Example usage for com.itextpdf.text.pdf.security LtvTimestamp timestamp

Introduction

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

Prototype

public static void timestamp(PdfSignatureAppearance sap, TSAClient tsa, String signatureName)
        throws IOException, DocumentException, GeneralSecurityException 

Source Link

Document

Signs a document with a PAdES-LTV Timestamp.

Usage

From source file:org.opencps.pki.PdfSigner.java

License:Open Source License

/**
 * Compute digest hash/*from  w ww  .j  a va 2s . c  o m*/
 */
protected byte[] computeDigest(float llx, float lly, float urx, float ury) throws SignatureException {
    byte digestHash[] = null;
    int contentEstimated = 8192;
    try {
        PdfReader reader = new PdfReader(getOriginFilePath());
        FileOutputStream os = new FileOutputStream(getTempFilePath());
        PdfStamper stamper = PdfStamper.createSignature(reader, os, '\0');
        PdfSignatureAppearance appearance = stamper.getSignatureAppearance();
        signatureFieldName = appearance.getNewSigName();
        TSAClient tsaClient = null;
        appearance.setCertificate(getCertificate());
        String tsaUrl = CertificateUtil.getTSAURL(getCertificate());
        if (tsaUrl != null) {
            tsaClient = new TSAClientBouncyCastle(tsaUrl);
        }
        if (tsaClient != null) {
            LtvTimestamp.timestamp(appearance, tsaClient, signatureFieldName);
            contentEstimated += 4096;
        }

        appearance.setSignDate(signDate);
        CertificateInfo certInfo = new CertificateInfo(getCertificate());
        appearance.setLocation(certInfo.getOrganizationUnit());
        appearance.setReason("Document is signed by " + certInfo.getCommonName());
        appearance.setContact(certInfo.getCommonName());
        if (!isVisible) {
            appearance.setVisibleSignature(new Rectangle(0, 0, 0, 0), 1, signatureFieldName);
        } else {
            if (signatureImage != null) {
                appearance.setSignatureGraphic(signatureImage.getImage());
                appearance.setRenderingMode(PdfSignatureAppearance.RenderingMode.GRAPHIC);
            } else {
                appearance.setLayer2Text(certInfo.getCommonName());
            }
            appearance.setVisibleSignature(new Rectangle(llx, lly, urx, ury), 1, signatureFieldName);
        }

        ExternalSignatureContainer external = new ExternalBlankSignatureContainer(PdfName.ADOBE_PPKLITE,
                PdfName.ADBE_PKCS7_DETACHED);
        MakeSignature.signExternalContainer(appearance, external, contentEstimated);

        digestHash = DigestAlgorithms.digest(appearance.getRangeStream(),
                digest.getMessageDigest(getHashAlgorithm().toString()));

        reader.close();
        os.close();
    } catch (Exception e) {
        throw new SignatureException(e.getMessage(), e);
    }
    return digestHash;
}

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