97 lines
3.8 KiB
C
97 lines
3.8 KiB
C
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/*
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** Command & Conquer Renegade(tm)
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** Copyright 2025 Electronic Arts Inc.
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**
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** This program is free software: you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation, either version 3 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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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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Project Name: Generic Game Results Server
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File Name : wencrypt.h
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Author : Joe Howes
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Start Date : Jul 9, 1999
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Last Update :
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------------------------------------------------------------------------------
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A simple encryption system for game results packets. Specifically designed
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to work only with unsigned char buffers of least 15 bytes long.
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\****************************************************************************/
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#ifndef __WENCRYPT_H__
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#define __WENCRYPT_H__
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/*------------------------------------------------------------------------------.
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| BUILD TYPE |
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| In the interest of smaller code and distributing as little of our |
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| encryption system as possible with game CDs, this preprocessor directive |
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| should be uncommented when building a client. When uncommented, only those |
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| functions relevant to encrypting will be compiled, and those relevant only |
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| to decrypting will not. |
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`------------------------------------------------------------------------------*/
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#define __CLIENT__
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/*------------------------------------------------------------------------------.
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| PROTOTYPES |
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`------------------------------------------------------------------------------*/
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#ifndef __CLIENT__
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unsigned char* DecryptPacket(unsigned char* encbuf, int* size);
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#endif
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// These are for munching the data
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unsigned char* PrepareEncryptedPacket(unsigned char* packet, int* size);
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void RLEncode(unsigned char* src, unsigned char* dst, int* size);
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float ran3(long* idnum);
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void GenerateKey(unsigned char* key, int len, long seed);
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unsigned char* SimpleEncrypt(const unsigned char* src, int* len);
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#ifndef __CLIENT__
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unsigned char* RLDecode(unsigned char* src, int* size);
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unsigned char* SimpleDecrypt(unsigned char* buf, int* len);
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#endif
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/*------------------------------------------------------------------------------.
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| MACROS |
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`------------------------------------------------------------------------------*/
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// For key generation
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#define MBIG 1000000000
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#define MSEED 161803398
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#define MZ 0
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#define FAC (1.0/MBIG)
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// Errors
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#define ERR_SPURIOUS_ESCAPE -1 // A single escape was found at the end of a compressed
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// buffer. Should never happen as escapes in the
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// stream are stuffed and should otherwise indicate
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// the start of a token.
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#define ERR_BUFFER_TOO_SMALL -2 // The buffer being passed to Simple Encrypt is
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// smaller than 15 bytes, which is too small to work
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// with it's seed-stuffing. A gameres packet should
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// never be as small as 15 bytes anyway.
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#define ERR_BAD_SEED -3 // The seed value being passed is zero. Not a valid
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// seed.
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#endif
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