2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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
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.]
58 /* ====================================================================
59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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 * ====================================================================
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).
111 /* ====================================================================
112 * Copyright 2005 Nokia. All rights reserved.
114 * The portions of the attached software ("Contribution") is developed by
115 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
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.
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.
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.
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
139 #include "ssl_locl.h"
140 #ifndef OPENSSL_NO_COMP
141 # include <openssl/comp.h>
143 #include <openssl/evp.h>
144 #include <openssl/hmac.h>
145 #include <openssl/md5.h>
146 #include <openssl/rand.h>
148 /* seed1 through seed5 are virtually concatenated */
149 static int tls1_P_hash(const EVP_MD *md, const unsigned char *sec,
151 const void *seed1, int seed1_len,
152 const void *seed2, int seed2_len,
153 const void *seed3, int seed3_len,
154 const void *seed4, int seed4_len,
155 const void *seed5, int seed5_len,
156 unsigned char *out, int olen)
160 EVP_MD_CTX ctx, ctx_tmp, ctx_init;
162 unsigned char A1[EVP_MAX_MD_SIZE];
166 chunk = EVP_MD_size(md);
167 OPENSSL_assert(chunk >= 0);
169 EVP_MD_CTX_init(&ctx);
170 EVP_MD_CTX_init(&ctx_tmp);
171 EVP_MD_CTX_init(&ctx_init);
172 EVP_MD_CTX_set_flags(&ctx_init, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
173 mac_key = EVP_PKEY_new_mac_key(EVP_PKEY_HMAC, NULL, sec, sec_len);
176 if (!EVP_DigestSignInit(&ctx_init, NULL, md, NULL, mac_key))
178 if (!EVP_MD_CTX_copy_ex(&ctx, &ctx_init))
180 if (seed1 && !EVP_DigestSignUpdate(&ctx, seed1, seed1_len))
182 if (seed2 && !EVP_DigestSignUpdate(&ctx, seed2, seed2_len))
184 if (seed3 && !EVP_DigestSignUpdate(&ctx, seed3, seed3_len))
186 if (seed4 && !EVP_DigestSignUpdate(&ctx, seed4, seed4_len))
188 if (seed5 && !EVP_DigestSignUpdate(&ctx, seed5, seed5_len))
190 if (!EVP_DigestSignFinal(&ctx, A1, &A1_len))
194 /* Reinit mac contexts */
195 if (!EVP_MD_CTX_copy_ex(&ctx, &ctx_init))
197 if (!EVP_DigestSignUpdate(&ctx, A1, A1_len))
199 if (olen > chunk && !EVP_MD_CTX_copy_ex(&ctx_tmp, &ctx))
201 if (seed1 && !EVP_DigestSignUpdate(&ctx, seed1, seed1_len))
203 if (seed2 && !EVP_DigestSignUpdate(&ctx, seed2, seed2_len))
205 if (seed3 && !EVP_DigestSignUpdate(&ctx, seed3, seed3_len))
207 if (seed4 && !EVP_DigestSignUpdate(&ctx, seed4, seed4_len))
209 if (seed5 && !EVP_DigestSignUpdate(&ctx, seed5, seed5_len))
213 if (!EVP_DigestSignFinal(&ctx, out, &j))
217 /* calc the next A1 value */
218 if (!EVP_DigestSignFinal(&ctx_tmp, A1, &A1_len))
220 } else { /* last one */
222 if (!EVP_DigestSignFinal(&ctx, A1, &A1_len))
224 memcpy(out, A1, olen);
230 EVP_PKEY_free(mac_key);
231 EVP_MD_CTX_cleanup(&ctx);
232 EVP_MD_CTX_cleanup(&ctx_tmp);
233 EVP_MD_CTX_cleanup(&ctx_init);
234 OPENSSL_cleanse(A1, sizeof(A1));
238 /* seed1 through seed5 are virtually concatenated */
239 static int tls1_PRF(long digest_mask,
240 const void *seed1, int seed1_len,
241 const void *seed2, int seed2_len,
242 const void *seed3, int seed3_len,
243 const void *seed4, int seed4_len,
244 const void *seed5, int seed5_len,
245 const unsigned char *sec, int slen,
246 unsigned char *out1, unsigned char *out2, int olen)
248 int len, i, idx, count;
249 const unsigned char *S1;
254 /* Count number of digests and partition sec evenly */
256 for (idx = 0; ssl_get_handshake_digest(idx, &m, &md); idx++) {
257 if ((m << TLS1_PRF_DGST_SHIFT) & digest_mask)
261 /* Should never happen */
262 SSLerr(SSL_F_TLS1_PRF, ERR_R_INTERNAL_ERROR);
269 memset(out1, 0, olen);
270 for (idx = 0; ssl_get_handshake_digest(idx, &m, &md); idx++) {
271 if ((m << TLS1_PRF_DGST_SHIFT) & digest_mask) {
273 SSLerr(SSL_F_TLS1_PRF, SSL_R_UNSUPPORTED_DIGEST_TYPE);
276 if (!tls1_P_hash(md, S1, len + (slen & 1),
277 seed1, seed1_len, seed2, seed2_len, seed3,
278 seed3_len, seed4, seed4_len, seed5, seed5_len,
282 for (i = 0; i < olen; i++) {
292 static int tls1_generate_key_block(SSL *s, unsigned char *km,
293 unsigned char *tmp, int num)
296 ret = tls1_PRF(ssl_get_algorithm2(s),
297 TLS_MD_KEY_EXPANSION_CONST,
298 TLS_MD_KEY_EXPANSION_CONST_SIZE, s->s3->server_random,
299 SSL3_RANDOM_SIZE, s->s3->client_random, SSL3_RANDOM_SIZE,
300 NULL, 0, NULL, 0, s->session->master_key,
301 s->session->master_key_length, km, tmp, num);
306 int tls1_change_cipher_state(SSL *s, int which)
308 static const unsigned char empty[] = "";
309 unsigned char *p, *mac_secret;
310 unsigned char *exp_label;
311 unsigned char tmp1[EVP_MAX_KEY_LENGTH];
312 unsigned char tmp2[EVP_MAX_KEY_LENGTH];
313 unsigned char iv1[EVP_MAX_IV_LENGTH * 2];
314 unsigned char iv2[EVP_MAX_IV_LENGTH * 2];
315 unsigned char *ms, *key, *iv;
319 #ifndef OPENSSL_NO_COMP
320 const SSL_COMP *comp;
324 int *mac_secret_size;
327 int is_export, n, i, j, k, exp_label_len, cl;
330 is_export = SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
331 c = s->s3->tmp.new_sym_enc;
332 m = s->s3->tmp.new_hash;
333 mac_type = s->s3->tmp.new_mac_pkey_type;
334 #ifndef OPENSSL_NO_COMP
335 comp = s->s3->tmp.new_compression;
338 if (which & SSL3_CC_READ) {
339 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
340 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
342 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
344 if (s->enc_read_ctx != NULL)
346 else if ((s->enc_read_ctx =
347 OPENSSL_malloc(sizeof(*s->enc_read_ctx))) == NULL)
351 * make sure it's intialized in case we exit later with an error
353 EVP_CIPHER_CTX_init(s->enc_read_ctx);
354 dd = s->enc_read_ctx;
355 mac_ctx = ssl_replace_hash(&s->read_hash, NULL);
356 #ifndef OPENSSL_NO_COMP
357 COMP_CTX_free(s->expand);
360 s->expand = COMP_CTX_new(comp->method);
361 if (s->expand == NULL) {
362 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,
363 SSL_R_COMPRESSION_LIBRARY_ERROR);
366 if (!RECORD_LAYER_setup_comp_buffer(&s->rlayer))
371 * this is done by dtls1_reset_seq_numbers for DTLS
374 RECORD_LAYER_reset_read_sequence(&s->rlayer);
375 mac_secret = &(s->s3->read_mac_secret[0]);
376 mac_secret_size = &(s->s3->read_mac_secret_size);
378 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
379 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
381 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
382 if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s))
384 else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL)
386 dd = s->enc_write_ctx;
387 if (SSL_IS_DTLS(s)) {
388 mac_ctx = EVP_MD_CTX_create();
391 s->write_hash = mac_ctx;
393 mac_ctx = ssl_replace_hash(&s->write_hash, NULL);
394 #ifndef OPENSSL_NO_COMP
395 COMP_CTX_free(s->compress);
398 s->compress = COMP_CTX_new(comp->method);
399 if (s->compress == NULL) {
400 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,
401 SSL_R_COMPRESSION_LIBRARY_ERROR);
407 * this is done by dtls1_reset_seq_numbers for DTLS
410 RECORD_LAYER_reset_write_sequence(&s->rlayer);
411 mac_secret = &(s->s3->write_mac_secret[0]);
412 mac_secret_size = &(s->s3->write_mac_secret_size);
416 EVP_CIPHER_CTX_cleanup(dd);
418 p = s->s3->tmp.key_block;
419 i = *mac_secret_size = s->s3->tmp.new_mac_secret_size;
421 cl = EVP_CIPHER_key_length(c);
422 j = is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
423 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
424 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
425 /* If GCM mode only part of IV comes from PRF */
426 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
427 k = EVP_GCM_TLS_FIXED_IV_LEN;
429 k = EVP_CIPHER_iv_length(c);
430 if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
431 (which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
438 exp_label = (unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
439 exp_label_len = TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
449 exp_label = (unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
450 exp_label_len = TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
454 if (n > s->s3->tmp.key_block_length) {
455 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
459 memcpy(mac_secret, ms, i);
461 if (!(EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER)) {
462 mac_key = EVP_PKEY_new_mac_key(mac_type, NULL,
463 mac_secret, *mac_secret_size);
464 EVP_DigestSignInit(mac_ctx, NULL, m, NULL, mac_key);
465 EVP_PKEY_free(mac_key);
468 printf("which = %04X\nmac key=", which);
471 for (z = 0; z < i; z++)
472 printf("%02X%c", ms[z], ((z + 1) % 16) ? ' ' : '\n');
477 * In here I set both the read and write key/iv to the same value
478 * since only the correct one will be used :-).
480 if (!tls1_PRF(ssl_get_algorithm2(s),
481 exp_label, exp_label_len,
482 s->s3->client_random, SSL3_RANDOM_SIZE,
483 s->s3->server_random, SSL3_RANDOM_SIZE,
485 key, j, tmp1, tmp2, EVP_CIPHER_key_length(c)))
490 if (!tls1_PRF(ssl_get_algorithm2(s),
491 TLS_MD_IV_BLOCK_CONST, TLS_MD_IV_BLOCK_CONST_SIZE,
492 s->s3->client_random, SSL3_RANDOM_SIZE,
493 s->s3->server_random, SSL3_RANDOM_SIZE,
494 NULL, 0, NULL, 0, empty, 0, iv1, iv2, k * 2))
503 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) {
504 if (!EVP_CipherInit_ex(dd, c, NULL, key, NULL, (which & SSL3_CC_WRITE))
505 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, k, iv)) {
506 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
510 if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE))) {
511 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
515 /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
516 if ((EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size
517 && !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_MAC_KEY,
518 *mac_secret_size, mac_secret)) {
519 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
522 #ifdef OPENSSL_SSL_TRACE_CRYPTO
523 if (s->msg_callback) {
524 int wh = which & SSL3_CC_WRITE ? TLS1_RT_CRYPTO_WRITE : 0;
525 if (*mac_secret_size)
526 s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_MAC,
527 mac_secret, *mac_secret_size,
528 s, s->msg_callback_arg);
530 s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_KEY,
531 key, c->key_len, s, s->msg_callback_arg);
533 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
534 wh |= TLS1_RT_CRYPTO_FIXED_IV;
536 wh |= TLS1_RT_CRYPTO_IV;
537 s->msg_callback(2, s->version, wh, iv, k, s, s->msg_callback_arg);
543 printf("which = %04X\nkey=", which);
546 for (z = 0; z < EVP_CIPHER_key_length(c); z++)
547 printf("%02X%c", key[z], ((z + 1) % 16) ? ' ' : '\n');
552 for (z = 0; z < k; z++)
553 printf("%02X%c", iv[z], ((z + 1) % 16) ? ' ' : '\n');
558 OPENSSL_cleanse(tmp1, sizeof(tmp1));
559 OPENSSL_cleanse(tmp2, sizeof(tmp1));
560 OPENSSL_cleanse(iv1, sizeof(iv1));
561 OPENSSL_cleanse(iv2, sizeof(iv2));
564 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_MALLOC_FAILURE);
566 OPENSSL_cleanse(tmp1, sizeof(tmp1));
567 OPENSSL_cleanse(tmp2, sizeof(tmp1));
568 OPENSSL_cleanse(iv1, sizeof(iv1));
569 OPENSSL_cleanse(iv2, sizeof(iv2));
573 int tls1_setup_key_block(SSL *s)
575 unsigned char *p1, *p2 = NULL;
580 int mac_type = NID_undef, mac_secret_size = 0;
583 if (s->s3->tmp.key_block_length != 0)
586 if (!ssl_cipher_get_evp
587 (s->session, &c, &hash, &mac_type, &mac_secret_size, &comp,
589 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK, SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
593 s->s3->tmp.new_sym_enc = c;
594 s->s3->tmp.new_hash = hash;
595 s->s3->tmp.new_mac_pkey_type = mac_type;
596 s->s3->tmp.new_mac_secret_size = mac_secret_size;
598 EVP_CIPHER_key_length(c) + mac_secret_size + EVP_CIPHER_iv_length(c);
601 ssl3_cleanup_key_block(s);
603 if ((p1 = OPENSSL_malloc(num)) == NULL) {
604 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK, ERR_R_MALLOC_FAILURE);
608 s->s3->tmp.key_block_length = num;
609 s->s3->tmp.key_block = p1;
611 if ((p2 = OPENSSL_malloc(num)) == NULL) {
612 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK, ERR_R_MALLOC_FAILURE);
617 printf("client random\n");
620 for (z = 0; z < SSL3_RANDOM_SIZE; z++)
621 printf("%02X%c", s->s3->client_random[z],
622 ((z + 1) % 16) ? ' ' : '\n');
624 printf("server random\n");
627 for (z = 0; z < SSL3_RANDOM_SIZE; z++)
628 printf("%02X%c", s->s3->server_random[z],
629 ((z + 1) % 16) ? ' ' : '\n');
631 printf("master key\n");
634 for (z = 0; z < s->session->master_key_length; z++)
635 printf("%02X%c", s->session->master_key[z],
636 ((z + 1) % 16) ? ' ' : '\n');
639 if (!tls1_generate_key_block(s, p1, p2, num))
642 printf("\nkey block\n");
645 for (z = 0; z < num; z++)
646 printf("%02X%c", p1[z], ((z + 1) % 16) ? ' ' : '\n');
650 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)
651 && s->method->version <= TLS1_VERSION) {
653 * enable vulnerability countermeasure for CBC ciphers with known-IV
654 * problem (http://www.openssl.org/~bodo/tls-cbc.txt)
656 s->s3->need_empty_fragments = 1;
658 if (s->session->cipher != NULL) {
659 if (s->session->cipher->algorithm_enc == SSL_eNULL)
660 s->s3->need_empty_fragments = 0;
662 #ifndef OPENSSL_NO_RC4
663 if (s->session->cipher->algorithm_enc == SSL_RC4)
664 s->s3->need_empty_fragments = 0;
671 OPENSSL_clear_free(p2, num);
676 int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out)
679 EVP_MD_CTX ctx, *d = NULL;
682 if (s->s3->handshake_buffer)
683 if (!ssl3_digest_cached_records(s))
686 for (i = 0; i < SSL_MAX_DIGEST; i++) {
687 if (s->s3->handshake_dgst[i]
688 && EVP_MD_CTX_type(s->s3->handshake_dgst[i]) == md_nid) {
689 d = s->s3->handshake_dgst[i];
694 SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC, SSL_R_NO_REQUIRED_DIGEST);
698 EVP_MD_CTX_init(&ctx);
699 EVP_MD_CTX_copy_ex(&ctx, d);
700 EVP_DigestFinal_ex(&ctx, out, &ret);
701 EVP_MD_CTX_cleanup(&ctx);
705 int tls1_final_finish_mac(SSL *s, const char *str, int slen,
709 unsigned char hash[2 * EVP_MAX_MD_SIZE];
710 unsigned char buf2[12];
712 if (s->s3->handshake_buffer)
713 if (!ssl3_digest_cached_records(s))
716 hashlen = ssl_handshake_hash(s, hash, sizeof(hash));
721 if (!tls1_PRF(ssl_get_algorithm2(s),
722 str, slen, hash, hashlen, NULL, 0, NULL, 0, NULL, 0,
723 s->session->master_key, s->session->master_key_length,
724 out, buf2, sizeof buf2))
726 OPENSSL_cleanse(hash, hashlen);
727 OPENSSL_cleanse(buf2, sizeof(buf2));
731 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
734 unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
736 if (s->session->flags & SSL_SESS_FLAG_EXTMS) {
737 unsigned char hash[EVP_MAX_MD_SIZE * 2];
739 /* If we don't have any digests cache records */
740 if (s->s3->handshake_buffer) {
742 * keep record buffer: this wont affect client auth because we're
743 * freezing the buffer at the same point (after client key
744 * exchange and before certificate verify)
746 s->s3->flags |= TLS1_FLAGS_KEEP_HANDSHAKE;
747 if (!ssl3_digest_cached_records(s))
750 hashlen = ssl_handshake_hash(s, hash, sizeof(hash));
752 fprintf(stderr, "Handshake hashes:\n");
753 BIO_dump_fp(stderr, (char *)hash, hashlen);
755 tls1_PRF(ssl_get_algorithm2(s),
756 TLS_MD_EXTENDED_MASTER_SECRET_CONST,
757 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE,
761 NULL, 0, p, len, s->session->master_key, buff, sizeof buff);
762 OPENSSL_cleanse(hash, hashlen);
764 tls1_PRF(ssl_get_algorithm2(s),
765 TLS_MD_MASTER_SECRET_CONST,
766 TLS_MD_MASTER_SECRET_CONST_SIZE,
767 s->s3->client_random, SSL3_RANDOM_SIZE,
769 s->s3->server_random, SSL3_RANDOM_SIZE,
770 NULL, 0, p, len, s->session->master_key, buff, sizeof buff);
772 OPENSSL_cleanse(buff, sizeof buff);
774 fprintf(stderr, "Premaster Secret:\n");
775 BIO_dump_fp(stderr, (char *)p, len);
776 fprintf(stderr, "Client Random:\n");
777 BIO_dump_fp(stderr, (char *)s->s3->client_random, SSL3_RANDOM_SIZE);
778 fprintf(stderr, "Server Random:\n");
779 BIO_dump_fp(stderr, (char *)s->s3->server_random, SSL3_RANDOM_SIZE);
780 fprintf(stderr, "Master Secret:\n");
781 BIO_dump_fp(stderr, (char *)s->session->master_key,
782 SSL3_MASTER_SECRET_SIZE);
785 #ifdef OPENSSL_SSL_TRACE_CRYPTO
786 if (s->msg_callback) {
787 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_PREMASTER,
788 p, len, s, s->msg_callback_arg);
789 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_CLIENT_RANDOM,
790 s->s3->client_random, SSL3_RANDOM_SIZE,
791 s, s->msg_callback_arg);
792 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_SERVER_RANDOM,
793 s->s3->server_random, SSL3_RANDOM_SIZE,
794 s, s->msg_callback_arg);
795 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_MASTER,
796 s->session->master_key,
797 SSL3_MASTER_SECRET_SIZE, s, s->msg_callback_arg);
801 return (SSL3_MASTER_SECRET_SIZE);
804 int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
805 const char *label, size_t llen,
806 const unsigned char *context,
807 size_t contextlen, int use_context)
810 unsigned char *val = NULL;
811 size_t vallen = 0, currentvalpos;
814 buff = OPENSSL_malloc(olen);
819 * construct PRF arguments we construct the PRF argument ourself rather
820 * than passing separate values into the TLS PRF to ensure that the
821 * concatenation of values does not create a prohibited label.
823 vallen = llen + SSL3_RANDOM_SIZE * 2;
825 vallen += 2 + contextlen;
828 val = OPENSSL_malloc(vallen);
832 memcpy(val + currentvalpos, (unsigned char *)label, llen);
833 currentvalpos += llen;
834 memcpy(val + currentvalpos, s->s3->client_random, SSL3_RANDOM_SIZE);
835 currentvalpos += SSL3_RANDOM_SIZE;
836 memcpy(val + currentvalpos, s->s3->server_random, SSL3_RANDOM_SIZE);
837 currentvalpos += SSL3_RANDOM_SIZE;
840 val[currentvalpos] = (contextlen >> 8) & 0xff;
842 val[currentvalpos] = contextlen & 0xff;
844 if ((contextlen > 0) || (context != NULL)) {
845 memcpy(val + currentvalpos, context, contextlen);
850 * disallow prohibited labels note that SSL3_RANDOM_SIZE > max(prohibited
851 * label len) = 15, so size of val > max(prohibited label len) = 15 and
852 * the comparisons won't have buffer overflow
854 if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST,
855 TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0)
857 if (memcmp(val, TLS_MD_SERVER_FINISH_CONST,
858 TLS_MD_SERVER_FINISH_CONST_SIZE) == 0)
860 if (memcmp(val, TLS_MD_MASTER_SECRET_CONST,
861 TLS_MD_MASTER_SECRET_CONST_SIZE) == 0)
863 if (memcmp(val, TLS_MD_EXTENDED_MASTER_SECRET_CONST,
864 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE) == 0)
866 if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST,
867 TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0)
870 rv = tls1_PRF(ssl_get_algorithm2(s),
876 s->session->master_key, s->session->master_key_length,
881 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL,
882 SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
886 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE);
889 CRYPTO_clear_free(val, vallen);
890 CRYPTO_clear_free(buff, olen);
894 int tls1_alert_code(int code)
897 case SSL_AD_CLOSE_NOTIFY:
898 return (SSL3_AD_CLOSE_NOTIFY);
899 case SSL_AD_UNEXPECTED_MESSAGE:
900 return (SSL3_AD_UNEXPECTED_MESSAGE);
901 case SSL_AD_BAD_RECORD_MAC:
902 return (SSL3_AD_BAD_RECORD_MAC);
903 case SSL_AD_DECRYPTION_FAILED:
904 return (TLS1_AD_DECRYPTION_FAILED);
905 case SSL_AD_RECORD_OVERFLOW:
906 return (TLS1_AD_RECORD_OVERFLOW);
907 case SSL_AD_DECOMPRESSION_FAILURE:
908 return (SSL3_AD_DECOMPRESSION_FAILURE);
909 case SSL_AD_HANDSHAKE_FAILURE:
910 return (SSL3_AD_HANDSHAKE_FAILURE);
911 case SSL_AD_NO_CERTIFICATE:
913 case SSL_AD_BAD_CERTIFICATE:
914 return (SSL3_AD_BAD_CERTIFICATE);
915 case SSL_AD_UNSUPPORTED_CERTIFICATE:
916 return (SSL3_AD_UNSUPPORTED_CERTIFICATE);
917 case SSL_AD_CERTIFICATE_REVOKED:
918 return (SSL3_AD_CERTIFICATE_REVOKED);
919 case SSL_AD_CERTIFICATE_EXPIRED:
920 return (SSL3_AD_CERTIFICATE_EXPIRED);
921 case SSL_AD_CERTIFICATE_UNKNOWN:
922 return (SSL3_AD_CERTIFICATE_UNKNOWN);
923 case SSL_AD_ILLEGAL_PARAMETER:
924 return (SSL3_AD_ILLEGAL_PARAMETER);
925 case SSL_AD_UNKNOWN_CA:
926 return (TLS1_AD_UNKNOWN_CA);
927 case SSL_AD_ACCESS_DENIED:
928 return (TLS1_AD_ACCESS_DENIED);
929 case SSL_AD_DECODE_ERROR:
930 return (TLS1_AD_DECODE_ERROR);
931 case SSL_AD_DECRYPT_ERROR:
932 return (TLS1_AD_DECRYPT_ERROR);
933 case SSL_AD_EXPORT_RESTRICTION:
934 return (TLS1_AD_EXPORT_RESTRICTION);
935 case SSL_AD_PROTOCOL_VERSION:
936 return (TLS1_AD_PROTOCOL_VERSION);
937 case SSL_AD_INSUFFICIENT_SECURITY:
938 return (TLS1_AD_INSUFFICIENT_SECURITY);
939 case SSL_AD_INTERNAL_ERROR:
940 return (TLS1_AD_INTERNAL_ERROR);
941 case SSL_AD_USER_CANCELLED:
942 return (TLS1_AD_USER_CANCELLED);
943 case SSL_AD_NO_RENEGOTIATION:
944 return (TLS1_AD_NO_RENEGOTIATION);
945 case SSL_AD_UNSUPPORTED_EXTENSION:
946 return (TLS1_AD_UNSUPPORTED_EXTENSION);
947 case SSL_AD_CERTIFICATE_UNOBTAINABLE:
948 return (TLS1_AD_CERTIFICATE_UNOBTAINABLE);
949 case SSL_AD_UNRECOGNIZED_NAME:
950 return (TLS1_AD_UNRECOGNIZED_NAME);
951 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
952 return (TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
953 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
954 return (TLS1_AD_BAD_CERTIFICATE_HASH_VALUE);
955 case SSL_AD_UNKNOWN_PSK_IDENTITY:
956 return (TLS1_AD_UNKNOWN_PSK_IDENTITY);
957 case SSL_AD_INAPPROPRIATE_FALLBACK:
958 return (TLS1_AD_INAPPROPRIATE_FALLBACK);