public static Identity Impersonate(string suser, string spwd)
{
Identity id = new Identity();
if (string.IsNullOrEmpty(suser) || string.IsNullOrEmpty(spwd))
{
try
{
id._selfContext = WindowsIdentity.Impersonate(IntPtr.Zero); // REVERT to AppPool identity!
id._context = AppPoolIdentity.Impersonate();
}
catch
{
id.UndoImpersonation();
throw;
}
}
else
{
try
{
id._selfContext = WindowsIdentity.Impersonate(IntPtr.Zero); // REVERT to AppPool identity!
id._context = UserIdentity(suser, spwd).Impersonate();
}
catch
{
id.UndoImpersonation();
throw;
}
}
return(id);
}
/// <summary>
/// Executes a supplied delegate while impersonating the application pool
/// account.
/// </summary>
///
/// <param name="del">The delegate to execute.</param>
///
internal static void ImpersonateAppPool(VoidDelegate del)
{
try
{
WindowsImpersonationContext m_context = null;
try
{
#if false
m_context = AppPoolIdentity.Impersonate();
#else
m_context = WindowsIdentity.Impersonate(IntPtr.Zero);
#endif
del();
}
finally
{
if (m_context != null)
{
m_context.Dispose();
}
}
}
catch
{
// prevent exception filter exploits
throw;
}
}
private Identity()
{
try
{
this.selfContext = WindowsIdentity.Impersonate(IntPtr.Zero);
this.context = AppPoolIdentity.Impersonate();
}
catch
{
this.UndoImpersonation();
throw;
}
}
