2 * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright 2005 Nokia. All rights reserved.
5 * Licensed under the Apache License 2.0 (the "License"). You may not use
6 * this file except in compliance with the License. You can obtain a copy
7 * in the file LICENSE in the source distribution or at
8 * https://www.openssl.org/source/license.html
12 #include "ssl_local.h"
13 #include "record/record_local.h"
14 #include "internal/ktls.h"
15 #include "internal/cryptlib.h"
16 #include <openssl/comp.h>
17 #include <openssl/evp.h>
18 #include <openssl/kdf.h>
19 #include <openssl/rand.h>
20 #include <openssl/obj_mac.h>
21 #include <openssl/core_names.h>
22 #include <openssl/trace.h>
24 /* seed1 through seed5 are concatenated */
25 static int tls1_PRF(SSL *s,
26 const void *seed1, size_t seed1_len,
27 const void *seed2, size_t seed2_len,
28 const void *seed3, size_t seed3_len,
29 const void *seed4, size_t seed4_len,
30 const void *seed5, size_t seed5_len,
31 const unsigned char *sec, size_t slen,
32 unsigned char *out, size_t olen, int fatal)
34 const EVP_MD *md = ssl_prf_md(s);
36 EVP_KDF_CTX *kctx = NULL;
37 OSSL_PARAM params[8], *p = params;
41 /* Should never happen */
43 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_PRF,
44 ERR_R_INTERNAL_ERROR);
46 SSLerr(SSL_F_TLS1_PRF, ERR_R_INTERNAL_ERROR);
49 kdf = EVP_KDF_fetch(s->ctx->libctx, OSSL_KDF_NAME_TLS1_PRF, s->ctx->propq);
52 kctx = EVP_KDF_new_ctx(kdf);
56 mdname = EVP_MD_name(md);
57 *p++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST,
59 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SECRET,
62 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
63 (void *)seed1, (size_t)seed1_len);
64 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
65 (void *)seed2, (size_t)seed2_len);
66 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
67 (void *)seed3, (size_t)seed3_len);
68 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
69 (void *)seed4, (size_t)seed4_len);
70 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
71 (void *)seed5, (size_t)seed5_len);
72 *p = OSSL_PARAM_construct_end();
73 if (EVP_KDF_set_ctx_params(kctx, params)
74 && EVP_KDF_derive(kctx, out, olen)) {
75 EVP_KDF_free_ctx(kctx);
81 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_PRF,
82 ERR_R_INTERNAL_ERROR);
84 SSLerr(SSL_F_TLS1_PRF, ERR_R_INTERNAL_ERROR);
85 EVP_KDF_free_ctx(kctx);
89 static int tls1_generate_key_block(SSL *s, unsigned char *km, size_t num)
93 /* Calls SSLfatal() as required */
95 TLS_MD_KEY_EXPANSION_CONST,
96 TLS_MD_KEY_EXPANSION_CONST_SIZE, s->s3.server_random,
97 SSL3_RANDOM_SIZE, s->s3.client_random, SSL3_RANDOM_SIZE,
98 NULL, 0, NULL, 0, s->session->master_key,
99 s->session->master_key_length, km, num, 1);
104 #ifndef OPENSSL_NO_KTLS
106 * Count the number of records that were not processed yet from record boundary.
108 * This function assumes that there are only fully formed records read in the
109 * record layer. If read_ahead is enabled, then this might be false and this
110 * function will fail.
112 # ifndef OPENSSL_NO_KTLS_RX
113 static int count_unprocessed_records(SSL *s)
115 SSL3_BUFFER *rbuf = RECORD_LAYER_get_rbuf(&s->rlayer);
119 if (!PACKET_buf_init(&pkt, rbuf->buf + rbuf->offset, rbuf->left))
122 while (PACKET_remaining(&pkt) > 0) {
123 /* Skip record type and version */
124 if (!PACKET_forward(&pkt, 3))
127 /* Read until next record */
128 if (PACKET_get_length_prefixed_2(&pkt, &subpkt))
139 int tls1_change_cipher_state(SSL *s, int which)
141 unsigned char *p, *mac_secret;
142 unsigned char *ms, *key, *iv;
145 #ifndef OPENSSL_NO_COMP
146 const SSL_COMP *comp;
150 size_t *mac_secret_size;
153 size_t n, i, j, k, cl;
155 #ifndef OPENSSL_NO_KTLS
157 struct tls_enable crypto_info;
159 struct tls_crypto_info_all crypto_info;
160 unsigned char *rec_seq;
162 # ifndef OPENSSL_NO_KTLS_RX
163 int count_unprocessed;
170 c = s->s3.tmp.new_sym_enc;
171 m = s->s3.tmp.new_hash;
172 mac_type = s->s3.tmp.new_mac_pkey_type;
173 #ifndef OPENSSL_NO_COMP
174 comp = s->s3.tmp.new_compression;
177 if (which & SSL3_CC_READ) {
179 s->s3.flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
181 s->s3.flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
183 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
184 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
186 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
188 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_TLSTREE)
189 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_TLSTREE;
191 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_TLSTREE;
193 if (s->enc_read_ctx != NULL) {
195 } else if ((s->enc_read_ctx = EVP_CIPHER_CTX_new()) == NULL) {
196 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
197 ERR_R_MALLOC_FAILURE);
201 * make sure it's initialised in case we exit later with an error
203 EVP_CIPHER_CTX_reset(s->enc_read_ctx);
205 dd = s->enc_read_ctx;
206 mac_ctx = ssl_replace_hash(&s->read_hash, NULL);
207 if (mac_ctx == NULL) {
208 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
209 ERR_R_INTERNAL_ERROR);
212 #ifndef OPENSSL_NO_COMP
213 COMP_CTX_free(s->expand);
216 s->expand = COMP_CTX_new(comp->method);
217 if (s->expand == NULL) {
218 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
219 SSL_F_TLS1_CHANGE_CIPHER_STATE,
220 SSL_R_COMPRESSION_LIBRARY_ERROR);
226 * this is done by dtls1_reset_seq_numbers for DTLS
229 RECORD_LAYER_reset_read_sequence(&s->rlayer);
230 mac_secret = &(s->s3.read_mac_secret[0]);
231 mac_secret_size = &(s->s3.read_mac_secret_size);
233 s->statem.enc_write_state = ENC_WRITE_STATE_INVALID;
235 s->s3.flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
237 s->s3.flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
239 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
240 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
242 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
244 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_TLSTREE)
245 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_TLSTREE;
247 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_TLSTREE;
248 if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s)) {
250 } else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL) {
251 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
252 ERR_R_MALLOC_FAILURE);
255 dd = s->enc_write_ctx;
256 if (SSL_IS_DTLS(s)) {
257 mac_ctx = EVP_MD_CTX_new();
258 if (mac_ctx == NULL) {
259 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
260 SSL_F_TLS1_CHANGE_CIPHER_STATE,
261 ERR_R_MALLOC_FAILURE);
264 s->write_hash = mac_ctx;
266 mac_ctx = ssl_replace_hash(&s->write_hash, NULL);
267 if (mac_ctx == NULL) {
268 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
269 SSL_F_TLS1_CHANGE_CIPHER_STATE,
270 ERR_R_MALLOC_FAILURE);
274 #ifndef OPENSSL_NO_COMP
275 COMP_CTX_free(s->compress);
278 s->compress = COMP_CTX_new(comp->method);
279 if (s->compress == NULL) {
280 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
281 SSL_F_TLS1_CHANGE_CIPHER_STATE,
282 SSL_R_COMPRESSION_LIBRARY_ERROR);
288 * this is done by dtls1_reset_seq_numbers for DTLS
291 RECORD_LAYER_reset_write_sequence(&s->rlayer);
292 mac_secret = &(s->s3.write_mac_secret[0]);
293 mac_secret_size = &(s->s3.write_mac_secret_size);
297 EVP_CIPHER_CTX_reset(dd);
299 p = s->s3.tmp.key_block;
300 i = *mac_secret_size = s->s3.tmp.new_mac_secret_size;
302 /* TODO(size_t): convert me */
303 cl = EVP_CIPHER_key_length(c);
305 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
306 /* If GCM/CCM mode only part of IV comes from PRF */
307 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
308 k = EVP_GCM_TLS_FIXED_IV_LEN;
309 else if (EVP_CIPHER_mode(c) == EVP_CIPH_CCM_MODE)
310 k = EVP_CCM_TLS_FIXED_IV_LEN;
312 k = EVP_CIPHER_iv_length(c);
313 if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
314 (which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
331 if (n > s->s3.tmp.key_block_length) {
332 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
333 ERR_R_INTERNAL_ERROR);
337 memcpy(mac_secret, ms, i);
339 if (!(EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER)) {
340 /* TODO(size_t): Convert this function */
341 mac_key = EVP_PKEY_new_mac_key(mac_type, NULL, mac_secret,
342 (int)*mac_secret_size);
344 || EVP_DigestSignInit_ex(mac_ctx, NULL,
345 EVP_MD_name(m), s->ctx->propq,
346 mac_key, s->ctx->libctx) <= 0) {
347 EVP_PKEY_free(mac_key);
348 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
349 ERR_R_INTERNAL_ERROR);
352 EVP_PKEY_free(mac_key);
355 OSSL_TRACE_BEGIN(TLS) {
356 BIO_printf(trc_out, "which = %04X, mac key:\n", which);
357 BIO_dump_indent(trc_out, ms, i, 4);
358 } OSSL_TRACE_END(TLS);
360 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) {
361 if (!EVP_CipherInit_ex(dd, c, NULL, key, NULL, (which & SSL3_CC_WRITE))
362 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, (int)k,
364 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
365 ERR_R_INTERNAL_ERROR);
368 } else if (EVP_CIPHER_mode(c) == EVP_CIPH_CCM_MODE) {
371 new_cipher->algorithm_enc & (SSL_AES128CCM8 | SSL_AES256CCM8))
372 taglen = EVP_CCM8_TLS_TAG_LEN;
374 taglen = EVP_CCM_TLS_TAG_LEN;
375 if (!EVP_CipherInit_ex(dd, c, NULL, NULL, NULL, (which & SSL3_CC_WRITE))
376 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_IVLEN, 12, NULL)
377 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_TAG, taglen, NULL)
378 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_CCM_SET_IV_FIXED, (int)k, iv)
379 || !EVP_CipherInit_ex(dd, NULL, NULL, key, NULL, -1)) {
380 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
381 ERR_R_INTERNAL_ERROR);
385 if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE))) {
386 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
387 ERR_R_INTERNAL_ERROR);
391 /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
392 if ((EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size
393 && !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_MAC_KEY,
394 (int)*mac_secret_size, mac_secret)) {
395 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
396 ERR_R_INTERNAL_ERROR);
399 #ifndef OPENSSL_NO_KTLS
403 if (((which & SSL3_CC_READ) && (s->mode & SSL_MODE_NO_KTLS_RX))
404 || ((which & SSL3_CC_WRITE) && (s->mode & SSL_MODE_NO_KTLS_TX)))
407 /* ktls supports only the maximum fragment size */
408 if (ssl_get_max_send_fragment(s) != SSL3_RT_MAX_PLAIN_LENGTH)
412 memset(&crypto_info, 0, sizeof(crypto_info));
413 switch (s->s3.tmp.new_cipher->algorithm_enc) {
416 crypto_info.cipher_algorithm = CRYPTO_AES_NIST_GCM_16;
417 crypto_info.iv_len = EVP_GCM_TLS_FIXED_IV_LEN;
423 switch (s->s3.tmp.new_cipher->algorithm_mac) {
425 crypto_info.auth_algorithm = CRYPTO_SHA1_HMAC;
428 crypto_info.auth_algorithm = CRYPTO_SHA2_256_HMAC;
431 crypto_info.auth_algorithm = CRYPTO_SHA2_384_HMAC;
436 crypto_info.cipher_algorithm = CRYPTO_AES_CBC;
437 crypto_info.iv_len = EVP_CIPHER_iv_length(c);
438 crypto_info.auth_key = ms;
439 crypto_info.auth_key_len = *mac_secret_size;
444 crypto_info.cipher_key = key;
445 crypto_info.cipher_key_len = EVP_CIPHER_key_length(c);
447 crypto_info.tls_vmajor = (s->version >> 8) & 0x000000ff;
448 crypto_info.tls_vminor = (s->version & 0x000000ff);
449 # else /* !defined(__FreeBSD__) */
450 /* check that cipher is supported */
451 if (!ktls_check_supported_cipher(c, dd))
455 if (s->version != TLS1_2_VERSION)
459 if (which & SSL3_CC_WRITE)
464 if (!ossl_assert(bio != NULL)) {
465 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
466 ERR_R_INTERNAL_ERROR);
470 /* All future data will get encrypted by ktls. Flush the BIO or skip ktls */
471 if (which & SSL3_CC_WRITE) {
472 if (BIO_flush(bio) <= 0)
476 /* ktls doesn't support renegotiation */
477 if ((BIO_get_ktls_send(s->wbio) && (which & SSL3_CC_WRITE)) ||
478 (BIO_get_ktls_recv(s->rbio) && (which & SSL3_CC_READ))) {
479 SSLfatal(s, SSL_AD_NO_RENEGOTIATION, SSL_F_TLS1_CHANGE_CIPHER_STATE,
480 ERR_R_INTERNAL_ERROR);
485 if (which & SSL3_CC_WRITE)
486 rl_sequence = RECORD_LAYER_get_write_sequence(&s->rlayer);
488 rl_sequence = RECORD_LAYER_get_read_sequence(&s->rlayer);
490 if (!ktls_configure_crypto(c, s->version, dd, rl_sequence, &crypto_info,
494 if (which & SSL3_CC_READ) {
495 # ifndef OPENSSL_NO_KTLS_RX
496 count_unprocessed = count_unprocessed_records(s);
497 if (count_unprocessed < 0)
500 /* increment the crypto_info record sequence */
501 while (count_unprocessed) {
502 for (bit = 7; bit >= 0; bit--) { /* increment */
504 if (rec_seq[bit] != 0)
513 # endif /* !__FreeBSD__ */
515 /* ktls works with user provided buffers directly */
516 if (BIO_set_ktls(bio, &crypto_info, which & SSL3_CC_WRITE)) {
517 if (which & SSL3_CC_WRITE)
518 ssl3_release_write_buffer(s);
519 SSL_set_options(s, SSL_OP_NO_RENEGOTIATION);
523 #endif /* OPENSSL_NO_KTLS */
524 s->statem.enc_write_state = ENC_WRITE_STATE_VALID;
526 OSSL_TRACE_BEGIN(TLS) {
527 BIO_printf(trc_out, "which = %04X, key:\n", which);
528 BIO_dump_indent(trc_out, key, EVP_CIPHER_key_length(c), 4);
529 BIO_printf(trc_out, "iv:\n");
530 BIO_dump_indent(trc_out, iv, k, 4);
531 } OSSL_TRACE_END(TLS);
538 int tls1_setup_key_block(SSL *s)
544 int mac_type = NID_undef;
545 size_t num, mac_secret_size = 0;
548 if (s->s3.tmp.key_block_length != 0)
551 if (!ssl_cipher_get_evp(s->ctx, s->session, &c, &hash, &mac_type,
552 &mac_secret_size, &comp, s->ext.use_etm)) {
553 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_SETUP_KEY_BLOCK,
554 SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
558 ssl_evp_cipher_free(s->s3.tmp.new_sym_enc);
559 s->s3.tmp.new_sym_enc = c;
560 ssl_evp_md_free(s->s3.tmp.new_hash);
561 s->s3.tmp.new_hash = hash;
562 s->s3.tmp.new_mac_pkey_type = mac_type;
563 s->s3.tmp.new_mac_secret_size = mac_secret_size;
564 num = EVP_CIPHER_key_length(c) + mac_secret_size + EVP_CIPHER_iv_length(c);
567 ssl3_cleanup_key_block(s);
569 if ((p = OPENSSL_malloc(num)) == NULL) {
570 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_SETUP_KEY_BLOCK,
571 ERR_R_MALLOC_FAILURE);
575 s->s3.tmp.key_block_length = num;
576 s->s3.tmp.key_block = p;
578 OSSL_TRACE_BEGIN(TLS) {
579 BIO_printf(trc_out, "client random\n");
580 BIO_dump_indent(trc_out, s->s3.client_random, SSL3_RANDOM_SIZE, 4);
581 BIO_printf(trc_out, "server random\n");
582 BIO_dump_indent(trc_out, s->s3.server_random, SSL3_RANDOM_SIZE, 4);
583 BIO_printf(trc_out, "master key\n");
584 BIO_dump_indent(trc_out,
585 s->session->master_key,
586 s->session->master_key_length, 4);
587 } OSSL_TRACE_END(TLS);
589 if (!tls1_generate_key_block(s, p, num)) {
590 /* SSLfatal() already called */
594 OSSL_TRACE_BEGIN(TLS) {
595 BIO_printf(trc_out, "key block\n");
596 BIO_dump_indent(trc_out, p, num, 4);
597 } OSSL_TRACE_END(TLS);
599 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)
600 && s->method->version <= TLS1_VERSION) {
602 * enable vulnerability countermeasure for CBC ciphers with known-IV
603 * problem (http://www.openssl.org/~bodo/tls-cbc.txt)
605 s->s3.need_empty_fragments = 1;
607 if (s->session->cipher != NULL) {
608 if (s->session->cipher->algorithm_enc == SSL_eNULL)
609 s->s3.need_empty_fragments = 0;
611 #ifndef OPENSSL_NO_RC4
612 if (s->session->cipher->algorithm_enc == SSL_RC4)
613 s->s3.need_empty_fragments = 0;
623 size_t tls1_final_finish_mac(SSL *s, const char *str, size_t slen,
627 unsigned char hash[EVP_MAX_MD_SIZE];
628 size_t finished_size = TLS1_FINISH_MAC_LENGTH;
630 if (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kGOST18)
633 if (!ssl3_digest_cached_records(s, 0)) {
634 /* SSLfatal() already called */
638 if (!ssl_handshake_hash(s, hash, sizeof(hash), &hashlen)) {
639 /* SSLfatal() already called */
643 if (!tls1_PRF(s, str, slen, hash, hashlen, NULL, 0, NULL, 0, NULL, 0,
644 s->session->master_key, s->session->master_key_length,
645 out, finished_size, 1)) {
646 /* SSLfatal() already called */
649 OPENSSL_cleanse(hash, hashlen);
650 return finished_size;
653 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
654 size_t len, size_t *secret_size)
656 if (s->session->flags & SSL_SESS_FLAG_EXTMS) {
657 unsigned char hash[EVP_MAX_MD_SIZE * 2];
660 * Digest cached records keeping record buffer (if present): this won't
661 * affect client auth because we're freezing the buffer at the same
662 * point (after client key exchange and before certificate verify)
664 if (!ssl3_digest_cached_records(s, 1)
665 || !ssl_handshake_hash(s, hash, sizeof(hash), &hashlen)) {
666 /* SSLfatal() already called */
669 OSSL_TRACE_BEGIN(TLS) {
670 BIO_printf(trc_out, "Handshake hashes:\n");
671 BIO_dump(trc_out, (char *)hash, hashlen);
672 } OSSL_TRACE_END(TLS);
674 TLS_MD_EXTENDED_MASTER_SECRET_CONST,
675 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE,
679 NULL, 0, p, len, out,
680 SSL3_MASTER_SECRET_SIZE, 1)) {
681 /* SSLfatal() already called */
684 OPENSSL_cleanse(hash, hashlen);
687 TLS_MD_MASTER_SECRET_CONST,
688 TLS_MD_MASTER_SECRET_CONST_SIZE,
689 s->s3.client_random, SSL3_RANDOM_SIZE,
691 s->s3.server_random, SSL3_RANDOM_SIZE,
692 NULL, 0, p, len, out,
693 SSL3_MASTER_SECRET_SIZE, 1)) {
694 /* SSLfatal() already called */
699 OSSL_TRACE_BEGIN(TLS) {
700 BIO_printf(trc_out, "Premaster Secret:\n");
701 BIO_dump_indent(trc_out, p, len, 4);
702 BIO_printf(trc_out, "Client Random:\n");
703 BIO_dump_indent(trc_out, s->s3.client_random, SSL3_RANDOM_SIZE, 4);
704 BIO_printf(trc_out, "Server Random:\n");
705 BIO_dump_indent(trc_out, s->s3.server_random, SSL3_RANDOM_SIZE, 4);
706 BIO_printf(trc_out, "Master Secret:\n");
707 BIO_dump_indent(trc_out,
708 s->session->master_key,
709 SSL3_MASTER_SECRET_SIZE, 4);
710 } OSSL_TRACE_END(TLS);
712 *secret_size = SSL3_MASTER_SECRET_SIZE;
716 int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
717 const char *label, size_t llen,
718 const unsigned char *context,
719 size_t contextlen, int use_context)
721 unsigned char *val = NULL;
722 size_t vallen = 0, currentvalpos;
726 * construct PRF arguments we construct the PRF argument ourself rather
727 * than passing separate values into the TLS PRF to ensure that the
728 * concatenation of values does not create a prohibited label.
730 vallen = llen + SSL3_RANDOM_SIZE * 2;
732 vallen += 2 + contextlen;
735 val = OPENSSL_malloc(vallen);
739 memcpy(val + currentvalpos, (unsigned char *)label, llen);
740 currentvalpos += llen;
741 memcpy(val + currentvalpos, s->s3.client_random, SSL3_RANDOM_SIZE);
742 currentvalpos += SSL3_RANDOM_SIZE;
743 memcpy(val + currentvalpos, s->s3.server_random, SSL3_RANDOM_SIZE);
744 currentvalpos += SSL3_RANDOM_SIZE;
747 val[currentvalpos] = (contextlen >> 8) & 0xff;
749 val[currentvalpos] = contextlen & 0xff;
751 if ((contextlen > 0) || (context != NULL)) {
752 memcpy(val + currentvalpos, context, contextlen);
757 * disallow prohibited labels note that SSL3_RANDOM_SIZE > max(prohibited
758 * label len) = 15, so size of val > max(prohibited label len) = 15 and
759 * the comparisons won't have buffer overflow
761 if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST,
762 TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0)
764 if (memcmp(val, TLS_MD_SERVER_FINISH_CONST,
765 TLS_MD_SERVER_FINISH_CONST_SIZE) == 0)
767 if (memcmp(val, TLS_MD_MASTER_SECRET_CONST,
768 TLS_MD_MASTER_SECRET_CONST_SIZE) == 0)
770 if (memcmp(val, TLS_MD_EXTENDED_MASTER_SECRET_CONST,
771 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE) == 0)
773 if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST,
774 TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0)
783 s->session->master_key, s->session->master_key_length,
788 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
792 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE);
795 OPENSSL_clear_free(val, vallen);
799 int tls1_alert_code(int code)
802 case SSL_AD_CLOSE_NOTIFY:
803 return SSL3_AD_CLOSE_NOTIFY;
804 case SSL_AD_UNEXPECTED_MESSAGE:
805 return SSL3_AD_UNEXPECTED_MESSAGE;
806 case SSL_AD_BAD_RECORD_MAC:
807 return SSL3_AD_BAD_RECORD_MAC;
808 case SSL_AD_DECRYPTION_FAILED:
809 return TLS1_AD_DECRYPTION_FAILED;
810 case SSL_AD_RECORD_OVERFLOW:
811 return TLS1_AD_RECORD_OVERFLOW;
812 case SSL_AD_DECOMPRESSION_FAILURE:
813 return SSL3_AD_DECOMPRESSION_FAILURE;
814 case SSL_AD_HANDSHAKE_FAILURE:
815 return SSL3_AD_HANDSHAKE_FAILURE;
816 case SSL_AD_NO_CERTIFICATE:
818 case SSL_AD_BAD_CERTIFICATE:
819 return SSL3_AD_BAD_CERTIFICATE;
820 case SSL_AD_UNSUPPORTED_CERTIFICATE:
821 return SSL3_AD_UNSUPPORTED_CERTIFICATE;
822 case SSL_AD_CERTIFICATE_REVOKED:
823 return SSL3_AD_CERTIFICATE_REVOKED;
824 case SSL_AD_CERTIFICATE_EXPIRED:
825 return SSL3_AD_CERTIFICATE_EXPIRED;
826 case SSL_AD_CERTIFICATE_UNKNOWN:
827 return SSL3_AD_CERTIFICATE_UNKNOWN;
828 case SSL_AD_ILLEGAL_PARAMETER:
829 return SSL3_AD_ILLEGAL_PARAMETER;
830 case SSL_AD_UNKNOWN_CA:
831 return TLS1_AD_UNKNOWN_CA;
832 case SSL_AD_ACCESS_DENIED:
833 return TLS1_AD_ACCESS_DENIED;
834 case SSL_AD_DECODE_ERROR:
835 return TLS1_AD_DECODE_ERROR;
836 case SSL_AD_DECRYPT_ERROR:
837 return TLS1_AD_DECRYPT_ERROR;
838 case SSL_AD_EXPORT_RESTRICTION:
839 return TLS1_AD_EXPORT_RESTRICTION;
840 case SSL_AD_PROTOCOL_VERSION:
841 return TLS1_AD_PROTOCOL_VERSION;
842 case SSL_AD_INSUFFICIENT_SECURITY:
843 return TLS1_AD_INSUFFICIENT_SECURITY;
844 case SSL_AD_INTERNAL_ERROR:
845 return TLS1_AD_INTERNAL_ERROR;
846 case SSL_AD_USER_CANCELLED:
847 return TLS1_AD_USER_CANCELLED;
848 case SSL_AD_NO_RENEGOTIATION:
849 return TLS1_AD_NO_RENEGOTIATION;
850 case SSL_AD_UNSUPPORTED_EXTENSION:
851 return TLS1_AD_UNSUPPORTED_EXTENSION;
852 case SSL_AD_CERTIFICATE_UNOBTAINABLE:
853 return TLS1_AD_CERTIFICATE_UNOBTAINABLE;
854 case SSL_AD_UNRECOGNIZED_NAME:
855 return TLS1_AD_UNRECOGNIZED_NAME;
856 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
857 return TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
858 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
859 return TLS1_AD_BAD_CERTIFICATE_HASH_VALUE;
860 case SSL_AD_UNKNOWN_PSK_IDENTITY:
861 return TLS1_AD_UNKNOWN_PSK_IDENTITY;
862 case SSL_AD_INAPPROPRIATE_FALLBACK:
863 return TLS1_AD_INAPPROPRIATE_FALLBACK;
864 case SSL_AD_NO_APPLICATION_PROTOCOL:
865 return TLS1_AD_NO_APPLICATION_PROTOCOL;
866 case SSL_AD_CERTIFICATE_REQUIRED:
867 return SSL_AD_HANDSHAKE_FAILURE;