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Import OpenSSL 0.9.8c
[dragonfly.git] / crypto / openssl-0.9 / ssl / s2_clnt.c
blobefb52485a71439e5807904eebca704d6b5dc331e
1 /* ssl/s2_clnt.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58 /* ====================================================================
59 * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved.
60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 *
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
71 * distribution.
72 *
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 *
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
82 *
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 * acknowledgment:
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
105 *
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
109 *
110 */
111
112 #include "ssl_locl.h"
113 #ifndef OPENSSL_NO_SSL2
114 #include <stdio.h>
115 #include <openssl/rand.h>
116 #include <openssl/buffer.h>
117 #include <openssl/objects.h>
118 #include <openssl/evp.h>
119
120 static SSL_METHOD *ssl2_get_client_method(int ver);
121 static int get_server_finished(SSL *s);
122 static int get_server_verify(SSL *s);
123 static int get_server_hello(SSL *s);
124 static int client_hello(SSL *s);
125 static int client_master_key(SSL *s);
126 static int client_finished(SSL *s);
127 static int client_certificate(SSL *s);
128 static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from,
129 unsigned char *to,int padding);
130 #define BREAK break
131
132 static SSL_METHOD *ssl2_get_client_method(int ver)
133 {
134 if (ver == SSL2_VERSION)
135 return(SSLv2_client_method());
136 else
137 return(NULL);
138 }
139
140 IMPLEMENT_ssl2_meth_func(SSLv2_client_method,
141 ssl_undefined_function,
142 ssl2_connect,
143 ssl2_get_client_method)
144
145 int ssl2_connect(SSL *s)
146 {
147 unsigned long l=(unsigned long)time(NULL);
148 BUF_MEM *buf=NULL;
149 int ret= -1;
150 void (*cb)(const SSL *ssl,int type,int val)=NULL;
151 int new_state,state;
152
153 RAND_add(&l,sizeof(l),0);
154 ERR_clear_error();
155 clear_sys_error();
156
157 if (s->info_callback != NULL)
158 cb=s->info_callback;
159 else if (s->ctx->info_callback != NULL)
160 cb=s->ctx->info_callback;
161
162 /* init things to blank */
163 s->in_handshake++;
164 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
165
166 for (;;)
167 {
168 state=s->state;
169
170 switch (s->state)
171 {
172 case SSL_ST_BEFORE:
173 case SSL_ST_CONNECT:
174 case SSL_ST_BEFORE|SSL_ST_CONNECT:
175 case SSL_ST_OK|SSL_ST_CONNECT:
176
177 s->server=0;
178 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
179
180 s->version=SSL2_VERSION;
181 s->type=SSL_ST_CONNECT;
182
183 buf=s->init_buf;
184 if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL))
185 {
186 ret= -1;
187 goto end;
188 }
189 if (!BUF_MEM_grow(buf,
190 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
191 {
192 if (buf == s->init_buf)
193 buf=NULL;
194 ret= -1;
195 goto end;
196 }
197 s->init_buf=buf;
198 buf=NULL;
199 s->init_num=0;
200 s->state=SSL2_ST_SEND_CLIENT_HELLO_A;
201 s->ctx->stats.sess_connect++;
202 s->handshake_func=ssl2_connect;
203 BREAK;
204
205 case SSL2_ST_SEND_CLIENT_HELLO_A:
206 case SSL2_ST_SEND_CLIENT_HELLO_B:
207 s->shutdown=0;
208 ret=client_hello(s);
209 if (ret <= 0) goto end;
210 s->init_num=0;
211 s->state=SSL2_ST_GET_SERVER_HELLO_A;
212 BREAK;
213
214 case SSL2_ST_GET_SERVER_HELLO_A:
215 case SSL2_ST_GET_SERVER_HELLO_B:
216 ret=get_server_hello(s);
217 if (ret <= 0) goto end;
218 s->init_num=0;
219 if (!s->hit) /* new session */
220 {
221 s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_A;
222 BREAK;
223 }
224 else
225 {
226 s->state=SSL2_ST_CLIENT_START_ENCRYPTION;
227 break;
228 }
229
230 case SSL2_ST_SEND_CLIENT_MASTER_KEY_A:
231 case SSL2_ST_SEND_CLIENT_MASTER_KEY_B:
232 ret=client_master_key(s);
233 if (ret <= 0) goto end;
234 s->init_num=0;
235 s->state=SSL2_ST_CLIENT_START_ENCRYPTION;
236 break;
237
238 case SSL2_ST_CLIENT_START_ENCRYPTION:
239 /* Ok, we now have all the stuff needed to
240 * start encrypting, so lets fire it up :-) */
241 if (!ssl2_enc_init(s,1))
242 {
243 ret= -1;
244 goto end;
245 }
246 s->s2->clear_text=0;
247 s->state=SSL2_ST_SEND_CLIENT_FINISHED_A;
248 break;
249
250 case SSL2_ST_SEND_CLIENT_FINISHED_A:
251 case SSL2_ST_SEND_CLIENT_FINISHED_B:
252 ret=client_finished(s);
253 if (ret <= 0) goto end;
254 s->init_num=0;
255 s->state=SSL2_ST_GET_SERVER_VERIFY_A;
256 break;
257
258 case SSL2_ST_GET_SERVER_VERIFY_A:
259 case SSL2_ST_GET_SERVER_VERIFY_B:
260 ret=get_server_verify(s);
261 if (ret <= 0) goto end;
262 s->init_num=0;
263 s->state=SSL2_ST_GET_SERVER_FINISHED_A;
264 break;
265
266 case SSL2_ST_GET_SERVER_FINISHED_A:
267 case SSL2_ST_GET_SERVER_FINISHED_B:
268 ret=get_server_finished(s);
269 if (ret <= 0) goto end;
270 break;
271
272 case SSL2_ST_SEND_CLIENT_CERTIFICATE_A:
273 case SSL2_ST_SEND_CLIENT_CERTIFICATE_B:
274 case SSL2_ST_SEND_CLIENT_CERTIFICATE_C:
275 case SSL2_ST_SEND_CLIENT_CERTIFICATE_D:
276 case SSL2_ST_X509_GET_CLIENT_CERTIFICATE:
277 ret=client_certificate(s);
278 if (ret <= 0) goto end;
279 s->init_num=0;
280 s->state=SSL2_ST_GET_SERVER_FINISHED_A;
281 break;
282
283 case SSL_ST_OK:
284 if (s->init_buf != NULL)
285 {
286 BUF_MEM_free(s->init_buf);
287 s->init_buf=NULL;
288 }
289 s->init_num=0;
290 /* ERR_clear_error();*/
291
292 /* If we want to cache session-ids in the client
293 * and we successfully add the session-id to the
294 * cache, and there is a callback, then pass it out.
295 * 26/11/96 - eay - only add if not a re-used session.
296 */
297
298 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
299 if (s->hit) s->ctx->stats.sess_hit++;
300
301 ret=1;
302 /* s->server=0; */
303 s->ctx->stats.sess_connect_good++;
304
305 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
306
307 goto end;
308 /* break; */
309 default:
310 SSLerr(SSL_F_SSL2_CONNECT,SSL_R_UNKNOWN_STATE);
311 return(-1);
312 /* break; */
313 }
314
315 if ((cb != NULL) && (s->state != state))
316 {
317 new_state=s->state;
318 s->state=state;
319 cb(s,SSL_CB_CONNECT_LOOP,1);
320 s->state=new_state;
321 }
322 }
323 end:
324 s->in_handshake--;
325 if (buf != NULL)
326 BUF_MEM_free(buf);
327 if (cb != NULL)
328 cb(s,SSL_CB_CONNECT_EXIT,ret);
329 return(ret);
330 }
331
332 static int get_server_hello(SSL *s)
333 {
334 unsigned char *buf;
335 unsigned char *p;
336 int i,j;
337 unsigned long len;
338 STACK_OF(SSL_CIPHER) *sk=NULL,*cl, *prio, *allow;
339
340 buf=(unsigned char *)s->init_buf->data;
341 p=buf;
342 if (s->state == SSL2_ST_GET_SERVER_HELLO_A)
343 {
344 i=ssl2_read(s,(char *)&(buf[s->init_num]),11-s->init_num);
345 if (i < (11-s->init_num))
346 return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i));
347 s->init_num = 11;
348
349 if (*(p++) != SSL2_MT_SERVER_HELLO)
350 {
351 if (p[-1] != SSL2_MT_ERROR)
352 {
353 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
354 SSLerr(SSL_F_GET_SERVER_HELLO,
355 SSL_R_READ_WRONG_PACKET_TYPE);
356 }
357 else
358 SSLerr(SSL_F_GET_SERVER_HELLO,
359 SSL_R_PEER_ERROR);
360 return(-1);
361 }
362 #ifdef __APPLE_CC__
363 /* The Rhapsody 5.5 (a.k.a. MacOS X) compiler bug
364 * workaround. <appro@fy.chalmers.se> */
365 s->hit=(i=*(p++))?1:0;
366 #else
367 s->hit=(*(p++))?1:0;
368 #endif
369 s->s2->tmp.cert_type= *(p++);
370 n2s(p,i);
371 if (i < s->version) s->version=i;
372 n2s(p,i); s->s2->tmp.cert_length=i;
373 n2s(p,i); s->s2->tmp.csl=i;
374 n2s(p,i); s->s2->tmp.conn_id_length=i;
375 s->state=SSL2_ST_GET_SERVER_HELLO_B;
376 }
377
378 /* SSL2_ST_GET_SERVER_HELLO_B */
379 len = 11 + (unsigned long)s->s2->tmp.cert_length + (unsigned long)s->s2->tmp.csl + (unsigned long)s->s2->tmp.conn_id_length;
380 if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
381 {
382 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_MESSAGE_TOO_LONG);
383 return -1;
384 }
385 j = (int)len - s->init_num;
386 i = ssl2_read(s,(char *)&(buf[s->init_num]),j);
387 if (i != j) return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i));
388 if (s->msg_callback)
389 s->msg_callback(0, s->version, 0, buf, (size_t)len, s, s->msg_callback_arg); /* SERVER-HELLO */
390
391 /* things are looking good */
392
393 p = buf + 11;
394 if (s->hit)
395 {
396 if (s->s2->tmp.cert_length != 0)
397 {
398 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_LENGTH_NOT_ZERO);
399 return(-1);
400 }
401 if (s->s2->tmp.cert_type != 0)
402 {
403 if (!(s->options &
404 SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG))
405 {
406 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_TYPE_NOT_ZERO);
407 return(-1);
408 }
409 }
410 if (s->s2->tmp.csl != 0)
411 {
412 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CIPHER_LIST_NOT_ZERO);
413 return(-1);
414 }
415 }
416 else
417 {
418 #ifdef undef
419 /* very bad */
420 memset(s->session->session_id,0,
421 SSL_MAX_SSL_SESSION_ID_LENGTH_IN_BYTES);
422 s->session->session_id_length=0;
423 */
424 #endif
425
426 /* we need to do this in case we were trying to reuse a
427 * client session but others are already reusing it.
428 * If this was a new 'blank' session ID, the session-id
429 * length will still be 0 */
430 if (s->session->session_id_length > 0)
431 {
432 if (!ssl_get_new_session(s,0))
433 {
434 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
435 return(-1);
436 }
437 }
438
439 if (ssl2_set_certificate(s,s->s2->tmp.cert_type,
440 s->s2->tmp.cert_length,p) <= 0)
441 {
442 ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
443 return(-1);
444 }
445 p+=s->s2->tmp.cert_length;
446
447 if (s->s2->tmp.csl == 0)
448 {
449 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
450 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_LIST);
451 return(-1);
452 }
453
454 /* We have just received a list of ciphers back from the
455 * server. We need to get the ones that match, then select
456 * the one we want the most :-). */
457
458 /* load the ciphers */
459 sk=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.csl,
460 &s->session->ciphers);
461 p+=s->s2->tmp.csl;
462 if (sk == NULL)
463 {
464 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
465 SSLerr(SSL_F_GET_SERVER_HELLO,ERR_R_MALLOC_FAILURE);
466 return(-1);
467 }
468
469 sk_SSL_CIPHER_set_cmp_func(sk,ssl_cipher_ptr_id_cmp);
470
471 /* get the array of ciphers we will accept */
472 cl=SSL_get_ciphers(s);
473 sk_SSL_CIPHER_set_cmp_func(cl,ssl_cipher_ptr_id_cmp);
474
475 /*
476 * If server preference flag set, choose the first
477 * (highest priority) cipher the server sends, otherwise
478 * client preference has priority.
479 */
480 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
481 {
482 prio = sk;
483 allow = cl;
484 }
485 else
486 {
487 prio = cl;
488 allow = sk;
489 }
490 /* In theory we could have ciphers sent back that we
491 * don't want to use but that does not matter since we
492 * will check against the list we originally sent and
493 * for performance reasons we should not bother to match
494 * the two lists up just to check. */
495 for (i=0; i<sk_SSL_CIPHER_num(prio); i++)
496 {
497 if (sk_SSL_CIPHER_find(allow,
498 sk_SSL_CIPHER_value(prio,i)) >= 0)
499 break;
500 }
501
502 if (i >= sk_SSL_CIPHER_num(prio))
503 {
504 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
505 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_MATCH);
506 return(-1);
507 }
508 s->session->cipher=sk_SSL_CIPHER_value(prio,i);
509
510
511 if (s->session->peer != NULL) /* can't happen*/
512 {
513 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
514 SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
515 return(-1);
516 }
517
518 s->session->peer = s->session->sess_cert->peer_key->x509;
519 /* peer_key->x509 has been set by ssl2_set_certificate. */
520 CRYPTO_add(&s->session->peer->references, 1, CRYPTO_LOCK_X509);
521 }
522
523 if (s->session->peer != s->session->sess_cert->peer_key->x509)
524 /* can't happen */
525 {
526 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
527 SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
528 return(-1);
529 }
530
531 s->s2->conn_id_length=s->s2->tmp.conn_id_length;
532 if (s->s2->conn_id_length > sizeof s->s2->conn_id)
533 {
534 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
535 SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_SSL2_CONNECTION_ID_TOO_LONG);
536 return -1;
537 }
538 memcpy(s->s2->conn_id,p,s->s2->tmp.conn_id_length);
539 return(1);
540 }
541
542 static int client_hello(SSL *s)
543 {
544 unsigned char *buf;
545 unsigned char *p,*d;
546 /* CIPHER **cipher;*/
547 int i,n,j;
548
549 buf=(unsigned char *)s->init_buf->data;
550 if (s->state == SSL2_ST_SEND_CLIENT_HELLO_A)
551 {
552 if ((s->session == NULL) ||
553 (s->session->ssl_version != s->version))
554 {
555 if (!ssl_get_new_session(s,0))
556 {
557 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
558 return(-1);
559 }
560 }
561 /* else use the pre-loaded session */
562
563 p=buf; /* header */
564 d=p+9; /* data section */
565 *(p++)=SSL2_MT_CLIENT_HELLO; /* type */
566 s2n(SSL2_VERSION,p); /* version */
567 n=j=0;
568
569 n=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),d,0);
570 d+=n;
571
572 if (n == 0)
573 {
574 SSLerr(SSL_F_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
575 return(-1);
576 }
577
578 s2n(n,p); /* cipher spec num bytes */
579
580 if ((s->session->session_id_length > 0) &&
581 (s->session->session_id_length <=
582 SSL2_MAX_SSL_SESSION_ID_LENGTH))
583 {
584 i=s->session->session_id_length;
585 s2n(i,p); /* session id length */
586 memcpy(d,s->session->session_id,(unsigned int)i);
587 d+=i;
588 }
589 else
590 {
591 s2n(0,p);
592 }
593
594 s->s2->challenge_length=SSL2_CHALLENGE_LENGTH;
595 s2n(SSL2_CHALLENGE_LENGTH,p); /* challenge length */
596 /*challenge id data*/
597 if (RAND_pseudo_bytes(s->s2->challenge,SSL2_CHALLENGE_LENGTH) <= 0)
598 return -1;
599 memcpy(d,s->s2->challenge,SSL2_CHALLENGE_LENGTH);
600 d+=SSL2_CHALLENGE_LENGTH;
601
602 s->state=SSL2_ST_SEND_CLIENT_HELLO_B;
603 s->init_num=d-buf;
604 s->init_off=0;
605 }
606 /* SSL2_ST_SEND_CLIENT_HELLO_B */
607 return(ssl2_do_write(s));
608 }
609
610 static int client_master_key(SSL *s)
611 {
612 unsigned char *buf;
613 unsigned char *p,*d;
614 int clear,enc,karg,i;
615 SSL_SESSION *sess;
616 const EVP_CIPHER *c;
617 const EVP_MD *md;
618
619 buf=(unsigned char *)s->init_buf->data;
620 if (s->state == SSL2_ST_SEND_CLIENT_MASTER_KEY_A)
621 {
622
623 if (!ssl_cipher_get_evp(s->session,&c,&md,NULL))
624 {
625 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
626 SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS);
627 return(-1);
628 }
629 sess=s->session;
630 p=buf;
631 d=p+10;
632 *(p++)=SSL2_MT_CLIENT_MASTER_KEY;/* type */
633
634 i=ssl_put_cipher_by_char(s,sess->cipher,p);
635 p+=i;
636
637 /* make key_arg data */
638 i=EVP_CIPHER_iv_length(c);
639 sess->key_arg_length=i;
640 if (i > SSL_MAX_KEY_ARG_LENGTH)
641 {
642 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
643 SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
644 return -1;
645 }
646 if (i > 0)
647 if (RAND_pseudo_bytes(sess->key_arg,i) <= 0)
648 return -1;
649
650 /* make a master key */
651 i=EVP_CIPHER_key_length(c);
652 sess->master_key_length=i;
653 if (i > 0)
654 {
655 if (i > (int)sizeof(sess->master_key))
656 {
657 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
658 SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
659 return -1;
660 }
661 if (RAND_bytes(sess->master_key,i) <= 0)
662 {
663 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
664 return(-1);
665 }
666 }
667
668 if (sess->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC)
669 enc=8;
670 else if (SSL_C_IS_EXPORT(sess->cipher))
671 enc=5;
672 else
673 enc=i;
674
675 if ((int)i < enc)
676 {
677 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
678 SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_CIPHER_TABLE_SRC_ERROR);
679 return(-1);
680 }
681 clear=i-enc;
682 s2n(clear,p);
683 memcpy(d,sess->master_key,(unsigned int)clear);
684 d+=clear;
685
686 enc=ssl_rsa_public_encrypt(sess->sess_cert,enc,
687 &(sess->master_key[clear]),d,
688 (s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING);
689 if (enc <= 0)
690 {
691 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
692 SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PUBLIC_KEY_ENCRYPT_ERROR);
693 return(-1);
694 }
695 #ifdef PKCS1_CHECK
696 if (s->options & SSL_OP_PKCS1_CHECK_1) d[1]++;
697 if (s->options & SSL_OP_PKCS1_CHECK_2)
698 sess->master_key[clear]++;
699 #endif
700 s2n(enc,p);
701 d+=enc;
702 karg=sess->key_arg_length;
703 s2n(karg,p); /* key arg size */
704 if (karg > (int)sizeof(sess->key_arg))
705 {
706 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
707 SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
708 return -1;
709 }
710 memcpy(d,sess->key_arg,(unsigned int)karg);
711 d+=karg;
712
713 s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_B;
714 s->init_num=d-buf;
715 s->init_off=0;
716 }
717
718 /* SSL2_ST_SEND_CLIENT_MASTER_KEY_B */
719 return(ssl2_do_write(s));
720 }
721
722 static int client_finished(SSL *s)
723 {
724 unsigned char *p;
725
726 if (s->state == SSL2_ST_SEND_CLIENT_FINISHED_A)
727 {
728 p=(unsigned char *)s->init_buf->data;
729 *(p++)=SSL2_MT_CLIENT_FINISHED;
730 if (s->s2->conn_id_length > sizeof s->s2->conn_id)
731 {
732 SSLerr(SSL_F_CLIENT_FINISHED, ERR_R_INTERNAL_ERROR);
733 return -1;
734 }
735 memcpy(p,s->s2->conn_id,(unsigned int)s->s2->conn_id_length);
736
737 s->state=SSL2_ST_SEND_CLIENT_FINISHED_B;
738 s->init_num=s->s2->conn_id_length+1;
739 s->init_off=0;
740 }
741 return(ssl2_do_write(s));
742 }
743
744 /* read the data and then respond */
745 static int client_certificate(SSL *s)
746 {
747 unsigned char *buf;
748 unsigned char *p,*d;
749 int i;
750 unsigned int n;
751 int cert_ch_len;
752 unsigned char *cert_ch;
753
754 buf=(unsigned char *)s->init_buf->data;
755
756 /* We have a cert associated with the SSL, so attach it to
757 * the session if it does not have one */
758
759 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_A)
760 {
761 i=ssl2_read(s,(char *)&(buf[s->init_num]),
762 SSL2_MAX_CERT_CHALLENGE_LENGTH+2-s->init_num);
763 if (i<(SSL2_MIN_CERT_CHALLENGE_LENGTH+2-s->init_num))
764 return(ssl2_part_read(s,SSL_F_CLIENT_CERTIFICATE,i));
765 s->init_num += i;
766 if (s->msg_callback)
767 s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, s->msg_callback_arg); /* REQUEST-CERTIFICATE */
768
769 /* type=buf[0]; */
770 /* type eq x509 */
771 if (buf[1] != SSL2_AT_MD5_WITH_RSA_ENCRYPTION)
772 {
773 ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE);
774 SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_AUTHENTICATION_TYPE);
775 return(-1);
776 }
777
778 if ((s->cert == NULL) ||
779 (s->cert->key->x509 == NULL) ||
780 (s->cert->key->privatekey == NULL))
781 {
782 s->state=SSL2_ST_X509_GET_CLIENT_CERTIFICATE;
783 }
784 else
785 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C;
786 }
787
788 cert_ch = buf + 2;
789 cert_ch_len = s->init_num - 2;
790
791 if (s->state == SSL2_ST_X509_GET_CLIENT_CERTIFICATE)
792 {
793 X509 *x509=NULL;
794 EVP_PKEY *pkey=NULL;
795
796 /* If we get an error we need to
797 * ssl->rwstate=SSL_X509_LOOKUP;
798 * return(error);
799 * We should then be retried when things are ok and we
800 * can get a cert or not */
801
802 i=0;
803 if (s->ctx->client_cert_cb != NULL)
804 {
805 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
806 }
807
808 if (i < 0)
809 {
810 s->rwstate=SSL_X509_LOOKUP;
811 return(-1);
812 }
813 s->rwstate=SSL_NOTHING;
814
815 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
816 {
817 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C;
818 if ( !SSL_use_certificate(s,x509) ||
819 !SSL_use_PrivateKey(s,pkey))
820 {
821 i=0;
822 }
823 X509_free(x509);
824 EVP_PKEY_free(pkey);
825 }
826 else if (i == 1)
827 {
828 if (x509 != NULL) X509_free(x509);
829 if (pkey != NULL) EVP_PKEY_free(pkey);
830 SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
831 i=0;
832 }
833
834 if (i == 0)
835 {
836 /* We have no client certificate to respond with
837 * so send the correct error message back */
838 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_B;
839 p=buf;
840 *(p++)=SSL2_MT_ERROR;
841 s2n(SSL2_PE_NO_CERTIFICATE,p);
842 s->init_off=0;
843 s->init_num=3;
844 /* Write is done at the end */
845 }
846 }
847
848 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_B)
849 {
850 return(ssl2_do_write(s));
851 }
852
853 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_C)
854 {
855 EVP_MD_CTX ctx;
856
857 /* ok, now we calculate the checksum
858 * do it first so we can reuse buf :-) */
859 p=buf;
860 EVP_MD_CTX_init(&ctx);
861 EVP_SignInit_ex(&ctx,s->ctx->rsa_md5, NULL);
862 EVP_SignUpdate(&ctx,s->s2->key_material,
863 s->s2->key_material_length);
864 EVP_SignUpdate(&ctx,cert_ch,(unsigned int)cert_ch_len);
865 n=i2d_X509(s->session->sess_cert->peer_key->x509,&p);
866 EVP_SignUpdate(&ctx,buf,(unsigned int)n);
867
868 p=buf;
869 d=p+6;
870 *(p++)=SSL2_MT_CLIENT_CERTIFICATE;
871 *(p++)=SSL2_CT_X509_CERTIFICATE;
872 n=i2d_X509(s->cert->key->x509,&d);
873 s2n(n,p);
874
875 if (!EVP_SignFinal(&ctx,d,&n,s->cert->key->privatekey))
876 {
877 /* this is not good. If things have failed it
878 * means there so something wrong with the key.
879 * We will continue with a 0 length signature
880 */
881 }
882 EVP_MD_CTX_cleanup(&ctx);
883 s2n(n,p);
884 d+=n;
885
886 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_D;
887 s->init_num=d-buf;
888 s->init_off=0;
889 }
890 /* if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_D) */
891 return(ssl2_do_write(s));
892 }
893
894 static int get_server_verify(SSL *s)
895 {
896 unsigned char *p;
897 int i, n, len;
898
899 p=(unsigned char *)s->init_buf->data;
900 if (s->state == SSL2_ST_GET_SERVER_VERIFY_A)
901 {
902 i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num);
903 if (i < (1-s->init_num))
904 return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i));
905 s->init_num += i;
906
907 s->state= SSL2_ST_GET_SERVER_VERIFY_B;
908 if (*p != SSL2_MT_SERVER_VERIFY)
909 {
910 if (p[0] != SSL2_MT_ERROR)
911 {
912 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
913 SSLerr(SSL_F_GET_SERVER_VERIFY,
914 SSL_R_READ_WRONG_PACKET_TYPE);
915 }
916 else
917 {
918 SSLerr(SSL_F_GET_SERVER_VERIFY,SSL_R_PEER_ERROR);
919 /* try to read the error message */
920 i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num);
921 return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i);
922 }
923 return(-1);
924 }
925 }
926
927 p=(unsigned char *)s->init_buf->data;
928 len = 1 + s->s2->challenge_length;
929 n = len - s->init_num;
930 i = ssl2_read(s,(char *)&(p[s->init_num]),n);
931 if (i < n)
932 return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i));
933 if (s->msg_callback)
934 s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* SERVER-VERIFY */
935 p += 1;
936
937 if (memcmp(p,s->s2->challenge,s->s2->challenge_length) != 0)
938 {
939 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
940 SSLerr(SSL_F_GET_SERVER_VERIFY,SSL_R_CHALLENGE_IS_DIFFERENT);
941 return(-1);
942 }
943 return(1);
944 }
945
946 static int get_server_finished(SSL *s)
947 {
948 unsigned char *buf;
949 unsigned char *p;
950 int i, n, len;
951
952 buf=(unsigned char *)s->init_buf->data;
953 p=buf;
954 if (s->state == SSL2_ST_GET_SERVER_FINISHED_A)
955 {
956 i=ssl2_read(s,(char *)&(buf[s->init_num]),1-s->init_num);
957 if (i < (1-s->init_num))
958 return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i));
959 s->init_num += i;
960
961 if (*p == SSL2_MT_REQUEST_CERTIFICATE)
962 {
963 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_A;
964 return(1);
965 }
966 else if (*p != SSL2_MT_SERVER_FINISHED)
967 {
968 if (p[0] != SSL2_MT_ERROR)
969 {
970 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
971 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE);
972 }
973 else
974 {
975 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_PEER_ERROR);
976 /* try to read the error message */
977 i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num);
978 return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i);
979 }
980 return(-1);
981 }
982 s->state=SSL2_ST_GET_SERVER_FINISHED_B;
983 }
984
985 len = 1 + SSL2_SSL_SESSION_ID_LENGTH;
986 n = len - s->init_num;
987 i = ssl2_read(s,(char *)&(buf[s->init_num]), n);
988 if (i < n) /* XXX could be shorter than SSL2_SSL_SESSION_ID_LENGTH, that's the maximum */
989 return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i));
990 s->init_num += i;
991 if (s->msg_callback)
992 s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, s->msg_callback_arg); /* SERVER-FINISHED */
993
994 if (!s->hit) /* new session */
995 {
996 /* new session-id */
997 /* Make sure we were not trying to re-use an old SSL_SESSION
998 * or bad things can happen */
999 /* ZZZZZZZZZZZZZ */
1000 s->session->session_id_length=SSL2_SSL_SESSION_ID_LENGTH;
1001 memcpy(s->session->session_id,p+1,SSL2_SSL_SESSION_ID_LENGTH);
1002 }
1003 else
1004 {
1005 if (!(s->options & SSL_OP_MICROSOFT_SESS_ID_BUG))
1006 {
1007 if ((s->session->session_id_length > sizeof s->session->session_id)
1008 || (0 != memcmp(buf + 1, s->session->session_id,
1009 (unsigned int)s->session->session_id_length)))
1010 {
1011 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
1012 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_SSL_SESSION_ID_IS_DIFFERENT);
1013 return(-1);
1014 }
1015 }
1016 }
1017 s->state = SSL_ST_OK;
1018 return(1);
1019 }
1020
1021 /* loads in the certificate from the server */
1022 int ssl2_set_certificate(SSL *s, int type, int len, const unsigned char *data)
1023 {
1024 STACK_OF(X509) *sk=NULL;
1025 EVP_PKEY *pkey=NULL;
1026 SESS_CERT *sc=NULL;
1027 int i;
1028 X509 *x509=NULL;
1029 int ret=0;
1030
1031 x509=d2i_X509(NULL,&data,(long)len);
1032 if (x509 == NULL)
1033 {
1034 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_X509_LIB);
1035 goto err;
1036 }
1037
1038 if ((sk=sk_X509_new_null()) == NULL || !sk_X509_push(sk,x509))
1039 {
1040 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1041 goto err;
1042 }
1043
1044 i=ssl_verify_cert_chain(s,sk);
1045
1046 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i))
1047 {
1048 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1049 goto err;
1050 }
1051 ERR_clear_error(); /* but we keep s->verify_result */
1052 s->session->verify_result = s->verify_result;
1053
1054 /* server's cert for this session */
1055 sc=ssl_sess_cert_new();
1056 if (sc == NULL)
1057 {
1058 ret= -1;
1059 goto err;
1060 }
1061 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1062 s->session->sess_cert=sc;
1063
1064 sc->peer_pkeys[SSL_PKEY_RSA_ENC].x509=x509;
1065 sc->peer_key= &(sc->peer_pkeys[SSL_PKEY_RSA_ENC]);
1066
1067 pkey=X509_get_pubkey(x509);
1068 x509=NULL;
1069 if (pkey == NULL)
1070 {
1071 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_UNABLE_TO_EXTRACT_PUBLIC_KEY);
1072 goto err;
1073 }
1074 if (pkey->type != EVP_PKEY_RSA)
1075 {
1076 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_PUBLIC_KEY_NOT_RSA);
1077 goto err;
1078 }
1079
1080 if (!ssl_set_peer_cert_type(sc,SSL2_CT_X509_CERTIFICATE))
1081 goto err;
1082 ret=1;
1083 err:
1084 sk_X509_free(sk);
1085 X509_free(x509);
1086 EVP_PKEY_free(pkey);
1087 return(ret);
1088 }
1089
1090 static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from,
1091 unsigned char *to, int padding)
1092 {
1093 EVP_PKEY *pkey=NULL;
1094 int i= -1;
1095
1096 if ((sc == NULL) || (sc->peer_key->x509 == NULL) ||
1097 ((pkey=X509_get_pubkey(sc->peer_key->x509)) == NULL))
1098 {
1099 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_NO_PUBLICKEY);
1100 return(-1);
1101 }
1102 if (pkey->type != EVP_PKEY_RSA)
1103 {
1104 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA);
1105 goto end;
1106 }
1107
1108 /* we have the public key */
1109 i=RSA_public_encrypt(len,from,to,pkey->pkey.rsa,padding);
1110 if (i < 0)
1111 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,ERR_R_RSA_LIB);
1112 end:
1113 EVP_PKEY_free(pkey);
1114 return(i);
1115 }
1116 #else /* !OPENSSL_NO_SSL2 */
1117
1118 # if PEDANTIC
1119 static void *dummy=&dummy;
1120 # endif
1121
1122 #endif
DragonFly BSD