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Fix various stuff: that VC++ 5.0 chokes on:
[thirdparty/openssl.git] / ssl / s2_srvr.c
1 /* ssl/s2_srvr.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 #include <stdio.h>
60 #include "bio.h"
61 #include "rand.h"
62 #include "objects.h"
63 #include "ssl_locl.h"
64 #include "evp.h"
65
66 #ifndef NOPROTO
67 static SSL_METHOD *ssl2_get_server_method(int ver);
68 static int get_client_master_key(SSL *s);
69 static int get_client_hello(SSL *s);
70 static int server_hello(SSL *s);
71 static int get_client_finished(SSL *s);
72 static int server_verify(SSL *s);
73 static int server_finish(SSL *s);
74 static int request_certificate(SSL *s);
75 static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from,
76 unsigned char *to,int padding);
77 #else
78 static SSL_METHOD *ssl2_get_server_method();
79 static int get_client_master_key();
80 static int get_client_hello();
81 static int server_hello();
82 static int get_client_finished();
83 static int server_verify();
84 static int server_finish();
85 static int request_certificate();
86 static int ssl_rsa_private_decrypt();
87 #endif
88
89 #define BREAK break
90
91 static SSL_METHOD *ssl2_get_server_method(ver)
92 int ver;
93 {
94 if (ver == SSL2_VERSION)
95 return(SSLv2_server_method());
96 else
97 return(NULL);
98 }
99
100 SSL_METHOD *SSLv2_server_method()
101 {
102 static int init=1;
103 static SSL_METHOD SSLv2_server_data;
104
105 if (init)
106 {
107 init=0;
108 memcpy((char *)&SSLv2_server_data,(char *)sslv2_base_method(),
109 sizeof(SSL_METHOD));
110 SSLv2_server_data.ssl_accept=ssl2_accept;
111 SSLv2_server_data.get_ssl_method=ssl2_get_server_method;
112 }
113 return(&SSLv2_server_data);
114 }
115
116 int ssl2_accept(s)
117 SSL *s;
118 {
119 unsigned long l=time(NULL);
120 BUF_MEM *buf=NULL;
121 int ret= -1;
122 long num1;
123 void (*cb)()=NULL;
124 int new_state,state;
125
126 RAND_seed((unsigned char *)&l,sizeof(l));
127 ERR_clear_error();
128 clear_sys_error();
129
130 if (s->info_callback != NULL)
131 cb=s->info_callback;
132 else if (s->ctx->info_callback != NULL)
133 cb=s->ctx->info_callback;
134
135 /* init things to blank */
136 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
137 s->in_handshake++;
138
139 if (((s->session == NULL) || (s->session->cert == NULL)) &&
140 (s->cert == NULL))
141 {
142 SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
143 return(-1);
144 }
145
146 clear_sys_error();
147 for (;;)
148 {
149 state=s->state;
150
151 switch (s->state)
152 {
153 case SSL_ST_BEFORE:
154 case SSL_ST_ACCEPT:
155 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
156 case SSL_ST_OK|SSL_ST_ACCEPT:
157
158 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
159
160 s->version=SSL2_VERSION;
161 s->type=SSL_ST_ACCEPT;
162
163 buf=s->init_buf;
164 if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL))
165 { ret= -1; goto end; }
166 if (!BUF_MEM_grow(buf,(int)
167 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
168 { ret= -1; goto end; }
169 s->init_buf=buf;
170 s->init_num=0;
171 s->ctx->sess_accept++;
172 s->handshake_func=ssl2_accept;
173 s->state=SSL2_ST_GET_CLIENT_HELLO_A;
174 BREAK;
175
176 case SSL2_ST_GET_CLIENT_HELLO_A:
177 case SSL2_ST_GET_CLIENT_HELLO_B:
178 case SSL2_ST_GET_CLIENT_HELLO_C:
179 s->shutdown=0;
180 ret=get_client_hello(s);
181 if (ret <= 0) goto end;
182 s->init_num=0;
183 s->state=SSL2_ST_SEND_SERVER_HELLO_A;
184 BREAK;
185
186 case SSL2_ST_SEND_SERVER_HELLO_A:
187 case SSL2_ST_SEND_SERVER_HELLO_B:
188 ret=server_hello(s);
189 if (ret <= 0) goto end;
190 s->init_num=0;
191 if (!s->hit)
192 {
193 s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_A;
194 BREAK;
195 }
196 else
197 {
198 s->state=SSL2_ST_SERVER_START_ENCRYPTION;
199 BREAK;
200 }
201 case SSL2_ST_GET_CLIENT_MASTER_KEY_A:
202 case SSL2_ST_GET_CLIENT_MASTER_KEY_B:
203 ret=get_client_master_key(s);
204 if (ret <= 0) goto end;
205 s->init_num=0;
206 s->state=SSL2_ST_SERVER_START_ENCRYPTION;
207 BREAK;
208
209 case SSL2_ST_SERVER_START_ENCRYPTION:
210 /* Ok we how have sent all the stuff needed to
211 * start encrypting, the next packet back will
212 * be encrypted. */
213 if (!ssl2_enc_init(s,0))
214 { ret= -1; goto end; }
215 s->s2->clear_text=0;
216 s->state=SSL2_ST_SEND_SERVER_VERIFY_A;
217 BREAK;
218
219 case SSL2_ST_SEND_SERVER_VERIFY_A:
220 case SSL2_ST_SEND_SERVER_VERIFY_B:
221 ret=server_verify(s);
222 if (ret <= 0) goto end;
223 s->init_num=0;
224 if (s->hit)
225 {
226 /* If we are in here, we have been
227 * buffering the output, so we need to
228 * flush it and remove buffering from
229 * future traffic */
230 s->state=SSL2_ST_SEND_SERVER_VERIFY_C;
231 BREAK;
232 }
233 else
234 {
235 s->state=SSL2_ST_GET_CLIENT_FINISHED_A;
236 break;
237 }
238
239 case SSL2_ST_SEND_SERVER_VERIFY_C:
240 /* get the number of bytes to write */
241 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
242 if (num1 != 0)
243 {
244 s->rwstate=SSL_WRITING;
245 num1=BIO_flush(s->wbio);
246 if (num1 <= 0) { ret= -1; goto end; }
247 s->rwstate=SSL_NOTHING;
248 }
249
250 /* flushed and now remove buffering */
251 s->wbio=BIO_pop(s->wbio);
252
253 s->state=SSL2_ST_GET_CLIENT_FINISHED_A;
254 BREAK;
255
256 case SSL2_ST_GET_CLIENT_FINISHED_A:
257 case SSL2_ST_GET_CLIENT_FINISHED_B:
258 ret=get_client_finished(s);
259 if (ret <= 0)
260 goto end;
261 s->init_num=0;
262 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_A;
263 BREAK;
264
265 case SSL2_ST_SEND_REQUEST_CERTIFICATE_A:
266 case SSL2_ST_SEND_REQUEST_CERTIFICATE_B:
267 case SSL2_ST_SEND_REQUEST_CERTIFICATE_C:
268 case SSL2_ST_SEND_REQUEST_CERTIFICATE_D:
269 /* don't do a 'request certificate' if we
270 * don't want to, or we already have one, and
271 * we only want to do it once. */
272 if (!(s->verify_mode & SSL_VERIFY_PEER) ||
273 ((s->session->peer != NULL) &&
274 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)))
275 {
276 s->state=SSL2_ST_SEND_SERVER_FINISHED_A;
277 break;
278 }
279 else
280 {
281 ret=request_certificate(s);
282 if (ret <= 0) goto end;
283 s->init_num=0;
284 s->state=SSL2_ST_SEND_SERVER_FINISHED_A;
285 }
286 BREAK;
287
288 case SSL2_ST_SEND_SERVER_FINISHED_A:
289 case SSL2_ST_SEND_SERVER_FINISHED_B:
290 ret=server_finish(s);
291 if (ret <= 0) goto end;
292 s->init_num=0;
293 s->state=SSL_ST_OK;
294 break;
295
296 case SSL_ST_OK:
297 BUF_MEM_free(s->init_buf);
298 s->init_buf=NULL;
299 s->init_num=0;
300 /* ERR_clear_error();*/
301
302 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
303
304 s->ctx->sess_accept_good++;
305 /* s->server=1; */
306 ret=1;
307
308 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
309
310 goto end;
311 /* BREAK; */
312
313 default:
314 SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_UNKNOWN_STATE);
315 ret= -1;
316 goto end;
317 /* BREAK; */
318 }
319
320 if ((cb != NULL) && (s->state != state))
321 {
322 new_state=s->state;
323 s->state=state;
324 cb(s,SSL_CB_ACCEPT_LOOP,1);
325 s->state=new_state;
326 }
327 }
328 end:
329 s->in_handshake--;
330 if (cb != NULL)
331 cb(s,SSL_CB_ACCEPT_EXIT,ret);
332 return(ret);
333 }
334
335 static int get_client_master_key(s)
336 SSL *s;
337 {
338 int export,i,n,keya,ek;
339 #if 0
340 int error=0;
341 #endif
342 unsigned char *p;
343 SSL_CIPHER *cp;
344 EVP_CIPHER *c;
345 EVP_MD *md;
346
347 p=(unsigned char *)s->init_buf->data;
348 if (s->state == SSL2_ST_GET_CLIENT_MASTER_KEY_A)
349 {
350 i=ssl2_read(s,(char *)&(p[s->init_num]),10-s->init_num);
351
352 if (i < (10-s->init_num))
353 return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i));
354 if (*(p++) != SSL2_MT_CLIENT_MASTER_KEY)
355 {
356 if (p[-1] != SSL2_MT_ERROR)
357 {
358 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
359 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_READ_WRONG_PACKET_TYPE);
360 }
361 else
362 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,
363 SSL_R_PEER_ERROR);
364 return(-1);
365 }
366
367 cp=ssl2_get_cipher_by_char(p);
368 if (cp == NULL)
369 {
370 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
371 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,
372 SSL_R_NO_CIPHER_MATCH);
373 return(-1);
374 }
375 s->session->cipher= cp;
376
377 p+=3;
378 n2s(p,i); s->s2->tmp.clear=i;
379 n2s(p,i); s->s2->tmp.enc=i;
380 n2s(p,i); s->session->key_arg_length=i;
381 s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_B;
382 s->init_num=0;
383 }
384
385 /* SSL2_ST_GET_CLIENT_MASTER_KEY_B */
386 p=(unsigned char *)s->init_buf->data;
387 keya=s->session->key_arg_length;
388 n=s->s2->tmp.clear+s->s2->tmp.enc+keya - s->init_num;
389 i=ssl2_read(s,(char *)&(p[s->init_num]),n);
390 if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i));
391
392 memcpy(s->session->key_arg,&(p[s->s2->tmp.clear+s->s2->tmp.enc]),
393 (unsigned int)keya);
394
395 if (s->session->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL)
396 {
397 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
398 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_NO_PRIVATEKEY);
399 return(-1);
400 }
401 i=ssl_rsa_private_decrypt(s->cert,s->s2->tmp.enc,
402 &(p[s->s2->tmp.clear]),&(p[s->s2->tmp.clear]),
403 (s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING);
404
405 export=(s->session->cipher->algorithms & SSL_EXP)?1:0;
406
407 if (!ssl_cipher_get_evp(s->session->cipher,&c,&md))
408 {
409 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
410 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS);
411 return(0);
412 }
413
414 if (s->session->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC)
415 {
416 export=1;
417 ek=8;
418 }
419 else
420 ek=5;
421
422 /* bad decrypt */
423 #if 1
424 /* If a bad decrypt, continue with protocol but with a
425 * dud master secret */
426 if ((i < 0) ||
427 ((!export && (i != EVP_CIPHER_key_length(c)))
428 || ( export && ((i != ek) || (s->s2->tmp.clear+i !=
429 EVP_CIPHER_key_length(c))))))
430 {
431 if (export)
432 i=ek;
433 else
434 i=EVP_CIPHER_key_length(c);
435 RAND_bytes(p,i);
436 }
437 #else
438 if (i < 0)
439 {
440 error=1;
441 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_BAD_RSA_DECRYPT);
442 }
443 /* incorrect number of key bytes for non export cipher */
444 else if ((!export && (i != EVP_CIPHER_key_length(c)))
445 || ( export && ((i != ek) || (s->s2->tmp.clear+i !=
446 EVP_CIPHER_key_length(c)))))
447 {
448 error=1;
449 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_WRONG_NUMBER_OF_KEY_BITS);
450 }
451 if (error)
452 {
453 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
454 return(-1);
455 }
456 #endif
457
458 if (export) i+=s->s2->tmp.clear;
459 s->session->master_key_length=i;
460 memcpy(s->session->master_key,p,(unsigned int)i);
461 return(1);
462 }
463
464 static int get_client_hello(s)
465 SSL *s;
466 {
467 int i,n;
468 unsigned char *p;
469 STACK *cs; /* a stack of SSL_CIPHERS */
470 STACK *cl; /* the ones we want to use */
471 int z;
472
473 /* This is a bit of a hack to check for the correct packet
474 * type the first time round. */
475 if (s->state == SSL2_ST_GET_CLIENT_HELLO_A)
476 {
477 s->first_packet=1;
478 s->state=SSL2_ST_GET_CLIENT_HELLO_B;
479 }
480
481 p=(unsigned char *)s->init_buf->data;
482 if (s->state == SSL2_ST_GET_CLIENT_HELLO_B)
483 {
484 i=ssl2_read(s,(char *)&(p[s->init_num]),9-s->init_num);
485 if (i < (9-s->init_num))
486 return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i));
487
488 if (*(p++) != SSL2_MT_CLIENT_HELLO)
489 {
490 if (p[-1] != SSL2_MT_ERROR)
491 {
492 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
493 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_READ_WRONG_PACKET_TYPE);
494 }
495 else
496 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_PEER_ERROR);
497 return(-1);
498 }
499 n2s(p,i);
500 if (i < s->version) s->version=i;
501 n2s(p,i); s->s2->tmp.cipher_spec_length=i;
502 n2s(p,i); s->s2->tmp.session_id_length=i;
503 n2s(p,i); s->s2->challenge_length=i;
504 if ( (i < SSL2_MIN_CHALLENGE_LENGTH) ||
505 (i > SSL2_MAX_CHALLENGE_LENGTH))
506 {
507 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_INVALID_CHALLENGE_LENGTH);
508 return(-1);
509 }
510 s->state=SSL2_ST_GET_CLIENT_HELLO_C;
511 s->init_num=0;
512 }
513
514 /* SSL2_ST_GET_CLIENT_HELLO_C */
515 p=(unsigned char *)s->init_buf->data;
516 n=s->s2->tmp.cipher_spec_length+s->s2->challenge_length+
517 s->s2->tmp.session_id_length-s->init_num;
518 i=ssl2_read(s,(char *)&(p[s->init_num]),n);
519 if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i));
520
521 /* get session-id before cipher stuff so we can get out session
522 * structure if it is cached */
523 /* session-id */
524 if ((s->s2->tmp.session_id_length != 0) &&
525 (s->s2->tmp.session_id_length != SSL2_SSL_SESSION_ID_LENGTH))
526 {
527 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
528 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_BAD_SSL_SESSION_ID_LENGTH);
529 return(-1);
530 }
531
532 if (s->s2->tmp.session_id_length == 0)
533 {
534 if (!ssl_get_new_session(s,1))
535 {
536 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
537 return(-1);
538 }
539 }
540 else
541 {
542 i=ssl_get_prev_session(s,&(p[s->s2->tmp.cipher_spec_length]),
543 s->s2->tmp.session_id_length);
544 if (i == 1)
545 { /* previous session */
546 s->hit=1;
547 }
548 else if (i == -1)
549 {
550 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
551 return(-1);
552 }
553 else
554 {
555 if (s->cert == NULL)
556 {
557 ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE);
558 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_NO_CERTIFICATE_SET);
559 return(-1);
560 }
561
562 if (!ssl_get_new_session(s,1))
563 {
564 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
565 return(-1);
566 }
567 }
568 }
569
570 if (!s->hit)
571 {
572 cs=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.cipher_spec_length,
573 &s->session->ciphers);
574 if (cs == NULL) goto mem_err;
575
576 cl=ssl_get_ciphers_by_id(s);
577
578 for (z=0; z<sk_num(cs); z++)
579 {
580 if (sk_find(cl,sk_value(cs,z)) < 0)
581 {
582 sk_delete(cs,z);
583 z--;
584 }
585 }
586
587 /* s->session->ciphers should now have a list of
588 * ciphers that are on both the client and server.
589 * This list is ordered by the order the client sent
590 * the ciphers.
591 */
592 }
593 p+=s->s2->tmp.cipher_spec_length;
594 /* done cipher selection */
595
596 /* session id extracted already */
597 p+=s->s2->tmp.session_id_length;
598
599 /* challenge */
600 memcpy(s->s2->challenge,p,(unsigned int)s->s2->challenge_length);
601 return(1);
602 mem_err:
603 SSLerr(SSL_F_GET_CLIENT_HELLO,ERR_R_MALLOC_FAILURE);
604 return(0);
605 }
606
607 static int server_hello(s)
608 SSL *s;
609 {
610 unsigned char *p,*d;
611 int n,hit;
612 STACK *sk;
613
614 p=(unsigned char *)s->init_buf->data;
615 if (s->state == SSL2_ST_SEND_SERVER_HELLO_A)
616 {
617 d=p+11;
618 *(p++)=SSL2_MT_SERVER_HELLO; /* type */
619 hit=s->hit;
620 *(p++)=(unsigned char)hit;
621 if (!hit)
622 { /* else add cert to session */
623 CRYPTO_add(&s->cert->references,1,CRYPTO_LOCK_SSL_CERT);
624 if (s->session->cert != NULL)
625 ssl_cert_free(s->session->cert);
626 s->session->cert=s->cert;
627 }
628 else /* We have a session id-cache hit, if the
629 * session-id has no certificate listed against
630 * the 'cert' structure, grab the 'old' one
631 * listed against the SSL connection */
632 {
633 if (s->session->cert == NULL)
634 {
635 CRYPTO_add(&s->cert->references,1,
636 CRYPTO_LOCK_SSL_CERT);
637 s->session->cert=s->cert;
638 }
639 }
640
641 if (s->session->cert == NULL)
642 {
643 ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE);
644 SSLerr(SSL_F_SERVER_HELLO,SSL_R_NO_CERTIFICATE_SPECIFIED);
645 return(-1);
646 }
647
648 if (hit)
649 {
650 *(p++)=0; /* no certificate type */
651 s2n(s->version,p); /* version */
652 s2n(0,p); /* cert len */
653 s2n(0,p); /* ciphers len */
654 }
655 else
656 {
657 /* EAY EAY */
658 /* put certificate type */
659 *(p++)=SSL2_CT_X509_CERTIFICATE;
660 s2n(s->version,p); /* version */
661 n=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL);
662 s2n(n,p); /* certificate length */
663 i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&d);
664 n=0;
665
666 /* lets send out the ciphers we like in the
667 * prefered order */
668 sk= s->session->ciphers;
669 n=ssl_cipher_list_to_bytes(s,s->session->ciphers,d);
670 d+=n;
671 s2n(n,p); /* add cipher length */
672 }
673
674 /* make and send conn_id */
675 s2n(SSL2_CONNECTION_ID_LENGTH,p); /* add conn_id length */
676 s->s2->conn_id_length=SSL2_CONNECTION_ID_LENGTH;
677 RAND_bytes(s->s2->conn_id,(int)s->s2->conn_id_length);
678 memcpy(d,s->s2->conn_id,SSL2_CONNECTION_ID_LENGTH);
679 d+=SSL2_CONNECTION_ID_LENGTH;
680
681 s->state=SSL2_ST_SEND_SERVER_HELLO_B;
682 s->init_num=d-(unsigned char *)s->init_buf->data;
683 s->init_off=0;
684 }
685 /* SSL2_ST_SEND_SERVER_HELLO_B */
686 /* If we are using TCP/IP, the performace is bad if we do 2
687 * writes without a read between them. This occurs when
688 * Session-id reuse is used, so I will put in a buffering module
689 */
690 if (s->hit)
691 {
692 if (!ssl_init_wbio_buffer(s,1)) return(-1);
693 }
694
695 return(ssl2_do_write(s));
696 }
697
698 static int get_client_finished(s)
699 SSL *s;
700 {
701 unsigned char *p;
702 int i;
703
704 p=(unsigned char *)s->init_buf->data;
705 if (s->state == SSL2_ST_GET_CLIENT_FINISHED_A)
706 {
707 i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num);
708 if (i < 1-s->init_num)
709 return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i));
710
711 if (*p != SSL2_MT_CLIENT_FINISHED)
712 {
713 if (*p != SSL2_MT_ERROR)
714 {
715 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
716 SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE);
717 }
718 else
719 SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_PEER_ERROR);
720 return(-1);
721 }
722 s->init_num=0;
723 s->state=SSL2_ST_GET_CLIENT_FINISHED_B;
724 }
725
726 /* SSL2_ST_GET_CLIENT_FINISHED_B */
727 i=ssl2_read(s,(char *)&(p[s->init_num]),s->s2->conn_id_length-s->init_num);
728 if (i < (int)s->s2->conn_id_length-s->init_num)
729 {
730 return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i));
731 }
732 if (memcmp(p,s->s2->conn_id,(unsigned int)s->s2->conn_id_length) != 0)
733 {
734 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
735 SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_CONNECTION_ID_IS_DIFFERENT);
736 return(-1);
737 }
738 return(1);
739 }
740
741 static int server_verify(s)
742 SSL *s;
743 {
744 unsigned char *p;
745
746 if (s->state == SSL2_ST_SEND_SERVER_VERIFY_A)
747 {
748 p=(unsigned char *)s->init_buf->data;
749 *(p++)=SSL2_MT_SERVER_VERIFY;
750 memcpy(p,s->s2->challenge,(unsigned int)s->s2->challenge_length);
751 /* p+=s->s2->challenge_length; */
752
753 s->state=SSL2_ST_SEND_SERVER_VERIFY_B;
754 s->init_num=s->s2->challenge_length+1;
755 s->init_off=0;
756 }
757 return(ssl2_do_write(s));
758 }
759
760 static int server_finish(s)
761 SSL *s;
762 {
763 unsigned char *p;
764
765 if (s->state == SSL2_ST_SEND_SERVER_FINISHED_A)
766 {
767 p=(unsigned char *)s->init_buf->data;
768 *(p++)=SSL2_MT_SERVER_FINISHED;
769
770 memcpy(p,s->session->session_id,
771 (unsigned int)s->session->session_id_length);
772 /* p+=s->session->session_id_length; */
773
774 s->state=SSL2_ST_SEND_SERVER_FINISHED_B;
775 s->init_num=s->session->session_id_length+1;
776 s->init_off=0;
777 }
778
779 /* SSL2_ST_SEND_SERVER_FINISHED_B */
780 return(ssl2_do_write(s));
781 }
782
783 /* send the request and check the response */
784 static int request_certificate(s)
785 SSL *s;
786 {
787 unsigned char *p,*p2,*buf2;
788 unsigned char *ccd;
789 int i,j,ctype,ret= -1;
790 X509 *x509=NULL;
791 STACK *sk=NULL;
792
793 ccd=s->s2->tmp.ccl;
794 if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_A)
795 {
796 p=(unsigned char *)s->init_buf->data;
797 *(p++)=SSL2_MT_REQUEST_CERTIFICATE;
798 *(p++)=SSL2_AT_MD5_WITH_RSA_ENCRYPTION;
799 RAND_bytes(ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
800 memcpy(p,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
801
802 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_B;
803 s->init_num=SSL2_MIN_CERT_CHALLENGE_LENGTH+2;
804 s->init_off=0;
805 }
806
807 if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_B)
808 {
809 i=ssl2_do_write(s);
810 if (i <= 0)
811 {
812 ret=i;
813 goto end;
814 }
815
816 s->init_num=0;
817 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_C;
818 }
819
820 if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_C)
821 {
822 p=(unsigned char *)s->init_buf->data;
823 i=ssl2_read(s,(char *)&(p[s->init_num]),6-s->init_num);
824 if (i < 3)
825 {
826 ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i);
827 goto end;
828 }
829
830 if ((*p == SSL2_MT_ERROR) && (i >= 3))
831 {
832 n2s(p,i);
833 if (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)
834 {
835 ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
836 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
837 goto end;
838 }
839 ret=1;
840 goto end;
841 }
842 if ((*(p++) != SSL2_MT_CLIENT_CERTIFICATE) || (i < 6))
843 {
844 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
845 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_SHORT_READ);
846 goto end;
847 }
848 /* ok we have a response */
849 /* certificate type, there is only one right now. */
850 ctype= *(p++);
851 if (ctype != SSL2_AT_MD5_WITH_RSA_ENCRYPTION)
852 {
853 ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE);
854 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_RESPONSE_ARGUMENT);
855 goto end;
856 }
857 n2s(p,i); s->s2->tmp.clen=i;
858 n2s(p,i); s->s2->tmp.rlen=i;
859 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_D;
860 s->init_num=0;
861 }
862
863 /* SSL2_ST_SEND_REQUEST_CERTIFICATE_D */
864 p=(unsigned char *)s->init_buf->data;
865 j=s->s2->tmp.clen+s->s2->tmp.rlen-s->init_num;
866 i=ssl2_read(s,(char *)&(p[s->init_num]),j);
867 if (i < j)
868 {
869 ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i);
870 goto end;
871 }
872
873 x509=(X509 *)d2i_X509(NULL,&p,(long)s->s2->tmp.clen);
874 if (x509 == NULL)
875 {
876 SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_X509_LIB);
877 goto msg_end;
878 }
879
880 if (((sk=sk_new_null()) == NULL) || (!sk_push(sk,(char *)x509)))
881 {
882 SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE);
883 goto msg_end;
884 }
885
886 i=ssl_verify_cert_chain(s,sk);
887
888 if (i) /* we like the packet, now check the chksum */
889 {
890 EVP_MD_CTX ctx;
891 EVP_PKEY *pkey=NULL;
892
893 EVP_VerifyInit(&ctx,s->ctx->rsa_md5);
894 EVP_VerifyUpdate(&ctx,s->s2->key_material,
895 (unsigned int)s->s2->key_material_length);
896 EVP_VerifyUpdate(&ctx,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
897
898 i=i2d_X509(s->session->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL);
899 buf2=(unsigned char *)Malloc((unsigned int)i);
900 if (buf2 == NULL)
901 {
902 SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE);
903 goto msg_end;
904 }
905 p2=buf2;
906 i=i2d_X509(s->session->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&p2);
907 EVP_VerifyUpdate(&ctx,buf2,(unsigned int)i);
908 Free(buf2);
909
910 pkey=X509_get_pubkey(x509);
911 if (pkey == NULL) goto end;
912 i=EVP_VerifyFinal(&ctx,p,s->s2->tmp.rlen,pkey);
913 memset(&ctx,0,sizeof(ctx));
914
915 if (i)
916 {
917 if (s->session->peer != NULL)
918 X509_free(s->session->peer);
919 s->session->peer=x509;
920 CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
921 ret=1;
922 goto end;
923 }
924 else
925 {
926 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_CHECKSUM);
927 goto msg_end;
928 }
929 }
930 else
931 {
932 msg_end:
933 ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
934 }
935 end:
936 if (sk != NULL) sk_free(sk);
937 if (x509 != NULL) X509_free(x509);
938 return(ret);
939 }
940
941 static int ssl_rsa_private_decrypt(c, len, from, to,padding)
942 CERT *c;
943 int len;
944 unsigned char *from;
945 unsigned char *to;
946 int padding;
947 {
948 RSA *rsa;
949 int i;
950
951 if ((c == NULL) || (c->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL))
952 {
953 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_NO_PRIVATEKEY);
954 return(-1);
955 }
956 if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey->type != EVP_PKEY_RSA)
957 {
958 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA);
959 return(-1);
960 }
961 rsa=c->pkeys[SSL_PKEY_RSA_ENC].privatekey->pkey.rsa;
962
963 /* we have the public key */
964 i=RSA_private_decrypt(len,from,to,rsa,padding);
965 if (i < 0)
966 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,ERR_R_RSA_LIB);
967 return(i);
968 }
969
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