2 * Copyright 1995-2018 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(NULL
, OSSL_KDF_NAME_TLS1_PRF
, NULL
);
52 kctx
= EVP_KDF_CTX_new(kdf
);
56 mdname
= EVP_MD_name(md
);
57 *p
++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST
,
58 (char *)mdname
, strlen(mdname
) + 1);
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(mac_ctx
, NULL
, m
, NULL
, mac_key
) <= 0) {
330 EVP_PKEY_free(mac_key
);
331 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
332 ERR_R_INTERNAL_ERROR
);
335 EVP_PKEY_free(mac_key
);
338 OSSL_TRACE_BEGIN(TLS
) {
339 BIO_printf(trc_out
, "which = %04X, mac key:\n", which
);
340 BIO_dump_indent(trc_out
, ms
, i
, 4);
341 } OSSL_TRACE_END(TLS
);
343 if (EVP_CIPHER_mode(c
) == EVP_CIPH_GCM_MODE
) {
344 if (!EVP_CipherInit_ex(dd
, c
, NULL
, key
, NULL
, (which
& SSL3_CC_WRITE
))
345 || !EVP_CIPHER_CTX_ctrl(dd
, EVP_CTRL_GCM_SET_IV_FIXED
, (int)k
,
347 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
348 ERR_R_INTERNAL_ERROR
);
351 } else if (EVP_CIPHER_mode(c
) == EVP_CIPH_CCM_MODE
) {
354 new_cipher
->algorithm_enc
& (SSL_AES128CCM8
| SSL_AES256CCM8
))
355 taglen
= EVP_CCM8_TLS_TAG_LEN
;
357 taglen
= EVP_CCM_TLS_TAG_LEN
;
358 if (!EVP_CipherInit_ex(dd
, c
, NULL
, NULL
, NULL
, (which
& SSL3_CC_WRITE
))
359 || !EVP_CIPHER_CTX_ctrl(dd
, EVP_CTRL_AEAD_SET_IVLEN
, 12, NULL
)
360 || !EVP_CIPHER_CTX_ctrl(dd
, EVP_CTRL_AEAD_SET_TAG
, taglen
, NULL
)
361 || !EVP_CIPHER_CTX_ctrl(dd
, EVP_CTRL_CCM_SET_IV_FIXED
, (int)k
, iv
)
362 || !EVP_CipherInit_ex(dd
, NULL
, NULL
, key
, NULL
, -1)) {
363 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
364 ERR_R_INTERNAL_ERROR
);
368 if (!EVP_CipherInit_ex(dd
, c
, NULL
, key
, iv
, (which
& SSL3_CC_WRITE
))) {
369 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
370 ERR_R_INTERNAL_ERROR
);
374 /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
375 if ((EVP_CIPHER_flags(c
) & EVP_CIPH_FLAG_AEAD_CIPHER
) && *mac_secret_size
376 && !EVP_CIPHER_CTX_ctrl(dd
, EVP_CTRL_AEAD_SET_MAC_KEY
,
377 (int)*mac_secret_size
, mac_secret
)) {
378 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
379 ERR_R_INTERNAL_ERROR
);
382 #ifndef OPENSSL_NO_KTLS
386 if (((which
& SSL3_CC_READ
) && (s
->mode
& SSL_MODE_NO_KTLS_RX
))
387 || ((which
& SSL3_CC_WRITE
) && (s
->mode
& SSL_MODE_NO_KTLS_TX
)))
390 /* ktls supports only the maximum fragment size */
391 if (ssl_get_max_send_fragment(s
) != SSL3_RT_MAX_PLAIN_LENGTH
)
395 memset(&crypto_info
, 0, sizeof(crypto_info
));
396 switch (s
->s3
.tmp
.new_cipher
->algorithm_enc
) {
399 crypto_info
.cipher_algorithm
= CRYPTO_AES_NIST_GCM_16
;
400 crypto_info
.iv_len
= EVP_GCM_TLS_FIXED_IV_LEN
;
406 switch (s
->s3
.tmp
.new_cipher
->algorithm_mac
) {
408 crypto_info
.auth_algorithm
= CRYPTO_SHA1_HMAC
;
411 crypto_info
.auth_algorithm
= CRYPTO_SHA2_256_HMAC
;
414 crypto_info
.auth_algorithm
= CRYPTO_SHA2_384_HMAC
;
419 crypto_info
.cipher_algorithm
= CRYPTO_AES_CBC
;
420 crypto_info
.iv_len
= EVP_CIPHER_iv_length(c
);
421 crypto_info
.auth_key
= ms
;
422 crypto_info
.auth_key_len
= *mac_secret_size
;
427 crypto_info
.cipher_key
= key
;
428 crypto_info
.cipher_key_len
= EVP_CIPHER_key_length(c
);
430 crypto_info
.tls_vmajor
= (s
->version
>> 8) & 0x000000ff;
431 crypto_info
.tls_vminor
= (s
->version
& 0x000000ff);
433 /* check that cipher is AES_GCM_128 */
434 if (EVP_CIPHER_nid(c
) != NID_aes_128_gcm
435 || EVP_CIPHER_mode(c
) != EVP_CIPH_GCM_MODE
436 || EVP_CIPHER_key_length(c
) != TLS_CIPHER_AES_GCM_128_KEY_SIZE
)
439 /* check version is 1.2 */
440 if (s
->version
!= TLS1_2_VERSION
)
444 if (which
& SSL3_CC_WRITE
)
449 if (!ossl_assert(bio
!= NULL
)) {
450 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
451 ERR_R_INTERNAL_ERROR
);
455 /* All future data will get encrypted by ktls. Flush the BIO or skip ktls */
456 if (which
& SSL3_CC_WRITE
) {
457 if (BIO_flush(bio
) <= 0)
461 /* ktls doesn't support renegotiation */
462 if ((BIO_get_ktls_send(s
->wbio
) && (which
& SSL3_CC_WRITE
)) ||
463 (BIO_get_ktls_recv(s
->rbio
) && (which
& SSL3_CC_READ
))) {
464 SSLfatal(s
, SSL_AD_NO_RENEGOTIATION
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
465 ERR_R_INTERNAL_ERROR
);
470 memset(&crypto_info
, 0, sizeof(crypto_info
));
471 crypto_info
.info
.cipher_type
= TLS_CIPHER_AES_GCM_128
;
472 crypto_info
.info
.version
= s
->version
;
474 EVP_CIPHER_CTX_ctrl(dd
, EVP_CTRL_GET_IV
,
475 EVP_GCM_TLS_FIXED_IV_LEN
+ EVP_GCM_TLS_EXPLICIT_IV_LEN
,
477 memcpy(crypto_info
.iv
, geniv
+ EVP_GCM_TLS_FIXED_IV_LEN
,
478 TLS_CIPHER_AES_GCM_128_IV_SIZE
);
479 memcpy(crypto_info
.salt
, geniv
, TLS_CIPHER_AES_GCM_128_SALT_SIZE
);
480 memcpy(crypto_info
.key
, key
, EVP_CIPHER_key_length(c
));
481 if (which
& SSL3_CC_WRITE
)
482 memcpy(crypto_info
.rec_seq
, &s
->rlayer
.write_sequence
,
483 TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE
);
485 memcpy(crypto_info
.rec_seq
, &s
->rlayer
.read_sequence
,
486 TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE
);
488 if (which
& SSL3_CC_READ
) {
489 count_unprocessed
= count_unprocessed_records(s
);
490 if (count_unprocessed
< 0)
493 /* increment the crypto_info record sequence */
494 while (count_unprocessed
) {
495 for (bit
= 7; bit
>= 0; bit
--) { /* increment */
496 ++crypto_info
.rec_seq
[bit
];
497 if (crypto_info
.rec_seq
[bit
] != 0)
505 /* ktls works with user provided buffers directly */
506 if (BIO_set_ktls(bio
, &crypto_info
, which
& SSL3_CC_WRITE
)) {
507 if (which
& SSL3_CC_WRITE
)
508 ssl3_release_write_buffer(s
);
509 SSL_set_options(s
, SSL_OP_NO_RENEGOTIATION
);
513 #endif /* OPENSSL_NO_KTLS */
514 s
->statem
.enc_write_state
= ENC_WRITE_STATE_VALID
;
516 OSSL_TRACE_BEGIN(TLS
) {
517 BIO_printf(trc_out
, "which = %04X, key:\n", which
);
518 BIO_dump_indent(trc_out
, key
, EVP_CIPHER_key_length(c
), 4);
519 BIO_printf(trc_out
, "iv:\n");
520 BIO_dump_indent(trc_out
, iv
, k
, 4);
521 } OSSL_TRACE_END(TLS
);
528 int tls1_setup_key_block(SSL
*s
)
534 int mac_type
= NID_undef
;
535 size_t num
, mac_secret_size
= 0;
538 if (s
->s3
.tmp
.key_block_length
!= 0)
541 if (!ssl_cipher_get_evp(s
->session
, &c
, &hash
, &mac_type
, &mac_secret_size
,
542 &comp
, s
->ext
.use_etm
)) {
543 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_SETUP_KEY_BLOCK
,
544 SSL_R_CIPHER_OR_HASH_UNAVAILABLE
);
548 s
->s3
.tmp
.new_sym_enc
= c
;
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
= EVP_CIPHER_key_length(c
) + mac_secret_size
+ EVP_CIPHER_iv_length(c
);
555 ssl3_cleanup_key_block(s
);
557 if ((p
= OPENSSL_malloc(num
)) == NULL
) {
558 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_SETUP_KEY_BLOCK
,
559 ERR_R_MALLOC_FAILURE
);
563 s
->s3
.tmp
.key_block_length
= num
;
564 s
->s3
.tmp
.key_block
= p
;
566 OSSL_TRACE_BEGIN(TLS
) {
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 #ifndef OPENSSL_NO_RC4
600 if (s
->session
->cipher
->algorithm_enc
== SSL_RC4
)
601 s
->s3
.need_empty_fragments
= 0;
611 size_t tls1_final_finish_mac(SSL
*s
, const char *str
, size_t slen
,
615 unsigned char hash
[EVP_MAX_MD_SIZE
];
617 if (!ssl3_digest_cached_records(s
, 0)) {
618 /* SSLfatal() already called */
622 if (!ssl_handshake_hash(s
, hash
, sizeof(hash
), &hashlen
)) {
623 /* SSLfatal() already called */
627 if (!tls1_PRF(s
, str
, slen
, hash
, hashlen
, NULL
, 0, NULL
, 0, NULL
, 0,
628 s
->session
->master_key
, s
->session
->master_key_length
,
629 out
, TLS1_FINISH_MAC_LENGTH
, 1)) {
630 /* SSLfatal() already called */
633 OPENSSL_cleanse(hash
, hashlen
);
634 return TLS1_FINISH_MAC_LENGTH
;
637 int tls1_generate_master_secret(SSL
*s
, unsigned char *out
, unsigned char *p
,
638 size_t len
, size_t *secret_size
)
640 if (s
->session
->flags
& SSL_SESS_FLAG_EXTMS
) {
641 unsigned char hash
[EVP_MAX_MD_SIZE
* 2];
644 * Digest cached records keeping record buffer (if present): this won't
645 * affect client auth because we're freezing the buffer at the same
646 * point (after client key exchange and before certificate verify)
648 if (!ssl3_digest_cached_records(s
, 1)
649 || !ssl_handshake_hash(s
, hash
, sizeof(hash
), &hashlen
)) {
650 /* SSLfatal() already called */
653 OSSL_TRACE_BEGIN(TLS
) {
654 BIO_printf(trc_out
, "Handshake hashes:\n");
655 BIO_dump(trc_out
, (char *)hash
, hashlen
);
656 } OSSL_TRACE_END(TLS
);
658 TLS_MD_EXTENDED_MASTER_SECRET_CONST
,
659 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE
,
663 NULL
, 0, p
, len
, out
,
664 SSL3_MASTER_SECRET_SIZE
, 1)) {
665 /* SSLfatal() already called */
668 OPENSSL_cleanse(hash
, hashlen
);
671 TLS_MD_MASTER_SECRET_CONST
,
672 TLS_MD_MASTER_SECRET_CONST_SIZE
,
673 s
->s3
.client_random
, SSL3_RANDOM_SIZE
,
675 s
->s3
.server_random
, SSL3_RANDOM_SIZE
,
676 NULL
, 0, p
, len
, out
,
677 SSL3_MASTER_SECRET_SIZE
, 1)) {
678 /* SSLfatal() already called */
683 OSSL_TRACE_BEGIN(TLS
) {
684 BIO_printf(trc_out
, "Premaster Secret:\n");
685 BIO_dump_indent(trc_out
, p
, len
, 4);
686 BIO_printf(trc_out
, "Client Random:\n");
687 BIO_dump_indent(trc_out
, s
->s3
.client_random
, SSL3_RANDOM_SIZE
, 4);
688 BIO_printf(trc_out
, "Server Random:\n");
689 BIO_dump_indent(trc_out
, s
->s3
.server_random
, SSL3_RANDOM_SIZE
, 4);
690 BIO_printf(trc_out
, "Master Secret:\n");
691 BIO_dump_indent(trc_out
,
692 s
->session
->master_key
,
693 SSL3_MASTER_SECRET_SIZE
, 4);
694 } OSSL_TRACE_END(TLS
);
696 *secret_size
= SSL3_MASTER_SECRET_SIZE
;
700 int tls1_export_keying_material(SSL
*s
, unsigned char *out
, size_t olen
,
701 const char *label
, size_t llen
,
702 const unsigned char *context
,
703 size_t contextlen
, int use_context
)
705 unsigned char *val
= NULL
;
706 size_t vallen
= 0, currentvalpos
;
710 * construct PRF arguments we construct the PRF argument ourself rather
711 * than passing separate values into the TLS PRF to ensure that the
712 * concatenation of values does not create a prohibited label.
714 vallen
= llen
+ SSL3_RANDOM_SIZE
* 2;
716 vallen
+= 2 + contextlen
;
719 val
= OPENSSL_malloc(vallen
);
723 memcpy(val
+ currentvalpos
, (unsigned char *)label
, llen
);
724 currentvalpos
+= llen
;
725 memcpy(val
+ currentvalpos
, s
->s3
.client_random
, SSL3_RANDOM_SIZE
);
726 currentvalpos
+= SSL3_RANDOM_SIZE
;
727 memcpy(val
+ currentvalpos
, s
->s3
.server_random
, SSL3_RANDOM_SIZE
);
728 currentvalpos
+= SSL3_RANDOM_SIZE
;
731 val
[currentvalpos
] = (contextlen
>> 8) & 0xff;
733 val
[currentvalpos
] = contextlen
& 0xff;
735 if ((contextlen
> 0) || (context
!= NULL
)) {
736 memcpy(val
+ currentvalpos
, context
, contextlen
);
741 * disallow prohibited labels note that SSL3_RANDOM_SIZE > max(prohibited
742 * label len) = 15, so size of val > max(prohibited label len) = 15 and
743 * the comparisons won't have buffer overflow
745 if (memcmp(val
, TLS_MD_CLIENT_FINISH_CONST
,
746 TLS_MD_CLIENT_FINISH_CONST_SIZE
) == 0)
748 if (memcmp(val
, TLS_MD_SERVER_FINISH_CONST
,
749 TLS_MD_SERVER_FINISH_CONST_SIZE
) == 0)
751 if (memcmp(val
, TLS_MD_MASTER_SECRET_CONST
,
752 TLS_MD_MASTER_SECRET_CONST_SIZE
) == 0)
754 if (memcmp(val
, TLS_MD_EXTENDED_MASTER_SECRET_CONST
,
755 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE
) == 0)
757 if (memcmp(val
, TLS_MD_KEY_EXPANSION_CONST
,
758 TLS_MD_KEY_EXPANSION_CONST_SIZE
) == 0)
767 s
->session
->master_key
, s
->session
->master_key_length
,
772 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL
, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL
);
776 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL
, ERR_R_MALLOC_FAILURE
);
779 OPENSSL_clear_free(val
, vallen
);
783 int tls1_alert_code(int code
)
786 case SSL_AD_CLOSE_NOTIFY
:
787 return SSL3_AD_CLOSE_NOTIFY
;
788 case SSL_AD_UNEXPECTED_MESSAGE
:
789 return SSL3_AD_UNEXPECTED_MESSAGE
;
790 case SSL_AD_BAD_RECORD_MAC
:
791 return SSL3_AD_BAD_RECORD_MAC
;
792 case SSL_AD_DECRYPTION_FAILED
:
793 return TLS1_AD_DECRYPTION_FAILED
;
794 case SSL_AD_RECORD_OVERFLOW
:
795 return TLS1_AD_RECORD_OVERFLOW
;
796 case SSL_AD_DECOMPRESSION_FAILURE
:
797 return SSL3_AD_DECOMPRESSION_FAILURE
;
798 case SSL_AD_HANDSHAKE_FAILURE
:
799 return SSL3_AD_HANDSHAKE_FAILURE
;
800 case SSL_AD_NO_CERTIFICATE
:
802 case SSL_AD_BAD_CERTIFICATE
:
803 return SSL3_AD_BAD_CERTIFICATE
;
804 case SSL_AD_UNSUPPORTED_CERTIFICATE
:
805 return SSL3_AD_UNSUPPORTED_CERTIFICATE
;
806 case SSL_AD_CERTIFICATE_REVOKED
:
807 return SSL3_AD_CERTIFICATE_REVOKED
;
808 case SSL_AD_CERTIFICATE_EXPIRED
:
809 return SSL3_AD_CERTIFICATE_EXPIRED
;
810 case SSL_AD_CERTIFICATE_UNKNOWN
:
811 return SSL3_AD_CERTIFICATE_UNKNOWN
;
812 case SSL_AD_ILLEGAL_PARAMETER
:
813 return SSL3_AD_ILLEGAL_PARAMETER
;
814 case SSL_AD_UNKNOWN_CA
:
815 return TLS1_AD_UNKNOWN_CA
;
816 case SSL_AD_ACCESS_DENIED
:
817 return TLS1_AD_ACCESS_DENIED
;
818 case SSL_AD_DECODE_ERROR
:
819 return TLS1_AD_DECODE_ERROR
;
820 case SSL_AD_DECRYPT_ERROR
:
821 return TLS1_AD_DECRYPT_ERROR
;
822 case SSL_AD_EXPORT_RESTRICTION
:
823 return TLS1_AD_EXPORT_RESTRICTION
;
824 case SSL_AD_PROTOCOL_VERSION
:
825 return TLS1_AD_PROTOCOL_VERSION
;
826 case SSL_AD_INSUFFICIENT_SECURITY
:
827 return TLS1_AD_INSUFFICIENT_SECURITY
;
828 case SSL_AD_INTERNAL_ERROR
:
829 return TLS1_AD_INTERNAL_ERROR
;
830 case SSL_AD_USER_CANCELLED
:
831 return TLS1_AD_USER_CANCELLED
;
832 case SSL_AD_NO_RENEGOTIATION
:
833 return TLS1_AD_NO_RENEGOTIATION
;
834 case SSL_AD_UNSUPPORTED_EXTENSION
:
835 return TLS1_AD_UNSUPPORTED_EXTENSION
;
836 case SSL_AD_CERTIFICATE_UNOBTAINABLE
:
837 return TLS1_AD_CERTIFICATE_UNOBTAINABLE
;
838 case SSL_AD_UNRECOGNIZED_NAME
:
839 return TLS1_AD_UNRECOGNIZED_NAME
;
840 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE
:
841 return TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE
;
842 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE
:
843 return TLS1_AD_BAD_CERTIFICATE_HASH_VALUE
;
844 case SSL_AD_UNKNOWN_PSK_IDENTITY
:
845 return TLS1_AD_UNKNOWN_PSK_IDENTITY
;
846 case SSL_AD_INAPPROPRIATE_FALLBACK
:
847 return TLS1_AD_INAPPROPRIATE_FALLBACK
;
848 case SSL_AD_NO_APPLICATION_PROTOCOL
:
849 return TLS1_AD_NO_APPLICATION_PROTOCOL
;
850 case SSL_AD_CERTIFICATE_REQUIRED
:
851 return SSL_AD_HANDSHAKE_FAILURE
;