linux-kernel - Re: [Security] [patch] random: make get_random

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Message-Id: <200905161009.32178.lkml@morethan.org>
Date:	Sat, 16 May 2009 10:09:28 -0500
From:	"Michael S. Zick" <lkml@...ethan.org>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Ingo Molnar <mingo@...e.hu>, Willy Tarreau <w@....eu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	security@...nel.org, Linux@...a.kernel.org, stable@...nel.org,
	Cox <alan@...rguk.ukuu.org.uk>, Arjan@...a.kernel.org,
	List <linux-kernel@...r.kernel.org>, Alan@...a.kernel.org,
	Eric Paris <eparis@...hat.com>, Jake Edge <jake@....net>,
	linux-security-module@...r.kernel.org, mingo@...hat.com,
	Matt Mackall <mpm@...enic.com>, Dave Jones <davej@...hat.com>,
	James Morris <jmorris@...ei.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Roland McGrath <roland@...hat.com>
Subject: Re: [Security] [patch] random: make get_random_int() more random

On Sat May 16 2009, Arjan van de Ven wrote:
> On Sat, 16 May 2009 09:28:16 -0500
> "Michael S. Zick" <lkml@...ethan.org> wrote:
> > 
> > Still getting kernel messages that there isn't a test for the rng - -
> > One (of many) ways to test the quality is to submit a bit string
> > sample to the Berlekamp-Massey algorithm; perhaps from repeated calls
> > to the generation function (it depends on your desired confidence
> > level).
> > 
> 
> or we bite the bullet and implement the Fortuna PRNG algorithm
> and feed it as much as we can, rather than caring if any if the sources
> is not 100.000% perfect.
> 

A reasonable cross-platform solution.
I just had to ping for supporting the VIA specific hardware solution.

Mike
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