }
2203 else
2204 {
2205 /* Generate a new ECDH key pair */
2206 if (!(EC_KEY_generate_key(clnt_ecdh)))
2207 {
2208 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2209 goto err;
2210 }
2211 }
2212
2213 /* use the 'p' output buffer for the ECDH key, but
2214 * make sure to clear it out afterwards
2215 */
2216
2217 field_size = EC_GROUP_get_degree(srvr_group);
2218 if (field_size <= 0)
2219 {
2220 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2221 ERR_R_ECDH_LIB);
2222 goto err;
2223 }
2224 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2225 if (n <= 0)
2226 {
2227 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2228 ERR_R_ECDH_LIB);
2229 goto err;
2230 }
2231
2232 /* generate master key from the result */
2233 s->session->master_key_length = s->method->ssl3_enc \
2234 -> generate_master_secret(s,
2235 s->session->master_key,
2236 p, n);
2237
2238 memset(p, 0, n); /* clean up */
2239
2240 if (ecdh_clnt_cert)
2241 {
2242 /* Send empty client key exch message */
2243 n = 0;
2244 }
2245 else
2246 {
2247 /* First check the size of encoding and
2248 * allocate memory accordingly.
2249 */
2250 encoded_pt_len =
2251 EC_POINT_point2oct(srvr_group,
2252 EC_KEY_get0_public_key(clnt_ecdh),
2253 POINT_CONVERSION_UNCOMPRESSED,
2254 NULL, 0, NULL);
2255
2256 encodedPoint = (unsigned char *)
2257 OPENSSL_malloc(encoded_pt_len *
2258 sizeof(unsigned char));
2259 bn_ctx = BN_CTX_new();
2260 if ((encodedPoint == NULL) ||
2261 (bn_ctx == NULL))
2262 {
2263 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2264 goto err;
2265 }
2266
2267 /* Encode the public key */
2268 n = EC_POINT_point2oct(srvr_group,
2269 EC_KEY_get0_public_key(clnt_ecdh),
2270 POINT_CONVERSION_UNCOMPRESSED,
2271 encodedPoint, encoded_pt_len, bn_ctx);
2272
2273 *p = n; /* length of encoded point */
2274 /* Encoded point will be copied here */
2275 p += 1;
2276 /* copy the point */
2277 memcpy((unsigned char *)p, encodedPoint, n);
2278 /* increment n to account for length field */
2279 n += 1;
2280 }
2281
2282 /* Free allocated memory */
2283 BN_CTX_free(bn_ctx);
2284 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2285 if (clnt_ecdh != NULL)
2286 EC_KEY_free(clnt_ecdh);
2287 EVP_PKEY_free(srvr_pub_pkey);
2288 }
2289 #endif /* !OPENSSL_NO_ECDH */
2290 #ifndef OPENSSL_NO_PSK
2291 else if (alg_k & SSL_kPSK)
2292 {
2293 char identity[PSK_MAX_IDENTITY_LEN];
2294 unsigned char *t = NULL;
2295 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
2296 unsigned int pre_ms_len = 0, psk_len = 0;
2297 int psk_err = 1;
2298
2299 n = 0;
2300 if (s->psk_client_callback == NULL)
2301 {
2302 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2303 SSL_R_PSK_NO_CLIENT_CB);
2304 goto err;
2305 }
2306
2307 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
2308 identity, PSK_MAX_IDENTITY_LEN,
2309 psk_or_pre_ms, sizeof(psk_or_pre_ms));
2310 if (psk_len > PSK_MAX_PSK_LEN)
2311 {
2312 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2313 ERR_R_INTERNAL_ERROR);
2314 goto psk_err;
2315 }
2316 else if (psk_len == 0)
2317 {
2318 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2319 SSL_R_PSK_IDENTITY_NOT_FOUND);
2320 goto psk_err;
2321 }
2322
2323 /* create PSK pre_master_secret */
2324 pre_ms_len = 2+psk_len+2+psk_len;
2325 t = psk_or_pre_ms;
2326 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
2327 s2n(psk_len, t);
2328 memset(t, 0, psk_len);
2329 t+=psk_len;
2330 s2n(psk_len, t);
2331
2332 if (s->session->psk_identity_hint != NULL)
2333 OPENSSL_free(s->session->psk_identity_hint);
2334 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
2335 if (s->ctx->psk_identity_hint != NULL &&
2336 s->session->psk_identity_hint == NULL)
2337 {
2338 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2339 ERR_R_MALLOC_FAILURE);
2340 goto psk_err;
2341 }
2342
2343 if (s->session->psk_identity != NULL)
2344 OPENSSL_free(s->session->psk_identity);
2345 s->session->psk_identity = BUF_strdup(identity);
2346 if (s->session->psk_identity == NULL)
2347 {
2348 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2349 ERR_R_MALLOC_FAILURE);
2350 goto psk_err;
2351 }
2352
2353 s->session->master_key_length =
2354 s->method->ssl3_enc->generate_master_secret(s,
2355 s->session->master_key,
2356 psk_or_pre_ms, pre_ms_len);
2357 n = strlen(identity);
2358 s2n(n, p);
2359 memcpy(p, identity, n);
2360 n+=2;
2361 psk_err = 0;
2362 psk_err:
2363 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
2364 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
2365 if (psk_err != 0)
2366 {
2367 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2368 goto err;
2369 }
2370 }
2371 #endif
2372 else
2373 {
2374 ssl3_send_alert(s, SSL3_AL_FATAL,
2375 SSL_AD_HANDSHAKE_FAILURE);
2376 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2377 ERR_R_INTERNAL_ERROR);
2378 goto err;
2379 }
2380
2381 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
2382 l2n3(n,d);
2383
2384 s->state=SSL3_ST_CW_KEY_EXCH_B;
2385 /* number of bytes to write */
2386 s->init_num=n+4;
2387 s->init_off=0;
2388 }
2389
2390 /* SSL3_ST_CW_KEY_EXCH_B */
2391 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2392 err:
2393 #ifndef OPENSSL_NO_ECDH
2394 BN_CTX_free(bn_ctx);
2395 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2396 if (clnt_ecdh != NULL)
2397 EC_KEY_free(clnt_ecdh);
2398 EVP_PKEY_free(srvr_pub_pkey);
2399 #endif
2400 return(-1);
2401 }
2402
2403 int ssl3_send_client_verify(SSL *s)
2404 {
2405 unsigned char *p,*d;
2406 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
2407 EVP_PKEY *pkey;
2408 #ifndef OPENSSL_NO_RSA
2409 unsigned u=0;
2410 #endif
2411 unsigned long n;
2412 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
2413 int j;
2414 #endif
2415
2416 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
2417 {
2418 d=(unsigned char *)s->init_buf->data;
2419 p= &(d[4]);
2420 pkey=s->cert->key->privatekey;
2421
2422 s->method->ssl3_enc->cert_verify_mac(s,
2423 NID_sha1,
2424 &(data[MD5_DIGEST_LENGTH]));
2425
2426 #ifndef OPENSSL_NO_RSA
2427 if (pkey->type == EVP_PKEY_RSA)
2428 {
2429 s->method->ssl3_enc->cert_verify_mac(s,
2430 NID_md5,
2431 &(data[0]));
2432 if (RSA_sign(NID_md5_sha1, data,
2433 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
2434 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
2435 {
2436 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
2437 goto err;
2438 }
2439 s2n(u,p);
2440 n=u+2;
2441 }
2442 else
2443 #endif
2444 #ifndef OPENSSL_NO_DSA
2445 if (pkey->type == EVP_PKEY_DSA)
2446 {
2447 if (!DSA_sign(pkey->save_type,
2448 &(data[MD5_DIGEST_LENGTH]),
2449 SHA_DIGEST_LENGTH,&(p[2]),
2450 (unsigned int *)&j,pkey->pkey.dsa))
2451 {
2452 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
2453 goto err;
2454 }
2455 s2n(j,p);
2456 n=j+2;
2457 }
2458 else
2459 #endif
2460 #ifndef OPENSSL_NO_ECDSA
2461 if (pkey->type == EVP_PKEY_EC)
2462 {
2463 if (!ECDSA_sign(pkey->save_type,
2464 &(data[MD5_DIGEST_LENGTH]),
2465 SHA_DIGEST_LENGTH,&(p[2]),
2466 (unsigned int *)&j,pkey->pkey.ec))
2467 {
2468 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2469 ERR_R_ECDSA_LIB);
2470 goto err;
2471 }
2472 s2n(j,p);
2473 n=j+2;
2474 }
2475 else
2476 #endif
2477 {
2478 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
2479 goto err;
2480 }
2481 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
2482 l2n3(n,d);
2483
2484 s->state=SSL3_ST_CW_CERT_VRFY_B;
2485 s->init_num=(int)n+4;
2486 s->init_off=0;
2487 }
2488 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2489 err:
2490 return(-1);
2491 }
2492
2493 int ssl3_send_client_certificate(SSL *s)
2494 {
2495 X509 *x509=NULL;
2496 EVP_PKEY *pkey=NULL;
2497 int i;
2498 unsigned long l;
2499
2500 if (s->state == SSL3_ST_CW_CERT_A)
2501 {
2502 if ((s->cert == NULL) ||
2503 (s->cert->key->x509 == NULL) ||
2504 (s->cert->key->privatekey == NULL))
2505 s->state=SSL3_ST_CW_CERT_B;
2506 else
2507 s->state=SSL3_ST_CW_CERT_C;
2508 }
2509
2510 /* We need to get a client cert */
2511 if (s->state == SSL3_ST_CW_CERT_B)
2512 {
2513 /* If we get an error, we need to
2514 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
2515 * We then get retied later */
2516 i=0;
2517 if (s->ctx->client_cert_cb != NULL)
2518 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
2519 if (i < 0)
2520 {
2521 s->rwstate=SSL_X509_LOOKUP;
2522 return(-1);
2523 }
2524 s->rwstate=SSL_NOTHING;
2525 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
2526 {
2527 s->state=SSL3_ST_CW_CERT_B;
2528 if ( !SSL_use_certificate(s,x509) ||
2529 !SSL_use_PrivateKey(s,pkey))
2530 i=0;
2531 }
2532 else if (i == 1)
2533 {
2534 i=0;
2535 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
2536 }
2537
2538 if (x509 != NULL) X509_free(x509);
2539 if (pkey != NULL) EVP_PKEY_free(pkey);
2540 if (i == 0)
2541 {
2542 if (s->version == SSL3_VERSION)
2543 {
2544 s->s3->tmp.cert_req=0;
2545 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
2546 return(1);
2547 }
2548 else
2549 {
2550 s->s3->tmp.cert_req=2;
2551 }
2552 }
2553
2554 /* Ok, we have a cert */
2555 s->state=SSL3_ST_CW_CERT_C;
2556 }
2557
2558 if (s->state == SSL3_ST_CW_CERT_C)
2559 {
2560 s->state=SSL3_ST_CW_CERT_D;
2561 l=ssl3_output_cert_chain(s,
2562 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
2563 s->init_num=(int)l;
2564 s->init_off=0;
2565 }
2566 /* SSL3_ST_CW_CERT_D */
2567 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2568 }
2569
2570 #define has_bits(i,m) (((i)&(m)) == (m))
2571
2572 int ssl3_check_cert_and_algorithm(SSL *s)
2573 {
2574 int i,idx;
2575 long alg_k,alg_a;
2576 EVP_PKEY *pkey=NULL;
2577 SESS_CERT *sc;
2578 #ifndef OPENSSL_NO_RSA
2579 RSA *rsa;
2580 #endif
2581 #ifndef OPENSSL_NO_DH
2582 DH *dh;
2583 #endif
2584
2585 sc=s->session->sess_cert;
2586 if (sc == NULL)
2587 {
2588 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
2589 goto err;
2590 }
2591
2592 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2593 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
2594
2595 /* we don't have a certificate */
2596 if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
2597 return(1);
2598
2599 #ifndef OPENSSL_NO_RSA
2600 rsa=s->session->sess_cert->peer_rsa_tmp;
2601 #endif
2602 #ifndef OPENSSL_NO_DH
2603 dh=s->session->sess_cert->peer_dh_tmp;
2604 #endif
2605
2606 /* This is the passed certificate */
2607
2608 idx=sc->peer_cert_type;
2609 #ifndef OPENSSL_NO_ECDH
2610 if (idx == SSL_PKEY_ECC)
2611 {
2612 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
2613 s->s3->tmp.new_cipher) == 0)
2614 { /* check failed */
2615 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
2616 goto f_err;
2617 }
2618 else
2619 {
2620 return 1;
2621 }
2622 }
2623 #endif
2624 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
2625 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
2626 EVP_PKEY_free(pkey);
2627
2628
2629 /* Check that we have a certificate if we require one */
2630 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
2631 {
2632 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
2633 goto f_err;
2634 }
2635 #ifndef OPENSSL_NO_DSA
2636 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
2637 {
2638 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
2639 goto f_err;
2640 }
2641 #endif
2642 #ifndef OPENSSL_NO_RSA
2643 if ((alg_k & SSL_kRSA) &&
2644 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
2645 {
2646 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
2647 goto f_err;
2648 }
2649 #endif
2650 #ifndef OPENSSL_NO_DH
2651 if ((alg_k & SSL_kEDH) &&
2652 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
2653 {
2654 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
2655 goto f_err;
2656 }
2657 else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
2658 {
2659 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
2660 goto f_err;
2661 }
2662 #ifndef OPENSSL_NO_DSA
2663 else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
2664 {
2665 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
2666 goto f_err;
2667 }
2668 #endif
2669 #endif
2670
2671 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
2672 {
2673 #ifndef OPENSSL_NO_RSA
2674 if (alg_k & SSL_kRSA)
2675 {
2676 if (rsa == NULL
2677 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2678 {
2679 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
2680 goto f_err;
2681 }
2682 }
2683 else
2684 #endif
2685 #ifndef OPENSSL_NO_DH
2686 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2687 {
2688 if (dh == NULL
2689 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2690 {
2691 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
2692 goto f_err;
2693 }
2694 }
2695 else
2696 #endif
2697 {
2698 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
2699 goto f_err;
2700 }
2701 }
2702 return(1);
2703 f_err:
2704 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2705 err:
2706 return(0);
2707 }
2708
2709 /* Check to see if handshake is full or resumed. Usually this is just a
2710 * case of checking to see if a cache hit has occurred. In the case of
2711 * session tickets we have to check the next message to be sure.
2712 */
2713
2714 #ifndef OPENSSL_NO_TLSEXT
2715 static int ssl3_check_finished(SSL *s)
2716 {
2717 int ok;
2718 long n;
2719 if (!s->session->tlsext_tick)
2720 return 1;
2721 /* this function is called when we really expect a Certificate
2722 * message, so permit appropriate message length */
2723 n=s->method->ssl_get_message(s,
2724 SSL3_ST_CR_CERT_A,
2725 SSL3_ST_CR_CERT_B,
2726 -1,
2727 s->max_cert_list,
2728 &ok);
2729 if (!ok) return((int)n);
2730 s->s3->tmp.reuse_message = 1;
2731 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
2732 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
2733 return 2;
2734
2735 return 1;
2736 }
2737 #endif
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