Christian Schneider created KARAF-3459:
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             Summary: PropertiesLoginModule throws NPE when callbackHandler is 
null
                 Key: KARAF-3459
                 URL: https://issues.apache.org/jira/browse/KARAF-3459
             Project: Karaf
          Issue Type: Bug
          Components: karaf-security
            Reporter: Christian Schneider
            Assignee: Christian Schneider
             Fix For: 4.0.0, 3.0.3


That CXF JAASLoginInterceptor calls JAAS with a null CallBackhandler if no 
credentials are found. This results in a LoginException wrapping a NPE which is 
a bit cryptic for users.

I propose to check for null in PropertiesLoginModule and just not call the 
callBackHandler in this case. Then it will look like the user and password are 
null which result in a better exception.



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