cast.h
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#ifndef CRYPTOPP_CAST_H
#define CRYPTOPP_CAST_H
/** \file
*/
#include "seckey.h"
#include "secblock.h"
NAMESPACE_BEGIN(CryptoPP)
class CAST
{
protected:
static const word32 S[8][256];
};
//! algorithm info
struct CAST128_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 5, 16>
{
static const char *StaticAlgorithmName() {return "CAST-128";}
};
/// <a href="http://www.weidai.com/scan-mirror/cs.html#CAST-128">CAST-128</a>
class CAST128 : public CAST128_Info, public BlockCipherDocumentation
{
class CRYPTOPP_NO_VTABLE Base : public CAST, public BlockCipherImpl<CAST128_Info>
{
public:
void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs &params);
protected:
bool reduced;
FixedSizeSecBlock<word32, 32> K;
};
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;
};
//! algorithm info
struct CAST256_Info : public FixedBlockSize<16>, public VariableKeyLength<16, 16, 32>
{
static const char *StaticAlgorithmName() {return "CAST-256";}
};
//! <a href="http://www.weidai.com/scan-mirror/cs.html#CAST-256">CAST-256</a>
class CAST256 : public CAST256_Info, public BlockCipherDocumentation
{
class CRYPTOPP_NO_VTABLE Base : public CAST, public BlockCipherImpl<CAST256_Info>
{
public:
void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs &params);
void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
protected:
static const word32 t_m[8][24];
static const unsigned int t_r[8][24];
static void Omega(int i, word32 kappa[8]);
FixedSizeSecBlock<word32, 8*12> K;
};
public:
typedef BlockCipherFinal<ENCRYPTION, Base> Encryption;
typedef BlockCipherFinal<DECRYPTION, Base> Decryption;
};
typedef CAST128::Encryption CAST128Encryption;
typedef CAST128::Decryption CAST128Decryption;
typedef CAST256::Encryption CAST256Encryption;
typedef CAST256::Decryption CAST256Decryption;
NAMESPACE_END
#endif
BlockCipherDocumentation
These objects usually should not be used directly. See CipherModeDocumentation instead.
Definition: seckey.h:188
CAST128
CAST-128
Definition: cast.h:25
FixedBlockSize
to be inherited by block ciphers with fixed block size
Definition: seckey.h:21
CAST256
CAST-256
Definition: cast.h:61
BlockCipherFinal< ENCRYPTION, Enc >
FixedSizeSecBlock< word32, 32 >
CAST
Definition: cast.h:12
VariableKeyLength
support query of variable key length, template parameters are default, min, max, multiple (default mu...
Definition: seckey.h:80
CAST256_Info
algorithm info
Definition: cast.h:55
BlockCipherImpl
Definition: seckey.h:143
CAST128_Info
algorithm info
Definition: cast.h:19
NameValuePairs
interface for retrieving values given their names
Definition: cryptlib.h:224