Re: patch request for os.urandom()

Path	csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!news.mixmin.net!hq-usenetpeers!hq-usenetpeers.eweka.nl!xlned.com!feeder5.xlned.com!newsfeed.xs4all.nl!newsfeed3a.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail
Return-Path	<rosuav@gmail.com>
X-Original-To	python-list@python.org
Delivered-To	python-list@mail.python.org
X-Spam-Status	OK 0.025
X-Spam-Evidence	'H': 0.95; 'S': 0.00; '"this': 0.03; 'preferably': 0.05; 'paths': 0.07; 'subject:()': 0.09; 'cc:addr :python-list': 0.11; 'python': 0.11; 'exist.': 0.16; 'from:addr:rosuav': 0.16; 'from:name:chris angelico': 0.16; 'patches': 0.16; 'subject:patch': 0.16; 'two.': 0.16; 'wrote:': 0.18; 'subject:request': 0.19; 'seems': 0.21; 'cc:addr:python.org': 0.22; 'alternate': 0.24; 'decide': 0.24; 'guys': 0.24; 'paul': 0.24; '(or': 0.24; 'cc:2**0': 0.24; 'supported': 0.26; 'header:In-Reply-To:1': 0.27; 'am,': 0.29; 'patch': 0.29; 'words': 0.29; "doesn't": 0.30; 'message- id:@mail.gmail.com': 0.30; 'code': 0.31; 'this.': 0.32; 'probably': 0.32; 'run': 0.32; 'linux': 0.33; 'fri,': 0.33; 'guess': 0.33; 'trouble': 0.34; 'could': 0.34; 'something': 0.35; 'but': 0.35; 'received:google.com': 0.35; 'two': 0.37; 'implement': 0.38; 'does': 0.39; 'even': 0.60; 'new': 0.61; 'course': 0.61; "you're": 0.61; 'further': 0.61; 'url:17': 0.68; 'jul': 0.74; './configure': 0.84; 'python-dev': 0.84; 'url:2014': 0.84; 'yet?': 0.84; 'probe': 0.91; 'to:none': 0.92; 'reducing': 0.93
DKIM-Signature	v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:cc :content-type; bh=CMebIVus1TFecYng/F49ql+ycGfAywITqAqkkFmvtts=; b=ZH4ZqbgcNcBAg/s4mkBDrAlqpmUZpSBX+3FZWX2uzxKyc/WFugdpgF/Zmx9fK3AEPz grpr5xGWPN01y+WD7zKzQwPwBvUBSNAdCEmC/0EQ54fs3WoPyXm2wkpSrjbLk18IoAI5 K9yKPshk1w8fHPa886PAeTc/04ntbplWqr1tyd9vPmT4s3YOlkZ2t7vpOK28fJ0pwn/y Orb5Dp9JUCOdbp+FEY/l3MErDE/oERsnYSXRCsZ/cx6olk51I9AXK2kDiK537Q1aRD7k G+xoRZGeAa0JgTypDEpJuNQBBVccvApLZqesUMbdYqFqZt0HxI9+AWrVhTGK+qL6HovC inLw==
MIME-Version	1.0
X-Received	by 10.52.248.232 with SMTP id yp8mr12754376vdc.83.1405622683378; Thu, 17 Jul 2014 11:44:43 -0700 (PDT)
In-Reply-To	<7xlhrrkf6h.fsf@ruckus.brouhaha.com>
References	<7xlhrrkf6h.fsf@ruckus.brouhaha.com>
Date	Fri, 18 Jul 2014 04:44:43 +1000
Subject	Re: patch request for os.urandom()
From	Chris Angelico <rosuav@gmail.com>
Cc	"python-list@python.org" <python-list@python.org>
Content-Type	text/plain; charset=UTF-8
X-BeenThere	python-list@python.org
X-Mailman-Version	2.1.15
Precedence	list
List-Id	General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe	<https://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive	<http://mail.python.org/pipermail/python-list/>
List-Post	<mailto:python-list@python.org>
List-Help	<mailto:python-list-request@python.org?subject=help>
List-Subscribe	<https://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups	comp.lang.python
Message-ID	<mailman.11948.1405622692.18130.python-list@python.org> (permalink)
Lines	22
NNTP-Posting-Host	2001:888:2000:d::a6
X-Trace	1405622692 news.xs4all.nl 2927 [2001:888:2000:d::a6]:38390
X-Complaints-To	abuse@xs4all.nl
X-Received-Bytes	4469
X-Received-Body-CRC	3903117751
Xref	csiph.com comp.lang.python:74671

Show key headers only | View raw

On Fri, Jul 18, 2014 at 4:34 AM, Paul Rubin <no.email@nospam.invalid> wrote:
> Could os.urandom() be patched to use the new Linux getrandom() system
> call on systems where it is available?  Further info:
>
> http://lists.openwall.net/linux-kernel/2014/07/17/235

Uhm... does that even exist in kernel trunk yet? That's pretty
amazingly new. I would guess Python doesn't want to start using
something like that until it's *at least* appeared in a released
kernel; although of course you're welcome to run a patched Python on a
patched Linux to make use of this.

Trouble with that seems to be that it's reducing code paths from two
to... two. Instead of having a seldom-used code path for the fall-back
when there's no fd available, you instead have an alternate code path
for the fall-back when getrandom() doesn't exist. But if the Linux
guys decide to implement this, then you can take it to python-dev with
"This is supported by Linux 3.x.y" (or probably "Linux 3.x"), and
preferably a patch that includes something in ./configure to probe for
availability. Patches speak louder than words :)

ChrisA

Thread

patch request for os.urandom() Paul Rubin <no.email@nospam.invalid> - 2014-07-17 11:34 -0700
  Re: patch request for os.urandom() Chris Angelico <rosuav@gmail.com> - 2014-07-18 04:44 +1000
  Re: patch request for os.urandom() Ned Deily <nad@acm.org> - 2014-07-17 12:37 -0700
  Re: patch request for os.urandom() Sturla Molden <sturla.molden@gmail.com> - 2014-07-17 21:54 +0200
  Re: patch request for os.urandom() Christian Heimes <christian@python.org> - 2014-07-17 22:12 +0200

csiph-web