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// serpent.h - originally written and placed in the public domain by Wei Dai
/// \file serpent.h
/// \brief Classes for the Serpent block cipher
/// \sa <a href="https://www.cl.cam.ac.uk/~rja14/serpent.html">A
/// Candidate Block Cipher for the Advanced Encryption Standard</a>
#ifndef CRYPTOPP_SERPENT_H
#define CRYPTOPP_SERPENT_H
#include "seckey.h"
#include "secblock.h"
NAMESPACE_BEGIN(CryptoPP)
/// \brief Serpent block cipher information
/// \since Crypto++ 3.1
struct Serpent_Info : public FixedBlockSize<16>, public VariableKeyLength<16, 16, 32, 8>, public FixedRounds<32>
{
CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() {return "Serpent";}
};
/// \brief Serpent block cipher
/// \sa <a href="http://www.cryptopp.com/wiki/Serpent">Serpent</a> on the
/// Crypto++ wiki, <a href="https://www.cl.cam.ac.uk/~rja14/serpent.html">A
/// Candidate Block Cipher for the Advanced Encryption Standard</a>
/// \since Crypto++ 3.1
class Serpent : public Serpent_Info, public BlockCipherDocumentation
{
/// \brief Serpen block cipher base implementation
/// \details Provides implementation common to encryption and decryption
/// \since Crypto++ 3.1
class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<Serpent_Info>
{
public:
void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs ¶ms);
protected:
FixedSizeSecBlock<word32, 33*4> m_key;
};
/// \brief Serpent encryption transformation
/// \details Enc provides the encryption transformation.
/// All key sizes are supported.
/// \since Crypto++ 3.1
class CRYPTOPP_NO_VTABLE Enc : public Base
{
public:
void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
};
/// \brief Serpent decryption transformation
/// \details Dec provides the decryption transformation.
/// All key sizes are supported.
/// \since Crypto++ 3.1
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 Serpent::Encryption SerpentEncryption;
typedef Serpent::Decryption SerpentDecryption;
NAMESPACE_END
#endif // CRYPTOPP_SERPENT_H
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