linux-kernel - Re: [PATCH v2 2/2] crypto: caam - strip input without changing crypto request

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Date:   Wed, 15 May 2019 14:00:38 +0000
From:   Iuliana Prodan <iuliana.prodan@....com>
To:     Horia Geanta <horia.geanta@....com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Aymen Sghaier <aymen.sghaier@....com>
CC:     "David S. Miller" <davem@...emloft.net>,
        "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 v2 2/2] crypto: caam - strip input without changing crypto
 request

On 5/15/2019 3:59 PM, Horia Geanta wrote:
> On 5/15/2019 2:25 PM, Iuliana Prodan wrote:
>> For rsa/pkcs1pad(rsa-caam, sha256), CAAM expects an input of modulus size.
> Only for sha256?
No, is not just sha256. Is a combination of rsa-caam and a hash 
algorithm. I'll send a new version to fix the commit message.
> 
>> For this we strip the leading zeros in case the size is more than modulus.
>> This commit avoids modifying the crypto request while striping zeros from
>                                                          ^^^ stripping
> 
> Horia
>