Sha2Impl.h

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// this is for emacs file handling -*- mode: c++; indent-tabs-mode: nil -*-

// -- BEGIN LICENSE BLOCK ----------------------------------------------
// This file is part of FZIs ic_workspace.
//
// This program is free software licensed under the LGPL
// (GNU LESSER GENERAL PUBLIC LICENSE Version 3).
// You can find a copy of this license in LICENSE folder in the top
// directory of the source code.
//
// © Copyright 2016 FZI Forschungszentrum Informatik, Karlsruhe, Germany
//
// -- END LICENSE BLOCK ------------------------------------------------

//----------------------------------------------------------------------
//----------------------------------------------------------------------
#ifndef ICL_CORE_CRYPT_SHA2_IMPL_H_INCLUDED
#define ICL_CORE_CRYPT_SHA2_IMPL_H_INCLUDED

#include <icl_core/BaseTypes.h>

namespace icl_core {
namespace crypt {

template <typename T, T t_h0, T t_h1, T t_h2, T t_h3, T t_h4, T t_h5, T t_h6, T t_h7, size_t t_len>
class Sha2Impl
{
public:
  static const size_t cMESSAGE_BLOCK_SIZE = 64;
  static const size_t cMESSAGE_PAD_POSITION = 56;

  Sha2Impl();

  void clear();

  ::icl_core::String getHexDigest() const;

protected:
  void processBuffer();

  T m_digest[8];
  uint64_t m_message_size;
  uint8_t m_buffer[cMESSAGE_BLOCK_SIZE];
  size_t m_buffer_fill;
};

template <uint64_t t_h0, uint64_t t_h1, uint64_t t_h2, uint64_t t_h3, uint64_t t_h4, uint64_t t_h5, uint64_t t_h6, uint64_t t_h7, size_t t_len>
class Sha2Impl<uint64_t, t_h0, t_h1, t_h2, t_h3, t_h4, t_h5, t_h6, t_h7, t_len>
{
public:
  static const size_t cMESSAGE_BLOCK_SIZE = 128;
  static const size_t cMESSAGE_PAD_POSITION = 112;

  Sha2Impl();

  void clear();

  ::icl_core::String getHexDigest() const;

protected:
  void processBuffer();

  void finalizeBuffer(size_t size);

  uint64_t m_digest[8];
  uint64_t m_message_size;
  uint8_t m_buffer[cMESSAGE_BLOCK_SIZE];
  size_t m_buffer_fill;
};

}
}

#include "icl_core_crypt/Sha2Impl.hpp"

#endif