https://bugs.kde.org/show_bug.cgi?id=461371
Bug ID: 461371
Summary: PDFs digitally signed with Okular become locked in
Adobe Acrobat so no one else can sign it
Classification: Applications
Product: okular
Version: 21.08.3
Platform: Manjaro
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: PDF backend
Assignee: okular-de...@kde.org
Reporter: cengi...@users.sf.net
Target Milestone: ---
SUMMARY
Once opened in Acrobat Reader or DC, it may allow you to make modifications,
but when you try to save the PDF again, it gives this vague error: "The
document could not be saved. There was a problem reading this document (105)."
It is important to have Okular interoperable with other tools, so that it can
be more widely used.
The digital signature feature works well and it was a feature I have been
waiting for a long time, but I hope this issue can be fixed. I would not be
able to share signed documents with my colleagues who use non-open source
tools.
Theoretically, PDFs can be locked or left open after being digitally signed,
but even Adobe does not give you an option to lock a document. It is also not
clear if the locking is the issue here, or there is another problem with the
generated file.
STEPS TO REPRODUCE
1. Open a PDF file in Okular
2. Digitally sign it and save as a new PDF
3. Open the new PDF in Acrobat Reader or DC, try to sign or save
OBSERVED RESULT
Getting the above error.
EXPECTED RESULT
For forms that need to be signed by multiple people, I would expect to be able
to add another signature in Adobe products.
SOFTWARE/OS VERSIONS
Windows: 10/Acrobat DC (new install)
Linux/KDE Plasma:
(available in About System)
KDE Plasma Version: 5.23.3
KDE Frameworks Version: 5.88.0
Qt Version: 5.15.2
ADDITIONAL INFORMATION
I can provide example files if needed.
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