Re: GRUB2 on OpenBSD 5.3-amd64: linking problem

[Douglas Ray <dougray@cpan.org>]

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On 23/08/13 7:31 PM, Vladimir '?-coder/phcoder' Serbinenko wrote:
> On 23.08.2013 11:26, Ilya Bakulin wrote:
>> On Thursday 22 August 2013 20:16:48 Vladimir '?-coder/phcoder' Serbinenko
>> wrote:
>>> On 21.08.2013 21:06, Vladimir '?-coder/phcoder' Serbinenko wrote:
>>>> Based on your work, current WIP patch. I've committed some parts of your
>>>> patch as well as my own fixes. Remainder is attached
>>>> Current problems:
>>>> -double/float is mostly a kludge
>>>> -build-grub-mkfont
>>>> -nm on OpenBSD doesn't accept same options as GNU one.
>>> Only the first problem still remains.
>> I have just tested the compilation of the latest revision (5148) and confirm
>> that it compiles OK!
>> There is a warning about random generator not being secure in
>> util/grub-mkpasswd-pbkdf2.c, which may be supressed by adding "&& ! defined
>> (__OpenBSD__)" to the defines list.
> To do this we need a confirmation that reading from /dev/urandom is
> indeed the right way to access PRNG on OpenBSD and that it gives us
> cryptographically good random.
>
What would you consider adequate confirmation?

I understand there was a problem with random and urandom in
OpenBSD up to 4.9, though arandom was good.

calomel.org asserts that, as of OpenBSD 5.1, all their random devices
use the arc4 library;  /dev/urandom now gives as good as /dev/arandom.

The following 'ent' analysis is presented for /dev/arandom:
-----------------------------------------------------

user@machine:  ./ent output
Entropy = 7.999956 bits per byte.

Optimum compression would reduce the size
of this 419430400 byte file by 0 percent.

Chi square distribution for 419430400 samples is 257.21, and randomly
would exceed this value 44.95 percent of the times.

Arithmetic mean value of data bytes is 127.5178 (127.5 = random).
Monte Carlo value for Pi is 3.144255776 (error 0.08 percent).
Serial correlation coefficient is -0.000120 (totally uncorrelated = 0.0).

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