From: Mimi Zohar <zohar@linux.vnet.ibm.com>
To: "Woodhouse, David" <david.woodhouse@intel.com>
Cc: "gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"seth.forshee@canonical.com" <seth.forshee@canonical.com>,
"mricon@kernel.org" <mricon@kernel.org>,
"dhowells@redhat.com" <dhowells@redhat.com>,
"rusty@rustcorp.com.au" <rusty@rustcorp.com.au>,
"linux-security-module@vger.kernel.org"
<linux-security-module@vger.kernel.org>,
"jlee@suse.de" <jlee@suse.de>,
"kyle@kernel.org" <kyle@kernel.org>,
"gnomes@lxorguk.ukuu.org.uk" <gnomes@lxorguk.ukuu.org.uk>,
"james.l.morris@oracle.com" <james.l.morris@oracle.com>,
"mcgrof@suse.com" <mcgrof@suse.com>,
"serge@hallyn.com" <serge@hallyn.com>,
"linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
Subject: Re: [RFD] linux-firmware key arrangement for firmware signing
Date: Thu, 21 May 2015 12:22:20 -0400 [thread overview]
Message-ID: <1432225340.2450.6.camel@linux.vnet.ibm.com> (raw)
In-Reply-To: <1432224181.8004.7.camel@intel.com>
On Thu, 2015-05-21 at 16:03 +0000, Woodhouse, David wrote:
> On Thu, 2015-05-21 at 08:45 -0700, Greg Kroah-Hartman wrote:
> > On Thu, May 21, 2015 at 09:05:21AM -0400, Mimi Zohar wrote:
> > > Signatures don't provide any guarantees as to code quality or
> > > correctness. They do provide file integrity and provenance. In
> > > addition to the license and a Signed-off-by line, having the
> > > firmware provider include a signature of the firmware would be
> > > nice.
> >
> > That would be "nice", but that's not going to be happening here, from
> > what I can tell. The firmware provider should be putting the signature
> > inside the firmware image itself, and verifying it on the device, in
> > order to properly "know" that it should be running that firmware. The
> > kernel shouldn't be involved here at all, as Alan pointed out.
>
> In a lot of cases we have loadable firmware precisely to allow us to
> reduce the cost of the hardware. Adding cryptographic capability in the
> 'load firmware' state of the device isn't really compatible with that
> :)
>
> In the case where kernel and modules are signed, it *is* useful for a
> kernel device driver also to be able to validate that what it's about
> to load into a device is authentic. Where 'authentic' will originally
> just mean that it's come from the linux-firmware.git repository or the
> same entity that built (and signed) the kernel, but actually I *do*
> expect vendors who are actively maintaining the firmware images in
> linux-firmware.git to start providing detached signatures of their own.
That's great! What format do you expect the detached signatures to be?
Where will they reside?
Mimi
next prev parent reply other threads:[~2015-05-21 16:23 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-19 20:02 [RFD] linux-firmware key arrangement for firmware signing Luis R. Rodriguez
2015-05-19 20:40 ` Luis R. Rodriguez
2015-05-19 20:59 ` Andy Lutomirski
2015-05-19 22:11 ` Luis R. Rodriguez
2015-05-19 22:40 ` Andy Lutomirski
2015-05-19 23:30 ` Julian Calaby
2015-05-19 23:42 ` Andy Lutomirski
2015-05-20 0:39 ` Luis R. Rodriguez
2015-05-20 0:41 ` Andy Lutomirski
2015-05-21 22:26 ` Luis R. Rodriguez
2015-05-21 23:15 ` Casey Schaufler
2015-05-21 15:51 ` David Howells
2015-05-21 16:30 ` Mimi Zohar
2015-05-21 16:39 ` Andy Lutomirski
2015-05-21 16:51 ` Petko Manolov
2015-05-21 16:55 ` Andy Lutomirski
2015-05-21 17:44 ` Petko Manolov
2015-05-21 16:43 ` Petko Manolov
2015-05-21 16:48 ` Andy Lutomirski
2015-05-21 16:58 ` Petko Manolov
2015-05-21 16:59 ` Mimi Zohar
2015-05-19 21:48 ` Mimi Zohar
2015-05-19 22:19 ` Luis R. Rodriguez
2015-05-19 23:37 ` Mimi Zohar
2015-05-20 0:22 ` Luis R. Rodriguez
2015-05-20 1:06 ` Mimi Zohar
2015-05-20 1:29 ` Andy Lutomirski
2015-05-20 2:05 ` Mimi Zohar
2015-05-20 2:10 ` Andy Lutomirski
2015-05-20 15:49 ` Petko Manolov
2015-05-20 16:08 ` Petko Manolov
2015-05-20 14:04 ` Seth Forshee
2015-05-20 16:24 ` One Thousand Gnomes
2015-05-20 16:46 ` Petko Manolov
2015-05-21 4:41 ` Greg Kroah-Hartman
2015-05-21 5:41 ` Petko Manolov
2015-05-21 6:14 ` Greg Kroah-Hartman
2015-05-21 13:05 ` Mimi Zohar
2015-05-21 15:45 ` Greg Kroah-Hartman
2015-05-21 15:53 ` Petko Manolov
2015-05-21 16:57 ` Greg Kroah-Hartman
2015-05-26 17:08 ` One Thousand Gnomes
2015-05-26 19:15 ` Petko Manolov
2015-05-26 19:52 ` Mimi Zohar
2015-05-26 23:06 ` David Howells
2015-05-21 16:03 ` Woodhouse, David
2015-05-21 16:22 ` Mimi Zohar [this message]
2015-05-21 16:31 ` Woodhouse, David
2015-05-21 17:02 ` gregkh
2015-05-21 17:14 ` Petko Manolov
2015-05-21 18:23 ` Luis R. Rodriguez
2015-05-21 18:30 ` Luis R. Rodriguez
2015-05-21 19:32 ` Woodhouse, David
2015-05-21 17:49 ` Luis R. Rodriguez
2015-05-21 14:45 ` Petko Manolov
2015-05-21 22:50 ` Luis R. Rodriguez
2015-05-20 20:35 ` Kyle McMartin
2015-05-20 15:08 ` David Howells
2015-05-20 15:47 ` Seth Forshee
2015-05-21 16:23 ` David Howells
2015-05-20 15:14 ` David Howells
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