SUMMARY Okular should have certificate chain validation. For each digital signature, there should be chain validation against system store. STEPS TO REPRODUCE 1. Open pdf which is digitally signed OBSERVED RESULT 1. Chain validation (e.g. cert -> intermediate -> root) is not performed in Okular. EXPECTED RESULT 1. Chain should be validated and expected result shown to the user SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: OpenSuse, Manjaro (available in About System) KDE Frameworks 5.64.0 Qt 5.13.1 (built against 5.13.1 ADDITIONAL INFORMATION
This is again a problem of missing features in poppler. poppler does not extract those certificates from the PDF file so we can't show the chain. Could you please open a bug in https://gitlab.freedesktop.org/poppler/poppler/issues ?
New issue created: https://gitlab.freedesktop.org/poppler/poppler/issues/896