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#ifndef CRYPTOPP_RC2_H
#define CRYPTOPP_RC2_H
/** \file
*/
#include "seckey.h"
#include "secblock.h"
NAMESPACE_BEGIN(CryptoPP)
//! _
struct RC2_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 1, 128>
{
enum {DEFAULT_EFFECTIVE_KEYLENGTH = 1024, MAX_EFFECTIVE_KEYLENGTH = 1024};
static const char *StaticAlgorithmName() {return "RC2";}
};
/// <a href="http://www.weidai.com/scan-mirror/cs.html#RC2">RC2</a>
class RC2 : public RC2_Info, public BlockCipherDocumentation
{
class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<RC2_Info>
{
public:
void UncheckedSetKey(CipherDir direction, const byte *key, unsigned int length, unsigned int effectiveKeyLength);
void SetKeyWithEffectiveKeyLength(const byte *key, size_t length, unsigned int effectiveKeyLength);
protected:
template <class T>
static inline void CheckedSetKey(T *obj, CipherDir dir, const byte *key, size_t length, const NameValuePairs ¶m)
{
obj->ThrowIfInvalidKeyLength(length);
int effectiveKeyLength = param.GetIntValueWithDefault("EffectiveKeyLength", DEFAULT_EFFECTIVE_KEYLENGTH);
obj->SetKeyWithEffectiveKeyLength(key, length, effectiveKeyLength);
}
FixedSizeSecBlock<word16, 64> K; // expanded key table
};
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:
class Encryption : public BlockCipherFinal<ENCRYPTION, Enc>
{
public:
Encryption() {}
Encryption(const byte *key, size_t keyLen=DEFAULT_KEYLENGTH, unsigned int effectiveLen=1024)
{SetKeyWithEffectiveKeyLength(key, keyLen, effectiveLen);}
};
class Decryption : public BlockCipherFinal<DECRYPTION, Dec>
{
public:
Decryption() {}
Decryption(const byte *key, size_t keyLen=DEFAULT_KEYLENGTH, unsigned int effectiveLen=1024)
{SetKeyWithEffectiveKeyLength(key, keyLen, effectiveLen);}
};
};
typedef RC2::Encryption RC2Encryption;
typedef RC2::Decryption RC2Decryption;
NAMESPACE_END
#endif
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