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From "Erik.fang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5126) implement authorized HDFS user impersonation
Date Thu, 22 Aug 2013 07:18:52 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5126?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13747332#comment-13747332
] 

Erik.fang commented on HDFS-5126:
---------------------------------

I will submit a patch for prototype later
                
> implement authorized HDFS user impersonation
> --------------------------------------------
>
>                 Key: HDFS-5126
>                 URL: https://issues.apache.org/jira/browse/HDFS-5126
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: security
>            Reporter: Erik.fang
>            Priority: Minor
>              Labels: features, security
>
> I propose a authorized user impersonate mechanism for fine grain (path level) access
control in HDFS.
> In short, owner of data encrypt the path with a shared secret, and other user use the
encrypted path to call namenode service (create/read/delete file). Namenode decrypt the path
to validate the access and execute the operation as owner of the data if valid. It consists
of:
> 1. a ACLFileSystem extends DistributedFileSystem, which wrap the create/open/delete/etc.
RPC calls, and send the encrypted path to namenode
> 2. authenticator(embedded in namenode), which decrypt the path and execute the call as
owner of the data
> With authorized user impersonate, we can develop a authorization manager to check whether
a path level access is permitted.
> A detailed explanation can be found in maillist:
> http://mail-archives.apache.org/mod_mbox/hive-dev/201308.mbox/%3CCACkoVCxm+=44kB_4eWtepHe_knkdm0Uzyh=0q-vfybYU8eLQxw@mail.gmail.com%3E

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