Re: [libreoffice-users] Problems when digitally signing PDF exports of *.odt documents containing text boxes

Hi,

3)  Export the document to pdf (PDF /A ?)
     3.1 Sign the pdf in Pades mode?
is corretc?

Have you tried to verify sign with another app? (as Dike, File 
Protector, Adobe Reader)


Il 19/05/2022 21:44, Norbert Berzen ha scritto:
> Hello Natale,
>
> first of all, thank you very much for your quick reply. Perhaps I did 
> not explain the problem well enough. I did not modify a digitally 
> signed pdf.
> In short, the problem is any writer document containing at least one 
> text box cannot be properly exported to pdf with a digital signature.
>
> The easiest way to reproduce (with the mentioned Version/Build on 
> debian 10) is as follows.
>
> 1) Open libreoffice writer
>
> 2) Insert a text box into the blank sheet containing the text "This is 
> a text box"
>
> 3) Export the document to pdf with digital signature
>
> 4) Open the pdf with libreoffice draw
>
> => Look at libreoffice draw's notice about the signature
>
>
> Greetings,
> --
> Norbert Berzen <norbert@berzen.eu>
>
> -----Original Message-----
> *From*: Natale Tarantino <tarantinonatale@gmail.com 
> <mailto:Natale%20Tarantino%20%3ctarantinonatale@gmail.com%3e>>
> *To*: norbert@berzen.eu
> *Cc*: users@global.libreoffice.org
> *Subject*: Re: [libreoffice-users] Problems when digitally signing PDF 
> exports of *.odt documents containing text boxes
> *Date*: Thu, 19 May 2022 18:39:56 +0200
>
> If you modify a digitally signed pdf this is the correct behavior.
>
>
> Il Gio 19 Mag 2022, 17:56 Norbert Berzen <norbert@berzen.eu> ha scritto:
> > Hallo together,
> >
> > I'm using LibreOffice Version: 7.2.7.2
> > Build: 8d71d29d553c0f7dcbfa38fbfda25ee34cce99a2
> > on Debian 10 (Buster).
> >
> > Before filing an official bug report I would like to know if some of
> > you does experience a similar problem.
> >
> > My problem is as follows:
> >
> > When exporting some simple *.odt document from writer to PDF via
> > "File->Export As->Export as PDF...", the Dialog "PDF Options" pops up.
> > In "Digital Signatures" tab I can digitally sign the PDF with my X.509
> > certificate. All is fine so far. The PDF gets properly digitally signed
> > and I can check this by opening the PDF with "Libre Office Draw".
> >
> > But when a text box gets added to the document I can export to PDF as
> > well. Opening the PDF by "Libre Office Draw" now gives the 
> > followingmessage: "At least one signature has problems: the document 
> > is only partially signed."
> >
> > Does any of you experience similar problems when exporting documents
> > containing text boxes or can someone proove my problem?
> >
> >
> > Many thanks in advance
> > --
> > Norbert Berzen <norbert@berzen.eu>

--
To unsubscribe e-mail to: users+unsubscribe@global.libreoffice.org
Problems? https://www.libreoffice.org/get-help/mailing-lists/how-to-unsubscribe/
Posting guidelines + more: https://wiki.documentfoundation.org/Netiquette
List archive: https://listarchives.libreoffice.org/global/users/
Privacy Policy: https://www.documentfoundation.org/privacy