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181 lines
6.6 KiB
181 lines
6.6 KiB
![]()
4 years ago
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// cham.h - written and placed in the public domain by Kim Sung Hee and Jeffrey Walton
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// Based on "CHAM: A Family of Lightweight Block Ciphers for
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// Resource-Constrained Devices" by Bonwook Koo, Dongyoung Roh,
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// Hyeonjin Kim, Younghoon Jung, Dong-Geon Lee, and Daesung Kwon
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/// \file cham.h
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/// \brief Classes for the CHAM block cipher
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/// \since Crypto++ 8.0
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#ifndef CRYPTOPP_CHAM_H
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#define CRYPTOPP_CHAM_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)
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# define CRYPTOPP_CHAM128_ADVANCED_PROCESS_BLOCKS 1
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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_CHAM128_ADVANCED_PROCESS_BLOCKS
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#endif
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NAMESPACE_BEGIN(CryptoPP)
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/// \brief CHAM block cipher information
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/// \since Crypto++ 8.0
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struct CHAM64_Info : public FixedBlockSize<8>, public FixedKeyLength<16>
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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 "CHAM-64";
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}
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};
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/// \brief CHAM block cipher information
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/// \since Crypto++ 8.0
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struct CHAM128_Info : public FixedBlockSize<16>, public VariableKeyLength<16,16,32,16>
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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 "CHAM-128";
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}
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};
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/// \brief CHAM 64-bit block cipher
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/// \details CHAM64 provides 64-bit block size. The valid key size is 128-bit.
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/// \note Crypto++ provides a byte oriented implementation
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/// \sa CHAM128, <a href="http://www.cryptopp.com/wiki/CHAM">CHAM</a>,
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/// <a href="https://pdfs.semanticscholar.org/2f57/61b5c2614cffd58a09cc83c375a2b32a2ed3.pdf">
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/// CHAM: A Family of Lightweight Block Ciphers for Resource-Constrained Devices</a>
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/// \since Crypto++ 8.0
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class CRYPTOPP_NO_VTABLE CHAM64 : public CHAM64_Info, public BlockCipherDocumentation
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{
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public:
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/// \brief CHAM 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<CHAM64_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<word16> m_rk;
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mutable FixedSizeSecBlock<word16, 4> m_x;
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unsigned int m_kw;
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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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};
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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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};
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/// \brief CHAM64 encryption
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typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
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/// \brief CHAM64 decryption
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typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
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};
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/// \brief CHAM64 encryption
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typedef CHAM64::Encryption CHAM64Encryption;
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/// \brief CHAM64 decryption
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typedef CHAM64::Decryption CHAM64Decryption;
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/// \brief CHAM 128-bit block cipher
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/// \details CHAM128 provides 128-bit block size. The valid key size is 128-bit and 256-bit.
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/// \note Crypto++ provides a byte oriented implementation
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/// \sa CHAM64, <a href="http://www.cryptopp.com/wiki/CHAM">CHAM</a>,
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/// <a href="https://pdfs.semanticscholar.org/2f57/61b5c2614cffd58a09cc83c375a2b32a2ed3.pdf">
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/// CHAM: A Family of Lightweight Block Ciphers for Resource-Constrained Devices</a>
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/// \since Crypto++ 8.0
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class CRYPTOPP_NO_VTABLE CHAM128 : public CHAM128_Info, public BlockCipherDocumentation
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{
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public:
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/// \brief CHAM 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<CHAM128_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_rk;
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mutable FixedSizeSecBlock<word32, 4> m_x;
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unsigned int m_kw;
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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_CHAM128_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_CHAM128_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 CHAM128 encryption
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typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
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/// \brief CHAM128 decryption
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typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
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};
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/// \brief CHAM128 encryption
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typedef CHAM128::Encryption CHAM128Encryption;
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/// \brief CHAM128 decryption
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typedef CHAM128::Decryption CHAM128Decryption;
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NAMESPACE_END
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#endif // CRYPTOPP_CHAM_H
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