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/*
* Copyright (C) 2008-2018 TrinityCore <https://www.trinitycore.org/>
* Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _AUTH_HMAC_H
#define _AUTH_HMAC_H
#include "Define.h"
#include <string>
#include <openssl/hmac.h>
#include <openssl/sha.h>
class BigNumber;
#define SEED_KEY_SIZE 16
typedef EVP_MD const* (*HashCreateFn)();
template<HashCreateFn HashCreator, uint32 DigestLength>
class TC_COMMON_API HmacHash
{
public:
HmacHash(uint32 len, uint8 const* seed);
~HmacHash();
void UpdateData(std::string const& str);
void UpdateData(uint8 const* data, size_t len);
void Finalize();
uint8* ComputeHash(BigNumber* bn);
uint8* GetDigest() { return _digest; }
uint32 GetLength() const { return DigestLength; }
private:
HMAC_CTX* _ctx;
uint8 _digest[DigestLength];
};
typedef HmacHash<EVP_sha1, SHA_DIGEST_LENGTH> HmacSha1;
typedef HmacHash<EVP_sha256, SHA256_DIGEST_LENGTH> HmacSha256;
#endif
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