[
https://issues.apache.org/jira/browse/PDFBOX-4995?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17217742#comment-17217742
]
Michael Klink commented on PDFBOX-4995:
---------------------------------------
As an aside...
{quote}This is what DSS team member wrote{quote}
Actually I'm merely a DSS user who by chance knows a bit about PDFs in general
and PDF signatures in particular.
> Multiple PDF signatures with image
> ----------------------------------
>
> Key: PDFBOX-4995
> URL: https://issues.apache.org/jira/browse/PDFBOX-4995
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 2.0.20
> Reporter: Daniel Gorelic
> Priority: Critical
> Attachments: signed.pdf
>
>
> A second PDF signature with an image invalidates the first one. If there is
> no image, the first signature remains valid.
> This is what DSS team member wrote:
> Indeed this appears to be a PDFBox bug: One indirect object from the original
> document revision is completely unnecessarily overwritten in each signed
> revision with an object with the identical content. In spite of this not
> actually changing the page content, Adobe Reader apparently considers this
> suspicious enough to claim a document change and signature invalidation.
> The object in question is the object 54 0 which is a color space resource for
> each of the three document pages:
> {code:java}
> 54 0 obj
> /DeviceGray
> endobj {code}
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
