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1/* ssl/t1_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/* ====================================================================
59 * Copyright (c) 1998-2007 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 * 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 */
137
138#include <stdio.h>
139#include "ssl_locl.h"
140#ifndef OPENSSL_NO_COMP
141#include <openssl/comp.h>
142#endif
143#include <openssl/evp.h>
144#include <openssl/hmac.h>
145#include <openssl/md5.h>
146#ifdef KSSL_DEBUG
147#include <openssl/des.h>
148#endif
149
150/* seed1 through seed5 are virtually concatenated */
151static int tls1_P_hash(const EVP_MD *md, const unsigned char *sec,
152 int sec_len,
153 const void *seed1, int seed1_len,
154 const void *seed2, int seed2_len,
155 const void *seed3, int seed3_len,
156 const void *seed4, int seed4_len,
157 const void *seed5, int seed5_len,
158 unsigned char *out, int olen)
159 {
160 int chunk;
161 unsigned int j;
162 HMAC_CTX ctx;
163 HMAC_CTX ctx_tmp;
164 unsigned char A1[EVP_MAX_MD_SIZE];
165 unsigned int A1_len;
166 int ret = 0;
167
168 chunk=EVP_MD_size(md);
169 OPENSSL_assert(chunk >= 0);
170
171 HMAC_CTX_init(&ctx);
172 HMAC_CTX_init(&ctx_tmp);
173 if (!HMAC_Init_ex(&ctx,sec,sec_len,md, NULL))
174 goto err;
175 if (!HMAC_Init_ex(&ctx_tmp,sec,sec_len,md, NULL))
176 goto err;
177 if (seed1 != NULL && !HMAC_Update(&ctx,seed1,seed1_len))
178 goto err;
179 if (seed2 != NULL && !HMAC_Update(&ctx,seed2,seed2_len))
180 goto err;
181 if (seed3 != NULL && !HMAC_Update(&ctx,seed3,seed3_len))
182 goto err;
183 if (seed4 != NULL && !HMAC_Update(&ctx,seed4,seed4_len))
184 goto err;
185 if (seed5 != NULL && !HMAC_Update(&ctx,seed5,seed5_len))
186 goto err;
187 if (!HMAC_Final(&ctx,A1,&A1_len))
188 goto err;
189
190 for (;;)
191 {
192 if (!HMAC_Init_ex(&ctx,NULL,0,NULL,NULL)) /* re-init */
193 goto err;
194 if (!HMAC_Init_ex(&ctx_tmp,NULL,0,NULL,NULL)) /* re-init */
195 goto err;
196 if (!HMAC_Update(&ctx,A1,A1_len))
197 goto err;
198 if (!HMAC_Update(&ctx_tmp,A1,A1_len))
199 goto err;
200 if (seed1 != NULL && !HMAC_Update(&ctx,seed1,seed1_len))
201 goto err;
202 if (seed2 != NULL && !HMAC_Update(&ctx,seed2,seed2_len))
203 goto err;
204 if (seed3 != NULL && !HMAC_Update(&ctx,seed3,seed3_len))
205 goto err;
206 if (seed4 != NULL && !HMAC_Update(&ctx,seed4,seed4_len))
207 goto err;
208 if (seed5 != NULL && !HMAC_Update(&ctx,seed5,seed5_len))
209 goto err;
210
211 if (olen > chunk)
212 {
213 if (!HMAC_Final(&ctx,out,&j))
214 goto err;
215 out+=j;
216 olen-=j;
217 if (!HMAC_Final(&ctx_tmp,A1,&A1_len)) /* calc the next A1 value */
218 goto err;
219 }
220 else /* last one */
221 {
222 if (!HMAC_Final(&ctx,A1,&A1_len))
223 goto err;
224 memcpy(out,A1,olen);
225 break;
226 }
227 }
228 ret = 1;
229err:
230 HMAC_CTX_cleanup(&ctx);
231 HMAC_CTX_cleanup(&ctx_tmp);
232 OPENSSL_cleanse(A1,sizeof(A1));
233 return ret;
234 }
235
236/* seed1 through seed5 are virtually concatenated */
237static int tls1_PRF(long digest_mask,
238 const void *seed1, int seed1_len,
239 const void *seed2, int seed2_len,
240 const void *seed3, int seed3_len,
241 const void *seed4, int seed4_len,
242 const void *seed5, int seed5_len,
243 const unsigned char *sec, int slen,
244 unsigned char *out1,
245 unsigned char *out2, int olen)
246 {
247 int len,i,idx,count;
248 const unsigned char *S1;
249 long m;
250 const EVP_MD *md;
251 int ret = 0;
252
253 /* Count number of digests and partition sec evenly */
254 count=0;
255 for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
256 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) count++;
257 }
258 len=slen/count;
259 S1=sec;
260 memset(out1,0,olen);
261 for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
262 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) {
263 if (!md) {
264 SSLerr(SSL_F_TLS1_PRF,
265 SSL_R_UNSUPPORTED_DIGEST_TYPE);
266 goto err;
267 }
268 if (!tls1_P_hash(md ,S1,len+(slen&1),
269 seed1,seed1_len,seed2,seed2_len,seed3,seed3_len,seed4,seed4_len,seed5,seed5_len,
270 out2,olen))
271 goto err;
272 S1+=len;
273 for (i=0; i<olen; i++)
274 {
275 out1[i]^=out2[i];
276 }
277 }
278 }
279 ret = 1;
280err:
281 return ret;
282}
283static int tls1_generate_key_block(SSL *s, unsigned char *km,
284 unsigned char *tmp, int num)
285 {
286 int ret;
287 ret = tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
288 TLS_MD_KEY_EXPANSION_CONST,TLS_MD_KEY_EXPANSION_CONST_SIZE,
289 s->s3->server_random,SSL3_RANDOM_SIZE,
290 s->s3->client_random,SSL3_RANDOM_SIZE,
291 NULL,0,NULL,0,
292 s->session->master_key,s->session->master_key_length,
293 km,tmp,num);
294#ifdef KSSL_DEBUG
295 printf("tls1_generate_key_block() ==> %d byte master_key =\n\t",
296 s->session->master_key_length);
297 {
298 int i;
299 for (i=0; i < s->session->master_key_length; i++)
300 {
301 printf("%02X", s->session->master_key[i]);
302 }
303 printf("\n"); }
304#endif /* KSSL_DEBUG */
305 return ret;
306 }
307
308int tls1_change_cipher_state(SSL *s, int which)
309 {
310 static const unsigned char empty[]="";
311 unsigned char *p,*mac_secret;
312 unsigned char *exp_label;
313 unsigned char tmp1[EVP_MAX_KEY_LENGTH];
314 unsigned char tmp2[EVP_MAX_KEY_LENGTH];
315 unsigned char iv1[EVP_MAX_IV_LENGTH*2];
316 unsigned char iv2[EVP_MAX_IV_LENGTH*2];
317 unsigned char *ms,*key,*iv;
318 int client_write;
319 EVP_CIPHER_CTX *dd;
320 const EVP_CIPHER *c;
321#ifndef OPENSSL_NO_COMP
322 const SSL_COMP *comp;
323#endif
324 const EVP_MD *m;
325 int mac_type;
326 int *mac_secret_size;
327 EVP_MD_CTX *mac_ctx;
328 EVP_PKEY *mac_key;
329 int is_export,n,i,j,k,exp_label_len,cl;
330 int reuse_dd = 0;
331
332 is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
333 c=s->s3->tmp.new_sym_enc;
334 m=s->s3->tmp.new_hash;
335 mac_type = s->s3->tmp.new_mac_pkey_type;
336#ifndef OPENSSL_NO_COMP
337 comp=s->s3->tmp.new_compression;
338#endif
339
340#ifdef KSSL_DEBUG
341 printf("tls1_change_cipher_state(which= %d) w/\n", which);
342 printf("\talg= %ld/%ld, comp= %p\n",
343 s->s3->tmp.new_cipher->algorithm_mkey,
344 s->s3->tmp.new_cipher->algorithm_auth,
345 comp);
346 printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c);
347 printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
348 c->nid,c->block_size,c->key_len,c->iv_len);
349 printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length);
350 {
351 int i;
352 for (i=0; i<s->s3->tmp.key_block_length; i++)
353 printf("%02x", key_block[i]); printf("\n");
354 }
355#endif /* KSSL_DEBUG */
356
357 if (which & SSL3_CC_READ)
358 {
359 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
360 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
361 else
362 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
363
364 if (s->enc_read_ctx != NULL)
365 reuse_dd = 1;
366 else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
367 goto err;
368 else
369 /* make sure it's intialized in case we exit later with an error */
370 EVP_CIPHER_CTX_init(s->enc_read_ctx);
371 dd= s->enc_read_ctx;
372 mac_ctx=ssl_replace_hash(&s->read_hash,NULL);
373#ifndef OPENSSL_NO_COMP
374 if (s->expand != NULL)
375 {
376 COMP_CTX_free(s->expand);
377 s->expand=NULL;
378 }
379 if (comp != NULL)
380 {
381 s->expand=COMP_CTX_new(comp->method);
382 if (s->expand == NULL)
383 {
384 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
385 goto err2;
386 }
387 if (s->s3->rrec.comp == NULL)
388 s->s3->rrec.comp=(unsigned char *)
389 OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
390 if (s->s3->rrec.comp == NULL)
391 goto err;
392 }
393#endif
394 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
395 if (s->version != DTLS1_VERSION)
396 memset(&(s->s3->read_sequence[0]),0,8);
397 mac_secret= &(s->s3->read_mac_secret[0]);
398 mac_secret_size=&(s->s3->read_mac_secret_size);
399 }
400 else
401 {
402 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
403 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
404 else
405 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
406 if (s->enc_write_ctx != NULL)
407 reuse_dd = 1;
408 else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
409 goto err;
410 else
411 /* make sure it's intialized in case we exit later with an error */
412 EVP_CIPHER_CTX_init(s->enc_write_ctx);
413 dd= s->enc_write_ctx;
414 mac_ctx = ssl_replace_hash(&s->write_hash,NULL);
415#ifndef OPENSSL_NO_COMP
416 if (s->compress != NULL)
417 {
418 COMP_CTX_free(s->compress);
419 s->compress=NULL;
420 }
421 if (comp != NULL)
422 {
423 s->compress=COMP_CTX_new(comp->method);
424 if (s->compress == NULL)
425 {
426 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
427 goto err2;
428 }
429 }
430#endif
431 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
432 if (s->version != DTLS1_VERSION)
433 memset(&(s->s3->write_sequence[0]),0,8);
434 mac_secret= &(s->s3->write_mac_secret[0]);
435 mac_secret_size = &(s->s3->write_mac_secret_size);
436 }
437
438 if (reuse_dd)
439 EVP_CIPHER_CTX_cleanup(dd);
440
441 p=s->s3->tmp.key_block;
442 i=*mac_secret_size=s->s3->tmp.new_mac_secret_size;
443
444 cl=EVP_CIPHER_key_length(c);
445 j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
446 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
447 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
448 k=EVP_CIPHER_iv_length(c);
449 if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
450 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
451 {
452 ms= &(p[ 0]); n=i+i;
453 key= &(p[ n]); n+=j+j;
454 iv= &(p[ n]); n+=k+k;
455 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
456 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
457 client_write=1;
458 }
459 else
460 {
461 n=i;
462 ms= &(p[ n]); n+=i+j;
463 key= &(p[ n]); n+=j+k;
464 iv= &(p[ n]); n+=k;
465 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
466 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
467 client_write=0;
468 }
469
470 if (n > s->s3->tmp.key_block_length)
471 {
472 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
473 goto err2;
474 }
475
476 memcpy(mac_secret,ms,i);
477 mac_key = EVP_PKEY_new_mac_key(mac_type, NULL,
478 mac_secret,*mac_secret_size);
479 EVP_DigestSignInit(mac_ctx,NULL,m,NULL,mac_key);
480 EVP_PKEY_free(mac_key);
481#ifdef TLS_DEBUG
482printf("which = %04X\nmac key=",which);
483{ int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
484#endif
485 if (is_export)
486 {
487 /* In here I set both the read and write key/iv to the
488 * same value since only the correct one will be used :-).
489 */
490 if (!tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
491 exp_label,exp_label_len,
492 s->s3->client_random,SSL3_RANDOM_SIZE,
493 s->s3->server_random,SSL3_RANDOM_SIZE,
494 NULL,0,NULL,0,
495 key,j,tmp1,tmp2,EVP_CIPHER_key_length(c)))
496 goto err2;
497 key=tmp1;
498
499 if (k > 0)
500 {
501 if (!tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
502 TLS_MD_IV_BLOCK_CONST,TLS_MD_IV_BLOCK_CONST_SIZE,
503 s->s3->client_random,SSL3_RANDOM_SIZE,
504 s->s3->server_random,SSL3_RANDOM_SIZE,
505 NULL,0,NULL,0,
506 empty,0,iv1,iv2,k*2))
507 goto err2;
508 if (client_write)
509 iv=iv1;
510 else
511 iv= &(iv1[k]);
512 }
513 }
514
515 s->session->key_arg_length=0;
516#ifdef KSSL_DEBUG
517 {
518 int i;
519 printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n");
520 printf("\tkey= "); for (i=0; i<c->key_len; i++) printf("%02x", key[i]);
521 printf("\n");
522 printf("\t iv= "); for (i=0; i<c->iv_len; i++) printf("%02x", iv[i]);
523 printf("\n");
524 }
525#endif /* KSSL_DEBUG */
526
527 EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
528#ifdef TLS_DEBUG
529printf("which = %04X\nkey=",which);
530{ int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
531printf("\niv=");
532{ int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
533printf("\n");
534#endif
535
536 OPENSSL_cleanse(tmp1,sizeof(tmp1));
537 OPENSSL_cleanse(tmp2,sizeof(tmp1));
538 OPENSSL_cleanse(iv1,sizeof(iv1));
539 OPENSSL_cleanse(iv2,sizeof(iv2));
540 return(1);
541err:
542 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
543err2:
544 return(0);
545 }
546
547int tls1_setup_key_block(SSL *s)
548 {
549 unsigned char *p1,*p2=NULL;
550 const EVP_CIPHER *c;
551 const EVP_MD *hash;
552 int num;
553 SSL_COMP *comp;
554 int mac_type= NID_undef,mac_secret_size=0;
555 int ret=0;
556
557#ifdef KSSL_DEBUG
558 printf ("tls1_setup_key_block()\n");
559#endif /* KSSL_DEBUG */
560
561 if (s->s3->tmp.key_block_length != 0)
562 return(1);
563
564 if (!ssl_cipher_get_evp(s->session,&c,&hash,&mac_type,&mac_secret_size,&comp))
565 {
566 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
567 return(0);
568 }
569
570 s->s3->tmp.new_sym_enc=c;
571 s->s3->tmp.new_hash=hash;
572 s->s3->tmp.new_mac_pkey_type = mac_type;
573 s->s3->tmp.new_mac_secret_size = mac_secret_size;
574 num=EVP_CIPHER_key_length(c)+mac_secret_size+EVP_CIPHER_iv_length(c);
575 num*=2;
576
577 ssl3_cleanup_key_block(s);
578
579 if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL)
580 {
581 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
582 goto err;
583 }
584
585 s->s3->tmp.key_block_length=num;
586 s->s3->tmp.key_block=p1;
587
588 if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL)
589 {
590 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
591 goto err;
592 }
593
594#ifdef TLS_DEBUG
595printf("client random\n");
596{ int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
597printf("server random\n");
598{ int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
599printf("pre-master\n");
600{ int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
601#endif
602 if (!tls1_generate_key_block(s,p1,p2,num))
603 goto err;
604#ifdef TLS_DEBUG
605printf("\nkey block\n");
606{ int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
607#endif
608
609 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
610 {
611 /* enable vulnerability countermeasure for CBC ciphers with
612 * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
613 */
614 s->s3->need_empty_fragments = 1;
615
616 if (s->session->cipher != NULL)
617 {
618 if (s->session->cipher->algorithm_enc == SSL_eNULL)
619 s->s3->need_empty_fragments = 0;
620
621#ifndef OPENSSL_NO_RC4
622 if (s->session->cipher->algorithm_enc == SSL_RC4)
623 s->s3->need_empty_fragments = 0;
624#endif
625 }
626 }
627
628 ret = 1;
629err:
630 if (p2)
631 {
632 OPENSSL_cleanse(p2,num);
633 OPENSSL_free(p2);
634 }
635 return(ret);
636 }
637
638int tls1_enc(SSL *s, int send)
639 {
640 SSL3_RECORD *rec;
641 EVP_CIPHER_CTX *ds;
642 unsigned long l;
643 int bs,i,ii,j,k,n=0;
644 const EVP_CIPHER *enc;
645
646 if (send)
647 {
648 if (EVP_MD_CTX_md(s->write_hash))
649 {
650 n=EVP_MD_CTX_size(s->write_hash);
651 OPENSSL_assert(n >= 0);
652 }
653 ds=s->enc_write_ctx;
654 rec= &(s->s3->wrec);
655 if (s->enc_write_ctx == NULL)
656 enc=NULL;
657 else
658 enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
659 }
660 else
661 {
662 if (EVP_MD_CTX_md(s->read_hash))
663 {
664 n=EVP_MD_CTX_size(s->read_hash);
665 OPENSSL_assert(n >= 0);
666 }
667 ds=s->enc_read_ctx;
668 rec= &(s->s3->rrec);
669 if (s->enc_read_ctx == NULL)
670 enc=NULL;
671 else
672 enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
673 }
674
675#ifdef KSSL_DEBUG
676 printf("tls1_enc(%d)\n", send);
677#endif /* KSSL_DEBUG */
678
679 if ((s->session == NULL) || (ds == NULL) ||
680 (enc == NULL))
681 {
682 memmove(rec->data,rec->input,rec->length);
683 rec->input=rec->data;
684 }
685 else
686 {
687 l=rec->length;
688 bs=EVP_CIPHER_block_size(ds->cipher);
689
690 if ((bs != 1) && send)
691 {
692 i=bs-((int)l%bs);
693
694 /* Add weird padding of upto 256 bytes */
695
696 /* we need to add 'i' padding bytes of value j */
697 j=i-1;
698 if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
699 {
700 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
701 j++;
702 }
703 for (k=(int)l; k<(int)(l+i); k++)
704 rec->input[k]=j;
705 l+=i;
706 rec->length+=i;
707 }
708
709#ifdef KSSL_DEBUG
710 {
711 unsigned long ui;
712 printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
713 ds,rec->data,rec->input,l);
714 printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n",
715 ds->buf_len, ds->cipher->key_len,
716 DES_KEY_SZ, DES_SCHEDULE_SZ,
717 ds->cipher->iv_len);
718 printf("\t\tIV: ");
719 for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]);
720 printf("\n");
721 printf("\trec->input=");
722 for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]);
723 printf("\n");
724 }
725#endif /* KSSL_DEBUG */
726
727 if (!send)
728 {
729 if (l == 0 || l%bs != 0)
730 {
731 SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
732 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
733 return 0;
734 }
735 }
736
737 EVP_Cipher(ds,rec->data,rec->input,l);
738
739#ifdef KSSL_DEBUG
740 {
741 unsigned long i;
742 printf("\trec->data=");
743 for (i=0; i<l; i++)
744 printf(" %02x", rec->data[i]); printf("\n");
745 }
746#endif /* KSSL_DEBUG */
747
748 if ((bs != 1) && !send)
749 {
750 ii=i=rec->data[l-1]; /* padding_length */
751 i++;
752 /* NB: if compression is in operation the first packet
753 * may not be of even length so the padding bug check
754 * cannot be performed. This bug workaround has been
755 * around since SSLeay so hopefully it is either fixed
756 * now or no buggy implementation supports compression
757 * [steve]
758 */
759 if ( (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG)
760 && !s->expand)
761 {
762 /* First packet is even in size, so check */
763 if ((memcmp(s->s3->read_sequence,
764 "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1))
765 s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG;
766 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
767 i--;
768 }
769 /* TLS 1.0 does not bound the number of padding bytes by the block size.
770 * All of them must have value 'padding_length'. */
771 if (i > (int)rec->length)
772 {
773 /* Incorrect padding. SSLerr() and ssl3_alert are done
774 * by caller: we don't want to reveal whether this is
775 * a decryption error or a MAC verification failure
776 * (see http://www.openssl.org/~bodo/tls-cbc.txt) */
777 return -1;
778 }
779 for (j=(int)(l-i); j<(int)l; j++)
780 {
781 if (rec->data[j] != ii)
782 {
783 /* Incorrect padding */
784 return -1;
785 }
786 }
787 rec->length-=i;
788 }
789 }
790 return(1);
791 }
792int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out)
793 {
794 unsigned int ret;
795 EVP_MD_CTX ctx, *d=NULL;
796 int i;
797
798 if (s->s3->handshake_buffer)
799 if (!ssl3_digest_cached_records(s))
800 return 0;
801
802 for (i=0;i<SSL_MAX_DIGEST;i++)
803 {
804 if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid)
805 {
806 d=s->s3->handshake_dgst[i];
807 break;
808 }
809 }
810 if (!d) {
811 SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC,SSL_R_NO_REQUIRED_DIGEST);
812 return 0;
813 }
814
815 EVP_MD_CTX_init(&ctx);
816 EVP_MD_CTX_copy_ex(&ctx,d);
817 EVP_DigestFinal_ex(&ctx,out,&ret);
818 EVP_MD_CTX_cleanup(&ctx);
819 return((int)ret);
820 }
821
822int tls1_final_finish_mac(SSL *s,
823 const char *str, int slen, unsigned char *out)
824 {
825 unsigned int i;
826 EVP_MD_CTX ctx;
827 unsigned char buf[2*EVP_MAX_MD_SIZE];
828 unsigned char *q,buf2[12];
829 int idx;
830 long mask;
831 int err=0;
832 const EVP_MD *md;
833
834 q=buf;
835
836 if (s->s3->handshake_buffer)
837 if (!ssl3_digest_cached_records(s))
838 return 0;
839
840 EVP_MD_CTX_init(&ctx);
841
842 for (idx=0;ssl_get_handshake_digest(idx,&mask,&md);idx++)
843 {
844 if (mask & s->s3->tmp.new_cipher->algorithm2)
845 {
846 int hashsize = EVP_MD_size(md);
847 if (hashsize < 0 || hashsize > (int)(sizeof buf - (size_t)(q-buf)))
848 {
849 /* internal error: 'buf' is too small for this cipersuite! */
850 err = 1;
851 }
852 else
853 {
854 EVP_MD_CTX_copy_ex(&ctx,s->s3->handshake_dgst[idx]);
855 EVP_DigestFinal_ex(&ctx,q,&i);
856 if (i != (unsigned int)hashsize) /* can't really happen */
857 err = 1;
858 q+=i;
859 }
860 }
861 }
862
863 if (!tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
864 str,slen, buf,(int)(q-buf), NULL,0, NULL,0, NULL,0,
865 s->session->master_key,s->session->master_key_length,
866 out,buf2,sizeof buf2))
867 err = 1;
868 EVP_MD_CTX_cleanup(&ctx);
869
870 if (err)
871 return 0;
872 else
873 return sizeof buf2;
874 }
875
876int tls1_mac(SSL *ssl, unsigned char *md, int send)
877 {
878 SSL3_RECORD *rec;
879 unsigned char *seq;
880 EVP_MD_CTX *hash;
881 size_t md_size;
882 int i;
883 EVP_MD_CTX hmac, *mac_ctx;
884 unsigned char buf[5];
885 int stream_mac = (send?(ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM):(ssl->mac_flags&SSL_MAC_FLAG_READ_MAC_STREAM));
886 int t;
887
888 if (send)
889 {
890 rec= &(ssl->s3->wrec);
891 seq= &(ssl->s3->write_sequence[0]);
892 hash=ssl->write_hash;
893 }
894 else
895 {
896 rec= &(ssl->s3->rrec);
897 seq= &(ssl->s3->read_sequence[0]);
898 hash=ssl->read_hash;
899 }
900
901 t=EVP_MD_CTX_size(hash);
902 OPENSSL_assert(t >= 0);
903 md_size=t;
904
905 buf[0]=rec->type;
906 buf[1]=(unsigned char)(ssl->version>>8);
907 buf[2]=(unsigned char)(ssl->version);
908 buf[3]=rec->length>>8;
909 buf[4]=rec->length&0xff;
910
911 /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
912 if (stream_mac)
913 {
914 mac_ctx = hash;
915 }
916 else
917 {
918 EVP_MD_CTX_copy(&hmac,hash);
919 mac_ctx = &hmac;
920 }
921
922 if (ssl->version == DTLS1_VERSION || ssl->version == DTLS1_BAD_VER)
923 {
924 unsigned char dtlsseq[8],*p=dtlsseq;
925
926 s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p);
927 memcpy (p,&seq[2],6);
928
929 EVP_DigestSignUpdate(mac_ctx,dtlsseq,8);
930 }
931 else
932 EVP_DigestSignUpdate(mac_ctx,seq,8);
933
934 EVP_DigestSignUpdate(mac_ctx,buf,5);
935 EVP_DigestSignUpdate(mac_ctx,rec->input,rec->length);
936 t=EVP_DigestSignFinal(mac_ctx,md,&md_size);
937 OPENSSL_assert(t > 0);
938
939 if (!stream_mac) EVP_MD_CTX_cleanup(&hmac);
940#ifdef TLS_DEBUG
941printf("sec=");
942{unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); }
943printf("seq=");
944{int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
945printf("buf=");
946{int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); }
947printf("rec=");
948{unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
949#endif
950
951 if (ssl->version != DTLS1_VERSION && ssl->version != DTLS1_BAD_VER)
952 {
953 for (i=7; i>=0; i--)
954 {
955 ++seq[i];
956 if (seq[i] != 0) break;
957 }
958 }
959
960#ifdef TLS_DEBUG
961{unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
962#endif
963 return(md_size);
964 }
965
966int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
967 int len)
968 {
969 unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
970 const void *co = NULL, *so = NULL;
971 int col = 0, sol = 0;
972
973#ifdef KSSL_DEBUG
974 printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len);
975#endif /* KSSL_DEBUG */
976
977#ifdef TLSEXT_TYPE_opaque_prf_input
978 if (s->s3->client_opaque_prf_input != NULL && s->s3->server_opaque_prf_input != NULL &&
979 s->s3->client_opaque_prf_input_len > 0 &&
980 s->s3->client_opaque_prf_input_len == s->s3->server_opaque_prf_input_len)
981 {
982 co = s->s3->client_opaque_prf_input;
983 col = s->s3->server_opaque_prf_input_len;
984 so = s->s3->server_opaque_prf_input;
985 sol = s->s3->client_opaque_prf_input_len; /* must be same as col (see draft-rescorla-tls-opaque-prf-input-00.txt, section 3.1) */
986 }
987#endif
988
989 tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
990 TLS_MD_MASTER_SECRET_CONST,TLS_MD_MASTER_SECRET_CONST_SIZE,
991 s->s3->client_random,SSL3_RANDOM_SIZE,
992 co, col,
993 s->s3->server_random,SSL3_RANDOM_SIZE,
994 so, sol,
995 p,len,
996 s->session->master_key,buff,sizeof buff);
997
998#ifdef KSSL_DEBUG
999 printf ("tls1_generate_master_secret() complete\n");
1000#endif /* KSSL_DEBUG */
1001 return(SSL3_MASTER_SECRET_SIZE);
1002 }
1003
1004int tls1_alert_code(int code)
1005 {
1006 switch (code)
1007 {
1008 case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY);
1009 case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
1010 case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC);
1011 case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED);
1012 case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW);
1013 case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
1014 case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE);
1015 case SSL_AD_NO_CERTIFICATE: return(-1);
1016 case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE);
1017 case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
1018 case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
1019 case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
1020 case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
1021 case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER);
1022 case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA);
1023 case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED);
1024 case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR);
1025 case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR);
1026 case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION);
1027 case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION);
1028 case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
1029 case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR);
1030 case SSL_AD_USER_CANCELLED: return(TLS1_AD_USER_CANCELLED);
1031 case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION);
1032 case SSL_AD_UNSUPPORTED_EXTENSION: return(TLS1_AD_UNSUPPORTED_EXTENSION);
1033 case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(TLS1_AD_CERTIFICATE_UNOBTAINABLE);
1034 case SSL_AD_UNRECOGNIZED_NAME: return(TLS1_AD_UNRECOGNIZED_NAME);
1035 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
1036 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE);
1037 case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY);
1038#if 0 /* not appropriate for TLS, not used for DTLS */
1039 case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return
1040 (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);
1041#endif
1042 default: return(-1);
1043 }
1044 }
1045
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-10-25 19:20:20 +0000