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 #include <openssl/rand.h>
147 #ifdef KSSL_DEBUG
148 #include <openssl/des.h>
149 #endif
150
151 /* seed1 through seed5 are virtually concatenated */
152 static int tls1_P_hash(const EVP_MD *md, const unsigned char *sec,
153 int sec_len,
154 const void *seed1, int seed1_len,
155 const void *seed2, int seed2_len,
156 const void *seed3, int seed3_len,
157 const void *seed4, int seed4_len,
158 const void *seed5, int seed5_len,
159 unsigned char *out, int olen)
160 {
161 int chunk;
162 size_t j;
163 EVP_MD_CTX ctx, ctx_tmp;
164 EVP_PKEY *mac_key;
165 unsigned char A1[EVP_MAX_MD_SIZE];
166 size_t A1_len;
167 int ret = 0;
168
169 chunk=EVP_MD_size(md);
170 OPENSSL_assert(chunk >= 0);
171
172 EVP_MD_CTX_init(&ctx);
173 EVP_MD_CTX_init(&ctx_tmp);
174 EVP_MD_CTX_set_flags(&ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
175 EVP_MD_CTX_set_flags(&ctx_tmp, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
176 mac_key = EVP_PKEY_new_mac_key(EVP_PKEY_HMAC, NULL, sec, sec_len);
177 if (!mac_key)
178 goto err;
179 if (!EVP_DigestSignInit(&ctx,NULL,md, NULL, mac_key))
180 goto err;
181 if (!EVP_DigestSignInit(&ctx_tmp,NULL,md, NULL, mac_key))
182 goto err;
183 if (seed1 && !EVP_DigestSignUpdate(&ctx,seed1,seed1_len))
184 goto err;
185 if (seed2 && !EVP_DigestSignUpdate(&ctx,seed2,seed2_len))
186 goto err;
187 if (seed3 && !EVP_DigestSignUpdate(&ctx,seed3,seed3_len))
188 goto err;
189 if (seed4 && !EVP_DigestSignUpdate(&ctx,seed4,seed4_len))
190 goto err;
191 if (seed5 && !EVP_DigestSignUpdate(&ctx,seed5,seed5_len))
192 goto err;
193 if (!EVP_DigestSignFinal(&ctx,A1,&A1_len))
194 goto err;
195
196 for (;;)
197 {
198 /* Reinit mac contexts */
199 if (!EVP_DigestSignInit(&ctx,NULL,md, NULL, mac_key))
200 goto err;
201 if (!EVP_DigestSignInit(&ctx_tmp,NULL,md, NULL, mac_key))
202 goto err;
203 if (!EVP_DigestSignUpdate(&ctx,A1,A1_len))
204 goto err;
205 if (!EVP_DigestSignUpdate(&ctx_tmp,A1,A1_len))
206 goto err;
207 if (seed1 && !EVP_DigestSignUpdate(&ctx,seed1,seed1_len))
208 goto err;
209 if (seed2 && !EVP_DigestSignUpdate(&ctx,seed2,seed2_len))
210 goto err;
211 if (seed3 && !EVP_DigestSignUpdate(&ctx,seed3,seed3_len))
212 goto err;
213 if (seed4 && !EVP_DigestSignUpdate(&ctx,seed4,seed4_len))
214 goto err;
215 if (seed5 && !EVP_DigestSignUpdate(&ctx,seed5,seed5_len))
216 goto err;
217
218 if (olen > chunk)
219 {
220 if (!EVP_DigestSignFinal(&ctx,out,&j))
221 goto err;
222 out+=j;
223 olen-=j;
224 /* calc the next A1 value */
225 if (!EVP_DigestSignFinal(&ctx_tmp,A1,&A1_len))
226 goto err;
227 }
228 else /* last one */
229 {
230 if (!EVP_DigestSignFinal(&ctx,A1,&A1_len))
231 goto err;
232 memcpy(out,A1,olen);
233 break;
234 }
235 }
236 ret = 1;
237 err:
238 EVP_PKEY_free(mac_key);
239 EVP_MD_CTX_cleanup(&ctx);
240 EVP_MD_CTX_cleanup(&ctx_tmp);
241 OPENSSL_cleanse(A1,sizeof(A1));
242 return ret;
243 }
244
245 /* seed1 through seed5 are virtually concatenated */
246 static int tls1_PRF(long digest_mask,
247 const void *seed1, int seed1_len,
248 const void *seed2, int seed2_len,
249 const void *seed3, int seed3_len,
250 const void *seed4, int seed4_len,
251 const void *seed5, int seed5_len,
252 const unsigned char *sec, int slen,
253 unsigned char *out1,
254 unsigned char *out2, int olen)
255 {
256 int len,i,idx,count;
257 const unsigned char *S1;
258 long m;
259 const EVP_MD *md;
260 int ret = 0;
261
262 /* Count number of digests and partition sec evenly */
263 count=0;
264 for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
265 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) count++;
266 }
267 len=slen/count;
268 if (count == 1)
269 slen = 0;
270 S1=sec;
271 memset(out1,0,olen);
272 for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
273 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) {
274 if (!md) {
275 SSLerr(SSL_F_TLS1_PRF,
276 SSL_R_UNSUPPORTED_DIGEST_TYPE);
277 goto err;
278 }
279 if (!tls1_P_hash(md ,S1,len+(slen&1),
280 seed1,seed1_len,seed2,seed2_len,seed3,seed3_len,seed4,seed4_len,seed5,seed5_len,
281 out2,olen))
282 goto err;
283 S1+=len;
284 for (i=0; i<olen; i++)
285 {
286 out1[i]^=out2[i];
287 }
288 }
289 }
290 ret = 1;
291 err:
292 return ret;
293 }
294 static int tls1_generate_key_block(SSL *s, unsigned char *km,
295 unsigned char *tmp, int num)
296 {
297 int ret;
298 ret = tls1_PRF(ssl_get_algorithm2(s),
299 TLS_MD_KEY_EXPANSION_CONST,TLS_MD_KEY_EXPANSION_CONST_SIZE,
300 s->s3->server_random,SSL3_RANDOM_SIZE,
301 s->s3->client_random,SSL3_RANDOM_SIZE,
302 NULL,0,NULL,0,
303 s->session->master_key,s->session->master_key_length,
304 km,tmp,num);
305 #ifdef KSSL_DEBUG
306 printf("tls1_generate_key_block() ==> %d byte master_key =\n\t",
307 s->session->master_key_length);
308 {
309 int i;
310 for (i=0; i < s->session->master_key_length; i++)
311 {
312 printf("%02X", s->session->master_key[i]);
313 }
314 printf("\n"); }
315 #endif /* KSSL_DEBUG */
316 return ret;
317 }
318
319 int tls1_change_cipher_state(SSL *s, int which)
320 {
321 static const unsigned char empty[]="";
322 unsigned char *p,*mac_secret;
323 unsigned char *exp_label;
324 unsigned char tmp1[EVP_MAX_KEY_LENGTH];
325 unsigned char tmp2[EVP_MAX_KEY_LENGTH];
326 unsigned char iv1[EVP_MAX_IV_LENGTH*2];
327 unsigned char iv2[EVP_MAX_IV_LENGTH*2];
328 unsigned char *ms,*key,*iv;
329 int client_write;
330 EVP_CIPHER_CTX *dd;
331 const EVP_CIPHER *c;
332 #ifndef OPENSSL_NO_COMP
333 const SSL_COMP *comp;
334 #endif
335 const EVP_MD *m;
336 int mac_type;
337 int *mac_secret_size;
338 EVP_MD_CTX *mac_ctx;
339 EVP_PKEY *mac_key;
340 int is_export,n,i,j,k,exp_label_len,cl;
341 int reuse_dd = 0;
342
343 is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
344 c=s->s3->tmp.new_sym_enc;
345 m=s->s3->tmp.new_hash;
346 mac_type = s->s3->tmp.new_mac_pkey_type;
347 #ifndef OPENSSL_NO_COMP
348 comp=s->s3->tmp.new_compression;
349 #endif
350
351 #ifdef KSSL_DEBUG
352 printf("tls1_change_cipher_state(which= %d) w/\n", which);
353 printf("\talg= %ld/%ld, comp= %p\n",
354 s->s3->tmp.new_cipher->algorithm_mkey,
355 s->s3->tmp.new_cipher->algorithm_auth,
356 comp);
357 printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c);
358 printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
359 c->nid,c->block_size,c->key_len,c->iv_len);
360 printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length);
361 {
362 int i;
363 for (i=0; i<s->s3->tmp.key_block_length; i++)
364 printf("%02x", s->s3->tmp.key_block[i]); printf("\n");
365 }
366 #endif /* KSSL_DEBUG */
367
368 if (which & SSL3_CC_READ)
369 {
370 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
371 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
372 else
373 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
374
375 if (s->enc_read_ctx != NULL)
376 reuse_dd = 1;
377 else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
378 goto err;
379 else
380 /* make sure it's intialized in case we exit later with an error */
381 EVP_CIPHER_CTX_init(s->enc_read_ctx);
382 dd= s->enc_read_ctx;
383 mac_ctx=ssl_replace_hash(&s->read_hash,NULL);
384 #ifndef OPENSSL_NO_COMP
385 if (s->expand != NULL)
386 {
387 COMP_CTX_free(s->expand);
388 s->expand=NULL;
389 }
390 if (comp != NULL)
391 {
392 s->expand=COMP_CTX_new(comp->method);
393 if (s->expand == NULL)
394 {
395 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
396 goto err2;
397 }
398 if (s->s3->rrec.comp == NULL)
399 s->s3->rrec.comp=(unsigned char *)
400 OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
401 if (s->s3->rrec.comp == NULL)
402 goto err;
403 }
404 #endif
405 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
406 if (s->version != DTLS1_VERSION)
407 memset(&(s->s3->read_sequence[0]),0,8);
408 mac_secret= &(s->s3->read_mac_secret[0]);
409 mac_secret_size=&(s->s3->read_mac_secret_size);
410 }
411 else
412 {
413 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
414 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
415 else
416 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
417 if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s))
418 reuse_dd = 1;
419 else if ((s->enc_write_ctx=EVP_CIPHER_CTX_new()) == NULL)
420 goto err;
421 dd= s->enc_write_ctx;
422 if (SSL_IS_DTLS(s))
423 {
424 mac_ctx = EVP_MD_CTX_create();
425 if (!mac_ctx)
426 goto err;
427 s->write_hash = mac_ctx;
428 }
429 else
430 mac_ctx = ssl_replace_hash(&s->write_hash,NULL);
431 #ifndef OPENSSL_NO_COMP
432 if (s->compress != NULL)
433 {
434 COMP_CTX_free(s->compress);
435 s->compress=NULL;
436 }
437 if (comp != NULL)
438 {
439 s->compress=COMP_CTX_new(comp->method);
440 if (s->compress == NULL)
441 {
442 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
443 goto err2;
444 }
445 }
446 #endif
447 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
448 if (s->version != DTLS1_VERSION)
449 memset(&(s->s3->write_sequence[0]),0,8);
450 mac_secret= &(s->s3->write_mac_secret[0]);
451 mac_secret_size = &(s->s3->write_mac_secret_size);
452 }
453
454 if (reuse_dd)
455 EVP_CIPHER_CTX_cleanup(dd);
456
457 p=s->s3->tmp.key_block;
458 i=*mac_secret_size=s->s3->tmp.new_mac_secret_size;
459
460 cl=EVP_CIPHER_key_length(c);
461 j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
462 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
463 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
464 /* If GCM mode only part of IV comes from PRF */
465 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
466 k = EVP_GCM_TLS_FIXED_IV_LEN;
467 else
468 k=EVP_CIPHER_iv_length(c);
469 if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
470 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
471 {
472 ms= &(p[ 0]); n=i+i;
473 key= &(p[ n]); n+=j+j;
474 iv= &(p[ n]); n+=k+k;
475 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
476 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
477 client_write=1;
478 }
479 else
480 {
481 n=i;
482 ms= &(p[ n]); n+=i+j;
483 key= &(p[ n]); n+=j+k;
484 iv= &(p[ n]); n+=k;
485 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
486 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
487 client_write=0;
488 }
489
490 if (n > s->s3->tmp.key_block_length)
491 {
492 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
493 goto err2;
494 }
495
496 memcpy(mac_secret,ms,i);
497
498 if (!(EVP_CIPHER_flags(c)&EVP_CIPH_FLAG_AEAD_CIPHER))
499 {
500 mac_key = EVP_PKEY_new_mac_key(mac_type, NULL,
501 mac_secret,*mac_secret_size);
502 EVP_DigestSignInit(mac_ctx,NULL,m,NULL,mac_key);
503 EVP_PKEY_free(mac_key);
504 }
505 #ifdef TLS_DEBUG
506 printf("which = %04X\nmac key=",which);
507 { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
508 #endif
509 if (is_export)
510 {
511 /* In here I set both the read and write key/iv to the
512 * same value since only the correct one will be used :-).
513 */
514 if (!tls1_PRF(ssl_get_algorithm2(s),
515 exp_label,exp_label_len,
516 s->s3->client_random,SSL3_RANDOM_SIZE,
517 s->s3->server_random,SSL3_RANDOM_SIZE,
518 NULL,0,NULL,0,
519 key,j,tmp1,tmp2,EVP_CIPHER_key_length(c)))
520 goto err2;
521 key=tmp1;
522
523 if (k > 0)
524 {
525 if (!tls1_PRF(ssl_get_algorithm2(s),
526 TLS_MD_IV_BLOCK_CONST,TLS_MD_IV_BLOCK_CONST_SIZE,
527 s->s3->client_random,SSL3_RANDOM_SIZE,
528 s->s3->server_random,SSL3_RANDOM_SIZE,
529 NULL,0,NULL,0,
530 empty,0,iv1,iv2,k*2))
531 goto err2;
532 if (client_write)
533 iv=iv1;
534 else
535 iv= &(iv1[k]);
536 }
537 }
538
539 s->session->key_arg_length=0;
540 #ifdef KSSL_DEBUG
541 {
542 int i;
543 printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n");
544 printf("\tkey= "); for (i=0; i<c->key_len; i++) printf("%02x", key[i]);
545 printf("\n");
546 printf("\t iv= "); for (i=0; i<c->iv_len; i++) printf("%02x", iv[i]);
547 printf("\n");
548 }
549 #endif /* KSSL_DEBUG */
550
551 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
552 {
553 EVP_CipherInit_ex(dd,c,NULL,key,NULL,(which & SSL3_CC_WRITE));
554 EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, k, iv);
555 }
556 else
557 EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
558
559 /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
560 if ((EVP_CIPHER_flags(c)&EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size)
561 EVP_CIPHER_CTX_ctrl(dd,EVP_CTRL_AEAD_SET_MAC_KEY,
562 *mac_secret_size,mac_secret);
563
564 #ifdef TLS_DEBUG
565 printf("which = %04X\nkey=",which);
566 { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
567 printf("\niv=");
568 { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
569 printf("\n");
570 #endif
571
572 OPENSSL_cleanse(tmp1,sizeof(tmp1));
573 OPENSSL_cleanse(tmp2,sizeof(tmp1));
574 OPENSSL_cleanse(iv1,sizeof(iv1));
575 OPENSSL_cleanse(iv2,sizeof(iv2));
576 return(1);
577 err:
578 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
579 err2:
580 return(0);
581 }
582
583 int tls1_setup_key_block(SSL *s)
584 {
585 unsigned char *p1,*p2=NULL;
586 const EVP_CIPHER *c;
587 const EVP_MD *hash;
588 int num;
589 SSL_COMP *comp;
590 int mac_type= NID_undef,mac_secret_size=0;
591 int ret=0;
592
593 #ifdef KSSL_DEBUG
594 printf ("tls1_setup_key_block()\n");
595 #endif /* KSSL_DEBUG */
596
597 if (s->s3->tmp.key_block_length != 0)
598 return(1);
599
600 if (!ssl_cipher_get_evp(s->session,&c,&hash,&mac_type,&mac_secret_size,&comp))
601 {
602 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
603 return(0);
604 }
605
606 s->s3->tmp.new_sym_enc=c;
607 s->s3->tmp.new_hash=hash;
608 s->s3->tmp.new_mac_pkey_type = mac_type;
609 s->s3->tmp.new_mac_secret_size = mac_secret_size;
610 num=EVP_CIPHER_key_length(c)+mac_secret_size+EVP_CIPHER_iv_length(c);
611 num*=2;
612
613 ssl3_cleanup_key_block(s);
614
615 if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL)
616 {
617 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
618 goto err;
619 }
620
621 s->s3->tmp.key_block_length=num;
622 s->s3->tmp.key_block=p1;
623
624 if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL)
625 {
626 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
627 goto err;
628 }
629
630 #ifdef TLS_DEBUG
631 printf("client random\n");
632 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
633 printf("server random\n");
634 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
635 printf("pre-master\n");
636 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
637 #endif
638 if (!tls1_generate_key_block(s,p1,p2,num))
639 goto err;
640 #ifdef TLS_DEBUG
641 printf("\nkey block\n");
642 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
643 #endif
644
645 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)
646 && s->method->version <= TLS1_VERSION)
647 {
648 /* enable vulnerability countermeasure for CBC ciphers with
649 * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
650 */
651 s->s3->need_empty_fragments = 1;
652
653 if (s->session->cipher != NULL)
654 {
655 if (s->session->cipher->algorithm_enc == SSL_eNULL)
656 s->s3->need_empty_fragments = 0;
657
658 #ifndef OPENSSL_NO_RC4
659 if (s->session->cipher->algorithm_enc == SSL_RC4)
660 s->s3->need_empty_fragments = 0;
661 #endif
662 }
663 }
664
665 ret = 1;
666 err:
667 if (p2)
668 {
669 OPENSSL_cleanse(p2,num);
670 OPENSSL_free(p2);
671 }
672 return(ret);
673 }
674
675 /* tls1_enc encrypts/decrypts the record in |s->wrec| / |s->rrec|, respectively.
676 *
677 * Returns:
678 * 0: (in non-constant time) if the record is publically invalid (i.e. too
679 * short etc).
680 * 1: if the record's padding is valid / the encryption was successful.
681 * -1: if the record's padding/AEAD-authenticator is invalid or, if sending,
682 * an internal error occured.
683 */
684 int tls1_enc(SSL *s, int send)
685 {
686 SSL3_RECORD *rec;
687 EVP_CIPHER_CTX *ds;
688 unsigned long l;
689 int bs,i,j,k,pad=0,ret,mac_size=0;
690 const EVP_CIPHER *enc;
691
692 if (send)
693 {
694 if (EVP_MD_CTX_md(s->write_hash))
695 {
696 int n=EVP_MD_CTX_size(s->write_hash);
697 OPENSSL_assert(n >= 0);
698 }
699 ds=s->enc_write_ctx;
700 rec= &(s->s3->wrec);
701 if (s->enc_write_ctx == NULL)
702 enc=NULL;
703 else
704 {
705 int ivlen;
706 enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
707 /* For TLSv1.1 and later explicit IV */
708 if (s->version >= TLS1_1_VERSION
709 && EVP_CIPHER_mode(enc) == EVP_CIPH_CBC_MODE)
710 ivlen = EVP_CIPHER_iv_length(enc);
711 else
712 ivlen = 0;
713 if (ivlen > 1)
714 {
715 if ( rec->data != rec->input)
716 /* we can't write into the input stream:
717 * Can this ever happen?? (steve)
718 */
719 fprintf(stderr,
720 "%s:%d: rec->data != rec->input\n",
721 __FILE__, __LINE__);
722 else if (RAND_bytes(rec->input, ivlen) <= 0)
723 return -1;
724 }
725 }
726 }
727 else
728 {
729 if (EVP_MD_CTX_md(s->read_hash))
730 {
731 int n=EVP_MD_CTX_size(s->read_hash);
732 OPENSSL_assert(n >= 0);
733 }
734 ds=s->enc_read_ctx;
735 rec= &(s->s3->rrec);
736 if (s->enc_read_ctx == NULL)
737 enc=NULL;
738 else
739 enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
740 }
741
742 #ifdef KSSL_DEBUG
743 printf("tls1_enc(%d)\n", send);
744 #endif /* KSSL_DEBUG */
745
746 if ((s->session == NULL) || (ds == NULL) || (enc == NULL))
747 {
748 memmove(rec->data,rec->input,rec->length);
749 rec->input=rec->data;
750 ret = 1;
751 }
752 else
753 {
754 l=rec->length;
755 bs=EVP_CIPHER_block_size(ds->cipher);
756
757 if (EVP_CIPHER_flags(ds->cipher)&EVP_CIPH_FLAG_AEAD_CIPHER)
758 {
759 unsigned char buf[13],*seq;
760
761 seq = send?s->s3->write_sequence:s->s3->read_sequence;
762
763 if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER)
764 {
765 unsigned char dtlsseq[9],*p=dtlsseq;
766
767 s2n(send?s->d1->w_epoch:s->d1->r_epoch,p);
768 memcpy(p,&seq[2],6);
769 memcpy(buf,dtlsseq,8);
770 }
771 else
772 {
773 memcpy(buf,seq,8);
774 for (i=7; i>=0; i--) /* increment */
775 {
776 ++seq[i];
777 if (seq[i] != 0) break;
778 }
779 }
780
781 buf[8]=rec->type;
782 buf[9]=(unsigned char)(s->version>>8);
783 buf[10]=(unsigned char)(s->version);
784 buf[11]=rec->length>>8;
785 buf[12]=rec->length&0xff;
786 pad=EVP_CIPHER_CTX_ctrl(ds,EVP_CTRL_AEAD_TLS1_AAD,13,buf);
787 if (send)
788 {
789 l+=pad;
790 rec->length+=pad;
791 }
792 }
793 else if ((bs != 1) && send)
794 {
795 i=bs-((int)l%bs);
796
797 /* Add weird padding of upto 256 bytes */
798
799 /* we need to add 'i' padding bytes of value j */
800 j=i-1;
801 if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
802 {
803 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
804 j++;
805 }
806 for (k=(int)l; k<(int)(l+i); k++)
807 rec->input[k]=j;
808 l+=i;
809 rec->length+=i;
810 }
811
812 #ifdef KSSL_DEBUG
813 {
814 unsigned long ui;
815 printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
816 ds,rec->data,rec->input,l);
817 printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n",
818 ds->buf_len, ds->cipher->key_len,
819 DES_KEY_SZ, DES_SCHEDULE_SZ,
820 ds->cipher->iv_len);
821 printf("\t\tIV: ");
822 for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]);
823 printf("\n");
824 printf("\trec->input=");
825 for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]);
826 printf("\n");
827 }
828 #endif /* KSSL_DEBUG */
829
830 if (!send)
831 {
832 if (l == 0 || l%bs != 0)
833 return 0;
834 }
835
836 i = EVP_Cipher(ds,rec->data,rec->input,l);
837 if ((EVP_CIPHER_flags(ds->cipher)&EVP_CIPH_FLAG_CUSTOM_CIPHER)
838 ?(i<0)
839 :(i==0))
840 return -1; /* AEAD can fail to verify MAC */
841 if (EVP_CIPHER_mode(enc) == EVP_CIPH_GCM_MODE && !send)
842 {
843 rec->data += EVP_GCM_TLS_EXPLICIT_IV_LEN;
844 rec->input += EVP_GCM_TLS_EXPLICIT_IV_LEN;
845 rec->length -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
846 }
847
848 #ifdef KSSL_DEBUG
849 {
850 unsigned long i;
851 printf("\trec->data=");
852 for (i=0; i<l; i++)
853 printf(" %02x", rec->data[i]); printf("\n");
854 }
855 #endif /* KSSL_DEBUG */
856
857 ret = 1;
858 if (EVP_MD_CTX_md(s->read_hash) != NULL)
859 mac_size = EVP_MD_CTX_size(s->read_hash);
860 if ((bs != 1) && !send)
861 ret = tls1_cbc_remove_padding(s, rec, bs, mac_size);
862 if (pad && !send)
863 rec->length -= pad;
864 }
865 return ret;
866 }
867
868 int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out)
869 {
870 unsigned int ret;
871 EVP_MD_CTX ctx, *d=NULL;
872 int i;
873
874 if (s->s3->handshake_buffer)
875 if (!ssl3_digest_cached_records(s))
876 return 0;
877
878 for (i=0;i<SSL_MAX_DIGEST;i++)
879 {
880 if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid)
881 {
882 d=s->s3->handshake_dgst[i];
883 break;
884 }
885 }
886 if (!d) {
887 SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC,SSL_R_NO_REQUIRED_DIGEST);
888 return 0;
889 }
890
891 EVP_MD_CTX_init(&ctx);
892 EVP_MD_CTX_copy_ex(&ctx,d);
893 EVP_DigestFinal_ex(&ctx,out,&ret);
894 EVP_MD_CTX_cleanup(&ctx);
895 return((int)ret);
896 }
897
898 int tls1_final_finish_mac(SSL *s,
899 const char *str, int slen, unsigned char *out)
900 {
901 unsigned int i;
902 EVP_MD_CTX ctx;
903 unsigned char buf[2*EVP_MAX_MD_SIZE];
904 unsigned char *q,buf2[12];
905 int idx;
906 long mask;
907 int err=0;
908 const EVP_MD *md;
909
910 q=buf;
911
912 if (s->s3->handshake_buffer)
913 if (!ssl3_digest_cached_records(s))
914 return 0;
915
916 EVP_MD_CTX_init(&ctx);
917
918 for (idx=0;ssl_get_handshake_digest(idx,&mask,&md);idx++)
919 {
920 if (mask & ssl_get_algorithm2(s))
921 {
922 int hashsize = EVP_MD_size(md);
923 EVP_MD_CTX *hdgst = s->s3->handshake_dgst[idx];
924 if (!hdgst || hashsize < 0 || hashsize > (int)(sizeof buf - (size_t)(q-buf)))
925 {
926 /* internal error: 'buf' is too small for this cipersuite! */
927 err = 1;
928 }
929 else
930 {
931 if (!EVP_MD_CTX_copy_ex(&ctx, hdgst) ||
932 !EVP_DigestFinal_ex(&ctx,q,&i) ||
933 (i != (unsigned int)hashsize))
934 err = 1;
935 q+=hashsize;
936 }
937 }
938 }
939
940 if (!tls1_PRF(ssl_get_algorithm2(s),
941 str,slen, buf,(int)(q-buf), NULL,0, NULL,0, NULL,0,
942 s->session->master_key,s->session->master_key_length,
943 out,buf2,sizeof buf2))
944 err = 1;
945 EVP_MD_CTX_cleanup(&ctx);
946
947 if (err)
948 return 0;
949 else
950 return sizeof buf2;
951 }
952
953 int tls1_mac(SSL *ssl, unsigned char *md, int send)
954 {
955 SSL3_RECORD *rec;
956 unsigned char *seq;
957 EVP_MD_CTX *hash;
958 size_t md_size, orig_len;
959 int i;
960 EVP_MD_CTX hmac, *mac_ctx;
961 unsigned char header[13];
962 int stream_mac = (send?(ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM):(ssl->mac_flags&SSL_MAC_FLAG_READ_MAC_STREAM));
963 int t;
964
965 if (send)
966 {
967 rec= &(ssl->s3->wrec);
968 seq= &(ssl->s3->write_sequence[0]);
969 hash=ssl->write_hash;
970 }
971 else
972 {
973 rec= &(ssl->s3->rrec);
974 seq= &(ssl->s3->read_sequence[0]);
975 hash=ssl->read_hash;
976 }
977
978 t=EVP_MD_CTX_size(hash);
979 OPENSSL_assert(t >= 0);
980 md_size=t;
981
982 /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
983 if (stream_mac)
984 {
985 mac_ctx = hash;
986 }
987 else
988 {
989 if (!EVP_MD_CTX_copy(&hmac,hash))
990 return -1;
991 mac_ctx = &hmac;
992 }
993
994 if (ssl->version == DTLS1_VERSION || ssl->version == DTLS1_BAD_VER)
995 {
996 unsigned char dtlsseq[8],*p=dtlsseq;
997
998 s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p);
999 memcpy (p,&seq[2],6);
1000
1001 memcpy(header, dtlsseq, 8);
1002 }
1003 else
1004 memcpy(header, seq, 8);
1005
1006 /* kludge: tls1_cbc_remove_padding passes padding length in rec->type */
1007 orig_len = rec->length+md_size+((unsigned int)rec->type>>8);
1008 rec->type &= 0xff;
1009
1010 header[8]=rec->type;
1011 header[9]=(unsigned char)(ssl->version>>8);
1012 header[10]=(unsigned char)(ssl->version);
1013 header[11]=(rec->length)>>8;
1014 header[12]=(rec->length)&0xff;
1015
1016 if (!send &&
1017 EVP_CIPHER_CTX_mode(ssl->enc_read_ctx) == EVP_CIPH_CBC_MODE &&
1018 ssl3_cbc_record_digest_supported(mac_ctx))
1019 {
1020 /* This is a CBC-encrypted record. We must avoid leaking any
1021 * timing-side channel information about how many blocks of
1022 * data we are hashing because that gives an attacker a
1023 * timing-oracle. */
1024 ssl3_cbc_digest_record(
1025 mac_ctx,
1026 md, &md_size,
1027 header, rec->input,
1028 rec->length + md_size, orig_len,
1029 ssl->s3->read_mac_secret,
1030 ssl->s3->read_mac_secret_size,
1031 0 /* not SSLv3 */);
1032 }
1033 else
1034 {
1035 EVP_DigestSignUpdate(mac_ctx,header,sizeof(header));
1036 EVP_DigestSignUpdate(mac_ctx,rec->input,rec->length);
1037 t=EVP_DigestSignFinal(mac_ctx,md,&md_size);
1038 OPENSSL_assert(t > 0);
1039 #ifdef OPENSSL_FIPS
1040 if (!send && FIPS_mode())
1041 tls_fips_digest_extra(
1042 ssl->enc_read_ctx,
1043 mac_ctx, rec->input,
1044 rec->length, orig_len);
1045 #endif
1046 }
1047
1048 if (!stream_mac)
1049 EVP_MD_CTX_cleanup(&hmac);
1050 #ifdef TLS_DEBUG
1051 printf("seq=");
1052 {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
1053 printf("rec=");
1054 {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",rec->data[z]); printf("\n"); }
1055 #endif
1056
1057 if (ssl->version != DTLS1_VERSION && ssl->version != DTLS1_BAD_VER)
1058 {
1059 for (i=7; i>=0; i--)
1060 {
1061 ++seq[i];
1062 if (seq[i] != 0) break;
1063 }
1064 }
1065
1066 #ifdef TLS_DEBUG
1067 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
1068 #endif
1069 return(md_size);
1070 }
1071
1072 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
1073 int len)
1074 {
1075 unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
1076 const void *co = NULL, *so = NULL;
1077 int col = 0, sol = 0;
1078
1079
1080 #ifdef KSSL_DEBUG
1081 printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len);
1082 #endif /* KSSL_DEBUG */
1083
1084 #ifdef TLSEXT_TYPE_opaque_prf_input
1085 if (s->s3->client_opaque_prf_input != NULL && s->s3->server_opaque_prf_input != NULL &&
1086 s->s3->client_opaque_prf_input_len > 0 &&
1087 s->s3->client_opaque_prf_input_len == s->s3->server_opaque_prf_input_len)
1088 {
1089 co = s->s3->client_opaque_prf_input;
1090 col = s->s3->server_opaque_prf_input_len;
1091 so = s->s3->server_opaque_prf_input;
1092 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) */
1093 }
1094 #endif
1095
1096 tls1_PRF(ssl_get_algorithm2(s),
1097 TLS_MD_MASTER_SECRET_CONST,TLS_MD_MASTER_SECRET_CONST_SIZE,
1098 s->s3->client_random,SSL3_RANDOM_SIZE,
1099 co, col,
1100 s->s3->server_random,SSL3_RANDOM_SIZE,
1101 so, sol,
1102 p,len,
1103 s->session->master_key,buff,sizeof buff);
1104 #ifdef SSL_DEBUG
1105 fprintf(stderr, "Premaster Secret:\n");
1106 BIO_dump_fp(stderr, (char *)p, len);
1107 fprintf(stderr, "Client Random:\n");
1108 BIO_dump_fp(stderr, (char *)s->s3->client_random, SSL3_RANDOM_SIZE);
1109 fprintf(stderr, "Server Random:\n");
1110 BIO_dump_fp(stderr, (char *)s->s3->server_random, SSL3_RANDOM_SIZE);
1111 fprintf(stderr, "Master Secret:\n");
1112 BIO_dump_fp(stderr, (char *)s->session->master_key, SSL3_MASTER_SECRET_SIZE);
1113 #endif
1114
1115 #ifdef KSSL_DEBUG
1116 printf ("tls1_generate_master_secret() complete\n");
1117 #endif /* KSSL_DEBUG */
1118 return(SSL3_MASTER_SECRET_SIZE);
1119 }
1120
1121 int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1122 const char *label, size_t llen, const unsigned char *context,
1123 size_t contextlen, int use_context)
1124 {
1125 unsigned char *buff;
1126 unsigned char *val = NULL;
1127 size_t vallen, currentvalpos;
1128 int rv;
1129
1130 #ifdef KSSL_DEBUG
1131 printf ("tls1_export_keying_material(%p,%p,%d,%s,%d,%p,%d)\n", s, out, olen, label, llen, context, contextlen);
1132 #endif /* KSSL_DEBUG */
1133
1134 buff = OPENSSL_malloc(olen);
1135 if (buff == NULL) goto err2;
1136
1137 /* construct PRF arguments
1138 * we construct the PRF argument ourself rather than passing separate
1139 * values into the TLS PRF to ensure that the concatenation of values
1140 * does not create a prohibited label.
1141 */
1142 vallen = llen + SSL3_RANDOM_SIZE * 2;
1143 if (use_context)
1144 {
1145 vallen += 2 + contextlen;
1146 }
1147
1148 val = OPENSSL_malloc(vallen);
1149 if (val == NULL) goto err2;
1150 currentvalpos = 0;
1151 memcpy(val + currentvalpos, (unsigned char *) label, llen);
1152 currentvalpos += llen;
1153 memcpy(val + currentvalpos, s->s3->client_random, SSL3_RANDOM_SIZE);
1154 currentvalpos += SSL3_RANDOM_SIZE;
1155 memcpy(val + currentvalpos, s->s3->server_random, SSL3_RANDOM_SIZE);
1156 currentvalpos += SSL3_RANDOM_SIZE;
1157
1158 if (use_context)
1159 {
1160 val[currentvalpos] = (contextlen >> 8) & 0xff;
1161 currentvalpos++;
1162 val[currentvalpos] = contextlen & 0xff;
1163 currentvalpos++;
1164 if ((contextlen > 0) || (context != NULL))
1165 {
1166 memcpy(val + currentvalpos, context, contextlen);
1167 }
1168 }
1169
1170 /* disallow prohibited labels
1171 * note that SSL3_RANDOM_SIZE > max(prohibited label len) =
1172 * 15, so size of val > max(prohibited label len) = 15 and the
1173 * comparisons won't have buffer overflow
1174 */
1175 if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST,
1176 TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0) goto err1;
1177 if (memcmp(val, TLS_MD_SERVER_FINISH_CONST,
1178 TLS_MD_SERVER_FINISH_CONST_SIZE) == 0) goto err1;
1179 if (memcmp(val, TLS_MD_MASTER_SECRET_CONST,
1180 TLS_MD_MASTER_SECRET_CONST_SIZE) == 0) goto err1;
1181 if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST,
1182 TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0) goto err1;
1183
1184 rv = tls1_PRF(ssl_get_algorithm2(s),
1185 val, vallen,
1186 NULL, 0,
1187 NULL, 0,
1188 NULL, 0,
1189 NULL, 0,
1190 s->session->master_key,s->session->master_key_length,
1191 out,buff,olen);
1192
1193 #ifdef KSSL_DEBUG
1194 printf ("tls1_export_keying_material() complete\n");
1195 #endif /* KSSL_DEBUG */
1196 goto ret;
1197 err1:
1198 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
1199 rv = 0;
1200 goto ret;
1201 err2:
1202 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE);
1203 rv = 0;
1204 ret:
1205 if (buff != NULL) OPENSSL_free(buff);
1206 if (val != NULL) OPENSSL_free(val);
1207 return(rv);
1208 }
1209
1210 int tls1_alert_code(int code)
1211 {
1212 switch (code)
1213 {
1214 case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY);
1215 case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
1216 case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC);
1217 case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED);
1218 case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW);
1219 case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
1220 case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE);
1221 case SSL_AD_NO_CERTIFICATE: return(-1);
1222 case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE);
1223 case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
1224 case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
1225 case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
1226 case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
1227 case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER);
1228 case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA);
1229 case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED);
1230 case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR);
1231 case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR);
1232 case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION);
1233 case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION);
1234 case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
1235 case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR);
1236 case SSL_AD_USER_CANCELLED: return(TLS1_AD_USER_CANCELLED);
1237 case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION);
1238 case SSL_AD_UNSUPPORTED_EXTENSION: return(TLS1_AD_UNSUPPORTED_EXTENSION);
1239 case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(TLS1_AD_CERTIFICATE_UNOBTAINABLE);
1240 case SSL_AD_UNRECOGNIZED_NAME: return(TLS1_AD_UNRECOGNIZED_NAME);
1241 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
1242 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE);
1243 case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY);
1244 #if 0 /* not appropriate for TLS, not used for DTLS */
1245 case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return
1246 (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);
1247 #endif
1248 default: return(-1);
1249 }
1250 }