linux-kernel - Re: RFC: sign the modules at install time

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sat, 20 Oct 2012 14:23:49 +1030
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	David Miller <davem@...emloft.net>,
	David Howells <dhowells@...hat.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: RFC: sign the modules at install time

Stephen Rothwell <sfr@...b.auug.org.au> writes:
> Hi Rusty,
>
> On Fri, 19 Oct 2012 11:53:15 +1030 Rusty Russell <rusty@...tcorp.com.au> wrote:
>>
>> Linus Torvalds <torvalds@...ux-foundation.org> writes:
>> > On Wed, Oct 17, 2012 at 10:34 PM, Rusty Russell <rusty@...tcorp.com.au> wrote:
>> >>
>> >> Hacking the keyid and signer-name to be extracted every time by
>> >> sign-file takes my modules_install time from 18.6 seconds to 19.1.  We'd
>> >> get that back easily by making sign-file a perl script anyway; it calls
>> >> out to perl 3 times already.
>> >
>> > Ok, that tiny slowdown seems worth the cleanup, especially if we'd get
>> > it back from somebody re-writing it in perl.
>> >
>> > Want to sign off on the two patches, or put them in your git tree?
>> 
>> Smerged them together: no point moving the x509keyid script now.
>> I dropped the optional dst arg, since we don't use it.
>
> So, this still generates the keys during the normal build, right?  That
> would be a problem for build servers that have limited randomness
> available to them, I think.

Yes.  You can either continue to disable module signatures, or copy some
pre-made keys in the toplevel: signing_key.priv and signing_key.x509.

Cheers,
Rusty.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/