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Re: Problem implementing path-based authorization with authz

From: Rob van Oostrum <rvanoo_at_gmail.com>
Date: Sat, 9 Jan 2010 12:58:56 -0500

I see now. The path "/project/!svn" makes no sense. It doesn't exist in the
repository, so that rule doesn't do anything. The !svn is a SVN-internal
concept. To assign permissions to /project, you need to have to specify:

[/project]
* = r

Do a search on the old list archives on tigris for some background. If I
remember correctly, you cannot have less than global read permissions on the
repository's root if you're on SVN 1.5 or later.

Hope this helps,
Rob

On Sat, Jan 9, 2010 at 12:09 PM, Brian Topping <topping_at_codehaus.org> wrote:

> Thanks, but that is incorrect. I have no problem downloading sources with
> a single rule of "[/project] *=r", nor do I have a problem correctly
> resolving group memberships that a user has assigned to them. As well, I
> have tested that a user who is not logged in cannot access the repository.
>
> Arguably, this is a problem with Apache HTTPD, not SVN. I posted here
> because I thought that it was more likely that someone here had approached
> this problem and solved it. My apologies in advance if anyone takes issue
> with that.
>
> Cheers, Brian
>
> On Jan 9, 2010, at 11:58 AM, Rob van Oostrum wrote:
>
> Your problem is with Crowd, not authz. Authentication is failing: "Could
> not authenticate to server: rejected Basic challenge (https://dev.host.net
> )"
>
> Check your Crowd configuration/documentation. I'd suggest taking SVN out of
> the equation and verifying that your integration with Crowd is working
> first.
>
> Cheers,
> Rob
>
> On Sat, Jan 9, 2010 at 1:19 AM, Brian Topping <topping_at_codehaus.org>wrote:
>
>> Hello all,
>>
>> I've been wrestling with getting authz setup in a way that must be
>> somewhat unconventional all week and was hoping someone here on the list
>> might be able to offer some insight. The environment is Apache httpd
>> 2.2.3, mod_dav_svn 1.6.6, and Subversion 1.6.6. My configs follow.
>>
>> So far, most of the docs that I've seen on authz start by granting read
>> access to everyone at the root of the tree, then subtracting authorizations
>> to specific sensitive directories. My concern with this is that this allows
>> people to lazily create directories without considering that they might be
>> granting access to any valid user.
>>
>> Instead, I would like to configure path-based access to deny access to all
>> non-root directories, then rely on specific grants to individual directories
>> based on group.
>>
>> I have groups working fine, but as soon as I lock down the root directory,
>> my svn client gets the following problem:
>>
>> Username: svn: PROPFIND of '/repos/project/!svn/vcc/default':
>> authorization failed: Could not authenticate to server: rejected Basic
>> challenge (https://dev.host.net)
>>
>>
>> I understand about the metadata located at !svn. So I added:
>>
>> [/project/!svn]
>> * = r
>>
>>
>> But this doesn't seem to do anything. I still get the first error.
>>
>> Is there a way to do what I am trying to do?
>>
>> I have exhaustively tested that the AuthHandler is doing asking the right
>> questions of the authentication broker and is able to recover the correct
>> user and group mappings.
>>
>> Note that I am using Atlassian's Crowd-based auth. This is a fork of
>> standard authz to patch Crowd users and groups in, but it would be easy for
>> me to convert to direct LDAP if necessary.
>>
>> /etc/httpd/conf.d/subversion.conf:
>>
>> <Location /repos>
>>
>> LoadModule perl_module modules/mod_perl.so
>> LoadModule dav_svn_module modules/mod_dav_svn.so
>>
>> # Uncomment this to enable the repository
>> DAV svn
>>
>> # Set this to the path to your repository
>> SVNParentPath /var/www/svn/
>>
>> SSLRequireSSL
>>
>> AuthName crowd
>> AuthType Basic
>>
>> PerlAuthenHandler Apache::CrowdAuth
>> PerlSetVar CrowdAppName subversion
>> PerlSetVar CrowdAppPassword xxx
>> PerlSetVar CrowdSOAPURL
>> https://dev.host.net/crowd/services/SecurityServer
>>
>> PerlAuthzHandler Apache::CrowdAuthz
>> PerlSetVar CrowdAuthzSVNAccessFile /var/www/svn/access
>>
>> require valid-user
>>
>>
>> </Location>
>>
>>
>> /var/www/svn/access
>>
>> [/project/!svn]
>> * = r
>>
>> [/project/trunk/project-web]
>> @project-web-developer = rw
>>
>>
>> Cheers, Brian
>>
>
>
>
Received on 2010-01-09 18:59:31 CET

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