using Microsoft.Win32; using System; using System.Diagnostics; using System.Runtime.InteropServices; using System.Security.Principal; namespace RobVanderWoude { class IsElevated { static int Main(string[] args) { if (args.Length == 0) { if (RobVanderWoude.UacHelper.IsProcessElevated) { return 0; } else { return 1; } } else { Console.WriteLine(); Console.WriteLine("IsElevated.exe, Version 1.00"); Console.WriteLine("Return true (0) if running in a process with elevated privileges"); Console.WriteLine(); Console.WriteLine("Usage: ISELEVATED.EXE"); Console.WriteLine(); Console.WriteLine("Based on a thread on stackoverflow.com:"); Console.WriteLine("/questions/1220213/c-detect-if-running-with-elevated-privileges"); Console.WriteLine(); Console.WriteLine("Written by Rob van der Woude"); Console.WriteLine("http://www.robvanderwoude.com"); return 2; } } } // Source of the following code: // http://stackoverflow.com/questions/1220213/c-detect-if-running-with-elevated-privileges public static class UacHelper { private const string uacRegistryKey = "Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\System"; private const string uacRegistryValue = "EnableLUA"; private static uint STANDARD_RIGHTS_READ = 0x00020000; private static uint TOKEN_QUERY = 0x0008; private static uint TOKEN_READ = (STANDARD_RIGHTS_READ | TOKEN_QUERY); [DllImport("advapi32.dll", SetLastError = true)] [return: MarshalAs(UnmanagedType.Bool)] static extern bool OpenProcessToken(IntPtr ProcessHandle, UInt32 DesiredAccess, out IntPtr TokenHandle); [DllImport("advapi32.dll", SetLastError = true)] public static extern bool GetTokenInformation(IntPtr TokenHandle, TOKEN_INFORMATION_CLASS TokenInformationClass, IntPtr TokenInformation, uint TokenInformationLength, out uint ReturnLength); public enum TOKEN_INFORMATION_CLASS { TokenUser = 1, TokenGroups, TokenPrivileges, TokenOwner, TokenPrimaryGroup, TokenDefaultDacl, TokenSource, TokenType, TokenImpersonationLevel, TokenStatistics, TokenRestrictedSids, TokenSessionId, TokenGroupsAndPrivileges, TokenSessionReference, TokenSandBoxInert, TokenAuditPolicy, TokenOrigin, TokenElevationType, TokenLinkedToken, TokenElevation, TokenHasRestrictions, TokenAccessInformation, TokenVirtualizationAllowed, TokenVirtualizationEnabled, TokenIntegrityLevel, TokenUIAccess, TokenMandatoryPolicy, TokenLogonSid, MaxTokenInfoClass } public enum TOKEN_ELEVATION_TYPE { TokenElevationTypeDefault = 1, TokenElevationTypeFull, TokenElevationTypeLimited } public static bool IsUacEnabled { get { RegistryKey uacKey = Registry.LocalMachine.OpenSubKey(uacRegistryKey, false); bool result = uacKey.GetValue(uacRegistryValue).Equals(1); return result; } } public static bool IsProcessElevated { get { if (IsUacEnabled) { IntPtr tokenHandle; //if (!OpenProcessToken(Process.GetCurrentProcess().Handle, TOKEN_READ, out tokenHandle)) if (!OpenProcessToken(Process.GetCurrentProcess().Handle, TOKEN_READ, out tokenHandle)) { throw new ApplicationException("Could not get process token. Win32 Error Code: " + Marshal.GetLastWin32Error()); } TOKEN_ELEVATION_TYPE elevationResult = TOKEN_ELEVATION_TYPE.TokenElevationTypeDefault; int elevationResultSize = Marshal.SizeOf((int)elevationResult); uint returnedSize = 0; IntPtr elevationTypePtr = Marshal.AllocHGlobal(elevationResultSize); bool success = GetTokenInformation(tokenHandle, TOKEN_INFORMATION_CLASS.TokenElevationType, elevationTypePtr, (uint)elevationResultSize, out returnedSize); if (success) { elevationResult = (TOKEN_ELEVATION_TYPE)Marshal.ReadInt32(elevationTypePtr); bool isProcessAdmin = elevationResult == TOKEN_ELEVATION_TYPE.TokenElevationTypeFull; return isProcessAdmin; } else { throw new ApplicationException("Unable to determine the current elevation."); } } else { WindowsIdentity identity = WindowsIdentity.GetCurrent(); WindowsPrincipal principal = new WindowsPrincipal(identity); bool result = principal.IsInRole(WindowsBuiltInRole.Administrator); return result; } } } } }