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Message-ID: <878tkzq6wi.fsf@purkki.adurom.net>
Date: Sun, 11 Jun 2017 11:13:01 +0300
From: Kalle Valo <kvalo@...eaurora.org>
To: "Jason A. Donenfeld" <Jason@...c4.com>
Cc: linux-kernel@...r.kernel.org, kernel-hardening@...ts.openwall.com, Anna Schumaker <anna.schumaker@...app.com>, David Howells <dhowells@...hat.com>, David Safford <safford@...ibm.com>, "David S. Miller" <davem@...emloft.net>, Gilad Ben-Yossef <gilad@...yossef.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Gustavo Padovan <gustavo@...ovan.org>, "J. Bruce Fields" <bfields@...ldses.org>, Jeff Layton <jlayton@...chiereds.net>, Johan Hedberg <johan.hedberg@...il.com>, Johannes Berg <johannes@...solutions.net>, Marcel Holtmann <marcel@...tmann.org>, Mimi Zohar <zohar@...ux.vnet.ibm.com>, Trond Myklebust <trond.myklebust@...marydata.com>, keyrings@...r.kernel.org, linux-bluetooth@...r.kernel.org, linux-nfs@...r.kernel.org, linux-wireless@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH 0/6] Constant Time Memory Comparisons Are Important
"Jason A. Donenfeld" <Jason@...c4.com> writes:
> Whenever you're comparing two MACs, it's important to do this using
> crypto_memneq instead of memcmp. With memcmp, you leak timing information,
> which could then be used to iteratively forge a MAC.
Do you have any pointers where I could learn more about this?
--
Kalle Valo
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