]> git.ipfire.org Git - thirdparty/openssl.git/blob - ssl/s2_clnt.c
projects / thirdparty / openssl.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Updatde from stable branch.
[thirdparty/openssl.git] / ssl / s2_clnt.c
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 const 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 const 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 (void)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 (void)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->sess_cert == NULL
524 || s->session->peer != s->session->sess_cert->peer_key->x509)
525 /* can't happen */
526 {
527 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
528 SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
529 return(-1);
530 }
531
532 s->s2->conn_id_length=s->s2->tmp.conn_id_length;
533 if (s->s2->conn_id_length > sizeof s->s2->conn_id)
534 {
535 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
536 SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_SSL2_CONNECTION_ID_TOO_LONG);
537 return -1;
538 }
539 memcpy(s->s2->conn_id,p,s->s2->tmp.conn_id_length);
540 return(1);
541 }
542
543 static int client_hello(SSL *s)
544 {
545 unsigned char *buf;
546 unsigned char *p,*d;
547 /* CIPHER **cipher;*/
548 int i,n,j;
549
550 buf=(unsigned char *)s->init_buf->data;
551 if (s->state == SSL2_ST_SEND_CLIENT_HELLO_A)
552 {
553 if ((s->session == NULL) ||
554 (s->session->ssl_version != s->version))
555 {
556 if (!ssl_get_new_session(s,0))
557 {
558 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
559 return(-1);
560 }
561 }
562 /* else use the pre-loaded session */
563
564 p=buf; /* header */
565 d=p+9; /* data section */
566 *(p++)=SSL2_MT_CLIENT_HELLO; /* type */
567 s2n(SSL2_VERSION,p); /* version */
568 n=j=0;
569
570 n=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),d,0);
571 d+=n;
572
573 if (n == 0)
574 {
575 SSLerr(SSL_F_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
576 return(-1);
577 }
578
579 s2n(n,p); /* cipher spec num bytes */
580
581 if ((s->session->session_id_length > 0) &&
582 (s->session->session_id_length <=
583 SSL2_MAX_SSL_SESSION_ID_LENGTH))
584 {
585 i=s->session->session_id_length;
586 s2n(i,p); /* session id length */
587 memcpy(d,s->session->session_id,(unsigned int)i);
588 d+=i;
589 }
590 else
591 {
592 s2n(0,p);
593 }
594
595 s->s2->challenge_length=SSL2_CHALLENGE_LENGTH;
596 s2n(SSL2_CHALLENGE_LENGTH,p); /* challenge length */
597 /*challenge id data*/
598 if (RAND_pseudo_bytes(s->s2->challenge,SSL2_CHALLENGE_LENGTH) <= 0)
599 return -1;
600 memcpy(d,s->s2->challenge,SSL2_CHALLENGE_LENGTH);
601 d+=SSL2_CHALLENGE_LENGTH;
602
603 s->state=SSL2_ST_SEND_CLIENT_HELLO_B;
604 s->init_num=d-buf;
605 s->init_off=0;
606 }
607 /* SSL2_ST_SEND_CLIENT_HELLO_B */
608 return(ssl2_do_write(s));
609 }
610
611 static int client_master_key(SSL *s)
612 {
613 unsigned char *buf;
614 unsigned char *p,*d;
615 int clear,enc,karg,i;
616 SSL_SESSION *sess;
617 const EVP_CIPHER *c;
618 const EVP_MD *md;
619
620 buf=(unsigned char *)s->init_buf->data;
621 if (s->state == SSL2_ST_SEND_CLIENT_MASTER_KEY_A)
622 {
623
624 if (!ssl_cipher_get_evp(s->session,&c,&md,NULL,NULL,NULL))
625 {
626 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
627 SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS);
628 return(-1);
629 }
630 sess=s->session;
631 p=buf;
632 d=p+10;
633 *(p++)=SSL2_MT_CLIENT_MASTER_KEY;/* type */
634
635 i=ssl_put_cipher_by_char(s,sess->cipher,p);
636 p+=i;
637
638 /* make key_arg data */
639 i=EVP_CIPHER_iv_length(c);
640 sess->key_arg_length=i;
641 if (i > SSL_MAX_KEY_ARG_LENGTH)
642 {
643 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
644 SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
645 return -1;
646 }
647 if (i > 0)
648 if (RAND_pseudo_bytes(sess->key_arg,i) <= 0)
649 return -1;
650
651 /* make a master key */
652 i=EVP_CIPHER_key_length(c);
653 sess->master_key_length=i;
654 if (i > 0)
655 {
656 if (i > (int)sizeof(sess->master_key))
657 {
658 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
659 SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
660 return -1;
661 }
662 if (RAND_bytes(sess->master_key,i) <= 0)
663 {
664 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
665 return(-1);
666 }
667 }
668
669 if (sess->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC)
670 enc=8;
671 else if (SSL_C_IS_EXPORT(sess->cipher))
672 enc=5;
673 else
674 enc=i;
675
676 if ((int)i < enc)
677 {
678 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
679 SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_CIPHER_TABLE_SRC_ERROR);
680 return(-1);
681 }
682 clear=i-enc;
683 s2n(clear,p);
684 memcpy(d,sess->master_key,(unsigned int)clear);
685 d+=clear;
686
687 enc=ssl_rsa_public_encrypt(sess->sess_cert,enc,
688 &(sess->master_key[clear]),d,
689 (s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING);
690 if (enc <= 0)
691 {
692 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
693 SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PUBLIC_KEY_ENCRYPT_ERROR);
694 return(-1);
695 }
696 #ifdef PKCS1_CHECK
697 if (s->options & SSL_OP_PKCS1_CHECK_1) d[1]++;
698 if (s->options & SSL_OP_PKCS1_CHECK_2)
699 sess->master_key[clear]++;
700 #endif
701 s2n(enc,p);
702 d+=enc;
703 karg=sess->key_arg_length;
704 s2n(karg,p); /* key arg size */
705 if (karg > (int)sizeof(sess->key_arg))
706 {
707 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
708 SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
709 return -1;
710 }
711 memcpy(d,sess->key_arg,(unsigned int)karg);
712 d+=karg;
713
714 s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_B;
715 s->init_num=d-buf;
716 s->init_off=0;
717 }
718
719 /* SSL2_ST_SEND_CLIENT_MASTER_KEY_B */
720 return(ssl2_do_write(s));
721 }
722
723 static int client_finished(SSL *s)
724 {
725 unsigned char *p;
726
727 if (s->state == SSL2_ST_SEND_CLIENT_FINISHED_A)
728 {
729 p=(unsigned char *)s->init_buf->data;
730 *(p++)=SSL2_MT_CLIENT_FINISHED;
731 if (s->s2->conn_id_length > sizeof s->s2->conn_id)
732 {
733 SSLerr(SSL_F_CLIENT_FINISHED, ERR_R_INTERNAL_ERROR);
734 return -1;
735 }
736 memcpy(p,s->s2->conn_id,(unsigned int)s->s2->conn_id_length);
737
738 s->state=SSL2_ST_SEND_CLIENT_FINISHED_B;
739 s->init_num=s->s2->conn_id_length+1;
740 s->init_off=0;
741 }
742 return(ssl2_do_write(s));
743 }
744
745 /* read the data and then respond */
746 static int client_certificate(SSL *s)
747 {
748 unsigned char *buf;
749 unsigned char *p,*d;
750 int i;
751 unsigned int n;
752 int cert_ch_len;
753 unsigned char *cert_ch;
754
755 buf=(unsigned char *)s->init_buf->data;
756
757 /* We have a cert associated with the SSL, so attach it to
758 * the session if it does not have one */
759
760 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_A)
761 {
762 i=ssl2_read(s,(char *)&(buf[s->init_num]),
763 SSL2_MAX_CERT_CHALLENGE_LENGTH+2-s->init_num);
764 if (i<(SSL2_MIN_CERT_CHALLENGE_LENGTH+2-s->init_num))
765 return(ssl2_part_read(s,SSL_F_CLIENT_CERTIFICATE,i));
766 s->init_num += i;
767 if (s->msg_callback)
768 s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, s->msg_callback_arg); /* REQUEST-CERTIFICATE */
769
770 /* type=buf[0]; */
771 /* type eq x509 */
772 if (buf[1] != SSL2_AT_MD5_WITH_RSA_ENCRYPTION)
773 {
774 ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE);
775 SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_AUTHENTICATION_TYPE);
776 return(-1);
777 }
778
779 if ((s->cert == NULL) ||
780 (s->cert->key->x509 == NULL) ||
781 (s->cert->key->privatekey == NULL))
782 {
783 s->state=SSL2_ST_X509_GET_CLIENT_CERTIFICATE;
784 }
785 else
786 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C;
787 }
788
789 cert_ch = buf + 2;
790 cert_ch_len = s->init_num - 2;
791
792 if (s->state == SSL2_ST_X509_GET_CLIENT_CERTIFICATE)
793 {
794 X509 *x509=NULL;
795 EVP_PKEY *pkey=NULL;
796
797 /* If we get an error we need to
798 * ssl->rwstate=SSL_X509_LOOKUP;
799 * return(error);
800 * We should then be retried when things are ok and we
801 * can get a cert or not */
802
803 i=0;
804 if (s->ctx->client_cert_cb != NULL)
805 {
806 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
807 }
808
809 if (i < 0)
810 {
811 s->rwstate=SSL_X509_LOOKUP;
812 return(-1);
813 }
814 s->rwstate=SSL_NOTHING;
815
816 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
817 {
818 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C;
819 if ( !SSL_use_certificate(s,x509) ||
820 !SSL_use_PrivateKey(s,pkey))
821 {
822 i=0;
823 }
824 X509_free(x509);
825 EVP_PKEY_free(pkey);
826 }
827 else if (i == 1)
828 {
829 if (x509 != NULL) X509_free(x509);
830 if (pkey != NULL) EVP_PKEY_free(pkey);
831 SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
832 i=0;
833 }
834
835 if (i == 0)
836 {
837 /* We have no client certificate to respond with
838 * so send the correct error message back */
839 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_B;
840 p=buf;
841 *(p++)=SSL2_MT_ERROR;
842 s2n(SSL2_PE_NO_CERTIFICATE,p);
843 s->init_off=0;
844 s->init_num=3;
845 /* Write is done at the end */
846 }
847 }
848
849 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_B)
850 {
851 return(ssl2_do_write(s));
852 }
853
854 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_C)
855 {
856 EVP_MD_CTX ctx;
857
858 /* ok, now we calculate the checksum
859 * do it first so we can reuse buf :-) */
860 p=buf;
861 EVP_MD_CTX_init(&ctx);
862 EVP_SignInit_ex(&ctx,s->ctx->rsa_md5, NULL);
863 EVP_SignUpdate(&ctx,s->s2->key_material,
864 s->s2->key_material_length);
865 EVP_SignUpdate(&ctx,cert_ch,(unsigned int)cert_ch_len);
866 i=i2d_X509(s->session->sess_cert->peer_key->x509,&p);
867 /* Don't update the signature if it fails - FIXME: probably should handle this better */
868 if(i > 0)
869 EVP_SignUpdate(&ctx,buf,(unsigned int)i);
870
871 p=buf;
872 d=p+6;
873 *(p++)=SSL2_MT_CLIENT_CERTIFICATE;
874 *(p++)=SSL2_CT_X509_CERTIFICATE;
875 n=i2d_X509(s->cert->key->x509,&d);
876 s2n(n,p);
877
878 if (!EVP_SignFinal(&ctx,d,&n,s->cert->key->privatekey))
879 {
880 /* this is not good. If things have failed it
881 * means there so something wrong with the key.
882 * We will continue with a 0 length signature
883 */
884 }
885 EVP_MD_CTX_cleanup(&ctx);
886 s2n(n,p);
887 d+=n;
888
889 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_D;
890 s->init_num=d-buf;
891 s->init_off=0;
892 }
893 /* if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_D) */
894 return(ssl2_do_write(s));
895 }
896
897 static int get_server_verify(SSL *s)
898 {
899 unsigned char *p;
900 int i, n, len;
901
902 p=(unsigned char *)s->init_buf->data;
903 if (s->state == SSL2_ST_GET_SERVER_VERIFY_A)
904 {
905 i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num);
906 if (i < (1-s->init_num))
907 return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i));
908 s->init_num += i;
909
910 s->state= SSL2_ST_GET_SERVER_VERIFY_B;
911 if (*p != SSL2_MT_SERVER_VERIFY)
912 {
913 if (p[0] != SSL2_MT_ERROR)
914 {
915 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
916 SSLerr(SSL_F_GET_SERVER_VERIFY,
917 SSL_R_READ_WRONG_PACKET_TYPE);
918 }
919 else
920 {
921 SSLerr(SSL_F_GET_SERVER_VERIFY,SSL_R_PEER_ERROR);
922 /* try to read the error message */
923 i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num);
924 return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i);
925 }
926 return(-1);
927 }
928 }
929
930 p=(unsigned char *)s->init_buf->data;
931 len = 1 + s->s2->challenge_length;
932 n = len - s->init_num;
933 i = ssl2_read(s,(char *)&(p[s->init_num]),n);
934 if (i < n)
935 return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i));
936 if (s->msg_callback)
937 s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* SERVER-VERIFY */
938 p += 1;
939
940 if (memcmp(p,s->s2->challenge,s->s2->challenge_length) != 0)
941 {
942 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
943 SSLerr(SSL_F_GET_SERVER_VERIFY,SSL_R_CHALLENGE_IS_DIFFERENT);
944 return(-1);
945 }
946 return(1);
947 }
948
949 static int get_server_finished(SSL *s)
950 {
951 unsigned char *buf;
952 unsigned char *p;
953 int i, n, len;
954
955 buf=(unsigned char *)s->init_buf->data;
956 p=buf;
957 if (s->state == SSL2_ST_GET_SERVER_FINISHED_A)
958 {
959 i=ssl2_read(s,(char *)&(buf[s->init_num]),1-s->init_num);
960 if (i < (1-s->init_num))
961 return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i));
962 s->init_num += i;
963
964 if (*p == SSL2_MT_REQUEST_CERTIFICATE)
965 {
966 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_A;
967 return(1);
968 }
969 else if (*p != SSL2_MT_SERVER_FINISHED)
970 {
971 if (p[0] != SSL2_MT_ERROR)
972 {
973 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
974 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE);
975 }
976 else
977 {
978 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_PEER_ERROR);
979 /* try to read the error message */
980 i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num);
981 return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i);
982 }
983 return(-1);
984 }
985 s->state=SSL2_ST_GET_SERVER_FINISHED_B;
986 }
987
988 len = 1 + SSL2_SSL_SESSION_ID_LENGTH;
989 n = len - s->init_num;
990 i = ssl2_read(s,(char *)&(buf[s->init_num]), n);
991 if (i < n) /* XXX could be shorter than SSL2_SSL_SESSION_ID_LENGTH, that's the maximum */
992 return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i));
993 s->init_num += i;
994 if (s->msg_callback)
995 s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, s->msg_callback_arg); /* SERVER-FINISHED */
996
997 if (!s->hit) /* new session */
998 {
999 /* new session-id */
1000 /* Make sure we were not trying to re-use an old SSL_SESSION
1001 * or bad things can happen */
1002 /* ZZZZZZZZZZZZZ */
1003 s->session->session_id_length=SSL2_SSL_SESSION_ID_LENGTH;
1004 memcpy(s->session->session_id,p+1,SSL2_SSL_SESSION_ID_LENGTH);
1005 }
1006 else
1007 {
1008 if (!(s->options & SSL_OP_MICROSOFT_SESS_ID_BUG))
1009 {
1010 if ((s->session->session_id_length > sizeof s->session->session_id)
1011 || (0 != memcmp(buf + 1, s->session->session_id,
1012 (unsigned int)s->session->session_id_length)))
1013 {
1014 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
1015 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_SSL_SESSION_ID_IS_DIFFERENT);
1016 return(-1);
1017 }
1018 }
1019 }
1020 s->state = SSL_ST_OK;
1021 return(1);
1022 }
1023
1024 /* loads in the certificate from the server */
1025 int ssl2_set_certificate(SSL *s, int type, int len, const unsigned char *data)
1026 {
1027 STACK_OF(X509) *sk=NULL;
1028 EVP_PKEY *pkey=NULL;
1029 SESS_CERT *sc=NULL;
1030 int i;
1031 X509 *x509=NULL;
1032 int ret=0;
1033
1034 x509=d2i_X509(NULL,&data,(long)len);
1035 if (x509 == NULL)
1036 {
1037 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_X509_LIB);
1038 goto err;
1039 }
1040
1041 if ((sk=sk_X509_new_null()) == NULL || !sk_X509_push(sk,x509))
1042 {
1043 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1044 goto err;
1045 }
1046
1047 i=ssl_verify_cert_chain(s,sk);
1048
1049 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0))
1050 {
1051 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1052 goto err;
1053 }
1054 ERR_clear_error(); /* but we keep s->verify_result */
1055 s->session->verify_result = s->verify_result;
1056
1057 /* server's cert for this session */
1058 sc=ssl_sess_cert_new();
1059 if (sc == NULL)
1060 {
1061 ret= -1;
1062 goto err;
1063 }
1064 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1065 s->session->sess_cert=sc;
1066
1067 sc->peer_pkeys[SSL_PKEY_RSA_ENC].x509=x509;
1068 sc->peer_key= &(sc->peer_pkeys[SSL_PKEY_RSA_ENC]);
1069
1070 pkey=X509_get_pubkey(x509);
1071 x509=NULL;
1072 if (pkey == NULL)
1073 {
1074 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_UNABLE_TO_EXTRACT_PUBLIC_KEY);
1075 goto err;
1076 }
1077 if (pkey->type != EVP_PKEY_RSA)
1078 {
1079 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_PUBLIC_KEY_NOT_RSA);
1080 goto err;
1081 }
1082
1083 if (!ssl_set_peer_cert_type(sc,SSL2_CT_X509_CERTIFICATE))
1084 goto err;
1085 ret=1;
1086 err:
1087 sk_X509_free(sk);
1088 X509_free(x509);
1089 EVP_PKEY_free(pkey);
1090 return(ret);
1091 }
1092
1093 static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from,
1094 unsigned char *to, int padding)
1095 {
1096 EVP_PKEY *pkey=NULL;
1097 int i= -1;
1098
1099 if ((sc == NULL) || (sc->peer_key->x509 == NULL) ||
1100 ((pkey=X509_get_pubkey(sc->peer_key->x509)) == NULL))
1101 {
1102 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_NO_PUBLICKEY);
1103 return(-1);
1104 }
1105 if (pkey->type != EVP_PKEY_RSA)
1106 {
1107 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA);
1108 goto end;
1109 }
1110
1111 /* we have the public key */
1112 i=RSA_public_encrypt(len,from,to,pkey->pkey.rsa,padding);
1113 if (i < 0)
1114 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,ERR_R_RSA_LIB);
1115 end:
1116 EVP_PKEY_free(pkey);
1117 return(i);
1118 }
1119 #else /* !OPENSSL_NO_SSL2 */
1120
1121 # if PEDANTIC
1122 static void *dummy=&dummy;
1123 # endif
1124
1125 #endif
A mirror of the official openssl repository