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 #include <openssl/evp.h>
141 #include <openssl/md5.h>
143 static unsigned char ssl3_pad_1[48] = {
144 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
145 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
146 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
147 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
148 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
149 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36
152 static unsigned char ssl3_pad_2[48] = {
153 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c,
154 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c,
155 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c,
156 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c,
157 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c,
158 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c
161 static int ssl3_handshake_mac(SSL *s, int md_nid,
162 const char *sender, int len, unsigned char *p);
163 static int ssl3_generate_key_block(SSL *s, unsigned char *km, int num)
167 unsigned char buf[16], smd[SHA_DIGEST_LENGTH];
168 unsigned char c = 'A';
169 unsigned int i, j, k;
171 #ifdef CHARSET_EBCDIC
172 c = os_toascii[c]; /* 'A' in ASCII */
175 EVP_MD_CTX_init(&m5);
176 EVP_MD_CTX_set_flags(&m5, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
177 EVP_MD_CTX_init(&s1);
178 for (i = 0; (int)i < num; i += MD5_DIGEST_LENGTH) {
180 if (k > sizeof buf) {
181 /* bug: 'buf' is too small for this ciphersuite */
182 SSLerr(SSL_F_SSL3_GENERATE_KEY_BLOCK, ERR_R_INTERNAL_ERROR);
186 for (j = 0; j < k; j++)
189 EVP_DigestInit_ex(&s1, EVP_sha1(), NULL);
190 EVP_DigestUpdate(&s1, buf, k);
191 EVP_DigestUpdate(&s1, s->session->master_key,
192 s->session->master_key_length);
193 EVP_DigestUpdate(&s1, s->s3->server_random, SSL3_RANDOM_SIZE);
194 EVP_DigestUpdate(&s1, s->s3->client_random, SSL3_RANDOM_SIZE);
195 EVP_DigestFinal_ex(&s1, smd, NULL);
197 EVP_DigestInit_ex(&m5, EVP_md5(), NULL);
198 EVP_DigestUpdate(&m5, s->session->master_key,
199 s->session->master_key_length);
200 EVP_DigestUpdate(&m5, smd, SHA_DIGEST_LENGTH);
201 if ((int)(i + MD5_DIGEST_LENGTH) > num) {
202 EVP_DigestFinal_ex(&m5, smd, NULL);
203 memcpy(km, smd, (num - i));
205 EVP_DigestFinal_ex(&m5, km, NULL);
207 km += MD5_DIGEST_LENGTH;
209 OPENSSL_cleanse(smd, SHA_DIGEST_LENGTH);
210 EVP_MD_CTX_cleanup(&m5);
211 EVP_MD_CTX_cleanup(&s1);
215 int ssl3_change_cipher_state(SSL *s, int which)
217 unsigned char *p, *mac_secret;
218 unsigned char exp_key[EVP_MAX_KEY_LENGTH];
219 unsigned char exp_iv[EVP_MAX_IV_LENGTH];
220 unsigned char *ms, *key, *iv, *er1, *er2;
223 #ifndef OPENSSL_NO_COMP
228 int is_exp, n, i, j, k, cl;
231 is_exp = SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
232 c = s->s3->tmp.new_sym_enc;
233 m = s->s3->tmp.new_hash;
234 /* m == NULL will lead to a crash later */
236 #ifndef OPENSSL_NO_COMP
237 if (s->s3->tmp.new_compression == NULL)
240 comp = s->s3->tmp.new_compression->method;
243 if (which & SSL3_CC_READ) {
244 if (s->enc_read_ctx != NULL)
246 else if ((s->enc_read_ctx =
247 OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
251 * make sure it's intialized in case we exit later with an error
253 EVP_CIPHER_CTX_init(s->enc_read_ctx);
254 dd = s->enc_read_ctx;
256 ssl_replace_hash(&s->read_hash, m);
257 #ifndef OPENSSL_NO_COMP
259 if (s->expand != NULL) {
260 COMP_CTX_free(s->expand);
264 s->expand = COMP_CTX_new(comp);
265 if (s->expand == NULL) {
266 SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,
267 SSL_R_COMPRESSION_LIBRARY_ERROR);
270 if (s->s3->rrec.comp == NULL)
271 s->s3->rrec.comp = (unsigned char *)
272 OPENSSL_malloc(SSL3_RT_MAX_PLAIN_LENGTH);
273 if (s->s3->rrec.comp == NULL)
277 memset(&(s->s3->read_sequence[0]), 0, 8);
278 mac_secret = &(s->s3->read_mac_secret[0]);
280 if (s->enc_write_ctx != NULL)
282 else if ((s->enc_write_ctx =
283 OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
287 * make sure it's intialized in case we exit later with an error
289 EVP_CIPHER_CTX_init(s->enc_write_ctx);
290 dd = s->enc_write_ctx;
291 ssl_replace_hash(&s->write_hash, m);
292 #ifndef OPENSSL_NO_COMP
294 if (s->compress != NULL) {
295 COMP_CTX_free(s->compress);
299 s->compress = COMP_CTX_new(comp);
300 if (s->compress == NULL) {
301 SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,
302 SSL_R_COMPRESSION_LIBRARY_ERROR);
307 memset(&(s->s3->write_sequence[0]), 0, 8);
308 mac_secret = &(s->s3->write_mac_secret[0]);
312 EVP_CIPHER_CTX_cleanup(dd);
314 p = s->s3->tmp.key_block;
318 cl = EVP_CIPHER_key_length(c);
319 j = is_exp ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
320 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
321 /* Was j=(is_exp)?5:EVP_CIPHER_key_length(c); */
322 k = EVP_CIPHER_iv_length(c);
323 if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
324 (which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
331 er1 = &(s->s3->client_random[0]);
332 er2 = &(s->s3->server_random[0]);
341 er1 = &(s->s3->server_random[0]);
342 er2 = &(s->s3->client_random[0]);
345 if (n > s->s3->tmp.key_block_length) {
346 SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
350 EVP_MD_CTX_init(&md);
351 memcpy(mac_secret, ms, i);
354 * In here I set both the read and write key/iv to the same value
355 * since only the correct one will be used :-).
357 EVP_DigestInit_ex(&md, EVP_md5(), NULL);
358 EVP_DigestUpdate(&md, key, j);
359 EVP_DigestUpdate(&md, er1, SSL3_RANDOM_SIZE);
360 EVP_DigestUpdate(&md, er2, SSL3_RANDOM_SIZE);
361 EVP_DigestFinal_ex(&md, &(exp_key[0]), NULL);
365 EVP_DigestInit_ex(&md, EVP_md5(), NULL);
366 EVP_DigestUpdate(&md, er1, SSL3_RANDOM_SIZE);
367 EVP_DigestUpdate(&md, er2, SSL3_RANDOM_SIZE);
368 EVP_DigestFinal_ex(&md, &(exp_iv[0]), NULL);
373 s->session->key_arg_length = 0;
375 EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE));
377 OPENSSL_cleanse(&(exp_key[0]), sizeof(exp_key));
378 OPENSSL_cleanse(&(exp_iv[0]), sizeof(exp_iv));
379 EVP_MD_CTX_cleanup(&md);
382 SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE, ERR_R_MALLOC_FAILURE);
387 int ssl3_setup_key_block(SSL *s)
396 if (s->s3->tmp.key_block_length != 0)
399 if (!ssl_cipher_get_evp(s->session, &c, &hash, NULL, NULL, &comp)) {
400 SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK, SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
404 s->s3->tmp.new_sym_enc = c;
405 s->s3->tmp.new_hash = hash;
406 #ifdef OPENSSL_NO_COMP
407 s->s3->tmp.new_compression = NULL;
409 s->s3->tmp.new_compression = comp;
412 num = EVP_MD_size(hash);
416 num = EVP_CIPHER_key_length(c) + num + EVP_CIPHER_iv_length(c);
419 ssl3_cleanup_key_block(s);
421 if ((p = OPENSSL_malloc(num)) == NULL)
424 s->s3->tmp.key_block_length = num;
425 s->s3->tmp.key_block = p;
427 ret = ssl3_generate_key_block(s, p, num);
429 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) {
431 * enable vulnerability countermeasure for CBC ciphers with known-IV
432 * problem (http://www.openssl.org/~bodo/tls-cbc.txt)
434 s->s3->need_empty_fragments = 1;
436 if (s->session->cipher != NULL) {
437 if (s->session->cipher->algorithm_enc == SSL_eNULL)
438 s->s3->need_empty_fragments = 0;
440 #ifndef OPENSSL_NO_RC4
441 if (s->session->cipher->algorithm_enc == SSL_RC4)
442 s->s3->need_empty_fragments = 0;
450 SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK, ERR_R_MALLOC_FAILURE);
454 void ssl3_cleanup_key_block(SSL *s)
456 if (s->s3->tmp.key_block != NULL) {
457 OPENSSL_cleanse(s->s3->tmp.key_block, s->s3->tmp.key_block_length);
458 OPENSSL_free(s->s3->tmp.key_block);
459 s->s3->tmp.key_block = NULL;
461 s->s3->tmp.key_block_length = 0;
465 * ssl3_enc encrypts/decrypts the record in |s->wrec| / |s->rrec|, respectively.
468 * 0: (in non-constant time) if the record is publically invalid (i.e. too
470 * 1: if the record's padding is valid / the encryption was successful.
471 * -1: if the record's padding is invalid or, if sending, an internal error
474 int ssl3_enc(SSL *s, int send)
479 int bs, i, mac_size = 0;
480 const EVP_CIPHER *enc;
483 ds = s->enc_write_ctx;
484 rec = &(s->s3->wrec);
485 if (s->enc_write_ctx == NULL)
488 enc = EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
490 ds = s->enc_read_ctx;
491 rec = &(s->s3->rrec);
492 if (s->enc_read_ctx == NULL)
495 enc = EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
498 if ((s->session == NULL) || (ds == NULL) || (enc == NULL)) {
499 memmove(rec->data, rec->input, rec->length);
500 rec->input = rec->data;
503 bs = EVP_CIPHER_block_size(ds->cipher);
507 if ((bs != 1) && send) {
508 i = bs - ((int)l % bs);
510 /* we need to add 'i-1' padding bytes */
513 * the last of these zero bytes will be overwritten with the
516 memset(&rec->input[rec->length], 0, i);
518 rec->input[l - 1] = (i - 1);
522 if (l == 0 || l % bs != 0)
524 /* otherwise, rec->length >= bs */
527 if (EVP_Cipher(ds, rec->data, rec->input, l) < 1)
530 if (EVP_MD_CTX_md(s->read_hash) != NULL)
531 mac_size = EVP_MD_CTX_size(s->read_hash);
532 if ((bs != 1) && !send)
533 return ssl3_cbc_remove_padding(s, rec, bs, mac_size);
538 void ssl3_init_finished_mac(SSL *s)
540 if (s->s3->handshake_buffer)
541 BIO_free(s->s3->handshake_buffer);
542 if (s->s3->handshake_dgst)
543 ssl3_free_digest_list(s);
544 s->s3->handshake_buffer = BIO_new(BIO_s_mem());
545 (void)BIO_set_close(s->s3->handshake_buffer, BIO_CLOSE);
548 void ssl3_free_digest_list(SSL *s)
551 if (!s->s3->handshake_dgst)
553 for (i = 0; i < SSL_MAX_DIGEST; i++) {
554 if (s->s3->handshake_dgst[i])
555 EVP_MD_CTX_destroy(s->s3->handshake_dgst[i]);
557 OPENSSL_free(s->s3->handshake_dgst);
558 s->s3->handshake_dgst = NULL;
561 void ssl3_finish_mac(SSL *s, const unsigned char *buf, int len)
563 if (s->s3->handshake_buffer
564 && !(s->s3->flags & TLS1_FLAGS_KEEP_HANDSHAKE)) {
565 BIO_write(s->s3->handshake_buffer, (void *)buf, len);
568 for (i = 0; i < SSL_MAX_DIGEST; i++) {
569 if (s->s3->handshake_dgst[i] != NULL)
570 EVP_DigestUpdate(s->s3->handshake_dgst[i], buf, len);
575 int ssl3_digest_cached_records(SSL *s)
583 /* Allocate handshake_dgst array */
584 ssl3_free_digest_list(s);
585 s->s3->handshake_dgst =
586 OPENSSL_malloc(SSL_MAX_DIGEST * sizeof(EVP_MD_CTX *));
587 memset(s->s3->handshake_dgst, 0, SSL_MAX_DIGEST * sizeof(EVP_MD_CTX *));
588 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
590 SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS, SSL_R_BAD_HANDSHAKE_LENGTH);
594 /* Loop through bitso of algorithm2 field and create MD_CTX-es */
595 for (i = 0; ssl_get_handshake_digest(i, &mask, &md); i++) {
596 if ((mask & ssl_get_algorithm2(s)) && md) {
597 s->s3->handshake_dgst[i] = EVP_MD_CTX_create();
599 if (EVP_MD_nid(md) == NID_md5) {
600 EVP_MD_CTX_set_flags(s->s3->handshake_dgst[i],
601 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
604 EVP_DigestInit_ex(s->s3->handshake_dgst[i], md, NULL);
605 EVP_DigestUpdate(s->s3->handshake_dgst[i], hdata, hdatalen);
607 s->s3->handshake_dgst[i] = NULL;
610 if (!(s->s3->flags & TLS1_FLAGS_KEEP_HANDSHAKE)) {
611 /* Free handshake_buffer BIO */
612 BIO_free(s->s3->handshake_buffer);
613 s->s3->handshake_buffer = NULL;
619 int ssl3_cert_verify_mac(SSL *s, int md_nid, unsigned char *p)
621 return (ssl3_handshake_mac(s, md_nid, NULL, 0, p));
624 int ssl3_final_finish_mac(SSL *s,
625 const char *sender, int len, unsigned char *p)
628 ret = ssl3_handshake_mac(s, NID_md5, sender, len, p);
634 sha1len = ssl3_handshake_mac(s, NID_sha1, sender, len, p);
642 static int ssl3_handshake_mac(SSL *s, int md_nid,
643 const char *sender, int len, unsigned char *p)
648 unsigned char md_buf[EVP_MAX_MD_SIZE];
649 EVP_MD_CTX ctx, *d = NULL;
651 if (s->s3->handshake_buffer)
652 if (!ssl3_digest_cached_records(s))
656 * Search for digest of specified type in the handshake_dgst array
658 for (i = 0; i < SSL_MAX_DIGEST; i++) {
659 if (s->s3->handshake_dgst[i]
660 && EVP_MD_CTX_type(s->s3->handshake_dgst[i]) == md_nid) {
661 d = s->s3->handshake_dgst[i];
666 SSLerr(SSL_F_SSL3_HANDSHAKE_MAC, SSL_R_NO_REQUIRED_DIGEST);
669 EVP_MD_CTX_init(&ctx);
670 EVP_MD_CTX_set_flags(&ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
671 EVP_MD_CTX_copy_ex(&ctx, d);
672 n = EVP_MD_CTX_size(&ctx);
678 EVP_DigestUpdate(&ctx, sender, len);
679 EVP_DigestUpdate(&ctx, s->session->master_key,
680 s->session->master_key_length);
681 EVP_DigestUpdate(&ctx, ssl3_pad_1, npad);
682 EVP_DigestFinal_ex(&ctx, md_buf, &i);
684 EVP_DigestInit_ex(&ctx, EVP_MD_CTX_md(&ctx), NULL);
685 EVP_DigestUpdate(&ctx, s->session->master_key,
686 s->session->master_key_length);
687 EVP_DigestUpdate(&ctx, ssl3_pad_2, npad);
688 EVP_DigestUpdate(&ctx, md_buf, i);
689 EVP_DigestFinal_ex(&ctx, p, &ret);
691 EVP_MD_CTX_cleanup(&ctx);
696 int n_ssl3_mac(SSL *ssl, unsigned char *md, int send)
699 unsigned char *mac_sec, *seq;
701 const EVP_MD_CTX *hash;
702 unsigned char *p, rec_char;
703 size_t md_size, orig_len;
708 rec = &(ssl->s3->wrec);
709 mac_sec = &(ssl->s3->write_mac_secret[0]);
710 seq = &(ssl->s3->write_sequence[0]);
711 hash = ssl->write_hash;
713 rec = &(ssl->s3->rrec);
714 mac_sec = &(ssl->s3->read_mac_secret[0]);
715 seq = &(ssl->s3->read_sequence[0]);
716 hash = ssl->read_hash;
719 t = EVP_MD_CTX_size(hash);
723 npad = (48 / md_size) * md_size;
726 * kludge: ssl3_cbc_remove_padding passes padding length in rec->type
728 orig_len = rec->length + md_size + ((unsigned int)rec->type >> 8);
732 EVP_CIPHER_CTX_mode(ssl->enc_read_ctx) == EVP_CIPH_CBC_MODE &&
733 ssl3_cbc_record_digest_supported(hash)) {
735 * This is a CBC-encrypted record. We must avoid leaking any
736 * timing-side channel information about how many blocks of data we
737 * are hashing because that gives an attacker a timing-oracle.
741 * npad is, at most, 48 bytes and that's with MD5:
742 * 16 + 48 + 8 (sequence bytes) + 1 + 2 = 75.
744 * With SHA-1 (the largest hash speced for SSLv3) the hash size
745 * goes up 4, but npad goes down by 8, resulting in a smaller
747 unsigned char header[75];
749 memcpy(header + j, mac_sec, md_size);
751 memcpy(header + j, ssl3_pad_1, npad);
753 memcpy(header + j, seq, 8);
755 header[j++] = rec->type;
756 header[j++] = rec->length >> 8;
757 header[j++] = rec->length & 0xff;
759 /* Final param == is SSLv3 */
760 ssl3_cbc_digest_record(hash,
763 rec->length + md_size, orig_len,
764 mac_sec, md_size, 1);
766 unsigned int md_size_u;
767 /* Chop the digest off the end :-) */
768 EVP_MD_CTX_init(&md_ctx);
770 EVP_MD_CTX_copy_ex(&md_ctx, hash);
771 EVP_DigestUpdate(&md_ctx, mac_sec, md_size);
772 EVP_DigestUpdate(&md_ctx, ssl3_pad_1, npad);
773 EVP_DigestUpdate(&md_ctx, seq, 8);
774 rec_char = rec->type;
775 EVP_DigestUpdate(&md_ctx, &rec_char, 1);
778 EVP_DigestUpdate(&md_ctx, md, 2);
779 EVP_DigestUpdate(&md_ctx, rec->input, rec->length);
780 EVP_DigestFinal_ex(&md_ctx, md, NULL);
782 EVP_MD_CTX_copy_ex(&md_ctx, hash);
783 EVP_DigestUpdate(&md_ctx, mac_sec, md_size);
784 EVP_DigestUpdate(&md_ctx, ssl3_pad_2, npad);
785 EVP_DigestUpdate(&md_ctx, md, md_size);
786 EVP_DigestFinal_ex(&md_ctx, md, &md_size_u);
789 EVP_MD_CTX_cleanup(&md_ctx);
792 ssl3_record_sequence_update(seq);
796 void ssl3_record_sequence_update(unsigned char *seq)
800 for (i = 7; i >= 0; i--) {
807 int ssl3_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
810 static const unsigned char *salt[3] = {
811 #ifndef CHARSET_EBCDIC
812 (const unsigned char *)"A",
813 (const unsigned char *)"BB",
814 (const unsigned char *)"CCC",
816 (const unsigned char *)"\x41",
817 (const unsigned char *)"\x42\x42",
818 (const unsigned char *)"\x43\x43\x43",
821 unsigned char buf[EVP_MAX_MD_SIZE];
826 EVP_MD_CTX_init(&ctx);
827 for (i = 0; i < 3; i++) {
828 EVP_DigestInit_ex(&ctx, s->ctx->sha1, NULL);
829 EVP_DigestUpdate(&ctx, salt[i], strlen((const char *)salt[i]));
830 EVP_DigestUpdate(&ctx, p, len);
831 EVP_DigestUpdate(&ctx, &(s->s3->client_random[0]), SSL3_RANDOM_SIZE);
832 EVP_DigestUpdate(&ctx, &(s->s3->server_random[0]), SSL3_RANDOM_SIZE);
833 EVP_DigestFinal_ex(&ctx, buf, &n);
835 EVP_DigestInit_ex(&ctx, s->ctx->md5, NULL);
836 EVP_DigestUpdate(&ctx, p, len);
837 EVP_DigestUpdate(&ctx, buf, n);
838 EVP_DigestFinal_ex(&ctx, out, &n);
842 EVP_MD_CTX_cleanup(&ctx);
846 int ssl3_alert_code(int code)
849 case SSL_AD_CLOSE_NOTIFY:
850 return (SSL3_AD_CLOSE_NOTIFY);
851 case SSL_AD_UNEXPECTED_MESSAGE:
852 return (SSL3_AD_UNEXPECTED_MESSAGE);
853 case SSL_AD_BAD_RECORD_MAC:
854 return (SSL3_AD_BAD_RECORD_MAC);
855 case SSL_AD_DECRYPTION_FAILED:
856 return (SSL3_AD_BAD_RECORD_MAC);
857 case SSL_AD_RECORD_OVERFLOW:
858 return (SSL3_AD_BAD_RECORD_MAC);
859 case SSL_AD_DECOMPRESSION_FAILURE:
860 return (SSL3_AD_DECOMPRESSION_FAILURE);
861 case SSL_AD_HANDSHAKE_FAILURE:
862 return (SSL3_AD_HANDSHAKE_FAILURE);
863 case SSL_AD_NO_CERTIFICATE:
864 return (SSL3_AD_NO_CERTIFICATE);
865 case SSL_AD_BAD_CERTIFICATE:
866 return (SSL3_AD_BAD_CERTIFICATE);
867 case SSL_AD_UNSUPPORTED_CERTIFICATE:
868 return (SSL3_AD_UNSUPPORTED_CERTIFICATE);
869 case SSL_AD_CERTIFICATE_REVOKED:
870 return (SSL3_AD_CERTIFICATE_REVOKED);
871 case SSL_AD_CERTIFICATE_EXPIRED:
872 return (SSL3_AD_CERTIFICATE_EXPIRED);
873 case SSL_AD_CERTIFICATE_UNKNOWN:
874 return (SSL3_AD_CERTIFICATE_UNKNOWN);
875 case SSL_AD_ILLEGAL_PARAMETER:
876 return (SSL3_AD_ILLEGAL_PARAMETER);
877 case SSL_AD_UNKNOWN_CA:
878 return (SSL3_AD_BAD_CERTIFICATE);
879 case SSL_AD_ACCESS_DENIED:
880 return (SSL3_AD_HANDSHAKE_FAILURE);
881 case SSL_AD_DECODE_ERROR:
882 return (SSL3_AD_HANDSHAKE_FAILURE);
883 case SSL_AD_DECRYPT_ERROR:
884 return (SSL3_AD_HANDSHAKE_FAILURE);
885 case SSL_AD_EXPORT_RESTRICTION:
886 return (SSL3_AD_HANDSHAKE_FAILURE);
887 case SSL_AD_PROTOCOL_VERSION:
888 return (SSL3_AD_HANDSHAKE_FAILURE);
889 case SSL_AD_INSUFFICIENT_SECURITY:
890 return (SSL3_AD_HANDSHAKE_FAILURE);
891 case SSL_AD_INTERNAL_ERROR:
892 return (SSL3_AD_HANDSHAKE_FAILURE);
893 case SSL_AD_USER_CANCELLED:
894 return (SSL3_AD_HANDSHAKE_FAILURE);
895 case SSL_AD_NO_RENEGOTIATION:
896 return (-1); /* Don't send it :-) */
897 case SSL_AD_UNSUPPORTED_EXTENSION:
898 return (SSL3_AD_HANDSHAKE_FAILURE);
899 case SSL_AD_CERTIFICATE_UNOBTAINABLE:
900 return (SSL3_AD_HANDSHAKE_FAILURE);
901 case SSL_AD_UNRECOGNIZED_NAME:
902 return (SSL3_AD_HANDSHAKE_FAILURE);
903 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
904 return (SSL3_AD_HANDSHAKE_FAILURE);
905 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
906 return (SSL3_AD_HANDSHAKE_FAILURE);
907 case SSL_AD_UNKNOWN_PSK_IDENTITY:
908 return (TLS1_AD_UNKNOWN_PSK_IDENTITY);
909 case SSL_AD_INAPPROPRIATE_FALLBACK:
910 return (TLS1_AD_INAPPROPRIATE_FALLBACK);