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d02b48c6 | 1 | /* ssl/s3_enc.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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. | |
0f113f3e | 8 | * |
d02b48c6 RE |
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). | |
0f113f3e | 15 | * |
d02b48c6 RE |
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. | |
0f113f3e | 22 | * |
d02b48c6 RE |
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 :-). | |
0f113f3e | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 40 | * |
d02b48c6 RE |
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. | |
0f113f3e | 52 | * |
d02b48c6 RE |
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 | */ | |
82b0bf0b | 58 | /* ==================================================================== |
52b8dad8 | 59 | * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. |
82b0bf0b BM |
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 | |
0f113f3e | 66 | * notice, this list of conditions and the following disclaimer. |
82b0bf0b BM |
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 | */ | |
ddac1974 NL |
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 | */ | |
d02b48c6 RE |
137 | |
138 | #include <stdio.h> | |
d02b48c6 | 139 | #include "ssl_locl.h" |
7b63c0fa | 140 | #include <openssl/evp.h> |
dbad1690 | 141 | #include <openssl/md5.h> |
d02b48c6 | 142 | |
027e257b | 143 | static int ssl3_generate_key_block(SSL *s, unsigned char *km, int num) |
0f113f3e | 144 | { |
6e59a892 RL |
145 | EVP_MD_CTX *m5; |
146 | EVP_MD_CTX *s1; | |
0f113f3e MC |
147 | unsigned char buf[16], smd[SHA_DIGEST_LENGTH]; |
148 | unsigned char c = 'A'; | |
149 | unsigned int i, j, k; | |
6e59a892 | 150 | int ret = 0; |
58964a49 | 151 | |
ca570cfd | 152 | #ifdef CHARSET_EBCDIC |
0f113f3e | 153 | c = os_toascii[c]; /* 'A' in ASCII */ |
ca570cfd | 154 | #endif |
0f113f3e | 155 | k = 0; |
bfb0641f RL |
156 | m5 = EVP_MD_CTX_new(); |
157 | s1 = EVP_MD_CTX_new(); | |
6e59a892 RL |
158 | if (m5 == NULL || s1 == NULL) { |
159 | SSLerr(SSL_F_SSL3_GENERATE_KEY_BLOCK, ERR_R_MALLOC_FAILURE); | |
160 | goto err; | |
161 | } | |
162 | EVP_MD_CTX_set_flags(m5, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); | |
0f113f3e MC |
163 | for (i = 0; (int)i < num; i += MD5_DIGEST_LENGTH) { |
164 | k++; | |
165 | if (k > sizeof buf) { | |
166 | /* bug: 'buf' is too small for this ciphersuite */ | |
167 | SSLerr(SSL_F_SSL3_GENERATE_KEY_BLOCK, ERR_R_INTERNAL_ERROR); | |
168 | return 0; | |
169 | } | |
170 | ||
171 | for (j = 0; j < k; j++) | |
172 | buf[j] = c; | |
173 | c++; | |
6e59a892 RL |
174 | EVP_DigestInit_ex(s1, EVP_sha1(), NULL); |
175 | EVP_DigestUpdate(s1, buf, k); | |
176 | EVP_DigestUpdate(s1, s->session->master_key, | |
0f113f3e | 177 | s->session->master_key_length); |
6e59a892 RL |
178 | EVP_DigestUpdate(s1, s->s3->server_random, SSL3_RANDOM_SIZE); |
179 | EVP_DigestUpdate(s1, s->s3->client_random, SSL3_RANDOM_SIZE); | |
180 | EVP_DigestFinal_ex(s1, smd, NULL); | |
0f113f3e | 181 | |
6e59a892 RL |
182 | EVP_DigestInit_ex(m5, EVP_md5(), NULL); |
183 | EVP_DigestUpdate(m5, s->session->master_key, | |
0f113f3e | 184 | s->session->master_key_length); |
6e59a892 | 185 | EVP_DigestUpdate(m5, smd, SHA_DIGEST_LENGTH); |
0f113f3e | 186 | if ((int)(i + MD5_DIGEST_LENGTH) > num) { |
6e59a892 | 187 | EVP_DigestFinal_ex(m5, smd, NULL); |
0f113f3e MC |
188 | memcpy(km, smd, (num - i)); |
189 | } else | |
6e59a892 | 190 | EVP_DigestFinal_ex(m5, km, NULL); |
0f113f3e MC |
191 | |
192 | km += MD5_DIGEST_LENGTH; | |
193 | } | |
e0f9bf1d | 194 | OPENSSL_cleanse(smd, sizeof(smd)); |
6e59a892 RL |
195 | ret = 1; |
196 | err: | |
bfb0641f RL |
197 | EVP_MD_CTX_free(m5); |
198 | EVP_MD_CTX_free(s1); | |
6e59a892 | 199 | return ret; |
0f113f3e | 200 | } |
58964a49 | 201 | |
6b691a5c | 202 | int ssl3_change_cipher_state(SSL *s, int which) |
0f113f3e MC |
203 | { |
204 | unsigned char *p, *mac_secret; | |
205 | unsigned char exp_key[EVP_MAX_KEY_LENGTH]; | |
206 | unsigned char exp_iv[EVP_MAX_IV_LENGTH]; | |
361a1191 | 207 | unsigned char *ms, *key, *iv; |
0f113f3e MC |
208 | EVP_CIPHER_CTX *dd; |
209 | const EVP_CIPHER *c; | |
09b6c2ef | 210 | #ifndef OPENSSL_NO_COMP |
0f113f3e | 211 | COMP_METHOD *comp; |
09b6c2ef | 212 | #endif |
0f113f3e | 213 | const EVP_MD *m; |
361a1191 | 214 | int n, i, j, k, cl; |
0f113f3e MC |
215 | int reuse_dd = 0; |
216 | ||
0f113f3e MC |
217 | c = s->s3->tmp.new_sym_enc; |
218 | m = s->s3->tmp.new_hash; | |
219 | /* m == NULL will lead to a crash later */ | |
220 | OPENSSL_assert(m); | |
09b6c2ef | 221 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
222 | if (s->s3->tmp.new_compression == NULL) |
223 | comp = NULL; | |
224 | else | |
225 | comp = s->s3->tmp.new_compression->method; | |
09b6c2ef | 226 | #endif |
d02b48c6 | 227 | |
0f113f3e MC |
228 | if (which & SSL3_CC_READ) { |
229 | if (s->enc_read_ctx != NULL) | |
230 | reuse_dd = 1; | |
231 | else if ((s->enc_read_ctx = | |
b4faea50 | 232 | OPENSSL_malloc(sizeof(*s->enc_read_ctx))) == NULL) |
0f113f3e MC |
233 | goto err; |
234 | else | |
235 | /* | |
236 | * make sure it's intialized in case we exit later with an error | |
237 | */ | |
238 | EVP_CIPHER_CTX_init(s->enc_read_ctx); | |
239 | dd = s->enc_read_ctx; | |
240 | ||
5f3d93e4 | 241 | if (ssl_replace_hash(&s->read_hash, m) == NULL) { |
69f68237 MC |
242 | SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR); |
243 | goto err2; | |
244 | } | |
09b6c2ef | 245 | #ifndef OPENSSL_NO_COMP |
0f113f3e | 246 | /* COMPRESS */ |
efa7dd64 RS |
247 | COMP_CTX_free(s->expand); |
248 | s->expand = NULL; | |
0f113f3e MC |
249 | if (comp != NULL) { |
250 | s->expand = COMP_CTX_new(comp); | |
251 | if (s->expand == NULL) { | |
252 | SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE, | |
253 | SSL_R_COMPRESSION_LIBRARY_ERROR); | |
254 | goto err2; | |
255 | } | |
61986d32 | 256 | if (!RECORD_LAYER_setup_comp_buffer(&s->rlayer)) |
0f113f3e MC |
257 | goto err; |
258 | } | |
09b6c2ef | 259 | #endif |
de07f311 | 260 | RECORD_LAYER_reset_read_sequence(&s->rlayer); |
0f113f3e MC |
261 | mac_secret = &(s->s3->read_mac_secret[0]); |
262 | } else { | |
263 | if (s->enc_write_ctx != NULL) | |
264 | reuse_dd = 1; | |
265 | else if ((s->enc_write_ctx = | |
b4faea50 | 266 | OPENSSL_malloc(sizeof(*s->enc_write_ctx))) == NULL) |
0f113f3e MC |
267 | goto err; |
268 | else | |
269 | /* | |
270 | * make sure it's intialized in case we exit later with an error | |
271 | */ | |
272 | EVP_CIPHER_CTX_init(s->enc_write_ctx); | |
273 | dd = s->enc_write_ctx; | |
5f3d93e4 | 274 | if (ssl_replace_hash(&s->write_hash, m) == NULL) { |
69f68237 MC |
275 | SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR); |
276 | goto err2; | |
277 | } | |
09b6c2ef | 278 | #ifndef OPENSSL_NO_COMP |
0f113f3e | 279 | /* COMPRESS */ |
efa7dd64 RS |
280 | COMP_CTX_free(s->compress); |
281 | s->compress = NULL; | |
0f113f3e MC |
282 | if (comp != NULL) { |
283 | s->compress = COMP_CTX_new(comp); | |
284 | if (s->compress == NULL) { | |
285 | SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE, | |
286 | SSL_R_COMPRESSION_LIBRARY_ERROR); | |
287 | goto err2; | |
288 | } | |
289 | } | |
09b6c2ef | 290 | #endif |
de07f311 | 291 | RECORD_LAYER_reset_write_sequence(&s->rlayer); |
0f113f3e MC |
292 | mac_secret = &(s->s3->write_mac_secret[0]); |
293 | } | |
294 | ||
295 | if (reuse_dd) | |
296 | EVP_CIPHER_CTX_cleanup(dd); | |
297 | ||
298 | p = s->s3->tmp.key_block; | |
299 | i = EVP_MD_size(m); | |
300 | if (i < 0) | |
301 | goto err2; | |
302 | cl = EVP_CIPHER_key_length(c); | |
361a1191 | 303 | j = cl; |
0f113f3e MC |
304 | k = EVP_CIPHER_iv_length(c); |
305 | if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) || | |
306 | (which == SSL3_CHANGE_CIPHER_SERVER_READ)) { | |
307 | ms = &(p[0]); | |
308 | n = i + i; | |
309 | key = &(p[n]); | |
310 | n += j + j; | |
311 | iv = &(p[n]); | |
312 | n += k + k; | |
0f113f3e MC |
313 | } else { |
314 | n = i; | |
315 | ms = &(p[n]); | |
316 | n += i + j; | |
317 | key = &(p[n]); | |
318 | n += j + k; | |
319 | iv = &(p[n]); | |
320 | n += k; | |
0f113f3e MC |
321 | } |
322 | ||
323 | if (n > s->s3->tmp.key_block_length) { | |
324 | SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR); | |
325 | goto err2; | |
326 | } | |
327 | ||
0f113f3e | 328 | memcpy(mac_secret, ms, i); |
0f113f3e MC |
329 | |
330 | EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE)); | |
58964a49 | 331 | |
1cf218bc | 332 | #ifdef OPENSSL_SSL_TRACE_CRYPTO |
0f113f3e MC |
333 | if (s->msg_callback) { |
334 | ||
335 | int wh = which & SSL3_CC_WRITE ? | |
336 | TLS1_RT_CRYPTO_WRITE : TLS1_RT_CRYPTO_READ; | |
337 | s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_MAC, | |
338 | mac_secret, EVP_MD_size(m), s, s->msg_callback_arg); | |
339 | if (c->key_len) | |
340 | s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_KEY, | |
341 | key, c->key_len, s, s->msg_callback_arg); | |
342 | if (k) { | |
343 | s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_IV, | |
344 | iv, k, s, s->msg_callback_arg); | |
345 | } | |
346 | } | |
1cf218bc DSH |
347 | #endif |
348 | ||
e0f9bf1d RS |
349 | OPENSSL_cleanse(exp_key, sizeof(exp_key)); |
350 | OPENSSL_cleanse(exp_iv, sizeof(exp_iv)); | |
0f113f3e MC |
351 | return (1); |
352 | err: | |
353 | SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE, ERR_R_MALLOC_FAILURE); | |
354 | err2: | |
e0f9bf1d RS |
355 | OPENSSL_cleanse(exp_key, sizeof(exp_key)); |
356 | OPENSSL_cleanse(exp_iv, sizeof(exp_iv)); | |
0f113f3e MC |
357 | return (0); |
358 | } | |
d02b48c6 | 359 | |
6b691a5c | 360 | int ssl3_setup_key_block(SSL *s) |
0f113f3e MC |
361 | { |
362 | unsigned char *p; | |
363 | const EVP_CIPHER *c; | |
364 | const EVP_MD *hash; | |
365 | int num; | |
366 | int ret = 0; | |
367 | SSL_COMP *comp; | |
368 | ||
369 | if (s->s3->tmp.key_block_length != 0) | |
370 | return (1); | |
371 | ||
372 | if (!ssl_cipher_get_evp(s->session, &c, &hash, NULL, NULL, &comp, 0)) { | |
373 | SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK, SSL_R_CIPHER_OR_HASH_UNAVAILABLE); | |
374 | return (0); | |
375 | } | |
376 | ||
377 | s->s3->tmp.new_sym_enc = c; | |
378 | s->s3->tmp.new_hash = hash; | |
09b6c2ef | 379 | #ifdef OPENSSL_NO_COMP |
0f113f3e | 380 | s->s3->tmp.new_compression = NULL; |
09b6c2ef | 381 | #else |
0f113f3e | 382 | s->s3->tmp.new_compression = comp; |
09b6c2ef | 383 | #endif |
d02b48c6 | 384 | |
0f113f3e MC |
385 | num = EVP_MD_size(hash); |
386 | if (num < 0) | |
387 | return 0; | |
388 | ||
389 | num = EVP_CIPHER_key_length(c) + num + EVP_CIPHER_iv_length(c); | |
390 | num *= 2; | |
0eab41fb | 391 | |
0f113f3e | 392 | ssl3_cleanup_key_block(s); |
d02b48c6 | 393 | |
0f113f3e MC |
394 | if ((p = OPENSSL_malloc(num)) == NULL) |
395 | goto err; | |
d02b48c6 | 396 | |
0f113f3e MC |
397 | s->s3->tmp.key_block_length = num; |
398 | s->s3->tmp.key_block = p; | |
d02b48c6 | 399 | |
0f113f3e | 400 | ret = ssl3_generate_key_block(s, p, num); |
d02b48c6 | 401 | |
0f113f3e MC |
402 | if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) { |
403 | /* | |
404 | * enable vulnerability countermeasure for CBC ciphers with known-IV | |
405 | * problem (http://www.openssl.org/~bodo/tls-cbc.txt) | |
406 | */ | |
407 | s->s3->need_empty_fragments = 1; | |
82b0bf0b | 408 | |
0f113f3e MC |
409 | if (s->session->cipher != NULL) { |
410 | if (s->session->cipher->algorithm_enc == SSL_eNULL) | |
411 | s->s3->need_empty_fragments = 0; | |
c21506ba | 412 | |
82b0bf0b | 413 | #ifndef OPENSSL_NO_RC4 |
0f113f3e MC |
414 | if (s->session->cipher->algorithm_enc == SSL_RC4) |
415 | s->s3->need_empty_fragments = 0; | |
82b0bf0b | 416 | #endif |
0f113f3e MC |
417 | } |
418 | } | |
d02b48c6 | 419 | |
0f113f3e MC |
420 | return ret; |
421 | ||
422 | err: | |
423 | SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK, ERR_R_MALLOC_FAILURE); | |
424 | return (0); | |
425 | } | |
d02b48c6 | 426 | |
6b691a5c | 427 | void ssl3_cleanup_key_block(SSL *s) |
0f113f3e | 428 | { |
4b45c6e5 RS |
429 | OPENSSL_clear_free(s->s3->tmp.key_block, s->s3->tmp.key_block_length); |
430 | s->s3->tmp.key_block = NULL; | |
0f113f3e MC |
431 | s->s3->tmp.key_block_length = 0; |
432 | } | |
d02b48c6 | 433 | |
6b691a5c | 434 | void ssl3_init_finished_mac(SSL *s) |
0f113f3e | 435 | { |
85fb6fda | 436 | ssl3_free_digest_list(s); |
0f113f3e MC |
437 | s->s3->handshake_buffer = BIO_new(BIO_s_mem()); |
438 | (void)BIO_set_close(s->s3->handshake_buffer, BIO_CLOSE); | |
439 | } | |
440 | ||
c7238204 DSH |
441 | /* |
442 | * Free digest list. Also frees handshake buffer since they are always freed | |
443 | * together. | |
444 | */ | |
445 | ||
0f113f3e MC |
446 | void ssl3_free_digest_list(SSL *s) |
447 | { | |
c7238204 DSH |
448 | BIO_free(s->s3->handshake_buffer); |
449 | s->s3->handshake_buffer = NULL; | |
bfb0641f | 450 | EVP_MD_CTX_free(s->s3->handshake_dgst); |
0f113f3e MC |
451 | s->s3->handshake_dgst = NULL; |
452 | } | |
81025661 | 453 | |
6b691a5c | 454 | void ssl3_finish_mac(SSL *s, const unsigned char *buf, int len) |
0f113f3e | 455 | { |
28ba2541 | 456 | if (s->s3->handshake_dgst == NULL) |
0f113f3e | 457 | BIO_write(s->s3->handshake_buffer, (void *)buf, len); |
28ba2541 DSH |
458 | else |
459 | EVP_DigestUpdate(s->s3->handshake_dgst, buf, len); | |
0f113f3e | 460 | } |
6ba71a71 | 461 | |
124037fd | 462 | int ssl3_digest_cached_records(SSL *s, int keep) |
0f113f3e | 463 | { |
0f113f3e MC |
464 | const EVP_MD *md; |
465 | long hdatalen; | |
466 | void *hdata; | |
467 | ||
0f113f3e | 468 | if (s->s3->handshake_dgst == NULL) { |
124037fd DSH |
469 | hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata); |
470 | if (hdatalen <= 0) { | |
471 | SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS, SSL_R_BAD_HANDSHAKE_LENGTH); | |
472 | return 0; | |
473 | } | |
0f113f3e | 474 | |
bfb0641f | 475 | s->s3->handshake_dgst = EVP_MD_CTX_new(); |
28ba2541 DSH |
476 | if (s->s3->handshake_dgst == NULL) { |
477 | SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS, ERR_R_MALLOC_FAILURE); | |
478 | return 0; | |
479 | } | |
480 | ||
481 | md = ssl_handshake_md(s); | |
482 | if (md == NULL) { | |
483 | SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS, ERR_R_INTERNAL_ERROR); | |
484 | return 0; | |
0f113f3e | 485 | } |
124037fd | 486 | |
28ba2541 DSH |
487 | EVP_DigestInit_ex(s->s3->handshake_dgst, md, NULL); |
488 | EVP_DigestUpdate(s->s3->handshake_dgst, hdata, hdatalen); | |
489 | ||
0f113f3e | 490 | } |
124037fd | 491 | if (keep == 0) { |
0f113f3e MC |
492 | BIO_free(s->s3->handshake_buffer); |
493 | s->s3->handshake_buffer = NULL; | |
494 | } | |
495 | ||
496 | return 1; | |
497 | } | |
6ba71a71 | 498 | |
28ba2541 | 499 | int ssl3_final_finish_mac(SSL *s, const char *sender, int len, unsigned char *p) |
0f113f3e | 500 | { |
28ba2541 | 501 | int ret; |
6e59a892 | 502 | EVP_MD_CTX *ctx = NULL; |
0f113f3e | 503 | |
124037fd DSH |
504 | if (!ssl3_digest_cached_records(s, 0)) |
505 | return 0; | |
0f113f3e | 506 | |
28ba2541 | 507 | if (EVP_MD_CTX_type(s->s3->handshake_dgst) != NID_md5_sha1) { |
600fdc71 | 508 | SSLerr(SSL_F_SSL3_FINAL_FINISH_MAC, SSL_R_NO_REQUIRED_DIGEST); |
0f113f3e MC |
509 | return 0; |
510 | } | |
28ba2541 | 511 | |
bfb0641f | 512 | ctx = EVP_MD_CTX_new(); |
6e59a892 RL |
513 | if (ctx == NULL) { |
514 | SSLerr(SSL_F_SSL3_FINAL_FINISH_MAC, ERR_R_MALLOC_FAILURE); | |
515 | return 0; | |
516 | } | |
517 | EVP_MD_CTX_copy_ex(ctx, s->s3->handshake_dgst); | |
28ba2541 | 518 | |
6e59a892 | 519 | ret = EVP_MD_CTX_size(ctx); |
28ba2541 | 520 | if (ret < 0) { |
bfb0641f | 521 | EVP_MD_CTX_reset(ctx); |
0f113f3e | 522 | return 0; |
28ba2541 | 523 | } |
0f113f3e | 524 | |
6e59a892 RL |
525 | if ((sender != NULL && EVP_DigestUpdate(ctx, sender, len) <= 0) |
526 | || EVP_MD_CTX_ctrl(ctx, EVP_CTRL_SSL3_MASTER_SECRET, | |
28ba2541 DSH |
527 | s->session->master_key_length, |
528 | s->session->master_key) <= 0 | |
6e59a892 | 529 | || EVP_DigestFinal_ex(ctx, p, NULL) <= 0) { |
600fdc71 | 530 | SSLerr(SSL_F_SSL3_FINAL_FINISH_MAC, ERR_R_INTERNAL_ERROR); |
5f3d93e4 MC |
531 | ret = 0; |
532 | } | |
0f113f3e | 533 | |
bfb0641f | 534 | EVP_MD_CTX_free(ctx); |
0f113f3e | 535 | |
28ba2541 | 536 | return ret; |
0f113f3e | 537 | } |
d02b48c6 | 538 | |
6b691a5c | 539 | int ssl3_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p, |
0f113f3e MC |
540 | int len) |
541 | { | |
542 | static const unsigned char *salt[3] = { | |
ca570cfd | 543 | #ifndef CHARSET_EBCDIC |
0f113f3e MC |
544 | (const unsigned char *)"A", |
545 | (const unsigned char *)"BB", | |
546 | (const unsigned char *)"CCC", | |
ca570cfd | 547 | #else |
0f113f3e MC |
548 | (const unsigned char *)"\x41", |
549 | (const unsigned char *)"\x42\x42", | |
550 | (const unsigned char *)"\x43\x43\x43", | |
ca570cfd | 551 | #endif |
0f113f3e MC |
552 | }; |
553 | unsigned char buf[EVP_MAX_MD_SIZE]; | |
bfb0641f | 554 | EVP_MD_CTX *ctx = EVP_MD_CTX_new(); |
0f113f3e MC |
555 | int i, ret = 0; |
556 | unsigned int n; | |
81f57e5a | 557 | #ifdef OPENSSL_SSL_TRACE_CRYPTO |
0f113f3e | 558 | unsigned char *tmpout = out; |
1cf218bc | 559 | #endif |
d02b48c6 | 560 | |
6e59a892 RL |
561 | if (ctx == NULL) { |
562 | SSLerr(SSL_F_SSL3_GENERATE_MASTER_SECRET, ERR_R_MALLOC_FAILURE); | |
563 | return 0; | |
564 | } | |
0f113f3e | 565 | for (i = 0; i < 3; i++) { |
6e59a892 RL |
566 | if (EVP_DigestInit_ex(ctx, s->ctx->sha1, NULL) <= 0 |
567 | || EVP_DigestUpdate(ctx, salt[i], | |
5f3d93e4 | 568 | strlen((const char *)salt[i])) <= 0 |
6e59a892 RL |
569 | || EVP_DigestUpdate(ctx, p, len) <= 0 |
570 | || EVP_DigestUpdate(ctx, &(s->s3->client_random[0]), | |
5f3d93e4 | 571 | SSL3_RANDOM_SIZE) <= 0 |
6e59a892 | 572 | || EVP_DigestUpdate(ctx, &(s->s3->server_random[0]), |
5f3d93e4 | 573 | SSL3_RANDOM_SIZE) <= 0 |
6e59a892 | 574 | || EVP_DigestFinal_ex(ctx, buf, &n) <= 0 |
5f3d93e4 | 575 | |
6e59a892 RL |
576 | || EVP_DigestInit_ex(ctx, s->ctx->md5, NULL) <= 0 |
577 | || EVP_DigestUpdate(ctx, p, len) <= 0 | |
578 | || EVP_DigestUpdate(ctx, buf, n) <= 0 | |
579 | || EVP_DigestFinal_ex(ctx, out, &n) <= 0) { | |
5f3d93e4 MC |
580 | SSLerr(SSL_F_SSL3_GENERATE_MASTER_SECRET, ERR_R_INTERNAL_ERROR); |
581 | ret = 0; | |
582 | break; | |
583 | } | |
0f113f3e MC |
584 | out += n; |
585 | ret += n; | |
586 | } | |
bfb0641f | 587 | EVP_MD_CTX_free(ctx); |
1cf218bc | 588 | |
81f57e5a | 589 | #ifdef OPENSSL_SSL_TRACE_CRYPTO |
5f3d93e4 | 590 | if (ret > 0 && s->msg_callback) { |
0f113f3e MC |
591 | s->msg_callback(2, s->version, TLS1_RT_CRYPTO_PREMASTER, |
592 | p, len, s, s->msg_callback_arg); | |
593 | s->msg_callback(2, s->version, TLS1_RT_CRYPTO_CLIENT_RANDOM, | |
594 | s->s3->client_random, SSL3_RANDOM_SIZE, | |
595 | s, s->msg_callback_arg); | |
596 | s->msg_callback(2, s->version, TLS1_RT_CRYPTO_SERVER_RANDOM, | |
597 | s->s3->server_random, SSL3_RANDOM_SIZE, | |
598 | s, s->msg_callback_arg); | |
599 | s->msg_callback(2, s->version, TLS1_RT_CRYPTO_MASTER, | |
600 | tmpout, SSL3_MASTER_SECRET_SIZE, | |
601 | s, s->msg_callback_arg); | |
602 | } | |
1cf218bc | 603 | #endif |
e0f9bf1d | 604 | OPENSSL_cleanse(buf, sizeof(buf)); |
0f113f3e MC |
605 | return (ret); |
606 | } | |
d02b48c6 | 607 | |
6b691a5c | 608 | int ssl3_alert_code(int code) |
0f113f3e MC |
609 | { |
610 | switch (code) { | |
611 | case SSL_AD_CLOSE_NOTIFY: | |
612 | return (SSL3_AD_CLOSE_NOTIFY); | |
613 | case SSL_AD_UNEXPECTED_MESSAGE: | |
614 | return (SSL3_AD_UNEXPECTED_MESSAGE); | |
615 | case SSL_AD_BAD_RECORD_MAC: | |
616 | return (SSL3_AD_BAD_RECORD_MAC); | |
617 | case SSL_AD_DECRYPTION_FAILED: | |
618 | return (SSL3_AD_BAD_RECORD_MAC); | |
619 | case SSL_AD_RECORD_OVERFLOW: | |
620 | return (SSL3_AD_BAD_RECORD_MAC); | |
621 | case SSL_AD_DECOMPRESSION_FAILURE: | |
622 | return (SSL3_AD_DECOMPRESSION_FAILURE); | |
623 | case SSL_AD_HANDSHAKE_FAILURE: | |
624 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
625 | case SSL_AD_NO_CERTIFICATE: | |
626 | return (SSL3_AD_NO_CERTIFICATE); | |
627 | case SSL_AD_BAD_CERTIFICATE: | |
628 | return (SSL3_AD_BAD_CERTIFICATE); | |
629 | case SSL_AD_UNSUPPORTED_CERTIFICATE: | |
630 | return (SSL3_AD_UNSUPPORTED_CERTIFICATE); | |
631 | case SSL_AD_CERTIFICATE_REVOKED: | |
632 | return (SSL3_AD_CERTIFICATE_REVOKED); | |
633 | case SSL_AD_CERTIFICATE_EXPIRED: | |
634 | return (SSL3_AD_CERTIFICATE_EXPIRED); | |
635 | case SSL_AD_CERTIFICATE_UNKNOWN: | |
636 | return (SSL3_AD_CERTIFICATE_UNKNOWN); | |
637 | case SSL_AD_ILLEGAL_PARAMETER: | |
638 | return (SSL3_AD_ILLEGAL_PARAMETER); | |
639 | case SSL_AD_UNKNOWN_CA: | |
640 | return (SSL3_AD_BAD_CERTIFICATE); | |
641 | case SSL_AD_ACCESS_DENIED: | |
642 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
643 | case SSL_AD_DECODE_ERROR: | |
644 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
645 | case SSL_AD_DECRYPT_ERROR: | |
646 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
647 | case SSL_AD_EXPORT_RESTRICTION: | |
648 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
649 | case SSL_AD_PROTOCOL_VERSION: | |
650 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
651 | case SSL_AD_INSUFFICIENT_SECURITY: | |
652 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
653 | case SSL_AD_INTERNAL_ERROR: | |
654 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
655 | case SSL_AD_USER_CANCELLED: | |
656 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
657 | case SSL_AD_NO_RENEGOTIATION: | |
658 | return (-1); /* Don't send it :-) */ | |
659 | case SSL_AD_UNSUPPORTED_EXTENSION: | |
660 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
661 | case SSL_AD_CERTIFICATE_UNOBTAINABLE: | |
662 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
663 | case SSL_AD_UNRECOGNIZED_NAME: | |
664 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
665 | case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: | |
666 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
667 | case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: | |
668 | return (SSL3_AD_HANDSHAKE_FAILURE); | |
669 | case SSL_AD_UNKNOWN_PSK_IDENTITY: | |
670 | return (TLS1_AD_UNKNOWN_PSK_IDENTITY); | |
671 | case SSL_AD_INAPPROPRIATE_FALLBACK: | |
672 | return (TLS1_AD_INAPPROPRIATE_FALLBACK); | |
673 | default: | |
674 | return (-1); | |
675 | } | |
676 | } |