Crypto++  8.2
Free C++ class library of cryptographic schemes
tiger.h
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1 // tiger.h - originally written and placed in the public domain by Wei Dai
2 
3 /// \file tiger.h
4 /// \brief Classes for the Tiger message digest
5 /// \details Crypto++ provides the original Tiger hash that was
6 /// submitted to the NESSIE project. The implementation is different
7 /// from the revised Tiger2 hash.
8 /// \sa <a href="https://www.cryptopp.com/wiki/Tiger">Tiger</a> and
9 /// <a href="http://www.cs.technion.ac.il/~biham/Reports/Tiger/">Tiger:
10 /// A Fast New Cryptographic Hash Function</a>
11 /// \since Crypto++ 2.1
12 
13 #ifndef CRYPTOPP_TIGER_H
14 #define CRYPTOPP_TIGER_H
15 
16 #include "config.h"
17 #include "iterhash.h"
18 
19 // Clang 3.3 integrated assembler crash on Linux. Clang 3.4 due to compiler
20 // error with .intel_syntax, http://llvm.org/bugs/show_bug.cgi?id=24232
21 #if CRYPTOPP_BOOL_X32 || defined(CRYPTOPP_DISABLE_MIXED_ASM)
22 # define CRYPTOPP_DISABLE_TIGER_ASM 1
23 #endif
24 
25 NAMESPACE_BEGIN(CryptoPP)
26 
27 /// \brief Tiger message digest
28 /// \details Crypto++ provides the original Tiger hash that was
29 /// submitted to the NESSIE project. The implementation is different
30 /// from the revised Tiger2 hash.
31 /// \sa <a href="https://www.cryptopp.com/wiki/Tiger">Tiger</a> and
32 /// <a href="http://www.cs.technion.ac.il/~biham/Reports/Tiger/">Tiger:
33 /// A Fast New Cryptographic Hash Function</a>
34 /// \since Crypto++ 2.1
35 class Tiger : public IteratedHashWithStaticTransform<word64, LittleEndian, 64, 24, Tiger>
36 {
37 public:
38  CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() {return "Tiger";}
39  std::string AlgorithmProvider() const;
40 
41  /// \brief Initialize state array
42  /// \param state the state of the hash
43  static void InitState(HashWordType *state);
44  /// \brief Operate the hash
45  /// \param digest the state of the hash
46  /// \param data the data to be digested
47  static void Transform(word64 *digest, const word64 *data);
48  /// \brief Computes the hash of the current message
49  /// \param digest a pointer to the buffer to receive the hash
50  /// \param digestSize the size of the truncated digest, in bytes
51  /// \details TruncatedFinal() call Final() and then copies digestSize bytes to digest.
52  /// The hash is restarted the hash for the next message.
53  void TruncatedFinal(byte *digest, size_t digestSize);
54 
55 protected:
56  static const word64 table[4*256+3];
57 };
58 
59 NAMESPACE_END
60 
61 #endif
Tiger message digest.
Definition: tiger.h:35
Iterated hash with a static transformation function.
Definition: iterhash.h:177
Converts an enumeration to a type suitable for use as a template parameter.
Definition: cryptlib.h:135
Library configuration file.
Crypto++ library namespace.