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81 lines
2.8 KiB
C++
81 lines
2.8 KiB
C++
// skipjack.h - originally written and placed in the public domain by Wei Dai
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/// \file skipjack.h
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/// \brief Classes for the SKIPJACK block cipher
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/// \details The Crypto++ implementation conforms to SKIPJACK and KEA
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/// Algorithm Specifications published by NIST in May 1998. The library passes
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/// known answer tests available in NIST SP800-17, Table 6, pp. 140-42.
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/// \sa <a href ="http://csrc.nist.gov/encryption/skipjack/skipjack.pdf">SKIPJACK
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/// and KEA Algorithm Specifications</a> (May 1998),
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/// <a href="http://www.cryptopp.com/wiki/SKIPJACK">SKIPJACK</a> on the
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// Crypto++ wiki
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#ifndef CRYPTOPP_SKIPJACK_H
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#define CRYPTOPP_SKIPJACK_H
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#include "seckey.h"
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#include "secblock.h"
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NAMESPACE_BEGIN(CryptoPP)
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/// \brief SKIPJACK block cipher information
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struct SKIPJACK_Info : public FixedBlockSize<8>, public FixedKeyLength<10>
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{
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CRYPTOPP_DLL static const char * CRYPTOPP_API StaticAlgorithmName() {return "SKIPJACK";}
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};
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/// \brief SKIPJACK block cipher
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/// \details The Crypto++ implementation conforms to SKIPJACK and KEA
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/// Algorithm Specifications published by NIST in May 1998. The library passes
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/// known answer tests available in NIST SP800-17, Table 6, pp. 140-42.
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/// \sa <a href ="http://csrc.nist.gov/encryption/skipjack/skipjack.pdf">SKIPJACK
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/// and KEA Algorithm Specifications</a> (May 1998),
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/// <a href="http://www.cryptopp.com/wiki/SKIPJACK">SKIPJACK</a> on the
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/// Crypto++ wiki
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class SKIPJACK : public SKIPJACK_Info, public BlockCipherDocumentation
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{
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/// \brief SKIPJACK block cipher default operation
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class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<SKIPJACK_Info>
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{
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public:
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void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs ¶ms);
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unsigned int OptimalDataAlignment() const {return GetAlignmentOf<word16>();}
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protected:
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static const byte fTable[256];
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FixedSizeSecBlock<byte, 10*256> tab;
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};
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/// \brief SKIPJACK block cipher encryption operation
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class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE Enc : public Base
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{
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public:
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void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
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private:
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static const byte Se[256];
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static const word32 Te[4][256];
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};
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/// \brief SKIPJACK block cipher decryption operation
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class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE Dec : public Base
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{
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public:
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void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
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private:
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static const byte Sd[256];
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static const word32 Td[4][256];
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};
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public:
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typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
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typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
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};
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typedef SKIPJACK::Encryption SKIPJACKEncryption;
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typedef SKIPJACK::Decryption SKIPJACKDecryption;
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NAMESPACE_END
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#endif
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