text: /*
   * Copyright (C) 2005 - 2012 MaNGOS <http://www.getmangos.com/>
   *
   * Copyright (C) 2008 - 2012 Trinity <http://www.trinitycore.org/>
   *
   * Copyright (C) 2010 - 2012 ProjectSkyfire <http://www.projectskyfire.org/>
   * 
   * Copyright (C) 2011 - 2012 ArkCORE <http://www.arkania.net/>
   *
   * 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, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
   */
  
  #ifndef _AUTH_HMAC_H
  #define _AUTH_HMAC_H
  
  #include "Common.h"
  #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 UpdateBigNumber(BigNumber *bn);
  	void UpdateData(const uint8 *data, int length);
  	void UpdateData(const std::string &str);
  	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
  