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 */
tls1_P_hash(const EVP_MD * md,const unsigned char * sec,int sec_len,const void * seed1,int seed1_len,const void * seed2,int seed2_len,const void * seed3,int seed3_len,const void * seed4,int seed4_len,const void * seed5,int seed5_len,unsigned char * out,int olen)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 /* Reinit mac contexts */
198 if (!EVP_DigestSignInit(&ctx, NULL, md, NULL, mac_key))
199 goto err;
200 if (!EVP_DigestSignInit(&ctx_tmp, NULL, md, NULL, mac_key))
201 goto err;
202 if (!EVP_DigestSignUpdate(&ctx, A1, A1_len))
203 goto err;
204 if (!EVP_DigestSignUpdate(&ctx_tmp, A1, A1_len))
205 goto err;
206 if (seed1 && !EVP_DigestSignUpdate(&ctx, seed1, seed1_len))
207 goto err;
208 if (seed2 && !EVP_DigestSignUpdate(&ctx, seed2, seed2_len))
209 goto err;
210 if (seed3 && !EVP_DigestSignUpdate(&ctx, seed3, seed3_len))
211 goto err;
212 if (seed4 && !EVP_DigestSignUpdate(&ctx, seed4, seed4_len))
213 goto err;
214 if (seed5 && !EVP_DigestSignUpdate(&ctx, seed5, seed5_len))
215 goto err;
216
217 if (olen > chunk) {
218 if (!EVP_DigestSignFinal(&ctx, out, &j))
219 goto err;
220 out += j;
221 olen -= j;
222 /* calc the next A1 value */
223 if (!EVP_DigestSignFinal(&ctx_tmp, A1, &A1_len))
224 goto err;
225 } else { /* last one */
226
227 if (!EVP_DigestSignFinal(&ctx, A1, &A1_len))
228 goto err;
229 memcpy(out, A1, olen);
230 break;
231 }
232 }
233 ret = 1;
234 err:
235 EVP_PKEY_free(mac_key);
236 EVP_MD_CTX_cleanup(&ctx);
237 EVP_MD_CTX_cleanup(&ctx_tmp);
238 OPENSSL_cleanse(A1, sizeof(A1));
239 return ret;
240 }
241
242 /* seed1 through seed5 are virtually concatenated */
tls1_PRF(long digest_mask,const void * seed1,int seed1_len,const void * seed2,int seed2_len,const void * seed3,int seed3_len,const void * seed4,int seed4_len,const void * seed5,int seed5_len,const unsigned char * sec,int slen,unsigned char * out1,unsigned char * out2,int olen)243 static int tls1_PRF(long digest_mask,
244 const void *seed1, int seed1_len,
245 const void *seed2, int seed2_len,
246 const void *seed3, int seed3_len,
247 const void *seed4, int seed4_len,
248 const void *seed5, int seed5_len,
249 const unsigned char *sec, int slen,
250 unsigned char *out1, unsigned char *out2, int olen)
251 {
252 int len, i, idx, count;
253 const unsigned char *S1;
254 long m;
255 const EVP_MD *md;
256 int ret = 0;
257
258 /* Count number of digests and partition sec evenly */
259 count = 0;
260 for (idx = 0; ssl_get_handshake_digest(idx, &m, &md); idx++) {
261 if ((m << TLS1_PRF_DGST_SHIFT) & digest_mask)
262 count++;
263 }
264 if (!count) {
265 /* Should never happen */
266 SSLerr(SSL_F_TLS1_PRF, ERR_R_INTERNAL_ERROR);
267 goto err;
268 }
269 len = slen / count;
270 if (count == 1)
271 slen = 0;
272 S1 = sec;
273 memset(out1, 0, olen);
274 for (idx = 0; ssl_get_handshake_digest(idx, &m, &md); idx++) {
275 if ((m << TLS1_PRF_DGST_SHIFT) & digest_mask) {
276 if (!md) {
277 SSLerr(SSL_F_TLS1_PRF, SSL_R_UNSUPPORTED_DIGEST_TYPE);
278 goto err;
279 }
280 if (!tls1_P_hash(md, S1, len + (slen & 1),
281 seed1, seed1_len, seed2, seed2_len, seed3,
282 seed3_len, seed4, seed4_len, seed5, seed5_len,
283 out2, olen))
284 goto err;
285 S1 += len;
286 for (i = 0; i < olen; i++) {
287 out1[i] ^= out2[i];
288 }
289 }
290 }
291 ret = 1;
292 err:
293 return ret;
294 }
295
tls1_generate_key_block(SSL * s,unsigned char * km,unsigned char * tmp,int num)296 static int tls1_generate_key_block(SSL *s, unsigned char *km,
297 unsigned char *tmp, int num)
298 {
299 int ret;
300 ret = tls1_PRF(ssl_get_algorithm2(s),
301 TLS_MD_KEY_EXPANSION_CONST,
302 TLS_MD_KEY_EXPANSION_CONST_SIZE, s->s3->server_random,
303 SSL3_RANDOM_SIZE, s->s3->client_random, SSL3_RANDOM_SIZE,
304 NULL, 0, NULL, 0, s->session->master_key,
305 s->session->master_key_length, km, tmp, num);
306 #ifdef KSSL_DEBUG
307 fprintf(stderr, "tls1_generate_key_block() ==> %d byte master_key =\n\t",
308 s->session->master_key_length);
309 {
310 int i;
311 for (i = 0; i < s->session->master_key_length; i++) {
312 fprintf(stderr, "%02X", s->session->master_key[i]);
313 }
314 fprintf(stderr, "\n");
315 }
316 #endif /* KSSL_DEBUG */
317 return ret;
318 }
319
tls1_change_cipher_state(SSL * s,int which)320 int tls1_change_cipher_state(SSL *s, int which)
321 {
322 static const unsigned char empty[] = "";
323 unsigned char *p, *mac_secret;
324 unsigned char *exp_label;
325 unsigned char tmp1[EVP_MAX_KEY_LENGTH];
326 unsigned char tmp2[EVP_MAX_KEY_LENGTH];
327 unsigned char iv1[EVP_MAX_IV_LENGTH * 2];
328 unsigned char iv2[EVP_MAX_IV_LENGTH * 2];
329 unsigned char *ms, *key, *iv;
330 int client_write;
331 EVP_CIPHER_CTX *dd;
332 const EVP_CIPHER *c;
333 #ifndef OPENSSL_NO_COMP
334 const SSL_COMP *comp;
335 #endif
336 const EVP_MD *m;
337 int mac_type;
338 int *mac_secret_size;
339 EVP_MD_CTX *mac_ctx;
340 EVP_PKEY *mac_key;
341 int is_export, n, i, j, k, exp_label_len, cl;
342 int reuse_dd = 0;
343
344 is_export = SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
345 c = s->s3->tmp.new_sym_enc;
346 m = s->s3->tmp.new_hash;
347 mac_type = s->s3->tmp.new_mac_pkey_type;
348 #ifndef OPENSSL_NO_COMP
349 comp = s->s3->tmp.new_compression;
350 #endif
351
352 #ifdef KSSL_DEBUG
353 fprintf(stderr, "tls1_change_cipher_state(which= %d) w/\n", which);
354 fprintf(stderr, "\talg= %ld/%ld, comp= %p\n",
355 s->s3->tmp.new_cipher->algorithm_mkey,
356 s->s3->tmp.new_cipher->algorithm_auth, comp);
357 fprintf(stderr, "\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c);
358 fprintf(stderr, "\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
359 c->nid, c->block_size, c->key_len, c->iv_len);
360 fprintf(stderr, "\tkey_block: len= %d, data= ",
361 s->s3->tmp.key_block_length);
362 {
363 int i;
364 for (i = 0; i < s->s3->tmp.key_block_length; i++)
365 fprintf(stderr, "%02x", s->s3->tmp.key_block[i]);
366 fprintf(stderr, "\n");
367 }
368 #endif /* KSSL_DEBUG */
369
370 if (which & SSL3_CC_READ) {
371 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
372 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
373 else
374 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
375
376 if (s->enc_read_ctx != NULL)
377 reuse_dd = 1;
378 else if ((s->enc_read_ctx =
379 OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
380 goto err;
381 else
382 /*
383 * make sure it's intialized in case we exit later with an error
384 */
385 EVP_CIPHER_CTX_init(s->enc_read_ctx);
386 dd = s->enc_read_ctx;
387 mac_ctx = ssl_replace_hash(&s->read_hash, NULL);
388 if (mac_ctx == NULL)
389 goto err;
390 #ifndef OPENSSL_NO_COMP
391 if (s->expand != NULL) {
392 COMP_CTX_free(s->expand);
393 s->expand = NULL;
394 }
395 if (comp != NULL) {
396 s->expand = COMP_CTX_new(comp->method);
397 if (s->expand == NULL) {
398 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,
399 SSL_R_COMPRESSION_LIBRARY_ERROR);
400 goto err2;
401 }
402 if (s->s3->rrec.comp == NULL)
403 s->s3->rrec.comp = (unsigned char *)
404 OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
405 if (s->s3->rrec.comp == NULL)
406 goto err;
407 }
408 #endif
409 /*
410 * this is done by dtls1_reset_seq_numbers for DTLS1_VERSION
411 */
412 if (s->version != DTLS1_VERSION)
413 memset(&(s->s3->read_sequence[0]), 0, 8);
414 mac_secret = &(s->s3->read_mac_secret[0]);
415 mac_secret_size = &(s->s3->read_mac_secret_size);
416 } else {
417 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
418 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
419 else
420 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
421 if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s))
422 reuse_dd = 1;
423 else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL)
424 goto err;
425 dd = s->enc_write_ctx;
426 if (SSL_IS_DTLS(s)) {
427 mac_ctx = EVP_MD_CTX_create();
428 if (mac_ctx == NULL)
429 goto err;
430 s->write_hash = mac_ctx;
431 } else {
432 mac_ctx = ssl_replace_hash(&s->write_hash, NULL);
433 if (mac_ctx == NULL)
434 goto err;
435 }
436 #ifndef OPENSSL_NO_COMP
437 if (s->compress != NULL) {
438 COMP_CTX_free(s->compress);
439 s->compress = NULL;
440 }
441 if (comp != NULL) {
442 s->compress = COMP_CTX_new(comp->method);
443 if (s->compress == NULL) {
444 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,
445 SSL_R_COMPRESSION_LIBRARY_ERROR);
446 goto err2;
447 }
448 }
449 #endif
450 /*
451 * this is done by dtls1_reset_seq_numbers for DTLS1_VERSION
452 */
453 if (s->version != DTLS1_VERSION)
454 memset(&(s->s3->write_sequence[0]), 0, 8);
455 mac_secret = &(s->s3->write_mac_secret[0]);
456 mac_secret_size = &(s->s3->write_mac_secret_size);
457 }
458
459 if (reuse_dd)
460 EVP_CIPHER_CTX_cleanup(dd);
461
462 p = s->s3->tmp.key_block;
463 i = *mac_secret_size = s->s3->tmp.new_mac_secret_size;
464
465 cl = EVP_CIPHER_key_length(c);
466 j = is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
467 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
468 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
469 /* If GCM mode only part of IV comes from PRF */
470 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
471 k = EVP_GCM_TLS_FIXED_IV_LEN;
472 else
473 k = EVP_CIPHER_iv_length(c);
474 if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
475 (which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
476 ms = &(p[0]);
477 n = i + i;
478 key = &(p[n]);
479 n += j + j;
480 iv = &(p[n]);
481 n += k + k;
482 exp_label = (unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
483 exp_label_len = TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
484 client_write = 1;
485 } else {
486 n = i;
487 ms = &(p[n]);
488 n += i + j;
489 key = &(p[n]);
490 n += j + k;
491 iv = &(p[n]);
492 n += k;
493 exp_label = (unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
494 exp_label_len = TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
495 client_write = 0;
496 }
497
498 if (n > s->s3->tmp.key_block_length) {
499 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
500 goto err2;
501 }
502
503 memcpy(mac_secret, ms, i);
504
505 if (!(EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER)) {
506 mac_key = EVP_PKEY_new_mac_key(mac_type, NULL,
507 mac_secret, *mac_secret_size);
508 if (mac_key == NULL
509 || EVP_DigestSignInit(mac_ctx, NULL, m, NULL, mac_key) <= 0) {
510 EVP_PKEY_free(mac_key);
511 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
512 goto err2;
513 }
514 EVP_PKEY_free(mac_key);
515 }
516 #ifdef TLS_DEBUG
517 printf("which = %04X\nmac key=", which);
518 {
519 int z;
520 for (z = 0; z < i; z++)
521 printf("%02X%c", ms[z], ((z + 1) % 16) ? ' ' : '\n');
522 }
523 #endif
524 if (is_export) {
525 /*
526 * In here I set both the read and write key/iv to the same value
527 * since only the correct one will be used :-).
528 */
529 if (!tls1_PRF(ssl_get_algorithm2(s),
530 exp_label, exp_label_len,
531 s->s3->client_random, SSL3_RANDOM_SIZE,
532 s->s3->server_random, SSL3_RANDOM_SIZE,
533 NULL, 0, NULL, 0,
534 key, j, tmp1, tmp2, EVP_CIPHER_key_length(c)))
535 goto err2;
536 key = tmp1;
537
538 if (k > 0) {
539 if (!tls1_PRF(ssl_get_algorithm2(s),
540 TLS_MD_IV_BLOCK_CONST, TLS_MD_IV_BLOCK_CONST_SIZE,
541 s->s3->client_random, SSL3_RANDOM_SIZE,
542 s->s3->server_random, SSL3_RANDOM_SIZE,
543 NULL, 0, NULL, 0, empty, 0, iv1, iv2, k * 2))
544 goto err2;
545 if (client_write)
546 iv = iv1;
547 else
548 iv = &(iv1[k]);
549 }
550 }
551
552 s->session->key_arg_length = 0;
553 #ifdef KSSL_DEBUG
554 {
555 int i;
556 fprintf(stderr, "EVP_CipherInit_ex(dd,c,key=,iv=,which)\n");
557 fprintf(stderr, "\tkey= ");
558 for (i = 0; i < c->key_len; i++)
559 fprintf(stderr, "%02x", key[i]);
560 fprintf(stderr, "\n");
561 fprintf(stderr, "\t iv= ");
562 for (i = 0; i < c->iv_len; i++)
563 fprintf(stderr, "%02x", iv[i]);
564 fprintf(stderr, "\n");
565 }
566 #endif /* KSSL_DEBUG */
567
568 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) {
569 if (!EVP_CipherInit_ex(dd, c, NULL, key, NULL, (which & SSL3_CC_WRITE))
570 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, k, iv)) {
571 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
572 goto err2;
573 }
574 } else {
575 if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE))) {
576 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
577 goto err2;
578 }
579 }
580 /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
581 if ((EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size
582 && !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_MAC_KEY,
583 *mac_secret_size, mac_secret)) {
584 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
585 goto err2;
586 }
587
588 #ifdef TLS_DEBUG
589 printf("which = %04X\nkey=", which);
590 {
591 int z;
592 for (z = 0; z < EVP_CIPHER_key_length(c); z++)
593 printf("%02X%c", key[z], ((z + 1) % 16) ? ' ' : '\n');
594 }
595 printf("\niv=");
596 {
597 int z;
598 for (z = 0; z < k; z++)
599 printf("%02X%c", iv[z], ((z + 1) % 16) ? ' ' : '\n');
600 }
601 printf("\n");
602 #endif
603
604 OPENSSL_cleanse(tmp1, sizeof(tmp1));
605 OPENSSL_cleanse(tmp2, sizeof(tmp1));
606 OPENSSL_cleanse(iv1, sizeof(iv1));
607 OPENSSL_cleanse(iv2, sizeof(iv2));
608 return (1);
609 err:
610 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_MALLOC_FAILURE);
611 err2:
612 return (0);
613 }
614
tls1_setup_key_block(SSL * s)615 int tls1_setup_key_block(SSL *s)
616 {
617 unsigned char *p1, *p2 = NULL;
618 const EVP_CIPHER *c;
619 const EVP_MD *hash;
620 int num;
621 SSL_COMP *comp;
622 int mac_type = NID_undef, mac_secret_size = 0;
623 int ret = 0;
624
625 #ifdef KSSL_DEBUG
626 fprintf(stderr, "tls1_setup_key_block()\n");
627 #endif /* KSSL_DEBUG */
628
629 if (s->s3->tmp.key_block_length != 0)
630 return (1);
631
632 if (!ssl_cipher_get_evp
633 (s->session, &c, &hash, &mac_type, &mac_secret_size, &comp)) {
634 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK, SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
635 return (0);
636 }
637
638 s->s3->tmp.new_sym_enc = c;
639 s->s3->tmp.new_hash = hash;
640 s->s3->tmp.new_mac_pkey_type = mac_type;
641 s->s3->tmp.new_mac_secret_size = mac_secret_size;
642 num =
643 EVP_CIPHER_key_length(c) + mac_secret_size + EVP_CIPHER_iv_length(c);
644 num *= 2;
645
646 ssl3_cleanup_key_block(s);
647
648 if ((p1 = (unsigned char *)OPENSSL_malloc(num)) == NULL) {
649 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK, ERR_R_MALLOC_FAILURE);
650 goto err;
651 }
652
653 s->s3->tmp.key_block_length = num;
654 s->s3->tmp.key_block = p1;
655
656 if ((p2 = (unsigned char *)OPENSSL_malloc(num)) == NULL) {
657 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK, ERR_R_MALLOC_FAILURE);
658 OPENSSL_free(p1);
659 goto err;
660 }
661 #ifdef TLS_DEBUG
662 printf("client random\n");
663 {
664 int z;
665 for (z = 0; z < SSL3_RANDOM_SIZE; z++)
666 printf("%02X%c", s->s3->client_random[z],
667 ((z + 1) % 16) ? ' ' : '\n');
668 }
669 printf("server random\n");
670 {
671 int z;
672 for (z = 0; z < SSL3_RANDOM_SIZE; z++)
673 printf("%02X%c", s->s3->server_random[z],
674 ((z + 1) % 16) ? ' ' : '\n');
675 }
676 printf("pre-master\n");
677 {
678 int z;
679 for (z = 0; z < s->session->master_key_length; z++)
680 printf("%02X%c", s->session->master_key[z],
681 ((z + 1) % 16) ? ' ' : '\n');
682 }
683 #endif
684 if (!tls1_generate_key_block(s, p1, p2, num))
685 goto err;
686 #ifdef TLS_DEBUG
687 printf("\nkey block\n");
688 {
689 int z;
690 for (z = 0; z < num; z++)
691 printf("%02X%c", p1[z], ((z + 1) % 16) ? ' ' : '\n');
692 }
693 #endif
694
695 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)
696 && s->method->version <= TLS1_VERSION) {
697 /*
698 * enable vulnerability countermeasure for CBC ciphers with known-IV
699 * problem (http://www.openssl.org/~bodo/tls-cbc.txt)
700 */
701 s->s3->need_empty_fragments = 1;
702
703 if (s->session->cipher != NULL) {
704 if (s->session->cipher->algorithm_enc == SSL_eNULL)
705 s->s3->need_empty_fragments = 0;
706
707 #ifndef OPENSSL_NO_RC4
708 if (s->session->cipher->algorithm_enc == SSL_RC4)
709 s->s3->need_empty_fragments = 0;
710 #endif
711 }
712 }
713
714 ret = 1;
715 err:
716 if (p2) {
717 OPENSSL_cleanse(p2, num);
718 OPENSSL_free(p2);
719 }
720 return (ret);
721 }
722
723 /*-
724 * tls1_enc encrypts/decrypts the record in |s->wrec| / |s->rrec|, respectively.
725 *
726 * Returns:
727 * 0: (in non-constant time) if the record is publically invalid (i.e. too
728 * short etc).
729 * 1: if the record's padding is valid / the encryption was successful.
730 * -1: if the record's padding/AEAD-authenticator is invalid or, if sending,
731 * an internal error occured.
732 */
tls1_enc(SSL * s,int send)733 int tls1_enc(SSL *s, int send)
734 {
735 SSL3_RECORD *rec;
736 EVP_CIPHER_CTX *ds;
737 unsigned long l;
738 int bs, i, j, k, pad = 0, ret, mac_size = 0;
739 const EVP_CIPHER *enc;
740
741 if (send) {
742 if (EVP_MD_CTX_md(s->write_hash)) {
743 int n = EVP_MD_CTX_size(s->write_hash);
744 OPENSSL_assert(n >= 0);
745 }
746 ds = s->enc_write_ctx;
747 rec = &(s->s3->wrec);
748 if (s->enc_write_ctx == NULL)
749 enc = NULL;
750 else {
751 int ivlen;
752 enc = EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
753 /* For TLSv1.1 and later explicit IV */
754 if (s->version >= TLS1_1_VERSION
755 && EVP_CIPHER_mode(enc) == EVP_CIPH_CBC_MODE)
756 ivlen = EVP_CIPHER_iv_length(enc);
757 else
758 ivlen = 0;
759 if (ivlen > 1) {
760 if (rec->data != rec->input)
761 /*
762 * we can't write into the input stream: Can this ever
763 * happen?? (steve)
764 */
765 fprintf(stderr,
766 "%s:%d: rec->data != rec->input\n",
767 __FILE__, __LINE__);
768 else if (RAND_bytes(rec->input, ivlen) <= 0)
769 return -1;
770 }
771 }
772 } else {
773 if (EVP_MD_CTX_md(s->read_hash)) {
774 int n = EVP_MD_CTX_size(s->read_hash);
775 OPENSSL_assert(n >= 0);
776 }
777 ds = s->enc_read_ctx;
778 rec = &(s->s3->rrec);
779 if (s->enc_read_ctx == NULL)
780 enc = NULL;
781 else
782 enc = EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
783 }
784
785 #ifdef KSSL_DEBUG
786 fprintf(stderr, "tls1_enc(%d)\n", send);
787 #endif /* KSSL_DEBUG */
788
789 if ((s->session == NULL) || (ds == NULL) || (enc == NULL)) {
790 memmove(rec->data, rec->input, rec->length);
791 rec->input = rec->data;
792 ret = 1;
793 } else {
794 l = rec->length;
795 bs = EVP_CIPHER_block_size(ds->cipher);
796
797 if (EVP_CIPHER_flags(ds->cipher) & EVP_CIPH_FLAG_AEAD_CIPHER) {
798 unsigned char buf[EVP_AEAD_TLS1_AAD_LEN], *seq;
799
800 seq = send ? s->s3->write_sequence : s->s3->read_sequence;
801
802 if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER) {
803 unsigned char dtlsseq[9], *p = dtlsseq;
804
805 s2n(send ? s->d1->w_epoch : s->d1->r_epoch, p);
806 memcpy(p, &seq[2], 6);
807 memcpy(buf, dtlsseq, 8);
808 } else {
809 memcpy(buf, seq, 8);
810 for (i = 7; i >= 0; i--) { /* increment */
811 ++seq[i];
812 if (seq[i] != 0)
813 break;
814 }
815 }
816
817 buf[8] = rec->type;
818 buf[9] = (unsigned char)(s->version >> 8);
819 buf[10] = (unsigned char)(s->version);
820 buf[11] = rec->length >> 8;
821 buf[12] = rec->length & 0xff;
822 pad = EVP_CIPHER_CTX_ctrl(ds, EVP_CTRL_AEAD_TLS1_AAD,
823 EVP_AEAD_TLS1_AAD_LEN, buf);
824 if (pad <= 0)
825 return -1;
826 if (send) {
827 l += pad;
828 rec->length += pad;
829 }
830 } else if ((bs != 1) && send) {
831 i = bs - ((int)l % bs);
832
833 /* Add weird padding of upto 256 bytes */
834
835 /* we need to add 'i' padding bytes of value j */
836 j = i - 1;
837 if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG) {
838 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
839 j++;
840 }
841 for (k = (int)l; k < (int)(l + i); k++)
842 rec->input[k] = j;
843 l += i;
844 rec->length += i;
845 }
846 #ifdef KSSL_DEBUG
847 {
848 unsigned long ui;
849 fprintf(stderr,
850 "EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
851 ds, rec->data, rec->input, l);
852 fprintf(stderr,
853 "\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%lu %lu], %d iv_len\n",
854 ds->buf_len, ds->cipher->key_len, DES_KEY_SZ,
855 DES_SCHEDULE_SZ, ds->cipher->iv_len);
856 fprintf(stderr, "\t\tIV: ");
857 for (i = 0; i < ds->cipher->iv_len; i++)
858 fprintf(stderr, "%02X", ds->iv[i]);
859 fprintf(stderr, "\n");
860 fprintf(stderr, "\trec->input=");
861 for (ui = 0; ui < l; ui++)
862 fprintf(stderr, " %02x", rec->input[ui]);
863 fprintf(stderr, "\n");
864 }
865 #endif /* KSSL_DEBUG */
866
867 if (!send) {
868 if (l == 0 || l % bs != 0)
869 return 0;
870 }
871
872 i = EVP_Cipher(ds, rec->data, rec->input, l);
873 if ((EVP_CIPHER_flags(ds->cipher) & EVP_CIPH_FLAG_CUSTOM_CIPHER)
874 ? (i < 0)
875 : (i == 0))
876 return -1; /* AEAD can fail to verify MAC */
877 if (EVP_CIPHER_mode(enc) == EVP_CIPH_GCM_MODE && !send) {
878 rec->data += EVP_GCM_TLS_EXPLICIT_IV_LEN;
879 rec->input += EVP_GCM_TLS_EXPLICIT_IV_LEN;
880 rec->length -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
881 }
882 #ifdef KSSL_DEBUG
883 {
884 unsigned long i;
885 fprintf(stderr, "\trec->data=");
886 for (i = 0; i < l; i++)
887 fprintf(stderr, " %02x", rec->data[i]);
888 fprintf(stderr, "\n");
889 }
890 #endif /* KSSL_DEBUG */
891
892 ret = 1;
893 if (EVP_MD_CTX_md(s->read_hash) != NULL)
894 mac_size = EVP_MD_CTX_size(s->read_hash);
895 if ((bs != 1) && !send)
896 ret = tls1_cbc_remove_padding(s, rec, bs, mac_size);
897 if (pad && !send)
898 rec->length -= pad;
899 }
900 return ret;
901 }
902
tls1_cert_verify_mac(SSL * s,int md_nid,unsigned char * out)903 int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out)
904 {
905 unsigned int ret;
906 EVP_MD_CTX ctx, *d = NULL;
907 int i;
908
909 if (s->s3->handshake_buffer)
910 if (!ssl3_digest_cached_records(s))
911 return 0;
912
913 for (i = 0; i < SSL_MAX_DIGEST; i++) {
914 if (s->s3->handshake_dgst[i]
915 && EVP_MD_CTX_type(s->s3->handshake_dgst[i]) == md_nid) {
916 d = s->s3->handshake_dgst[i];
917 break;
918 }
919 }
920 if (!d) {
921 SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC, SSL_R_NO_REQUIRED_DIGEST);
922 return 0;
923 }
924
925 EVP_MD_CTX_init(&ctx);
926 if (EVP_MD_CTX_copy_ex(&ctx, d) <=0
927 || EVP_DigestFinal_ex(&ctx, out, &ret) <= 0)
928 ret = 0;
929 EVP_MD_CTX_cleanup(&ctx);
930 return ((int)ret);
931 }
932
tls1_final_finish_mac(SSL * s,const char * str,int slen,unsigned char * out)933 int tls1_final_finish_mac(SSL *s,
934 const char *str, int slen, unsigned char *out)
935 {
936 unsigned int i;
937 EVP_MD_CTX ctx;
938 unsigned char buf[2 * EVP_MAX_MD_SIZE];
939 unsigned char *q, buf2[12];
940 int idx;
941 long mask;
942 int err = 0;
943 const EVP_MD *md;
944
945 q = buf;
946
947 if (s->s3->handshake_buffer)
948 if (!ssl3_digest_cached_records(s))
949 return 0;
950
951 EVP_MD_CTX_init(&ctx);
952
953 for (idx = 0; ssl_get_handshake_digest(idx, &mask, &md); idx++) {
954 if (mask & ssl_get_algorithm2(s)) {
955 int hashsize = EVP_MD_size(md);
956 EVP_MD_CTX *hdgst = s->s3->handshake_dgst[idx];
957 if (!hdgst || hashsize < 0
958 || hashsize > (int)(sizeof buf - (size_t)(q - buf))) {
959 /*
960 * internal error: 'buf' is too small for this cipersuite!
961 */
962 err = 1;
963 } else {
964 if (!EVP_MD_CTX_copy_ex(&ctx, hdgst) ||
965 !EVP_DigestFinal_ex(&ctx, q, &i) ||
966 (i != (unsigned int)hashsize))
967 err = 1;
968 q += hashsize;
969 }
970 }
971 }
972
973 if (!tls1_PRF(ssl_get_algorithm2(s),
974 str, slen, buf, (int)(q - buf), NULL, 0, NULL, 0, NULL, 0,
975 s->session->master_key, s->session->master_key_length,
976 out, buf2, sizeof buf2))
977 err = 1;
978 EVP_MD_CTX_cleanup(&ctx);
979
980 OPENSSL_cleanse(buf, (int)(q - buf));
981 OPENSSL_cleanse(buf2, sizeof(buf2));
982 if (err)
983 return 0;
984 else
985 return sizeof buf2;
986 }
987
tls1_mac(SSL * ssl,unsigned char * md,int send)988 int tls1_mac(SSL *ssl, unsigned char *md, int send)
989 {
990 SSL3_RECORD *rec;
991 unsigned char *seq;
992 EVP_MD_CTX *hash;
993 size_t md_size, orig_len;
994 int i;
995 EVP_MD_CTX hmac, *mac_ctx;
996 unsigned char header[13];
997 int stream_mac = (send ? (ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM)
998 : (ssl->mac_flags & SSL_MAC_FLAG_READ_MAC_STREAM));
999 int t;
1000
1001 if (send) {
1002 rec = &(ssl->s3->wrec);
1003 seq = &(ssl->s3->write_sequence[0]);
1004 hash = ssl->write_hash;
1005 } else {
1006 rec = &(ssl->s3->rrec);
1007 seq = &(ssl->s3->read_sequence[0]);
1008 hash = ssl->read_hash;
1009 }
1010
1011 t = EVP_MD_CTX_size(hash);
1012 OPENSSL_assert(t >= 0);
1013 md_size = t;
1014
1015 /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
1016 if (stream_mac) {
1017 mac_ctx = hash;
1018 } else {
1019 if (!EVP_MD_CTX_copy(&hmac, hash))
1020 return -1;
1021 mac_ctx = &hmac;
1022 }
1023
1024 if (ssl->version == DTLS1_VERSION || ssl->version == DTLS1_BAD_VER) {
1025 unsigned char dtlsseq[8], *p = dtlsseq;
1026
1027 s2n(send ? ssl->d1->w_epoch : ssl->d1->r_epoch, p);
1028 memcpy(p, &seq[2], 6);
1029
1030 memcpy(header, dtlsseq, 8);
1031 } else
1032 memcpy(header, seq, 8);
1033
1034 /*
1035 * kludge: tls1_cbc_remove_padding passes padding length in rec->type
1036 */
1037 orig_len = rec->length + md_size + ((unsigned int)rec->type >> 8);
1038 rec->type &= 0xff;
1039
1040 header[8] = rec->type;
1041 header[9] = (unsigned char)(ssl->version >> 8);
1042 header[10] = (unsigned char)(ssl->version);
1043 header[11] = (rec->length) >> 8;
1044 header[12] = (rec->length) & 0xff;
1045
1046 if (!send &&
1047 EVP_CIPHER_CTX_mode(ssl->enc_read_ctx) == EVP_CIPH_CBC_MODE &&
1048 ssl3_cbc_record_digest_supported(mac_ctx)) {
1049 /*
1050 * This is a CBC-encrypted record. We must avoid leaking any
1051 * timing-side channel information about how many blocks of data we
1052 * are hashing because that gives an attacker a timing-oracle.
1053 */
1054 /* Final param == not SSLv3 */
1055 if (ssl3_cbc_digest_record(mac_ctx,
1056 md, &md_size,
1057 header, rec->input,
1058 rec->length + md_size, orig_len,
1059 ssl->s3->read_mac_secret,
1060 ssl->s3->read_mac_secret_size, 0) <= 0) {
1061 if (!stream_mac)
1062 EVP_MD_CTX_cleanup(&hmac);
1063 return -1;
1064 }
1065 } else {
1066 if (EVP_DigestSignUpdate(mac_ctx, header, sizeof(header)) <= 0
1067 || EVP_DigestSignUpdate(mac_ctx, rec->input, rec->length) <= 0
1068 || EVP_DigestSignFinal(mac_ctx, md, &md_size) <= 0) {
1069 if (!stream_mac)
1070 EVP_MD_CTX_cleanup(&hmac);
1071 return -1;
1072 }
1073 #ifdef OPENSSL_FIPS
1074 if (!send && FIPS_mode())
1075 tls_fips_digest_extra(ssl->enc_read_ctx,
1076 mac_ctx, rec->input, rec->length, orig_len);
1077 #endif
1078 }
1079
1080 if (!stream_mac)
1081 EVP_MD_CTX_cleanup(&hmac);
1082 #ifdef TLS_DEBUG
1083 fprintf(stderr, "seq=");
1084 {
1085 int z;
1086 for (z = 0; z < 8; z++)
1087 fprintf(stderr, "%02X ", seq[z]);
1088 fprintf(stderr, "\n");
1089 }
1090 fprintf(stderr, "rec=");
1091 {
1092 unsigned int z;
1093 for (z = 0; z < rec->length; z++)
1094 fprintf(stderr, "%02X ", rec->data[z]);
1095 fprintf(stderr, "\n");
1096 }
1097 #endif
1098
1099 if (ssl->version != DTLS1_VERSION && ssl->version != DTLS1_BAD_VER) {
1100 for (i = 7; i >= 0; i--) {
1101 ++seq[i];
1102 if (seq[i] != 0)
1103 break;
1104 }
1105 }
1106 #ifdef TLS_DEBUG
1107 {
1108 unsigned int z;
1109 for (z = 0; z < md_size; z++)
1110 fprintf(stderr, "%02X ", md[z]);
1111 fprintf(stderr, "\n");
1112 }
1113 #endif
1114 return (md_size);
1115 }
1116
tls1_generate_master_secret(SSL * s,unsigned char * out,unsigned char * p,int len)1117 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
1118 int len)
1119 {
1120 unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
1121 const void *co = NULL, *so = NULL;
1122 int col = 0, sol = 0;
1123
1124 #ifdef KSSL_DEBUG
1125 fprintf(stderr, "tls1_generate_master_secret(%p,%p, %p, %d)\n", s, out, p,
1126 len);
1127 #endif /* KSSL_DEBUG */
1128
1129 #ifdef TLSEXT_TYPE_opaque_prf_input
1130 if (s->s3->client_opaque_prf_input != NULL
1131 && s->s3->server_opaque_prf_input != NULL
1132 && s->s3->client_opaque_prf_input_len > 0
1133 && s->s3->client_opaque_prf_input_len ==
1134 s->s3->server_opaque_prf_input_len) {
1135 co = s->s3->client_opaque_prf_input;
1136 col = s->s3->server_opaque_prf_input_len;
1137 so = s->s3->server_opaque_prf_input;
1138 /*
1139 * must be same as col (see
1140 * draft-rescorla-tls-opaque-prf-input-00.txt, section 3.1)
1141 */
1142 sol = s->s3->client_opaque_prf_input_len;
1143 }
1144 #endif
1145
1146 tls1_PRF(ssl_get_algorithm2(s),
1147 TLS_MD_MASTER_SECRET_CONST, TLS_MD_MASTER_SECRET_CONST_SIZE,
1148 s->s3->client_random, SSL3_RANDOM_SIZE,
1149 co, col,
1150 s->s3->server_random, SSL3_RANDOM_SIZE,
1151 so, sol, p, len, s->session->master_key, buff, sizeof buff);
1152 OPENSSL_cleanse(buff, sizeof buff);
1153 #ifdef SSL_DEBUG
1154 fprintf(stderr, "Premaster Secret:\n");
1155 BIO_dump_fp(stderr, (char *)p, len);
1156 fprintf(stderr, "Client Random:\n");
1157 BIO_dump_fp(stderr, (char *)s->s3->client_random, SSL3_RANDOM_SIZE);
1158 fprintf(stderr, "Server Random:\n");
1159 BIO_dump_fp(stderr, (char *)s->s3->server_random, SSL3_RANDOM_SIZE);
1160 fprintf(stderr, "Master Secret:\n");
1161 BIO_dump_fp(stderr, (char *)s->session->master_key,
1162 SSL3_MASTER_SECRET_SIZE);
1163 #endif
1164
1165 #ifdef KSSL_DEBUG
1166 fprintf(stderr, "tls1_generate_master_secret() complete\n");
1167 #endif /* KSSL_DEBUG */
1168 return (SSL3_MASTER_SECRET_SIZE);
1169 }
1170
tls1_export_keying_material(SSL * s,unsigned char * out,size_t olen,const char * label,size_t llen,const unsigned char * context,size_t contextlen,int use_context)1171 int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1172 const char *label, size_t llen,
1173 const unsigned char *context,
1174 size_t contextlen, int use_context)
1175 {
1176 unsigned char *buff;
1177 unsigned char *val = NULL;
1178 size_t vallen, currentvalpos;
1179 int rv;
1180
1181 #ifdef KSSL_DEBUG
1182 fprintf(stderr, "tls1_export_keying_material(%p,%p,%lu,%s,%lu,%p,%lu)\n",
1183 s, out, olen, label, llen, context, contextlen);
1184 #endif /* KSSL_DEBUG */
1185
1186 buff = OPENSSL_malloc(olen);
1187 if (buff == NULL)
1188 goto err2;
1189
1190 /*
1191 * construct PRF arguments we construct the PRF argument ourself rather
1192 * than passing separate values into the TLS PRF to ensure that the
1193 * concatenation of values does not create a prohibited label.
1194 */
1195 vallen = llen + SSL3_RANDOM_SIZE * 2;
1196 if (use_context) {
1197 vallen += 2 + contextlen;
1198 }
1199
1200 val = OPENSSL_malloc(vallen);
1201 if (val == NULL)
1202 goto err2;
1203 currentvalpos = 0;
1204 memcpy(val + currentvalpos, (unsigned char *)label, llen);
1205 currentvalpos += llen;
1206 memcpy(val + currentvalpos, s->s3->client_random, SSL3_RANDOM_SIZE);
1207 currentvalpos += SSL3_RANDOM_SIZE;
1208 memcpy(val + currentvalpos, s->s3->server_random, SSL3_RANDOM_SIZE);
1209 currentvalpos += SSL3_RANDOM_SIZE;
1210
1211 if (use_context) {
1212 val[currentvalpos] = (contextlen >> 8) & 0xff;
1213 currentvalpos++;
1214 val[currentvalpos] = contextlen & 0xff;
1215 currentvalpos++;
1216 if ((contextlen > 0) || (context != NULL)) {
1217 memcpy(val + currentvalpos, context, contextlen);
1218 }
1219 }
1220
1221 /*
1222 * disallow prohibited labels note that SSL3_RANDOM_SIZE > max(prohibited
1223 * label len) = 15, so size of val > max(prohibited label len) = 15 and
1224 * the comparisons won't have buffer overflow
1225 */
1226 if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST,
1227 TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0)
1228 goto err1;
1229 if (memcmp(val, TLS_MD_SERVER_FINISH_CONST,
1230 TLS_MD_SERVER_FINISH_CONST_SIZE) == 0)
1231 goto err1;
1232 if (memcmp(val, TLS_MD_MASTER_SECRET_CONST,
1233 TLS_MD_MASTER_SECRET_CONST_SIZE) == 0)
1234 goto err1;
1235 if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST,
1236 TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0)
1237 goto err1;
1238
1239 rv = tls1_PRF(ssl_get_algorithm2(s),
1240 val, vallen,
1241 NULL, 0,
1242 NULL, 0,
1243 NULL, 0,
1244 NULL, 0,
1245 s->session->master_key, s->session->master_key_length,
1246 out, buff, olen);
1247 OPENSSL_cleanse(val, vallen);
1248 OPENSSL_cleanse(buff, olen);
1249
1250 #ifdef KSSL_DEBUG
1251 fprintf(stderr, "tls1_export_keying_material() complete\n");
1252 #endif /* KSSL_DEBUG */
1253 goto ret;
1254 err1:
1255 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL,
1256 SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
1257 rv = 0;
1258 goto ret;
1259 err2:
1260 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE);
1261 rv = 0;
1262 ret:
1263 if (buff != NULL)
1264 OPENSSL_free(buff);
1265 if (val != NULL)
1266 OPENSSL_free(val);
1267 return (rv);
1268 }
1269
tls1_alert_code(int code)1270 int tls1_alert_code(int code)
1271 {
1272 switch (code) {
1273 case SSL_AD_CLOSE_NOTIFY:
1274 return (SSL3_AD_CLOSE_NOTIFY);
1275 case SSL_AD_UNEXPECTED_MESSAGE:
1276 return (SSL3_AD_UNEXPECTED_MESSAGE);
1277 case SSL_AD_BAD_RECORD_MAC:
1278 return (SSL3_AD_BAD_RECORD_MAC);
1279 case SSL_AD_DECRYPTION_FAILED:
1280 return (TLS1_AD_DECRYPTION_FAILED);
1281 case SSL_AD_RECORD_OVERFLOW:
1282 return (TLS1_AD_RECORD_OVERFLOW);
1283 case SSL_AD_DECOMPRESSION_FAILURE:
1284 return (SSL3_AD_DECOMPRESSION_FAILURE);
1285 case SSL_AD_HANDSHAKE_FAILURE:
1286 return (SSL3_AD_HANDSHAKE_FAILURE);
1287 case SSL_AD_NO_CERTIFICATE:
1288 return (-1);
1289 case SSL_AD_BAD_CERTIFICATE:
1290 return (SSL3_AD_BAD_CERTIFICATE);
1291 case SSL_AD_UNSUPPORTED_CERTIFICATE:
1292 return (SSL3_AD_UNSUPPORTED_CERTIFICATE);
1293 case SSL_AD_CERTIFICATE_REVOKED:
1294 return (SSL3_AD_CERTIFICATE_REVOKED);
1295 case SSL_AD_CERTIFICATE_EXPIRED:
1296 return (SSL3_AD_CERTIFICATE_EXPIRED);
1297 case SSL_AD_CERTIFICATE_UNKNOWN:
1298 return (SSL3_AD_CERTIFICATE_UNKNOWN);
1299 case SSL_AD_ILLEGAL_PARAMETER:
1300 return (SSL3_AD_ILLEGAL_PARAMETER);
1301 case SSL_AD_UNKNOWN_CA:
1302 return (TLS1_AD_UNKNOWN_CA);
1303 case SSL_AD_ACCESS_DENIED:
1304 return (TLS1_AD_ACCESS_DENIED);
1305 case SSL_AD_DECODE_ERROR:
1306 return (TLS1_AD_DECODE_ERROR);
1307 case SSL_AD_DECRYPT_ERROR:
1308 return (TLS1_AD_DECRYPT_ERROR);
1309 case SSL_AD_EXPORT_RESTRICTION:
1310 return (TLS1_AD_EXPORT_RESTRICTION);
1311 case SSL_AD_PROTOCOL_VERSION:
1312 return (TLS1_AD_PROTOCOL_VERSION);
1313 case SSL_AD_INSUFFICIENT_SECURITY:
1314 return (TLS1_AD_INSUFFICIENT_SECURITY);
1315 case SSL_AD_INTERNAL_ERROR:
1316 return (TLS1_AD_INTERNAL_ERROR);
1317 case SSL_AD_USER_CANCELLED:
1318 return (TLS1_AD_USER_CANCELLED);
1319 case SSL_AD_NO_RENEGOTIATION:
1320 return (TLS1_AD_NO_RENEGOTIATION);
1321 case SSL_AD_UNSUPPORTED_EXTENSION:
1322 return (TLS1_AD_UNSUPPORTED_EXTENSION);
1323 case SSL_AD_CERTIFICATE_UNOBTAINABLE:
1324 return (TLS1_AD_CERTIFICATE_UNOBTAINABLE);
1325 case SSL_AD_UNRECOGNIZED_NAME:
1326 return (TLS1_AD_UNRECOGNIZED_NAME);
1327 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
1328 return (TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
1329 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
1330 return (TLS1_AD_BAD_CERTIFICATE_HASH_VALUE);
1331 case SSL_AD_UNKNOWN_PSK_IDENTITY:
1332 return (TLS1_AD_UNKNOWN_PSK_IDENTITY);
1333 case SSL_AD_INAPPROPRIATE_FALLBACK:
1334 return (TLS1_AD_INAPPROPRIATE_FALLBACK);
1335 #if 0
1336 /* not appropriate for TLS, not used for DTLS */
1337 case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE:
1338 return (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);
1339 #endif
1340 default:
1341 return (-1);
1342 }
1343 }
1344