Re: FLOSS support for signed PDFs
On Mon, 01 Oct 2007 12:49:13 -0500
John Hasler <jhasler@debian.org> wrote:
> I wrote:
> > How are they doing this detection [of Acroread]?
>
> Celejar writes:
> > I don't know.
>
> I suggest you concentrate your efforts on finding out (and publish your
> results, of course). Once you can spoof their detection method you can get
> them to send you the files which you should be able to read despite the
> signature. Verifying the signature can come later.
I installed the linux tarball (as a non-priveleged user, and to a
non-standard location under $HOME, to minimize pollution), and dropped
the plugin (nppdf.so) into $HOME/.mozilla/plugins (I'm using IW), which
was enough for the website to accept my system as having Acrobat
installed. I assume it was the plugin that did it, since I doubt there
were any heuristics that could have found the files I installed under
$HOME/some_location.
Oddly enough, when I try to download PDFs from the institution's site,
the plugin doesn't pick them up, although IW recognizes them as "PDF
documents", and "about:plugins" shows Acrobat as being installed. [IW
only offers to open the PDFs with the default app (Evince) or to save
them to disk].
pdfinfo gives:
> Producer: iText by lowagie.com (r1.02b;p128)
> CreationDate: Tue Oct 2 11:39:33 2007
> ModDate: Tue Oct 2 11:39:33 2007
> Tagged: no
> Pages: 4
> Encrypted: no
> Page size: 612 x 792 pts (letter)
> File size: 774826 bytes
> Optimized: no
> PDF version: 1.4
I haven't yet tried to open a downloaded PDF in Acrobat since I'm
reluctant to agree to the EULA.
> John Hasler
Celejar
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