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thirdparty/raknet/Source/DataBlockEncryptor.h

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+/// \file
+/// \brief \b [Internal] Encrypts and decrypts data blocks.  Used as part of secure connections.
+///
+/// This file is part of RakNet Copyright 2003 Kevin Jenkins.
+///
+/// Usage of RakNet is subject to the appropriate license agreement.
+/// Creative Commons Licensees are subject to the
+/// license found at
+/// http://creativecommons.org/licenses/by-nc/2.5/
+/// Single application licensees are subject to the license found at
+/// http://www.jenkinssoftware.com/SingleApplicationLicense.html
+/// Custom license users are subject to the terms therein.
+/// GPL license users are subject to the GNU General Public
+/// License as published by the Free
+/// Software Foundation; either version 2 of the License, or (at your
+/// option) any later version.
+
+#ifndef __DATA_BLOCK_ENCRYPTOR_H
+#define __DATA_BLOCK_ENCRYPTOR_H
+
+#include "Rijndael.h"
+#include "RakMemoryOverride.h"
+
+/// Encrypts and decrypts data blocks.
+class DataBlockEncryptor : public RakNet::RakMemoryOverride
+{
+
+public:
+	
+	/// Constructor
+	DataBlockEncryptor();
+	
+	/// Destructor
+	~DataBlockEncryptor();
+	
+	/// \return true if SetKey has been called previously 
+	bool IsKeySet( void ) const;
+	
+	/// Set the encryption key 
+	/// \param[in] key The new encryption key 
+	void SetKey( const unsigned char key[ 16 ] );
+	
+	/// Unset the encryption key 
+	void UnsetKey( void );
+	
+	/// Encryption adds 6 data bytes and then pads the number of bytes to be a multiple of 16.  Output should be large enough to hold this.
+	/// Output can be the same memory block as input
+	/// \param[in] input the input buffer to encrypt 
+	/// \param[in] inputLength the size of the @em input buffer 
+	/// \param[in] output the output buffer to store encrypted data 
+	/// \param[in] outputLength the size of the output buffer 
+	void Encrypt( unsigned char *input, unsigned int inputLength, unsigned char *output, unsigned int *outputLength );
+	
+	/// Decryption removes bytes, as few as 6.  Output should be large enough to hold this.
+	/// Output can be the same memory block as input
+	/// \param[in] input the input buffer to decrypt 
+	/// \param[in] inputLength the size of the @em input buffer 
+	/// \param[in] output the output buffer to store decrypted data 
+	/// \param[in] outputLength the size of the @em output buffer 
+	/// \return False on bad checksum or input, true on success
+	bool Decrypt( unsigned char *input, unsigned int inputLength, unsigned char *output, unsigned int *outputLength );
+	
+protected:
+	
+ 	keyInstance keyEncrypt;
+	keyInstance keyDecrypt;
+	cipherInstance cipherInst;
+	bool keySet;
+};
+
+#endif