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<Type Name="WindowsImpersonationContext" FullName="System.Security.Principal.WindowsImpersonationContext">
<TypeSignature Maintainer="auto" Language="C#" Value="public class WindowsImpersonationContext : IDisposable" />
<AssemblyInfo>
<AssemblyName>mscorlib</AssemblyName>
<AssemblyPublicKey>[00 00 00 00 00 00 00 00 04 00 00 00 00 00 00 00]</AssemblyPublicKey>
<AssemblyVersion>1.0.5000.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ThreadSafetyStatement>Gtk# is thread aware, but not thread safe; See the <link location="node:gtk-sharp/programming/threads">Gtk# Thread Programming</link> for details.</ThreadSafetyStatement>
<Base>
<BaseTypeName>System.Object</BaseTypeName>
</Base>
<Interfaces>
<Interface>
<InterfaceName>System.IDisposable</InterfaceName>
</Interface>
</Interfaces>
<Docs>
<summary>This class holds the impersonation context and the possibility to revert to the original identity.</summary>
<remarks>The WindowsImpersonationContext class can also be used on POSIX compliant operating system.
<example><code lang="C#">
using System;
using System.IO;
using System.Security.Principal;
class WinId {
static string file = "root.txt";
static void Show (string msg)
{
Console.WriteLine (msg);
WindowsIdentity wi = WindowsIdentity.GetCurrent ();
Console.WriteLine ("\tUserName:\t{0}", wi.Name);
Console.WriteLine ("\tToken:\t\t{0}", wi.Token);
Console.WriteLine ();
}
static void Show (Exception e)
{
Console.WriteLine ("Oops something has gone bad...");
Console.WriteLine (e.ToString ());
}
static void DisplayFile (string filename)
{
Console.WriteLine ("Trying to read file {0}", filename);
try {
using (StreamReader sr = File.OpenText (filename)) {
Console.WriteLine (sr.ReadToEnd ());
sr.Close ();
}
}
catch (Exception e) {
Show (e);
}
}
static void DeleteFile (string filename)
{
Console.WriteLine ("Trying to delete file {0}", filename);
try {
File.Delete (filename);
}
catch (Exception e) {
Show (e);
}
}
[STAThread]
static void Main (string[] args)
{
bool fileCreated = false;
Show ("Current User");
bool posix = ((int)Environment.OSVersion.Platform == 128);
bool root = (WindowsIdentity.GetCurrent ().Token == IntPtr.Zero);
if (root && posix) {
Console.WriteLine ("Cool you're root!");
Console.WriteLine ("Let's create a file {0}.", file);
using (StreamWriter sw = new StreamWriter (file)) {
sw.WriteLine ("FOR ROOT EYES ONLY");
sw.Close ();
}
fileCreated = true;
DisplayFile (file);
Console.WriteLine ("Now, who do you want to be today ? ");
string username = Console.ReadLine ();
WindowsIdentity nonroot = new WindowsIdentity (username);
Console.WriteLine ("Trying to impersonate {0} (token: {1})",
nonroot.Name, nonroot.Token);
WindowsImpersonationContext wic = null;
try {
wic = nonroot.Impersonate ();
Show ("Impersonated User");
DisplayFile (file);
DeleteFile (file);
}
catch (Exception e) {
Show (e);
}
finally {
if (wic != null) {
wic.Undo ();
wic = null;
}
}
Show ("Back to original User");
if (File.Exists (file)) {
DisplayFile (file);
DeleteFile (file);
}
else if (fileCreated) {
Console.WriteLine ("Hey dude, where's my file ?");
}
}
else {
Console.WriteLine ("Sorry, not much fun to have with non-root users.");
}
}
} </code></example></remarks>
</Docs>
<Members>
<Member MemberName="Dispose">
<MemberSignature Language="C#" Value="public void Dispose ();" />
<MemberType>Method</MemberType>
<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters />
<Docs>
<summary>To be added.</summary>
<remarks>To be added.</remarks>
<since version=".NET 2.0" />
</Docs>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Attributes>
<Attribute>
<AttributeName>System.Runtime.InteropServices.ComVisible(false)</AttributeName>
</Attribute>
</Attributes>
</Member>
<Member MemberName="Dispose">
<MemberSignature Language="C#" Value="protected virtual void Dispose (bool disposing);" />
<MemberType>Method</MemberType>
<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="disposing" Type="System.Boolean" />
</Parameters>
<Docs>
<param name="disposing">To be added.</param>
<summary>To be added.</summary>
<remarks>To be added.</remarks>
<since version=".NET 2.0" />
</Docs>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Attributes>
<Attribute>
<AttributeName>System.Runtime.InteropServices.ComVisible(false)</AttributeName>
</Attribute>
</Attributes>
</Member>
<Member MemberName="Finalize">
<MemberSignature Language="C#" Value="~WindowsImpersonationContext ();" />
<MemberType>Method</MemberType>
<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters />
<Docs>
<summary>To be added.</summary>
<remarks>To be added.</remarks>
</Docs>
<AssemblyInfo>
<AssemblyVersion>1.0.5000.0</AssemblyVersion>
</AssemblyInfo>
</Member>
<Member MemberName="Undo">
<MemberSignature Language="C#" Value="public void Undo ();" />
<MemberType>Method</MemberType>
<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters />
<Docs>
<summary>Revert to the previous identity.</summary>
<remarks>To be added</remarks>
</Docs>
<AssemblyInfo>
<AssemblyVersion>1.0.5000.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
</Members>
<Attributes>
<Attribute>
<AttributeName>System.Runtime.InteropServices.ComVisible(true)</AttributeName>
</Attribute>
</Attributes>
</Type>
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