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109 lines
3.9 KiB
C++
109 lines
3.9 KiB
C++
// 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 Encryption 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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