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