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From "angela (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (JCR-2420) Node removal fails with AccessDeniedException
Date Wed, 10 Mar 2010 15:21:29 GMT

     [ https://issues.apache.org/jira/browse/JCR-2420?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

angela resolved JCR-2420.
-------------------------

       Resolution: Fixed
    Fix Version/s: 2.1.0
         Assignee: angela

fixed with rev. 921394
thanks for reporting this issue.

> Node removal fails with AccessDeniedException
> ---------------------------------------------
>
>                 Key: JCR-2420
>                 URL: https://issues.apache.org/jira/browse/JCR-2420
>             Project: Jackrabbit Content Repository
>          Issue Type: Bug
>          Components: jackrabbit-core, security
>    Affects Versions: 1.6.0
>            Reporter: Michael Stämpfli
>            Assignee: angela
>            Priority: Blocker
>             Fix For: 2.1.0
>
>
> I have a hierarchy of nodes which are all access controllable. The following hierarchy
illustrates the setup for my problem.
> root  -  read permissions to everyone
>   | - subFolder  -  all permissions to user A
>         | - subsubFolder  -  all permissions to user A
> The user A has all rights from the node "subFolder" downwards.
> I tried to remove the node "subsubFolder" with the user A. Clearly A has enough permissions
to remove the node. But as soon as I call Session.save() an AccessDeniedException is thrown.
> I did a lot of debugging and found a possible cause for this fault. It led me to the
function ACLProvider.AclPermissions.buildResult(). All line references are based on the source
code in the subversion repository found here: http://svn.apache.org/viewvc/jackrabbit/tags/1.6.0/jackrabbit-core/src/main/java/org/apache/jackrabbit/core/security/authorization/acl/ACLProvider.java?view=markup.
> On line 458 Jackrabbit collects all access control entries of the node, that I want to
remove, and all its parents and puts it in the variable "entries". In my example this variable
contains three entries:
> 1. all permissions to user A
> 2. all permissions to user A
> 3. read permissions to everyone
> On lines 460 - 466 it collects all access control entries of the node, that I want to
remove, and puts it in "localACEs". This variable contains one entry: all permissions to user
A.
> If I want to be able to remove "subsubFolder", user A needs the permission from the parent
node. The permissions of the parent nodes of "subsubFolder" are: all permissions to user A
and read permissions to everyone. But that's where the access check fails. In line 488 Jackrabbit
checks if a permission from "entries" is local or not by looking it up in "localACEs". If
it is in there, the permission is local, else not. Unfortunately it recognizes the permission
of the node "subFolder" as local. Thus the permissions of the parent nodes of "subsubFolder"
are: read permissions to everyone. So I cannot remove the node.
> The source of the error is the equals check of the access control entries. The permissions
of node "subFolder" are considered equal to the one of "subsubFolder". If I explicitly assign
the permission "remove node permission to user A" to the node "subFolder", it works fine,
because it is recognized as parent permission.

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