linux-kernel - Re: [PATCH RFC v3 2/3] crypto: RSA: KEYS: convert rsa and public key to new PKE API

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Message-ID: <20150604065333.GB22158@gondor.apana.org.au>
Date:	Thu, 4 Jun 2015 14:53:33 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Tadeusz Struk <tadeusz.struk@...el.com>
Cc:	linux-kernel@...r.kernel.org, keescook@...omium.org,
	jwboyer@...hat.com, richard@....at, steved@...hat.com,
	qat-linux@...el.com, dhowells@...hat.com,
	linux-crypto@...r.kernel.org, james.l.morris@...cle.com,
	jkosina@...e.cz, zohar@...ux.vnet.ibm.com, davem@...emloft.net,
	vgoyal@...hat.com
Subject: Re: [PATCH RFC v3 2/3] crypto: RSA: KEYS: convert rsa and public key
 to new PKE API

On Wed, Jun 03, 2015 at 03:44:14PM -0700, Tadeusz Struk wrote:
> Change the existing rsa and public key code to integrate it
> with the new Public Key Encryption API.
> 
> Signed-off-by: Tadeusz Struk <tadeusz.struk@...el.com>

I'd like to see this split into multiple patches.  First of all
the new crypto_akcipher implementation should coexist with the
existing code.  That way the exiting users can be converted over
one-by-one.

Also you should implement the crypto_akcipher completely before
converting anybody over, that means doing encoding/wrapping in
addition to the crypto.

That way we don't have to have craziness like converting in and
out of MPI multiple times.

Lastly you should consider adding an MPI helper that writes to
an existing buffer instead of allocating a new one and copying
it over.

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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