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From "Tilman Hausherr (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (PDFBOX-3114) Visible signatures in different pages
Date Wed, 09 Dec 2015 09:58:11 GMT

    [ https://issues.apache.org/jira/browse/PDFBOX-3114?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15045320#comment-15045320
] 

Tilman Hausherr edited comment on PDFBOX-3114 at 12/9/15 9:57 AM:
------------------------------------------------------------------

All I could find out till now, that it happens  (that the (in time) first signature is invalid)
when:
- the file is linearized (as in test1, not with test2)
- the file has an XRef stream as in test1 (and not when an xref table as in test2)
- the second signature is on page 2 (but not on page 3! - tested with the PDF spec which is
linearized and with XRef stream)
- the first signature is on page 2 and the second on page 1 (but only with your file, not
with the PDF spec)



was (Author: tilman):
All I could find out till now, that it happens  (that the (in time) first signature is invalid)
when:
- the file is linearized (as in test1, not with test2)
- the file has an XRef stream (and not when an xref table)
- the second signature is on page 2 (but not on page 3! - tested with the PDF spec)
- the first signature is on page 2 and the second on page 1 (but only with your file, not
with the PDF spec)


> Visible signatures in different pages
> -------------------------------------
>
>                 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
>            Priority: Blocker
>         Attachments: pdfbox-2.0.0-RC1_issue.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
2013
> - 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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