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))
198 /* Reinit mac contexts */
199 if (!EVP_DigestSignInit(&ctx,NULL,md, NULL, mac_key))
201 if (!EVP_DigestSignInit(&ctx_tmp,NULL,md, NULL, mac_key))
203 if (!EVP_DigestSignUpdate(&ctx,A1,A1_len))
205 if (!EVP_DigestSignUpdate(&ctx_tmp,A1,A1_len))
207 if (seed1 && !EVP_DigestSignUpdate(&ctx,seed1,seed1_len))
209 if (seed2 && !EVP_DigestSignUpdate(&ctx,seed2,seed2_len))
211 if (seed3 && !EVP_DigestSignUpdate(&ctx,seed3,seed3_len))
213 if (seed4 && !EVP_DigestSignUpdate(&ctx,seed4,seed4_len))
215 if (seed5 && !EVP_DigestSignUpdate(&ctx,seed5,seed5_len))
220 if (!EVP_DigestSignFinal(&ctx,out,&j))
224 /* calc the next A1 value */
225 if (!EVP_DigestSignFinal(&ctx_tmp,A1,&A1_len))
230 if (!EVP_DigestSignFinal(&ctx,A1,&A1_len))
238 EVP_PKEY_free(mac_key);
239 EVP_MD_CTX_cleanup(&ctx);
240 EVP_MD_CTX_cleanup(&ctx_tmp);
241 OPENSSL_cleanse(A1,sizeof(A1));
245 /* seed1 through seed5 are virtually concatenated */
246 static int tls1_PRF(long digest_mask,
247 const void *seed1, int seed1_len,
248 const void *seed2, int seed2_len,
249 const void *seed3, int seed3_len,
250 const void *seed4, int seed4_len,
251 const void *seed5, int seed5_len,
252 const unsigned char *sec, int slen,
254 unsigned char *out2, int olen)
257 const unsigned char *S1;
262 /* Count number of digests and partition sec evenly */
264 for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
265 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) count++;
272 for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
273 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) {
275 SSLerr(SSL_F_TLS1_PRF,
276 SSL_R_UNSUPPORTED_DIGEST_TYPE);
279 if (!tls1_P_hash(md ,S1,len+(slen&1),
280 seed1,seed1_len,seed2,seed2_len,seed3,seed3_len,seed4,seed4_len,seed5,seed5_len,
284 for (i=0; i<olen; i++)
294 static int tls1_generate_key_block(SSL *s, unsigned char *km,
295 unsigned char *tmp, int num)
298 ret = tls1_PRF(ssl_get_algorithm2(s),
299 TLS_MD_KEY_EXPANSION_CONST,TLS_MD_KEY_EXPANSION_CONST_SIZE,
300 s->s3->server_random,SSL3_RANDOM_SIZE,
301 s->s3->client_random,SSL3_RANDOM_SIZE,
303 s->session->master_key,s->session->master_key_length,
306 printf("tls1_generate_key_block() ==> %d byte master_key =\n\t",
307 s->session->master_key_length);
310 for (i=0; i < s->session->master_key_length; i++)
312 printf("%02X", s->session->master_key[i]);
315 #endif /* KSSL_DEBUG */
319 /* tls1_aead_ctx_init allocates |*aead_ctx|, if needed and returns 1. It
320 * returns 0 on malloc error. */
321 static int tls1_aead_ctx_init(SSL_AEAD_CTX **aead_ctx)
323 if (*aead_ctx != NULL)
324 EVP_AEAD_CTX_cleanup(&(*aead_ctx)->ctx);
327 *aead_ctx = (SSL_AEAD_CTX*) OPENSSL_malloc(sizeof(SSL_AEAD_CTX));
328 if (*aead_ctx == NULL)
330 SSLerr(SSL_F_TLS1_AEAD_CTX_INIT, ERR_R_MALLOC_FAILURE);
338 static int tls1_change_cipher_state_aead(SSL *s, char is_read,
339 const unsigned char *key, unsigned key_len,
340 const unsigned char *iv, unsigned iv_len)
342 const EVP_AEAD *aead = s->s3->tmp.new_aead;
343 SSL_AEAD_CTX *aead_ctx;
347 if (!tls1_aead_ctx_init(&s->aead_read_ctx))
349 aead_ctx = s->aead_read_ctx;
353 if (!tls1_aead_ctx_init(&s->aead_write_ctx))
355 aead_ctx = s->aead_write_ctx;
358 if (!EVP_AEAD_CTX_init(&aead_ctx->ctx, aead, key, key_len,
359 EVP_AEAD_DEFAULT_TAG_LENGTH, NULL /* engine */))
361 if (iv_len > sizeof(aead_ctx->fixed_nonce))
363 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE_AEAD, ERR_R_INTERNAL_ERROR);
366 memcpy(aead_ctx->fixed_nonce, iv, iv_len);
367 aead_ctx->fixed_nonce_len = iv_len;
368 aead_ctx->variable_nonce_len = 8; /* always the case, currently. */
369 aead_ctx->variable_nonce_included_in_record =
370 (s->s3->tmp.new_cipher->algorithm2 & SSL_CIPHER_ALGORITHM2_VARIABLE_NONCE_INCLUDED_IN_RECORD) != 0;
371 if (aead_ctx->variable_nonce_len + aead_ctx->fixed_nonce_len != EVP_AEAD_nonce_length(aead))
373 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE_AEAD, ERR_R_INTERNAL_ERROR);
376 aead_ctx->tag_len = EVP_AEAD_max_overhead(aead);
381 /* tls1_change_cipher_state_cipher performs the work needed to switch cipher
382 * states when using EVP_CIPHER. The argument |is_read| is true iff this
383 * function is being called due to reading, as opposed to writing, a
384 * ChangeCipherSpec message. In order to support export ciphersuites,
385 * use_client_keys indicates whether the key material provided is in the
386 * "client write" direction. */
387 static int tls1_change_cipher_state_cipher(SSL *s,
388 char is_read, char use_client_keys,
389 const unsigned char *mac_secret, unsigned mac_secret_len,
390 const unsigned char *key, unsigned key_len,
391 const unsigned char *iv, unsigned iv_len)
393 const EVP_CIPHER *cipher = s->s3->tmp.new_sym_enc;
394 const char is_export = SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) != 0;
395 EVP_CIPHER_CTX *cipher_ctx;
399 unsigned char export_tmp1[EVP_MAX_KEY_LENGTH];
400 unsigned char export_tmp2[EVP_MAX_KEY_LENGTH];
401 unsigned char export_iv1[EVP_MAX_IV_LENGTH * 2];
402 unsigned char export_iv2[EVP_MAX_IV_LENGTH * 2];
406 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
407 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
409 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
411 if (s->enc_read_ctx != NULL)
412 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
413 else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
416 /* make sure it's intialized in case we exit later with an error */
417 EVP_CIPHER_CTX_init(s->enc_read_ctx);
419 cipher_ctx = s->enc_read_ctx;
420 mac_ctx = ssl_replace_hash(&s->read_hash, NULL);
422 memcpy(s->s3->read_mac_secret, mac_secret, mac_secret_len);
423 s->s3->read_mac_secret_size = mac_secret_len;
427 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
428 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
430 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
432 if (s->enc_write_ctx != NULL)
433 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
434 else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
437 /* make sure it's intialized in case we exit later with an error */
438 EVP_CIPHER_CTX_init(s->enc_write_ctx);
440 cipher_ctx = s->enc_write_ctx;
441 mac_ctx = ssl_replace_hash(&s->write_hash, NULL);
443 memcpy(s->s3->write_mac_secret, mac_secret, mac_secret_len);
444 s->s3->write_mac_secret_size = mac_secret_len;
449 /* In here I set both the read and write key/iv to the
450 * same value since only the correct one will be used :-).
452 const unsigned char *label;
457 label = (const unsigned char*) TLS_MD_CLIENT_WRITE_KEY_CONST;
458 label_len = TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
462 label = (const unsigned char*) TLS_MD_SERVER_WRITE_KEY_CONST;
463 label_len = TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
466 if (!tls1_PRF(ssl_get_algorithm2(s),
468 s->s3->client_random, SSL3_RANDOM_SIZE,
469 s->s3->server_random, SSL3_RANDOM_SIZE,
471 key /* secret */, key_len /* secret length */,
472 export_tmp1 /* output */,
473 export_tmp2 /* scratch space */,
474 EVP_CIPHER_key_length(s->s3->tmp.new_sym_enc) /* output length */))
480 static const unsigned char empty[] = "";
482 if (!tls1_PRF(ssl_get_algorithm2(s),
483 TLS_MD_IV_BLOCK_CONST, TLS_MD_IV_BLOCK_CONST_SIZE,
484 s->s3->client_random, SSL3_RANDOM_SIZE,
485 s->s3->server_random, SSL3_RANDOM_SIZE,
487 empty /* secret */ ,0 /* secret length */,
488 export_iv1 /* output */,
489 export_iv2 /* scratch space */,
490 iv_len * 2 /* output length */))
496 iv = &export_iv1[iv_len];
500 /* is_aead_cipher indicates whether the EVP_CIPHER implements an AEAD
501 * interface. This is different from the newer EVP_AEAD interface. */
502 is_aead_cipher = (EVP_CIPHER_flags(cipher) & EVP_CIPH_FLAG_AEAD_CIPHER) != 0;
507 EVP_PKEY_new_mac_key(s->s3->tmp.new_mac_pkey_type,
508 NULL, mac_secret, mac_secret_len);
511 EVP_DigestSignInit(mac_ctx, NULL, s->s3->tmp.new_hash, NULL, mac_key);
512 EVP_PKEY_free(mac_key);
515 if (EVP_CIPHER_mode(cipher) == EVP_CIPH_GCM_MODE)
517 EVP_CipherInit_ex(cipher_ctx, cipher, NULL /* engine */, key,
518 NULL /* iv */, !is_read);
519 EVP_CIPHER_CTX_ctrl(cipher_ctx, EVP_CTRL_GCM_SET_IV_FIXED, iv_len, (void*) iv);
522 EVP_CipherInit_ex(cipher_ctx, cipher, NULL /* engine */, key, iv, !is_read);
524 /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
525 if (is_aead_cipher && mac_secret_len > 0)
526 EVP_CIPHER_CTX_ctrl(cipher_ctx, EVP_CTRL_AEAD_SET_MAC_KEY,
527 mac_secret_len, (void*) mac_secret);
531 OPENSSL_cleanse(export_tmp1, sizeof(export_tmp1));
532 OPENSSL_cleanse(export_tmp2, sizeof(export_tmp1));
533 OPENSSL_cleanse(export_iv1, sizeof(export_iv1));
534 OPENSSL_cleanse(export_iv2, sizeof(export_iv2));
540 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE_CIPHER, ERR_R_MALLOC_FAILURE);
544 int tls1_change_cipher_state(SSL *s, int which)
546 /* is_read is true if we have just read a ChangeCipherSpec message -
547 * i.e. we need to update the read cipherspec. Otherwise we have just
549 const char is_read = (which & SSL3_CC_READ) != 0;
550 /* use_client_keys is true if we wish to use the keys for the "client
551 * write" direction. This is the case if we're a client sending a
552 * ChangeCipherSpec, or a server reading a client's ChangeCipherSpec. */
553 const char use_client_keys = which == SSL3_CHANGE_CIPHER_CLIENT_WRITE ||
554 which == SSL3_CHANGE_CIPHER_SERVER_READ;
555 const unsigned char *client_write_mac_secret, *server_write_mac_secret, *mac_secret;
556 const unsigned char *client_write_key, *server_write_key, *key;
557 const unsigned char *client_write_iv, *server_write_iv, *iv;
558 const EVP_CIPHER *cipher = s->s3->tmp.new_sym_enc;
559 const EVP_AEAD *aead = s->s3->tmp.new_aead;
560 unsigned key_len, iv_len, mac_secret_len;
561 const unsigned char *key_data;
562 const char is_export = SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) != 0;
564 /* Update compression contexts. */
565 #ifndef OPENSSL_NO_COMP
566 const SSL_COMP *comp = s->s3->tmp.new_compression;
570 if (s->expand != NULL)
572 COMP_CTX_free(s->expand);
577 s->expand=COMP_CTX_new(comp->method);
578 if (s->expand == NULL)
580 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
583 if (s->s3->rrec.comp == NULL)
585 (unsigned char *)OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
586 if (s->s3->rrec.comp == NULL)
592 if (s->compress != NULL)
594 COMP_CTX_free(s->compress);
599 s->compress = COMP_CTX_new(comp->method);
600 if (s->compress == NULL)
602 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
607 #endif /* OPENSSL_NO_COMP */
609 /* Reset sequence number to zero. */
610 memset(is_read ? s->s3->read_sequence : s->s3->write_sequence, 0, 8);
612 /* key_arg is used for SSLv2. We don't need it for TLS. */
613 s->session->key_arg_length = 0;
615 mac_secret_len = s->s3->tmp.new_mac_secret_size;
619 key_len = EVP_AEAD_key_length(aead);
620 iv_len = SSL_CIPHER_AEAD_FIXED_NONCE_LEN(s->s3->tmp.new_cipher);
624 key_len = EVP_CIPHER_key_length(cipher);
625 if (is_export && key_len > SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher))
626 key_len = SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher);
628 if (EVP_CIPHER_mode(cipher) == EVP_CIPH_GCM_MODE)
629 iv_len = EVP_GCM_TLS_FIXED_IV_LEN;
631 iv_len = EVP_CIPHER_iv_length(cipher);
634 key_data = s->s3->tmp.key_block;
635 client_write_mac_secret = key_data; key_data += mac_secret_len;
636 server_write_mac_secret = key_data; key_data += mac_secret_len;
637 client_write_key = key_data; key_data += key_len;
638 server_write_key = key_data; key_data += key_len;
639 client_write_iv = key_data; key_data += iv_len;
640 server_write_iv = key_data; key_data += iv_len;
644 mac_secret = client_write_mac_secret;
645 key = client_write_key;
646 iv = client_write_iv;
650 mac_secret = server_write_mac_secret;
651 key = server_write_key;
652 iv = server_write_iv;
655 if (key_data - s->s3->tmp.key_block != s->s3->tmp.key_block_length)
657 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
663 if (!tls1_change_cipher_state_aead(s, is_read,
664 key, key_len, iv, iv_len))
669 if (!tls1_change_cipher_state_cipher(s, is_read, use_client_keys,
670 mac_secret, mac_secret_len,
676 #ifdef OPENSSL_SSL_TRACE_CRYPTO
679 int wh = which & SSL3_CC_WRITE ? TLS1_RT_CRYPTO_WRITE : 0;
681 s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_MAC,
682 mac_secret, mac_secret_len,
683 s, s->msg_callback_arg);
685 s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_KEY,
687 s, s->msg_callback_arg);
690 if (EVP_CIPHER_mode(cipher) == EVP_CIPH_GCM_MODE)
691 wh |= TLS1_RT_CRYPTO_FIXED_IV;
693 wh |= TLS1_RT_CRYPTO_IV;
694 s->msg_callback(2, s->version, wh, iv, iv_len,
695 s, s->msg_callback_arg);
702 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_MALLOC_FAILURE);
706 int tls1_setup_key_block(SSL *s)
708 unsigned char *p1,*p2=NULL;
709 const EVP_CIPHER *c = NULL;
710 const EVP_MD *hash = NULL;
711 const EVP_AEAD *aead = NULL;
714 int mac_type= NID_undef,mac_secret_size=0;
716 unsigned key_len, iv_len;
719 printf ("tls1_setup_key_block()\n");
720 #endif /* KSSL_DEBUG */
722 if (s->s3->tmp.key_block_length != 0)
725 if (!ssl_cipher_get_comp(s->session, &comp))
726 goto cipher_unavailable_err;
728 if (s->session->cipher &&
729 (s->session->cipher->algorithm2 & SSL_CIPHER_ALGORITHM2_AEAD))
731 if (!ssl_cipher_get_evp_aead(s->session, &aead))
732 goto cipher_unavailable_err;
733 key_len = EVP_AEAD_key_length(aead);
734 iv_len = SSL_CIPHER_AEAD_FIXED_NONCE_LEN(s->session->cipher);
738 if (!ssl_cipher_get_evp(s->session,&c,&hash,&mac_type,&mac_secret_size))
739 goto cipher_unavailable_err;
740 key_len = EVP_CIPHER_key_length(c);
742 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
743 iv_len = EVP_GCM_TLS_FIXED_IV_LEN;
745 iv_len = EVP_CIPHER_iv_length(c);
748 s->s3->tmp.new_aead=aead;
749 s->s3->tmp.new_sym_enc=c;
750 s->s3->tmp.new_hash=hash;
751 s->s3->tmp.new_mac_pkey_type = mac_type;
752 s->s3->tmp.new_mac_secret_size = mac_secret_size;
754 num=key_len+mac_secret_size+iv_len;
757 ssl3_cleanup_key_block(s);
759 if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL)
761 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
765 s->s3->tmp.key_block_length=num;
766 s->s3->tmp.key_block=p1;
768 if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL)
770 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
775 printf("client random\n");
776 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
777 printf("server random\n");
778 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
779 printf("pre-master\n");
780 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
782 if (!tls1_generate_key_block(s,p1,p2,num))
785 printf("\nkey block\n");
786 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
789 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)
790 && s->method->version <= TLS1_VERSION)
792 /* enable vulnerability countermeasure for CBC ciphers with
793 * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
795 s->s3->need_empty_fragments = 1;
797 if (s->session->cipher != NULL)
799 if (s->session->cipher->algorithm_enc == SSL_eNULL)
800 s->s3->need_empty_fragments = 0;
802 #ifndef OPENSSL_NO_RC4
803 if (s->session->cipher->algorithm_enc == SSL_RC4)
804 s->s3->need_empty_fragments = 0;
813 OPENSSL_cleanse(p2,num);
818 cipher_unavailable_err:
819 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
823 /* tls1_enc encrypts/decrypts the record in |s->wrec| / |s->rrec|, respectively.
826 * 0: (in non-constant time) if the record is publically invalid (i.e. too
828 * 1: if the record's padding is valid / the encryption was successful.
829 * -1: if the record's padding/AEAD-authenticator is invalid or, if sending,
830 * an internal error occured.
832 int tls1_enc(SSL *s, int send)
837 int bs,i,j,k,pad=0,ret,mac_size=0;
838 const EVP_CIPHER *enc;
839 const SSL_AEAD_CTX *aead;
847 aead = s->aead_write_ctx;
849 aead = s->aead_read_ctx;
853 unsigned char ad[13], *seq, *in, *out, nonce[16];
857 seq = send ? s->s3->write_sequence : s->s3->read_sequence;
859 if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER)
861 unsigned char dtlsseq[9], *p = dtlsseq;
863 s2n(send ? s->d1->w_epoch : s->d1->r_epoch, p);
864 memcpy(p, &seq[2], 6);
865 memcpy(ad, dtlsseq, 8);
870 for (i=7; i>=0; i--) /* increment */
879 ad[9] = (unsigned char)(s->version>>8);
880 ad[10] = (unsigned char)(s->version);
882 if (aead->fixed_nonce_len + aead->variable_nonce_len > sizeof(nonce) ||
883 aead->variable_nonce_len > 8)
884 return -1; /* internal error - should never happen. */
886 memcpy(nonce, aead->fixed_nonce, aead->fixed_nonce_len);
887 nonce_used = aead->fixed_nonce_len;
891 size_t len = rec->length;
896 /* When sending we use the sequence number as the
897 * variable part of the nonce. */
898 if (aead->variable_nonce_len > 8)
900 memcpy(nonce + nonce_used, ad, aead->variable_nonce_len);
901 nonce_used += aead->variable_nonce_len;
903 /* in do_ssl3_write, rec->input is moved forward by
904 * variable_nonce_len in order to leave space for the
905 * variable nonce. Thus we can copy the sequence number
906 * bytes into place without overwriting any of the
908 if (aead->variable_nonce_included_in_record)
910 memcpy(out, ad, aead->variable_nonce_len);
911 len -= aead->variable_nonce_len;
912 eivlen = aead->variable_nonce_len;
918 n = EVP_AEAD_CTX_seal(&aead->ctx,
919 out + eivlen, len + aead->tag_len,
923 if (n >= 0 && aead->variable_nonce_included_in_record)
924 n += aead->variable_nonce_len;
929 size_t len = rec->length;
931 if (rec->data != rec->input)
932 return -1; /* internal error - should never happen. */
933 out = in = rec->input;
935 if (len < aead->variable_nonce_len)
937 memcpy(nonce + nonce_used,
938 aead->variable_nonce_included_in_record ? in : ad,
939 aead->variable_nonce_len);
940 nonce_used += aead->variable_nonce_len;
942 if (aead->variable_nonce_included_in_record)
944 in += aead->variable_nonce_len;
945 len -= aead->variable_nonce_len;
946 out += aead->variable_nonce_len;
949 if (len < aead->tag_len)
951 len -= aead->tag_len;
956 n = EVP_AEAD_CTX_open(&aead->ctx, out, len, nonce, nonce_used,
957 in, len + aead->tag_len, ad, sizeof(ad));
959 rec->data = rec->input = out;
970 if (EVP_MD_CTX_md(s->write_hash))
972 int n=EVP_MD_CTX_size(s->write_hash);
973 OPENSSL_assert(n >= 0);
977 if (s->enc_write_ctx == NULL)
982 enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
983 /* For TLSv1.1 and later explicit IV */
984 if (SSL_USE_EXPLICIT_IV(s)
985 && EVP_CIPHER_mode(enc) == EVP_CIPH_CBC_MODE)
986 ivlen = EVP_CIPHER_iv_length(enc);
991 if ( rec->data != rec->input)
992 /* we can't write into the input stream:
993 * Can this ever happen?? (steve)
996 "%s:%d: rec->data != rec->input\n",
998 else if (RAND_bytes(rec->input, ivlen) <= 0)
1005 if (EVP_MD_CTX_md(s->read_hash))
1007 int n=EVP_MD_CTX_size(s->read_hash);
1008 OPENSSL_assert(n >= 0);
1011 rec= &(s->s3->rrec);
1012 if (s->enc_read_ctx == NULL)
1015 enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
1019 printf("tls1_enc(%d)\n", send);
1020 #endif /* KSSL_DEBUG */
1022 if ((s->session == NULL) || (ds == NULL) || (enc == NULL))
1024 memmove(rec->data,rec->input,rec->length);
1025 rec->input=rec->data;
1031 bs=EVP_CIPHER_block_size(ds->cipher);
1033 if (EVP_CIPHER_flags(ds->cipher)&EVP_CIPH_FLAG_AEAD_CIPHER)
1035 unsigned char buf[13],*seq;
1037 seq = send?s->s3->write_sequence:s->s3->read_sequence;
1041 unsigned char dtlsseq[9],*p=dtlsseq;
1043 s2n(send?s->d1->w_epoch:s->d1->r_epoch,p);
1044 memcpy(p,&seq[2],6);
1045 memcpy(buf,dtlsseq,8);
1050 for (i=7; i>=0; i--) /* increment */
1053 if (seq[i] != 0) break;
1058 buf[9]=(unsigned char)(s->version>>8);
1059 buf[10]=(unsigned char)(s->version);
1060 buf[11]=rec->length>>8;
1061 buf[12]=rec->length&0xff;
1062 pad=EVP_CIPHER_CTX_ctrl(ds,EVP_CTRL_AEAD_TLS1_AAD,13,buf);
1069 else if ((bs != 1) && send)
1073 /* Add weird padding of upto 256 bytes */
1075 /* we need to add 'i' padding bytes of value j */
1077 if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
1079 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
1082 for (k=(int)l; k<(int)(l+i); k++)
1091 printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
1092 ds,rec->data,rec->input,l);
1093 printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n",
1094 ds->buf_len, ds->cipher->key_len,
1095 DES_KEY_SZ, DES_SCHEDULE_SZ,
1096 ds->cipher->iv_len);
1098 for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]);
1100 printf("\trec->input=");
1101 for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]);
1104 #endif /* KSSL_DEBUG */
1108 if (l == 0 || l%bs != 0)
1112 i = EVP_Cipher(ds,rec->data,rec->input,l);
1113 if ((EVP_CIPHER_flags(ds->cipher)&EVP_CIPH_FLAG_CUSTOM_CIPHER)
1116 return -1; /* AEAD can fail to verify MAC */
1117 if (EVP_CIPHER_mode(enc) == EVP_CIPH_GCM_MODE && !send)
1119 rec->data += EVP_GCM_TLS_EXPLICIT_IV_LEN;
1120 rec->input += EVP_GCM_TLS_EXPLICIT_IV_LEN;
1121 rec->length -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
1127 printf("\trec->data=");
1129 printf(" %02x", rec->data[i]); printf("\n");
1131 #endif /* KSSL_DEBUG */
1134 if (EVP_MD_CTX_md(s->read_hash) != NULL)
1135 mac_size = EVP_MD_CTX_size(s->read_hash);
1136 if ((bs != 1) && !send)
1137 ret = tls1_cbc_remove_padding(s, rec, bs, mac_size);
1144 int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out)
1147 EVP_MD_CTX ctx, *d=NULL;
1150 if (s->s3->handshake_buffer)
1151 if (!ssl3_digest_cached_records(s))
1154 for (i=0;i<SSL_MAX_DIGEST;i++)
1156 if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid)
1158 d=s->s3->handshake_dgst[i];
1163 SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC,SSL_R_NO_REQUIRED_DIGEST);
1167 EVP_MD_CTX_init(&ctx);
1168 EVP_MD_CTX_copy_ex(&ctx,d);
1169 EVP_DigestFinal_ex(&ctx,out,&ret);
1170 EVP_MD_CTX_cleanup(&ctx);
1174 int tls1_final_finish_mac(SSL *s,
1175 const char *str, int slen, unsigned char *out)
1179 unsigned char buf[2*EVP_MAX_MD_SIZE];
1180 unsigned char *q,buf2[12];
1188 if (s->s3->handshake_buffer)
1189 if (!ssl3_digest_cached_records(s))
1192 EVP_MD_CTX_init(&ctx);
1194 for (idx=0;ssl_get_handshake_digest(idx,&mask,&md);idx++)
1196 if (mask & ssl_get_algorithm2(s))
1198 int hashsize = EVP_MD_size(md);
1199 if (hashsize < 0 || hashsize > (int)(sizeof buf - (size_t)(q-buf)))
1201 /* internal error: 'buf' is too small for this cipersuite! */
1206 EVP_MD_CTX_copy_ex(&ctx,s->s3->handshake_dgst[idx]);
1207 EVP_DigestFinal_ex(&ctx,q,&i);
1208 if (i != (unsigned int)hashsize) /* can't really happen */
1215 if (!tls1_PRF(ssl_get_algorithm2(s),
1216 str,slen, buf,(int)(q-buf), NULL,0, NULL,0, NULL,0,
1217 s->session->master_key,s->session->master_key_length,
1218 out,buf2,sizeof buf2))
1220 EVP_MD_CTX_cleanup(&ctx);
1228 int tls1_mac(SSL *ssl, unsigned char *md, int send)
1233 size_t md_size, orig_len;
1235 EVP_MD_CTX hmac, *mac_ctx;
1236 unsigned char header[13];
1237 int stream_mac = (send?(ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM):(ssl->mac_flags&SSL_MAC_FLAG_READ_MAC_STREAM));
1242 rec= &(ssl->s3->wrec);
1243 seq= &(ssl->s3->write_sequence[0]);
1244 hash=ssl->write_hash;
1248 rec= &(ssl->s3->rrec);
1249 seq= &(ssl->s3->read_sequence[0]);
1250 hash=ssl->read_hash;
1253 t=EVP_MD_CTX_size(hash);
1254 OPENSSL_assert(t >= 0);
1257 /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
1264 EVP_MD_CTX_copy(&hmac,hash);
1268 if (SSL_IS_DTLS(ssl))
1270 unsigned char dtlsseq[8],*p=dtlsseq;
1272 s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p);
1273 memcpy (p,&seq[2],6);
1275 memcpy(header, dtlsseq, 8);
1278 memcpy(header, seq, 8);
1280 /* kludge: tls1_cbc_remove_padding passes padding length in rec->type */
1281 orig_len = rec->length+md_size+((unsigned int)rec->type>>8);
1284 header[8]=rec->type;
1285 header[9]=(unsigned char)(ssl->version>>8);
1286 header[10]=(unsigned char)(ssl->version);
1287 header[11]=(rec->length)>>8;
1288 header[12]=(rec->length)&0xff;
1291 EVP_CIPHER_CTX_mode(ssl->enc_read_ctx) == EVP_CIPH_CBC_MODE &&
1292 ssl3_cbc_record_digest_supported(mac_ctx))
1294 /* This is a CBC-encrypted record. We must avoid leaking any
1295 * timing-side channel information about how many blocks of
1296 * data we are hashing because that gives an attacker a
1298 ssl3_cbc_digest_record(
1302 rec->length + md_size, orig_len,
1303 ssl->s3->read_mac_secret,
1304 ssl->s3->read_mac_secret_size,
1309 EVP_DigestSignUpdate(mac_ctx,header,sizeof(header));
1310 EVP_DigestSignUpdate(mac_ctx,rec->input,rec->length);
1311 t=EVP_DigestSignFinal(mac_ctx,md,&md_size);
1312 OPENSSL_assert(t > 0);
1314 if (!send && FIPS_mode())
1315 tls_fips_digest_extra(
1317 mac_ctx, rec->input,
1318 rec->length, orig_len);
1323 EVP_MD_CTX_cleanup(&hmac);
1326 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); }
1328 {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
1330 {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); }
1332 {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
1335 if (!SSL_IS_DTLS(ssl))
1337 for (i=7; i>=0; i--)
1340 if (seq[i] != 0) break;
1345 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
1350 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
1353 unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
1354 const void *co = NULL, *so = NULL;
1355 int col = 0, sol = 0;
1359 printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len);
1360 #endif /* KSSL_DEBUG */
1362 #ifdef TLSEXT_TYPE_opaque_prf_input
1363 if (s->s3->client_opaque_prf_input != NULL && s->s3->server_opaque_prf_input != NULL &&
1364 s->s3->client_opaque_prf_input_len > 0 &&
1365 s->s3->client_opaque_prf_input_len == s->s3->server_opaque_prf_input_len)
1367 co = s->s3->client_opaque_prf_input;
1368 col = s->s3->server_opaque_prf_input_len;
1369 so = s->s3->server_opaque_prf_input;
1370 sol = s->s3->client_opaque_prf_input_len; /* must be same as col (see draft-rescorla-tls-opaque-prf-input-00.txt, section 3.1) */
1374 tls1_PRF(ssl_get_algorithm2(s),
1375 TLS_MD_MASTER_SECRET_CONST,TLS_MD_MASTER_SECRET_CONST_SIZE,
1376 s->s3->client_random,SSL3_RANDOM_SIZE,
1378 s->s3->server_random,SSL3_RANDOM_SIZE,
1381 s->session->master_key,buff,sizeof buff);
1383 fprintf(stderr, "Premaster Secret:\n");
1384 BIO_dump_fp(stderr, (char *)p, len);
1385 fprintf(stderr, "Client Random:\n");
1386 BIO_dump_fp(stderr, (char *)s->s3->client_random, SSL3_RANDOM_SIZE);
1387 fprintf(stderr, "Server Random:\n");
1388 BIO_dump_fp(stderr, (char *)s->s3->server_random, SSL3_RANDOM_SIZE);
1389 fprintf(stderr, "Master Secret:\n");
1390 BIO_dump_fp(stderr, (char *)s->session->master_key, SSL3_MASTER_SECRET_SIZE);
1393 #ifdef OPENSSL_SSL_TRACE_CRYPTO
1394 if (s->msg_callback)
1396 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_PREMASTER,
1397 p, len, s, s->msg_callback_arg);
1398 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_CLIENT_RANDOM,
1399 s->s3->client_random, SSL3_RANDOM_SIZE,
1400 s, s->msg_callback_arg);
1401 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_SERVER_RANDOM,
1402 s->s3->server_random, SSL3_RANDOM_SIZE,
1403 s, s->msg_callback_arg);
1404 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_MASTER,
1405 s->session->master_key,
1406 SSL3_MASTER_SECRET_SIZE,
1407 s, s->msg_callback_arg);
1412 printf ("tls1_generate_master_secret() complete\n");
1413 #endif /* KSSL_DEBUG */
1414 return(SSL3_MASTER_SECRET_SIZE);
1417 int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1418 const char *label, size_t llen, const unsigned char *context,
1419 size_t contextlen, int use_context)
1421 unsigned char *buff;
1422 unsigned char *val = NULL;
1423 size_t vallen, currentvalpos;
1427 printf ("tls1_export_keying_material(%p,%p,%d,%s,%d,%p,%d)\n", s, out, olen, label, llen, p, plen);
1428 #endif /* KSSL_DEBUG */
1430 buff = OPENSSL_malloc(olen);
1431 if (buff == NULL) goto err2;
1433 /* construct PRF arguments
1434 * we construct the PRF argument ourself rather than passing separate
1435 * values into the TLS PRF to ensure that the concatenation of values
1436 * does not create a prohibited label.
1438 vallen = llen + SSL3_RANDOM_SIZE * 2;
1441 vallen += 2 + contextlen;
1444 val = OPENSSL_malloc(vallen);
1445 if (val == NULL) goto err2;
1447 memcpy(val + currentvalpos, (unsigned char *) label, llen);
1448 currentvalpos += llen;
1449 memcpy(val + currentvalpos, s->s3->client_random, SSL3_RANDOM_SIZE);
1450 currentvalpos += SSL3_RANDOM_SIZE;
1451 memcpy(val + currentvalpos, s->s3->server_random, SSL3_RANDOM_SIZE);
1452 currentvalpos += SSL3_RANDOM_SIZE;
1456 val[currentvalpos] = (contextlen >> 8) & 0xff;
1458 val[currentvalpos] = contextlen & 0xff;
1460 if ((contextlen > 0) || (context != NULL))
1462 memcpy(val + currentvalpos, context, contextlen);
1466 /* disallow prohibited labels
1467 * note that SSL3_RANDOM_SIZE > max(prohibited label len) =
1468 * 15, so size of val > max(prohibited label len) = 15 and the
1469 * comparisons won't have buffer overflow
1471 if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST,
1472 TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0) goto err1;
1473 if (memcmp(val, TLS_MD_SERVER_FINISH_CONST,
1474 TLS_MD_SERVER_FINISH_CONST_SIZE) == 0) goto err1;
1475 if (memcmp(val, TLS_MD_MASTER_SECRET_CONST,
1476 TLS_MD_MASTER_SECRET_CONST_SIZE) == 0) goto err1;
1477 if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST,
1478 TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0) goto err1;
1480 rv = tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
1486 s->session->master_key,s->session->master_key_length,
1490 printf ("tls1_export_keying_material() complete\n");
1491 #endif /* KSSL_DEBUG */
1494 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
1498 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE);
1501 if (buff != NULL) OPENSSL_free(buff);
1502 if (val != NULL) OPENSSL_free(val);
1506 int tls1_alert_code(int code)
1510 case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY);
1511 case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
1512 case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC);
1513 case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED);
1514 case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW);
1515 case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
1516 case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE);
1517 case SSL_AD_NO_CERTIFICATE: return(-1);
1518 case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE);
1519 case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
1520 case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
1521 case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
1522 case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
1523 case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER);
1524 case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA);
1525 case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED);
1526 case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR);
1527 case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR);
1528 case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION);
1529 case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION);
1530 case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
1531 case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR);
1532 case SSL_AD_USER_CANCELLED: return(TLS1_AD_USER_CANCELLED);
1533 case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION);
1534 case SSL_AD_UNSUPPORTED_EXTENSION: return(TLS1_AD_UNSUPPORTED_EXTENSION);
1535 case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(TLS1_AD_CERTIFICATE_UNOBTAINABLE);
1536 case SSL_AD_UNRECOGNIZED_NAME: return(TLS1_AD_UNRECOGNIZED_NAME);
1537 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
1538 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE);
1539 case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY);
1540 #if 0 /* not appropriate for TLS, not used for DTLS */
1541 case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return
1542 (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);
1544 default: return(-1);