65 lines
1.8 KiB
C++
65 lines
1.8 KiB
C++
// twofish.h - originally written and placed in the public domain by Wei Dai
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/// \file twofish.h
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/// \brief Classes for the Twofish block cipher
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#ifndef CRYPTOPP_TWOFISH_H
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#define CRYPTOPP_TWOFISH_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 Twofish block cipher information
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/// \since Crypto++ 3.1
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struct Twofish_Info : public FixedBlockSize<16>, public VariableKeyLength<16, 16, 32, 8>, FixedRounds<16>
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{
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CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() {return "Twofish";}
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};
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/// \brief Twofish block cipher
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/// \sa <a href="http://www.cryptopp.com/wiki/Twofish">Twofish</a>
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/// \since Crypto++ 3.1
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class Twofish : public Twofish_Info, public BlockCipherDocumentation
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{
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class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<Twofish_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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static word32 h0(word32 x, const word32 *key, unsigned int kLen);
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static word32 h(word32 x, const word32 *key, unsigned int kLen);
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static const byte q[2][256];
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static const word32 mds[4][256];
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FixedSizeSecBlock<word32, 40> m_k;
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FixedSizeSecBlock<word32, 4*256> m_s;
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};
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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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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 Twofish::Encryption TwofishEncryption;
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typedef Twofish::Decryption TwofishDecryption;
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NAMESPACE_END
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#endif
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