2 * Copyright 1995-2021 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, ERR_R_INTERNAL_ERROR);
45 ERR_raise(ERR_LIB_SSL, ERR_R_INTERNAL_ERROR);
48 kdf = EVP_KDF_fetch(s->ctx->libctx, OSSL_KDF_NAME_TLS1_PRF, s->ctx->propq);
51 kctx = EVP_KDF_CTX_new(kdf);
55 mdname = EVP_MD_name(md);
56 *p++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST,
58 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SECRET,
61 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
62 (void *)seed1, (size_t)seed1_len);
63 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
64 (void *)seed2, (size_t)seed2_len);
65 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
66 (void *)seed3, (size_t)seed3_len);
67 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
68 (void *)seed4, (size_t)seed4_len);
69 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
70 (void *)seed5, (size_t)seed5_len);
71 *p = OSSL_PARAM_construct_end();
72 if (EVP_KDF_derive(kctx, out, olen, params)) {
73 EVP_KDF_CTX_free(kctx);
79 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
81 ERR_raise(ERR_LIB_SSL, ERR_R_INTERNAL_ERROR);
82 EVP_KDF_CTX_free(kctx);
86 static int tls1_generate_key_block(SSL *s, unsigned char *km, size_t num)
90 /* Calls SSLfatal() as required */
92 TLS_MD_KEY_EXPANSION_CONST,
93 TLS_MD_KEY_EXPANSION_CONST_SIZE, s->s3.server_random,
94 SSL3_RANDOM_SIZE, s->s3.client_random, SSL3_RANDOM_SIZE,
95 NULL, 0, NULL, 0, s->session->master_key,
96 s->session->master_key_length, km, num, 1);
101 #ifndef OPENSSL_NO_KTLS
103 * Count the number of records that were not processed yet from record boundary.
105 * This function assumes that there are only fully formed records read in the
106 * record layer. If read_ahead is enabled, then this might be false and this
107 * function will fail.
109 # ifndef OPENSSL_NO_KTLS_RX
110 static int count_unprocessed_records(SSL *s)
112 SSL3_BUFFER *rbuf = RECORD_LAYER_get_rbuf(&s->rlayer);
116 if (!PACKET_buf_init(&pkt, rbuf->buf + rbuf->offset, rbuf->left))
119 while (PACKET_remaining(&pkt) > 0) {
120 /* Skip record type and version */
121 if (!PACKET_forward(&pkt, 3))
124 /* Read until next record */
125 if (PACKET_get_length_prefixed_2(&pkt, &subpkt))
137 int tls_provider_set_tls_params(SSL *s, EVP_CIPHER_CTX *ctx,
138 const EVP_CIPHER *ciph,
142 * Provided cipher, the TLS padding/MAC removal is performed provider
143 * side so we need to tell the ctx about our TLS version and mac size
145 OSSL_PARAM params[3], *pprm = params;
149 if ((EVP_CIPHER_flags(ciph) & EVP_CIPH_FLAG_AEAD_CIPHER) == 0
151 * We look at s->ext.use_etm instead of SSL_READ_ETM() or
152 * SSL_WRITE_ETM() because this test applies to both reading
156 imacsize = EVP_MD_size(md);
158 macsize = (size_t)imacsize;
160 *pprm++ = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_TLS_VERSION,
162 *pprm++ = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_TLS_MAC_SIZE,
164 *pprm = OSSL_PARAM_construct_end();
166 if (!EVP_CIPHER_CTX_set_params(ctx, params)) {
167 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
175 static int tls_iv_length_within_key_block(const EVP_CIPHER *c)
177 /* If GCM/CCM mode only part of IV comes from PRF */
178 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
179 return EVP_GCM_TLS_FIXED_IV_LEN;
180 else if (EVP_CIPHER_mode(c) == EVP_CIPH_CCM_MODE)
181 return EVP_CCM_TLS_FIXED_IV_LEN;
183 return EVP_CIPHER_iv_length(c);
186 int tls1_change_cipher_state(SSL *s, int which)
188 unsigned char *p, *mac_secret;
189 unsigned char *ms, *key, *iv;
192 #ifndef OPENSSL_NO_COMP
193 const SSL_COMP *comp;
197 size_t *mac_secret_size;
200 size_t n, i, j, k, cl;
202 #ifndef OPENSSL_NO_KTLS
203 ktls_crypto_info_t crypto_info;
204 unsigned char *rec_seq;
206 # ifndef OPENSSL_NO_KTLS_RX
207 int count_unprocessed;
213 c = s->s3.tmp.new_sym_enc;
214 m = s->s3.tmp.new_hash;
215 mac_type = s->s3.tmp.new_mac_pkey_type;
216 #ifndef OPENSSL_NO_COMP
217 comp = s->s3.tmp.new_compression;
220 if (which & SSL3_CC_READ) {
222 s->s3.flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
224 s->s3.flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
226 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
227 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
229 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
231 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_TLSTREE)
232 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_TLSTREE;
234 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_TLSTREE;
236 if (s->enc_read_ctx != NULL) {
238 } else if ((s->enc_read_ctx = EVP_CIPHER_CTX_new()) == NULL) {
239 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
243 * make sure it's initialised in case we exit later with an error
245 EVP_CIPHER_CTX_reset(s->enc_read_ctx);
247 dd = s->enc_read_ctx;
248 mac_ctx = ssl_replace_hash(&s->read_hash, NULL);
249 if (mac_ctx == NULL) {
250 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
253 #ifndef OPENSSL_NO_COMP
254 COMP_CTX_free(s->expand);
257 s->expand = COMP_CTX_new(comp->method);
258 if (s->expand == NULL) {
259 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
260 SSL_R_COMPRESSION_LIBRARY_ERROR);
266 * this is done by dtls1_reset_seq_numbers for DTLS
269 RECORD_LAYER_reset_read_sequence(&s->rlayer);
270 mac_secret = &(s->s3.read_mac_secret[0]);
271 mac_secret_size = &(s->s3.read_mac_secret_size);
273 s->statem.enc_write_state = ENC_WRITE_STATE_INVALID;
275 s->s3.flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
277 s->s3.flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
279 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
280 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
282 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
284 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_TLSTREE)
285 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_TLSTREE;
287 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_TLSTREE;
288 if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s)) {
290 } else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL) {
291 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
294 dd = s->enc_write_ctx;
295 if (SSL_IS_DTLS(s)) {
296 mac_ctx = EVP_MD_CTX_new();
297 if (mac_ctx == NULL) {
298 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
301 s->write_hash = mac_ctx;
303 mac_ctx = ssl_replace_hash(&s->write_hash, NULL);
304 if (mac_ctx == NULL) {
305 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
309 #ifndef OPENSSL_NO_COMP
310 COMP_CTX_free(s->compress);
313 s->compress = COMP_CTX_new(comp->method);
314 if (s->compress == NULL) {
315 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
316 SSL_R_COMPRESSION_LIBRARY_ERROR);
322 * this is done by dtls1_reset_seq_numbers for DTLS
325 RECORD_LAYER_reset_write_sequence(&s->rlayer);
326 mac_secret = &(s->s3.write_mac_secret[0]);
327 mac_secret_size = &(s->s3.write_mac_secret_size);
331 EVP_CIPHER_CTX_reset(dd);
333 p = s->s3.tmp.key_block;
334 i = *mac_secret_size = s->s3.tmp.new_mac_secret_size;
336 /* TODO(size_t): convert me */
337 cl = EVP_CIPHER_key_length(c);
339 k = tls_iv_length_within_key_block(c);
340 if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
341 (which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
358 if (n > s->s3.tmp.key_block_length) {
359 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
363 memcpy(mac_secret, ms, i);
365 if (!(EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER)) {
366 if (mac_type == EVP_PKEY_HMAC) {
367 mac_key = EVP_PKEY_new_raw_private_key_ex(s->ctx->libctx, "HMAC",
368 s->ctx->propq, mac_secret,
372 * If its not HMAC then the only other types of MAC we support are
373 * the GOST MACs, so we need to use the old style way of creating
376 mac_key = EVP_PKEY_new_mac_key(mac_type, NULL, mac_secret,
377 (int)*mac_secret_size);
380 || EVP_DigestSignInit_ex(mac_ctx, NULL, EVP_MD_name(m),
381 s->ctx->libctx, s->ctx->propq, mac_key) <= 0) {
382 EVP_PKEY_free(mac_key);
383 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
386 EVP_PKEY_free(mac_key);
389 OSSL_TRACE_BEGIN(TLS) {
390 BIO_printf(trc_out, "which = %04X, mac key:\n", which);
391 BIO_dump_indent(trc_out, ms, i, 4);
392 } OSSL_TRACE_END(TLS);
394 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) {
395 if (!EVP_CipherInit_ex(dd, c, NULL, key, NULL, (which & SSL3_CC_WRITE))
396 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, (int)k,
398 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
401 } else if (EVP_CIPHER_mode(c) == EVP_CIPH_CCM_MODE) {
404 new_cipher->algorithm_enc & (SSL_AES128CCM8 | SSL_AES256CCM8))
405 taglen = EVP_CCM8_TLS_TAG_LEN;
407 taglen = EVP_CCM_TLS_TAG_LEN;
408 if (!EVP_CipherInit_ex(dd, c, NULL, NULL, NULL, (which & SSL3_CC_WRITE))
409 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_IVLEN, 12, NULL)
410 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_TAG, taglen, NULL)
411 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_CCM_SET_IV_FIXED, (int)k, iv)
412 || !EVP_CipherInit_ex(dd, NULL, NULL, key, NULL, -1)) {
413 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
417 if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE))) {
418 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
422 /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
423 if ((EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size
424 && !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_MAC_KEY,
425 (int)*mac_secret_size, mac_secret)) {
426 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
429 if (EVP_CIPHER_provider(c) != NULL
430 && !tls_provider_set_tls_params(s, dd, c, m)) {
431 /* SSLfatal already called */
435 #ifndef OPENSSL_NO_KTLS
439 if (((which & SSL3_CC_READ) && (s->mode & SSL_MODE_NO_KTLS_RX))
440 || ((which & SSL3_CC_WRITE) && (s->mode & SSL_MODE_NO_KTLS_TX)))
443 /* ktls supports only the maximum fragment size */
444 if (ssl_get_max_send_fragment(s) != SSL3_RT_MAX_PLAIN_LENGTH)
447 /* check that cipher is supported */
448 if (!ktls_check_supported_cipher(s, c, dd))
451 if (which & SSL3_CC_WRITE)
456 if (!ossl_assert(bio != NULL)) {
457 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
461 /* All future data will get encrypted by ktls. Flush the BIO or skip ktls */
462 if (which & SSL3_CC_WRITE) {
463 if (BIO_flush(bio) <= 0)
467 /* ktls doesn't support renegotiation */
468 if ((BIO_get_ktls_send(s->wbio) && (which & SSL3_CC_WRITE)) ||
469 (BIO_get_ktls_recv(s->rbio) && (which & SSL3_CC_READ))) {
470 SSLfatal(s, SSL_AD_NO_RENEGOTIATION, ERR_R_INTERNAL_ERROR);
474 if (which & SSL3_CC_WRITE)
475 rl_sequence = RECORD_LAYER_get_write_sequence(&s->rlayer);
477 rl_sequence = RECORD_LAYER_get_read_sequence(&s->rlayer);
479 if (!ktls_configure_crypto(s, c, dd, rl_sequence, &crypto_info, &rec_seq,
480 iv, key, ms, *mac_secret_size))
483 if (which & SSL3_CC_READ) {
484 # ifndef OPENSSL_NO_KTLS_RX
485 count_unprocessed = count_unprocessed_records(s);
486 if (count_unprocessed < 0)
489 /* increment the crypto_info record sequence */
490 while (count_unprocessed) {
491 for (bit = 7; bit >= 0; bit--) { /* increment */
493 if (rec_seq[bit] != 0)
503 /* ktls works with user provided buffers directly */
504 if (BIO_set_ktls(bio, &crypto_info, which & SSL3_CC_WRITE)) {
505 if (which & SSL3_CC_WRITE)
506 ssl3_release_write_buffer(s);
507 SSL_set_options(s, SSL_OP_NO_RENEGOTIATION);
511 #endif /* OPENSSL_NO_KTLS */
512 s->statem.enc_write_state = ENC_WRITE_STATE_VALID;
514 OSSL_TRACE_BEGIN(TLS) {
515 BIO_printf(trc_out, "which = %04X, key:\n", which);
516 BIO_dump_indent(trc_out, key, EVP_CIPHER_key_length(c), 4);
517 BIO_printf(trc_out, "iv:\n");
518 BIO_dump_indent(trc_out, iv, k, 4);
519 } OSSL_TRACE_END(TLS);
526 int tls1_setup_key_block(SSL *s)
532 int mac_type = NID_undef;
533 size_t num, mac_secret_size = 0;
536 if (s->s3.tmp.key_block_length != 0)
539 if (!ssl_cipher_get_evp(s->ctx, s->session, &c, &hash, &mac_type,
540 &mac_secret_size, &comp, s->ext.use_etm)) {
541 /* Error is already recorded */
542 SSLfatal_alert(s, SSL_AD_INTERNAL_ERROR);
546 ssl_evp_cipher_free(s->s3.tmp.new_sym_enc);
547 s->s3.tmp.new_sym_enc = c;
548 ssl_evp_md_free(s->s3.tmp.new_hash);
549 s->s3.tmp.new_hash = hash;
550 s->s3.tmp.new_mac_pkey_type = mac_type;
551 s->s3.tmp.new_mac_secret_size = mac_secret_size;
552 num = mac_secret_size + EVP_CIPHER_key_length(c) + tls_iv_length_within_key_block(c);
555 ssl3_cleanup_key_block(s);
557 if ((p = OPENSSL_malloc(num)) == NULL) {
558 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
562 s->s3.tmp.key_block_length = num;
563 s->s3.tmp.key_block = p;
565 OSSL_TRACE_BEGIN(TLS) {
566 BIO_printf(trc_out, "key block length: %ld\n", num);
567 BIO_printf(trc_out, "client random\n");
568 BIO_dump_indent(trc_out, s->s3.client_random, SSL3_RANDOM_SIZE, 4);
569 BIO_printf(trc_out, "server random\n");
570 BIO_dump_indent(trc_out, s->s3.server_random, SSL3_RANDOM_SIZE, 4);
571 BIO_printf(trc_out, "master key\n");
572 BIO_dump_indent(trc_out,
573 s->session->master_key,
574 s->session->master_key_length, 4);
575 } OSSL_TRACE_END(TLS);
577 if (!tls1_generate_key_block(s, p, num)) {
578 /* SSLfatal() already called */
582 OSSL_TRACE_BEGIN(TLS) {
583 BIO_printf(trc_out, "key block\n");
584 BIO_dump_indent(trc_out, p, num, 4);
585 } OSSL_TRACE_END(TLS);
587 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)
588 && s->method->version <= TLS1_VERSION) {
590 * enable vulnerability countermeasure for CBC ciphers with known-IV
591 * problem (http://www.openssl.org/~bodo/tls-cbc.txt)
593 s->s3.need_empty_fragments = 1;
595 if (s->session->cipher != NULL) {
596 if (s->session->cipher->algorithm_enc == SSL_eNULL)
597 s->s3.need_empty_fragments = 0;
599 if (s->session->cipher->algorithm_enc == SSL_RC4)
600 s->s3.need_empty_fragments = 0;
609 size_t tls1_final_finish_mac(SSL *s, const char *str, size_t slen,
613 unsigned char hash[EVP_MAX_MD_SIZE];
614 size_t finished_size = TLS1_FINISH_MAC_LENGTH;
616 if (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kGOST18)
619 if (!ssl3_digest_cached_records(s, 0)) {
620 /* SSLfatal() already called */
624 if (!ssl_handshake_hash(s, hash, sizeof(hash), &hashlen)) {
625 /* SSLfatal() already called */
629 if (!tls1_PRF(s, str, slen, hash, hashlen, NULL, 0, NULL, 0, NULL, 0,
630 s->session->master_key, s->session->master_key_length,
631 out, finished_size, 1)) {
632 /* SSLfatal() already called */
635 OPENSSL_cleanse(hash, hashlen);
636 return finished_size;
639 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
640 size_t len, size_t *secret_size)
642 if (s->session->flags & SSL_SESS_FLAG_EXTMS) {
643 unsigned char hash[EVP_MAX_MD_SIZE * 2];
646 * Digest cached records keeping record buffer (if present): this won't
647 * affect client auth because we're freezing the buffer at the same
648 * point (after client key exchange and before certificate verify)
650 if (!ssl3_digest_cached_records(s, 1)
651 || !ssl_handshake_hash(s, hash, sizeof(hash), &hashlen)) {
652 /* SSLfatal() already called */
655 OSSL_TRACE_BEGIN(TLS) {
656 BIO_printf(trc_out, "Handshake hashes:\n");
657 BIO_dump(trc_out, (char *)hash, hashlen);
658 } OSSL_TRACE_END(TLS);
660 TLS_MD_EXTENDED_MASTER_SECRET_CONST,
661 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE,
665 NULL, 0, p, len, out,
666 SSL3_MASTER_SECRET_SIZE, 1)) {
667 /* SSLfatal() already called */
670 OPENSSL_cleanse(hash, hashlen);
673 TLS_MD_MASTER_SECRET_CONST,
674 TLS_MD_MASTER_SECRET_CONST_SIZE,
675 s->s3.client_random, SSL3_RANDOM_SIZE,
677 s->s3.server_random, SSL3_RANDOM_SIZE,
678 NULL, 0, p, len, out,
679 SSL3_MASTER_SECRET_SIZE, 1)) {
680 /* SSLfatal() already called */
685 OSSL_TRACE_BEGIN(TLS) {
686 BIO_printf(trc_out, "Premaster Secret:\n");
687 BIO_dump_indent(trc_out, p, len, 4);
688 BIO_printf(trc_out, "Client Random:\n");
689 BIO_dump_indent(trc_out, s->s3.client_random, SSL3_RANDOM_SIZE, 4);
690 BIO_printf(trc_out, "Server Random:\n");
691 BIO_dump_indent(trc_out, s->s3.server_random, SSL3_RANDOM_SIZE, 4);
692 BIO_printf(trc_out, "Master Secret:\n");
693 BIO_dump_indent(trc_out,
694 s->session->master_key,
695 SSL3_MASTER_SECRET_SIZE, 4);
696 } OSSL_TRACE_END(TLS);
698 *secret_size = SSL3_MASTER_SECRET_SIZE;
702 int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
703 const char *label, size_t llen,
704 const unsigned char *context,
705 size_t contextlen, int use_context)
707 unsigned char *val = NULL;
708 size_t vallen = 0, currentvalpos;
712 * construct PRF arguments we construct the PRF argument ourself rather
713 * than passing separate values into the TLS PRF to ensure that the
714 * concatenation of values does not create a prohibited label.
716 vallen = llen + SSL3_RANDOM_SIZE * 2;
718 vallen += 2 + contextlen;
721 val = OPENSSL_malloc(vallen);
725 memcpy(val + currentvalpos, (unsigned char *)label, llen);
726 currentvalpos += llen;
727 memcpy(val + currentvalpos, s->s3.client_random, SSL3_RANDOM_SIZE);
728 currentvalpos += SSL3_RANDOM_SIZE;
729 memcpy(val + currentvalpos, s->s3.server_random, SSL3_RANDOM_SIZE);
730 currentvalpos += SSL3_RANDOM_SIZE;
733 val[currentvalpos] = (contextlen >> 8) & 0xff;
735 val[currentvalpos] = contextlen & 0xff;
737 if ((contextlen > 0) || (context != NULL)) {
738 memcpy(val + currentvalpos, context, contextlen);
743 * disallow prohibited labels note that SSL3_RANDOM_SIZE > max(prohibited
744 * label len) = 15, so size of val > max(prohibited label len) = 15 and
745 * the comparisons won't have buffer overflow
747 if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST,
748 TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0)
750 if (memcmp(val, TLS_MD_SERVER_FINISH_CONST,
751 TLS_MD_SERVER_FINISH_CONST_SIZE) == 0)
753 if (memcmp(val, TLS_MD_MASTER_SECRET_CONST,
754 TLS_MD_MASTER_SECRET_CONST_SIZE) == 0)
756 if (memcmp(val, TLS_MD_EXTENDED_MASTER_SECRET_CONST,
757 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE) == 0)
759 if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST,
760 TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0)
769 s->session->master_key, s->session->master_key_length,
774 ERR_raise(ERR_LIB_SSL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
778 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
781 OPENSSL_clear_free(val, vallen);
785 int tls1_alert_code(int code)
788 case SSL_AD_CLOSE_NOTIFY:
789 return SSL3_AD_CLOSE_NOTIFY;
790 case SSL_AD_UNEXPECTED_MESSAGE:
791 return SSL3_AD_UNEXPECTED_MESSAGE;
792 case SSL_AD_BAD_RECORD_MAC:
793 return SSL3_AD_BAD_RECORD_MAC;
794 case SSL_AD_DECRYPTION_FAILED:
795 return TLS1_AD_DECRYPTION_FAILED;
796 case SSL_AD_RECORD_OVERFLOW:
797 return TLS1_AD_RECORD_OVERFLOW;
798 case SSL_AD_DECOMPRESSION_FAILURE:
799 return SSL3_AD_DECOMPRESSION_FAILURE;
800 case SSL_AD_HANDSHAKE_FAILURE:
801 return SSL3_AD_HANDSHAKE_FAILURE;
802 case SSL_AD_NO_CERTIFICATE:
804 case SSL_AD_BAD_CERTIFICATE:
805 return SSL3_AD_BAD_CERTIFICATE;
806 case SSL_AD_UNSUPPORTED_CERTIFICATE:
807 return SSL3_AD_UNSUPPORTED_CERTIFICATE;
808 case SSL_AD_CERTIFICATE_REVOKED:
809 return SSL3_AD_CERTIFICATE_REVOKED;
810 case SSL_AD_CERTIFICATE_EXPIRED:
811 return SSL3_AD_CERTIFICATE_EXPIRED;
812 case SSL_AD_CERTIFICATE_UNKNOWN:
813 return SSL3_AD_CERTIFICATE_UNKNOWN;
814 case SSL_AD_ILLEGAL_PARAMETER:
815 return SSL3_AD_ILLEGAL_PARAMETER;
816 case SSL_AD_UNKNOWN_CA:
817 return TLS1_AD_UNKNOWN_CA;
818 case SSL_AD_ACCESS_DENIED:
819 return TLS1_AD_ACCESS_DENIED;
820 case SSL_AD_DECODE_ERROR:
821 return TLS1_AD_DECODE_ERROR;
822 case SSL_AD_DECRYPT_ERROR:
823 return TLS1_AD_DECRYPT_ERROR;
824 case SSL_AD_EXPORT_RESTRICTION:
825 return TLS1_AD_EXPORT_RESTRICTION;
826 case SSL_AD_PROTOCOL_VERSION:
827 return TLS1_AD_PROTOCOL_VERSION;
828 case SSL_AD_INSUFFICIENT_SECURITY:
829 return TLS1_AD_INSUFFICIENT_SECURITY;
830 case SSL_AD_INTERNAL_ERROR:
831 return TLS1_AD_INTERNAL_ERROR;
832 case SSL_AD_USER_CANCELLED:
833 return TLS1_AD_USER_CANCELLED;
834 case SSL_AD_NO_RENEGOTIATION:
835 return TLS1_AD_NO_RENEGOTIATION;
836 case SSL_AD_UNSUPPORTED_EXTENSION:
837 return TLS1_AD_UNSUPPORTED_EXTENSION;
838 case SSL_AD_CERTIFICATE_UNOBTAINABLE:
839 return TLS1_AD_CERTIFICATE_UNOBTAINABLE;
840 case SSL_AD_UNRECOGNIZED_NAME:
841 return TLS1_AD_UNRECOGNIZED_NAME;
842 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
843 return TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
844 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
845 return TLS1_AD_BAD_CERTIFICATE_HASH_VALUE;
846 case SSL_AD_UNKNOWN_PSK_IDENTITY:
847 return TLS1_AD_UNKNOWN_PSK_IDENTITY;
848 case SSL_AD_INAPPROPRIATE_FALLBACK:
849 return TLS1_AD_INAPPROPRIATE_FALLBACK;
850 case SSL_AD_NO_APPLICATION_PROTOCOL:
851 return TLS1_AD_NO_APPLICATION_PROTOCOL;
852 case SSL_AD_CERTIFICATE_REQUIRED:
853 return SSL_AD_HANDSHAKE_FAILURE;