twofish.h
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// twofish.h - 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)
//! \class Twofish_Info
//! \brief Twofish block cipher information
struct Twofish_Info : public FixedBlockSize<16>, public VariableKeyLength<16, 16, 32, 8>, FixedRounds<16>
{
CRYPTOPP_CONSTEXPR static const char *StaticAlgorithmName() {return "Twofish";}
};
//! \class Twofish
//! \brief Twofish block cipher
//~ \sa <a href="http://www.weidai.com/scan-mirror/cs.html#Twofish">Twofish</a>
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
secblock.h
Classes and functions for secure memory allocations.
FixedBlockSize
Inherited by algorithms with fixed block size.
Definition: seckey.h:34
BlockCipherImpl
Provides a base implementation of Algorithm and SimpleKeyingInterface for block ciphers.
Definition: seckey.h:326
Twofish_Info
Twofish block cipher information.
Definition: twofish.h:16
BlockCipherDocumentation
Provides Encryption and Decryption typedefs used by derived classes to implement a block cipher.
Definition: seckey.h:423
seckey.h
Classes and functions for implementing secret key algorithms.
BlockCipherFinal< ENCRYPTION, Enc >
FixedSizeSecBlock< word32, 40 >
CryptoPP
Crypto++ library namespace.
BlockCipher
Interface for one direction (encryption or decryption) of a block cipher.
Definition: cryptlib.h:1091
Twofish
Twofish block cipher.
Definition: twofish.h:24
NameValuePairs
Interface for retrieving values given their names.
Definition: cryptlib.h:277
FixedRounds
Inherited by algorithms with fixed number of rounds.
Definition: seckey.h:47
VariableKeyLength
Inherited by keyed algorithms with variable key length.
Definition: seckey.h:177