linux-kernel - Re: [PATCH] MODSIGN: Change default key details [ver #2]

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Date:	Tue, 19 May 2015 16:19:02 +0100
From:	David Woodhouse <dwmw2@...radead.org>
To:	David Howells <dhowells@...hat.com>
Cc:	Michal Marek <mmarek@...e.cz>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Abelardo Ricart III <aricart@...nix.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Sedat Dilek <sedat.dilek@...il.com>, keyrings@...ux-nfs.org,
	Rusty Russell <rusty@...tcorp.com.au>,
	LSM List <linux-security-module@...r.kernel.org>,
	James Morris <james.l.morris@...cle.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH] MODSIGN: Change default key details [ver #2]

On Tue, 2015-05-19 at 15:14 +0100, David Howells wrote:
> 
> > Right. In this very thread :-). But are you fine with using *.auto for
> > the generated files? I'll send a rebased series.
> 
> Can you send me your patches and I'll add them to this:
> 
>         http://git.kernel.org/cgit/linux/kernel/git/dhowells/linux-fs.git/log/?h=modsign-pkcs7
> 
> Then I can integrate them with David Woodhouse's patches in the same
> area and pass the branch on to James Morris.

We're talking about these three patches, yes?

https://lkml.org/lkml/2015/2/20/546
https://lkml.org/lkml/2015/5/4/614
https://lkml.org/lkml/2015/5/7/488

I think the third is obsolete now that we allow the user to provide
their own certificate + key by setting CONFIG_MODULE_SIG_KEY, because
the in-tree signing_key.{priv,x509} are *always* autogenerated.

The first two I don't think go far enough. I dislike automatically
picking up files that were lying around in the tree, and it's still
going to break if there's a file with a space in its name.

Let's just introduce a new Kconfig option for 'extra certificates' which
takes the filename of a PEM-format file. We can process that into DER
form with some fairly trivial modifications to scripts/extract-cert.c.

-- 
David Woodhouse                            Open Source Technology Centre
David.Woodhouse@...el.com                              Intel Corporation


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