David KELLER created PDFBOX-1751:
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             Summary: SignDict/Contents illegal data
                 Key: PDFBOX-1751
                 URL: https://issues.apache.org/jira/browse/PDFBOX-1751
             Project: PDFBox
          Issue Type: Bug
          Components: Signing
    Affects Versions: 1.8.0
         Environment: Windows 8.1
            Reporter: David KELLER


1/ I sign a file using this method

        public static void signByPdfbox(
                        File inputPDF,
                        File outputPDF,
                        KeyStore ks,
                        String password) 
        throws IOException, UnrecoverableKeyException, KeyStoreException, 
NoSuchAlgorithmException, COSVisitorException, SignatureException {

                PDDocument inputDoc = PDDocument.load(inputPDF);
                
                
                PADESSigner signer = new PADESSigner(ks, password);
                
                signer.setSignatureName("Hello1");
                signer.setSignatureReason("Why noy");
                signer.setSignatureLocation("Curacao");
                signer.setSignatureContactInfo("david.keller...@gmail.com");
                
                signer.signPDF(inputDoc, outputPDF);
        }



2/ I resign the same file using the same method and in acrobat reader I have 
this error : SignDict/Contents illegal data

I have googelized it, and I found only old topics for iText lib.
I have tried the same with iText 5.X, and double signatures works






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