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From "Frank Cornelis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PDFBOX-3114) Visible signatures in different pages changes previous revision
Date Mon, 14 Dec 2015 17:30:46 GMT

    [ https://issues.apache.org/jira/browse/PDFBOX-3114?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15056328#comment-15056328

Frank Cornelis commented on PDFBOX-3114:

That would be great. We already have an N2 layer patch for visible signatures (so you can
put text on top of the N0 background image) against 1.8 (though this needs some cleanup).
The idea is to port it to 2.0 and open source the patch towards PDFBox (if we find ourselves
some time, the usual problem).

> Visible signatures in different pages changes previous revision
> ---------------------------------------------------------------
>                 Key: PDFBOX-3114
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-3114
>             Project: PDFBox
>          Issue Type: Bug
>          Components: Signing
>    Affects Versions: 2.0.0
>         Environment: Compiled with jdk1.8.0_60, tested with Adobe Acrobat XI Pro v.11.0.13
>            Reporter: Luca Battistelli
>            Assignee: Tilman Hausherr
>            Priority: Blocker
>             Fix For: 2.0.0
>         Attachments: PDFBOX-3114-screenshot.png, pdfbox-2.0.0-RC1_issue.zip, test1_invisiblysigned_COSWriterModified_p1p2_ERR.pdf,
test1_invisiblysignednoannotations_p1p2.pdf, test1_p1p2_visualsigned_COSWriterCOSArrayModified_OK.pdf,
test1_signedinvisible_p2.pdf, test_Acrobat_iText.zip
> I tried to make two visible signatures in a 2-pages pdf file using pdfbox-2.0.0-RC1.
> I followed the example in SVN directory
> https://svn.apache.org/viewvc/pdfbox/trunk/examples/src/main/java/org/apache/pdfbox/examples/signature/
> I have just modified CreateVisibleSignature class customizing the input parameters and
the page to sign.
> If both the signatures are made in the same page, no error occurs. If signatures are
made in different pages (e.g. signature 1 in page 1 and signature 2 in page 2), when I open
the pdf file with Adobe Acrobat XI Pro (v.11.0.13) it tells that signature 1 is not valid.
> The attachment below refers to the source/resourse zip file. It contains:
> - test.docx: 2-pages test document generated with Microsoft Office Professional Plus
> - test1.pdf: pdf version that generates error (created with Word by selecting "Save as
Adobe PDF" option)
> - test1_*.pdf: signed pdf files with error
> - test2.pdf: pdf version that generates no error (created with Word by selecting "Save
as" option and then "*.PDF")
> - test2_*.pdf: signed pdf files with no error
> - CreateVisibleSignature.java: customized source code 
> - stamp.png: signature image
> - test.p12: key store (password 12345)

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