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Import of old SSLeay release: SSLeay 0.9.1b (unreleased)
[thirdparty/openssl.git] / ssl / s3_clnt.c
CommitLineData
d02b48c6 1/* ssl/s3_clnt.c */
58964a49 2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
d02b48c6
RE		 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#include <stdio.h>
60#include "buffer.h"
61#include "rand.h"
62#include "objects.h"
63#include "evp.h"
64#include "ssl_locl.h"
65
66#define BREAK break
67/* SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,ERR_R_MALLOC_FAILURE);
68 * SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
69 * SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,ERR_R_MALLOC_FAILURE);
70 * SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
71 * SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
72 * SSLerr(SSL_F_SSL3_GET_SERVER_DONE,ERR_R_MALLOC_FAILURE);
73SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_SHORT);
74 */
75
76#ifndef NOPROTO
77static int ssl3_client_hello(SSL *s);
78static int ssl3_get_server_hello(SSL *s);
79static int ssl3_get_certificate_request(SSL *s);
80static int ca_dn_cmp(X509_NAME **a,X509_NAME **b);
81static int ssl3_get_server_done(SSL *s);
82static int ssl3_send_client_verify(SSL *s);
83static int ssl3_send_client_certificate(SSL *s);
84static int ssl3_send_client_key_exchange(SSL *s);
85static int ssl3_get_key_exchange(SSL *s);
86static int ssl3_get_server_certificate(SSL *s);
87static int ssl3_check_cert_and_algorithm(SSL *s);
88#else
89static int ssl3_client_hello();
90static int ssl3_get_server_hello();
91static int ssl3_get_certificate_request();
92static int ca_dn_cmp();
93static int ssl3_get_server_done();
94static int ssl3_send_client_verify();
95static int ssl3_send_client_certificate();
96static int ssl3_send_client_key_exchange();
97static int ssl3_get_key_exchange();
98static int ssl3_get_server_certificate();
99static int ssl3_check_cert_and_algorithm();
100#endif
101
102static SSL_METHOD *ssl3_get_client_method(ver)
103int ver;
104 {
58964a49 105 if (ver == SSL3_VERSION)
d02b48c6
RE		 106 return(SSLv3_client_method());
107 else
108 return(NULL);
109 }
110
111SSL_METHOD *SSLv3_client_method()
112 {
113 static int init=1;
114 static SSL_METHOD SSLv3_client_data;
115
116 if (init)
117 {
118 init=0;
119 memcpy((char *)&SSLv3_client_data,(char *)sslv3_base_method(),
120 sizeof(SSL_METHOD));
121 SSLv3_client_data.ssl_connect=ssl3_connect;
122 SSLv3_client_data.get_ssl_method=ssl3_get_client_method;
123 }
124 return(&SSLv3_client_data);
125 }
126
127int ssl3_connect(s)
128SSL *s;
129 {
130 BUF_MEM *buf;
131 unsigned long Time=time(NULL),l;
132 long num1;
133 void (*cb)()=NULL;
134 int ret= -1;
58964a49 135 BIO *under;
d02b48c6
RE		 136 int new_state,state,skip=0;;
137
138 RAND_seed((unsigned char *)&Time,sizeof(Time));
139 ERR_clear_error();
58964a49 140 clear_sys_error();
d02b48c6
RE		 141
142 if (s->info_callback != NULL)
143 cb=s->info_callback;
144 else if (s->ctx->info_callback != NULL)
145 cb=s->ctx->info_callback;
146
147 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
148 s->in_handshake++;
149
150 for (;;)
151 {
152 state=s->state;
153
154 switch(s->state)
155 {
156 case SSL_ST_RENEGOTIATE:
157 s->new_session=1;
158 s->state=SSL_ST_CONNECT;
58964a49 159 s->ctx->sess_connect_renegotiate++;
d02b48c6
RE		 160 /* break */
161 case SSL_ST_BEFORE:
162 case SSL_ST_CONNECT:
163 case SSL_ST_BEFORE|SSL_ST_CONNECT:
164 case SSL_ST_OK|SSL_ST_CONNECT:
165
166 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
167
58964a49
RE		 168 if ((s->version & 0xff00 ) != 0x0300)
169 abort();
170 /* s->version=SSL3_VERSION; */
d02b48c6
RE		 171 s->type=SSL_ST_CONNECT;
172
173 if (s->init_buf == NULL)
174 {
175 if ((buf=BUF_MEM_new()) == NULL)
176 {
177 ret= -1;
178 goto end;
179 }
180 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
181 {
182 ret= -1;
183 goto end;
184 }
185 s->init_buf=buf;
186 }
187
188 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
189
190 /* setup buffing BIO */
58964a49 191 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
d02b48c6
RE		 192
193 /* don't push the buffering BIO quite yet */
194
195 ssl3_init_finished_mac(s);
196
197 s->state=SSL3_ST_CW_CLNT_HELLO_A;
198 s->ctx->sess_connect++;
199 s->init_num=0;
200 break;
201
202 case SSL3_ST_CW_CLNT_HELLO_A:
203 case SSL3_ST_CW_CLNT_HELLO_B:
204
205 s->shutdown=0;
206 ret=ssl3_client_hello(s);
207 if (ret <= 0) goto end;
208 s->state=SSL3_ST_CR_SRVR_HELLO_A;
209 s->init_num=0;
210
211 /* turn on buffering for the next lot of output */
58964a49
RE		 212 if (s->bbio != s->wbio)
213 s->wbio=BIO_push(s->bbio,s->wbio);
d02b48c6
RE		 214
215 break;
216
217 case SSL3_ST_CR_SRVR_HELLO_A:
218 case SSL3_ST_CR_SRVR_HELLO_B:
219 ret=ssl3_get_server_hello(s);
220 if (ret <= 0) goto end;
221 if (s->hit)
222 s->state=SSL3_ST_CR_FINISHED_A;
223 else
224 s->state=SSL3_ST_CR_CERT_A;
225 s->init_num=0;
226 break;
227
228 case SSL3_ST_CR_CERT_A:
229 case SSL3_ST_CR_CERT_B:
230 /* Check if it is anon DH */
231 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
232 {
233 ret=ssl3_get_server_certificate(s);
234 if (ret <= 0) goto end;
235 }
236 else
237 skip=1;
238 s->state=SSL3_ST_CR_KEY_EXCH_A;
239 s->init_num=0;
240 break;
241
242 case SSL3_ST_CR_KEY_EXCH_A:
243 case SSL3_ST_CR_KEY_EXCH_B:
244 ret=ssl3_get_key_exchange(s);
245 if (ret <= 0) goto end;
246 s->state=SSL3_ST_CR_CERT_REQ_A;
247 s->init_num=0;
248
249 /* at this point we check that we have the
250 * required stuff from the server */
251 if (!ssl3_check_cert_and_algorithm(s))
252 {
253 ret= -1;
254 goto end;
255 }
256 break;
257
258 case SSL3_ST_CR_CERT_REQ_A:
259 case SSL3_ST_CR_CERT_REQ_B:
260 ret=ssl3_get_certificate_request(s);
261 if (ret <= 0) goto end;
262 s->state=SSL3_ST_CR_SRVR_DONE_A;
263 s->init_num=0;
264 break;
265
266 case SSL3_ST_CR_SRVR_DONE_A:
267 case SSL3_ST_CR_SRVR_DONE_B:
268 ret=ssl3_get_server_done(s);
269 if (ret <= 0) goto end;
270 if (s->s3->tmp.cert_req)
271 s->state=SSL3_ST_CW_CERT_A;
272 else
273 s->state=SSL3_ST_CW_KEY_EXCH_A;
274 s->init_num=0;
275
276 break;
277
278 case SSL3_ST_CW_CERT_A:
279 case SSL3_ST_CW_CERT_B:
280 case SSL3_ST_CW_CERT_C:
281 ret=ssl3_send_client_certificate(s);
282 if (ret <= 0) goto end;
283 s->state=SSL3_ST_CW_KEY_EXCH_A;
284 s->init_num=0;
285 break;
286
287 case SSL3_ST_CW_KEY_EXCH_A:
288 case SSL3_ST_CW_KEY_EXCH_B:
289 ret=ssl3_send_client_key_exchange(s);
290 if (ret <= 0) goto end;
291 l=s->s3->tmp.new_cipher->algorithms;
292 /* EAY EAY EAY need to check for DH fix cert
293 * sent back */
58964a49
RE		 294 /* For TLS, cert_req is set to 2, so a cert chain
295 * of nothing is sent, but no verify packet is sent */
296 if (s->s3->tmp.cert_req == 1)
d02b48c6
RE		 297 {
298 s->state=SSL3_ST_CW_CERT_VRFY_A;
299 }
300 else
301 {
302 s->state=SSL3_ST_CW_CHANGE_A;
303 s->s3->change_cipher_spec=0;
304 }
305
306 s->init_num=0;
307 break;
308
309 case SSL3_ST_CW_CERT_VRFY_A:
310 case SSL3_ST_CW_CERT_VRFY_B:
311 ret=ssl3_send_client_verify(s);
312 if (ret <= 0) goto end;
313 s->state=SSL3_ST_CW_CHANGE_A;
314 s->init_num=0;
315 s->s3->change_cipher_spec=0;
316 break;
317
318 case SSL3_ST_CW_CHANGE_A:
319 case SSL3_ST_CW_CHANGE_B:
320 ret=ssl3_send_change_cipher_spec(s,
321 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
322 if (ret <= 0) goto end;
323 s->state=SSL3_ST_CW_FINISHED_A;
324 s->init_num=0;
325
326 s->session->cipher=s->s3->tmp.new_cipher;
58964a49 327 if (!s->method->ssl3_enc->setup_key_block(s))
d02b48c6
RE		 328 {
329 ret= -1;
330 goto end;
331 }
332
58964a49 333 if (!s->method->ssl3_enc->change_cipher_state(s,
d02b48c6
RE		 334 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
335 {
336 ret= -1;
337 goto end;
338 }
339
340 break;
341
342 case SSL3_ST_CW_FINISHED_A:
343 case SSL3_ST_CW_FINISHED_B:
344 ret=ssl3_send_finished(s,
345 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
58964a49
RE		 346 s->method->ssl3_enc->client_finished,
347 s->method->ssl3_enc->client_finished_len);
d02b48c6
RE		 348 if (ret <= 0) goto end;
349 s->state=SSL3_ST_CW_FLUSH;
350
351 /* clear flags */
352 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
353 if (s->hit)
354 {
355 s->s3->tmp.next_state=SSL_ST_OK;
356 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
357 {
358 s->state=SSL_ST_OK;
359 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
360 s->s3->delay_buf_pop_ret=0;
361 }
362 }
363 else
364 {
365 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
366 }
367 s->init_num=0;
368 break;
369
370 case SSL3_ST_CR_FINISHED_A:
371 case SSL3_ST_CR_FINISHED_B:
372
373 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
58964a49 374 SSL3_ST_CR_FINISHED_B);
d02b48c6
RE		 375 if (ret <= 0) goto end;
376
377 if (s->hit)
378 s->state=SSL3_ST_CW_CHANGE_A;
379 else
380 s->state=SSL_ST_OK;
381 s->init_num=0;
382 break;
383
384 case SSL3_ST_CW_FLUSH:
385 /* number of bytes to be flushed */
386 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
387 if (num1 > 0)
388 {
389 s->rwstate=SSL_WRITING;
390 num1=BIO_flush(s->wbio);
391 if (num1 <= 0) { ret= -1; goto end; }
392 s->rwstate=SSL_NOTHING;
393 }
394
395 s->state=s->s3->tmp.next_state;
396 break;
397
398 case SSL_ST_OK:
399 /* clean a few things up */
400 ssl3_cleanup_key_block(s);
401
402 BUF_MEM_free(s->init_buf);
403 s->init_buf=NULL;
404
405 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
406 {
407 /* remove buffering */
408 under=BIO_pop(s->wbio);
409 if (under != NULL)
410 s->wbio=under;
411 else
412 abort(); /* ok */
413
414 BIO_free(s->bbio);
415 s->bbio=NULL;
416 }
417 /* else do it later */
418
419 s->init_num=0;
420 s->new_session=0;
421
422 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
58964a49 423 if (s->hit) s->ctx->sess_hit++;
d02b48c6
RE		 424
425 ret=1;
426 /* s->server=0; */
427 s->handshake_func=ssl3_connect;
428 s->ctx->sess_connect_good++;
429
430 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
431
432 goto end;
dfeab068 433 /* break; */
d02b48c6
RE		 434
435 default:
436 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
437 ret= -1;
438 goto end;
439 /* break; */
440 }
441
442 /* did we do anything */
443 if (!s->s3->tmp.reuse_message && !skip)
444 {
58964a49
RE		 445 if (s->debug)
446 {
447 if ((ret=BIO_flush(s->wbio)) <= 0)
448 goto end;
449 }
d02b48c6
RE		 450
451 if ((cb != NULL) && (s->state != state))
452 {
453 new_state=s->state;
454 s->state=state;
455 cb(s,SSL_CB_CONNECT_LOOP,1);
456 s->state=new_state;
457 }
458 }
459 skip=0;
460 }
461end:
462 if (cb != NULL)
463 cb(s,SSL_CB_CONNECT_EXIT,ret);
464 s->in_handshake--;
465 return(ret);
466 }
467
468
469static int ssl3_client_hello(s)
470SSL *s;
471 {
472 unsigned char *buf;
473 unsigned char *p,*d;
474 int i;
475 unsigned long Time,l;
476
477 buf=(unsigned char *)s->init_buf->data;
478 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
479 {
480 if ((s->session == NULL) ||
dfeab068
RE		 481 (s->session->ssl_version != s->version) ||
482 (s->session->not_resumable))
d02b48c6
RE		 483 {
484 if (!ssl_get_new_session(s,0))
485 goto err;
486 }
487 /* else use the pre-loaded session */
488
489 p=s->s3->client_random;
490 Time=time(NULL); /* Time */
491 l2n(Time,p);
dfeab068 492 RAND_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
d02b48c6
RE		 493
494 /* Do the message type and length last */
495 d=p= &(buf[4]);
496
58964a49
RE		 497 *(p++)=s->version>>8;
498 *(p++)=s->version&0xff;
d02b48c6
RE		 499
500 /* Random stuff */
501 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
502 p+=SSL3_RANDOM_SIZE;
503
504 /* Session ID */
505 if (s->new_session)
506 i=0;
507 else
508 i=s->session->session_id_length;
509 *(p++)=i;
510 if (i != 0)
511 {
512 memcpy(p,s->session->session_id,i);
513 p+=i;
514 }
515
516 /* Ciphers supported */
517 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]));
518 if (i == 0)
519 {
520 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
521 goto err;
522 }
523 s2n(i,p);
524 p+=i;
525
526 /* hardwire in the NULL compression algorithm. */
dfeab068 527 /* COMPRESSION */
d02b48c6
RE		 528 *(p++)=1;
529 *(p++)=0;
530
531 l=(p-d);
532 d=buf;
533 *(d++)=SSL3_MT_CLIENT_HELLO;
534 l2n3(l,d);
535
536 s->state=SSL3_ST_CW_CLNT_HELLO_B;
537 /* number of bytes to write */
538 s->init_num=p-buf;
539 s->init_off=0;
540 }
541
542 /* SSL3_ST_CW_CLNT_HELLO_B */
543 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
544err:
545 return(-1);
546 }
547
548static int ssl3_get_server_hello(s)
549SSL *s;
550 {
551 STACK *sk;
552 SSL_CIPHER *c;
553 unsigned char *p,*d;
554 int i,al,ok;
555 unsigned int j;
556 long n;
557
558 n=ssl3_get_message(s,
559 SSL3_ST_CR_SRVR_HELLO_A,
560 SSL3_ST_CR_SRVR_HELLO_B,
561 SSL3_MT_SERVER_HELLO,
562 300, /* ?? */
563 &ok);
564
565 if (!ok) return((int)n);
566 d=p=(unsigned char *)s->init_buf->data;
567
58964a49 568 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
d02b48c6
RE		 569 {
570 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
58964a49
RE		 571 s->version=(s->version&0xff00)|p[1];
572 al=SSL_AD_PROTOCOL_VERSION;
573 goto f_err;
d02b48c6
RE		 574 }
575 p+=2;
576
577 /* load the server hello data */
578 /* load the server random */
579 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
580 p+=SSL3_RANDOM_SIZE;
581
582 /* get the session-id */
583 j= *(p++);
584
585 if ((j != 0) && (j != SSL3_SESSION_ID_SIZE))
586 {
587 /* SSLref returns 16 :-( */
588 if (j < SSL2_SSL_SESSION_ID_LENGTH)
589 {
58964a49 590 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 591 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_SHORT);
592 goto f_err;
593 }
594 }
58964a49 595 if ((j != 0) && (j == s->session->session_id_length) &&
d02b48c6
RE		 596 (memcmp(p,s->session->session_id,j) == 0))
597 s->hit=1;
58964a49 598 else /* a miss or crap from the other end */
d02b48c6 599 {
58964a49
RE		 600 /* If we were trying for session-id reuse, make a new
601 * SSL_SESSION so we don't stuff up other people */
d02b48c6 602 s->hit=0;
58964a49
RE		 603 if (s->session->session_id_length > 0)
604 {
605 if (!ssl_get_new_session(s,0))
606 {
607 al=SSL_AD_INTERNAL_ERROR;
608 goto f_err;
609 }
610 }
611 s->session->session_id_length=j;
612 memcpy(s->session->session_id,p,j); /* j could be 0 */
d02b48c6
RE		 613 }
614 p+=j;
615 c=ssl_get_cipher_by_char(s,p);
616 if (c == NULL)
617 {
618 /* unknown cipher */
58964a49 619 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 620 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
621 goto f_err;
622 }
623 p+=ssl_put_cipher_by_char(s,NULL,NULL);
624
625 sk=ssl_get_ciphers_by_id(s);
626 i=sk_find(sk,(char *)c);
627 if (i < 0)
628 {
629 /* we did not say we would use this cipher */
58964a49 630 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 631 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
632 goto f_err;
633 }
634
635 if (s->hit && (s->session->cipher != c))
636 {
58964a49 637 if (!(s->options &
d02b48c6
RE		 638 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
639 {
58964a49 640 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 641 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
642 goto f_err;
643 }
644 }
645 s->s3->tmp.new_cipher=c;
646
647 /* lets get the compression algorithm */
dfeab068 648 /* COMPRESSION */
d02b48c6
RE		 649 j= *(p++);
650 if (j != 0)
651 {
58964a49 652 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 653 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
654 goto f_err;
655 }
656
657 if (p != (d+n))
658 {
659 /* wrong packet length */
58964a49 660 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 661 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
662 goto err;
663 }
664
665 return(1);
666f_err:
667 ssl3_send_alert(s,SSL3_AL_FATAL,al);
668err:
669 return(-1);
670 }
671
672static int ssl3_get_server_certificate(s)
673SSL *s;
674 {
675 int al,i,ok,ret= -1;
676 unsigned long n,nc,llen,l;
677 X509 *x=NULL;
678 unsigned char *p,*d,*q;
679 STACK *sk=NULL;
680 CERT *c;
681 EVP_PKEY *pkey=NULL;
682
683 n=ssl3_get_message(s,
684 SSL3_ST_CR_CERT_A,
685 SSL3_ST_CR_CERT_B,
686 -1,
687#if defined(MSDOS) && !defined(WIN32)
688 1024*30, /* 30k max cert list :-) */
689#else
690 1024*100, /* 100k max cert list :-) */
691#endif
692 &ok);
693
694 if (!ok) return((int)n);
695
696 if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE)
697 {
698 s->s3->tmp.reuse_message=1;
699 return(1);
700 }
701
702 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
703 {
58964a49 704 al=SSL_AD_UNEXPECTED_MESSAGE;
d02b48c6
RE		 705 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
706 goto f_err;
707 }
708 d=p=(unsigned char *)s->init_buf->data;
709
710 if ((sk=sk_new_null()) == NULL)
711 {
712 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
713 goto err;
714 }
715
716 n2l3(p,llen);
717 if (llen+3 != n)
718 {
58964a49 719 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 720 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
721 goto f_err;
722 }
723 for (nc=0; nc<llen; )
724 {
725 n2l3(p,l);
726 if ((l+nc+3) > llen)
727 {
58964a49 728 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 729 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
730 goto f_err;
731 }
732
733 q=p;
734 x=d2i_X509(NULL,&q,l);
735 if (x == NULL)
736 {
58964a49 737 al=SSL_AD_BAD_CERTIFICATE;
d02b48c6
RE		 738 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
739 goto f_err;
740 }
741 if (q != (p+l))
742 {
58964a49 743 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 744 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
745 goto f_err;
746 }
747 if (!sk_push(sk,(char *)x))
748 {
749 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
750 goto err;
751 }
752 x=NULL;
753 nc+=l+3;
754 p=q;
755 }
756
757 i=ssl_verify_cert_chain(s,sk);
758 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i))
759 {
760 al=ssl_verify_alarm_type(s->verify_result);
761 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
762 goto f_err;
763 }
764
765 c=ssl_cert_new();
766 if (c == NULL) goto err;
767
768 if (s->session->cert) ssl_cert_free(s->session->cert);
769 s->session->cert=c;
770
771 c->cert_chain=sk;
772 x=(X509 *)sk_value(sk,0);
773 sk=NULL;
774
775 pkey=X509_get_pubkey(x);
776
dfeab068 777 if ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))
d02b48c6
RE		 778 {
779 x=NULL;
780 al=SSL3_AL_FATAL;
781 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
782 goto f_err;
783 }
784
785 i=ssl_cert_type(x,pkey);
786 if (i < 0)
787 {
788 x=NULL;
789 al=SSL3_AL_FATAL;
790 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNKNOWN_CERTIFICATE_TYPE);
791 goto f_err;
792 }
793
794 c->cert_type=i;
58964a49 795 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
d02b48c6
RE		 796 if (c->pkeys[i].x509 != NULL)
797 X509_free(c->pkeys[i].x509);
798 c->pkeys[i].x509=x;
799 c->key= &(c->pkeys[i]);
800
801 if ((s->session != NULL) && (s->session->peer != NULL))
802 X509_free(s->session->peer);
58964a49 803 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
d02b48c6
RE		 804 s->session->peer=x;
805
806 x=NULL;
807 ret=1;
808
809 if (0)
810 {
811f_err:
812 ssl3_send_alert(s,SSL3_AL_FATAL,al);
813 }
814err:
815 if (x != NULL) X509_free(x);
816 if (sk != NULL) sk_pop_free(sk,X509_free);
817 return(ret);
818 }
819
820static int ssl3_get_key_exchange(s)
821SSL *s;
822 {
823#ifndef NO_RSA
824 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
825#endif
826 EVP_MD_CTX md_ctx;
827 unsigned char *param,*p;
828 int al,i,j,param_len,ok;
829 long n,alg;
830 EVP_PKEY *pkey=NULL;
831 RSA *rsa=NULL;
58964a49 832#ifndef NO_DH
d02b48c6 833 DH *dh=NULL;
58964a49 834#endif
d02b48c6
RE		 835
836 n=ssl3_get_message(s,
837 SSL3_ST_CR_KEY_EXCH_A,
838 SSL3_ST_CR_KEY_EXCH_B,
839 -1,
840 1024*8, /* ?? */
841 &ok);
842
843 if (!ok) return((int)n);
844
845 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
846 {
847 s->s3->tmp.reuse_message=1;
848 return(1);
849 }
850
851 param=p=(unsigned char *)s->init_buf->data;
852
853 if (s->session->cert != NULL)
854 {
855#ifndef NO_RSA
856 if (s->session->cert->rsa_tmp != NULL)
857 {
858 RSA_free(s->session->cert->rsa_tmp);
859 s->session->cert->rsa_tmp=NULL;
860 }
861#endif
862#ifndef NO_DH
863 if (s->session->cert->dh_tmp)
864 {
865 DH_free(s->session->cert->dh_tmp);
866 s->session->cert->dh_tmp=NULL;
867 }
868#endif
869 }
870 else
871 {
872 s->session->cert=ssl_cert_new();
873 }
874
875 param_len=0;
876 alg=s->s3->tmp.new_cipher->algorithms;
877
878#ifndef NO_RSA
879 if (alg & SSL_kRSA)
880 {
881 if ((rsa=RSA_new()) == NULL)
882 {
883 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
884 goto err;
885 }
886 n2s(p,i);
887 param_len=i+2;
888 if (param_len > n)
889 {
58964a49 890 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 891 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
892 goto f_err;
893 }
894 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
895 {
896 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
897 goto err;
898 }
899 p+=i;
900
901 n2s(p,i);
902 param_len+=i+2;
903 if (param_len > n)
904 {
58964a49 905 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 906 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
907 goto f_err;
908 }
909 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
910 {
911 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
912 goto err;
913 }
914 p+=i;
915 n-=param_len;
916
917/* s->session->cert->rsa_tmp=rsa;*/
918 /* this should be because we are using an export cipher */
919 if (alg & SSL_aRSA)
920 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_RSA_ENC].x509);
921 else
922 {
923 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
924 goto err;
925 }
926 s->session->cert->rsa_tmp=rsa;
927 }
928 else
929#endif
930#ifndef NO_DH
931 if (alg & SSL_kEDH)
932 {
933 if ((dh=DH_new()) == NULL)
934 {
935 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
936 goto err;
937 }
938 n2s(p,i);
939 param_len=i+2;
940 if (param_len > n)
941 {
58964a49 942 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 943 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
944 goto f_err;
945 }
946 if (!(dh->p=BN_bin2bn(p,i,NULL)))
947 {
948 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
949 goto err;
950 }
951 p+=i;
952
953 n2s(p,i);
954 param_len+=i+2;
955 if (param_len > n)
956 {
58964a49 957 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 958 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
959 goto f_err;
960 }
961 if (!(dh->g=BN_bin2bn(p,i,NULL)))
962 {
963 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
964 goto err;
965 }
966 p+=i;
967
968 n2s(p,i);
969 param_len+=i+2;
970 if (param_len > n)
971 {
58964a49 972 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 973 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
974 goto f_err;
975 }
976 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
977 {
978 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
979 goto err;
980 }
981 p+=i;
982 n-=param_len;
983
984#ifndef NO_RSA
985 if (alg & SSL_aRSA)
986 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_RSA_ENC].x509);
987 else
988#endif
989#ifndef NO_DSA
990 if (alg & SSL_aDSS)
991 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_DSA_SIGN].x509);
992#endif
993 /* else anonymous DH, so no certificate or pkey. */
994
995 s->session->cert->dh_tmp=dh;
996 }
997 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
998 {
58964a49 999 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 1000 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1001 goto f_err;
1002 }
1003#endif
dfeab068
RE		 1004 if (alg & SSL_aFZA)
1005 {
1006 al=SSL_AD_HANDSHAKE_FAILURE;
1007 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1008 goto f_err;
1009 }
1010
d02b48c6
RE		 1011
1012 /* p points to the next byte, there are 'n' bytes left */
1013
1014
1015 /* if it was signed, check the signature */
1016 if (pkey != NULL)
1017 {
1018 n2s(p,i);
1019 n-=2;
1020 j=EVP_PKEY_size(pkey);
1021
1022 if ((i != n) || (n > j) || (n <= 0))
1023 {
1024 /* wrong packet length */
58964a49 1025 al=SSL_AD_DECODE_ERROR;
d02b48c6 1026 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
dfeab068 1027 goto f_err;
d02b48c6
RE		 1028 }
1029
1030#ifndef NO_RSA
1031 if (pkey->type == EVP_PKEY_RSA)
1032 {
1033 int num;
1034
1035 j=0;
1036 q=md_buf;
1037 for (num=2; num > 0; num--)
1038 {
58964a49
RE		 1039 EVP_DigestInit(&md_ctx,(num == 2)
1040 ?s->ctx->md5:s->ctx->sha1);
d02b48c6
RE		 1041 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1042 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1043 EVP_DigestUpdate(&md_ctx,param,param_len);
1044 EVP_DigestFinal(&md_ctx,q,(unsigned int *)&i);
1045 q+=i;
1046 j+=i;
1047 }
1048 i=RSA_public_decrypt((int)n,p,p,pkey->pkey.rsa,
1049 RSA_PKCS1_PADDING);
1050 if (i <= 0)
1051 {
58964a49 1052 al=SSL_AD_DECRYPT_ERROR;
d02b48c6
RE		 1053 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1054 goto f_err;
1055 }
1056 if ((j != i) || (memcmp(p,md_buf,i) != 0))
1057 {
1058 /* bad signature */
58964a49 1059 al=SSL_AD_DECRYPT_ERROR;
d02b48c6
RE		 1060 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1061 goto f_err;
1062 }
1063 }
1064 else
1065#endif
1066#ifndef NO_DSA
1067 if (pkey->type == EVP_PKEY_DSA)
1068 {
1069 /* lets do DSS */
1070 EVP_VerifyInit(&md_ctx,EVP_dss1());
1071 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1072 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1073 EVP_VerifyUpdate(&md_ctx,param,param_len);
1074 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1075 {
1076 /* bad signature */
58964a49 1077 al=SSL_AD_DECRYPT_ERROR;
d02b48c6
RE		 1078 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1079 goto f_err;
1080 }
1081 }
1082 else
1083#endif
1084 {
1085 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1086 goto err;
1087 }
1088 }
1089 else
1090 {
1091 /* still data left over */
1092 if (!(alg & SSL_aNULL))
1093 {
1094 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1095 goto err;
1096 }
1097 if (n != 0)
1098 {
58964a49 1099 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 1100 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1101 goto f_err;
1102 }
1103 }
1104
1105 return(1);
1106f_err:
1107 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1108err:
1109 return(-1);
1110 }
1111
1112static int ssl3_get_certificate_request(s)
1113SSL *s;
1114 {
1115 int ok,ret=0;
58964a49
RE		 1116 unsigned long n,nc,l;
1117 unsigned int llen,ctype_num,i;
d02b48c6
RE		 1118 X509_NAME *xn=NULL;
1119 unsigned char *p,*d,*q;
1120 STACK *ca_sk=NULL;
1121
1122 n=ssl3_get_message(s,
1123 SSL3_ST_CR_CERT_REQ_A,
1124 SSL3_ST_CR_CERT_REQ_B,
1125 -1,
1126#if defined(MSDOS) && !defined(WIN32)
1127 1024*30, /* 30k max cert list :-) */
1128#else
1129 1024*100, /* 100k max cert list :-) */
1130#endif
1131 &ok);
1132
1133 if (!ok) return((int)n);
1134
1135 s->s3->tmp.cert_req=0;
1136
1137 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1138 {
1139 s->s3->tmp.reuse_message=1;
1140 return(1);
1141 }
1142
1143 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1144 {
58964a49 1145 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
d02b48c6
RE		 1146 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1147 goto err;
1148 }
1149
58964a49
RE		 1150 /* TLS does not like anon-DH with client cert */
1151 if (s->version > SSL3_VERSION)
1152 {
1153 l=s->s3->tmp.new_cipher->algorithms;
1154 if (l & SSL_aNULL)
1155 {
1156 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1157 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1158 goto err;
1159 }
1160 }
1161
d02b48c6
RE		 1162 d=p=(unsigned char *)s->init_buf->data;
1163
1164 if ((ca_sk=sk_new(ca_dn_cmp)) == NULL)
1165 {
1166 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1167 goto err;
1168 }
1169
1170 /* get the certificate types */
1171 ctype_num= *(p++);
1172 if (ctype_num > SSL3_CT_NUMBER)
1173 ctype_num=SSL3_CT_NUMBER;
1174 for (i=0; i<ctype_num; i++)
1175 s->s3->tmp.ctype[i]= p[i];
1176 p+=ctype_num;
1177
1178 /* get the CA RDNs */
1179 n2s(p,llen);
dfeab068
RE		 1180#if 0
1181{
1182FILE *out;
1183out=fopen("/tmp/vsign.der","w");
1184fwrite(p,1,llen,out);
1185fclose(out);
1186}
1187#endif
1188
d02b48c6
RE		 1189 if ((llen+ctype_num+2+1) != n)
1190 {
58964a49 1191 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
d02b48c6
RE		 1192 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1193 goto err;
1194 }
1195
1196 for (nc=0; nc<llen; )
1197 {
1198 n2s(p,l);
1199 if ((l+nc+2) > llen)
1200 {
58964a49 1201 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
d02b48c6 1202 goto cont; /* netscape bugs */
58964a49 1203 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
d02b48c6
RE		 1204 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1205 goto err;
1206 }
1207
1208 q=p;
1209
1210 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1211 {
1212 /* If netscape tollerance is on, ignore errors */
58964a49 1213 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
d02b48c6
RE		 1214 goto cont;
1215 else
1216 {
58964a49 1217 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
d02b48c6
RE		 1218 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1219 goto err;
1220 }
1221 }
1222
1223 if (q != (p+l))
1224 {
58964a49 1225 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
d02b48c6
RE		 1226 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1227 goto err;
1228 }
1229 if (!sk_push(ca_sk,(char *)xn))
1230 {
1231 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1232 goto err;
1233 }
1234
1235 p+=l;
1236 nc+=l+2;
1237 }
1238
1239 if (0)
1240 {
1241cont:
1242 ERR_clear_error();
1243 }
1244
1245 /* we should setup a certficate to return.... */
1246 s->s3->tmp.cert_req=1;
1247 s->s3->tmp.ctype_num=ctype_num;
1248 if (s->s3->tmp.ca_names != NULL)
1249 sk_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1250 s->s3->tmp.ca_names=ca_sk;
1251 ca_sk=NULL;
1252
1253 ret=1;
1254err:
1255 if (ca_sk != NULL) sk_pop_free(ca_sk,X509_NAME_free);
1256 return(ret);
1257 }
1258
1259static int ca_dn_cmp(a,b)
1260X509_NAME **a,**b;
1261 {
1262 return(X509_NAME_cmp(*a,*b));
1263 }
1264
1265static int ssl3_get_server_done(s)
1266SSL *s;
1267 {
1268 int ok,ret=0;
1269 long n;
1270
1271 n=ssl3_get_message(s,
1272 SSL3_ST_CR_SRVR_DONE_A,
1273 SSL3_ST_CR_SRVR_DONE_B,
1274 SSL3_MT_SERVER_DONE,
1275 30, /* should be very small, like 0 :-) */
1276 &ok);
1277
1278 if (!ok) return((int)n);
1279 if (n > 0)
1280 {
1281 /* should contain no data */
58964a49 1282 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
d02b48c6
RE		 1283 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1284 }
1285 ret=1;
1286 return(ret);
1287 }
1288
1289static int ssl3_send_client_key_exchange(s)
1290SSL *s;
1291 {
58964a49 1292 unsigned char *p,*q,*d;
d02b48c6
RE		 1293 int n;
1294 unsigned long l;
1295 EVP_PKEY *pkey=NULL;
1296
1297 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1298 {
1299 d=(unsigned char *)s->init_buf->data;
1300 p= &(d[4]);
1301
1302 l=s->s3->tmp.new_cipher->algorithms;
1303
1304#ifndef NO_RSA
1305 if (l & SSL_kRSA)
1306 {
1307 RSA *rsa;
dfeab068 1308 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
d02b48c6
RE		 1309
1310 if (s->session->cert->rsa_tmp != NULL)
1311 rsa=s->session->cert->rsa_tmp;
1312 else
1313 {
1314 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_RSA_ENC].x509);
1315 if ((pkey == NULL) ||
1316 (pkey->type != EVP_PKEY_RSA) ||
1317 (pkey->pkey.rsa == NULL))
1318 {
1319 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1320 goto err;
1321 }
1322 rsa=pkey->pkey.rsa;
1323 }
1324
58964a49
RE		 1325 tmp_buf[0]=s->version>>8;
1326 tmp_buf[1]=s->version&0xff;
d02b48c6
RE		 1327 RAND_bytes(&(tmp_buf[2]),SSL_MAX_MASTER_KEY_LENGTH-2);
1328
1329 s->session->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
1330
58964a49
RE		 1331 q=p;
1332 /* Fix buf for TLS and beyond */
1333 if (s->version > SSL3_VERSION)
1334 p+=2;
1335 n=RSA_public_encrypt(SSL_MAX_MASTER_KEY_LENGTH,
1336 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
dfeab068
RE		 1337#ifdef PKCS1_CHECK
1338 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1339 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1340#endif
d02b48c6
RE		 1341 if (n <= 0)
1342 {
1343 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1344 goto err;
1345 }
1346
58964a49
RE		 1347 /* Fix buf for TLS and beyond */
1348 if (s->version > SSL3_VERSION)
1349 {
1350 s2n(n,q);
1351 n+=2;
1352 }
1353
d02b48c6 1354 s->session->master_key_length=
58964a49 1355 s->method->ssl3_enc->generate_master_secret(s,
d02b48c6 1356 s->session->master_key,
dfeab068
RE		 1357 tmp_buf,SSL_MAX_MASTER_KEY_LENGTH);
1358 memset(tmp_buf,0,SSL_MAX_MASTER_KEY_LENGTH);
d02b48c6
RE		 1359 }
1360 else
1361#endif
1362#ifndef NO_DH
1363 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1364 {
1365 DH *dh_srvr,*dh_clnt;
1366
1367 if (s->session->cert->dh_tmp != NULL)
1368 dh_srvr=s->session->cert->dh_tmp;
1369 else
1370 {
1371 /* we get them from the cert */
58964a49 1372 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
d02b48c6
RE		 1373 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1374 goto err;
1375 }
1376
1377 /* generate a new random key */
1378 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1379 {
1380 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1381 goto err;
1382 }
1383 if (!DH_generate_key(dh_clnt))
1384 {
1385 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1386 goto err;
1387 }
1388
1389 /* use the 'p' output buffer for the DH key, but
1390 * make sure to clear it out afterwards */
58964a49 1391
d02b48c6 1392 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
58964a49 1393
d02b48c6
RE		 1394 if (n <= 0)
1395 {
1396 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1397 goto err;
1398 }
1399
1400 /* generate master key from the result */
1401 s->session->master_key_length=
58964a49 1402 s->method->ssl3_enc->generate_master_secret(s,
d02b48c6
RE		 1403 s->session->master_key,p,n);
1404 /* clean up */
1405 memset(p,0,n);
1406
1407 /* send off the data */
1408 n=BN_num_bytes(dh_clnt->pub_key);
1409 s2n(n,p);
1410 BN_bn2bin(dh_clnt->pub_key,p);
1411 n+=2;
1412
1413 DH_free(dh_clnt);
1414
1415 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1416 }
1417 else
1418#endif
1419 {
58964a49 1420 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
d02b48c6
RE		 1421 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1422 goto err;
1423 }
1424
1425 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1426 l2n3(n,d);
1427
1428 s->state=SSL3_ST_CW_KEY_EXCH_B;
1429 /* number of bytes to write */
1430 s->init_num=n+4;
1431 s->init_off=0;
1432 }
1433
1434 /* SSL3_ST_CW_KEY_EXCH_B */
1435 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1436err:
1437 return(-1);
1438 }
1439
1440static int ssl3_send_client_verify(s)
1441SSL *s;
1442 {
1443 unsigned char *p,*d;
1444 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1445 EVP_PKEY *pkey;
58964a49 1446 int i=0;
d02b48c6 1447 unsigned long n;
58964a49
RE		 1448#ifndef NO_DSA
1449 int j;
1450#endif
d02b48c6
RE		 1451
1452 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1453 {
1454 d=(unsigned char *)s->init_buf->data;
1455 p= &(d[4]);
1456 pkey=s->cert->key->privatekey;
1457
58964a49
RE		 1458 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
1459 &(data[MD5_DIGEST_LENGTH]));
d02b48c6
RE		 1460
1461#ifndef NO_RSA
1462 if (pkey->type == EVP_PKEY_RSA)
1463 {
58964a49
RE		 1464 s->method->ssl3_enc->cert_verify_mac(s,
1465 &(s->s3->finish_dgst1),&(data[0]));
d02b48c6
RE		 1466 i=RSA_private_encrypt(
1467 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1468 data,&(p[2]),pkey->pkey.rsa,
1469 RSA_PKCS1_PADDING);
1470 if (i <= 0)
1471 {
1472 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1473 goto err;
1474 }
1475 s2n(i,p);
1476 n=i+2;
1477 }
1478 else
1479#endif
1480#ifndef NO_DSA
1481 if (pkey->type == EVP_PKEY_DSA)
1482 {
1483 if (!DSA_sign(pkey->save_type,
1484 &(data[MD5_DIGEST_LENGTH]),
1485 SHA_DIGEST_LENGTH,&(p[2]),
1486 (unsigned int *)&j,pkey->pkey.dsa))
1487 {
1488 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1489 goto err;
1490 }
1491 s2n(j,p);
1492 n=j+2;
1493 }
1494 else
1495#endif
1496 {
1497 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,SSL_R_INTERNAL_ERROR);
1498 goto err;
1499 }
1500 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
1501 l2n3(n,d);
1502
1503 s->init_num=(int)n+4;
1504 s->init_off=0;
1505 }
1506 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1507err:
1508 return(-1);
1509 }
1510
1511static int ssl3_send_client_certificate(s)
1512SSL *s;
1513 {
1514 X509 *x509=NULL;
1515 EVP_PKEY *pkey=NULL;
1516 int i;
1517 unsigned long l;
1518
1519 if (s->state == SSL3_ST_CW_CERT_A)
1520 {
1521 if ((s->cert == NULL) ||
1522 (s->cert->key->x509 == NULL) ||
1523 (s->cert->key->privatekey == NULL))
1524 s->state=SSL3_ST_CW_CERT_B;
1525 else
1526 s->state=SSL3_ST_CW_CERT_C;
1527 }
1528
1529 /* We need to get a client cert */
1530 if (s->state == SSL3_ST_CW_CERT_B)
1531 {
1532 /* If we get an error, we need to
1533 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1534 * We then get retied later */
1535 i=0;
1536 if (s->ctx->client_cert_cb != NULL)
1537 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
1538 if (i < 0)
1539 {
1540 s->rwstate=SSL_X509_LOOKUP;
1541 return(-1);
1542 }
1543 s->rwstate=SSL_NOTHING;
1544 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1545 {
1546 s->state=SSL3_ST_CW_CERT_B;
1547 if ( !SSL_use_certificate(s,x509) ||
1548 !SSL_use_PrivateKey(s,pkey))
1549 i=0;
1550 }
1551 else if (i == 1)
1552 {
1553 i=0;
1554 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1555 }
1556
1557 if (x509 != NULL) X509_free(x509);
1558 if (pkey != NULL) EVP_PKEY_free(pkey);
1559 if (i == 0)
1560 {
58964a49
RE		 1561 if (s->version == SSL3_VERSION)
1562 {
1563 s->s3->tmp.cert_req=0;
1564 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1565 return(1);
1566 }
1567 else
1568 {
1569 s->s3->tmp.cert_req=2;
1570 }
d02b48c6
RE		 1571 }
1572
1573 /* Ok, we have a cert */
1574 s->state=SSL3_ST_CW_CERT_C;
1575 }
1576
1577 if (s->state == SSL3_ST_CW_CERT_C)
1578 {
1579 s->state=SSL3_ST_CW_CERT_D;
58964a49
RE		 1580 l=ssl3_output_cert_chain(s,
1581 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
d02b48c6
RE		 1582 s->init_num=(int)l;
1583 s->init_off=0;
1584 }
1585 /* SSL3_ST_CW_CERT_D */
1586 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1587 }
1588
1589#define has_bits(i,m) (((i)&(m)) == (m))
1590
1591static int ssl3_check_cert_and_algorithm(s)
1592SSL *s;
1593 {
1594 int i,idx;
1595 long algs;
1596 EVP_PKEY *pkey=NULL;
1597 CERT *c;
1598 RSA *rsa;
1599 DH *dh;
1600
1601 c=s->session->cert;
1602
1603 if (c == NULL)
1604 {
1605 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_INTERNAL_ERROR);
1606 goto err;
1607 }
1608
1609 algs=s->s3->tmp.new_cipher->algorithms;
1610
1611 /* we don't have a certificate */
1612 if (algs & (SSL_aDH|SSL_aNULL))
1613 return(1);
1614
1615 rsa=s->session->cert->rsa_tmp;
1616 dh=s->session->cert->dh_tmp;
1617
1618 /* This is the passed certificate */
1619
1620 idx=c->cert_type;
1621 pkey=X509_get_pubkey(c->pkeys[idx].x509);
1622 i=X509_certificate_type(c->pkeys[idx].x509,pkey);
1623
1624
1625 /* Check that we have a certificate if we require one */
1626 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
1627 {
1628 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
1629 goto f_err;
1630 }
1631#ifndef NO_DSA
1632 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
1633 {
1634 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
1635 goto f_err;
1636 }
1637#endif
1638
1639 if ((algs & SSL_kRSA) &&
1640 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
1641 {
1642 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
1643 goto f_err;
1644 }
1645#ifndef NO_DH
1646 else if ((algs & SSL_kEDH) &&
1647 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
1648 {
1649 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
1650 goto f_err;
1651 }
1652 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
1653 {
1654 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
1655 goto f_err;
1656 }
1657#ifndef NO_DSA
1658 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
1659 {
1660 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
1661 goto f_err;
1662 }
1663#endif
1664#endif
1665
1666 if ((algs & SSL_EXP) && !has_bits(i,EVP_PKT_EXP))
1667 {
1668#ifndef NO_RSA
1669 if (algs & SSL_kRSA)
1670 {
1671 if ((rsa == NULL) || (RSA_size(rsa) > 512))
1672 {
1673 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
1674 goto f_err;
1675 }
1676 }
1677 else
1678#endif
1679#ifndef NO_DH
1680 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1681 {
1682 if ((dh == NULL) || (DH_size(dh) > 512))
1683 {
1684 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
1685 goto f_err;
1686 }
1687 }
1688 else
1689#endif
1690 {
1691 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1692 goto f_err;
1693 }
1694 }
1695 return(1);
1696f_err:
58964a49 1697 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
d02b48c6
RE		 1698err:
1699 return(0);
1700 }
1701
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