Hi Oliver,
I don't think there is a HTTP Basic authentication realm. The authentication type is 
declared in the <auth-method> of your web.xml and can be used in conjunction 
with a number of different realm implementations.

Exactly what do you mean by re-use? Does this mean you are doing authentication 
from within your web app?
My application is exposing a SOAP service (through Spring-WS servlet) for which I want to do method-level access control. Since the service endpoint already uses container-based HTTP Basic authentication, I'd like to reuse the realm implementation (and configuration, obviously) in my own code to get hold of the user's roles.

I just found HttpServletRequest#getUserPrincipal() , maybe I can just downcast the result to org.apache.catalina.realm.GenericPrincipal and invoke getRoles() on this... ugly, but well... ;)

Cheers,
Tobi


Oliver



-----Original Message-----
From: users-return-242237-OLIVER.TANGLIN=saic....@tomcat.apache.org on behalf 
of Tobias Gierke
Sent: Tue 6/11/2013 11:20 AM
To: users@tomcat.apache.org
Subject: Possible to expose a Tomcat Realm instance through JNDI ?
Hi,

In my web app, I'd like to re-use the (server-wide) Tomcat Realm that is
already being used for HTTP Basic authentication but couldn't find a way
how to get hold of the actual Realm instance.

I spent quite some time looking for a solution (complicated by the fact
that most Google hits actually referred to the LDAP authentication
realm) but found none. Is  there a "config-file-only" solution or do I
need to dig into the Tomcat source code and come up with my own JNDI
ObjectFactory to achieve this ?

Cheers,
Tobias



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