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https://issues.apache.org/jira/browse/PDFBOX-1822?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13865747#comment-13865747
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Álison Fernandes commented on PDFBOX-1822:
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To clarify, I consider this to be different problems [~tchojecki]. I'm not
trying to digitally sign a previously manipulated PDF, I'm doing a 3 step
process: Manipulate, save, sign the saved file.
What triggers me to blame PDDocument.save(...) was doing the following steps,
provided a *original.pdf*:
*Case 1:*
* Sign *original.pdf*
* Adobe Reader validates the signature
*Case 2:*
* Load *original.pdf* to a PDDocument
* Save *original.pdf* to a temporary file
* Sign the temporary file
* Adobe Reader reports that the byte range is invalid
If you need further info, we can discuss it in the mailing list as you've
stated.
> Signature byte range is Invalid
> -------------------------------
>
> Key: PDFBOX-1822
> URL: https://issues.apache.org/jira/browse/PDFBOX-1822
> Project: PDFBox
> Issue Type: Bug
> Components: Parsing, PDModel, PDModel.AcroForm, Signing
> Affects Versions: 1.8.3, 1.8.4, 2.0.0
> Reporter: vakhtang koroghlishvili
> Attachments: araxis-merge - compare two document.jpg,
> damaged-sig.jpg, unsigned-signed.pdf, unsigned.pdf
>
>
> On person send me a unsigned PDF document. He wanted to sign it. When I try
> to sign it (using pad box), I have some problem.
> After signing adobe reader tells me "The signature byre range is invalid".
> I will attach original and signed document.
> I think, it is PDF box parser error. another signature libraries sign
> document very well. I'm searching the problem at the moment, in order to fix
> it.
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