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//
// System.Web.Security.DefaultAuthenticationModule
//
// Authors:
// Gonzalo Paniagua Javier (gonzalo@ximian.com)
//
// (C) 2002 Ximian, Inc (http://www.ximian.com)
// Copyright (C) 2005 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System.ComponentModel;
using System.Security.Permissions;
using System.Security.Principal;
using System.Threading;
// more info on the workings of this class can be found in Shackow, p. 55
//
namespace System.Web.Security
{
// CAS - no InheritanceDemand here as the class is sealed
[AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
public sealed class DefaultAuthenticationModule : IHttpModule
{
static readonly object authenticateEvent = new object ();
static IPrincipal generic_principal = new GenericPrincipal (new GenericIdentity ("", ""), new string [0]);
EventHandlerList events = new EventHandlerList ();
public event DefaultAuthenticationEventHandler Authenticate {
add { events.AddHandler (authenticateEvent, value); }
remove { events.RemoveHandler (authenticateEvent, value); }
}
[SecurityPermission (SecurityAction.Demand, UnmanagedCode = true)]
public DefaultAuthenticationModule ()
{
}
public void Dispose ()
{
}
public void Init (HttpApplication app)
{
app.DefaultAuthentication += new EventHandler (OnDefaultAuthentication);
}
void OnDefaultAuthentication (object sender, EventArgs args)
{
HttpApplication app = (HttpApplication) sender;
HttpContext context = app.Context;
DefaultAuthenticationEventHandler eh = events [authenticateEvent] as DefaultAuthenticationEventHandler;
if (context.User == null && eh != null)
eh (this, new DefaultAuthenticationEventArgs (context));
if (context.User == null)
context.User = generic_principal;
Thread.CurrentPrincipal = context.User;
}
}
}
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