whirlpool.hpp

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/*
 * libxcks
 * Copyright (C) 2022 Julien Couot
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 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 Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
#ifndef INC_WHIRLPOOL_HPP_6E1F0061_4A5D_41A1_A6BE_82379C71A72D
#define INC_WHIRLPOOL_HPP_6E1F0061_4A5D_41A1_A6BE_82379C71A72D
 
//---------------------------------------------------------------------------
#include "checksumex.hpp"
//---------------------------------------------------------------------------
 
 
namespace libxcks
{
class Whirlpool final : public ChecksumEx
{
 protected:
  #define WHIRLPOOL_DIGESTBYTES 64  
  #define WHIRLPOOL_DIGESTBITS  (8*WHIRLPOOL_DIGESTBYTES)  
  #define WHIRLPOOL_DIGESTQUADWORDS (WHIRLPOOL_DIGESTBYTES/8)  
 
  #define WHIRLPOOL_WBLOCKBYTES 64  
  #define WHIRLPOOL_WBLOCKBITS  (8*WHIRLPOOL_WBLOCKBYTES)  
 
  #define WHIRLPOOL_LENGTHBYTES 32  
  #define WHIRLPOOL_LENGTHBITS  (8*WHIRLPOOL_LENGTHBYTES)  
 
  uint8_t   bitLength[WHIRLPOOL_LENGTHBYTES];  
  uint8_t   buffer[WHIRLPOOL_WBLOCKBYTES];     
  int      bufferBits;                        
  int      bufferPos;                         
  uint64_t hash[WHIRLPOOL_DIGESTQUADWORDS];   
 
 
  static const uint64_t C0[];  
  static const uint64_t C1[];  
  static const uint64_t C2[];  
  static const uint64_t C3[];  
  static const uint64_t C4[];  
  static const uint64_t C5[];  
  static const uint64_t C6[];  
  static const uint64_t C7[];  
 
  static const unsigned int R;
  static const uint64_t rc[];  
 
 public:
  Whirlpool();
 
  void reset() override;
 
  uint8_t* getValue(uint8_t* buffer) const override;
 
  size_t getSize() const override { return WHIRLPOOL_DIGESTBYTES; }
 
  void update(const uint8_t* buf, size_t len) override;
 
 protected:
  void finish(uint8_t* const result);
 
  void process_buffer();
 
 public:
  std::string getName() const override
  {
    return getHashName();
  }
 
  ChecksumAlgoId getID() const override
  {
    return getIdentifier();
  }
 
  static std::string getHashName()
  {
    return "Whirlpool";
  }
 
  static constexpr ChecksumAlgoId getIdentifier()
  {
    return ChecksumAlgoId::Whirlpool;
  }
 
  static Checksum* getNewInstance()
  {
    return new Whirlpool();
  }
};
//---------------------------------------------------------------------------
}  // namespace libxcks
//---------------------------------------------------------------------------
 
#endif  // INC_WHIRLPOOL_HPP_6E1F0061_4A5D_41A1_A6BE_82379C71A72D