linux-kernel - Re: [PATCH v9 8/9] crypto: caam - enable prediction resistance in HRWNG

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Date:   Fri, 20 Mar 2020 17:49:07 +0200
From:   Horia Geantă <horia.geanta@....com>
To:     Andrey Smirnov <andrew.smirnov@...il.com>,
        linux-crypto@...r.kernel.org
Cc:     Andrei Botila <andrei.botila@....com>,
        Chris Healy <cphealy@...il.com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Iuliana Prodan <iuliana.prodan@....com>,
        linux-kernel@...r.kernel.org, linux-imx@....com
Subject: Re: [PATCH v9 8/9] crypto: caam - enable prediction resistance in
 HRWNG

On 3/19/2020 6:13 PM, Andrey Smirnov wrote:
> Instantiate CAAM RNG with prediction resistance enabled to improve its
> quality (with PR on DRNG is forced to reseed from TRNG every time
> random data is generated).
> 
> Management Complex firmware with version lower than 10.20.0
> doesn't provide prediction resistance support. Consider this
> and only instantiate rng when mc f/w version is lower.
> 
> Signed-off-by: Andrey Smirnov <andrew.smirnov@...il.com>
> Signed-off-by: Andrei Botila <andrei.botila@....com>
> Cc: Chris Healy <cphealy@...il.com>
> Cc: Lucas Stach <l.stach@...gutronix.de>
> Cc: Horia Geantă <horia.geanta@....com>
> Cc: Herbert Xu <herbert@...dor.apana.org.au>
> Cc: Iuliana Prodan <iuliana.prodan@....com>
> Cc: linux-crypto@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Cc: linux-imx@....com
Reviewed-by: Horia Geantă <horia.geanta@....com>

Thanks,
Horia