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// 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 block cipher designed by Xiaoyun Wang, et al. The block cipher is part of the
/// Chinese State Cryptography Administration portfolio. The cipher was formerly known as SMS4.
/// \details SM4 encryption is accelerated on machines with AES-NI. Decryption is not accelerated because
/// it is not profitable. Thanks to Markku-Juhani Olavi Saarinen for help and the code.
/// \sa <A HREF="http://eprint.iacr.org/2008/329.pdf">SMS4 Encryption Algorithm for Wireless Networks</A>,
/// <A HREF="http://github.com/guanzhi/GmSSL">Reference implementation using OpenSSL</A> and
/// <A HREF="https://github.com/mjosaarinen/sm4ni">Markku-Juhani Olavi Saarinen GitHub</A>.
/// \since Crypto++ 6.0
#ifndef CRYPTOPP_SM4_H
#define CRYPTOPP_SM4_H
#include "config.h"
#include "seckey.h"
#include "secblock.h"
#if (CRYPTOPP_BOOL_X64 || CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X86)
# ifndef CRYPTOPP_DISABLE_SM4_SIMD
# define CRYPTOPP_SM4_ADVANCED_PROCESS_BLOCKS 1
# endif
#endif
NAMESPACE_BEGIN(CryptoPP)
/// \brief SM4 block cipher information
/// \since Crypto++ 6.0
struct SM4_Info : public FixedBlockSize<16>, FixedKeyLength<16>
{
static const std::string StaticAlgorithmName()
{
return "SM4";
}
};
/// \brief Classes for the SM4 block cipher
/// \details SM4 is a block cipher designed by Xiaoyun Wang, et al. The block cipher is part of the
/// Chinese State Cryptography Administration portfolio. The cipher was formerly known as SMS4.
/// \sa <A HREF="http://eprint.iacr.org/2008/329.pdf">SMS4 Encryption Algorithm for Wireless Networks</A>
/// \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<SM4_Info>
{
protected:
void UncheckedSetKey(const byte *userKey, unsigned int keyLength, const NameValuePairs ¶ms);
SecBlock<word32, AllocatorWithCleanup<word32> > m_rkeys;
mutable SecBlock<word32, AllocatorWithCleanup<word32> > m_wspace;
};
/// \brief Encryption transformation
/// \details Enc provides implementation for encryption transformation. All key
/// sizes are supported.
/// \details SM4 encryption is accelerated on machines with AES-NI. Decryption is
/// not accelerated because it is not profitable. Thanks to Markku-Juhani Olavi
/// Saarinen.
/// \since Crypto++ 6.0, AESNI encryption since Crypto++ 8.0
class CRYPTOPP_NO_VTABLE Enc : public Base
{
public:
std::string AlgorithmProvider() const;
protected:
void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
#if CRYPTOPP_SM4_ADVANCED_PROCESS_BLOCKS
size_t AdvancedProcessBlocks(const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags) const;
#endif
};
/// \brief Decryption transformation
/// \details Dec provides implementation for decryption transformation. All key
/// sizes are supported.
/// \details SM4 encryption is accelerated on machines with AES-NI. Decryption is
/// not accelerated because it is not profitable. Thanks to Markku-Juhani Olavi
/// Saarinen.
/// \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, Enc> Encryption;
typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
};
NAMESPACE_END
#endif // CRYPTOPP_SM4_H
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