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142 lines
3.2 KiB
C
142 lines
3.2 KiB
C
/*
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* Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#if !defined(OPENSSL_NO_MD5)
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# include <openssl/evp.h>
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# include <openssl/objects.h>
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# include <openssl/x509.h>
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# include <openssl/md5.h>
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# include <openssl/sha.h>
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# include "internal/cryptlib.h"
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# include "crypto/evp.h"
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# include <openssl/rsa.h>
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struct md5_sha1_ctx {
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MD5_CTX md5;
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SHA_CTX sha1;
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};
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static int init(EVP_MD_CTX *ctx)
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{
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struct md5_sha1_ctx *mctx = EVP_MD_CTX_md_data(ctx);
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if (!MD5_Init(&mctx->md5))
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return 0;
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return SHA1_Init(&mctx->sha1);
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}
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static int update(EVP_MD_CTX *ctx, const void *data, size_t count)
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{
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struct md5_sha1_ctx *mctx = EVP_MD_CTX_md_data(ctx);
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if (!MD5_Update(&mctx->md5, data, count))
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return 0;
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return SHA1_Update(&mctx->sha1, data, count);
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}
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static int final(EVP_MD_CTX *ctx, unsigned char *md)
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{
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struct md5_sha1_ctx *mctx = EVP_MD_CTX_md_data(ctx);
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if (!MD5_Final(md, &mctx->md5))
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return 0;
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return SHA1_Final(md + MD5_DIGEST_LENGTH, &mctx->sha1);
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}
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static int ctrl(EVP_MD_CTX *ctx, int cmd, int mslen, void *ms)
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{
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unsigned char padtmp[48];
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unsigned char md5tmp[MD5_DIGEST_LENGTH];
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unsigned char sha1tmp[SHA_DIGEST_LENGTH];
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struct md5_sha1_ctx *mctx;
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if (cmd != EVP_CTRL_SSL3_MASTER_SECRET)
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return -2;
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if (ctx == NULL)
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return 0;
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mctx = EVP_MD_CTX_md_data(ctx);
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/* SSLv3 client auth handling: see RFC-6101 5.6.8 */
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if (mslen != 48)
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return 0;
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/* At this point hash contains all handshake messages, update
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* with master secret and pad_1.
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*/
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if (update(ctx, ms, mslen) <= 0)
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return 0;
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/* Set padtmp to pad_1 value */
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memset(padtmp, 0x36, sizeof(padtmp));
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if (!MD5_Update(&mctx->md5, padtmp, sizeof(padtmp)))
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return 0;
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if (!MD5_Final(md5tmp, &mctx->md5))
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return 0;
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if (!SHA1_Update(&mctx->sha1, padtmp, 40))
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return 0;
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if (!SHA1_Final(sha1tmp, &mctx->sha1))
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return 0;
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/* Reinitialise context */
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if (!init(ctx))
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return 0;
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if (update(ctx, ms, mslen) <= 0)
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return 0;
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/* Set padtmp to pad_2 value */
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memset(padtmp, 0x5c, sizeof(padtmp));
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if (!MD5_Update(&mctx->md5, padtmp, sizeof(padtmp)))
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return 0;
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if (!MD5_Update(&mctx->md5, md5tmp, sizeof(md5tmp)))
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return 0;
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if (!SHA1_Update(&mctx->sha1, padtmp, 40))
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return 0;
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if (!SHA1_Update(&mctx->sha1, sha1tmp, sizeof(sha1tmp)))
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return 0;
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/* Now when ctx is finalised it will return the SSL v3 hash value */
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OPENSSL_cleanse(md5tmp, sizeof(md5tmp));
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OPENSSL_cleanse(sha1tmp, sizeof(sha1tmp));
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return 1;
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}
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static const EVP_MD md5_sha1_md = {
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NID_md5_sha1,
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NID_md5_sha1,
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MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH,
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0,
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init,
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update,
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final,
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NULL,
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NULL,
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MD5_CBLOCK,
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sizeof(EVP_MD *) + sizeof(struct md5_sha1_ctx),
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ctrl
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};
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const EVP_MD *EVP_md5_sha1(void)
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{
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return &md5_sha1_md;
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}
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#endif
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