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//
// System.Web.Security.RoleManagerModule
//
// Authors:
// Ben Maurer (bmaurer@users.sourceforge.net)
//
// (C) 2003 Ben Maurer
//
//
// 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.Collections;
using System.Collections.Specialized;
using System.Security.Principal;
using System.Text;
using System.Threading;
using System.Web.Configuration;
namespace System.Web.Security {
public sealed class RoleManagerModule : IHttpModule
{
static readonly object getRolesEvent = new object ();
RoleManagerSection _config = null;
EventHandlerList events = new EventHandlerList ();
public event RoleManagerEventHandler GetRoles {
add { events.AddHandler (getRolesEvent, value); }
remove { events.RemoveHandler (getRolesEvent, value); }
}
public void Dispose ()
{
}
void ClearCookie (HttpApplication app, string cookieName)
{
HttpCookie clearCookie = new HttpCookie (_config.CookieName, "");
clearCookie.Path = _config.CookiePath;
clearCookie.Expires = DateTime.MinValue;
clearCookie.Domain = _config.Domain;
clearCookie.Secure = _config.CookieRequireSSL;
app.Response.SetCookie (clearCookie);
}
void OnPostAuthenticateRequest (object sender, EventArgs args)
{
HttpApplication app = (HttpApplication)sender;
/* if we're disabled, bail out early */
if (_config == null || !_config.Enabled)
return;
/* allow the user to populate the Role */
RoleManagerEventHandler eh = events [getRolesEvent] as RoleManagerEventHandler;
if (eh != null) {
RoleManagerEventArgs role_args = new RoleManagerEventArgs (app.Context);
eh (this, role_args);
if (role_args.RolesPopulated)
return;
}
RolePrincipal principal;
HttpCookie cookie = app.Request.Cookies [_config.CookieName];
IIdentity currentIdentity = app.Context.User.Identity;
if (app.Request.IsAuthenticated) {
if (cookie != null) {
if (!_config.CacheRolesInCookie)
cookie = null;
else if (_config.CookieRequireSSL && !app.Request.IsSecureConnection) {
cookie = null;
ClearCookie (app, _config.CookieName);
}
}
if (cookie == null || String.IsNullOrEmpty (cookie.Value))
principal = new RolePrincipal (currentIdentity);
else
principal = new RolePrincipal (currentIdentity, cookie.Value);
}
else {
/* anonymous request */
if (cookie != null) {
ClearCookie (app, _config.CookieName);
}
principal = new RolePrincipal (currentIdentity);
}
app.Context.User = principal;
Thread.CurrentPrincipal = principal;
}
void OnEndRequest (object sender, EventArgs args)
{
HttpApplication app = (HttpApplication)sender;
/* if we're not enabled or configured to cache
* cookies, bail out */
if (_config == null || !_config.Enabled || !_config.CacheRolesInCookie)
return;
/* if the user isn't authenticated, bail
* out */
if (!app.Request.IsAuthenticated)
return;
/* if the configuration requires ssl for
* cookies and we're not on an ssl connection,
* bail out */
if (_config.CookieRequireSSL && !app.Request.IsSecureConnection)
return;
RolePrincipal principal = app.Context.User as RolePrincipal;
if (principal == null) /* just for my sanity */
return;
if (!principal.CachedListChanged)
return;
string ticket = principal.ToEncryptedTicket ();
if (ticket == null || ticket.Length > 4096) {
ClearCookie (app, _config.CookieName);
return;
}
HttpCookie cookie = new HttpCookie (_config.CookieName, ticket);
cookie.HttpOnly = true;
if (!string.IsNullOrEmpty (_config.Domain))
cookie.Domain = _config.Domain;
if (_config.CookieRequireSSL)
cookie.Secure = true;
if (_config.CookiePath.Length > 1) // more than '/'
cookie.Path = _config.CookiePath;
app.Response.SetCookie (cookie);
}
public void Init (HttpApplication app)
{
_config = (RoleManagerSection) WebConfigurationManager.GetSection ("system.web/roleManager");
app.PostAuthenticateRequest += OnPostAuthenticateRequest;
app.EndRequest += OnEndRequest;
}
}
}
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