Hi,

I have a situation where Single Sign On using Kerberos (with Microsoft AD) is 
being used (Tomcat 7, SPNEGO, JNDIRealm).
All works fine and the user authenticates automatically with Tomcat and the 
Principal for that user is obtained which the web application can use.

The Web Application needs to consume a web-service (Sharepoint) on behalf of 
the user. CXF is being used as the Web Service client to consume this web 
service. I presume that what needs to be done (I might be wrong) is that a new 
Kerberos ticket for the User Principal needs to be obtained which correspond 
with the account of the remote web service (Sharepoint).

How, do I go about configuring the setup to have CXF pass a ticket which 
corresponds to the remote service (rather than the web app's account) for the 
authenticated User?

I suppose that some kind of credential delegation needs to be in place 
(possibly we need to do some GSS code ourselves?), and in some way the CXF 
Client needs to be informed about which ticket to include in the headers?

I also had a good look at these:
http://cxf.apache.org/docs/client-http-transport-including-ssl-support.html#ClientHTTPTransport%28includingSSLsupport%29-SpnegoAuthentication%28Kerberos%29

http://docs.oracle.com/javase/7/docs/jre/api/security/jaas/spec/com/sun/security/auth/module/Krb5LoginModule.html

But they seem to be referring to a fixed Principal where either the username is 
configured directly in spring, or the principal is specified in login.conf.
I need to use the Principal dynamically provided through Tomcat, depending on 
who is logged in.

My environment is as follows:
Java 1.7.0_04
Apache Tomcat 7.0.29
Apache CXF 2.6.1
Spring Framework 3.1.2.RELEASE

Thanks for your help.

Josef


Josef Bajada
Senior Technical Architect
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