DarkflameServer/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