sha1.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/>.
*/
#pragma once
 
#include "crypto/hash/hash.hpp"
 
 
namespace anch::crypto {
 
  template<typename H> H HMAC(const std::string&, const std::string&);

  class SHA1: public Hash<20,64> {
 
    friend SHA1 anch::crypto::HMAC<SHA1>(const std::string&, const std::string&);
 
  private:
    struct Context {
      std::array<uint32_t,5> state;

      uint64_t size;

      std::array<uint8_t,64> buffer;

      std::array<uint8_t,20> digest;

      Context();

      void reset();
 
    };
 
    // Attributes +
  private:
    Context _context;
    // Attributes -
 
 
    // Constructors +
  public:
    SHA1();

    SHA1(const std::string& data);

    SHA1(std::istream& stream);
 
  private:
    SHA1(const uint8_t* data, std::size_t len);
    // Constructors -
 
 
    // Destructor +
  public:
    virtual ~SHA1();
    // Destructor -
 
 
    // Methods +
  public:
    virtual const std::array<uint8_t,20>& digest() const override;
 
  protected:
    virtual void reset() override;

    virtual void addData(const uint8_t* data, std::size_t len) override;

    virtual void finalize() override;
 
  private:
    void transform(const uint8_t* buffer);
    // Methods -
 
  };
 
  extern template class Hash<20,64>;
  extern template SHA1 HMAC<SHA1>(const std::string&, const std::string&);

  void registerSHA1UUIDProvider();
 
}