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diff --git a/external/crypto++-5.6.3/3way.h b/external/crypto++-5.6.3/3way.h
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+++ b/external/crypto++-5.6.3/3way.h
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+// 3way.h - written and placed in the public domain by Wei Dai
+
+//! \file 3way.h
+//! \brief Classes for the 3-Way block cipher
+
+#ifndef CRYPTOPP_THREEWAY_H
+#define CRYPTOPP_THREEWAY_H
+
+#include "config.h"
+#include "seckey.h"
+#include "secblock.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+//! \class ThreeWay_Info
+//! \brief The cipher's key, iv, block size and name information.
+struct ThreeWay_Info : public FixedBlockSize<12>, public FixedKeyLength<12>, public VariableRounds<11>
+{
+	static const char *StaticAlgorithmName() {return "3-Way";}
+};
+
+// <a href="http://www.weidai.com/scan-mirror/cs.html#3-Way">3-Way</a>
+
+//! \class ThreeWay
+//! \brief Provides 3-Way encryption and decryption
+class ThreeWay : public ThreeWay_Info, public BlockCipherDocumentation
+{
+	//! \class Base
+	//! \brief Class specific implementation and overrides used to operate the cipher.
+	//! \details Implementations and overrides in \p Base apply to both \p ENCRYPTION and \p DECRYPTION directions
+	class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<ThreeWay_Info>
+	{
+	public:
+		void UncheckedSetKey(const byte *key, unsigned int length, const NameValuePairs &params);
+
+	protected:
+		unsigned int m_rounds;
+		FixedSizeSecBlock<word32, 3> m_k;
+	};
+
+	//! \class Enc
+	//! \brief Class specific methods used to operate the cipher in the forward direction.
+	//! \details Implementations and overrides in \p Enc apply to \p ENCRYPTION.
+	class CRYPTOPP_NO_VTABLE Enc : public Base
+	{
+	public:
+		void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
+	};
+
+	//! \class Dec
+	//! \brief Class specific methods used to operate the cipher in the reverse direction.
+	//! \details Implementations and overrides in \p Dec apply to \p DECRYPTION.
+	class CRYPTOPP_NO_VTABLE Dec : public Base
+	{
+	public:
+		void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
+	};
+
+public:
+	typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
+	typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
+};
+
+typedef ThreeWay::Encryption ThreeWayEncryption;
+typedef ThreeWay::Decryption ThreeWayDecryption;
+
+NAMESPACE_END
+
+#endif