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Utils.cpp
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Utils.cpp
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#include "Utils.h"
#include <iostream>
#include <TlHelp32.h>
namespace Utils {
HANDLE CreateAccessTokenFromPID(DWORD dwProcessId)
{
HANDLE hDupToken = INVALID_HANDLE_VALUE;
HANDLE hProc = OpenProcess(MAXIMUM_ALLOWED, FALSE, dwProcessId);
if (hProc)
{
HANDLE hToken = INVALID_HANDLE_VALUE;
if (OpenProcessToken(hProc, TOKEN_DUPLICATE, &hToken))
{
SECURITY_ATTRIBUTES attrs = {
sizeof(SECURITY_ATTRIBUTES),
NULL,
FALSE,
};
if (!DuplicateTokenEx(hToken, TOKEN_ALL_ACCESS, &attrs, SecurityImpersonation, TokenImpersonation, &hDupToken))
{
std::cout << "DuplicateTokenEx: " << std::system_category().message(GetLastError()) << std::endl;
hDupToken = INVALID_HANDLE_VALUE;
}
}
else {
std::cout << "OpenProcessToken: " << std::system_category().message(GetLastError()) << std::endl;
}
CloseHandle(hToken);
CloseHandle(hProc);
}
else {
std::cout << "OpenProcess: " << std::system_category().message(GetLastError()) << std::endl;
}
return hDupToken;
}
DWORD GetPIDFromProcessName(LPCWSTR lpProcessName)
{
PROCESSENTRY32 pe32 = {};
DWORD pid = 0;
HANDLE hSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, NULL);
if (hSnap != INVALID_HANDLE_VALUE)
{
pe32.dwSize = sizeof(PROCESSENTRY32);
if (Process32First(hSnap, &pe32))
{
do
{
if (!_wcsicmp(lpProcessName, pe32.szExeFile))
{
pid = pe32.th32ProcessID;
break;
}
} while (Process32Next(hSnap, &pe32));
}
CloseHandle(hSnap);
}
else {
std::cout << "CreateToolhelp32Snapshot: " << std::system_category().message(GetLastError()) << std::endl;
}
return pid;
}
BOOL ImpersonateAsSystem()
{
BOOL success = FALSE;
DWORD dwPID = GetPIDFromProcessName(L"winlogon.exe");
if (dwPID != 0)
{
HANDLE hToken = CreateAccessTokenFromPID(dwPID);
if (hToken != INVALID_HANDLE_VALUE)
{
success = ImpersonateLoggedOnUser(hToken);
if (!success) {
std::cout << "ImpersonateLoggedOnUser: " << std::system_category().message(GetLastError()) << std::endl;
}
CloseHandle(hToken);
}
}
else {
std::cout << "Impersonation Helper Process could not be found!" << std::endl;
}
return success;
}
DWORD StartTIServiceAndGetPID()
{
const DWORD SLEEP_INTERVAL = 100;
DWORD dwLoopCount = 50; //50 * 100ms = 5s
DWORD dwPID = 0;
SC_HANDLE hSCM = OpenSCManager(NULL, NULL, SC_MANAGER_CONNECT);
if (hSCM)
{
SC_HANDLE hService = OpenService(hSCM, L"TrustedInstaller", SERVICE_START | SERVICE_QUERY_STATUS);
if (hService)
{
SERVICE_STATUS_PROCESS ssp = {};
DWORD dwBytesNeeded;
do
{
if (QueryServiceStatusEx(hService, SC_STATUS_PROCESS_INFO, (LPBYTE)&ssp, sizeof(SERVICE_STATUS_PROCESS), &dwBytesNeeded))
{
if (ssp.dwCurrentState == SERVICE_RUNNING)
{
dwPID = ssp.dwProcessId;
break;
}
else if (ssp.dwCurrentState == SERVICE_STOPPED)
{
if (!StartService(hService, 0, NULL))
{
std::cout << "StartService: " << std::system_category().message(GetLastError()) << std::endl;
break;
}
}
}
else {
std::cout << "QueryServiceStatusEx: " << std::system_category().message(GetLastError()) << std::endl;
}
Sleep(SLEEP_INTERVAL);
} while (--dwLoopCount > 0);
CloseServiceHandle(hService);
}
else {
std::cout << "OpenService: " << std::system_category().message(GetLastError()) << std::endl;
}
CloseServiceHandle(hSCM);
}
else {
std::cout << "OpenSCManager: " << std::system_category().message(GetLastError()) << std::endl;
}
return dwPID;
}
}