[jira] [Commented] (PDFBOX-5717) NullPointerException calling saveIncrementalForExternalSigning

["Andreas Lehmkühler (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PDFBOX-5717?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17788831#comment-17788831 ] 

Andreas Lehmkühler commented on PDFBOX-5717:
--------------------------------------------

[~daniriba] please attach the stacktrace of the NPE as well

> NullPointerException calling saveIncrementalForExternalSigning
> --------------------------------------------------------------
>
>                 Key: PDFBOX-5717
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-5717
>             Project: PDFBox
>          Issue Type: Bug
>          Components: Signing
>    Affects Versions: 3.0.0 PDFBox
>            Reporter: Daniele Ribaudo
>            Priority: Major
>         Attachments: Cryptomathic_White_Paper_-_eIDAS_Compliant_Remote_eSigning.pdf
>
>
> I tried to apply a digital signature to the attached PDF using the method PDDocument.saveIncrementalForExternalSigning in the release 3.0.0 of PDFBox but a NPE is thrown every time.
> The same action executed on a 2.0.x release is successfully completed.
> Here you are a snipped code to reproduce the error:
>    
> {code:java}
> PDDocument document = Loader.loadPDF(new File("Cryptomathic_White_Paper_-_eIDAS_Compliant_Remote_eSigning.pdf"));
> document.addSignature(new PDSignature(), new SignatureOptions());
> ExternalSigningSupport externalSigning = document.saveIncrementalForExternalSigning(new ByteArrayOutputStream());
> {code}



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