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

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Message-ID: <1431790781.9552.0.camel@infradead.org>
Date:	Sat, 16 May 2015 16:39:41 +0100
From:	David Woodhouse <dwmw2@...radead.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Abelardo Ricart III <aricart@...nix.com>,
	Michal Marek <mmarek@...e.cz>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Sedat Dilek <sedat.dilek@...il.com>,
	David Howells <dhowells@...hat.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 Mon, 2015-05-04 at 11:45 -0700, Linus Torvalds wrote:
> On Sun, May 3, 2015 at 6:45 PM, Linus Torvalds
> <torvalds@...ux-foundation.org> wrote:
> >
> > I'd much rather see "x509.genkey" be generated with a move-if-changed
> > pattern, so that it only changes if (a) it didn't exist before or (b)
> > it actually has new content.
> 
> Hmm. Something like the attached, to make the .x509.list file be
> properly generated?
> 
> That still leaves the problem that the X509_CERTIFICATES variable
> itself seems to be badly defined, in that it ends up randomly having
> the "./" in front of the filename due to confusion between
> "signing_key.x509" being both in
> 
>    X509_CERTIFICATES-y := $(wildcard *.x509) $(wildcard $(srctree)/*.x509)
> 
> (when that .x509 file was pre-existing), and
> 
>    X509_CERTIFICATES-$(CONFIG_MODULE_SIG) += $(objtree)/signing_key.x509
> 
> where I think that "$(objtree)/" comes in.
> 
> DavidH, comments?

Why not just take multiple certs in PEM form in a single file, rather
than automatically including *.x509 in DER form? Wouldn't that be a
whole lot easier? 

We can still have a special case for signing_key.x509 if we want it.

-- 
dwmw2

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

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