ASP.NET Command Line Issue

Question

I want to execute some ms dos commands from our asp.net code (command line arguments). But the system does not allow this (Windows 2008 server). Any help would be great. The same code works fine on our Windows 2003 server. See the code I'm using below.

protected void btn_Click(object sender, EventArgs e) { ProcessStartInfo processStartInfo = new ProcessStartInfo("cmd.exe"); processStartInfo.RedirectStandardInput = true; processStartInfo.RedirectStandardOutput = true; processStartInfo.UseShellExecute = false; Process process = Process.Start(processStartInfo); if (process != null) { process.StandardInput.WriteLine("dir"); process.StandardInput.WriteLine("md test123"); } } 

Answer 1

Try using impersonation to execute this code. Here is the class I created for instance-based impersonation:

 /// <summary> /// Leverages the Windows API (advapi32.dll) to programmatically impersonate a user. /// </summary> public class ImpersonationContext : IDisposable { #region constants private const int LOGON32_LOGON_INTERACTIVE = 2; private const int LOGON32_PROVIDER_DEFAULT = 0; #endregion #region global variables private WindowsImpersonationContext impersonationContext; private bool impersonating; #endregion #region unmanaged code [DllImport("advapi32.dll")] private static extern int LogonUserA(String lpszUserName, String lpszDomain, String lpszPassword, int dwLogonType, int dwLogonProvider, ref IntPtr phToken); [DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)] private static extern int DuplicateToken(IntPtr hToken, int impersonationLevel, ref IntPtr hNewToken); [DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)] private static extern bool RevertToSelf(); [DllImport("kernel32.dll", CharSet = CharSet.Auto)] private static extern bool CloseHandle(IntPtr handle); #endregion #region constructors public ImpersonationContext() { impersonating = false; } /// <summary> /// Overloaded constructor and begins impersonating. /// </summary> public ImpersonationContext(string userName, string password, string domain) { this.BeginImpersonationContext(userName, password, domain); } #endregion #region impersonation methods /// <summary> /// Begins the impersonation context for the specified user. /// </summary> /// <remarks>Don't call this method if you used the overloaded constructor.</remarks> public void BeginImpersonationContext(string userName, string password, string domain) { //initialize token and duplicate variables IntPtr token = IntPtr.Zero; IntPtr tokenDuplicate = IntPtr.Zero; if (RevertToSelf()) { if (LogonUserA(userName, domain, password, LOGON32_LOGON_INTERACTIVE, LOGON32_PROVIDER_DEFAULT, ref token) != 0) { if (DuplicateToken(token, 2, ref tokenDuplicate) != 0) { using (WindowsIdentity tempWindowsIdentity = new WindowsIdentity(tokenDuplicate)) { //begin the impersonation context and mark impersonating true impersonationContext = tempWindowsIdentity.Impersonate(); impersonating = true; } } } } //close the handle to the account token if (token != IntPtr.Zero) CloseHandle(token); //close the handle to the duplicated account token if (tokenDuplicate != IntPtr.Zero) CloseHandle(tokenDuplicate); } /// <summary> /// Ends the current impersonation context. /// </summary> public void EndImpersonationContext() { //if the context exists undo it and dispose of the object if (impersonationContext != null) { //end the impersonation context and dispose of the object impersonationContext.Undo(); impersonationContext.Dispose(); } //mark the impersonation flag false impersonating = false; } #endregion #region properties /// <summary> /// Gets a value indicating whether the impersonation is currently active. /// </summary> public bool Impersonating { get { return impersonating; } } #endregion #region IDisposable implementation ~ImpersonationContext() { Dispose(false); } public void Dispose() { Dispose(true); } protected virtual void Dispose(bool disposing) { if (disposing) { if (impersonationContext != null) { impersonationContext.Undo(); impersonationContext.Dispose(); } } } #endregion } 

Here is an example of how to implement it:

 using (ImpersonationContext context = new ImpersonationContext("user", "password", "domain")) { if (context.Impersonating) { ProcessStartInfo processStartInfo = new ProcessStartInfo("cmd.exe"); processStartInfo.RedirectStandardInput = true; processStartInfo.RedirectStandardOutput = true; processStartInfo.UseShellExecute = false; Process process = Process.Start(processStartInfo); if (process != null) { process.StandardInput.WriteLine("dir"); process.StandardInput.WriteLine("md test123"); } } }