[jira] [Created] (CASSANDRA-5651) Custom authentication plugin should not need to prepopulate users in system_auth.users column family

["Bao Le (JIRA)" <ji...@apache.org>]

Bao Le created CASSANDRA-5651:
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             Summary: Custom authentication plugin should not need to prepopulate users in system_auth.users column family
                 Key: CASSANDRA-5651
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5651
             Project: Cassandra
          Issue Type: Improvement
          Components: Core
    Affects Versions: 1.2.5
         Environment: RHEL 6.3, jdk 1.7
            Reporter: Bao Le


Current implementation in ClientState.login makes a call to Auth.isExistingUser(user.getName()) if the AuthenticatedUser is not Anonymous. This involves querying system_auth.users column family.

Our custom authentication plugin does not need to pre-create and store users, and it worked fine under 1.1.5. On 1.2.5, however, we run into authentication problem because of this.

I feel we  should either do this isExistingUser check inside IAuthenticator.authenticate, or expose another boolean method similar to IAuthenticator.requireAuthentication() so that custom authentication plugin can skip this isExistingUser check if needed. 

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