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Add support for new TLS export ciphersuites.
[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
9b3086fe 77static SSL_METHOD *ssl3_get_client_method(int ver);
d02b48c6
RE		 78static int ssl3_client_hello(SSL *s);
79static int ssl3_get_server_hello(SSL *s);
80static int ssl3_get_certificate_request(SSL *s);
81static int ca_dn_cmp(X509_NAME **a,X509_NAME **b);
82static int ssl3_get_server_done(SSL *s);
83static int ssl3_send_client_verify(SSL *s);
84static int ssl3_send_client_certificate(SSL *s);
85static int ssl3_send_client_key_exchange(SSL *s);
86static int ssl3_get_key_exchange(SSL *s);
87static int ssl3_get_server_certificate(SSL *s);
88static int ssl3_check_cert_and_algorithm(SSL *s);
89#else
9b3086fe 90static SSL_METHOD *ssl3_get_client_method();
d02b48c6
RE		 91static int ssl3_client_hello();
92static int ssl3_get_server_hello();
93static int ssl3_get_certificate_request();
94static int ca_dn_cmp();
95static int ssl3_get_server_done();
96static int ssl3_send_client_verify();
97static int ssl3_send_client_certificate();
98static int ssl3_send_client_key_exchange();
99static int ssl3_get_key_exchange();
100static int ssl3_get_server_certificate();
101static int ssl3_check_cert_and_algorithm();
102#endif
103
104static SSL_METHOD *ssl3_get_client_method(ver)
105int ver;
106 {
58964a49 107 if (ver == SSL3_VERSION)
d02b48c6
RE		 108 return(SSLv3_client_method());
109 else
110 return(NULL);
111 }
112
113SSL_METHOD *SSLv3_client_method()
114 {
115 static int init=1;
116 static SSL_METHOD SSLv3_client_data;
117
118 if (init)
119 {
120 init=0;
121 memcpy((char *)&SSLv3_client_data,(char *)sslv3_base_method(),
122 sizeof(SSL_METHOD));
123 SSLv3_client_data.ssl_connect=ssl3_connect;
124 SSLv3_client_data.get_ssl_method=ssl3_get_client_method;
125 }
126 return(&SSLv3_client_data);
127 }
128
129int ssl3_connect(s)
130SSL *s;
131 {
132 BUF_MEM *buf;
133 unsigned long Time=time(NULL),l;
134 long num1;
135 void (*cb)()=NULL;
136 int ret= -1;
d02b48c6
RE		 137 int new_state,state,skip=0;;
138
bf5dcd13 139 RAND_seed(&Time,sizeof(Time));
d02b48c6 140 ERR_clear_error();
58964a49 141 clear_sys_error();
d02b48c6
RE		 142
143 if (s->info_callback != NULL)
144 cb=s->info_callback;
145 else if (s->ctx->info_callback != NULL)
146 cb=s->ctx->info_callback;
147
148 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
149 s->in_handshake++;
150
151 for (;;)
152 {
153 state=s->state;
154
155 switch(s->state)
156 {
157 case SSL_ST_RENEGOTIATE:
158 s->new_session=1;
159 s->state=SSL_ST_CONNECT;
413c4f45 160 s->ctx->stats.sess_connect_renegotiate++;
d02b48c6
RE		 161 /* break */
162 case SSL_ST_BEFORE:
163 case SSL_ST_CONNECT:
164 case SSL_ST_BEFORE|SSL_ST_CONNECT:
165 case SSL_ST_OK|SSL_ST_CONNECT:
166
413c4f45 167 s->server=0;
d02b48c6
RE		 168 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
169
58964a49
RE		 170 if ((s->version & 0xff00 ) != 0x0300)
171 abort();
172 /* s->version=SSL3_VERSION; */
d02b48c6
RE		 173 s->type=SSL_ST_CONNECT;
174
175 if (s->init_buf == NULL)
176 {
177 if ((buf=BUF_MEM_new()) == NULL)
178 {
179 ret= -1;
180 goto end;
181 }
182 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
183 {
184 ret= -1;
185 goto end;
186 }
187 s->init_buf=buf;
188 }
189
190 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
191
192 /* setup buffing BIO */
58964a49 193 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
d02b48c6
RE		 194
195 /* don't push the buffering BIO quite yet */
196
197 ssl3_init_finished_mac(s);
198
199 s->state=SSL3_ST_CW_CLNT_HELLO_A;
413c4f45 200 s->ctx->stats.sess_connect++;
d02b48c6
RE		 201 s->init_num=0;
202 break;
203
204 case SSL3_ST_CW_CLNT_HELLO_A:
205 case SSL3_ST_CW_CLNT_HELLO_B:
206
207 s->shutdown=0;
208 ret=ssl3_client_hello(s);
209 if (ret <= 0) goto end;
210 s->state=SSL3_ST_CR_SRVR_HELLO_A;
211 s->init_num=0;
212
213 /* turn on buffering for the next lot of output */
58964a49
RE		 214 if (s->bbio != s->wbio)
215 s->wbio=BIO_push(s->bbio,s->wbio);
d02b48c6
RE		 216
217 break;
218
219 case SSL3_ST_CR_SRVR_HELLO_A:
220 case SSL3_ST_CR_SRVR_HELLO_B:
221 ret=ssl3_get_server_hello(s);
222 if (ret <= 0) goto end;
223 if (s->hit)
224 s->state=SSL3_ST_CR_FINISHED_A;
225 else
226 s->state=SSL3_ST_CR_CERT_A;
227 s->init_num=0;
228 break;
229
230 case SSL3_ST_CR_CERT_A:
231 case SSL3_ST_CR_CERT_B:
232 /* Check if it is anon DH */
233 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
234 {
235 ret=ssl3_get_server_certificate(s);
236 if (ret <= 0) goto end;
237 }
238 else
239 skip=1;
240 s->state=SSL3_ST_CR_KEY_EXCH_A;
241 s->init_num=0;
242 break;
243
244 case SSL3_ST_CR_KEY_EXCH_A:
245 case SSL3_ST_CR_KEY_EXCH_B:
246 ret=ssl3_get_key_exchange(s);
247 if (ret <= 0) goto end;
248 s->state=SSL3_ST_CR_CERT_REQ_A;
249 s->init_num=0;
250
251 /* at this point we check that we have the
252 * required stuff from the server */
253 if (!ssl3_check_cert_and_algorithm(s))
254 {
255 ret= -1;
256 goto end;
257 }
258 break;
259
260 case SSL3_ST_CR_CERT_REQ_A:
261 case SSL3_ST_CR_CERT_REQ_B:
262 ret=ssl3_get_certificate_request(s);
263 if (ret <= 0) goto end;
264 s->state=SSL3_ST_CR_SRVR_DONE_A;
265 s->init_num=0;
266 break;
267
268 case SSL3_ST_CR_SRVR_DONE_A:
269 case SSL3_ST_CR_SRVR_DONE_B:
270 ret=ssl3_get_server_done(s);
271 if (ret <= 0) goto end;
272 if (s->s3->tmp.cert_req)
273 s->state=SSL3_ST_CW_CERT_A;
274 else
275 s->state=SSL3_ST_CW_KEY_EXCH_A;
276 s->init_num=0;
277
278 break;
279
280 case SSL3_ST_CW_CERT_A:
281 case SSL3_ST_CW_CERT_B:
282 case SSL3_ST_CW_CERT_C:
283 ret=ssl3_send_client_certificate(s);
284 if (ret <= 0) goto end;
285 s->state=SSL3_ST_CW_KEY_EXCH_A;
286 s->init_num=0;
287 break;
288
289 case SSL3_ST_CW_KEY_EXCH_A:
290 case SSL3_ST_CW_KEY_EXCH_B:
291 ret=ssl3_send_client_key_exchange(s);
292 if (ret <= 0) goto end;
293 l=s->s3->tmp.new_cipher->algorithms;
294 /* EAY EAY EAY need to check for DH fix cert
295 * sent back */
58964a49
RE		 296 /* For TLS, cert_req is set to 2, so a cert chain
297 * of nothing is sent, but no verify packet is sent */
298 if (s->s3->tmp.cert_req == 1)
d02b48c6
RE		 299 {
300 s->state=SSL3_ST_CW_CERT_VRFY_A;
301 }
302 else
303 {
304 s->state=SSL3_ST_CW_CHANGE_A;
305 s->s3->change_cipher_spec=0;
306 }
307
308 s->init_num=0;
309 break;
310
311 case SSL3_ST_CW_CERT_VRFY_A:
312 case SSL3_ST_CW_CERT_VRFY_B:
313 ret=ssl3_send_client_verify(s);
314 if (ret <= 0) goto end;
315 s->state=SSL3_ST_CW_CHANGE_A;
316 s->init_num=0;
317 s->s3->change_cipher_spec=0;
318 break;
319
320 case SSL3_ST_CW_CHANGE_A:
321 case SSL3_ST_CW_CHANGE_B:
322 ret=ssl3_send_change_cipher_spec(s,
323 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
324 if (ret <= 0) goto end;
325 s->state=SSL3_ST_CW_FINISHED_A;
326 s->init_num=0;
327
328 s->session->cipher=s->s3->tmp.new_cipher;
413c4f45
MC		 329 if (s->s3->tmp.new_compression == NULL)
330 s->session->compress_meth=0;
331 else
332 s->session->compress_meth=
333 s->s3->tmp.new_compression->id;
58964a49 334 if (!s->method->ssl3_enc->setup_key_block(s))
d02b48c6
RE		 335 {
336 ret= -1;
337 goto end;
338 }
339
58964a49 340 if (!s->method->ssl3_enc->change_cipher_state(s,
d02b48c6
RE		 341 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
342 {
343 ret= -1;
344 goto end;
345 }
346
347 break;
348
349 case SSL3_ST_CW_FINISHED_A:
350 case SSL3_ST_CW_FINISHED_B:
351 ret=ssl3_send_finished(s,
352 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
58964a49
RE		 353 s->method->ssl3_enc->client_finished,
354 s->method->ssl3_enc->client_finished_len);
d02b48c6
RE		 355 if (ret <= 0) goto end;
356 s->state=SSL3_ST_CW_FLUSH;
357
358 /* clear flags */
359 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
360 if (s->hit)
361 {
362 s->s3->tmp.next_state=SSL_ST_OK;
363 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
364 {
365 s->state=SSL_ST_OK;
366 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
367 s->s3->delay_buf_pop_ret=0;
368 }
369 }
370 else
371 {
372 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
373 }
374 s->init_num=0;
375 break;
376
377 case SSL3_ST_CR_FINISHED_A:
378 case SSL3_ST_CR_FINISHED_B:
379
380 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
58964a49 381 SSL3_ST_CR_FINISHED_B);
d02b48c6
RE		 382 if (ret <= 0) goto end;
383
384 if (s->hit)
385 s->state=SSL3_ST_CW_CHANGE_A;
386 else
387 s->state=SSL_ST_OK;
388 s->init_num=0;
389 break;
390
391 case SSL3_ST_CW_FLUSH:
392 /* number of bytes to be flushed */
393 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
394 if (num1 > 0)
395 {
396 s->rwstate=SSL_WRITING;
397 num1=BIO_flush(s->wbio);
398 if (num1 <= 0) { ret= -1; goto end; }
399 s->rwstate=SSL_NOTHING;
400 }
401
402 s->state=s->s3->tmp.next_state;
403 break;
404
405 case SSL_ST_OK:
406 /* clean a few things up */
407 ssl3_cleanup_key_block(s);
408
413c4f45 409 if (s->init_buf != NULL)
d02b48c6 410 {
413c4f45
MC		 411 BUF_MEM_free(s->init_buf);
412 s->init_buf=NULL;
d02b48c6 413 }
413c4f45
MC		 414
415 /* If we are not 'joining' the last two packets,
416 * remove the buffering now */
417 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
418 ssl_free_wbio_buffer(s);
419 /* else do it later in ssl3_write */
d02b48c6
RE		 420
421 s->init_num=0;
422 s->new_session=0;
423
424 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
413c4f45 425 if (s->hit) s->ctx->stats.sess_hit++;
d02b48c6
RE		 426
427 ret=1;
428 /* s->server=0; */
429 s->handshake_func=ssl3_connect;
413c4f45 430 s->ctx->stats.sess_connect_good++;
d02b48c6
RE		 431
432 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
433
434 goto end;
dfeab068 435 /* break; */
d02b48c6
RE		 436
437 default:
438 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
439 ret= -1;
440 goto end;
441 /* break; */
442 }
443
444 /* did we do anything */
445 if (!s->s3->tmp.reuse_message && !skip)
446 {
58964a49
RE		 447 if (s->debug)
448 {
449 if ((ret=BIO_flush(s->wbio)) <= 0)
450 goto end;
451 }
d02b48c6
RE		 452
453 if ((cb != NULL) && (s->state != state))
454 {
455 new_state=s->state;
456 s->state=state;
457 cb(s,SSL_CB_CONNECT_LOOP,1);
458 s->state=new_state;
459 }
460 }
461 skip=0;
462 }
463end:
464 if (cb != NULL)
465 cb(s,SSL_CB_CONNECT_EXIT,ret);
466 s->in_handshake--;
467 return(ret);
468 }
469
470
471static int ssl3_client_hello(s)
472SSL *s;
473 {
474 unsigned char *buf;
475 unsigned char *p,*d;
413c4f45 476 int i,j;
d02b48c6 477 unsigned long Time,l;
413c4f45 478 SSL_COMP *comp;
d02b48c6
RE		 479
480 buf=(unsigned char *)s->init_buf->data;
481 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
482 {
483 if ((s->session == NULL) ||
dfeab068
RE		 484 (s->session->ssl_version != s->version) ||
485 (s->session->not_resumable))
d02b48c6
RE		 486 {
487 if (!ssl_get_new_session(s,0))
488 goto err;
489 }
490 /* else use the pre-loaded session */
491
492 p=s->s3->client_random;
493 Time=time(NULL); /* Time */
494 l2n(Time,p);
dfeab068 495 RAND_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
d02b48c6
RE		 496
497 /* Do the message type and length last */
498 d=p= &(buf[4]);
499
58964a49
RE		 500 *(p++)=s->version>>8;
501 *(p++)=s->version&0xff;
413c4f45 502 s->client_version=s->version;
d02b48c6
RE		 503
504 /* Random stuff */
505 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
506 p+=SSL3_RANDOM_SIZE;
507
508 /* Session ID */
509 if (s->new_session)
510 i=0;
511 else
512 i=s->session->session_id_length;
513 *(p++)=i;
514 if (i != 0)
515 {
516 memcpy(p,s->session->session_id,i);
517 p+=i;
518 }
519
520 /* Ciphers supported */
521 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]));
522 if (i == 0)
523 {
524 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
525 goto err;
526 }
527 s2n(i,p);
528 p+=i;
529
dfeab068 530 /* COMPRESSION */
413c4f45
MC		 531 if (s->ctx->comp_methods == NULL)
532 j=0;
533 else
534 j=sk_num(s->ctx->comp_methods);
535 *(p++)=1+j;
536 for (i=0; i<j; i++)
537 {
538 comp=(SSL_COMP *)sk_value(s->ctx->comp_methods,i);
539 *(p++)=comp->id;
540 }
541 *(p++)=0; /* Add the NULL method */
d02b48c6
RE		 542
543 l=(p-d);
544 d=buf;
545 *(d++)=SSL3_MT_CLIENT_HELLO;
546 l2n3(l,d);
547
548 s->state=SSL3_ST_CW_CLNT_HELLO_B;
549 /* number of bytes to write */
550 s->init_num=p-buf;
551 s->init_off=0;
552 }
553
554 /* SSL3_ST_CW_CLNT_HELLO_B */
555 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
556err:
557 return(-1);
558 }
559
560static int ssl3_get_server_hello(s)
561SSL *s;
562 {
563 STACK *sk;
564 SSL_CIPHER *c;
565 unsigned char *p,*d;
566 int i,al,ok;
567 unsigned int j;
568 long n;
413c4f45 569 SSL_COMP *comp;
d02b48c6
RE		 570
571 n=ssl3_get_message(s,
572 SSL3_ST_CR_SRVR_HELLO_A,
573 SSL3_ST_CR_SRVR_HELLO_B,
574 SSL3_MT_SERVER_HELLO,
575 300, /* ?? */
576 &ok);
577
578 if (!ok) return((int)n);
579 d=p=(unsigned char *)s->init_buf->data;
580
58964a49 581 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
d02b48c6
RE		 582 {
583 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
58964a49
RE		 584 s->version=(s->version&0xff00)|p[1];
585 al=SSL_AD_PROTOCOL_VERSION;
586 goto f_err;
d02b48c6
RE		 587 }
588 p+=2;
589
590 /* load the server hello data */
591 /* load the server random */
592 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
593 p+=SSL3_RANDOM_SIZE;
594
595 /* get the session-id */
596 j= *(p++);
597
598 if ((j != 0) && (j != SSL3_SESSION_ID_SIZE))
599 {
600 /* SSLref returns 16 :-( */
601 if (j < SSL2_SSL_SESSION_ID_LENGTH)
602 {
58964a49 603 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 604 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_SHORT);
605 goto f_err;
606 }
607 }
58964a49 608 if ((j != 0) && (j == s->session->session_id_length) &&
d02b48c6
RE		 609 (memcmp(p,s->session->session_id,j) == 0))
610 s->hit=1;
58964a49 611 else /* a miss or crap from the other end */
d02b48c6 612 {
58964a49
RE		 613 /* If we were trying for session-id reuse, make a new
614 * SSL_SESSION so we don't stuff up other people */
d02b48c6 615 s->hit=0;
58964a49
RE		 616 if (s->session->session_id_length > 0)
617 {
618 if (!ssl_get_new_session(s,0))
619 {
620 al=SSL_AD_INTERNAL_ERROR;
621 goto f_err;
622 }
623 }
624 s->session->session_id_length=j;
625 memcpy(s->session->session_id,p,j); /* j could be 0 */
d02b48c6
RE		 626 }
627 p+=j;
628 c=ssl_get_cipher_by_char(s,p);
629 if (c == NULL)
630 {
631 /* unknown cipher */
58964a49 632 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 633 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
634 goto f_err;
635 }
636 p+=ssl_put_cipher_by_char(s,NULL,NULL);
637
638 sk=ssl_get_ciphers_by_id(s);
639 i=sk_find(sk,(char *)c);
640 if (i < 0)
641 {
642 /* we did not say we would use this cipher */
58964a49 643 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 644 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
645 goto f_err;
646 }
647
648 if (s->hit && (s->session->cipher != c))
649 {
58964a49 650 if (!(s->options &
d02b48c6
RE		 651 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
652 {
58964a49 653 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 654 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
655 goto f_err;
656 }
657 }
658 s->s3->tmp.new_cipher=c;
659
660 /* lets get the compression algorithm */
dfeab068 661 /* COMPRESSION */
d02b48c6 662 j= *(p++);
413c4f45
MC		 663 if (j == 0)
664 comp=NULL;
665 else
666 comp=ssl3_comp_find(s->ctx->comp_methods,j);
667
668 if ((j != 0) && (comp == NULL))
d02b48c6 669 {
58964a49 670 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 671 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
672 goto f_err;
673 }
413c4f45
MC		 674 else
675 {
676 s->s3->tmp.new_compression=comp;
677 }
d02b48c6
RE		 678
679 if (p != (d+n))
680 {
681 /* wrong packet length */
58964a49 682 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 683 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
684 goto err;
685 }
686
687 return(1);
688f_err:
689 ssl3_send_alert(s,SSL3_AL_FATAL,al);
690err:
691 return(-1);
692 }
693
694static int ssl3_get_server_certificate(s)
695SSL *s;
696 {
697 int al,i,ok,ret= -1;
698 unsigned long n,nc,llen,l;
699 X509 *x=NULL;
700 unsigned char *p,*d,*q;
701 STACK *sk=NULL;
702 CERT *c;
703 EVP_PKEY *pkey=NULL;
704
705 n=ssl3_get_message(s,
706 SSL3_ST_CR_CERT_A,
707 SSL3_ST_CR_CERT_B,
708 -1,
709#if defined(MSDOS) && !defined(WIN32)
710 1024*30, /* 30k max cert list :-) */
711#else
712 1024*100, /* 100k max cert list :-) */
713#endif
714 &ok);
715
716 if (!ok) return((int)n);
717
718 if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE)
719 {
720 s->s3->tmp.reuse_message=1;
721 return(1);
722 }
723
724 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
725 {
58964a49 726 al=SSL_AD_UNEXPECTED_MESSAGE;
d02b48c6
RE		 727 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
728 goto f_err;
729 }
730 d=p=(unsigned char *)s->init_buf->data;
731
732 if ((sk=sk_new_null()) == NULL)
733 {
734 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
735 goto err;
736 }
737
738 n2l3(p,llen);
739 if (llen+3 != n)
740 {
58964a49 741 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 742 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
743 goto f_err;
744 }
745 for (nc=0; nc<llen; )
746 {
747 n2l3(p,l);
748 if ((l+nc+3) > llen)
749 {
58964a49 750 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 751 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
752 goto f_err;
753 }
754
755 q=p;
756 x=d2i_X509(NULL,&q,l);
757 if (x == NULL)
758 {
58964a49 759 al=SSL_AD_BAD_CERTIFICATE;
d02b48c6
RE		 760 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
761 goto f_err;
762 }
763 if (q != (p+l))
764 {
58964a49 765 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 766 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
767 goto f_err;
768 }
769 if (!sk_push(sk,(char *)x))
770 {
771 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
772 goto err;
773 }
774 x=NULL;
775 nc+=l+3;
776 p=q;
777 }
778
779 i=ssl_verify_cert_chain(s,sk);
780 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i))
781 {
782 al=ssl_verify_alarm_type(s->verify_result);
783 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
784 goto f_err;
785 }
786
787 c=ssl_cert_new();
788 if (c == NULL) goto err;
789
790 if (s->session->cert) ssl_cert_free(s->session->cert);
791 s->session->cert=c;
792
793 c->cert_chain=sk;
794 x=(X509 *)sk_value(sk,0);
795 sk=NULL;
796
797 pkey=X509_get_pubkey(x);
798
dfeab068 799 if ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))
d02b48c6
RE		 800 {
801 x=NULL;
802 al=SSL3_AL_FATAL;
803 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
804 goto f_err;
805 }
806
807 i=ssl_cert_type(x,pkey);
808 if (i < 0)
809 {
810 x=NULL;
811 al=SSL3_AL_FATAL;
812 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNKNOWN_CERTIFICATE_TYPE);
813 goto f_err;
814 }
815
816 c->cert_type=i;
58964a49 817 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
d02b48c6
RE		 818 if (c->pkeys[i].x509 != NULL)
819 X509_free(c->pkeys[i].x509);
820 c->pkeys[i].x509=x;
821 c->key= &(c->pkeys[i]);
822
823 if ((s->session != NULL) && (s->session->peer != NULL))
824 X509_free(s->session->peer);
58964a49 825 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
d02b48c6
RE		 826 s->session->peer=x;
827
828 x=NULL;
829 ret=1;
830
831 if (0)
832 {
833f_err:
834 ssl3_send_alert(s,SSL3_AL_FATAL,al);
835 }
836err:
a8236c8c
DSH		 837 EVP_PKEY_free(pkey);
838 X509_free(x);
839 sk_pop_free(sk,X509_free);
d02b48c6
RE		 840 return(ret);
841 }
842
843static int ssl3_get_key_exchange(s)
844SSL *s;
845 {
846#ifndef NO_RSA
847 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
848#endif
849 EVP_MD_CTX md_ctx;
850 unsigned char *param,*p;
851 int al,i,j,param_len,ok;
852 long n,alg;
853 EVP_PKEY *pkey=NULL;
854 RSA *rsa=NULL;
58964a49 855#ifndef NO_DH
d02b48c6 856 DH *dh=NULL;
58964a49 857#endif
d02b48c6
RE		 858
859 n=ssl3_get_message(s,
860 SSL3_ST_CR_KEY_EXCH_A,
861 SSL3_ST_CR_KEY_EXCH_B,
862 -1,
863 1024*8, /* ?? */
864 &ok);
865
866 if (!ok) return((int)n);
867
868 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
869 {
870 s->s3->tmp.reuse_message=1;
871 return(1);
872 }
873
874 param=p=(unsigned char *)s->init_buf->data;
875
876 if (s->session->cert != NULL)
877 {
878#ifndef NO_RSA
879 if (s->session->cert->rsa_tmp != NULL)
880 {
881 RSA_free(s->session->cert->rsa_tmp);
882 s->session->cert->rsa_tmp=NULL;
883 }
884#endif
885#ifndef NO_DH
886 if (s->session->cert->dh_tmp)
887 {
888 DH_free(s->session->cert->dh_tmp);
889 s->session->cert->dh_tmp=NULL;
890 }
891#endif
892 }
893 else
894 {
895 s->session->cert=ssl_cert_new();
896 }
897
898 param_len=0;
899 alg=s->s3->tmp.new_cipher->algorithms;
900
901#ifndef NO_RSA
902 if (alg & SSL_kRSA)
903 {
904 if ((rsa=RSA_new()) == NULL)
905 {
906 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
907 goto err;
908 }
909 n2s(p,i);
910 param_len=i+2;
911 if (param_len > n)
912 {
58964a49 913 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 914 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
915 goto f_err;
916 }
917 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
918 {
919 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
920 goto err;
921 }
922 p+=i;
923
924 n2s(p,i);
925 param_len+=i+2;
926 if (param_len > n)
927 {
58964a49 928 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 929 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
930 goto f_err;
931 }
932 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
933 {
934 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
935 goto err;
936 }
937 p+=i;
938 n-=param_len;
939
940/* s->session->cert->rsa_tmp=rsa;*/
941 /* this should be because we are using an export cipher */
942 if (alg & SSL_aRSA)
943 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_RSA_ENC].x509);
944 else
945 {
946 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
947 goto err;
948 }
949 s->session->cert->rsa_tmp=rsa;
950 }
951 else
952#endif
953#ifndef NO_DH
954 if (alg & SSL_kEDH)
955 {
956 if ((dh=DH_new()) == NULL)
957 {
958 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
959 goto err;
960 }
961 n2s(p,i);
962 param_len=i+2;
963 if (param_len > n)
964 {
58964a49 965 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 966 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
967 goto f_err;
968 }
969 if (!(dh->p=BN_bin2bn(p,i,NULL)))
970 {
971 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
972 goto err;
973 }
974 p+=i;
975
976 n2s(p,i);
977 param_len+=i+2;
978 if (param_len > n)
979 {
58964a49 980 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 981 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
982 goto f_err;
983 }
984 if (!(dh->g=BN_bin2bn(p,i,NULL)))
985 {
986 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
987 goto err;
988 }
989 p+=i;
990
991 n2s(p,i);
992 param_len+=i+2;
993 if (param_len > n)
994 {
58964a49 995 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 996 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
997 goto f_err;
998 }
999 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1000 {
1001 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1002 goto err;
1003 }
1004 p+=i;
1005 n-=param_len;
1006
1007#ifndef NO_RSA
1008 if (alg & SSL_aRSA)
1009 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_RSA_ENC].x509);
1010 else
1011#endif
1012#ifndef NO_DSA
1013 if (alg & SSL_aDSS)
1014 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_DSA_SIGN].x509);
1015#endif
1016 /* else anonymous DH, so no certificate or pkey. */
1017
1018 s->session->cert->dh_tmp=dh;
413c4f45 1019 dh=NULL;
d02b48c6
RE		 1020 }
1021 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
1022 {
58964a49 1023 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 1024 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1025 goto f_err;
1026 }
1027#endif
dfeab068
RE		 1028 if (alg & SSL_aFZA)
1029 {
1030 al=SSL_AD_HANDSHAKE_FAILURE;
1031 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1032 goto f_err;
1033 }
1034
d02b48c6
RE		 1035
1036 /* p points to the next byte, there are 'n' bytes left */
1037
1038
1039 /* if it was signed, check the signature */
1040 if (pkey != NULL)
1041 {
1042 n2s(p,i);
1043 n-=2;
1044 j=EVP_PKEY_size(pkey);
1045
1046 if ((i != n) || (n > j) || (n <= 0))
1047 {
1048 /* wrong packet length */
58964a49 1049 al=SSL_AD_DECODE_ERROR;
d02b48c6 1050 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
dfeab068 1051 goto f_err;
d02b48c6
RE		 1052 }
1053
1054#ifndef NO_RSA
1055 if (pkey->type == EVP_PKEY_RSA)
1056 {
1057 int num;
1058
1059 j=0;
1060 q=md_buf;
1061 for (num=2; num > 0; num--)
1062 {
58964a49
RE		 1063 EVP_DigestInit(&md_ctx,(num == 2)
1064 ?s->ctx->md5:s->ctx->sha1);
d02b48c6
RE		 1065 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1066 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1067 EVP_DigestUpdate(&md_ctx,param,param_len);
1068 EVP_DigestFinal(&md_ctx,q,(unsigned int *)&i);
1069 q+=i;
1070 j+=i;
1071 }
1072 i=RSA_public_decrypt((int)n,p,p,pkey->pkey.rsa,
1073 RSA_PKCS1_PADDING);
1074 if (i <= 0)
1075 {
58964a49 1076 al=SSL_AD_DECRYPT_ERROR;
d02b48c6
RE		 1077 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1078 goto f_err;
1079 }
1080 if ((j != i) || (memcmp(p,md_buf,i) != 0))
1081 {
1082 /* bad signature */
58964a49 1083 al=SSL_AD_DECRYPT_ERROR;
d02b48c6
RE		 1084 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1085 goto f_err;
1086 }
1087 }
1088 else
1089#endif
1090#ifndef NO_DSA
1091 if (pkey->type == EVP_PKEY_DSA)
1092 {
1093 /* lets do DSS */
1094 EVP_VerifyInit(&md_ctx,EVP_dss1());
1095 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1096 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1097 EVP_VerifyUpdate(&md_ctx,param,param_len);
1098 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1099 {
1100 /* bad signature */
58964a49 1101 al=SSL_AD_DECRYPT_ERROR;
d02b48c6
RE		 1102 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1103 goto f_err;
1104 }
1105 }
1106 else
1107#endif
1108 {
1109 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1110 goto err;
1111 }
1112 }
1113 else
1114 {
1115 /* still data left over */
1116 if (!(alg & SSL_aNULL))
1117 {
1118 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1119 goto err;
1120 }
1121 if (n != 0)
1122 {
58964a49 1123 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 1124 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1125 goto f_err;
1126 }
1127 }
a8236c8c 1128 EVP_PKEY_free(pkey);
d02b48c6
RE		 1129 return(1);
1130f_err:
1131 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1132err:
a8236c8c 1133 EVP_PKEY_free(pkey);
d02b48c6
RE		 1134 return(-1);
1135 }
1136
1137static int ssl3_get_certificate_request(s)
1138SSL *s;
1139 {
1140 int ok,ret=0;
58964a49
RE		 1141 unsigned long n,nc,l;
1142 unsigned int llen,ctype_num,i;
d02b48c6
RE		 1143 X509_NAME *xn=NULL;
1144 unsigned char *p,*d,*q;
1145 STACK *ca_sk=NULL;
1146
1147 n=ssl3_get_message(s,
1148 SSL3_ST_CR_CERT_REQ_A,
1149 SSL3_ST_CR_CERT_REQ_B,
1150 -1,
1151#if defined(MSDOS) && !defined(WIN32)
1152 1024*30, /* 30k max cert list :-) */
1153#else
1154 1024*100, /* 100k max cert list :-) */
1155#endif
1156 &ok);
1157
1158 if (!ok) return((int)n);
1159
1160 s->s3->tmp.cert_req=0;
1161
1162 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1163 {
1164 s->s3->tmp.reuse_message=1;
1165 return(1);
1166 }
1167
1168 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1169 {
58964a49 1170 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
d02b48c6
RE		 1171 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1172 goto err;
1173 }
1174
58964a49
RE		 1175 /* TLS does not like anon-DH with client cert */
1176 if (s->version > SSL3_VERSION)
1177 {
1178 l=s->s3->tmp.new_cipher->algorithms;
1179 if (l & SSL_aNULL)
1180 {
1181 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1182 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1183 goto err;
1184 }
1185 }
1186
d02b48c6
RE		 1187 d=p=(unsigned char *)s->init_buf->data;
1188
1189 if ((ca_sk=sk_new(ca_dn_cmp)) == NULL)
1190 {
1191 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1192 goto err;
1193 }
1194
1195 /* get the certificate types */
1196 ctype_num= *(p++);
1197 if (ctype_num > SSL3_CT_NUMBER)
1198 ctype_num=SSL3_CT_NUMBER;
1199 for (i=0; i<ctype_num; i++)
1200 s->s3->tmp.ctype[i]= p[i];
1201 p+=ctype_num;
1202
1203 /* get the CA RDNs */
1204 n2s(p,llen);
dfeab068
RE		 1205#if 0
1206{
1207FILE *out;
1208out=fopen("/tmp/vsign.der","w");
1209fwrite(p,1,llen,out);
1210fclose(out);
1211}
1212#endif
1213
d02b48c6
RE		 1214 if ((llen+ctype_num+2+1) != n)
1215 {
58964a49 1216 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
d02b48c6
RE		 1217 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1218 goto err;
1219 }
1220
1221 for (nc=0; nc<llen; )
1222 {
1223 n2s(p,l);
1224 if ((l+nc+2) > llen)
1225 {
58964a49 1226 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
d02b48c6 1227 goto cont; /* netscape bugs */
58964a49 1228 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
d02b48c6
RE		 1229 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1230 goto err;
1231 }
1232
1233 q=p;
1234
1235 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1236 {
1237 /* If netscape tollerance is on, ignore errors */
58964a49 1238 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
d02b48c6
RE		 1239 goto cont;
1240 else
1241 {
58964a49 1242 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
d02b48c6
RE		 1243 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1244 goto err;
1245 }
1246 }
1247
1248 if (q != (p+l))
1249 {
58964a49 1250 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
d02b48c6
RE		 1251 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1252 goto err;
1253 }
1254 if (!sk_push(ca_sk,(char *)xn))
1255 {
1256 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1257 goto err;
1258 }
1259
1260 p+=l;
1261 nc+=l+2;
1262 }
1263
1264 if (0)
1265 {
1266cont:
1267 ERR_clear_error();
1268 }
1269
1270 /* we should setup a certficate to return.... */
1271 s->s3->tmp.cert_req=1;
1272 s->s3->tmp.ctype_num=ctype_num;
1273 if (s->s3->tmp.ca_names != NULL)
1274 sk_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1275 s->s3->tmp.ca_names=ca_sk;
1276 ca_sk=NULL;
1277
1278 ret=1;
1279err:
1280 if (ca_sk != NULL) sk_pop_free(ca_sk,X509_NAME_free);
1281 return(ret);
1282 }
1283
1284static int ca_dn_cmp(a,b)
1285X509_NAME **a,**b;
1286 {
1287 return(X509_NAME_cmp(*a,*b));
1288 }
1289
1290static int ssl3_get_server_done(s)
1291SSL *s;
1292 {
1293 int ok,ret=0;
1294 long n;
1295
1296 n=ssl3_get_message(s,
1297 SSL3_ST_CR_SRVR_DONE_A,
1298 SSL3_ST_CR_SRVR_DONE_B,
1299 SSL3_MT_SERVER_DONE,
1300 30, /* should be very small, like 0 :-) */
1301 &ok);
1302
1303 if (!ok) return((int)n);
1304 if (n > 0)
1305 {
1306 /* should contain no data */
58964a49 1307 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
d02b48c6
RE		 1308 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1309 }
1310 ret=1;
1311 return(ret);
1312 }
1313
1314static int ssl3_send_client_key_exchange(s)
1315SSL *s;
1316 {
58964a49 1317 unsigned char *p,*q,*d;
d02b48c6
RE		 1318 int n;
1319 unsigned long l;
1320 EVP_PKEY *pkey=NULL;
1321
1322 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1323 {
1324 d=(unsigned char *)s->init_buf->data;
1325 p= &(d[4]);
1326
1327 l=s->s3->tmp.new_cipher->algorithms;
1328
1329#ifndef NO_RSA
1330 if (l & SSL_kRSA)
1331 {
1332 RSA *rsa;
dfeab068 1333 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
d02b48c6
RE		 1334
1335 if (s->session->cert->rsa_tmp != NULL)
1336 rsa=s->session->cert->rsa_tmp;
1337 else
1338 {
1339 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_RSA_ENC].x509);
1340 if ((pkey == NULL) ||
1341 (pkey->type != EVP_PKEY_RSA) ||
1342 (pkey->pkey.rsa == NULL))
1343 {
1344 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1345 goto err;
1346 }
1347 rsa=pkey->pkey.rsa;
1348 }
1349
413c4f45
MC		 1350 tmp_buf[0]=s->client_version>>8;
1351 tmp_buf[1]=s->client_version&0xff;
d02b48c6
RE		 1352 RAND_bytes(&(tmp_buf[2]),SSL_MAX_MASTER_KEY_LENGTH-2);
1353
1354 s->session->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
1355
58964a49
RE		 1356 q=p;
1357 /* Fix buf for TLS and beyond */
1358 if (s->version > SSL3_VERSION)
1359 p+=2;
1360 n=RSA_public_encrypt(SSL_MAX_MASTER_KEY_LENGTH,
1361 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
dfeab068
RE		 1362#ifdef PKCS1_CHECK
1363 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1364 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1365#endif
d02b48c6
RE		 1366 if (n <= 0)
1367 {
1368 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1369 goto err;
1370 }
1371
58964a49
RE		 1372 /* Fix buf for TLS and beyond */
1373 if (s->version > SSL3_VERSION)
1374 {
1375 s2n(n,q);
1376 n+=2;
1377 }
1378
d02b48c6 1379 s->session->master_key_length=
58964a49 1380 s->method->ssl3_enc->generate_master_secret(s,
d02b48c6 1381 s->session->master_key,
dfeab068
RE		 1382 tmp_buf,SSL_MAX_MASTER_KEY_LENGTH);
1383 memset(tmp_buf,0,SSL_MAX_MASTER_KEY_LENGTH);
d02b48c6
RE		 1384 }
1385 else
1386#endif
1387#ifndef NO_DH
1388 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1389 {
1390 DH *dh_srvr,*dh_clnt;
1391
1392 if (s->session->cert->dh_tmp != NULL)
1393 dh_srvr=s->session->cert->dh_tmp;
1394 else
1395 {
1396 /* we get them from the cert */
58964a49 1397 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
d02b48c6
RE		 1398 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1399 goto err;
1400 }
1401
1402 /* generate a new random key */
1403 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1404 {
1405 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1406 goto err;
1407 }
1408 if (!DH_generate_key(dh_clnt))
1409 {
1410 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1411 goto err;
1412 }
1413
1414 /* use the 'p' output buffer for the DH key, but
1415 * make sure to clear it out afterwards */
58964a49 1416
d02b48c6 1417 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
58964a49 1418
d02b48c6
RE		 1419 if (n <= 0)
1420 {
1421 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1422 goto err;
1423 }
1424
1425 /* generate master key from the result */
1426 s->session->master_key_length=
58964a49 1427 s->method->ssl3_enc->generate_master_secret(s,
d02b48c6
RE		 1428 s->session->master_key,p,n);
1429 /* clean up */
1430 memset(p,0,n);
1431
1432 /* send off the data */
1433 n=BN_num_bytes(dh_clnt->pub_key);
1434 s2n(n,p);
1435 BN_bn2bin(dh_clnt->pub_key,p);
1436 n+=2;
1437
1438 DH_free(dh_clnt);
1439
1440 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1441 }
1442 else
1443#endif
1444 {
58964a49 1445 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
d02b48c6
RE		 1446 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1447 goto err;
1448 }
1449
1450 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1451 l2n3(n,d);
1452
1453 s->state=SSL3_ST_CW_KEY_EXCH_B;
1454 /* number of bytes to write */
1455 s->init_num=n+4;
1456 s->init_off=0;
1457 }
1458
1459 /* SSL3_ST_CW_KEY_EXCH_B */
1460 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1461err:
1462 return(-1);
1463 }
1464
1465static int ssl3_send_client_verify(s)
1466SSL *s;
1467 {
1468 unsigned char *p,*d;
1469 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1470 EVP_PKEY *pkey;
58964a49 1471 int i=0;
d02b48c6 1472 unsigned long n;
58964a49
RE		 1473#ifndef NO_DSA
1474 int j;
1475#endif
d02b48c6
RE		 1476
1477 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1478 {
1479 d=(unsigned char *)s->init_buf->data;
1480 p= &(d[4]);
1481 pkey=s->cert->key->privatekey;
1482
58964a49
RE		 1483 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
1484 &(data[MD5_DIGEST_LENGTH]));
d02b48c6
RE		 1485
1486#ifndef NO_RSA
1487 if (pkey->type == EVP_PKEY_RSA)
1488 {
58964a49
RE		 1489 s->method->ssl3_enc->cert_verify_mac(s,
1490 &(s->s3->finish_dgst1),&(data[0]));
d02b48c6
RE		 1491 i=RSA_private_encrypt(
1492 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1493 data,&(p[2]),pkey->pkey.rsa,
1494 RSA_PKCS1_PADDING);
1495 if (i <= 0)
1496 {
1497 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1498 goto err;
1499 }
1500 s2n(i,p);
1501 n=i+2;
1502 }
1503 else
1504#endif
1505#ifndef NO_DSA
1506 if (pkey->type == EVP_PKEY_DSA)
1507 {
1508 if (!DSA_sign(pkey->save_type,
1509 &(data[MD5_DIGEST_LENGTH]),
1510 SHA_DIGEST_LENGTH,&(p[2]),
1511 (unsigned int *)&j,pkey->pkey.dsa))
1512 {
1513 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1514 goto err;
1515 }
1516 s2n(j,p);
1517 n=j+2;
1518 }
1519 else
1520#endif
1521 {
1522 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,SSL_R_INTERNAL_ERROR);
1523 goto err;
1524 }
1525 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
1526 l2n3(n,d);
1527
1528 s->init_num=(int)n+4;
1529 s->init_off=0;
1530 }
1531 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1532err:
1533 return(-1);
1534 }
1535
1536static int ssl3_send_client_certificate(s)
1537SSL *s;
1538 {
1539 X509 *x509=NULL;
1540 EVP_PKEY *pkey=NULL;
1541 int i;
1542 unsigned long l;
1543
1544 if (s->state == SSL3_ST_CW_CERT_A)
1545 {
1546 if ((s->cert == NULL) ||
1547 (s->cert->key->x509 == NULL) ||
1548 (s->cert->key->privatekey == NULL))
1549 s->state=SSL3_ST_CW_CERT_B;
1550 else
1551 s->state=SSL3_ST_CW_CERT_C;
1552 }
1553
1554 /* We need to get a client cert */
1555 if (s->state == SSL3_ST_CW_CERT_B)
1556 {
1557 /* If we get an error, we need to
1558 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1559 * We then get retied later */
1560 i=0;
1561 if (s->ctx->client_cert_cb != NULL)
1562 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
1563 if (i < 0)
1564 {
1565 s->rwstate=SSL_X509_LOOKUP;
1566 return(-1);
1567 }
1568 s->rwstate=SSL_NOTHING;
1569 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1570 {
1571 s->state=SSL3_ST_CW_CERT_B;
1572 if ( !SSL_use_certificate(s,x509) ||
1573 !SSL_use_PrivateKey(s,pkey))
1574 i=0;
1575 }
1576 else if (i == 1)
1577 {
1578 i=0;
1579 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1580 }
1581
1582 if (x509 != NULL) X509_free(x509);
1583 if (pkey != NULL) EVP_PKEY_free(pkey);
1584 if (i == 0)
1585 {
58964a49
RE		 1586 if (s->version == SSL3_VERSION)
1587 {
1588 s->s3->tmp.cert_req=0;
1589 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1590 return(1);
1591 }
1592 else
1593 {
1594 s->s3->tmp.cert_req=2;
1595 }
d02b48c6
RE		 1596 }
1597
1598 /* Ok, we have a cert */
1599 s->state=SSL3_ST_CW_CERT_C;
1600 }
1601
1602 if (s->state == SSL3_ST_CW_CERT_C)
1603 {
1604 s->state=SSL3_ST_CW_CERT_D;
58964a49
RE		 1605 l=ssl3_output_cert_chain(s,
1606 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
d02b48c6
RE		 1607 s->init_num=(int)l;
1608 s->init_off=0;
1609 }
1610 /* SSL3_ST_CW_CERT_D */
1611 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1612 }
1613
1614#define has_bits(i,m) (((i)&(m)) == (m))
1615
1616static int ssl3_check_cert_and_algorithm(s)
1617SSL *s;
1618 {
1619 int i,idx;
1620 long algs;
1621 EVP_PKEY *pkey=NULL;
1622 CERT *c;
1623 RSA *rsa;
1624 DH *dh;
1625
1626 c=s->session->cert;
1627
1628 if (c == NULL)
1629 {
1630 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_INTERNAL_ERROR);
1631 goto err;
1632 }
1633
1634 algs=s->s3->tmp.new_cipher->algorithms;
1635
1636 /* we don't have a certificate */
1637 if (algs & (SSL_aDH|SSL_aNULL))
1638 return(1);
1639
1640 rsa=s->session->cert->rsa_tmp;
1641 dh=s->session->cert->dh_tmp;
1642
1643 /* This is the passed certificate */
1644
1645 idx=c->cert_type;
1646 pkey=X509_get_pubkey(c->pkeys[idx].x509);
1647 i=X509_certificate_type(c->pkeys[idx].x509,pkey);
a8236c8c 1648 EVP_PKEY_free(pkey);
d02b48c6
RE		 1649
1650
1651 /* Check that we have a certificate if we require one */
1652 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
1653 {
1654 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
1655 goto f_err;
1656 }
1657#ifndef NO_DSA
1658 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
1659 {
1660 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
1661 goto f_err;
1662 }
1663#endif
1664
1665 if ((algs & SSL_kRSA) &&
1666 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
1667 {
1668 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
1669 goto f_err;
1670 }
1671#ifndef NO_DH
1672 else if ((algs & SSL_kEDH) &&
1673 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
1674 {
1675 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
1676 goto f_err;
1677 }
1678 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
1679 {
1680 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
1681 goto f_err;
1682 }
1683#ifndef NO_DSA
1684 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
1685 {
1686 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
1687 goto f_err;
1688 }
1689#endif
1690#endif
1691
06ab81f9 1692 if (SSL_IS_EXPORT(algs) && !has_bits(i,EVP_PKT_EXP))
d02b48c6
RE		 1693 {
1694#ifndef NO_RSA
1695 if (algs & SSL_kRSA)
1696 {
06ab81f9
BL		 1697 if (rsa == NULL
1698 || RSA_size(rsa) > SSL_EXPORT_PKEYLENGTH(algs))
d02b48c6
RE		 1699 {
1700 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
1701 goto f_err;
1702 }
1703 }
1704 else
1705#endif
1706#ifndef NO_DH
1707 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
06ab81f9
BL		 1708 {
1709 if (dh == NULL
1710 || DH_size(dh) > SSL_EXPORT_PKEYLENGTH(algs))
d02b48c6
RE		 1711 {
1712 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
1713 goto f_err;
1714 }
1715 }
1716 else
1717#endif
1718 {
1719 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1720 goto f_err;
1721 }
1722 }
1723 return(1);
1724f_err:
58964a49 1725 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
d02b48c6
RE		 1726err:
1727 return(0);
1728 }
1729
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