engine.cpp.svn-base
上传用户:market2
上传日期:2018-11-18
资源大小:18786k
文件大小:3k
- /*
- * OpenKore - Padded Packet Emulator.
- * Copyright (c) 2007 kLabMouse, Japplegame, and many other contributors
- *
- * This program 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 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- * See http://www.gnu.org/licenses/gpl.html for the full license.
- */
- #include <memory.h>
- #include <stdlib.h>
- #include "engine.h"
- #include "block.h"
- #include "Algorithms/algorithms.h"
- namespace OpenKore {
- namespace PaddedPackets {
-
- Engine::Engine()
- {
- serverMapSync = 0;
- clientSync = 0;
- memset( pktBuffer, 0, PPENGINE_BUFSIZE * sizeof(byte) );
- }
- Engine::~Engine()
- {
- }
- void
- Engine::addKey(dword data)
- {
- inputKeys.add( data );
- }
- void
- Engine::setSync(dword sync)
- {
- clientSync = sync;
- }
- void
- Engine::setMapSync(dword mapSync)
- {
- serverMapSync = mapSync;
- }
- void
- Engine::setAccId(dword accId)
- {
- clientAccId = accId;
- }
- void
- Engine::setPacket(byte *packet, dword len)
- {
- memcpy( pktBuffer, packet, len);
- }
- unsigned int
- Engine::encode(byte *dest, word type)
- {
- dword offsets[] = { 15, 14, 12, 9, 5, 0 };
- dword hashData = createHash(serverMapSync, clientSync, clientAccId, type);
- unsigned int packetLength = 0;
- int iterations = 5;
- // pad_2
- for (int iter = 0; iter <= iterations; iter++) {
- packetLength = (1 + inputKeys.getSize()) * 4;
- dword intCtr = 5;
- byte *writePtr = pktBuffer + 4;
- for( unsigned int pass = 0; pass < inputKeys.getSize(); pass++ ) {
- dword magic = ((intCtr * (dword)pass) + (hashData - offsets[iter])) % 0x27;
- packetLength += magic;
- intCtr += 3;
- writePtr += (4 + magic);
- *((dword*)writePtr - 1) = inputKeys[pass] + iter - 5;
- }
- }
- pktBuffer[2] = (byte)packetLength;
- *(word*)pktBuffer = (word)type;
- // Reset input keys for next generation
- inputKeys.reset();
- memcpy(dest, pktBuffer, packetLength);
- return packetLength;
- }
- void
- Engine::decode(byte *src, unsigned int keys)
- {
- // Reset output keys
- outputKeys.reset();
- dword hashData = createHash(serverMapSync, clientSync, clientAccId, *(word*)src);
- dword intCtr = 5;
- byte *readPtr = src + 4;
- for( unsigned int pass = 0; pass < keys; pass++ ) {
- dword magic = ((intCtr * (dword)pass) + hashData) % 0x27;
- intCtr += 3;
- readPtr += (4 + magic);
- outputKeys.add( *((dword*)readPtr - 1) );
- }
- }
- dword Engine::getKey(unsigned int index) const
- {
- return outputKeys[index];
- }
- } // PaddedPackets
- } // OpenKore