linux-kernel - Re: [DISCUSSION PATCH 00/41] random: possible ways towards NIST SP800-90B compliance

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Message-ID: <CAHmME9rMXORFXtwDAc8yxj+h9gytJj6DpvCxA-JMAAgyOP+5Yw@mail.gmail.com>
Date:   Mon, 21 Sep 2020 10:09:53 +0200
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     Nicolai Stange <nstange@...e.de>
Cc:     "Theodore Y. Ts'o" <tytso@....edu>,
        Linux Crypto Mailing List <linux-crypto@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        "Alexander E. Patrakov" <patrakov@...il.com>,
        "Ahmed S. Darwish" <darwish.07@...il.com>,
        Willy Tarreau <w@....eu>,
        Matthew Garrett <mjg59@...f.ucam.org>,
        Vito Caputo <vcaputo@...garu.com>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        Jan Kara <jack@...e.cz>, Ray Strode <rstrode@...hat.com>,
        William Jon McCann <mccann@....edu>,
        zhangjs <zachary@...shancloud.com>,
        Andy Lutomirski <luto@...nel.org>,
        Florian Weimer <fweimer@...hat.com>,
        Lennart Poettering <mzxreary@...inter.de>,
        Peter Matthias <matthias.peter@....bund.de>,
        Marcelo Henrique Cerri <marcelo.cerri@...onical.com>,
        Roman Drahtmueller <draht@...altsekun.de>,
        Neil Horman <nhorman@...hat.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Julia Lawall <julia.lawall@...ia.fr>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Andy Lavr <andy.lavr@...il.com>,
        Eric Biggers <ebiggers@...nel.org>,
        Stephan Müller <smueller@...onox.de>,
        Torsten Duwe <duwe@...e.de>, Petr Tesarik <ptesarik@...e.cz>
Subject: Re: [DISCUSSION PATCH 00/41] random: possible ways towards NIST
 SP800-90B compliance

I haven't looked into the details of this patchset yet, but your
description here indicates to me that this is motivated by FIPS
certification desires, which...worries me. I would like to rewrite the
RNG at some point, and I've started to work on a bunch of designs for
this (and proving them correct, too), but going about this via FIPS
certification or trying to implement some NIST specs is most certainly
the wrong way to go about this, will lock us into subpar crypto for
years, and is basically a waste of time.