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    <body><span class="vcard"><a class="email" href="mailto:ioannis.herbert.papadopoulos@gmail.com" title="ioannis.herbert.papadopoulos@gmail.com">ioannis.herbert.papadopoulos@gmail.com</a>
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          <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Cannot sign existing PDF"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=130354">bug 130354</a>
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            <th>What</th>
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            <th>Added</th>
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           <td style="text-align:right;">CC</td>
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           <td>ioannis.herbert.papadopoulos@gmail.com
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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Cannot sign existing PDF"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=130354#c7">Comment # 7</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Cannot sign existing PDF"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=130354">bug 130354</a>
              from <span class="vcard"><a class="email" href="mailto:ioannis.herbert.papadopoulos@gmail.com" title="ioannis.herbert.papadopoulos@gmail.com">ioannis.herbert.papadopoulos@gmail.com</a>
</span></b>
        <pre>Created <span class=""><a href="http://bugs.documentfoundation.org/attachment.cgi?id=161038" name="attach_161038" title="libreoffice draw screenshot with the error I get">attachment 161038</a> <a href="http://bugs.documentfoundation.org/attachment.cgi?id=161038&action=edit" title="libreoffice draw screenshot with the error I get">[details]</a></span>
libreoffice draw screenshot with the error I get

I am also affected by the bug.

I cannot sign an existing PDF.

Furthermore, I cannot view existing digital signatures, although LO Draw
reports:
"This document is digitally signed and the signature is valid".

In the attached PNG, you can see the error I get
when I click on "Show Signatures".

Regards,
Yannis


For me, "lsb_release -a" gives
LSB Version:    core-11.1.0ubuntu2-noarch:security-11.1.0ubuntu2-noarch
Distributor ID: Ubuntu
Description:    Ubuntu 20.04 LTS
Release:        20.04
Codename:       focal

and "dpkg -l | grep '^ii *libreoffice'" gives
libreoffice-base 1:6.4.3-0ubuntu0.20.04.1
libreoffice-base-core 1:6.4.3-0ubuntu0.20.04.1
libreoffice-base-drivers 1:6.4.3-0ubuntu0.20.04.1
libreoffice-calc 1:6.4.3-0ubuntu0.20.04.1
libreoffice-common 1:6.4.3-0ubuntu0.20.04.1
libreoffice-core 1:6.4.3-0ubuntu0.20.04.1
libreoffice-draw 1:6.4.3-0ubuntu0.20.04.1
libreoffice-emailmerge 1:5.0.3~rc2-0ubuntu1~trusty2
libreoffice-gnome 1:6.4.3-0ubuntu0.20.04.1
libreoffice-gtk2 1:6.4.3-0ubuntu0.20.04.1
libreoffice-gtk3 1:6.4.3-0ubuntu0.20.04.1
libreoffice-help-common 1:6.4.3-0ubuntu0.20.04.1
libreoffice-help-en-gb 1:6.4.3-0ubuntu0.20.04.1
libreoffice-help-en-us 1:6.4.3-0ubuntu0.20.04.1
libreoffice-impress 1:6.4.3-0ubuntu0.20.04.1
libreoffice-java-common 1:6.4.3-0ubuntu0.20.04.1
libreoffice-l10n-en-gb 1:6.4.3-0ubuntu0.20.04.1
libreoffice-l10n-en-za 1:6.4.3-0ubuntu0.20.04.1
libreoffice-math 1:6.4.3-0ubuntu0.20.04.1
libreoffice-ogltrans 1:6.4.3-0ubuntu0.20.04.1
libreoffice-pdfimport 1:6.4.3-0ubuntu0.20.04.1
libreoffice-presentation-minimizer 1:5.0.3~rc2-0ubuntu1~trusty2
libreoffice-presenter-console 1:5.0.3~rc2-0ubuntu1~trusty2
libreoffice-sdbc-firebird 1:6.4.3-0ubuntu0.20.04.1
libreoffice-style-breeze 1:6.4.3-0ubuntu0.20.04.1
libreoffice-style-colibre 1:6.4.3-0ubuntu0.20.04.1
libreoffice-style-elementary 1:6.4.3-0ubuntu0.20.04.1
libreoffice-style-tango 1:6.4.3-0ubuntu0.20.04.1
libreoffice-writer 1:6.4.3-0ubuntu0.20.04.1</pre>
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