netdev - Re: IPSec hmac(sha256) truncation bits length

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Message-ID: <20150304123834.c27417981d6ef63c0b310e11@freescale.com>
Date:	Wed, 4 Mar 2015 12:38:34 -0600
From:	Kim Phillips <kim.phillips@...escale.com>
To:	Nicolae Rosia <nicolae.rosia@...il.com>
CC:	"linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
	"Herbert Xu" <herbert@...dor.apana.org.au>,
	James Morris <jmorris@...ercode.com.au>,
	<netdev@...r.kernel.org>
Subject: Re: IPSec hmac(sha256) truncation bits length

On Wed, 4 Mar 2015 20:28:26 +0200
Nicolae Rosia <nicolae.rosia@...il.com> wrote:

> On Wed, Mar 4, 2015 at 7:13 PM, Nicolae Rosia <nicolae.rosia@...il.com> wrote:
> > I'm trying to understand why icv_truncbits is set to 96 for
> > hmac(sha256) in xfrm_algo.c because
> > RFC4868 [1] says that the truncation length for HMAC-SHA256 should be 128.

See http://comments.gmane.org/gmane.linux.kernel.cryptoapi/6767

Kim
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