Re: [apps-discuss] Review of draft-ietf-appsawg-file-scheme

Julian Reschke <julian.reschke@gmx.de> Fri, 15 April 2016 07:17 UTC

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To: Matthew Kerwin <matthew@kerwin.net.au>, Graham Klyne <gk@ninebynine.org>
References: <570D4C99.1030405@dcrocker.net> <CACweHND-OX+5okkJ+oE=6UN84x+CFtPBpMnU8HqaPbgQgJ_oWA@mail.gmail.com> <570E2510.4040408@ninebynine.org> <CACweHNCLS+QU2QveqYjkuPnDybbm-dtX9qQPsO4tTkgUoc5QYg@mail.gmail.com>
From: Julian Reschke <julian.reschke@gmx.de>
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Date: Fri, 15 Apr 2016 09:16:14 +0200
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Cc: Apps Discuss <apps-discuss@ietf.org>, Dave Crocker <dcrocker@bbiw.net>, draft-ietf-appsawg-file-scheme@ietf.org
Subject: Re: [apps-discuss] Review of draft-ietf-appsawg-file-scheme
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On 2016-04-15 09:10, Matthew Kerwin wrote:
> On 13 April 2016 at 20:53, Graham Klyne <gk@ninebynine.org
> <mailto:gk@ninebynine.org>>wrote:
>
>     ​​
>
>     (Local interpretation may not be, but I'd suggest that's a local
>     implementation issue.  At most, make a note as a local handling
>     issue in the appendices? Hmmm... are there any security
>     considerations here that should be flagged - relating to possible
>     unexpected aliasing from case-only differences between files.)
>
>
> I think the talk about case-sensitivity is worthwhile keeping inline,
> even if it's touching on system-specific issues.
>
> Regarding security considerations, I've added some tentative hand-waving:
>
> ""
> Some file systems have case-sensitive file naming and some do not.
> Care must (?) be taken to avoid issues resulting from possibly
> unexpected aliasing from case-only differences between file paths or
> URIs.
> ""
>
> I'm open to suggestions for improvement (or deletion.)

case-insensitive (DOS?) < case-preserving (NTFS) < case-sensitive (others)

...so maybe mention all the three cases.

Best regards, Julian

PS: it might also be good to touch Unicode normalization forms...