Openwall GNU/*/Linux - a small security-enhanced Linux distro for servers
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Date: Fri, 07 Apr 2017 13:50:40 -0400
From: fche@...hat.com (Frank Ch. Eigler)
To: oss-security@...ts.openwall.com
Subject: Re: libxslt math.random issue


Florian Weimer wrote:

> FWIW, why is glibc not doing srand(RANDOMVECTOR) during startup... :/
>
> The C standard does not allow it.
>
> ”
> If rand is called before any calls to srand have been made, the same
> sequence shall be generated as when srand is first called with a seed
> value of 1.
> ”

Yes, but that does not imply that srand(1) needs to resolve to a
build-constant value.  https://gitlab.com/fche/randomer salts it with a
snippet from /dev/urandom, and stays POSIX-compatible & restartable.

- FChE

Powered by blists - more mailing lists

Your e-mail address:

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.