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Date: Tue, 6 Jun 2017 19:30:33 +0200
From: "Jason A. Donenfeld" <Jason@...c4.com>
To: Eric Biggers <ebiggers3@...il.com>
Cc: David Howells <dhowells@...hat.com>, "Theodore Ts'o" <tytso@....edu>,
Linux Crypto Mailing List <linux-crypto@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>,
kernel-hardening@...ts.openwall.com,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>, David Miller <davem@...emloft.net>,
Herbert Xu <herbert@...dor.apana.org.au>, Stephan Mueller <smueller@...onox.de>
Subject: Re: Re: [PATCH v3 04/13] crypto/rng: ensure that
the RNG is ready before using
On Tue, Jun 6, 2017 at 7:26 PM, Eric Biggers <ebiggers3@...il.com> wrote:
> I agree that the use of ECB mode in big_key is broken, and thanks for trying to
> fix it! I think using GCM is good, but please leave a very conspicuous comment
> where the nonce is being set to 0, noting that it's safe only because a unique
> key is used to encrypt every big_key *and* the big_keys are not updatable (via
> an .update method in the key_type), resulting in each GCM key being used for
> only a single encryption.
Good idea. I'll make a large comment about this.
>
> Also, I think you should send this to the keyrings mailing list and maintainer
> so it can be discussed and merged separately from your RNG changes.
Yea, that seems like a good idea. I'll separate things out right now.
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