/* 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 <openssl/ssl.h>
#include <assert.h>
#include <string.h>
#include <openssl/buf.h>
#include <openssl/digest.h>
#include <openssl/err.h>
#include <openssl/mem.h>
#include <openssl/md5.h>
#include <openssl/nid.h>
#include <openssl/sha.h>
#include "../crypto/internal.h"
#include "internal.h"
int SSL_TRANSCRIPT_init(SSL_TRANSCRIPT *transcript) {
SSL_TRANSCRIPT_cleanup(transcript);
transcript->buffer = BUF_MEM_new();
return transcript->buffer != NULL;
}
/* init_digest_with_data calls |EVP_DigestInit_ex| on |ctx| with |md| and then
* writes the data in |buf| to it. */
static int init_digest_with_data(EVP_MD_CTX *ctx, const EVP_MD *md,
const BUF_MEM *buf) {
if (!EVP_DigestInit_ex(ctx, md, NULL)) {
return 0;
}
EVP_DigestUpdate(ctx, buf->data, buf->length);
return 1;
}
int SSL_TRANSCRIPT_init_hash(SSL_TRANSCRIPT *transcript, uint16_t version,
int algorithm_prf) {
const EVP_MD *md = ssl_get_handshake_digest(algorithm_prf, version);
/* To support SSL 3.0's Finished and CertificateVerify constructions,
* EVP_md5_sha1() is split into MD5 and SHA-1 halves. When SSL 3.0 is removed,
* we can simplify this. */
if (md == EVP_md5_sha1()) {
if (!init_digest_with_data(&transcript->md5, EVP_md5(),
transcript->buffer)) {
return 0;
}
md = EVP_sha1();
}
if (!init_digest_with_data(&transcript->hash, md, transcript->buffer)) {
return 0;
}
return 1;
}
void SSL_TRANSCRIPT_cleanup(SSL_TRANSCRIPT *transcript) {
SSL_TRANSCRIPT_free_buffer(transcript);
EVP_MD_CTX_cleanup(&transcript->hash);
EVP_MD_CTX_cleanup(&transcript->md5);
}
void SSL_TRANSCRIPT_free_buffer(SSL_TRANSCRIPT *transcript) {
BUF_MEM_free(transcript->buffer);
transcript->buffer = NULL;
}
size_t SSL_TRANSCRIPT_digest_len(const SSL_TRANSCRIPT *transcript) {
return EVP_MD_size(SSL_TRANSCRIPT_md(transcript));
}
const EVP_MD *SSL_TRANSCRIPT_md(const SSL_TRANSCRIPT *transcript) {
if (EVP_MD_CTX_md(&transcript->md5) != NULL) {
return EVP_md5_sha1();
}
return EVP_MD_CTX_md(&transcript->hash);
}
int SSL_TRANSCRIPT_update(SSL_TRANSCRIPT *transcript, const uint8_t *in,
size_t in_len) {
/* Depending on the state of the handshake, either the handshake buffer may be
* active, the rolling hash, or both. */
if (transcript->buffer != NULL) {
size_t new_len = transcript->buffer->length + in_len;
if (new_len < in_len) {
OPENSSL_PUT_ERROR(SSL, ERR_R_OVERFLOW);
return 0;
}
if (!BUF_MEM_grow(transcript->buffer, new_len)) {
return 0;
}
OPENSSL_memcpy(transcript->buffer->data + new_len - in_len, in, in_len);
}
if (EVP_MD_CTX_md(&transcript->hash) != NULL) {
EVP_DigestUpdate(&transcript->hash, in, in_len);
}
if (EVP_MD_CTX_md(&transcript->md5) != NULL) {
EVP_DigestUpdate(&transcript->md5, in, in_len);
}
return 1;
}
int SSL_TRANSCRIPT_get_hash(const SSL_TRANSCRIPT *transcript, uint8_t *out,
size_t *out_len) {
int ret = 0;
EVP_MD_CTX ctx;
EVP_MD_CTX_init(&ctx);
unsigned md5_len = 0;
if (EVP_MD_CTX_md(&transcript->md5) != NULL) {
if (!EVP_MD_CTX_copy_ex(&ctx, &transcript->md5) ||
!EVP_DigestFinal_ex(&ctx, out, &md5_len)) {
goto err;
}
}
unsigned len;
if (!EVP_MD_CTX_copy_ex(&ctx, &transcript->hash) ||
!EVP_DigestFinal_ex(&ctx, out + md5_len, &len)) {
goto err;
}
*out_len = md5_len + len;
ret = 1;
err:
EVP_MD_CTX_cleanup(&ctx);
return ret;
}
static int ssl3_handshake_mac(SSL_TRANSCRIPT *transcript,
const SSL_SESSION *session,
const EVP_MD_CTX *ctx_template,
const char *sender, size_t sender_len,
uint8_t *p, size_t *out_len) {
unsigned int len;
size_t npad, n;
unsigned int i;
uint8_t md_buf[EVP_MAX_MD_SIZE];
EVP_MD_CTX ctx;
EVP_MD_CTX_init(&ctx);
if (!EVP_MD_CTX_copy_ex(&ctx, ctx_template)) {
EVP_MD_CTX_cleanup(&ctx);
OPENSSL_PUT_ERROR(SSL, ERR_LIB_EVP);
return 0;
}
static const uint8_t kPad1[48] = {
0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
};
static const uint8_t kPad2[48] = {
0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c,
0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c,
0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c,
0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c,
};
n = EVP_MD_CTX_size(&ctx);
npad = (48 / n) * n;
if (sender != NULL) {
EVP_DigestUpdate(&ctx, sender, sender_len);
}
EVP_DigestUpdate(&ctx, session->master_key, session->master_key_length);
EVP_DigestUpdate(&ctx, kPad1, npad);
EVP_DigestFinal_ex(&ctx, md_buf, &i);
if (!EVP_DigestInit_ex(&ctx, EVP_MD_CTX_md(&ctx), NULL)) {
EVP_MD_CTX_cleanup(&ctx);
OPENSSL_PUT_ERROR(SSL, ERR_LIB_EVP);
return 0;
}
EVP_DigestUpdate(&ctx, session->master_key, session->master_key_length);
EVP_DigestUpdate(&ctx, kPad2, npad);
EVP_DigestUpdate(&ctx, md_buf, i);
EVP_DigestFinal_ex(&ctx, p, &len);
EVP_MD_CTX_cleanup(&ctx);
*out_len = len;
return 1;
}
int SSL_TRANSCRIPT_ssl3_cert_verify_hash(SSL_TRANSCRIPT *transcript,
uint8_t *out, size_t *out_len,
const SSL_SESSION *session,
int signature_algorithm) {
if (SSL_TRANSCRIPT_md(transcript) != EVP_md5_sha1()) {
OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
return 0;
}
if (signature_algorithm == SSL_SIGN_RSA_PKCS1_MD5_SHA1) {
size_t md5_len, len;
if (!ssl3_handshake_mac(transcript, session, &transcript->md5, NULL, 0, out,
&md5_len) ||
!ssl3_handshake_mac(transcript, session, &transcript->hash, NULL, 0,
out + md5_len, &len)) {
return 0;
}
*out_len = md5_len + len;
return 1;
}
if (signature_algorithm == SSL_SIGN_ECDSA_SHA1) {
return ssl3_handshake_mac(transcript, session, &transcript->hash, NULL, 0,
out, out_len);
}
OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
return 0;
}
int SSL_TRANSCRIPT_finish_mac(SSL_TRANSCRIPT *transcript, uint8_t *out,
size_t *out_len, const SSL_SESSION *session,
int from_server, uint16_t version) {
if (version == SSL3_VERSION) {
if (SSL_TRANSCRIPT_md(transcript) != EVP_md5_sha1()) {
OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
return 0;
}
const char *sender = from_server ? SSL3_MD_SERVER_FINISHED_CONST
: SSL3_MD_CLIENT_FINISHED_CONST;
const size_t sender_len = 4;
size_t md5_len, len;
if (!ssl3_handshake_mac(transcript, session, &transcript->md5, sender,
sender_len, out, &md5_len) ||
!ssl3_handshake_mac(transcript, session, &transcript->hash, sender,
sender_len, out + md5_len, &len)) {
return 0;
}
*out_len = md5_len + len;
return 1;
}
/* At this point, the handshake should have released the handshake buffer on
* its own. */
assert(transcript->buffer == NULL);
const char *label = TLS_MD_CLIENT_FINISH_CONST;
size_t label_len = TLS_MD_SERVER_FINISH_CONST_SIZE;
if (from_server) {
label = TLS_MD_SERVER_FINISH_CONST;
label_len = TLS_MD_SERVER_FINISH_CONST_SIZE;
}
uint8_t digests[EVP_MAX_MD_SIZE];
size_t digests_len;
if (!SSL_TRANSCRIPT_get_hash(transcript, digests, &digests_len)) {
return 0;
}
static const size_t kFinishedLen = 12;
if (!tls1_prf(SSL_TRANSCRIPT_md(transcript), out, kFinishedLen,
session->master_key, session->master_key_length, label,
label_len, digests, digests_len, NULL, 0)) {
return 0;
}
*out_len = kFinishedLen;
return 1;
}