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
BlockCipherFinal
Provides class member functions to key a block cipher.
Definition seckey.h:318
BlockCipherImpl
Provides a base implementation of Algorithm and SimpleKeyingInterface for block ciphers.
Definition seckey.h:306
FixedBlockSize
Inherited by algorithms with fixed block size.
Definition seckey.h:41
FixedRounds
Inherited by algorithms with fixed number of rounds.
Definition seckey.h:53
FixedSizeSecBlock
Fixed size stack-based SecBlock.
Definition secblock.h:1246
NameValuePairs
Interface for retrieving values given their names.
Definition cryptlib.h:327
Twofish
Twofish block cipher.
Definition twofish.h:25
VariableKeyLength
Inherited by keyed algorithms with variable key length.
Definition seckey.h:166
word32
unsigned int word32
32-bit unsigned datatype
Definition config_int.h:72
CryptoPP
Crypto++ library namespace.
secblock.h
Classes and functions for secure memory allocations.
seckey.h
Classes and functions for implementing secret key algorithms.
BlockCipherDocumentation
Provides Encryption and Decryption typedefs used by derived classes to implement a block cipher.
Definition seckey.h:399
Twofish_Info
Twofish block cipher information.
Definition twofish.h:17