[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index] [Thread Index]

Re: FLOSS support for signed PDFs

On Tue, Oct 02, 2007 at 12:45:58PM -0400, Celejar wrote:
> 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

they're not encrypted, so can you open them with evince/xpdf?  I'm not
sure what the problem is, I thought you were just trying to cross the
hurdle of getting them to allow d/l. Or do you need to confirm the


Attachment: signature.asc
Description: Digital signature

Reply to: