linux-kernel - Re: [PATCH 2/6] eCryptfs: Hash code to new crypto API

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Date:	Tue, 31 Oct 2006 12:05:05 +1100
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Michael Halcrow <mhalcrow@...ibm.com>
Cc:	akpm@...l.org, LKML <linux-kernel@...r.kernel.org>,
	Jeff Garzik <jeff@...zik.org>
Subject: Re: [PATCH 2/6] eCryptfs: Hash code to new crypto API

On Mon, Oct 30, 2006 at 05:35:29PM -0600, Michael Halcrow wrote:
>
> +	crypto_hash_init(&desc);
> +	crypto_hash_update(&desc, &sg, len);
> +	crypto_hash_final(&desc, dst);

Whenever you do init+update+final, it's preferred that this be
changed to crypto_hash_digest as this enables future optimisations
to be made.  For instance, some hardware can only handle a full
digest rather than a partial update.

Thanks,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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