Date: Thu, 21 May 2015 19:43:14 +0300
From: Petko Manolov <petkan@mip-labs.com>
To: David Howells <dhowells@redhat.com>
Cc: "Luis R. Rodriguez" <mcgrof@suse.com>,
	Andy Lutomirski <luto@kernel.org>,
	linux-security-module@vger.kernel.org, james.l.morris@oracle.com,
	serge@hallyn.com, linux-kernel@vger.kernel.org,
	linux-wireless@vger.kernel.org, Kyle McMartin <kyle@kernel.org>,
	David Woodhouse <david.woodhouse@intel.com>,
	Seth Forshee <seth.forshee@canonical.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Joey Lee <jlee@suse.de>, Rusty Russell <rusty@rustcorp.com.au>,
	zohar@linux.vnet.ibm.com, mricon@kernel.org,
	Michal Marek <mmarek@suse.cz>,
	Abelardo Ricart III <aricart@memnix.com>,
	Sedat Dilek <sedat.dilek@gmail.com>, keyrings@linux-nfs.org,
	Borislav Petkov <bp@alien8.de>, Jiri Kosina <jkosina@suse.cz>,
	Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [RFD] linux-firmware key arrangement for firmware signing
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On 15-05-21 16:51:49, David Howells wrote:
> 
> I do have patches to parse PGP key data and add the public keys found therein
> onto the kernel keyring, but that would mean adding an extra key data parser.

PGP is widely used so i would gladly have one more parser in the kernel.

> You could probably do this with the integrity functions - but turning them on 
> has a performance cost and you have to load things in the right order as I 
> understand it.

The performance hit is negligible, especially on modern hardware.  The problem 
is that Joe user must wrap his head around IMA as a concept and go through the 
pains of doing everything right.  Failing to do so will result in a lot of 
frustration, and i speak from experience.

Once you make it run properly it mostly stays out of your way.  To put it 
another way: IMA is not for sissies... :)


		Petko