[PDFBOX-4091] Cannot analyze signatures : Wrong type of referenced length object COSObject

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.0.7, 2.0.8
• Fix Version/s: 2.0.9, 3.0.0 PDFBox
• Component/s: Parsing
• Assignee: Andreas Lehmkühler
• Reporter: Endre Pető
• Created: 01/Feb/18 13:54
• Updated: 24/Mar/18 09:41
• Resolved: 04/Feb/18 16:27

Description

Dear Colleagues,

From one of our customer, we have got a pdf. According them and the adobe there is a PKCS7 signature but according the DSS 5.2 there is no. I attached this voucher.

What do you think?

One of DSS developer quickly checked their log and we got:

e.e.e.d.p.pdfbox.PdfBoxSignatureService : Cannot analyze signatures : Wrong type of referenced length object COSObject
Unknown macro: {8, 0}
: COSDictionary
java.io.IOException: Wrong type of referenced length object COSObject

: COSDictionary
at org.apache.pdfbox.pdfparser.COSParser.getLength(COSParser.java:908) ~[pdfbox-2.0.7.jar!/:2.0.7]
at org.apache.pdfbox.pdfparser.COSParser.parseCOSStream(COSParser.java:950) ~[pdfbox-2.0.7.jar!/:2.0.7]
at org.apache.pdfbox.pdfparser.COSParser.parseFileObject(COSParser.java:781) ~[pdfbox-2.0.7.jar!/:2.0.7]
at org.apache.pdfbox.pdfparser.COSParser.parseObjectDynamically(COSParser.java:742) ~[pdfbox-2.0.7.jar!/:2.0.7]
at org.apache.pdfbox.pdfparser.COSParser.parseObjectDynamically(COSParser.java:673) ~[pdfbox-2.0.7.jar!/:2.0.7]
at org.apache.pdfbox.pdfparser.COSParser.parseDictObjects(COSParser.java:633) ~[pdfbox-2.0.7.jar!/:2.0.7]
at org.apache.pdfbox.pdfparser.PDFParser.initialParse(PDFParser.java:241) ~[pdfbox-2.0.7.jar!/:2.0.7]
at org.apache.pdfbox.pdfparser.PDFParser.parse(PDFParser.java:276) ~[pdfbox-2.0.7.jar!/:2.0.7]
at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:1224) ~[pdfbox-2.0.7.jar!/:2.0.7]
at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:1201) ~[pdfbox-2.0.7.jar!/:2.0.7]
at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:1182) ~[pdfbox-2.0.7.jar!/:2.0.7]
at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:1165) ~[pdfbox-2.0.7.jar!/:2.0.7]
at eu.europa.esig.dss.pdf.pdfbox.PdfBoxSignatureService.getSignatures(PdfBoxSignatureService.java:321) [dss-pades-5.2.jar!/:na]