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

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Message-ID: <50813C15.1000202@ahsoftware.de>
Date:	Fri, 19 Oct 2012 13:40:05 +0200
From:	Alexander Holler <holler@...oftware.de>
To:	David Howells <dhowells@...hat.com>
CC:	Stephen Rothwell <sfr@...b.auug.org.au>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	David Miller <davem@...emloft.net>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: RFC: sign the modules at install time

Am 19.10.2012 13:25, schrieb David Howells:
> Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
>> 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.
>
> openssl uses /dev/urandom (unlike gpg), so that's less of a problem.

Hmm, please don't forget the case where people want to build the kernel 
in some sandbox (like chroot or similiar) where the build-system doesn't 
have access to /dev.

I haven't checked what openssl does if that is the case, so maybe the 
script which calls it should either offer a verbose error message for 
that case, or should be prepared that openssl might fail because of a 
missing /dev/urandom.

If that's already done, just ignore my email, I haven't read the 
complete thread, sorry.

Regards,

Alexander
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