Re: DRAFT: eXIf 2017-03-09

Glenn Randers-Pehrson <[email protected]> Fri, 10 Mar 2017 11:37:56 -0500
Newsgroups gmane.comp.graphics.png.general
Message-ID <CA+PdXcuC8-n5Guihv59qxzGNgbffOx29jXd1AeFKwWGbb-fv3Q@mail.gmail.com>
That looks scary.  If that's our objective, then OK.
If our objective is to provide a simple method of preserving
the Exif profile existing in JPEG files, not so much.

Glenn

On Fri, Mar 10, 2017 at 10:48 AM, John Bowler
<[email protected]> wrote:
> You could simply replace (2) and (3) in the rationale with a statement
> to the effect that since the chunk format is entirely defined by the
> EXIF specification use of the chunk data, as opposed to just copying
> it, requires a good understanding of that specification and the
> underlying TIFF specifications.
>
> It might be helpful to add to the security considerations an
> observation that, "Libraries exist which handle errors and potential
> security issues within the data.  Such errors do exist in real camera
> data and therefore implementing EXIF handling code from scratch is a
> significant undertaking."
>
> John Bowler
>
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