Viewing file:  md5_sha1.c (2.64 KB) -rw-r--r--
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/*
* Copyright 2015-2020 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (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
*/
/*
* MD5 and SHA-1 low level APIs are deprecated for public use, but still ok for
* internal use.
*/
#include "internal/deprecated.h"
#include <string.h>
#include "prov/md5_sha1.h"
#include <openssl/evp.h>
int ossl_md5_sha1_init(MD5_SHA1_CTX *mctx)
{
if (!MD5_Init(&mctx->md5))
return 0;
return SHA1_Init(&mctx->sha1);
}
int ossl_md5_sha1_update(MD5_SHA1_CTX *mctx, const void *data, size_t count)
{
if (!MD5_Update(&mctx->md5, data, count))
return 0;
return SHA1_Update(&mctx->sha1, data, count);
}
int ossl_md5_sha1_final(unsigned char *md, MD5_SHA1_CTX *mctx)
{
if (!MD5_Final(md, &mctx->md5))
return 0;
return SHA1_Final(md + MD5_DIGEST_LENGTH, &mctx->sha1);
}
int ossl_md5_sha1_ctrl(MD5_SHA1_CTX *mctx, int cmd, int mslen, void *ms)
{
unsigned char padtmp[48];
unsigned char md5tmp[MD5_DIGEST_LENGTH];
unsigned char sha1tmp[SHA_DIGEST_LENGTH];
if (cmd != EVP_CTRL_SSL3_MASTER_SECRET)
return -2;
if (mctx == NULL)
return 0;
/* SSLv3 client auth handling: see RFC-6101 5.6.8 */
if (mslen != 48)
return 0;
/* At this point hash contains all handshake messages, update
* with master secret and pad_1.
*/
if (ossl_md5_sha1_update(mctx, ms, mslen) <= 0)
return 0;
/* Set padtmp to pad_1 value */
memset(padtmp, 0x36, sizeof(padtmp));
if (!MD5_Update(&mctx->md5, padtmp, sizeof(padtmp)))
return 0;
if (!MD5_Final(md5tmp, &mctx->md5))
return 0;
if (!SHA1_Update(&mctx->sha1, padtmp, 40))
return 0;
if (!SHA1_Final(sha1tmp, &mctx->sha1))
return 0;
/* Reinitialise context */
if (!ossl_md5_sha1_init(mctx))
return 0;
if (ossl_md5_sha1_update(mctx, ms, mslen) <= 0)
return 0;
/* Set padtmp to pad_2 value */
memset(padtmp, 0x5c, sizeof(padtmp));
if (!MD5_Update(&mctx->md5, padtmp, sizeof(padtmp)))
return 0;
if (!MD5_Update(&mctx->md5, md5tmp, sizeof(md5tmp)))
return 0;
if (!SHA1_Update(&mctx->sha1, padtmp, 40))
return 0;
if (!SHA1_Update(&mctx->sha1, sha1tmp, sizeof(sha1tmp)))
return 0;
/* Now when ctx is finalised it will return the SSL v3 hash value */
OPENSSL_cleanse(md5tmp, sizeof(md5tmp));
OPENSSL_cleanse(sha1tmp, sizeof(sha1tmp));
return 1;
}
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