Re: [http-auth] Normalization forms in draft-ietf-httpauth-basicauth-enc

Julian Reschke <julian.reschke@gmx.de> Tue, 02 July 2013 08:37 UTC

Return-Path: <julian.reschke@gmx.de>
X-Original-To: http-auth@ietfa.amsl.com
Delivered-To: http-auth@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id E8A4E11E8433 for <http-auth@ietfa.amsl.com>; Tue, 2 Jul 2013 01:37:59 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -105.08
X-Spam-Level:
X-Spam-Status: No, score=-105.08 tagged_above=-999 required=5 tests=[AWL=-2.481, BAYES_00=-2.599, USER_IN_WHITELIST=-100]
Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id DGUr1YeGFY8N for <http-auth@ietfa.amsl.com>; Tue, 2 Jul 2013 01:37:55 -0700 (PDT)
Received: from mout.gmx.net (mout.gmx.net [212.227.17.22]) by ietfa.amsl.com (Postfix) with ESMTP id 7D28711E8417 for <http-auth@ietf.org>; Tue, 2 Jul 2013 01:37:53 -0700 (PDT)
Received: from mailout-de.gmx.net ([10.1.76.32]) by mrigmx.server.lan (mrigmx002) with ESMTP (Nemesis) id 0LtC3J-1UDq5j2PyF-012pYZ for <http-auth@ietf.org>; Tue, 02 Jul 2013 10:37:52 +0200
Received: (qmail invoked by alias); 02 Jul 2013 08:37:52 -0000
Received: from p5DD9780B.dip0.t-ipconnect.de (EHLO [192.168.1.103]) [93.217.120.11] by mail.gmx.net (mp032) with SMTP; 02 Jul 2013 10:37:52 +0200
X-Authenticated: #1915285
X-Provags-ID: V01U2FsdGVkX1+HtzVzv3CHH5tHA8UhNxkZzVkPOTvjIcAm9pK/Y7 JcAnFyeEsT/i74
Message-ID: <51D2915E.1060607@gmx.de>
Date: Tue, 02 Jul 2013 10:37:50 +0200
From: Julian Reschke <julian.reschke@gmx.de>
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130620 Thunderbird/17.0.7
MIME-Version: 1.0
To: Yoav Nir <ynir@checkpoint.com>
References: <20130630142838.31885.15315.idtracker@ietfa.amsl.com> <51D04326.5060600@gmx.de> <DEA2EA74-7587-4CAA-9424-4478B136308E@vpnc.org> <51D09F98.2070508@gmail.com> <D434C8F9-D3DC-40EB-A25A-3A259C1A22E6@vpnc.org> <51D1175C.3020007@it.aoyama.ac.jp> <51D11AD4.5050705@gmx.de> <FD268C10-8429-4D09-9A19-6755B9B0DC13@vpnc.org> <42111C34-9B32-45B2-AC94-B18CE5CC081F@checkpoint.com>
In-Reply-To: <42111C34-9B32-45B2-AC94-B18CE5CC081F@checkpoint.com>
Content-Type: text/plain; charset="ISO-8859-1"; format="flowed"
Content-Transfer-Encoding: 7bit
X-Y-GMX-Trusted: 0
Cc: "http-auth@ietf.org" <http-auth@ietf.org>
Subject: Re: [http-auth] Normalization forms in draft-ietf-httpauth-basicauth-enc
X-BeenThere: http-auth@ietf.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: HTTP authentication methods <http-auth.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/http-auth>, <mailto:http-auth-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/http-auth>
List-Post: <mailto:http-auth@ietf.org>
List-Help: <mailto:http-auth-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/http-auth>, <mailto:http-auth-request@ietf.org?subject=subscribe>
X-List-Received-Date: Tue, 02 Jul 2013 08:38:00 -0000

On 2013-07-02 09:59, Yoav Nir wrote:
> Hi
>
> For those of us not so well versed in I18N issues, what do you mean by normalization?
>
> Is it just consolidating look-alike code points, like the multiple hyphens that exist in Unicode?
> Does it also involve removing Arabic and Hebrew points? (I think Paul raised this one)
> Does it involve removing diacritics?
> Does it involve splitting combined characters (like U+00E6 into 'a' and 'e')?
> Is there a standard we can point to and say "do this before comparing or hashing"?
>
> Thanks
>
> Yoav

Dunno what the others think, but I was focusing on NFC vs NFD 
(<http://en.wikipedia.org/wiki/Unicode_equivalence#Normal_forms>), with 
a preference to recommend NFC.

That being said, it might be interesting to test what those UAs that 
currently *do* use UTF-8 do.

Best regards, Julian