Import OpenSSL-1.0.0b.
[dragonfly.git] / crypto / openssl / ssl / s3_enc.c
CommitLineData
56276539
SS
1/* ssl/s3_enc.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/* ====================================================================
919b01cc 59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
56276539
SS
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 */
919b01cc
PA
111/* ====================================================================
112 * Copyright 2005 Nokia. All rights reserved.
113 *
114 * The portions of the attached software ("Contribution") is developed by
115 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
116 * license.
117 *
118 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
119 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
120 * support (see RFC 4279) to OpenSSL.
121 *
122 * No patent licenses or other rights except those expressly stated in
123 * the OpenSSL open source license shall be deemed granted or received
124 * expressly, by implication, estoppel, or otherwise.
125 *
126 * No assurances are provided by Nokia that the Contribution does not
127 * infringe the patent or other intellectual property rights of any third
128 * party or that the license provides you with all the necessary rights
129 * to make use of the Contribution.
130 *
131 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
132 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
133 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
134 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
135 * OTHERWISE.
136 */
56276539
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137
138#include <stdio.h>
139#include "ssl_locl.h"
140#include <openssl/evp.h>
141#include <openssl/md5.h>
142
143static unsigned char ssl3_pad_1[48]={
144 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
145 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
146 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
147 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
148 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
149 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36 };
150
151static unsigned char ssl3_pad_2[48]={
152 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
153 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
154 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
155 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
156 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
157 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c };
919b01cc 158static int ssl3_handshake_mac(SSL *s, int md_nid,
56276539 159 const char *sender, int len, unsigned char *p);
56276539
SS
160static int ssl3_generate_key_block(SSL *s, unsigned char *km, int num)
161 {
162 EVP_MD_CTX m5;
163 EVP_MD_CTX s1;
164 unsigned char buf[16],smd[SHA_DIGEST_LENGTH];
165 unsigned char c='A';
166 unsigned int i,j,k;
167
168#ifdef CHARSET_EBCDIC
169 c = os_toascii[c]; /*'A' in ASCII */
170#endif
171 k=0;
172 EVP_MD_CTX_init(&m5);
173 EVP_MD_CTX_init(&s1);
174 for (i=0; (int)i<num; i+=MD5_DIGEST_LENGTH)
175 {
176 k++;
177 if (k > sizeof buf)
178 {
179 /* bug: 'buf' is too small for this ciphersuite */
180 SSLerr(SSL_F_SSL3_GENERATE_KEY_BLOCK, ERR_R_INTERNAL_ERROR);
181 return 0;
182 }
183
184 for (j=0; j<k; j++)
185 buf[j]=c;
186 c++;
187 EVP_DigestInit_ex(&s1,EVP_sha1(), NULL);
188 EVP_DigestUpdate(&s1,buf,k);
189 EVP_DigestUpdate(&s1,s->session->master_key,
190 s->session->master_key_length);
191 EVP_DigestUpdate(&s1,s->s3->server_random,SSL3_RANDOM_SIZE);
192 EVP_DigestUpdate(&s1,s->s3->client_random,SSL3_RANDOM_SIZE);
193 EVP_DigestFinal_ex(&s1,smd,NULL);
194
195 EVP_DigestInit_ex(&m5,EVP_md5(), NULL);
196 EVP_DigestUpdate(&m5,s->session->master_key,
197 s->session->master_key_length);
198 EVP_DigestUpdate(&m5,smd,SHA_DIGEST_LENGTH);
199 if ((int)(i+MD5_DIGEST_LENGTH) > num)
200 {
201 EVP_DigestFinal_ex(&m5,smd,NULL);
202 memcpy(km,smd,(num-i));
203 }
204 else
205 EVP_DigestFinal_ex(&m5,km,NULL);
206
207 km+=MD5_DIGEST_LENGTH;
208 }
209 OPENSSL_cleanse(smd,SHA_DIGEST_LENGTH);
210 EVP_MD_CTX_cleanup(&m5);
211 EVP_MD_CTX_cleanup(&s1);
212 return 1;
213 }
214
215int ssl3_change_cipher_state(SSL *s, int which)
216 {
9f1859dd 217 unsigned char *p,*mac_secret;
56276539
SS
218 unsigned char exp_key[EVP_MAX_KEY_LENGTH];
219 unsigned char exp_iv[EVP_MAX_IV_LENGTH];
220 unsigned char *ms,*key,*iv,*er1,*er2;
221 EVP_CIPHER_CTX *dd;
222 const EVP_CIPHER *c;
5bd86ce5 223#ifndef OPENSSL_NO_COMP
56276539 224 COMP_METHOD *comp;
5bd86ce5 225#endif
56276539
SS
226 const EVP_MD *m;
227 EVP_MD_CTX md;
228 int is_exp,n,i,j,k,cl;
229 int reuse_dd = 0;
230
231 is_exp=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
232 c=s->s3->tmp.new_sym_enc;
233 m=s->s3->tmp.new_hash;
919b01cc
PA
234 /* m == NULL will lead to a crash later */
235 OPENSSL_assert(m);
5bd86ce5 236#ifndef OPENSSL_NO_COMP
56276539
SS
237 if (s->s3->tmp.new_compression == NULL)
238 comp=NULL;
239 else
240 comp=s->s3->tmp.new_compression->method;
5bd86ce5 241#endif
56276539
SS
242
243 if (which & SSL3_CC_READ)
244 {
245 if (s->enc_read_ctx != NULL)
246 reuse_dd = 1;
247 else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
248 goto err;
e40c9513
PA
249 else
250 /* make sure it's intialized in case we exit later with an error */
251 EVP_CIPHER_CTX_init(s->enc_read_ctx);
56276539 252 dd= s->enc_read_ctx;
919b01cc
PA
253
254 ssl_replace_hash(&s->read_hash,m);
5bd86ce5 255#ifndef OPENSSL_NO_COMP
56276539
SS
256 /* COMPRESS */
257 if (s->expand != NULL)
258 {
259 COMP_CTX_free(s->expand);
260 s->expand=NULL;
261 }
262 if (comp != NULL)
263 {
264 s->expand=COMP_CTX_new(comp);
265 if (s->expand == NULL)
266 {
267 SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
268 goto err2;
269 }
270 if (s->s3->rrec.comp == NULL)
271 s->s3->rrec.comp=(unsigned char *)
272 OPENSSL_malloc(SSL3_RT_MAX_PLAIN_LENGTH);
273 if (s->s3->rrec.comp == NULL)
274 goto err;
275 }
5bd86ce5 276#endif
56276539
SS
277 memset(&(s->s3->read_sequence[0]),0,8);
278 mac_secret= &(s->s3->read_mac_secret[0]);
279 }
280 else
281 {
282 if (s->enc_write_ctx != NULL)
283 reuse_dd = 1;
284 else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
285 goto err;
e40c9513
PA
286 else
287 /* make sure it's intialized in case we exit later with an error */
288 EVP_CIPHER_CTX_init(s->enc_write_ctx);
56276539 289 dd= s->enc_write_ctx;
919b01cc 290 ssl_replace_hash(&s->write_hash,m);
5bd86ce5 291#ifndef OPENSSL_NO_COMP
56276539
SS
292 /* COMPRESS */
293 if (s->compress != NULL)
294 {
295 COMP_CTX_free(s->compress);
296 s->compress=NULL;
297 }
298 if (comp != NULL)
299 {
300 s->compress=COMP_CTX_new(comp);
301 if (s->compress == NULL)
302 {
303 SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
304 goto err2;
305 }
306 }
5bd86ce5 307#endif
56276539
SS
308 memset(&(s->s3->write_sequence[0]),0,8);
309 mac_secret= &(s->s3->write_mac_secret[0]);
310 }
311
312 if (reuse_dd)
313 EVP_CIPHER_CTX_cleanup(dd);
56276539
SS
314
315 p=s->s3->tmp.key_block;
316 i=EVP_MD_size(m);
919b01cc
PA
317 if (i < 0)
318 goto err2;
56276539
SS
319 cl=EVP_CIPHER_key_length(c);
320 j=is_exp ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
321 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
322 /* Was j=(is_exp)?5:EVP_CIPHER_key_length(c); */
323 k=EVP_CIPHER_iv_length(c);
324 if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
325 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
326 {
327 ms= &(p[ 0]); n=i+i;
328 key= &(p[ n]); n+=j+j;
329 iv= &(p[ n]); n+=k+k;
330 er1= &(s->s3->client_random[0]);
331 er2= &(s->s3->server_random[0]);
332 }
333 else
334 {
335 n=i;
336 ms= &(p[ n]); n+=i+j;
337 key= &(p[ n]); n+=j+k;
338 iv= &(p[ n]); n+=k;
339 er1= &(s->s3->server_random[0]);
340 er2= &(s->s3->client_random[0]);
341 }
342
343 if (n > s->s3->tmp.key_block_length)
344 {
345 SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
346 goto err2;
347 }
348
349 EVP_MD_CTX_init(&md);
350 memcpy(mac_secret,ms,i);
351 if (is_exp)
352 {
353 /* In here I set both the read and write key/iv to the
354 * same value since only the correct one will be used :-).
355 */
356 EVP_DigestInit_ex(&md,EVP_md5(), NULL);
357 EVP_DigestUpdate(&md,key,j);
358 EVP_DigestUpdate(&md,er1,SSL3_RANDOM_SIZE);
359 EVP_DigestUpdate(&md,er2,SSL3_RANDOM_SIZE);
360 EVP_DigestFinal_ex(&md,&(exp_key[0]),NULL);
361 key= &(exp_key[0]);
362
363 if (k > 0)
364 {
365 EVP_DigestInit_ex(&md,EVP_md5(), NULL);
366 EVP_DigestUpdate(&md,er1,SSL3_RANDOM_SIZE);
367 EVP_DigestUpdate(&md,er2,SSL3_RANDOM_SIZE);
368 EVP_DigestFinal_ex(&md,&(exp_iv[0]),NULL);
369 iv= &(exp_iv[0]);
370 }
371 }
372
373 s->session->key_arg_length=0;
374
375 EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
376
377 OPENSSL_cleanse(&(exp_key[0]),sizeof(exp_key));
378 OPENSSL_cleanse(&(exp_iv[0]),sizeof(exp_iv));
379 EVP_MD_CTX_cleanup(&md);
380 return(1);
381err:
382 SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
383err2:
384 return(0);
385 }
386
387int ssl3_setup_key_block(SSL *s)
388 {
389 unsigned char *p;
390 const EVP_CIPHER *c;
391 const EVP_MD *hash;
392 int num;
393 int ret = 0;
394 SSL_COMP *comp;
395
396 if (s->s3->tmp.key_block_length != 0)
397 return(1);
398
919b01cc 399 if (!ssl_cipher_get_evp(s->session,&c,&hash,NULL,NULL,&comp))
56276539
SS
400 {
401 SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
402 return(0);
403 }
404
405 s->s3->tmp.new_sym_enc=c;
406 s->s3->tmp.new_hash=hash;
5bd86ce5
SS
407#ifdef OPENSSL_NO_COMP
408 s->s3->tmp.new_compression=NULL;
409#else
56276539 410 s->s3->tmp.new_compression=comp;
5bd86ce5 411#endif
56276539 412
919b01cc
PA
413 num=EVP_MD_size(hash);
414 if (num < 0)
415 return 0;
416
417 num=EVP_CIPHER_key_length(c)+num+EVP_CIPHER_iv_length(c);
56276539
SS
418 num*=2;
419
420 ssl3_cleanup_key_block(s);
421
422 if ((p=OPENSSL_malloc(num)) == NULL)
423 goto err;
424
425 s->s3->tmp.key_block_length=num;
426 s->s3->tmp.key_block=p;
427
428 ret = ssl3_generate_key_block(s,p,num);
429
430 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
431 {
432 /* enable vulnerability countermeasure for CBC ciphers with
433 * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
434 */
435 s->s3->need_empty_fragments = 1;
436
437 if (s->session->cipher != NULL)
438 {
919b01cc 439 if (s->session->cipher->algorithm_enc == SSL_eNULL)
56276539
SS
440 s->s3->need_empty_fragments = 0;
441
442#ifndef OPENSSL_NO_RC4
919b01cc 443 if (s->session->cipher->algorithm_enc == SSL_RC4)
56276539
SS
444 s->s3->need_empty_fragments = 0;
445#endif
446 }
447 }
448
449 return ret;
450
451err:
452 SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
453 return(0);
454 }
455
456void ssl3_cleanup_key_block(SSL *s)
457 {
458 if (s->s3->tmp.key_block != NULL)
459 {
460 OPENSSL_cleanse(s->s3->tmp.key_block,
461 s->s3->tmp.key_block_length);
462 OPENSSL_free(s->s3->tmp.key_block);
463 s->s3->tmp.key_block=NULL;
464 }
465 s->s3->tmp.key_block_length=0;
466 }
467
468int ssl3_enc(SSL *s, int send)
469 {
470 SSL3_RECORD *rec;
471 EVP_CIPHER_CTX *ds;
472 unsigned long l;
473 int bs,i;
474 const EVP_CIPHER *enc;
475
476 if (send)
477 {
478 ds=s->enc_write_ctx;
479 rec= &(s->s3->wrec);
480 if (s->enc_write_ctx == NULL)
481 enc=NULL;
482 else
483 enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
484 }
485 else
486 {
487 ds=s->enc_read_ctx;
488 rec= &(s->s3->rrec);
489 if (s->enc_read_ctx == NULL)
490 enc=NULL;
491 else
492 enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
493 }
494
495 if ((s->session == NULL) || (ds == NULL) ||
496 (enc == NULL))
497 {
498 memmove(rec->data,rec->input,rec->length);
499 rec->input=rec->data;
500 }
501 else
502 {
503 l=rec->length;
504 bs=EVP_CIPHER_block_size(ds->cipher);
505
506 /* COMPRESS */
507
508 if ((bs != 1) && send)
509 {
510 i=bs-((int)l%bs);
511
512 /* we need to add 'i-1' padding bytes */
513 l+=i;
514 rec->length+=i;
515 rec->input[l-1]=(i-1);
516 }
517
518 if (!send)
519 {
520 if (l == 0 || l%bs != 0)
521 {
522 SSLerr(SSL_F_SSL3_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
523 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
524 return 0;
525 }
526 /* otherwise, rec->length >= bs */
527 }
528
529 EVP_Cipher(ds,rec->data,rec->input,l);
530
531 if ((bs != 1) && !send)
532 {
533 i=rec->data[l-1]+1;
534 /* SSL 3.0 bounds the number of padding bytes by the block size;
535 * padding bytes (except the last one) are arbitrary */
536 if (i > bs)
537 {
538 /* Incorrect padding. SSLerr() and ssl3_alert are done
539 * by caller: we don't want to reveal whether this is
540 * a decryption error or a MAC verification failure
541 * (see http://www.openssl.org/~bodo/tls-cbc.txt) */
542 return -1;
543 }
544 /* now i <= bs <= rec->length */
545 rec->length-=i;
546 }
547 }
548 return(1);
549 }
550
551void ssl3_init_finished_mac(SSL *s)
552 {
919b01cc
PA
553 if (s->s3->handshake_buffer) BIO_free(s->s3->handshake_buffer);
554 if (s->s3->handshake_dgst) ssl3_free_digest_list(s);
555 s->s3->handshake_buffer=BIO_new(BIO_s_mem());
556 (void)BIO_set_close(s->s3->handshake_buffer,BIO_CLOSE);
56276539
SS
557 }
558
919b01cc
PA
559void ssl3_free_digest_list(SSL *s)
560 {
561 int i;
562 if (!s->s3->handshake_dgst) return;
563 for (i=0;i<SSL_MAX_DIGEST;i++)
564 {
565 if (s->s3->handshake_dgst[i])
566 EVP_MD_CTX_destroy(s->s3->handshake_dgst[i]);
567 }
568 OPENSSL_free(s->s3->handshake_dgst);
569 s->s3->handshake_dgst=NULL;
570 }
571
572
573
56276539
SS
574void ssl3_finish_mac(SSL *s, const unsigned char *buf, int len)
575 {
919b01cc
PA
576 if (s->s3->handshake_buffer)
577 {
578 BIO_write (s->s3->handshake_buffer,(void *)buf,len);
579 }
580 else
581 {
582 int i;
583 for (i=0;i< SSL_MAX_DIGEST;i++)
584 {
585 if (s->s3->handshake_dgst[i]!= NULL)
586 EVP_DigestUpdate(s->s3->handshake_dgst[i],buf,len);
587 }
588 }
56276539
SS
589 }
590
919b01cc 591int ssl3_digest_cached_records(SSL *s)
56276539 592 {
919b01cc
PA
593 int i;
594 long mask;
595 const EVP_MD *md;
596 long hdatalen;
597 void *hdata;
598
599 /* Allocate handshake_dgst array */
600 ssl3_free_digest_list(s);
601 s->s3->handshake_dgst = OPENSSL_malloc(SSL_MAX_DIGEST * sizeof(EVP_MD_CTX *));
602 memset(s->s3->handshake_dgst,0,SSL_MAX_DIGEST *sizeof(EVP_MD_CTX *));
603 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,&hdata);
604 if (hdatalen <= 0)
605 {
606 SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS, SSL_R_BAD_HANDSHAKE_LENGTH);
607 return 0;
608 }
609
610 /* Loop through bitso of algorithm2 field and create MD_CTX-es */
611 for (i=0;ssl_get_handshake_digest(i,&mask,&md); i++)
612 {
613 if ((mask & s->s3->tmp.new_cipher->algorithm2) && md)
614 {
615 s->s3->handshake_dgst[i]=EVP_MD_CTX_create();
616 EVP_DigestInit_ex(s->s3->handshake_dgst[i],md,NULL);
617 EVP_DigestUpdate(s->s3->handshake_dgst[i],hdata,hdatalen);
618 }
619 else
620 {
621 s->s3->handshake_dgst[i]=NULL;
622 }
623 }
624 /* Free handshake_buffer BIO */
625 BIO_free(s->s3->handshake_buffer);
626 s->s3->handshake_buffer = NULL;
627
628 return 1;
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629 }
630
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631int ssl3_cert_verify_mac(SSL *s, int md_nid, unsigned char *p)
632 {
633 return(ssl3_handshake_mac(s,md_nid,NULL,0,p));
634 }
635int ssl3_final_finish_mac(SSL *s,
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636 const char *sender, int len, unsigned char *p)
637 {
638 int ret;
919b01cc 639 ret=ssl3_handshake_mac(s,NID_md5,sender,len,p);
56276539 640 p+=ret;
919b01cc 641 ret+=ssl3_handshake_mac(s,NID_sha1,sender,len,p);
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642 return(ret);
643 }
919b01cc 644static int ssl3_handshake_mac(SSL *s, int md_nid,
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645 const char *sender, int len, unsigned char *p)
646 {
647 unsigned int ret;
648 int npad,n;
649 unsigned int i;
650 unsigned char md_buf[EVP_MAX_MD_SIZE];
919b01cc 651 EVP_MD_CTX ctx,*d=NULL;
56276539 652
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PA
653 if (s->s3->handshake_buffer)
654 if (!ssl3_digest_cached_records(s))
655 return 0;
56276539 656
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657 /* Search for digest of specified type in the handshake_dgst
658 * array*/
659 for (i=0;i<SSL_MAX_DIGEST;i++)
660 {
661 if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid)
662 {
663 d=s->s3->handshake_dgst[i];
664 break;
665 }
666 }
667 if (!d) {
668 SSLerr(SSL_F_SSL3_HANDSHAKE_MAC,SSL_R_NO_REQUIRED_DIGEST);
669 return 0;
670 }
671 EVP_MD_CTX_init(&ctx);
672 EVP_MD_CTX_copy_ex(&ctx,d);
56276539 673 n=EVP_MD_CTX_size(&ctx);
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674 if (n < 0)
675 return 0;
56276539 676
919b01cc 677 npad=(48/n)*n;
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678 if (sender != NULL)
679 EVP_DigestUpdate(&ctx,sender,len);
680 EVP_DigestUpdate(&ctx,s->session->master_key,
681 s->session->master_key_length);
682 EVP_DigestUpdate(&ctx,ssl3_pad_1,npad);
683 EVP_DigestFinal_ex(&ctx,md_buf,&i);
684
685 EVP_DigestInit_ex(&ctx,EVP_MD_CTX_md(&ctx), NULL);
686 EVP_DigestUpdate(&ctx,s->session->master_key,
687 s->session->master_key_length);
688 EVP_DigestUpdate(&ctx,ssl3_pad_2,npad);
689 EVP_DigestUpdate(&ctx,md_buf,i);
690 EVP_DigestFinal_ex(&ctx,p,&ret);
691
692 EVP_MD_CTX_cleanup(&ctx);
693
694 return((int)ret);
695 }
696
919b01cc 697int n_ssl3_mac(SSL *ssl, unsigned char *md, int send)
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698 {
699 SSL3_RECORD *rec;
700 unsigned char *mac_sec,*seq;
701 EVP_MD_CTX md_ctx;
919b01cc 702 const EVP_MD_CTX *hash;
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703 unsigned char *p,rec_char;
704 unsigned int md_size;
705 int npad;
919b01cc 706 int t;
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707
708 if (send)
709 {
710 rec= &(ssl->s3->wrec);
711 mac_sec= &(ssl->s3->write_mac_secret[0]);
712 seq= &(ssl->s3->write_sequence[0]);
713 hash=ssl->write_hash;
714 }
715 else
716 {
717 rec= &(ssl->s3->rrec);
718 mac_sec= &(ssl->s3->read_mac_secret[0]);
719 seq= &(ssl->s3->read_sequence[0]);
720 hash=ssl->read_hash;
721 }
722
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723 t=EVP_MD_CTX_size(hash);
724 if (t < 0)
725 return -1;
726 md_size=t;
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727 npad=(48/md_size)*md_size;
728
729 /* Chop the digest off the end :-) */
730 EVP_MD_CTX_init(&md_ctx);
731
919b01cc 732 EVP_MD_CTX_copy_ex( &md_ctx,hash);
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733 EVP_DigestUpdate(&md_ctx,mac_sec,md_size);
734 EVP_DigestUpdate(&md_ctx,ssl3_pad_1,npad);
735 EVP_DigestUpdate(&md_ctx,seq,8);
736 rec_char=rec->type;
737 EVP_DigestUpdate(&md_ctx,&rec_char,1);
738 p=md;
739 s2n(rec->length,p);
740 EVP_DigestUpdate(&md_ctx,md,2);
741 EVP_DigestUpdate(&md_ctx,rec->input,rec->length);
742 EVP_DigestFinal_ex( &md_ctx,md,NULL);
743
919b01cc 744 EVP_MD_CTX_copy_ex( &md_ctx,hash);
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745 EVP_DigestUpdate(&md_ctx,mac_sec,md_size);
746 EVP_DigestUpdate(&md_ctx,ssl3_pad_2,npad);
747 EVP_DigestUpdate(&md_ctx,md,md_size);
748 EVP_DigestFinal_ex( &md_ctx,md,&md_size);
749
750 EVP_MD_CTX_cleanup(&md_ctx);
751
752 ssl3_record_sequence_update(seq);
753 return(md_size);
754 }
755
756void ssl3_record_sequence_update(unsigned char *seq)
757 {
758 int i;
759
760 for (i=7; i>=0; i--)
761 {
762 ++seq[i];
763 if (seq[i] != 0) break;
764 }
765 }
766
767int ssl3_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
768 int len)
769 {
770 static const unsigned char *salt[3]={
771#ifndef CHARSET_EBCDIC
772 (const unsigned char *)"A",
773 (const unsigned char *)"BB",
774 (const unsigned char *)"CCC",
775#else
776 (const unsigned char *)"\x41",
777 (const unsigned char *)"\x42\x42",
778 (const unsigned char *)"\x43\x43\x43",
779#endif
780 };
781 unsigned char buf[EVP_MAX_MD_SIZE];
782 EVP_MD_CTX ctx;
783 int i,ret=0;
784 unsigned int n;
785
786 EVP_MD_CTX_init(&ctx);
787 for (i=0; i<3; i++)
788 {
789 EVP_DigestInit_ex(&ctx,s->ctx->sha1, NULL);
790 EVP_DigestUpdate(&ctx,salt[i],strlen((const char *)salt[i]));
791 EVP_DigestUpdate(&ctx,p,len);
792 EVP_DigestUpdate(&ctx,&(s->s3->client_random[0]),
793 SSL3_RANDOM_SIZE);
794 EVP_DigestUpdate(&ctx,&(s->s3->server_random[0]),
795 SSL3_RANDOM_SIZE);
796 EVP_DigestFinal_ex(&ctx,buf,&n);
797
798 EVP_DigestInit_ex(&ctx,s->ctx->md5, NULL);
799 EVP_DigestUpdate(&ctx,p,len);
800 EVP_DigestUpdate(&ctx,buf,n);
801 EVP_DigestFinal_ex(&ctx,out,&n);
802 out+=n;
803 ret+=n;
804 }
805 EVP_MD_CTX_cleanup(&ctx);
806 return(ret);
807 }
808
809int ssl3_alert_code(int code)
810 {
811 switch (code)
812 {
813 case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY);
814 case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
815 case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC);
816 case SSL_AD_DECRYPTION_FAILED: return(SSL3_AD_BAD_RECORD_MAC);
817 case SSL_AD_RECORD_OVERFLOW: return(SSL3_AD_BAD_RECORD_MAC);
818 case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
819 case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE);
820 case SSL_AD_NO_CERTIFICATE: return(SSL3_AD_NO_CERTIFICATE);
821 case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE);
822 case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
823 case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
824 case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
825 case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
826 case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER);
827 case SSL_AD_UNKNOWN_CA: return(SSL3_AD_BAD_CERTIFICATE);
828 case SSL_AD_ACCESS_DENIED: return(SSL3_AD_HANDSHAKE_FAILURE);
829 case SSL_AD_DECODE_ERROR: return(SSL3_AD_HANDSHAKE_FAILURE);
830 case SSL_AD_DECRYPT_ERROR: return(SSL3_AD_HANDSHAKE_FAILURE);
831 case SSL_AD_EXPORT_RESTRICTION: return(SSL3_AD_HANDSHAKE_FAILURE);
832 case SSL_AD_PROTOCOL_VERSION: return(SSL3_AD_HANDSHAKE_FAILURE);
833 case SSL_AD_INSUFFICIENT_SECURITY:return(SSL3_AD_HANDSHAKE_FAILURE);
834 case SSL_AD_INTERNAL_ERROR: return(SSL3_AD_HANDSHAKE_FAILURE);
835 case SSL_AD_USER_CANCELLED: return(SSL3_AD_HANDSHAKE_FAILURE);
836 case SSL_AD_NO_RENEGOTIATION: return(-1); /* Don't send it :-) */
919b01cc
PA
837 case SSL_AD_UNSUPPORTED_EXTENSION: return(SSL3_AD_HANDSHAKE_FAILURE);
838 case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(SSL3_AD_HANDSHAKE_FAILURE);
839 case SSL_AD_UNRECOGNIZED_NAME: return(SSL3_AD_HANDSHAKE_FAILURE);
840 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(SSL3_AD_HANDSHAKE_FAILURE);
841 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(SSL3_AD_HANDSHAKE_FAILURE);
842 case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY);
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843 default: return(-1);
844 }
845 }
846