shark.h

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// shark.h - originally written and placed in the public domain by Wei Dai
 
/// \file shark.h
/// \brief Classes for the SHARK block cipher
/// \since Crypto++ 2.1
 
#ifndef CRYPTOPP_SHARK_H
#define CRYPTOPP_SHARK_H
 
#include "config.h"
#include "seckey.h"
#include "secblock.h"
 
NAMESPACE_BEGIN(CryptoPP)
 
/// \brief SHARK block cipher information
/// \since Crypto++ 2.1
struct SHARK_Info : public FixedBlockSize<8>, public FixedKeyLength<16>, public VariableRounds<6, 2>
{
    CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() {return "SHARK-E";}
};
 
/// \brief SHARK block cipher
/// <a href="http://www.cryptopp.com/wiki/SHARK-E">SHARK-E</a>
/// \since Crypto++ 2.1
class SHARK : public SHARK_Info, public BlockCipherDocumentation
{
    /// \brief SHARK block cipher default operation
    /// \since Crypto++ 2.1
    class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<SHARK_Info>
    {
    public:
        void UncheckedSetKey(const byte *key, unsigned int length, const NameValuePairs &param);
 
    protected:
        unsigned int m_rounds;
        SecBlock<word64> m_roundKeys;
    };
 
    /// \brief SHARK block cipher encryption operation
    /// \since Crypto++ 2.1
    class CRYPTOPP_NO_VTABLE Enc : public Base
    {
    public:
        void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
 
        // used by Base to do key setup
        void InitForKeySetup();
 
    private:
        static const byte sbox[256];
        static const word64 cbox[8][256];
    };
 
    /// \brief SHARK block cipher decryption operation
    /// \since Crypto++ 2.1
    class CRYPTOPP_NO_VTABLE Dec : public Base
    {
    public:
        void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
 
    private:
        static const byte sbox[256];
        static const word64 cbox[8][256];
    };
 
public:
    typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
    typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
};
 
typedef SHARK::Encryption SHARKEncryption;
typedef SHARK::Decryption SHARKDecryption;
 
NAMESPACE_END
 
#endif