Examples with PGPLiteralData org.bouncycastle.openpgp.PGPLiteralData used on opensource projects

Example 1 with PGPLiteralData

use of org.bouncycastle.openpgp.PGPLiteralData in project camel by apache.

the class PGPKeyAccessDataFormat method unmarshal.

public Object unmarshal(Exchange exchange, InputStream encryptedStream) throws Exception {
    //NOPMD
    if (encryptedStream == null) {
        return null;
    }
    InputStream in = null;
    InputStream encData = null;
    InputStream uncompressedData = null;
    InputStream litData = null;
    OutputStreamBuilder osb = null;
    try {
        in = PGPUtil.getDecoderStream(encryptedStream);
        encData = getDecryptedData(exchange, in);
        PGPObjectFactory pgpFactory = new PGPObjectFactory(encData, new BcKeyFingerprintCalculator());
        Object object = pgpFactory.nextObject();
        if (object instanceof PGPCompressedData) {
            PGPCompressedData comData = (PGPCompressedData) object;
            uncompressedData = comData.getDataStream();
            pgpFactory = new PGPObjectFactory(uncompressedData, new BcKeyFingerprintCalculator());
            object = pgpFactory.nextObject();
        } else {
            LOG.debug("PGP Message does not contain a Compressed Data Packet");
        }
        PGPOnePassSignature signature;
        if (object instanceof PGPOnePassSignatureList) {
            signature = getSignature(exchange, (PGPOnePassSignatureList) object);
            object = pgpFactory.nextObject();
        } else {
            // no signature contained in PGP message
            signature = null;
            if (SIGNATURE_VERIFICATION_OPTION_REQUIRED.equals(getSignatureVerificationOption())) {
                throw new PGPException("PGP message does not contain any signatures although a signature is expected. Either send a PGP message with signature or change the configuration of the PGP decryptor.");
            }
        }
        PGPLiteralData ld;
        if (object instanceof PGPLiteralData) {
            ld = (PGPLiteralData) object;
        } else {
            throw getFormatException();
        }
        litData = ld.getInputStream();
        osb = OutputStreamBuilder.withExchange(exchange);
        byte[] buffer = new byte[BUFFER_SIZE];
        int bytesRead;
        while ((bytesRead = litData.read(buffer)) != -1) {
            osb.write(buffer, 0, bytesRead);
            if (signature != null) {
                signature.update(buffer, 0, bytesRead);
            }
            osb.flush();
        }
        verifySignature(pgpFactory, signature);
    } finally {
        IOHelper.close(osb, litData, uncompressedData, encData, in, encryptedStream);
    }
    return osb.build();
}