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From "Eric Yang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-15222) Refine proxy user authorization to support multiple ACL list
Date Tue, 13 Feb 2018 02:28:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-15222?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16361731#comment-16361731

Eric Yang commented on HADOOP-15222:

[~lmccay] Thank you for the summary.  This is aligned with the original problem statement.
 Role based ACL in standard J2EE web application would be the right approach to solve the
authorization problem.  User can describe in web.xml which url resource are allowed by roles.
 Roles are mapped to groups of users.  It would be nice to do the same in Hadoop.  Hadoop
web applications don't quite follow J2EE design pattern.  This made the problem hard to solve
for Hadoop.  We can start by turning Hadoop jetty Java code back to configuration, and maps
to roles.  In doing so, we might finish in 2-3 years of hard labour.  There might be better
ways to resolve this issue that we need to explore.

HADOOP-13119 is back ported to Hadoop 2.8.x as a new feature in Hadoop 2.8.  Do we revert
HADOOP-13119 from 2.8.x or we keep HADOOP-13119 as the temp solution until the new work is

> Refine proxy user authorization to support multiple ACL list
> ------------------------------------------------------------
>                 Key: HADOOP-15222
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15222
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: security
>    Affects Versions: 3.0.0
>            Reporter: Eric Yang
>            Priority: Major
> This Jira is responding to follow up work for HADOOP-14077.  The original goal of HADOOP-14077
is to have ability to support multiple ACL lists.  When checking for proxy user authorization
in AuthenticationFilter to ensure there is a way to authorize normal users and admin users
using separate proxy users ACL lists.  This was suggested in HADOOP-14060 to configure AuthenticationFilterWithProxyUser
this way:
> AuthenticationFilterWithProxyUser->StaticUserWebFilter->AuthenticationFIlterWithProxyUser
> This enables the second AuthenticationFilterWithProxyUser validates both credentials
claim by proxy user, and end user.
> However, there is a side effect that unauthorized users are not properly rejected with
403 FORBIDDEN message if there is no other web filter configured to handle the required authorization
> This JIRA is intend to discuss the work of HADOOP-14077 by either combine StaticUserWebFilter
+ second AuthenticationFilterWithProxyUser into a AuthorizationFilterWithProxyUser as a final
filter to evict unauthorized user, or revert both HADOOP-14077 and HADOOP-13119 to eliminate
the false positive in user authorization.

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