691 lines
23 KiB
C
691 lines
23 KiB
C
/*
|
|
* Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
|
|
* Copyright 2005 Nokia. All rights reserved.
|
|
*
|
|
* Licensed under the OpenSSL license (the "License"). You may not use
|
|
* this file except in compliance with the License. You can obtain a copy
|
|
* in the file LICENSE in the source distribution or at
|
|
* https://www.openssl.org/source/license.html
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include "ssl_locl.h"
|
|
#include <openssl/comp.h>
|
|
#include <openssl/evp.h>
|
|
#include <openssl/kdf.h>
|
|
#include <openssl/rand.h>
|
|
|
|
/* seed1 through seed5 are concatenated */
|
|
static int tls1_PRF(SSL *s,
|
|
const void *seed1, size_t seed1_len,
|
|
const void *seed2, size_t seed2_len,
|
|
const void *seed3, size_t seed3_len,
|
|
const void *seed4, size_t seed4_len,
|
|
const void *seed5, size_t seed5_len,
|
|
const unsigned char *sec, size_t slen,
|
|
unsigned char *out, size_t olen, int fatal)
|
|
{
|
|
const EVP_MD *md = ssl_prf_md(s);
|
|
EVP_PKEY_CTX *pctx = NULL;
|
|
int ret = 0;
|
|
|
|
if (md == NULL) {
|
|
/* Should never happen */
|
|
if (fatal)
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_PRF,
|
|
ERR_R_INTERNAL_ERROR);
|
|
else
|
|
SSLerr(SSL_F_TLS1_PRF, ERR_R_INTERNAL_ERROR);
|
|
return 0;
|
|
}
|
|
pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_TLS1_PRF, NULL);
|
|
if (pctx == NULL || EVP_PKEY_derive_init(pctx) <= 0
|
|
|| EVP_PKEY_CTX_set_tls1_prf_md(pctx, md) <= 0
|
|
|| EVP_PKEY_CTX_set1_tls1_prf_secret(pctx, sec, (int)slen) <= 0
|
|
|| EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed1, (int)seed1_len) <= 0
|
|
|| EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed2, (int)seed2_len) <= 0
|
|
|| EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed3, (int)seed3_len) <= 0
|
|
|| EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed4, (int)seed4_len) <= 0
|
|
|| EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed5, (int)seed5_len) <= 0
|
|
|| EVP_PKEY_derive(pctx, out, &olen) <= 0) {
|
|
if (fatal)
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_PRF,
|
|
ERR_R_INTERNAL_ERROR);
|
|
else
|
|
SSLerr(SSL_F_TLS1_PRF, ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
ret = 1;
|
|
|
|
err:
|
|
EVP_PKEY_CTX_free(pctx);
|
|
return ret;
|
|
}
|
|
|
|
static int tls1_generate_key_block(SSL *s, unsigned char *km, size_t num)
|
|
{
|
|
int ret;
|
|
|
|
/* Calls SSLfatal() as required */
|
|
ret = tls1_PRF(s,
|
|
TLS_MD_KEY_EXPANSION_CONST,
|
|
TLS_MD_KEY_EXPANSION_CONST_SIZE, s->s3->server_random,
|
|
SSL3_RANDOM_SIZE, s->s3->client_random, SSL3_RANDOM_SIZE,
|
|
NULL, 0, NULL, 0, s->session->master_key,
|
|
s->session->master_key_length, km, num, 1);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int tls1_change_cipher_state(SSL *s, int which)
|
|
{
|
|
unsigned char *p, *mac_secret;
|
|
unsigned char tmp1[EVP_MAX_KEY_LENGTH];
|
|
unsigned char tmp2[EVP_MAX_KEY_LENGTH];
|
|
unsigned char iv1[EVP_MAX_IV_LENGTH * 2];
|
|
unsigned char iv2[EVP_MAX_IV_LENGTH * 2];
|
|
unsigned char *ms, *key, *iv;
|
|
EVP_CIPHER_CTX *dd;
|
|
const EVP_CIPHER *c;
|
|
#ifndef OPENSSL_NO_COMP
|
|
const SSL_COMP *comp;
|
|
#endif
|
|
const EVP_MD *m;
|
|
int mac_type;
|
|
size_t *mac_secret_size;
|
|
EVP_MD_CTX *mac_ctx;
|
|
EVP_PKEY *mac_key;
|
|
size_t n, i, j, k, cl;
|
|
int reuse_dd = 0;
|
|
|
|
c = s->s3->tmp.new_sym_enc;
|
|
m = s->s3->tmp.new_hash;
|
|
mac_type = s->s3->tmp.new_mac_pkey_type;
|
|
#ifndef OPENSSL_NO_COMP
|
|
comp = s->s3->tmp.new_compression;
|
|
#endif
|
|
|
|
if (which & SSL3_CC_READ) {
|
|
if (s->ext.use_etm)
|
|
s->s3->flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
|
|
else
|
|
s->s3->flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
|
|
|
|
if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
|
|
s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
|
|
else
|
|
s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
|
|
|
|
if (s->enc_read_ctx != NULL) {
|
|
reuse_dd = 1;
|
|
} else if ((s->enc_read_ctx = EVP_CIPHER_CTX_new()) == NULL) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
} else {
|
|
/*
|
|
* make sure it's initialised in case we exit later with an error
|
|
*/
|
|
EVP_CIPHER_CTX_reset(s->enc_read_ctx);
|
|
}
|
|
dd = s->enc_read_ctx;
|
|
mac_ctx = ssl_replace_hash(&s->read_hash, NULL);
|
|
if (mac_ctx == NULL)
|
|
goto err;
|
|
#ifndef OPENSSL_NO_COMP
|
|
COMP_CTX_free(s->expand);
|
|
s->expand = NULL;
|
|
if (comp != NULL) {
|
|
s->expand = COMP_CTX_new(comp->method);
|
|
if (s->expand == NULL) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR,
|
|
SSL_F_TLS1_CHANGE_CIPHER_STATE,
|
|
SSL_R_COMPRESSION_LIBRARY_ERROR);
|
|
goto err;
|
|
}
|
|
}
|
|
#endif
|
|
/*
|
|
* this is done by dtls1_reset_seq_numbers for DTLS
|
|
*/
|
|
if (!SSL_IS_DTLS(s))
|
|
RECORD_LAYER_reset_read_sequence(&s->rlayer);
|
|
mac_secret = &(s->s3->read_mac_secret[0]);
|
|
mac_secret_size = &(s->s3->read_mac_secret_size);
|
|
} else {
|
|
s->statem.enc_write_state = ENC_WRITE_STATE_INVALID;
|
|
if (s->ext.use_etm)
|
|
s->s3->flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
|
|
else
|
|
s->s3->flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
|
|
|
|
if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
|
|
s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
|
|
else
|
|
s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
|
|
if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s)) {
|
|
reuse_dd = 1;
|
|
} else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
dd = s->enc_write_ctx;
|
|
if (SSL_IS_DTLS(s)) {
|
|
mac_ctx = EVP_MD_CTX_new();
|
|
if (mac_ctx == NULL) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR,
|
|
SSL_F_TLS1_CHANGE_CIPHER_STATE,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
s->write_hash = mac_ctx;
|
|
} else {
|
|
mac_ctx = ssl_replace_hash(&s->write_hash, NULL);
|
|
if (mac_ctx == NULL) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR,
|
|
SSL_F_TLS1_CHANGE_CIPHER_STATE,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
}
|
|
#ifndef OPENSSL_NO_COMP
|
|
COMP_CTX_free(s->compress);
|
|
s->compress = NULL;
|
|
if (comp != NULL) {
|
|
s->compress = COMP_CTX_new(comp->method);
|
|
if (s->compress == NULL) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR,
|
|
SSL_F_TLS1_CHANGE_CIPHER_STATE,
|
|
SSL_R_COMPRESSION_LIBRARY_ERROR);
|
|
goto err;
|
|
}
|
|
}
|
|
#endif
|
|
/*
|
|
* this is done by dtls1_reset_seq_numbers for DTLS
|
|
*/
|
|
if (!SSL_IS_DTLS(s))
|
|
RECORD_LAYER_reset_write_sequence(&s->rlayer);
|
|
mac_secret = &(s->s3->write_mac_secret[0]);
|
|
mac_secret_size = &(s->s3->write_mac_secret_size);
|
|
}
|
|
|
|
if (reuse_dd)
|
|
EVP_CIPHER_CTX_reset(dd);
|
|
|
|
p = s->s3->tmp.key_block;
|
|
i = *mac_secret_size = s->s3->tmp.new_mac_secret_size;
|
|
|
|
/* TODO(size_t): convert me */
|
|
cl = EVP_CIPHER_key_length(c);
|
|
j = cl;
|
|
/* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
|
|
/* If GCM/CCM mode only part of IV comes from PRF */
|
|
if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
|
|
k = EVP_GCM_TLS_FIXED_IV_LEN;
|
|
else if (EVP_CIPHER_mode(c) == EVP_CIPH_CCM_MODE)
|
|
k = EVP_CCM_TLS_FIXED_IV_LEN;
|
|
else
|
|
k = EVP_CIPHER_iv_length(c);
|
|
if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
|
|
(which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
|
|
ms = &(p[0]);
|
|
n = i + i;
|
|
key = &(p[n]);
|
|
n += j + j;
|
|
iv = &(p[n]);
|
|
n += k + k;
|
|
} else {
|
|
n = i;
|
|
ms = &(p[n]);
|
|
n += i + j;
|
|
key = &(p[n]);
|
|
n += j + k;
|
|
iv = &(p[n]);
|
|
n += k;
|
|
}
|
|
|
|
if (n > s->s3->tmp.key_block_length) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
|
|
ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
memcpy(mac_secret, ms, i);
|
|
|
|
if (!(EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER)) {
|
|
/* TODO(size_t): Convert this function */
|
|
mac_key = EVP_PKEY_new_mac_key(mac_type, NULL, mac_secret,
|
|
(int)*mac_secret_size);
|
|
if (mac_key == NULL
|
|
|| EVP_DigestSignInit(mac_ctx, NULL, m, NULL, mac_key) <= 0) {
|
|
EVP_PKEY_free(mac_key);
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
|
|
ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
EVP_PKEY_free(mac_key);
|
|
}
|
|
#ifdef SSL_DEBUG
|
|
printf("which = %04X\nmac key=", which);
|
|
{
|
|
size_t z;
|
|
for (z = 0; z < i; z++)
|
|
printf("%02X%c", ms[z], ((z + 1) % 16) ? ' ' : '\n');
|
|
}
|
|
#endif
|
|
|
|
if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) {
|
|
if (!EVP_CipherInit_ex(dd, c, NULL, key, NULL, (which & SSL3_CC_WRITE))
|
|
|| !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, (int)k,
|
|
iv)) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
|
|
ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
} else if (EVP_CIPHER_mode(c) == EVP_CIPH_CCM_MODE) {
|
|
int taglen;
|
|
if (s->s3->tmp.
|
|
new_cipher->algorithm_enc & (SSL_AES128CCM8 | SSL_AES256CCM8))
|
|
taglen = EVP_CCM8_TLS_TAG_LEN;
|
|
else
|
|
taglen = EVP_CCM_TLS_TAG_LEN;
|
|
if (!EVP_CipherInit_ex(dd, c, NULL, NULL, NULL, (which & SSL3_CC_WRITE))
|
|
|| !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_IVLEN, 12, NULL)
|
|
|| !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_TAG, taglen, NULL)
|
|
|| !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_CCM_SET_IV_FIXED, (int)k, iv)
|
|
|| !EVP_CipherInit_ex(dd, NULL, NULL, key, NULL, -1)) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
|
|
ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
} else {
|
|
if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE))) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
|
|
ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
}
|
|
/* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
|
|
if ((EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size
|
|
&& !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_MAC_KEY,
|
|
(int)*mac_secret_size, mac_secret)) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
|
|
ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
s->statem.enc_write_state = ENC_WRITE_STATE_VALID;
|
|
|
|
#ifdef SSL_DEBUG
|
|
printf("which = %04X\nkey=", which);
|
|
{
|
|
int z;
|
|
for (z = 0; z < EVP_CIPHER_key_length(c); z++)
|
|
printf("%02X%c", key[z], ((z + 1) % 16) ? ' ' : '\n');
|
|
}
|
|
printf("\niv=");
|
|
{
|
|
size_t z;
|
|
for (z = 0; z < k; z++)
|
|
printf("%02X%c", iv[z], ((z + 1) % 16) ? ' ' : '\n');
|
|
}
|
|
printf("\n");
|
|
#endif
|
|
|
|
OPENSSL_cleanse(tmp1, sizeof(tmp1));
|
|
OPENSSL_cleanse(tmp2, sizeof(tmp1));
|
|
OPENSSL_cleanse(iv1, sizeof(iv1));
|
|
OPENSSL_cleanse(iv2, sizeof(iv2));
|
|
return 1;
|
|
err:
|
|
OPENSSL_cleanse(tmp1, sizeof(tmp1));
|
|
OPENSSL_cleanse(tmp2, sizeof(tmp1));
|
|
OPENSSL_cleanse(iv1, sizeof(iv1));
|
|
OPENSSL_cleanse(iv2, sizeof(iv2));
|
|
return 0;
|
|
}
|
|
|
|
int tls1_setup_key_block(SSL *s)
|
|
{
|
|
unsigned char *p;
|
|
const EVP_CIPHER *c;
|
|
const EVP_MD *hash;
|
|
SSL_COMP *comp;
|
|
int mac_type = NID_undef;
|
|
size_t num, mac_secret_size = 0;
|
|
int ret = 0;
|
|
|
|
if (s->s3->tmp.key_block_length != 0)
|
|
return 1;
|
|
|
|
if (!ssl_cipher_get_evp(s->session, &c, &hash, &mac_type, &mac_secret_size,
|
|
&comp, s->ext.use_etm)) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_SETUP_KEY_BLOCK,
|
|
SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
|
|
return 0;
|
|
}
|
|
|
|
s->s3->tmp.new_sym_enc = c;
|
|
s->s3->tmp.new_hash = hash;
|
|
s->s3->tmp.new_mac_pkey_type = mac_type;
|
|
s->s3->tmp.new_mac_secret_size = mac_secret_size;
|
|
num = EVP_CIPHER_key_length(c) + mac_secret_size + EVP_CIPHER_iv_length(c);
|
|
num *= 2;
|
|
|
|
ssl3_cleanup_key_block(s);
|
|
|
|
if ((p = OPENSSL_malloc(num)) == NULL) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_SETUP_KEY_BLOCK,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
s->s3->tmp.key_block_length = num;
|
|
s->s3->tmp.key_block = p;
|
|
|
|
#ifdef SSL_DEBUG
|
|
printf("client random\n");
|
|
{
|
|
int z;
|
|
for (z = 0; z < SSL3_RANDOM_SIZE; z++)
|
|
printf("%02X%c", s->s3->client_random[z],
|
|
((z + 1) % 16) ? ' ' : '\n');
|
|
}
|
|
printf("server random\n");
|
|
{
|
|
int z;
|
|
for (z = 0; z < SSL3_RANDOM_SIZE; z++)
|
|
printf("%02X%c", s->s3->server_random[z],
|
|
((z + 1) % 16) ? ' ' : '\n');
|
|
}
|
|
printf("master key\n");
|
|
{
|
|
size_t z;
|
|
for (z = 0; z < s->session->master_key_length; z++)
|
|
printf("%02X%c", s->session->master_key[z],
|
|
((z + 1) % 16) ? ' ' : '\n');
|
|
}
|
|
#endif
|
|
if (!tls1_generate_key_block(s, p, num)) {
|
|
/* SSLfatal() already called */
|
|
goto err;
|
|
}
|
|
#ifdef SSL_DEBUG
|
|
printf("\nkey block\n");
|
|
{
|
|
size_t z;
|
|
for (z = 0; z < num; z++)
|
|
printf("%02X%c", p[z], ((z + 1) % 16) ? ' ' : '\n');
|
|
}
|
|
#endif
|
|
|
|
if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)
|
|
&& s->method->version <= TLS1_VERSION) {
|
|
/*
|
|
* enable vulnerability countermeasure for CBC ciphers with known-IV
|
|
* problem (http://www.openssl.org/~bodo/tls-cbc.txt)
|
|
*/
|
|
s->s3->need_empty_fragments = 1;
|
|
|
|
if (s->session->cipher != NULL) {
|
|
if (s->session->cipher->algorithm_enc == SSL_eNULL)
|
|
s->s3->need_empty_fragments = 0;
|
|
|
|
#ifndef OPENSSL_NO_RC4
|
|
if (s->session->cipher->algorithm_enc == SSL_RC4)
|
|
s->s3->need_empty_fragments = 0;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
ret = 1;
|
|
err:
|
|
return ret;
|
|
}
|
|
|
|
size_t tls1_final_finish_mac(SSL *s, const char *str, size_t slen,
|
|
unsigned char *out)
|
|
{
|
|
size_t hashlen;
|
|
unsigned char hash[EVP_MAX_MD_SIZE];
|
|
|
|
if (!ssl3_digest_cached_records(s, 0)) {
|
|
/* SSLfatal() already called */
|
|
return 0;
|
|
}
|
|
|
|
if (!ssl_handshake_hash(s, hash, sizeof(hash), &hashlen)) {
|
|
/* SSLfatal() already called */
|
|
return 0;
|
|
}
|
|
|
|
if (!tls1_PRF(s, str, slen, hash, hashlen, NULL, 0, NULL, 0, NULL, 0,
|
|
s->session->master_key, s->session->master_key_length,
|
|
out, TLS1_FINISH_MAC_LENGTH, 1)) {
|
|
/* SSLfatal() already called */
|
|
return 0;
|
|
}
|
|
OPENSSL_cleanse(hash, hashlen);
|
|
return TLS1_FINISH_MAC_LENGTH;
|
|
}
|
|
|
|
int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
|
|
size_t len, size_t *secret_size)
|
|
{
|
|
if (s->session->flags & SSL_SESS_FLAG_EXTMS) {
|
|
unsigned char hash[EVP_MAX_MD_SIZE * 2];
|
|
size_t hashlen;
|
|
/*
|
|
* Digest cached records keeping record buffer (if present): this wont
|
|
* affect client auth because we're freezing the buffer at the same
|
|
* point (after client key exchange and before certificate verify)
|
|
*/
|
|
if (!ssl3_digest_cached_records(s, 1)
|
|
|| !ssl_handshake_hash(s, hash, sizeof(hash), &hashlen)) {
|
|
/* SSLfatal() already called */
|
|
return 0;
|
|
}
|
|
#ifdef SSL_DEBUG
|
|
fprintf(stderr, "Handshake hashes:\n");
|
|
BIO_dump_fp(stderr, (char *)hash, hashlen);
|
|
#endif
|
|
if (!tls1_PRF(s,
|
|
TLS_MD_EXTENDED_MASTER_SECRET_CONST,
|
|
TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE,
|
|
hash, hashlen,
|
|
NULL, 0,
|
|
NULL, 0,
|
|
NULL, 0, p, len, out,
|
|
SSL3_MASTER_SECRET_SIZE, 1)) {
|
|
/* SSLfatal() already called */
|
|
return 0;
|
|
}
|
|
OPENSSL_cleanse(hash, hashlen);
|
|
} else {
|
|
if (!tls1_PRF(s,
|
|
TLS_MD_MASTER_SECRET_CONST,
|
|
TLS_MD_MASTER_SECRET_CONST_SIZE,
|
|
s->s3->client_random, SSL3_RANDOM_SIZE,
|
|
NULL, 0,
|
|
s->s3->server_random, SSL3_RANDOM_SIZE,
|
|
NULL, 0, p, len, out,
|
|
SSL3_MASTER_SECRET_SIZE, 1)) {
|
|
/* SSLfatal() already called */
|
|
return 0;
|
|
}
|
|
}
|
|
#ifdef SSL_DEBUG
|
|
fprintf(stderr, "Premaster Secret:\n");
|
|
BIO_dump_fp(stderr, (char *)p, len);
|
|
fprintf(stderr, "Client Random:\n");
|
|
BIO_dump_fp(stderr, (char *)s->s3->client_random, SSL3_RANDOM_SIZE);
|
|
fprintf(stderr, "Server Random:\n");
|
|
BIO_dump_fp(stderr, (char *)s->s3->server_random, SSL3_RANDOM_SIZE);
|
|
fprintf(stderr, "Master Secret:\n");
|
|
BIO_dump_fp(stderr, (char *)s->session->master_key,
|
|
SSL3_MASTER_SECRET_SIZE);
|
|
#endif
|
|
|
|
*secret_size = SSL3_MASTER_SECRET_SIZE;
|
|
return 1;
|
|
}
|
|
|
|
int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
|
|
const char *label, size_t llen,
|
|
const unsigned char *context,
|
|
size_t contextlen, int use_context)
|
|
{
|
|
unsigned char *val = NULL;
|
|
size_t vallen = 0, currentvalpos;
|
|
int rv;
|
|
|
|
/*
|
|
* construct PRF arguments we construct the PRF argument ourself rather
|
|
* than passing separate values into the TLS PRF to ensure that the
|
|
* concatenation of values does not create a prohibited label.
|
|
*/
|
|
vallen = llen + SSL3_RANDOM_SIZE * 2;
|
|
if (use_context) {
|
|
vallen += 2 + contextlen;
|
|
}
|
|
|
|
val = OPENSSL_malloc(vallen);
|
|
if (val == NULL)
|
|
goto err2;
|
|
currentvalpos = 0;
|
|
memcpy(val + currentvalpos, (unsigned char *)label, llen);
|
|
currentvalpos += llen;
|
|
memcpy(val + currentvalpos, s->s3->client_random, SSL3_RANDOM_SIZE);
|
|
currentvalpos += SSL3_RANDOM_SIZE;
|
|
memcpy(val + currentvalpos, s->s3->server_random, SSL3_RANDOM_SIZE);
|
|
currentvalpos += SSL3_RANDOM_SIZE;
|
|
|
|
if (use_context) {
|
|
val[currentvalpos] = (contextlen >> 8) & 0xff;
|
|
currentvalpos++;
|
|
val[currentvalpos] = contextlen & 0xff;
|
|
currentvalpos++;
|
|
if ((contextlen > 0) || (context != NULL)) {
|
|
memcpy(val + currentvalpos, context, contextlen);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* disallow prohibited labels note that SSL3_RANDOM_SIZE > max(prohibited
|
|
* label len) = 15, so size of val > max(prohibited label len) = 15 and
|
|
* the comparisons won't have buffer overflow
|
|
*/
|
|
if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST,
|
|
TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0)
|
|
goto err1;
|
|
if (memcmp(val, TLS_MD_SERVER_FINISH_CONST,
|
|
TLS_MD_SERVER_FINISH_CONST_SIZE) == 0)
|
|
goto err1;
|
|
if (memcmp(val, TLS_MD_MASTER_SECRET_CONST,
|
|
TLS_MD_MASTER_SECRET_CONST_SIZE) == 0)
|
|
goto err1;
|
|
if (memcmp(val, TLS_MD_EXTENDED_MASTER_SECRET_CONST,
|
|
TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE) == 0)
|
|
goto err1;
|
|
if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST,
|
|
TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0)
|
|
goto err1;
|
|
|
|
rv = tls1_PRF(s,
|
|
val, vallen,
|
|
NULL, 0,
|
|
NULL, 0,
|
|
NULL, 0,
|
|
NULL, 0,
|
|
s->session->master_key, s->session->master_key_length,
|
|
out, olen, 0);
|
|
|
|
goto ret;
|
|
err1:
|
|
SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
|
|
rv = 0;
|
|
goto ret;
|
|
err2:
|
|
SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE);
|
|
rv = 0;
|
|
ret:
|
|
OPENSSL_clear_free(val, vallen);
|
|
return rv;
|
|
}
|
|
|
|
int tls1_alert_code(int code)
|
|
{
|
|
switch (code) {
|
|
case SSL_AD_CLOSE_NOTIFY:
|
|
return SSL3_AD_CLOSE_NOTIFY;
|
|
case SSL_AD_UNEXPECTED_MESSAGE:
|
|
return SSL3_AD_UNEXPECTED_MESSAGE;
|
|
case SSL_AD_BAD_RECORD_MAC:
|
|
return SSL3_AD_BAD_RECORD_MAC;
|
|
case SSL_AD_DECRYPTION_FAILED:
|
|
return TLS1_AD_DECRYPTION_FAILED;
|
|
case SSL_AD_RECORD_OVERFLOW:
|
|
return TLS1_AD_RECORD_OVERFLOW;
|
|
case SSL_AD_DECOMPRESSION_FAILURE:
|
|
return SSL3_AD_DECOMPRESSION_FAILURE;
|
|
case SSL_AD_HANDSHAKE_FAILURE:
|
|
return SSL3_AD_HANDSHAKE_FAILURE;
|
|
case SSL_AD_NO_CERTIFICATE:
|
|
return -1;
|
|
case SSL_AD_BAD_CERTIFICATE:
|
|
return SSL3_AD_BAD_CERTIFICATE;
|
|
case SSL_AD_UNSUPPORTED_CERTIFICATE:
|
|
return SSL3_AD_UNSUPPORTED_CERTIFICATE;
|
|
case SSL_AD_CERTIFICATE_REVOKED:
|
|
return SSL3_AD_CERTIFICATE_REVOKED;
|
|
case SSL_AD_CERTIFICATE_EXPIRED:
|
|
return SSL3_AD_CERTIFICATE_EXPIRED;
|
|
case SSL_AD_CERTIFICATE_UNKNOWN:
|
|
return SSL3_AD_CERTIFICATE_UNKNOWN;
|
|
case SSL_AD_ILLEGAL_PARAMETER:
|
|
return SSL3_AD_ILLEGAL_PARAMETER;
|
|
case SSL_AD_UNKNOWN_CA:
|
|
return TLS1_AD_UNKNOWN_CA;
|
|
case SSL_AD_ACCESS_DENIED:
|
|
return TLS1_AD_ACCESS_DENIED;
|
|
case SSL_AD_DECODE_ERROR:
|
|
return TLS1_AD_DECODE_ERROR;
|
|
case SSL_AD_DECRYPT_ERROR:
|
|
return TLS1_AD_DECRYPT_ERROR;
|
|
case SSL_AD_EXPORT_RESTRICTION:
|
|
return TLS1_AD_EXPORT_RESTRICTION;
|
|
case SSL_AD_PROTOCOL_VERSION:
|
|
return TLS1_AD_PROTOCOL_VERSION;
|
|
case SSL_AD_INSUFFICIENT_SECURITY:
|
|
return TLS1_AD_INSUFFICIENT_SECURITY;
|
|
case SSL_AD_INTERNAL_ERROR:
|
|
return TLS1_AD_INTERNAL_ERROR;
|
|
case SSL_AD_USER_CANCELLED:
|
|
return TLS1_AD_USER_CANCELLED;
|
|
case SSL_AD_NO_RENEGOTIATION:
|
|
return TLS1_AD_NO_RENEGOTIATION;
|
|
case SSL_AD_UNSUPPORTED_EXTENSION:
|
|
return TLS1_AD_UNSUPPORTED_EXTENSION;
|
|
case SSL_AD_CERTIFICATE_UNOBTAINABLE:
|
|
return TLS1_AD_CERTIFICATE_UNOBTAINABLE;
|
|
case SSL_AD_UNRECOGNIZED_NAME:
|
|
return TLS1_AD_UNRECOGNIZED_NAME;
|
|
case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
|
|
return TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
|
|
case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
|
|
return TLS1_AD_BAD_CERTIFICATE_HASH_VALUE;
|
|
case SSL_AD_UNKNOWN_PSK_IDENTITY:
|
|
return TLS1_AD_UNKNOWN_PSK_IDENTITY;
|
|
case SSL_AD_INAPPROPRIATE_FALLBACK:
|
|
return TLS1_AD_INAPPROPRIATE_FALLBACK;
|
|
case SSL_AD_NO_APPLICATION_PROTOCOL:
|
|
return TLS1_AD_NO_APPLICATION_PROTOCOL;
|
|
case SSL_AD_CERTIFICATE_REQUIRED:
|
|
return SSL_AD_HANDSHAKE_FAILURE;
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|