CnC_Remastered_Collection/REDALERT/BLWSTRAW.H

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//
// Copyright 2020 Electronic Arts Inc.
//
// TiberianDawn.DLL and RedAlert.dll and corresponding source code is free
// software: you can redistribute it and/or modify it under the terms of
// the GNU General Public License as published by the Free Software Foundation,
// either version 3 of the License, or (at your option) any later version.
// TiberianDawn.DLL and RedAlert.dll and corresponding source code is distributed
// in the hope that it will be useful, but with permitted additional restrictions
// under Section 7 of the GPL. See the GNU General Public License in LICENSE.TXT
// distributed with this program. You should have received a copy of the
// GNU General Public License along with permitted additional restrictions
// with this program. If not, see https://github.com/electronicarts/CnC_Remastered_Collection
/* $Header: /CounterStrike/BLWSTRAW.H 1 3/03/97 10:24a Joe_bostic $ */
/***********************************************************************************************
*** C O N F I D E N T I A L --- W E S T W O O D S T U D I O S ***
***********************************************************************************************
* *
* Project Name : Command & Conquer *
* *
* File Name : BLWSTRAW.H *
* *
* Programmer : Joe L. Bostic *
* *
* Start Date : 07/02/96 *
* *
* Last Update : July 2, 1996 [JLB] *
* *
*---------------------------------------------------------------------------------------------*
* Functions: *
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
#ifndef BLWSTRAW_H
#define BLWSTRAW_H
#include "straw.h"
#include "blowfish.h"
/*
** Performs Blowfish encryption/decryption to the data that is drawn through this straw. The
** process is controlled by the key which must be submitted to the class before any data
** manipulation will occur. The Blowfish algorithm is symmetric, thus the same key is used
** for encryption as is for decryption.
*/
class BlowStraw : public Straw
{
public:
typedef enum CryptControl {
ENCRYPT,
DECRYPT
} CryptControl;
BlowStraw(CryptControl control) : BF(NULL), Counter(0), Control(control) {}
virtual ~BlowStraw(void) {delete BF;BF = NULL;}
virtual int Get(void * source, int slen);
// Submit key for blowfish engine.
void Key(void const * key, int length);
protected:
/*
** The Blowfish engine used for encryption/decryption. If this pointer is
** NULL, then this indicates that the blowfish engine is not active and no
** key has been submitted. All data would pass through this straw unchanged
** in that case.
*/
BlowfishEngine * BF;
private:
char Buffer[8];
int Counter;
CryptControl Control;
BlowStraw(BlowStraw & rvalue);
BlowStraw & operator = (BlowStraw const & straw);
};
#endif