This example shows how to use the WSLogin application login configuration from within a Java 2 Platform, Enterprise Edition (J2EE) application to log in and get a Subject that contains the user ID and the password of the target realm.
javax.security.auth.Subject subject = null;
try
{
// Create a login context using the WSLogin login configuration and specify a
// user ID, target realm, and password. Note: If the target_realm_name is the
// same as the current realm, an authenticated Subject is created. However, if
// the target_realm_name is different from the current realm, a basic
// authentication Subject is created that is not validated. This unvalidated
// Subject is created so that you can send a request to the different target
// realm with valid security credentials for that realm.
javax.security.auth.login.LoginContext ctx = new LoginContext("WSLogin",
new WSCallbackHandlerImpl("userid", "target_realm_name", "password"));
// Note: The following code is an alternative that validates the user ID and
// password specified against the target realm. The code performs a remote call
// to the target server and will return true if the user ID and password are
// valid and false if the user ID and password are not valid. If false is
// returned, a WSLoginFailedException exception is created. You can catch
// that exception and perform a retry or stop the request from flowing by
// allowing that exception to surface out of this login.
// ALTERNATIVE LOGIN CONTEXT THAT VALIDATES THE USER ID AND PASSWORD TO THE
// TARGET REALM
/**** currently remarked out ****
java.util.Map appContext = new java.util.HashMap();
appContext.put(javax.naming.Context.INITIAL_CONTEXT_FACTORY,
"com.ibm.websphere.naming.WsnInitialContextFactory");
appContext.put(javax.naming.Context.PROVIDER_URL,
"corbaloc:iiop:target_host:2809");
javax.security.auth.login.LoginContext ctx = new LoginContext("WSLogin",
new WSCallbackHandlerImpl("userid", "target_realm_name", "password", appContext));
**** currently remarked out ****/
// Starts the login
ctx.login();
// Gets the Subject from the context
subject = ctx.getSubject();
}
catch (javax.security.auth.login.LoginException e)
{
throw new com.ibm.websphere.security.auth.WSLoginFailedException (e.getMessage(), e);
}
if (subject != null)
{
// Defines a privileged action that encapsulates your remote request.
java.security.PrivilegedAction myAction = java.security.PrivilegedAction()
{
public Object run()
{
// Assumes a proxy is already defined. This example method returns a String
return proxy.remoteRequest();
}
});
// Starts this action using the basic authentication Subject needed for
// the target realm security requirements.
String myResult = (String) com.ibm.websphere.security.auth.WSSubject.doAs
(subject, myAction);
}