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diff --git a/external/crypto++-5.6.3/blowfish.h b/external/crypto++-5.6.3/blowfish.h
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+++ b/external/crypto++-5.6.3/blowfish.h
@@ -0,0 +1,56 @@
+// blowfish.h - written and placed in the public domain by Wei Dai
+
+//! \file blowfish.h
+//! \brief Classes for the Blowfish block cipher
+
+#ifndef CRYPTOPP_BLOWFISH_H
+#define CRYPTOPP_BLOWFISH_H
+
+#include "seckey.h"
+#include "secblock.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+//! \class Blowfish_Info
+//! \brief The cipher's key, iv, block size and name information.
+struct Blowfish_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 4, 56>, public FixedRounds<16>
+{
+	static const char *StaticAlgorithmName() {return "Blowfish";}
+};
+
+// <a href="http://www.weidai.com/scan-mirror/cs.html#Blowfish">Blowfish</a>
+
+//! \class Blowfish
+//! \brief Provides Blowfish encryption and decryption
+class Blowfish : public Blowfish_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<Blowfish_Info>
+	{
+	public:
+		void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
+		void UncheckedSetKey(const byte *key_string, unsigned int keylength, const NameValuePairs &params);
+
+	private:
+		void crypt_block(const word32 in[2], word32 out[2]) const;
+
+		static const word32 p_init[ROUNDS+2];
+		static const word32 s_init[4*256];
+
+		FixedSizeSecBlock<word32, ROUNDS+2> pbox;
+		FixedSizeSecBlock<word32, 4*256> sbox;
+	};
+
+public:
+	typedef BlockCipherFinal<ENCRYPTION, Base> Encryption;
+	typedef BlockCipherFinal<DECRYPTION, Base> Decryption;
+};
+
+typedef Blowfish::Encryption BlowfishEncryption;
+typedef Blowfish::Decryption BlowfishDecryption;
+
+NAMESPACE_END
+
+#endif