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

On Thu, Dec 08, 2016 at 05:06:18PM +0800, Herbert Xu wrote:

On Wed, Dec 07, 2016 at 01:51:27PM +0100, Corentin Labbe wrote:

quoted

So I must expose it as a crypto_rng ?

If it is to be exposed at all then algif_rng would be the best
place.

I have badly said my question.
So I need to use the HW PRNG in a crypto_rng "provider" that could be thereafter used from user space via algif_rng. right ?

quoted

Could you explain why PRNG must not be used as hw_random ?

The hwrng interface was always meant to be an interface for real
hardware random number generators.  People rely on that so we
should not provide bogus entropy sources through this interface.

Why not adding a KCONFIG HW_RANDOM_ACCEPT_ALSO_PRNG with big warning ?
Or a HW_PRNG Kconfig which do the same than hwrandom with /dev/prng ?
With that it will be much easier to convert in-tree PRNG that you want to remove.

Regards
Corentin Labbe