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https://issues.apache.org/jira/browse/KARAF-2364?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13689892#comment-13689892
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Michael Menousek commented on KARAF-2364:
-----------------------------------------

Thanks [~ffang].  We'll give it a shot.
                
> org.apache.karaf.jaas.boot.principal.RolePrincipal class should implement 
> Group, not Principal
> ----------------------------------------------------------------------------------------------
>
>                 Key: KARAF-2364
>                 URL: https://issues.apache.org/jira/browse/KARAF-2364
>             Project: Karaf
>          Issue Type: Bug
>    Affects Versions: 2.3.1
>            Reporter: Scott Tustison
>            Assignee: Freeman Fang
>
> When using the Karaf JAAS LDAPLoginModule in combination with Apache CXF (or 
> a similar product), there is no way to determine whether the Principal 
> obtained from the Subject corresponds to a user or a role(group). CXF 
> (org.apache.cxf.interceptor.security.DefaultSecurityContext.findPrincipal()) 
> will attempt to pull out a Principal which is not a java.security.acl.Group. 
> However, since the JAAS login module does not make use of the 
> java.security.acl.Group interface for its RolePrincipal, there is no way to 
> determine the correct Principal to use. This can end up with Apache CXF 
> generating a SAML assertion for a group that belongs to a user instead of the 
> user itself, which is obviously invalid.
> If RolePrincipal implemented Group instead of Principal it would fix this 
> issue.

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