mirror of
https://github.com/shadps4-emu/ext-cryptopp.git
synced 2024-11-27 11:50:29 +00:00
48 lines
1.5 KiB
C++
48 lines
1.5 KiB
C++
#ifndef CRYPTOPP_SEAL_H
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#define CRYPTOPP_SEAL_H
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#include "strciphr.h"
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NAMESPACE_BEGIN(CryptoPP)
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template <class B = BigEndian>
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struct SEAL_Info : public FixedKeyLength<20, SimpleKeyingInterface::INTERNALLY_GENERATED_IV>
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{
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static const char *StaticAlgorithmName() {return B::ToEnum() == LITTLE_ENDIAN_ORDER ? "SEAL-3.0-LE" : "SEAL-3.0-BE";}
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};
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template <class B = BigEndian>
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class CRYPTOPP_NO_VTABLE SEAL_Policy : public AdditiveCipherConcretePolicy<word32, 256>, public SEAL_Info<B>
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{
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public:
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unsigned int IVSize() const {return 4;}
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void GetNextIV(byte *IV) const {UnalignedPutWord(BIG_ENDIAN_ORDER, IV, m_outsideCounter+1);}
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protected:
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void CipherSetKey(const NameValuePairs ¶ms, const byte *key, unsigned int length);
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void OperateKeystream(KeystreamOperation operation, byte *output, const byte *input, unsigned int iterationCount);
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void CipherResynchronize(byte *keystreamBuffer, const byte *IV);
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bool IsRandomAccess() const {return true;}
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void SeekToIteration(dword iterationCount);
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private:
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FixedSizeSecBlock<word32, 512> m_T;
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FixedSizeSecBlock<word32, 256> m_S;
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SecBlock<word32> m_R;
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word32 m_startCount, m_iterationsPerCount;
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word32 m_outsideCounter, m_insideCounter;
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};
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//! <a href="http://www.weidai.com/scan-mirror/cs.html#SEAL-3.0-BE">SEAL</a>
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template <class B = BigEndian>
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struct SEAL : public SEAL_Info<B>, public SymmetricCipherDocumentation
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{
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typedef SymmetricCipherFinal<ConcretePolicyHolder<SEAL_Policy<B>, AdditiveCipherTemplate<> >, SEAL_Info<B> > Encryption;
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typedef Encryption Decryption;
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};
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NAMESPACE_END
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#endif
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