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110 lines
3.1 KiB
C++
110 lines
3.1 KiB
C++
/*
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* Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU GPL v2 license, you may redistribute it and/or modify it under version 2 of the License, or (at your option), any later version.
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* Copyright (C) 2008-2016 TrinityCore <http://www.trinitycore.org/>
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* Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
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*/
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#ifndef _AUTH_BIGNUMBER_H
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#define _AUTH_BIGNUMBER_H
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#include "Define.h"
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#include "Errors.h"
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#include <array>
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#include <memory>
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#include <string>
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#include <vector>
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struct bignum_st;
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class BigNumber
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{
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public:
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BigNumber();
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BigNumber(BigNumber const& bn);
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BigNumber(uint32 v) : BigNumber() { SetDword(v); }
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BigNumber(int32 v) : BigNumber() { SetDword(v); }
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BigNumber(std::string const& v) : BigNumber() { SetHexStr(v); }
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template<size_t Size>
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BigNumber(std::array<uint8, Size> const& v, bool littleEndian = true) : BigNumber() { SetBinary(v.data(), Size, littleEndian); }
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~BigNumber();
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void SetDword(int32);
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void SetDword(uint32);
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void SetQword(uint64);
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void SetBinary(uint8 const* bytes, int32 len, bool littleEndian = true);
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template<typename Container>
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auto SetBinary(Container const& c, bool littleEndian = true) -> std::enable_if_t<!std::is_pointer_v<std::decay_t<Container>>> { SetBinary(std::data(c), std::size(c), littleEndian); }
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void SetHexStr(char const* str);
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void SetHexStr(std::string const& str) { SetHexStr(str.c_str()); }
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void SetRand(int32 numbits);
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BigNumber& operator=(BigNumber const& bn);
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BigNumber operator+=(BigNumber const& bn);
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BigNumber operator+(BigNumber const& bn) const
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{
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BigNumber t(*this);
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return t += bn;
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}
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BigNumber operator-=(BigNumber const& bn);
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BigNumber operator-(BigNumber const& bn) const
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{
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BigNumber t(*this);
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return t -= bn;
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}
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BigNumber operator*=(BigNumber const& bn);
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BigNumber operator*(BigNumber const& bn) const
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{
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BigNumber t(*this);
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return t *= bn;
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}
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BigNumber operator/=(BigNumber const& bn);
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BigNumber operator/(BigNumber const& bn) const
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{
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BigNumber t(*this);
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return t /= bn;
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}
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BigNumber operator%=(BigNumber const& bn);
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BigNumber operator%(BigNumber const& bn) const
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{
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BigNumber t(*this);
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return t %= bn;
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}
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[[nodiscard]] bool isZero() const;
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BigNumber ModExp(BigNumber const& bn1, BigNumber const& bn2) const;
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BigNumber Exp(BigNumber const&) const;
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int32 GetNumBytes() const;
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struct bignum_st* BN() { return _bn; }
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struct bignum_st const* BN() const { return _bn; }
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uint32 AsDword();
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void GetBytes(uint8* buf, size_t bufsize, bool littleEndian = true) const;
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std::vector<uint8> ToByteVector(int32 minSize = 0, bool littleEndian = true) const;
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template<std::size_t Size>
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std::array<uint8, Size> ToByteArray(bool littleEndian = true) const
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{
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std::array<uint8, Size> buf;
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GetBytes(buf.data(), Size, littleEndian);
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return buf;
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}
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[[nodiscard]] char* AsHexStr() const;
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[[nodiscard]] char* AsDecStr() const;
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private:
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struct bignum_st* _bn;
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};
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#endif
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