2 * Copyright 1995-2022 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_CONNECTION *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(SSL_CONNECTION_GET_CTX(s)->libctx,
49 OSSL_KDF_NAME_TLS1_PRF,
50 SSL_CONNECTION_GET_CTX(s)->propq);
53 kctx = EVP_KDF_CTX_new(kdf);
57 mdname = EVP_MD_get0_name(md);
58 *p++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST,
60 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SECRET,
63 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
64 (void *)seed1, (size_t)seed1_len);
65 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
66 (void *)seed2, (size_t)seed2_len);
67 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
68 (void *)seed3, (size_t)seed3_len);
69 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
70 (void *)seed4, (size_t)seed4_len);
71 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
72 (void *)seed5, (size_t)seed5_len);
73 *p = OSSL_PARAM_construct_end();
74 if (EVP_KDF_derive(kctx, out, olen, params)) {
75 EVP_KDF_CTX_free(kctx);
81 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
83 ERR_raise(ERR_LIB_SSL, ERR_R_INTERNAL_ERROR);
84 EVP_KDF_CTX_free(kctx);
88 static int tls1_generate_key_block(SSL_CONNECTION *s, unsigned char *km,
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 int tls_provider_set_tls_params(SSL_CONNECTION *s, EVP_CIPHER_CTX *ctx,
105 const EVP_CIPHER *ciph,
109 * Provided cipher, the TLS padding/MAC removal is performed provider
110 * side so we need to tell the ctx about our TLS version and mac size
112 OSSL_PARAM params[3], *pprm = params;
116 if ((EVP_CIPHER_get_flags(ciph) & EVP_CIPH_FLAG_AEAD_CIPHER) == 0
118 * We look at s->ext.use_etm instead of SSL_READ_ETM() or
119 * SSL_WRITE_ETM() because this test applies to both reading
123 imacsize = EVP_MD_get_size(md);
125 macsize = (size_t)imacsize;
127 *pprm++ = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_TLS_VERSION,
129 *pprm++ = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_TLS_MAC_SIZE,
131 *pprm = OSSL_PARAM_construct_end();
133 if (!EVP_CIPHER_CTX_set_params(ctx, params)) {
134 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
142 static int tls_iv_length_within_key_block(const EVP_CIPHER *c)
144 /* If GCM/CCM mode only part of IV comes from PRF */
145 if (EVP_CIPHER_get_mode(c) == EVP_CIPH_GCM_MODE)
146 return EVP_GCM_TLS_FIXED_IV_LEN;
147 else if (EVP_CIPHER_get_mode(c) == EVP_CIPH_CCM_MODE)
148 return EVP_CCM_TLS_FIXED_IV_LEN;
150 return EVP_CIPHER_get_iv_length(c);
153 int tls1_change_cipher_state(SSL_CONNECTION *s, int which)
155 unsigned char *p, *mac_secret;
156 unsigned char *key, *iv;
159 const SSL_COMP *comp = NULL;
162 size_t mac_secret_size;
165 size_t n, i, j, k, cl;
168 #ifndef OPENSSL_NO_KTLS
169 ktls_crypto_info_t crypto_info;
173 SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(s);
175 * Taglen is only relevant for CCM ciphersuites. Other ciphersuites
176 * ignore this value so we can default it to 0.
180 c = s->s3.tmp.new_sym_enc;
181 m = s->s3.tmp.new_hash;
182 mac_type = s->s3.tmp.new_mac_pkey_type;
183 #ifndef OPENSSL_NO_COMP
184 comp = s->s3.tmp.new_compression;
187 p = s->s3.tmp.key_block;
188 i = mac_secret_size = s->s3.tmp.new_mac_secret_size;
190 cl = EVP_CIPHER_get_key_length(c);
192 iivlen = tls_iv_length_within_key_block(c);
194 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
198 if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
199 (which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
200 mac_secret = &(p[0]);
208 mac_secret = &(p[n]);
216 if (n > s->s3.tmp.key_block_length) {
217 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
221 if (EVP_CIPHER_get_mode(c) == EVP_CIPH_CCM_MODE) {
222 if ((s->s3.tmp.new_cipher->algorithm_enc
223 & (SSL_AES128CCM8 | SSL_AES256CCM8)) != 0)
224 taglen = EVP_CCM8_TLS_TAG_LEN;
226 taglen = EVP_CCM_TLS_TAG_LEN;
229 if (which & SSL3_CC_READ) {
231 s->s3.flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
233 s->s3.flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
235 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
236 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
238 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
240 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_TLSTREE)
241 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_TLSTREE;
243 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_TLSTREE;
245 if (!ssl_set_new_record_layer(s, s->version,
246 OSSL_RECORD_DIRECTION_READ,
247 OSSL_RECORD_PROTECTION_LEVEL_APPLICATION,
248 key, cl, iv, (size_t)k, mac_secret,
249 mac_secret_size, c, taglen, mac_type,
251 /* SSLfatal already called */
255 /* TODO(RECLAYER): Temporary - remove me when write rlayer done*/
258 s->statem.enc_write_state = ENC_WRITE_STATE_INVALID;
260 s->s3.flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
262 s->s3.flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
264 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
265 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
267 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
269 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_TLSTREE)
270 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_TLSTREE;
272 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_TLSTREE;
274 if (!ssl_set_new_record_layer(s, s->version,
275 OSSL_RECORD_DIRECTION_WRITE,
276 OSSL_RECORD_PROTECTION_LEVEL_APPLICATION,
277 key, cl, iv, (size_t)k, mac_secret,
278 mac_secret_size, c, taglen, mac_type,
280 /* SSLfatal already called */
284 if (s->enc_write_ctx != NULL && !SSL_CONNECTION_IS_DTLS(s)) {
286 } else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL) {
287 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
290 dd = s->enc_write_ctx;
291 if (SSL_CONNECTION_IS_DTLS(s)) {
292 mac_ctx = EVP_MD_CTX_new();
293 if (mac_ctx == NULL) {
294 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
297 s->write_hash = mac_ctx;
299 mac_ctx = ssl_replace_hash(&s->write_hash, NULL);
300 if (mac_ctx == NULL) {
301 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
305 #ifndef OPENSSL_NO_COMP
306 COMP_CTX_free(s->compress);
309 s->compress = COMP_CTX_new(comp->method);
310 if (s->compress == NULL) {
311 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
312 SSL_R_COMPRESSION_LIBRARY_ERROR);
318 * this is done by dtls1_reset_seq_numbers for DTLS
320 if (!SSL_CONNECTION_IS_DTLS(s))
321 RECORD_LAYER_reset_write_sequence(&s->rlayer);
325 EVP_CIPHER_CTX_reset(dd);
327 if (!(EVP_CIPHER_get_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER)) {
328 if (mac_type == EVP_PKEY_HMAC) {
329 mac_key = EVP_PKEY_new_raw_private_key_ex(sctx->libctx, "HMAC",
330 sctx->propq, mac_secret,
334 * If its not HMAC then the only other types of MAC we support are
335 * the GOST MACs, so we need to use the old style way of creating
338 mac_key = EVP_PKEY_new_mac_key(mac_type, NULL, mac_secret,
339 (int)mac_secret_size);
342 || EVP_DigestSignInit_ex(mac_ctx, NULL, EVP_MD_get0_name(m),
343 sctx->libctx, sctx->propq, mac_key,
345 EVP_PKEY_free(mac_key);
346 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
349 EVP_PKEY_free(mac_key);
352 OSSL_TRACE_BEGIN(TLS) {
353 BIO_printf(trc_out, "which = %04X, mac key:\n", which);
354 BIO_dump_indent(trc_out, mac_secret, i, 4);
355 } OSSL_TRACE_END(TLS);
357 if (EVP_CIPHER_get_mode(c) == EVP_CIPH_GCM_MODE) {
358 if (!EVP_CipherInit_ex(dd, c, NULL, key, NULL, (which & SSL3_CC_WRITE))
359 || EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, (int)k,
361 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
364 } else if (EVP_CIPHER_get_mode(c) == EVP_CIPH_CCM_MODE) {
365 if (!EVP_CipherInit_ex(dd, c, NULL, NULL, NULL, (which & SSL3_CC_WRITE))
366 || (EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_IVLEN, 12, NULL) <= 0)
367 || (EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_TAG, taglen, NULL) <= 0)
368 || (EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_CCM_SET_IV_FIXED, (int)k, iv) <= 0)
369 || !EVP_CipherInit_ex(dd, NULL, NULL, key, NULL, -1)) {
370 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
374 if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE))) {
375 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
379 /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
380 if ((EVP_CIPHER_get_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER)
381 && mac_secret_size != 0
382 && EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_MAC_KEY,
383 (int)mac_secret_size, mac_secret) <= 0) {
384 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
387 if (EVP_CIPHER_get0_provider(c) != NULL
388 && !tls_provider_set_tls_params(s, dd, c, m)) {
389 /* SSLfatal already called */
393 #ifndef OPENSSL_NO_KTLS
394 if (s->compress || (s->options & SSL_OP_ENABLE_KTLS) == 0)
397 /* ktls supports only the maximum fragment size */
398 if (ssl_get_max_send_fragment(s) != SSL3_RT_MAX_PLAIN_LENGTH)
401 /* check that cipher is supported */
402 if (!ktls_check_supported_cipher(s, c, m, taglen))
405 if (which & SSL3_CC_WRITE)
410 if (!ossl_assert(bio != NULL)) {
411 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
415 /* All future data will get encrypted by ktls. Flush the BIO or skip ktls */
416 if (which & SSL3_CC_WRITE) {
417 if (BIO_flush(bio) <= 0)
421 /* ktls doesn't support renegotiation */
422 if ((BIO_get_ktls_send(s->wbio) && (which & SSL3_CC_WRITE)) ||
423 (BIO_get_ktls_recv(s->rbio) && (which & SSL3_CC_READ))) {
424 SSLfatal(s, SSL_AD_NO_RENEGOTIATION, ERR_R_INTERNAL_ERROR);
429 * If we get here we are only doing the write side. The read side goes
430 * through the new record layer code.
432 rl_sequence = RECORD_LAYER_get_write_sequence(&s->rlayer);
434 if (!ktls_configure_crypto(sctx->libctx, s->version, c, m, rl_sequence,
435 &crypto_info, which & SSL3_CC_WRITE, iv,
436 (size_t)k, key, cl, mac_secret, mac_secret_size))
439 /* ktls works with user provided buffers directly */
440 if (BIO_set_ktls(bio, &crypto_info, which & SSL3_CC_WRITE)) {
441 if (which & SSL3_CC_WRITE)
442 ssl3_release_write_buffer(s);
443 SSL_set_options(SSL_CONNECTION_GET_SSL(s), SSL_OP_NO_RENEGOTIATION);
446 #endif /* OPENSSL_NO_KTLS */
448 s->statem.enc_write_state = ENC_WRITE_STATE_VALID;
450 OSSL_TRACE_BEGIN(TLS) {
451 BIO_printf(trc_out, "which = %04X, key:\n", which);
452 BIO_dump_indent(trc_out, key, EVP_CIPHER_get_key_length(c), 4);
453 BIO_printf(trc_out, "iv:\n");
454 BIO_dump_indent(trc_out, iv, k, 4);
455 } OSSL_TRACE_END(TLS);
462 int tls1_setup_key_block(SSL_CONNECTION *s)
468 int mac_type = NID_undef;
469 size_t num, mac_secret_size = 0;
473 if (s->s3.tmp.key_block_length != 0)
476 if (!ssl_cipher_get_evp(SSL_CONNECTION_GET_CTX(s), s->session, &c, &hash,
477 &mac_type, &mac_secret_size, &comp,
479 /* Error is already recorded */
480 SSLfatal_alert(s, SSL_AD_INTERNAL_ERROR);
484 ssl_evp_cipher_free(s->s3.tmp.new_sym_enc);
485 s->s3.tmp.new_sym_enc = c;
486 ssl_evp_md_free(s->s3.tmp.new_hash);
487 s->s3.tmp.new_hash = hash;
488 s->s3.tmp.new_mac_pkey_type = mac_type;
489 s->s3.tmp.new_mac_secret_size = mac_secret_size;
490 ivlen = tls_iv_length_within_key_block(c);
492 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
495 num = mac_secret_size + EVP_CIPHER_get_key_length(c) + ivlen;
498 ssl3_cleanup_key_block(s);
500 if ((p = OPENSSL_malloc(num)) == NULL) {
501 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
505 s->s3.tmp.key_block_length = num;
506 s->s3.tmp.key_block = p;
508 OSSL_TRACE_BEGIN(TLS) {
509 BIO_printf(trc_out, "key block length: %zu\n", num);
510 BIO_printf(trc_out, "client random\n");
511 BIO_dump_indent(trc_out, s->s3.client_random, SSL3_RANDOM_SIZE, 4);
512 BIO_printf(trc_out, "server random\n");
513 BIO_dump_indent(trc_out, s->s3.server_random, SSL3_RANDOM_SIZE, 4);
514 BIO_printf(trc_out, "master key\n");
515 BIO_dump_indent(trc_out,
516 s->session->master_key,
517 s->session->master_key_length, 4);
518 } OSSL_TRACE_END(TLS);
520 if (!tls1_generate_key_block(s, p, num)) {
521 /* SSLfatal() already called */
525 OSSL_TRACE_BEGIN(TLS) {
526 BIO_printf(trc_out, "key block\n");
527 BIO_dump_indent(trc_out, p, num, 4);
528 } OSSL_TRACE_END(TLS);
530 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)
531 && SSL_CONNECTION_GET_SSL(s)->method->version <= TLS1_VERSION) {
533 * enable vulnerability countermeasure for CBC ciphers with known-IV
534 * problem (http://www.openssl.org/~bodo/tls-cbc.txt)
536 s->s3.need_empty_fragments = 1;
538 if (s->session->cipher != NULL) {
539 if (s->session->cipher->algorithm_enc == SSL_eNULL)
540 s->s3.need_empty_fragments = 0;
542 if (s->session->cipher->algorithm_enc == SSL_RC4)
543 s->s3.need_empty_fragments = 0;
552 size_t tls1_final_finish_mac(SSL_CONNECTION *s, const char *str,
553 size_t slen, unsigned char *out)
556 unsigned char hash[EVP_MAX_MD_SIZE];
557 size_t finished_size = TLS1_FINISH_MAC_LENGTH;
559 if (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kGOST18)
562 if (!ssl3_digest_cached_records(s, 0)) {
563 /* SSLfatal() already called */
567 if (!ssl_handshake_hash(s, hash, sizeof(hash), &hashlen)) {
568 /* SSLfatal() already called */
572 if (!tls1_PRF(s, str, slen, hash, hashlen, NULL, 0, NULL, 0, NULL, 0,
573 s->session->master_key, s->session->master_key_length,
574 out, finished_size, 1)) {
575 /* SSLfatal() already called */
578 OPENSSL_cleanse(hash, hashlen);
579 return finished_size;
582 int tls1_generate_master_secret(SSL_CONNECTION *s, unsigned char *out,
583 unsigned char *p, size_t len,
586 if (s->session->flags & SSL_SESS_FLAG_EXTMS) {
587 unsigned char hash[EVP_MAX_MD_SIZE * 2];
590 * Digest cached records keeping record buffer (if present): this won't
591 * affect client auth because we're freezing the buffer at the same
592 * point (after client key exchange and before certificate verify)
594 if (!ssl3_digest_cached_records(s, 1)
595 || !ssl_handshake_hash(s, hash, sizeof(hash), &hashlen)) {
596 /* SSLfatal() already called */
599 OSSL_TRACE_BEGIN(TLS) {
600 BIO_printf(trc_out, "Handshake hashes:\n");
601 BIO_dump(trc_out, (char *)hash, hashlen);
602 } OSSL_TRACE_END(TLS);
604 TLS_MD_EXTENDED_MASTER_SECRET_CONST,
605 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE,
609 NULL, 0, p, len, out,
610 SSL3_MASTER_SECRET_SIZE, 1)) {
611 /* SSLfatal() already called */
614 OPENSSL_cleanse(hash, hashlen);
617 TLS_MD_MASTER_SECRET_CONST,
618 TLS_MD_MASTER_SECRET_CONST_SIZE,
619 s->s3.client_random, SSL3_RANDOM_SIZE,
621 s->s3.server_random, SSL3_RANDOM_SIZE,
622 NULL, 0, p, len, out,
623 SSL3_MASTER_SECRET_SIZE, 1)) {
624 /* SSLfatal() already called */
629 OSSL_TRACE_BEGIN(TLS) {
630 BIO_printf(trc_out, "Premaster Secret:\n");
631 BIO_dump_indent(trc_out, p, len, 4);
632 BIO_printf(trc_out, "Client Random:\n");
633 BIO_dump_indent(trc_out, s->s3.client_random, SSL3_RANDOM_SIZE, 4);
634 BIO_printf(trc_out, "Server Random:\n");
635 BIO_dump_indent(trc_out, s->s3.server_random, SSL3_RANDOM_SIZE, 4);
636 BIO_printf(trc_out, "Master Secret:\n");
637 BIO_dump_indent(trc_out,
638 s->session->master_key,
639 SSL3_MASTER_SECRET_SIZE, 4);
640 } OSSL_TRACE_END(TLS);
642 *secret_size = SSL3_MASTER_SECRET_SIZE;
646 int tls1_export_keying_material(SSL_CONNECTION *s, unsigned char *out,
647 size_t olen, const char *label, size_t llen,
648 const unsigned char *context,
649 size_t contextlen, int use_context)
651 unsigned char *val = NULL;
652 size_t vallen = 0, currentvalpos;
656 * construct PRF arguments we construct the PRF argument ourself rather
657 * than passing separate values into the TLS PRF to ensure that the
658 * concatenation of values does not create a prohibited label.
660 vallen = llen + SSL3_RANDOM_SIZE * 2;
662 vallen += 2 + contextlen;
665 val = OPENSSL_malloc(vallen);
669 memcpy(val + currentvalpos, (unsigned char *)label, llen);
670 currentvalpos += llen;
671 memcpy(val + currentvalpos, s->s3.client_random, SSL3_RANDOM_SIZE);
672 currentvalpos += SSL3_RANDOM_SIZE;
673 memcpy(val + currentvalpos, s->s3.server_random, SSL3_RANDOM_SIZE);
674 currentvalpos += SSL3_RANDOM_SIZE;
677 val[currentvalpos] = (contextlen >> 8) & 0xff;
679 val[currentvalpos] = contextlen & 0xff;
681 if ((contextlen > 0) || (context != NULL)) {
682 memcpy(val + currentvalpos, context, contextlen);
687 * disallow prohibited labels note that SSL3_RANDOM_SIZE > max(prohibited
688 * label len) = 15, so size of val > max(prohibited label len) = 15 and
689 * the comparisons won't have buffer overflow
691 if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST,
692 TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0)
694 if (memcmp(val, TLS_MD_SERVER_FINISH_CONST,
695 TLS_MD_SERVER_FINISH_CONST_SIZE) == 0)
697 if (memcmp(val, TLS_MD_MASTER_SECRET_CONST,
698 TLS_MD_MASTER_SECRET_CONST_SIZE) == 0)
700 if (memcmp(val, TLS_MD_EXTENDED_MASTER_SECRET_CONST,
701 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE) == 0)
703 if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST,
704 TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0)
713 s->session->master_key, s->session->master_key_length,
718 ERR_raise(ERR_LIB_SSL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
722 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
725 OPENSSL_clear_free(val, vallen);
729 int tls1_alert_code(int code)
732 case SSL_AD_CLOSE_NOTIFY:
733 return SSL3_AD_CLOSE_NOTIFY;
734 case SSL_AD_UNEXPECTED_MESSAGE:
735 return SSL3_AD_UNEXPECTED_MESSAGE;
736 case SSL_AD_BAD_RECORD_MAC:
737 return SSL3_AD_BAD_RECORD_MAC;
738 case SSL_AD_DECRYPTION_FAILED:
739 return TLS1_AD_DECRYPTION_FAILED;
740 case SSL_AD_RECORD_OVERFLOW:
741 return TLS1_AD_RECORD_OVERFLOW;
742 case SSL_AD_DECOMPRESSION_FAILURE:
743 return SSL3_AD_DECOMPRESSION_FAILURE;
744 case SSL_AD_HANDSHAKE_FAILURE:
745 return SSL3_AD_HANDSHAKE_FAILURE;
746 case SSL_AD_NO_CERTIFICATE:
748 case SSL_AD_BAD_CERTIFICATE:
749 return SSL3_AD_BAD_CERTIFICATE;
750 case SSL_AD_UNSUPPORTED_CERTIFICATE:
751 return SSL3_AD_UNSUPPORTED_CERTIFICATE;
752 case SSL_AD_CERTIFICATE_REVOKED:
753 return SSL3_AD_CERTIFICATE_REVOKED;
754 case SSL_AD_CERTIFICATE_EXPIRED:
755 return SSL3_AD_CERTIFICATE_EXPIRED;
756 case SSL_AD_CERTIFICATE_UNKNOWN:
757 return SSL3_AD_CERTIFICATE_UNKNOWN;
758 case SSL_AD_ILLEGAL_PARAMETER:
759 return SSL3_AD_ILLEGAL_PARAMETER;
760 case SSL_AD_UNKNOWN_CA:
761 return TLS1_AD_UNKNOWN_CA;
762 case SSL_AD_ACCESS_DENIED:
763 return TLS1_AD_ACCESS_DENIED;
764 case SSL_AD_DECODE_ERROR:
765 return TLS1_AD_DECODE_ERROR;
766 case SSL_AD_DECRYPT_ERROR:
767 return TLS1_AD_DECRYPT_ERROR;
768 case SSL_AD_EXPORT_RESTRICTION:
769 return TLS1_AD_EXPORT_RESTRICTION;
770 case SSL_AD_PROTOCOL_VERSION:
771 return TLS1_AD_PROTOCOL_VERSION;
772 case SSL_AD_INSUFFICIENT_SECURITY:
773 return TLS1_AD_INSUFFICIENT_SECURITY;
774 case SSL_AD_INTERNAL_ERROR:
775 return TLS1_AD_INTERNAL_ERROR;
776 case SSL_AD_USER_CANCELLED:
777 return TLS1_AD_USER_CANCELLED;
778 case SSL_AD_NO_RENEGOTIATION:
779 return TLS1_AD_NO_RENEGOTIATION;
780 case SSL_AD_UNSUPPORTED_EXTENSION:
781 return TLS1_AD_UNSUPPORTED_EXTENSION;
782 case SSL_AD_CERTIFICATE_UNOBTAINABLE:
783 return TLS1_AD_CERTIFICATE_UNOBTAINABLE;
784 case SSL_AD_UNRECOGNIZED_NAME:
785 return TLS1_AD_UNRECOGNIZED_NAME;
786 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
787 return TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
788 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
789 return TLS1_AD_BAD_CERTIFICATE_HASH_VALUE;
790 case SSL_AD_UNKNOWN_PSK_IDENTITY:
791 return TLS1_AD_UNKNOWN_PSK_IDENTITY;
792 case SSL_AD_INAPPROPRIATE_FALLBACK:
793 return TLS1_AD_INAPPROPRIATE_FALLBACK;
794 case SSL_AD_NO_APPLICATION_PROTOCOL:
795 return TLS1_AD_NO_APPLICATION_PROTOCOL;
796 case SSL_AD_CERTIFICATE_REQUIRED:
797 return SSL_AD_HANDSHAKE_FAILURE;
798 case TLS13_AD_MISSING_EXTENSION:
799 return SSL_AD_HANDSHAKE_FAILURE;