On Mon, Mar 20, 2017 at 09:28:58PM +0800, Herbert Xu wrote: > On Mon, Mar 20, 2017 at 12:19:32PM +0530, PrasannaKumar Muralidharan wrote: > > > > AF_ALG interface for rng does have seeding support. I think hw_random > > does not provide seeding support intentionally as I understand that > > True RNG need not require seeding (please correct me if I am wrong). > > Yes. We should be converting PRNGs in hwrng over to algif_rng. The actual hardware block can be seeded from true RNG (taking data from thermal noise) so the solutions (if I understand correctly) for exynos-rng might be: 1. Seed from internal TRNG making it a proper hwrandom device, 2. Convert to AF_ALG and seed with data from user-space through that interface. Thanks for explanation, I'll queue it to my tasks list. Best regards, Krzysztof
