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https://issues.apache.org/jira/browse/PDFBOX-4609?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16892449#comment-16892449
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bal commented on PDFBOX-4609:
-----------------------------
I removed unwanted trailer entry generated new pdf with signature but it
results in invalid signature. i have doubt is cross reference mismatch in the
original and signed pdf results in invalid signature? i checked the pdfs with
editor there is change in the xref entries in both pdf. Thanks.
> How valid pdf generated after signature insertion?
> ---------------------------------------------------
>
> Key: PDFBOX-4609
> URL: https://issues.apache.org/jira/browse/PDFBOX-4609
> Project: PDFBox
> Issue Type: Wish
> Components: .NET, Utilities
> Affects Versions: 1.8.15
> Reporter: bal
> Priority: Major
> Fix For: 1.8.15
>
>
> I am getting signature is invalid error in the signature panel of pdf after
> pkcs 7 signature insertion. I can see the name of the signer with the signed
> by in signature panel. I am not able to find out disallowed changes pdfbox
> does resulting into invalid pdf by acrobat reader. Is it possible to
> validate the pdf with pdfbox? Thanks in advance.
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