wake.h

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// wake.h - originally 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)
 
/// \brief WAKE stream cipher information
/// \tparam B Endianness of the stream cipher
/// \since Crypto++ 1.0
template <class B = BigEndian>
struct WAKE_OFB_Info : public FixedKeyLength<32>
{
    CRYPTOPP_STATIC_CONSTEXPR 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;
};
 
/// \brief WAKE stream cipher operation
/// \tparam B Endianness of the stream cipher
/// \since Crypto++ 1.0
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;}
};
 
/// \brief WAKE stream cipher
/// \tparam B Endianness of the stream cipher
/// \since Crypto++ 1.0
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;
};
 
NAMESPACE_END
 
#endif