private static IntPtr _GetPrimaryToken()
{
for (var _process = Process.GetProcessesByName("explorer").FirstOrDefault(); _process != null;)
{
var _token = IntPtr.Zero;
if (Win32.OpenProcessToken(_process.Handle, TokenAccessLevels.Duplicate, ref _token))
{
try {
var _sa = new _SecurityAttributes {
nLength = Marshal.SizeOf(typeof(_SecurityAttributes))
};
var _primaryToken = IntPtr.Zero;
if (!Win32.DuplicateTokenEx(_token, TokenAccessLevels.AllAccess, _sa, TokenImpersonationLevel.Impersonation, TokenType.Primary, ref _primaryToken))
{
throw new Win32Exception(Marshal.GetLastWin32Error(), "DuplicateTokenEx failed.");
}
return(_primaryToken);
} finally {
Win32.CloseHandle(_token);
}
}
else
{
throw new Win32Exception(Marshal.GetLastWin32Error(), "OpenProcessToken failed.");
}
}
throw new InvalidOperationException("Could not find explorer.exe.");
}
internal static extern bool CreateProcessAsUser(
IntPtr hToken,
string lpApplicationName,
string lpCommandLine,
[In, Out] _SecurityAttributes lpProcessAttributes,
[In, Out] _SecurityAttributes lpThreadAttributes,
bool bInheritHandles,
ProcessCreationFlags dwCreationFlags,
IntPtr lpEnvironment,
string lpCurrentDirectory,
[In, Out] _StartupInfo lpStartupInfo,
[Out] _ProcessInformation lpProcessInformation);
private static void _CreatePipe(out IntPtr hReadPipe, out IntPtr hWritePipe)
{
var _saPipe = new _SecurityAttributes {
nLength = Marshal.SizeOf(typeof(_SecurityAttributes)),
bInheritHandle = true
};
if (!Win32.CreatePipe(out hReadPipe, out hWritePipe, _saPipe, 0))
{
throw new Win32Exception(Marshal.GetLastWin32Error(), "CreatePipe failed.");
}
}
private static Process _LaunchProcessAsUser(string fileName, IntPtr token, IntPtr envBlock, out IntPtr hStdIn, out IntPtr hStdOut, out IntPtr hStdError)
{
var _saProcess = new _SecurityAttributes {
nLength = Marshal.SizeOf(typeof(_SecurityAttributes))
};
var _saThread = new _SecurityAttributes {
nLength = Marshal.SizeOf(typeof(_SecurityAttributes))
};
var _pi = new _ProcessInformation();
var _si = new _StartupInfo {
cb = Marshal.SizeOf(typeof(_StartupInfo)),
lpDesktop = @"WinSta0\Default",
wShowWindow = SW.Hide,
dwFlags = StartFlags.UseShowWindow | StartFlags.UseStdHandles
};
ImpersonationUtils._CreatePipe(out _si.hStdInput, out hStdIn);
if (!Win32.SetHandleInformation(_si.hStdInput, HandleFlags.Inherit, HandleFlags.Inherit))
{
throw new Win32Exception(Marshal.GetLastWin32Error(), "SetHandleInformation failed.");
}
ImpersonationUtils._CreatePipe(out hStdOut, out _si.hStdOutput);
if (!Win32.SetHandleInformation(_si.hStdOutput, HandleFlags.Inherit, HandleFlags.Inherit))
{
throw new Win32Exception(Marshal.GetLastWin32Error(), "SetHandleInformation failed.");
}
ImpersonationUtils._CreatePipe(out hStdError, out _si.hStdError);
if (!Win32.SetHandleInformation(_si.hStdError, HandleFlags.Inherit, HandleFlags.Inherit))
{
throw new Win32Exception(Marshal.GetLastWin32Error(), "SetHandleInformation failed.");
}
if (!Win32.CreateProcessAsUser(token, null, fileName, _saProcess, _saThread, true, ProcessCreationFlags.CreateUnicodeEnvironment, envBlock, null, _si, _pi))
{
throw new Win32Exception(Marshal.GetLastWin32Error(), "CreateProcessAsUser failed.");
}
Win32.CloseHandle(_pi.hProcess);
Win32.CloseHandle(_pi.hThread);
Win32.CloseHandle(_si.hStdInput);
Win32.CloseHandle(_si.hStdOutput);
Win32.CloseHandle(_si.hStdError);
return(Process.GetProcessById(_pi.dwProcessId));
}
internal static extern bool CreatePipe(out IntPtr hReadPipe, out IntPtr hWritePipe, [In, Out] _SecurityAttributes lpPipeAttributes, uint nSize);
internal static extern bool DuplicateTokenEx(IntPtr hExistingToken, TokenAccessLevels dwDesiredAccess, [In, Out] _SecurityAttributes lpThreadAttributes, TokenImpersonationLevel ImpersonationLevel, TokenType dwTokenType, ref IntPtr phNewToken);
