linux-kernel - Re: [PATCH v4 5/5] crypto: AES CBC multi-buffer glue code

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Message-ID: <20151211032340.GC10399@gondor.apana.org.au>
Date:	Fri, 11 Dec 2015 11:23:40 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Tim Chen <tim.c.chen@...ux.intel.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	"David S.Miller" <davem@...emloft.net>,
	Stephan Mueller <smueller@...onox.de>,
	Chandramouli Narayanan <mouli_7982@...oo.com>,
	Vinodh Gopal <vinodh.gopal@...el.com>,
	James Guilford <james.guilford@...el.com>,
	Wajdi Feghali <wajdi.k.feghali@...el.com>,
	Jussi Kivilinna <jussi.kivilinna@....fi>,
	linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 5/5] crypto: AES CBC multi-buffer glue code

On Thu, Dec 10, 2015 at 08:39:45AM -0800, Tim Chen wrote:
>
> The inner cipher is called synchronously from the outer layer 
> async cipher algorithm in cbc_mb_async_ablk_decrypt via
> 
>         err = crypto_blkcipher_crt(child_tfm)->decrypt(
>                 &rctx->desc, req->dst, req->src, req->nbytes);

We should avoid bypassing the API and directly calling crypto
driver functions like this.

What if you made it a proper ablkcipher and just called it through
the API?

Thanks,
-- 
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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