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) 1998-2002 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).
113 #include "ssl_locl.h"
114 #ifndef OPENSSL_NO_COMP
115 # include <openssl/comp.h>
117 #include <openssl/evp.h>
118 #include <openssl/hmac.h>
119 #include <openssl/md5.h>
121 # include <openssl/des.h>
124 static void tls1_P_hash(const EVP_MD *md, const unsigned char *sec,
125 int sec_len, unsigned char *seed, int seed_len,
126 unsigned char *out, int olen)
132 unsigned char A1[EVP_MAX_MD_SIZE];
135 chunk = EVP_MD_size(md);
138 HMAC_CTX_init(&ctx_tmp);
139 HMAC_CTX_set_flags(&ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
140 HMAC_CTX_set_flags(&ctx_tmp, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
141 HMAC_Init_ex(&ctx, sec, sec_len, md, NULL);
142 HMAC_Init_ex(&ctx_tmp, sec, sec_len, md, NULL);
143 HMAC_Update(&ctx, seed, seed_len);
144 HMAC_Final(&ctx, A1, &A1_len);
147 HMAC_Init_ex(&ctx, NULL, 0, NULL, NULL); /* re-init */
148 HMAC_Init_ex(&ctx_tmp, NULL, 0, NULL, NULL); /* re-init */
149 HMAC_Update(&ctx, A1, A1_len);
150 HMAC_Update(&ctx_tmp, A1, A1_len);
151 HMAC_Update(&ctx, seed, seed_len);
154 HMAC_Final(&ctx, out, &j);
157 /* calc the next A1 value */
158 HMAC_Final(&ctx_tmp, A1, &A1_len);
159 } else { /* last one */
161 HMAC_Final(&ctx, A1, &A1_len);
162 memcpy(out, A1, olen);
166 HMAC_CTX_cleanup(&ctx);
167 HMAC_CTX_cleanup(&ctx_tmp);
168 OPENSSL_cleanse(A1, sizeof(A1));
171 static void tls1_PRF(const EVP_MD *md5, const EVP_MD *sha1,
172 unsigned char *label, int label_len,
173 const unsigned char *sec, int slen, unsigned char *out1,
174 unsigned char *out2, int olen)
177 const unsigned char *S1, *S2;
182 len += (slen & 1); /* add for odd, make longer */
184 tls1_P_hash(md5, S1, len, label, label_len, out1, olen);
185 tls1_P_hash(sha1, S2, len, label, label_len, out2, olen);
187 for (i = 0; i < olen; i++)
191 static void tls1_generate_key_block(SSL *s, unsigned char *km,
192 unsigned char *tmp, int num)
195 unsigned char buf[SSL3_RANDOM_SIZE * 2 + TLS_MD_MAX_CONST_SIZE];
198 memcpy(p, TLS_MD_KEY_EXPANSION_CONST, TLS_MD_KEY_EXPANSION_CONST_SIZE);
199 p += TLS_MD_KEY_EXPANSION_CONST_SIZE;
200 memcpy(p, s->s3->server_random, SSL3_RANDOM_SIZE);
201 p += SSL3_RANDOM_SIZE;
202 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
203 p += SSL3_RANDOM_SIZE;
205 tls1_PRF(s->ctx->md5, s->ctx->sha1, buf, (int)(p - buf),
206 s->session->master_key, s->session->master_key_length,
209 printf("tls1_generate_key_block() ==> %d byte master_key =\n\t",
210 s->session->master_key_length);
213 for (i = 0; i < s->session->master_key_length; i++) {
214 printf("%02X", s->session->master_key[i]);
218 #endif /* KSSL_DEBUG */
221 int tls1_change_cipher_state(SSL *s, int which)
223 static const unsigned char empty[] = "";
224 unsigned char *p, *mac_secret;
225 unsigned char *exp_label, buf[TLS_MD_MAX_CONST_SIZE +
226 SSL3_RANDOM_SIZE * 2];
227 unsigned char tmp1[EVP_MAX_KEY_LENGTH];
228 unsigned char tmp2[EVP_MAX_KEY_LENGTH];
229 unsigned char iv1[EVP_MAX_IV_LENGTH * 2];
230 unsigned char iv2[EVP_MAX_IV_LENGTH * 2];
231 unsigned char *ms, *key, *iv;
235 #ifndef OPENSSL_NO_COMP
236 const SSL_COMP *comp;
239 int is_export, n, i, j, k, exp_label_len, cl;
242 is_export = SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
243 c = s->s3->tmp.new_sym_enc;
244 m = s->s3->tmp.new_hash;
245 #ifndef OPENSSL_NO_COMP
246 comp = s->s3->tmp.new_compression;
250 key_block = s->s3->tmp.key_block;
252 printf("tls1_change_cipher_state(which= %d) w/\n", which);
253 printf("\talg= %ld, comp= %p\n", s->s3->tmp.new_cipher->algorithms,
255 printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", (void *)c);
256 printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
257 c->nid, c->block_size, c->key_len, c->iv_len);
258 printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length);
261 for (ki = 0; ki < s->s3->tmp.key_block_length; ki++)
262 printf("%02x", s->s3->tmp.key_block[ki]);
265 #endif /* KSSL_DEBUG */
267 if (which & SSL3_CC_READ) {
268 if (s->enc_read_ctx != NULL)
270 else if ((s->enc_read_ctx =
271 OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
275 * make sure it's intialized in case we exit later with an error
277 EVP_CIPHER_CTX_init(s->enc_read_ctx);
278 dd = s->enc_read_ctx;
280 #ifndef OPENSSL_NO_COMP
281 if (s->expand != NULL) {
282 COMP_CTX_free(s->expand);
286 s->expand = COMP_CTX_new(comp->method);
287 if (s->expand == NULL) {
288 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,
289 SSL_R_COMPRESSION_LIBRARY_ERROR);
292 if (s->s3->rrec.comp == NULL)
293 s->s3->rrec.comp = (unsigned char *)
294 OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
295 if (s->s3->rrec.comp == NULL)
300 * this is done by dtls1_reset_seq_numbers for DTLS1_VERSION
302 if (s->version != DTLS1_VERSION)
303 memset(&(s->s3->read_sequence[0]), 0, 8);
304 mac_secret = &(s->s3->read_mac_secret[0]);
306 if (s->enc_write_ctx != NULL)
308 else if ((s->enc_write_ctx =
309 OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
313 * make sure it's intialized in case we exit later with an error
315 EVP_CIPHER_CTX_init(s->enc_write_ctx);
316 dd = s->enc_write_ctx;
318 #ifndef OPENSSL_NO_COMP
319 if (s->compress != NULL) {
320 COMP_CTX_free(s->compress);
324 s->compress = COMP_CTX_new(comp->method);
325 if (s->compress == NULL) {
326 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,
327 SSL_R_COMPRESSION_LIBRARY_ERROR);
333 * this is done by dtls1_reset_seq_numbers for DTLS1_VERSION
335 if (s->version != DTLS1_VERSION)
336 memset(&(s->s3->write_sequence[0]), 0, 8);
337 mac_secret = &(s->s3->write_mac_secret[0]);
341 EVP_CIPHER_CTX_cleanup(dd);
343 p = s->s3->tmp.key_block;
345 cl = EVP_CIPHER_key_length(c);
346 j = is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
347 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
348 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
349 k = EVP_CIPHER_iv_length(c);
350 if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
351 (which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
358 exp_label = (unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
359 exp_label_len = TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
369 exp_label = (unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
370 exp_label_len = TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
374 if (n > s->s3->tmp.key_block_length) {
375 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
379 memcpy(mac_secret, ms, i);
381 printf("which = %04X\nmac key=", which);
384 for (z = 0; z < i; z++)
385 printf("%02X%c", ms[z], ((z + 1) % 16) ? ' ' : '\n');
390 * In here I set both the read and write key/iv to the same value
391 * since only the correct one will be used :-).
394 memcpy(p, exp_label, exp_label_len);
396 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
397 p += SSL3_RANDOM_SIZE;
398 memcpy(p, s->s3->server_random, SSL3_RANDOM_SIZE);
399 p += SSL3_RANDOM_SIZE;
400 tls1_PRF(s->ctx->md5, s->ctx->sha1, buf, (int)(p - buf), key, j,
401 tmp1, tmp2, EVP_CIPHER_key_length(c));
406 memcpy(p, TLS_MD_IV_BLOCK_CONST, TLS_MD_IV_BLOCK_CONST_SIZE);
407 p += TLS_MD_IV_BLOCK_CONST_SIZE;
408 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
409 p += SSL3_RANDOM_SIZE;
410 memcpy(p, s->s3->server_random, SSL3_RANDOM_SIZE);
411 p += SSL3_RANDOM_SIZE;
412 tls1_PRF(s->ctx->md5, s->ctx->sha1, buf, p - buf, empty, 0,
421 s->session->key_arg_length = 0;
425 printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n");
427 for (ki = 0; ki < c->key_len; ki++)
428 printf("%02x", key[ki]);
431 for (ki = 0; ki < c->iv_len; ki++)
432 printf("%02x", iv[ki]);
435 #endif /* KSSL_DEBUG */
437 EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE));
439 printf("which = %04X\nkey=", which);
442 for (z = 0; z < EVP_CIPHER_key_length(c); z++)
443 printf("%02X%c", key[z], ((z + 1) % 16) ? ' ' : '\n');
448 for (z = 0; z < k; z++)
449 printf("%02X%c", iv[z], ((z + 1) % 16) ? ' ' : '\n');
454 OPENSSL_cleanse(tmp1, sizeof(tmp1));
455 OPENSSL_cleanse(tmp2, sizeof(tmp1));
456 OPENSSL_cleanse(iv1, sizeof(iv1));
457 OPENSSL_cleanse(iv2, sizeof(iv2));
460 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_MALLOC_FAILURE);
465 int tls1_setup_key_block(SSL *s)
467 unsigned char *p1, *p2;
474 printf("tls1_setup_key_block()\n");
475 #endif /* KSSL_DEBUG */
477 if (s->s3->tmp.key_block_length != 0)
480 if (!ssl_cipher_get_evp(s->session, &c, &hash, &comp)) {
481 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK, SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
485 s->s3->tmp.new_sym_enc = c;
486 s->s3->tmp.new_hash = hash;
489 EVP_CIPHER_key_length(c) + EVP_MD_size(hash) +
490 EVP_CIPHER_iv_length(c);
493 ssl3_cleanup_key_block(s);
495 if ((p1 = (unsigned char *)OPENSSL_malloc(num)) == NULL)
497 if ((p2 = (unsigned char *)OPENSSL_malloc(num)) == NULL)
500 s->s3->tmp.key_block_length = num;
501 s->s3->tmp.key_block = p1;
504 printf("client random\n");
507 for (z = 0; z < SSL3_RANDOM_SIZE; z++)
508 printf("%02X%c", s->s3->client_random[z],
509 ((z + 1) % 16) ? ' ' : '\n');
511 printf("server random\n");
514 for (z = 0; z < SSL3_RANDOM_SIZE; z++)
515 printf("%02X%c", s->s3->server_random[z],
516 ((z + 1) % 16) ? ' ' : '\n');
518 printf("pre-master\n");
521 for (z = 0; z < s->session->master_key_length; z++)
522 printf("%02X%c", s->session->master_key[z],
523 ((z + 1) % 16) ? ' ' : '\n');
526 tls1_generate_key_block(s, p1, p2, num);
527 OPENSSL_cleanse(p2, num);
530 printf("\nkey block\n");
533 for (z = 0; z < num; z++)
534 printf("%02X%c", p1[z], ((z + 1) % 16) ? ' ' : '\n');
538 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) {
540 * enable vulnerability countermeasure for CBC ciphers with known-IV
541 * problem (http://www.openssl.org/~bodo/tls-cbc.txt)
543 s->s3->need_empty_fragments = 1;
545 if (s->session->cipher != NULL) {
546 if ((s->session->cipher->algorithms & SSL_ENC_MASK) == SSL_eNULL)
547 s->s3->need_empty_fragments = 0;
549 #ifndef OPENSSL_NO_RC4
550 if ((s->session->cipher->algorithms & SSL_ENC_MASK) == SSL_RC4)
551 s->s3->need_empty_fragments = 0;
558 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK, ERR_R_MALLOC_FAILURE);
563 * tls1_enc encrypts/decrypts the record in |s->wrec| / |s->rrec|, respectively.
566 * 0: (in non-constant time) if the record is publically invalid (i.e. too
568 * 1: if the record's padding is valid / the encryption was successful.
569 * -1: if the record's padding/AEAD-authenticator is invalid or, if sending,
570 * an internal error occured.
572 int tls1_enc(SSL *s, int send)
577 int bs, i, j, k, pad = 0, ret, mac_size = 0;
578 const EVP_CIPHER *enc;
581 ds = s->enc_write_ctx;
582 rec = &(s->s3->wrec);
583 if (s->enc_write_ctx == NULL)
586 enc = EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
588 ds = s->enc_read_ctx;
589 rec = &(s->s3->rrec);
590 if (s->enc_read_ctx == NULL)
593 enc = EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
597 printf("tls1_enc(%d)\n", send);
598 #endif /* KSSL_DEBUG */
600 if ((s->session == NULL) || (ds == NULL) || (enc == NULL)) {
601 memmove(rec->data, rec->input, rec->length);
602 rec->input = rec->data;
606 bs = EVP_CIPHER_block_size(ds->cipher);
608 if ((bs != 1) && send) {
609 i = bs - ((int)l % bs);
611 /* Add weird padding of upto 256 bytes */
613 /* we need to add 'i' padding bytes of value j */
615 if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG) {
616 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
619 for (k = (int)l; k < (int)(l + i); k++)
627 printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
628 ds, rec->data, rec->input, l);
630 ("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n",
631 ds->buf_len, ds->cipher->key_len, DES_KEY_SZ,
632 DES_SCHEDULE_SZ, ds->cipher->iv_len);
634 for (i = 0; i < ds->cipher->iv_len; i++)
635 printf("%02X", ds->iv[i]);
637 printf("\trec->input=");
638 for (ui = 0; ui < l; ui++)
639 printf(" %02x", rec->input[ui]);
642 #endif /* KSSL_DEBUG */
645 if (l == 0 || l % bs != 0)
649 EVP_Cipher(ds, rec->data, rec->input, l);
654 printf("\trec->data=");
655 for (ki = 0; ki < l; i++)
656 printf(" %02x", rec->data[ki]);
659 #endif /* KSSL_DEBUG */
662 if (s->read_hash != NULL)
663 mac_size = EVP_MD_size(s->read_hash);
664 if ((bs != 1) && !send)
665 ret = tls1_cbc_remove_padding(s, rec, bs, mac_size);
672 int tls1_cert_verify_mac(SSL *s, EVP_MD_CTX *in_ctx, unsigned char *out)
677 EVP_MD_CTX_init(&ctx);
678 EVP_MD_CTX_copy_ex(&ctx, in_ctx);
679 EVP_DigestFinal_ex(&ctx, out, &ret);
680 EVP_MD_CTX_cleanup(&ctx);
684 int tls1_final_finish_mac(SSL *s, EVP_MD_CTX *in1_ctx, EVP_MD_CTX *in2_ctx,
685 const char *str, int slen, unsigned char *out)
689 unsigned char buf[TLS_MD_MAX_CONST_SIZE + MD5_DIGEST_LENGTH +
691 unsigned char *q, buf2[12];
694 memcpy(q, str, slen);
697 EVP_MD_CTX_init(&ctx);
698 EVP_MD_CTX_copy_ex(&ctx, in1_ctx);
699 EVP_DigestFinal_ex(&ctx, q, &i);
701 EVP_MD_CTX_copy_ex(&ctx, in2_ctx);
702 EVP_DigestFinal_ex(&ctx, q, &i);
705 tls1_PRF(s->ctx->md5, s->ctx->sha1, buf, (int)(q - buf),
706 s->session->master_key, s->session->master_key_length,
707 out, buf2, sizeof buf2);
708 EVP_MD_CTX_cleanup(&ctx);
710 OPENSSL_cleanse(buf, (int)(q - buf));
711 OPENSSL_cleanse(buf2, sizeof(buf2));
715 int tls1_mac(SSL *ssl, unsigned char *md, int send)
718 unsigned char *mac_sec, *seq;
720 size_t md_size, orig_len;
723 unsigned char header[13];
726 rec = &(ssl->s3->wrec);
727 mac_sec = &(ssl->s3->write_mac_secret[0]);
728 seq = &(ssl->s3->write_sequence[0]);
729 hash = ssl->write_hash;
731 rec = &(ssl->s3->rrec);
732 mac_sec = &(ssl->s3->read_mac_secret[0]);
733 seq = &(ssl->s3->read_sequence[0]);
734 hash = ssl->read_hash;
737 md_size = EVP_MD_size(hash);
739 /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
740 HMAC_CTX_init(&hmac);
741 HMAC_Init_ex(&hmac, mac_sec, EVP_MD_size(hash), hash, NULL);
743 if (ssl->version == DTLS1_BAD_VER ||
744 (ssl->version == DTLS1_VERSION
745 && ssl->client_version != DTLS1_BAD_VER)) {
746 unsigned char dtlsseq[8], *p = dtlsseq;
747 s2n(send ? ssl->d1->w_epoch : ssl->d1->r_epoch, p);
748 memcpy(p, &seq[2], 6);
750 memcpy(header, dtlsseq, 8);
752 memcpy(header, seq, 8);
755 * kludge: tls1_cbc_remove_padding passes padding length in rec->type
757 orig_len = rec->length + md_size + ((unsigned int)rec->type >> 8);
760 header[8] = rec->type;
761 header[9] = (unsigned char)(ssl->version >> 8);
762 header[10] = (unsigned char)(ssl->version);
763 header[11] = (rec->length) >> 8;
764 header[12] = (rec->length) & 0xff;
767 EVP_CIPHER_CTX_mode(ssl->enc_read_ctx) == EVP_CIPH_CBC_MODE &&
768 ssl3_cbc_record_digest_supported(hash)) {
770 * This is a CBC-encrypted record. We must avoid leaking any
771 * timing-side channel information about how many blocks of data we
772 * are hashing because that gives an attacker a timing-oracle.
774 /* Final param == not SSLv3 */
775 ssl3_cbc_digest_record(hash,
778 rec->length + md_size, orig_len,
779 ssl->s3->read_mac_secret,
780 EVP_MD_size(ssl->read_hash),
786 HMAC_Update(&hmac, header, sizeof(header));
787 HMAC_Update(&hmac, rec->input, rec->length);
788 HMAC_Final(&hmac, md, &mds);
791 if (!send && FIPS_mode())
792 tls_fips_digest_extra(ssl->enc_read_ctx,
794 &hmac, rec->input, rec->length, orig_len);
798 HMAC_CTX_cleanup(&hmac);
803 for (z = 0; z < 8; z++)
804 printf("%02X ", seq[z]);
810 for (z = 0; z < rec->length; z++)
811 printf("%02X ", rec->data[z]);
816 if (SSL_version(ssl) != DTLS1_VERSION
817 && SSL_version(ssl) != DTLS1_BAD_VER) {
818 for (i = 7; i >= 0; i--) {
827 for (z = 0; z < md_size; z++)
828 printf("%02X ", md[z]);
835 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
838 unsigned char buf[SSL3_RANDOM_SIZE * 2 + TLS_MD_MASTER_SECRET_CONST_SIZE];
839 unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
842 printf("tls1_generate_master_secret(%p,%p, %p, %d)\n", (void *)s, out, p,
844 #endif /* KSSL_DEBUG */
846 /* Setup the stuff to munge */
847 memcpy(buf, TLS_MD_MASTER_SECRET_CONST, TLS_MD_MASTER_SECRET_CONST_SIZE);
848 memcpy(&(buf[TLS_MD_MASTER_SECRET_CONST_SIZE]),
849 s->s3->client_random, SSL3_RANDOM_SIZE);
850 memcpy(&(buf[SSL3_RANDOM_SIZE + TLS_MD_MASTER_SECRET_CONST_SIZE]),
851 s->s3->server_random, SSL3_RANDOM_SIZE);
852 tls1_PRF(s->ctx->md5, s->ctx->sha1,
853 buf, TLS_MD_MASTER_SECRET_CONST_SIZE + SSL3_RANDOM_SIZE * 2, p,
854 len, s->session->master_key, buff, sizeof buff);
855 OPENSSL_cleanse(buf, sizeof buf);
856 OPENSSL_cleanse(buff, sizeof buff);
858 printf("tls1_generate_master_secret() complete\n");
859 #endif /* KSSL_DEBUG */
860 return (SSL3_MASTER_SECRET_SIZE);
863 int tls1_alert_code(int code)
866 case SSL_AD_CLOSE_NOTIFY:
867 return (SSL3_AD_CLOSE_NOTIFY);
868 case SSL_AD_UNEXPECTED_MESSAGE:
869 return (SSL3_AD_UNEXPECTED_MESSAGE);
870 case SSL_AD_BAD_RECORD_MAC:
871 return (SSL3_AD_BAD_RECORD_MAC);
872 case SSL_AD_DECRYPTION_FAILED:
873 return (TLS1_AD_DECRYPTION_FAILED);
874 case SSL_AD_RECORD_OVERFLOW:
875 return (TLS1_AD_RECORD_OVERFLOW);
876 case SSL_AD_DECOMPRESSION_FAILURE:
877 return (SSL3_AD_DECOMPRESSION_FAILURE);
878 case SSL_AD_HANDSHAKE_FAILURE:
879 return (SSL3_AD_HANDSHAKE_FAILURE);
880 case SSL_AD_NO_CERTIFICATE:
882 case SSL_AD_BAD_CERTIFICATE:
883 return (SSL3_AD_BAD_CERTIFICATE);
884 case SSL_AD_UNSUPPORTED_CERTIFICATE:
885 return (SSL3_AD_UNSUPPORTED_CERTIFICATE);
886 case SSL_AD_CERTIFICATE_REVOKED:
887 return (SSL3_AD_CERTIFICATE_REVOKED);
888 case SSL_AD_CERTIFICATE_EXPIRED:
889 return (SSL3_AD_CERTIFICATE_EXPIRED);
890 case SSL_AD_CERTIFICATE_UNKNOWN:
891 return (SSL3_AD_CERTIFICATE_UNKNOWN);
892 case SSL_AD_ILLEGAL_PARAMETER:
893 return (SSL3_AD_ILLEGAL_PARAMETER);
894 case SSL_AD_UNKNOWN_CA:
895 return (TLS1_AD_UNKNOWN_CA);
896 case SSL_AD_ACCESS_DENIED:
897 return (TLS1_AD_ACCESS_DENIED);
898 case SSL_AD_DECODE_ERROR:
899 return (TLS1_AD_DECODE_ERROR);
900 case SSL_AD_DECRYPT_ERROR:
901 return (TLS1_AD_DECRYPT_ERROR);
902 case SSL_AD_EXPORT_RESTRICTION:
903 return (TLS1_AD_EXPORT_RESTRICTION);
904 case SSL_AD_PROTOCOL_VERSION:
905 return (TLS1_AD_PROTOCOL_VERSION);
906 case SSL_AD_INSUFFICIENT_SECURITY:
907 return (TLS1_AD_INSUFFICIENT_SECURITY);
908 case SSL_AD_INTERNAL_ERROR:
909 return (TLS1_AD_INTERNAL_ERROR);
910 case SSL_AD_USER_CANCELLED:
911 return (TLS1_AD_USER_CANCELLED);
912 case SSL_AD_NO_RENEGOTIATION:
913 return (TLS1_AD_NO_RENEGOTIATION);
914 case SSL_AD_UNSUPPORTED_EXTENSION:
915 return (TLS1_AD_UNSUPPORTED_EXTENSION);
916 case SSL_AD_CERTIFICATE_UNOBTAINABLE:
917 return (TLS1_AD_CERTIFICATE_UNOBTAINABLE);
918 case SSL_AD_UNRECOGNIZED_NAME:
919 return (TLS1_AD_UNRECOGNIZED_NAME);
920 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
921 return (TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
922 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
923 return (TLS1_AD_BAD_CERTIFICATE_HASH_VALUE);
924 case SSL_AD_UNKNOWN_PSK_IDENTITY:
925 return (TLS1_AD_UNKNOWN_PSK_IDENTITY);
926 case SSL_AD_INAPPROPRIATE_FALLBACK:
927 return (TLS1_AD_INAPPROPRIATE_FALLBACK);
928 #ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
929 case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE:
930 return (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);