Crypto++  8.2
Free C++ class library of cryptographic schemes
skipjack.h
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1 // skipjack.h - originally written and placed in the public domain by Wei Dai
2 
3 /// \file skipjack.h
4 /// \brief Classes for the SKIPJACK block cipher
5 /// \details The Crypto++ implementation conforms to SKIPJACK and KEA
6 /// Algorithm Specifications published by NIST in May 1998. The library passes
7 /// known answer tests available in NIST SP800-17, Table 6, pp. 140-42.
8 /// \sa <a href ="http://csrc.nist.gov/encryption/skipjack/skipjack.pdf">SKIPJACK
9 /// and KEA Algorithm Specifications</a> (May 1998),
10 /// <a href="http://www.cryptopp.com/wiki/SKIPJACK">SKIPJACK</a> on the
11 // Crypto++ wiki
12 
13 #ifndef CRYPTOPP_SKIPJACK_H
14 #define CRYPTOPP_SKIPJACK_H
15 
16 #include "seckey.h"
17 #include "secblock.h"
18 
19 NAMESPACE_BEGIN(CryptoPP)
20 
21 /// \brief SKIPJACK block cipher information
22 struct SKIPJACK_Info : public FixedBlockSize<8>, public FixedKeyLength<10>
23 {
24  CRYPTOPP_DLL static const char * CRYPTOPP_API StaticAlgorithmName() {return "SKIPJACK";}
25 };
26 
27 /// \brief SKIPJACK block cipher
28 /// \details The Crypto++ implementation conforms to SKIPJACK and KEA
29 /// Algorithm Specifications published by NIST in May 1998. The library passes
30 /// known answer tests available in NIST SP800-17, Table 6, pp. 140-42.
31 /// \sa <a href ="http://csrc.nist.gov/encryption/skipjack/skipjack.pdf">SKIPJACK
32 /// and KEA Algorithm Specifications</a> (May 1998),
33 /// <a href="http://www.cryptopp.com/wiki/SKIPJACK">SKIPJACK</a> on the
34 /// Crypto++ wiki
36 {
37  /// \brief SKIPJACK block cipher default operation
38  class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<SKIPJACK_Info>
39  {
40  public:
41  void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs &params);
42  unsigned int OptimalDataAlignment() const {return GetAlignmentOf<word16>();}
43 
44  protected:
45  static const byte fTable[256];
46 
48  };
49 
50  /// \brief SKIPJACK block cipher encryption operation
51  class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE Enc : public Base
52  {
53  public:
54  void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
55  private:
56  static const byte Se[256];
57  static const word32 Te[4][256];
58  };
59 
60  /// \brief SKIPJACK block cipher decryption operation
61  class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE Dec : public Base
62  {
63  public:
64  void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
65  private:
66  static const byte Sd[256];
67  static const word32 Td[4][256];
68  };
69 
70 public:
73 };
74 
77 
78 NAMESPACE_END
79 
80 #endif
Inherited by keyed algorithms with fixed key length.
Definition: seckey.h:124
Provides Encryption and Decryption typedefs used by derived classes to implement a block cipher.
Definition: seckey.h:398
SKIPJACK block cipher information.
Definition: skipjack.h:22
Interface for one direction (encryption or decryption) of a block cipher.
Definition: cryptlib.h:1279
Classes and functions for secure memory allocations.
Inherited by algorithms with fixed block size.
Definition: seckey.h:40
Classes and functions for implementing secret key algorithms.
Provides a base implementation of Algorithm and SimpleKeyingInterface for block ciphers.
Definition: seckey.h:305
SKIPJACK block cipher.
Definition: skipjack.h:35
Crypto++ library namespace.
Interface for retrieving values given their names.
Definition: cryptlib.h:321