I have asked the following question on https://ask.libreoffice.org/en/question/183723/signature-isnt-selected-when-trying-to-sign-during-export-of-pdf-file-in-writer/ but nobody answered:
I have an Enigmail PGP signature that I use in Thunderbird under Ubuntu Linux. In Libre Office I can use it to sign (and encrypt) an ODT-document. But when I try to use it during export of a document as a PDF document something goes wrong. In the 'PDF Options' window on the 'Digital Signature' tab, I click on the 'Select' button and get the 'Select Certificate' window. My signature is already selected (it's the only one present). I now click on 'Sign'. The window closes, but the signature isn't shown in the field called "Use this certificate to digitally sign PDF documents:". So when I press the 'Export' button, I get a "signature generation failed" error message, and export of the PDF file fails.
Can anyone help me please?
I also tried signing an existing PDF-file, following the instructions on: https://vmiklos.hu/blog/pdf-sign.html - In other words:
- Open LibreOffice Draw
- File-menu -> Digital Signatures -> Sign existing PDF.
- Select/open document.
- Press 'Sign Document' button. But here, my signature isn't shown, so I can't select it and sign with it...
Best regards, Henrik