Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / Security / BackStopAuthenticationModule.cs / 4 / BackStopAuthenticationModule.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.Security { using System.Collections.Specialized; using System.Runtime.Serialization; using System.Security.Principal; using System.Security.Permissions; using System.Threading; using System.Web; ////// [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] public sealed class DefaultAuthenticationModule : IHttpModule { private DefaultAuthenticationEventHandler _eventHandler; ///[To be supplied.] ////// [SecurityPermission(SecurityAction.Demand, Unrestricted=true)] public DefaultAuthenticationModule() { } ////// Initializes a new instance of the ////// class. /// /// public event DefaultAuthenticationEventHandler Authenticate { add { // WOS 1709222: DefaultAuthentication_Authenticate is not supported in integrated mode. if (HttpRuntime.UseIntegratedPipeline) { throw new PlatformNotSupportedException(SR.GetString(SR.Method_Not_Supported_By_Iis_Integrated_Mode, "DefaultAuthentication.Authenticate")); } _eventHandler += value; } remove { _eventHandler -= value; } } ///[To be supplied.] ////// public void Dispose() { } ///[To be supplied.] ////// public void Init(HttpApplication app) { // adding this module back to IIS7 // it needs to run between Windows auth in PostAuthn // and RoleManager (or anyone else who needs the principal) // so ordering is important // If the subscribed event changes, WindowsAuthenticationModule // needs work, too. if (HttpRuntime.UseIntegratedPipeline) { app.PostAuthenticateRequest += new EventHandler(this.OnEnter); } else { app.DefaultAuthentication += new EventHandler(this.OnEnter); } } //////////////////////////////////////////////////////////// // OnAuthenticate: Custom Authentication modules can override // this method to create a custom IPrincipal object from // a DefaultIdentity void OnAuthenticate(DefaultAuthenticationEventArgs e) { //////////////////////////////////////////////////////////// // If there are event handlers, invoke the handlers if (_eventHandler != null) { _eventHandler(this, e); } } //////////////////////////////////////////////////////////// // AddOnAuthenticate and RemoveOnAuthenticate: Use these // methods to hook up event handlers to handle the // OnAuthenticate Event void OnEnter(Object source, EventArgs eventArgs) { HttpApplication app; HttpContext context; app = (HttpApplication)source; context = app.Context; //////////////////////////////////////////////////////////// // Step 1: Check if authentication failed if (context.Response.StatusCode > 200) { // Invalid credentials if (context.Response.StatusCode == 401) WriteErrorMessage(context); app.CompleteRequest(); return; } //////////////////////////////////////////////////////////// // Step 2: If no auth module has created an IPrincipal, then fire // OnAuthentication event if (context.User == null) { OnAuthenticate (new DefaultAuthenticationEventArgs(context) ); if (context.Response.StatusCode > 200) { // Invalid credentials if (context.Response.StatusCode == 401) WriteErrorMessage(context); app.CompleteRequest(); return; } } //////////////////////////////////////////////////////////// // Step 3: Attach an anonymous user to this request, if none // of the authentication modules created a user if (context.User == null) { context.SetPrincipalNoDemand(new GenericPrincipal(new GenericIdentity(String.Empty, String.Empty), new String[0]), false /*needToSetNativePrincipal*/); } Thread.CurrentPrincipal = context.User; } ///////////////////////////////////////////////////////////////////////////// void WriteErrorMessage(HttpContext context) { context.Response.Write(AuthFailedErrorFormatter.GetErrorText()); // In Integrated pipeline, ask for handler headers to be generated. This would be unnecessary // if we just threw an access denied exception, and used the standard error mechanism context.Response.GenerateResponseHeadersForHandler(); } } ////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////// internal class AuthFailedErrorFormatter : ErrorFormatter { private static string _strErrorText; private static object _syncObject = new object(); internal AuthFailedErrorFormatter() { } internal /*public*/ static string GetErrorText() { if (_strErrorText != null) return _strErrorText; lock(_syncObject) { if (_strErrorText == null) _strErrorText = (new AuthFailedErrorFormatter()).GetErrorMessage(); } return _strErrorText; } protected override string ErrorTitle { get { return SR.GetString(SR.Assess_Denied_Title);} } protected override string Description { get { return SR.GetString(SR.Assess_Denied_Description1); //"An error occurred while accessing the resources required to serve this request. This typically happens when you provide the wrong user-name and/or password."; } } protected override string MiscSectionTitle { get { return SR.GetString(SR.Assess_Denied_MiscTitle1);} //"Error message 401.1";} } protected override string MiscSectionContent { get { string miscContent = SR.GetString(SR.Assess_Denied_MiscContent1); AdaptiveMiscContent.Add(miscContent); return miscContent; //return "Logon credentials provided were not recognized. Make sure you are providing the correct user-name and password. Otherwise, ask the web server's administrator for help."; } } protected override string ColoredSquareTitle { get { return null;} } protected override string ColoredSquareContent { get { return null;} } protected override bool ShowSourceFileInfo { get { return false;} } } }[To be supplied.] ///
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