File: wake.h

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// wake.h - written and placed in the public domain by Wei Dai

//! \file wake.h
//! \brief Classes for WAKE stream cipher

#ifndef CRYPTOPP_WAKE_H
#define CRYPTOPP_WAKE_H

#include "seckey.h"
#include "secblock.h"
#include "strciphr.h"

NAMESPACE_BEGIN(CryptoPP)

//! \class WAKE_OFB_Info
//! \brief WAKE stream cipher information
//! \tparam B Endianess of the stream cipher
template <class B = BigEndian>
struct WAKE_OFB_Info : public FixedKeyLength<32>
{
	CRYPTOPP_CONSTEXPR static const char *StaticAlgorithmName() {return B::ToEnum() == LITTLE_ENDIAN_ORDER ? "WAKE-OFB-LE" : "WAKE-OFB-BE";}
};

class CRYPTOPP_NO_VTABLE WAKE_Base
{
protected:
	word32 M(word32 x, word32 y);
	void GenKey(word32 k0, word32 k1, word32 k2, word32 k3);

	word32 t[257];
	word32 r3, r4, r5, r6;
};

//! \class WAKE_Policy
//! \brief WAKE stream cipher operation
//! \tparam B Endianess of the stream cipher
template <class B = BigEndian>
class CRYPTOPP_NO_VTABLE WAKE_Policy : public AdditiveCipherConcretePolicy<word32, 1, 64>, protected WAKE_Base
{
protected:
	void CipherSetKey(const NameValuePairs &params, const byte *key, size_t length);
	// OFB
	void OperateKeystream(KeystreamOperation operation, byte *output, const byte *input, size_t iterationCount);
	bool CipherIsRandomAccess() const {return false;}
};

//! \class WAKE_OFB
//! \brief WAKE stream cipher
//! \tparam B Endianess of the stream cipher
template <class B = BigEndian>
struct WAKE_OFB : public WAKE_OFB_Info<B>, public SymmetricCipherDocumentation
{
	typedef SymmetricCipherFinal<ConcretePolicyHolder<WAKE_Policy<B>, AdditiveCipherTemplate<> >,  WAKE_OFB_Info<B> > Encryption;
	typedef Encryption Decryption;
};

/*
template <class B = BigEndian>
class WAKE_ROFB_Policy : public WAKE_Policy<B>
{
protected:
	void Iterate(KeystreamOperation operation, byte *output, const byte *input, unsigned int iterationCount);
};

template <class B = BigEndian>
struct WAKE_ROFB : public WAKE_Info<B>
{
	typedef SymmetricCipherTemplate<ConcretePolicyHolder<AdditiveCipherTemplate<>, WAKE_ROFB_Policy<B> > > Encryption;
	typedef Encryption Decryption;
};
*/

NAMESPACE_END

#endif