Martin Klíma created PDFBOX-4393:
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Summary: PDF signature invalid after second interactive field
signed
Key: PDFBOX-4393
URL: https://issues.apache.org/jira/browse/PDFBOX-4393
Project: PDFBox
Issue Type: Bug
Affects Versions: 2.0.12
Environment: Windows
Reporter: Martin Klíma
Attachments: image-2018-12-04-11-14-01-586.png,
image-2018-12-04-11-14-32-676.png, streamserve_test_sig0.pdf,
streamserve_test_sig2.pdf, streamserve_test_sig3.pdf,
streamserve_test_sig3.signed.pdf
Hi guys,
I stumpted on the problem with PDFBox and interactive field signing. I have PDF
generated with OpenText StreamServe with two interactive fields for signing.
See example 1 (streamserve_test_sig0.pdg) in attachement.
When I use Adobe Reader I can sign both of the visual fields just fine but
when I use PDFBox to sign one of this field the following signature is marked
as invalid. Doesn't matter if I use PDFbox or sign it manually with Adobe
Reader See example 3:
* streamserve_test_sig3.pdf (signed by PDFBox) - valid
* streamserve_test_sig3.pdf (signed 2nd by Adobe Reader) - invalid
!image-2018-12-04-11-14-01-586.png!
Also last example - when it´s signed first by Adobe Reader and then with PDFBox
the signature seems valid but it says the document was "certified". See example
2 (streamserve_test_sig2.pdf)
!image-2018-12-04-11-14-32-676.png!
What could be wrong? When is signed whole document with PDFBox it works just
fine.
Thanks for response,
Martin
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