Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / Security / PassportAuthenticationModule.cs / 2 / PassportAuthenticationModule.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* * PassportAuthenticationModule class * * Copyright (c) 1999 Microsoft Corporation */ namespace System.Web.Security { using System.Web; using System.Security.Principal; using System.Web.Configuration; using System.Web.Handlers; using System.Globalization; using System.Security.Permissions; using System.Web.Management; ////// This /// module provides a wrapper around passport authentication services. /// [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] public sealed class PassportAuthenticationModule : IHttpModule { private PassportAuthenticationEventHandler _eventHandler; private static bool _fAuthChecked = false; private static bool _fAuthRequired = false; private static String _LoginUrl = null; ////// [SecurityPermission(SecurityAction.Demand, Unrestricted=true)] public PassportAuthenticationModule() { } //////////////////////////////////////////////////////////// // AddOnAuthenticate and RemoveOnAuthenticate: Use these // methods to hook up event handlers to handle the // OnAuthenticate Event ////// Initializes a new instance of the ////// class. /// /// This is a global.asax event that must be /// named PassportAuthenticate_OnAuthenticate event. /// public event PassportAuthenticationEventHandler Authenticate { add { _eventHandler += value; } remove { _eventHandler -= value; } } ////// public void Dispose() { } ///[To be supplied.] ////// public void Init(HttpApplication app) { app.AuthenticateRequest += new EventHandler(this.OnEnter); app.EndRequest += new EventHandler(this.OnLeave); } //////////////////////////////////////////////////////////// // OnAuthenticate: Custom Authentication modules can override // this method to create a custom IPrincipal object from // a PassportIdentity ///[To be supplied.] ////// Calls the /// PassportAuthentication_OnAuthenticate handler, if one exists. /// void OnAuthenticate(PassportAuthenticationEventArgs e) { //////////////////////////////////////////////////////////// // If there are event handlers, invoke the handlers if (_eventHandler != null) { _eventHandler(this, e); if (e.Context.User == null && e.User != null) { InternalSecurityPermissions.ControlPrincipal.Demand(); e.Context.User = e.User; } } //////////////////////////////////////////////////////////// // Default Implementation: If IPrincipal has not been created, // create a PassportUser if (e.Context.User == null) { InternalSecurityPermissions.ControlPrincipal.Demand(); e.Context.User = new PassportPrincipal(e.Identity, new String[0]); } } //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// // Methods for internal implementation ////// /// void OnEnter(Object source, EventArgs eventArgs) { if (_fAuthChecked && !_fAuthRequired) return; HttpApplication app; HttpContext context; app = (HttpApplication)source; context = app.Context; if (!_fAuthChecked) { AuthenticationSection settings = RuntimeConfig.GetAppConfig().Authentication; settings.ValidateAuthenticationMode(); _fAuthRequired = (settings.Mode == AuthenticationMode.Passport); _LoginUrl = settings.Passport.RedirectUrl; _fAuthChecked = true; } if (!_fAuthRequired) return; //////////////////////////////////////////////////////// // Step 1: See if this request is valid or not // VSWhidbey 442515: We no longer need to do this check, always proceed //////////////////////////////////////////////////////// // Step 2: Create a Passport Identity from the credentials // from IIS PassportIdentity identity = new PassportIdentity(); //////////////////////////////////////////////////////// // Step 4: Call OnAuthenticate virtual method to create // an IPrincipal for this request OnAuthenticate( new PassportAuthenticationEventArgs(identity, context) ); //////////////////////////////////////////////////////// // Skip AuthZ if accessing the login page context.SetSkipAuthorizationNoDemand(AuthenticationConfig.AccessingLoginPage(context, _LoginUrl), false /*managedOnly*/); if (!context.SkipAuthorization) { context.SkipAuthorization = AssemblyResourceLoader.IsValidWebResourceRequest(context); } } void OnLeave(Object source, EventArgs eventArgs) { HttpApplication app; HttpContext context; app = (HttpApplication)source; context = app.Context; if (!_fAuthChecked || !_fAuthRequired || context.User == null || context.User.Identity == null || !(context.User.Identity is PassportIdentity)) return; PassportIdentity id = (PassportIdentity) context.User.Identity; if (context.Response.StatusCode != 401 || id.WWWAuthHeaderSet) return; if ( _LoginUrl==null || _LoginUrl.Length < 1 || String.Compare(_LoginUrl, "internal", StringComparison.Ordinal) == 0) { context.Response.Clear(); context.Response.StatusCode = 200; if (!ErrorFormatter.RequiresAdaptiveErrorReporting(context)) { String strUrl = context.Request.Url.ToString(); int iPos = strUrl.IndexOf('?'); if (iPos >= 0) { strUrl = strUrl.Substring(0, iPos); } String strLogoTag = id.LogoTag2(HttpUtility.UrlEncode(strUrl, context.Request.ContentEncoding)); String strMsg = SR.GetString(SR.PassportAuthFailed, strLogoTag); context.Response.Write(strMsg); } else { ErrorFormatter errorFormatter = new PassportAuthFailedErrorFormatter(); context.Response.Write(errorFormatter.GetAdaptiveErrorMessage(context, true)); } } else { //////////////////////////////////////////////////////////// // Step 1: Get the redirect url String redirectUrl = AuthenticationConfig.GetCompleteLoginUrl(context, _LoginUrl); //////////////////////////////////////////////////////////// // Step 2: Check if we have a valid url to the redirect-page if (redirectUrl == null || redirectUrl.Length <= 0) throw new HttpException(SR.GetString(SR.Invalid_Passport_Redirect_URL)); //////////////////////////////////////////////////////////// // Step 3: Construct the redirect-to url String strUrl = context.Request.Url.ToString(); String strRedirect; int iIndex; String strSep; if (redirectUrl.IndexOf('?') >= 0) strSep = "&"; else strSep = "?"; strRedirect = redirectUrl + strSep + "ReturnUrl=" + HttpUtility.UrlEncode(strUrl, context.Request.ContentEncoding); //////////////////////////////////////////////////////////// // Step 4: Add the query-string from the current url iIndex = strUrl.IndexOf('?'); if (iIndex >= 0 && iIndex < strUrl.Length-1) strRedirect += "&" + strUrl.Substring(iIndex+1); //////////////////////////////////////////////////////////// // Step 5: Do the redirect context.Response.Redirect(strRedirect, false); } } } ////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////// // ErrorFormatter for generating adaptive error for mobile devices internal class PassportAuthFailedErrorFormatter : ErrorFormatter { protected override string ErrorTitle { get { return SR.GetString(SR.PassportAuthFailed_Title);} } protected override string Description { get { return SR.GetString(SR.PassportAuthFailed_Description);} } protected override string MiscSectionTitle { get { return SR.GetString(SR.Assess_Denied_Title);} } protected override string MiscSectionContent { get { return null;} } protected override string ColoredSquareTitle { get { return null;} } protected override string ColoredSquareContent { get { return null;} } protected override bool ShowSourceFileInfo { get { return false;} } } }
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