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

[bugzilla-daemon at freedesktop.org]

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

--- Comment #1 from Hanno Meyer-Thurow <h.mth at web.de> ---
I got a response from Miklos Vajna. Below are the interesting parts:

On Mon, Jan 16, 2017 at 10:15:53AM +0100, Miklos Vajna
<vmiklos at collabora.co.uk> wrote:
> On Wed, Jan 11, 2017 at 08:42:41PM +0100, Hanno Meyer-Thurow
> <h.mth at web.de> wrote:
> > I think it would be great to enable the poppler library to sign PDF
> > files. Though, I wonder if it is possible to port the code from
> > LibreOffice to poppler wrt to licensing.
> 
> Should be OK, LibreOffice is MPL licensed (weak copyleft), while
> poppler is GPL (copyleft), so copying code from LO to poppler should
> be fine.
> 
> > A question: is it possible to sign single form fields with
> > LibreOffice or just a complete document?  
> 
> LO can only sign the whole document.


I read on Gentoo forums[0], that MuPDF with gostscript-gpl is able to sign PDF
files. One may have a look there, too.

[0] https://forums.gentoo.org/viewtopic-p-8017048.html#8017048

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