Re: Could this be applied to random(4)?

Am Freitag, 27. Mai 2016, 16:09:53 schrieb Sandy Harris:

Hi Sandy,

On Fri, May 27, 2016 at 2:30 PM, Stephan Mueller [off-list ref] 

wrote:

quoted

This document describes extractors. Those extractors are intended to
combine *independent* sources with weak entropy.

None of our sources we have in add_*_randomness are independent.

No, but it would be easy to get two independent sources, interrupts
and some sort of timer jitter thing as in my maxwell, your jitter
driver, havege, ...

I think I would concur with you here. From my LRNG code:

static int lrng_pdrbg_seed_internal(u8 *outbuf, u32 outbuflen, bool 
fullentropy,
                                    bool drain)
{
...
        /*
         * Concatenate the output of the noise sources. This would be the
         * spot to add an entropy extractor logic if desired.
...

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Ciao
Stephan