linux-kernel - Re: [PATCH v2 8/9] random: use hash function for crng_slow

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Message-ID: <YgN7nmv9A0+Zi5L8@owl.dominikbrodowski.net>
Date:   Wed, 9 Feb 2022 09:30:22 +0100
From:   Dominik Brodowski <linux@...inikbrodowski.net>
To:     "Jason A. Donenfeld" <Jason@...c4.com>
Cc:     linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
        tytso@....edu, ebiggers@...nel.org
Subject: Re: [PATCH v2 8/9] random: use hash function for crng_slow_load()

Am Wed, Feb 09, 2022 at 02:19:18AM +0100 schrieb Jason A. Donenfeld:
> Since we have a hash function that's really fast, and the goal of
> crng_slow_load() is reportedly to "touch all of the crng's state", we
> can just hash the old state together with the new state and call it a
> day. This way we dont need to reason about another LFSR or worry about
> various attacks there. This code is only ever used at early boot and
> then never again.

	Reviewed-by: Dominik Brodowski <linux@...inikbrodowski.net>

Thanks,
	Dominik