[okular] [Bug 415199] New: Okular doesn't show digital signatures without visible component

[Nemanja Hirsl]

https://bugs.kde.org/show_bug.cgi?id=415199

            Bug ID: 415199
           Summary: Okular doesn't show digital signatures without visible
                    component
           Product: okular
           Version: 1.9.0
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: okular-devel at kde.org
          Reporter: nemhirsl at gmail.com
  Target Milestone: ---

Created attachment 124504
  --> https://bugs.kde.org/attachment.cgi?id=124504&action=edit
test file 1

SUMMARY
Okular doesn't recognize digital signatures without visible component (visible
signature)
It is possible to sign PDF without visible signature and Okular can't handle
that properly
STEPS TO REPRODUCE
1. Open digitally signed PDF (make sure there are signatures w/o visible
component)

OBSERVED RESULT
1. If there's at least one digital signature with visible component Okular will
show it and will omit all others
2. If none of digital signatures has visible component Okular won't show
notification that PDF is signed


EXPECTED RESULT
1. All digital signatures regardless of visible component should be recognized
by Okular

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma:  OpenSuse (Tumbleweed), Manjaro
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: Qt 5.13.1

ADDITIONAL INFORMATION
Two attached documents:
1. Contract.pdf - 3 digital signatures, none of them with visible component
2. The Scrum Guide - 3 digital signatures, 2 with visible component

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