[C++] WriteMemory Funktion

[Acubra]

Hey,
da ich grade an einer Trainerbase in C++ arbeite, habe ich mir gedacht das ich ja die wichtigsten Funktionen hier veröffentlichen kann.
Vllt. mach ich dann auch die komplette Base publik.

Nun zur Funktion (die Kommentare sollten alles erklären):

C Code

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////////////////////////////////////////////////////////////////////////// //WriteMemory //This function will write specific code at a specific memory location. It will need the process and module name of the target, //Furthermore you need to pass the offset relative to your base address to the function. //Function will return 1 if everything went correctly. If not it will show you an error and return 0. ////////////////////////////////////////////////////////////////////////// int WriteMemory(LPCWSTR szProcessName, LPCWSTR szModuleName, DWORD dwOffset, BYTE szOrigCode[], int nOrigCode, BYTE szModCode[], int nModCode) { HANDLE hProcess; //Process handle. DWORD BaseAddress, lpAddress, dwOldProtect; //BaseAddress of the module and the real address we want to know. char* BytesRead[255]; //Buffer hProcess = GetProcessHandle(szProcessName); //Get the process handle for WPM/RPM. if (hProcess == 0) { MessageBox(NULL, _T("Couldn't get process handle!"), szErrorTitle, NULL); return 0; } BaseAddress = GetModuleBaseAddress(szProcessName, szModuleName); //Get the base address of the specific module. if (BaseAddress == 0) { MessageBox(NULL, _T("Couldn't get module base address!"), szErrorTitle, NULL); return 0; } lpAddress = (DWORD)BaseAddress + dwOffset; //Calculate real address. //Read code and compare it. If it's szOrigCode, then we need to write our Code. If it's szModCode, then we need to write the original code //If it's neither one of these two, then the user has probably a wrong version. //First VirtualProtectEx to make the code read/writeable. if (VirtualProtectEx(hProcess, (LPVOID)lpAddress, nOrigCode, PAGE_EXECUTE_READWRITE, &dwOldProtect) == 0) { MessageBox(NULL, _T("VirtualProtectEx failed!"), szErrorTitle, NULL); return 0; } //Now ReadProcessMemory and the byte comparism. if(ReadProcessMemory(hProcess, (LPVOID)lpAddress, (LPVOID)BytesRead, nOrigCode, 0) == 0) { MessageBox(NULL, _T("ReadProcessMemory failed!"), szErrorTitle, NULL); return 0; } //Compare original bytes with those standing in memory. if(memcmp((const void*)BytesRead, szOrigCode, nOrigCode) == 0) //Bytes match. { //We got the original bytes standing in memory, so we activate the cheat now. if ((WriteProcessMemory(hProcess, (LPVOID)lpAddress, (LPCVOID)szModCode, nModCode, 0)) == 0) { //Oh noes, WPM error. MessageBox(NULL, _T("Failed to write to process memory.."), szErrorTitle, NULL); return 0; } else //Everything went fine. { Beep(0x1000,200); //Activated sound. return 1; } } else if (memcmp((const void*)BytesRead, szModCode, nModCode) == 0) { //We got the modified bytes standing in memory. So the user wants to deactivate the option now. Therefore we need to write //the original bytes. if ((WriteProcessMemory(hProcess, (LPVOID)lpAddress, (LPCVOID)szOrigCode, nOrigCode, 0)) == 0) { //Oh noes, WPM error. MessageBox(NULL, _T("Failed to write to process memory.."), szErrorTitle, NULL); return 0; } else //Everything went fine. { Beep(0x500,200); //Deactivated sound. return 1; } } else { //Neither modified bytes nor original bytes found. So the user has a wrong/currupted version. MessageBox(NULL, _T("You have the wrong gameversion!"), szErrorTitle, NULL); return 0; } return 0; }

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