lea.h

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// lea.h - written and placed in the public domain by Kim Sung Hee and Jeffrey Walton
//         Based on "LEA: A 128-Bit Block Cipher for Fast Encryption on Common
//         Processors" by Deukjo Hong, Jung-Keun Lee, Dong-Chan Kim, Daesung Kwon,
//         Kwon Ho Ryu, and Dong-Geon Lee.
 
 
#ifndef CRYPTOPP_LEA_H
#define CRYPTOPP_LEA_H
 
#include "config.h"
#include "seckey.h"
#include "secblock.h"
#include "algparam.h"
 
#if (CRYPTOPP_BOOL_X64 || CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X86 || CRYPTOPP_BOOL_ARM32 || CRYPTOPP_BOOL_ARMV8)
# ifndef CRYPTOPP_DISABLE_LEA_SIMD
#  define CRYPTOPP_LEA_ADVANCED_PROCESS_BLOCKS 1
# endif
#endif
 
// Yet another SunStudio/SunCC workaround. Failed self tests
// in SSE code paths on i386 for SunStudio 12.3 and below.
#if defined(__SUNPRO_CC) && (__SUNPRO_CC <= 0x5120)
# undef CRYPTOPP_LEA_ADVANCED_PROCESS_BLOCKS
#endif
 
NAMESPACE_BEGIN(CryptoPP)
 
 
struct LEA_Info : public FixedBlockSize<16>, public VariableKeyLength<16,16,32,8>
{
    static const std::string StaticAlgorithmName()
    {
        // Format is Cipher-Blocksize
        return "LEA-128";
    }
};
 
class CRYPTOPP_NO_VTABLE LEA : public LEA_Info, public BlockCipherDocumentation
{
public:
    class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<LEA_Info>
    {
    protected:
        void UncheckedSetKey(const byte *userKey, unsigned int keyLength, const NameValuePairs &params);
        std::string AlgorithmProvider() const;
 
        SecBlock<word32> m_rkey;
        mutable SecBlock<word32> m_temp;
        unsigned int m_rounds;
    };
 
    class CRYPTOPP_NO_VTABLE Enc : public Base
    {
    public:
        void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
 
#if CRYPTOPP_LEA_ADVANCED_PROCESS_BLOCKS
        size_t AdvancedProcessBlocks(const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags) const;
#endif
    };
 
    class CRYPTOPP_NO_VTABLE Dec : public Base
    {
    public:
        void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
 
#if CRYPTOPP_LEA_ADVANCED_PROCESS_BLOCKS
        size_t AdvancedProcessBlocks(const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags) const;
#endif
    };
 
    typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
    typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
};
 
typedef LEA::Encryption LEAEncryption;
typedef LEA::Decryption LEADecryption;
 
NAMESPACE_END
 
#endif  // CRYPTOPP_LEA_H