Thread (27 messages) 27 messages, 8 authors, 2018-07-01

Re: [PATCH 3/3] hwrng: msm - Add support for prng v2

From: Stanimir Varbanov <hidden>
Date: 2018-06-22 15:33:48
Also in: linux-arm-msm, lkml

Hi,

On 06/22/2018 05:38 PM, Herbert Xu wrote:
On Fri, Jun 22, 2018 at 11:27:59AM +0300, Stanimir Varbanov wrote:
quoted
Hi Herbert,

On 06/21/2018 02:53 PM, Herbert Xu wrote:
quoted
On Thu, Jun 21, 2018 at 02:27:10PM +0300, Stanimir Varbanov wrote:
quoted
OK, I just wanted to say that it is _not_ PRNG and the register names
gives us wrong impression.
So does it generate one bit of output for each bit of hardware-
generated entropy like /dev/random? Or does it use a hardware-
generated seed to power a PRNG?
I believe it is the second one. Isn't the second one SP 800-90A?
In that case it should switch over to algif_rng.
OK, what about the rest drivers in drivers/char/hw_random? Are they all
true RNG?

-- 
regards,
Stan
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