On Tue, Aug 09, 2016 at 02:04:44PM +, Jason Cooper wrote:
>
> iiuc, Ted, you're saying using the hw_random framework would be
> disasterous because despite most drivers having a default quality of 0,
> rngd assumes 1 bit of entropy for every bit read?
Sorry, what I was trying to say (but fail
On Tue, Aug 09, 2016 at 06:30:03AM +, Pan, Miaoqing wrote:
> Agree with Jason's point, also understand Stephan's concern. The
> date rate can be roughly estimated by 'cat /dev/random |rngtest -c
> 1000', the average speed is .294Kibits/s. I will sent the patch
> to disable ath9k RNG by def
Am Montag, 8. August 2016, 02:03:36 CEST schrieb Pan, Miaoqing:
Hi Miaoqing,
> The entropy was evaluated by crypto expert, the analysis report show the
> ADC with at least 10bits and up to 22 bits of min-entropy for a 32 bits
> value, we conservatively assume the min-entropy is 10 bits out of 32
The ATH9K driver implements an RNG which is completely bypassing the
standard Linux HW generator logic.
The RNG may or may not deliver entropy. Considering the conservative
approach in treating entropy with respect to non-auditable sources, this
patch changes the delivered entropy value to zero. T
Hi Jason, Stephan,
Agree with Jason's point, also understand Stephan's concern. The date rate
can be roughly estimated by 'cat /dev/random |rngtest -c 1000', the average
speed is .294Kibits/s. I will sent the patch to disable ath9k RNG by
default.
Thanks,
Miaoqing
-Original Messag
The entropy was evaluated by crypto expert, the analysis report show the ADC
with at least 10bits and up to 22 bits of min-entropy for a 32 bits value, we
conservatively assume the min-entropy is 10 bits out of 32 bits, so that's why
set entropy quality to 320/1024 = 10/32. Also we have expl
Hey Ted,
On Wed, Aug 10, 2016 at 07:44:25PM -0400, Theodore Ts'o wrote:
> On Tue, Aug 09, 2016 at 02:04:44PM +, Jason Cooper wrote:
> > iiuc, Ted, you're saying using the hw_random framework would be
> > disasterous because despite most drivers having a default quality of 0,
> > rngd assumes 1
Hi Ted,
On Tue, Aug 09, 2016 at 07:56:22AM -0400, Theodore Ts'o wrote:
> On Tue, Aug 09, 2016 at 06:30:03AM +, Pan, Miaoqing wrote:
> > Agree with Jason's point, also understand Stephan's concern. The
> > date rate can be roughly estimated by 'cat /dev/random |rngtest -c
> > 1000', the averag
Hi Stephan,
On Mon, Aug 08, 2016 at 05:29:30PM +, Jason Cooper wrote:
> On Mon, Aug 08, 2016 at 08:41:36AM +0200, Stephan Mueller wrote:
...
> > If you think that this patch is a challenge because your driver starts to
> > spin, please help and offer another solution.
>
> Well, I don't buy t
Hi Stephan, Miaoqing Pan,
On Mon, Aug 08, 2016 at 08:41:36AM +0200, Stephan Mueller wrote:
> Am Montag, 8. August 2016, 02:03:36 CEST schrieb Pan, Miaoqing:
> > The entropy was evaluated by crypto expert, the analysis report show the
> > ADC with at least 10bits and up to 22 bits of min-entropy f
"Pan, Miaoqing" writes:
> The entropy was evaluated by crypto expert, the analysis report show
> the ADC with at least 10bits and up to 22 bits of min-entropy for a 32
> bits value, we conservatively assume the min-entropy is 10 bits out of
> 32 bits, so that's why set entropy quality to 320/1024
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