https://bugs.documentfoundation.org/show_bug.cgi?id=150828

            Bug ID: 150828
           Summary: Place digital signatures in an existing PDF document
                    with a visible stamp (e.g. signature scan)
           Product: LibreOffice
           Version: unspecified
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: medium
         Component: Draw
          Assignee: [email protected]
          Reporter: [email protected]

Description:
When signing an existing PDF document with LibreOffice (Draw), the only option
without altering the document (and invalidating previous signatures) is to
"silently" sign the document or use the preconfigured "signature line" (the one
that Draw inserts): The signature will be digitally present & validated, but
there is no option to insert e.g. a signature scan or manually format the
preconfigured "stamp".

I am proposing a feature extension to Draw -> Insert -> Signature Line where a
pop-up dialogue appears similar to the same functionality in Writer, that
allows to manually edit some fields (e.g. clear text name / organisation),
select/unselect which fields to display (e.g. date) and to select an image to
place into the signature stamp.

It would be very similar to the existing feature of "Insert signature line" in
LO Writer, except that the latter feature is only properly working for .odt
documents, and not for existing PDFs. And the image can only be inserted with
the "sign" context menu of a previously inserted signature line.


Steps to Reproduce:
1. open Writer
2. choose "File -> Digital Signatures -> Sign Existing PDF"
3. Select an existing PDF
4. In Draw, choose "Insert -> Signature Line"
5. --> no pop-up for the signature field properties

Actual Results:
A document is created with a valid signature, but no image of a handwritten
signature

Expected Results:
A pop-up menu that allows to configure properties for the signature field (and
which ones to display), as well as selecting an image to use for the signature
stamp


Reproducible: Always


User Profile Reset: No



Additional Info:
N/A

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