src/shared/Auth/BigNumber.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_BIGNUMBER_H
  20 #define _AUTH_BIGNUMBER_H
  21
  22 #include "Common.h"
  23 #include "ByteBuffer.h"
  24
  25 struct bignum_st;
  26
  27 class BigNumber
  28 {
  29     public:
  30         BigNumber();
  31         BigNumber(const BigNumber &bn);
  32         BigNumber(uint32);
  33         ~BigNumber();
  34
  35         void SetDword(uint32);
  36         void SetQword(uint64);
  37         void SetBinary(const uint8 *bytes, int len);
  38         void SetHexStr(const char *str);
  39
  40         void SetRand(int numbits);
  41
  42         BigNumber operator=(const BigNumber &bn);
  43
  44         BigNumber operator+=(const BigNumber &bn);
  45         BigNumber operator+(const BigNumber &bn)
  46         {
  47             BigNumber t(*this);
  48             return t += bn;
  49         }
  50         BigNumber operator-=(const BigNumber &bn);
  51         BigNumber operator-(const BigNumber &bn)
  52         {
  53             BigNumber t(*this);
  54             return t -= bn;
  55         }
  56         BigNumber operator*=(const BigNumber &bn);
  57         BigNumber operator*(const BigNumber &bn)
  58         {
  59             BigNumber t(*this);
  60             return t *= bn;
  61         }
  62         BigNumber operator/=(const BigNumber &bn);
  63         BigNumber operator/(const BigNumber &bn)
  64         {
  65             BigNumber t(*this);
  66             return t /= bn;
  67         }
  68         BigNumber operator%=(const BigNumber &bn);
  69         BigNumber operator%(const BigNumber &bn)
  70         {
  71             BigNumber t(*this);
  72             return t %= bn;
  73         }
  74
  75         BigNumber ModExp(const BigNumber &bn1, const BigNumber &bn2);
  76         BigNumber Exp(const BigNumber &);
  77
  78         int GetNumBytes(void);
  79
  80         struct bignum_st *BN() { return _bn; }
  81
  82         uint32 AsDword();
  83         uint8* AsByteArray(int minSize = 0);
  84         ByteBuffer AsByteBuffer();
  85         std::vector<uint8> AsByteVector();
  86
  87         const char *AsHexStr();
  88         const char *AsDecStr();
  89
  90     private:
  91         struct bignum_st *_bn;
  92         uint8 *_array;
  93 };
  94 #endif