Re: DakaRand

[Dan Kaminsky <dan () doxpara com>]

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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