Dear PDFBox community We use PDFBox (version 2.0.26) for signing documents and we are currently facing a problem signing a particular document (however, this doesn’t seem to be an isolated case, since in the past we received the notification of similar error messages, but we couldn’t have access to the affected documents). This document already contains a filled form and a signature (with LTV support) and when you open the document with Acrobat Reader you get the message: "This document enabled extended features in Adobe Acrobat Reader. The document has been changed since it was created and use of extended features is no longer available. Please contact the author for the original version of this document.”
Now, when we try to sign it, also using an LTV-enabled signature (Advanced or Qualified), we receive following error message: java.io.IOException: Can't write new byteRange '0 542575 554377 7562]' not enough space: byteRange.length(): 21, byteRangeLength: 20 at org.apache.pdfbox.pdfwriter.COSWriter.doWriteSignature(COSWriter.java:763) at org.apache.pdfbox.pdfwriter.COSWriter.visitFromDocument(COSWriter.java:1199) at org.apache.pdfbox.cos.COSDocument.accept(COSDocument.java:452) at org.apache.pdfbox.pdfwriter.COSWriter.write(COSWriter.java:1435) at org.apache.pdfbox.pdmodel.PDDocument.saveIncremental(PDDocument.java:1412) at com.swisscom.ais.client.impl.PdfDocument.finishSignature(PdfDocument.java:180) ... 4 more Instead adding a simple timestamp (without LTV) it works without issues. The byteRange length referred in the stack trace is the one of the OLD signature and not of the one we are adding to the document (please note that for the new one we reserve a size of 30’000 bytes, and also increasing this size has no impact). Unfortunately I’m not allowed to share with you this document (I’m trying to arrange the creation of a new sample document with the same properties, but the author of the file is currently in holiday). In the PDFBox Jira I’ve found some already solved issues regarding saveIncremental and these “extended features”: https://issues.apache.org/jira/browse/PDFBOX-45 https://issues.apache.org/jira/browse/PDFBOX-2857 https://issues.apache.org/jira/browse/PDFBOX-2858 https://issues.apache.org/jira/browse/PDFBOX-2859 In one of these issues (PDFBOX-2858), I found a file example (santander_freistellungsauftrag_modified.pdf <https://issues.apache.org/jira/secure/attachment/12744154/santander_freistellungsauftrag_modified.pdf>). I’ve try to sign it (and also countersign it) but “unfortunately” also this one worked without any issue. Can you kindly help me solving this problem? Thanks and best regards, Patrick
