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//------------------------------------------------------------------------------
// <copyright file="RoleManagerModule.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
/*
* RoleManagerModule class
*
* Copyright (c) 1999 Microsoft Corporation
*/
namespace System.Web.Security {
using System.Collections;
using System.Security.Principal;
using System.Security.Permissions;
using System.Text;
using System.Threading;
using System.Web;
using System.Web.Configuration;
using System.Web.Caching;
using System.Web.Util;
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public sealed class RoleManagerModule : IHttpModule {
private const int MAX_COOKIE_LENGTH = 4096;
private RoleManagerEventHandler _eventHandler;
/// <devdoc>
/// <para>
/// Initializes a new instance of the <see cref='System.Web.Security.RoleManagerModule'/>
/// class.
/// </para>
/// </devdoc>
[SecurityPermission(SecurityAction.Demand, Unrestricted=true)]
public RoleManagerModule() {
}
public event RoleManagerEventHandler GetRoles {
add {
HttpRuntime.CheckAspNetHostingPermission(AspNetHostingPermissionLevel.Low, SR.Feature_not_supported_at_this_level);
_eventHandler += value;
}
remove {
_eventHandler -= value;
}
}
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public void Dispose() {
}
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public void Init(HttpApplication app) {
// for IIS 7, skip wireup of these delegates altogether unless the
// feature is enabled for this application
// this avoids the initial OnEnter transition unless it's needed
if (Roles.Enabled) {
app.PostAuthenticateRequest += new EventHandler(this.OnEnter);
app.EndRequest += new EventHandler(this.OnLeave);
}
}
////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
private void OnEnter(Object source, EventArgs eventArgs) {
if (!Roles.Enabled) {
if (HttpRuntime.UseIntegratedPipeline) {
((HttpApplication)source).Context.DisableNotifications(RequestNotification.EndRequest, 0);
}
return;
}
HttpApplication app = (HttpApplication)source;
HttpContext context = app.Context;
if (_eventHandler != null) {
RoleManagerEventArgs e = new RoleManagerEventArgs(context);
_eventHandler(this, e);
if (e.RolesPopulated)
return;
}
Debug.Assert(null != context.User, "null != context.User");
if (Roles.CacheRolesInCookie)
{
if (context.User.Identity.IsAuthenticated && (!Roles.CookieRequireSSL || context.Request.IsSecureConnection))
{
// Try to create from cookie
try
{
HttpCookie cookie = context.Request.Cookies[Roles.CookieName];
if (cookie != null)
{
string cookieValue = cookie.Value;
// Ignore cookies that are too long
if (cookieValue != null && cookieValue.Length > MAX_COOKIE_LENGTH) {
Roles.DeleteCookie();
}
else {
if (!String.IsNullOrEmpty(Roles.CookiePath) && Roles.CookiePath != "/") {
cookie.Path = Roles.CookiePath;
}
cookie.Domain = Roles.Domain;
context.SetPrincipalNoDemand(CreateRolePrincipalWithAssert(context.User.Identity, cookieValue));
}
}
}
catch { } // ---- exceptions
}
else
{
if (context.Request.Cookies[Roles.CookieName] != null)
Roles.DeleteCookie();
// if we're not using cookie caching, we don't need the EndRequest
// event and can suppress it
if (HttpRuntime.UseIntegratedPipeline) {
context.DisableNotifications(RequestNotification.EndRequest, 0);
}
}
}
if (!(context.User is RolePrincipal))
context.SetPrincipalNoDemand(CreateRolePrincipalWithAssert(context.User.Identity));
HttpApplication.SetCurrentPrincipalWithAssert(context.User);
}
[SecurityPermission(SecurityAction.Assert, ControlPrincipal = true)]
private RolePrincipal CreateRolePrincipalWithAssert(IIdentity identity, string encryptedTicket = null) {
if (encryptedTicket == null) {
return new RolePrincipal(identity);
}
else {
return new RolePrincipal(identity, encryptedTicket);
}
}
private void OnLeave(Object source, EventArgs eventArgs) {
HttpApplication app;
HttpContext context;
app = (HttpApplication)source;
context = app.Context;
if (!Roles.Enabled || !Roles.CacheRolesInCookie || context.Response.HeadersWritten)
return;
if (context.User == null || !(context.User is RolePrincipal) || !context.User.Identity.IsAuthenticated)
return;
if (Roles.CookieRequireSSL && !context.Request.IsSecureConnection)
{ // if cookie is sent, then clear it
if (context.Request.Cookies[Roles.CookieName] != null)
Roles.DeleteCookie();
return;
}
RolePrincipal rp = (RolePrincipal) context.User;
if (rp.CachedListChanged && context.Request.Browser.Cookies)
{
string s = rp.ToEncryptedTicket();
if (string.IsNullOrEmpty(s) || s.Length > MAX_COOKIE_LENGTH) {
Roles.DeleteCookie();
} else {
HttpCookie cookie = new HttpCookie(Roles.CookieName, s);
cookie.HttpOnly = true;
cookie.Path = Roles.CookiePath;
cookie.Domain = Roles.Domain;
if (Roles.CreatePersistentCookie)
cookie.Expires = rp.ExpireDate;
cookie.Secure = Roles.CookieRequireSSL;
context.Response.Cookies.Add(cookie);
}
}
}
////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////
}
}
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