[PDFBOX-3978] IllegalStateException on saveIncrementalForExternalSigning

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.7
• Fix Version/s: 2.0.8, 3.0.0 PDFBox
• Component/s: Signing
• Labels: regression
• Assignee: Tilman Hausherr
• Reporter: Alessandro Marini
• Created: 24/Oct/17 08:03
• Updated: 02/Nov/17 21:01
• Resolved: 25/Oct/17 15:24

Description

When adding a signature to a PDF document which already contains an invisible signature, the following exception is thrown:

java.lang.IllegalStateException: signature reserve byte range has been changed after addSignature(), please set the byte range that existed after addSignature()

Step to reproduce:

• Get a simple PDf document having an empty signature field and signed (using Adobe) with an invisible signature.
• Run the org.apache.pdfbox.examples.signature.CreateVisibleSignature setting lateExternalSigning = true

Full Stack trace:

java.lang.IllegalStateException: signature reserve byte range has been changed after addSignature(), please set the byte range that existed after addSignature()
	at org.apache.pdfbox.pdmodel.PDDocument.saveIncrementalForExternalSigning(PDDocument.java:1361)
	at org.apache.pdfbox.examples.signature.CreateVisibleSignature.signPDF(CreateVisibleSignature.java:270)

Use the attached PDF as reference to reproduce

Maybe related to: PDFBOX-3811

Issue Links

• relates to: PDFBOX-3811 Problem with calling "saveIncrementalForExternalSigning" more than once in the same document