lkml.org 
[lkml]   [2021]   [Dec]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH v43 01/15] Linux Random Number Generator
Greg Kroah-Hartman <gregkh@linuxfoundation.org> wrote:

> Also, why does any of this have to be in the kernel at all?

The kernel has had random(4) since Ted invented it sometime in
the 90s. There's no question it's a good idea; that's why all the BSDs
& some others have copied it. The only questions here are whether
it could be made FIPS compliant & whether it should be.

> If FIPS requires a deterministic random number generator
> that will not allow entropy to be acquired from hardware
> or external inputs,

It doesn't require that at all; in fact their DRNG design
requires an external source of random bits. However, it
requires that the source be certified & that would be a
problem for us. Intel & others might be able to get their
random number instructions certified and vendors of
crypto or SOC chips might get theirs certified, but the
kernel community could not do that.

I think the kernel's entropy collection routines are good
enough that they could, in principle, be certified, but
that would involve some work & considerable money.

> why does the
> kernel care at all? Just write a fips_random.so library and get it
> certified and have any userspace code that cares about such a crazy
> thing to use that instead.

That does not solve the problem. The library would
also need a certified source of random inputs, so
to get it certified you'd have to get something else
certified first -- random(4), an instruction or a hardware
rng.

\
 
 \ /
  Last update: 2021-12-04 10:54    [W:0.076 / U:5.560 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site