//------------------------------------------------------------------------------ // // Copyright (c) Microsoft Corporation. All rights reserved. // //------------------------------------------------------------------------------ /* * 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; /// /// [To be supplied.] /// public sealed class RoleManagerModule : IHttpModule { private const int MAX_COOKIE_LENGTH = 4096; private RoleManagerEventHandler _eventHandler; /// /// /// Initializes a new instance of the /// class. /// /// [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; } } /// /// [To be supplied.] /// public void Dispose() { } /// /// [To be supplied.] /// 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); } } //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// /// /// [To be supplied.] /// 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); } } } //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// } }