Example usage for org.apache.pdfbox.cos COSName LOCATION

Introduction

In this page you can find the example usage for org.apache.pdfbox.cos COSName LOCATION.

Prototype

COSName LOCATION

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Usage

From source file:test.be.fedict.eid.applet.PdfSpikeTest.java

License:Open Source License

@Test
public void testSignPDF() throws Exception {
    // create a sample PDF file
    Document document = new Document();
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    PdfWriter.getInstance(document, baos);

    document.open();/*from ww w  .ja v a2  s.co  m*/

    Paragraph titleParagraph = new Paragraph("This is a test.");
    titleParagraph.setAlignment(Paragraph.ALIGN_CENTER);
    document.add(titleParagraph);

    document.newPage();
    Paragraph textParagraph = new Paragraph("Hello world.");
    document.add(textParagraph);

    document.close();

    File tmpFile = File.createTempFile("test-", ".pdf");
    LOG.debug("tmp file: " + tmpFile.getAbsolutePath());
    FileUtils.writeByteArrayToFile(tmpFile, baos.toByteArray());

    // eID
    PcscEid pcscEid = new PcscEid(new TestView(), new Messages(Locale.getDefault()));
    if (false == pcscEid.isEidPresent()) {
        LOG.debug("insert eID card");
        pcscEid.waitForEidPresent();
    }

    List<X509Certificate> signCertificateChain = pcscEid.getSignCertificateChain();
    Certificate[] certs = new Certificate[signCertificateChain.size()];
    for (int idx = 0; idx < certs.length; idx++) {
        certs[idx] = signCertificateChain.get(idx);
    }

    // open the pdf
    FileInputStream pdfInputStream = new FileInputStream(tmpFile);
    File signedTmpFile = File.createTempFile("test-signed-", ".pdf");
    PdfReader reader = new PdfReader(pdfInputStream);
    FileOutputStream pdfOutputStream = new FileOutputStream(signedTmpFile);
    PdfStamper stamper = PdfStamper.createSignature(reader, pdfOutputStream, '\0', null, true);

    // add extra page
    Rectangle pageSize = reader.getPageSize(1);
    int pageCount = reader.getNumberOfPages();
    int extraPageIndex = pageCount + 1;
    stamper.insertPage(extraPageIndex, pageSize);

    // calculate unique signature field name
    int signatureNameIndex = 1;
    String signatureName;
    AcroFields existingAcroFields = reader.getAcroFields();
    List<String> existingSignatureNames = existingAcroFields.getSignatureNames();
    do {
        signatureName = "Signature" + signatureNameIndex;
        signatureNameIndex++;
    } while (existingSignatureNames.contains(signatureName));
    LOG.debug("new unique signature name: " + signatureName);

    PdfSignatureAppearance signatureAppearance = stamper.getSignatureAppearance();
    signatureAppearance.setCrypto(null, certs, null, PdfSignatureAppearance.SELF_SIGNED);
    signatureAppearance.setCertificationLevel(PdfSignatureAppearance.CERTIFIED_NO_CHANGES_ALLOWED);
    signatureAppearance.setReason("PDF Signature Test");
    signatureAppearance.setLocation("Belgium");
    signatureAppearance.setVisibleSignature(new Rectangle(54, 440, 234, 566), extraPageIndex, signatureName);
    signatureAppearance.setExternalDigest(new byte[128], new byte[20], "RSA");
    signatureAppearance.preClose();

    byte[] content = IOUtils.toByteArray(signatureAppearance.getRangeStream());
    byte[] hash = MessageDigest.getInstance("SHA-1").digest(content);
    byte[] signatureBytes = pcscEid.sign(hash, "SHA-1");
    pcscEid.close();

    PdfSigGenericPKCS sigStandard = signatureAppearance.getSigStandard();
    PdfPKCS7 signature = sigStandard.getSigner();
    signature.setExternalDigest(signatureBytes, hash, "RSA");
    PdfDictionary dictionary = new PdfDictionary();
    dictionary.put(PdfName.CONTENTS, new PdfString(signature.getEncodedPKCS1()).setHexWriting(true));
    signatureAppearance.close(dictionary);

    LOG.debug("signed tmp file: " + signedTmpFile.getAbsolutePath());

    // verify the signature
    reader = new PdfReader(new FileInputStream(signedTmpFile));
    AcroFields acroFields = reader.getAcroFields();
    ArrayList<String> signatureNames = acroFields.getSignatureNames();
    for (String signName : signatureNames) {
        LOG.debug("signature name: " + signName);
        LOG.debug("signature covers whole document: " + acroFields.signatureCoversWholeDocument(signName));
        LOG.debug("document revision " + acroFields.getRevision(signName) + " of "
                + acroFields.getTotalRevisions());
        PdfPKCS7 pkcs7 = acroFields.verifySignature(signName);
        Calendar signDate = pkcs7.getSignDate();
        LOG.debug("signing date: " + signDate.getTime());
        LOG.debug("Subject: " + PdfPKCS7.getSubjectFields(pkcs7.getSigningCertificate()));
        LOG.debug("Document modified: " + !pkcs7.verify());
        Certificate[] verifyCerts = pkcs7.getCertificates();
        for (Certificate certificate : verifyCerts) {
            X509Certificate x509Certificate = (X509Certificate) certificate;
            LOG.debug("cert subject: " + x509Certificate.getSubjectX500Principal());
        }
    }

    /*
     * Reading the signature using Apache PDFBox.
     */
    PDDocument pdDocument = PDDocument.load(signedTmpFile);
    COSDictionary trailer = pdDocument.getDocument().getTrailer();
    /*
     * PDF Reference - third edition - Adobe Portable Document Format -
     * Version 1.4 - 3.6.1 Document Catalog
     */
    COSDictionary documentCatalog = (COSDictionary) trailer.getDictionaryObject(COSName.ROOT);

    /*
     * 8.6.1 Interactive Form Dictionary
     */
    COSDictionary acroForm = (COSDictionary) documentCatalog.getDictionaryObject(COSName.ACRO_FORM);

    COSArray fields = (COSArray) acroForm.getDictionaryObject(COSName.FIELDS);
    for (int fieldIdx = 0; fieldIdx < fields.size(); fieldIdx++) {
        COSDictionary field = (COSDictionary) fields.getObject(fieldIdx);
        String fieldType = field.getNameAsString("FT");
        if ("Sig".equals(fieldType)) {
            COSDictionary signatureDictionary = (COSDictionary) field.getDictionaryObject(COSName.V);
            /*
             * TABLE 8.60 Entries in a signature dictionary
             */
            COSString signatoryName = (COSString) signatureDictionary.getDictionaryObject(COSName.NAME);
            if (null != signatoryName) {
                LOG.debug("signatory name: " + signatoryName.getString());
            }
            COSString reason = (COSString) signatureDictionary.getDictionaryObject(COSName.REASON);
            if (null != reason) {
                LOG.debug("reason: " + reason.getString());
            }
            COSString location = (COSString) signatureDictionary.getDictionaryObject(COSName.LOCATION);
            if (null != location) {
                LOG.debug("location: " + location.getString());
            }
            Calendar signingTime = signatureDictionary.getDate(COSName.M);
            if (null != signingTime) {
                LOG.debug("signing time: " + signingTime.getTime());
            }
            String signatureHandler = signatureDictionary.getNameAsString(COSName.FILTER);
            LOG.debug("signature handler: " + signatureHandler);
        }
    }
}

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