Bug 456430

Summary: Add PDF digital signatures
Product: [Applications] okular Reporter: owaschuwa
Component: PDF backendAssignee: Okular developers <okular-devel>
Status: RESOLVED NOT A BUG    
Severity: normal CC: aacid
Priority: NOR    
Version First Reported In: 20.12.3   
Target Milestone: ---   
Platform: Kubuntu   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description owaschuwa 2022-07-07 04:12:21 UTC 
SUMMARY
***
I am attempting to add PDF digital signatures by following https://rajeeshknambiar.wordpress.com/2022/06/27/digitally-signing-pdf-documents-in-linux-with-hardware-token-okular/ 
The digital signatures option is not available in PDF Backend Configuration, only "Enhance thin lines".
I have removed Okular using apt and reinstalled to Version 20.12.3 using snap.
I have also installed Poppler 21.09 by following https://askubuntu.com/questions/1240998/how-to-install-poppler-0-73-on-ubuntu-20-04-any-change-since-18-04
***


STEPS TO REPRODUCE
1. Install Okular 20.12.3 using 'sudo snap install okular'
2. Open Okular > Settings > Configure Backends
3. Select PDF Backend Configuration

OBSERVED RESULT
Only "Enhance thin lines" option is available.

EXPECTED RESULT
"Certificate database" option should also be showing, as in p. 35 of https://docs.kde.org/stable5/en/okular/okular/okular.pdf

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Linux (x86_64) release 5.13.0-52-generic
KDE Plasma Version: 5.18.8
KDE Frameworks Version: 5.68.0
Qt Version: 5.12.8

ADDITIONAL INFORMATION
I'm fairly new to Linux so I'm sure I've made a mistake somewhere! Any help is greatly appreciated, thanks.
Comment 1 Albert Astals Cid 2022-07-07 20:50:48 UTC 
> I'm fairly new to Linux so I'm sure I've made a mistake somewhere

You have, don't try to compile stuff if you don't know what you're doing.

My personal recommendation is that you use Okular from flathub if your distribution doesn't provide one recent enough.

https://flathub.org/apps/details/org.kde.okular
Comment 2 owaschuwa 2022-07-07 21:05:44 UTC 
Flathub, got it. Thanks very much for your help!