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 # include <openssl/des.h>
151 /* seed1 through seed5 are virtually concatenated */
152 static int tls1_P_hash(const EVP_MD *md, const unsigned char *sec,
154 const void *seed1, int seed1_len,
155 const void *seed2, int seed2_len,
156 const void *seed3, int seed3_len,
157 const void *seed4, int seed4_len,
158 const void *seed5, int seed5_len,
159 unsigned char *out, int olen)
163 EVP_MD_CTX ctx, ctx_tmp;
165 unsigned char A1[EVP_MAX_MD_SIZE];
169 chunk = EVP_MD_size(md);
170 OPENSSL_assert(chunk >= 0);
172 EVP_MD_CTX_init(&ctx);
173 EVP_MD_CTX_init(&ctx_tmp);
174 EVP_MD_CTX_set_flags(&ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
175 EVP_MD_CTX_set_flags(&ctx_tmp, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
176 mac_key = EVP_PKEY_new_mac_key(EVP_PKEY_HMAC, NULL, sec, sec_len);
179 if (!EVP_DigestSignInit(&ctx, NULL, md, NULL, mac_key))
181 if (!EVP_DigestSignInit(&ctx_tmp, NULL, md, NULL, mac_key))
183 if (seed1 && !EVP_DigestSignUpdate(&ctx, seed1, seed1_len))
185 if (seed2 && !EVP_DigestSignUpdate(&ctx, seed2, seed2_len))
187 if (seed3 && !EVP_DigestSignUpdate(&ctx, seed3, seed3_len))
189 if (seed4 && !EVP_DigestSignUpdate(&ctx, seed4, seed4_len))
191 if (seed5 && !EVP_DigestSignUpdate(&ctx, seed5, seed5_len))
193 if (!EVP_DigestSignFinal(&ctx, A1, &A1_len))
197 /* Reinit mac contexts */
198 if (!EVP_DigestSignInit(&ctx, NULL, md, NULL, mac_key))
200 if (!EVP_DigestSignInit(&ctx_tmp, NULL, md, NULL, mac_key))
202 if (!EVP_DigestSignUpdate(&ctx, A1, A1_len))
204 if (!EVP_DigestSignUpdate(&ctx_tmp, A1, A1_len))
206 if (seed1 && !EVP_DigestSignUpdate(&ctx, seed1, seed1_len))
208 if (seed2 && !EVP_DigestSignUpdate(&ctx, seed2, seed2_len))
210 if (seed3 && !EVP_DigestSignUpdate(&ctx, seed3, seed3_len))
212 if (seed4 && !EVP_DigestSignUpdate(&ctx, seed4, seed4_len))
214 if (seed5 && !EVP_DigestSignUpdate(&ctx, seed5, seed5_len))
218 if (!EVP_DigestSignFinal(&ctx, out, &j))
222 /* calc the next A1 value */
223 if (!EVP_DigestSignFinal(&ctx_tmp, A1, &A1_len))
225 } else { /* last one */
227 if (!EVP_DigestSignFinal(&ctx, A1, &A1_len))
229 memcpy(out, A1, olen);
235 EVP_PKEY_free(mac_key);
236 EVP_MD_CTX_cleanup(&ctx);
237 EVP_MD_CTX_cleanup(&ctx_tmp);
238 OPENSSL_cleanse(A1, sizeof(A1));
242 /* seed1 through seed5 are virtually concatenated */
243 static int tls1_PRF(long digest_mask,
244 const void *seed1, int seed1_len,
245 const void *seed2, int seed2_len,
246 const void *seed3, int seed3_len,
247 const void *seed4, int seed4_len,
248 const void *seed5, int seed5_len,
249 const unsigned char *sec, int slen,
250 unsigned char *out1, unsigned char *out2, int olen)
252 int len, i, idx, count;
253 const unsigned char *S1;
258 /* Count number of digests and partition sec evenly */
260 for (idx = 0; ssl_get_handshake_digest(idx, &m, &md); idx++) {
261 if ((m << TLS1_PRF_DGST_SHIFT) & digest_mask)
268 memset(out1, 0, olen);
269 for (idx = 0; ssl_get_handshake_digest(idx, &m, &md); idx++) {
270 if ((m << TLS1_PRF_DGST_SHIFT) & digest_mask) {
272 SSLerr(SSL_F_TLS1_PRF, SSL_R_UNSUPPORTED_DIGEST_TYPE);
275 if (!tls1_P_hash(md, S1, len + (slen & 1),
276 seed1, seed1_len, seed2, seed2_len, seed3,
277 seed3_len, seed4, seed4_len, seed5, seed5_len,
281 for (i = 0; i < olen; i++) {
291 static int tls1_generate_key_block(SSL *s, unsigned char *km,
292 unsigned char *tmp, int num)
295 ret = tls1_PRF(ssl_get_algorithm2(s),
296 TLS_MD_KEY_EXPANSION_CONST,
297 TLS_MD_KEY_EXPANSION_CONST_SIZE, s->s3->server_random,
298 SSL3_RANDOM_SIZE, s->s3->client_random, SSL3_RANDOM_SIZE,
299 NULL, 0, NULL, 0, s->session->master_key,
300 s->session->master_key_length, km, tmp, num);
302 fprintf(stderr, "tls1_generate_key_block() ==> %d byte master_key =\n\t",
303 s->session->master_key_length);
306 for (i = 0; i < s->session->master_key_length; i++) {
307 fprintf(stderr, "%02X", s->session->master_key[i]);
309 fprintf(stderr, "\n");
311 #endif /* KSSL_DEBUG */
315 int tls1_change_cipher_state(SSL *s, int which)
317 static const unsigned char empty[] = "";
318 unsigned char *p, *mac_secret;
319 unsigned char *exp_label;
320 unsigned char tmp1[EVP_MAX_KEY_LENGTH];
321 unsigned char tmp2[EVP_MAX_KEY_LENGTH];
322 unsigned char iv1[EVP_MAX_IV_LENGTH * 2];
323 unsigned char iv2[EVP_MAX_IV_LENGTH * 2];
324 unsigned char *ms, *key, *iv;
328 #ifndef OPENSSL_NO_COMP
329 const SSL_COMP *comp;
333 int *mac_secret_size;
336 int is_export, n, i, j, k, exp_label_len, cl;
339 is_export = SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
340 c = s->s3->tmp.new_sym_enc;
341 m = s->s3->tmp.new_hash;
342 mac_type = s->s3->tmp.new_mac_pkey_type;
343 #ifndef OPENSSL_NO_COMP
344 comp = s->s3->tmp.new_compression;
348 fprintf(stderr, "tls1_change_cipher_state(which= %d) w/\n", which);
349 fprintf(stderr, "\talg= %ld/%ld, comp= %p\n",
350 s->s3->tmp.new_cipher->algorithm_mkey,
351 s->s3->tmp.new_cipher->algorithm_auth, comp);
352 fprintf(stderr, "\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c);
353 fprintf(stderr, "\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
354 c->nid, c->block_size, c->key_len, c->iv_len);
355 fprintf(stderr, "\tkey_block: len= %d, data= ",
356 s->s3->tmp.key_block_length);
359 for (i = 0; i < s->s3->tmp.key_block_length; i++)
360 fprintf(stderr, "%02x", s->s3->tmp.key_block[i]);
361 fprintf(stderr, "\n");
363 #endif /* KSSL_DEBUG */
365 if (which & SSL3_CC_READ) {
366 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
367 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
369 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
371 if (s->enc_read_ctx != NULL)
373 else if ((s->enc_read_ctx =
374 OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
378 * make sure it's intialized in case we exit later with an error
380 EVP_CIPHER_CTX_init(s->enc_read_ctx);
381 dd = s->enc_read_ctx;
382 mac_ctx = ssl_replace_hash(&s->read_hash, NULL);
383 #ifndef OPENSSL_NO_COMP
384 if (s->expand != NULL) {
385 COMP_CTX_free(s->expand);
389 s->expand = COMP_CTX_new(comp->method);
390 if (s->expand == NULL) {
391 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,
392 SSL_R_COMPRESSION_LIBRARY_ERROR);
395 if (s->s3->rrec.comp == NULL)
396 s->s3->rrec.comp = (unsigned char *)
397 OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
398 if (s->s3->rrec.comp == NULL)
403 * this is done by dtls1_reset_seq_numbers for DTLS1_VERSION
405 if (s->version != DTLS1_VERSION)
406 memset(&(s->s3->read_sequence[0]), 0, 8);
407 mac_secret = &(s->s3->read_mac_secret[0]);
408 mac_secret_size = &(s->s3->read_mac_secret_size);
410 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
411 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
413 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
414 if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s))
416 else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL)
418 dd = s->enc_write_ctx;
419 if (SSL_IS_DTLS(s)) {
420 mac_ctx = EVP_MD_CTX_create();
423 s->write_hash = mac_ctx;
425 mac_ctx = ssl_replace_hash(&s->write_hash, NULL);
426 #ifndef OPENSSL_NO_COMP
427 if (s->compress != NULL) {
428 COMP_CTX_free(s->compress);
432 s->compress = COMP_CTX_new(comp->method);
433 if (s->compress == NULL) {
434 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,
435 SSL_R_COMPRESSION_LIBRARY_ERROR);
441 * this is done by dtls1_reset_seq_numbers for DTLS1_VERSION
443 if (s->version != DTLS1_VERSION)
444 memset(&(s->s3->write_sequence[0]), 0, 8);
445 mac_secret = &(s->s3->write_mac_secret[0]);
446 mac_secret_size = &(s->s3->write_mac_secret_size);
450 EVP_CIPHER_CTX_cleanup(dd);
452 p = s->s3->tmp.key_block;
453 i = *mac_secret_size = s->s3->tmp.new_mac_secret_size;
455 cl = EVP_CIPHER_key_length(c);
456 j = is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
457 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
458 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
459 /* If GCM mode only part of IV comes from PRF */
460 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
461 k = EVP_GCM_TLS_FIXED_IV_LEN;
463 k = EVP_CIPHER_iv_length(c);
464 if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
465 (which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
472 exp_label = (unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
473 exp_label_len = TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
483 exp_label = (unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
484 exp_label_len = TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
488 if (n > s->s3->tmp.key_block_length) {
489 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
493 memcpy(mac_secret, ms, i);
495 if (!(EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER)) {
496 mac_key = EVP_PKEY_new_mac_key(mac_type, NULL,
497 mac_secret, *mac_secret_size);
498 EVP_DigestSignInit(mac_ctx, NULL, m, NULL, mac_key);
499 EVP_PKEY_free(mac_key);
502 printf("which = %04X\nmac key=", which);
505 for (z = 0; z < i; z++)
506 printf("%02X%c", ms[z], ((z + 1) % 16) ? ' ' : '\n');
511 * In here I set both the read and write key/iv to the same value
512 * since only the correct one will be used :-).
514 if (!tls1_PRF(ssl_get_algorithm2(s),
515 exp_label, exp_label_len,
516 s->s3->client_random, SSL3_RANDOM_SIZE,
517 s->s3->server_random, SSL3_RANDOM_SIZE,
519 key, j, tmp1, tmp2, EVP_CIPHER_key_length(c)))
524 if (!tls1_PRF(ssl_get_algorithm2(s),
525 TLS_MD_IV_BLOCK_CONST, TLS_MD_IV_BLOCK_CONST_SIZE,
526 s->s3->client_random, SSL3_RANDOM_SIZE,
527 s->s3->server_random, SSL3_RANDOM_SIZE,
528 NULL, 0, NULL, 0, empty, 0, iv1, iv2, k * 2))
537 s->session->key_arg_length = 0;
541 fprintf(stderr, "EVP_CipherInit_ex(dd,c,key=,iv=,which)\n");
542 fprintf(stderr, "\tkey= ");
543 for (i = 0; i < c->key_len; i++)
544 fprintf(stderr, "%02x", key[i]);
545 fprintf(stderr, "\n");
546 fprintf(stderr, "\t iv= ");
547 for (i = 0; i < c->iv_len; i++)
548 fprintf(stderr, "%02x", iv[i]);
549 fprintf(stderr, "\n");
551 #endif /* KSSL_DEBUG */
553 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) {
554 if (!EVP_CipherInit_ex(dd, c, NULL, key, NULL, (which & SSL3_CC_WRITE))
555 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, k, iv)) {
556 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
560 if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE))) {
561 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
565 /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
566 if ((EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size
567 && !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_MAC_KEY,
568 *mac_secret_size, mac_secret)) {
569 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
574 printf("which = %04X\nkey=", which);
577 for (z = 0; z < EVP_CIPHER_key_length(c); z++)
578 printf("%02X%c", key[z], ((z + 1) % 16) ? ' ' : '\n');
583 for (z = 0; z < k; z++)
584 printf("%02X%c", iv[z], ((z + 1) % 16) ? ' ' : '\n');
589 OPENSSL_cleanse(tmp1, sizeof(tmp1));
590 OPENSSL_cleanse(tmp2, sizeof(tmp1));
591 OPENSSL_cleanse(iv1, sizeof(iv1));
592 OPENSSL_cleanse(iv2, sizeof(iv2));
595 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_MALLOC_FAILURE);
600 int tls1_setup_key_block(SSL *s)
602 unsigned char *p1, *p2 = NULL;
607 int mac_type = NID_undef, mac_secret_size = 0;
611 fprintf(stderr, "tls1_setup_key_block()\n");
612 #endif /* KSSL_DEBUG */
614 if (s->s3->tmp.key_block_length != 0)
617 if (!ssl_cipher_get_evp
618 (s->session, &c, &hash, &mac_type, &mac_secret_size, &comp)) {
619 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK, SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
623 s->s3->tmp.new_sym_enc = c;
624 s->s3->tmp.new_hash = hash;
625 s->s3->tmp.new_mac_pkey_type = mac_type;
626 s->s3->tmp.new_mac_secret_size = mac_secret_size;
628 EVP_CIPHER_key_length(c) + mac_secret_size + EVP_CIPHER_iv_length(c);
631 ssl3_cleanup_key_block(s);
633 if ((p1 = (unsigned char *)OPENSSL_malloc(num)) == NULL) {
634 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK, ERR_R_MALLOC_FAILURE);
638 s->s3->tmp.key_block_length = num;
639 s->s3->tmp.key_block = p1;
641 if ((p2 = (unsigned char *)OPENSSL_malloc(num)) == NULL) {
642 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK, ERR_R_MALLOC_FAILURE);
647 printf("client random\n");
650 for (z = 0; z < SSL3_RANDOM_SIZE; z++)
651 printf("%02X%c", s->s3->client_random[z],
652 ((z + 1) % 16) ? ' ' : '\n');
654 printf("server random\n");
657 for (z = 0; z < SSL3_RANDOM_SIZE; z++)
658 printf("%02X%c", s->s3->server_random[z],
659 ((z + 1) % 16) ? ' ' : '\n');
661 printf("pre-master\n");
664 for (z = 0; z < s->session->master_key_length; z++)
665 printf("%02X%c", s->session->master_key[z],
666 ((z + 1) % 16) ? ' ' : '\n');
669 if (!tls1_generate_key_block(s, p1, p2, num))
672 printf("\nkey block\n");
675 for (z = 0; z < num; z++)
676 printf("%02X%c", p1[z], ((z + 1) % 16) ? ' ' : '\n');
680 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)
681 && s->method->version <= TLS1_VERSION) {
683 * enable vulnerability countermeasure for CBC ciphers with known-IV
684 * problem (http://www.openssl.org/~bodo/tls-cbc.txt)
686 s->s3->need_empty_fragments = 1;
688 if (s->session->cipher != NULL) {
689 if (s->session->cipher->algorithm_enc == SSL_eNULL)
690 s->s3->need_empty_fragments = 0;
692 #ifndef OPENSSL_NO_RC4
693 if (s->session->cipher->algorithm_enc == SSL_RC4)
694 s->s3->need_empty_fragments = 0;
702 OPENSSL_cleanse(p2, num);
709 * tls1_enc encrypts/decrypts the record in |s->wrec| / |s->rrec|, respectively.
712 * 0: (in non-constant time) if the record is publically invalid (i.e. too
714 * 1: if the record's padding is valid / the encryption was successful.
715 * -1: if the record's padding/AEAD-authenticator is invalid or, if sending,
716 * an internal error occured.
718 int tls1_enc(SSL *s, int send)
723 int bs, i, j, k, pad = 0, ret, mac_size = 0;
724 const EVP_CIPHER *enc;
727 if (EVP_MD_CTX_md(s->write_hash)) {
728 int n = EVP_MD_CTX_size(s->write_hash);
729 OPENSSL_assert(n >= 0);
731 ds = s->enc_write_ctx;
732 rec = &(s->s3->wrec);
733 if (s->enc_write_ctx == NULL)
737 enc = EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
738 /* For TLSv1.1 and later explicit IV */
739 if (s->version >= TLS1_1_VERSION
740 && EVP_CIPHER_mode(enc) == EVP_CIPH_CBC_MODE)
741 ivlen = EVP_CIPHER_iv_length(enc);
745 if (rec->data != rec->input)
747 * we can't write into the input stream: Can this ever
751 "%s:%d: rec->data != rec->input\n",
753 else if (RAND_bytes(rec->input, ivlen) <= 0)
758 if (EVP_MD_CTX_md(s->read_hash)) {
759 int n = EVP_MD_CTX_size(s->read_hash);
760 OPENSSL_assert(n >= 0);
762 ds = s->enc_read_ctx;
763 rec = &(s->s3->rrec);
764 if (s->enc_read_ctx == NULL)
767 enc = EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
771 fprintf(stderr, "tls1_enc(%d)\n", send);
772 #endif /* KSSL_DEBUG */
774 if ((s->session == NULL) || (ds == NULL) || (enc == NULL)) {
775 memmove(rec->data, rec->input, rec->length);
776 rec->input = rec->data;
780 bs = EVP_CIPHER_block_size(ds->cipher);
782 if (EVP_CIPHER_flags(ds->cipher) & EVP_CIPH_FLAG_AEAD_CIPHER) {
783 unsigned char buf[13], *seq;
785 seq = send ? s->s3->write_sequence : s->s3->read_sequence;
787 if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER) {
788 unsigned char dtlsseq[9], *p = dtlsseq;
790 s2n(send ? s->d1->w_epoch : s->d1->r_epoch, p);
791 memcpy(p, &seq[2], 6);
792 memcpy(buf, dtlsseq, 8);
795 for (i = 7; i >= 0; i--) { /* increment */
803 buf[9] = (unsigned char)(s->version >> 8);
804 buf[10] = (unsigned char)(s->version);
805 buf[11] = rec->length >> 8;
806 buf[12] = rec->length & 0xff;
807 pad = EVP_CIPHER_CTX_ctrl(ds, EVP_CTRL_AEAD_TLS1_AAD, 13, buf);
812 } else if ((bs != 1) && send) {
813 i = bs - ((int)l % bs);
815 /* Add weird padding of upto 256 bytes */
817 /* we need to add 'i' padding bytes of value j */
819 if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG) {
820 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
823 for (k = (int)l; k < (int)(l + i); k++)
832 "EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
833 ds, rec->data, rec->input, l);
835 "\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%lu %lu], %d iv_len\n",
836 ds->buf_len, ds->cipher->key_len, DES_KEY_SZ,
837 DES_SCHEDULE_SZ, ds->cipher->iv_len);
838 fprintf(stderr, "\t\tIV: ");
839 for (i = 0; i < ds->cipher->iv_len; i++)
840 fprintf(stderr, "%02X", ds->iv[i]);
841 fprintf(stderr, "\n");
842 fprintf(stderr, "\trec->input=");
843 for (ui = 0; ui < l; ui++)
844 fprintf(stderr, " %02x", rec->input[ui]);
845 fprintf(stderr, "\n");
847 #endif /* KSSL_DEBUG */
850 if (l == 0 || l % bs != 0)
854 i = EVP_Cipher(ds, rec->data, rec->input, l);
855 if ((EVP_CIPHER_flags(ds->cipher) & EVP_CIPH_FLAG_CUSTOM_CIPHER)
858 return -1; /* AEAD can fail to verify MAC */
859 if (EVP_CIPHER_mode(enc) == EVP_CIPH_GCM_MODE && !send) {
860 rec->data += EVP_GCM_TLS_EXPLICIT_IV_LEN;
861 rec->input += EVP_GCM_TLS_EXPLICIT_IV_LEN;
862 rec->length -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
867 fprintf(stderr, "\trec->data=");
868 for (i = 0; i < l; i++)
869 fprintf(stderr, " %02x", rec->data[i]);
870 fprintf(stderr, "\n");
872 #endif /* KSSL_DEBUG */
875 if (EVP_MD_CTX_md(s->read_hash) != NULL)
876 mac_size = EVP_MD_CTX_size(s->read_hash);
877 if ((bs != 1) && !send)
878 ret = tls1_cbc_remove_padding(s, rec, bs, mac_size);
885 int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out)
888 EVP_MD_CTX ctx, *d = NULL;
891 if (s->s3->handshake_buffer)
892 if (!ssl3_digest_cached_records(s))
895 for (i = 0; i < SSL_MAX_DIGEST; i++) {
896 if (s->s3->handshake_dgst[i]
897 && EVP_MD_CTX_type(s->s3->handshake_dgst[i]) == md_nid) {
898 d = s->s3->handshake_dgst[i];
903 SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC, SSL_R_NO_REQUIRED_DIGEST);
907 EVP_MD_CTX_init(&ctx);
908 EVP_MD_CTX_copy_ex(&ctx, d);
909 EVP_DigestFinal_ex(&ctx, out, &ret);
910 EVP_MD_CTX_cleanup(&ctx);
914 int tls1_final_finish_mac(SSL *s,
915 const char *str, int slen, unsigned char *out)
919 unsigned char buf[2 * EVP_MAX_MD_SIZE];
920 unsigned char *q, buf2[12];
928 if (s->s3->handshake_buffer)
929 if (!ssl3_digest_cached_records(s))
932 EVP_MD_CTX_init(&ctx);
934 for (idx = 0; ssl_get_handshake_digest(idx, &mask, &md); idx++) {
935 if (mask & ssl_get_algorithm2(s)) {
936 int hashsize = EVP_MD_size(md);
937 EVP_MD_CTX *hdgst = s->s3->handshake_dgst[idx];
938 if (!hdgst || hashsize < 0
939 || hashsize > (int)(sizeof buf - (size_t)(q - buf))) {
941 * internal error: 'buf' is too small for this cipersuite!
945 if (!EVP_MD_CTX_copy_ex(&ctx, hdgst) ||
946 !EVP_DigestFinal_ex(&ctx, q, &i) ||
947 (i != (unsigned int)hashsize))
954 if (!tls1_PRF(ssl_get_algorithm2(s),
955 str, slen, buf, (int)(q - buf), NULL, 0, NULL, 0, NULL, 0,
956 s->session->master_key, s->session->master_key_length,
957 out, buf2, sizeof buf2))
959 EVP_MD_CTX_cleanup(&ctx);
967 int tls1_mac(SSL *ssl, unsigned char *md, int send)
972 size_t md_size, orig_len;
974 EVP_MD_CTX hmac, *mac_ctx;
975 unsigned char header[13];
976 int stream_mac = (send ? (ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM)
977 : (ssl->mac_flags & SSL_MAC_FLAG_READ_MAC_STREAM));
981 rec = &(ssl->s3->wrec);
982 seq = &(ssl->s3->write_sequence[0]);
983 hash = ssl->write_hash;
985 rec = &(ssl->s3->rrec);
986 seq = &(ssl->s3->read_sequence[0]);
987 hash = ssl->read_hash;
990 t = EVP_MD_CTX_size(hash);
991 OPENSSL_assert(t >= 0);
994 /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
998 if (!EVP_MD_CTX_copy(&hmac, hash))
1003 if (ssl->version == DTLS1_VERSION || ssl->version == DTLS1_BAD_VER) {
1004 unsigned char dtlsseq[8], *p = dtlsseq;
1006 s2n(send ? ssl->d1->w_epoch : ssl->d1->r_epoch, p);
1007 memcpy(p, &seq[2], 6);
1009 memcpy(header, dtlsseq, 8);
1011 memcpy(header, seq, 8);
1014 * kludge: tls1_cbc_remove_padding passes padding length in rec->type
1016 orig_len = rec->length + md_size + ((unsigned int)rec->type >> 8);
1019 header[8] = rec->type;
1020 header[9] = (unsigned char)(ssl->version >> 8);
1021 header[10] = (unsigned char)(ssl->version);
1022 header[11] = (rec->length) >> 8;
1023 header[12] = (rec->length) & 0xff;
1026 EVP_CIPHER_CTX_mode(ssl->enc_read_ctx) == EVP_CIPH_CBC_MODE &&
1027 ssl3_cbc_record_digest_supported(mac_ctx)) {
1029 * This is a CBC-encrypted record. We must avoid leaking any
1030 * timing-side channel information about how many blocks of data we
1031 * are hashing because that gives an attacker a timing-oracle.
1033 /* Final param == not SSLv3 */
1034 ssl3_cbc_digest_record(mac_ctx,
1037 rec->length + md_size, orig_len,
1038 ssl->s3->read_mac_secret,
1039 ssl->s3->read_mac_secret_size, 0);
1041 EVP_DigestSignUpdate(mac_ctx, header, sizeof(header));
1042 EVP_DigestSignUpdate(mac_ctx, rec->input, rec->length);
1043 t = EVP_DigestSignFinal(mac_ctx, md, &md_size);
1044 OPENSSL_assert(t > 0);
1046 if (!send && FIPS_mode())
1047 tls_fips_digest_extra(ssl->enc_read_ctx,
1048 mac_ctx, rec->input, rec->length, orig_len);
1053 EVP_MD_CTX_cleanup(&hmac);
1055 fprintf(stderr, "seq=");
1058 for (z = 0; z < 8; z++)
1059 fprintf(stderr, "%02X ", seq[z]);
1060 fprintf(stderr, "\n");
1062 fprintf(stderr, "rec=");
1065 for (z = 0; z < rec->length; z++)
1066 fprintf(stderr, "%02X ", rec->data[z]);
1067 fprintf(stderr, "\n");
1071 if (ssl->version != DTLS1_VERSION && ssl->version != DTLS1_BAD_VER) {
1072 for (i = 7; i >= 0; i--) {
1081 for (z = 0; z < md_size; z++)
1082 fprintf(stderr, "%02X ", md[z]);
1083 fprintf(stderr, "\n");
1089 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
1092 unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
1093 const void *co = NULL, *so = NULL;
1094 int col = 0, sol = 0;
1097 fprintf(stderr, "tls1_generate_master_secret(%p,%p, %p, %d)\n", s, out, p,
1099 #endif /* KSSL_DEBUG */
1101 #ifdef TLSEXT_TYPE_opaque_prf_input
1102 if (s->s3->client_opaque_prf_input != NULL
1103 && s->s3->server_opaque_prf_input != NULL
1104 && s->s3->client_opaque_prf_input_len > 0
1105 && s->s3->client_opaque_prf_input_len ==
1106 s->s3->server_opaque_prf_input_len) {
1107 co = s->s3->client_opaque_prf_input;
1108 col = s->s3->server_opaque_prf_input_len;
1109 so = s->s3->server_opaque_prf_input;
1111 * must be same as col (see
1112 * draft-resc-00.txts-opaque-prf-input-00.txt, section 3.1)
1114 sol = s->s3->client_opaque_prf_input_len;
1118 tls1_PRF(ssl_get_algorithm2(s),
1119 TLS_MD_MASTER_SECRET_CONST, TLS_MD_MASTER_SECRET_CONST_SIZE,
1120 s->s3->client_random, SSL3_RANDOM_SIZE,
1122 s->s3->server_random, SSL3_RANDOM_SIZE,
1123 so, sol, p, len, s->session->master_key, buff, sizeof buff);
1125 fprintf(stderr, "Premaster Secret:\n");
1126 BIO_dump_fp(stderr, (char *)p, len);
1127 fprintf(stderr, "Client Random:\n");
1128 BIO_dump_fp(stderr, (char *)s->s3->client_random, SSL3_RANDOM_SIZE);
1129 fprintf(stderr, "Server Random:\n");
1130 BIO_dump_fp(stderr, (char *)s->s3->server_random, SSL3_RANDOM_SIZE);
1131 fprintf(stderr, "Master Secret:\n");
1132 BIO_dump_fp(stderr, (char *)s->session->master_key,
1133 SSL3_MASTER_SECRET_SIZE);
1137 fprintf(stderr, "tls1_generate_master_secret() complete\n");
1138 #endif /* KSSL_DEBUG */
1139 return (SSL3_MASTER_SECRET_SIZE);
1142 int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1143 const char *label, size_t llen,
1144 const unsigned char *context,
1145 size_t contextlen, int use_context)
1147 unsigned char *buff;
1148 unsigned char *val = NULL;
1149 size_t vallen, currentvalpos;
1153 fprintf(stderr, "tls1_export_keying_material(%p,%p,%lu,%s,%lu,%p,%lu)\n",
1154 s, out, olen, label, llen, context, contextlen);
1155 #endif /* KSSL_DEBUG */
1157 buff = OPENSSL_malloc(olen);
1162 * construct PRF arguments we construct the PRF argument ourself rather
1163 * than passing separate values into the TLS PRF to ensure that the
1164 * concatenation of values does not create a prohibited label.
1166 vallen = llen + SSL3_RANDOM_SIZE * 2;
1168 vallen += 2 + contextlen;
1171 val = OPENSSL_malloc(vallen);
1175 memcpy(val + currentvalpos, (unsigned char *)label, llen);
1176 currentvalpos += llen;
1177 memcpy(val + currentvalpos, s->s3->client_random, SSL3_RANDOM_SIZE);
1178 currentvalpos += SSL3_RANDOM_SIZE;
1179 memcpy(val + currentvalpos, s->s3->server_random, SSL3_RANDOM_SIZE);
1180 currentvalpos += SSL3_RANDOM_SIZE;
1183 val[currentvalpos] = (contextlen >> 8) & 0xff;
1185 val[currentvalpos] = contextlen & 0xff;
1187 if ((contextlen > 0) || (context != NULL)) {
1188 memcpy(val + currentvalpos, context, contextlen);
1193 * disallow prohibited labels note that SSL3_RANDOM_SIZE > max(prohibited
1194 * label len) = 15, so size of val > max(prohibited label len) = 15 and
1195 * the comparisons won't have buffer overflow
1197 if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST,
1198 TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0)
1200 if (memcmp(val, TLS_MD_SERVER_FINISH_CONST,
1201 TLS_MD_SERVER_FINISH_CONST_SIZE) == 0)
1203 if (memcmp(val, TLS_MD_MASTER_SECRET_CONST,
1204 TLS_MD_MASTER_SECRET_CONST_SIZE) == 0)
1206 if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST,
1207 TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0)
1210 rv = tls1_PRF(ssl_get_algorithm2(s),
1216 s->session->master_key, s->session->master_key_length,
1220 fprintf(stderr, "tls1_export_keying_material() complete\n");
1221 #endif /* KSSL_DEBUG */
1224 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL,
1225 SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
1229 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE);
1239 int tls1_alert_code(int code)
1242 case SSL_AD_CLOSE_NOTIFY:
1243 return (SSL3_AD_CLOSE_NOTIFY);
1244 case SSL_AD_UNEXPECTED_MESSAGE:
1245 return (SSL3_AD_UNEXPECTED_MESSAGE);
1246 case SSL_AD_BAD_RECORD_MAC:
1247 return (SSL3_AD_BAD_RECORD_MAC);
1248 case SSL_AD_DECRYPTION_FAILED:
1249 return (TLS1_AD_DECRYPTION_FAILED);
1250 case SSL_AD_RECORD_OVERFLOW:
1251 return (TLS1_AD_RECORD_OVERFLOW);
1252 case SSL_AD_DECOMPRESSION_FAILURE:
1253 return (SSL3_AD_DECOMPRESSION_FAILURE);
1254 case SSL_AD_HANDSHAKE_FAILURE:
1255 return (SSL3_AD_HANDSHAKE_FAILURE);
1256 case SSL_AD_NO_CERTIFICATE:
1258 case SSL_AD_BAD_CERTIFICATE:
1259 return (SSL3_AD_BAD_CERTIFICATE);
1260 case SSL_AD_UNSUPPORTED_CERTIFICATE:
1261 return (SSL3_AD_UNSUPPORTED_CERTIFICATE);
1262 case SSL_AD_CERTIFICATE_REVOKED:
1263 return (SSL3_AD_CERTIFICATE_REVOKED);
1264 case SSL_AD_CERTIFICATE_EXPIRED:
1265 return (SSL3_AD_CERTIFICATE_EXPIRED);
1266 case SSL_AD_CERTIFICATE_UNKNOWN:
1267 return (SSL3_AD_CERTIFICATE_UNKNOWN);
1268 case SSL_AD_ILLEGAL_PARAMETER:
1269 return (SSL3_AD_ILLEGAL_PARAMETER);
1270 case SSL_AD_UNKNOWN_CA:
1271 return (TLS1_AD_UNKNOWN_CA);
1272 case SSL_AD_ACCESS_DENIED:
1273 return (TLS1_AD_ACCESS_DENIED);
1274 case SSL_AD_DECODE_ERROR:
1275 return (TLS1_AD_DECODE_ERROR);
1276 case SSL_AD_DECRYPT_ERROR:
1277 return (TLS1_AD_DECRYPT_ERROR);
1278 case SSL_AD_EXPORT_RESTRICTION:
1279 return (TLS1_AD_EXPORT_RESTRICTION);
1280 case SSL_AD_PROTOCOL_VERSION:
1281 return (TLS1_AD_PROTOCOL_VERSION);
1282 case SSL_AD_INSUFFICIENT_SECURITY:
1283 return (TLS1_AD_INSUFFICIENT_SECURITY);
1284 case SSL_AD_INTERNAL_ERROR:
1285 return (TLS1_AD_INTERNAL_ERROR);
1286 case SSL_AD_USER_CANCELLED:
1287 return (TLS1_AD_USER_CANCELLED);
1288 case SSL_AD_NO_RENEGOTIATION:
1289 return (TLS1_AD_NO_RENEGOTIATION);
1290 case SSL_AD_UNSUPPORTED_EXTENSION:
1291 return (TLS1_AD_UNSUPPORTED_EXTENSION);
1292 case SSL_AD_CERTIFICATE_UNOBTAINABLE:
1293 return (TLS1_AD_CERTIFICATE_UNOBTAINABLE);
1294 case SSL_AD_UNRECOGNIZED_NAME:
1295 return (TLS1_AD_UNRECOGNIZED_NAME);
1296 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
1297 return (TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
1298 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
1299 return (TLS1_AD_BAD_CERTIFICATE_HASH_VALUE);
1300 case SSL_AD_UNKNOWN_PSK_IDENTITY:
1301 return (TLS1_AD_UNKNOWN_PSK_IDENTITY);
1302 case SSL_AD_INAPPROPRIATE_FALLBACK:
1303 return (TLS1_AD_INAPPROPRIATE_FALLBACK);
1305 /* not appropriate for TLS, not used for DTLS */
1306 case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE:
1307 return (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);