packaging web applications, SELinux

[Chuck Anderson]

On Tue, Jun 16, 2009 at 04:46:00PM +0100, Paul Howarth wrote:
> On 16/06/09 16:34, Chuck Anderson wrote:
>> Is there any pointer to best practices for packing a web application
>> that provides static content, cgi scripts, integrates with Apache
>> configuration, and works with SELinux?  How should I package the
>> SELinux policy needed to make this work?
>>
>> The Packaging Guidelines mention Web Applications, but not how to make
>> them work with SELinux:
>>
>> https://fedoraproject.org/wiki/Packaging/Guidelines#Web_Applications
>
> Do you already have the policy for your webapp written?
>
> If so, you can proceed according to
> https://fedoraproject.org/wiki/SELinux_Policy_Modules_Packaging_Draft
> but better still would be to post your policy on fedora-selinux-list for  
> comment and get it merged into the main Fedora policy and upstream.

No policy yet.  I think I just need file_contexts to go along with the 
standard ones:

/srv/([^/]*/)?www(/.*)?	system_u:object_r:httpd_sys_content_t:s0
/var/www(/.*)?	system_u:object_r:httpd_sys_content_t:s0
/var/www(/.*)?/logs(/.*)?	system_u:object_r:httpd_log_t:s0
/var/www/[^/]*/cgi-bin(/.*)?	system_u:object_r:httpd_sys_script_exec_t:s0
/var/www/perl(/.*)?	system_u:object_r:httpd_sys_script_exec_t:s0
/var/www/icons(/.*)?	system_u:object_r:httpd_sys_content_t:s0
/var/www/html/[^/]*/cgi-bin(/.*)?	system_u:object_r:httpd_sys_script_exec_t:s0
/var/www/cgi-bin(/.*)?	system_u:object_r:httpd_sys_script_exec_t:s0

I found that Debian has pretty well-defined (draft) guidelines for web 
applications:

http://webapps-common.alioth.debian.org/draft/html/

that standardizes on /usr/share/PACKAGE/www for static content and 
/usr/lib/cgi-bin/PACKAGE for arch-dependent dynamically executed 
content.

If we could come up with a similiar standard, then we could add 
standard SELinux file_contexts to deal with it, such as:

/usr/share/[^/]*/www(/.*)?	system_u:object_r:httpd_sys_content_t:s0
/usr/share/[^/]*/cgi-bin(/.*)?	system_u:object_r:httpd_sys_script_exec_t:s0
/usr//lib(64)?/[^/]*/cgi-bin(/.*)?	system_u:object_r:httpd_sys_script_exec_t:s0