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Import OpenSSL-0.9.8i.
[dragonfly.git] / crypto / openssl-0.9.7d / ssl / s2_clnt.c
blob43b32eb4159f1a3252bcea178a0deccc7544750a
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 SSL_METHOD *SSLv2_client_method(void)
141 {
142 static int init=1;
143 static SSL_METHOD SSLv2_client_data;
144
145 if (init)
146 {
147 CRYPTO_w_lock(CRYPTO_LOCK_SSL_METHOD);
148
149 if (init)
150 {
151 memcpy((char *)&SSLv2_client_data,(char *)sslv2_base_method(),
152 sizeof(SSL_METHOD));
153 SSLv2_client_data.ssl_connect=ssl2_connect;
154 SSLv2_client_data.get_ssl_method=ssl2_get_client_method;
155 init=0;
156 }
157
158 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_METHOD);
159 }
160 return(&SSLv2_client_data);
161 }
162
163 int ssl2_connect(SSL *s)
164 {
165 unsigned long l=time(NULL);
166 BUF_MEM *buf=NULL;
167 int ret= -1;
168 void (*cb)(const SSL *ssl,int type,int val)=NULL;
169 int new_state,state;
170
171 RAND_add(&l,sizeof(l),0);
172 ERR_clear_error();
173 clear_sys_error();
174
175 if (s->info_callback != NULL)
176 cb=s->info_callback;
177 else if (s->ctx->info_callback != NULL)
178 cb=s->ctx->info_callback;
179
180 /* init things to blank */
181 s->in_handshake++;
182 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
183
184 for (;;)
185 {
186 state=s->state;
187
188 switch (s->state)
189 {
190 case SSL_ST_BEFORE:
191 case SSL_ST_CONNECT:
192 case SSL_ST_BEFORE|SSL_ST_CONNECT:
193 case SSL_ST_OK|SSL_ST_CONNECT:
194
195 s->server=0;
196 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
197
198 s->version=SSL2_VERSION;
199 s->type=SSL_ST_CONNECT;
200
201 buf=s->init_buf;
202 if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL))
203 {
204 ret= -1;
205 goto end;
206 }
207 if (!BUF_MEM_grow(buf,
208 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
209 {
210 if (buf == s->init_buf)
211 buf=NULL;
212 ret= -1;
213 goto end;
214 }
215 s->init_buf=buf;
216 buf=NULL;
217 s->init_num=0;
218 s->state=SSL2_ST_SEND_CLIENT_HELLO_A;
219 s->ctx->stats.sess_connect++;
220 s->handshake_func=ssl2_connect;
221 BREAK;
222
223 case SSL2_ST_SEND_CLIENT_HELLO_A:
224 case SSL2_ST_SEND_CLIENT_HELLO_B:
225 s->shutdown=0;
226 ret=client_hello(s);
227 if (ret <= 0) goto end;
228 s->init_num=0;
229 s->state=SSL2_ST_GET_SERVER_HELLO_A;
230 BREAK;
231
232 case SSL2_ST_GET_SERVER_HELLO_A:
233 case SSL2_ST_GET_SERVER_HELLO_B:
234 ret=get_server_hello(s);
235 if (ret <= 0) goto end;
236 s->init_num=0;
237 if (!s->hit) /* new session */
238 {
239 s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_A;
240 BREAK;
241 }
242 else
243 {
244 s->state=SSL2_ST_CLIENT_START_ENCRYPTION;
245 break;
246 }
247
248 case SSL2_ST_SEND_CLIENT_MASTER_KEY_A:
249 case SSL2_ST_SEND_CLIENT_MASTER_KEY_B:
250 ret=client_master_key(s);
251 if (ret <= 0) goto end;
252 s->init_num=0;
253 s->state=SSL2_ST_CLIENT_START_ENCRYPTION;
254 break;
255
256 case SSL2_ST_CLIENT_START_ENCRYPTION:
257 /* Ok, we now have all the stuff needed to
258 * start encrypting, so lets fire it up :-) */
259 if (!ssl2_enc_init(s,1))
260 {
261 ret= -1;
262 goto end;
263 }
264 s->s2->clear_text=0;
265 s->state=SSL2_ST_SEND_CLIENT_FINISHED_A;
266 break;
267
268 case SSL2_ST_SEND_CLIENT_FINISHED_A:
269 case SSL2_ST_SEND_CLIENT_FINISHED_B:
270 ret=client_finished(s);
271 if (ret <= 0) goto end;
272 s->init_num=0;
273 s->state=SSL2_ST_GET_SERVER_VERIFY_A;
274 break;
275
276 case SSL2_ST_GET_SERVER_VERIFY_A:
277 case SSL2_ST_GET_SERVER_VERIFY_B:
278 ret=get_server_verify(s);
279 if (ret <= 0) goto end;
280 s->init_num=0;
281 s->state=SSL2_ST_GET_SERVER_FINISHED_A;
282 break;
283
284 case SSL2_ST_GET_SERVER_FINISHED_A:
285 case SSL2_ST_GET_SERVER_FINISHED_B:
286 ret=get_server_finished(s);
287 if (ret <= 0) goto end;
288 break;
289
290 case SSL2_ST_SEND_CLIENT_CERTIFICATE_A:
291 case SSL2_ST_SEND_CLIENT_CERTIFICATE_B:
292 case SSL2_ST_SEND_CLIENT_CERTIFICATE_C:
293 case SSL2_ST_SEND_CLIENT_CERTIFICATE_D:
294 case SSL2_ST_X509_GET_CLIENT_CERTIFICATE:
295 ret=client_certificate(s);
296 if (ret <= 0) goto end;
297 s->init_num=0;
298 s->state=SSL2_ST_GET_SERVER_FINISHED_A;
299 break;
300
301 case SSL_ST_OK:
302 if (s->init_buf != NULL)
303 {
304 BUF_MEM_free(s->init_buf);
305 s->init_buf=NULL;
306 }
307 s->init_num=0;
308 /* ERR_clear_error();*/
309
310 /* If we want to cache session-ids in the client
311 * and we successfully add the session-id to the
312 * cache, and there is a callback, then pass it out.
313 * 26/11/96 - eay - only add if not a re-used session.
314 */
315
316 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
317 if (s->hit) s->ctx->stats.sess_hit++;
318
319 ret=1;
320 /* s->server=0; */
321 s->ctx->stats.sess_connect_good++;
322
323 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
324
325 goto end;
326 /* break; */
327 default:
328 SSLerr(SSL_F_SSL2_CONNECT,SSL_R_UNKNOWN_STATE);
329 return(-1);
330 /* break; */
331 }
332
333 if ((cb != NULL) && (s->state != state))
334 {
335 new_state=s->state;
336 s->state=state;
337 cb(s,SSL_CB_CONNECT_LOOP,1);
338 s->state=new_state;
339 }
340 }
341 end:
342 s->in_handshake--;
343 if (buf != NULL)
344 BUF_MEM_free(buf);
345 if (cb != NULL)
346 cb(s,SSL_CB_CONNECT_EXIT,ret);
347 return(ret);
348 }
349
350 static int get_server_hello(SSL *s)
351 {
352 unsigned char *buf;
353 unsigned char *p;
354 int i,j;
355 unsigned long len;
356 STACK_OF(SSL_CIPHER) *sk=NULL,*cl, *prio, *allow;
357
358 buf=(unsigned char *)s->init_buf->data;
359 p=buf;
360 if (s->state == SSL2_ST_GET_SERVER_HELLO_A)
361 {
362 i=ssl2_read(s,(char *)&(buf[s->init_num]),11-s->init_num);
363 if (i < (11-s->init_num))
364 return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i));
365 s->init_num = 11;
366
367 if (*(p++) != SSL2_MT_SERVER_HELLO)
368 {
369 if (p[-1] != SSL2_MT_ERROR)
370 {
371 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
372 SSLerr(SSL_F_GET_SERVER_HELLO,
373 SSL_R_READ_WRONG_PACKET_TYPE);
374 }
375 else
376 SSLerr(SSL_F_GET_SERVER_HELLO,
377 SSL_R_PEER_ERROR);
378 return(-1);
379 }
380 #ifdef __APPLE_CC__
381 /* The Rhapsody 5.5 (a.k.a. MacOS X) compiler bug
382 * workaround. <appro@fy.chalmers.se> */
383 s->hit=(i=*(p++))?1:0;
384 #else
385 s->hit=(*(p++))?1:0;
386 #endif
387 s->s2->tmp.cert_type= *(p++);
388 n2s(p,i);
389 if (i < s->version) s->version=i;
390 n2s(p,i); s->s2->tmp.cert_length=i;
391 n2s(p,i); s->s2->tmp.csl=i;
392 n2s(p,i); s->s2->tmp.conn_id_length=i;
393 s->state=SSL2_ST_GET_SERVER_HELLO_B;
394 }
395
396 /* SSL2_ST_GET_SERVER_HELLO_B */
397 len = 11 + (unsigned long)s->s2->tmp.cert_length + (unsigned long)s->s2->tmp.csl + (unsigned long)s->s2->tmp.conn_id_length;
398 if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
399 {
400 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_MESSAGE_TOO_LONG);
401 return -1;
402 }
403 j = (int)len - s->init_num;
404 i = ssl2_read(s,(char *)&(buf[s->init_num]),j);
405 if (i != j) return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i));
406 if (s->msg_callback)
407 s->msg_callback(0, s->version, 0, buf, (size_t)len, s, s->msg_callback_arg); /* SERVER-HELLO */
408
409 /* things are looking good */
410
411 p = buf + 11;
412 if (s->hit)
413 {
414 if (s->s2->tmp.cert_length != 0)
415 {
416 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_LENGTH_NOT_ZERO);
417 return(-1);
418 }
419 if (s->s2->tmp.cert_type != 0)
420 {
421 if (!(s->options &
422 SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG))
423 {
424 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_TYPE_NOT_ZERO);
425 return(-1);
426 }
427 }
428 if (s->s2->tmp.csl != 0)
429 {
430 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CIPHER_LIST_NOT_ZERO);
431 return(-1);
432 }
433 }
434 else
435 {
436 #ifdef undef
437 /* very bad */
438 memset(s->session->session_id,0,
439 SSL_MAX_SSL_SESSION_ID_LENGTH_IN_BYTES);
440 s->session->session_id_length=0;
441 */
442 #endif
443
444 /* we need to do this in case we were trying to reuse a
445 * client session but others are already reusing it.
446 * If this was a new 'blank' session ID, the session-id
447 * length will still be 0 */
448 if (s->session->session_id_length > 0)
449 {
450 if (!ssl_get_new_session(s,0))
451 {
452 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
453 return(-1);
454 }
455 }
456
457 if (ssl2_set_certificate(s,s->s2->tmp.cert_type,
458 s->s2->tmp.cert_length,p) <= 0)
459 {
460 ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
461 return(-1);
462 }
463 p+=s->s2->tmp.cert_length;
464
465 if (s->s2->tmp.csl == 0)
466 {
467 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
468 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_LIST);
469 return(-1);
470 }
471
472 /* We have just received a list of ciphers back from the
473 * server. We need to get the ones that match, then select
474 * the one we want the most :-). */
475
476 /* load the ciphers */
477 sk=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.csl,
478 &s->session->ciphers);
479 p+=s->s2->tmp.csl;
480 if (sk == NULL)
481 {
482 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
483 SSLerr(SSL_F_GET_SERVER_HELLO,ERR_R_MALLOC_FAILURE);
484 return(-1);
485 }
486
487 sk_SSL_CIPHER_set_cmp_func(sk,ssl_cipher_ptr_id_cmp);
488
489 /* get the array of ciphers we will accept */
490 cl=SSL_get_ciphers(s);
491 sk_SSL_CIPHER_set_cmp_func(cl,ssl_cipher_ptr_id_cmp);
492
493 /*
494 * If server preference flag set, choose the first
495 * (highest priority) cipher the server sends, otherwise
496 * client preference has priority.
497 */
498 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
499 {
500 prio = sk;
501 allow = cl;
502 }
503 else
504 {
505 prio = cl;
506 allow = sk;
507 }
508 /* In theory we could have ciphers sent back that we
509 * don't want to use but that does not matter since we
510 * will check against the list we originally sent and
511 * for performance reasons we should not bother to match
512 * the two lists up just to check. */
513 for (i=0; i<sk_SSL_CIPHER_num(prio); i++)
514 {
515 if (sk_SSL_CIPHER_find(allow,
516 sk_SSL_CIPHER_value(prio,i)) >= 0)
517 break;
518 }
519
520 if (i >= sk_SSL_CIPHER_num(prio))
521 {
522 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
523 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_MATCH);
524 return(-1);
525 }
526 s->session->cipher=sk_SSL_CIPHER_value(prio,i);
527
528
529 if (s->session->peer != NULL) /* can't happen*/
530 {
531 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
532 SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
533 return(-1);
534 }
535
536 s->session->peer = s->session->sess_cert->peer_key->x509;
537 /* peer_key->x509 has been set by ssl2_set_certificate. */
538 CRYPTO_add(&s->session->peer->references, 1, CRYPTO_LOCK_X509);
539 }
540
541 if (s->session->peer != s->session->sess_cert->peer_key->x509)
542 /* can't happen */
543 {
544 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
545 SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
546 return(-1);
547 }
548
549 s->s2->conn_id_length=s->s2->tmp.conn_id_length;
550 if (s->s2->conn_id_length > sizeof s->s2->conn_id)
551 {
552 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
553 SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_SSL2_CONNECTION_ID_TOO_LONG);
554 return -1;
555 }
556 memcpy(s->s2->conn_id,p,s->s2->tmp.conn_id_length);
557 return(1);
558 }
559
560 static int client_hello(SSL *s)
561 {
562 unsigned char *buf;
563 unsigned char *p,*d;
564 /* CIPHER **cipher;*/
565 int i,n,j;
566
567 buf=(unsigned char *)s->init_buf->data;
568 if (s->state == SSL2_ST_SEND_CLIENT_HELLO_A)
569 {
570 if ((s->session == NULL) ||
571 (s->session->ssl_version != s->version))
572 {
573 if (!ssl_get_new_session(s,0))
574 {
575 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
576 return(-1);
577 }
578 }
579 /* else use the pre-loaded session */
580
581 p=buf; /* header */
582 d=p+9; /* data section */
583 *(p++)=SSL2_MT_CLIENT_HELLO; /* type */
584 s2n(SSL2_VERSION,p); /* version */
585 n=j=0;
586
587 n=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),d);
588 d+=n;
589
590 if (n == 0)
591 {
592 SSLerr(SSL_F_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
593 return(-1);
594 }
595
596 s2n(n,p); /* cipher spec num bytes */
597
598 if ((s->session->session_id_length > 0) &&
599 (s->session->session_id_length <=
600 SSL2_MAX_SSL_SESSION_ID_LENGTH))
601 {
602 i=s->session->session_id_length;
603 s2n(i,p); /* session id length */
604 memcpy(d,s->session->session_id,(unsigned int)i);
605 d+=i;
606 }
607 else
608 {
609 s2n(0,p);
610 }
611
612 s->s2->challenge_length=SSL2_CHALLENGE_LENGTH;
613 s2n(SSL2_CHALLENGE_LENGTH,p); /* challenge length */
614 /*challenge id data*/
615 RAND_pseudo_bytes(s->s2->challenge,SSL2_CHALLENGE_LENGTH);
616 memcpy(d,s->s2->challenge,SSL2_CHALLENGE_LENGTH);
617 d+=SSL2_CHALLENGE_LENGTH;
618
619 s->state=SSL2_ST_SEND_CLIENT_HELLO_B;
620 s->init_num=d-buf;
621 s->init_off=0;
622 }
623 /* SSL2_ST_SEND_CLIENT_HELLO_B */
624 return(ssl2_do_write(s));
625 }
626
627 static int client_master_key(SSL *s)
628 {
629 unsigned char *buf;
630 unsigned char *p,*d;
631 int clear,enc,karg,i;
632 SSL_SESSION *sess;
633 const EVP_CIPHER *c;
634 const EVP_MD *md;
635
636 buf=(unsigned char *)s->init_buf->data;
637 if (s->state == SSL2_ST_SEND_CLIENT_MASTER_KEY_A)
638 {
639
640 if (!ssl_cipher_get_evp(s->session,&c,&md,NULL))
641 {
642 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
643 SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS);
644 return(-1);
645 }
646 sess=s->session;
647 p=buf;
648 d=p+10;
649 *(p++)=SSL2_MT_CLIENT_MASTER_KEY;/* type */
650
651 i=ssl_put_cipher_by_char(s,sess->cipher,p);
652 p+=i;
653
654 /* make key_arg data */
655 i=EVP_CIPHER_iv_length(c);
656 sess->key_arg_length=i;
657 if (i > SSL_MAX_KEY_ARG_LENGTH)
658 {
659 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
660 SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
661 return -1;
662 }
663 if (i > 0) RAND_pseudo_bytes(sess->key_arg,i);
664
665 /* make a master key */
666 i=EVP_CIPHER_key_length(c);
667 sess->master_key_length=i;
668 if (i > 0)
669 {
670 if (i > sizeof sess->master_key)
671 {
672 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
673 SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
674 return -1;
675 }
676 if (RAND_bytes(sess->master_key,i) <= 0)
677 {
678 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
679 return(-1);
680 }
681 }
682
683 if (sess->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC)
684 enc=8;
685 else if (SSL_C_IS_EXPORT(sess->cipher))
686 enc=5;
687 else
688 enc=i;
689
690 if (i < enc)
691 {
692 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
693 SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_CIPHER_TABLE_SRC_ERROR);
694 return(-1);
695 }
696 clear=i-enc;
697 s2n(clear,p);
698 memcpy(d,sess->master_key,(unsigned int)clear);
699 d+=clear;
700
701 enc=ssl_rsa_public_encrypt(sess->sess_cert,enc,
702 &(sess->master_key[clear]),d,
703 (s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING);
704 if (enc <= 0)
705 {
706 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
707 SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PUBLIC_KEY_ENCRYPT_ERROR);
708 return(-1);
709 }
710 #ifdef PKCS1_CHECK
711 if (s->options & SSL_OP_PKCS1_CHECK_1) d[1]++;
712 if (s->options & SSL_OP_PKCS1_CHECK_2)
713 sess->master_key[clear]++;
714 #endif
715 s2n(enc,p);
716 d+=enc;
717 karg=sess->key_arg_length;
718 s2n(karg,p); /* key arg size */
719 if (karg > sizeof sess->key_arg)
720 {
721 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
722 SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
723 return -1;
724 }
725 memcpy(d,sess->key_arg,(unsigned int)karg);
726 d+=karg;
727
728 s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_B;
729 s->init_num=d-buf;
730 s->init_off=0;
731 }
732
733 /* SSL2_ST_SEND_CLIENT_MASTER_KEY_B */
734 return(ssl2_do_write(s));
735 }
736
737 static int client_finished(SSL *s)
738 {
739 unsigned char *p;
740
741 if (s->state == SSL2_ST_SEND_CLIENT_FINISHED_A)
742 {
743 p=(unsigned char *)s->init_buf->data;
744 *(p++)=SSL2_MT_CLIENT_FINISHED;
745 if (s->s2->conn_id_length > sizeof s->s2->conn_id)
746 {
747 SSLerr(SSL_F_CLIENT_FINISHED, ERR_R_INTERNAL_ERROR);
748 return -1;
749 }
750 memcpy(p,s->s2->conn_id,(unsigned int)s->s2->conn_id_length);
751
752 s->state=SSL2_ST_SEND_CLIENT_FINISHED_B;
753 s->init_num=s->s2->conn_id_length+1;
754 s->init_off=0;
755 }
756 return(ssl2_do_write(s));
757 }
758
759 /* read the data and then respond */
760 static int client_certificate(SSL *s)
761 {
762 unsigned char *buf;
763 unsigned char *p,*d;
764 int i;
765 unsigned int n;
766 int cert_ch_len;
767 unsigned char *cert_ch;
768
769 buf=(unsigned char *)s->init_buf->data;
770
771 /* We have a cert associated with the SSL, so attach it to
772 * the session if it does not have one */
773
774 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_A)
775 {
776 i=ssl2_read(s,(char *)&(buf[s->init_num]),
777 SSL2_MAX_CERT_CHALLENGE_LENGTH+2-s->init_num);
778 if (i<(SSL2_MIN_CERT_CHALLENGE_LENGTH+2-s->init_num))
779 return(ssl2_part_read(s,SSL_F_CLIENT_CERTIFICATE,i));
780 s->init_num += i;
781 if (s->msg_callback)
782 s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, s->msg_callback_arg); /* REQUEST-CERTIFICATE */
783
784 /* type=buf[0]; */
785 /* type eq x509 */
786 if (buf[1] != SSL2_AT_MD5_WITH_RSA_ENCRYPTION)
787 {
788 ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE);
789 SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_AUTHENTICATION_TYPE);
790 return(-1);
791 }
792
793 if ((s->cert == NULL) ||
794 (s->cert->key->x509 == NULL) ||
795 (s->cert->key->privatekey == NULL))
796 {
797 s->state=SSL2_ST_X509_GET_CLIENT_CERTIFICATE;
798 }
799 else
800 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C;
801 }
802
803 cert_ch = buf + 2;
804 cert_ch_len = s->init_num - 2;
805
806 if (s->state == SSL2_ST_X509_GET_CLIENT_CERTIFICATE)
807 {
808 X509 *x509=NULL;
809 EVP_PKEY *pkey=NULL;
810
811 /* If we get an error we need to
812 * ssl->rwstate=SSL_X509_LOOKUP;
813 * return(error);
814 * We should then be retried when things are ok and we
815 * can get a cert or not */
816
817 i=0;
818 if (s->ctx->client_cert_cb != NULL)
819 {
820 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
821 }
822
823 if (i < 0)
824 {
825 s->rwstate=SSL_X509_LOOKUP;
826 return(-1);
827 }
828 s->rwstate=SSL_NOTHING;
829
830 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
831 {
832 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C;
833 if ( !SSL_use_certificate(s,x509) ||
834 !SSL_use_PrivateKey(s,pkey))
835 {
836 i=0;
837 }
838 X509_free(x509);
839 EVP_PKEY_free(pkey);
840 }
841 else if (i == 1)
842 {
843 if (x509 != NULL) X509_free(x509);
844 if (pkey != NULL) EVP_PKEY_free(pkey);
845 SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
846 i=0;
847 }
848
849 if (i == 0)
850 {
851 /* We have no client certificate to respond with
852 * so send the correct error message back */
853 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_B;
854 p=buf;
855 *(p++)=SSL2_MT_ERROR;
856 s2n(SSL2_PE_NO_CERTIFICATE,p);
857 s->init_off=0;
858 s->init_num=3;
859 /* Write is done at the end */
860 }
861 }
862
863 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_B)
864 {
865 return(ssl2_do_write(s));
866 }
867
868 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_C)
869 {
870 EVP_MD_CTX ctx;
871
872 /* ok, now we calculate the checksum
873 * do it first so we can reuse buf :-) */
874 p=buf;
875 EVP_MD_CTX_init(&ctx);
876 EVP_SignInit_ex(&ctx,s->ctx->rsa_md5, NULL);
877 EVP_SignUpdate(&ctx,s->s2->key_material,
878 s->s2->key_material_length);
879 EVP_SignUpdate(&ctx,cert_ch,(unsigned int)cert_ch_len);
880 n=i2d_X509(s->session->sess_cert->peer_key->x509,&p);
881 EVP_SignUpdate(&ctx,buf,(unsigned int)n);
882
883 p=buf;
884 d=p+6;
885 *(p++)=SSL2_MT_CLIENT_CERTIFICATE;
886 *(p++)=SSL2_CT_X509_CERTIFICATE;
887 n=i2d_X509(s->cert->key->x509,&d);
888 s2n(n,p);
889
890 if (!EVP_SignFinal(&ctx,d,&n,s->cert->key->privatekey))
891 {
892 /* this is not good. If things have failed it
893 * means there so something wrong with the key.
894 * We will continue with a 0 length signature
895 */
896 }
897 EVP_MD_CTX_cleanup(&ctx);
898 s2n(n,p);
899 d+=n;
900
901 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_D;
902 s->init_num=d-buf;
903 s->init_off=0;
904 }
905 /* if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_D) */
906 return(ssl2_do_write(s));
907 }
908
909 static int get_server_verify(SSL *s)
910 {
911 unsigned char *p;
912 int i, n, len;
913
914 p=(unsigned char *)s->init_buf->data;
915 if (s->state == SSL2_ST_GET_SERVER_VERIFY_A)
916 {
917 i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num);
918 if (i < (1-s->init_num))
919 return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i));
920 s->init_num += i;
921
922 s->state= SSL2_ST_GET_SERVER_VERIFY_B;
923 if (*p != SSL2_MT_SERVER_VERIFY)
924 {
925 if (p[0] != SSL2_MT_ERROR)
926 {
927 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
928 SSLerr(SSL_F_GET_SERVER_VERIFY,
929 SSL_R_READ_WRONG_PACKET_TYPE);
930 }
931 else
932 {
933 SSLerr(SSL_F_GET_SERVER_VERIFY,SSL_R_PEER_ERROR);
934 /* try to read the error message */
935 i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num);
936 return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i);
937 }
938 return(-1);
939 }
940 }
941
942 p=(unsigned char *)s->init_buf->data;
943 len = 1 + s->s2->challenge_length;
944 n = len - s->init_num;
945 i = ssl2_read(s,(char *)&(p[s->init_num]),n);
946 if (i < n)
947 return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i));
948 if (s->msg_callback)
949 s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* SERVER-VERIFY */
950 p += 1;
951
952 if (memcmp(p,s->s2->challenge,s->s2->challenge_length) != 0)
953 {
954 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
955 SSLerr(SSL_F_GET_SERVER_VERIFY,SSL_R_CHALLENGE_IS_DIFFERENT);
956 return(-1);
957 }
958 return(1);
959 }
960
961 static int get_server_finished(SSL *s)
962 {
963 unsigned char *buf;
964 unsigned char *p;
965 int i, n, len;
966
967 buf=(unsigned char *)s->init_buf->data;
968 p=buf;
969 if (s->state == SSL2_ST_GET_SERVER_FINISHED_A)
970 {
971 i=ssl2_read(s,(char *)&(buf[s->init_num]),1-s->init_num);
972 if (i < (1-s->init_num))
973 return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i));
974 s->init_num += i;
975
976 if (*p == SSL2_MT_REQUEST_CERTIFICATE)
977 {
978 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_A;
979 return(1);
980 }
981 else if (*p != SSL2_MT_SERVER_FINISHED)
982 {
983 if (p[0] != SSL2_MT_ERROR)
984 {
985 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
986 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE);
987 }
988 else
989 {
990 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_PEER_ERROR);
991 /* try to read the error message */
992 i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num);
993 return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i);
994 }
995 return(-1);
996 }
997 s->state=SSL2_ST_GET_SERVER_FINISHED_B;
998 }
999
1000 len = 1 + SSL2_SSL_SESSION_ID_LENGTH;
1001 n = len - s->init_num;
1002 i = ssl2_read(s,(char *)&(buf[s->init_num]), n);
1003 if (i < n) /* XXX could be shorter than SSL2_SSL_SESSION_ID_LENGTH, that's the maximum */
1004 return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i));
1005 s->init_num += i;
1006 if (s->msg_callback)
1007 s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, s->msg_callback_arg); /* SERVER-FINISHED */
1008
1009 if (!s->hit) /* new session */
1010 {
1011 /* new session-id */
1012 /* Make sure we were not trying to re-use an old SSL_SESSION
1013 * or bad things can happen */
1014 /* ZZZZZZZZZZZZZ */
1015 s->session->session_id_length=SSL2_SSL_SESSION_ID_LENGTH;
1016 memcpy(s->session->session_id,p+1,SSL2_SSL_SESSION_ID_LENGTH);
1017 }
1018 else
1019 {
1020 if (!(s->options & SSL_OP_MICROSOFT_SESS_ID_BUG))
1021 {
1022 if ((s->session->session_id_length > sizeof s->session->session_id)
1023 || (0 != memcmp(buf + 1, s->session->session_id,
1024 (unsigned int)s->session->session_id_length)))
1025 {
1026 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
1027 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_SSL_SESSION_ID_IS_DIFFERENT);
1028 return(-1);
1029 }
1030 }
1031 }
1032 s->state = SSL_ST_OK;
1033 return(1);
1034 }
1035
1036 /* loads in the certificate from the server */
1037 int ssl2_set_certificate(SSL *s, int type, int len, unsigned char *data)
1038 {
1039 STACK_OF(X509) *sk=NULL;
1040 EVP_PKEY *pkey=NULL;
1041 SESS_CERT *sc=NULL;
1042 int i;
1043 X509 *x509=NULL;
1044 int ret=0;
1045
1046 x509=d2i_X509(NULL,&data,(long)len);
1047 if (x509 == NULL)
1048 {
1049 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_X509_LIB);
1050 goto err;
1051 }
1052
1053 if ((sk=sk_X509_new_null()) == NULL || !sk_X509_push(sk,x509))
1054 {
1055 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1056 goto err;
1057 }
1058
1059 i=ssl_verify_cert_chain(s,sk);
1060
1061 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i))
1062 {
1063 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1064 goto err;
1065 }
1066 ERR_clear_error(); /* but we keep s->verify_result */
1067 s->session->verify_result = s->verify_result;
1068
1069 /* server's cert for this session */
1070 sc=ssl_sess_cert_new();
1071 if (sc == NULL)
1072 {
1073 ret= -1;
1074 goto err;
1075 }
1076 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1077 s->session->sess_cert=sc;
1078
1079 sc->peer_pkeys[SSL_PKEY_RSA_ENC].x509=x509;
1080 sc->peer_key= &(sc->peer_pkeys[SSL_PKEY_RSA_ENC]);
1081
1082 pkey=X509_get_pubkey(x509);
1083 x509=NULL;
1084 if (pkey == NULL)
1085 {
1086 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_UNABLE_TO_EXTRACT_PUBLIC_KEY);
1087 goto err;
1088 }
1089 if (pkey->type != EVP_PKEY_RSA)
1090 {
1091 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_PUBLIC_KEY_NOT_RSA);
1092 goto err;
1093 }
1094
1095 if (!ssl_set_peer_cert_type(sc,SSL2_CT_X509_CERTIFICATE))
1096 goto err;
1097 ret=1;
1098 err:
1099 sk_X509_free(sk);
1100 X509_free(x509);
1101 EVP_PKEY_free(pkey);
1102 return(ret);
1103 }
1104
1105 static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from,
1106 unsigned char *to, int padding)
1107 {
1108 EVP_PKEY *pkey=NULL;
1109 int i= -1;
1110
1111 if ((sc == NULL) || (sc->peer_key->x509 == NULL) ||
1112 ((pkey=X509_get_pubkey(sc->peer_key->x509)) == NULL))
1113 {
1114 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_NO_PUBLICKEY);
1115 return(-1);
1116 }
1117 if (pkey->type != EVP_PKEY_RSA)
1118 {
1119 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA);
1120 goto end;
1121 }
1122
1123 /* we have the public key */
1124 i=RSA_public_encrypt(len,from,to,pkey->pkey.rsa,padding);
1125 if (i < 0)
1126 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,ERR_R_RSA_LIB);
1127 end:
1128 EVP_PKEY_free(pkey);
1129 return(i);
1130 }
1131 #else /* !OPENSSL_NO_SSL2 */
1132
1133 # if PEDANTIC
1134 static void *dummy=&dummy;
1135 # endif
1136
1137 #endif
DragonFly BSD