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When processing ClientHello.cipher_suites, don't ignore cipher suites
[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) 1998-2003 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 #include <stdio.h>
126 #include "ssl_locl.h"
127 #include "kssl_lcl.h"
128 #include <openssl/buffer.h>
129 #include <openssl/rand.h>
130 #include <openssl/objects.h>
131 #include <openssl/evp.h>
132 #include <openssl/md5.h>
133 #ifdef OPENSSL_FIPS
134 #include <openssl/fips.h>
135 #endif
136
137 #ifndef OPENSSL_NO_DH
138 #include <openssl/dh.h>
139 #endif
140 #include <openssl/bn.h>
141 #ifndef OPENSSL_NO_ENGINE
142 #include <openssl/engine.h>
143 #endif
144
145 static SSL_METHOD *ssl3_get_client_method(int ver);
146 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
147
148 #ifndef OPENSSL_NO_ECDH
149 static int curve_id2nid(int curve_id);
150 int check_srvr_ecc_cert_and_alg(X509 *x, SSL_CIPHER *cs);
151 #endif
152
153 static SSL_METHOD *ssl3_get_client_method(int ver)
154 {
155 if (ver == SSL3_VERSION)
156 return(SSLv3_client_method());
157 else
158 return(NULL);
159 }
160
161 IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
162 ssl_undefined_function,
163 ssl3_connect,
164 ssl3_get_client_method)
165
166 int ssl3_connect(SSL *s)
167 {
168 BUF_MEM *buf=NULL;
169 unsigned long Time=(unsigned long)time(NULL);
170 void (*cb)(const SSL *ssl,int type,int val)=NULL;
171 int ret= -1;
172 int new_state,state,skip=0;
173
174 RAND_add(&Time,sizeof(Time),0);
175 ERR_clear_error();
176 clear_sys_error();
177
178 if (s->info_callback != NULL)
179 cb=s->info_callback;
180 else if (s->ctx->info_callback != NULL)
181 cb=s->ctx->info_callback;
182
183 s->in_handshake++;
184 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
185
186 for (;;)
187 {
188 state=s->state;
189
190 switch(s->state)
191 {
192 case SSL_ST_RENEGOTIATE:
193 s->new_session=1;
194 s->state=SSL_ST_CONNECT;
195 s->ctx->stats.sess_connect_renegotiate++;
196 /* break */
197 case SSL_ST_BEFORE:
198 case SSL_ST_CONNECT:
199 case SSL_ST_BEFORE|SSL_ST_CONNECT:
200 case SSL_ST_OK|SSL_ST_CONNECT:
201
202 s->server=0;
203 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
204
205 if ((s->version & 0xff00 ) != 0x0300)
206 {
207 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
208 ret = -1;
209 goto end;
210 }
211
212 /* s->version=SSL3_VERSION; */
213 s->type=SSL_ST_CONNECT;
214
215 if (s->init_buf == NULL)
216 {
217 if ((buf=BUF_MEM_new()) == NULL)
218 {
219 ret= -1;
220 goto end;
221 }
222 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
223 {
224 ret= -1;
225 goto end;
226 }
227 s->init_buf=buf;
228 buf=NULL;
229 }
230
231 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
232
233 /* setup buffing BIO */
234 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
235
236 /* don't push the buffering BIO quite yet */
237
238 ssl3_init_finished_mac(s);
239
240 s->state=SSL3_ST_CW_CLNT_HELLO_A;
241 s->ctx->stats.sess_connect++;
242 s->init_num=0;
243 break;
244
245 case SSL3_ST_CW_CLNT_HELLO_A:
246 case SSL3_ST_CW_CLNT_HELLO_B:
247
248 s->shutdown=0;
249 ret=ssl3_client_hello(s);
250 if (ret <= 0) goto end;
251 s->state=SSL3_ST_CR_SRVR_HELLO_A;
252 s->init_num=0;
253
254 /* turn on buffering for the next lot of output */
255 if (s->bbio != s->wbio)
256 s->wbio=BIO_push(s->bbio,s->wbio);
257
258 break;
259
260 case SSL3_ST_CR_SRVR_HELLO_A:
261 case SSL3_ST_CR_SRVR_HELLO_B:
262 ret=ssl3_get_server_hello(s);
263 if (ret <= 0) goto end;
264 if (s->hit)
265 {
266 s->state=SSL3_ST_CR_FINISHED_A;
267 #ifndef OPENSSL_NO_TLSEXT
268 if (s->tlsext_ticket_expected)
269 {
270 /* receive renewed session ticket */
271 s->state=SSL3_ST_CR_SESSION_TICKET_A;
272 }
273 #endif
274 }
275 else
276 s->state=SSL3_ST_CR_CERT_A;
277 s->init_num=0;
278 break;
279
280 case SSL3_ST_CR_CERT_A:
281 case SSL3_ST_CR_CERT_B:
282 #ifndef OPENSSL_NO_TLSEXT
283 ret=ssl3_check_finished(s);
284 if (ret <= 0) goto end;
285 if (ret == 2)
286 {
287 s->hit = 1;
288 if (s->tlsext_ticket_expected)
289 s->state=SSL3_ST_CR_SESSION_TICKET_A;
290 else
291 s->state=SSL3_ST_CR_FINISHED_A;
292 s->init_num=0;
293 break;
294 }
295 #endif
296 /* Check if it is anon DH/ECDH */
297 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
298 {
299 ret=ssl3_get_server_certificate(s);
300 if (ret <= 0) goto end;
301 #ifndef OPENSSL_NO_TLSEXT
302 if (s->tlsext_status_expected)
303 s->state=SSL3_ST_CR_CERT_STATUS_A;
304 else
305 s->state=SSL3_ST_CR_KEY_EXCH_A;
306 }
307 else
308 {
309 skip = 1;
310 s->state=SSL3_ST_CR_KEY_EXCH_A;
311 }
312 #else
313 }
314 else
315 skip=1;
316
317 s->state=SSL3_ST_CR_KEY_EXCH_A;
318 #endif
319 s->init_num=0;
320 break;
321
322 case SSL3_ST_CR_KEY_EXCH_A:
323 case SSL3_ST_CR_KEY_EXCH_B:
324 ret=ssl3_get_key_exchange(s);
325 if (ret <= 0) goto end;
326 s->state=SSL3_ST_CR_CERT_REQ_A;
327 s->init_num=0;
328
329 /* at this point we check that we have the
330 * required stuff from the server */
331 if (!ssl3_check_cert_and_algorithm(s))
332 {
333 ret= -1;
334 goto end;
335 }
336 break;
337
338 case SSL3_ST_CR_CERT_REQ_A:
339 case SSL3_ST_CR_CERT_REQ_B:
340 ret=ssl3_get_certificate_request(s);
341 if (ret <= 0) goto end;
342 s->state=SSL3_ST_CR_SRVR_DONE_A;
343 s->init_num=0;
344 break;
345
346 case SSL3_ST_CR_SRVR_DONE_A:
347 case SSL3_ST_CR_SRVR_DONE_B:
348 ret=ssl3_get_server_done(s);
349 if (ret <= 0) goto end;
350 if (s->s3->tmp.cert_req)
351 s->state=SSL3_ST_CW_CERT_A;
352 else
353 s->state=SSL3_ST_CW_KEY_EXCH_A;
354 s->init_num=0;
355
356 break;
357
358 case SSL3_ST_CW_CERT_A:
359 case SSL3_ST_CW_CERT_B:
360 case SSL3_ST_CW_CERT_C:
361 case SSL3_ST_CW_CERT_D:
362 ret=ssl3_send_client_certificate(s);
363 if (ret <= 0) goto end;
364 s->state=SSL3_ST_CW_KEY_EXCH_A;
365 s->init_num=0;
366 break;
367
368 case SSL3_ST_CW_KEY_EXCH_A:
369 case SSL3_ST_CW_KEY_EXCH_B:
370 ret=ssl3_send_client_key_exchange(s);
371 if (ret <= 0) goto end;
372 /* EAY EAY EAY need to check for DH fix cert
373 * sent back */
374 /* For TLS, cert_req is set to 2, so a cert chain
375 * of nothing is sent, but no verify packet is sent */
376 /* XXX: For now, we do not support client
377 * authentication in ECDH cipher suites with
378 * ECDH (rather than ECDSA) certificates.
379 * We need to skip the certificate verify
380 * message when client's ECDH public key is sent
381 * inside the client certificate.
382 */
383 if (s->s3->tmp.cert_req == 1)
384 {
385 s->state=SSL3_ST_CW_CERT_VRFY_A;
386 }
387 else
388 {
389 s->state=SSL3_ST_CW_CHANGE_A;
390 s->s3->change_cipher_spec=0;
391 }
392
393 s->init_num=0;
394 break;
395
396 case SSL3_ST_CW_CERT_VRFY_A:
397 case SSL3_ST_CW_CERT_VRFY_B:
398 ret=ssl3_send_client_verify(s);
399 if (ret <= 0) goto end;
400 s->state=SSL3_ST_CW_CHANGE_A;
401 s->init_num=0;
402 s->s3->change_cipher_spec=0;
403 break;
404
405 case SSL3_ST_CW_CHANGE_A:
406 case SSL3_ST_CW_CHANGE_B:
407 ret=ssl3_send_change_cipher_spec(s,
408 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
409 if (ret <= 0) goto end;
410 s->state=SSL3_ST_CW_FINISHED_A;
411 s->init_num=0;
412
413 s->session->cipher=s->s3->tmp.new_cipher;
414 #ifdef OPENSSL_NO_COMP
415 s->session->compress_meth=0;
416 #else
417 if (s->s3->tmp.new_compression == NULL)
418 s->session->compress_meth=0;
419 else
420 s->session->compress_meth=
421 s->s3->tmp.new_compression->id;
422 #endif
423 if (!s->method->ssl3_enc->setup_key_block(s))
424 {
425 ret= -1;
426 goto end;
427 }
428
429 if (!s->method->ssl3_enc->change_cipher_state(s,
430 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
431 {
432 ret= -1;
433 goto end;
434 }
435
436 break;
437
438 case SSL3_ST_CW_FINISHED_A:
439 case SSL3_ST_CW_FINISHED_B:
440 ret=ssl3_send_finished(s,
441 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
442 s->method->ssl3_enc->client_finished_label,
443 s->method->ssl3_enc->client_finished_label_len);
444 if (ret <= 0) goto end;
445 s->s3->flags |= SSL3_FLAGS_CCS_OK;
446 s->state=SSL3_ST_CW_FLUSH;
447
448 /* clear flags */
449 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
450 if (s->hit)
451 {
452 s->s3->tmp.next_state=SSL_ST_OK;
453 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
454 {
455 s->state=SSL_ST_OK;
456 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
457 s->s3->delay_buf_pop_ret=0;
458 }
459 }
460 else
461 {
462 #ifndef OPENSSL_NO_TLSEXT
463 /* Allow NewSessionTicket if ticket expected */
464 if (s->tlsext_ticket_expected)
465 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
466 else
467 #endif
468
469 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
470 }
471 s->init_num=0;
472 break;
473
474 #ifndef OPENSSL_NO_TLSEXT
475 case SSL3_ST_CR_SESSION_TICKET_A:
476 case SSL3_ST_CR_SESSION_TICKET_B:
477 ret=ssl3_get_new_session_ticket(s);
478 if (ret <= 0) goto end;
479 s->state=SSL3_ST_CR_FINISHED_A;
480 s->init_num=0;
481 break;
482
483 case SSL3_ST_CR_CERT_STATUS_A:
484 case SSL3_ST_CR_CERT_STATUS_B:
485 ret=ssl3_get_cert_status(s);
486 if (ret <= 0) goto end;
487 s->state=SSL3_ST_CR_KEY_EXCH_A;
488 s->init_num=0;
489 break;
490 #endif
491
492 case SSL3_ST_CR_FINISHED_A:
493 case SSL3_ST_CR_FINISHED_B:
494
495 s->s3->flags |= SSL3_FLAGS_CCS_OK;
496 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
497 SSL3_ST_CR_FINISHED_B);
498 if (ret <= 0) goto end;
499
500 if (s->hit)
501 s->state=SSL3_ST_CW_CHANGE_A;
502 else
503 s->state=SSL_ST_OK;
504 s->init_num=0;
505 break;
506
507 case SSL3_ST_CW_FLUSH:
508 s->rwstate=SSL_WRITING;
509 if (BIO_flush(s->wbio) <= 0)
510 {
511 ret= -1;
512 goto end;
513 }
514 s->rwstate=SSL_NOTHING;
515 s->state=s->s3->tmp.next_state;
516 break;
517
518 case SSL_ST_OK:
519 /* clean a few things up */
520 ssl3_cleanup_key_block(s);
521
522 if (s->init_buf != NULL)
523 {
524 BUF_MEM_free(s->init_buf);
525 s->init_buf=NULL;
526 }
527
528 /* If we are not 'joining' the last two packets,
529 * remove the buffering now */
530 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
531 ssl_free_wbio_buffer(s);
532 /* else do it later in ssl3_write */
533
534 s->init_num=0;
535 s->new_session=0;
536
537 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
538 if (s->hit) s->ctx->stats.sess_hit++;
539
540 ret=1;
541 /* s->server=0; */
542 s->handshake_func=ssl3_connect;
543 s->ctx->stats.sess_connect_good++;
544
545 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
546
547 goto end;
548 /* break; */
549
550 default:
551 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
552 ret= -1;
553 goto end;
554 /* break; */
555 }
556
557 /* did we do anything */
558 if (!s->s3->tmp.reuse_message && !skip)
559 {
560 if (s->debug)
561 {
562 if ((ret=BIO_flush(s->wbio)) <= 0)
563 goto end;
564 }
565
566 if ((cb != NULL) && (s->state != state))
567 {
568 new_state=s->state;
569 s->state=state;
570 cb(s,SSL_CB_CONNECT_LOOP,1);
571 s->state=new_state;
572 }
573 }
574 skip=0;
575 }
576 end:
577 s->in_handshake--;
578 if (buf != NULL)
579 BUF_MEM_free(buf);
580 if (cb != NULL)
581 cb(s,SSL_CB_CONNECT_EXIT,ret);
582 return(ret);
583 }
584
585
586 int ssl3_client_hello(SSL *s)
587 {
588 unsigned char *buf;
589 unsigned char *p,*d;
590 int i;
591 unsigned long Time,l;
592 #ifndef OPENSSL_NO_COMP
593 int j;
594 SSL_COMP *comp;
595 #endif
596
597 buf=(unsigned char *)s->init_buf->data;
598 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
599 {
600 SSL_SESSION *sess = s->session;
601 if ((sess == NULL) ||
602 (sess->ssl_version != s->version) ||
603 #ifdef OPENSSL_NO_TLSEXT
604 !sess->session_id_length ||
605 #else
606 (!sess->session_id_length && !sess->tlsext_tick) ||
607 #endif
608 (sess->not_resumable))
609 {
610 if (!ssl_get_new_session(s,0))
611 goto err;
612 }
613 /* else use the pre-loaded session */
614
615 p=s->s3->client_random;
616 Time=(unsigned long)time(NULL); /* Time */
617 l2n(Time,p);
618 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
619 goto err;
620
621 /* Do the message type and length last */
622 d=p= &(buf[4]);
623
624 *(p++)=s->version>>8;
625 *(p++)=s->version&0xff;
626 s->client_version=s->version;
627
628 /* Random stuff */
629 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
630 p+=SSL3_RANDOM_SIZE;
631
632 /* Session ID */
633 if (s->new_session)
634 i=0;
635 else
636 i=s->session->session_id_length;
637 *(p++)=i;
638 if (i != 0)
639 {
640 if (i > (int)sizeof(s->session->session_id))
641 {
642 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
643 goto err;
644 }
645 memcpy(p,s->session->session_id,i);
646 p+=i;
647 }
648
649 /* Ciphers supported */
650 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
651 if (i == 0)
652 {
653 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
654 goto err;
655 }
656 s2n(i,p);
657 p+=i;
658
659 /* COMPRESSION */
660 #ifdef OPENSSL_NO_COMP
661 *(p++)=1;
662 #else
663 if (s->ctx->comp_methods == NULL)
664 j=0;
665 else
666 j=sk_SSL_COMP_num(s->ctx->comp_methods);
667 *(p++)=1+j;
668 for (i=0; i<j; i++)
669 {
670 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
671 *(p++)=comp->id;
672 }
673 #endif
674 *(p++)=0; /* Add the NULL method */
675 #ifndef OPENSSL_NO_TLSEXT
676 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
677 {
678 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
679 goto err;
680 }
681 #endif
682 l=(p-d);
683 d=buf;
684 *(d++)=SSL3_MT_CLIENT_HELLO;
685 l2n3(l,d);
686
687 s->state=SSL3_ST_CW_CLNT_HELLO_B;
688 /* number of bytes to write */
689 s->init_num=p-buf;
690 s->init_off=0;
691 }
692
693 /* SSL3_ST_CW_CLNT_HELLO_B */
694 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
695 err:
696 return(-1);
697 }
698
699 int ssl3_get_server_hello(SSL *s)
700 {
701 STACK_OF(SSL_CIPHER) *sk;
702 SSL_CIPHER *c;
703 unsigned char *p,*d;
704 int i,al,ok;
705 unsigned int j;
706 long n;
707 #ifndef OPENSSL_NO_COMP
708 SSL_COMP *comp;
709 #endif
710
711 n=s->method->ssl_get_message(s,
712 SSL3_ST_CR_SRVR_HELLO_A,
713 SSL3_ST_CR_SRVR_HELLO_B,
714 -1,
715 20000, /* ?? */
716 &ok);
717
718 if (!ok) return((int)n);
719
720 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
721 {
722 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
723 {
724 if ( s->d1->send_cookie == 0)
725 {
726 s->s3->tmp.reuse_message = 1;
727 return 1;
728 }
729 else /* already sent a cookie */
730 {
731 al=SSL_AD_UNEXPECTED_MESSAGE;
732 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
733 goto f_err;
734 }
735 }
736 }
737
738 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
739 {
740 al=SSL_AD_UNEXPECTED_MESSAGE;
741 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
742 goto f_err;
743 }
744
745 d=p=(unsigned char *)s->init_msg;
746
747 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
748 {
749 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
750 s->version=(s->version&0xff00)|p[1];
751 al=SSL_AD_PROTOCOL_VERSION;
752 goto f_err;
753 }
754 p+=2;
755
756 /* load the server hello data */
757 /* load the server random */
758 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
759 p+=SSL3_RANDOM_SIZE;
760
761 /* get the session-id */
762 j= *(p++);
763
764 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
765 {
766 al=SSL_AD_ILLEGAL_PARAMETER;
767 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
768 goto f_err;
769 }
770
771 if (j != 0 && j == s->session->session_id_length
772 && memcmp(p,s->session->session_id,j) == 0)
773 {
774 if(s->sid_ctx_length != s->session->sid_ctx_length
775 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
776 {
777 /* actually a client application bug */
778 al=SSL_AD_ILLEGAL_PARAMETER;
779 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
780 goto f_err;
781 }
782 s->s3->flags |= SSL3_FLAGS_CCS_OK;
783 s->hit=1;
784 }
785 else /* a miss or crap from the other end */
786 {
787 /* If we were trying for session-id reuse, make a new
788 * SSL_SESSION so we don't stuff up other people */
789 s->hit=0;
790 if (s->session->session_id_length > 0)
791 {
792 if (!ssl_get_new_session(s,0))
793 {
794 al=SSL_AD_INTERNAL_ERROR;
795 goto f_err;
796 }
797 }
798 s->session->session_id_length=j;
799 memcpy(s->session->session_id,p,j); /* j could be 0 */
800 }
801 p+=j;
802 c=ssl_get_cipher_by_char(s,p);
803 if (c == NULL)
804 {
805 /* unknown cipher */
806 al=SSL_AD_ILLEGAL_PARAMETER;
807 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
808 goto f_err;
809 }
810 p+=ssl_put_cipher_by_char(s,NULL,NULL);
811
812 sk=ssl_get_ciphers_by_id(s);
813 i=sk_SSL_CIPHER_find(sk,c);
814 if (i < 0)
815 {
816 /* we did not say we would use this cipher */
817 al=SSL_AD_ILLEGAL_PARAMETER;
818 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
819 goto f_err;
820 }
821
822 /* Depending on the session caching (internal/external), the cipher
823 and/or cipher_id values may not be set. Make sure that
824 cipher_id is set and use it for comparison. */
825 if (s->session->cipher)
826 s->session->cipher_id = s->session->cipher->id;
827 if (s->hit && (s->session->cipher_id != c->id))
828 {
829 /* Workaround is now obsolete */
830 #if 0
831 if (!(s->options &
832 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
833 #endif
834 {
835 al=SSL_AD_ILLEGAL_PARAMETER;
836 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
837 goto f_err;
838 }
839 }
840 s->s3->tmp.new_cipher=c;
841
842 /* lets get the compression algorithm */
843 /* COMPRESSION */
844 #ifdef OPENSSL_NO_COMP
845 if (*(p++) != 0)
846 {
847 al=SSL_AD_ILLEGAL_PARAMETER;
848 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
849 goto f_err;
850 }
851 #else
852 j= *(p++);
853 if (j == 0)
854 comp=NULL;
855 else
856 comp=ssl3_comp_find(s->ctx->comp_methods,j);
857
858 if ((j != 0) && (comp == NULL))
859 {
860 al=SSL_AD_ILLEGAL_PARAMETER;
861 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
862 goto f_err;
863 }
864 else
865 {
866 s->s3->tmp.new_compression=comp;
867 }
868 #endif
869 #ifndef OPENSSL_NO_TLSEXT
870 /* TLS extensions*/
871 if (s->version >= SSL3_VERSION)
872 {
873 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al))
874 {
875 /* 'al' set by ssl_parse_serverhello_tlsext */
876 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
877 goto f_err;
878 }
879 if (ssl_check_serverhello_tlsext(s) <= 0)
880 {
881 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT);
882 goto err;
883 }
884 }
885 #endif
886
887
888 if (p != (d+n))
889 {
890 /* wrong packet length */
891 al=SSL_AD_DECODE_ERROR;
892 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
893 goto f_err;
894 }
895
896 return(1);
897 f_err:
898 ssl3_send_alert(s,SSL3_AL_FATAL,al);
899 #ifndef OPENSSL_NO_TLSEXT
900 err:
901 #endif
902 return(-1);
903 }
904
905 int ssl3_get_server_certificate(SSL *s)
906 {
907 int al,i,ok,ret= -1;
908 unsigned long n,nc,llen,l;
909 X509 *x=NULL;
910 const unsigned char *q,*p;
911 unsigned char *d;
912 STACK_OF(X509) *sk=NULL;
913 SESS_CERT *sc;
914 EVP_PKEY *pkey=NULL;
915 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
916
917 n=s->method->ssl_get_message(s,
918 SSL3_ST_CR_CERT_A,
919 SSL3_ST_CR_CERT_B,
920 -1,
921 s->max_cert_list,
922 &ok);
923
924 if (!ok) return((int)n);
925
926 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
927 ((s->s3->tmp.new_cipher->algorithms & SSL_aKRB5) &&
928 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
929 {
930 s->s3->tmp.reuse_message=1;
931 return(1);
932 }
933
934 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
935 {
936 al=SSL_AD_UNEXPECTED_MESSAGE;
937 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
938 goto f_err;
939 }
940 p=d=(unsigned char *)s->init_msg;
941
942 if ((sk=sk_X509_new_null()) == NULL)
943 {
944 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
945 goto err;
946 }
947
948 n2l3(p,llen);
949 if (llen+3 != n)
950 {
951 al=SSL_AD_DECODE_ERROR;
952 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
953 goto f_err;
954 }
955 for (nc=0; nc<llen; )
956 {
957 n2l3(p,l);
958 if ((l+nc+3) > llen)
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
965 q=p;
966 x=d2i_X509(NULL,&q,l);
967 if (x == NULL)
968 {
969 al=SSL_AD_BAD_CERTIFICATE;
970 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
971 goto f_err;
972 }
973 if (q != (p+l))
974 {
975 al=SSL_AD_DECODE_ERROR;
976 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
977 goto f_err;
978 }
979 if (!sk_X509_push(sk,x))
980 {
981 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
982 goto err;
983 }
984 x=NULL;
985 nc+=l+3;
986 p=q;
987 }
988
989 i=ssl_verify_cert_chain(s,sk);
990 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
991 #ifndef OPENSSL_NO_KRB5
992 && (s->s3->tmp.new_cipher->algorithms & (SSL_MKEY_MASK|SSL_AUTH_MASK))
993 != (SSL_aKRB5|SSL_kKRB5)
994 #endif /* OPENSSL_NO_KRB5 */
995 )
996 {
997 al=ssl_verify_alarm_type(s->verify_result);
998 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
999 goto f_err;
1000 }
1001 ERR_clear_error(); /* but we keep s->verify_result */
1002
1003 sc=ssl_sess_cert_new();
1004 if (sc == NULL) goto err;
1005
1006 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1007 s->session->sess_cert=sc;
1008
1009 sc->cert_chain=sk;
1010 /* Inconsistency alert: cert_chain does include the peer's
1011 * certificate, which we don't include in s3_srvr.c */
1012 x=sk_X509_value(sk,0);
1013 sk=NULL;
1014 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1015
1016 pkey=X509_get_pubkey(x);
1017
1018 /* VRS: allow null cert if auth == KRB5 */
1019 need_cert = ((s->s3->tmp.new_cipher->algorithms
1020 & (SSL_MKEY_MASK|SSL_AUTH_MASK))
1021 == (SSL_aKRB5|SSL_kKRB5))? 0: 1;
1022
1023 #ifdef KSSL_DEBUG
1024 printf("pkey,x = %p, %p\n", (void *)pkey,(void *)x);
1025 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1026 printf("cipher, alg, nc = %s, %lx, %d\n", s->s3->tmp.new_cipher->name,
1027 s->s3->tmp.new_cipher->algorithms, need_cert);
1028 #endif /* KSSL_DEBUG */
1029
1030 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1031 {
1032 x=NULL;
1033 al=SSL3_AL_FATAL;
1034 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1035 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1036 goto f_err;
1037 }
1038
1039 i=ssl_cert_type(x,pkey);
1040 if (need_cert && i < 0)
1041 {
1042 x=NULL;
1043 al=SSL3_AL_FATAL;
1044 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1045 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1046 goto f_err;
1047 }
1048
1049 if (need_cert)
1050 {
1051 sc->peer_cert_type=i;
1052 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1053 /* Why would the following ever happen?
1054 * We just created sc a couple of lines ago. */
1055 if (sc->peer_pkeys[i].x509 != NULL)
1056 X509_free(sc->peer_pkeys[i].x509);
1057 sc->peer_pkeys[i].x509=x;
1058 sc->peer_key= &(sc->peer_pkeys[i]);
1059
1060 if (s->session->peer != NULL)
1061 X509_free(s->session->peer);
1062 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1063 s->session->peer=x;
1064 }
1065 else
1066 {
1067 sc->peer_cert_type=i;
1068 sc->peer_key= NULL;
1069
1070 if (s->session->peer != NULL)
1071 X509_free(s->session->peer);
1072 s->session->peer=NULL;
1073 }
1074 s->session->verify_result = s->verify_result;
1075
1076 x=NULL;
1077 ret=1;
1078
1079 if (0)
1080 {
1081 f_err:
1082 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1083 }
1084 err:
1085 EVP_PKEY_free(pkey);
1086 X509_free(x);
1087 sk_X509_pop_free(sk,X509_free);
1088 return(ret);
1089 }
1090
1091 int ssl3_get_key_exchange(SSL *s)
1092 {
1093 #ifndef OPENSSL_NO_RSA
1094 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1095 #endif
1096 EVP_MD_CTX md_ctx;
1097 unsigned char *param,*p;
1098 int al,j,ok;
1099 long i,param_len,n,alg;
1100 EVP_PKEY *pkey=NULL;
1101 #ifndef OPENSSL_NO_RSA
1102 RSA *rsa=NULL;
1103 #endif
1104 #ifndef OPENSSL_NO_DH
1105 DH *dh=NULL;
1106 #endif
1107 #ifndef OPENSSL_NO_ECDH
1108 EC_KEY *ecdh = NULL;
1109 BN_CTX *bn_ctx = NULL;
1110 EC_POINT *srvr_ecpoint = NULL;
1111 int curve_nid = 0;
1112 int encoded_pt_len = 0;
1113 #endif
1114
1115 /* use same message size as in ssl3_get_certificate_request()
1116 * as ServerKeyExchange message may be skipped */
1117 n=s->method->ssl_get_message(s,
1118 SSL3_ST_CR_KEY_EXCH_A,
1119 SSL3_ST_CR_KEY_EXCH_B,
1120 -1,
1121 s->max_cert_list,
1122 &ok);
1123
1124 if (!ok) return((int)n);
1125
1126 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1127 {
1128 s->s3->tmp.reuse_message=1;
1129 return(1);
1130 }
1131
1132 param=p=(unsigned char *)s->init_msg;
1133
1134 if (s->session->sess_cert != NULL)
1135 {
1136 #ifndef OPENSSL_NO_RSA
1137 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1138 {
1139 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1140 s->session->sess_cert->peer_rsa_tmp=NULL;
1141 }
1142 #endif
1143 #ifndef OPENSSL_NO_DH
1144 if (s->session->sess_cert->peer_dh_tmp)
1145 {
1146 DH_free(s->session->sess_cert->peer_dh_tmp);
1147 s->session->sess_cert->peer_dh_tmp=NULL;
1148 }
1149 #endif
1150 #ifndef OPENSSL_NO_ECDH
1151 if (s->session->sess_cert->peer_ecdh_tmp)
1152 {
1153 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1154 s->session->sess_cert->peer_ecdh_tmp=NULL;
1155 }
1156 #endif
1157 }
1158 else
1159 {
1160 s->session->sess_cert=ssl_sess_cert_new();
1161 }
1162
1163 /* Total length of the parameters including the length prefix */
1164 param_len=0;
1165 alg=s->s3->tmp.new_cipher->algorithms;
1166 EVP_MD_CTX_init(&md_ctx);
1167
1168 al=SSL_AD_DECODE_ERROR;
1169 #ifndef OPENSSL_NO_RSA
1170 if (alg & SSL_kRSA)
1171 {
1172 if ((rsa=RSA_new()) == NULL)
1173 {
1174 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1175 goto err;
1176 }
1177
1178 param_len = 2;
1179 if (param_len > n)
1180 {
1181 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1182 SSL_R_LENGTH_TOO_SHORT);
1183 goto f_err;
1184 }
1185 n2s(p,i);
1186
1187 if (i > n - param_len)
1188 {
1189 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1190 goto f_err;
1191 }
1192 param_len += i;
1193
1194 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1195 {
1196 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1197 goto err;
1198 }
1199 p+=i;
1200
1201 if (2 > n - param_len)
1202 {
1203 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1204 SSL_R_LENGTH_TOO_SHORT);
1205 goto f_err;
1206 }
1207 param_len += 2;
1208
1209 n2s(p,i);
1210
1211 if (i > n - param_len)
1212 {
1213 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1214 goto f_err;
1215 }
1216 param_len += i;
1217
1218 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1219 {
1220 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1221 goto err;
1222 }
1223 p+=i;
1224 n-=param_len;
1225
1226 /* this should be because we are using an export cipher */
1227 if (alg & SSL_aRSA)
1228 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1229 else
1230 {
1231 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1232 goto err;
1233 }
1234 s->session->sess_cert->peer_rsa_tmp=rsa;
1235 rsa=NULL;
1236 }
1237 #else /* OPENSSL_NO_RSA */
1238 if (0)
1239 ;
1240 #endif
1241 #ifndef OPENSSL_NO_DH
1242 else if (alg & SSL_kEDH)
1243 {
1244 if ((dh=DH_new()) == NULL)
1245 {
1246 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1247 goto err;
1248 }
1249
1250 param_len = 2;
1251 if (param_len > n)
1252 {
1253 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1254 SSL_R_LENGTH_TOO_SHORT);
1255 goto f_err;
1256 }
1257 n2s(p,i);
1258
1259 if (i > n - param_len)
1260 {
1261 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1262 goto f_err;
1263 }
1264 param_len += i;
1265
1266 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1267 {
1268 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1269 goto err;
1270 }
1271 p+=i;
1272
1273 if (2 > n - param_len)
1274 {
1275 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1276 SSL_R_LENGTH_TOO_SHORT);
1277 goto f_err;
1278 }
1279 param_len += 2;
1280
1281 n2s(p,i);
1282
1283 if (i > n - param_len)
1284 {
1285 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1286 goto f_err;
1287 }
1288 param_len += i;
1289
1290 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1291 {
1292 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1293 goto err;
1294 }
1295 p+=i;
1296
1297 if (2 > n - param_len)
1298 {
1299 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1300 SSL_R_LENGTH_TOO_SHORT);
1301 goto f_err;
1302 }
1303 param_len += 2;
1304
1305 n2s(p,i);
1306
1307 if (i > n - param_len)
1308 {
1309 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1310 goto f_err;
1311 }
1312 param_len += i;
1313
1314 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1315 {
1316 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1317 goto err;
1318 }
1319 p+=i;
1320 n-=param_len;
1321
1322 #ifndef OPENSSL_NO_RSA
1323 if (alg & SSL_aRSA)
1324 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1325 #else
1326 if (0)
1327 ;
1328 #endif
1329 #ifndef OPENSSL_NO_DSA
1330 else if (alg & SSL_aDSS)
1331 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1332 #endif
1333 /* else anonymous DH, so no certificate or pkey. */
1334
1335 s->session->sess_cert->peer_dh_tmp=dh;
1336 dh=NULL;
1337 }
1338 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
1339 {
1340 al=SSL_AD_ILLEGAL_PARAMETER;
1341 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1342 goto f_err;
1343 }
1344 #endif /* !OPENSSL_NO_DH */
1345
1346 #ifndef OPENSSL_NO_ECDH
1347 else if (alg & SSL_kECDHE)
1348 {
1349 EC_GROUP *ngroup;
1350 const EC_GROUP *group;
1351
1352 if ((ecdh=EC_KEY_new()) == NULL)
1353 {
1354 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1355 goto err;
1356 }
1357
1358 /* Extract elliptic curve parameters and the
1359 * server's ephemeral ECDH public key.
1360 * Keep accumulating lengths of various components in
1361 * param_len and make sure it never exceeds n.
1362 */
1363
1364 /* XXX: For now we only support named (not generic) curves
1365 * and the ECParameters in this case is just three bytes. We
1366 * also need one byte for the length of the encoded point
1367 */
1368 param_len=4;
1369 if (param_len > n)
1370 {
1371 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1372 SSL_R_LENGTH_TOO_SHORT);
1373 goto f_err;
1374 }
1375
1376 if ((*p != NAMED_CURVE_TYPE) ||
1377 ((curve_nid = curve_id2nid(*(p + 2))) == 0))
1378 {
1379 al=SSL_AD_INTERNAL_ERROR;
1380 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1381 goto f_err;
1382 }
1383
1384 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1385 if (ngroup == NULL)
1386 {
1387 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1388 goto err;
1389 }
1390 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1391 {
1392 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1393 goto err;
1394 }
1395 EC_GROUP_free(ngroup);
1396
1397 group = EC_KEY_get0_group(ecdh);
1398
1399 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1400 (EC_GROUP_get_degree(group) > 163))
1401 {
1402 al=SSL_AD_EXPORT_RESTRICTION;
1403 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1404 goto f_err;
1405 }
1406
1407 p+=3;
1408
1409 /* Next, get the encoded ECPoint */
1410 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1411 ((bn_ctx = BN_CTX_new()) == NULL))
1412 {
1413 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1414 goto err;
1415 }
1416
1417 encoded_pt_len = *p; /* length of encoded point */
1418 p+=1;
1419
1420 if ((encoded_pt_len > n - param_len) ||
1421 (EC_POINT_oct2point(group, srvr_ecpoint,
1422 p, encoded_pt_len, bn_ctx) == 0))
1423 {
1424 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1425 goto f_err;
1426 }
1427 param_len += encoded_pt_len;
1428
1429 n-=param_len;
1430 p+=encoded_pt_len;
1431
1432 /* The ECC/TLS specification does not mention
1433 * the use of DSA to sign ECParameters in the server
1434 * key exchange message. We do support RSA and ECDSA.
1435 */
1436 if (0) ;
1437 #ifndef OPENSSL_NO_RSA
1438 else if (alg & SSL_aRSA)
1439 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1440 #endif
1441 #ifndef OPENSSL_NO_ECDSA
1442 else if (alg & SSL_aECDSA)
1443 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1444 #endif
1445 /* else anonymous ECDH, so no certificate or pkey. */
1446 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1447 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1448 ecdh=NULL;
1449 BN_CTX_free(bn_ctx);
1450 bn_ctx = NULL;
1451 EC_POINT_free(srvr_ecpoint);
1452 srvr_ecpoint = NULL;
1453 }
1454 else if (alg & SSL_kECDH)
1455 {
1456 al=SSL_AD_UNEXPECTED_MESSAGE;
1457 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1458 goto f_err;
1459 }
1460 #endif /* !OPENSSL_NO_ECDH */
1461 if (alg & SSL_aFZA)
1462 {
1463 al=SSL_AD_HANDSHAKE_FAILURE;
1464 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1465 goto f_err;
1466 }
1467
1468
1469 /* p points to the next byte, there are 'n' bytes left */
1470
1471 /* if it was signed, check the signature */
1472 if (pkey != NULL)
1473 {
1474 n2s(p,i);
1475 n-=2;
1476 j=EVP_PKEY_size(pkey);
1477
1478 /* Check signature length. If n is 0 then signature is empty */
1479 if ((i != n) || (n > j) || (n <= 0))
1480 {
1481 /* wrong packet length */
1482 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1483 goto f_err;
1484 }
1485
1486 #ifndef OPENSSL_NO_RSA
1487 if (pkey->type == EVP_PKEY_RSA)
1488 {
1489 int num;
1490 unsigned int size;
1491
1492 j=0;
1493 q=md_buf;
1494 for (num=2; num > 0; num--)
1495 {
1496 EVP_MD_CTX_set_flags(&md_ctx,
1497 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1498 EVP_DigestInit_ex(&md_ctx,(num == 2)
1499 ?s->ctx->md5:s->ctx->sha1, NULL);
1500 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1501 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1502 EVP_DigestUpdate(&md_ctx,param,param_len);
1503 EVP_DigestFinal_ex(&md_ctx,q,&size);
1504 q+=size;
1505 j+=size;
1506 }
1507 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1508 pkey->pkey.rsa);
1509 if (i < 0)
1510 {
1511 al=SSL_AD_DECRYPT_ERROR;
1512 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1513 goto f_err;
1514 }
1515 if (i == 0)
1516 {
1517 /* bad signature */
1518 al=SSL_AD_DECRYPT_ERROR;
1519 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1520 goto f_err;
1521 }
1522 }
1523 else
1524 #endif
1525 #ifndef OPENSSL_NO_DSA
1526 if (pkey->type == EVP_PKEY_DSA)
1527 {
1528 /* lets do DSS */
1529 EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL);
1530 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1531 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1532 EVP_VerifyUpdate(&md_ctx,param,param_len);
1533 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1534 {
1535 /* bad signature */
1536 al=SSL_AD_DECRYPT_ERROR;
1537 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1538 goto f_err;
1539 }
1540 }
1541 else
1542 #endif
1543 #ifndef OPENSSL_NO_ECDSA
1544 if (pkey->type == EVP_PKEY_EC)
1545 {
1546 /* let's do ECDSA */
1547 EVP_VerifyInit_ex(&md_ctx,EVP_ecdsa(), NULL);
1548 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1549 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1550 EVP_VerifyUpdate(&md_ctx,param,param_len);
1551 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1552 {
1553 /* bad signature */
1554 al=SSL_AD_DECRYPT_ERROR;
1555 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1556 goto f_err;
1557 }
1558 }
1559 else
1560 #endif
1561 {
1562 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1563 goto err;
1564 }
1565 }
1566 else
1567 {
1568 /* still data left over */
1569 if (!(alg & SSL_aNULL))
1570 {
1571 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1572 goto err;
1573 }
1574 if (n != 0)
1575 {
1576 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1577 goto f_err;
1578 }
1579 }
1580 EVP_PKEY_free(pkey);
1581 EVP_MD_CTX_cleanup(&md_ctx);
1582 return(1);
1583 f_err:
1584 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1585 err:
1586 EVP_PKEY_free(pkey);
1587 #ifndef OPENSSL_NO_RSA
1588 if (rsa != NULL)
1589 RSA_free(rsa);
1590 #endif
1591 #ifndef OPENSSL_NO_DH
1592 if (dh != NULL)
1593 DH_free(dh);
1594 #endif
1595 #ifndef OPENSSL_NO_ECDH
1596 BN_CTX_free(bn_ctx);
1597 EC_POINT_free(srvr_ecpoint);
1598 if (ecdh != NULL)
1599 EC_KEY_free(ecdh);
1600 #endif
1601 EVP_MD_CTX_cleanup(&md_ctx);
1602 return(-1);
1603 }
1604
1605 int ssl3_get_certificate_request(SSL *s)
1606 {
1607 int ok,ret=0;
1608 unsigned long n,nc,l;
1609 unsigned int llen,ctype_num,i;
1610 X509_NAME *xn=NULL;
1611 const unsigned char *p,*q;
1612 unsigned char *d;
1613 STACK_OF(X509_NAME) *ca_sk=NULL;
1614
1615 n=s->method->ssl_get_message(s,
1616 SSL3_ST_CR_CERT_REQ_A,
1617 SSL3_ST_CR_CERT_REQ_B,
1618 -1,
1619 s->max_cert_list,
1620 &ok);
1621
1622 if (!ok) return((int)n);
1623
1624 s->s3->tmp.cert_req=0;
1625
1626 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1627 {
1628 s->s3->tmp.reuse_message=1;
1629 return(1);
1630 }
1631
1632 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1633 {
1634 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1635 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1636 goto err;
1637 }
1638
1639 /* TLS does not like anon-DH with client cert */
1640 if (s->version > SSL3_VERSION)
1641 {
1642 l=s->s3->tmp.new_cipher->algorithms;
1643 if (l & SSL_aNULL)
1644 {
1645 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1646 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1647 goto err;
1648 }
1649 }
1650
1651 p=d=(unsigned char *)s->init_msg;
1652
1653 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1654 {
1655 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1656 goto err;
1657 }
1658
1659 /* get the certificate types */
1660 ctype_num= *(p++);
1661 if (ctype_num > SSL3_CT_NUMBER)
1662 ctype_num=SSL3_CT_NUMBER;
1663 for (i=0; i<ctype_num; i++)
1664 s->s3->tmp.ctype[i]= p[i];
1665 p+=ctype_num;
1666
1667 /* get the CA RDNs */
1668 n2s(p,llen);
1669 #if 0
1670 {
1671 FILE *out;
1672 out=fopen("/tmp/vsign.der","w");
1673 fwrite(p,1,llen,out);
1674 fclose(out);
1675 }
1676 #endif
1677
1678 if ((llen+ctype_num+2+1) != n)
1679 {
1680 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1681 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1682 goto err;
1683 }
1684
1685 for (nc=0; nc<llen; )
1686 {
1687 n2s(p,l);
1688 if ((l+nc+2) > llen)
1689 {
1690 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1691 goto cont; /* netscape bugs */
1692 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1693 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1694 goto err;
1695 }
1696
1697 q=p;
1698
1699 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1700 {
1701 /* If netscape tolerance is on, ignore errors */
1702 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1703 goto cont;
1704 else
1705 {
1706 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1707 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1708 goto err;
1709 }
1710 }
1711
1712 if (q != (p+l))
1713 {
1714 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1715 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1716 goto err;
1717 }
1718 if (!sk_X509_NAME_push(ca_sk,xn))
1719 {
1720 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1721 goto err;
1722 }
1723
1724 p+=l;
1725 nc+=l+2;
1726 }
1727
1728 if (0)
1729 {
1730 cont:
1731 ERR_clear_error();
1732 }
1733
1734 /* we should setup a certificate to return.... */
1735 s->s3->tmp.cert_req=1;
1736 s->s3->tmp.ctype_num=ctype_num;
1737 if (s->s3->tmp.ca_names != NULL)
1738 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1739 s->s3->tmp.ca_names=ca_sk;
1740 ca_sk=NULL;
1741
1742 ret=1;
1743 err:
1744 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1745 return(ret);
1746 }
1747
1748 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1749 {
1750 return(X509_NAME_cmp(*a,*b));
1751 }
1752 #ifndef OPENSSL_NO_TLSEXT
1753 int ssl3_get_new_session_ticket(SSL *s)
1754 {
1755 int ok,al,ret=0, ticklen;
1756 long n;
1757 const unsigned char *p;
1758 unsigned char *d;
1759
1760 n=s->method->ssl_get_message(s,
1761 SSL3_ST_CR_SESSION_TICKET_A,
1762 SSL3_ST_CR_SESSION_TICKET_B,
1763 -1,
1764 16384,
1765 &ok);
1766
1767 if (!ok)
1768 return((int)n);
1769
1770 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
1771 {
1772 s->s3->tmp.reuse_message=1;
1773 return(1);
1774 }
1775 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
1776 {
1777 al=SSL_AD_UNEXPECTED_MESSAGE;
1778 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
1779 goto f_err;
1780 }
1781 if (n < 6)
1782 {
1783 /* need at least ticket_lifetime_hint + ticket length */
1784 al = SSL_AD_DECODE_ERROR;
1785 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
1786 goto f_err;
1787 }
1788
1789 p=d=(unsigned char *)s->init_msg;
1790 n2l(p, s->session->tlsext_tick_lifetime_hint);
1791 n2s(p, ticklen);
1792 /* ticket_lifetime_hint + ticket_length + ticket */
1793 if (ticklen + 6 != n)
1794 {
1795 al = SSL_AD_DECODE_ERROR;
1796 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
1797 goto f_err;
1798 }
1799 if (s->session->tlsext_tick)
1800 {
1801 OPENSSL_free(s->session->tlsext_tick);
1802 s->session->tlsext_ticklen = 0;
1803 }
1804 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
1805 if (!s->session->tlsext_tick)
1806 {
1807 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
1808 goto err;
1809 }
1810 memcpy(s->session->tlsext_tick, p, ticklen);
1811 s->session->tlsext_ticklen = ticklen;
1812 /* There are two ways to detect a resumed ticket sesion.
1813 * One is to set an appropriate session ID and then the server
1814 * must return a match in ServerHello. This allows the normal
1815 * client session ID matching to work and we know much
1816 * earlier that the ticket has been accepted.
1817 *
1818 * The other way is to set zero length session ID when the
1819 * ticket is presented and rely on the handshake to determine
1820 * session resumption.
1821 *
1822 * We choose the former approach because this fits in with
1823 * assumptions elsewhere in OpenSSL. The session ID is set
1824 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
1825 * ticket.
1826 */
1827 EVP_Digest(p, ticklen,
1828 s->session->session_id, &s->session->session_id_length,
1829 #ifndef OPENSSL_NO_SHA256
1830 EVP_sha256(), NULL);
1831 #else
1832 EVP_sha1(), NULL);
1833 #endif
1834 ret=1;
1835 return(ret);
1836 f_err:
1837 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1838 err:
1839 return(-1);
1840 }
1841
1842 int ssl3_get_cert_status(SSL *s)
1843 {
1844 int ok, al;
1845 unsigned long resplen;
1846 long n;
1847 const unsigned char *p;
1848
1849 n=s->method->ssl_get_message(s,
1850 SSL3_ST_CR_CERT_STATUS_A,
1851 SSL3_ST_CR_CERT_STATUS_B,
1852 SSL3_MT_CERTIFICATE_STATUS,
1853 16384,
1854 &ok);
1855
1856 if (!ok) return((int)n);
1857 if (n < 4)
1858 {
1859 /* need at least status type + length */
1860 al = SSL_AD_DECODE_ERROR;
1861 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
1862 goto f_err;
1863 }
1864 p = (unsigned char *)s->init_msg;
1865 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
1866 {
1867 al = SSL_AD_DECODE_ERROR;
1868 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
1869 goto f_err;
1870 }
1871 n2l3(p, resplen);
1872 if (resplen + 4 != (unsigned long)n)
1873 {
1874 al = SSL_AD_DECODE_ERROR;
1875 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
1876 goto f_err;
1877 }
1878 if (s->tlsext_ocsp_resp)
1879 OPENSSL_free(s->tlsext_ocsp_resp);
1880 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
1881 if (!s->tlsext_ocsp_resp)
1882 {
1883 al = SSL_AD_INTERNAL_ERROR;
1884 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
1885 goto f_err;
1886 }
1887 s->tlsext_ocsp_resplen = resplen;
1888 if (s->ctx->tlsext_status_cb)
1889 {
1890 int ret;
1891 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1892 if (ret == 0)
1893 {
1894 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
1895 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
1896 goto f_err;
1897 }
1898 if (ret < 0)
1899 {
1900 al = SSL_AD_INTERNAL_ERROR;
1901 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
1902 goto f_err;
1903 }
1904 }
1905 return 1;
1906 f_err:
1907 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1908 return(-1);
1909 }
1910 #endif
1911
1912 int ssl3_get_server_done(SSL *s)
1913 {
1914 int ok,ret=0;
1915 long n;
1916
1917 n=s->method->ssl_get_message(s,
1918 SSL3_ST_CR_SRVR_DONE_A,
1919 SSL3_ST_CR_SRVR_DONE_B,
1920 SSL3_MT_SERVER_DONE,
1921 30, /* should be very small, like 0 :-) */
1922 &ok);
1923
1924 if (!ok) return((int)n);
1925 if (n > 0)
1926 {
1927 /* should contain no data */
1928 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1929 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1930 return -1;
1931 }
1932 ret=1;
1933 return(ret);
1934 }
1935
1936
1937 int ssl3_send_client_key_exchange(SSL *s)
1938 {
1939 unsigned char *p,*d;
1940 int n;
1941 unsigned long l;
1942 #ifndef OPENSSL_NO_RSA
1943 unsigned char *q;
1944 EVP_PKEY *pkey=NULL;
1945 #endif
1946 #ifndef OPENSSL_NO_KRB5
1947 KSSL_ERR kssl_err;
1948 #endif /* OPENSSL_NO_KRB5 */
1949 #ifndef OPENSSL_NO_ECDH
1950 EC_KEY *clnt_ecdh = NULL;
1951 const EC_POINT *srvr_ecpoint = NULL;
1952 EVP_PKEY *srvr_pub_pkey = NULL;
1953 unsigned char *encodedPoint = NULL;
1954 int encoded_pt_len = 0;
1955 BN_CTX * bn_ctx = NULL;
1956 #endif
1957
1958 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1959 {
1960 d=(unsigned char *)s->init_buf->data;
1961 p= &(d[4]);
1962
1963 l=s->s3->tmp.new_cipher->algorithms;
1964
1965 /* Fool emacs indentation */
1966 if (0) {}
1967 #ifndef OPENSSL_NO_RSA
1968 else if (l & SSL_kRSA)
1969 {
1970 RSA *rsa;
1971 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1972
1973 if (s->session->sess_cert == NULL)
1974 {
1975 /* We should always have a server certificate with SSL_kRSA. */
1976 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1977 goto err;
1978 }
1979
1980 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1981 rsa=s->session->sess_cert->peer_rsa_tmp;
1982 else
1983 {
1984 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1985 if ((pkey == NULL) ||
1986 (pkey->type != EVP_PKEY_RSA) ||
1987 (pkey->pkey.rsa == NULL))
1988 {
1989 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1990 goto err;
1991 }
1992 rsa=pkey->pkey.rsa;
1993 EVP_PKEY_free(pkey);
1994 }
1995
1996 tmp_buf[0]=s->client_version>>8;
1997 tmp_buf[1]=s->client_version&0xff;
1998 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
1999 goto err;
2000
2001 s->session->master_key_length=sizeof tmp_buf;
2002
2003 q=p;
2004 /* Fix buf for TLS and beyond */
2005 if (s->version > SSL3_VERSION)
2006 p+=2;
2007 n=RSA_public_encrypt(sizeof tmp_buf,
2008 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2009 #ifdef PKCS1_CHECK
2010 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2011 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2012 #endif
2013 if (n <= 0)
2014 {
2015 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2016 goto err;
2017 }
2018
2019 /* Fix buf for TLS and beyond */
2020 if (s->version > SSL3_VERSION)
2021 {
2022 s2n(n,q);
2023 n+=2;
2024 }
2025
2026 s->session->master_key_length=
2027 s->method->ssl3_enc->generate_master_secret(s,
2028 s->session->master_key,
2029 tmp_buf,sizeof tmp_buf);
2030 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2031 }
2032 #endif
2033 #ifndef OPENSSL_NO_KRB5
2034 else if (l & SSL_kKRB5)
2035 {
2036 krb5_error_code krb5rc;
2037 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2038 /* krb5_data krb5_ap_req; */
2039 krb5_data *enc_ticket;
2040 krb5_data authenticator, *authp = NULL;
2041 EVP_CIPHER_CTX ciph_ctx;
2042 EVP_CIPHER *enc = NULL;
2043 unsigned char iv[EVP_MAX_IV_LENGTH];
2044 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2045 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2046 + EVP_MAX_IV_LENGTH];
2047 int padl, outl = sizeof(epms);
2048
2049 EVP_CIPHER_CTX_init(&ciph_ctx);
2050
2051 #ifdef KSSL_DEBUG
2052 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2053 l, SSL_kKRB5);
2054 #endif /* KSSL_DEBUG */
2055
2056 authp = NULL;
2057 #ifdef KRB5SENDAUTH
2058 if (KRB5SENDAUTH) authp = &authenticator;
2059 #endif /* KRB5SENDAUTH */
2060
2061 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2062 &kssl_err);
2063 enc = kssl_map_enc(kssl_ctx->enctype);
2064 if (enc == NULL)
2065 goto err;
2066 #ifdef KSSL_DEBUG
2067 {
2068 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2069 if (krb5rc && kssl_err.text)
2070 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2071 }
2072 #endif /* KSSL_DEBUG */
2073
2074 if (krb5rc)
2075 {
2076 ssl3_send_alert(s,SSL3_AL_FATAL,
2077 SSL_AD_HANDSHAKE_FAILURE);
2078 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2079 kssl_err.reason);
2080 goto err;
2081 }
2082
2083 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2084 ** in place of RFC 2712 KerberosWrapper, as in:
2085 **
2086 ** Send ticket (copy to *p, set n = length)
2087 ** n = krb5_ap_req.length;
2088 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2089 ** if (krb5_ap_req.data)
2090 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2091 **
2092 ** Now using real RFC 2712 KerberosWrapper
2093 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2094 ** Note: 2712 "opaque" types are here replaced
2095 ** with a 2-byte length followed by the value.
2096 ** Example:
2097 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2098 ** Where "xx xx" = length bytes. Shown here with
2099 ** optional authenticator omitted.
2100 */
2101
2102 /* KerberosWrapper.Ticket */
2103 s2n(enc_ticket->length,p);
2104 memcpy(p, enc_ticket->data, enc_ticket->length);
2105 p+= enc_ticket->length;
2106 n = enc_ticket->length + 2;
2107
2108 /* KerberosWrapper.Authenticator */
2109 if (authp && authp->length)
2110 {
2111 s2n(authp->length,p);
2112 memcpy(p, authp->data, authp->length);
2113 p+= authp->length;
2114 n+= authp->length + 2;
2115
2116 free(authp->data);
2117 authp->data = NULL;
2118 authp->length = 0;
2119 }
2120 else
2121 {
2122 s2n(0,p);/* null authenticator length */
2123 n+=2;
2124 }
2125
2126 tmp_buf[0]=s->client_version>>8;
2127 tmp_buf[1]=s->client_version&0xff;
2128 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2129 goto err;
2130
2131 /* 20010420 VRS. Tried it this way; failed.
2132 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2133 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2134 ** kssl_ctx->length);
2135 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2136 */
2137
2138 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2139 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2140 kssl_ctx->key,iv);
2141 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2142 sizeof tmp_buf);
2143 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2144 outl += padl;
2145 if (outl > sizeof epms)
2146 {
2147 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2148 goto err;
2149 }
2150 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2151
2152 /* KerberosWrapper.EncryptedPreMasterSecret */
2153 s2n(outl,p);
2154 memcpy(p, epms, outl);
2155 p+=outl;
2156 n+=outl + 2;
2157
2158 s->session->master_key_length=
2159 s->method->ssl3_enc->generate_master_secret(s,
2160 s->session->master_key,
2161 tmp_buf, sizeof tmp_buf);
2162
2163 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2164 OPENSSL_cleanse(epms, outl);
2165 }
2166 #endif
2167 #ifndef OPENSSL_NO_DH
2168 else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2169 {
2170 DH *dh_srvr,*dh_clnt;
2171
2172 if (s->session->sess_cert == NULL)
2173 {
2174 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2175 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2176 goto err;
2177 }
2178
2179 if (s->session->sess_cert->peer_dh_tmp != NULL)
2180 dh_srvr=s->session->sess_cert->peer_dh_tmp;
2181 else
2182 {
2183 /* we get them from the cert */
2184 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2185 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
2186 goto err;
2187 }
2188
2189 /* generate a new random key */
2190 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2191 {
2192 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2193 goto err;
2194 }
2195 if (!DH_generate_key(dh_clnt))
2196 {
2197 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2198 goto err;
2199 }
2200
2201 /* use the 'p' output buffer for the DH key, but
2202 * make sure to clear it out afterwards */
2203
2204 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2205
2206 if (n <= 0)
2207 {
2208 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2209 goto err;
2210 }
2211
2212 /* generate master key from the result */
2213 s->session->master_key_length=
2214 s->method->ssl3_enc->generate_master_secret(s,
2215 s->session->master_key,p,n);
2216 /* clean up */
2217 memset(p,0,n);
2218
2219 /* send off the data */
2220 n=BN_num_bytes(dh_clnt->pub_key);
2221 s2n(n,p);
2222 BN_bn2bin(dh_clnt->pub_key,p);
2223 n+=2;
2224
2225 DH_free(dh_clnt);
2226
2227 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2228 }
2229 #endif
2230
2231 #ifndef OPENSSL_NO_ECDH
2232 else if ((l & SSL_kECDH) || (l & SSL_kECDHE))
2233 {
2234 const EC_GROUP *srvr_group = NULL;
2235 EC_KEY *tkey;
2236 int ecdh_clnt_cert = 0;
2237 int field_size = 0;
2238
2239 if (s->session->sess_cert == NULL)
2240 {
2241 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2242 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2243 goto err;
2244 }
2245
2246 /* Did we send out the client's
2247 * ECDH share for use in premaster
2248 * computation as part of client certificate?
2249 * If so, set ecdh_clnt_cert to 1.
2250 */
2251 if ((l & SSL_kECDH) && (s->cert != NULL))
2252 {
2253 /* XXX: For now, we do not support client
2254 * authentication using ECDH certificates.
2255 * To add such support, one needs to add
2256 * code that checks for appropriate
2257 * conditions and sets ecdh_clnt_cert to 1.
2258 * For example, the cert have an ECC
2259 * key on the same curve as the server's
2260 * and the key should be authorized for
2261 * key agreement.
2262 *
2263 * One also needs to add code in ssl3_connect
2264 * to skip sending the certificate verify
2265 * message.
2266 *
2267 * if ((s->cert->key->privatekey != NULL) &&
2268 * (s->cert->key->privatekey->type ==
2269 * EVP_PKEY_EC) && ...)
2270 * ecdh_clnt_cert = 1;
2271 */
2272 }
2273
2274 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2275 {
2276 tkey = s->session->sess_cert->peer_ecdh_tmp;
2277 }
2278 else
2279 {
2280 /* Get the Server Public Key from Cert */
2281 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2282 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2283 if ((srvr_pub_pkey == NULL) ||
2284 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2285 (srvr_pub_pkey->pkey.ec == NULL))
2286 {
2287 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2288 ERR_R_INTERNAL_ERROR);
2289 goto err;
2290 }
2291
2292 tkey = srvr_pub_pkey->pkey.ec;
2293 }
2294
2295 srvr_group = EC_KEY_get0_group(tkey);
2296 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2297
2298 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2299 {
2300 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2301 ERR_R_INTERNAL_ERROR);
2302 goto err;
2303 }
2304
2305 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2306 {
2307 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2308 goto err;
2309 }
2310
2311 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2312 {
2313 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2314 goto err;
2315 }
2316 if (ecdh_clnt_cert)
2317 {
2318 /* Reuse key info from our certificate
2319 * We only need our private key to perform
2320 * the ECDH computation.
2321 */
2322 const BIGNUM *priv_key;
2323 tkey = s->cert->key->privatekey->pkey.ec;
2324 priv_key = EC_KEY_get0_private_key(tkey);
2325 if (priv_key == NULL)
2326 {
2327 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2328 goto err;
2329 }
2330 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2331 {
2332 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2333 goto err;
2334 }
2335 }
2336 else
2337 {
2338 /* Generate a new ECDH key pair */
2339 if (!(EC_KEY_generate_key(clnt_ecdh)))
2340 {
2341 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2342 goto err;
2343 }
2344 }
2345
2346 /* use the 'p' output buffer for the ECDH key, but
2347 * make sure to clear it out afterwards
2348 */
2349
2350 field_size = EC_GROUP_get_degree(srvr_group);
2351 if (field_size <= 0)
2352 {
2353 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2354 ERR_R_ECDH_LIB);
2355 goto err;
2356 }
2357 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2358 if (n <= 0)
2359 {
2360 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2361 ERR_R_ECDH_LIB);
2362 goto err;
2363 }
2364
2365 /* generate master key from the result */
2366 s->session->master_key_length = s->method->ssl3_enc \
2367 -> generate_master_secret(s,
2368 s->session->master_key,
2369 p, n);
2370
2371 memset(p, 0, n); /* clean up */
2372
2373 if (ecdh_clnt_cert)
2374 {
2375 /* Send empty client key exch message */
2376 n = 0;
2377 }
2378 else
2379 {
2380 /* First check the size of encoding and
2381 * allocate memory accordingly.
2382 */
2383 encoded_pt_len =
2384 EC_POINT_point2oct(srvr_group,
2385 EC_KEY_get0_public_key(clnt_ecdh),
2386 POINT_CONVERSION_UNCOMPRESSED,
2387 NULL, 0, NULL);
2388
2389 encodedPoint = (unsigned char *)
2390 OPENSSL_malloc(encoded_pt_len *
2391 sizeof(unsigned char));
2392 bn_ctx = BN_CTX_new();
2393 if ((encodedPoint == NULL) ||
2394 (bn_ctx == NULL))
2395 {
2396 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2397 goto err;
2398 }
2399
2400 /* Encode the public key */
2401 n = EC_POINT_point2oct(srvr_group,
2402 EC_KEY_get0_public_key(clnt_ecdh),
2403 POINT_CONVERSION_UNCOMPRESSED,
2404 encodedPoint, encoded_pt_len, bn_ctx);
2405
2406 *p = n; /* length of encoded point */
2407 /* Encoded point will be copied here */
2408 p += 1;
2409 /* copy the point */
2410 memcpy((unsigned char *)p, encodedPoint, n);
2411 /* increment n to account for length field */
2412 n += 1;
2413 }
2414
2415 /* Free allocated memory */
2416 BN_CTX_free(bn_ctx);
2417 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2418 if (clnt_ecdh != NULL)
2419 EC_KEY_free(clnt_ecdh);
2420 EVP_PKEY_free(srvr_pub_pkey);
2421 }
2422 #endif /* !OPENSSL_NO_ECDH */
2423 else
2424 {
2425 ssl3_send_alert(s, SSL3_AL_FATAL,
2426 SSL_AD_HANDSHAKE_FAILURE);
2427 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2428 ERR_R_INTERNAL_ERROR);
2429 goto err;
2430 }
2431
2432 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
2433 l2n3(n,d);
2434
2435 s->state=SSL3_ST_CW_KEY_EXCH_B;
2436 /* number of bytes to write */
2437 s->init_num=n+4;
2438 s->init_off=0;
2439 }
2440
2441 /* SSL3_ST_CW_KEY_EXCH_B */
2442 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2443 err:
2444 #ifndef OPENSSL_NO_ECDH
2445 BN_CTX_free(bn_ctx);
2446 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2447 if (clnt_ecdh != NULL)
2448 EC_KEY_free(clnt_ecdh);
2449 EVP_PKEY_free(srvr_pub_pkey);
2450 #endif
2451 return(-1);
2452 }
2453
2454 int ssl3_send_client_verify(SSL *s)
2455 {
2456 unsigned char *p,*d;
2457 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
2458 EVP_PKEY *pkey;
2459 #ifndef OPENSSL_NO_RSA
2460 unsigned u=0;
2461 #endif
2462 unsigned long n;
2463 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
2464 int j;
2465 #endif
2466
2467 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
2468 {
2469 d=(unsigned char *)s->init_buf->data;
2470 p= &(d[4]);
2471 pkey=s->cert->key->privatekey;
2472
2473 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
2474 &(data[MD5_DIGEST_LENGTH]));
2475
2476 #ifndef OPENSSL_NO_RSA
2477 if (pkey->type == EVP_PKEY_RSA)
2478 {
2479 s->method->ssl3_enc->cert_verify_mac(s,
2480 &(s->s3->finish_dgst1),&(data[0]));
2481 if (RSA_sign(NID_md5_sha1, data,
2482 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
2483 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
2484 {
2485 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
2486 goto err;
2487 }
2488 s2n(u,p);
2489 n=u+2;
2490 }
2491 else
2492 #endif
2493 #ifndef OPENSSL_NO_DSA
2494 if (pkey->type == EVP_PKEY_DSA)
2495 {
2496 if (!DSA_sign(pkey->save_type,
2497 &(data[MD5_DIGEST_LENGTH]),
2498 SHA_DIGEST_LENGTH,&(p[2]),
2499 (unsigned int *)&j,pkey->pkey.dsa))
2500 {
2501 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
2502 goto err;
2503 }
2504 s2n(j,p);
2505 n=j+2;
2506 }
2507 else
2508 #endif
2509 #ifndef OPENSSL_NO_ECDSA
2510 if (pkey->type == EVP_PKEY_EC)
2511 {
2512 if (!ECDSA_sign(pkey->save_type,
2513 &(data[MD5_DIGEST_LENGTH]),
2514 SHA_DIGEST_LENGTH,&(p[2]),
2515 (unsigned int *)&j,pkey->pkey.ec))
2516 {
2517 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
2518 ERR_R_ECDSA_LIB);
2519 goto err;
2520 }
2521 s2n(j,p);
2522 n=j+2;
2523 }
2524 else
2525 #endif
2526 {
2527 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
2528 goto err;
2529 }
2530 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
2531 l2n3(n,d);
2532
2533 s->state=SSL3_ST_CW_CERT_VRFY_B;
2534 s->init_num=(int)n+4;
2535 s->init_off=0;
2536 }
2537 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2538 err:
2539 return(-1);
2540 }
2541
2542 int ssl3_send_client_certificate(SSL *s)
2543 {
2544 X509 *x509=NULL;
2545 EVP_PKEY *pkey=NULL;
2546 int i;
2547 unsigned long l;
2548
2549 if (s->state == SSL3_ST_CW_CERT_A)
2550 {
2551 if ((s->cert == NULL) ||
2552 (s->cert->key->x509 == NULL) ||
2553 (s->cert->key->privatekey == NULL))
2554 s->state=SSL3_ST_CW_CERT_B;
2555 else
2556 s->state=SSL3_ST_CW_CERT_C;
2557 }
2558
2559 /* We need to get a client cert */
2560 if (s->state == SSL3_ST_CW_CERT_B)
2561 {
2562 /* If we get an error, we need to
2563 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
2564 * We then get retied later */
2565 i=0;
2566 i = ssl_do_client_cert_cb(s, &x509, &pkey);
2567 if (i < 0)
2568 {
2569 s->rwstate=SSL_X509_LOOKUP;
2570 return(-1);
2571 }
2572 s->rwstate=SSL_NOTHING;
2573 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
2574 {
2575 s->state=SSL3_ST_CW_CERT_B;
2576 if ( !SSL_use_certificate(s,x509) ||
2577 !SSL_use_PrivateKey(s,pkey))
2578 i=0;
2579 }
2580 else if (i == 1)
2581 {
2582 i=0;
2583 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
2584 }
2585
2586 if (x509 != NULL) X509_free(x509);
2587 if (pkey != NULL) EVP_PKEY_free(pkey);
2588 if (i == 0)
2589 {
2590 if (s->version == SSL3_VERSION)
2591 {
2592 s->s3->tmp.cert_req=0;
2593 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
2594 return(1);
2595 }
2596 else
2597 {
2598 s->s3->tmp.cert_req=2;
2599 }
2600 }
2601
2602 /* Ok, we have a cert */
2603 s->state=SSL3_ST_CW_CERT_C;
2604 }
2605
2606 if (s->state == SSL3_ST_CW_CERT_C)
2607 {
2608 s->state=SSL3_ST_CW_CERT_D;
2609 l=ssl3_output_cert_chain(s,
2610 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
2611 s->init_num=(int)l;
2612 s->init_off=0;
2613 }
2614 /* SSL3_ST_CW_CERT_D */
2615 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2616 }
2617
2618 #define has_bits(i,m) (((i)&(m)) == (m))
2619
2620 int ssl3_check_cert_and_algorithm(SSL *s)
2621 {
2622 int i,idx;
2623 long algs;
2624 EVP_PKEY *pkey=NULL;
2625 SESS_CERT *sc;
2626 #ifndef OPENSSL_NO_RSA
2627 RSA *rsa;
2628 #endif
2629 #ifndef OPENSSL_NO_DH
2630 DH *dh;
2631 #endif
2632
2633 sc=s->session->sess_cert;
2634
2635 algs=s->s3->tmp.new_cipher->algorithms;
2636
2637 /* we don't have a certificate */
2638 if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5))
2639 return(1);
2640
2641 if (sc == NULL)
2642 {
2643 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
2644 goto err;
2645 }
2646
2647 #ifndef OPENSSL_NO_RSA
2648 rsa=s->session->sess_cert->peer_rsa_tmp;
2649 #endif
2650 #ifndef OPENSSL_NO_DH
2651 dh=s->session->sess_cert->peer_dh_tmp;
2652 #endif
2653
2654 /* This is the passed certificate */
2655
2656 idx=sc->peer_cert_type;
2657 #ifndef OPENSSL_NO_ECDH
2658 if (idx == SSL_PKEY_ECC)
2659 {
2660 if (check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
2661 s->s3->tmp.new_cipher) == 0)
2662 { /* check failed */
2663 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
2664 goto f_err;
2665 }
2666 else
2667 {
2668 return 1;
2669 }
2670 }
2671 #endif
2672 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
2673 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
2674 EVP_PKEY_free(pkey);
2675
2676
2677 /* Check that we have a certificate if we require one */
2678 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
2679 {
2680 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
2681 goto f_err;
2682 }
2683 #ifndef OPENSSL_NO_DSA
2684 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
2685 {
2686 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
2687 goto f_err;
2688 }
2689 #endif
2690 #ifndef OPENSSL_NO_RSA
2691 if ((algs & SSL_kRSA) &&
2692 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
2693 {
2694 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
2695 goto f_err;
2696 }
2697 #endif
2698 #ifndef OPENSSL_NO_DH
2699 if ((algs & SSL_kEDH) &&
2700 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
2701 {
2702 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
2703 goto f_err;
2704 }
2705 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
2706 {
2707 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
2708 goto f_err;
2709 }
2710 #ifndef OPENSSL_NO_DSA
2711 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
2712 {
2713 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
2714 goto f_err;
2715 }
2716 #endif
2717 #endif
2718
2719 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
2720 {
2721 #ifndef OPENSSL_NO_RSA
2722 if (algs & SSL_kRSA)
2723 {
2724 if (rsa == NULL
2725 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2726 {
2727 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
2728 goto f_err;
2729 }
2730 }
2731 else
2732 #endif
2733 #ifndef OPENSSL_NO_DH
2734 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2735 {
2736 if (dh == NULL
2737 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2738 {
2739 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
2740 goto f_err;
2741 }
2742 }
2743 else
2744 #endif
2745 {
2746 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
2747 goto f_err;
2748 }
2749 }
2750 return(1);
2751 f_err:
2752 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2753 err:
2754 return(0);
2755 }
2756
2757
2758 #ifndef OPENSSL_NO_ECDH
2759 /* This is the complement of nid2curve_id in s3_srvr.c. */
2760 static int curve_id2nid(int curve_id)
2761 {
2762 /* ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001)
2763 * (no changes in draft-ietf-tls-ecc-03.txt [June 2003]) */
2764 static int nid_list[26] =
2765 {
2766 0,
2767 NID_sect163k1, /* sect163k1 (1) */
2768 NID_sect163r1, /* sect163r1 (2) */
2769 NID_sect163r2, /* sect163r2 (3) */
2770 NID_sect193r1, /* sect193r1 (4) */
2771 NID_sect193r2, /* sect193r2 (5) */
2772 NID_sect233k1, /* sect233k1 (6) */
2773 NID_sect233r1, /* sect233r1 (7) */
2774 NID_sect239k1, /* sect239k1 (8) */
2775 NID_sect283k1, /* sect283k1 (9) */
2776 NID_sect283r1, /* sect283r1 (10) */
2777 NID_sect409k1, /* sect409k1 (11) */
2778 NID_sect409r1, /* sect409r1 (12) */
2779 NID_sect571k1, /* sect571k1 (13) */
2780 NID_sect571r1, /* sect571r1 (14) */
2781 NID_secp160k1, /* secp160k1 (15) */
2782 NID_secp160r1, /* secp160r1 (16) */
2783 NID_secp160r2, /* secp160r2 (17) */
2784 NID_secp192k1, /* secp192k1 (18) */
2785 NID_X9_62_prime192v1, /* secp192r1 (19) */
2786 NID_secp224k1, /* secp224k1 (20) */
2787 NID_secp224r1, /* secp224r1 (21) */
2788 NID_secp256k1, /* secp256k1 (22) */
2789 NID_X9_62_prime256v1, /* secp256r1 (23) */
2790 NID_secp384r1, /* secp384r1 (24) */
2791 NID_secp521r1 /* secp521r1 (25) */
2792 };
2793
2794 if ((curve_id < 1) || (curve_id > 25)) return 0;
2795
2796 return nid_list[curve_id];
2797 }
2798 #endif
2799
2800 /* Check to see if handshake is full or resumed. Usually this is just a
2801 * case of checking to see if a cache hit has occurred. In the case of
2802 * session tickets we have to check the next message to be sure.
2803 */
2804
2805 #ifndef OPENSSL_NO_TLSEXT
2806 int ssl3_check_finished(SSL *s)
2807 {
2808 int ok;
2809 long n;
2810 /* If we have no ticket or session ID is non-zero length (a match of
2811 * a non-zero session length would never reach here) it cannot be a
2812 * resumed session.
2813 */
2814 if (!s->session->tlsext_tick || s->session->session_id_length)
2815 return 1;
2816 /* this function is called when we really expect a Certificate
2817 * message, so permit appropriate message length */
2818 n=s->method->ssl_get_message(s,
2819 SSL3_ST_CR_CERT_A,
2820 SSL3_ST_CR_CERT_B,
2821 -1,
2822 s->max_cert_list,
2823 &ok);
2824 if (!ok) return((int)n);
2825 s->s3->tmp.reuse_message = 1;
2826 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
2827 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
2828 return 2;
2829
2830 return 1;
2831 }
2832 #endif
2833
2834 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
2835 {
2836 int i = 0;
2837 #ifndef OPENSSL_NO_ENGINE
2838 if (s->ctx->client_cert_engine)
2839 {
2840 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
2841 SSL_get_client_CA_list(s),
2842 px509, ppkey, NULL, NULL, NULL);
2843 if (i != 0)
2844 return i;
2845 }
2846 #endif
2847 if (s->ctx->client_cert_cb)
2848 i = s->ctx->client_cert_cb(s,px509,ppkey);
2849 return i;
2850 }
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