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Change functions to ANSI C.
[thirdparty/openssl.git] / ssl / s3_clnt.c
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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
6b691a5c 104static SSL_METHOD *ssl3_get_client_method(int ver)
d02b48c6 105 {
58964a49 106 if (ver == SSL3_VERSION)
d02b48c6
RE		 107 return(SSLv3_client_method());
108 else
109 return(NULL);
110 }
111
6b691a5c 112SSL_METHOD *SSLv3_client_method(void)
d02b48c6
RE		 113 {
114 static int init=1;
115 static SSL_METHOD SSLv3_client_data;
116
117 if (init)
118 {
119 init=0;
120 memcpy((char *)&SSLv3_client_data,(char *)sslv3_base_method(),
121 sizeof(SSL_METHOD));
122 SSLv3_client_data.ssl_connect=ssl3_connect;
123 SSLv3_client_data.get_ssl_method=ssl3_get_client_method;
124 }
125 return(&SSLv3_client_data);
126 }
127
6b691a5c 128int ssl3_connect(SSL *s)
d02b48c6
RE		 129 {
130 BUF_MEM *buf;
131 unsigned long Time=time(NULL),l;
132 long num1;
133 void (*cb)()=NULL;
134 int ret= -1;
d02b48c6
RE		 135 int new_state,state,skip=0;;
136
bf5dcd13 137 RAND_seed(&Time,sizeof(Time));
d02b48c6 138 ERR_clear_error();
58964a49 139 clear_sys_error();
d02b48c6
RE		 140
141 if (s->info_callback != NULL)
142 cb=s->info_callback;
143 else if (s->ctx->info_callback != NULL)
144 cb=s->ctx->info_callback;
145
146 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
147 s->in_handshake++;
148
149 for (;;)
150 {
151 state=s->state;
152
153 switch(s->state)
154 {
155 case SSL_ST_RENEGOTIATE:
156 s->new_session=1;
157 s->state=SSL_ST_CONNECT;
413c4f45 158 s->ctx->stats.sess_connect_renegotiate++;
d02b48c6
RE		 159 /* break */
160 case SSL_ST_BEFORE:
161 case SSL_ST_CONNECT:
162 case SSL_ST_BEFORE|SSL_ST_CONNECT:
163 case SSL_ST_OK|SSL_ST_CONNECT:
164
413c4f45 165 s->server=0;
d02b48c6
RE		 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;
413c4f45 198 s->ctx->stats.sess_connect++;
d02b48c6
RE		 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;
413c4f45
MC		 327 if (s->s3->tmp.new_compression == NULL)
328 s->session->compress_meth=0;
329 else
330 s->session->compress_meth=
331 s->s3->tmp.new_compression->id;
58964a49 332 if (!s->method->ssl3_enc->setup_key_block(s))
d02b48c6
RE		 333 {
334 ret= -1;
335 goto end;
336 }
337
58964a49 338 if (!s->method->ssl3_enc->change_cipher_state(s,
d02b48c6
RE		 339 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
340 {
341 ret= -1;
342 goto end;
343 }
344
345 break;
346
347 case SSL3_ST_CW_FINISHED_A:
348 case SSL3_ST_CW_FINISHED_B:
349 ret=ssl3_send_finished(s,
350 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
58964a49
RE		 351 s->method->ssl3_enc->client_finished,
352 s->method->ssl3_enc->client_finished_len);
d02b48c6
RE		 353 if (ret <= 0) goto end;
354 s->state=SSL3_ST_CW_FLUSH;
355
356 /* clear flags */
357 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
358 if (s->hit)
359 {
360 s->s3->tmp.next_state=SSL_ST_OK;
361 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
362 {
363 s->state=SSL_ST_OK;
364 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
365 s->s3->delay_buf_pop_ret=0;
366 }
367 }
368 else
369 {
370 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
371 }
372 s->init_num=0;
373 break;
374
375 case SSL3_ST_CR_FINISHED_A:
376 case SSL3_ST_CR_FINISHED_B:
377
378 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
58964a49 379 SSL3_ST_CR_FINISHED_B);
d02b48c6
RE		 380 if (ret <= 0) goto end;
381
382 if (s->hit)
383 s->state=SSL3_ST_CW_CHANGE_A;
384 else
385 s->state=SSL_ST_OK;
386 s->init_num=0;
387 break;
388
389 case SSL3_ST_CW_FLUSH:
390 /* number of bytes to be flushed */
391 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
392 if (num1 > 0)
393 {
394 s->rwstate=SSL_WRITING;
395 num1=BIO_flush(s->wbio);
396 if (num1 <= 0) { ret= -1; goto end; }
397 s->rwstate=SSL_NOTHING;
398 }
399
400 s->state=s->s3->tmp.next_state;
401 break;
402
403 case SSL_ST_OK:
404 /* clean a few things up */
405 ssl3_cleanup_key_block(s);
406
413c4f45 407 if (s->init_buf != NULL)
d02b48c6 408 {
413c4f45
MC		 409 BUF_MEM_free(s->init_buf);
410 s->init_buf=NULL;
d02b48c6 411 }
413c4f45
MC		 412
413 /* If we are not 'joining' the last two packets,
414 * remove the buffering now */
415 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
416 ssl_free_wbio_buffer(s);
417 /* else do it later in ssl3_write */
d02b48c6
RE		 418
419 s->init_num=0;
420 s->new_session=0;
421
422 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
413c4f45 423 if (s->hit) s->ctx->stats.sess_hit++;
d02b48c6
RE		 424
425 ret=1;
426 /* s->server=0; */
427 s->handshake_func=ssl3_connect;
413c4f45 428 s->ctx->stats.sess_connect_good++;
d02b48c6
RE		 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
6b691a5c 469static int ssl3_client_hello(SSL *s)
d02b48c6
RE		 470 {
471 unsigned char *buf;
472 unsigned char *p,*d;
413c4f45 473 int i,j;
d02b48c6 474 unsigned long Time,l;
413c4f45 475 SSL_COMP *comp;
d02b48c6
RE		 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;
413c4f45 499 s->client_version=s->version;
d02b48c6
RE		 500
501 /* Random stuff */
502 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
503 p+=SSL3_RANDOM_SIZE;
504
505 /* Session ID */
506 if (s->new_session)
507 i=0;
508 else
509 i=s->session->session_id_length;
510 *(p++)=i;
511 if (i != 0)
512 {
513 memcpy(p,s->session->session_id,i);
514 p+=i;
515 }
516
517 /* Ciphers supported */
518 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]));
519 if (i == 0)
520 {
521 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
522 goto err;
523 }
524 s2n(i,p);
525 p+=i;
526
dfeab068 527 /* COMPRESSION */
413c4f45
MC		 528 if (s->ctx->comp_methods == NULL)
529 j=0;
530 else
f73e07cf 531 j=sk_SSL_COMP_num(s->ctx->comp_methods);
413c4f45
MC		 532 *(p++)=1+j;
533 for (i=0; i<j; i++)
534 {
f73e07cf 535 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
413c4f45
MC		 536 *(p++)=comp->id;
537 }
538 *(p++)=0; /* Add the NULL method */
d02b48c6
RE		 539
540 l=(p-d);
541 d=buf;
542 *(d++)=SSL3_MT_CLIENT_HELLO;
543 l2n3(l,d);
544
545 s->state=SSL3_ST_CW_CLNT_HELLO_B;
546 /* number of bytes to write */
547 s->init_num=p-buf;
548 s->init_off=0;
549 }
550
551 /* SSL3_ST_CW_CLNT_HELLO_B */
552 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
553err:
554 return(-1);
555 }
556
6b691a5c 557static int ssl3_get_server_hello(SSL *s)
d02b48c6 558 {
f73e07cf 559 STACK_OF(SSL_CIPHER) *sk;
d02b48c6
RE		 560 SSL_CIPHER *c;
561 unsigned char *p,*d;
562 int i,al,ok;
563 unsigned int j;
564 long n;
413c4f45 565 SSL_COMP *comp;
d02b48c6
RE		 566
567 n=ssl3_get_message(s,
568 SSL3_ST_CR_SRVR_HELLO_A,
569 SSL3_ST_CR_SRVR_HELLO_B,
570 SSL3_MT_SERVER_HELLO,
571 300, /* ?? */
572 &ok);
573
574 if (!ok) return((int)n);
575 d=p=(unsigned char *)s->init_buf->data;
576
58964a49 577 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
d02b48c6
RE		 578 {
579 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
58964a49
RE		 580 s->version=(s->version&0xff00)|p[1];
581 al=SSL_AD_PROTOCOL_VERSION;
582 goto f_err;
d02b48c6
RE		 583 }
584 p+=2;
585
586 /* load the server hello data */
587 /* load the server random */
588 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
589 p+=SSL3_RANDOM_SIZE;
590
591 /* get the session-id */
592 j= *(p++);
593
594 if ((j != 0) && (j != SSL3_SESSION_ID_SIZE))
595 {
596 /* SSLref returns 16 :-( */
597 if (j < SSL2_SSL_SESSION_ID_LENGTH)
598 {
58964a49 599 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 600 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_SHORT);
601 goto f_err;
602 }
603 }
b4cadc6e
BL		 604 if (j != 0 && j == s->session->session_id_length
605 && memcmp(p,s->session->session_id,j) == 0)
606 {
607 if(s->sid_ctx_length != s->session->sid_ctx_length
608 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
609 {
610 al=SSL_AD_ILLEGAL_PARAMETER;
611 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
612 goto f_err;
613 }
614 s->hit=1;
615 }
58964a49 616 else /* a miss or crap from the other end */
d02b48c6 617 {
58964a49
RE		 618 /* If we were trying for session-id reuse, make a new
619 * SSL_SESSION so we don't stuff up other people */
d02b48c6 620 s->hit=0;
58964a49
RE		 621 if (s->session->session_id_length > 0)
622 {
623 if (!ssl_get_new_session(s,0))
624 {
625 al=SSL_AD_INTERNAL_ERROR;
626 goto f_err;
627 }
628 }
629 s->session->session_id_length=j;
630 memcpy(s->session->session_id,p,j); /* j could be 0 */
d02b48c6
RE		 631 }
632 p+=j;
633 c=ssl_get_cipher_by_char(s,p);
634 if (c == NULL)
635 {
636 /* unknown cipher */
58964a49 637 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 638 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
639 goto f_err;
640 }
641 p+=ssl_put_cipher_by_char(s,NULL,NULL);
642
643 sk=ssl_get_ciphers_by_id(s);
f73e07cf 644 i=sk_SSL_CIPHER_find(sk,c);
d02b48c6
RE		 645 if (i < 0)
646 {
647 /* we did not say we would use this cipher */
58964a49 648 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 649 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
650 goto f_err;
651 }
652
653 if (s->hit && (s->session->cipher != c))
654 {
58964a49 655 if (!(s->options &
d02b48c6
RE		 656 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
657 {
58964a49 658 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 659 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
660 goto f_err;
661 }
662 }
663 s->s3->tmp.new_cipher=c;
664
665 /* lets get the compression algorithm */
dfeab068 666 /* COMPRESSION */
d02b48c6 667 j= *(p++);
413c4f45
MC		 668 if (j == 0)
669 comp=NULL;
670 else
671 comp=ssl3_comp_find(s->ctx->comp_methods,j);
672
673 if ((j != 0) && (comp == NULL))
d02b48c6 674 {
58964a49 675 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 676 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
677 goto f_err;
678 }
413c4f45
MC		 679 else
680 {
681 s->s3->tmp.new_compression=comp;
682 }
d02b48c6
RE		 683
684 if (p != (d+n))
685 {
686 /* wrong packet length */
58964a49 687 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 688 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
689 goto err;
690 }
691
692 return(1);
693f_err:
694 ssl3_send_alert(s,SSL3_AL_FATAL,al);
695err:
696 return(-1);
697 }
698
6b691a5c 699static int ssl3_get_server_certificate(SSL *s)
d02b48c6
RE		 700 {
701 int al,i,ok,ret= -1;
702 unsigned long n,nc,llen,l;
703 X509 *x=NULL;
704 unsigned char *p,*d,*q;
f73e07cf 705 STACK_OF(X509) *sk=NULL;
d02b48c6
RE		 706 CERT *c;
707 EVP_PKEY *pkey=NULL;
708
709 n=ssl3_get_message(s,
710 SSL3_ST_CR_CERT_A,
711 SSL3_ST_CR_CERT_B,
712 -1,
713#if defined(MSDOS) && !defined(WIN32)
714 1024*30, /* 30k max cert list :-) */
715#else
716 1024*100, /* 100k max cert list :-) */
717#endif
718 &ok);
719
720 if (!ok) return((int)n);
721
722 if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE)
723 {
724 s->s3->tmp.reuse_message=1;
725 return(1);
726 }
727
728 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
729 {
58964a49 730 al=SSL_AD_UNEXPECTED_MESSAGE;
d02b48c6
RE		 731 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
732 goto f_err;
733 }
734 d=p=(unsigned char *)s->init_buf->data;
735
f73e07cf 736 if ((sk=sk_X509_new_null()) == NULL)
d02b48c6
RE		 737 {
738 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
739 goto err;
740 }
741
742 n2l3(p,llen);
743 if (llen+3 != n)
744 {
58964a49 745 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 746 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
747 goto f_err;
748 }
749 for (nc=0; nc<llen; )
750 {
751 n2l3(p,l);
752 if ((l+nc+3) > llen)
753 {
58964a49 754 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 755 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
756 goto f_err;
757 }
758
759 q=p;
760 x=d2i_X509(NULL,&q,l);
761 if (x == NULL)
762 {
58964a49 763 al=SSL_AD_BAD_CERTIFICATE;
d02b48c6
RE		 764 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
765 goto f_err;
766 }
767 if (q != (p+l))
768 {
58964a49 769 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 770 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
771 goto f_err;
772 }
f73e07cf 773 if (!sk_X509_push(sk,x))
d02b48c6
RE		 774 {
775 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
776 goto err;
777 }
778 x=NULL;
779 nc+=l+3;
780 p=q;
781 }
782
783 i=ssl_verify_cert_chain(s,sk);
784 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i))
785 {
786 al=ssl_verify_alarm_type(s->verify_result);
787 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
788 goto f_err;
789 }
790
791 c=ssl_cert_new();
792 if (c == NULL) goto err;
793
794 if (s->session->cert) ssl_cert_free(s->session->cert);
795 s->session->cert=c;
796
797 c->cert_chain=sk;
f73e07cf 798 x=sk_X509_value(sk,0);
d02b48c6
RE		 799 sk=NULL;
800
801 pkey=X509_get_pubkey(x);
802
dfeab068 803 if ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))
d02b48c6
RE		 804 {
805 x=NULL;
806 al=SSL3_AL_FATAL;
807 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
808 goto f_err;
809 }
810
811 i=ssl_cert_type(x,pkey);
812 if (i < 0)
813 {
814 x=NULL;
815 al=SSL3_AL_FATAL;
816 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNKNOWN_CERTIFICATE_TYPE);
817 goto f_err;
818 }
819
820 c->cert_type=i;
58964a49 821 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
d02b48c6
RE		 822 if (c->pkeys[i].x509 != NULL)
823 X509_free(c->pkeys[i].x509);
824 c->pkeys[i].x509=x;
825 c->key= &(c->pkeys[i]);
826
827 if ((s->session != NULL) && (s->session->peer != NULL))
828 X509_free(s->session->peer);
58964a49 829 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
d02b48c6
RE		 830 s->session->peer=x;
831
832 x=NULL;
833 ret=1;
834
835 if (0)
836 {
837f_err:
838 ssl3_send_alert(s,SSL3_AL_FATAL,al);
839 }
840err:
a8236c8c
DSH		 841 EVP_PKEY_free(pkey);
842 X509_free(x);
f73e07cf 843 sk_X509_pop_free(sk,X509_free);
d02b48c6
RE		 844 return(ret);
845 }
846
6b691a5c 847static int ssl3_get_key_exchange(SSL *s)
d02b48c6
RE		 848 {
849#ifndef NO_RSA
850 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
851#endif
852 EVP_MD_CTX md_ctx;
853 unsigned char *param,*p;
854 int al,i,j,param_len,ok;
855 long n,alg;
856 EVP_PKEY *pkey=NULL;
857 RSA *rsa=NULL;
58964a49 858#ifndef NO_DH
d02b48c6 859 DH *dh=NULL;
58964a49 860#endif
d02b48c6
RE		 861
862 n=ssl3_get_message(s,
863 SSL3_ST_CR_KEY_EXCH_A,
864 SSL3_ST_CR_KEY_EXCH_B,
865 -1,
866 1024*8, /* ?? */
867 &ok);
868
869 if (!ok) return((int)n);
870
871 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
872 {
873 s->s3->tmp.reuse_message=1;
874 return(1);
875 }
876
877 param=p=(unsigned char *)s->init_buf->data;
878
879 if (s->session->cert != NULL)
880 {
881#ifndef NO_RSA
882 if (s->session->cert->rsa_tmp != NULL)
883 {
884 RSA_free(s->session->cert->rsa_tmp);
885 s->session->cert->rsa_tmp=NULL;
886 }
887#endif
888#ifndef NO_DH
889 if (s->session->cert->dh_tmp)
890 {
891 DH_free(s->session->cert->dh_tmp);
892 s->session->cert->dh_tmp=NULL;
893 }
894#endif
895 }
896 else
897 {
898 s->session->cert=ssl_cert_new();
899 }
900
901 param_len=0;
902 alg=s->s3->tmp.new_cipher->algorithms;
903
904#ifndef NO_RSA
905 if (alg & SSL_kRSA)
906 {
907 if ((rsa=RSA_new()) == NULL)
908 {
909 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
910 goto err;
911 }
912 n2s(p,i);
913 param_len=i+2;
914 if (param_len > n)
915 {
58964a49 916 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 917 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
918 goto f_err;
919 }
920 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
921 {
922 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
923 goto err;
924 }
925 p+=i;
926
927 n2s(p,i);
928 param_len+=i+2;
929 if (param_len > n)
930 {
58964a49 931 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 932 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
933 goto f_err;
934 }
935 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
936 {
937 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
938 goto err;
939 }
940 p+=i;
941 n-=param_len;
942
943/* s->session->cert->rsa_tmp=rsa;*/
944 /* this should be because we are using an export cipher */
945 if (alg & SSL_aRSA)
946 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_RSA_ENC].x509);
947 else
948 {
949 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
950 goto err;
951 }
952 s->session->cert->rsa_tmp=rsa;
953 }
954 else
955#endif
956#ifndef NO_DH
957 if (alg & SSL_kEDH)
958 {
959 if ((dh=DH_new()) == NULL)
960 {
961 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
962 goto err;
963 }
964 n2s(p,i);
965 param_len=i+2;
966 if (param_len > n)
967 {
58964a49 968 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 969 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
970 goto f_err;
971 }
972 if (!(dh->p=BN_bin2bn(p,i,NULL)))
973 {
974 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
975 goto err;
976 }
977 p+=i;
978
979 n2s(p,i);
980 param_len+=i+2;
981 if (param_len > n)
982 {
58964a49 983 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 984 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
985 goto f_err;
986 }
987 if (!(dh->g=BN_bin2bn(p,i,NULL)))
988 {
989 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
990 goto err;
991 }
992 p+=i;
993
994 n2s(p,i);
995 param_len+=i+2;
996 if (param_len > n)
997 {
58964a49 998 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 999 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1000 goto f_err;
1001 }
1002 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1003 {
1004 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1005 goto err;
1006 }
1007 p+=i;
1008 n-=param_len;
1009
1010#ifndef NO_RSA
1011 if (alg & SSL_aRSA)
1012 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_RSA_ENC].x509);
1013 else
1014#endif
1015#ifndef NO_DSA
1016 if (alg & SSL_aDSS)
1017 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_DSA_SIGN].x509);
1018#endif
1019 /* else anonymous DH, so no certificate or pkey. */
1020
1021 s->session->cert->dh_tmp=dh;
413c4f45 1022 dh=NULL;
d02b48c6
RE		 1023 }
1024 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
1025 {
58964a49 1026 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 1027 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1028 goto f_err;
1029 }
1030#endif
dfeab068
RE		 1031 if (alg & SSL_aFZA)
1032 {
1033 al=SSL_AD_HANDSHAKE_FAILURE;
1034 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1035 goto f_err;
1036 }
1037
d02b48c6
RE		 1038
1039 /* p points to the next byte, there are 'n' bytes left */
1040
1041
1042 /* if it was signed, check the signature */
1043 if (pkey != NULL)
1044 {
1045 n2s(p,i);
1046 n-=2;
1047 j=EVP_PKEY_size(pkey);
1048
1049 if ((i != n) || (n > j) || (n <= 0))
1050 {
1051 /* wrong packet length */
58964a49 1052 al=SSL_AD_DECODE_ERROR;
d02b48c6 1053 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
dfeab068 1054 goto f_err;
d02b48c6
RE		 1055 }
1056
1057#ifndef NO_RSA
1058 if (pkey->type == EVP_PKEY_RSA)
1059 {
1060 int num;
1061
1062 j=0;
1063 q=md_buf;
1064 for (num=2; num > 0; num--)
1065 {
58964a49
RE		 1066 EVP_DigestInit(&md_ctx,(num == 2)
1067 ?s->ctx->md5:s->ctx->sha1);
d02b48c6
RE		 1068 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1069 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1070 EVP_DigestUpdate(&md_ctx,param,param_len);
1071 EVP_DigestFinal(&md_ctx,q,(unsigned int *)&i);
1072 q+=i;
1073 j+=i;
1074 }
1075 i=RSA_public_decrypt((int)n,p,p,pkey->pkey.rsa,
1076 RSA_PKCS1_PADDING);
1077 if (i <= 0)
1078 {
58964a49 1079 al=SSL_AD_DECRYPT_ERROR;
d02b48c6
RE		 1080 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1081 goto f_err;
1082 }
1083 if ((j != i) || (memcmp(p,md_buf,i) != 0))
1084 {
1085 /* bad signature */
58964a49 1086 al=SSL_AD_DECRYPT_ERROR;
d02b48c6
RE		 1087 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1088 goto f_err;
1089 }
1090 }
1091 else
1092#endif
1093#ifndef NO_DSA
1094 if (pkey->type == EVP_PKEY_DSA)
1095 {
1096 /* lets do DSS */
1097 EVP_VerifyInit(&md_ctx,EVP_dss1());
1098 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1099 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1100 EVP_VerifyUpdate(&md_ctx,param,param_len);
1101 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1102 {
1103 /* bad signature */
58964a49 1104 al=SSL_AD_DECRYPT_ERROR;
d02b48c6
RE		 1105 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1106 goto f_err;
1107 }
1108 }
1109 else
1110#endif
1111 {
1112 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1113 goto err;
1114 }
1115 }
1116 else
1117 {
1118 /* still data left over */
1119 if (!(alg & SSL_aNULL))
1120 {
1121 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1122 goto err;
1123 }
1124 if (n != 0)
1125 {
58964a49 1126 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 1127 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1128 goto f_err;
1129 }
1130 }
a8236c8c 1131 EVP_PKEY_free(pkey);
d02b48c6
RE		 1132 return(1);
1133f_err:
1134 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1135err:
a8236c8c 1136 EVP_PKEY_free(pkey);
d02b48c6
RE		 1137 return(-1);
1138 }
1139
6b691a5c 1140static int ssl3_get_certificate_request(SSL *s)
d02b48c6
RE		 1141 {
1142 int ok,ret=0;
58964a49
RE		 1143 unsigned long n,nc,l;
1144 unsigned int llen,ctype_num,i;
d02b48c6
RE		 1145 X509_NAME *xn=NULL;
1146 unsigned char *p,*d,*q;
f73e07cf 1147 STACK_OF(X509_NAME) *ca_sk=NULL;
d02b48c6
RE		 1148
1149 n=ssl3_get_message(s,
1150 SSL3_ST_CR_CERT_REQ_A,
1151 SSL3_ST_CR_CERT_REQ_B,
1152 -1,
1153#if defined(MSDOS) && !defined(WIN32)
1154 1024*30, /* 30k max cert list :-) */
1155#else
1156 1024*100, /* 100k max cert list :-) */
1157#endif
1158 &ok);
1159
1160 if (!ok) return((int)n);
1161
1162 s->s3->tmp.cert_req=0;
1163
1164 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1165 {
1166 s->s3->tmp.reuse_message=1;
1167 return(1);
1168 }
1169
1170 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1171 {
58964a49 1172 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
d02b48c6
RE		 1173 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1174 goto err;
1175 }
1176
58964a49
RE		 1177 /* TLS does not like anon-DH with client cert */
1178 if (s->version > SSL3_VERSION)
1179 {
1180 l=s->s3->tmp.new_cipher->algorithms;
1181 if (l & SSL_aNULL)
1182 {
1183 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1184 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1185 goto err;
1186 }
1187 }
1188
d02b48c6
RE		 1189 d=p=(unsigned char *)s->init_buf->data;
1190
f73e07cf 1191 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
d02b48c6
RE		 1192 {
1193 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1194 goto err;
1195 }
1196
1197 /* get the certificate types */
1198 ctype_num= *(p++);
1199 if (ctype_num > SSL3_CT_NUMBER)
1200 ctype_num=SSL3_CT_NUMBER;
1201 for (i=0; i<ctype_num; i++)
1202 s->s3->tmp.ctype[i]= p[i];
1203 p+=ctype_num;
1204
1205 /* get the CA RDNs */
1206 n2s(p,llen);
dfeab068
RE		 1207#if 0
1208{
1209FILE *out;
1210out=fopen("/tmp/vsign.der","w");
1211fwrite(p,1,llen,out);
1212fclose(out);
1213}
1214#endif
1215
d02b48c6
RE		 1216 if ((llen+ctype_num+2+1) != n)
1217 {
58964a49 1218 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
d02b48c6
RE		 1219 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1220 goto err;
1221 }
1222
1223 for (nc=0; nc<llen; )
1224 {
1225 n2s(p,l);
1226 if ((l+nc+2) > llen)
1227 {
58964a49 1228 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
d02b48c6 1229 goto cont; /* netscape bugs */
58964a49 1230 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
d02b48c6
RE		 1231 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1232 goto err;
1233 }
1234
1235 q=p;
1236
1237 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1238 {
1239 /* If netscape tollerance is on, ignore errors */
58964a49 1240 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
d02b48c6
RE		 1241 goto cont;
1242 else
1243 {
58964a49 1244 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
d02b48c6
RE		 1245 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1246 goto err;
1247 }
1248 }
1249
1250 if (q != (p+l))
1251 {
58964a49 1252 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
d02b48c6
RE		 1253 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1254 goto err;
1255 }
f73e07cf 1256 if (!sk_X509_NAME_push(ca_sk,xn))
d02b48c6
RE		 1257 {
1258 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1259 goto err;
1260 }
1261
1262 p+=l;
1263 nc+=l+2;
1264 }
1265
1266 if (0)
1267 {
1268cont:
1269 ERR_clear_error();
1270 }
1271
1272 /* we should setup a certficate to return.... */
1273 s->s3->tmp.cert_req=1;
1274 s->s3->tmp.ctype_num=ctype_num;
1275 if (s->s3->tmp.ca_names != NULL)
f73e07cf 1276 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
d02b48c6
RE		 1277 s->s3->tmp.ca_names=ca_sk;
1278 ca_sk=NULL;
1279
1280 ret=1;
1281err:
f73e07cf 1282 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
d02b48c6
RE		 1283 return(ret);
1284 }
1285
6b691a5c 1286static int ca_dn_cmp(X509_NAME **a, X509_NAME **b)
d02b48c6
RE		 1287 {
1288 return(X509_NAME_cmp(*a,*b));
1289 }
1290
6b691a5c 1291static int ssl3_get_server_done(SSL *s)
d02b48c6
RE		 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
6b691a5c 1314static int ssl3_send_client_key_exchange(SSL *s)
d02b48c6 1315 {
58964a49 1316 unsigned char *p,*q,*d;
d02b48c6
RE		 1317 int n;
1318 unsigned long l;
1319 EVP_PKEY *pkey=NULL;
1320
1321 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1322 {
1323 d=(unsigned char *)s->init_buf->data;
1324 p= &(d[4]);
1325
1326 l=s->s3->tmp.new_cipher->algorithms;
1327
1328#ifndef NO_RSA
1329 if (l & SSL_kRSA)
1330 {
1331 RSA *rsa;
dfeab068 1332 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
d02b48c6
RE		 1333
1334 if (s->session->cert->rsa_tmp != NULL)
1335 rsa=s->session->cert->rsa_tmp;
1336 else
1337 {
1338 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_RSA_ENC].x509);
1339 if ((pkey == NULL) ||
1340 (pkey->type != EVP_PKEY_RSA) ||
1341 (pkey->pkey.rsa == NULL))
1342 {
1343 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1344 goto err;
1345 }
1346 rsa=pkey->pkey.rsa;
1347 }
1348
413c4f45
MC		 1349 tmp_buf[0]=s->client_version>>8;
1350 tmp_buf[1]=s->client_version&0xff;
d02b48c6
RE		 1351 RAND_bytes(&(tmp_buf[2]),SSL_MAX_MASTER_KEY_LENGTH-2);
1352
1353 s->session->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
1354
58964a49
RE		 1355 q=p;
1356 /* Fix buf for TLS and beyond */
1357 if (s->version > SSL3_VERSION)
1358 p+=2;
1359 n=RSA_public_encrypt(SSL_MAX_MASTER_KEY_LENGTH,
1360 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
dfeab068
RE		 1361#ifdef PKCS1_CHECK
1362 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
1363 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
1364#endif
d02b48c6
RE		 1365 if (n <= 0)
1366 {
1367 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1368 goto err;
1369 }
1370
58964a49
RE		 1371 /* Fix buf for TLS and beyond */
1372 if (s->version > SSL3_VERSION)
1373 {
1374 s2n(n,q);
1375 n+=2;
1376 }
1377
d02b48c6 1378 s->session->master_key_length=
58964a49 1379 s->method->ssl3_enc->generate_master_secret(s,
d02b48c6 1380 s->session->master_key,
dfeab068
RE		 1381 tmp_buf,SSL_MAX_MASTER_KEY_LENGTH);
1382 memset(tmp_buf,0,SSL_MAX_MASTER_KEY_LENGTH);
d02b48c6
RE		 1383 }
1384 else
1385#endif
1386#ifndef NO_DH
1387 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1388 {
1389 DH *dh_srvr,*dh_clnt;
1390
1391 if (s->session->cert->dh_tmp != NULL)
1392 dh_srvr=s->session->cert->dh_tmp;
1393 else
1394 {
1395 /* we get them from the cert */
58964a49 1396 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
d02b48c6
RE		 1397 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1398 goto err;
1399 }
1400
1401 /* generate a new random key */
1402 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1403 {
1404 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1405 goto err;
1406 }
1407 if (!DH_generate_key(dh_clnt))
1408 {
1409 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1410 goto err;
1411 }
1412
1413 /* use the 'p' output buffer for the DH key, but
1414 * make sure to clear it out afterwards */
58964a49 1415
d02b48c6 1416 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
58964a49 1417
d02b48c6
RE		 1418 if (n <= 0)
1419 {
1420 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1421 goto err;
1422 }
1423
1424 /* generate master key from the result */
1425 s->session->master_key_length=
58964a49 1426 s->method->ssl3_enc->generate_master_secret(s,
d02b48c6
RE		 1427 s->session->master_key,p,n);
1428 /* clean up */
1429 memset(p,0,n);
1430
1431 /* send off the data */
1432 n=BN_num_bytes(dh_clnt->pub_key);
1433 s2n(n,p);
1434 BN_bn2bin(dh_clnt->pub_key,p);
1435 n+=2;
1436
1437 DH_free(dh_clnt);
1438
1439 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1440 }
1441 else
1442#endif
1443 {
58964a49 1444 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
d02b48c6
RE		 1445 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1446 goto err;
1447 }
1448
1449 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1450 l2n3(n,d);
1451
1452 s->state=SSL3_ST_CW_KEY_EXCH_B;
1453 /* number of bytes to write */
1454 s->init_num=n+4;
1455 s->init_off=0;
1456 }
1457
1458 /* SSL3_ST_CW_KEY_EXCH_B */
1459 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1460err:
1461 return(-1);
1462 }
1463
6b691a5c 1464static int ssl3_send_client_verify(SSL *s)
d02b48c6
RE		 1465 {
1466 unsigned char *p,*d;
1467 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1468 EVP_PKEY *pkey;
58964a49 1469 int i=0;
d02b48c6 1470 unsigned long n;
58964a49
RE		 1471#ifndef NO_DSA
1472 int j;
1473#endif
d02b48c6
RE		 1474
1475 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1476 {
1477 d=(unsigned char *)s->init_buf->data;
1478 p= &(d[4]);
1479 pkey=s->cert->key->privatekey;
1480
58964a49
RE		 1481 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
1482 &(data[MD5_DIGEST_LENGTH]));
d02b48c6
RE		 1483
1484#ifndef NO_RSA
1485 if (pkey->type == EVP_PKEY_RSA)
1486 {
58964a49
RE		 1487 s->method->ssl3_enc->cert_verify_mac(s,
1488 &(s->s3->finish_dgst1),&(data[0]));
d02b48c6
RE		 1489 i=RSA_private_encrypt(
1490 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1491 data,&(p[2]),pkey->pkey.rsa,
1492 RSA_PKCS1_PADDING);
1493 if (i <= 0)
1494 {
1495 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1496 goto err;
1497 }
1498 s2n(i,p);
1499 n=i+2;
1500 }
1501 else
1502#endif
1503#ifndef NO_DSA
1504 if (pkey->type == EVP_PKEY_DSA)
1505 {
1506 if (!DSA_sign(pkey->save_type,
1507 &(data[MD5_DIGEST_LENGTH]),
1508 SHA_DIGEST_LENGTH,&(p[2]),
1509 (unsigned int *)&j,pkey->pkey.dsa))
1510 {
1511 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1512 goto err;
1513 }
1514 s2n(j,p);
1515 n=j+2;
1516 }
1517 else
1518#endif
1519 {
1520 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,SSL_R_INTERNAL_ERROR);
1521 goto err;
1522 }
1523 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
1524 l2n3(n,d);
1525
1526 s->init_num=(int)n+4;
1527 s->init_off=0;
1528 }
1529 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1530err:
1531 return(-1);
1532 }
1533
6b691a5c 1534static int ssl3_send_client_certificate(SSL *s)
d02b48c6
RE		 1535 {
1536 X509 *x509=NULL;
1537 EVP_PKEY *pkey=NULL;
1538 int i;
1539 unsigned long l;
1540
1541 if (s->state == SSL3_ST_CW_CERT_A)
1542 {
1543 if ((s->cert == NULL) ||
1544 (s->cert->key->x509 == NULL) ||
1545 (s->cert->key->privatekey == NULL))
1546 s->state=SSL3_ST_CW_CERT_B;
1547 else
1548 s->state=SSL3_ST_CW_CERT_C;
1549 }
1550
1551 /* We need to get a client cert */
1552 if (s->state == SSL3_ST_CW_CERT_B)
1553 {
1554 /* If we get an error, we need to
1555 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1556 * We then get retied later */
1557 i=0;
1558 if (s->ctx->client_cert_cb != NULL)
1559 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
1560 if (i < 0)
1561 {
1562 s->rwstate=SSL_X509_LOOKUP;
1563 return(-1);
1564 }
1565 s->rwstate=SSL_NOTHING;
1566 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1567 {
1568 s->state=SSL3_ST_CW_CERT_B;
1569 if ( !SSL_use_certificate(s,x509) ||
1570 !SSL_use_PrivateKey(s,pkey))
1571 i=0;
1572 }
1573 else if (i == 1)
1574 {
1575 i=0;
1576 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1577 }
1578
1579 if (x509 != NULL) X509_free(x509);
1580 if (pkey != NULL) EVP_PKEY_free(pkey);
1581 if (i == 0)
1582 {
58964a49
RE		 1583 if (s->version == SSL3_VERSION)
1584 {
1585 s->s3->tmp.cert_req=0;
1586 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1587 return(1);
1588 }
1589 else
1590 {
1591 s->s3->tmp.cert_req=2;
1592 }
d02b48c6
RE		 1593 }
1594
1595 /* Ok, we have a cert */
1596 s->state=SSL3_ST_CW_CERT_C;
1597 }
1598
1599 if (s->state == SSL3_ST_CW_CERT_C)
1600 {
1601 s->state=SSL3_ST_CW_CERT_D;
58964a49
RE		 1602 l=ssl3_output_cert_chain(s,
1603 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
d02b48c6
RE		 1604 s->init_num=(int)l;
1605 s->init_off=0;
1606 }
1607 /* SSL3_ST_CW_CERT_D */
1608 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1609 }
1610
1611#define has_bits(i,m) (((i)&(m)) == (m))
1612
6b691a5c 1613static int ssl3_check_cert_and_algorithm(SSL *s)
d02b48c6
RE		 1614 {
1615 int i,idx;
1616 long algs;
1617 EVP_PKEY *pkey=NULL;
1618 CERT *c;
1619 RSA *rsa;
1620 DH *dh;
1621
1622 c=s->session->cert;
1623
1624 if (c == NULL)
1625 {
1626 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_INTERNAL_ERROR);
1627 goto err;
1628 }
1629
1630 algs=s->s3->tmp.new_cipher->algorithms;
1631
1632 /* we don't have a certificate */
1633 if (algs & (SSL_aDH|SSL_aNULL))
1634 return(1);
1635
1636 rsa=s->session->cert->rsa_tmp;
1637 dh=s->session->cert->dh_tmp;
1638
1639 /* This is the passed certificate */
1640
1641 idx=c->cert_type;
1642 pkey=X509_get_pubkey(c->pkeys[idx].x509);
1643 i=X509_certificate_type(c->pkeys[idx].x509,pkey);
a8236c8c 1644 EVP_PKEY_free(pkey);
d02b48c6
RE		 1645
1646
1647 /* Check that we have a certificate if we require one */
1648 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
1649 {
1650 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
1651 goto f_err;
1652 }
1653#ifndef NO_DSA
1654 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
1655 {
1656 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
1657 goto f_err;
1658 }
1659#endif
1660
1661 if ((algs & SSL_kRSA) &&
1662 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
1663 {
1664 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
1665 goto f_err;
1666 }
1667#ifndef NO_DH
1668 else if ((algs & SSL_kEDH) &&
1669 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
1670 {
1671 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
1672 goto f_err;
1673 }
1674 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
1675 {
1676 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
1677 goto f_err;
1678 }
1679#ifndef NO_DSA
1680 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
1681 {
1682 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
1683 goto f_err;
1684 }
1685#endif
1686#endif
1687
06ab81f9 1688 if (SSL_IS_EXPORT(algs) && !has_bits(i,EVP_PKT_EXP))
d02b48c6
RE		 1689 {
1690#ifndef NO_RSA
1691 if (algs & SSL_kRSA)
1692 {
06ab81f9
BL		 1693 if (rsa == NULL
1694 || RSA_size(rsa) > SSL_EXPORT_PKEYLENGTH(algs))
d02b48c6
RE		 1695 {
1696 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
1697 goto f_err;
1698 }
1699 }
1700 else
1701#endif
1702#ifndef NO_DH
1703 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
06ab81f9
BL		 1704 {
1705 if (dh == NULL
1706 || DH_size(dh) > SSL_EXPORT_PKEYLENGTH(algs))
d02b48c6
RE		 1707 {
1708 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
1709 goto f_err;
1710 }
1711 }
1712 else
1713#endif
1714 {
1715 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1716 goto f_err;
1717 }
1718 }
1719 return(1);
1720f_err:
58964a49 1721 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
d02b48c6
RE		 1722err:
1723 return(0);
1724 }
1725
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