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From: Vagrant Cascadian <vagrant@reproducible-builds.org>
To: Arun Isaac <arunisaac@systemreboot.net>, Guix Devel <guix-devel@gnu.org>
Subject: Re: maradns reproducibility fixes and the merits of picking a random number
Date: Wed, 08 Jun 2022 13:25:20 -0700	[thread overview]
Message-ID: <87czfigaxb.fsf@contorta> (raw)
In-Reply-To: <87sfofkl8o.fsf@systemreboot.net>

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On 2022-06-09, Arun Isaac wrote:
> Hi Vagrant,
>
>> But there's one nervous-making issue this revealed; maradns embeds a
>> random number at build time ... allegedly for systems that don't have
>> /dev/urandom... see
>> maradns-3.5.0020/deadwood-3.5.0020/src/Makefile.ubuntu2004:
>>
>>   # Since some systems may not have /dev/urandom (Windows, *cough* *cough*), we
>>   # keep a randomly generated prime around
>>
>> So it's got some code to generate a random number at build time and
>> embed it in the binary. Now, if there's anything I know about good
>> practices about random numbers, this sort of thing is generally a very
>> large red flag! It also makes the package build differently every
>> time!
>
> Wow, great find! Has this issue been reported to maradns upstream? If
> upstream fixes it or provides us a compile flag to disable this
> "feature", it would be even better in the long run.

That does sound like the best long-term approach, definitely!

Will take the issue upstream...


live well,
  vagrant

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  reply	other threads:[~2022-06-08 20:27 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-07  1:49 maradns reproducibility fixes and the merits of picking a random number Vagrant Cascadian
2022-06-07  3:24 ` Felix Lechner
2022-06-07  5:20   ` Julien Lepiller
2022-06-07 12:11     ` Brian Cully via Development of GNU Guix and the GNU System distribution.
2022-06-08 11:48       ` Efraim Flashner
2022-06-08 14:09         ` Tobias Geerinckx-Rice
2022-06-08 11:47     ` Efraim Flashner
2022-06-08 20:33       ` Vagrant Cascadian
2022-06-23  2:05         ` Vagrant Cascadian
2022-06-28  1:31           ` Vagrant Cascadian
2022-06-28  9:30             ` Efraim Flashner
2022-06-28 15:39               ` Jack Hill
2022-06-28 16:04               ` Tobias Geerinckx-Rice
2022-06-28 16:18                 ` Gábor Boskovits
2022-06-28 16:33                   ` Vagrant Cascadian
2022-06-28 19:06                     ` Tobias Geerinckx-Rice
2022-06-28 19:15                       ` Tobias Geerinckx-Rice
2022-07-12  2:36                       ` Vagrant Cascadian
2022-07-12  2:41                         ` Vagrant Cascadian
2022-07-18 11:21                           ` Ludovic Courtès
2022-07-19 13:09                             ` Tobias Geerinckx-Rice
2022-06-07 15:15 ` Ludovic Courtès
2022-06-08 19:28 ` Arun Isaac
2022-06-08 20:25   ` Vagrant Cascadian [this message]
2022-06-14 17:16     ` Philip McGrath
2022-06-08 19:43 ` Liliana Marie Prikler
2022-06-08 20:23   ` Vagrant Cascadian

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