cham.h

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// cham.h - written and placed in the public domain by Kim Sung Hee and Jeffrey Walton
//          Based on "CHAM: A Family of Lightweight Block Ciphers for
//          Resource-Constrained Devices" by Bonwook Koo, Dongyoung Roh,
//          Hyeonjin Kim, Younghoon Jung, Dong-Geon Lee, and Daesung Kwon
 
 
#ifndef CRYPTOPP_CHAM_H
#define CRYPTOPP_CHAM_H
 
#include "config.h"
#include "seckey.h"
#include "secblock.h"
#include "algparam.h"
 
#if (CRYPTOPP_BOOL_X64 || CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X86)
# define CRYPTOPP_CHAM128_ADVANCED_PROCESS_BLOCKS 1
#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_CHAM128_ADVANCED_PROCESS_BLOCKS
#endif
 
NAMESPACE_BEGIN(CryptoPP)
 
 
struct CHAM64_Info : public FixedBlockSize<8>, public FixedKeyLength<16>
{
    static const std::string StaticAlgorithmName()
    {
        // Format is Cipher-Blocksize
        return "CHAM-64";
    }
};
 
struct CHAM128_Info : public FixedBlockSize<16>, public VariableKeyLength<16,16,32,16>
{
    static const std::string StaticAlgorithmName()
    {
        // Format is Cipher-Blocksize
        return "CHAM-128";
    }
};
 
class CRYPTOPP_NO_VTABLE CHAM64 : public CHAM64_Info, public BlockCipherDocumentation
{
public:
    class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<CHAM64_Info>
    {
    protected:
        void UncheckedSetKey(const byte *userKey, unsigned int keyLength, const NameValuePairs &params);
 
        SecBlock<word16> m_rk;
        mutable FixedSizeSecBlock<word16, 4> m_x;
        unsigned int m_kw;
    };
 
    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;
};
 
typedef CHAM64::Encryption CHAM64Encryption;
typedef CHAM64::Decryption CHAM64Decryption;
 
class CRYPTOPP_NO_VTABLE CHAM128 : public CHAM128_Info, public BlockCipherDocumentation
{
public:
    class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<CHAM128_Info>
    {
    protected:
        void UncheckedSetKey(const byte *userKey, unsigned int keyLength, const NameValuePairs &params);
        std::string AlgorithmProvider() const;
 
        SecBlock<word32> m_rk;
        mutable FixedSizeSecBlock<word32, 4> m_x;
        unsigned int m_kw;
    };
 
    class CRYPTOPP_NO_VTABLE Enc : public Base
    {
    public:
        void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
 
#if CRYPTOPP_CHAM128_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_CHAM128_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 CHAM128::Encryption CHAM128Encryption;
typedef CHAM128::Decryption CHAM128Decryption;
 
NAMESPACE_END
 
#endif  // CRYPTOPP_CHAM_H