Examples with ExternalDigest com.itextpdf.text.pdf.security.ExternalDigest used on opensource projects

Example 1 with ExternalDigest

use of com.itextpdf.text.pdf.security.ExternalDigest in project commons by mosip.

the class PDFGeneratorImpl method signAndEncryptPDF.

@Override
public OutputStream signAndEncryptPDF(byte[] pdf, io.mosip.kernel.core.pdfgenerator.model.Rectangle rectangle, String reason, int pageNumber, Provider provider, CertificateEntry<X509Certificate, PrivateKey> certificateEntry, String password) throws IOException, GeneralSecurityException {
    OutputStream outputStream = new ByteArrayOutputStream();
    PdfReader pdfReader = null;
    PdfStamper pdfStamper = null;
    try {
        pdfReader = new PdfReader(pdf);
        pdfStamper = PdfStamper.createSignature(pdfReader, outputStream, '\0');
        LOGGER.debug("certificate entry {}", certificateEntry);
        LOGGER.info("provider {}", provider);
        if (password != null && !password.trim().isEmpty()) {
            pdfStamper.setEncryption(password.getBytes(), pdfOwnerPassword.getBytes(), com.itextpdf.text.pdf.PdfWriter.ALLOW_PRINTING, com.itextpdf.text.pdf.PdfWriter.ENCRYPTION_AES_256);
        }
        PdfSignatureAppearance signAppearance = pdfStamper.getSignatureAppearance();
        signAppearance.setReason(reason);
        // comment next line to have an invisible signature
        signAppearance.setVisibleSignature(new Rectangle(rectangle.getLlx(), rectangle.getLly(), rectangle.getUrx(), rectangle.getUry()), pageNumber, null);
        OcspClient ocspClient = new OcspClientBouncyCastle(null);
        TSAClient tsaClient = null;
        for (X509Certificate certificate : certificateEntry.getChain()) {
            String tsaUrl = CertificateUtil.getTSAURL(certificate);
            if (tsaUrl != null) {
                tsaClient = new TSAClientBouncyCastle(tsaUrl);
                break;
            }
            signAppearance.setCertificate(certificate);
        }
        List<CrlClient> crlList = new ArrayList<>();
        crlList.add(new CrlClientOnline(certificateEntry.getChain()));
        ExternalSignature pks = new PrivateKeySignature(certificateEntry.getPrivateKey(), SHA256, provider.getName());
        ExternalDigest digest = new BouncyCastleDigest();
        // Sign the document using the detached mode, CMS or CAdES equivalent.
        MakeSignature.signDetached(signAppearance, digest, pks, certificateEntry.getChain(), crlList, ocspClient, tsaClient, 0, CryptoStandard.CMS);
    } catch (DocumentException e) {
        LOGGER.error("Document Exception occur {}", e.getCause());
        throw new PDFGeneratorException(PDFGeneratorExceptionCodeConstant.PDF_EXCEPTION.getErrorCode(), e.getMessage(), e);
    } finally {
        outputStream.close();
        if (pdfStamper != null) {
            closeQuietly(pdfStamper);
        }
        if (pdfReader != null) {
            pdfReader.close();
        }
    }
    return outputStream;
}