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externals/cryptopp/serpent.h

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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 &params);
+
+	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