Example usage for org.apache.pdfbox.pdmodel.interactive.digitalsignature SignatureInterface SignatureInterface

Introduction

In this page you can find the example usage for org.apache.pdfbox.pdmodel.interactive.digitalsignature SignatureInterface SignatureInterface.

Prototype

SignatureInterface

Source Link

Usage

From source file:eu.europa.ec.markt.dss.signature.pdf.pdfbox.PdfBoxSignatureService.java

License:Open Source License

private byte[] signDocumentAndReturnDigest(final SignatureParameters parameters, final byte[] signatureBytes,
        final File signedFile, final FileOutputStream fileOutputStream, final PDDocument pdDocument,
        final PDSignature pdSignature, final DigestAlgorithm digestAlgorithm) throws DSSException {

    try {/*from   w  w  w.j ava 2s .  c o m*/

        final MessageDigest digest = DSSUtils.getMessageDigest(digestAlgorithm);
        // register signature dictionary and sign interface
        SignatureInterface signatureInterface = new SignatureInterface() {

            @Override
            public byte[] sign(InputStream content) throws SignatureException, IOException {

                byte[] b = new byte[4096];
                int count;
                while ((count = content.read(b)) > 0) {
                    digest.update(b, 0, count);
                }
                return signatureBytes;
            }
        };
        pdDocument.addSignature(pdSignature, signatureInterface);

        saveDocumentIncrementally(parameters, signedFile, fileOutputStream, pdDocument);
        final byte[] digestValue = digest.digest();
        if (LOG.isDebugEnabled()) {
            LOG.debug("Digest to be signed: " + DSSUtils.encodeHexString(digestValue));
        }
        fileOutputStream.close();
        return digestValue;
    } catch (NoSuchAlgorithmException e) {
        throw new DSSException(e);
    } catch (IOException e) {
        throw new DSSException(e);
    } catch (SignatureException e) {
        throw new DSSException(e);
    }
}

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From source file:eu.europa.esig.dss.pdf.pdfbox.PdfBoxSignatureService.java

License:Open Source License

private byte[] signDocumentAndReturnDigest(final PAdESSignatureParameters parameters,
        final byte[] signatureBytes, final File signedFile, final FileOutputStream fileOutputStream,
        final PDDocument pdDocument, final PDSignature pdSignature, final DigestAlgorithm digestAlgorithm)
        throws DSSException {

    SignatureOptions options = new SignatureOptions();
    try {//from ww w.  j ava  2  s .  c  om

        final MessageDigest digest = DSSUtils.getMessageDigest(digestAlgorithm);
        // register signature dictionary and sign interface
        SignatureInterface signatureInterface = new SignatureInterface() {

            @Override
            public byte[] sign(InputStream content) throws SignatureException, IOException {

                byte[] b = new byte[4096];
                int count;
                while ((count = content.read(b)) > 0) {
                    digest.update(b, 0, count);
                }
                return signatureBytes;
            }
        };

        options.setPreferedSignatureSize(parameters.getSignatureSize());
        if (parameters.getImageParameters() != null) {
            fillImageParameters(pdDocument, parameters.getImageParameters(), options);
        }
        pdDocument.addSignature(pdSignature, signatureInterface, options);

        saveDocumentIncrementally(parameters, signedFile, fileOutputStream, pdDocument);
        final byte[] digestValue = digest.digest();
        if (logger.isDebugEnabled()) {
            logger.debug("Digest to be signed: " + Hex.encodeHexString(digestValue));
        }
        fileOutputStream.close();
        return digestValue;
    } catch (IOException e) {
        throw new DSSException(e);
    } catch (SignatureException e) {
        throw new DSSException(e);
    } finally {
        IOUtils.closeQuietly(options.getVisualSignature());
    }
}

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