src/shared/Auth/Hmac.h

   1 /*
   2  * Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #ifndef _AUTH_HMAC_H
  20 #define _AUTH_HMAC_H
  21
  22 #include "Common.h"
  23 #include <openssl/hmac.h>
  24 #include <openssl/sha.h>
  25
  26 class BigNumber;
  27
  28 #define SEED_KEY_SIZE 16
  29
  30 class HmacHash
  31 {
  32     public:
  33         HmacHash(uint32 len, uint8 *seed);
  34         ~HmacHash();
  35         void UpdateBigNumber(BigNumber *bn);
  36         void UpdateData(const uint8 *data, int length);
  37         void Finalize();
  38         uint8 *ComputeHash(BigNumber *bn);
  39         uint8 *GetDigest() { return (uint8*)m_digest; }
  40         int GetLength() { return SHA_DIGEST_LENGTH; }
  41     private:
  42         HMAC_CTX m_ctx;
  43         uint8 m_digest[SHA_DIGEST_LENGTH];
  44 };
  45 #endif