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https://issues.apache.org/jira/browse/HADOOP-13984?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pierre Sauvage updated HADOOP-13984:
------------------------------------
    Description: 
It is possible, with /L, to force lowercase in auth_to_local mapping process 
(e.g. LOWER@HADOOP.DOMAIN -> lower).
But the opposite, using /U, is not possible
(e.g upper@HADOOP.DOMAIN -> UPPER)
The ability of forcing uppercase is important when using Active Directory with 
cross-realm trust since Active Directory is case insensitive (you can both 
kinit foo...@ad.domain.com and foo...@ad.domain.com).

  was:
It is possible, with /L, to force lowercase in auth_to_local mapping process 
(e.g. LOWER@HADOOP.DOMAIN -> lower).
But the opposite, using /U, is not possible
(e.g upper@HADOOP.DOMAIN -> UPPER)



> Cannot force uppercase through auth_to_local
> --------------------------------------------
>
>                 Key: HADOOP-13984
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13984
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: security
>            Reporter: Pierre Sauvage
>
> It is possible, with /L, to force lowercase in auth_to_local mapping process 
> (e.g. LOWER@HADOOP.DOMAIN -> lower).
> But the opposite, using /U, is not possible
> (e.g upper@HADOOP.DOMAIN -> UPPER)
> The ability of forcing uppercase is important when using Active Directory 
> with cross-realm trust since Active Directory is case insensitive (you can 
> both kinit foo...@ad.domain.com and foo...@ad.domain.com).



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