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https://issues.apache.org/jira/browse/PDFBOX-1751?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thomas Chojecki resolved PDFBOX-1751.
-------------------------------------
Resolution: Duplicate
was fixed with PDFBOX-1780
> Signing external signed document again with pdfbox, break the document.
> -----------------------------------------------------------------------
>
> Key: PDFBOX-1751
> URL: https://issues.apache.org/jira/browse/PDFBOX-1751
> Project: PDFBox
> Issue Type: Bug
> Components: Signing
> Affects Versions: 1.8.0, 1.8.1, 1.8.2
> Environment: Windows 8.1
> Reporter: David KELLER
> Assignee: Thomas Chojecki
> Labels: security, signature
> Attachments: PADESSigner.java, contract.pdf,
> contract.pdf_signedIText.pdf, contract.pdf_signedPdfBox.pdf,
> contract_signed_Cryptolog.pdf
>
>
> 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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