3way.h

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// 3way.h - originally written and placed in the public domain by Wei Dai
 
/// \file 3way.h
/// \brief Classes for the 3-Way block cipher
 
#ifndef CRYPTOPP_THREEWAY_H
#define CRYPTOPP_THREEWAY_H
 
#include "config.h"
#include "seckey.h"
#include "secblock.h"
 
NAMESPACE_BEGIN(CryptoPP)
 
/// \brief ThreeWay block cipher information
struct ThreeWay_Info : public FixedBlockSize<12>, public FixedKeyLength<12>, public VariableRounds<11>
{
    CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() {return "3-Way";}
};
 
/// \brief ThreeWay block cipher
/// \sa <a href="http://www.cryptopp.com/wiki/3-Way">3-Way</a>
class ThreeWay : public ThreeWay_Info, public BlockCipherDocumentation
{
    /// \brief Class specific implementation and overrides used to operate the cipher.
    /// \details Implementations and overrides in \p Base apply to both \p ENCRYPTION and \p DECRYPTION directions
    class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<ThreeWay_Info>
    {
    public:
        void UncheckedSetKey(const byte *key, unsigned int length, const NameValuePairs &params);
 
    protected:
        unsigned int m_rounds;
        FixedSizeSecBlock<word32, 3> m_k;
    };
 
    /// \brief Class specific methods used to operate the cipher in the forward direction.
    /// \details Implementations and overrides in \p Enc apply to \p ENCRYPTION.
    class CRYPTOPP_NO_VTABLE Enc : public Base
    {
    public:
        void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
    };
 
    /// \brief Class specific methods used to operate the cipher in the reverse direction.
    /// \details Implementations and overrides in \p Dec apply to \p DECRYPTION.
    class CRYPTOPP_NO_VTABLE Dec : public Base
    {
    public:
        void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
    };
 
public:
    typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
    typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
};
 
typedef ThreeWay::Encryption ThreeWayEncryption;
typedef ThreeWay::Decryption ThreeWayDecryption;
 
NAMESPACE_END
 
#endif