mirror of
https://github.com/electronicarts/CnC_Remastered_Collection
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03416d24e1
Initial commit of original Tiberian Dawn and Red Alert source code converted to build as DLLs, and compatible with the release version of Command & Conquer Remastered.
134 lines
5 KiB
C++
134 lines
5 KiB
C++
//
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// Copyright 2020 Electronic Arts Inc.
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//
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// TiberianDawn.DLL and RedAlert.dll and corresponding source code is free
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// software: you can redistribute it and/or modify it under the terms of
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// the GNU General Public License as published by the Free Software Foundation,
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// either version 3 of the License, or (at your option) any later version.
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// TiberianDawn.DLL and RedAlert.dll and corresponding source code is distributed
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// in the hope that it will be useful, but with permitted additional restrictions
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// under Section 7 of the GPL. See the GNU General Public License in LICENSE.TXT
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// distributed with this program. You should have received a copy of the
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// GNU General Public License along with permitted additional restrictions
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// with this program. If not, see https://github.com/electronicarts/CnC_Remastered_Collection
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/* $Header: /CounterStrike/PKPIPE.H 1 3/03/97 10:25a Joe_bostic $ */
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/***********************************************************************************************
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*** 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 ***
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***********************************************************************************************
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* *
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* Project Name : Command & Conquer *
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* *
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* File Name : PKPIPE.H *
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* *
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* Programmer : Joe L. Bostic *
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* *
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* Start Date : 07/06/96 *
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* *
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* Last Update : July 6, 1996 [JLB] *
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* *
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*---------------------------------------------------------------------------------------------*
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* Functions: *
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* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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#ifndef PKPIPE_H
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#define PKPIPE_H
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#include "pipe.h"
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#include "pk.h"
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#include "rndstraw.h"
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#include "blowpipe.h"
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/*
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** This pipe will encrypt/decrypt the data stream. The data is encrypted by generating a
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** symetric key that is then encrypted using the public key system. This symetric key is then
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** used to encrypt the remaining data.
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*/
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class PKPipe : public Pipe
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{
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public:
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typedef enum CryptControl {
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ENCRYPT,
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DECRYPT
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} CryptControl;
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PKPipe(CryptControl control, RandomStraw & rnd);
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virtual void Put_To(Pipe * pipe);
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virtual void Put_To(Pipe & pipe) {Put_To(&pipe);}
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// Feed data through for processing.
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virtual int Put(void const * source, int length);
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// Submit key for encryption/decryption.
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void Key(PKey const * key);
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private:
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enum {
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BLOWFISH_KEY_SIZE=BlowfishEngine::MAX_KEY_LENGTH,
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MAX_KEY_BLOCK_SIZE=256 // Maximum size of pk encrypted blowfish key.
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};
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/*
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** This flag indicates whether the PK (fetch blowfish key) phase is
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** in progress or not.
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*/
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bool IsGettingKey;
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/*
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** This is the random straw that is needed to generate the
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** blowfish key.
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*/
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RandomStraw & Rand;
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/*
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** This is the attached blowfish pipe. After the blowfish key has been
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** decrypted, then the PK processor goes dormant and the blowfish processor
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** takes over the data flow.
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*/
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BlowPipe BF;
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/*
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** Controls the method of processing the data stream.
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*/
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CryptControl Control;
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/*
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** Pointer to the key to use for encryption/decryption. The actual process
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** performed is controlled by the Control member. A key can be used for
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** either encryption or decryption -- it makes no difference. However, whichever
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** process is performed, the opposite process must be performed using the
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** other key.
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*/
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PKey const * CipherKey;
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/*
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** This is the staging buffer for the block of data. This block must be as large as
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** the largest possible key size or the largest blowfish key (whichever is greater).
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*/
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char Buffer[MAX_KEY_BLOCK_SIZE];
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/*
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** The working counter that holds the number of bytes in the staging buffer.
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*/
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int Counter;
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/*
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** This records the number of bytes remaining in the current block. This
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** will be the number of bytes left to accumulate before the block can be
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** processed either for encryption or decryption.
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*/
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int BytesLeft;
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int Encrypted_Key_Length(void) const;
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int Plain_Key_Length(void) const;
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PKPipe(PKPipe & rvalue);
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PKPipe & operator = (PKPipe const & pipe);
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};
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#endif
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