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https://issues.apache.org/jira/browse/SOLR-10814?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16070777#comment-16070777
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Ishan Chattopadhyaya commented on SOLR-10814:
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[~noblepaul], I think the objective is to be able to re-use the authorization
configs across BasicAuth and Kerberos. Kerberos requires that principals have
the realm, but basicAuth usernames are simple ones.
I agree with the objectives and the patch in general. However, as I mentioned,
my major concerns are (a) backward compatibility (maybe the latest patch takes
care of it) and (b) I don't think we should be deprecating getUserPrincipal(),
which the authorization plugins have had available till now -- I don't mind
getUsername() being used in out of the box authz plugins going forward, but I
don't want to break or forcefully upgrade any third party using plugin that
uses the full user principal; e.g. Ranger plugin maybe? [~bosco], any
thoughts?.
Noble, what do you think on the latter issue?
> Solr RuleBasedAuthorization config doesn't work seamlessly with kerberos
> authentication
> ---------------------------------------------------------------------------------------
>
> Key: SOLR-10814
> URL: https://issues.apache.org/jira/browse/SOLR-10814
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Affects Versions: 6.2
> Reporter: Hrishikesh Gadre
>
> Solr allows configuring roles to control user access to the system. This is
> accomplished through rule-based permission definitions which are assigned to
> users.
> The authorization framework in Solr passes the information about the request
> (to be authorized) using an instance of AuthorizationContext class. Currently
> the only way to extract authenticated user is via getUserPrincipal() method
> which returns an instance of java.security.Principal class. The
> RuleBasedAuthorizationPlugin implementation invokes getName() method on the
> Principal instance to fetch the list of associated roles.
> https://github.com/apache/lucene-solr/blob/2271e73e763b17f971731f6f69d6ffe46c40b944/solr/core/src/java/org/apache/solr/security/RuleBasedAuthorizationPlugin.java#L156
> In case of basic authentication mechanism, the principal is the userName.
> Hence it works fine. But in case of kerberos authentication, the user
> principal also contains the RELM information e.g. instead of foo, it would
> return [email protected]. This means if the user changes the authentication
> mechanism, he would also need to change the user-role mapping in
> authorization section to use [email protected] instead of foo. This is not
> good from usability perspective.
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