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_CTX_new(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_CTX_set_params(kctx, params)
74 && EVP_KDF_derive(kctx, out, olen)) {
75 EVP_KDF_CTX_free(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_CTX_free(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 static int count_unprocessed_records(SSL *s)
114 SSL3_BUFFER *rbuf = RECORD_LAYER_get_rbuf(&s->rlayer);
118 if (!PACKET_buf_init(&pkt, rbuf->buf + rbuf->offset, rbuf->left))
121 while (PACKET_remaining(&pkt) > 0) {
122 /* Skip record type and version */
123 if (!PACKET_forward(&pkt, 3))
126 /* Read until next record */
127 if (PACKET_get_length_prefixed_2(&pkt, &subpkt))
137 int tls1_change_cipher_state(SSL *s, int which)
139 unsigned char *p, *mac_secret;
140 unsigned char *ms, *key, *iv;
143 #ifndef OPENSSL_NO_COMP
144 const SSL_COMP *comp;
148 size_t *mac_secret_size;
151 size_t n, i, j, k, cl;
153 #ifndef OPENSSL_NO_KTLS
155 struct tls_enable crypto_info;
157 struct tls12_crypto_info_aes_gcm_128 crypto_info;
158 unsigned char geniv[12];
159 int count_unprocessed;
165 c = s->s3.tmp.new_sym_enc;
166 m = s->s3.tmp.new_hash;
167 mac_type = s->s3.tmp.new_mac_pkey_type;
168 #ifndef OPENSSL_NO_COMP
169 comp = s->s3.tmp.new_compression;
172 if (which & SSL3_CC_READ) {
174 s->s3.flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
176 s->s3.flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
178 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
179 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
181 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
183 if (s->enc_read_ctx != NULL) {
185 } else if ((s->enc_read_ctx = EVP_CIPHER_CTX_new()) == NULL) {
186 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
187 ERR_R_MALLOC_FAILURE);
191 * make sure it's initialised in case we exit later with an error
193 EVP_CIPHER_CTX_reset(s->enc_read_ctx);
195 dd = s->enc_read_ctx;
196 mac_ctx = ssl_replace_hash(&s->read_hash, NULL);
197 if (mac_ctx == NULL) {
198 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
199 ERR_R_INTERNAL_ERROR);
202 #ifndef OPENSSL_NO_COMP
203 COMP_CTX_free(s->expand);
206 s->expand = COMP_CTX_new(comp->method);
207 if (s->expand == NULL) {
208 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
209 SSL_F_TLS1_CHANGE_CIPHER_STATE,
210 SSL_R_COMPRESSION_LIBRARY_ERROR);
216 * this is done by dtls1_reset_seq_numbers for DTLS
219 RECORD_LAYER_reset_read_sequence(&s->rlayer);
220 mac_secret = &(s->s3.read_mac_secret[0]);
221 mac_secret_size = &(s->s3.read_mac_secret_size);
223 s->statem.enc_write_state = ENC_WRITE_STATE_INVALID;
225 s->s3.flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
227 s->s3.flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
229 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
230 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
232 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
233 if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s)) {
235 } else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL) {
236 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
237 ERR_R_MALLOC_FAILURE);
240 dd = s->enc_write_ctx;
241 if (SSL_IS_DTLS(s)) {
242 mac_ctx = EVP_MD_CTX_new();
243 if (mac_ctx == NULL) {
244 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
245 SSL_F_TLS1_CHANGE_CIPHER_STATE,
246 ERR_R_MALLOC_FAILURE);
249 s->write_hash = mac_ctx;
251 mac_ctx = ssl_replace_hash(&s->write_hash, NULL);
252 if (mac_ctx == NULL) {
253 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
254 SSL_F_TLS1_CHANGE_CIPHER_STATE,
255 ERR_R_MALLOC_FAILURE);
259 #ifndef OPENSSL_NO_COMP
260 COMP_CTX_free(s->compress);
263 s->compress = COMP_CTX_new(comp->method);
264 if (s->compress == NULL) {
265 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
266 SSL_F_TLS1_CHANGE_CIPHER_STATE,
267 SSL_R_COMPRESSION_LIBRARY_ERROR);
273 * this is done by dtls1_reset_seq_numbers for DTLS
276 RECORD_LAYER_reset_write_sequence(&s->rlayer);
277 mac_secret = &(s->s3.write_mac_secret[0]);
278 mac_secret_size = &(s->s3.write_mac_secret_size);
282 EVP_CIPHER_CTX_reset(dd);
284 p = s->s3.tmp.key_block;
285 i = *mac_secret_size = s->s3.tmp.new_mac_secret_size;
287 /* TODO(size_t): convert me */
288 cl = EVP_CIPHER_key_length(c);
290 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
291 /* If GCM/CCM mode only part of IV comes from PRF */
292 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
293 k = EVP_GCM_TLS_FIXED_IV_LEN;
294 else if (EVP_CIPHER_mode(c) == EVP_CIPH_CCM_MODE)
295 k = EVP_CCM_TLS_FIXED_IV_LEN;
297 k = EVP_CIPHER_iv_length(c);
298 if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
299 (which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
316 if (n > s->s3.tmp.key_block_length) {
317 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
318 ERR_R_INTERNAL_ERROR);
322 memcpy(mac_secret, ms, i);
324 if (!(EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER)) {
325 /* TODO(size_t): Convert this function */
326 mac_key = EVP_PKEY_new_mac_key(mac_type, NULL, mac_secret,
327 (int)*mac_secret_size);
329 || EVP_DigestSignInit_ex(mac_ctx, NULL,
330 EVP_MD_name(m), s->ctx->propq,
331 mac_key, s->ctx->libctx) <= 0) {
332 EVP_PKEY_free(mac_key);
333 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
334 ERR_R_INTERNAL_ERROR);
337 EVP_PKEY_free(mac_key);
340 OSSL_TRACE_BEGIN(TLS) {
341 BIO_printf(trc_out, "which = %04X, mac key:\n", which);
342 BIO_dump_indent(trc_out, ms, i, 4);
343 } OSSL_TRACE_END(TLS);
345 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) {
346 if (!EVP_CipherInit_ex(dd, c, NULL, key, NULL, (which & SSL3_CC_WRITE))
347 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, (int)k,
349 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
350 ERR_R_INTERNAL_ERROR);
353 } else if (EVP_CIPHER_mode(c) == EVP_CIPH_CCM_MODE) {
356 new_cipher->algorithm_enc & (SSL_AES128CCM8 | SSL_AES256CCM8))
357 taglen = EVP_CCM8_TLS_TAG_LEN;
359 taglen = EVP_CCM_TLS_TAG_LEN;
360 if (!EVP_CipherInit_ex(dd, c, NULL, NULL, NULL, (which & SSL3_CC_WRITE))
361 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_IVLEN, 12, NULL)
362 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_TAG, taglen, NULL)
363 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_CCM_SET_IV_FIXED, (int)k, iv)
364 || !EVP_CipherInit_ex(dd, NULL, NULL, key, NULL, -1)) {
365 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
366 ERR_R_INTERNAL_ERROR);
370 if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE))) {
371 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
372 ERR_R_INTERNAL_ERROR);
376 /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
377 if ((EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size
378 && !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_MAC_KEY,
379 (int)*mac_secret_size, mac_secret)) {
380 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
381 ERR_R_INTERNAL_ERROR);
384 #ifndef OPENSSL_NO_KTLS
388 if (((which & SSL3_CC_READ) && (s->mode & SSL_MODE_NO_KTLS_RX))
389 || ((which & SSL3_CC_WRITE) && (s->mode & SSL_MODE_NO_KTLS_TX)))
392 /* ktls supports only the maximum fragment size */
393 if (ssl_get_max_send_fragment(s) != SSL3_RT_MAX_PLAIN_LENGTH)
397 memset(&crypto_info, 0, sizeof(crypto_info));
398 switch (s->s3.tmp.new_cipher->algorithm_enc) {
401 crypto_info.cipher_algorithm = CRYPTO_AES_NIST_GCM_16;
402 crypto_info.iv_len = EVP_GCM_TLS_FIXED_IV_LEN;
408 switch (s->s3.tmp.new_cipher->algorithm_mac) {
410 crypto_info.auth_algorithm = CRYPTO_SHA1_HMAC;
413 crypto_info.auth_algorithm = CRYPTO_SHA2_256_HMAC;
416 crypto_info.auth_algorithm = CRYPTO_SHA2_384_HMAC;
421 crypto_info.cipher_algorithm = CRYPTO_AES_CBC;
422 crypto_info.iv_len = EVP_CIPHER_iv_length(c);
423 crypto_info.auth_key = ms;
424 crypto_info.auth_key_len = *mac_secret_size;
429 crypto_info.cipher_key = key;
430 crypto_info.cipher_key_len = EVP_CIPHER_key_length(c);
432 crypto_info.tls_vmajor = (s->version >> 8) & 0x000000ff;
433 crypto_info.tls_vminor = (s->version & 0x000000ff);
435 /* check that cipher is AES_GCM_128 */
436 if (EVP_CIPHER_nid(c) != NID_aes_128_gcm
437 || EVP_CIPHER_mode(c) != EVP_CIPH_GCM_MODE
438 || EVP_CIPHER_key_length(c) != TLS_CIPHER_AES_GCM_128_KEY_SIZE)
441 /* check version is 1.2 */
442 if (s->version != TLS1_2_VERSION)
446 if (which & SSL3_CC_WRITE)
451 if (!ossl_assert(bio != NULL)) {
452 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
453 ERR_R_INTERNAL_ERROR);
457 /* All future data will get encrypted by ktls. Flush the BIO or skip ktls */
458 if (which & SSL3_CC_WRITE) {
459 if (BIO_flush(bio) <= 0)
463 /* ktls doesn't support renegotiation */
464 if ((BIO_get_ktls_send(s->wbio) && (which & SSL3_CC_WRITE)) ||
465 (BIO_get_ktls_recv(s->rbio) && (which & SSL3_CC_READ))) {
466 SSLfatal(s, SSL_AD_NO_RENEGOTIATION, SSL_F_TLS1_CHANGE_CIPHER_STATE,
467 ERR_R_INTERNAL_ERROR);
472 memset(&crypto_info, 0, sizeof(crypto_info));
473 crypto_info.info.cipher_type = TLS_CIPHER_AES_GCM_128;
474 crypto_info.info.version = s->version;
476 EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GET_IV,
477 EVP_GCM_TLS_FIXED_IV_LEN + EVP_GCM_TLS_EXPLICIT_IV_LEN,
479 memcpy(crypto_info.iv, geniv + EVP_GCM_TLS_FIXED_IV_LEN,
480 TLS_CIPHER_AES_GCM_128_IV_SIZE);
481 memcpy(crypto_info.salt, geniv, TLS_CIPHER_AES_GCM_128_SALT_SIZE);
482 memcpy(crypto_info.key, key, EVP_CIPHER_key_length(c));
483 if (which & SSL3_CC_WRITE)
484 memcpy(crypto_info.rec_seq, &s->rlayer.write_sequence,
485 TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE);
487 memcpy(crypto_info.rec_seq, &s->rlayer.read_sequence,
488 TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE);
490 if (which & SSL3_CC_READ) {
491 count_unprocessed = count_unprocessed_records(s);
492 if (count_unprocessed < 0)
495 /* increment the crypto_info record sequence */
496 while (count_unprocessed) {
497 for (bit = 7; bit >= 0; bit--) { /* increment */
498 ++crypto_info.rec_seq[bit];
499 if (crypto_info.rec_seq[bit] != 0)
507 /* ktls works with user provided buffers directly */
508 if (BIO_set_ktls(bio, &crypto_info, which & SSL3_CC_WRITE)) {
509 if (which & SSL3_CC_WRITE)
510 ssl3_release_write_buffer(s);
511 SSL_set_options(s, SSL_OP_NO_RENEGOTIATION);
515 #endif /* OPENSSL_NO_KTLS */
516 s->statem.enc_write_state = ENC_WRITE_STATE_VALID;
518 OSSL_TRACE_BEGIN(TLS) {
519 BIO_printf(trc_out, "which = %04X, key:\n", which);
520 BIO_dump_indent(trc_out, key, EVP_CIPHER_key_length(c), 4);
521 BIO_printf(trc_out, "iv:\n");
522 BIO_dump_indent(trc_out, iv, k, 4);
523 } OSSL_TRACE_END(TLS);
530 int tls1_setup_key_block(SSL *s)
536 int mac_type = NID_undef;
537 size_t num, mac_secret_size = 0;
540 if (s->s3.tmp.key_block_length != 0)
543 if (!ssl_cipher_get_evp(s->ctx, s->session, &c, &hash, &mac_type,
544 &mac_secret_size, &comp, s->ext.use_etm)) {
545 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_SETUP_KEY_BLOCK,
546 SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
550 ssl_evp_cipher_free(s->s3.tmp.new_sym_enc);
551 s->s3.tmp.new_sym_enc = c;
552 ssl_evp_md_free(s->s3.tmp.new_hash);
553 s->s3.tmp.new_hash = hash;
554 s->s3.tmp.new_mac_pkey_type = mac_type;
555 s->s3.tmp.new_mac_secret_size = mac_secret_size;
556 num = EVP_CIPHER_key_length(c) + mac_secret_size + EVP_CIPHER_iv_length(c);
559 ssl3_cleanup_key_block(s);
561 if ((p = OPENSSL_malloc(num)) == NULL) {
562 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_SETUP_KEY_BLOCK,
563 ERR_R_MALLOC_FAILURE);
567 s->s3.tmp.key_block_length = num;
568 s->s3.tmp.key_block = p;
570 OSSL_TRACE_BEGIN(TLS) {
571 BIO_printf(trc_out, "client random\n");
572 BIO_dump_indent(trc_out, s->s3.client_random, SSL3_RANDOM_SIZE, 4);
573 BIO_printf(trc_out, "server random\n");
574 BIO_dump_indent(trc_out, s->s3.server_random, SSL3_RANDOM_SIZE, 4);
575 BIO_printf(trc_out, "master key\n");
576 BIO_dump_indent(trc_out,
577 s->session->master_key,
578 s->session->master_key_length, 4);
579 } OSSL_TRACE_END(TLS);
581 if (!tls1_generate_key_block(s, p, num)) {
582 /* SSLfatal() already called */
586 OSSL_TRACE_BEGIN(TLS) {
587 BIO_printf(trc_out, "key block\n");
588 BIO_dump_indent(trc_out, p, num, 4);
589 } OSSL_TRACE_END(TLS);
591 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)
592 && s->method->version <= TLS1_VERSION) {
594 * enable vulnerability countermeasure for CBC ciphers with known-IV
595 * problem (http://www.openssl.org/~bodo/tls-cbc.txt)
597 s->s3.need_empty_fragments = 1;
599 if (s->session->cipher != NULL) {
600 if (s->session->cipher->algorithm_enc == SSL_eNULL)
601 s->s3.need_empty_fragments = 0;
603 #ifndef OPENSSL_NO_RC4
604 if (s->session->cipher->algorithm_enc == SSL_RC4)
605 s->s3.need_empty_fragments = 0;
615 size_t tls1_final_finish_mac(SSL *s, const char *str, size_t slen,
619 unsigned char hash[EVP_MAX_MD_SIZE];
621 if (!ssl3_digest_cached_records(s, 0)) {
622 /* SSLfatal() already called */
626 if (!ssl_handshake_hash(s, hash, sizeof(hash), &hashlen)) {
627 /* SSLfatal() already called */
631 if (!tls1_PRF(s, str, slen, hash, hashlen, NULL, 0, NULL, 0, NULL, 0,
632 s->session->master_key, s->session->master_key_length,
633 out, TLS1_FINISH_MAC_LENGTH, 1)) {
634 /* SSLfatal() already called */
637 OPENSSL_cleanse(hash, hashlen);
638 return TLS1_FINISH_MAC_LENGTH;
641 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
642 size_t len, size_t *secret_size)
644 if (s->session->flags & SSL_SESS_FLAG_EXTMS) {
645 unsigned char hash[EVP_MAX_MD_SIZE * 2];
648 * Digest cached records keeping record buffer (if present): this won't
649 * affect client auth because we're freezing the buffer at the same
650 * point (after client key exchange and before certificate verify)
652 if (!ssl3_digest_cached_records(s, 1)
653 || !ssl_handshake_hash(s, hash, sizeof(hash), &hashlen)) {
654 /* SSLfatal() already called */
657 OSSL_TRACE_BEGIN(TLS) {
658 BIO_printf(trc_out, "Handshake hashes:\n");
659 BIO_dump(trc_out, (char *)hash, hashlen);
660 } OSSL_TRACE_END(TLS);
662 TLS_MD_EXTENDED_MASTER_SECRET_CONST,
663 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE,
667 NULL, 0, p, len, out,
668 SSL3_MASTER_SECRET_SIZE, 1)) {
669 /* SSLfatal() already called */
672 OPENSSL_cleanse(hash, hashlen);
675 TLS_MD_MASTER_SECRET_CONST,
676 TLS_MD_MASTER_SECRET_CONST_SIZE,
677 s->s3.client_random, SSL3_RANDOM_SIZE,
679 s->s3.server_random, SSL3_RANDOM_SIZE,
680 NULL, 0, p, len, out,
681 SSL3_MASTER_SECRET_SIZE, 1)) {
682 /* SSLfatal() already called */
687 OSSL_TRACE_BEGIN(TLS) {
688 BIO_printf(trc_out, "Premaster Secret:\n");
689 BIO_dump_indent(trc_out, p, len, 4);
690 BIO_printf(trc_out, "Client Random:\n");
691 BIO_dump_indent(trc_out, s->s3.client_random, SSL3_RANDOM_SIZE, 4);
692 BIO_printf(trc_out, "Server Random:\n");
693 BIO_dump_indent(trc_out, s->s3.server_random, SSL3_RANDOM_SIZE, 4);
694 BIO_printf(trc_out, "Master Secret:\n");
695 BIO_dump_indent(trc_out,
696 s->session->master_key,
697 SSL3_MASTER_SECRET_SIZE, 4);
698 } OSSL_TRACE_END(TLS);
700 *secret_size = SSL3_MASTER_SECRET_SIZE;
704 int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
705 const char *label, size_t llen,
706 const unsigned char *context,
707 size_t contextlen, int use_context)
709 unsigned char *val = NULL;
710 size_t vallen = 0, currentvalpos;
714 * construct PRF arguments we construct the PRF argument ourself rather
715 * than passing separate values into the TLS PRF to ensure that the
716 * concatenation of values does not create a prohibited label.
718 vallen = llen + SSL3_RANDOM_SIZE * 2;
720 vallen += 2 + contextlen;
723 val = OPENSSL_malloc(vallen);
727 memcpy(val + currentvalpos, (unsigned char *)label, llen);
728 currentvalpos += llen;
729 memcpy(val + currentvalpos, s->s3.client_random, SSL3_RANDOM_SIZE);
730 currentvalpos += SSL3_RANDOM_SIZE;
731 memcpy(val + currentvalpos, s->s3.server_random, SSL3_RANDOM_SIZE);
732 currentvalpos += SSL3_RANDOM_SIZE;
735 val[currentvalpos] = (contextlen >> 8) & 0xff;
737 val[currentvalpos] = contextlen & 0xff;
739 if ((contextlen > 0) || (context != NULL)) {
740 memcpy(val + currentvalpos, context, contextlen);
745 * disallow prohibited labels note that SSL3_RANDOM_SIZE > max(prohibited
746 * label len) = 15, so size of val > max(prohibited label len) = 15 and
747 * the comparisons won't have buffer overflow
749 if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST,
750 TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0)
752 if (memcmp(val, TLS_MD_SERVER_FINISH_CONST,
753 TLS_MD_SERVER_FINISH_CONST_SIZE) == 0)
755 if (memcmp(val, TLS_MD_MASTER_SECRET_CONST,
756 TLS_MD_MASTER_SECRET_CONST_SIZE) == 0)
758 if (memcmp(val, TLS_MD_EXTENDED_MASTER_SECRET_CONST,
759 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE) == 0)
761 if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST,
762 TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0)
771 s->session->master_key, s->session->master_key_length,
776 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
780 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE);
783 OPENSSL_clear_free(val, vallen);
787 int tls1_alert_code(int code)
790 case SSL_AD_CLOSE_NOTIFY:
791 return SSL3_AD_CLOSE_NOTIFY;
792 case SSL_AD_UNEXPECTED_MESSAGE:
793 return SSL3_AD_UNEXPECTED_MESSAGE;
794 case SSL_AD_BAD_RECORD_MAC:
795 return SSL3_AD_BAD_RECORD_MAC;
796 case SSL_AD_DECRYPTION_FAILED:
797 return TLS1_AD_DECRYPTION_FAILED;
798 case SSL_AD_RECORD_OVERFLOW:
799 return TLS1_AD_RECORD_OVERFLOW;
800 case SSL_AD_DECOMPRESSION_FAILURE:
801 return SSL3_AD_DECOMPRESSION_FAILURE;
802 case SSL_AD_HANDSHAKE_FAILURE:
803 return SSL3_AD_HANDSHAKE_FAILURE;
804 case SSL_AD_NO_CERTIFICATE:
806 case SSL_AD_BAD_CERTIFICATE:
807 return SSL3_AD_BAD_CERTIFICATE;
808 case SSL_AD_UNSUPPORTED_CERTIFICATE:
809 return SSL3_AD_UNSUPPORTED_CERTIFICATE;
810 case SSL_AD_CERTIFICATE_REVOKED:
811 return SSL3_AD_CERTIFICATE_REVOKED;
812 case SSL_AD_CERTIFICATE_EXPIRED:
813 return SSL3_AD_CERTIFICATE_EXPIRED;
814 case SSL_AD_CERTIFICATE_UNKNOWN:
815 return SSL3_AD_CERTIFICATE_UNKNOWN;
816 case SSL_AD_ILLEGAL_PARAMETER:
817 return SSL3_AD_ILLEGAL_PARAMETER;
818 case SSL_AD_UNKNOWN_CA:
819 return TLS1_AD_UNKNOWN_CA;
820 case SSL_AD_ACCESS_DENIED:
821 return TLS1_AD_ACCESS_DENIED;
822 case SSL_AD_DECODE_ERROR:
823 return TLS1_AD_DECODE_ERROR;
824 case SSL_AD_DECRYPT_ERROR:
825 return TLS1_AD_DECRYPT_ERROR;
826 case SSL_AD_EXPORT_RESTRICTION:
827 return TLS1_AD_EXPORT_RESTRICTION;
828 case SSL_AD_PROTOCOL_VERSION:
829 return TLS1_AD_PROTOCOL_VERSION;
830 case SSL_AD_INSUFFICIENT_SECURITY:
831 return TLS1_AD_INSUFFICIENT_SECURITY;
832 case SSL_AD_INTERNAL_ERROR:
833 return TLS1_AD_INTERNAL_ERROR;
834 case SSL_AD_USER_CANCELLED:
835 return TLS1_AD_USER_CANCELLED;
836 case SSL_AD_NO_RENEGOTIATION:
837 return TLS1_AD_NO_RENEGOTIATION;
838 case SSL_AD_UNSUPPORTED_EXTENSION:
839 return TLS1_AD_UNSUPPORTED_EXTENSION;
840 case SSL_AD_CERTIFICATE_UNOBTAINABLE:
841 return TLS1_AD_CERTIFICATE_UNOBTAINABLE;
842 case SSL_AD_UNRECOGNIZED_NAME:
843 return TLS1_AD_UNRECOGNIZED_NAME;
844 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
845 return TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
846 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
847 return TLS1_AD_BAD_CERTIFICATE_HASH_VALUE;
848 case SSL_AD_UNKNOWN_PSK_IDENTITY:
849 return TLS1_AD_UNKNOWN_PSK_IDENTITY;
850 case SSL_AD_INAPPROPRIATE_FALLBACK:
851 return TLS1_AD_INAPPROPRIATE_FALLBACK;
852 case SSL_AD_NO_APPLICATION_PROTOCOL:
853 return TLS1_AD_NO_APPLICATION_PROTOCOL;
854 case SSL_AD_CERTIFICATE_REQUIRED:
855 return SSL_AD_HANDSHAKE_FAILURE;