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/*
* Copyright (C) 2008-2019 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_BIGNUMBER_H
#define _AUTH_BIGNUMBER_H
#include "Define.h"
#include <array>
#include <memory>
#include <string>
struct bignum_st;
class TC_COMMON_API BigNumber
{
public:
BigNumber();
BigNumber(BigNumber const& bn);
BigNumber(uint32);
~BigNumber();
void SetDword(uint32);
void SetQword(uint64);
void SetBinary(uint8 const* bytes, int32 len);
bool SetHexStr(char const* str);
void SetRand(int32 numbits);
BigNumber& operator=(BigNumber const& bn);
BigNumber& operator+=(BigNumber const& bn);
BigNumber operator+(BigNumber const& bn) const
{
BigNumber t(*this);
return t += bn;
}
BigNumber& operator-=(BigNumber const& bn);
BigNumber operator-(BigNumber const& bn) const
{
BigNumber t(*this);
return t -= bn;
}
BigNumber& operator*=(BigNumber const& bn);
BigNumber operator*(BigNumber const& bn) const
{
BigNumber t(*this);
return t *= bn;
}
BigNumber& operator/=(BigNumber const& bn);
BigNumber operator/(BigNumber const& bn) const
{
BigNumber t(*this);
return t /= bn;
}
BigNumber& operator%=(BigNumber const& bn);
BigNumber operator%(BigNumber const& bn) const
{
BigNumber t(*this);
return t %= bn;
}
BigNumber& operator<<=(int n);
BigNumber operator<<(int n) const
{
BigNumber t(*this);
return t <<= n;
}
int CompareTo(BigNumber const& bn) const;
bool operator<=(BigNumber const& bn) const { return (CompareTo(bn) <= 0); }
bool operator==(BigNumber const& bn) const { return (CompareTo(bn) == 0); }
bool operator>=(BigNumber const& bn) const { return (CompareTo(bn) >= 0); }
bool operator<(BigNumber const& bn) const { return (CompareTo(bn) < 0); }
bool operator>(BigNumber const& bn) const { return (CompareTo(bn) > 0); }
bool IsZero() const;
bool IsNegative() const;
BigNumber ModExp(BigNumber const& bn1, BigNumber const& bn2) const;
BigNumber Exp(BigNumber const&) const;
int32 GetNumBytes() const;
struct bignum_st *BN() { return _bn; }
uint32 AsDword() const;
bool AsByteArray(uint8* buf, std::size_t bufsize, bool littleEndian = true) const;
std::unique_ptr<uint8[]> AsByteArray(int32 minSize = 0, bool littleEndian = true) const;
template <std::size_t N> std::array<uint8, N> AsByteArray(bool littleEndian = true) const
{
std::array<uint8, N> buf;
AsByteArray(buf.data(), N, littleEndian);
return buf;
}
std::string AsHexStr() const;
std::string AsDecStr() const;
private:
struct bignum_st *_bn;
};
#endif
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