/*
* This file is part of the Pandaria 5.4.8 Project. See THANKS file for Copyright information
*
* 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

class HmacHash
{
    public:
        HmacHash(uint32 len, uint8 *seed);
        ~HmacHash();
        void UpdateData(const std::string &str);
        void UpdateData(const uint8* data, size_t len);
        void Finalize();
        uint8 *ComputeHash(BigNumber* bn);
        uint8 *GetDigest() { return (uint8*)m_digest; }
        int GetLength() const { return SHA_DIGEST_LENGTH; }
    private:
        HMAC_CTX* m_ctx;
        uint8 m_digest[SHA_DIGEST_LENGTH];
};
#endif

