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[thirdparty/openssl.git] / ssl / s3_clnt.c
1 /* ssl/s3_clnt.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58 /* ====================================================================
59 * Copyright (c) 1998-2002 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
121 static SSL_METHOD *ssl3_get_client_method(int ver);
122 static int ssl3_client_hello(SSL *s);
123 static int ssl3_get_server_hello(SSL *s);
124 static int ssl3_get_certificate_request(SSL *s);
125 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
126 static int ssl3_get_server_done(SSL *s);
127 static int ssl3_send_client_verify(SSL *s);
128 static int ssl3_send_client_certificate(SSL *s);
129 static int ssl3_send_client_key_exchange(SSL *s);
130 static int ssl3_get_key_exchange(SSL *s);
131 static int ssl3_get_server_certificate(SSL *s);
132 static int ssl3_check_cert_and_algorithm(SSL *s);
133 static SSL_METHOD *ssl3_get_client_method(int ver)
134 {
135 if (ver == SSL3_VERSION)
136 return(SSLv3_client_method());
137 else
138 return(NULL);
139 }
140
141 SSL_METHOD *SSLv3_client_method(void)
142 {
143 static int init=1;
144 static SSL_METHOD SSLv3_client_data;
145
146 if (init)
147 {
148 init=0;
149 memcpy((char *)&SSLv3_client_data,(char *)sslv3_base_method(),
150 sizeof(SSL_METHOD));
151 SSLv3_client_data.ssl_connect=ssl3_connect;
152 SSLv3_client_data.get_ssl_method=ssl3_get_client_method;
153 }
154 return(&SSLv3_client_data);
155 }
156
157 int ssl3_connect(SSL *s)
158 {
159 BUF_MEM *buf;
160 unsigned long Time=time(NULL),l;
161 long num1;
162 void (*cb)(const SSL *ssl,int type,int val)=NULL;
163 int ret= -1;
164 int new_state,state,skip=0;;
165
166 RAND_add(&Time,sizeof(Time),0);
167 ERR_clear_error();
168 clear_sys_error();
169
170 if (s->info_callback != NULL)
171 cb=s->info_callback;
172 else if (s->ctx->info_callback != NULL)
173 cb=s->ctx->info_callback;
174
175 s->in_handshake++;
176 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
177
178 for (;;)
179 {
180 state=s->state;
181
182 switch(s->state)
183 {
184 case SSL_ST_RENEGOTIATE:
185 s->new_session=1;
186 s->state=SSL_ST_CONNECT;
187 s->ctx->stats.sess_connect_renegotiate++;
188 /* break */
189 case SSL_ST_BEFORE:
190 case SSL_ST_CONNECT:
191 case SSL_ST_BEFORE|SSL_ST_CONNECT:
192 case SSL_ST_OK|SSL_ST_CONNECT:
193
194 s->server=0;
195 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
196
197 if ((s->version & 0xff00 ) != 0x0300)
198 {
199 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
200 ret = -1;
201 goto end;
202 }
203
204 /* s->version=SSL3_VERSION; */
205 s->type=SSL_ST_CONNECT;
206
207 if (s->init_buf == NULL)
208 {
209 if ((buf=BUF_MEM_new()) == NULL)
210 {
211 ret= -1;
212 goto end;
213 }
214 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
215 {
216 ret= -1;
217 goto end;
218 }
219 s->init_buf=buf;
220 }
221
222 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
223
224 /* setup buffing BIO */
225 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
226
227 /* don't push the buffering BIO quite yet */
228
229 ssl3_init_finished_mac(s);
230
231 s->state=SSL3_ST_CW_CLNT_HELLO_A;
232 s->ctx->stats.sess_connect++;
233 s->init_num=0;
234 break;
235
236 case SSL3_ST_CW_CLNT_HELLO_A:
237 case SSL3_ST_CW_CLNT_HELLO_B:
238
239 s->shutdown=0;
240 ret=ssl3_client_hello(s);
241 if (ret <= 0) goto end;
242 s->state=SSL3_ST_CR_SRVR_HELLO_A;
243 s->init_num=0;
244
245 /* turn on buffering for the next lot of output */
246 if (s->bbio != s->wbio)
247 s->wbio=BIO_push(s->bbio,s->wbio);
248
249 break;
250
251 case SSL3_ST_CR_SRVR_HELLO_A:
252 case SSL3_ST_CR_SRVR_HELLO_B:
253 ret=ssl3_get_server_hello(s);
254 if (ret <= 0) goto end;
255 if (s->hit)
256 s->state=SSL3_ST_CR_FINISHED_A;
257 else
258 s->state=SSL3_ST_CR_CERT_A;
259 s->init_num=0;
260 break;
261
262 case SSL3_ST_CR_CERT_A:
263 case SSL3_ST_CR_CERT_B:
264 /* Check if it is anon DH */
265 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
266 {
267 ret=ssl3_get_server_certificate(s);
268 if (ret <= 0) goto end;
269 }
270 else
271 skip=1;
272 s->state=SSL3_ST_CR_KEY_EXCH_A;
273 s->init_num=0;
274 break;
275
276 case SSL3_ST_CR_KEY_EXCH_A:
277 case SSL3_ST_CR_KEY_EXCH_B:
278 ret=ssl3_get_key_exchange(s);
279 if (ret <= 0) goto end;
280 s->state=SSL3_ST_CR_CERT_REQ_A;
281 s->init_num=0;
282
283 /* at this point we check that we have the
284 * required stuff from the server */
285 if (!ssl3_check_cert_and_algorithm(s))
286 {
287 ret= -1;
288 goto end;
289 }
290 break;
291
292 case SSL3_ST_CR_CERT_REQ_A:
293 case SSL3_ST_CR_CERT_REQ_B:
294 ret=ssl3_get_certificate_request(s);
295 if (ret <= 0) goto end;
296 s->state=SSL3_ST_CR_SRVR_DONE_A;
297 s->init_num=0;
298 break;
299
300 case SSL3_ST_CR_SRVR_DONE_A:
301 case SSL3_ST_CR_SRVR_DONE_B:
302 ret=ssl3_get_server_done(s);
303 if (ret <= 0) goto end;
304 if (s->s3->tmp.cert_req)
305 s->state=SSL3_ST_CW_CERT_A;
306 else
307 s->state=SSL3_ST_CW_KEY_EXCH_A;
308 s->init_num=0;
309
310 break;
311
312 case SSL3_ST_CW_CERT_A:
313 case SSL3_ST_CW_CERT_B:
314 case SSL3_ST_CW_CERT_C:
315 case SSL3_ST_CW_CERT_D:
316 ret=ssl3_send_client_certificate(s);
317 if (ret <= 0) goto end;
318 s->state=SSL3_ST_CW_KEY_EXCH_A;
319 s->init_num=0;
320 break;
321
322 case SSL3_ST_CW_KEY_EXCH_A:
323 case SSL3_ST_CW_KEY_EXCH_B:
324 ret=ssl3_send_client_key_exchange(s);
325 if (ret <= 0) goto end;
326 l=s->s3->tmp.new_cipher->algorithms;
327 /* EAY EAY EAY need to check for DH fix cert
328 * sent back */
329 /* For TLS, cert_req is set to 2, so a cert chain
330 * of nothing is sent, but no verify packet is sent */
331 if (s->s3->tmp.cert_req == 1)
332 {
333 s->state=SSL3_ST_CW_CERT_VRFY_A;
334 }
335 else
336 {
337 s->state=SSL3_ST_CW_CHANGE_A;
338 s->s3->change_cipher_spec=0;
339 }
340
341 s->init_num=0;
342 break;
343
344 case SSL3_ST_CW_CERT_VRFY_A:
345 case SSL3_ST_CW_CERT_VRFY_B:
346 ret=ssl3_send_client_verify(s);
347 if (ret <= 0) goto end;
348 s->state=SSL3_ST_CW_CHANGE_A;
349 s->init_num=0;
350 s->s3->change_cipher_spec=0;
351 break;
352
353 case SSL3_ST_CW_CHANGE_A:
354 case SSL3_ST_CW_CHANGE_B:
355 ret=ssl3_send_change_cipher_spec(s,
356 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
357 if (ret <= 0) goto end;
358 s->state=SSL3_ST_CW_FINISHED_A;
359 s->init_num=0;
360
361 s->session->cipher=s->s3->tmp.new_cipher;
362 if (s->s3->tmp.new_compression == NULL)
363 s->session->compress_meth=0;
364 else
365 s->session->compress_meth=
366 s->s3->tmp.new_compression->id;
367 if (!s->method->ssl3_enc->setup_key_block(s))
368 {
369 ret= -1;
370 goto end;
371 }
372
373 if (!s->method->ssl3_enc->change_cipher_state(s,
374 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
375 {
376 ret= -1;
377 goto end;
378 }
379
380 break;
381
382 case SSL3_ST_CW_FINISHED_A:
383 case SSL3_ST_CW_FINISHED_B:
384 ret=ssl3_send_finished(s,
385 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
386 s->method->ssl3_enc->client_finished_label,
387 s->method->ssl3_enc->client_finished_label_len);
388 if (ret <= 0) goto end;
389 s->state=SSL3_ST_CW_FLUSH;
390
391 /* clear flags */
392 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
393 if (s->hit)
394 {
395 s->s3->tmp.next_state=SSL_ST_OK;
396 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
397 {
398 s->state=SSL_ST_OK;
399 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
400 s->s3->delay_buf_pop_ret=0;
401 }
402 }
403 else
404 {
405 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
406 }
407 s->init_num=0;
408 break;
409
410 case SSL3_ST_CR_FINISHED_A:
411 case SSL3_ST_CR_FINISHED_B:
412
413 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
414 SSL3_ST_CR_FINISHED_B);
415 if (ret <= 0) goto end;
416
417 if (s->hit)
418 s->state=SSL3_ST_CW_CHANGE_A;
419 else
420 s->state=SSL_ST_OK;
421 s->init_num=0;
422 break;
423
424 case SSL3_ST_CW_FLUSH:
425 /* number of bytes to be flushed */
426 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
427 if (num1 > 0)
428 {
429 s->rwstate=SSL_WRITING;
430 num1=BIO_flush(s->wbio);
431 if (num1 <= 0) { ret= -1; goto end; }
432 s->rwstate=SSL_NOTHING;
433 }
434
435 s->state=s->s3->tmp.next_state;
436 break;
437
438 case SSL_ST_OK:
439 /* clean a few things up */
440 ssl3_cleanup_key_block(s);
441
442 if (s->init_buf != NULL)
443 {
444 BUF_MEM_free(s->init_buf);
445 s->init_buf=NULL;
446 }
447
448 /* If we are not 'joining' the last two packets,
449 * remove the buffering now */
450 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
451 ssl_free_wbio_buffer(s);
452 /* else do it later in ssl3_write */
453
454 s->init_num=0;
455 s->new_session=0;
456
457 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
458 if (s->hit) s->ctx->stats.sess_hit++;
459
460 ret=1;
461 /* s->server=0; */
462 s->handshake_func=ssl3_connect;
463 s->ctx->stats.sess_connect_good++;
464
465 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
466
467 goto end;
468 /* break; */
469
470 default:
471 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
472 ret= -1;
473 goto end;
474 /* break; */
475 }
476
477 /* did we do anything */
478 if (!s->s3->tmp.reuse_message && !skip)
479 {
480 if (s->debug)
481 {
482 if ((ret=BIO_flush(s->wbio)) <= 0)
483 goto end;
484 }
485
486 if ((cb != NULL) && (s->state != state))
487 {
488 new_state=s->state;
489 s->state=state;
490 cb(s,SSL_CB_CONNECT_LOOP,1);
491 s->state=new_state;
492 }
493 }
494 skip=0;
495 }
496 end:
497 s->in_handshake--;
498 if (cb != NULL)
499 cb(s,SSL_CB_CONNECT_EXIT,ret);
500 return(ret);
501 }
502
503
504 static int ssl3_client_hello(SSL *s)
505 {
506 unsigned char *buf;
507 unsigned char *p,*d;
508 int i,j;
509 unsigned long Time,l;
510 SSL_COMP *comp;
511
512 buf=(unsigned char *)s->init_buf->data;
513 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
514 {
515 if ((s->session == NULL) ||
516 (s->session->ssl_version != s->version) ||
517 (s->session->not_resumable))
518 {
519 if (!ssl_get_new_session(s,0))
520 goto err;
521 }
522 /* else use the pre-loaded session */
523
524 p=s->s3->client_random;
525 Time=time(NULL); /* Time */
526 l2n(Time,p);
527 RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
528
529 /* Do the message type and length last */
530 d=p= &(buf[4]);
531
532 *(p++)=s->version>>8;
533 *(p++)=s->version&0xff;
534 s->client_version=s->version;
535
536 /* Random stuff */
537 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
538 p+=SSL3_RANDOM_SIZE;
539
540 /* Session ID */
541 if (s->new_session)
542 i=0;
543 else
544 i=s->session->session_id_length;
545 *(p++)=i;
546 if (i != 0)
547 {
548 memcpy(p,s->session->session_id,i);
549 p+=i;
550 }
551
552 /* Ciphers supported */
553 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]));
554 if (i == 0)
555 {
556 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
557 goto err;
558 }
559 s2n(i,p);
560 p+=i;
561
562 /* COMPRESSION */
563 if (s->ctx->comp_methods == NULL)
564 j=0;
565 else
566 j=sk_SSL_COMP_num(s->ctx->comp_methods);
567 *(p++)=1+j;
568 for (i=0; i<j; i++)
569 {
570 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
571 *(p++)=comp->id;
572 }
573 *(p++)=0; /* Add the NULL method */
574
575 l=(p-d);
576 d=buf;
577 *(d++)=SSL3_MT_CLIENT_HELLO;
578 l2n3(l,d);
579
580 s->state=SSL3_ST_CW_CLNT_HELLO_B;
581 /* number of bytes to write */
582 s->init_num=p-buf;
583 s->init_off=0;
584 }
585
586 /* SSL3_ST_CW_CLNT_HELLO_B */
587 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
588 err:
589 return(-1);
590 }
591
592 static int ssl3_get_server_hello(SSL *s)
593 {
594 STACK_OF(SSL_CIPHER) *sk;
595 SSL_CIPHER *c;
596 unsigned char *p,*d;
597 int i,al,ok;
598 unsigned int j;
599 long n;
600 SSL_COMP *comp;
601
602 n=ssl3_get_message(s,
603 SSL3_ST_CR_SRVR_HELLO_A,
604 SSL3_ST_CR_SRVR_HELLO_B,
605 SSL3_MT_SERVER_HELLO,
606 300, /* ?? */
607 &ok);
608
609 if (!ok) return((int)n);
610 d=p=(unsigned char *)s->init_msg;
611
612 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
613 {
614 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
615 s->version=(s->version&0xff00)|p[1];
616 al=SSL_AD_PROTOCOL_VERSION;
617 goto f_err;
618 }
619 p+=2;
620
621 /* load the server hello data */
622 /* load the server random */
623 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
624 p+=SSL3_RANDOM_SIZE;
625
626 /* get the session-id */
627 j= *(p++);
628
629 if ((j != 0) && (j != SSL3_SESSION_ID_SIZE))
630 {
631 /* SSLref returns 16 :-( */
632 if (j < SSL2_SSL_SESSION_ID_LENGTH)
633 {
634 al=SSL_AD_ILLEGAL_PARAMETER;
635 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_SHORT);
636 goto f_err;
637 }
638 }
639 if (j != 0 && j == s->session->session_id_length
640 && memcmp(p,s->session->session_id,j) == 0)
641 {
642 if(s->sid_ctx_length != s->session->sid_ctx_length
643 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
644 {
645 al=SSL_AD_ILLEGAL_PARAMETER;
646 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
647 goto f_err;
648 }
649 s->hit=1;
650 }
651 else /* a miss or crap from the other end */
652 {
653 /* If we were trying for session-id reuse, make a new
654 * SSL_SESSION so we don't stuff up other people */
655 s->hit=0;
656 if (s->session->session_id_length > 0)
657 {
658 if (!ssl_get_new_session(s,0))
659 {
660 al=SSL_AD_INTERNAL_ERROR;
661 goto f_err;
662 }
663 }
664 s->session->session_id_length=j;
665 memcpy(s->session->session_id,p,j); /* j could be 0 */
666 }
667 p+=j;
668 c=ssl_get_cipher_by_char(s,p);
669 if (c == NULL)
670 {
671 /* unknown cipher */
672 al=SSL_AD_ILLEGAL_PARAMETER;
673 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
674 goto f_err;
675 }
676 p+=ssl_put_cipher_by_char(s,NULL,NULL);
677
678 sk=ssl_get_ciphers_by_id(s);
679 i=sk_SSL_CIPHER_find(sk,c);
680 if (i < 0)
681 {
682 /* we did not say we would use this cipher */
683 al=SSL_AD_ILLEGAL_PARAMETER;
684 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
685 goto f_err;
686 }
687
688 if (s->hit && (s->session->cipher != c))
689 {
690 if (!(s->options &
691 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
692 {
693 al=SSL_AD_ILLEGAL_PARAMETER;
694 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
695 goto f_err;
696 }
697 }
698 s->s3->tmp.new_cipher=c;
699
700 /* lets get the compression algorithm */
701 /* COMPRESSION */
702 j= *(p++);
703 if (j == 0)
704 comp=NULL;
705 else
706 comp=ssl3_comp_find(s->ctx->comp_methods,j);
707
708 if ((j != 0) && (comp == NULL))
709 {
710 al=SSL_AD_ILLEGAL_PARAMETER;
711 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
712 goto f_err;
713 }
714 else
715 {
716 s->s3->tmp.new_compression=comp;
717 }
718
719 if (p != (d+n))
720 {
721 /* wrong packet length */
722 al=SSL_AD_DECODE_ERROR;
723 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
724 goto err;
725 }
726
727 return(1);
728 f_err:
729 ssl3_send_alert(s,SSL3_AL_FATAL,al);
730 err:
731 return(-1);
732 }
733
734 static int ssl3_get_server_certificate(SSL *s)
735 {
736 int al,i,ok,ret= -1;
737 unsigned long n,nc,llen,l;
738 X509 *x=NULL;
739 unsigned char *p,*d,*q;
740 STACK_OF(X509) *sk=NULL;
741 SESS_CERT *sc;
742 EVP_PKEY *pkey=NULL;
743 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
744
745 n=ssl3_get_message(s,
746 SSL3_ST_CR_CERT_A,
747 SSL3_ST_CR_CERT_B,
748 -1,
749 s->max_cert_list,
750 &ok);
751
752 if (!ok) return((int)n);
753
754 if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE)
755 {
756 s->s3->tmp.reuse_message=1;
757 return(1);
758 }
759
760 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
761 {
762 al=SSL_AD_UNEXPECTED_MESSAGE;
763 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
764 goto f_err;
765 }
766 d=p=(unsigned char *)s->init_msg;
767
768 if ((sk=sk_X509_new_null()) == NULL)
769 {
770 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
771 goto err;
772 }
773
774 n2l3(p,llen);
775 if (llen+3 != n)
776 {
777 al=SSL_AD_DECODE_ERROR;
778 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
779 goto f_err;
780 }
781 for (nc=0; nc<llen; )
782 {
783 n2l3(p,l);
784 if ((l+nc+3) > llen)
785 {
786 al=SSL_AD_DECODE_ERROR;
787 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
788 goto f_err;
789 }
790
791 q=p;
792 x=d2i_X509(NULL,&q,l);
793 if (x == NULL)
794 {
795 al=SSL_AD_BAD_CERTIFICATE;
796 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
797 goto f_err;
798 }
799 if (q != (p+l))
800 {
801 al=SSL_AD_DECODE_ERROR;
802 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
803 goto f_err;
804 }
805 if (!sk_X509_push(sk,x))
806 {
807 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
808 goto err;
809 }
810 x=NULL;
811 nc+=l+3;
812 p=q;
813 }
814
815 i=ssl_verify_cert_chain(s,sk);
816 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i)
817 #ifndef OPENSSL_NO_KRB5
818 && (s->s3->tmp.new_cipher->algorithms & (SSL_MKEY_MASK|SSL_AUTH_MASK))
819 != (SSL_aKRB5|SSL_kKRB5)
820 #endif /* OPENSSL_NO_KRB5 */
821 )
822 {
823 al=ssl_verify_alarm_type(s->verify_result);
824 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
825 goto f_err;
826 }
827 ERR_clear_error(); /* but we keep s->verify_result */
828
829 sc=ssl_sess_cert_new();
830 if (sc == NULL) goto err;
831
832 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
833 s->session->sess_cert=sc;
834
835 sc->cert_chain=sk;
836 /* Inconsistency alert: cert_chain does include the peer's
837 * certificate, which we don't include in s3_srvr.c */
838 x=sk_X509_value(sk,0);
839 sk=NULL;
840 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
841
842 pkey=X509_get_pubkey(x);
843
844 /* VRS: allow null cert if auth == KRB5 */
845 need_cert = ((s->s3->tmp.new_cipher->algorithms
846 & (SSL_MKEY_MASK|SSL_AUTH_MASK))
847 == (SSL_aKRB5|SSL_kKRB5))? 0: 1;
848
849 #ifdef KSSL_DEBUG
850 printf("pkey,x = %p, %p\n", pkey,x);
851 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
852 printf("cipher, alg, nc = %s, %lx, %d\n", s->s3->tmp.new_cipher->name,
853 s->s3->tmp.new_cipher->algorithms, need_cert);
854 #endif /* KSSL_DEBUG */
855
856 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
857 {
858 x=NULL;
859 al=SSL3_AL_FATAL;
860 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
861 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
862 goto f_err;
863 }
864
865 i=ssl_cert_type(x,pkey);
866 if (need_cert && i < 0)
867 {
868 x=NULL;
869 al=SSL3_AL_FATAL;
870 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
871 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
872 goto f_err;
873 }
874
875 if (need_cert)
876 {
877 sc->peer_cert_type=i;
878 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
879 /* Why would the following ever happen?
880 * We just created sc a couple of lines ago. */
881 if (sc->peer_pkeys[i].x509 != NULL)
882 X509_free(sc->peer_pkeys[i].x509);
883 sc->peer_pkeys[i].x509=x;
884 sc->peer_key= &(sc->peer_pkeys[i]);
885
886 if (s->session->peer != NULL)
887 X509_free(s->session->peer);
888 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
889 s->session->peer=x;
890 }
891 else
892 {
893 sc->peer_cert_type=i;
894 sc->peer_key= NULL;
895
896 if (s->session->peer != NULL)
897 X509_free(s->session->peer);
898 s->session->peer=NULL;
899 }
900 s->session->verify_result = s->verify_result;
901
902 x=NULL;
903 ret=1;
904
905 if (0)
906 {
907 f_err:
908 ssl3_send_alert(s,SSL3_AL_FATAL,al);
909 }
910 err:
911 EVP_PKEY_free(pkey);
912 X509_free(x);
913 sk_X509_pop_free(sk,X509_free);
914 return(ret);
915 }
916
917 static int ssl3_get_key_exchange(SSL *s)
918 {
919 #ifndef OPENSSL_NO_RSA
920 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
921 #endif
922 EVP_MD_CTX md_ctx;
923 unsigned char *param,*p;
924 int al,i,j,param_len,ok;
925 long n,alg;
926 EVP_PKEY *pkey=NULL;
927 #ifndef OPENSSL_NO_RSA
928 RSA *rsa=NULL;
929 #endif
930 #ifndef OPENSSL_NO_DH
931 DH *dh=NULL;
932 #endif
933
934 /* use same message size as in ssl3_get_certificate_request()
935 * as ServerKeyExchange message may be skipped */
936 n=ssl3_get_message(s,
937 SSL3_ST_CR_KEY_EXCH_A,
938 SSL3_ST_CR_KEY_EXCH_B,
939 -1,
940 s->max_cert_list,
941 &ok);
942
943 if (!ok) return((int)n);
944
945 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
946 {
947 s->s3->tmp.reuse_message=1;
948 return(1);
949 }
950
951 param=p=(unsigned char *)s->init_msg;
952
953 if (s->session->sess_cert != NULL)
954 {
955 #ifndef OPENSSL_NO_RSA
956 if (s->session->sess_cert->peer_rsa_tmp != NULL)
957 {
958 RSA_free(s->session->sess_cert->peer_rsa_tmp);
959 s->session->sess_cert->peer_rsa_tmp=NULL;
960 }
961 #endif
962 #ifndef OPENSSL_NO_DH
963 if (s->session->sess_cert->peer_dh_tmp)
964 {
965 DH_free(s->session->sess_cert->peer_dh_tmp);
966 s->session->sess_cert->peer_dh_tmp=NULL;
967 }
968 #endif
969 }
970 else
971 {
972 s->session->sess_cert=ssl_sess_cert_new();
973 }
974
975 param_len=0;
976 alg=s->s3->tmp.new_cipher->algorithms;
977 EVP_MD_CTX_init(&md_ctx);
978
979 #ifndef OPENSSL_NO_RSA
980 if (alg & SSL_kRSA)
981 {
982 if ((rsa=RSA_new()) == NULL)
983 {
984 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
985 goto err;
986 }
987 n2s(p,i);
988 param_len=i+2;
989 if (param_len > n)
990 {
991 al=SSL_AD_DECODE_ERROR;
992 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
993 goto f_err;
994 }
995 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
996 {
997 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
998 goto err;
999 }
1000 p+=i;
1001
1002 n2s(p,i);
1003 param_len+=i+2;
1004 if (param_len > n)
1005 {
1006 al=SSL_AD_DECODE_ERROR;
1007 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1008 goto f_err;
1009 }
1010 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1011 {
1012 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1013 goto err;
1014 }
1015 p+=i;
1016 n-=param_len;
1017
1018 /* this should be because we are using an export cipher */
1019 if (alg & SSL_aRSA)
1020 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1021 else
1022 {
1023 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1024 goto err;
1025 }
1026 s->session->sess_cert->peer_rsa_tmp=rsa;
1027 rsa=NULL;
1028 }
1029 #else /* OPENSSL_NO_RSA */
1030 if (0)
1031 ;
1032 #endif
1033 #ifndef OPENSSL_NO_DH
1034 else if (alg & SSL_kEDH)
1035 {
1036 if ((dh=DH_new()) == NULL)
1037 {
1038 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1039 goto err;
1040 }
1041 n2s(p,i);
1042 param_len=i+2;
1043 if (param_len > n)
1044 {
1045 al=SSL_AD_DECODE_ERROR;
1046 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1047 goto f_err;
1048 }
1049 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1050 {
1051 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1052 goto err;
1053 }
1054 p+=i;
1055
1056 n2s(p,i);
1057 param_len+=i+2;
1058 if (param_len > n)
1059 {
1060 al=SSL_AD_DECODE_ERROR;
1061 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1062 goto f_err;
1063 }
1064 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1065 {
1066 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1067 goto err;
1068 }
1069 p+=i;
1070
1071 n2s(p,i);
1072 param_len+=i+2;
1073 if (param_len > n)
1074 {
1075 al=SSL_AD_DECODE_ERROR;
1076 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1077 goto f_err;
1078 }
1079 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1080 {
1081 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1082 goto err;
1083 }
1084 p+=i;
1085 n-=param_len;
1086
1087 #ifndef OPENSSL_NO_RSA
1088 if (alg & SSL_aRSA)
1089 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1090 #else
1091 if (0)
1092 ;
1093 #endif
1094 #ifndef OPENSSL_NO_DSA
1095 else if (alg & SSL_aDSS)
1096 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1097 #endif
1098 /* else anonymous DH, so no certificate or pkey. */
1099
1100 s->session->sess_cert->peer_dh_tmp=dh;
1101 dh=NULL;
1102 }
1103 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
1104 {
1105 al=SSL_AD_ILLEGAL_PARAMETER;
1106 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1107 goto f_err;
1108 }
1109 #endif /* !OPENSSL_NO_DH */
1110 if (alg & SSL_aFZA)
1111 {
1112 al=SSL_AD_HANDSHAKE_FAILURE;
1113 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1114 goto f_err;
1115 }
1116
1117
1118 /* p points to the next byte, there are 'n' bytes left */
1119
1120
1121 /* if it was signed, check the signature */
1122 if (pkey != NULL)
1123 {
1124 n2s(p,i);
1125 n-=2;
1126 j=EVP_PKEY_size(pkey);
1127
1128 if ((i != n) || (n > j) || (n <= 0))
1129 {
1130 /* wrong packet length */
1131 al=SSL_AD_DECODE_ERROR;
1132 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1133 goto f_err;
1134 }
1135
1136 #ifndef OPENSSL_NO_RSA
1137 if (pkey->type == EVP_PKEY_RSA)
1138 {
1139 int num;
1140
1141 j=0;
1142 q=md_buf;
1143 for (num=2; num > 0; num--)
1144 {
1145 EVP_DigestInit_ex(&md_ctx,(num == 2)
1146 ?s->ctx->md5:s->ctx->sha1, NULL);
1147 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1148 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1149 EVP_DigestUpdate(&md_ctx,param,param_len);
1150 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1151 q+=i;
1152 j+=i;
1153 }
1154 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1155 pkey->pkey.rsa);
1156 if (i < 0)
1157 {
1158 al=SSL_AD_DECRYPT_ERROR;
1159 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1160 goto f_err;
1161 }
1162 if (i == 0)
1163 {
1164 /* bad signature */
1165 al=SSL_AD_DECRYPT_ERROR;
1166 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1167 goto f_err;
1168 }
1169 }
1170 else
1171 #endif
1172 #ifndef OPENSSL_NO_DSA
1173 if (pkey->type == EVP_PKEY_DSA)
1174 {
1175 /* lets do DSS */
1176 EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL);
1177 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1178 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1179 EVP_VerifyUpdate(&md_ctx,param,param_len);
1180 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1181 {
1182 /* bad signature */
1183 al=SSL_AD_DECRYPT_ERROR;
1184 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1185 goto f_err;
1186 }
1187 }
1188 else
1189 #endif
1190 {
1191 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1192 goto err;
1193 }
1194 }
1195 else
1196 {
1197 /* still data left over */
1198 if (!(alg & SSL_aNULL))
1199 {
1200 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1201 goto err;
1202 }
1203 if (n != 0)
1204 {
1205 al=SSL_AD_DECODE_ERROR;
1206 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1207 goto f_err;
1208 }
1209 }
1210 EVP_PKEY_free(pkey);
1211 EVP_MD_CTX_cleanup(&md_ctx);
1212 return(1);
1213 f_err:
1214 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1215 err:
1216 EVP_PKEY_free(pkey);
1217 #ifndef OPENSSL_NO_RSA
1218 if (rsa != NULL)
1219 RSA_free(rsa);
1220 #endif
1221 #ifndef OPENSSL_NO_DH
1222 if (dh != NULL)
1223 DH_free(dh);
1224 #endif
1225 EVP_MD_CTX_cleanup(&md_ctx);
1226 return(-1);
1227 }
1228
1229 static int ssl3_get_certificate_request(SSL *s)
1230 {
1231 int ok,ret=0;
1232 unsigned long n,nc,l;
1233 unsigned int llen,ctype_num,i;
1234 X509_NAME *xn=NULL;
1235 unsigned char *p,*d,*q;
1236 STACK_OF(X509_NAME) *ca_sk=NULL;
1237
1238 n=ssl3_get_message(s,
1239 SSL3_ST_CR_CERT_REQ_A,
1240 SSL3_ST_CR_CERT_REQ_B,
1241 -1,
1242 s->max_cert_list,
1243 &ok);
1244
1245 if (!ok) return((int)n);
1246
1247 s->s3->tmp.cert_req=0;
1248
1249 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1250 {
1251 s->s3->tmp.reuse_message=1;
1252 return(1);
1253 }
1254
1255 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1256 {
1257 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1258 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1259 goto err;
1260 }
1261
1262 /* TLS does not like anon-DH with client cert */
1263 if (s->version > SSL3_VERSION)
1264 {
1265 l=s->s3->tmp.new_cipher->algorithms;
1266 if (l & SSL_aNULL)
1267 {
1268 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1269 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1270 goto err;
1271 }
1272 }
1273
1274 d=p=(unsigned char *)s->init_msg;
1275
1276 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1277 {
1278 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1279 goto err;
1280 }
1281
1282 /* get the certificate types */
1283 ctype_num= *(p++);
1284 if (ctype_num > SSL3_CT_NUMBER)
1285 ctype_num=SSL3_CT_NUMBER;
1286 for (i=0; i<ctype_num; i++)
1287 s->s3->tmp.ctype[i]= p[i];
1288 p+=ctype_num;
1289
1290 /* get the CA RDNs */
1291 n2s(p,llen);
1292 #if 0
1293 {
1294 FILE *out;
1295 out=fopen("/tmp/vsign.der","w");
1296 fwrite(p,1,llen,out);
1297 fclose(out);
1298 }
1299 #endif
1300
1301 if ((llen+ctype_num+2+1) != n)
1302 {
1303 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1304 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1305 goto err;
1306 }
1307
1308 for (nc=0; nc<llen; )
1309 {
1310 n2s(p,l);
1311 if ((l+nc+2) > llen)
1312 {
1313 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1314 goto cont; /* netscape bugs */
1315 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1316 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1317 goto err;
1318 }
1319
1320 q=p;
1321
1322 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1323 {
1324 /* If netscape tolerance is on, ignore errors */
1325 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1326 goto cont;
1327 else
1328 {
1329 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1330 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1331 goto err;
1332 }
1333 }
1334
1335 if (q != (p+l))
1336 {
1337 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1338 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1339 goto err;
1340 }
1341 if (!sk_X509_NAME_push(ca_sk,xn))
1342 {
1343 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1344 goto err;
1345 }
1346
1347 p+=l;
1348 nc+=l+2;
1349 }
1350
1351 if (0)
1352 {
1353 cont:
1354 ERR_clear_error();
1355 }
1356
1357 /* we should setup a certificate to return.... */
1358 s->s3->tmp.cert_req=1;
1359 s->s3->tmp.ctype_num=ctype_num;
1360 if (s->s3->tmp.ca_names != NULL)
1361 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1362 s->s3->tmp.ca_names=ca_sk;
1363 ca_sk=NULL;
1364
1365 ret=1;
1366 err:
1367 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1368 return(ret);
1369 }
1370
1371 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1372 {
1373 return(X509_NAME_cmp(*a,*b));
1374 }
1375
1376 static int ssl3_get_server_done(SSL *s)
1377 {
1378 int ok,ret=0;
1379 long n;
1380
1381 n=ssl3_get_message(s,
1382 SSL3_ST_CR_SRVR_DONE_A,
1383 SSL3_ST_CR_SRVR_DONE_B,
1384 SSL3_MT_SERVER_DONE,
1385 30, /* should be very small, like 0 :-) */
1386 &ok);
1387
1388 if (!ok) return((int)n);
1389 if (n > 0)
1390 {
1391 /* should contain no data */
1392 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1393 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1394 return -1;
1395 }
1396 ret=1;
1397 return(ret);
1398 }
1399
1400 static int ssl3_send_client_key_exchange(SSL *s)
1401 {
1402 unsigned char *p,*d;
1403 int n;
1404 unsigned long l;
1405 #ifndef OPENSSL_NO_RSA
1406 unsigned char *q;
1407 EVP_PKEY *pkey=NULL;
1408 #endif
1409 #ifndef OPENSSL_NO_KRB5
1410 KSSL_ERR kssl_err;
1411 #endif /* OPENSSL_NO_KRB5 */
1412
1413 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1414 {
1415 d=(unsigned char *)s->init_buf->data;
1416 p= &(d[4]);
1417
1418 l=s->s3->tmp.new_cipher->algorithms;
1419
1420 /* Fool emacs indentation */
1421 if (0) {}
1422 #ifndef OPENSSL_NO_RSA
1423 else if (l & SSL_kRSA)
1424 {
1425 RSA *rsa;
1426 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1427
1428 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1429 rsa=s->session->sess_cert->peer_rsa_tmp;
1430 else
1431 {
1432 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1433 if ((pkey == NULL) ||
1434 (pkey->type != EVP_PKEY_RSA) ||
1435 (pkey->pkey.rsa == NULL))
1436 {
1437 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1438 goto err;
1439 }
1440 rsa=pkey->pkey.rsa;
1441 EVP_PKEY_free(pkey);
1442 }
1443
1444 tmp_buf[0]=s->client_version>>8;
1445 tmp_buf[1]=s->client_version&0xff;
1446 if (RAND_bytes(&(tmp_buf[2]),SSL_MAX_MASTER_KEY_LENGTH-2) <= 0)
1447 goto err;
1448
1449 s->session->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
1450
1451 q=p;
1452 /* Fix buf for TLS and beyond */
1453 if (s->version > SSL3_VERSION)
1454 p+=2;
1455 n=RSA_public_encrypt(SSL_MAX_MASTER_KEY_LENGTH,
1456 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1457 #ifdef PKCS1_CHECK
1458 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1459 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1460 #endif
1461 if (n <= 0)
1462 {
1463 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1464 goto err;
1465 }
1466
1467 /* Fix buf for TLS and beyond */
1468 if (s->version > SSL3_VERSION)
1469 {
1470 s2n(n,q);
1471 n+=2;
1472 }
1473
1474 s->session->master_key_length=
1475 s->method->ssl3_enc->generate_master_secret(s,
1476 s->session->master_key,
1477 tmp_buf,SSL_MAX_MASTER_KEY_LENGTH);
1478 memset(tmp_buf,0,SSL_MAX_MASTER_KEY_LENGTH);
1479 }
1480 #endif
1481 #ifndef OPENSSL_NO_KRB5
1482 else if (l & SSL_kKRB5)
1483 {
1484 krb5_error_code krb5rc;
1485 KSSL_CTX *kssl_ctx = s->kssl_ctx;
1486 /* krb5_data krb5_ap_req; */
1487 krb5_data *enc_ticket;
1488 krb5_data authenticator, *authp = NULL;
1489 EVP_CIPHER_CTX ciph_ctx;
1490 EVP_CIPHER *enc = NULL;
1491 unsigned char iv[EVP_MAX_IV_LENGTH];
1492 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1493 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
1494 + EVP_MAX_IV_LENGTH];
1495 int padl, outl = sizeof(epms);
1496
1497 EVP_CIPHER_CTX_init(&ciph_ctx);
1498
1499 #ifdef KSSL_DEBUG
1500 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
1501 l, SSL_kKRB5);
1502 #endif /* KSSL_DEBUG */
1503
1504 authp = NULL;
1505 #ifdef KRB5SENDAUTH
1506 if (KRB5SENDAUTH) authp = &authenticator;
1507 #endif /* KRB5SENDAUTH */
1508
1509 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
1510 &kssl_err);
1511 enc = kssl_map_enc(kssl_ctx->enctype);
1512 if (enc == NULL)
1513 goto err;
1514 #ifdef KSSL_DEBUG
1515 {
1516 printf("kssl_cget_tkt rtn %d\n", krb5rc);
1517 if (krb5rc && kssl_err.text)
1518 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
1519 }
1520 #endif /* KSSL_DEBUG */
1521
1522 if (krb5rc)
1523 {
1524 ssl3_send_alert(s,SSL3_AL_FATAL,
1525 SSL_AD_HANDSHAKE_FAILURE);
1526 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1527 kssl_err.reason);
1528 goto err;
1529 }
1530
1531 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
1532 ** in place of RFC 2712 KerberosWrapper, as in:
1533 **
1534 ** Send ticket (copy to *p, set n = length)
1535 ** n = krb5_ap_req.length;
1536 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
1537 ** if (krb5_ap_req.data)
1538 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
1539 **
1540 ** Now using real RFC 2712 KerberosWrapper
1541 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
1542 ** Note: 2712 "opaque" types are here replaced
1543 ** with a 2-byte length followed by the value.
1544 ** Example:
1545 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
1546 ** Where "xx xx" = length bytes. Shown here with
1547 ** optional authenticator omitted.
1548 */
1549
1550 /* KerberosWrapper.Ticket */
1551 s2n(enc_ticket->length,p);
1552 memcpy(p, enc_ticket->data, enc_ticket->length);
1553 p+= enc_ticket->length;
1554 n = enc_ticket->length + 2;
1555
1556 /* KerberosWrapper.Authenticator */
1557 if (authp && authp->length)
1558 {
1559 s2n(authp->length,p);
1560 memcpy(p, authp->data, authp->length);
1561 p+= authp->length;
1562 n+= authp->length + 2;
1563
1564 free(authp->data);
1565 authp->data = NULL;
1566 authp->length = 0;
1567 }
1568 else
1569 {
1570 s2n(0,p);/* null authenticator length */
1571 n+=2;
1572 }
1573
1574 if (RAND_bytes(tmp_buf,SSL_MAX_MASTER_KEY_LENGTH) <= 0)
1575 goto err;
1576
1577 /* 20010420 VRS. Tried it this way; failed.
1578 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
1579 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
1580 ** kssl_ctx->length);
1581 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
1582 */
1583
1584 memset(iv, 0, EVP_MAX_IV_LENGTH); /* per RFC 1510 */
1585 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
1586 kssl_ctx->key,iv);
1587 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
1588 SSL_MAX_MASTER_KEY_LENGTH);
1589 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
1590 outl += padl;
1591 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
1592
1593 /* KerberosWrapper.EncryptedPreMasterSecret */
1594 s2n(outl,p);
1595 memcpy(p, epms, outl);
1596 p+=outl;
1597 n+=outl + 2;
1598
1599 s->session->master_key_length=
1600 s->method->ssl3_enc->generate_master_secret(s,
1601 s->session->master_key,
1602 tmp_buf, SSL_MAX_MASTER_KEY_LENGTH);
1603
1604 memset(tmp_buf, 0, SSL_MAX_MASTER_KEY_LENGTH);
1605 memset(epms, 0, outl);
1606 }
1607 #endif
1608 #ifndef OPENSSL_NO_DH
1609 else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1610 {
1611 DH *dh_srvr,*dh_clnt;
1612
1613 if (s->session->sess_cert->peer_dh_tmp != NULL)
1614 dh_srvr=s->session->sess_cert->peer_dh_tmp;
1615 else
1616 {
1617 /* we get them from the cert */
1618 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1619 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1620 goto err;
1621 }
1622
1623 /* generate a new random key */
1624 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1625 {
1626 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1627 goto err;
1628 }
1629 if (!DH_generate_key(dh_clnt))
1630 {
1631 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1632 goto err;
1633 }
1634
1635 /* use the 'p' output buffer for the DH key, but
1636 * make sure to clear it out afterwards */
1637
1638 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1639
1640 if (n <= 0)
1641 {
1642 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1643 goto err;
1644 }
1645
1646 /* generate master key from the result */
1647 s->session->master_key_length=
1648 s->method->ssl3_enc->generate_master_secret(s,
1649 s->session->master_key,p,n);
1650 /* clean up */
1651 memset(p,0,n);
1652
1653 /* send off the data */
1654 n=BN_num_bytes(dh_clnt->pub_key);
1655 s2n(n,p);
1656 BN_bn2bin(dh_clnt->pub_key,p);
1657 n+=2;
1658
1659 DH_free(dh_clnt);
1660
1661 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1662 }
1663 #endif
1664 else
1665 {
1666 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1667 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1668 goto err;
1669 }
1670
1671 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1672 l2n3(n,d);
1673
1674 s->state=SSL3_ST_CW_KEY_EXCH_B;
1675 /* number of bytes to write */
1676 s->init_num=n+4;
1677 s->init_off=0;
1678 }
1679
1680 /* SSL3_ST_CW_KEY_EXCH_B */
1681 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1682 err:
1683 return(-1);
1684 }
1685
1686 static int ssl3_send_client_verify(SSL *s)
1687 {
1688 unsigned char *p,*d;
1689 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1690 EVP_PKEY *pkey;
1691 #ifndef OPENSSL_NO_RSA
1692 unsigned u=0;
1693 #endif
1694 unsigned long n;
1695 #ifndef OPENSSL_NO_DSA
1696 int j;
1697 #endif
1698
1699 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1700 {
1701 d=(unsigned char *)s->init_buf->data;
1702 p= &(d[4]);
1703 pkey=s->cert->key->privatekey;
1704
1705 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
1706 &(data[MD5_DIGEST_LENGTH]));
1707
1708 #ifndef OPENSSL_NO_RSA
1709 if (pkey->type == EVP_PKEY_RSA)
1710 {
1711 s->method->ssl3_enc->cert_verify_mac(s,
1712 &(s->s3->finish_dgst1),&(data[0]));
1713 if (RSA_sign(NID_md5_sha1, data,
1714 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1715 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
1716 {
1717 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1718 goto err;
1719 }
1720 s2n(u,p);
1721 n=u+2;
1722 }
1723 else
1724 #endif
1725 #ifndef OPENSSL_NO_DSA
1726 if (pkey->type == EVP_PKEY_DSA)
1727 {
1728 if (!DSA_sign(pkey->save_type,
1729 &(data[MD5_DIGEST_LENGTH]),
1730 SHA_DIGEST_LENGTH,&(p[2]),
1731 (unsigned int *)&j,pkey->pkey.dsa))
1732 {
1733 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1734 goto err;
1735 }
1736 s2n(j,p);
1737 n=j+2;
1738 }
1739 else
1740 #endif
1741 {
1742 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
1743 goto err;
1744 }
1745 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
1746 l2n3(n,d);
1747
1748 s->init_num=(int)n+4;
1749 s->init_off=0;
1750 }
1751 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1752 err:
1753 return(-1);
1754 }
1755
1756 static int ssl3_send_client_certificate(SSL *s)
1757 {
1758 X509 *x509=NULL;
1759 EVP_PKEY *pkey=NULL;
1760 int i;
1761 unsigned long l;
1762
1763 if (s->state == SSL3_ST_CW_CERT_A)
1764 {
1765 if ((s->cert == NULL) ||
1766 (s->cert->key->x509 == NULL) ||
1767 (s->cert->key->privatekey == NULL))
1768 s->state=SSL3_ST_CW_CERT_B;
1769 else
1770 s->state=SSL3_ST_CW_CERT_C;
1771 }
1772
1773 /* We need to get a client cert */
1774 if (s->state == SSL3_ST_CW_CERT_B)
1775 {
1776 /* If we get an error, we need to
1777 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1778 * We then get retied later */
1779 i=0;
1780 if (s->ctx->client_cert_cb != NULL)
1781 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
1782 if (i < 0)
1783 {
1784 s->rwstate=SSL_X509_LOOKUP;
1785 return(-1);
1786 }
1787 s->rwstate=SSL_NOTHING;
1788 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1789 {
1790 s->state=SSL3_ST_CW_CERT_B;
1791 if ( !SSL_use_certificate(s,x509) ||
1792 !SSL_use_PrivateKey(s,pkey))
1793 i=0;
1794 }
1795 else if (i == 1)
1796 {
1797 i=0;
1798 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1799 }
1800
1801 if (x509 != NULL) X509_free(x509);
1802 if (pkey != NULL) EVP_PKEY_free(pkey);
1803 if (i == 0)
1804 {
1805 if (s->version == SSL3_VERSION)
1806 {
1807 s->s3->tmp.cert_req=0;
1808 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1809 return(1);
1810 }
1811 else
1812 {
1813 s->s3->tmp.cert_req=2;
1814 }
1815 }
1816
1817 /* Ok, we have a cert */
1818 s->state=SSL3_ST_CW_CERT_C;
1819 }
1820
1821 if (s->state == SSL3_ST_CW_CERT_C)
1822 {
1823 s->state=SSL3_ST_CW_CERT_D;
1824 l=ssl3_output_cert_chain(s,
1825 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
1826 s->init_num=(int)l;
1827 s->init_off=0;
1828 }
1829 /* SSL3_ST_CW_CERT_D */
1830 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1831 }
1832
1833 #define has_bits(i,m) (((i)&(m)) == (m))
1834
1835 static int ssl3_check_cert_and_algorithm(SSL *s)
1836 {
1837 int i,idx;
1838 long algs;
1839 EVP_PKEY *pkey=NULL;
1840 SESS_CERT *sc;
1841 #ifndef OPENSSL_NO_RSA
1842 RSA *rsa;
1843 #endif
1844 #ifndef OPENSSL_NO_DH
1845 DH *dh;
1846 #endif
1847
1848 sc=s->session->sess_cert;
1849
1850 if (sc == NULL)
1851 {
1852 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
1853 goto err;
1854 }
1855
1856 algs=s->s3->tmp.new_cipher->algorithms;
1857
1858 /* we don't have a certificate */
1859 if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5))
1860 return(1);
1861
1862 #ifndef OPENSSL_NO_RSA
1863 rsa=s->session->sess_cert->peer_rsa_tmp;
1864 #endif
1865 #ifndef OPENSSL_NO_DH
1866 dh=s->session->sess_cert->peer_dh_tmp;
1867 #endif
1868
1869 /* This is the passed certificate */
1870
1871 idx=sc->peer_cert_type;
1872 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
1873 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
1874 EVP_PKEY_free(pkey);
1875
1876
1877 /* Check that we have a certificate if we require one */
1878 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
1879 {
1880 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
1881 goto f_err;
1882 }
1883 #ifndef OPENSSL_NO_DSA
1884 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
1885 {
1886 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
1887 goto f_err;
1888 }
1889 #endif
1890 #ifndef OPENSSL_NO_RSA
1891 if ((algs & SSL_kRSA) &&
1892 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
1893 {
1894 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
1895 goto f_err;
1896 }
1897 #endif
1898 #ifndef OPENSSL_NO_DH
1899 if ((algs & SSL_kEDH) &&
1900 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
1901 {
1902 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
1903 goto f_err;
1904 }
1905 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
1906 {
1907 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
1908 goto f_err;
1909 }
1910 #ifndef OPENSSL_NO_DSA
1911 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
1912 {
1913 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
1914 goto f_err;
1915 }
1916 #endif
1917 #endif
1918
1919 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
1920 {
1921 #ifndef OPENSSL_NO_RSA
1922 if (algs & SSL_kRSA)
1923 {
1924 if (rsa == NULL
1925 || RSA_size(rsa) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
1926 {
1927 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
1928 goto f_err;
1929 }
1930 }
1931 else
1932 #endif
1933 #ifndef OPENSSL_NO_DH
1934 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1935 {
1936 if (dh == NULL
1937 || DH_size(dh) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
1938 {
1939 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
1940 goto f_err;
1941 }
1942 }
1943 else
1944 #endif
1945 {
1946 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1947 goto f_err;
1948 }
1949 }
1950 return(1);
1951 f_err:
1952 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1953 err:
1954 return(0);
1955 }
1956
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