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202 lines
7.6 KiB
202 lines
7.6 KiB
![]()
4 years ago
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// threefish.h - written and placed in the public domain by Jeffrey Walton
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// Based on public domain code by Keru Kuro. Kuro's code is
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// available at http://cppcrypto.sourceforge.net/.
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/// \file Threefish.h
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/// \brief Classes for the Threefish block cipher
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/// \since Crypto++ 6.0
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#ifndef CRYPTOPP_THREEFISH_H
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#define CRYPTOPP_THREEFISH_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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#include "argnames.h"
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#include "stdcpp.h"
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NAMESPACE_BEGIN(CryptoPP)
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/// \brief Threefish block cipher information
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/// \tparam BS block size of the cipher, in bytes
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/// \since Crypto++ 6.0
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template <unsigned int BS>
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struct Threefish_Info : public FixedBlockSize<BS>, FixedKeyLength<BS>
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{
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static const std::string StaticAlgorithmName()
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{
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// Format is Cipher-Blocksize(Keylength)
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return "Threefish-" + IntToString(BS*8) + "(" + IntToString(BS*8) + ")";
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}
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};
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/// \brief Threefish block cipher base class
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/// \tparam BS block size of the cipher, in bytes
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/// \details User code should use Threefish256, Threefish512, Threefish1024
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/// \sa Threefish256, Threefish512, Threefish1024, <a href="http://www.cryptopp.com/wiki/Threefish">Threefish</a>
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/// \since Crypto++ 6.0
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template <unsigned int BS>
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struct CRYPTOPP_NO_VTABLE Threefish_Base
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{
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virtual ~Threefish_Base() {}
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void SetTweak(const NameValuePairs ¶ms)
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{
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m_tweak.New(3);
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ConstByteArrayParameter t;
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if (params.GetValue(Name::Tweak(), t))
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{
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// Tweak size is fixed at 16 for Threefish
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CRYPTOPP_ASSERT(t.size() == 16);
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GetUserKey(LITTLE_ENDIAN_ORDER, m_tweak.begin(), 2, t.begin(), 16);
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m_tweak[2] = m_tweak[0] ^ m_tweak[1];
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}
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else
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{
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std::memset(m_tweak.begin(), 0x00, 24);
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}
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}
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typedef SecBlock<word64, AllocatorWithCleanup<word64, true> > AlignedSecBlock64;
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mutable AlignedSecBlock64 m_wspace; // workspace
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AlignedSecBlock64 m_rkey; // keys
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AlignedSecBlock64 m_tweak;
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};
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/// \brief Threefish 256-bit block cipher
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/// \details Threefish256 provides 256-bit block size. The valid key size is 256-bit.
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/// \note Crypto++ provides a byte oriented implementation
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/// \sa Threefish512, Threefish1024, <a href="http://www.cryptopp.com/wiki/Threefish">Threefish</a>
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/// \since Crypto++ 6.0
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class CRYPTOPP_NO_VTABLE Threefish256 : public Threefish_Info<32>, public BlockCipherDocumentation
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{
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public:
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/// \brief Threefish block cipher transformation functions
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/// \details Provides implementation common to encryption and decryption
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/// \since Crypto++ 6.0
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class CRYPTOPP_NO_VTABLE Base : public Threefish_Base<32>, public BlockCipherImpl<Threefish_Info<32> >
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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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};
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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++ 6.0
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class CRYPTOPP_NO_VTABLE Enc : public Base
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{
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protected:
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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++ 6.0
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class CRYPTOPP_NO_VTABLE Dec : public Base
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{
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protected:
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void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
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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 Threefish256::Encryption Threefish256Encryption;
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typedef Threefish256::Decryption Threefish256Decryption;
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/// \brief Threefish 512-bit block cipher
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/// \details Threefish512 provides 512-bit block size. The valid key size is 512-bit.
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/// \note Crypto++ provides a byte oriented implementation
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/// \sa Threefish256, Threefish1024, <a href="http://www.cryptopp.com/wiki/Threefish">Threefish</a>
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/// \since Crypto++ 6.0
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class CRYPTOPP_NO_VTABLE Threefish512 : public Threefish_Info<64>, public BlockCipherDocumentation
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{
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public:
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/// \brief Threefish block cipher transformation functions
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/// \details Provides implementation common to encryption and decryption
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/// \since Crypto++ 6.0
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class CRYPTOPP_NO_VTABLE Base : public Threefish_Base<64>, public BlockCipherImpl<Threefish_Info<64> >
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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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};
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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++ 6.0
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class CRYPTOPP_NO_VTABLE Enc : public Base
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{
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protected:
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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++ 6.0
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class CRYPTOPP_NO_VTABLE Dec : public Base
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{
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protected:
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void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
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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 Threefish512::Encryption Threefish512Encryption;
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typedef Threefish512::Decryption Threefish512Decryption;
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/// \brief Threefish 1024-bit block cipher
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/// \details Threefish1024 provides 1024-bit block size. The valid key size is 1024-bit.
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/// \note Crypto++ provides a byte oriented implementation
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/// \sa Threefish256, Threefish512, <a href="http://www.cryptopp.com/wiki/Threefish">Threefish</a>
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/// \since Crypto++ 6.0
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class CRYPTOPP_NO_VTABLE Threefish1024 : public Threefish_Info<128>, public BlockCipherDocumentation
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{
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public:
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/// \brief Threefish block cipher transformation functions
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/// \details Provides implementation common to encryption and decryption
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/// \since Crypto++ 6.0
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class CRYPTOPP_NO_VTABLE Base : public Threefish_Base<128>, public BlockCipherImpl<Threefish_Info<128> >
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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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};
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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++ 6.0
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class CRYPTOPP_NO_VTABLE Enc : public Base
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{
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protected:
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void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
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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++ 6.0
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class CRYPTOPP_NO_VTABLE Dec : public Base
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{
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protected:
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void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
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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 Threefish1024::Encryption Threefish1024Encryption;
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typedef Threefish1024::Decryption Threefish1024Decryption;
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NAMESPACE_END
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#endif // CRYPTOPP_THREEFISH_H
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