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From "Alejandro Abdelnur (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-8465) hadoop-auth should support ephemeral authentication
Date Fri, 01 Jun 2012 20:44:23 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8465?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13287653#comment-13287653

Alejandro Abdelnur commented on HADOOP-8465:

This can be addressed by allowing an AuthenticationHandler to set the expiration of the authentication
token to ZERO (note that only ZERO would be supported, the AuthenticationHandler cannot change
to an arbitrary expiration interval).

When the expiration is set to ZERO, the AuthenticationFilter would let the request continue
to the target resource but it will not issue an HTTP Cookie. This means that subsequent requests
will be forced through the AuthenticationHandler.

This will work with webhdfs delegation tokens where the delegationtoken must be part of the
querystring of the request.
> hadoop-auth should support ephemeral authentication
> ---------------------------------------------------
>                 Key: HADOOP-8465
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8465
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: security
>    Affects Versions: 2.0.1-alpha
>            Reporter: Alejandro Abdelnur
>            Assignee: Alejandro Abdelnur
>             Fix For: 2.0.1-alpha
> Currently, once a client is authenticated the generated authentication-token (& cookie)
are valid for a given (service configurable) lifespan.
> Once the authentication-token (& cookie) is issued, the authentication logic will
not be triggered until the authentication-token expires.
> This behavior does not work well with delegation tokens expected behavior where delegation
tokens can be canceled at any time.
> Having ephemeral authentication (which is check on every request) would address this

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