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https://issues.apache.org/jira/browse/PDFBOX-4091?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andreas Lehmkühler resolved PDFBOX-4091.
----------------------------------------
       Resolution: Fixed
    Fix Version/s: 3.0.0 PDFBox
                   2.0.9

> Cannot analyze signatures : Wrong type of referenced length object COSObject
> ----------------------------------------------------------------------------
>
>                 Key: PDFBOX-4091
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-4091
>             Project: PDFBox
>          Issue Type: Bug
>          Components: Parsing
>    Affects Versions: 2.0.7, 2.0.8
>            Reporter: Endre Pető 
>            Assignee: Andreas Lehmkühler
>            Priority: Critical
>             Fix For: 2.0.9, 3.0.0 PDFBox
>
>         Attachments: E-SZ00104418_20180111_040700.pdf
>
>
> 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]



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