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  1. PDFBox
  2. PDFBOX-3978

IllegalStateException on saveIncrementalForExternalSigning

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      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

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              • Assignee:
                tilman Tilman Hausherr
                Reporter:
                ale.marini Alessandro Marini
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                • Created:
                  Updated:
                  Resolved: