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58964a49 | 1 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
2 | * All rights reserved. |
3 | * | |
4 | * This package is an SSL implementation written | |
5 | * by Eric Young (eay@cryptsoft.com). | |
6 | * The implementation was written so as to conform with Netscapes SSL. | |
0f113f3e | 7 | * |
d02b48c6 RE |
8 | * This library is free for commercial and non-commercial use as long as |
9 | * the following conditions are aheared to. The following conditions | |
10 | * apply to all code found in this distribution, be it the RC4, RSA, | |
11 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
12 | * included with this distribution is covered by the same copyright terms | |
13 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
0f113f3e | 14 | * |
d02b48c6 RE |
15 | * Copyright remains Eric Young's, and as such any Copyright notices in |
16 | * the code are not to be removed. | |
17 | * If this package is used in a product, Eric Young should be given attribution | |
18 | * as the author of the parts of the library used. | |
19 | * This can be in the form of a textual message at program startup or | |
20 | * in documentation (online or textual) provided with the package. | |
0f113f3e | 21 | * |
d02b48c6 RE |
22 | * Redistribution and use in source and binary forms, with or without |
23 | * modification, are permitted provided that the following conditions | |
24 | * are met: | |
25 | * 1. Redistributions of source code must retain the copyright | |
26 | * notice, this list of conditions and the following disclaimer. | |
27 | * 2. Redistributions in binary form must reproduce the above copyright | |
28 | * notice, this list of conditions and the following disclaimer in the | |
29 | * documentation and/or other materials provided with the distribution. | |
30 | * 3. All advertising materials mentioning features or use of this software | |
31 | * must display the following acknowledgement: | |
32 | * "This product includes cryptographic software written by | |
33 | * Eric Young (eay@cryptsoft.com)" | |
34 | * The word 'cryptographic' can be left out if the rouines from the library | |
35 | * being used are not cryptographic related :-). | |
0f113f3e | 36 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
37 | * the apps directory (application code) you must include an acknowledgement: |
38 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 39 | * |
d02b48c6 RE |
40 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
41 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
42 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
43 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
44 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
45 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
46 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
48 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
49 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
50 | * SUCH DAMAGE. | |
0f113f3e | 51 | * |
d02b48c6 RE |
52 | * The licence and distribution terms for any publically available version or |
53 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
54 | * copied and put under another distribution licence | |
55 | * [including the GNU Public Licence.] | |
56 | */ | |
82b0bf0b | 57 | /* ==================================================================== |
52b8dad8 | 58 | * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. |
82b0bf0b BM |
59 | * |
60 | * Redistribution and use in source and binary forms, with or without | |
61 | * modification, are permitted provided that the following conditions | |
62 | * are met: | |
63 | * | |
64 | * 1. Redistributions of source code must retain the above copyright | |
0f113f3e | 65 | * notice, this list of conditions and the following disclaimer. |
82b0bf0b BM |
66 | * |
67 | * 2. Redistributions in binary form must reproduce the above copyright | |
68 | * notice, this list of conditions and the following disclaimer in | |
69 | * the documentation and/or other materials provided with the | |
70 | * distribution. | |
71 | * | |
72 | * 3. All advertising materials mentioning features or use of this | |
73 | * software must display the following acknowledgment: | |
74 | * "This product includes software developed by the OpenSSL Project | |
75 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
76 | * | |
77 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
78 | * endorse or promote products derived from this software without | |
79 | * prior written permission. For written permission, please contact | |
80 | * openssl-core@openssl.org. | |
81 | * | |
82 | * 5. Products derived from this software may not be called "OpenSSL" | |
83 | * nor may "OpenSSL" appear in their names without prior written | |
84 | * permission of the OpenSSL Project. | |
85 | * | |
86 | * 6. Redistributions of any form whatsoever must retain the following | |
87 | * acknowledgment: | |
88 | * "This product includes software developed by the OpenSSL Project | |
89 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
90 | * | |
91 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
92 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
93 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
94 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
95 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
96 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
97 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
98 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
99 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
100 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
101 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
102 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
103 | * ==================================================================== | |
104 | * | |
105 | * This product includes cryptographic software written by Eric Young | |
106 | * (eay@cryptsoft.com). This product includes software written by Tim | |
107 | * Hudson (tjh@cryptsoft.com). | |
108 | * | |
109 | */ | |
ddac1974 NL |
110 | /* ==================================================================== |
111 | * Copyright 2005 Nokia. All rights reserved. | |
112 | * | |
113 | * The portions of the attached software ("Contribution") is developed by | |
114 | * Nokia Corporation and is licensed pursuant to the OpenSSL open source | |
115 | * license. | |
116 | * | |
117 | * The Contribution, originally written by Mika Kousa and Pasi Eronen of | |
118 | * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites | |
119 | * support (see RFC 4279) to OpenSSL. | |
120 | * | |
121 | * No patent licenses or other rights except those expressly stated in | |
122 | * the OpenSSL open source license shall be deemed granted or received | |
123 | * expressly, by implication, estoppel, or otherwise. | |
124 | * | |
125 | * No assurances are provided by Nokia that the Contribution does not | |
126 | * infringe the patent or other intellectual property rights of any third | |
127 | * party or that the license provides you with all the necessary rights | |
128 | * to make use of the Contribution. | |
129 | * | |
130 | * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN | |
131 | * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA | |
132 | * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY | |
133 | * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR | |
134 | * OTHERWISE. | |
135 | */ | |
d02b48c6 RE |
136 | |
137 | #include <stdio.h> | |
d02b48c6 | 138 | #include "ssl_locl.h" |
7b63c0fa | 139 | #include <openssl/evp.h> |
dbad1690 | 140 | #include <openssl/md5.h> |
d02b48c6 | 141 | |
027e257b | 142 | static int ssl3_generate_key_block(SSL *s, unsigned char *km, int num) |
0f113f3e | 143 | { |
6e59a892 RL |
144 | EVP_MD_CTX *m5; |
145 | EVP_MD_CTX *s1; | |
0f113f3e MC |
146 | unsigned char buf[16], smd[SHA_DIGEST_LENGTH]; |
147 | unsigned char c = 'A'; | |
148 | unsigned int i, j, k; | |
6e59a892 | 149 | int ret = 0; |
58964a49 | 150 | |
ca570cfd | 151 | #ifdef CHARSET_EBCDIC |
0f113f3e | 152 | c = os_toascii[c]; /* 'A' in ASCII */ |
ca570cfd | 153 | #endif |
0f113f3e | 154 | k = 0; |
bfb0641f RL |
155 | m5 = EVP_MD_CTX_new(); |
156 | s1 = EVP_MD_CTX_new(); | |
6e59a892 RL |
157 | if (m5 == NULL || s1 == NULL) { |
158 | SSLerr(SSL_F_SSL3_GENERATE_KEY_BLOCK, ERR_R_MALLOC_FAILURE); | |
159 | goto err; | |
160 | } | |
161 | EVP_MD_CTX_set_flags(m5, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); | |
0f113f3e MC |
162 | for (i = 0; (int)i < num; i += MD5_DIGEST_LENGTH) { |
163 | k++; | |
164 | if (k > sizeof buf) { | |
165 | /* bug: 'buf' is too small for this ciphersuite */ | |
166 | SSLerr(SSL_F_SSL3_GENERATE_KEY_BLOCK, ERR_R_INTERNAL_ERROR); | |
167 | return 0; | |
168 | } | |
169 | ||
170 | for (j = 0; j < k; j++) | |
171 | buf[j] = c; | |
172 | c++; | |
6e59a892 RL |
173 | EVP_DigestInit_ex(s1, EVP_sha1(), NULL); |
174 | EVP_DigestUpdate(s1, buf, k); | |
175 | EVP_DigestUpdate(s1, s->session->master_key, | |
0f113f3e | 176 | s->session->master_key_length); |
6e59a892 RL |
177 | EVP_DigestUpdate(s1, s->s3->server_random, SSL3_RANDOM_SIZE); |
178 | EVP_DigestUpdate(s1, s->s3->client_random, SSL3_RANDOM_SIZE); | |
179 | EVP_DigestFinal_ex(s1, smd, NULL); | |
0f113f3e | 180 | |
6e59a892 RL |
181 | EVP_DigestInit_ex(m5, EVP_md5(), NULL); |
182 | EVP_DigestUpdate(m5, s->session->master_key, | |
0f113f3e | 183 | s->session->master_key_length); |
6e59a892 | 184 | EVP_DigestUpdate(m5, smd, SHA_DIGEST_LENGTH); |
0f113f3e | 185 | if ((int)(i + MD5_DIGEST_LENGTH) > num) { |
6e59a892 | 186 | EVP_DigestFinal_ex(m5, smd, NULL); |
0f113f3e MC |
187 | memcpy(km, smd, (num - i)); |
188 | } else | |
6e59a892 | 189 | EVP_DigestFinal_ex(m5, km, NULL); |
0f113f3e MC |
190 | |
191 | km += MD5_DIGEST_LENGTH; | |
192 | } | |
e0f9bf1d | 193 | OPENSSL_cleanse(smd, sizeof(smd)); |
6e59a892 RL |
194 | ret = 1; |
195 | err: | |
bfb0641f RL |
196 | EVP_MD_CTX_free(m5); |
197 | EVP_MD_CTX_free(s1); | |
6e59a892 | 198 | return ret; |
0f113f3e | 199 | } |
58964a49 | 200 | |
6b691a5c | 201 | int ssl3_change_cipher_state(SSL *s, int which) |
0f113f3e MC |
202 | { |
203 | unsigned char *p, *mac_secret; | |
204 | unsigned char exp_key[EVP_MAX_KEY_LENGTH]; | |
205 | unsigned char exp_iv[EVP_MAX_IV_LENGTH]; | |
361a1191 | 206 | unsigned char *ms, *key, *iv; |
0f113f3e MC |
207 | EVP_CIPHER_CTX *dd; |
208 | const EVP_CIPHER *c; | |
09b6c2ef | 209 | #ifndef OPENSSL_NO_COMP |
0f113f3e | 210 | COMP_METHOD *comp; |
09b6c2ef | 211 | #endif |
0f113f3e | 212 | const EVP_MD *m; |
361a1191 | 213 | int n, i, j, k, cl; |
0f113f3e MC |
214 | int reuse_dd = 0; |
215 | ||
0f113f3e MC |
216 | c = s->s3->tmp.new_sym_enc; |
217 | m = s->s3->tmp.new_hash; | |
218 | /* m == NULL will lead to a crash later */ | |
219 | OPENSSL_assert(m); | |
09b6c2ef | 220 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
221 | if (s->s3->tmp.new_compression == NULL) |
222 | comp = NULL; | |
223 | else | |
224 | comp = s->s3->tmp.new_compression->method; | |
09b6c2ef | 225 | #endif |
d02b48c6 | 226 | |
0f113f3e MC |
227 | if (which & SSL3_CC_READ) { |
228 | if (s->enc_read_ctx != NULL) | |
229 | reuse_dd = 1; | |
846ec07d | 230 | else if ((s->enc_read_ctx = EVP_CIPHER_CTX_new()) == NULL) |
0f113f3e MC |
231 | goto err; |
232 | else | |
233 | /* | |
e771eea6 | 234 | * make sure it's intialized in case we exit later with an error |
0f113f3e | 235 | */ |
846ec07d | 236 | EVP_CIPHER_CTX_reset(s->enc_read_ctx); |
0f113f3e MC |
237 | dd = s->enc_read_ctx; |
238 | ||
5f3d93e4 | 239 | if (ssl_replace_hash(&s->read_hash, m) == NULL) { |
69f68237 MC |
240 | SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR); |
241 | goto err2; | |
242 | } | |
09b6c2ef | 243 | #ifndef OPENSSL_NO_COMP |
0f113f3e | 244 | /* COMPRESS */ |
efa7dd64 RS |
245 | COMP_CTX_free(s->expand); |
246 | s->expand = NULL; | |
0f113f3e MC |
247 | if (comp != NULL) { |
248 | s->expand = COMP_CTX_new(comp); | |
249 | if (s->expand == NULL) { | |
250 | SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE, | |
251 | SSL_R_COMPRESSION_LIBRARY_ERROR); | |
252 | goto err2; | |
253 | } | |
0f113f3e | 254 | } |
09b6c2ef | 255 | #endif |
de07f311 | 256 | RECORD_LAYER_reset_read_sequence(&s->rlayer); |
0f113f3e MC |
257 | mac_secret = &(s->s3->read_mac_secret[0]); |
258 | } else { | |
259 | if (s->enc_write_ctx != NULL) | |
260 | reuse_dd = 1; | |
846ec07d | 261 | else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL) |
0f113f3e MC |
262 | goto err; |
263 | else | |
264 | /* | |
e771eea6 | 265 | * make sure it's intialized in case we exit later with an error |
0f113f3e | 266 | */ |
846ec07d | 267 | EVP_CIPHER_CTX_reset(s->enc_write_ctx); |
0f113f3e | 268 | dd = s->enc_write_ctx; |
5f3d93e4 | 269 | if (ssl_replace_hash(&s->write_hash, m) == NULL) { |
69f68237 MC |
270 | SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR); |
271 | goto err2; | |
272 | } | |
09b6c2ef | 273 | #ifndef OPENSSL_NO_COMP |
0f113f3e | 274 | /* COMPRESS */ |
efa7dd64 RS |
275 | COMP_CTX_free(s->compress); |
276 | s->compress = NULL; | |
0f113f3e MC |
277 | if (comp != NULL) { |
278 | s->compress = COMP_CTX_new(comp); | |
279 | if (s->compress == NULL) { | |
280 | SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE, | |
281 | SSL_R_COMPRESSION_LIBRARY_ERROR); | |
282 | goto err2; | |
283 | } | |
284 | } | |
09b6c2ef | 285 | #endif |
de07f311 | 286 | RECORD_LAYER_reset_write_sequence(&s->rlayer); |
0f113f3e MC |
287 | mac_secret = &(s->s3->write_mac_secret[0]); |
288 | } | |
289 | ||
290 | if (reuse_dd) | |
846ec07d | 291 | EVP_CIPHER_CTX_reset(dd); |
0f113f3e MC |
292 | |
293 | p = s->s3->tmp.key_block; | |
294 | i = EVP_MD_size(m); | |
295 | if (i < 0) | |
296 | goto err2; | |
297 | cl = EVP_CIPHER_key_length(c); | |
361a1191 | 298 | j = cl; |
0f113f3e MC |
299 | k = EVP_CIPHER_iv_length(c); |
300 | if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) || | |
301 | (which == SSL3_CHANGE_CIPHER_SERVER_READ)) { | |
302 | ms = &(p[0]); | |
303 | n = i + i; | |
304 | key = &(p[n]); | |
305 | n += j + j; | |
306 | iv = &(p[n]); | |
307 | n += k + k; | |
0f113f3e MC |
308 | } else { |
309 | n = i; | |
310 | ms = &(p[n]); | |
311 | n += i + j; | |
312 | key = &(p[n]); | |
313 | n += j + k; | |
314 | iv = &(p[n]); | |
315 | n += k; | |
0f113f3e MC |
316 | } |
317 | ||
318 | if (n > s->s3->tmp.key_block_length) { | |
319 | SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR); | |
320 | goto err2; | |
321 | } | |
322 | ||
0f113f3e | 323 | memcpy(mac_secret, ms, i); |
0f113f3e MC |
324 | |
325 | EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE)); | |
58964a49 | 326 | |
1cf218bc | 327 | #ifdef OPENSSL_SSL_TRACE_CRYPTO |
0f113f3e MC |
328 | if (s->msg_callback) { |
329 | ||
330 | int wh = which & SSL3_CC_WRITE ? | |
331 | TLS1_RT_CRYPTO_WRITE : TLS1_RT_CRYPTO_READ; | |
332 | s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_MAC, | |
333 | mac_secret, EVP_MD_size(m), s, s->msg_callback_arg); | |
334 | if (c->key_len) | |
335 | s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_KEY, | |
336 | key, c->key_len, s, s->msg_callback_arg); | |
337 | if (k) { | |
338 | s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_IV, | |
339 | iv, k, s, s->msg_callback_arg); | |
340 | } | |
341 | } | |
1cf218bc DSH |
342 | #endif |
343 | ||
e0f9bf1d RS |
344 | OPENSSL_cleanse(exp_key, sizeof(exp_key)); |
345 | OPENSSL_cleanse(exp_iv, sizeof(exp_iv)); | |
0f113f3e MC |
346 | return (1); |
347 | err: | |
348 | SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE, ERR_R_MALLOC_FAILURE); | |
349 | err2: | |
e0f9bf1d RS |
350 | OPENSSL_cleanse(exp_key, sizeof(exp_key)); |
351 | OPENSSL_cleanse(exp_iv, sizeof(exp_iv)); | |
0f113f3e MC |
352 | return (0); |
353 | } | |
d02b48c6 | 354 | |
6b691a5c | 355 | int ssl3_setup_key_block(SSL *s) |
0f113f3e MC |
356 | { |
357 | unsigned char *p; | |
358 | const EVP_CIPHER *c; | |
359 | const EVP_MD *hash; | |
360 | int num; | |
361 | int ret = 0; | |
362 | SSL_COMP *comp; | |
363 | ||
364 | if (s->s3->tmp.key_block_length != 0) | |
365 | return (1); | |
366 | ||
367 | if (!ssl_cipher_get_evp(s->session, &c, &hash, NULL, NULL, &comp, 0)) { | |
368 | SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK, SSL_R_CIPHER_OR_HASH_UNAVAILABLE); | |
369 | return (0); | |
370 | } | |
371 | ||
372 | s->s3->tmp.new_sym_enc = c; | |
373 | s->s3->tmp.new_hash = hash; | |
09b6c2ef | 374 | #ifdef OPENSSL_NO_COMP |
0f113f3e | 375 | s->s3->tmp.new_compression = NULL; |
09b6c2ef | 376 | #else |
0f113f3e | 377 | s->s3->tmp.new_compression = comp; |
09b6c2ef | 378 | #endif |
d02b48c6 | 379 | |
0f113f3e MC |
380 | num = EVP_MD_size(hash); |
381 | if (num < 0) | |
382 | return 0; | |
383 | ||
384 | num = EVP_CIPHER_key_length(c) + num + EVP_CIPHER_iv_length(c); | |
385 | num *= 2; | |
0eab41fb | 386 | |
0f113f3e | 387 | ssl3_cleanup_key_block(s); |
d02b48c6 | 388 | |
0f113f3e MC |
389 | if ((p = OPENSSL_malloc(num)) == NULL) |
390 | goto err; | |
d02b48c6 | 391 | |
0f113f3e MC |
392 | s->s3->tmp.key_block_length = num; |
393 | s->s3->tmp.key_block = p; | |
d02b48c6 | 394 | |
0f113f3e | 395 | ret = ssl3_generate_key_block(s, p, num); |
d02b48c6 | 396 | |
0f113f3e MC |
397 | if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) { |
398 | /* | |
399 | * enable vulnerability countermeasure for CBC ciphers with known-IV | |
400 | * problem (http://www.openssl.org/~bodo/tls-cbc.txt) | |
401 | */ | |
402 | s->s3->need_empty_fragments = 1; | |
82b0bf0b | 403 | |
0f113f3e MC |
404 | if (s->session->cipher != NULL) { |
405 | if (s->session->cipher->algorithm_enc == SSL_eNULL) | |
406 | s->s3->need_empty_fragments = 0; | |
c21506ba | 407 | |
82b0bf0b | 408 | #ifndef OPENSSL_NO_RC4 |
0f113f3e MC |
409 | if (s->session->cipher->algorithm_enc == SSL_RC4) |
410 | s->s3->need_empty_fragments = 0; | |
82b0bf0b | 411 | #endif |
0f113f3e MC |
412 | } |
413 | } | |
d02b48c6 | 414 | |
0f113f3e MC |
415 | return ret; |
416 | ||
417 | err: | |
418 | SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK, ERR_R_MALLOC_FAILURE); | |
419 | return (0); | |
420 | } | |
d02b48c6 | 421 | |
6b691a5c | 422 | void ssl3_cleanup_key_block(SSL *s) |
0f113f3e | 423 | { |
4b45c6e5 RS |
424 | OPENSSL_clear_free(s->s3->tmp.key_block, s->s3->tmp.key_block_length); |
425 | s->s3->tmp.key_block = NULL; | |
0f113f3e MC |
426 | s->s3->tmp.key_block_length = 0; |
427 | } | |
d02b48c6 | 428 | |
6b691a5c | 429 | void ssl3_init_finished_mac(SSL *s) |
0f113f3e | 430 | { |
85fb6fda | 431 | ssl3_free_digest_list(s); |
0f113f3e MC |
432 | s->s3->handshake_buffer = BIO_new(BIO_s_mem()); |
433 | (void)BIO_set_close(s->s3->handshake_buffer, BIO_CLOSE); | |
434 | } | |
435 | ||
c7238204 DSH |
436 | /* |
437 | * Free digest list. Also frees handshake buffer since they are always freed | |
438 | * together. | |
439 | */ | |
440 | ||
0f113f3e MC |
441 | void ssl3_free_digest_list(SSL *s) |
442 | { | |
c7238204 DSH |
443 | BIO_free(s->s3->handshake_buffer); |
444 | s->s3->handshake_buffer = NULL; | |
bfb0641f | 445 | EVP_MD_CTX_free(s->s3->handshake_dgst); |
0f113f3e MC |
446 | s->s3->handshake_dgst = NULL; |
447 | } | |
81025661 | 448 | |
6b691a5c | 449 | void ssl3_finish_mac(SSL *s, const unsigned char *buf, int len) |
0f113f3e | 450 | { |
28ba2541 | 451 | if (s->s3->handshake_dgst == NULL) |
0f113f3e | 452 | BIO_write(s->s3->handshake_buffer, (void *)buf, len); |
28ba2541 DSH |
453 | else |
454 | EVP_DigestUpdate(s->s3->handshake_dgst, buf, len); | |
0f113f3e | 455 | } |
6ba71a71 | 456 | |
124037fd | 457 | int ssl3_digest_cached_records(SSL *s, int keep) |
0f113f3e | 458 | { |
0f113f3e MC |
459 | const EVP_MD *md; |
460 | long hdatalen; | |
461 | void *hdata; | |
462 | ||
0f113f3e | 463 | if (s->s3->handshake_dgst == NULL) { |
124037fd DSH |
464 | hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata); |
465 | if (hdatalen <= 0) { | |
466 | SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS, SSL_R_BAD_HANDSHAKE_LENGTH); | |
467 | return 0; | |
468 | } | |
0f113f3e | 469 | |
bfb0641f | 470 | s->s3->handshake_dgst = EVP_MD_CTX_new(); |
28ba2541 DSH |
471 | if (s->s3->handshake_dgst == NULL) { |
472 | SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS, ERR_R_MALLOC_FAILURE); | |
473 | return 0; | |
474 | } | |
475 | ||
476 | md = ssl_handshake_md(s); | |
477 | if (md == NULL) { | |
478 | SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS, ERR_R_INTERNAL_ERROR); | |
479 | return 0; | |
0f113f3e | 480 | } |
124037fd | 481 | |
28ba2541 DSH |
482 | EVP_DigestInit_ex(s->s3->handshake_dgst, md, NULL); |
483 | EVP_DigestUpdate(s->s3->handshake_dgst, hdata, hdatalen); | |
484 | ||
0f113f3e | 485 | } |
124037fd | 486 | if (keep == 0) { |
0f113f3e MC |
487 | BIO_free(s->s3->handshake_buffer); |
488 | s->s3->handshake_buffer = NULL; | |
489 | } | |
490 | ||
491 | return 1; | |
492 | } | |
6ba71a71 | 493 | |
28ba2541 | 494 | int ssl3_final_finish_mac(SSL *s, const char *sender, int len, unsigned char *p) |
0f113f3e | 495 | { |
28ba2541 | 496 | int ret; |
6e59a892 | 497 | EVP_MD_CTX *ctx = NULL; |
0f113f3e | 498 | |
124037fd DSH |
499 | if (!ssl3_digest_cached_records(s, 0)) |
500 | return 0; | |
0f113f3e | 501 | |
28ba2541 | 502 | if (EVP_MD_CTX_type(s->s3->handshake_dgst) != NID_md5_sha1) { |
600fdc71 | 503 | SSLerr(SSL_F_SSL3_FINAL_FINISH_MAC, SSL_R_NO_REQUIRED_DIGEST); |
0f113f3e MC |
504 | return 0; |
505 | } | |
28ba2541 | 506 | |
bfb0641f | 507 | ctx = EVP_MD_CTX_new(); |
6e59a892 RL |
508 | if (ctx == NULL) { |
509 | SSLerr(SSL_F_SSL3_FINAL_FINISH_MAC, ERR_R_MALLOC_FAILURE); | |
510 | return 0; | |
511 | } | |
512 | EVP_MD_CTX_copy_ex(ctx, s->s3->handshake_dgst); | |
28ba2541 | 513 | |
6e59a892 | 514 | ret = EVP_MD_CTX_size(ctx); |
28ba2541 | 515 | if (ret < 0) { |
bfb0641f | 516 | EVP_MD_CTX_reset(ctx); |
0f113f3e | 517 | return 0; |
28ba2541 | 518 | } |
0f113f3e | 519 | |
6e59a892 RL |
520 | if ((sender != NULL && EVP_DigestUpdate(ctx, sender, len) <= 0) |
521 | || EVP_MD_CTX_ctrl(ctx, EVP_CTRL_SSL3_MASTER_SECRET, | |
28ba2541 DSH |
522 | s->session->master_key_length, |
523 | s->session->master_key) <= 0 | |
6e59a892 | 524 | || EVP_DigestFinal_ex(ctx, p, NULL) <= 0) { |
600fdc71 | 525 | SSLerr(SSL_F_SSL3_FINAL_FINISH_MAC, ERR_R_INTERNAL_ERROR); |
5f3d93e4 MC |
526 | ret = 0; |
527 | } | |
0f113f3e | 528 | |
bfb0641f | 529 | EVP_MD_CTX_free(ctx); |
0f113f3e | 530 | |
28ba2541 | 531 | return ret; |
0f113f3e | 532 | } |
d02b48c6 | 533 | |
6b691a5c | 534 | int ssl3_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p, |
0f113f3e MC |
535 | int len) |
536 | { | |
537 | static const unsigned char *salt[3] = { | |
ca570cfd | 538 | #ifndef CHARSET_EBCDIC |
0f113f3e MC |
539 | (const unsigned char *)"A", |
540 | (const unsigned char *)"BB", | |
541 | (const unsigned char *)"CCC", | |
ca570cfd | 542 | #else |
0f113f3e MC |
543 | (const unsigned char *)"\x41", |
544 | (const unsigned char *)"\x42\x42", | |
545 | (const unsigned char *)"\x43\x43\x43", | |
ca570cfd | 546 | #endif |
0f113f3e MC |
547 | }; |
548 | unsigned char buf[EVP_MAX_MD_SIZE]; | |
bfb0641f | 549 | EVP_MD_CTX *ctx = EVP_MD_CTX_new(); |
0f113f3e MC |
550 | int i, ret = 0; |
551 | unsigned int n; | |
81f57e5a | 552 | #ifdef OPENSSL_SSL_TRACE_CRYPTO |
0f113f3e | 553 | unsigned char *tmpout = out; |
1cf218bc | 554 | #endif |
d02b48c6 | 555 | |
6e59a892 RL |
556 | if (ctx == NULL) { |
557 | SSLerr(SSL_F_SSL3_GENERATE_MASTER_SECRET, ERR_R_MALLOC_FAILURE); | |
558 | return 0; | |
559 | } | |
0f113f3e | 560 | for (i = 0; i < 3; i++) { |
6e59a892 RL |
561 | if (EVP_DigestInit_ex(ctx, s->ctx->sha1, NULL) <= 0 |
562 | || EVP_DigestUpdate(ctx, salt[i], | |
5f3d93e4 | 563 | strlen((const char *)salt[i])) <= 0 |
6e59a892 RL |
564 | || EVP_DigestUpdate(ctx, p, len) <= 0 |
565 | || EVP_DigestUpdate(ctx, &(s->s3->client_random[0]), | |
5f3d93e4 | 566 | SSL3_RANDOM_SIZE) <= 0 |
6e59a892 | 567 | || EVP_DigestUpdate(ctx, &(s->s3->server_random[0]), |
5f3d93e4 | 568 | SSL3_RANDOM_SIZE) <= 0 |
6e59a892 | 569 | || EVP_DigestFinal_ex(ctx, buf, &n) <= 0 |
5f3d93e4 | 570 | |
6e59a892 RL |
571 | || EVP_DigestInit_ex(ctx, s->ctx->md5, NULL) <= 0 |
572 | || EVP_DigestUpdate(ctx, p, len) <= 0 | |
573 | || EVP_DigestUpdate(ctx, buf, n) <= 0 | |
574 | || EVP_DigestFinal_ex(ctx, out, &n) <= 0) { | |
5f3d93e4 MC |
575 | SSLerr(SSL_F_SSL3_GENERATE_MASTER_SECRET, ERR_R_INTERNAL_ERROR); |
576 | ret = 0; | |
577 | break; | |
578 | } | |
0f113f3e MC |
579 | out += n; |
580 | ret += n; | |
581 | } | |
bfb0641f | 582 | EVP_MD_CTX_free(ctx); |
1cf218bc | 583 | |
81f57e5a | 584 | #ifdef OPENSSL_SSL_TRACE_CRYPTO |
5f3d93e4 | 585 | if (ret > 0 && s->msg_callback) { |
0f113f3e MC |
586 | s->msg_callback(2, s->version, TLS1_RT_CRYPTO_PREMASTER, |
587 | p, len, s, s->msg_callback_arg); | |
588 | s->msg_callback(2, s->version, TLS1_RT_CRYPTO_CLIENT_RANDOM, | |
589 | s->s3->client_random, SSL3_RANDOM_SIZE, | |
590 | s, s->msg_callback_arg); | |
591 | s->msg_callback(2, s->version, TLS1_RT_CRYPTO_SERVER_RANDOM, | |
592 | s->s3->server_random, SSL3_RANDOM_SIZE, | |
593 | s, s->msg_callback_arg); | |
594 | s->msg_callback(2, s->version, TLS1_RT_CRYPTO_MASTER, | |
595 | tmpout, SSL3_MASTER_SECRET_SIZE, | |
596 | s, s->msg_callback_arg); | |
597 | } | |
1cf218bc | 598 | #endif |
e0f9bf1d | 599 | OPENSSL_cleanse(buf, sizeof(buf)); |
0f113f3e MC |
600 | return (ret); |
601 | } | |
d02b48c6 | 602 | |
6b691a5c | 603 | int ssl3_alert_code(int code) |
0f113f3e MC |
604 | { |
605 | switch (code) { | |
606 | case SSL_AD_CLOSE_NOTIFY: | |
607 | return (SSL3_AD_CLOSE_NOTIFY); | |
608 | case SSL_AD_UNEXPECTED_MESSAGE: | |
609 | return (SSL3_AD_UNEXPECTED_MESSAGE); | |
610 | case SSL_AD_BAD_RECORD_MAC: | |
611 | return (SSL3_AD_BAD_RECORD_MAC); | |
612 | case SSL_AD_DECRYPTION_FAILED: | |
613 | return (SSL3_AD_BAD_RECORD_MAC); | |
614 | case SSL_AD_RECORD_OVERFLOW: | |
615 | return (SSL3_AD_BAD_RECORD_MAC); | |
616 | case SSL_AD_DECOMPRESSION_FAILURE: | |
617 | return (SSL3_AD_DECOMPRESSION_FAILURE); | |
618 | case SSL_AD_HANDSHAKE_FAILURE: | |
619 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
620 | case SSL_AD_NO_CERTIFICATE: | |
621 | return (SSL3_AD_NO_CERTIFICATE); | |
622 | case SSL_AD_BAD_CERTIFICATE: | |
623 | return (SSL3_AD_BAD_CERTIFICATE); | |
624 | case SSL_AD_UNSUPPORTED_CERTIFICATE: | |
625 | return (SSL3_AD_UNSUPPORTED_CERTIFICATE); | |
626 | case SSL_AD_CERTIFICATE_REVOKED: | |
627 | return (SSL3_AD_CERTIFICATE_REVOKED); | |
628 | case SSL_AD_CERTIFICATE_EXPIRED: | |
629 | return (SSL3_AD_CERTIFICATE_EXPIRED); | |
630 | case SSL_AD_CERTIFICATE_UNKNOWN: | |
631 | return (SSL3_AD_CERTIFICATE_UNKNOWN); | |
632 | case SSL_AD_ILLEGAL_PARAMETER: | |
633 | return (SSL3_AD_ILLEGAL_PARAMETER); | |
634 | case SSL_AD_UNKNOWN_CA: | |
635 | return (SSL3_AD_BAD_CERTIFICATE); | |
636 | case SSL_AD_ACCESS_DENIED: | |
637 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
638 | case SSL_AD_DECODE_ERROR: | |
639 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
640 | case SSL_AD_DECRYPT_ERROR: | |
641 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
642 | case SSL_AD_EXPORT_RESTRICTION: | |
643 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
644 | case SSL_AD_PROTOCOL_VERSION: | |
645 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
646 | case SSL_AD_INSUFFICIENT_SECURITY: | |
647 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
648 | case SSL_AD_INTERNAL_ERROR: | |
649 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
650 | case SSL_AD_USER_CANCELLED: | |
651 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
652 | case SSL_AD_NO_RENEGOTIATION: | |
653 | return (-1); /* Don't send it :-) */ | |
654 | case SSL_AD_UNSUPPORTED_EXTENSION: | |
655 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
656 | case SSL_AD_CERTIFICATE_UNOBTAINABLE: | |
657 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
658 | case SSL_AD_UNRECOGNIZED_NAME: | |
659 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
660 | case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: | |
661 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
662 | case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: | |
663 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
664 | case SSL_AD_UNKNOWN_PSK_IDENTITY: | |
665 | return (TLS1_AD_UNKNOWN_PSK_IDENTITY); | |
666 | case SSL_AD_INAPPROPRIATE_FALLBACK: | |
667 | return (TLS1_AD_INAPPROPRIATE_FALLBACK); | |
06217867 EK |
668 | case SSL_AD_NO_APPLICATION_PROTOCOL: |
669 | return (TLS1_AD_NO_APPLICATION_PROTOCOL); | |
0f113f3e MC |
670 | default: |
671 | return (-1); | |
672 | } | |
673 | } |