Subject: Re: security capabilities on filesystems
From: Stephen Smalley <sds@tycho.nsa.gov>
To: Lukasz Stelmach <stlman@poczta.fm>
Cc: linux-kernel@vger.kernel.org
In-Reply-To: <43DD1FB7.9050509@poczta.fm>
References: <43DD1FB7.9050509@poczta.fm>
Content-Type: text/plain
Organization: National Security Agency
Date: Mon, 30 Jan 2006 11:13:15 -0500
Message-Id: <1138637595.7076.86.camel@moss-spartans.epoch.ncsc.mil>
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On Sun, 2006-01-29 at 21:04 +0100, Lukasz Stelmach wrote:
> Greetings.
> 
> I've poke around for some information but all I got (was this lousy t-shirt)
> that there is no support for capablities stored on a filesystem. However, I'd
> like to ask if there are any chances to see this feature soon.

Storage of the capability bits isn't the hard part; that is especially
easy these days given the extensible security namespace for extended
attributes that was introduced for SELinux (but not limited to it).

# touch foo
# setfattr -n security.capability.effcap -v 0xdeadbeef foo
# getfattr -e hex -n security.capability.effcap foo
# file: foo
security.capability.effcap=0xdeadbeef

-- 
Stephen Smalley
National Security Agency

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