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From "Tilman Hausherr (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PDFBOX-4393) PDF signature invalid after second interactive field signed
Date Wed, 12 Dec 2018 09:11:00 GMT

    [ https://issues.apache.org/jira/browse/PDFBOX-4393?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16718656#comment-16718656
] 

Tilman Hausherr commented on PDFBOX-4393:
-----------------------------------------

Thanks… but I have an excellent espresso machine at home :-) If you want, you can support
the Apache Aoundation:

> 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
>          Components: Signing
>    Affects Versions: 2.0.12, 2.0.13
>         Environment: Windows
>            Reporter: Martin Klíma
>            Priority: Major
>             Fix For: 2.0.14, 3.0.0 PDFBox
>
>         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_sig0_saved.pdf, streamserve_test_sig0_saved_signed
by PDFBox.pdf, streamserve_test_sig0_saved_signed by PDFBox_then_signed by AR.pdf, streamserve_test_sig0_signed
by PDFBoxNEW.pdf, streamserve_test_sig0_signed by PDFBoxNEW_signed by AR.pdf, streamserve_test_sig2.pdf,
streamserve_test_sig3.pdf, streamserve_test_sig3.signed.pdf
>
>
> Hi guys,
> I stumped 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.pdf)
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.signed.pdf (signed 2nd by Adobe Reader) - invalid
> !image-2018-12-04-11-14-01-586.png|width=582,height=269!
>  
> 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|width=591,height=283!
>  
> What could be wrong? When is signed whole document with PDFBox it works just fine.
> Thanks for response,
> Martin
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