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Import OpenSSL-0.9.8i.
[dragonfly.git] / crypto / openssl-0.9.7e / ssl / s3_clnt.c
blob6b4dc3e67284c2678631b8d421de042a63a1bf82
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) 1998-2002 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 #include <stdio.h>
113 #include "ssl_locl.h"
114 #include "kssl_lcl.h"
115 #include <openssl/buffer.h>
116 #include <openssl/rand.h>
117 #include <openssl/objects.h>
118 #include <openssl/evp.h>
119 #include <openssl/md5.h>
120 #include <openssl/fips.h>
121
122 static SSL_METHOD *ssl3_get_client_method(int ver);
123 static int ssl3_client_hello(SSL *s);
124 static int ssl3_get_server_hello(SSL *s);
125 static int ssl3_get_certificate_request(SSL *s);
126 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
127 static int ssl3_get_server_done(SSL *s);
128 static int ssl3_send_client_verify(SSL *s);
129 static int ssl3_send_client_certificate(SSL *s);
130 static int ssl3_send_client_key_exchange(SSL *s);
131 static int ssl3_get_key_exchange(SSL *s);
132 static int ssl3_get_server_certificate(SSL *s);
133 static int ssl3_check_cert_and_algorithm(SSL *s);
134 static SSL_METHOD *ssl3_get_client_method(int ver)
135 {
136 if (ver == SSL3_VERSION)
137 return(SSLv3_client_method());
138 else
139 return(NULL);
140 }
141
142 SSL_METHOD *SSLv3_client_method(void)
143 {
144 static int init=1;
145 static SSL_METHOD SSLv3_client_data;
146
147 if (init)
148 {
149 CRYPTO_w_lock(CRYPTO_LOCK_SSL_METHOD);
150
151 if (init)
152 {
153 memcpy((char *)&SSLv3_client_data,(char *)sslv3_base_method(),
154 sizeof(SSL_METHOD));
155 SSLv3_client_data.ssl_connect=ssl3_connect;
156 SSLv3_client_data.get_ssl_method=ssl3_get_client_method;
157 init=0;
158 }
159
160 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_METHOD);
161 }
162 return(&SSLv3_client_data);
163 }
164
165 int ssl3_connect(SSL *s)
166 {
167 BUF_MEM *buf=NULL;
168 unsigned long Time=time(NULL),l;
169 long num1;
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 s->state=SSL3_ST_CR_FINISHED_A;
266 else
267 s->state=SSL3_ST_CR_CERT_A;
268 s->init_num=0;
269 break;
270
271 case SSL3_ST_CR_CERT_A:
272 case SSL3_ST_CR_CERT_B:
273 /* Check if it is anon DH */
274 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
275 {
276 ret=ssl3_get_server_certificate(s);
277 if (ret <= 0) goto end;
278 }
279 else
280 skip=1;
281 s->state=SSL3_ST_CR_KEY_EXCH_A;
282 s->init_num=0;
283 break;
284
285 case SSL3_ST_CR_KEY_EXCH_A:
286 case SSL3_ST_CR_KEY_EXCH_B:
287 ret=ssl3_get_key_exchange(s);
288 if (ret <= 0) goto end;
289 s->state=SSL3_ST_CR_CERT_REQ_A;
290 s->init_num=0;
291
292 /* at this point we check that we have the
293 * required stuff from the server */
294 if (!ssl3_check_cert_and_algorithm(s))
295 {
296 ret= -1;
297 goto end;
298 }
299 break;
300
301 case SSL3_ST_CR_CERT_REQ_A:
302 case SSL3_ST_CR_CERT_REQ_B:
303 ret=ssl3_get_certificate_request(s);
304 if (ret <= 0) goto end;
305 s->state=SSL3_ST_CR_SRVR_DONE_A;
306 s->init_num=0;
307 break;
308
309 case SSL3_ST_CR_SRVR_DONE_A:
310 case SSL3_ST_CR_SRVR_DONE_B:
311 ret=ssl3_get_server_done(s);
312 if (ret <= 0) goto end;
313 if (s->s3->tmp.cert_req)
314 s->state=SSL3_ST_CW_CERT_A;
315 else
316 s->state=SSL3_ST_CW_KEY_EXCH_A;
317 s->init_num=0;
318
319 break;
320
321 case SSL3_ST_CW_CERT_A:
322 case SSL3_ST_CW_CERT_B:
323 case SSL3_ST_CW_CERT_C:
324 case SSL3_ST_CW_CERT_D:
325 ret=ssl3_send_client_certificate(s);
326 if (ret <= 0) goto end;
327 s->state=SSL3_ST_CW_KEY_EXCH_A;
328 s->init_num=0;
329 break;
330
331 case SSL3_ST_CW_KEY_EXCH_A:
332 case SSL3_ST_CW_KEY_EXCH_B:
333 ret=ssl3_send_client_key_exchange(s);
334 if (ret <= 0) goto end;
335 l=s->s3->tmp.new_cipher->algorithms;
336 /* EAY EAY EAY need to check for DH fix cert
337 * sent back */
338 /* For TLS, cert_req is set to 2, so a cert chain
339 * of nothing is sent, but no verify packet is sent */
340 if (s->s3->tmp.cert_req == 1)
341 {
342 s->state=SSL3_ST_CW_CERT_VRFY_A;
343 }
344 else
345 {
346 s->state=SSL3_ST_CW_CHANGE_A;
347 s->s3->change_cipher_spec=0;
348 }
349
350 s->init_num=0;
351 break;
352
353 case SSL3_ST_CW_CERT_VRFY_A:
354 case SSL3_ST_CW_CERT_VRFY_B:
355 ret=ssl3_send_client_verify(s);
356 if (ret <= 0) goto end;
357 s->state=SSL3_ST_CW_CHANGE_A;
358 s->init_num=0;
359 s->s3->change_cipher_spec=0;
360 break;
361
362 case SSL3_ST_CW_CHANGE_A:
363 case SSL3_ST_CW_CHANGE_B:
364 ret=ssl3_send_change_cipher_spec(s,
365 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
366 if (ret <= 0) goto end;
367 s->state=SSL3_ST_CW_FINISHED_A;
368 s->init_num=0;
369
370 s->session->cipher=s->s3->tmp.new_cipher;
371 if (s->s3->tmp.new_compression == NULL)
372 s->session->compress_meth=0;
373 else
374 s->session->compress_meth=
375 s->s3->tmp.new_compression->id;
376 if (!s->method->ssl3_enc->setup_key_block(s))
377 {
378 ret= -1;
379 goto end;
380 }
381
382 if (!s->method->ssl3_enc->change_cipher_state(s,
383 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
384 {
385 ret= -1;
386 goto end;
387 }
388
389 break;
390
391 case SSL3_ST_CW_FINISHED_A:
392 case SSL3_ST_CW_FINISHED_B:
393 ret=ssl3_send_finished(s,
394 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
395 s->method->ssl3_enc->client_finished_label,
396 s->method->ssl3_enc->client_finished_label_len);
397 if (ret <= 0) goto end;
398 s->state=SSL3_ST_CW_FLUSH;
399
400 /* clear flags */
401 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
402 if (s->hit)
403 {
404 s->s3->tmp.next_state=SSL_ST_OK;
405 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
406 {
407 s->state=SSL_ST_OK;
408 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
409 s->s3->delay_buf_pop_ret=0;
410 }
411 }
412 else
413 {
414 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
415 }
416 s->init_num=0;
417 break;
418
419 case SSL3_ST_CR_FINISHED_A:
420 case SSL3_ST_CR_FINISHED_B:
421
422 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
423 SSL3_ST_CR_FINISHED_B);
424 if (ret <= 0) goto end;
425
426 if (s->hit)
427 s->state=SSL3_ST_CW_CHANGE_A;
428 else
429 s->state=SSL_ST_OK;
430 s->init_num=0;
431 break;
432
433 case SSL3_ST_CW_FLUSH:
434 /* number of bytes to be flushed */
435 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
436 if (num1 > 0)
437 {
438 s->rwstate=SSL_WRITING;
439 num1=BIO_flush(s->wbio);
440 if (num1 <= 0) { ret= -1; goto end; }
441 s->rwstate=SSL_NOTHING;
442 }
443
444 s->state=s->s3->tmp.next_state;
445 break;
446
447 case SSL_ST_OK:
448 /* clean a few things up */
449 ssl3_cleanup_key_block(s);
450
451 if (s->init_buf != NULL)
452 {
453 BUF_MEM_free(s->init_buf);
454 s->init_buf=NULL;
455 }
456
457 /* If we are not 'joining' the last two packets,
458 * remove the buffering now */
459 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
460 ssl_free_wbio_buffer(s);
461 /* else do it later in ssl3_write */
462
463 s->init_num=0;
464 s->new_session=0;
465
466 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
467 if (s->hit) s->ctx->stats.sess_hit++;
468
469 ret=1;
470 /* s->server=0; */
471 s->handshake_func=ssl3_connect;
472 s->ctx->stats.sess_connect_good++;
473
474 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
475
476 goto end;
477 /* break; */
478
479 default:
480 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
481 ret= -1;
482 goto end;
483 /* break; */
484 }
485
486 /* did we do anything */
487 if (!s->s3->tmp.reuse_message && !skip)
488 {
489 if (s->debug)
490 {
491 if ((ret=BIO_flush(s->wbio)) <= 0)
492 goto end;
493 }
494
495 if ((cb != NULL) && (s->state != state))
496 {
497 new_state=s->state;
498 s->state=state;
499 cb(s,SSL_CB_CONNECT_LOOP,1);
500 s->state=new_state;
501 }
502 }
503 skip=0;
504 }
505 end:
506 s->in_handshake--;
507 if (buf != NULL)
508 BUF_MEM_free(buf);
509 if (cb != NULL)
510 cb(s,SSL_CB_CONNECT_EXIT,ret);
511 return(ret);
512 }
513
514
515 static int ssl3_client_hello(SSL *s)
516 {
517 unsigned char *buf;
518 unsigned char *p,*d;
519 int i,j;
520 unsigned long Time,l;
521 SSL_COMP *comp;
522
523 buf=(unsigned char *)s->init_buf->data;
524 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
525 {
526 if ((s->session == NULL) ||
527 (s->session->ssl_version != s->version) ||
528 (s->session->not_resumable))
529 {
530 if (!ssl_get_new_session(s,0))
531 goto err;
532 }
533 /* else use the pre-loaded session */
534
535 p=s->s3->client_random;
536 Time=time(NULL); /* Time */
537 l2n(Time,p);
538 if(RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time)) <= 0)
539 goto err;
540
541 /* Do the message type and length last */
542 d=p= &(buf[4]);
543
544 *(p++)=s->version>>8;
545 *(p++)=s->version&0xff;
546 s->client_version=s->version;
547
548 /* Random stuff */
549 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
550 p+=SSL3_RANDOM_SIZE;
551
552 /* Session ID */
553 if (s->new_session)
554 i=0;
555 else
556 i=s->session->session_id_length;
557 *(p++)=i;
558 if (i != 0)
559 {
560 if (i > sizeof s->session->session_id)
561 {
562 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
563 goto err;
564 }
565 memcpy(p,s->session->session_id,i);
566 p+=i;
567 }
568
569 /* Ciphers supported */
570 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]));
571 if (i == 0)
572 {
573 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
574 goto err;
575 }
576 s2n(i,p);
577 p+=i;
578
579 /* COMPRESSION */
580 if (s->ctx->comp_methods == NULL)
581 j=0;
582 else
583 j=sk_SSL_COMP_num(s->ctx->comp_methods);
584 *(p++)=1+j;
585 for (i=0; i<j; i++)
586 {
587 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
588 *(p++)=comp->id;
589 }
590 *(p++)=0; /* Add the NULL method */
591
592 l=(p-d);
593 d=buf;
594 *(d++)=SSL3_MT_CLIENT_HELLO;
595 l2n3(l,d);
596
597 s->state=SSL3_ST_CW_CLNT_HELLO_B;
598 /* number of bytes to write */
599 s->init_num=p-buf;
600 s->init_off=0;
601 }
602
603 /* SSL3_ST_CW_CLNT_HELLO_B */
604 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
605 err:
606 return(-1);
607 }
608
609 static int ssl3_get_server_hello(SSL *s)
610 {
611 STACK_OF(SSL_CIPHER) *sk;
612 SSL_CIPHER *c;
613 unsigned char *p,*d;
614 int i,al,ok;
615 unsigned int j;
616 long n;
617 SSL_COMP *comp;
618
619 n=ssl3_get_message(s,
620 SSL3_ST_CR_SRVR_HELLO_A,
621 SSL3_ST_CR_SRVR_HELLO_B,
622 SSL3_MT_SERVER_HELLO,
623 300, /* ?? */
624 &ok);
625
626 if (!ok) return((int)n);
627 d=p=(unsigned char *)s->init_msg;
628
629 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
630 {
631 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
632 s->version=(s->version&0xff00)|p[1];
633 al=SSL_AD_PROTOCOL_VERSION;
634 goto f_err;
635 }
636 p+=2;
637
638 /* load the server hello data */
639 /* load the server random */
640 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
641 p+=SSL3_RANDOM_SIZE;
642
643 /* get the session-id */
644 j= *(p++);
645
646 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
647 {
648 al=SSL_AD_ILLEGAL_PARAMETER;
649 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
650 goto f_err;
651 }
652
653 if (j != 0 && j == s->session->session_id_length
654 && memcmp(p,s->session->session_id,j) == 0)
655 {
656 if(s->sid_ctx_length != s->session->sid_ctx_length
657 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
658 {
659 /* actually a client application bug */
660 al=SSL_AD_ILLEGAL_PARAMETER;
661 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
662 goto f_err;
663 }
664 s->hit=1;
665 }
666 else /* a miss or crap from the other end */
667 {
668 /* If we were trying for session-id reuse, make a new
669 * SSL_SESSION so we don't stuff up other people */
670 s->hit=0;
671 if (s->session->session_id_length > 0)
672 {
673 if (!ssl_get_new_session(s,0))
674 {
675 al=SSL_AD_INTERNAL_ERROR;
676 goto f_err;
677 }
678 }
679 s->session->session_id_length=j;
680 memcpy(s->session->session_id,p,j); /* j could be 0 */
681 }
682 p+=j;
683 c=ssl_get_cipher_by_char(s,p);
684 if (c == NULL)
685 {
686 /* unknown cipher */
687 al=SSL_AD_ILLEGAL_PARAMETER;
688 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
689 goto f_err;
690 }
691 p+=ssl_put_cipher_by_char(s,NULL,NULL);
692
693 sk=ssl_get_ciphers_by_id(s);
694 i=sk_SSL_CIPHER_find(sk,c);
695 if (i < 0)
696 {
697 /* we did not say we would use this cipher */
698 al=SSL_AD_ILLEGAL_PARAMETER;
699 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
700 goto f_err;
701 }
702
703 /* Depending on the session caching (internal/external), the cipher
704 and/or cipher_id values may not be set. Make sure that
705 cipher_id is set and use it for comparison. */
706 if (s->session->cipher)
707 s->session->cipher_id = s->session->cipher->id;
708 if (s->hit && (s->session->cipher_id != c->id))
709 {
710 if (!(s->options &
711 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
712 {
713 al=SSL_AD_ILLEGAL_PARAMETER;
714 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
715 goto f_err;
716 }
717 }
718 s->s3->tmp.new_cipher=c;
719
720 /* lets get the compression algorithm */
721 /* COMPRESSION */
722 j= *(p++);
723 if (j == 0)
724 comp=NULL;
725 else
726 comp=ssl3_comp_find(s->ctx->comp_methods,j);
727
728 if ((j != 0) && (comp == NULL))
729 {
730 al=SSL_AD_ILLEGAL_PARAMETER;
731 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
732 goto f_err;
733 }
734 else
735 {
736 s->s3->tmp.new_compression=comp;
737 }
738
739 if (p != (d+n))
740 {
741 /* wrong packet length */
742 al=SSL_AD_DECODE_ERROR;
743 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
744 goto err;
745 }
746
747 return(1);
748 f_err:
749 ssl3_send_alert(s,SSL3_AL_FATAL,al);
750 err:
751 return(-1);
752 }
753
754 static int ssl3_get_server_certificate(SSL *s)
755 {
756 int al,i,ok,ret= -1;
757 unsigned long n,nc,llen,l;
758 X509 *x=NULL;
759 unsigned char *p,*d,*q;
760 STACK_OF(X509) *sk=NULL;
761 SESS_CERT *sc;
762 EVP_PKEY *pkey=NULL;
763 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
764
765 n=ssl3_get_message(s,
766 SSL3_ST_CR_CERT_A,
767 SSL3_ST_CR_CERT_B,
768 -1,
769 s->max_cert_list,
770 &ok);
771
772 if (!ok) return((int)n);
773
774 if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE)
775 {
776 s->s3->tmp.reuse_message=1;
777 return(1);
778 }
779
780 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
781 {
782 al=SSL_AD_UNEXPECTED_MESSAGE;
783 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
784 goto f_err;
785 }
786 d=p=(unsigned char *)s->init_msg;
787
788 if ((sk=sk_X509_new_null()) == NULL)
789 {
790 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
791 goto err;
792 }
793
794 n2l3(p,llen);
795 if (llen+3 != n)
796 {
797 al=SSL_AD_DECODE_ERROR;
798 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
799 goto f_err;
800 }
801 for (nc=0; nc<llen; )
802 {
803 n2l3(p,l);
804 if ((l+nc+3) > llen)
805 {
806 al=SSL_AD_DECODE_ERROR;
807 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
808 goto f_err;
809 }
810
811 q=p;
812 x=d2i_X509(NULL,&q,l);
813 if (x == NULL)
814 {
815 al=SSL_AD_BAD_CERTIFICATE;
816 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
817 goto f_err;
818 }
819 if (q != (p+l))
820 {
821 al=SSL_AD_DECODE_ERROR;
822 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
823 goto f_err;
824 }
825 if (!sk_X509_push(sk,x))
826 {
827 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
828 goto err;
829 }
830 x=NULL;
831 nc+=l+3;
832 p=q;
833 }
834
835 i=ssl_verify_cert_chain(s,sk);
836 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i)
837 #ifndef OPENSSL_NO_KRB5
838 && (s->s3->tmp.new_cipher->algorithms & (SSL_MKEY_MASK|SSL_AUTH_MASK))
839 != (SSL_aKRB5|SSL_kKRB5)
840 #endif /* OPENSSL_NO_KRB5 */
841 )
842 {
843 al=ssl_verify_alarm_type(s->verify_result);
844 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
845 goto f_err;
846 }
847 ERR_clear_error(); /* but we keep s->verify_result */
848
849 sc=ssl_sess_cert_new();
850 if (sc == NULL) goto err;
851
852 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
853 s->session->sess_cert=sc;
854
855 sc->cert_chain=sk;
856 /* Inconsistency alert: cert_chain does include the peer's
857 * certificate, which we don't include in s3_srvr.c */
858 x=sk_X509_value(sk,0);
859 sk=NULL;
860 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
861
862 pkey=X509_get_pubkey(x);
863
864 /* VRS: allow null cert if auth == KRB5 */
865 need_cert = ((s->s3->tmp.new_cipher->algorithms
866 & (SSL_MKEY_MASK|SSL_AUTH_MASK))
867 == (SSL_aKRB5|SSL_kKRB5))? 0: 1;
868
869 #ifdef KSSL_DEBUG
870 printf("pkey,x = %p, %p\n", pkey,x);
871 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
872 printf("cipher, alg, nc = %s, %lx, %d\n", s->s3->tmp.new_cipher->name,
873 s->s3->tmp.new_cipher->algorithms, need_cert);
874 #endif /* KSSL_DEBUG */
875
876 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
877 {
878 x=NULL;
879 al=SSL3_AL_FATAL;
880 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
881 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
882 goto f_err;
883 }
884
885 i=ssl_cert_type(x,pkey);
886 if (need_cert && i < 0)
887 {
888 x=NULL;
889 al=SSL3_AL_FATAL;
890 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
891 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
892 goto f_err;
893 }
894
895 if (need_cert)
896 {
897 sc->peer_cert_type=i;
898 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
899 /* Why would the following ever happen?
900 * We just created sc a couple of lines ago. */
901 if (sc->peer_pkeys[i].x509 != NULL)
902 X509_free(sc->peer_pkeys[i].x509);
903 sc->peer_pkeys[i].x509=x;
904 sc->peer_key= &(sc->peer_pkeys[i]);
905
906 if (s->session->peer != NULL)
907 X509_free(s->session->peer);
908 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
909 s->session->peer=x;
910 }
911 else
912 {
913 sc->peer_cert_type=i;
914 sc->peer_key= NULL;
915
916 if (s->session->peer != NULL)
917 X509_free(s->session->peer);
918 s->session->peer=NULL;
919 }
920 s->session->verify_result = s->verify_result;
921
922 x=NULL;
923 ret=1;
924
925 if (0)
926 {
927 f_err:
928 ssl3_send_alert(s,SSL3_AL_FATAL,al);
929 }
930 err:
931 EVP_PKEY_free(pkey);
932 X509_free(x);
933 sk_X509_pop_free(sk,X509_free);
934 return(ret);
935 }
936
937 static int ssl3_get_key_exchange(SSL *s)
938 {
939 #ifndef OPENSSL_NO_RSA
940 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
941 #endif
942 EVP_MD_CTX md_ctx;
943 unsigned char *param,*p;
944 int al,i,j,param_len,ok;
945 long n,alg;
946 EVP_PKEY *pkey=NULL;
947 #ifndef OPENSSL_NO_RSA
948 RSA *rsa=NULL;
949 #endif
950 #ifndef OPENSSL_NO_DH
951 DH *dh=NULL;
952 #endif
953
954 /* use same message size as in ssl3_get_certificate_request()
955 * as ServerKeyExchange message may be skipped */
956 n=ssl3_get_message(s,
957 SSL3_ST_CR_KEY_EXCH_A,
958 SSL3_ST_CR_KEY_EXCH_B,
959 -1,
960 s->max_cert_list,
961 &ok);
962
963 if (!ok) return((int)n);
964
965 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
966 {
967 s->s3->tmp.reuse_message=1;
968 return(1);
969 }
970
971 param=p=(unsigned char *)s->init_msg;
972
973 if (s->session->sess_cert != NULL)
974 {
975 #ifndef OPENSSL_NO_RSA
976 if (s->session->sess_cert->peer_rsa_tmp != NULL)
977 {
978 RSA_free(s->session->sess_cert->peer_rsa_tmp);
979 s->session->sess_cert->peer_rsa_tmp=NULL;
980 }
981 #endif
982 #ifndef OPENSSL_NO_DH
983 if (s->session->sess_cert->peer_dh_tmp)
984 {
985 DH_free(s->session->sess_cert->peer_dh_tmp);
986 s->session->sess_cert->peer_dh_tmp=NULL;
987 }
988 #endif
989 }
990 else
991 {
992 s->session->sess_cert=ssl_sess_cert_new();
993 }
994
995 param_len=0;
996 alg=s->s3->tmp.new_cipher->algorithms;
997 EVP_MD_CTX_init(&md_ctx);
998
999 #ifndef OPENSSL_NO_RSA
1000 if (alg & SSL_kRSA)
1001 {
1002 if ((rsa=RSA_new()) == NULL)
1003 {
1004 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1005 goto err;
1006 }
1007 n2s(p,i);
1008 param_len=i+2;
1009 if (param_len > n)
1010 {
1011 al=SSL_AD_DECODE_ERROR;
1012 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1013 goto f_err;
1014 }
1015 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1016 {
1017 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1018 goto err;
1019 }
1020 p+=i;
1021
1022 n2s(p,i);
1023 param_len+=i+2;
1024 if (param_len > n)
1025 {
1026 al=SSL_AD_DECODE_ERROR;
1027 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1028 goto f_err;
1029 }
1030 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1031 {
1032 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1033 goto err;
1034 }
1035 p+=i;
1036 n-=param_len;
1037
1038 /* this should be because we are using an export cipher */
1039 if (alg & SSL_aRSA)
1040 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1041 else
1042 {
1043 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1044 goto err;
1045 }
1046 s->session->sess_cert->peer_rsa_tmp=rsa;
1047 rsa=NULL;
1048 }
1049 #else /* OPENSSL_NO_RSA */
1050 if (0)
1051 ;
1052 #endif
1053 #ifndef OPENSSL_NO_DH
1054 else if (alg & SSL_kEDH)
1055 {
1056 if ((dh=DH_new()) == NULL)
1057 {
1058 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1059 goto err;
1060 }
1061 n2s(p,i);
1062 param_len=i+2;
1063 if (param_len > n)
1064 {
1065 al=SSL_AD_DECODE_ERROR;
1066 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1067 goto f_err;
1068 }
1069 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1070 {
1071 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1072 goto err;
1073 }
1074 p+=i;
1075
1076 n2s(p,i);
1077 param_len+=i+2;
1078 if (param_len > n)
1079 {
1080 al=SSL_AD_DECODE_ERROR;
1081 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1082 goto f_err;
1083 }
1084 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1085 {
1086 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1087 goto err;
1088 }
1089 p+=i;
1090
1091 n2s(p,i);
1092 param_len+=i+2;
1093 if (param_len > n)
1094 {
1095 al=SSL_AD_DECODE_ERROR;
1096 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1097 goto f_err;
1098 }
1099 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1100 {
1101 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1102 goto err;
1103 }
1104 p+=i;
1105 n-=param_len;
1106
1107 #ifndef OPENSSL_NO_RSA
1108 if (alg & SSL_aRSA)
1109 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1110 #else
1111 if (0)
1112 ;
1113 #endif
1114 #ifndef OPENSSL_NO_DSA
1115 else if (alg & SSL_aDSS)
1116 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1117 #endif
1118 /* else anonymous DH, so no certificate or pkey. */
1119
1120 s->session->sess_cert->peer_dh_tmp=dh;
1121 dh=NULL;
1122 }
1123 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
1124 {
1125 al=SSL_AD_ILLEGAL_PARAMETER;
1126 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1127 goto f_err;
1128 }
1129 #endif /* !OPENSSL_NO_DH */
1130 if (alg & SSL_aFZA)
1131 {
1132 al=SSL_AD_HANDSHAKE_FAILURE;
1133 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1134 goto f_err;
1135 }
1136
1137
1138 /* p points to the next byte, there are 'n' bytes left */
1139
1140
1141 /* if it was signed, check the signature */
1142 if (pkey != NULL)
1143 {
1144 n2s(p,i);
1145 n-=2;
1146 j=EVP_PKEY_size(pkey);
1147
1148 if ((i != n) || (n > j) || (n <= 0))
1149 {
1150 /* wrong packet length */
1151 al=SSL_AD_DECODE_ERROR;
1152 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1153 goto f_err;
1154 }
1155
1156 #ifndef OPENSSL_NO_RSA
1157 if (pkey->type == EVP_PKEY_RSA)
1158 {
1159 int num;
1160
1161 j=0;
1162 q=md_buf;
1163 for (num=2; num > 0; num--)
1164 {
1165 EVP_DigestInit_ex(&md_ctx,(num == 2)
1166 ?s->ctx->md5:s->ctx->sha1, NULL);
1167 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1168 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1169 EVP_DigestUpdate(&md_ctx,param,param_len);
1170 #ifdef OPENSSL_FIPS
1171 if(s->version == TLS1_VERSION && num == 2)
1172 FIPS_allow_md5(1);
1173 #endif
1174
1175 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1176 #ifdef OPENSSL_FIPS
1177 if(s->version == TLS1_VERSION && num == 2)
1178 FIPS_allow_md5(1);
1179 #endif
1180 q+=i;
1181 j+=i;
1182 }
1183 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1184 pkey->pkey.rsa);
1185 if (i < 0)
1186 {
1187 al=SSL_AD_DECRYPT_ERROR;
1188 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1189 goto f_err;
1190 }
1191 if (i == 0)
1192 {
1193 /* bad signature */
1194 al=SSL_AD_DECRYPT_ERROR;
1195 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1196 goto f_err;
1197 }
1198 }
1199 else
1200 #endif
1201 #ifndef OPENSSL_NO_DSA
1202 if (pkey->type == EVP_PKEY_DSA)
1203 {
1204 /* lets do DSS */
1205 EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL);
1206 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1207 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1208 EVP_VerifyUpdate(&md_ctx,param,param_len);
1209 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1210 {
1211 /* bad signature */
1212 al=SSL_AD_DECRYPT_ERROR;
1213 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1214 goto f_err;
1215 }
1216 }
1217 else
1218 #endif
1219 {
1220 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1221 goto err;
1222 }
1223 }
1224 else
1225 {
1226 /* still data left over */
1227 if (!(alg & SSL_aNULL))
1228 {
1229 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1230 goto err;
1231 }
1232 if (n != 0)
1233 {
1234 al=SSL_AD_DECODE_ERROR;
1235 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1236 goto f_err;
1237 }
1238 }
1239 EVP_PKEY_free(pkey);
1240 EVP_MD_CTX_cleanup(&md_ctx);
1241 return(1);
1242 f_err:
1243 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1244 err:
1245 EVP_PKEY_free(pkey);
1246 #ifndef OPENSSL_NO_RSA
1247 if (rsa != NULL)
1248 RSA_free(rsa);
1249 #endif
1250 #ifndef OPENSSL_NO_DH
1251 if (dh != NULL)
1252 DH_free(dh);
1253 #endif
1254 EVP_MD_CTX_cleanup(&md_ctx);
1255 return(-1);
1256 }
1257
1258 static int ssl3_get_certificate_request(SSL *s)
1259 {
1260 int ok,ret=0;
1261 unsigned long n,nc,l;
1262 unsigned int llen,ctype_num,i;
1263 X509_NAME *xn=NULL;
1264 unsigned char *p,*d,*q;
1265 STACK_OF(X509_NAME) *ca_sk=NULL;
1266
1267 n=ssl3_get_message(s,
1268 SSL3_ST_CR_CERT_REQ_A,
1269 SSL3_ST_CR_CERT_REQ_B,
1270 -1,
1271 s->max_cert_list,
1272 &ok);
1273
1274 if (!ok) return((int)n);
1275
1276 s->s3->tmp.cert_req=0;
1277
1278 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1279 {
1280 s->s3->tmp.reuse_message=1;
1281 return(1);
1282 }
1283
1284 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1285 {
1286 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1287 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1288 goto err;
1289 }
1290
1291 /* TLS does not like anon-DH with client cert */
1292 if (s->version > SSL3_VERSION)
1293 {
1294 l=s->s3->tmp.new_cipher->algorithms;
1295 if (l & SSL_aNULL)
1296 {
1297 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1298 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1299 goto err;
1300 }
1301 }
1302
1303 d=p=(unsigned char *)s->init_msg;
1304
1305 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1306 {
1307 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1308 goto err;
1309 }
1310
1311 /* get the certificate types */
1312 ctype_num= *(p++);
1313 if (ctype_num > SSL3_CT_NUMBER)
1314 ctype_num=SSL3_CT_NUMBER;
1315 for (i=0; i<ctype_num; i++)
1316 s->s3->tmp.ctype[i]= p[i];
1317 p+=ctype_num;
1318
1319 /* get the CA RDNs */
1320 n2s(p,llen);
1321 #if 0
1322 {
1323 FILE *out;
1324 out=fopen("/tmp/vsign.der","w");
1325 fwrite(p,1,llen,out);
1326 fclose(out);
1327 }
1328 #endif
1329
1330 if ((llen+ctype_num+2+1) != n)
1331 {
1332 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1333 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1334 goto err;
1335 }
1336
1337 for (nc=0; nc<llen; )
1338 {
1339 n2s(p,l);
1340 if ((l+nc+2) > llen)
1341 {
1342 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1343 goto cont; /* netscape bugs */
1344 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1345 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1346 goto err;
1347 }
1348
1349 q=p;
1350
1351 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1352 {
1353 /* If netscape tolerance is on, ignore errors */
1354 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1355 goto cont;
1356 else
1357 {
1358 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1359 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1360 goto err;
1361 }
1362 }
1363
1364 if (q != (p+l))
1365 {
1366 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1367 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1368 goto err;
1369 }
1370 if (!sk_X509_NAME_push(ca_sk,xn))
1371 {
1372 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1373 goto err;
1374 }
1375
1376 p+=l;
1377 nc+=l+2;
1378 }
1379
1380 if (0)
1381 {
1382 cont:
1383 ERR_clear_error();
1384 }
1385
1386 /* we should setup a certificate to return.... */
1387 s->s3->tmp.cert_req=1;
1388 s->s3->tmp.ctype_num=ctype_num;
1389 if (s->s3->tmp.ca_names != NULL)
1390 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1391 s->s3->tmp.ca_names=ca_sk;
1392 ca_sk=NULL;
1393
1394 ret=1;
1395 err:
1396 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1397 return(ret);
1398 }
1399
1400 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1401 {
1402 return(X509_NAME_cmp(*a,*b));
1403 }
1404
1405 static int ssl3_get_server_done(SSL *s)
1406 {
1407 int ok,ret=0;
1408 long n;
1409
1410 n=ssl3_get_message(s,
1411 SSL3_ST_CR_SRVR_DONE_A,
1412 SSL3_ST_CR_SRVR_DONE_B,
1413 SSL3_MT_SERVER_DONE,
1414 30, /* should be very small, like 0 :-) */
1415 &ok);
1416
1417 if (!ok) return((int)n);
1418 if (n > 0)
1419 {
1420 /* should contain no data */
1421 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1422 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1423 return -1;
1424 }
1425 ret=1;
1426 return(ret);
1427 }
1428
1429 static int ssl3_send_client_key_exchange(SSL *s)
1430 {
1431 unsigned char *p,*d;
1432 int n;
1433 unsigned long l;
1434 #ifndef OPENSSL_NO_RSA
1435 unsigned char *q;
1436 EVP_PKEY *pkey=NULL;
1437 #endif
1438 #ifndef OPENSSL_NO_KRB5
1439 KSSL_ERR kssl_err;
1440 #endif /* OPENSSL_NO_KRB5 */
1441
1442 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1443 {
1444 d=(unsigned char *)s->init_buf->data;
1445 p= &(d[4]);
1446
1447 l=s->s3->tmp.new_cipher->algorithms;
1448
1449 /* Fool emacs indentation */
1450 if (0) {}
1451 #ifndef OPENSSL_NO_RSA
1452 else if (l & SSL_kRSA)
1453 {
1454 RSA *rsa;
1455 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1456
1457 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1458 rsa=s->session->sess_cert->peer_rsa_tmp;
1459 else
1460 {
1461 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1462 if ((pkey == NULL) ||
1463 (pkey->type != EVP_PKEY_RSA) ||
1464 (pkey->pkey.rsa == NULL))
1465 {
1466 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1467 goto err;
1468 }
1469 rsa=pkey->pkey.rsa;
1470 EVP_PKEY_free(pkey);
1471 }
1472
1473 tmp_buf[0]=s->client_version>>8;
1474 tmp_buf[1]=s->client_version&0xff;
1475 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
1476 goto err;
1477
1478 s->session->master_key_length=sizeof tmp_buf;
1479
1480 q=p;
1481 /* Fix buf for TLS and beyond */
1482 if (s->version > SSL3_VERSION)
1483 p+=2;
1484 n=RSA_public_encrypt(sizeof tmp_buf,
1485 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1486 #ifdef PKCS1_CHECK
1487 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1488 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1489 #endif
1490 if (n <= 0)
1491 {
1492 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1493 goto err;
1494 }
1495
1496 /* Fix buf for TLS and beyond */
1497 if (s->version > SSL3_VERSION)
1498 {
1499 s2n(n,q);
1500 n+=2;
1501 }
1502
1503 s->session->master_key_length=
1504 s->method->ssl3_enc->generate_master_secret(s,
1505 s->session->master_key,
1506 tmp_buf,sizeof tmp_buf);
1507 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
1508 }
1509 #endif
1510 #ifndef OPENSSL_NO_KRB5
1511 else if (l & SSL_kKRB5)
1512 {
1513 krb5_error_code krb5rc;
1514 KSSL_CTX *kssl_ctx = s->kssl_ctx;
1515 /* krb5_data krb5_ap_req; */
1516 krb5_data *enc_ticket;
1517 krb5_data authenticator, *authp = NULL;
1518 EVP_CIPHER_CTX ciph_ctx;
1519 EVP_CIPHER *enc = NULL;
1520 unsigned char iv[EVP_MAX_IV_LENGTH];
1521 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1522 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
1523 + EVP_MAX_IV_LENGTH];
1524 int padl, outl = sizeof(epms);
1525
1526 EVP_CIPHER_CTX_init(&ciph_ctx);
1527
1528 #ifdef KSSL_DEBUG
1529 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
1530 l, SSL_kKRB5);
1531 #endif /* KSSL_DEBUG */
1532
1533 authp = NULL;
1534 #ifdef KRB5SENDAUTH
1535 if (KRB5SENDAUTH) authp = &authenticator;
1536 #endif /* KRB5SENDAUTH */
1537
1538 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
1539 &kssl_err);
1540 enc = kssl_map_enc(kssl_ctx->enctype);
1541 if (enc == NULL)
1542 goto err;
1543 #ifdef KSSL_DEBUG
1544 {
1545 printf("kssl_cget_tkt rtn %d\n", krb5rc);
1546 if (krb5rc && kssl_err.text)
1547 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
1548 }
1549 #endif /* KSSL_DEBUG */
1550
1551 if (krb5rc)
1552 {
1553 ssl3_send_alert(s,SSL3_AL_FATAL,
1554 SSL_AD_HANDSHAKE_FAILURE);
1555 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1556 kssl_err.reason);
1557 goto err;
1558 }
1559
1560 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
1561 ** in place of RFC 2712 KerberosWrapper, as in:
1562 **
1563 ** Send ticket (copy to *p, set n = length)
1564 ** n = krb5_ap_req.length;
1565 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
1566 ** if (krb5_ap_req.data)
1567 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
1568 **
1569 ** Now using real RFC 2712 KerberosWrapper
1570 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
1571 ** Note: 2712 "opaque" types are here replaced
1572 ** with a 2-byte length followed by the value.
1573 ** Example:
1574 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
1575 ** Where "xx xx" = length bytes. Shown here with
1576 ** optional authenticator omitted.
1577 */
1578
1579 /* KerberosWrapper.Ticket */
1580 s2n(enc_ticket->length,p);
1581 memcpy(p, enc_ticket->data, enc_ticket->length);
1582 p+= enc_ticket->length;
1583 n = enc_ticket->length + 2;
1584
1585 /* KerberosWrapper.Authenticator */
1586 if (authp && authp->length)
1587 {
1588 s2n(authp->length,p);
1589 memcpy(p, authp->data, authp->length);
1590 p+= authp->length;
1591 n+= authp->length + 2;
1592
1593 free(authp->data);
1594 authp->data = NULL;
1595 authp->length = 0;
1596 }
1597 else
1598 {
1599 s2n(0,p);/* null authenticator length */
1600 n+=2;
1601 }
1602
1603 if (RAND_bytes(tmp_buf,sizeof tmp_buf) <= 0)
1604 goto err;
1605
1606 /* 20010420 VRS. Tried it this way; failed.
1607 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
1608 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
1609 ** kssl_ctx->length);
1610 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
1611 */
1612
1613 memset(iv, 0, sizeof iv); /* per RFC 1510 */
1614 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
1615 kssl_ctx->key,iv);
1616 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
1617 sizeof tmp_buf);
1618 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
1619 outl += padl;
1620 if (outl > sizeof epms)
1621 {
1622 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1623 goto err;
1624 }
1625 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
1626
1627 /* KerberosWrapper.EncryptedPreMasterSecret */
1628 s2n(outl,p);
1629 memcpy(p, epms, outl);
1630 p+=outl;
1631 n+=outl + 2;
1632
1633 s->session->master_key_length=
1634 s->method->ssl3_enc->generate_master_secret(s,
1635 s->session->master_key,
1636 tmp_buf, sizeof tmp_buf);
1637
1638 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
1639 OPENSSL_cleanse(epms, outl);
1640 }
1641 #endif
1642 #ifndef OPENSSL_NO_DH
1643 else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1644 {
1645 DH *dh_srvr,*dh_clnt;
1646
1647 if (s->session->sess_cert->peer_dh_tmp != NULL)
1648 dh_srvr=s->session->sess_cert->peer_dh_tmp;
1649 else
1650 {
1651 /* we get them from the cert */
1652 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1653 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1654 goto err;
1655 }
1656
1657 /* generate a new random key */
1658 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1659 {
1660 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1661 goto err;
1662 }
1663 if (!DH_generate_key(dh_clnt))
1664 {
1665 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1666 goto err;
1667 }
1668
1669 /* use the 'p' output buffer for the DH key, but
1670 * make sure to clear it out afterwards */
1671
1672 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1673
1674 if (n <= 0)
1675 {
1676 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1677 goto err;
1678 }
1679
1680 /* generate master key from the result */
1681 s->session->master_key_length=
1682 s->method->ssl3_enc->generate_master_secret(s,
1683 s->session->master_key,p,n);
1684 /* clean up */
1685 memset(p,0,n);
1686
1687 /* send off the data */
1688 n=BN_num_bytes(dh_clnt->pub_key);
1689 s2n(n,p);
1690 BN_bn2bin(dh_clnt->pub_key,p);
1691 n+=2;
1692
1693 DH_free(dh_clnt);
1694
1695 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1696 }
1697 #endif
1698 else
1699 {
1700 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1701 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1702 goto err;
1703 }
1704
1705 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1706 l2n3(n,d);
1707
1708 s->state=SSL3_ST_CW_KEY_EXCH_B;
1709 /* number of bytes to write */
1710 s->init_num=n+4;
1711 s->init_off=0;
1712 }
1713
1714 /* SSL3_ST_CW_KEY_EXCH_B */
1715 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1716 err:
1717 return(-1);
1718 }
1719
1720 static int ssl3_send_client_verify(SSL *s)
1721 {
1722 unsigned char *p,*d;
1723 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1724 EVP_PKEY *pkey;
1725 #ifndef OPENSSL_NO_RSA
1726 unsigned u=0;
1727 #endif
1728 unsigned long n;
1729 #ifndef OPENSSL_NO_DSA
1730 int j;
1731 #endif
1732
1733 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1734 {
1735 d=(unsigned char *)s->init_buf->data;
1736 p= &(d[4]);
1737 pkey=s->cert->key->privatekey;
1738
1739 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
1740 &(data[MD5_DIGEST_LENGTH]));
1741
1742 #ifndef OPENSSL_NO_RSA
1743 if (pkey->type == EVP_PKEY_RSA)
1744 {
1745 s->method->ssl3_enc->cert_verify_mac(s,
1746 &(s->s3->finish_dgst1),&(data[0]));
1747 if (RSA_sign(NID_md5_sha1, data,
1748 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1749 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
1750 {
1751 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1752 goto err;
1753 }
1754 s2n(u,p);
1755 n=u+2;
1756 }
1757 else
1758 #endif
1759 #ifndef OPENSSL_NO_DSA
1760 if (pkey->type == EVP_PKEY_DSA)
1761 {
1762 if (!DSA_sign(pkey->save_type,
1763 &(data[MD5_DIGEST_LENGTH]),
1764 SHA_DIGEST_LENGTH,&(p[2]),
1765 (unsigned int *)&j,pkey->pkey.dsa))
1766 {
1767 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1768 goto err;
1769 }
1770 s2n(j,p);
1771 n=j+2;
1772 }
1773 else
1774 #endif
1775 {
1776 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
1777 goto err;
1778 }
1779 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
1780 l2n3(n,d);
1781
1782 s->state=SSL3_ST_CW_CERT_VRFY_B;
1783 s->init_num=(int)n+4;
1784 s->init_off=0;
1785 }
1786 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1787 err:
1788 return(-1);
1789 }
1790
1791 static int ssl3_send_client_certificate(SSL *s)
1792 {
1793 X509 *x509=NULL;
1794 EVP_PKEY *pkey=NULL;
1795 int i;
1796 unsigned long l;
1797
1798 if (s->state == SSL3_ST_CW_CERT_A)
1799 {
1800 if ((s->cert == NULL) ||
1801 (s->cert->key->x509 == NULL) ||
1802 (s->cert->key->privatekey == NULL))
1803 s->state=SSL3_ST_CW_CERT_B;
1804 else
1805 s->state=SSL3_ST_CW_CERT_C;
1806 }
1807
1808 /* We need to get a client cert */
1809 if (s->state == SSL3_ST_CW_CERT_B)
1810 {
1811 /* If we get an error, we need to
1812 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1813 * We then get retied later */
1814 i=0;
1815 if (s->ctx->client_cert_cb != NULL)
1816 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
1817 if (i < 0)
1818 {
1819 s->rwstate=SSL_X509_LOOKUP;
1820 return(-1);
1821 }
1822 s->rwstate=SSL_NOTHING;
1823 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1824 {
1825 s->state=SSL3_ST_CW_CERT_B;
1826 if ( !SSL_use_certificate(s,x509) ||
1827 !SSL_use_PrivateKey(s,pkey))
1828 i=0;
1829 }
1830 else if (i == 1)
1831 {
1832 i=0;
1833 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1834 }
1835
1836 if (x509 != NULL) X509_free(x509);
1837 if (pkey != NULL) EVP_PKEY_free(pkey);
1838 if (i == 0)
1839 {
1840 if (s->version == SSL3_VERSION)
1841 {
1842 s->s3->tmp.cert_req=0;
1843 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1844 return(1);
1845 }
1846 else
1847 {
1848 s->s3->tmp.cert_req=2;
1849 }
1850 }
1851
1852 /* Ok, we have a cert */
1853 s->state=SSL3_ST_CW_CERT_C;
1854 }
1855
1856 if (s->state == SSL3_ST_CW_CERT_C)
1857 {
1858 s->state=SSL3_ST_CW_CERT_D;
1859 l=ssl3_output_cert_chain(s,
1860 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
1861 s->init_num=(int)l;
1862 s->init_off=0;
1863 }
1864 /* SSL3_ST_CW_CERT_D */
1865 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1866 }
1867
1868 #define has_bits(i,m) (((i)&(m)) == (m))
1869
1870 static int ssl3_check_cert_and_algorithm(SSL *s)
1871 {
1872 int i,idx;
1873 long algs;
1874 EVP_PKEY *pkey=NULL;
1875 SESS_CERT *sc;
1876 #ifndef OPENSSL_NO_RSA
1877 RSA *rsa;
1878 #endif
1879 #ifndef OPENSSL_NO_DH
1880 DH *dh;
1881 #endif
1882
1883 sc=s->session->sess_cert;
1884
1885 if (sc == NULL)
1886 {
1887 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
1888 goto err;
1889 }
1890
1891 algs=s->s3->tmp.new_cipher->algorithms;
1892
1893 /* we don't have a certificate */
1894 if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5))
1895 return(1);
1896
1897 #ifndef OPENSSL_NO_RSA
1898 rsa=s->session->sess_cert->peer_rsa_tmp;
1899 #endif
1900 #ifndef OPENSSL_NO_DH
1901 dh=s->session->sess_cert->peer_dh_tmp;
1902 #endif
1903
1904 /* This is the passed certificate */
1905
1906 idx=sc->peer_cert_type;
1907 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
1908 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
1909 EVP_PKEY_free(pkey);
1910
1911
1912 /* Check that we have a certificate if we require one */
1913 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
1914 {
1915 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
1916 goto f_err;
1917 }
1918 #ifndef OPENSSL_NO_DSA
1919 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
1920 {
1921 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
1922 goto f_err;
1923 }
1924 #endif
1925 #ifndef OPENSSL_NO_RSA
1926 if ((algs & SSL_kRSA) &&
1927 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
1928 {
1929 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
1930 goto f_err;
1931 }
1932 #endif
1933 #ifndef OPENSSL_NO_DH
1934 if ((algs & SSL_kEDH) &&
1935 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
1936 {
1937 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
1938 goto f_err;
1939 }
1940 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
1941 {
1942 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
1943 goto f_err;
1944 }
1945 #ifndef OPENSSL_NO_DSA
1946 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
1947 {
1948 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
1949 goto f_err;
1950 }
1951 #endif
1952 #endif
1953
1954 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
1955 {
1956 #ifndef OPENSSL_NO_RSA
1957 if (algs & SSL_kRSA)
1958 {
1959 if (rsa == NULL
1960 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
1961 {
1962 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
1963 goto f_err;
1964 }
1965 }
1966 else
1967 #endif
1968 #ifndef OPENSSL_NO_DH
1969 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1970 {
1971 if (dh == NULL
1972 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
1973 {
1974 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
1975 goto f_err;
1976 }
1977 }
1978 else
1979 #endif
1980 {
1981 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1982 goto f_err;
1983 }
1984 }
1985 return(1);
1986 f_err:
1987 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1988 err:
1989 return(0);
1990 }
1991
DragonFly BSD