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externals/cryptopp/twofish.h

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+// twofish.h - originally written and placed in the public domain by Wei Dai
+
+/// \file twofish.h
+/// \brief Classes for the Twofish block cipher
+
+#ifndef CRYPTOPP_TWOFISH_H
+#define CRYPTOPP_TWOFISH_H
+
+#include "seckey.h"
+#include "secblock.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+/// \brief Twofish block cipher information
+/// \since Crypto++ 3.1
+struct Twofish_Info : public FixedBlockSize<16>, public VariableKeyLength<16, 16, 32, 8>, FixedRounds<16>
+{
+	CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() {return "Twofish";}
+};
+
+/// \brief Twofish block cipher
+/// \sa <a href="http://www.cryptopp.com/wiki/Twofish">Twofish</a>
+/// \since Crypto++ 3.1
+class Twofish : public Twofish_Info, public BlockCipherDocumentation
+{
+	class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<Twofish_Info>
+	{
+	public:
+		void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs &params);
+
+	protected:
+		static word32 h0(word32 x, const word32 *key, unsigned int kLen);
+		static word32 h(word32 x, const word32 *key, unsigned int kLen);
+
+		static const byte q[2][256];
+		static const word32 mds[4][256];
+
+		FixedSizeSecBlock<word32, 40> m_k;
+		FixedSizeSecBlock<word32, 4*256> m_s;
+	};
+
+	class CRYPTOPP_NO_VTABLE Enc : public Base
+	{
+	public:
+		void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
+	};
+
+	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 Twofish::Encryption TwofishEncryption;
+typedef Twofish::Decryption TwofishDecryption;
+
+NAMESPACE_END
+
+#endif