pineapple-src/externals/libressl/ssl/t1_enc.c
2022-04-24 22:29:35 +02:00

495 lines
16 KiB
C
Executable file

/* $OpenBSD: t1_enc.c,v 1.154 2022/02/05 14:54:10 jsing Exp $ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
/* ====================================================================
* Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* openssl-core@openssl.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
/* ====================================================================
* Copyright 2005 Nokia. All rights reserved.
*
* The portions of the attached software ("Contribution") is developed by
* Nokia Corporation and is licensed pursuant to the OpenSSL open source
* license.
*
* The Contribution, originally written by Mika Kousa and Pasi Eronen of
* Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
* support (see RFC 4279) to OpenSSL.
*
* No patent licenses or other rights except those expressly stated in
* the OpenSSL open source license shall be deemed granted or received
* expressly, by implication, estoppel, or otherwise.
*
* No assurances are provided by Nokia that the Contribution does not
* infringe the patent or other intellectual property rights of any third
* party or that the license provides you with all the necessary rights
* to make use of the Contribution.
*
* THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
* ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
* SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
* OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
* OTHERWISE.
*/
#include <limits.h>
#include <stdio.h>
#include <openssl/evp.h>
#include <openssl/hmac.h>
#include <openssl/md5.h>
#include <openssl/opensslconf.h>
#include "dtls_locl.h"
#include "ssl_locl.h"
void
tls1_cleanup_key_block(SSL *s)
{
tls12_key_block_free(s->s3->hs.tls12.key_block);
s->s3->hs.tls12.key_block = NULL;
}
/*
* TLS P_hash() data expansion function - see RFC 5246, section 5.
*/
static int
tls1_P_hash(const EVP_MD *md, const unsigned char *secret, size_t secret_len,
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, unsigned char *out, size_t out_len)
{
unsigned char A1[EVP_MAX_MD_SIZE], hmac[EVP_MAX_MD_SIZE];
size_t A1_len, hmac_len;
EVP_MD_CTX *ctx = NULL;
EVP_PKEY *mac_key = NULL;
int ret = 0;
int chunk;
size_t i;
chunk = EVP_MD_size(md);
OPENSSL_assert(chunk >= 0);
if ((ctx = EVP_MD_CTX_new()) == NULL)
goto err;
mac_key = EVP_PKEY_new_mac_key(EVP_PKEY_HMAC, NULL, secret, secret_len);
if (mac_key == NULL)
goto err;
if (!EVP_DigestSignInit(ctx, NULL, md, NULL, mac_key))
goto err;
if (seed1 && !EVP_DigestSignUpdate(ctx, seed1, seed1_len))
goto err;
if (seed2 && !EVP_DigestSignUpdate(ctx, seed2, seed2_len))
goto err;
if (seed3 && !EVP_DigestSignUpdate(ctx, seed3, seed3_len))
goto err;
if (seed4 && !EVP_DigestSignUpdate(ctx, seed4, seed4_len))
goto err;
if (seed5 && !EVP_DigestSignUpdate(ctx, seed5, seed5_len))
goto err;
if (!EVP_DigestSignFinal(ctx, A1, &A1_len))
goto err;
for (;;) {
if (!EVP_DigestSignInit(ctx, NULL, md, NULL, mac_key))
goto err;
if (!EVP_DigestSignUpdate(ctx, A1, A1_len))
goto err;
if (seed1 && !EVP_DigestSignUpdate(ctx, seed1, seed1_len))
goto err;
if (seed2 && !EVP_DigestSignUpdate(ctx, seed2, seed2_len))
goto err;
if (seed3 && !EVP_DigestSignUpdate(ctx, seed3, seed3_len))
goto err;
if (seed4 && !EVP_DigestSignUpdate(ctx, seed4, seed4_len))
goto err;
if (seed5 && !EVP_DigestSignUpdate(ctx, seed5, seed5_len))
goto err;
if (!EVP_DigestSignFinal(ctx, hmac, &hmac_len))
goto err;
if (hmac_len > out_len)
hmac_len = out_len;
for (i = 0; i < hmac_len; i++)
out[i] ^= hmac[i];
out += hmac_len;
out_len -= hmac_len;
if (out_len == 0)
break;
if (!EVP_DigestSignInit(ctx, NULL, md, NULL, mac_key))
goto err;
if (!EVP_DigestSignUpdate(ctx, A1, A1_len))
goto err;
if (!EVP_DigestSignFinal(ctx, A1, &A1_len))
goto err;
}
ret = 1;
err:
EVP_PKEY_free(mac_key);
EVP_MD_CTX_free(ctx);
explicit_bzero(A1, sizeof(A1));
explicit_bzero(hmac, sizeof(hmac));
return ret;
}
int
tls1_PRF(SSL *s, const unsigned char *secret, size_t secret_len,
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, unsigned char *out, size_t out_len)
{
const EVP_MD *md;
size_t half_len;
memset(out, 0, out_len);
if (!ssl_get_handshake_evp_md(s, &md))
return (0);
if (EVP_MD_type(md) == NID_md5_sha1) {
/*
* Partition secret between MD5 and SHA1, then XOR result.
* If the secret length is odd, a one byte overlap is used.
*/
half_len = secret_len - (secret_len / 2);
if (!tls1_P_hash(EVP_md5(), secret, half_len, seed1, seed1_len,
seed2, seed2_len, seed3, seed3_len, seed4, seed4_len,
seed5, seed5_len, out, out_len))
return (0);
secret += secret_len - half_len;
if (!tls1_P_hash(EVP_sha1(), secret, half_len, seed1, seed1_len,
seed2, seed2_len, seed3, seed3_len, seed4, seed4_len,
seed5, seed5_len, out, out_len))
return (0);
return (1);
}
if (!tls1_P_hash(md, secret, secret_len, seed1, seed1_len,
seed2, seed2_len, seed3, seed3_len, seed4, seed4_len,
seed5, seed5_len, out, out_len))
return (0);
return (1);
}
int
tls1_generate_key_block(SSL *s, uint8_t *key_block, size_t key_block_len)
{
return tls1_PRF(s,
s->session->master_key, s->session->master_key_length,
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, key_block, key_block_len);
}
static int
tls1_change_cipher_state(SSL *s, int is_write)
{
CBS mac_key, key, iv;
/* Use client write keys on client write and server read. */
if ((!s->server && is_write) || (s->server && !is_write)) {
tls12_key_block_client_write(s->s3->hs.tls12.key_block,
&mac_key, &key, &iv);
} else {
tls12_key_block_server_write(s->s3->hs.tls12.key_block,
&mac_key, &key, &iv);
}
if (!is_write) {
if (!tls12_record_layer_change_read_cipher_state(s->internal->rl,
&mac_key, &key, &iv))
goto err;
if (SSL_is_dtls(s))
dtls1_reset_read_seq_numbers(s);
} else {
if (!tls12_record_layer_change_write_cipher_state(s->internal->rl,
&mac_key, &key, &iv))
goto err;
}
return (1);
err:
return (0);
}
int
tls1_change_read_cipher_state(SSL *s)
{
return tls1_change_cipher_state(s, 0);
}
int
tls1_change_write_cipher_state(SSL *s)
{
return tls1_change_cipher_state(s, 1);
}
int
tls1_setup_key_block(SSL *s)
{
struct tls12_key_block *key_block;
int mac_type = NID_undef, mac_secret_size = 0;
const EVP_CIPHER *cipher = NULL;
const EVP_AEAD *aead = NULL;
const EVP_MD *handshake_hash = NULL;
const EVP_MD *mac_hash = NULL;
int ret = 0;
/*
* XXX - callers should be changed so that they only call this
* function once.
*/
if (s->s3->hs.tls12.key_block != NULL)
return (1);
if (s->session->cipher &&
(s->session->cipher->algorithm_mac & SSL_AEAD)) {
if (!ssl_cipher_get_evp_aead(s->session, &aead)) {
SSLerror(s, SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
return (0);
}
} else {
/* XXX - mac_type and mac_secret_size are now unused. */
if (!ssl_cipher_get_evp(s->session, &cipher, &mac_hash,
&mac_type, &mac_secret_size)) {
SSLerror(s, SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
return (0);
}
}
if (!ssl_get_handshake_evp_md(s, &handshake_hash))
return (0);
tls12_record_layer_set_aead(s->internal->rl, aead);
tls12_record_layer_set_cipher_hash(s->internal->rl, cipher,
handshake_hash, mac_hash);
if ((key_block = tls12_key_block_new()) == NULL)
goto err;
if (!tls12_key_block_generate(key_block, s, aead, cipher, mac_hash))
goto err;
s->s3->hs.tls12.key_block = key_block;
key_block = NULL;
if (!(s->internal->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:
tls12_key_block_free(key_block);
return (ret);
}
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, currentvalpos;
int rv;
if (!SSL_is_init_finished(s)) {
SSLerror(s, SSL_R_BAD_STATE);
return 0;
}
/* 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 = 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_KEY_EXPANSION_CONST,
TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0)
goto err1;
rv = tls1_PRF(s, s->session->master_key, s->session->master_key_length,
val, vallen, NULL, 0, NULL, 0, NULL, 0, NULL, 0, out, olen);
goto ret;
err1:
SSLerror(s, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
rv = 0;
goto ret;
err2:
SSLerror(s, ERR_R_MALLOC_FAILURE);
rv = 0;
ret:
free(val);
return (rv);
}