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Re: DakaRand
From: Dan Kaminsky <dan () doxpara com>
Date: Mon, 20 Aug 2012 09:35:54 -0700

On Mon, Aug 20, 2012 at 9:29 AM, Paul Schmehl <pschmehl_lists () tx rr com>wrote:

--On August 20, 2012 8:32:59 AM -0700 Dan Kaminsky <dan () doxpara com>
wrote:




On Mon, Aug 20, 2012 at 8:29 AM, Paul Schmehl <pschmehl_lists () tx rr com>
wrote:


--On August 20, 2012 2:22:28 AM -0700 Dan Kaminsky <dan () doxpara com>
wrote:


May I ask what FreeBSD's entropy sources are?


I'm surprised you don't already know.  From device noise.




Which class?  There are many sorts of said noise (most of which I
believe actually work).


The long answer is look at /usr/src/sys/sys/random.h.

The short answer is:
/* Allow the sysadmin to select the broad category of
* entropy types to harvest
*/
struct harvest_select {
        int ethernet;
        int point_to_point;
        int interrupt;
        int swi;
};

swi is software interrupt handlers.  interrupt is hardware interrupts
(e.g. usb, pci, etc.)


Neat.  What's the default, and what does it mine?  Count?  Nanosecond time?



*If* you install a hardware PRNG, FreeBSD will use that instead (by
default).


Excellent.



--
Paul Schmehl, Senior Infosec Analyst
As if it wasn't already obvious, my opinions
are my own and not those of my employer.
*********************************************
"It is as useless to argue with those who have
renounced the use of reason as to administer
medication to the dead." Thomas Jefferson
"There are some ideas so wrong that only a very
intelligent person could believe in them." George Orwell


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