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97 lines
3.9 KiB
C++
97 lines
3.9 KiB
C++
// sm4.h - written and placed in the public domain by Jeffrey Walton and Han Lulu
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/// \file sm4.h
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/// \brief Classes for the SM4 block cipher
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/// \details SM4 is a block cipher designed by Xiaoyun Wang, et al. The block cipher is part of the
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/// Chinese State Cryptography Administration portfolio. The cipher was formerly known as SMS4.
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/// \details SM4 encryption is accelerated on machines with AES-NI. Decryption is not accelerated because
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/// it is not profitable. Thanks to Markku-Juhani Olavi Saarinen for help and the code.
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/// \sa <A HREF="http://eprint.iacr.org/2008/329.pdf">SMS4 Encryption Algorithm for Wireless Networks</A>,
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/// <A HREF="http://github.com/guanzhi/GmSSL">Reference implementation using OpenSSL</A> and
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/// <A HREF="https://github.com/mjosaarinen/sm4ni">Markku-Juhani Olavi Saarinen GitHub</A>.
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/// \since Crypto++ 6.0
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#ifndef CRYPTOPP_SM4_H
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#define CRYPTOPP_SM4_H
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#include "config.h"
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#include "seckey.h"
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#include "secblock.h"
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#if (CRYPTOPP_BOOL_X64 || CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X86)
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# ifndef CRYPTOPP_DISABLE_SM4_SIMD
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# define CRYPTOPP_SM4_ADVANCED_PROCESS_BLOCKS 1
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# endif
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#endif
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NAMESPACE_BEGIN(CryptoPP)
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/// \brief SM4 block cipher information
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/// \since Crypto++ 6.0
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struct SM4_Info : public FixedBlockSize<16>, FixedKeyLength<16>
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{
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static const std::string StaticAlgorithmName()
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{
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return "SM4";
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}
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};
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/// \brief Classes for the SM4 block cipher
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/// \details SM4 is a block cipher designed by Xiaoyun Wang, et al. The block cipher is part of the
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/// Chinese State Cryptography Administration portfolio. The cipher was formerly known as SMS4.
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/// \sa <A HREF="http://eprint.iacr.org/2008/329.pdf">SMS4 Encryption Algorithm for Wireless Networks</A>
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/// \since Crypto++ 6.0
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class CRYPTOPP_NO_VTABLE SM4 : public SM4_Info, public BlockCipherDocumentation
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{
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public:
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/// \brief SM4 block cipher transformation functions
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/// \details Provides implementation common to encryption and decryption
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/// \since Crypto++ 6.0
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class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<SM4_Info>
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{
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protected:
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void UncheckedSetKey(const byte *userKey, unsigned int keyLength, const NameValuePairs ¶ms);
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SecBlock<word32, AllocatorWithCleanup<word32> > m_rkeys;
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mutable SecBlock<word32, AllocatorWithCleanup<word32> > m_wspace;
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};
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/// \brief Encryption transformation
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/// \details Enc provides implementation for encryption transformation. All key
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/// sizes are supported.
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/// \details SM4 encryption is accelerated on machines with AES-NI. Decryption is
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/// not accelerated because it is not profitable. Thanks to Markku-Juhani Olavi
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/// Saarinen.
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/// \since Crypto++ 6.0, AESNI encryption since Crypto++ 8.0
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class CRYPTOPP_NO_VTABLE Enc : public Base
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{
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public:
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std::string AlgorithmProvider() const;
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protected:
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void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
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#if CRYPTOPP_SM4_ADVANCED_PROCESS_BLOCKS
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size_t AdvancedProcessBlocks(const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags) const;
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#endif
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};
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/// \brief Decryption transformation
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/// \details Dec provides implementation for decryption transformation. All key
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/// sizes are supported.
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/// \details SM4 encryption is accelerated on machines with AES-NI. Decryption is
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/// not accelerated because it is not profitable. Thanks to Markku-Juhani Olavi
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/// Saarinen.
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/// \since Crypto++ 6.0
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class CRYPTOPP_NO_VTABLE Dec : public Base
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{
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protected:
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void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
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};
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typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
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typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
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};
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NAMESPACE_END
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#endif // CRYPTOPP_SM4_H
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