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96 lines
3.9 KiB
96 lines
3.9 KiB
// 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 formely known as SMS4. |
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/// \details SM4 encryption is accelerated on machines with AES-NI. Decryption is not acclerated 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 formely 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 acclerated 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 acclerated 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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