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/*
* 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