[PDFBOX-5717] NullPointerException calling saveIncrementalForExternalSigning

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0 PDFBox
• Fix Version/s: 3.0.2 PDFBox, 4.0.0
• Component/s: Signing
• Assignee: Andreas Lehmkühler
• Reporter: Daniele Ribaudo
• Created: 22/Nov/23 08:11
• Updated: 14/Mar/24 20:57
• Resolved: 14/Feb/24 07:30

Description

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:

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());

Issue Links

• is duplicated by: PDFBOX-5759 NPE in COSWriter caused by undefined object
• links to: NPE caused by undefined object #177