// sm4.h - written and placed in the public domain by Jeffrey Walton and Han Lulu
//! \file sm4.h
//! \brief Classes for the SM4 block cipher
//! \details SM4 is a Chinese national block cipher. The cipher was formally known as SMS4.
//! \sa SMS4 Encryption Algorithm for Wireless Networks
//! \since Crypto++ 6.0
#ifndef CRYPTOPP_SM4_H
#define CRYPTOPP_SM4_H
#include "config.h"
#include "seckey.h"
#include "secblock.h"
NAMESPACE_BEGIN(CryptoPP)
//! \class SM4_Info
//! \brief SM4 block cipher information
//! \since Crypto++ 6.0
struct SM4_Info : public FixedBlockSize<16>, FixedKeyLength<16>
{
static const std::string StaticAlgorithmName()
{
return "SM4";
}
};
//! \class SM4
//! \brief Classes for the SM4 block cipher
//! \details SM4 is a Chinese national block cipher. The cipher was formally known as SMS4.
//! \sa SMS4 Encryption Algorithm for Wireless Networks
//! \since Crypto++ 6.0
class CRYPTOPP_NO_VTABLE SM4 : public SM4_Info, public BlockCipherDocumentation
{
public:
//! \brief SM4 block cipher transformation functions
//! \details Provides implementation common to encryption and decryption
//! \since Crypto++ 6.0
class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl
{
protected:
void UncheckedSetKey(const byte *userKey, unsigned int keyLength, const NameValuePairs ¶ms);
protected:
SecBlock > m_rkeys;
mutable SecBlock > m_wspace;
};
//! \brief Provides implementation for encryption transformation
//! \details Enc provides implementation for encryption transformation. All key
//! sizes are supported.
//! \since Crypto++ 6.0
class CRYPTOPP_NO_VTABLE Enc : public Base
{
protected:
void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
};
//! \brief Provides implementation for encryption transformation
//! \details Dec provides implementation for decryption transformation. All key
//! sizes are supported.
//! \since Crypto++ 6.0
class CRYPTOPP_NO_VTABLE Dec : public Base
{
protected:
void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
};
typedef BlockCipherFinal Encryption;
typedef BlockCipherFinal Decryption;
};
NAMESPACE_END
#endif // CRYPTOPP_SM4_H