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

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Date:   Thu, 16 Jul 2020 15:07:50 +0300
From:   Horia Geantă <horia.geanta@....com>
To:     Herbert Xu <herbert@...dor.apana.org.au>
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 7/16/2020 2:53 PM, Herbert Xu wrote:
> On Thu, Jul 16, 2020 at 01:35:51PM +0300, Horia Geantă wrote:
>>
>> This patch set adds support only for some AES-based algorithms.
>> However, going further the plan is to add all keyed algorithms
>> supported by caam.
>>
>> Thus I wouldn't tie the name to AES.
> 
> Yes but it's still exactly the same underlying feature as paes.
> So I don't want to have two ways of doing the same thing in the
> Crypto API.
> 
So instead of tk(cbc(aes)) use paes(cbc(aes) or cbc(paes)?

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

Thanks,
Horia