distributing custom policy

Security News wakesec at gmail.com
Wed Jun 15 18:53:09 UTC 2005

Sorry, in the first post I meant to say that I wanted to install the
policycoreutils<version>.rpm  (the devil really is in the details.)

--the reason for needing this rpm is that I am hoping to be able to
install a custom policy and file-labelling without installing the
source configuration files.  This is just so that even a root user
could be kept from editing my policy.conf files.  I need the coreutils
b/c if the source config files are not going to be present then
neither is the Makefile, so I would need to use "fixfiles relabel" and

Unless, there is a better way to load and relabel when not installing
the config source files.

I am hoping to have this installation be performed by someone else
somewhere else, and to make the installation as mindless as possible
for them.



On 6/15/05, Stephen Smalley <sds at tycho.nsa.gov> wrote:
> On Wed, 2005-06-15 at 14:27 -0400, Security News wrote:
> > Anyone have any thoughts on the best way to install my own policy
> > files on a few machines.
> >
> > I have to go out and find a way to install a policy file, install my
> > own file_context files, and then compile and load the new custom
> > policy and fc files.
> >
> > These systems would be running standard FC3 with the targetted policy,
> > but without the targetted sources.
> >
> > I would like to set them all up so that they then have my own version
> > of the strict policy, without having the source files installed.
> >
> > Is rpm the best way to attack this or are there better options out
> > there?  As I see it I would have to include the
> > policy-strict-<version>.rpm as well as setools-<version>.rpm within my
> > own rpm file in order to load everything necessary to load the policy
> > and relabel the filesystem.
> setools isn't needed for SELinux operation; they are purely optional
> tools for policy analysis and management.
> It sounds like you want to perform a wholesale replacement of the policy
> on these systems.  That should be feasible without requiring policy
> sources on the end systems (in the future, it will be possible to also
> distribute binary policy modules that can be linked into the base policy
> on the end systems without requiring sources on the end systems, but
> that support won't be available until FC5).
> I'm not sure why you need anything other than a selinux-policy-strict
> package (which contains the binary policy file, the file_contexts
> configuration, and other policy-related config files) with a modified
> post scriptlet in the spec file to perform the conversion (e.g. switch
> to permissive mode, change /etc/selinux/config, load new policy, relabel
> filesystems, reboot).  Naturally, the devil is in the details; you'll
> want to try it on a non-production system first.
> --
> Stephen Smalley
> National Security Agency

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