On 22-06-18, 22:38, Herbert Xu wrote: > On Fri, Jun 22, 2018 at 11:27:59AM +0300, Stanimir Varbanov wrote: > > Hi Herbert, > > > > On 06/21/2018 02:53 PM, Herbert Xu wrote: > > > On Thu, Jun 21, 2018 at 02:27:10PM +0300, Stanimir Varbanov wrote: > > >> > > >> 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. Okay I am doing the port taking the exynos-rng as a ref. Question is how to test it, how is one supposed to exercise the rng, any test utils/apps for that? Sorry for noob question, new to crypto interfaces. -- ~Vinod
