]>
Commit | Line | Data |
---|---|---|
846e33c7 | 1 | /* |
b0edda11 | 2 | * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved. |
c80149d9 | 3 | * Copyright 2005 Nokia. All rights reserved. |
82b0bf0b | 4 | * |
846e33c7 RS |
5 | * Licensed under the OpenSSL license (the "License"). You may not use |
6 | * this file except in compliance with the License. You can obtain a copy | |
7 | * in the file LICENSE in the source distribution or at | |
8 | * https://www.openssl.org/source/license.html | |
82b0bf0b | 9 | */ |
846e33c7 | 10 | |
58964a49 | 11 | #include <stdio.h> |
7b63c0fa | 12 | #include "ssl_locl.h" |
3c27208f | 13 | #include <openssl/comp.h> |
ec577822 | 14 | #include <openssl/evp.h> |
b7d60e76 | 15 | #include <openssl/kdf.h> |
637f374a | 16 | #include <openssl/rand.h> |
58964a49 | 17 | |
b7d60e76 | 18 | /* seed1 through seed5 are concatenated */ |
28ba2541 | 19 | static int tls1_PRF(SSL *s, |
6db6bc5a MC |
20 | const void *seed1, size_t seed1_len, |
21 | const void *seed2, size_t seed2_len, | |
22 | const void *seed3, size_t seed3_len, | |
23 | const void *seed4, size_t seed4_len, | |
24 | const void *seed5, size_t seed5_len, | |
25 | const unsigned char *sec, size_t slen, | |
d4d2f3a4 | 26 | unsigned char *out, size_t olen, int fatal) |
0f113f3e | 27 | { |
28ba2541 | 28 | const EVP_MD *md = ssl_prf_md(s); |
b7d60e76 | 29 | EVP_PKEY_CTX *pctx = NULL; |
b7d60e76 | 30 | int ret = 0; |
0f113f3e | 31 | |
28ba2541 | 32 | if (md == NULL) { |
668f6f08 | 33 | /* Should never happen */ |
d4d2f3a4 MC |
34 | if (fatal) |
35 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_PRF, | |
36 | ERR_R_INTERNAL_ERROR); | |
37 | else | |
38 | SSLerr(SSL_F_TLS1_PRF, ERR_R_INTERNAL_ERROR); | |
28ba2541 | 39 | return 0; |
668f6f08 | 40 | } |
b7d60e76 DSH |
41 | pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_TLS1_PRF, NULL); |
42 | if (pctx == NULL || EVP_PKEY_derive_init(pctx) <= 0 | |
43 | || EVP_PKEY_CTX_set_tls1_prf_md(pctx, md) <= 0 | |
d4d2f3a4 MC |
44 | || EVP_PKEY_CTX_set1_tls1_prf_secret(pctx, sec, (int)slen) <= 0 |
45 | || EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed1, (int)seed1_len) <= 0 | |
46 | || EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed2, (int)seed2_len) <= 0 | |
47 | || EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed3, (int)seed3_len) <= 0 | |
48 | || EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed4, (int)seed4_len) <= 0 | |
49 | || EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed5, (int)seed5_len) <= 0 | |
50 | || EVP_PKEY_derive(pctx, out, &olen) <= 0) { | |
51 | if (fatal) | |
52 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_PRF, | |
53 | ERR_R_INTERNAL_ERROR); | |
54 | else | |
55 | SSLerr(SSL_F_TLS1_PRF, ERR_R_INTERNAL_ERROR); | |
b7d60e76 | 56 | goto err; |
d4d2f3a4 | 57 | } |
b7d60e76 | 58 | |
b7d60e76 DSH |
59 | ret = 1; |
60 | ||
a230b26e | 61 | err: |
b7d60e76 DSH |
62 | EVP_PKEY_CTX_free(pctx); |
63 | return ret; | |
81025661 | 64 | } |
0f113f3e | 65 | |
8c1a5343 | 66 | static int tls1_generate_key_block(SSL *s, unsigned char *km, size_t num) |
0f113f3e MC |
67 | { |
68 | int ret; | |
d4d2f3a4 MC |
69 | |
70 | /* Calls SSLfatal() as required */ | |
28ba2541 | 71 | ret = tls1_PRF(s, |
0f113f3e MC |
72 | TLS_MD_KEY_EXPANSION_CONST, |
73 | TLS_MD_KEY_EXPANSION_CONST_SIZE, s->s3->server_random, | |
74 | SSL3_RANDOM_SIZE, s->s3->client_random, SSL3_RANDOM_SIZE, | |
75 | NULL, 0, NULL, 0, s->session->master_key, | |
d4d2f3a4 | 76 | s->session->master_key_length, km, num, 1); |
55a9a16f | 77 | |
0f113f3e MC |
78 | return ret; |
79 | } | |
58964a49 | 80 | |
6b691a5c | 81 | int tls1_change_cipher_state(SSL *s, int which) |
0f113f3e | 82 | { |
0f113f3e | 83 | unsigned char *p, *mac_secret; |
0f113f3e MC |
84 | unsigned char tmp1[EVP_MAX_KEY_LENGTH]; |
85 | unsigned char tmp2[EVP_MAX_KEY_LENGTH]; | |
86 | unsigned char iv1[EVP_MAX_IV_LENGTH * 2]; | |
87 | unsigned char iv2[EVP_MAX_IV_LENGTH * 2]; | |
88 | unsigned char *ms, *key, *iv; | |
0f113f3e MC |
89 | EVP_CIPHER_CTX *dd; |
90 | const EVP_CIPHER *c; | |
09b6c2ef | 91 | #ifndef OPENSSL_NO_COMP |
0f113f3e | 92 | const SSL_COMP *comp; |
09b6c2ef | 93 | #endif |
0f113f3e MC |
94 | const EVP_MD *m; |
95 | int mac_type; | |
b43d1cbb | 96 | size_t *mac_secret_size; |
0f113f3e MC |
97 | EVP_MD_CTX *mac_ctx; |
98 | EVP_PKEY *mac_key; | |
b43d1cbb | 99 | size_t n, i, j, k, cl; |
0f113f3e MC |
100 | int reuse_dd = 0; |
101 | ||
0f113f3e MC |
102 | c = s->s3->tmp.new_sym_enc; |
103 | m = s->s3->tmp.new_hash; | |
104 | mac_type = s->s3->tmp.new_mac_pkey_type; | |
09b6c2ef | 105 | #ifndef OPENSSL_NO_COMP |
0f113f3e | 106 | comp = s->s3->tmp.new_compression; |
09b6c2ef | 107 | #endif |
58964a49 | 108 | |
0f113f3e | 109 | if (which & SSL3_CC_READ) { |
28a31a0a MC |
110 | if (s->ext.use_etm) |
111 | s->s3->flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_READ; | |
112 | else | |
113 | s->s3->flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_READ; | |
114 | ||
0f113f3e MC |
115 | if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC) |
116 | s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM; | |
117 | else | |
118 | s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM; | |
119 | ||
f63a17d6 | 120 | if (s->enc_read_ctx != NULL) { |
0f113f3e | 121 | reuse_dd = 1; |
f63a17d6 MC |
122 | } else if ((s->enc_read_ctx = EVP_CIPHER_CTX_new()) == NULL) { |
123 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE, | |
124 | ERR_R_MALLOC_FAILURE); | |
0f113f3e | 125 | goto err; |
f63a17d6 | 126 | } else { |
0f113f3e | 127 | /* |
f430ba31 | 128 | * make sure it's initialised in case we exit later with an error |
0f113f3e | 129 | */ |
846ec07d | 130 | EVP_CIPHER_CTX_reset(s->enc_read_ctx); |
f63a17d6 | 131 | } |
0f113f3e MC |
132 | dd = s->enc_read_ctx; |
133 | mac_ctx = ssl_replace_hash(&s->read_hash, NULL); | |
5f3d93e4 MC |
134 | if (mac_ctx == NULL) |
135 | goto err; | |
09b6c2ef | 136 | #ifndef OPENSSL_NO_COMP |
efa7dd64 RS |
137 | COMP_CTX_free(s->expand); |
138 | s->expand = NULL; | |
0f113f3e MC |
139 | if (comp != NULL) { |
140 | s->expand = COMP_CTX_new(comp->method); | |
141 | if (s->expand == NULL) { | |
f63a17d6 MC |
142 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
143 | SSL_F_TLS1_CHANGE_CIPHER_STATE, | |
144 | SSL_R_COMPRESSION_LIBRARY_ERROR); | |
145 | goto err; | |
0f113f3e | 146 | } |
0f113f3e | 147 | } |
09b6c2ef | 148 | #endif |
0f113f3e | 149 | /* |
d5d0a1cb | 150 | * this is done by dtls1_reset_seq_numbers for DTLS |
0f113f3e | 151 | */ |
d5d0a1cb | 152 | if (!SSL_IS_DTLS(s)) |
de07f311 | 153 | RECORD_LAYER_reset_read_sequence(&s->rlayer); |
0f113f3e MC |
154 | mac_secret = &(s->s3->read_mac_secret[0]); |
155 | mac_secret_size = &(s->s3->read_mac_secret_size); | |
156 | } else { | |
7426cd34 | 157 | s->statem.enc_write_state = ENC_WRITE_STATE_INVALID; |
28a31a0a MC |
158 | if (s->ext.use_etm) |
159 | s->s3->flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE; | |
160 | else | |
161 | s->s3->flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE; | |
162 | ||
0f113f3e MC |
163 | if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC) |
164 | s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM; | |
165 | else | |
166 | s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM; | |
f63a17d6 | 167 | if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s)) { |
0f113f3e | 168 | reuse_dd = 1; |
f63a17d6 MC |
169 | } else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL) { |
170 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE, | |
171 | ERR_R_MALLOC_FAILURE); | |
0f113f3e | 172 | goto err; |
f63a17d6 | 173 | } |
0f113f3e MC |
174 | dd = s->enc_write_ctx; |
175 | if (SSL_IS_DTLS(s)) { | |
bfb0641f | 176 | mac_ctx = EVP_MD_CTX_new(); |
f63a17d6 MC |
177 | if (mac_ctx == NULL) { |
178 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
179 | SSL_F_TLS1_CHANGE_CIPHER_STATE, | |
180 | ERR_R_MALLOC_FAILURE); | |
0f113f3e | 181 | goto err; |
f63a17d6 | 182 | } |
0f113f3e | 183 | s->write_hash = mac_ctx; |
5f3d93e4 | 184 | } else { |
0f113f3e | 185 | mac_ctx = ssl_replace_hash(&s->write_hash, NULL); |
f63a17d6 MC |
186 | if (mac_ctx == NULL) { |
187 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
188 | SSL_F_TLS1_CHANGE_CIPHER_STATE, | |
189 | ERR_R_MALLOC_FAILURE); | |
5f3d93e4 | 190 | goto err; |
f63a17d6 | 191 | } |
5f3d93e4 | 192 | } |
09b6c2ef | 193 | #ifndef OPENSSL_NO_COMP |
efa7dd64 RS |
194 | COMP_CTX_free(s->compress); |
195 | s->compress = NULL; | |
0f113f3e MC |
196 | if (comp != NULL) { |
197 | s->compress = COMP_CTX_new(comp->method); | |
198 | if (s->compress == NULL) { | |
f63a17d6 MC |
199 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
200 | SSL_F_TLS1_CHANGE_CIPHER_STATE, | |
201 | SSL_R_COMPRESSION_LIBRARY_ERROR); | |
202 | goto err; | |
0f113f3e MC |
203 | } |
204 | } | |
09b6c2ef | 205 | #endif |
0f113f3e | 206 | /* |
d5d0a1cb | 207 | * this is done by dtls1_reset_seq_numbers for DTLS |
0f113f3e | 208 | */ |
d5d0a1cb | 209 | if (!SSL_IS_DTLS(s)) |
de07f311 | 210 | RECORD_LAYER_reset_write_sequence(&s->rlayer); |
0f113f3e MC |
211 | mac_secret = &(s->s3->write_mac_secret[0]); |
212 | mac_secret_size = &(s->s3->write_mac_secret_size); | |
213 | } | |
214 | ||
215 | if (reuse_dd) | |
846ec07d | 216 | EVP_CIPHER_CTX_reset(dd); |
0f113f3e MC |
217 | |
218 | p = s->s3->tmp.key_block; | |
219 | i = *mac_secret_size = s->s3->tmp.new_mac_secret_size; | |
220 | ||
b43d1cbb | 221 | /* TODO(size_t): convert me */ |
0f113f3e | 222 | cl = EVP_CIPHER_key_length(c); |
361a1191 | 223 | j = cl; |
0f113f3e | 224 | /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */ |
e75c5a79 | 225 | /* If GCM/CCM mode only part of IV comes from PRF */ |
0f113f3e MC |
226 | if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) |
227 | k = EVP_GCM_TLS_FIXED_IV_LEN; | |
e75c5a79 DSH |
228 | else if (EVP_CIPHER_mode(c) == EVP_CIPH_CCM_MODE) |
229 | k = EVP_CCM_TLS_FIXED_IV_LEN; | |
0f113f3e MC |
230 | else |
231 | k = EVP_CIPHER_iv_length(c); | |
232 | if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) || | |
233 | (which == SSL3_CHANGE_CIPHER_SERVER_READ)) { | |
234 | ms = &(p[0]); | |
235 | n = i + i; | |
236 | key = &(p[n]); | |
237 | n += j + j; | |
238 | iv = &(p[n]); | |
239 | n += k + k; | |
0f113f3e MC |
240 | } else { |
241 | n = i; | |
242 | ms = &(p[n]); | |
243 | n += i + j; | |
244 | key = &(p[n]); | |
245 | n += j + k; | |
246 | iv = &(p[n]); | |
247 | n += k; | |
0f113f3e MC |
248 | } |
249 | ||
250 | if (n > s->s3->tmp.key_block_length) { | |
f63a17d6 MC |
251 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE, |
252 | ERR_R_INTERNAL_ERROR); | |
253 | goto err; | |
0f113f3e MC |
254 | } |
255 | ||
256 | memcpy(mac_secret, ms, i); | |
257 | ||
258 | if (!(EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER)) { | |
348240c6 | 259 | /* TODO(size_t): Convert this function */ |
7b4d3ffa | 260 | mac_key = EVP_PKEY_new_mac_key(mac_type, NULL, mac_secret, |
f929439f | 261 | (int)*mac_secret_size); |
5f3d93e4 | 262 | if (mac_key == NULL |
a230b26e | 263 | || EVP_DigestSignInit(mac_ctx, NULL, m, NULL, mac_key) <= 0) { |
5f3d93e4 | 264 | EVP_PKEY_free(mac_key); |
f63a17d6 MC |
265 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE, |
266 | ERR_R_INTERNAL_ERROR); | |
267 | goto err; | |
5f3d93e4 | 268 | } |
0f113f3e MC |
269 | EVP_PKEY_free(mac_key); |
270 | } | |
d63a5e5e | 271 | #ifdef SSL_DEBUG |
0f113f3e MC |
272 | printf("which = %04X\nmac key=", which); |
273 | { | |
2b7363ec | 274 | size_t z; |
0f113f3e MC |
275 | for (z = 0; z < i; z++) |
276 | printf("%02X%c", ms[z], ((z + 1) % 16) ? ' ' : '\n'); | |
277 | } | |
58964a49 | 278 | #endif |
0f113f3e MC |
279 | |
280 | if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) { | |
eadf70d2 | 281 | if (!EVP_CipherInit_ex(dd, c, NULL, key, NULL, (which & SSL3_CC_WRITE)) |
348240c6 MC |
282 | || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, (int)k, |
283 | iv)) { | |
f63a17d6 MC |
284 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE, |
285 | ERR_R_INTERNAL_ERROR); | |
286 | goto err; | |
eadf70d2 | 287 | } |
e75c5a79 | 288 | } else if (EVP_CIPHER_mode(c) == EVP_CIPH_CCM_MODE) { |
3d3701ea | 289 | int taglen; |
a230b26e EK |
290 | if (s->s3->tmp. |
291 | new_cipher->algorithm_enc & (SSL_AES128CCM8 | SSL_AES256CCM8)) | |
ec07b1d8 | 292 | taglen = EVP_CCM8_TLS_TAG_LEN; |
3d3701ea | 293 | else |
ec07b1d8 | 294 | taglen = EVP_CCM_TLS_TAG_LEN; |
e75c5a79 DSH |
295 | if (!EVP_CipherInit_ex(dd, c, NULL, NULL, NULL, (which & SSL3_CC_WRITE)) |
296 | || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_IVLEN, 12, NULL) | |
297 | || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_TAG, taglen, NULL) | |
348240c6 | 298 | || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_CCM_SET_IV_FIXED, (int)k, iv) |
e75c5a79 | 299 | || !EVP_CipherInit_ex(dd, NULL, NULL, key, NULL, -1)) { |
f63a17d6 MC |
300 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE, |
301 | ERR_R_INTERNAL_ERROR); | |
302 | goto err; | |
e75c5a79 | 303 | } |
eadf70d2 MC |
304 | } else { |
305 | if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE))) { | |
f63a17d6 MC |
306 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE, |
307 | ERR_R_INTERNAL_ERROR); | |
308 | goto err; | |
eadf70d2 MC |
309 | } |
310 | } | |
0f113f3e | 311 | /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */ |
eadf70d2 MC |
312 | if ((EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size |
313 | && !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_MAC_KEY, | |
348240c6 | 314 | (int)*mac_secret_size, mac_secret)) { |
f63a17d6 MC |
315 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE, |
316 | ERR_R_INTERNAL_ERROR); | |
317 | goto err; | |
eadf70d2 | 318 | } |
7426cd34 | 319 | s->statem.enc_write_state = ENC_WRITE_STATE_VALID; |
1cf218bc | 320 | |
d63a5e5e | 321 | #ifdef SSL_DEBUG |
0f113f3e MC |
322 | printf("which = %04X\nkey=", which); |
323 | { | |
324 | int z; | |
325 | for (z = 0; z < EVP_CIPHER_key_length(c); z++) | |
326 | printf("%02X%c", key[z], ((z + 1) % 16) ? ' ' : '\n'); | |
327 | } | |
328 | printf("\niv="); | |
329 | { | |
2b7363ec | 330 | size_t z; |
0f113f3e MC |
331 | for (z = 0; z < k; z++) |
332 | printf("%02X%c", iv[z], ((z + 1) % 16) ? ' ' : '\n'); | |
333 | } | |
334 | printf("\n"); | |
58964a49 RE |
335 | #endif |
336 | ||
0f113f3e MC |
337 | OPENSSL_cleanse(tmp1, sizeof(tmp1)); |
338 | OPENSSL_cleanse(tmp2, sizeof(tmp1)); | |
339 | OPENSSL_cleanse(iv1, sizeof(iv1)); | |
340 | OPENSSL_cleanse(iv2, sizeof(iv2)); | |
208fb891 | 341 | return 1; |
0f113f3e | 342 | err: |
e0f9bf1d RS |
343 | OPENSSL_cleanse(tmp1, sizeof(tmp1)); |
344 | OPENSSL_cleanse(tmp2, sizeof(tmp1)); | |
345 | OPENSSL_cleanse(iv1, sizeof(iv1)); | |
346 | OPENSSL_cleanse(iv2, sizeof(iv2)); | |
26a7d938 | 347 | return 0; |
0f113f3e | 348 | } |
58964a49 | 349 | |
6b691a5c | 350 | int tls1_setup_key_block(SSL *s) |
0f113f3e | 351 | { |
b7d60e76 | 352 | unsigned char *p; |
0f113f3e MC |
353 | const EVP_CIPHER *c; |
354 | const EVP_MD *hash; | |
0f113f3e | 355 | SSL_COMP *comp; |
8c1a5343 MC |
356 | int mac_type = NID_undef; |
357 | size_t num, mac_secret_size = 0; | |
0f113f3e | 358 | int ret = 0; |
58964a49 | 359 | |
0f113f3e | 360 | if (s->s3->tmp.key_block_length != 0) |
208fb891 | 361 | return 1; |
0f113f3e | 362 | |
28a31a0a MC |
363 | if (!ssl_cipher_get_evp(s->session, &c, &hash, &mac_type, &mac_secret_size, |
364 | &comp, s->ext.use_etm)) { | |
f63a17d6 MC |
365 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_SETUP_KEY_BLOCK, |
366 | SSL_R_CIPHER_OR_HASH_UNAVAILABLE); | |
26a7d938 | 367 | return 0; |
0f113f3e MC |
368 | } |
369 | ||
370 | s->s3->tmp.new_sym_enc = c; | |
371 | s->s3->tmp.new_hash = hash; | |
372 | s->s3->tmp.new_mac_pkey_type = mac_type; | |
373 | s->s3->tmp.new_mac_secret_size = mac_secret_size; | |
a230b26e | 374 | num = EVP_CIPHER_key_length(c) + mac_secret_size + EVP_CIPHER_iv_length(c); |
0f113f3e MC |
375 | num *= 2; |
376 | ||
377 | ssl3_cleanup_key_block(s); | |
378 | ||
b7d60e76 | 379 | if ((p = OPENSSL_malloc(num)) == NULL) { |
f63a17d6 MC |
380 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_SETUP_KEY_BLOCK, |
381 | ERR_R_MALLOC_FAILURE); | |
0f113f3e MC |
382 | goto err; |
383 | } | |
384 | ||
385 | s->s3->tmp.key_block_length = num; | |
b7d60e76 | 386 | s->s3->tmp.key_block = p; |
0f113f3e | 387 | |
d63a5e5e | 388 | #ifdef SSL_DEBUG |
0f113f3e MC |
389 | printf("client random\n"); |
390 | { | |
391 | int z; | |
392 | for (z = 0; z < SSL3_RANDOM_SIZE; z++) | |
393 | printf("%02X%c", s->s3->client_random[z], | |
394 | ((z + 1) % 16) ? ' ' : '\n'); | |
395 | } | |
396 | printf("server random\n"); | |
397 | { | |
398 | int z; | |
399 | for (z = 0; z < SSL3_RANDOM_SIZE; z++) | |
400 | printf("%02X%c", s->s3->server_random[z], | |
401 | ((z + 1) % 16) ? ' ' : '\n'); | |
402 | } | |
403 | printf("master key\n"); | |
404 | { | |
8c1a5343 | 405 | size_t z; |
0f113f3e MC |
406 | for (z = 0; z < s->session->master_key_length; z++) |
407 | printf("%02X%c", s->session->master_key[z], | |
408 | ((z + 1) % 16) ? ' ' : '\n'); | |
409 | } | |
58964a49 | 410 | #endif |
d4d2f3a4 MC |
411 | if (!tls1_generate_key_block(s, p, num)) { |
412 | /* SSLfatal() already called */ | |
0f113f3e | 413 | goto err; |
d4d2f3a4 | 414 | } |
d63a5e5e | 415 | #ifdef SSL_DEBUG |
0f113f3e MC |
416 | printf("\nkey block\n"); |
417 | { | |
8c1a5343 | 418 | size_t z; |
0f113f3e | 419 | for (z = 0; z < num; z++) |
d1776fde | 420 | printf("%02X%c", p[z], ((z + 1) % 16) ? ' ' : '\n'); |
0f113f3e | 421 | } |
58964a49 RE |
422 | #endif |
423 | ||
0f113f3e MC |
424 | if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS) |
425 | && s->method->version <= TLS1_VERSION) { | |
426 | /* | |
427 | * enable vulnerability countermeasure for CBC ciphers with known-IV | |
428 | * problem (http://www.openssl.org/~bodo/tls-cbc.txt) | |
429 | */ | |
430 | s->s3->need_empty_fragments = 1; | |
431 | ||
432 | if (s->session->cipher != NULL) { | |
433 | if (s->session->cipher->algorithm_enc == SSL_eNULL) | |
434 | s->s3->need_empty_fragments = 0; | |
435 | ||
d1d0be3c | 436 | #ifndef OPENSSL_NO_RC4 |
0f113f3e MC |
437 | if (s->session->cipher->algorithm_enc == SSL_RC4) |
438 | s->s3->need_empty_fragments = 0; | |
82b0bf0b | 439 | #endif |
0f113f3e MC |
440 | } |
441 | } | |
442 | ||
443 | ret = 1; | |
444 | err: | |
26a7d938 | 445 | return ret; |
0f113f3e | 446 | } |
58964a49 | 447 | |
6db6bc5a MC |
448 | size_t tls1_final_finish_mac(SSL *s, const char *str, size_t slen, |
449 | unsigned char *out) | |
0f113f3e | 450 | { |
8c1a5343 | 451 | size_t hashlen; |
28ba2541 | 452 | unsigned char hash[EVP_MAX_MD_SIZE]; |
0f113f3e | 453 | |
d4d2f3a4 MC |
454 | if (!ssl3_digest_cached_records(s, 0)) { |
455 | /* SSLfatal() already called */ | |
124037fd | 456 | return 0; |
d4d2f3a4 | 457 | } |
0f113f3e | 458 | |
d4d2f3a4 MC |
459 | if (!ssl_handshake_hash(s, hash, sizeof(hash), &hashlen)) { |
460 | /* SSLfatal() already called */ | |
48fbcbac | 461 | return 0; |
d4d2f3a4 | 462 | } |
0f113f3e | 463 | |
b7d60e76 | 464 | if (!tls1_PRF(s, str, slen, hash, hashlen, NULL, 0, NULL, 0, NULL, 0, |
0f113f3e | 465 | s->session->master_key, s->session->master_key_length, |
d4d2f3a4 MC |
466 | out, TLS1_FINISH_MAC_LENGTH, 1)) { |
467 | /* SSLfatal() already called */ | |
0f113f3e | 468 | return 0; |
d4d2f3a4 | 469 | } |
c9dd49a7 | 470 | OPENSSL_cleanse(hash, hashlen); |
b7d60e76 | 471 | return TLS1_FINISH_MAC_LENGTH; |
0f113f3e | 472 | } |
58964a49 | 473 | |
6b691a5c | 474 | int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p, |
8c1a5343 | 475 | size_t len, size_t *secret_size) |
0f113f3e | 476 | { |
329114f9 | 477 | if (s->session->flags & SSL_SESS_FLAG_EXTMS) { |
0cfb0e75 | 478 | unsigned char hash[EVP_MAX_MD_SIZE * 2]; |
8c1a5343 | 479 | size_t hashlen; |
a230b26e EK |
480 | /* |
481 | * Digest cached records keeping record buffer (if present): this wont | |
482 | * affect client auth because we're freezing the buffer at the same | |
483 | * point (after client key exchange and before certificate verify) | |
124037fd | 484 | */ |
f63a17d6 MC |
485 | if (!ssl3_digest_cached_records(s, 1) |
486 | || !ssl_handshake_hash(s, hash, sizeof(hash), &hashlen)) { | |
487 | /* SSLfatal() already called */ | |
8c1a5343 | 488 | return 0; |
f63a17d6 | 489 | } |
0cfb0e75 DSH |
490 | #ifdef SSL_DEBUG |
491 | fprintf(stderr, "Handshake hashes:\n"); | |
492 | BIO_dump_fp(stderr, (char *)hash, hashlen); | |
493 | #endif | |
d4d2f3a4 MC |
494 | if (!tls1_PRF(s, |
495 | TLS_MD_EXTENDED_MASTER_SECRET_CONST, | |
496 | TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE, | |
497 | hash, hashlen, | |
498 | NULL, 0, | |
499 | NULL, 0, | |
500 | NULL, 0, p, len, out, | |
501 | SSL3_MASTER_SECRET_SIZE, 1)) { | |
502 | /* SSLfatal() already called */ | |
503 | return 0; | |
504 | } | |
0cfb0e75 DSH |
505 | OPENSSL_cleanse(hash, hashlen); |
506 | } else { | |
d4d2f3a4 MC |
507 | if (!tls1_PRF(s, |
508 | TLS_MD_MASTER_SECRET_CONST, | |
509 | TLS_MD_MASTER_SECRET_CONST_SIZE, | |
510 | s->s3->client_random, SSL3_RANDOM_SIZE, | |
511 | NULL, 0, | |
512 | s->s3->server_random, SSL3_RANDOM_SIZE, | |
513 | NULL, 0, p, len, out, | |
514 | SSL3_MASTER_SECRET_SIZE, 1)) { | |
515 | /* SSLfatal() already called */ | |
516 | return 0; | |
517 | } | |
0cfb0e75 | 518 | } |
a2f9200f | 519 | #ifdef SSL_DEBUG |
0f113f3e MC |
520 | fprintf(stderr, "Premaster Secret:\n"); |
521 | BIO_dump_fp(stderr, (char *)p, len); | |
522 | fprintf(stderr, "Client Random:\n"); | |
523 | BIO_dump_fp(stderr, (char *)s->s3->client_random, SSL3_RANDOM_SIZE); | |
524 | fprintf(stderr, "Server Random:\n"); | |
525 | BIO_dump_fp(stderr, (char *)s->s3->server_random, SSL3_RANDOM_SIZE); | |
526 | fprintf(stderr, "Master Secret:\n"); | |
527 | BIO_dump_fp(stderr, (char *)s->session->master_key, | |
528 | SSL3_MASTER_SECRET_SIZE); | |
a2f9200f | 529 | #endif |
761772d7 | 530 | |
8c1a5343 MC |
531 | *secret_size = SSL3_MASTER_SECRET_SIZE; |
532 | return 1; | |
0f113f3e | 533 | } |
58964a49 | 534 | |
74b4b494 | 535 | int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen, |
0f113f3e MC |
536 | const char *label, size_t llen, |
537 | const unsigned char *context, | |
538 | size_t contextlen, int use_context) | |
539 | { | |
0f113f3e | 540 | unsigned char *val = NULL; |
1c8a527c | 541 | size_t vallen = 0, currentvalpos; |
0f113f3e | 542 | int rv; |
e0af0405 | 543 | |
0f113f3e MC |
544 | /* |
545 | * construct PRF arguments we construct the PRF argument ourself rather | |
546 | * than passing separate values into the TLS PRF to ensure that the | |
547 | * concatenation of values does not create a prohibited label. | |
548 | */ | |
549 | vallen = llen + SSL3_RANDOM_SIZE * 2; | |
550 | if (use_context) { | |
551 | vallen += 2 + contextlen; | |
552 | } | |
553 | ||
554 | val = OPENSSL_malloc(vallen); | |
555 | if (val == NULL) | |
556 | goto err2; | |
557 | currentvalpos = 0; | |
558 | memcpy(val + currentvalpos, (unsigned char *)label, llen); | |
559 | currentvalpos += llen; | |
560 | memcpy(val + currentvalpos, s->s3->client_random, SSL3_RANDOM_SIZE); | |
561 | currentvalpos += SSL3_RANDOM_SIZE; | |
562 | memcpy(val + currentvalpos, s->s3->server_random, SSL3_RANDOM_SIZE); | |
563 | currentvalpos += SSL3_RANDOM_SIZE; | |
564 | ||
565 | if (use_context) { | |
566 | val[currentvalpos] = (contextlen >> 8) & 0xff; | |
567 | currentvalpos++; | |
568 | val[currentvalpos] = contextlen & 0xff; | |
569 | currentvalpos++; | |
570 | if ((contextlen > 0) || (context != NULL)) { | |
571 | memcpy(val + currentvalpos, context, contextlen); | |
572 | } | |
573 | } | |
574 | ||
575 | /* | |
576 | * disallow prohibited labels note that SSL3_RANDOM_SIZE > max(prohibited | |
577 | * label len) = 15, so size of val > max(prohibited label len) = 15 and | |
578 | * the comparisons won't have buffer overflow | |
579 | */ | |
580 | if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST, | |
581 | TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0) | |
582 | goto err1; | |
583 | if (memcmp(val, TLS_MD_SERVER_FINISH_CONST, | |
584 | TLS_MD_SERVER_FINISH_CONST_SIZE) == 0) | |
585 | goto err1; | |
586 | if (memcmp(val, TLS_MD_MASTER_SECRET_CONST, | |
587 | TLS_MD_MASTER_SECRET_CONST_SIZE) == 0) | |
588 | goto err1; | |
0cfb0e75 DSH |
589 | if (memcmp(val, TLS_MD_EXTENDED_MASTER_SECRET_CONST, |
590 | TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE) == 0) | |
591 | goto err1; | |
0f113f3e MC |
592 | if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST, |
593 | TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0) | |
594 | goto err1; | |
595 | ||
28ba2541 | 596 | rv = tls1_PRF(s, |
0f113f3e MC |
597 | val, vallen, |
598 | NULL, 0, | |
599 | NULL, 0, | |
600 | NULL, 0, | |
601 | NULL, 0, | |
602 | s->session->master_key, s->session->master_key_length, | |
d4d2f3a4 | 603 | out, olen, 0); |
e0af0405 | 604 | |
0f113f3e MC |
605 | goto ret; |
606 | err1: | |
a230b26e | 607 | SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL); |
0f113f3e MC |
608 | rv = 0; |
609 | goto ret; | |
610 | err2: | |
611 | SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE); | |
612 | rv = 0; | |
613 | ret: | |
05c7b163 | 614 | OPENSSL_clear_free(val, vallen); |
26a7d938 | 615 | return rv; |
0f113f3e | 616 | } |
e0af0405 | 617 | |
6b691a5c | 618 | int tls1_alert_code(int code) |
0f113f3e MC |
619 | { |
620 | switch (code) { | |
621 | case SSL_AD_CLOSE_NOTIFY: | |
26a7d938 | 622 | return SSL3_AD_CLOSE_NOTIFY; |
0f113f3e | 623 | case SSL_AD_UNEXPECTED_MESSAGE: |
26a7d938 | 624 | return SSL3_AD_UNEXPECTED_MESSAGE; |
0f113f3e | 625 | case SSL_AD_BAD_RECORD_MAC: |
26a7d938 | 626 | return SSL3_AD_BAD_RECORD_MAC; |
0f113f3e | 627 | case SSL_AD_DECRYPTION_FAILED: |
26a7d938 | 628 | return TLS1_AD_DECRYPTION_FAILED; |
0f113f3e | 629 | case SSL_AD_RECORD_OVERFLOW: |
26a7d938 | 630 | return TLS1_AD_RECORD_OVERFLOW; |
0f113f3e | 631 | case SSL_AD_DECOMPRESSION_FAILURE: |
26a7d938 | 632 | return SSL3_AD_DECOMPRESSION_FAILURE; |
0f113f3e | 633 | case SSL_AD_HANDSHAKE_FAILURE: |
26a7d938 | 634 | return SSL3_AD_HANDSHAKE_FAILURE; |
0f113f3e | 635 | case SSL_AD_NO_CERTIFICATE: |
26a7d938 | 636 | return -1; |
0f113f3e | 637 | case SSL_AD_BAD_CERTIFICATE: |
26a7d938 | 638 | return SSL3_AD_BAD_CERTIFICATE; |
0f113f3e | 639 | case SSL_AD_UNSUPPORTED_CERTIFICATE: |
26a7d938 | 640 | return SSL3_AD_UNSUPPORTED_CERTIFICATE; |
0f113f3e | 641 | case SSL_AD_CERTIFICATE_REVOKED: |
26a7d938 | 642 | return SSL3_AD_CERTIFICATE_REVOKED; |
0f113f3e | 643 | case SSL_AD_CERTIFICATE_EXPIRED: |
26a7d938 | 644 | return SSL3_AD_CERTIFICATE_EXPIRED; |
0f113f3e | 645 | case SSL_AD_CERTIFICATE_UNKNOWN: |
26a7d938 | 646 | return SSL3_AD_CERTIFICATE_UNKNOWN; |
0f113f3e | 647 | case SSL_AD_ILLEGAL_PARAMETER: |
26a7d938 | 648 | return SSL3_AD_ILLEGAL_PARAMETER; |
0f113f3e | 649 | case SSL_AD_UNKNOWN_CA: |
26a7d938 | 650 | return TLS1_AD_UNKNOWN_CA; |
0f113f3e | 651 | case SSL_AD_ACCESS_DENIED: |
26a7d938 | 652 | return TLS1_AD_ACCESS_DENIED; |
0f113f3e | 653 | case SSL_AD_DECODE_ERROR: |
26a7d938 | 654 | return TLS1_AD_DECODE_ERROR; |
0f113f3e | 655 | case SSL_AD_DECRYPT_ERROR: |
26a7d938 | 656 | return TLS1_AD_DECRYPT_ERROR; |
0f113f3e | 657 | case SSL_AD_EXPORT_RESTRICTION: |
26a7d938 | 658 | return TLS1_AD_EXPORT_RESTRICTION; |
0f113f3e | 659 | case SSL_AD_PROTOCOL_VERSION: |
26a7d938 | 660 | return TLS1_AD_PROTOCOL_VERSION; |
0f113f3e | 661 | case SSL_AD_INSUFFICIENT_SECURITY: |
26a7d938 | 662 | return TLS1_AD_INSUFFICIENT_SECURITY; |
0f113f3e | 663 | case SSL_AD_INTERNAL_ERROR: |
26a7d938 | 664 | return TLS1_AD_INTERNAL_ERROR; |
0f113f3e | 665 | case SSL_AD_USER_CANCELLED: |
26a7d938 | 666 | return TLS1_AD_USER_CANCELLED; |
0f113f3e | 667 | case SSL_AD_NO_RENEGOTIATION: |
26a7d938 | 668 | return TLS1_AD_NO_RENEGOTIATION; |
0f113f3e | 669 | case SSL_AD_UNSUPPORTED_EXTENSION: |
26a7d938 | 670 | return TLS1_AD_UNSUPPORTED_EXTENSION; |
0f113f3e | 671 | case SSL_AD_CERTIFICATE_UNOBTAINABLE: |
26a7d938 | 672 | return TLS1_AD_CERTIFICATE_UNOBTAINABLE; |
0f113f3e | 673 | case SSL_AD_UNRECOGNIZED_NAME: |
26a7d938 | 674 | return TLS1_AD_UNRECOGNIZED_NAME; |
0f113f3e | 675 | case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: |
26a7d938 | 676 | return TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE; |
0f113f3e | 677 | case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: |
26a7d938 | 678 | return TLS1_AD_BAD_CERTIFICATE_HASH_VALUE; |
0f113f3e | 679 | case SSL_AD_UNKNOWN_PSK_IDENTITY: |
26a7d938 | 680 | return TLS1_AD_UNKNOWN_PSK_IDENTITY; |
0f113f3e | 681 | case SSL_AD_INAPPROPRIATE_FALLBACK: |
26a7d938 | 682 | return TLS1_AD_INAPPROPRIATE_FALLBACK; |
06217867 | 683 | case SSL_AD_NO_APPLICATION_PROTOCOL: |
26a7d938 | 684 | return TLS1_AD_NO_APPLICATION_PROTOCOL; |
42c28b63 MC |
685 | case SSL_AD_CERTIFICATE_REQUIRED: |
686 | return SSL_AD_HANDSHAKE_FAILURE; | |
0f113f3e | 687 | default: |
26a7d938 | 688 | return -1; |
0f113f3e MC |
689 | } |
690 | } |