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112 lines
4.8 KiB
112 lines
4.8 KiB
// rabbit.h - written and placed in the public domain by Jeffrey Walton |
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// based on public domain code by Martin Boesgaard, Mette Vesterager, |
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// Thomas Pedersen, Jesper Christiansen and Ove Scavenius. |
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// |
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// The reference materials and source files are available at |
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// The eSTREAM Project, http://www.ecrypt.eu.org/stream/e2-rabbit.html. |
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/// \file rabbit.h |
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/// \brief Classes for Rabbit stream cipher |
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/// \sa <A HREF="http://www.ecrypt.eu.org/stream/e2-rabbit.html">The |
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/// eSTREAM Project | Rabbit</A> and |
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/// <A HREF="https://www.cryptopp.com/wiki/Rabbit">Crypto++ Wiki | Rabbit</A>. |
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/// \since Crypto++ 8.0 |
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#ifndef CRYPTOPP_RABBIT_H |
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#define CRYPTOPP_RABBIT_H |
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#include "strciphr.h" |
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#include "secblock.h" |
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// The library does not have a way to describe an optional IV. Rabbit takes |
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// an optional IV so two classes are offered to bridge the gap. One provides |
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// Rabbit without an IV and the second provides Rabbit with an IV. |
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NAMESPACE_BEGIN(CryptoPP) |
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/// \brief Rabbit stream cipher information |
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/// \since Crypto++ 8.0 |
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struct RabbitInfo : public FixedKeyLength<16, SimpleKeyingInterface::NOT_RESYNCHRONIZABLE> |
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{ |
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CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() { return "Rabbit"; } |
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}; |
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/// \brief Rabbit stream cipher information |
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/// \since Crypto++ 8.0 |
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struct RabbitWithIVInfo : public FixedKeyLength<16, SimpleKeyingInterface::UNIQUE_IV, 8> |
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{ |
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CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() { return "RabbitWithIV"; } |
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}; |
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/// \brief Rabbit stream cipher implementation |
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/// \since Crypto++ 8.0 |
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class RabbitPolicy : public AdditiveCipherConcretePolicy<word32, 4>, public RabbitInfo |
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{ |
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protected: |
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void CipherSetKey(const NameValuePairs ¶ms, const byte *key, size_t length); |
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void OperateKeystream(KeystreamOperation operation, byte *output, const byte *input, size_t iterationCount); |
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bool CanOperateKeystream() const { return true; } |
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bool CipherIsRandomAccess() const { return false; } |
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private: |
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// Master and working states |
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FixedSizeSecBlock<word32, 8> m_mx, m_mc, m_wx, m_wc; |
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// Workspace |
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FixedSizeSecBlock<word32, 12> m_t; |
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word32 m_mcy, m_wcy; // carry |
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}; |
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/// \brief Rabbit stream cipher implementation |
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/// \since Crypto++ 8.0 |
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class RabbitWithIVPolicy : public AdditiveCipherConcretePolicy<word32, 4>, public RabbitWithIVInfo |
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{ |
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protected: |
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void CipherSetKey(const NameValuePairs ¶ms, const byte *key, size_t length); |
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void OperateKeystream(KeystreamOperation operation, byte *output, const byte *input, size_t iterationCount); |
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void CipherResynchronize(byte *keystreamBuffer, const byte *iv, size_t length); |
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bool CanOperateKeystream() const { return true; } |
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bool CipherIsRandomAccess() const { return false; } |
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private: |
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// Master and working states |
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FixedSizeSecBlock<word32, 8> m_mx, m_mc, m_wx, m_wc; |
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// Workspace |
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FixedSizeSecBlock<word32, 12> m_t; |
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word32 m_mcy, m_wcy; // carry |
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}; |
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/// \brief Rabbit stream cipher |
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/// \details Rabbit is a stream cipher developed by Martin Boesgaard, Mette Vesterager, |
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/// Thomas Pedersen, Jesper Christiansen and Ove Scavenius. Rabbit is one of the final four |
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/// Profile 1 (software) ciphers selected for the eSTREAM portfolio. |
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/// \details Crypto++ provides Rabbit and RabbitWithIV classes. Two classes are necessary |
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/// because the library lacks the means to describe and manage optional IVs. |
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/// \sa RabbitWithIV, <A HREF="http://www.ecrypt.eu.org/stream/e2-rabbit.html">The |
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/// eSTREAM Project | Rabbit</A> and |
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/// <A HREF="https://www.cryptopp.com/wiki/Rabbit">Crypto++ Wiki | Rabbit</A>. |
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/// \since Crypto++ 8.0 |
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struct Rabbit : public RabbitInfo, public SymmetricCipherDocumentation |
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{ |
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typedef SymmetricCipherFinal<ConcretePolicyHolder<RabbitPolicy, AdditiveCipherTemplate<> >, RabbitInfo> Encryption; |
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typedef Encryption Decryption; |
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}; |
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/// \brief Rabbit stream cipher |
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/// \details Rabbit is a stream cipher developed by Martin Boesgaard, Mette Vesterager, |
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/// Thomas Pedersen, Jesper Christiansen and Ove Scavenius. Rabbit is one of the final four |
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/// Profile 1 (software) ciphers selected for the eSTREAM portfolio. |
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/// \details Crypto++ provides Rabbit and RabbitWithIV classes. Two classes are necessary |
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/// because the library lacks the means to describe and manage optional IVs. |
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/// \sa Rabbit, <A HREF="http://www.ecrypt.eu.org/stream/e2-rabbit.html">The |
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/// eSTREAM Project | Rabbit</A> and |
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/// <A HREF="https://www.cryptopp.com/wiki/Rabbit">Crypto++ Wiki | Rabbit</A>. |
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/// \since Crypto++ 8.0 |
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struct RabbitWithIV : public RabbitWithIVInfo, public SymmetricCipherDocumentation |
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{ |
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typedef SymmetricCipherFinal<ConcretePolicyHolder<RabbitWithIVPolicy, AdditiveCipherTemplate<> >, RabbitWithIVInfo> Encryption; |
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typedef Encryption Decryption; |
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}; |
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NAMESPACE_END |
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#endif // CRYPTOPP_RABBIT_H
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