/*

* CRC32

* (C) 1999-2007 Jack Lloyd

*

* Botan is released under the Simplified BSD License (see license.txt)

*/

#ifndef BOTAN_CRC32_H_

#define BOTAN_CRC32_H_

#include <botan/hash.h>

BOTAN_FUTURE_INTERNAL_HEADER(crc32.h)

namespace Botan {

/**

* 32-bit cyclic redundancy check

*/

class BOTAN_PUBLIC_API(2,0) CRC32 final : public HashFunction

   {

   public:

      std::string name() const override { return "CRC32"; }

      size_t output_length() const override { return 4; }

      HashFunction* clone() const override { return new CRC32; }

      std::unique_ptr<HashFunction> copy_state() const override;

      void clear() override { m_crc = 0xFFFFFFFF; }

      CRC32() { clear(); }

      ~CRC32() { clear(); }

   private:

      void add_data(const uint8_t[], size_t) override;

      void final_result(uint8_t[]) override;

      uint32_t m_crc;

   };

}

#endif