Crypto++  5.6.5
Free C++ class library of cryptographic schemes
twofish.h
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1 // twofish.h - written and placed in the public domain by Wei Dai
2 
3 //! \file twofish.h
4 //! \brief Classes for the Twofish block cipher
5 
6 #ifndef CRYPTOPP_TWOFISH_H
7 #define CRYPTOPP_TWOFISH_H
8 
9 #include "seckey.h"
10 #include "secblock.h"
11 
12 NAMESPACE_BEGIN(CryptoPP)
13 
14 //! \class Twofish_Info
15 //! \brief Twofish block cipher information
16 struct Twofish_Info : public FixedBlockSize<16>, public VariableKeyLength<16, 16, 32, 8>, FixedRounds<16>
17 {
18  CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() {return "Twofish";}
19 };
20 
21 //! \class Twofish
22 //! \brief Twofish block cipher
23 //~ \sa <a href="http://www.weidai.com/scan-mirror/cs.html#Twofish">Twofish</a>
25 {
26  class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<Twofish_Info>
27  {
28  public:
29  void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs &params);
30 
31  protected:
32  static word32 h0(word32 x, const word32 *key, unsigned int kLen);
33  static word32 h(word32 x, const word32 *key, unsigned int kLen);
34 
35  static const byte q[2][256];
36  static const word32 mds[4][256];
37 
40  };
41 
42  class CRYPTOPP_NO_VTABLE Enc : public Base
43  {
44  public:
45  void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
46  };
47 
48  class CRYPTOPP_NO_VTABLE Dec : public Base
49  {
50  public:
51  void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
52  };
53 
54 public:
57 };
58 
61 
62 NAMESPACE_END
63 
64 #endif
Provides Encryption and Decryption typedefs used by derived classes to implement a block cipher...
Definition: seckey.h:408
Interface for one direction (encryption or decryption) of a block cipher.
Definition: cryptlib.h:1095
Classes and functions for secure memory allocations.
Inherited by algorithms with fixed block size.
Definition: seckey.h:40
Twofish block cipher.
Definition: twofish.h:24
Twofish block cipher information.
Definition: twofish.h:16
Classes and functions for implementing secret key algorithms.
Inherited by algorithms with fixed number of rounds.
Definition: seckey.h:53
Inherited by keyed algorithms with variable key length.
Definition: seckey.h:169
Provides a base implementation of Algorithm and SimpleKeyingInterface for block ciphers.
Definition: seckey.h:311
Crypto++ library namespace.
Interface for retrieving values given their names.
Definition: cryptlib.h:279