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108 lines
3.9 KiB
108 lines
3.9 KiB
// lea.h - written and placed in the public domain by Kim Sung Hee and Jeffrey Walton |
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// Based on "LEA: A 128-Bit Block Cipher for Fast Encryption on Common |
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// Processors" by Deukjo Hong, Jung-Keun Lee, Dong-Chan Kim, Daesung Kwon, |
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// Kwon Ho Ryu, and Dong-Geon Lee. |
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/// \file lea.h |
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/// \brief Classes for the LEA block cipher |
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/// \since Crypto++ 8.0 |
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#ifndef CRYPTOPP_LEA_H |
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#define CRYPTOPP_LEA_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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#include "algparam.h" |
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#if (CRYPTOPP_BOOL_X64 || CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X86 || CRYPTOPP_BOOL_ARM32 || CRYPTOPP_BOOL_ARMV8) |
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# ifndef CRYPTOPP_DISABLE_LEA_SIMD |
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# define CRYPTOPP_LEA_ADVANCED_PROCESS_BLOCKS 1 |
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# endif |
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#endif |
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// Yet another SunStudio/SunCC workaround. Failed self tests |
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// in SSE code paths on i386 for SunStudio 12.3 and below. |
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#if defined(__SUNPRO_CC) && (__SUNPRO_CC <= 0x5120) |
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# undef CRYPTOPP_LEA_ADVANCED_PROCESS_BLOCKS |
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#endif |
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NAMESPACE_BEGIN(CryptoPP) |
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/// \brief LEA block cipher information |
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/// \since Crypto++ 8.0 |
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struct LEA_Info : public FixedBlockSize<16>, public VariableKeyLength<16,16,32,8> |
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{ |
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/// \brief The algorithm name |
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/// \returns the algorithm name |
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/// \details StaticAlgorithmName returns the algorithm's name as a static |
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/// member function. |
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static const std::string StaticAlgorithmName() |
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{ |
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// Format is Cipher-Blocksize |
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return "LEA-128"; |
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} |
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}; |
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/// \brief LEA 128-bit block cipher |
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/// \details LEA provides 128-bit block size. The valid key size is 128-bits, 192-bits and 256-bits. |
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/// \note Crypto++ provides a byte oriented implementation |
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/// \sa <a href="http://www.cryptopp.com/wiki/LEA">LEA</a>, |
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/// <a href="https://seed.kisa.or.kr/html/egovframework/iwt/ds/ko/ref/LEA%20A%20128-Bit%20Block%20Cipher%20for%20Fast%20Encryption%20on%20Common%20Processors-English.pdf"> |
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/// LEA: A 128-Bit Block Cipher for Fast Encryption on Common Processors</a> |
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/// \since Crypto++ 8.0 |
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class CRYPTOPP_NO_VTABLE LEA : public LEA_Info, public BlockCipherDocumentation |
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{ |
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public: |
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/// \brief LEA block cipher transformation functions |
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/// \details Provides implementation common to encryption and decryption |
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/// \since Crypto++ 8.0 |
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class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<LEA_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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std::string AlgorithmProvider() const; |
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SecBlock<word32> m_rkey; |
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mutable SecBlock<word32> m_temp; |
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unsigned int m_rounds; |
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}; |
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/// \brief Encryption transformation |
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/// \details Enc provides implementation for encryption transformation. All key and block |
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/// sizes are supported. |
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/// \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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void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const; |
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#if CRYPTOPP_LEA_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 and block |
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/// sizes are supported. |
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/// \since Crypto++ 8.0 |
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class CRYPTOPP_NO_VTABLE Dec : public Base |
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{ |
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public: |
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void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const; |
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#if CRYPTOPP_LEA_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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typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption; |
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typedef BlockCipherFinal<DECRYPTION, Dec> Decryption; |
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}; |
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typedef LEA::Encryption LEAEncryption; |
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typedef LEA::Decryption LEADecryption; |
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NAMESPACE_END |
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#endif // CRYPTOPP_LEA_H
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