linux-kernel - Re: [PATCH] xfrm: fix hmac(sha256) truncation length

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Message-ID: <20120308003741.GA14995@gondor.apana.org.au>
Date:	Thu, 8 Mar 2012 11:37:42 +1100
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Jarod Wilson <jarod@...hat.com>
Cc:	linux-kernel@...r.kernel.org, Paul Wouters <pwouters@...hat.com>,
	"David S. Miller" <davem@...emloft.net>,
	Martin Willi <martin@...ongswan.org>, netdev@...r.kernel.org,
	linux-crypto@...r.kernel.org
Subject: Re: [PATCH] xfrm: fix hmac(sha256) truncation length

On Wed, Mar 07, 2012 at 03:12:37PM -0500, Jarod Wilson wrote:
> Commit bc74b0c8af17458ecae77f725e507ab5fd100105 added proper hmac sha384
> and sha512 variants with truncation lengths of 192 and 256 respectively,
> per RFC4868:

No, it was done deliberately to maintain backwards compatibility.
Userspace should set the truncbits explicitly from now on.

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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