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Message-ID: <CAHmME9qUPR0KTyr0TgiCA38-trMu1s_0C2uYq8u-S=kAWByZqQ@mail.gmail.com>
Date: Wed, 20 Sep 2017 16:09:46 +0200
From: "Jason A. Donenfeld" <Jason@...c4.com>
To: Stephan Mueller <smueller@...onox.de>
Cc: linux-security-module@...r.kernel.org, keyrings@...r.kernel.org,
kernel-hardening@...ts.openwall.com, LKML <linux-kernel@...r.kernel.org>,
David Howells <dhowells@...hat.com>, Eric Biggers <ebiggers3@...il.com>,
Herbert Xu <herbert@...dor.apana.org.au>, Kirill Marinushkin <k.marinushkin@...il.com>,
security@...nel.org, stable@...r.kernel.org
Subject: Re: [PATCH v6] security/keys: rewrite all of big_key crypto
On Wed, Sep 20, 2017 at 4:06 PM, Stephan Mueller <smueller@...onox.de> wrote:
>> Section 3 shows an attack with repeated nonces, which we don't do here.
>
> Maybe I miss a point here, but zero IVs is no repetition of nonces?
If there's a fresh key each time, then no, it's not a repetition.
This patch uses a fresh random key for every encryption.
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