Botan  2.4.0
Crypto and TLS for C++11
crc32.h
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1 /*
2 * CRC32
3 * (C) 1999-2007 Jack Lloyd
4 *
5 * Botan is released under the Simplified BSD License (see license.txt)
6 */
7 
8 #ifndef BOTAN_CRC32_H_
9 #define BOTAN_CRC32_H_
10 
11 #include <botan/hash.h>
12 
13 namespace Botan {
14 
15 /**
16 * 32-bit cyclic redundancy check
17 */
18 class BOTAN_PUBLIC_API(2,0) CRC32 final : public HashFunction
19  {
20  public:
21  std::string name() const override { return "CRC32"; }
22  size_t output_length() const override { return 4; }
23  HashFunction* clone() const override { return new CRC32; }
24  std::unique_ptr<HashFunction> copy_state() const override;
25 
26  void clear() override { m_crc = 0xFFFFFFFF; }
27 
28  CRC32() { clear(); }
29  ~CRC32() { clear(); }
30  private:
31  void add_data(const uint8_t[], size_t) override;
32  void final_result(uint8_t[]) override;
33  uint32_t m_crc;
34  };
35 
36 }
37 
38 #endif
void clear() override
Definition: crc32.h:26
size_t output_length() const override
Definition: crc32.h:22
#define BOTAN_PUBLIC_API(maj, min)
Definition: compiler.h:27
~CRC32()
Definition: crc32.h:29
std::string name() const override
Definition: crc32.h:21
Definition: alg_id.cpp:13
HashFunction * clone() const override
Definition: crc32.h:23