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

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,

-----Original Message-----
From: Natale Tarantino <tarantinonatale@gmail.com>
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>
-- 
Norbert Berzen <norbert@berzen.eu>

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