First Commit

externals/cryptopp/hc128.h

@@ -0,0 +1,67 @@
+// hc128.h - written and placed in the public domain by Jeffrey Walton
+//           based on public domain code by Hongjun Wu.
+//
+//           The reference materials and source files are available at
+//           The eSTREAM Project, http://www.ecrypt.eu.org/stream/e2-hc128.html.
+
+/// \file hc128.h
+/// \brief Classes for HC-128 stream cipher
+/// \sa <A HREF="http://www.ecrypt.eu.org/stream/e2-hc128.html">The
+///   eSTREAM Project | HC-128</A> and
+///   <A HREF="https://www.cryptopp.com/wiki/HC-128">Crypto++ Wiki | HC-128</A>.
+/// \since Crypto++ 8.0
+
+#ifndef CRYPTOPP_HC128_H
+#define CRYPTOPP_HC128_H
+
+#include "strciphr.h"
+#include "secblock.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+/// \brief HC-128 stream cipher information
+/// \since Crypto++ 8.0
+struct HC128Info : public FixedKeyLength<16, SimpleKeyingInterface::UNIQUE_IV, 16>
+{
+	CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() { return "HC-128"; }
+};
+
+/// \brief HC-128 stream cipher implementation
+/// \since Crypto++ 8.0
+class HC128Policy : public AdditiveCipherConcretePolicy<word32, 16>, public HC128Info
+{
+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 CanOperateKeystream() const { return true; }
+	bool CipherIsRandomAccess() const { return false; }
+
+	void GenerateKeystream(word32* keystream);
+	void SetupUpdate();
+
+private:
+	FixedSizeSecBlock<word32, 16> m_X;
+	FixedSizeSecBlock<word32, 16> m_Y;
+	FixedSizeSecBlock<word32, 8> m_key;
+	FixedSizeSecBlock<word32, 8> m_iv;
+	word32 m_T[1024];
+	word32 m_ctr;
+};
+
+/// \brief HC-128 stream cipher
+/// \details HC-128 is a stream cipher developed by Hongjun Wu. HC-128 is one of the
+///   final four Profile 1 (software) ciphers selected for the eSTREAM portfolio.
+/// \sa <A HREF="http://www.ecrypt.eu.org/stream/e2-hc128.html">The
+///   eSTREAM Project | HC-128</A> and
+///   <A HREF="https://www.cryptopp.com/wiki/HC-128">Crypto++ Wiki | HC-128</A>.
+/// \since Crypto++ 8.0
+struct HC128 : public HC128Info, public SymmetricCipherDocumentation
+{
+	typedef SymmetricCipherFinal<ConcretePolicyHolder<HC128Policy, AdditiveCipherTemplate<> >, HC128Info> Encryption;
+	typedef Encryption Decryption;
+};
+
+NAMESPACE_END
+
+#endif  // CRYPTOPP_HC128_H