Migrating Common Object Request Broker Architecture programmatic login to Java Authentication and Authorization Service (CORBA and JAAS)

Use this topic as an example of how to perform programmatic login using the CORBA-based programmatic login APIs.

1. Use the following as an example of how to perform programmatic login using the CORBA-based programmatic login APIs:
   The CORBA-based programmatic login APIs are replaced by JAAS login.

   Note: The LoginHelper application programming interface (API) that is used in the following example is deprecated in WebSphere Application Server Version 9.0 and will be removed in a future release. It is recommended that you use the JAAS programmatic login APIs that are shown in the next step.

   public class TestClient {
   ...
   private void performLogin() {
   // Get the ID and password of the user.
   String userid = customGetUserid();
   String password = customGetPassword();
   
   // Create a new security context to hold authentication data.
   LoginHelper loginHelper = new LoginHelper();
   try {
   // Provide the ID and password of the user for authentication.
   org.omg.SecurityLevel2.Credentials credentials = 
   loginHelper.login(userid, password);
   
   // Use the new credentials for all future invocations.
   loginHelper.setInvocationCredentials(credentials);
   // Retrieve the name of the user from the credentials
   // so we can tell the user that login succeeded.
   
   String username = loginHelper.getUserName(credentials);
   System.out.println("Security context set for user: "+username);
   } catch (org.omg.SecurityLevel2.LoginFailed e) {
   // Handle the LoginFailed exception.
   }
   }
   ...
   }

2. Use the following example to migrate the CORBA-based programmatic login APIs to the JAAS programmatic login APIs.

   The following example assumes that the application code is granted for the required Java 2 security permissions. For more information, see Configuring programmatic logins for Java Authentication and Authorization Service, Protecting system resources and APIs (Java 2 security) for developing applications, and the JAAS documentation located at http://www.ibm.com/developerworks/java/jdk/security/.

   public class TestClient {
   ...
   private void performLogin() {
   // Create a new JAAS LoginContext.
   javax.security.auth.login.LoginContext lc = null;
   
   try {
   // Use GUI prompt to gather the BasicAuth data.
   lc = new javax.security.auth.login.LoginContext("WSLogin",
   new com.ibm.websphere.security.auth.callback.WSGUICallbackHandlerImpl());
   
   // create a LoginContext and specify a CallbackHandler implementation
   // CallbackHandler implementation determine how authentication data is collected
   // in this case, the authentication date is collected by  login prompt
   //   and pass to the authentication mechanism implemented by the LoginModule.
   } catch (javax.security.auth.login.LoginException e) {
   System.err.println("ERROR: failed to instantiate a LoginContext and the exception: " 
   + e.getMessage());
   e.printStackTrace();
   
   // may be javax.security.auth.AuthPermission "createLoginContext" is not granted
   //   to the application, or the JAAS Login Configuration is not defined.
   }
   
   if (lc != null)
   try {
   lc.login();  // perform login
   javax.security.auth.Subject s = lc.getSubject();
   // get the authenticated subject
   
   // Invoke a J2EE resources using the authenticated subject
   com.ibm.websphere.security.auth.WSSubject.doAs(s,
   new java.security.PrivilegedAction() {
   public Object run() {
   try {
   bankAccount.deposit(100.00);  // where bankAccount is an protected EJB
   } catch (Exception e) {
   System.out.println("ERROR: error while accessing EJB resource, exception: " 
   + e.getMessage());
   e.printStackTrace();
   }
   return null;
   }
   }
   );
   
   // Retrieve the name of the principal from the Subject
   // so we can tell the user that login succeeded,
   // should only be one WSPrincipal.
   java.util.Set ps = 
   s.getPrincipals(com.ibm.websphere.security.auth.WSPrincipal.class);
   java.util.Iterator it = ps.iterator();
   while (it.hasNext()) {
   com.ibm.websphere.security.auth.WSPrincipal p =
   (com.ibm.websphere.security.auth.WSPrincipal) it.next();
   System.out.println("Principal: " + p.getName());
   }
   } catch (javax.security.auth.login.LoginException e) {
   System.err.println("ERROR: login failed with exception: " + e.getMessage());
   e.printStackTrace();
   
   // login failed, might want to provide relogin logic
   }
   }
   ...
   }