linux-kernel - Re: [PATCH v2] crypto: sun4i-ss: support the Security System PRNG

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Message-ID: <20161214060340.GA24050@Red>
Date:   Wed, 14 Dec 2016 07:03:40 +0100
From:   Corentin Labbe <clabbe.montjoie@...il.com>
To:     Herbert Xu <herbert@...dor.apana.org.au>
Cc:     davem@...emloft.net, maxime.ripard@...e-electrons.com,
        wens@...e.org, linux-kernel@...r.kernel.org,
        linux-crypto@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2] crypto: sun4i-ss: support the Security System PRNG

On Wed, Dec 14, 2016 at 01:05:51PM +0800, Herbert Xu wrote:
> On Tue, Dec 13, 2016 at 03:10:59PM +0100, Corentin Labbe wrote:
> >
> > I have found two solutions:
> 
> No we already have algif_rng so let's not confuse things even
> further by making hwrng take PRNGs.
> 

But algif_rng is not accessible from user space without any coding.
So no easy "random" data with some cat /dev/xxxx.

Clearly users of the 3 already intree hw_random PRNG will see that like a regresion.

Regards
Corentin Labbe