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