speck.h

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// speck.h - written and placed in the public domain by Jeffrey Walton
 
 
#ifndef CRYPTOPP_SPECK_H
#define CRYPTOPP_SPECK_H
 
#include "config.h"
#include "seckey.h"
#include "secblock.h"
 
#if CRYPTOPP_BOOL_X64 || CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X86 || \
    CRYPTOPP_BOOL_ARM32 || CRYPTOPP_BOOL_ARMV8 || \
    CRYPTOPP_BOOL_PPC32 || CRYPTOPP_BOOL_PPC64
# ifndef CRYPTOPP_DISABLE_SPECK_SIMD
#  define CRYPTOPP_SPECK128_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_SPECK128_ADVANCED_PROCESS_BLOCKS
#endif
 
NAMESPACE_BEGIN(CryptoPP)
 
 
template <unsigned int L, unsigned int D, unsigned int N, unsigned int M>
struct SPECK_Info : public FixedBlockSize<L>, VariableKeyLength<D, N, M>
{
    static const std::string StaticAlgorithmName()
    {
        // Format is Cipher-Blocksize(Keylength)
        return "SPECK-" + IntToString(L*8);
    }
};
 
template <class W>
struct SPECK_Base
{
    virtual ~SPECK_Base() {}
    SPECK_Base() : m_kwords(0), m_rounds(0) {}
 
    typedef SecBlock<W, AllocatorWithCleanup<W, true> > AlignedSecBlock;
    mutable AlignedSecBlock m_wspace;  // workspace
    AlignedSecBlock         m_rkeys;   // round keys
    unsigned int            m_kwords;  // number of key words
    unsigned int            m_rounds;  // number of rounds
};
 
class CRYPTOPP_NO_VTABLE SPECK64 : public SPECK_Info<8, 12, 12, 16>, public BlockCipherDocumentation
{
public:
    class CRYPTOPP_NO_VTABLE Base : protected SPECK_Base<word32>, public BlockCipherImpl<SPECK_Info<8, 12, 12, 16> >
    {
    public:
        std::string AlgorithmName() const {
            return StaticAlgorithmName() + (m_kwords == 0 ? "" :
                "(" + IntToString(m_kwords*sizeof(word32)*8) + ")");
        }
 
        std::string AlgorithmProvider() const;
 
        unsigned int OptimalDataAlignment() const;
 
    protected:
        void UncheckedSetKey(const byte *userKey, unsigned int keyLength, const NameValuePairs &params);
    };
 
    class CRYPTOPP_NO_VTABLE Enc : public Base
    {
    public:
        void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
    };
 
    class CRYPTOPP_NO_VTABLE Dec : public Base
    {
    public:
        void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
    };
 
    typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
    typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
};
 
class CRYPTOPP_NO_VTABLE SPECK128 : public SPECK_Info<16, 16, 16, 32>, public BlockCipherDocumentation
{
public:
    class CRYPTOPP_NO_VTABLE Base : protected SPECK_Base<word64>, public BlockCipherImpl<SPECK_Info<16, 16, 16, 32> >
    {
    public:
        std::string AlgorithmName() const {
            return StaticAlgorithmName() + (m_kwords == 0 ? "" :
                "(" + IntToString(m_kwords*sizeof(word64)*8) + ")");
        }
 
        std::string AlgorithmProvider() const;
 
        unsigned int OptimalDataAlignment() const;
 
    protected:
        void UncheckedSetKey(const byte *userKey, unsigned int keyLength, const NameValuePairs &params);
    };
 
    class CRYPTOPP_NO_VTABLE Enc : public Base
    {
    public:
        void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
#if CRYPTOPP_SPECK128_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_SPECK128_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;
};
 
NAMESPACE_END
 
#endif  // CRYPTOPP_SPECK_H