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-rw-r--r--CryptoPP/seal.h44
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diff --git a/CryptoPP/seal.h b/CryptoPP/seal.h
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+#ifndef CRYPTOPP_SEAL_H
+#define CRYPTOPP_SEAL_H
+
+#include "strciphr.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+//! _
+template <class B = BigEndian>
+struct SEAL_Info : public FixedKeyLength<20, SimpleKeyingInterface::INTERNALLY_GENERATED_IV, 4>
+{
+ static const char *StaticAlgorithmName() {return B::ToEnum() == LITTLE_ENDIAN_ORDER ? "SEAL-3.0-LE" : "SEAL-3.0-BE";}
+};
+
+template <class B = BigEndian>
+class CRYPTOPP_NO_VTABLE SEAL_Policy : public AdditiveCipherConcretePolicy<word32, 256>, public SEAL_Info<B>
+{
+protected:
+ void CipherSetKey(const NameValuePairs &params, const byte *key, size_t length);
+ void OperateKeystream(KeystreamOperation operation, byte *output, const byte *input, size_t iterationCount);
+ void CipherResynchronize(byte *keystreamBuffer, const byte *IV, size_t length);
+ bool CipherIsRandomAccess() const {return true;}
+ void SeekToIteration(lword iterationCount);
+
+private:
+ FixedSizeSecBlock<word32, 512> m_T;
+ FixedSizeSecBlock<word32, 256> m_S;
+ SecBlock<word32> m_R;
+
+ word32 m_startCount, m_iterationsPerCount;
+ word32 m_outsideCounter, m_insideCounter;
+};
+
+//! <a href="http://www.weidai.com/scan-mirror/cs.html#SEAL-3.0-BE">SEAL</a>
+template <class B = BigEndian>
+struct SEAL : public SEAL_Info<B>, public SymmetricCipherDocumentation
+{
+ typedef SymmetricCipherFinal<ConcretePolicyHolder<SEAL_Policy<B>, AdditiveCipherTemplate<> >, SEAL_Info<B> > Encryption;
+ typedef Encryption Decryption;
+};
+
+NAMESPACE_END
+
+#endif