/*

* CRC24

* (C) 1999-2007 Jack Lloyd

* (C) 2017 [Ribose Inc](https://www.ribose.com). Performed by Krzysztof Kwiatkowski.

*

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

*/

#ifndef BOTAN_CRC24_H_

#define BOTAN_CRC24_H_

#include <botan/hash.h>

namespace Botan {

/**

* 24-bit cyclic redundancy check

*

* This is the CRC used for checksums in PGP

*/

class CRC24 final : public HashFunction {

   public:

      std::string name() const override { return "CRC24"; }

      size_t output_length() const override { return 3; }

      std::unique_ptr<HashFunction> new_object() const override { return std::make_unique<CRC24>(); }

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

      void clear() override { m_crc = 0XCE04B7L; }

      CRC24() { clear(); }

      ~CRC24() { clear(); }

   private:

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

      void final_result(uint8_t[]) override;

      uint32_t m_crc;

};

}  // namespace Botan

#endif