Windows implements User Switching

Using System;
Using System.Collections.Generic;
Using System.Text;
Using System.IO;
Using System.Security.Principal;
Using System.Security.AccessControl;
Using System.Runtime.InteropServices;
Using System.Security.Permissions;

Namespace Changeuser
{
Class Program
{
[DllImport ("advapi32.dll", SetLastError = True)]

private static extern bool LogonUser (String lpszUserName, String lpszdomain, String lpszpassword, int dwlogontype, int DwL Ogonprovider, ref IntPtr phtoken);

[DllImport ("kernel32.dll", CharSet = CharSet.Auto)]
private extern static bool CloseHandle (INTPTR handle);

Get token after Login
private static IntPtr Tokenhandle = new IntPtr (0);

private static WindowsImpersonationContext Impersonateduser;

[PermissionSetAttribute (SecurityAction.Demand, Name = "FullTrust")]

private static bool Impersonate (string domainName, String userName, string password)
{

Try
{

const int logon32_provider_default = 0;

const int logon32_logon_interactive = 2;

Tokenhandle = IntPtr.Zero;

BOOL returnvalue = LogonUser (userName, domainName, password, logon32_logon_interactive, Logon32_provider_default, ref Tokenhandle);

if (!returnvalue)
{

int ret = Marshal.GetLastWin32Error ();

Console.WriteLine ("LogonUser call failed with error code:" + ret);

throw new System.ComponentModel.Win32Exception (ret);

}

WindowsIdentity newId = new WindowsIdentity (tokenhandle);

Impersonateduser = Newid.impersonate ();

return true;

}

catch (Exception ex)
{

Console.WriteLine ("Exception occurred." + ex. Message);

return false;

}

}

<summary>
Implements user context switching.
</summary>
private static void Undo ()
{

Try
{
WindowsIdentity currentidentity = WindowsIdentity.GetCurrent ();
Console.WriteLine ("First:" +currentidentity.user.tostring ());
Enable User Switching
Impersonateduser.undo ();
Currentidentity = WindowsIdentity.GetCurrent ();
Console.WriteLine ("Second:" + currentIdentity.User.ToString ());
Free the Tokens.

if (tokenhandle! = IntPtr.Zero)

CloseHandle (Tokenhandle);


}
catch (System.Exception ex)
{
Console.WriteLine ("Undo except:" + ex.) Message);
}

}

public static void Addfilesecurity (string fileName, String account,

Filesystemrights rights, AccessControlType ControlType)
{

Get a FileSecurity object that represents the

Current security settings.

FileSecurity fsecurity = File.getaccesscontrol (fileName);

Add the FileSystemAccessRule to the security settings.

Fsecurity.addaccessrule (New FileSystemAccessRule (account,

Rights, ControlType));

Set the new access settings.

File.setaccesscontrol (FileName, fsecurity);

}

static void Main (string[] args)
{
Try
{
if (args. Length < 3)
{
Console.WriteLine ("Info:");
Console.WriteLine ("EXE username password file:use username password zai path xia create index111.asp");
Return
}

String strusername = Args[0];
String strpass = Args[1];
String strfile = Args[2];
String strdomain = ".";

if (strusername.indexof ("\ \")! =-1)
{
Strdomain = strusername.split (' \ \ ') [0];
strUserName = strusername.split (' \ \ ') [1];
}
Impersonate (Strdomain, strUserName, Strpass);

if (file.exists (strfile))
{
Join access Control
Addfilesecurity (strfile, strUserName, Filesystemrights.fullcontrol, Accesscontroltype.allow);
Setting file properties
System.IO.File.SetAttributes (strfile, System.IO.FileAttributes.Normal);
File.delete (strfile);

Console.WriteLine ("Delete is ok\n");
}

Undo ();


}
catch (System.Exception ex)
{
Console.WriteLine ("Main except:" + ex.) Message);
}
Http://www.gutefreunde.ch/content/files/documents/en_admin.aspx

}
}
}

Windows implements User Switching