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 { StaticAlgorithmNameSKIPJACK_Info24 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 35 class SKIPJACK : public SKIPJACK_Info, public BlockCipherDocumentation 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 ¶ms); OptimalDataAlignment()42 unsigned int OptimalDataAlignment() const {return GetAlignmentOf<word16>();} 43 44 protected: 45 static const byte fTable[256]; 46 47 FixedSizeSecBlock<byte, 10*256> tab; 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: 71 typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption; 72 typedef BlockCipherFinal<DECRYPTION, Dec> Decryption; 73 }; 74 75 typedef SKIPJACK::Encryption SKIPJACKEncryption; 76 typedef SKIPJACK::Decryption SKIPJACKDecryption; 77 78 NAMESPACE_END 79 80 #endif 81