sha224_256.hpp

/*
  ANCH Framework: ANother C++ Hack is a C++ framework based on C++11 standard
  Copyright (C) 2012 Vincent Lachenal

  This file is part of ANCH Framework.

  ANCH Framework 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.

  ANCH Framework 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 ANCH Framework.  If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _ANCH_CRYPTO_SHA224_256_H_
#define _ANCH_CRYPTO_SHA224_256_H_

#include "crypto/hash/sha2.hpp"

#include <array>
#include <list>


namespace anch {
  namespace crypto {

    template<typename H> H HMAC(const std::string&, const std::string&);

    template<std::size_t O, const std::array<uint32_t,8>& I>
    class SHA224_256: public SHA2<O,64,uint32_t,64,I> {

      friend SHA224_256 anch::crypto::HMAC<SHA224_256>(const std::string&, const std::string&);

      // Constructors +
    public:
      SHA224_256(): SHA2<O,64,uint32_t,64,I>() {
        // Nothing to do
      }

      template<class CharT, class Traits, class Allocator>
      SHA224_256(const std::basic_string<CharT,Traits,Allocator>& data):
        SHA2<O,64,uint32_t,64,I>() {
        Hash<O,64>::digest(data);
      }

      template<class CharT, class Traits>
      SHA224_256(std::basic_istream<CharT,Traits>& stream):
        SHA2<O,64,uint32_t,64,I>() {
        Hash<O,64>::digest(stream);
      }

    private:
      SHA224_256(const uint8_t* data, std::size_t len):
        SHA2<O,64,uint32_t,64,I>() {
        Hash<O,64>::digest(data, len);
      }
      // Constructors -


      // Destructor +
    public:
      virtual ~SHA224_256() {
        // Nothing to do
      }
      // Destructor -

      // Methods +
    private:
      virtual const std::array<uint32_t,64>& getTranslationArray() const {
        static std::array<uint32_t,64> trArray = { {
            0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b,
            0x59f111f1, 0x923f82a4, 0xab1c5ed5, 0xd807aa98, 0x12835b01,
            0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7,
            0xc19bf174, 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
            0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da, 0x983e5152,
            0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147,
            0x06ca6351, 0x14292967, 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc,
            0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
            0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819,
            0xd6990624, 0xf40e3585, 0x106aa070, 0x19a4c116, 0x1e376c08,
            0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f,
            0x682e6ff3, 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
            0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
          } };
        return trArray;
      }

      virtual uint32_t SIGMA0(uint32_t word) const {
        return (SHA2<O,64,uint32_t,64,I>::rotateRight(2, word)
                ^ SHA2<O,64,uint32_t,64,I>::rotateRight(13, word)
                ^ SHA2<O,64,uint32_t,64,I>::rotateRight(22, word));
      }

      virtual uint32_t SIGMA1(uint32_t word) const {
        return (SHA2<O,64,uint32_t,64,I>::rotateRight(6, word)
                ^ SHA2<O,64,uint32_t,64,I>::rotateRight(11, word)
                ^ SHA2<O,64,uint32_t,64,I>::rotateRight(25, word));
      }

      virtual uint32_t sigma0(uint32_t word) const {
        return (SHA2<O,64,uint32_t,64,I>::rotateRight(7, word)
                ^ SHA2<O,64,uint32_t,64,I>::rotateRight(18, word)
                ^ SHA2<O,64,uint32_t,64,I>::shiftRight(3, word));
      }

      virtual uint32_t sigma1(uint32_t word) const {
        return (SHA2<O,64,uint32_t,64,I>::rotateRight(17, word)
                ^ SHA2<O,64,uint32_t,64,I>::rotateRight(19, word)
                ^ SHA2<O,64,uint32_t,64,I>::shiftRight(10, word));
      }
      // Methods -

    };

  }
}

#endif // _ANCH_CRYPTO_SHA224_256_H_