[Poppler-bugs] [Bug 99416] Sign PDF with digital signature

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99416

--- Comment #49 from Adrian Johnson <ajohnson at redneon.com> ---
(In reply to Hans-Ulrich Jüttner from comment #48)
> I think that re-reading a document which just has been written with poppler
> and writing it again whithout changes should produce an identical document.

Should does not mean it always will. It introduces a constraint on poppler that
prevents any future changes that alter that assumption.

I still have not seen a good explanation for why the you think the signing
should work this way.

> But with the multiple spaces in the ByteRange on disk this would not be the
> case. Moreover, multiple spaces separating objects in PFD files are not
> allowed by more restrictive standards like PDF/A.

Then we can use '0's. But in any case we don't support PDF/A.

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