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Import of old SSLeay release: SSLeay 0.9.0b
[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
77static int ssl3_client_hello(SSL *s);
78static int ssl3_get_server_hello(SSL *s);
79static int ssl3_get_certificate_request(SSL *s);
80static int ca_dn_cmp(X509_NAME **a,X509_NAME **b);
81static int ssl3_get_server_done(SSL *s);
82static int ssl3_send_client_verify(SSL *s);
83static int ssl3_send_client_certificate(SSL *s);
84static int ssl3_send_client_key_exchange(SSL *s);
85static int ssl3_get_key_exchange(SSL *s);
86static int ssl3_get_server_certificate(SSL *s);
87static int ssl3_check_cert_and_algorithm(SSL *s);
88#else
89static int ssl3_client_hello();
90static int ssl3_get_server_hello();
91static int ssl3_get_certificate_request();
92static int ca_dn_cmp();
93static int ssl3_get_server_done();
94static int ssl3_send_client_verify();
95static int ssl3_send_client_certificate();
96static int ssl3_send_client_key_exchange();
97static int ssl3_get_key_exchange();
98static int ssl3_get_server_certificate();
99static int ssl3_check_cert_and_algorithm();
100#endif
101
102static SSL_METHOD *ssl3_get_client_method(ver)
103int ver;
104 {
58964a49 105 if (ver == SSL3_VERSION)
d02b48c6
RE		 106 return(SSLv3_client_method());
107 else
108 return(NULL);
109 }
110
111SSL_METHOD *SSLv3_client_method()
112 {
113 static int init=1;
114 static SSL_METHOD SSLv3_client_data;
115
116 if (init)
117 {
118 init=0;
119 memcpy((char *)&SSLv3_client_data,(char *)sslv3_base_method(),
120 sizeof(SSL_METHOD));
121 SSLv3_client_data.ssl_connect=ssl3_connect;
122 SSLv3_client_data.get_ssl_method=ssl3_get_client_method;
123 }
124 return(&SSLv3_client_data);
125 }
126
127int ssl3_connect(s)
128SSL *s;
129 {
130 BUF_MEM *buf;
131 unsigned long Time=time(NULL),l;
132 long num1;
133 void (*cb)()=NULL;
134 int ret= -1;
58964a49 135 BIO *under;
d02b48c6
RE		 136 int new_state,state,skip=0;;
137
138 RAND_seed((unsigned char *)&Time,sizeof(Time));
139 ERR_clear_error();
58964a49 140 clear_sys_error();
d02b48c6
RE		 141
142 if (s->info_callback != NULL)
143 cb=s->info_callback;
144 else if (s->ctx->info_callback != NULL)
145 cb=s->ctx->info_callback;
146
147 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
148 s->in_handshake++;
149
150 for (;;)
151 {
152 state=s->state;
153
154 switch(s->state)
155 {
156 case SSL_ST_RENEGOTIATE:
157 s->new_session=1;
158 s->state=SSL_ST_CONNECT;
58964a49 159 s->ctx->sess_connect_renegotiate++;
d02b48c6
RE		 160 /* break */
161 case SSL_ST_BEFORE:
162 case SSL_ST_CONNECT:
163 case SSL_ST_BEFORE|SSL_ST_CONNECT:
164 case SSL_ST_OK|SSL_ST_CONNECT:
165
166 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
167
58964a49
RE		 168 if ((s->version & 0xff00 ) != 0x0300)
169 abort();
170 /* s->version=SSL3_VERSION; */
d02b48c6
RE		 171 s->type=SSL_ST_CONNECT;
172
173 if (s->init_buf == NULL)
174 {
175 if ((buf=BUF_MEM_new()) == NULL)
176 {
177 ret= -1;
178 goto end;
179 }
180 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
181 {
182 ret= -1;
183 goto end;
184 }
185 s->init_buf=buf;
186 }
187
188 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
189
190 /* setup buffing BIO */
58964a49 191 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
d02b48c6
RE		 192
193 /* don't push the buffering BIO quite yet */
194
195 ssl3_init_finished_mac(s);
196
197 s->state=SSL3_ST_CW_CLNT_HELLO_A;
198 s->ctx->sess_connect++;
199 s->init_num=0;
200 break;
201
202 case SSL3_ST_CW_CLNT_HELLO_A:
203 case SSL3_ST_CW_CLNT_HELLO_B:
204
205 s->shutdown=0;
206 ret=ssl3_client_hello(s);
207 if (ret <= 0) goto end;
208 s->state=SSL3_ST_CR_SRVR_HELLO_A;
209 s->init_num=0;
210
211 /* turn on buffering for the next lot of output */
58964a49
RE		 212 if (s->bbio != s->wbio)
213 s->wbio=BIO_push(s->bbio,s->wbio);
d02b48c6
RE		 214
215 break;
216
217 case SSL3_ST_CR_SRVR_HELLO_A:
218 case SSL3_ST_CR_SRVR_HELLO_B:
219 ret=ssl3_get_server_hello(s);
220 if (ret <= 0) goto end;
221 if (s->hit)
222 s->state=SSL3_ST_CR_FINISHED_A;
223 else
224 s->state=SSL3_ST_CR_CERT_A;
225 s->init_num=0;
226 break;
227
228 case SSL3_ST_CR_CERT_A:
229 case SSL3_ST_CR_CERT_B:
230 /* Check if it is anon DH */
231 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
232 {
233 ret=ssl3_get_server_certificate(s);
234 if (ret <= 0) goto end;
235 }
236 else
237 skip=1;
238 s->state=SSL3_ST_CR_KEY_EXCH_A;
239 s->init_num=0;
240 break;
241
242 case SSL3_ST_CR_KEY_EXCH_A:
243 case SSL3_ST_CR_KEY_EXCH_B:
244 ret=ssl3_get_key_exchange(s);
245 if (ret <= 0) goto end;
246 s->state=SSL3_ST_CR_CERT_REQ_A;
247 s->init_num=0;
248
249 /* at this point we check that we have the
250 * required stuff from the server */
251 if (!ssl3_check_cert_and_algorithm(s))
252 {
253 ret= -1;
254 goto end;
255 }
256 break;
257
258 case SSL3_ST_CR_CERT_REQ_A:
259 case SSL3_ST_CR_CERT_REQ_B:
260 ret=ssl3_get_certificate_request(s);
261 if (ret <= 0) goto end;
262 s->state=SSL3_ST_CR_SRVR_DONE_A;
263 s->init_num=0;
264 break;
265
266 case SSL3_ST_CR_SRVR_DONE_A:
267 case SSL3_ST_CR_SRVR_DONE_B:
268 ret=ssl3_get_server_done(s);
269 if (ret <= 0) goto end;
270 if (s->s3->tmp.cert_req)
271 s->state=SSL3_ST_CW_CERT_A;
272 else
273 s->state=SSL3_ST_CW_KEY_EXCH_A;
274 s->init_num=0;
275
276 break;
277
278 case SSL3_ST_CW_CERT_A:
279 case SSL3_ST_CW_CERT_B:
280 case SSL3_ST_CW_CERT_C:
281 ret=ssl3_send_client_certificate(s);
282 if (ret <= 0) goto end;
283 s->state=SSL3_ST_CW_KEY_EXCH_A;
284 s->init_num=0;
285 break;
286
287 case SSL3_ST_CW_KEY_EXCH_A:
288 case SSL3_ST_CW_KEY_EXCH_B:
289 ret=ssl3_send_client_key_exchange(s);
290 if (ret <= 0) goto end;
291 l=s->s3->tmp.new_cipher->algorithms;
292 /* EAY EAY EAY need to check for DH fix cert
293 * sent back */
58964a49
RE		 294 /* For TLS, cert_req is set to 2, so a cert chain
295 * of nothing is sent, but no verify packet is sent */
296 if (s->s3->tmp.cert_req == 1)
d02b48c6
RE		 297 {
298 s->state=SSL3_ST_CW_CERT_VRFY_A;
299 }
300 else
301 {
302 s->state=SSL3_ST_CW_CHANGE_A;
303 s->s3->change_cipher_spec=0;
304 }
305
306 s->init_num=0;
307 break;
308
309 case SSL3_ST_CW_CERT_VRFY_A:
310 case SSL3_ST_CW_CERT_VRFY_B:
311 ret=ssl3_send_client_verify(s);
312 if (ret <= 0) goto end;
313 s->state=SSL3_ST_CW_CHANGE_A;
314 s->init_num=0;
315 s->s3->change_cipher_spec=0;
316 break;
317
318 case SSL3_ST_CW_CHANGE_A:
319 case SSL3_ST_CW_CHANGE_B:
320 ret=ssl3_send_change_cipher_spec(s,
321 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
322 if (ret <= 0) goto end;
323 s->state=SSL3_ST_CW_FINISHED_A;
324 s->init_num=0;
325
326 s->session->cipher=s->s3->tmp.new_cipher;
58964a49 327 if (!s->method->ssl3_enc->setup_key_block(s))
d02b48c6
RE		 328 {
329 ret= -1;
330 goto end;
331 }
332
58964a49 333 if (!s->method->ssl3_enc->change_cipher_state(s,
d02b48c6
RE		 334 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
335 {
336 ret= -1;
337 goto end;
338 }
339
340 break;
341
342 case SSL3_ST_CW_FINISHED_A:
343 case SSL3_ST_CW_FINISHED_B:
344 ret=ssl3_send_finished(s,
345 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
58964a49
RE		 346 s->method->ssl3_enc->client_finished,
347 s->method->ssl3_enc->client_finished_len);
d02b48c6
RE		 348 if (ret <= 0) goto end;
349 s->state=SSL3_ST_CW_FLUSH;
350
351 /* clear flags */
352 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
353 if (s->hit)
354 {
355 s->s3->tmp.next_state=SSL_ST_OK;
356 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
357 {
358 s->state=SSL_ST_OK;
359 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
360 s->s3->delay_buf_pop_ret=0;
361 }
362 }
363 else
364 {
365 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
366 }
367 s->init_num=0;
368 break;
369
370 case SSL3_ST_CR_FINISHED_A:
371 case SSL3_ST_CR_FINISHED_B:
372
373 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
58964a49 374 SSL3_ST_CR_FINISHED_B);
d02b48c6
RE		 375 if (ret <= 0) goto end;
376
377 if (s->hit)
378 s->state=SSL3_ST_CW_CHANGE_A;
379 else
380 s->state=SSL_ST_OK;
381 s->init_num=0;
382 break;
383
384 case SSL3_ST_CW_FLUSH:
385 /* number of bytes to be flushed */
386 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
387 if (num1 > 0)
388 {
389 s->rwstate=SSL_WRITING;
390 num1=BIO_flush(s->wbio);
391 if (num1 <= 0) { ret= -1; goto end; }
392 s->rwstate=SSL_NOTHING;
393 }
394
395 s->state=s->s3->tmp.next_state;
396 break;
397
398 case SSL_ST_OK:
399 /* clean a few things up */
400 ssl3_cleanup_key_block(s);
401
402 BUF_MEM_free(s->init_buf);
403 s->init_buf=NULL;
404
405 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
406 {
407 /* remove buffering */
408 under=BIO_pop(s->wbio);
409 if (under != NULL)
410 s->wbio=under;
411 else
412 abort(); /* ok */
413
414 BIO_free(s->bbio);
415 s->bbio=NULL;
416 }
417 /* else do it later */
418
419 s->init_num=0;
420 s->new_session=0;
421
422 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
58964a49 423 if (s->hit) s->ctx->sess_hit++;
d02b48c6
RE		 424
425 ret=1;
426 /* s->server=0; */
427 s->handshake_func=ssl3_connect;
428 s->ctx->sess_connect_good++;
429
430 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
431
432 goto end;
433 break;
434
435 default:
436 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
437 ret= -1;
438 goto end;
439 /* break; */
440 }
441
442 /* did we do anything */
443 if (!s->s3->tmp.reuse_message && !skip)
444 {
58964a49
RE		 445 if (s->debug)
446 {
447 if ((ret=BIO_flush(s->wbio)) <= 0)
448 goto end;
449 }
d02b48c6
RE		 450
451 if ((cb != NULL) && (s->state != state))
452 {
453 new_state=s->state;
454 s->state=state;
455 cb(s,SSL_CB_CONNECT_LOOP,1);
456 s->state=new_state;
457 }
458 }
459 skip=0;
460 }
461end:
462 if (cb != NULL)
463 cb(s,SSL_CB_CONNECT_EXIT,ret);
464 s->in_handshake--;
465 return(ret);
466 }
467
468
469static int ssl3_client_hello(s)
470SSL *s;
471 {
472 unsigned char *buf;
473 unsigned char *p,*d;
474 int i;
475 unsigned long Time,l;
476
477 buf=(unsigned char *)s->init_buf->data;
478 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
479 {
480 if ((s->session == NULL) ||
481 (s->session->ssl_version != s->version))
482 {
483 if (!ssl_get_new_session(s,0))
484 goto err;
485 }
486 /* else use the pre-loaded session */
487
488 p=s->s3->client_random;
489 Time=time(NULL); /* Time */
490 l2n(Time,p);
491 RAND_bytes(&(p[4]),SSL3_RANDOM_SIZE-sizeof(Time));
492
493 /* Do the message type and length last */
494 d=p= &(buf[4]);
495
58964a49
RE		 496 *(p++)=s->version>>8;
497 *(p++)=s->version&0xff;
d02b48c6
RE		 498
499 /* Random stuff */
500 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
501 p+=SSL3_RANDOM_SIZE;
502
503 /* Session ID */
504 if (s->new_session)
505 i=0;
506 else
507 i=s->session->session_id_length;
508 *(p++)=i;
509 if (i != 0)
510 {
511 memcpy(p,s->session->session_id,i);
512 p+=i;
513 }
514
515 /* Ciphers supported */
516 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]));
517 if (i == 0)
518 {
519 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
520 goto err;
521 }
522 s2n(i,p);
523 p+=i;
524
525 /* hardwire in the NULL compression algorithm. */
526 *(p++)=1;
527 *(p++)=0;
528
529 l=(p-d);
530 d=buf;
531 *(d++)=SSL3_MT_CLIENT_HELLO;
532 l2n3(l,d);
533
534 s->state=SSL3_ST_CW_CLNT_HELLO_B;
535 /* number of bytes to write */
536 s->init_num=p-buf;
537 s->init_off=0;
538 }
539
540 /* SSL3_ST_CW_CLNT_HELLO_B */
541 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
542err:
543 return(-1);
544 }
545
546static int ssl3_get_server_hello(s)
547SSL *s;
548 {
549 STACK *sk;
550 SSL_CIPHER *c;
551 unsigned char *p,*d;
552 int i,al,ok;
553 unsigned int j;
554 long n;
555
556 n=ssl3_get_message(s,
557 SSL3_ST_CR_SRVR_HELLO_A,
558 SSL3_ST_CR_SRVR_HELLO_B,
559 SSL3_MT_SERVER_HELLO,
560 300, /* ?? */
561 &ok);
562
563 if (!ok) return((int)n);
564 d=p=(unsigned char *)s->init_buf->data;
565
58964a49 566 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
d02b48c6
RE		 567 {
568 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
58964a49
RE		 569 s->version=(s->version&0xff00)|p[1];
570 al=SSL_AD_PROTOCOL_VERSION;
571 goto f_err;
d02b48c6
RE		 572 }
573 p+=2;
574
575 /* load the server hello data */
576 /* load the server random */
577 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
578 p+=SSL3_RANDOM_SIZE;
579
580 /* get the session-id */
581 j= *(p++);
582
583 if ((j != 0) && (j != SSL3_SESSION_ID_SIZE))
584 {
585 /* SSLref returns 16 :-( */
586 if (j < SSL2_SSL_SESSION_ID_LENGTH)
587 {
58964a49 588 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 589 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_SHORT);
590 goto f_err;
591 }
592 }
58964a49 593 if ((j != 0) && (j == s->session->session_id_length) &&
d02b48c6
RE		 594 (memcmp(p,s->session->session_id,j) == 0))
595 s->hit=1;
58964a49 596 else /* a miss or crap from the other end */
d02b48c6 597 {
58964a49
RE		 598 /* If we were trying for session-id reuse, make a new
599 * SSL_SESSION so we don't stuff up other people */
d02b48c6 600 s->hit=0;
58964a49
RE		 601 if (s->session->session_id_length > 0)
602 {
603 if (!ssl_get_new_session(s,0))
604 {
605 al=SSL_AD_INTERNAL_ERROR;
606 goto f_err;
607 }
608 }
609 s->session->session_id_length=j;
610 memcpy(s->session->session_id,p,j); /* j could be 0 */
d02b48c6
RE		 611 }
612 p+=j;
613 c=ssl_get_cipher_by_char(s,p);
614 if (c == NULL)
615 {
616 /* unknown cipher */
58964a49 617 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 618 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
619 goto f_err;
620 }
621 p+=ssl_put_cipher_by_char(s,NULL,NULL);
622
623 sk=ssl_get_ciphers_by_id(s);
624 i=sk_find(sk,(char *)c);
625 if (i < 0)
626 {
627 /* we did not say we would use this cipher */
58964a49 628 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 629 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
630 goto f_err;
631 }
632
633 if (s->hit && (s->session->cipher != c))
634 {
58964a49 635 if (!(s->options &
d02b48c6
RE		 636 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
637 {
58964a49 638 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 639 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
640 goto f_err;
641 }
642 }
643 s->s3->tmp.new_cipher=c;
644
645 /* lets get the compression algorithm */
646 j= *(p++);
647 if (j != 0)
648 {
58964a49 649 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 650 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
651 goto f_err;
652 }
653
654 if (p != (d+n))
655 {
656 /* wrong packet length */
58964a49 657 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 658 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
659 goto err;
660 }
661
662 return(1);
663f_err:
664 ssl3_send_alert(s,SSL3_AL_FATAL,al);
665err:
666 return(-1);
667 }
668
669static int ssl3_get_server_certificate(s)
670SSL *s;
671 {
672 int al,i,ok,ret= -1;
673 unsigned long n,nc,llen,l;
674 X509 *x=NULL;
675 unsigned char *p,*d,*q;
676 STACK *sk=NULL;
677 CERT *c;
678 EVP_PKEY *pkey=NULL;
679
680 n=ssl3_get_message(s,
681 SSL3_ST_CR_CERT_A,
682 SSL3_ST_CR_CERT_B,
683 -1,
684#if defined(MSDOS) && !defined(WIN32)
685 1024*30, /* 30k max cert list :-) */
686#else
687 1024*100, /* 100k max cert list :-) */
688#endif
689 &ok);
690
691 if (!ok) return((int)n);
692
693 if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE)
694 {
695 s->s3->tmp.reuse_message=1;
696 return(1);
697 }
698
699 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
700 {
58964a49 701 al=SSL_AD_UNEXPECTED_MESSAGE;
d02b48c6
RE		 702 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
703 goto f_err;
704 }
705 d=p=(unsigned char *)s->init_buf->data;
706
707 if ((sk=sk_new_null()) == NULL)
708 {
709 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
710 goto err;
711 }
712
713 n2l3(p,llen);
714 if (llen+3 != n)
715 {
58964a49 716 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 717 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
718 goto f_err;
719 }
720 for (nc=0; nc<llen; )
721 {
722 n2l3(p,l);
723 if ((l+nc+3) > llen)
724 {
58964a49 725 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 726 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
727 goto f_err;
728 }
729
730 q=p;
731 x=d2i_X509(NULL,&q,l);
732 if (x == NULL)
733 {
58964a49 734 al=SSL_AD_BAD_CERTIFICATE;
d02b48c6
RE		 735 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
736 goto f_err;
737 }
738 if (q != (p+l))
739 {
58964a49 740 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 741 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
742 goto f_err;
743 }
744 if (!sk_push(sk,(char *)x))
745 {
746 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
747 goto err;
748 }
749 x=NULL;
750 nc+=l+3;
751 p=q;
752 }
753
754 i=ssl_verify_cert_chain(s,sk);
755 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i))
756 {
757 al=ssl_verify_alarm_type(s->verify_result);
758 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
759 goto f_err;
760 }
761
762 c=ssl_cert_new();
763 if (c == NULL) goto err;
764
765 if (s->session->cert) ssl_cert_free(s->session->cert);
766 s->session->cert=c;
767
768 c->cert_chain=sk;
769 x=(X509 *)sk_value(sk,0);
770 sk=NULL;
771
772 pkey=X509_get_pubkey(x);
773
774 if (EVP_PKEY_missing_parameters(pkey))
775 {
776 x=NULL;
777 al=SSL3_AL_FATAL;
778 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
779 goto f_err;
780 }
781
782 i=ssl_cert_type(x,pkey);
783 if (i < 0)
784 {
785 x=NULL;
786 al=SSL3_AL_FATAL;
787 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNKNOWN_CERTIFICATE_TYPE);
788 goto f_err;
789 }
790
791 c->cert_type=i;
58964a49 792 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
d02b48c6
RE		 793 if (c->pkeys[i].x509 != NULL)
794 X509_free(c->pkeys[i].x509);
795 c->pkeys[i].x509=x;
796 c->key= &(c->pkeys[i]);
797
798 if ((s->session != NULL) && (s->session->peer != NULL))
799 X509_free(s->session->peer);
58964a49 800 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
d02b48c6
RE		 801 s->session->peer=x;
802
803 x=NULL;
804 ret=1;
805
806 if (0)
807 {
808f_err:
809 ssl3_send_alert(s,SSL3_AL_FATAL,al);
810 }
811err:
812 if (x != NULL) X509_free(x);
813 if (sk != NULL) sk_pop_free(sk,X509_free);
814 return(ret);
815 }
816
817static int ssl3_get_key_exchange(s)
818SSL *s;
819 {
820#ifndef NO_RSA
821 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
822#endif
823 EVP_MD_CTX md_ctx;
824 unsigned char *param,*p;
825 int al,i,j,param_len,ok;
826 long n,alg;
827 EVP_PKEY *pkey=NULL;
828 RSA *rsa=NULL;
58964a49 829#ifndef NO_DH
d02b48c6 830 DH *dh=NULL;
58964a49 831#endif
d02b48c6
RE		 832
833 n=ssl3_get_message(s,
834 SSL3_ST_CR_KEY_EXCH_A,
835 SSL3_ST_CR_KEY_EXCH_B,
836 -1,
837 1024*8, /* ?? */
838 &ok);
839
840 if (!ok) return((int)n);
841
842 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
843 {
844 s->s3->tmp.reuse_message=1;
845 return(1);
846 }
847
848 param=p=(unsigned char *)s->init_buf->data;
849
850 if (s->session->cert != NULL)
851 {
852#ifndef NO_RSA
853 if (s->session->cert->rsa_tmp != NULL)
854 {
855 RSA_free(s->session->cert->rsa_tmp);
856 s->session->cert->rsa_tmp=NULL;
857 }
858#endif
859#ifndef NO_DH
860 if (s->session->cert->dh_tmp)
861 {
862 DH_free(s->session->cert->dh_tmp);
863 s->session->cert->dh_tmp=NULL;
864 }
865#endif
866 }
867 else
868 {
869 s->session->cert=ssl_cert_new();
870 }
871
872 param_len=0;
873 alg=s->s3->tmp.new_cipher->algorithms;
874
875#ifndef NO_RSA
876 if (alg & SSL_kRSA)
877 {
878 if ((rsa=RSA_new()) == NULL)
879 {
880 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
881 goto err;
882 }
883 n2s(p,i);
884 param_len=i+2;
885 if (param_len > n)
886 {
58964a49 887 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 888 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
889 goto f_err;
890 }
891 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
892 {
893 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
894 goto err;
895 }
896 p+=i;
897
898 n2s(p,i);
899 param_len+=i+2;
900 if (param_len > n)
901 {
58964a49 902 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 903 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
904 goto f_err;
905 }
906 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
907 {
908 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
909 goto err;
910 }
911 p+=i;
912 n-=param_len;
913
914/* s->session->cert->rsa_tmp=rsa;*/
915 /* this should be because we are using an export cipher */
916 if (alg & SSL_aRSA)
917 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_RSA_ENC].x509);
918 else
919 {
920 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
921 goto err;
922 }
923 s->session->cert->rsa_tmp=rsa;
924 }
925 else
926#endif
927#ifndef NO_DH
928 if (alg & SSL_kEDH)
929 {
930 if ((dh=DH_new()) == NULL)
931 {
932 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
933 goto err;
934 }
935 n2s(p,i);
936 param_len=i+2;
937 if (param_len > n)
938 {
58964a49 939 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 940 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
941 goto f_err;
942 }
943 if (!(dh->p=BN_bin2bn(p,i,NULL)))
944 {
945 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
946 goto err;
947 }
948 p+=i;
949
950 n2s(p,i);
951 param_len+=i+2;
952 if (param_len > n)
953 {
58964a49 954 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 955 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
956 goto f_err;
957 }
958 if (!(dh->g=BN_bin2bn(p,i,NULL)))
959 {
960 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
961 goto err;
962 }
963 p+=i;
964
965 n2s(p,i);
966 param_len+=i+2;
967 if (param_len > n)
968 {
58964a49 969 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 970 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
971 goto f_err;
972 }
973 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
974 {
975 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
976 goto err;
977 }
978 p+=i;
979 n-=param_len;
980
981#ifndef NO_RSA
982 if (alg & SSL_aRSA)
983 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_RSA_ENC].x509);
984 else
985#endif
986#ifndef NO_DSA
987 if (alg & SSL_aDSS)
988 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_DSA_SIGN].x509);
989#endif
990 /* else anonymous DH, so no certificate or pkey. */
991
992 s->session->cert->dh_tmp=dh;
993 }
994 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
995 {
58964a49 996 al=SSL_AD_ILLEGAL_PARAMETER;
d02b48c6
RE		 997 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
998 goto f_err;
999 }
1000#endif
1001
1002 /* p points to the next byte, there are 'n' bytes left */
1003
1004
1005 /* if it was signed, check the signature */
1006 if (pkey != NULL)
1007 {
1008 n2s(p,i);
1009 n-=2;
1010 j=EVP_PKEY_size(pkey);
1011
1012 if ((i != n) || (n > j) || (n <= 0))
1013 {
1014 /* wrong packet length */
58964a49 1015 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 1016 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1017 goto err;
1018 }
1019
1020#ifndef NO_RSA
1021 if (pkey->type == EVP_PKEY_RSA)
1022 {
1023 int num;
1024
1025 j=0;
1026 q=md_buf;
1027 for (num=2; num > 0; num--)
1028 {
58964a49
RE		 1029 EVP_DigestInit(&md_ctx,(num == 2)
1030 ?s->ctx->md5:s->ctx->sha1);
d02b48c6
RE		 1031 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1032 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1033 EVP_DigestUpdate(&md_ctx,param,param_len);
1034 EVP_DigestFinal(&md_ctx,q,(unsigned int *)&i);
1035 q+=i;
1036 j+=i;
1037 }
1038 i=RSA_public_decrypt((int)n,p,p,pkey->pkey.rsa,
1039 RSA_PKCS1_PADDING);
1040 if (i <= 0)
1041 {
58964a49 1042 al=SSL_AD_DECRYPT_ERROR;
d02b48c6
RE		 1043 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1044 goto f_err;
1045 }
1046 if ((j != i) || (memcmp(p,md_buf,i) != 0))
1047 {
1048 /* bad signature */
58964a49 1049 al=SSL_AD_DECRYPT_ERROR;
d02b48c6
RE		 1050 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1051 goto f_err;
1052 }
1053 }
1054 else
1055#endif
1056#ifndef NO_DSA
1057 if (pkey->type == EVP_PKEY_DSA)
1058 {
1059 /* lets do DSS */
1060 EVP_VerifyInit(&md_ctx,EVP_dss1());
1061 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1062 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1063 EVP_VerifyUpdate(&md_ctx,param,param_len);
1064 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
1065 {
1066 /* bad signature */
58964a49 1067 al=SSL_AD_DECRYPT_ERROR;
d02b48c6
RE		 1068 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1069 goto f_err;
1070 }
1071 }
1072 else
1073#endif
1074 {
1075 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1076 goto err;
1077 }
1078 }
1079 else
1080 {
1081 /* still data left over */
1082 if (!(alg & SSL_aNULL))
1083 {
1084 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1085 goto err;
1086 }
1087 if (n != 0)
1088 {
58964a49 1089 al=SSL_AD_DECODE_ERROR;
d02b48c6
RE		 1090 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1091 goto f_err;
1092 }
1093 }
1094
1095 return(1);
1096f_err:
1097 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1098err:
1099 return(-1);
1100 }
1101
1102static int ssl3_get_certificate_request(s)
1103SSL *s;
1104 {
1105 int ok,ret=0;
58964a49
RE		 1106 unsigned long n,nc,l;
1107 unsigned int llen,ctype_num,i;
d02b48c6
RE		 1108 X509_NAME *xn=NULL;
1109 unsigned char *p,*d,*q;
1110 STACK *ca_sk=NULL;
1111
1112 n=ssl3_get_message(s,
1113 SSL3_ST_CR_CERT_REQ_A,
1114 SSL3_ST_CR_CERT_REQ_B,
1115 -1,
1116#if defined(MSDOS) && !defined(WIN32)
1117 1024*30, /* 30k max cert list :-) */
1118#else
1119 1024*100, /* 100k max cert list :-) */
1120#endif
1121 &ok);
1122
1123 if (!ok) return((int)n);
1124
1125 s->s3->tmp.cert_req=0;
1126
1127 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1128 {
1129 s->s3->tmp.reuse_message=1;
1130 return(1);
1131 }
1132
1133 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1134 {
58964a49 1135 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
d02b48c6
RE		 1136 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1137 goto err;
1138 }
1139
58964a49
RE		 1140 /* TLS does not like anon-DH with client cert */
1141 if (s->version > SSL3_VERSION)
1142 {
1143 l=s->s3->tmp.new_cipher->algorithms;
1144 if (l & SSL_aNULL)
1145 {
1146 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1147 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1148 goto err;
1149 }
1150 }
1151
d02b48c6
RE		 1152 d=p=(unsigned char *)s->init_buf->data;
1153
1154 if ((ca_sk=sk_new(ca_dn_cmp)) == NULL)
1155 {
1156 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1157 goto err;
1158 }
1159
1160 /* get the certificate types */
1161 ctype_num= *(p++);
1162 if (ctype_num > SSL3_CT_NUMBER)
1163 ctype_num=SSL3_CT_NUMBER;
1164 for (i=0; i<ctype_num; i++)
1165 s->s3->tmp.ctype[i]= p[i];
1166 p+=ctype_num;
1167
1168 /* get the CA RDNs */
1169 n2s(p,llen);
1170 if ((llen+ctype_num+2+1) != n)
1171 {
58964a49 1172 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
d02b48c6
RE		 1173 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1174 goto err;
1175 }
1176
1177 for (nc=0; nc<llen; )
1178 {
1179 n2s(p,l);
1180 if ((l+nc+2) > llen)
1181 {
58964a49 1182 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
d02b48c6 1183 goto cont; /* netscape bugs */
58964a49 1184 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
d02b48c6
RE		 1185 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1186 goto err;
1187 }
1188
1189 q=p;
1190
1191 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1192 {
1193 /* If netscape tollerance is on, ignore errors */
58964a49 1194 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
d02b48c6
RE		 1195 goto cont;
1196 else
1197 {
58964a49 1198 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
d02b48c6
RE		 1199 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
1200 goto err;
1201 }
1202 }
1203
1204 if (q != (p+l))
1205 {
58964a49 1206 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
d02b48c6
RE		 1207 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
1208 goto err;
1209 }
1210 if (!sk_push(ca_sk,(char *)xn))
1211 {
1212 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1213 goto err;
1214 }
1215
1216 p+=l;
1217 nc+=l+2;
1218 }
1219
1220 if (0)
1221 {
1222cont:
1223 ERR_clear_error();
1224 }
1225
1226 /* we should setup a certficate to return.... */
1227 s->s3->tmp.cert_req=1;
1228 s->s3->tmp.ctype_num=ctype_num;
1229 if (s->s3->tmp.ca_names != NULL)
1230 sk_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1231 s->s3->tmp.ca_names=ca_sk;
1232 ca_sk=NULL;
1233
1234 ret=1;
1235err:
1236 if (ca_sk != NULL) sk_pop_free(ca_sk,X509_NAME_free);
1237 return(ret);
1238 }
1239
1240static int ca_dn_cmp(a,b)
1241X509_NAME **a,**b;
1242 {
1243 return(X509_NAME_cmp(*a,*b));
1244 }
1245
1246static int ssl3_get_server_done(s)
1247SSL *s;
1248 {
1249 int ok,ret=0;
1250 long n;
1251
1252 n=ssl3_get_message(s,
1253 SSL3_ST_CR_SRVR_DONE_A,
1254 SSL3_ST_CR_SRVR_DONE_B,
1255 SSL3_MT_SERVER_DONE,
1256 30, /* should be very small, like 0 :-) */
1257 &ok);
1258
1259 if (!ok) return((int)n);
1260 if (n > 0)
1261 {
1262 /* should contain no data */
58964a49 1263 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
d02b48c6
RE		 1264 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1265 }
1266 ret=1;
1267 return(ret);
1268 }
1269
1270static int ssl3_send_client_key_exchange(s)
1271SSL *s;
1272 {
58964a49 1273 unsigned char *p,*q,*d;
d02b48c6
RE		 1274 int n;
1275 unsigned long l;
1276 EVP_PKEY *pkey=NULL;
1277
1278 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
1279 {
1280 d=(unsigned char *)s->init_buf->data;
1281 p= &(d[4]);
1282
1283 l=s->s3->tmp.new_cipher->algorithms;
1284
1285#ifndef NO_RSA
1286 if (l & SSL_kRSA)
1287 {
1288 RSA *rsa;
1289 unsigned char tmp_buf[48];
1290
1291 if (s->session->cert->rsa_tmp != NULL)
1292 rsa=s->session->cert->rsa_tmp;
1293 else
1294 {
1295 pkey=X509_get_pubkey(s->session->cert->pkeys[SSL_PKEY_RSA_ENC].x509);
1296 if ((pkey == NULL) ||
1297 (pkey->type != EVP_PKEY_RSA) ||
1298 (pkey->pkey.rsa == NULL))
1299 {
1300 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
1301 goto err;
1302 }
1303 rsa=pkey->pkey.rsa;
1304 }
1305
58964a49
RE		 1306 tmp_buf[0]=s->version>>8;
1307 tmp_buf[1]=s->version&0xff;
d02b48c6
RE		 1308 RAND_bytes(&(tmp_buf[2]),SSL_MAX_MASTER_KEY_LENGTH-2);
1309
1310 s->session->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
1311
58964a49
RE		 1312 q=p;
1313 /* Fix buf for TLS and beyond */
1314 if (s->version > SSL3_VERSION)
1315 p+=2;
1316 n=RSA_public_encrypt(SSL_MAX_MASTER_KEY_LENGTH,
1317 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
d02b48c6
RE		 1318 if (n <= 0)
1319 {
1320 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
1321 goto err;
1322 }
1323
58964a49
RE		 1324 /* Fix buf for TLS and beyond */
1325 if (s->version > SSL3_VERSION)
1326 {
1327 s2n(n,q);
1328 n+=2;
1329 }
1330
d02b48c6 1331 s->session->master_key_length=
58964a49 1332 s->method->ssl3_enc->generate_master_secret(s,
d02b48c6
RE		 1333 s->session->master_key,
1334 tmp_buf,48);
1335 memset(tmp_buf,0,48);
1336 }
1337 else
1338#endif
1339#ifndef NO_DH
1340 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1341 {
1342 DH *dh_srvr,*dh_clnt;
1343
1344 if (s->session->cert->dh_tmp != NULL)
1345 dh_srvr=s->session->cert->dh_tmp;
1346 else
1347 {
1348 /* we get them from the cert */
58964a49 1349 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
d02b48c6
RE		 1350 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
1351 goto err;
1352 }
1353
1354 /* generate a new random key */
1355 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
1356 {
1357 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1358 goto err;
1359 }
1360 if (!DH_generate_key(dh_clnt))
1361 {
1362 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1363 goto err;
1364 }
1365
1366 /* use the 'p' output buffer for the DH key, but
1367 * make sure to clear it out afterwards */
58964a49 1368
d02b48c6 1369 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
58964a49 1370
d02b48c6
RE		 1371 if (n <= 0)
1372 {
1373 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1374 goto err;
1375 }
1376
1377 /* generate master key from the result */
1378 s->session->master_key_length=
58964a49 1379 s->method->ssl3_enc->generate_master_secret(s,
d02b48c6
RE		 1380 s->session->master_key,p,n);
1381 /* clean up */
1382 memset(p,0,n);
1383
1384 /* send off the data */
1385 n=BN_num_bytes(dh_clnt->pub_key);
1386 s2n(n,p);
1387 BN_bn2bin(dh_clnt->pub_key,p);
1388 n+=2;
1389
1390 DH_free(dh_clnt);
1391
1392 /* perhaps clean things up a bit EAY EAY EAY EAY*/
1393 }
1394 else
1395#endif
1396 {
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_INTERNAL_ERROR);
1399 goto err;
1400 }
1401
1402 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
1403 l2n3(n,d);
1404
1405 s->state=SSL3_ST_CW_KEY_EXCH_B;
1406 /* number of bytes to write */
1407 s->init_num=n+4;
1408 s->init_off=0;
1409 }
1410
1411 /* SSL3_ST_CW_KEY_EXCH_B */
1412 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1413err:
1414 return(-1);
1415 }
1416
1417static int ssl3_send_client_verify(s)
1418SSL *s;
1419 {
1420 unsigned char *p,*d;
1421 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1422 EVP_PKEY *pkey;
58964a49 1423 int i=0;
d02b48c6 1424 unsigned long n;
58964a49
RE		 1425#ifndef NO_DSA
1426 int j;
1427#endif
d02b48c6
RE		 1428
1429 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
1430 {
1431 d=(unsigned char *)s->init_buf->data;
1432 p= &(d[4]);
1433 pkey=s->cert->key->privatekey;
1434
58964a49
RE		 1435 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
1436 &(data[MD5_DIGEST_LENGTH]));
d02b48c6
RE		 1437
1438#ifndef NO_RSA
1439 if (pkey->type == EVP_PKEY_RSA)
1440 {
58964a49
RE		 1441 s->method->ssl3_enc->cert_verify_mac(s,
1442 &(s->s3->finish_dgst1),&(data[0]));
d02b48c6
RE		 1443 i=RSA_private_encrypt(
1444 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
1445 data,&(p[2]),pkey->pkey.rsa,
1446 RSA_PKCS1_PADDING);
1447 if (i <= 0)
1448 {
1449 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
1450 goto err;
1451 }
1452 s2n(i,p);
1453 n=i+2;
1454 }
1455 else
1456#endif
1457#ifndef NO_DSA
1458 if (pkey->type == EVP_PKEY_DSA)
1459 {
1460 if (!DSA_sign(pkey->save_type,
1461 &(data[MD5_DIGEST_LENGTH]),
1462 SHA_DIGEST_LENGTH,&(p[2]),
1463 (unsigned int *)&j,pkey->pkey.dsa))
1464 {
1465 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
1466 goto err;
1467 }
1468 s2n(j,p);
1469 n=j+2;
1470 }
1471 else
1472#endif
1473 {
1474 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,SSL_R_INTERNAL_ERROR);
1475 goto err;
1476 }
1477 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
1478 l2n3(n,d);
1479
1480 s->init_num=(int)n+4;
1481 s->init_off=0;
1482 }
1483 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1484err:
1485 return(-1);
1486 }
1487
1488static int ssl3_send_client_certificate(s)
1489SSL *s;
1490 {
1491 X509 *x509=NULL;
1492 EVP_PKEY *pkey=NULL;
1493 int i;
1494 unsigned long l;
1495
1496 if (s->state == SSL3_ST_CW_CERT_A)
1497 {
1498 if ((s->cert == NULL) ||
1499 (s->cert->key->x509 == NULL) ||
1500 (s->cert->key->privatekey == NULL))
1501 s->state=SSL3_ST_CW_CERT_B;
1502 else
1503 s->state=SSL3_ST_CW_CERT_C;
1504 }
1505
1506 /* We need to get a client cert */
1507 if (s->state == SSL3_ST_CW_CERT_B)
1508 {
1509 /* If we get an error, we need to
1510 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
1511 * We then get retied later */
1512 i=0;
1513 if (s->ctx->client_cert_cb != NULL)
1514 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
1515 if (i < 0)
1516 {
1517 s->rwstate=SSL_X509_LOOKUP;
1518 return(-1);
1519 }
1520 s->rwstate=SSL_NOTHING;
1521 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
1522 {
1523 s->state=SSL3_ST_CW_CERT_B;
1524 if ( !SSL_use_certificate(s,x509) ||
1525 !SSL_use_PrivateKey(s,pkey))
1526 i=0;
1527 }
1528 else if (i == 1)
1529 {
1530 i=0;
1531 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
1532 }
1533
1534 if (x509 != NULL) X509_free(x509);
1535 if (pkey != NULL) EVP_PKEY_free(pkey);
1536 if (i == 0)
1537 {
58964a49
RE		 1538 if (s->version == SSL3_VERSION)
1539 {
1540 s->s3->tmp.cert_req=0;
1541 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
1542 return(1);
1543 }
1544 else
1545 {
1546 s->s3->tmp.cert_req=2;
1547 }
d02b48c6
RE		 1548 }
1549
1550 /* Ok, we have a cert */
1551 s->state=SSL3_ST_CW_CERT_C;
1552 }
1553
1554 if (s->state == SSL3_ST_CW_CERT_C)
1555 {
1556 s->state=SSL3_ST_CW_CERT_D;
58964a49
RE		 1557 l=ssl3_output_cert_chain(s,
1558 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
d02b48c6
RE		 1559 s->init_num=(int)l;
1560 s->init_off=0;
1561 }
1562 /* SSL3_ST_CW_CERT_D */
1563 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1564 }
1565
1566#define has_bits(i,m) (((i)&(m)) == (m))
1567
1568static int ssl3_check_cert_and_algorithm(s)
1569SSL *s;
1570 {
1571 int i,idx;
1572 long algs;
1573 EVP_PKEY *pkey=NULL;
1574 CERT *c;
1575 RSA *rsa;
1576 DH *dh;
1577
1578 c=s->session->cert;
1579
1580 if (c == NULL)
1581 {
1582 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_INTERNAL_ERROR);
1583 goto err;
1584 }
1585
1586 algs=s->s3->tmp.new_cipher->algorithms;
1587
1588 /* we don't have a certificate */
1589 if (algs & (SSL_aDH|SSL_aNULL))
1590 return(1);
1591
1592 rsa=s->session->cert->rsa_tmp;
1593 dh=s->session->cert->dh_tmp;
1594
1595 /* This is the passed certificate */
1596
1597 idx=c->cert_type;
1598 pkey=X509_get_pubkey(c->pkeys[idx].x509);
1599 i=X509_certificate_type(c->pkeys[idx].x509,pkey);
1600
1601
1602 /* Check that we have a certificate if we require one */
1603 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
1604 {
1605 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
1606 goto f_err;
1607 }
1608#ifndef NO_DSA
1609 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
1610 {
1611 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
1612 goto f_err;
1613 }
1614#endif
1615
1616 if ((algs & SSL_kRSA) &&
1617 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
1618 {
1619 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
1620 goto f_err;
1621 }
1622#ifndef NO_DH
1623 else if ((algs & SSL_kEDH) &&
1624 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
1625 {
1626 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
1627 goto f_err;
1628 }
1629 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
1630 {
1631 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
1632 goto f_err;
1633 }
1634#ifndef NO_DSA
1635 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
1636 {
1637 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
1638 goto f_err;
1639 }
1640#endif
1641#endif
1642
1643 if ((algs & SSL_EXP) && !has_bits(i,EVP_PKT_EXP))
1644 {
1645#ifndef NO_RSA
1646 if (algs & SSL_kRSA)
1647 {
1648 if ((rsa == NULL) || (RSA_size(rsa) > 512))
1649 {
1650 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
1651 goto f_err;
1652 }
1653 }
1654 else
1655#endif
1656#ifndef NO_DH
1657 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1658 {
1659 if ((dh == NULL) || (DH_size(dh) > 512))
1660 {
1661 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
1662 goto f_err;
1663 }
1664 }
1665 else
1666#endif
1667 {
1668 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1669 goto f_err;
1670 }
1671 }
1672 return(1);
1673f_err:
58964a49 1674 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
d02b48c6
RE		 1675err:
1676 return(0);
1677 }
1678
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