[jira] [Commented] (PDFBOX-3699) Regression on signature with certification flag.

["Tilman Hausherr (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PDFBOX-3699?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15876458#comment-15876458 ] 

Tilman Hausherr commented on PDFBOX-3699:
-----------------------------------------

Could you attach the result of signing original_file.pdf with another product where the result is ok? This may help finding what's wrong.

One problem is that the /Acroform/DR entry is modified. I made a comment about that in the past but can't find it. I remove that part in the code but there is another problem which I haven't found yet.

> Regression on signature with certification flag.
> ------------------------------------------------
>
>                 Key: PDFBOX-3699
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-3699
>             Project: PDFBox
>          Issue Type: Bug
>          Components: Signing
>    Affects Versions: 2.0.2, 2.0.3, 2.0.4
>            Reporter: Marco Monacelli
>            Priority: Blocker
>         Attachments: original_file.pdf, signed_2.0.0_ok_previus_signature_but_invisible.pdf, signed_2.0.4_previus_signature_ko_but_signature_visible.pdf
>
>
> Hello,
> I got some problems signing a certified pdf with a signature with apparence: after the signature is applied the previous certification is reported as corrupted by Acrobat Reader. If I apply an invisible signature the issue doesn't happen.
> I have done a regression analysis using the same code
> - with pdfbox 2.0.0 and 2.0.1, the signature is not shown on the document but the certification is still valid
> - with earlier versions, the signature is shown on the document but the certification is broken
> The sample certified pdf (original_file.pdf) is in attachment.
> Finally this problem could be related to these tickets:
> 1- https://issues.apache.org/jira/browse/PDFBOX-2816 (PDFBox makes disallowed changes when signing a signed document)
> 2- https://issues.apache.org/jira/browse/PDFBOX-45 (Support incremental save)
> I tested my code with the test case file in 1 (acrosigned.pdf), and it works well.



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