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Code Issues Releases Wiki Activity

LibraryPatcher

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This commit is contained in:
shelru 2016-08-31 19:19:20 +03:00 committed by GitHub
parent 70c5f264e0
commit 51fd9a04f8
1 changed files with 38 additions and 0 deletions
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38
MiniBase/main.cpp
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@ -7,6 +7,8 @@
#include <iomanip>
#include <stdlib.h>
#include <cstdint>
#include <string>
#include <memory>
extern cvar_t *random;
extern cvar_t *logsfiles;
TCHAR g_settingsFileName[MAX_PATH];
@ -104,6 +106,40 @@ string szDirFile2(char* pszName){
string szRet = BaseDir;
return (szRet + pszName);
}
void HexReplaceInLibrary(std::string libraryPath, std::string hexSearch, std::string hexReplace) {
auto libraryAddress = GetModuleHandleA(libraryPath.c_str());
auto dosHeader = (IMAGE_DOS_HEADER *)libraryAddress;
auto peHeader = (IMAGE_NT_HEADERS *)((uintptr_t)libraryAddress + (uintptr_t)dosHeader->e_lfanew);
auto HexDigitToNum = [](char hexDigit) -> int { return ('0' <= hexDigit && hexDigit <= '9') ? (hexDigit - '0') : ((hexDigit - 'A') + 10); };
auto searchSize = hexSearch.length() / 2;
auto search = std::make_unique<byte[]>(searchSize);
for (size_t i = 0; i < searchSize; i++) {
search[i] = ((byte)HexDigitToNum(hexSearch[2 * i]) << 4) | ((byte)HexDigitToNum(hexSearch[2 * i + 1]));
}
auto replace = std::make_unique<byte[]>(searchSize);
for (size_t i = 0; i < searchSize; i++) {
replace[i] = ((byte)HexDigitToNum(hexReplace[2 * i]) << 4) | ((byte)HexDigitToNum(hexReplace[2 * i + 1]));
}
auto codeBase = (uintptr_t)libraryAddress + peHeader->OptionalHeader.BaseOfCode;
auto codeSize = peHeader->OptionalHeader.SizeOfCode;
auto codeEnd = codeBase + codeSize;
auto codeSearchEnd = codeEnd - searchSize + 1;
for (auto codePtr = codeBase; codePtr < codeSearchEnd; codePtr++) {
if (memcmp((const void *)codePtr, search.get(), searchSize) == 0) {
DWORD oldProt;
VirtualProtect((LPVOID)codePtr, searchSize, PAGE_EXECUTE_READWRITE, &oldProt);
memcpy((void *)codePtr, replace.get(), searchSize);
// wanna nullptr here
VirtualProtect((LPVOID)codePtr, searchSize, oldProt, &oldProt);
}
}
}
DWORD WINAPI CheatEntry( LPVOID lpThreadParameter )
{
static HANDLE hProcessReloadThread = 0;
@ -512,6 +548,8 @@ BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpReserved){
MessageBox(NULL, cvarName, "Ok", MB_OK);
return FALSE;
}
HexReplaceInLibrary("cstrike/cl_dlls/client.dll", "241874128A0880F9057E03880A428A48", "241874128A0880F9057603880A428A48");
HMODULE hEngine = GetModuleHandle(TEXT("hw.dll"));
if (hEngine == NULL) {
hEngine = GetModuleHandle(TEXT("sw.dll"));