Example usage for com.itextpdf.text.pdf.security DigestAlgorithms SHA256

Introduction

In this page you can find the example usage for com.itextpdf.text.pdf.security DigestAlgorithms SHA256.

Prototype

String SHA256

To view the source code for com.itextpdf.text.pdf.security DigestAlgorithms SHA256.

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Document

Algorithm available for signatures since PDF 1.6

Usage

From source file:SigningProcess.java

public static String sign(String base64, HashMap map) {
    String base64string = null;/*from  w ww  .j  a  v  a  2  s. com*/
    try {
        System.out.println("map :" + map);
        // Getting a set of the entries
        Set set = map.entrySet();
        System.out.println("set :" + set);
        // Get an iterator
        Iterator it = set.iterator();
        // Display elements
        while (it.hasNext()) {
            Entry me = (Entry) it.next();
            String key = (String) me.getKey();
            if ("privateKey".equalsIgnoreCase(key)) {
                privateKey = (PrivateKey) me.getValue();
            }
            if ("certificateChain".equalsIgnoreCase(key)) {
                certificateChain = (X509Certificate[]) me.getValue();
            }
        }

        OcspClient ocspClient = new OcspClientBouncyCastle();
        TSAClient tsaClient = null;
        for (int i = 0; i < certificateChain.length; i++) {
            X509Certificate cert = (X509Certificate) certificateChain[i];
            String tsaUrl = CertificateUtil.getTSAURL(cert);
            if (tsaUrl != null) {
                tsaClient = new TSAClientBouncyCastle(tsaUrl);
                break;
            }
        }
        List<CrlClient> crlList = new ArrayList<CrlClient>();
        crlList.add(new CrlClientOnline(certificateChain));

        String property = System.getProperty("java.io.tmpdir");
        BASE64Decoder decoder = new BASE64Decoder();
        byte[] FileByte = decoder.decodeBuffer(base64);
        writeByteArraysToFile(property + "_unsigned.pdf", FileByte);

        // Creating the reader and the stamper
        PdfReader reader = new PdfReader(property + "_unsigned.pdf");
        FileOutputStream os = new FileOutputStream(property + "_signed.pdf");
        PdfStamper stamper = PdfStamper.createSignature(reader, os, '\0');
        // Creating the appearance
        PdfSignatureAppearance appearance = stamper.getSignatureAppearance();
        //            appearance.setReason(reason);
        //            appearance.setLocation(location);
        appearance.setAcro6Layers(false);
        appearance.setVisibleSignature(new Rectangle(36, 748, 144, 780), 1, "sig1");
        // Creating the signature
        ExternalSignature pks = new PrivateKeySignature((PrivateKey) privateKey, DigestAlgorithms.SHA256,
                providerMSCAPI.getName());
        ExternalDigest digest = new BouncyCastleDigest();
        MakeSignature.signDetached(appearance, digest, pks, certificateChain, crlList, ocspClient, tsaClient, 0,
                MakeSignature.CryptoStandard.CMS);

        InputStream docStream = new FileInputStream(property + "_signed.pdf");
        byte[] encodeBase64 = Base64.encodeBase64(IOUtils.toByteArray(docStream));
        base64string = new String(encodeBase64);
    } catch (IOException ex) {
        System.out.println("Exception :" + ex.getLocalizedMessage());
    } catch (DocumentException ex) {
        System.out.println("Exception :" + ex.getLocalizedMessage());
    } catch (GeneralSecurityException ex) {
        System.out.println("Exception :" + ex.getLocalizedMessage());
    }
    return base64string;
}

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From source file:org.roda.common.certification.PDFSignatureUtils.java

public static Path runDigitalSignatureSign(Path input, String keystore, String alias, String password,
        String reason, String location, String contact)
        throws IOException, GeneralSecurityException, DocumentException {

    Security.addProvider(new BouncyCastleProvider());
    Path signedPDF = Files.createTempFile("signed", ".pdf");

    KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
    InputStream is = new FileInputStream(keystore);
    ks.load(is, password.toCharArray());
    PrivateKey pk = (PrivateKey) ks.getKey(alias, password.toCharArray());
    Certificate[] chain = ks.getCertificateChain(alias);
    IOUtils.closeQuietly(is);/*from w  ww  .jav a 2  s.  c o m*/

    PdfReader reader = new PdfReader(input.toString());
    FileOutputStream os = new FileOutputStream(signedPDF.toFile());
    PdfStamper stamper = PdfStamper.createSignature(reader, os, '\0');
    PdfSignatureAppearance appearance = stamper.getSignatureAppearance();
    appearance.setReason(reason);
    appearance.setLocation(location);
    appearance.setContact(contact);
    appearance.setVisibleSignature(new Rectangle(36, 748, 144, 780), 1, "RODASignature");
    ExternalDigest digest = new BouncyCastleDigest();
    ExternalSignature signature = new PrivateKeySignature(pk, DigestAlgorithms.SHA256, "BC");
    MakeSignature.signDetached(appearance, digest, signature, chain, null, null, null, 0, null);
    IOUtils.closeQuietly(os);
    reader.close();

    return signedPDF;
}

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From source file:org.roda.core.plugins.plugins.characterization.PDFSignatureUtils.java

public static Path runDigitalSignatureSign(Path input, String keystore, String alias, String password,
        String reason, String location, String contact)
        throws IOException, GeneralSecurityException, DocumentException {

    Security.addProvider(new BouncyCastleProvider());
    Path signedPDF = Files.createTempFile("signed", ".pdf");

    KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());

    try (InputStream is = new FileInputStream(keystore)) {
        ks.load(is, password.toCharArray());

        PrivateKey pk = (PrivateKey) ks.getKey(alias, password.toCharArray());
        Certificate[] chain = ks.getCertificateChain(alias);

        try (FileOutputStream os = new FileOutputStream(signedPDF.toFile())) {
            PdfReader reader = new PdfReader(input.toString());
            PdfStamper stamper = PdfStamper.createSignature(reader, os, '\0');
            PdfSignatureAppearance appearance = stamper.getSignatureAppearance();
            appearance.setReason(reason);
            appearance.setLocation(location);
            appearance.setContact(contact);
            appearance.setVisibleSignature(new Rectangle(36, 748, 144, 780), 1, "RODASignature");
            ExternalDigest digest = new BouncyCastleDigest();
            ExternalSignature signature = new PrivateKeySignature(pk, DigestAlgorithms.SHA256, "BC");
            MakeSignature.signDetached(appearance, digest, signature, chain, null, null, null, 0, null);
            reader.close();//w  ww . j a v a2s.c  om
        }
    }

    return signedPDF;
}

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