linux-kernel - Re: Accelerate GCM with PCLMULQDQ-NI

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Date:	Sun, 29 Mar 2009 15:43:26 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Huang Ying <ying.huang@...el.com>
Cc:	Sebastian Andrzej Siewior <linux-crypto@...breakpoint.cc>,
	linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org
Subject: Re: Accelerate GCM with PCLMULQDQ-NI

On Wed, Mar 18, 2009 at 04:52:12PM +0800, Huang Ying wrote:
>
> To accelerate GCM with it, I make the following design:
> 
> 1. Implement ghash as an ahash algorithm, Use ghash in gcm
> implementation.
> 2. Provide a new implementation of ghash with PCLMULQDQ-NI.
> 
> What do you think about that?

Sounds OK to me.  I presume the choice of ahash instead of shash
is due to the use of XMM registers, just like AES?

Cheers,
-- 
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