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https://issues.apache.org/jira/browse/TIKA-4168?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17784548#comment-17784548
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Tim Allison commented on TIKA-4168:
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This is what DSS looks for:
https://github.com/esig/dss/blob/master/dss-pades-pdfbox/src/main/java/eu/europa/esig/dss/pdf/pdfbox/PdfBoxDocumentReader.java#L431
An Adobe document on signatures that mentions UR3:
https://www.adobe.com/devnet-docs/acrobatetk/tools/DigSig/Acrobat_DigitalSignatures_in_PDF.pdf
An example file from our regression corpus with /Perms->UR3:
https://corpora.tika.apache.org/base/docs/commoncrawl3/FF/FFAHFT2XQ3BSGJ2BF3NMF7P7BTZEIRQK
I just attached two screenshots of PDFBox's debugger's views of some of the
annot flags on another file. This shows how we can get some permissions on
individual form fields?
> Extract LiveCycle Usage Rights from PDFs
> ----------------------------------------
>
> Key: TIKA-4168
> URL: https://issues.apache.org/jira/browse/TIKA-4168
> Project: Tika
> Issue Type: Task
> Reporter: Tim Allison
> Priority: Minor
> Attachments: Screenshot from 2023-11-07 11-43-09.png, Screenshot from
> 2023-11-07 11-44-36.png
>
>
> In a DM, [Philippe Lagadec|https://www.decalage.info/] asked me if we had or
> could find any files with Adobe LiveCycle usage rights:
> https://help.adobe.com/en_US/livecycle/11.0/Services/WS92d06802c76abadb-6ec569c512dbeb3d9d6-7ffd.2.html
> I did some digging, and I _think_ we can easily look for values (UR3) in the
> /Perms dictionary. Again, I _think_ this would tell us that there's a
> signature for LiveCycle Usage rights in the file, certainly not with the
> specificity of "import/export form data" vs "2d barcode scanning".
> I'm opening this ticket to ask for help in figuring out what we can extract
> along these lines.
> I think this info would be important for forensics and digipres folks.
> What do you think?
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