linux-kernel - Re: [PATCH] lib: memcmp_nta: add timing-attack secure memcmp

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20130210235057.GA5485@kroah.com>
Date:	Sun, 10 Feb 2013 15:50:57 -0800
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Daniel Borkmann <dborkman@...hat.com>
Cc:	Joe Perches <joe@...ches.com>, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] lib: memcmp_nta: add timing-attack secure memcmp

On Mon, Feb 11, 2013 at 12:30:51AM +0100, Daniel Borkmann wrote:
> On 02/11/2013 12:24 AM, Joe Perches wrote:
> >On Sun, 2013-02-10 at 23:00 +0100, Daniel Borkmann wrote:
> >>add memcmp_nta ({n}o {t}iming {a}ttacks)
> >
> >Why should this be in the kernel?
> 
> As the commit message already says, so that current or future (e.g.) network
> protocol code or modules can make use of this when dealing with cryptographic
> hash comparisons.

Do we have any in-kernel users that need this?  If not, then don't add
it now, but rather, add it when we actually have a user.  We almost
never add kernel functions that no one calls, that would be just
wasteful.

sorry,

greg k-h
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/