source: EcnlProtoTool/trunk/openssl-1.1.0e/ssl/t1_enc.c@ 331

Last change on this file since 331 was 331, checked in by coas-nagasima, 6 years ago

prototoolに関連するプロジェクトをnewlibからmuslを使うよう変更・更新
ntshellをnewlibの下位の実装から、muslのsyscallの実装に変更・更新
以下のOSSをアップデート
・mruby-1.3.0
・musl-1.1.18
・onigmo-6.1.3
・tcc-0.9.27
以下のOSSを追加
・openssl-1.1.0e
・curl-7.57.0
・zlib-1.2.11
以下のmrbgemsを追加
・iij/mruby-digest
・iij/mruby-env
・iij/mruby-errno
・iij/mruby-iijson
・iij/mruby-ipaddr
・iij/mruby-mock
・iij/mruby-require
・iij/mruby-tls-openssl
  • Property svn:eol-style set to native
  • Property svn:mime-type set to text/x-csrc
File size: 23.2 KB
Line 
1/*
2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10/* ====================================================================
11 * Copyright 2005 Nokia. All rights reserved.
12 *
13 * The portions of the attached software ("Contribution") is developed by
14 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
15 * license.
16 *
17 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
18 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
19 * support (see RFC 4279) to OpenSSL.
20 *
21 * No patent licenses or other rights except those expressly stated in
22 * the OpenSSL open source license shall be deemed granted or received
23 * expressly, by implication, estoppel, or otherwise.
24 *
25 * No assurances are provided by Nokia that the Contribution does not
26 * infringe the patent or other intellectual property rights of any third
27 * party or that the license provides you with all the necessary rights
28 * to make use of the Contribution.
29 *
30 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
31 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
32 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
33 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
34 * OTHERWISE.
35 */
36
37#include <stdio.h>
38#include "ssl_locl.h"
39#include <openssl/comp.h>
40#include <openssl/evp.h>
41#include <openssl/kdf.h>
42#include <openssl/rand.h>
43
44/* seed1 through seed5 are concatenated */
45static int tls1_PRF(SSL *s,
46 const void *seed1, int seed1_len,
47 const void *seed2, int seed2_len,
48 const void *seed3, int seed3_len,
49 const void *seed4, int seed4_len,
50 const void *seed5, int seed5_len,
51 const unsigned char *sec, int slen,
52 unsigned char *out, int olen)
53{
54 const EVP_MD *md = ssl_prf_md(s);
55 EVP_PKEY_CTX *pctx = NULL;
56
57 int ret = 0;
58 size_t outlen = olen;
59
60 if (md == NULL) {
61 /* Should never happen */
62 SSLerr(SSL_F_TLS1_PRF, ERR_R_INTERNAL_ERROR);
63 return 0;
64 }
65 pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_TLS1_PRF, NULL);
66 if (pctx == NULL || EVP_PKEY_derive_init(pctx) <= 0
67 || EVP_PKEY_CTX_set_tls1_prf_md(pctx, md) <= 0
68 || EVP_PKEY_CTX_set1_tls1_prf_secret(pctx, sec, slen) <= 0)
69 goto err;
70
71 if (EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed1, seed1_len) <= 0)
72 goto err;
73 if (EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed2, seed2_len) <= 0)
74 goto err;
75 if (EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed3, seed3_len) <= 0)
76 goto err;
77 if (EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed4, seed4_len) <= 0)
78 goto err;
79 if (EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed5, seed5_len) <= 0)
80 goto err;
81
82 if (EVP_PKEY_derive(pctx, out, &outlen) <= 0)
83 goto err;
84 ret = 1;
85
86 err:
87 EVP_PKEY_CTX_free(pctx);
88 return ret;
89}
90
91static int tls1_generate_key_block(SSL *s, unsigned char *km, int num)
92{
93 int ret;
94 ret = tls1_PRF(s,
95 TLS_MD_KEY_EXPANSION_CONST,
96 TLS_MD_KEY_EXPANSION_CONST_SIZE, s->s3->server_random,
97 SSL3_RANDOM_SIZE, s->s3->client_random, SSL3_RANDOM_SIZE,
98 NULL, 0, NULL, 0, s->session->master_key,
99 s->session->master_key_length, km, num);
100
101 return ret;
102}
103
104int tls1_change_cipher_state(SSL *s, int which)
105{
106 unsigned char *p, *mac_secret;
107 unsigned char tmp1[EVP_MAX_KEY_LENGTH];
108 unsigned char tmp2[EVP_MAX_KEY_LENGTH];
109 unsigned char iv1[EVP_MAX_IV_LENGTH * 2];
110 unsigned char iv2[EVP_MAX_IV_LENGTH * 2];
111 unsigned char *ms, *key, *iv;
112 EVP_CIPHER_CTX *dd;
113 const EVP_CIPHER *c;
114#ifndef OPENSSL_NO_COMP
115 const SSL_COMP *comp;
116#endif
117 const EVP_MD *m;
118 int mac_type;
119 int *mac_secret_size;
120 EVP_MD_CTX *mac_ctx;
121 EVP_PKEY *mac_key;
122 int n, i, j, k, cl;
123 int reuse_dd = 0;
124
125 c = s->s3->tmp.new_sym_enc;
126 m = s->s3->tmp.new_hash;
127 mac_type = s->s3->tmp.new_mac_pkey_type;
128#ifndef OPENSSL_NO_COMP
129 comp = s->s3->tmp.new_compression;
130#endif
131
132 if (which & SSL3_CC_READ) {
133 if (s->tlsext_use_etm)
134 s->s3->flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
135 else
136 s->s3->flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
137
138 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
139 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
140 else
141 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
142
143 if (s->enc_read_ctx != NULL)
144 reuse_dd = 1;
145 else if ((s->enc_read_ctx = EVP_CIPHER_CTX_new()) == NULL)
146 goto err;
147 else
148 /*
149 * make sure it's initialised in case we exit later with an error
150 */
151 EVP_CIPHER_CTX_reset(s->enc_read_ctx);
152 dd = s->enc_read_ctx;
153 mac_ctx = ssl_replace_hash(&s->read_hash, NULL);
154 if (mac_ctx == NULL)
155 goto err;
156#ifndef OPENSSL_NO_COMP
157 COMP_CTX_free(s->expand);
158 s->expand = NULL;
159 if (comp != NULL) {
160 s->expand = COMP_CTX_new(comp->method);
161 if (s->expand == NULL) {
162 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,
163 SSL_R_COMPRESSION_LIBRARY_ERROR);
164 goto err2;
165 }
166 }
167#endif
168 /*
169 * this is done by dtls1_reset_seq_numbers for DTLS
170 */
171 if (!SSL_IS_DTLS(s))
172 RECORD_LAYER_reset_read_sequence(&s->rlayer);
173 mac_secret = &(s->s3->read_mac_secret[0]);
174 mac_secret_size = &(s->s3->read_mac_secret_size);
175 } else {
176 if (s->tlsext_use_etm)
177 s->s3->flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
178 else
179 s->s3->flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
180
181 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
182 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
183 else
184 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
185 if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s))
186 reuse_dd = 1;
187 else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL)
188 goto err;
189 dd = s->enc_write_ctx;
190 if (SSL_IS_DTLS(s)) {
191 mac_ctx = EVP_MD_CTX_new();
192 if (mac_ctx == NULL)
193 goto err;
194 s->write_hash = mac_ctx;
195 } else {
196 mac_ctx = ssl_replace_hash(&s->write_hash, NULL);
197 if (mac_ctx == NULL)
198 goto err;
199 }
200#ifndef OPENSSL_NO_COMP
201 COMP_CTX_free(s->compress);
202 s->compress = NULL;
203 if (comp != NULL) {
204 s->compress = COMP_CTX_new(comp->method);
205 if (s->compress == NULL) {
206 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,
207 SSL_R_COMPRESSION_LIBRARY_ERROR);
208 goto err2;
209 }
210 }
211#endif
212 /*
213 * this is done by dtls1_reset_seq_numbers for DTLS
214 */
215 if (!SSL_IS_DTLS(s))
216 RECORD_LAYER_reset_write_sequence(&s->rlayer);
217 mac_secret = &(s->s3->write_mac_secret[0]);
218 mac_secret_size = &(s->s3->write_mac_secret_size);
219 }
220
221 if (reuse_dd)
222 EVP_CIPHER_CTX_reset(dd);
223
224 p = s->s3->tmp.key_block;
225 i = *mac_secret_size = s->s3->tmp.new_mac_secret_size;
226
227 cl = EVP_CIPHER_key_length(c);
228 j = cl;
229 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
230 /* If GCM/CCM mode only part of IV comes from PRF */
231 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
232 k = EVP_GCM_TLS_FIXED_IV_LEN;
233 else if (EVP_CIPHER_mode(c) == EVP_CIPH_CCM_MODE)
234 k = EVP_CCM_TLS_FIXED_IV_LEN;
235 else
236 k = EVP_CIPHER_iv_length(c);
237 if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
238 (which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
239 ms = &(p[0]);
240 n = i + i;
241 key = &(p[n]);
242 n += j + j;
243 iv = &(p[n]);
244 n += k + k;
245 } else {
246 n = i;
247 ms = &(p[n]);
248 n += i + j;
249 key = &(p[n]);
250 n += j + k;
251 iv = &(p[n]);
252 n += k;
253 }
254
255 if (n > s->s3->tmp.key_block_length) {
256 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
257 goto err2;
258 }
259
260 memcpy(mac_secret, ms, i);
261
262 if (!(EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER)) {
263 mac_key = EVP_PKEY_new_mac_key(mac_type, NULL,
264 mac_secret, *mac_secret_size);
265 if (mac_key == NULL
266 || EVP_DigestSignInit(mac_ctx, NULL, m, NULL, mac_key) <= 0) {
267 EVP_PKEY_free(mac_key);
268 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
269 goto err2;
270 }
271 EVP_PKEY_free(mac_key);
272 }
273#ifdef SSL_DEBUG
274 printf("which = %04X\nmac key=", which);
275 {
276 int z;
277 for (z = 0; z < i; z++)
278 printf("%02X%c", ms[z], ((z + 1) % 16) ? ' ' : '\n');
279 }
280#endif
281
282 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) {
283 if (!EVP_CipherInit_ex(dd, c, NULL, key, NULL, (which & SSL3_CC_WRITE))
284 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, k, iv)) {
285 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
286 goto err2;
287 }
288 } else if (EVP_CIPHER_mode(c) == EVP_CIPH_CCM_MODE) {
289 int taglen;
290 if (s->s3->tmp.
291 new_cipher->algorithm_enc & (SSL_AES128CCM8 | SSL_AES256CCM8))
292 taglen = 8;
293 else
294 taglen = 16;
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)
298 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_CCM_SET_IV_FIXED, k, iv)
299 || !EVP_CipherInit_ex(dd, NULL, NULL, key, NULL, -1)) {
300 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
301 goto err2;
302 }
303 } else {
304 if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE))) {
305 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
306 goto err2;
307 }
308 }
309 /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
310 if ((EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size
311 && !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_MAC_KEY,
312 *mac_secret_size, mac_secret)) {
313 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
314 goto err2;
315 }
316#ifdef OPENSSL_SSL_TRACE_CRYPTO
317 if (s->msg_callback) {
318 int wh = which & SSL3_CC_WRITE ? TLS1_RT_CRYPTO_WRITE : 0;
319 if (*mac_secret_size)
320 s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_MAC,
321 mac_secret, *mac_secret_size,
322 s, s->msg_callback_arg);
323 if (c->key_len)
324 s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_KEY,
325 key, c->key_len, s, s->msg_callback_arg);
326 if (k) {
327 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
328 wh |= TLS1_RT_CRYPTO_FIXED_IV;
329 else
330 wh |= TLS1_RT_CRYPTO_IV;
331 s->msg_callback(2, s->version, wh, iv, k, s, s->msg_callback_arg);
332 }
333 }
334#endif
335
336#ifdef SSL_DEBUG
337 printf("which = %04X\nkey=", which);
338 {
339 int z;
340 for (z = 0; z < EVP_CIPHER_key_length(c); z++)
341 printf("%02X%c", key[z], ((z + 1) % 16) ? ' ' : '\n');
342 }
343 printf("\niv=");
344 {
345 int z;
346 for (z = 0; z < k; z++)
347 printf("%02X%c", iv[z], ((z + 1) % 16) ? ' ' : '\n');
348 }
349 printf("\n");
350#endif
351
352 OPENSSL_cleanse(tmp1, sizeof(tmp1));
353 OPENSSL_cleanse(tmp2, sizeof(tmp1));
354 OPENSSL_cleanse(iv1, sizeof(iv1));
355 OPENSSL_cleanse(iv2, sizeof(iv2));
356 return (1);
357 err:
358 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_MALLOC_FAILURE);
359 err2:
360 OPENSSL_cleanse(tmp1, sizeof(tmp1));
361 OPENSSL_cleanse(tmp2, sizeof(tmp1));
362 OPENSSL_cleanse(iv1, sizeof(iv1));
363 OPENSSL_cleanse(iv2, sizeof(iv2));
364 return (0);
365}
366
367int tls1_setup_key_block(SSL *s)
368{
369 unsigned char *p;
370 const EVP_CIPHER *c;
371 const EVP_MD *hash;
372 int num;
373 SSL_COMP *comp;
374 int mac_type = NID_undef, mac_secret_size = 0;
375 int ret = 0;
376
377 if (s->s3->tmp.key_block_length != 0)
378 return (1);
379
380 if (!ssl_cipher_get_evp(s->session, &c, &hash, &mac_type, &mac_secret_size,
381 &comp, s->tlsext_use_etm)) {
382 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK, SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
383 return (0);
384 }
385
386 s->s3->tmp.new_sym_enc = c;
387 s->s3->tmp.new_hash = hash;
388 s->s3->tmp.new_mac_pkey_type = mac_type;
389 s->s3->tmp.new_mac_secret_size = mac_secret_size;
390 num = EVP_CIPHER_key_length(c) + mac_secret_size + EVP_CIPHER_iv_length(c);
391 num *= 2;
392
393 ssl3_cleanup_key_block(s);
394
395 if ((p = OPENSSL_malloc(num)) == NULL) {
396 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK, ERR_R_MALLOC_FAILURE);
397 goto err;
398 }
399
400 s->s3->tmp.key_block_length = num;
401 s->s3->tmp.key_block = p;
402
403#ifdef SSL_DEBUG
404 printf("client random\n");
405 {
406 int z;
407 for (z = 0; z < SSL3_RANDOM_SIZE; z++)
408 printf("%02X%c", s->s3->client_random[z],
409 ((z + 1) % 16) ? ' ' : '\n');
410 }
411 printf("server random\n");
412 {
413 int z;
414 for (z = 0; z < SSL3_RANDOM_SIZE; z++)
415 printf("%02X%c", s->s3->server_random[z],
416 ((z + 1) % 16) ? ' ' : '\n');
417 }
418 printf("master key\n");
419 {
420 int z;
421 for (z = 0; z < s->session->master_key_length; z++)
422 printf("%02X%c", s->session->master_key[z],
423 ((z + 1) % 16) ? ' ' : '\n');
424 }
425#endif
426 if (!tls1_generate_key_block(s, p, num))
427 goto err;
428#ifdef SSL_DEBUG
429 printf("\nkey block\n");
430 {
431 int z;
432 for (z = 0; z < num; z++)
433 printf("%02X%c", p[z], ((z + 1) % 16) ? ' ' : '\n');
434 }
435#endif
436
437 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)
438 && s->method->version <= TLS1_VERSION) {
439 /*
440 * enable vulnerability countermeasure for CBC ciphers with known-IV
441 * problem (http://www.openssl.org/~bodo/tls-cbc.txt)
442 */
443 s->s3->need_empty_fragments = 1;
444
445 if (s->session->cipher != NULL) {
446 if (s->session->cipher->algorithm_enc == SSL_eNULL)
447 s->s3->need_empty_fragments = 0;
448
449#ifndef OPENSSL_NO_RC4
450 if (s->session->cipher->algorithm_enc == SSL_RC4)
451 s->s3->need_empty_fragments = 0;
452#endif
453 }
454 }
455
456 ret = 1;
457 err:
458 return (ret);
459}
460
461int tls1_final_finish_mac(SSL *s, const char *str, int slen, unsigned char *out)
462{
463 int hashlen;
464 unsigned char hash[EVP_MAX_MD_SIZE];
465
466 if (!ssl3_digest_cached_records(s, 0))
467 return 0;
468
469 hashlen = ssl_handshake_hash(s, hash, sizeof(hash));
470
471 if (hashlen == 0)
472 return 0;
473
474 if (!tls1_PRF(s, str, slen, hash, hashlen, NULL, 0, NULL, 0, NULL, 0,
475 s->session->master_key, s->session->master_key_length,
476 out, TLS1_FINISH_MAC_LENGTH))
477 return 0;
478 OPENSSL_cleanse(hash, hashlen);
479 return TLS1_FINISH_MAC_LENGTH;
480}
481
482int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
483 int len)
484{
485 if (s->session->flags & SSL_SESS_FLAG_EXTMS) {
486 unsigned char hash[EVP_MAX_MD_SIZE * 2];
487 int hashlen;
488 /*
489 * Digest cached records keeping record buffer (if present): this wont
490 * affect client auth because we're freezing the buffer at the same
491 * point (after client key exchange and before certificate verify)
492 */
493 if (!ssl3_digest_cached_records(s, 1))
494 return -1;
495 hashlen = ssl_handshake_hash(s, hash, sizeof(hash));
496#ifdef SSL_DEBUG
497 fprintf(stderr, "Handshake hashes:\n");
498 BIO_dump_fp(stderr, (char *)hash, hashlen);
499#endif
500 tls1_PRF(s,
501 TLS_MD_EXTENDED_MASTER_SECRET_CONST,
502 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE,
503 hash, hashlen,
504 NULL, 0,
505 NULL, 0,
506 NULL, 0, p, len, s->session->master_key,
507 SSL3_MASTER_SECRET_SIZE);
508 OPENSSL_cleanse(hash, hashlen);
509 } else {
510 tls1_PRF(s,
511 TLS_MD_MASTER_SECRET_CONST,
512 TLS_MD_MASTER_SECRET_CONST_SIZE,
513 s->s3->client_random, SSL3_RANDOM_SIZE,
514 NULL, 0,
515 s->s3->server_random, SSL3_RANDOM_SIZE,
516 NULL, 0, p, len, s->session->master_key,
517 SSL3_MASTER_SECRET_SIZE);
518 }
519#ifdef SSL_DEBUG
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);
529#endif
530
531#ifdef OPENSSL_SSL_TRACE_CRYPTO
532 if (s->msg_callback) {
533 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_PREMASTER,
534 p, len, s, s->msg_callback_arg);
535 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_CLIENT_RANDOM,
536 s->s3->client_random, SSL3_RANDOM_SIZE,
537 s, s->msg_callback_arg);
538 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_SERVER_RANDOM,
539 s->s3->server_random, SSL3_RANDOM_SIZE,
540 s, s->msg_callback_arg);
541 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_MASTER,
542 s->session->master_key,
543 SSL3_MASTER_SECRET_SIZE, s, s->msg_callback_arg);
544 }
545#endif
546
547 return (SSL3_MASTER_SECRET_SIZE);
548}
549
550int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
551 const char *label, size_t llen,
552 const unsigned char *context,
553 size_t contextlen, int use_context)
554{
555 unsigned char *val = NULL;
556 size_t vallen = 0, currentvalpos;
557 int rv;
558
559 /*
560 * construct PRF arguments we construct the PRF argument ourself rather
561 * than passing separate values into the TLS PRF to ensure that the
562 * concatenation of values does not create a prohibited label.
563 */
564 vallen = llen + SSL3_RANDOM_SIZE * 2;
565 if (use_context) {
566 vallen += 2 + contextlen;
567 }
568
569 val = OPENSSL_malloc(vallen);
570 if (val == NULL)
571 goto err2;
572 currentvalpos = 0;
573 memcpy(val + currentvalpos, (unsigned char *)label, llen);
574 currentvalpos += llen;
575 memcpy(val + currentvalpos, s->s3->client_random, SSL3_RANDOM_SIZE);
576 currentvalpos += SSL3_RANDOM_SIZE;
577 memcpy(val + currentvalpos, s->s3->server_random, SSL3_RANDOM_SIZE);
578 currentvalpos += SSL3_RANDOM_SIZE;
579
580 if (use_context) {
581 val[currentvalpos] = (contextlen >> 8) & 0xff;
582 currentvalpos++;
583 val[currentvalpos] = contextlen & 0xff;
584 currentvalpos++;
585 if ((contextlen > 0) || (context != NULL)) {
586 memcpy(val + currentvalpos, context, contextlen);
587 }
588 }
589
590 /*
591 * disallow prohibited labels note that SSL3_RANDOM_SIZE > max(prohibited
592 * label len) = 15, so size of val > max(prohibited label len) = 15 and
593 * the comparisons won't have buffer overflow
594 */
595 if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST,
596 TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0)
597 goto err1;
598 if (memcmp(val, TLS_MD_SERVER_FINISH_CONST,
599 TLS_MD_SERVER_FINISH_CONST_SIZE) == 0)
600 goto err1;
601 if (memcmp(val, TLS_MD_MASTER_SECRET_CONST,
602 TLS_MD_MASTER_SECRET_CONST_SIZE) == 0)
603 goto err1;
604 if (memcmp(val, TLS_MD_EXTENDED_MASTER_SECRET_CONST,
605 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE) == 0)
606 goto err1;
607 if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST,
608 TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0)
609 goto err1;
610
611 rv = tls1_PRF(s,
612 val, vallen,
613 NULL, 0,
614 NULL, 0,
615 NULL, 0,
616 NULL, 0,
617 s->session->master_key, s->session->master_key_length,
618 out, olen);
619
620 goto ret;
621 err1:
622 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
623 rv = 0;
624 goto ret;
625 err2:
626 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE);
627 rv = 0;
628 ret:
629 OPENSSL_clear_free(val, vallen);
630 return (rv);
631}
632
633int tls1_alert_code(int code)
634{
635 switch (code) {
636 case SSL_AD_CLOSE_NOTIFY:
637 return (SSL3_AD_CLOSE_NOTIFY);
638 case SSL_AD_UNEXPECTED_MESSAGE:
639 return (SSL3_AD_UNEXPECTED_MESSAGE);
640 case SSL_AD_BAD_RECORD_MAC:
641 return (SSL3_AD_BAD_RECORD_MAC);
642 case SSL_AD_DECRYPTION_FAILED:
643 return (TLS1_AD_DECRYPTION_FAILED);
644 case SSL_AD_RECORD_OVERFLOW:
645 return (TLS1_AD_RECORD_OVERFLOW);
646 case SSL_AD_DECOMPRESSION_FAILURE:
647 return (SSL3_AD_DECOMPRESSION_FAILURE);
648 case SSL_AD_HANDSHAKE_FAILURE:
649 return (SSL3_AD_HANDSHAKE_FAILURE);
650 case SSL_AD_NO_CERTIFICATE:
651 return (-1);
652 case SSL_AD_BAD_CERTIFICATE:
653 return (SSL3_AD_BAD_CERTIFICATE);
654 case SSL_AD_UNSUPPORTED_CERTIFICATE:
655 return (SSL3_AD_UNSUPPORTED_CERTIFICATE);
656 case SSL_AD_CERTIFICATE_REVOKED:
657 return (SSL3_AD_CERTIFICATE_REVOKED);
658 case SSL_AD_CERTIFICATE_EXPIRED:
659 return (SSL3_AD_CERTIFICATE_EXPIRED);
660 case SSL_AD_CERTIFICATE_UNKNOWN:
661 return (SSL3_AD_CERTIFICATE_UNKNOWN);
662 case SSL_AD_ILLEGAL_PARAMETER:
663 return (SSL3_AD_ILLEGAL_PARAMETER);
664 case SSL_AD_UNKNOWN_CA:
665 return (TLS1_AD_UNKNOWN_CA);
666 case SSL_AD_ACCESS_DENIED:
667 return (TLS1_AD_ACCESS_DENIED);
668 case SSL_AD_DECODE_ERROR:
669 return (TLS1_AD_DECODE_ERROR);
670 case SSL_AD_DECRYPT_ERROR:
671 return (TLS1_AD_DECRYPT_ERROR);
672 case SSL_AD_EXPORT_RESTRICTION:
673 return (TLS1_AD_EXPORT_RESTRICTION);
674 case SSL_AD_PROTOCOL_VERSION:
675 return (TLS1_AD_PROTOCOL_VERSION);
676 case SSL_AD_INSUFFICIENT_SECURITY:
677 return (TLS1_AD_INSUFFICIENT_SECURITY);
678 case SSL_AD_INTERNAL_ERROR:
679 return (TLS1_AD_INTERNAL_ERROR);
680 case SSL_AD_USER_CANCELLED:
681 return (TLS1_AD_USER_CANCELLED);
682 case SSL_AD_NO_RENEGOTIATION:
683 return (TLS1_AD_NO_RENEGOTIATION);
684 case SSL_AD_UNSUPPORTED_EXTENSION:
685 return (TLS1_AD_UNSUPPORTED_EXTENSION);
686 case SSL_AD_CERTIFICATE_UNOBTAINABLE:
687 return (TLS1_AD_CERTIFICATE_UNOBTAINABLE);
688 case SSL_AD_UNRECOGNIZED_NAME:
689 return (TLS1_AD_UNRECOGNIZED_NAME);
690 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
691 return (TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
692 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
693 return (TLS1_AD_BAD_CERTIFICATE_HASH_VALUE);
694 case SSL_AD_UNKNOWN_PSK_IDENTITY:
695 return (TLS1_AD_UNKNOWN_PSK_IDENTITY);
696 case SSL_AD_INAPPROPRIATE_FALLBACK:
697 return (TLS1_AD_INAPPROPRIATE_FALLBACK);
698 case SSL_AD_NO_APPLICATION_PROTOCOL:
699 return (TLS1_AD_NO_APPLICATION_PROTOCOL);
700 default:
701 return (-1);
702 }
703}
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