I'd like to know if anybody can sign pdf documents using Okular in Debian as explained in the manual:
https://docs.kde.org/stable5/en/okular/okular/signatures.html I've never been able to do this, although I have a PKCS signing certificate available at $HOME/.pki/nssdb. In Okular, the menu entry "Digitally Sign" under the "Tools" menu is grayed out and the section "PDF Digital Signature Certificates" of the PDF backend configuration (https://docs.kde.org/stable5/en/okular/okular/config-pdf.html#config-pdf-digital-signatures) doesn't exist on my system. At the bottom of the page on the first link above there is a note that says: "This feature is available for PDF documents only. You need to install at least version 21.01 of Poppler to be able to add digital signatures to a document." I'm running Debian Testing and, until yesterday, the version of libpoppler installed on my system was 20.09. Thus, I figured pdf signing wasn't available on my system because I didn't have the required version of libpoppler. Last night an update came along which brought libpoppler from version 20.09 to version 22.02. However, nothing changed after the update: I'm still unable to sign pdfs. So, I wonder if anybody here is able to sign pdfs using Okular in Debian and, if so, what's required to get that working. Thanks a lot.
