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https://issues.apache.org/jira/browse/DERBY-3335?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12561406#action_12561406
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Daniel John Debrunner commented on DERBY-3335:
----------------------------------------------

A better name for the property might be:  user.canonical   (or user.cnf). The 
property's name would be a public static final field in the UserAuthenticator 
interface.

> Allow UserAuthenticator.authenticateUser to work with authorization 
> identifiers and not user name.
> --------------------------------------------------------------------------------------------------
>
>                 Key: DERBY-3335
>                 URL: https://issues.apache.org/jira/browse/DERBY-3335
>             Project: Derby
>          Issue Type: Improvement
>          Components: Security
>            Reporter: Daniel John Debrunner
>            Priority: Minor
>
> Add a new method to UserAuthenticator that allows the authentication scheme 
> to request that the user name passed into authenticateUser is an 
> authentication identifier. This would absolve authentication schemes from 
> each implementing the mapping from user name to authorization identifier. 
> Implementing the logic in each scheme is pointless and subject to errors if a 
> different set of rules is implemented by the scheme (say by a coding bug).
> Signature could be
> /**
>   Return true if the identifier argument to authenticateUser is to represent 
> an authorization identifier,
>    false if it is to represent the user name.
>    Note the identifier argument passed into authenticateUser  is provided by 
> the database engine.
>    @since 10.x  If this method does exist then a return of false is assumed.
> */
> public boolean authenticateUsingAuthorizationId();
> The first argument to authenticateUser would change for userName to 
> identifier with appropriate comment changes.

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