Programmatically add roles after authentication

Question

I have the following JSF 2.1 login form, running in Glassfish 3.1

<h:form id="loginForm">
        <h:panelGrid columns="2" cellspacing="5">
            <h:outputText value="Username" />
            <h:inputText value="#{loginHandler.username}" />
            <h:outputText value="Password:" />
            <h:inputText value="#{loginHandler.password}" />
            <h:outputLabel value="" />
            <h:commandButton value="Login" action="#{loginHandler.login}" />
        </h:panelGrid>
    </h:form>

And the following backing bean.

public String login() throws IOException, LoginException {

    log.debug("Trying to login with username " + username);

    HttpSession session = getRequest().getSession(true);

    try {
        getRequest().login(username, password);

        // if OK, add Roles
                    ????????
                    ...................

    } catch (ServletException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }


    log.debug("USER principal === " + getRequest().getUserPrincipal());

    return "home";
}

The question is, how can I add roles programmatically to the UserPrincipal after successful login?

Update 1: I tried to get the Subject by using the following code but subject == null.

Subject thisSubject = Subject.getSubject(AccessController
                .getContext());

Thanks, Coen

Answer 1

I came up with the following solution to add roles programmatically after login, which works at least on GlassFish 3.1.2 build 23.

import com.sun.enterprise.security.SecurityContext;
import com.sun.enterprise.security.web.integration.PrincipalGroupFactory;
import java.security.Principal;
import java.util.Set;
import javax.security.auth.Subject;
import org.glassfish.security.common.Group;

public class GlassFishUtils {
    public static void addGroupToCurrentUser(String groupName, String realmName) {
        Subject subject = SecurityContext.getCurrent().getSubject();
        Set<Principal> principals = subject.getPrincipals();
        Group group = PrincipalGroupFactory.getGroupInstance(groupName, realmName);
        if (!principals.contains(group))
            principals.add(group);
    }
}

You will need to add security.jar and common-util.jar from GlassFish to your project libraries.

And don't forget to create a <security-role> section in your web.xml for the roles you wish to add.

Note that I am using functionality which does not appear to be part of a published stable API, so there is no guarantee that this will keep working in future releases of GlassFish.

I got the information on how to add roles from the source code of sun.appserv.security.AppservPasswordLoginModule.commit() of GlassFish. If a future GlassFish release breaks my code, this function would be a good place to start in order to find out how to fix it.