[PDFBOX-2767] ClassCastException in PDDocument.addSignature

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.8.9, 1.8.10, 2.0.0
• Fix Version/s: 1.8.10, 2.0.0
• Component/s: Signing
• External issue URL: http://stackoverflow.com/questions/17452869/pdfbox-add-visual-signature-cosobject-cast-error
• Assignee: Tilman Hausherr
• Reporter: Tilman Hausherr
• Created: 20/Apr/15 21:07
• Updated: 23/Jul/15 06:35
• Resolved: 20/Apr/15 21:20

Description

As reported here in 2013:
http://stackoverflow.com/questions/17452869/pdfbox-add-visual-signature-cosobject-cast-error

Exception in thread "main" java.lang.ClassCastException: org.apache.pdfbox.cos.COSObject cannot be cast to org.apache.pdfbox.cos.COSDictionary at org.apache.pdfbox.pdmodel.PDDocument.addSignature(PDDocument.java:474)

The cause is explained in the answer by Michael Klink, our code fails with an object reference.