itextsharp barcode example vb.net Using JAAS Authentication in the Virtual Trainer in Java

Drawer Data Matrix ECC200 in Java Using JAAS Authentication in the Virtual Trainer

Using JAAS Authentication in the Virtual Trainer
Data Matrix 2d Barcode Generation In Java
Using Barcode maker for Java Control to generate, create Data Matrix 2d barcode image in Java applications.
Data Matrix Recognizer In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
While it would certainly be possible to call into the JAAS layer directly from the Virtual Trainer s application logic for example, from the UserRegistry bean a more reusable solution is to encapsulate the JAAS interface in a custom ActionListener This approach decouples the security completely from your application and takes advantage of the intended use of the ActionListener extension hook The mechanics of providing such an ActionListener are described in 12, but let s review briefly here The first step is to modify the faces-configxml file for the trainercomponents reusable component library so that it includes the action-listener declaration, as shown next
Bar Code Maker In Java
Using Barcode drawer for Java Control to generate, create barcode image in Java applications.
Barcode Reader In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
<application> <action-listener> comjsfcompreftrainercomponentsutilJAASActionListener </action-listener> </application>
Make Data Matrix In C#.NET
Using Barcode creator for .NET framework Control to generate, create ECC200 image in .NET framework applications.
Data Matrix 2d Barcode Printer In VS .NET
Using Barcode encoder for ASP.NET Control to generate, create Data Matrix image in ASP.NET applications.
Then, leverage the decorator pattern, as described in 12, to delegate most of the work to the real ActionListener by providing a constructor that saves a reference to it Following the constructor, the processAction( ) method must be implemented, as described in the following
Data Matrix Generation In Visual Studio .NET
Using Barcode drawer for VS .NET Control to generate, create Data Matrix 2d barcode image in Visual Studio .NET applications.
Data Matrix ECC200 Generation In VB.NET
Using Barcode creator for .NET Control to generate, create DataMatrix image in Visual Studio .NET applications.
private ActionListener parent = null;
Matrix 2D Barcode Creator In Java
Using Barcode generation for Java Control to generate, create Matrix 2D Barcode image in Java applications.
Code 39 Drawer In Java
Using Barcode encoder for Java Control to generate, create Code-39 image in Java applications.
15:
Paint USS-128 In Java
Using Barcode printer for Java Control to generate, create EAN 128 image in Java applications.
UPC-A Supplement 5 Generation In Java
Using Barcode encoder for Java Control to generate, create Universal Product Code version A image in Java applications.
Securing JavaServer Faces Applications
USPS PLANET Barcode Drawer In Java
Using Barcode drawer for Java Control to generate, create Planet image in Java applications.
Reading Data Matrix In Visual Basic .NET
Using Barcode reader for .NET framework Control to read, scan read, scan image in .NET applications.
public void processAction(ActionEvent event) throws AbortProcessingException { FacesContext context = FacesContextgetCurrentInstance(); ValueHolder comp = null; String userid = null, password = null; JAASHelper jaasHelper = new JAASHelper(); // Check to see if they are on the login page boolean onLoginPage = (-1 != contextgetViewRoot()getViewId() lastIndexOf("login")) true : false; if (onLoginPage) { if (null != (comp = (ValueHolder) contextgetViewRoot()findComponent("form:userid"))) { userid = (String) compgetValue(); } if (null != (comp = (ValueHolder) contextgetViewRoot()findComponent("form:password"))) { password = (String) compgetValue(); } // If JAAS authentication failed if (!jaasHelperauthenticate(userid, password)) { contextgetApplication()getNavigationHandler() handleNavigation(context, null, "login"); return; } else { // Subject must not be null, since authentication succeeded assert(null != jaasHelpergetSubject()); // Put the authenticated subject in the session contextgetExternalContext()getSessionMap()put(JAASSubject, jaasHelpergetSubject()); } } parentprocessAction(event); // use JAAS to perform viewId level authorization // The ForcedLoginPhaseListener already forced the user to log in // before reaching this page Subject subject = (Subject) contextgetExternalContext() getSessionMap()get(JAASSubject); assert(null != subject); // If the user doesn t have permission to view this viewId if (!jaasHelperhasPermissionToAccessViewId(subject, context getViewRoot()getViewId())) { // Put error messages in the request Map requestMap = contextgetExternalContext()getRequestMap(); requestMapput("userid", userid); requestMapput("requiredPermission", "trainer"); requestMapput("viewId", contextgetViewRoot()getViewId()); // Redirect to the insufficientPermissions page contextgetApplication()getNavigationHandler() handleNavigation(context, null, "insufficientPermissions"); } }
Creating Code 128 Code Set C In VS .NET
Using Barcode generator for .NET framework Control to generate, create Code128 image in VS .NET applications.
UPC-A Decoder In .NET
Using Barcode reader for VS .NET Control to read, scan read, scan image in VS .NET applications.
PART III
EAN13 Maker In None
Using Barcode generator for Software Control to generate, create EAN-13 image in Software applications.
Matrix 2D Barcode Generation In .NET Framework
Using Barcode creation for Visual Studio .NET Control to generate, create Matrix 2D Barcode image in .NET applications.
Part III:
Encoding Code39 In .NET Framework
Using Barcode drawer for VS .NET Control to generate, create USS Code 39 image in VS .NET applications.
Drawing ECC200 In None
Using Barcode creator for Online Control to generate, create Data Matrix ECC200 image in Online applications.
Applying JavaServer Faces
The first thing to note is that part of the usage contract for JAASActionListener is the requirement that the username and password components be nested inside a UIForm named form , and be named userid and password , respectively This expedient measure allows the JAASActionListener to easily extract the user-provided values for username and password so that they can be passed on to the JAASHelper class The second thing to note about the usage contract is the requirement that the application provide a navigation rule for the outcome login that causes the user to be directed to the login page if the authentication failed In the failure case, processAction( ) is not called until after redirecting to the login outcome using NavigationHandler If authentication succeeded, the Subject is stored in the session for later access The javasecuritySubject is the Java class that represents the user to the runtime (We ll cover Subject in greater detail in the section on JAAS authentication) Finally, the parent processAction( ) method is called to do the normal action handling Note that this causes the existing application-managed authentication, as described in 9, to take place A production-quality implementation would probably remove the application-managed authentication in favor of using JAAS, rather than just supplementing it, as we have done here Let s examine the JAASHelper class
public class JAASHelper { LoginContext loginContext = null; public JAASHelper() { } public boolean authenticate(String userid, String password) { boolean result = false; try { loginContext = new LoginContext("FileLogin", new LoginCallback(userid, password)); loginContextlogin(); result = true; } catch (LoginException e) { // A production-quality implementation would log this message result = false; } return result; } public Subject getSubject () { Subject result = null; if (null != loginContext) { result = loginContextgetSubject(); } return result; } public static class LoginCallback implements CallbackHandler { private String userName = null; private String password = null;
15:
Copyright © OnBarcode.com . All rights reserved.