Re: security propagation from JAAS context to EJB question

[David Jencks]

On Jun 18, 2009, at 5:28 AM, Juergen Weber wrote:

Hi,

I opened a JAAS LoginContext in a JSP (the JSP runs under
<security-constraint>) and called an EJB using a PrivilegedAction  
with the
resulting subject. It looks like the subject is not propagated to  
the EJB.
Also it looks like the currently active web user cannot be gotten by  
JAAS.
So, it looks like there is a separation between Container authority  
and
JAAS.

Is that behaviour OK?

(the background of all this is we'd like to use <security- 
constraint> for
the web app, but the EJB call be with a technical user. Also, the  
EJB call
is much deeper in the call stack than the authentication of the  
technical
user, so the call should be in a PrivilegedAction with the subject  
bound).

I don't understand exactly what you are trying to do but maybe you  
want to authenicate in a jsp rather than using a built in auth  
method?  And then use the resulting Subject in container managed  
authorization??

The way to do this is to use one of the ContextManager.login methods  
so your Subject gets registered with geronimo, and then tell geronimo  
to use your Subject with

ContextManager.setCallers(subject,subject)

or if you want  to imitate "run-as" functionality

Callers oldCallers = ContextManager.pushSubject(subject);
try {
//dostuff
} finally {
  ContextManager.popCallers(oldCallers);
}

(hopefully I remembered the method names and sigs rightly)

hope this helps

david jencks

Thanks,
Juergen

I have put some comments with System.out output into the code

Subject subjectjsp =  
Subject.getSubject(AccessController.getContext());
System.out.println("JSP subject:" + subjectjsp);
// JSP subject:null. Why isn't this the user logged in to the webapp?

SimpleCallbackHandler handler = new
SimpleCallbackHandler("tomcat","tomcat".toCharArray());

LoginContext loginCtx = new LoginContext("geronimo-admin", handler);
loginCtx.login();
Subject subject = loginCtx.getSubject();
Set<Principal> principals = subject.getPrincipals();

System.out.println("principals:" + principals);
// principals:[tomcat, admin, tomcatgroup]

PrivilegedAction action = new PrivilegedAction() {

        public Object run()
        {
                Subject subject = 
Subject.getSubject(AccessController.getContext());
                
                System.out.println("inner subject:" + subject);
                // inner subject:Subject:
               //        Principal: tomcat
               //        Principal: admin
               //        Principal: tomcatgroup

                Context context;
                try
                {
                        context = new InitialContext();
                        
                        Secured3 secured3 = (Secured3)
context.lookup("java:comp/env/ejb/Secured3");
                        String secureMethod = secured3.secureMethod("hello");
                        System.out.println("secureMethod: " + secureMethod);

                // ctx.getCallerPrincipal():
                // secureMethod: Hello hello at Thu Jun 18 13:55:49 CEST 2009
org.apache.openejb.core.stateless.statelesscont...@133b364 you are:
org.apache.openejb.core.unauthenticatedprinci...@1884ac4


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