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

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Message-ID: <20161215060904.GB13152@gondor.apana.org.au>
Date:   Thu, 15 Dec 2016 14:09:04 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     PrasannaKumar Muralidharan <prasannatsmkumar@...il.com>
Cc:     Corentin Labbe <clabbe.montjoie@...il.com>, davem@...emloft.net,
        maxime.ripard@...e-electrons.com, Chen-Yu Tsai <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 Thu, Dec 15, 2016 at 12:47:16AM +0530, PrasannaKumar Muralidharan wrote:
> Should there be a mandate that driver will be accepted only when it
> passes 'rngtest'. This will make sure that prng drivers won't get
> added in future.

You cannot use software to distinguish between a PRNG and an HRNG.
We can only rely on the veracity of the documentation.

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