linux-kernel - Re: [PATCH 2/2] crypto: caam - support tagged keys for skcipher algorithms

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Date:   Thu, 16 Jul 2020 22:19:32 +1000
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Horia Geantă <horia.geanta@....com>
Cc:     Iuliana Prodan <iuliana.prodan@....com>,
        Aymen Sghaier <aymen.sghaier@....com>,
        "David S. Miller" <davem@...emloft.net>,
        Silvano Di Ninno <silvano.dininno@....com>,
        Franck Lenormand <franck.lenormand@....com>,
        "linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        dl-linux-imx <linux-imx@....com>
Subject: Re: [PATCH 2/2] crypto: caam - support tagged keys for skcipher
 algorithms

On Thu, Jul 16, 2020 at 03:07:50PM +0300, Horia Geantă wrote:
>
> So instead of tk(cbc(aes)) use paes(cbc(aes) or cbc(paes)?

Well if we're following the existing paes model then it'd be
cbc(paes).

> How would this work for hmac(sha512),
> paes(hmac(sha512)) or hmac(psha512), or even phmac(sha512)?

Perhaps hmac(psha512).

The point is whatever scheme you come up with has to be consistent
across all drivers.

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