Java 类org.bouncycastle.openpgp.PGPCompressedDataGenerator 实例源码

public static byte[] encrypt( final byte[] message, final PGPPublicKey publicKey, boolean armored )
        throws PGPException
{
    try
    {
        final ByteArrayInputStream in = new ByteArrayInputStream( message );
        final ByteArrayOutputStream bOut = new ByteArrayOutputStream();
        final PGPLiteralDataGenerator literal = new PGPLiteralDataGenerator();
        final PGPCompressedDataGenerator comData = new PGPCompressedDataGenerator( CompressionAlgorithmTags.ZIP );
        final OutputStream pOut =
                literal.open( comData.open( bOut ), PGPLiteralData.BINARY, "filename", in.available(), new Date() );
        Streams.pipeAll( in, pOut );
        comData.close();
        final byte[] bytes = bOut.toByteArray();
        final PGPEncryptedDataGenerator generator = new PGPEncryptedDataGenerator(
                new JcePGPDataEncryptorBuilder( SymmetricKeyAlgorithmTags.AES_256 ).setWithIntegrityPacket( true )
                                                                                   .setSecureRandom(
                                                                                           new SecureRandom() )

                                                                                   .setProvider( provider ) );
        generator.addMethod( new JcePublicKeyKeyEncryptionMethodGenerator( publicKey ).setProvider( provider ) );
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        OutputStream theOut = armored ? new ArmoredOutputStream( out ) : out;
        OutputStream cOut = generator.open( theOut, bytes.length );
        cOut.write( bytes );
        cOut.close();
        theOut.close();
        return out.toByteArray();
    }
    catch ( Exception e )
    {
        throw new PGPException( "Error in encrypt", e );
    }
}

/**
 * Wraps with stream that outputs compressed data packet.
 */
protected OutputStream compress(OutputStream out, FileMetadata meta)
throws IOException, PGPException {
    if (log.isLoggable(Level.FINEST))
        log.finest("using compression algorithm " + compressionAlgorithm +
        " -" + compressionLevel);

    if (compressionAlgorithm == CompressionAlgorithm.Uncompressed ||
        compressionLevel < 1 || compressionLevel > 9)
        return null;

    int algo = compressionAlgorithm.ordinal();
    int level = compressionLevel;
    byte[] buf = getCompressionBuffer(meta);
    return new PGPCompressedDataGenerator(algo, level).open(out, buf);
}

@Test
public void testCompressDecompress() throws Exception {
  // Compress the data and write out a compressed data OpenPGP message.
  byte[] data;
  try (ByteArrayOutputStream output = new ByteArrayOutputStream()) {
    PGPCompressedDataGenerator kompressor = new PGPCompressedDataGenerator(ZIP);
    try (OutputStream output2 = kompressor.open(output)) {
      output2.write(FALL_OF_HYPERION_A_DREAM.getBytes(UTF_8));
    }
    data = output.toByteArray();
  }
  logger.info("Compressed data: " + dumpHex(data));

  // Decompress the data.
  try (ByteArrayInputStream input = new ByteArrayInputStream(data)) {
    PGPObjectFactory pgpFact = new BcPGPObjectFactory(input);
    PGPCompressedData object = (PGPCompressedData) pgpFact.nextObject();
    InputStream original = object.getDataStream();  // Closing this would close input.
    assertThat(CharStreams.toString(new InputStreamReader(original, UTF_8)))
        .isEqualTo(FALL_OF_HYPERION_A_DREAM);
    assertThat(pgpFact.nextObject()).isNull();
  }
}

private static byte[] compress(byte[] clearData, String fileName, int algorithm) throws IOException
{
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();
    PGPCompressedDataGenerator comData = new PGPCompressedDataGenerator(algorithm);
    OutputStream cos = comData.open(bOut); // open it with the final destination

    PGPLiteralDataGenerator lData = new PGPLiteralDataGenerator();

    // we want to generate compressed data. This might be a user option later,
    // in which case we would pass in bOut.
    OutputStream  pOut = lData.open(cos, // the compressed output stream
                                    PGPLiteralData.BINARY,
                                    fileName,  // "filename" to store
                                    clearData.length, // length of clear data
                                    new Date()  // current time
                                  );

    pOut.write(clearData);
    pOut.close();

    comData.close();

    return bOut.toByteArray();
}

private static byte[] compress(byte[] clearData, String fileName, int algorithm) throws IOException
{
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();
    PGPCompressedDataGenerator comData = new PGPCompressedDataGenerator(algorithm);
    OutputStream cos = comData.open(bOut); // open it with the final destination

    PGPLiteralDataGenerator lData = new PGPLiteralDataGenerator();

    // we want to generate compressed data. This might be a user option later,
    // in which case we would pass in bOut.
    OutputStream  pOut = lData.open(cos, // the compressed output stream
                                    PGPLiteralData.BINARY,
                                    fileName,  // "filename" to store
                                    clearData.length, // length of clear data
                                    new Date()  // current time
                                  );

    pOut.write(clearData);
    pOut.close();

    comData.close();

    return bOut.toByteArray();
}

private static byte[] compress(byte[] clearData, String fileName, int algorithm) throws IOException
{
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();
    PGPCompressedDataGenerator comData = new PGPCompressedDataGenerator(algorithm);
    OutputStream cos = comData.open(bOut); // open it with the final destination

    PGPLiteralDataGenerator lData = new PGPLiteralDataGenerator();

    // we want to generate compressed data. This might be a user option later,
    // in which case we would pass in bOut.
    OutputStream  pOut = lData.open(cos, // the compressed output stream
                                    PGPLiteralData.BINARY,
                                    fileName,  // "filename" to store
                                    clearData.length, // length of clear data
                                    new Date()  // current time
                                  );

    pOut.write(clearData);
    pOut.close();

    comData.close();

    return bOut.toByteArray();
}

static byte[] compressFile(String fileName, int algorithm) throws IOException
{
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();
    PGPCompressedDataGenerator comData = new PGPCompressedDataGenerator(algorithm);
    PGPUtil.writeFileToLiteralData(comData.open(bOut), PGPLiteralData.BINARY, new File(fileName));
    comData.close();
    return bOut.toByteArray();
}

/**
* Encrypt the given file 
* @param unencryptedFileName - Name of the unecrypted file
* @param encryptedFileName - Name of the encrypted file, will have .enc as extension
* @throws IOException 
* @throws NoSuchProviderException
* @throws PGPException
* @throws CryptDecryptException 
*/
  public void encryptFile(final String unencryptedFileName, final String encryptedFileName)
      throws IOException, NoSuchProviderException, PGPException, CryptDecryptException {
    if(enableDebugLog)Trace.logInfo("CryptDecryptUtil.encryptFile", "Entry");

    // Initialise PGP provider and read public key
    if(!initialized) initialise(false);

FileOutputStream encrytedFile = new FileOutputStream(encryptedFileName);

// Compress the input plain text file in ZIP format.
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();
      PGPCompressedDataGenerator comData = new PGPCompressedDataGenerator(PGPCompressedData.ZIP);
      PGPUtil.writeFileToLiteralData(comData.open(bOut), PGPLiteralData.BINARY, new File(unencryptedFileName) );
      comData.close();

      // Encrypt the file using Triple-DES algorithm
      BcPGPDataEncryptorBuilder dataEncryptor = new BcPGPDataEncryptorBuilder(PGPEncryptedData.TRIPLE_DES);
      dataEncryptor.setWithIntegrityPacket(false);
      dataEncryptor.setSecureRandom(new SecureRandom());
      PGPEncryptedDataGenerator encryptedDataGenerator = new PGPEncryptedDataGenerator(dataEncryptor);
      encryptedDataGenerator.addMethod(new BcPublicKeyKeyEncryptionMethodGenerator(publicKey));
      byte[] bytes = bOut.toByteArray();
      OutputStream cOut = encryptedDataGenerator.open(encrytedFile, bytes.length);
      cOut.write(bytes);
      cOut.close();
      encrytedFile.close();

      if(enableDebugLog)Trace.logInfo("CryptDecryptUtil.encryptFile", "Exit");
  }

private static OutputStream createDelegate(int bufferSize, OutputStream os) {
  try {
    return new PGPCompressedDataGenerator(ZIP).open(os, new byte[bufferSize]);
  } catch (IOException | PGPException e) {
    throw new RuntimeException(e);
  }
}

@Test
public void testExceptionDecryptorIncorrectInputFormatSymmetricEncryptedData() throws Exception {

    byte[] payload = "Not Correct Format".getBytes("UTF-8");
    ByteArrayOutputStream bos = new ByteArrayOutputStream();

    PGPEncryptedDataGenerator encGen = new PGPEncryptedDataGenerator(new JcePGPDataEncryptorBuilder(SymmetricKeyAlgorithmTags.CAST5)
            .setSecureRandom(new SecureRandom()).setProvider(getProvider()));

    encGen.addMethod(new JcePBEKeyEncryptionMethodGenerator("pw".toCharArray()));

    OutputStream encOut = encGen.open(bos, new byte[1024]);
    PGPCompressedDataGenerator comData = new PGPCompressedDataGenerator(CompressionAlgorithmTags.ZIP);
    OutputStream comOut = new BufferedOutputStream(comData.open(encOut));
    PGPLiteralDataGenerator litData = new PGPLiteralDataGenerator();
    OutputStream litOut = litData.open(comOut, PGPLiteralData.BINARY, PGPLiteralData.CONSOLE, new Date(), new byte[1024]);
    litOut.write(payload);
    litOut.flush();
    litOut.close();
    comOut.close();
    encOut.close();
    MockEndpoint mock = getMockEndpoint("mock:exception");
    mock.expectedMessageCount(1);
    template.sendBody("direct:subkeyUnmarshal", bos.toByteArray());
    assertMockEndpointsSatisfied();

    checkThrownException(mock, IllegalArgumentException.class, null, "The input message body has an invalid format.");
}

static byte[] compressFile(String fileName, int algorithm) throws IOException
{
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();
    PGPCompressedDataGenerator comData = new PGPCompressedDataGenerator(algorithm);
    PGPUtil.writeFileToLiteralData(comData.open(bOut), PGPLiteralData.BINARY,
        new File(fileName));
    comData.close();
    return bOut.toByteArray();
}

public String encryptString(PGPPublicKey key, String clearText)
        throws IOException, PGPException {

    byte[] clearData = clearText.getBytes(StandardCharsets.UTF_8);

    ByteArrayOutputStream encOut = new ByteArrayOutputStream();
    OutputStream out = new ArmoredOutputStream(encOut);
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();

    PGPCompressedDataGenerator comData = new PGPCompressedDataGenerator(
            PGPCompressedDataGenerator.ZIP);
    OutputStream cos = comData.open(bOut);
    PGPLiteralDataGenerator lData = new PGPLiteralDataGenerator();

    OutputStream pOut = lData.open(cos, PGPLiteralData.BINARY,
            PGPLiteralData.CONSOLE, clearData.length, new Date());
    pOut.write(clearData);

    lData.close();
    comData.close();

    PGPEncryptedDataGenerator encGen = new PGPEncryptedDataGenerator(
            new JcePGPDataEncryptorBuilder(PGPEncryptedData.CAST5)
                    .setWithIntegrityPacket(true)
                    .setSecureRandom(new SecureRandom()).setProvider(BouncyCastleProvider.PROVIDER_NAME));

    encGen.addMethod(new JcePublicKeyKeyEncryptionMethodGenerator(key)
            .setProvider(BouncyCastleProvider.PROVIDER_NAME));

    byte[] bytes = bOut.toByteArray();
    OutputStream cOut = encGen.open(out, bytes.length);
    cOut.write(bytes);
    cOut.close();
    out.close();

    return new String(encOut.toByteArray());
}

static byte[] compressFile(String fileName, int algorithm) throws IOException
{
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();
    PGPCompressedDataGenerator comData = new PGPCompressedDataGenerator(algorithm);
    PGPUtil.writeFileToLiteralData(comData.open(bOut), PGPLiteralData.BINARY,
        new File(fileName));
    comData.close();
    return bOut.toByteArray();
}

private void testCompression(
    int type)
    throws IOException, PGPException
{
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();
    PGPCompressedDataGenerator cPacket = new PGPCompressedDataGenerator(type);

    OutputStream out = cPacket.open(new UncloseableOutputStream(bOut));

    out.write("hello world!".getBytes());

    out.close();

    PGPObjectFactory pgpFact = new PGPObjectFactory(bOut.toByteArray());
    PGPCompressedData c1 = (PGPCompressedData)pgpFact.nextObject();
    InputStream pIn = c1.getDataStream();

    bOut.reset();

    int ch;
    while ((ch = pIn.read()) >= 0)
    {
        bOut.write(ch);
    }

    if (!areEqual(bOut.toByteArray(), "hello world!".getBytes()))
    {
        fail("compression test failed");
    }
}

static byte[] compressFile(String fileName, int algorithm) throws IOException
{
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();
    PGPCompressedDataGenerator comData = new PGPCompressedDataGenerator(algorithm);
    PGPUtil.writeFileToLiteralData(comData.open(bOut), PGPLiteralData.BINARY,
        new File(fileName));
    comData.close();
    return bOut.toByteArray();
}

private void testCompression(
    int type)
    throws IOException, PGPException
{
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();
    PGPCompressedDataGenerator cPacket = new PGPCompressedDataGenerator(type);

    OutputStream out = cPacket.open(new UncloseableOutputStream(bOut));

    out.write("hello world!".getBytes());

    out.close();

    PGPObjectFactory pgpFact = new PGPObjectFactory(bOut.toByteArray());
    PGPCompressedData c1 = (PGPCompressedData)pgpFact.nextObject();
    InputStream pIn = c1.getDataStream();

    bOut.reset();

    int ch;
    while ((ch = pIn.read()) >= 0)
    {
        bOut.write(ch);
    }

    if (!areEqual(bOut.toByteArray(), "hello world!".getBytes()))
    {
        fail("compression test failed");
    }
}

static byte[] compressFile(String fileName, int algorithm) throws IOException
{
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();
    PGPCompressedDataGenerator comData = new PGPCompressedDataGenerator(algorithm);
    PGPUtil.writeFileToLiteralData(comData.open(bOut), PGPLiteralData.BINARY,
        new File(fileName));
    comData.close();
    return bOut.toByteArray();
}

private void testCompression(
    int type)
    throws IOException, PGPException
{
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();
    PGPCompressedDataGenerator cPacket = new PGPCompressedDataGenerator(type);

    OutputStream out = cPacket.open(new UncloseableOutputStream(bOut));

    out.write("hello world!".getBytes());

    out.close();

    PGPObjectFactory pgpFact = new PGPObjectFactory(bOut.toByteArray());
    PGPCompressedData c1 = (PGPCompressedData)pgpFact.nextObject();
    InputStream pIn = c1.getDataStream();

    bOut.reset();

    int ch;
    while ((ch = pIn.read()) >= 0)
    {
        bOut.write(ch);
    }

    if (!areEqual(bOut.toByteArray(), "hello world!".getBytes()))
    {
        fail("compression test failed");
    }
}

public static byte[] signAndEncrypt( final byte[] message, final PGPSecretKey secretKey, final String secretPwd,
                                     final PGPPublicKey publicKey, final boolean armored ) throws PGPException
{
    try
    {
        final ByteArrayOutputStream out = new ByteArrayOutputStream();
        final PGPEncryptedDataGenerator encryptedDataGenerator = new PGPEncryptedDataGenerator(
                new JcePGPDataEncryptorBuilder( SymmetricKeyAlgorithmTags.AES_256 ).setWithIntegrityPacket( true )
                                                                                   .setSecureRandom(
                                                                                           new SecureRandom() )
                                                                                   .setProvider( provider ) );

        encryptedDataGenerator.addMethod(
                new JcePublicKeyKeyEncryptionMethodGenerator( publicKey ).setSecureRandom( new SecureRandom() )
                                                                         .setProvider( provider ) );

        final OutputStream theOut = armored ? new ArmoredOutputStream( out ) : out;
        final OutputStream encryptedOut = encryptedDataGenerator.open( theOut, new byte[4096] );

        final PGPCompressedDataGenerator compressedDataGenerator =
                new PGPCompressedDataGenerator( CompressionAlgorithmTags.ZIP );
        final OutputStream compressedOut = compressedDataGenerator.open( encryptedOut, new byte[4096] );
        final PGPPrivateKey privateKey = secretKey.extractPrivateKey(
                new JcePBESecretKeyDecryptorBuilder().setProvider( provider ).build( secretPwd.toCharArray() ) );
        final PGPSignatureGenerator signatureGenerator = new PGPSignatureGenerator(
                new JcaPGPContentSignerBuilder( secretKey.getPublicKey().getAlgorithm(), HashAlgorithmTags.SHA1 )
                        .setProvider( provider ) );
        signatureGenerator.init( PGPSignature.BINARY_DOCUMENT, privateKey );
        final Iterator<?> it = secretKey.getPublicKey().getUserIDs();
        if ( it.hasNext() )
        {
            final PGPSignatureSubpacketGenerator spGen = new PGPSignatureSubpacketGenerator();
            spGen.setSignerUserID( false, ( String ) it.next() );
            signatureGenerator.setHashedSubpackets( spGen.generate() );
        }
        signatureGenerator.generateOnePassVersion( false ).encode( compressedOut );
        final PGPLiteralDataGenerator literalDataGenerator = new PGPLiteralDataGenerator();
        final OutputStream literalOut = literalDataGenerator
                .open( compressedOut, PGPLiteralData.BINARY, "filename", new Date(), new byte[4096] );
        final InputStream in = new ByteArrayInputStream( message );
        final byte[] buf = new byte[4096];
        for ( int len; ( len = in.read( buf ) ) > 0; )
        {
            literalOut.write( buf, 0, len );
            signatureGenerator.update( buf, 0, len );
        }
        in.close();
        literalDataGenerator.close();
        signatureGenerator.generate().encode( compressedOut );
        compressedDataGenerator.close();
        encryptedDataGenerator.close();
        theOut.close();
        return out.toByteArray();
    }
    catch ( Exception e )
    {
        throw new PGPException( "Error in signAndEncrypt", e );
    }
}

public static byte[] sign( byte[] message, PGPSecretKey secretKey, String secretPwd, boolean armor )
        throws PGPException
{
    try
    {
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        OutputStream theOut = armor ? new ArmoredOutputStream( out ) : out;

        PGPPrivateKey pgpPrivKey = secretKey.extractPrivateKey(
                new JcePBESecretKeyDecryptorBuilder().setProvider( provider ).build( secretPwd.toCharArray() ) );
        PGPSignatureGenerator sGen = new PGPSignatureGenerator(
                new JcaPGPContentSignerBuilder( secretKey.getPublicKey().getAlgorithm(), PGPUtil.SHA1 )
                        .setProvider( provider ) );

        sGen.init( PGPSignature.BINARY_DOCUMENT, pgpPrivKey );

        Iterator it = secretKey.getPublicKey().getUserIDs();
        if ( it.hasNext() )
        {
            PGPSignatureSubpacketGenerator spGen = new PGPSignatureSubpacketGenerator();

            spGen.setSignerUserID( false, ( String ) it.next() );
            sGen.setHashedSubpackets( spGen.generate() );
        }

        PGPCompressedDataGenerator cGen = new PGPCompressedDataGenerator( PGPCompressedData.ZLIB );

        BCPGOutputStream bOut = new BCPGOutputStream( cGen.open( theOut ) );

        sGen.generateOnePassVersion( false ).encode( bOut );

        PGPLiteralDataGenerator lGen = new PGPLiteralDataGenerator();
        OutputStream lOut =
                lGen.open( bOut, PGPLiteralData.BINARY, "filename", new Date(), new byte[4096] );         //
        InputStream fIn = new ByteArrayInputStream( message );
        int ch;

        while ( ( ch = fIn.read() ) >= 0 )
        {
            lOut.write( ch );
            sGen.update( ( byte ) ch );
        }

        lGen.close();

        sGen.generate().encode( bOut );

        cGen.close();

        theOut.close();

        return out.toByteArray();
    }
    catch ( Exception e )
    {
        throw new PGPException( "Error in sign", e );
    }
}

public static byte[] sign( byte data[], PGPPrivateKey privateKey ) throws IOException, PGPException
{
    ByteArrayOutputStream bos = new ByteArrayOutputStream();

    ArmoredOutputStream aos = new ArmoredOutputStream( bos );

    PGPCompressedDataGenerator compressGen = new PGPCompressedDataGenerator( PGPCompressedData.ZLIB );

    BCPGOutputStream bcOut = new BCPGOutputStream( compressGen.open( aos ) );

    PGPSignatureGenerator signGen = getSignatureGenerator( privateKey, bcOut );

    produceSign( data, bcOut, signGen );

    compressGen.close();

    aos.close();

    return bos.toByteArray();
}

private static byte[] compress( byte data[] ) throws IOException
{
    PGPCompressedDataGenerator compressGen = new PGPCompressedDataGenerator( CompressionAlgorithmTags.ZIP );

    ByteArrayOutputStream bos = new ByteArrayOutputStream();

    OutputStream compressOut = compressGen.open( bos );

    OutputStream os =
            new PGPLiteralDataGenerator().open( compressOut, PGPLiteralData.BINARY, "", data.length, new Date() );

    os.write( data );

    os.close();

    compressGen.close();

    return bos.toByteArray();
}

public static byte[] signFile(byte[] content, String fileName, InputStream keyIn,
        char[] pass, Provider securityProvider, TimeProvider timeProvider) throws IOException, NoSuchAlgorithmException,
        NoSuchProviderException, PGPException, SignatureException {

    ByteArrayOutputStream byteArrayOut = new ByteArrayOutputStream();
    ArmoredOutputStream armoredOut = new ArmoredOutputStream(byteArrayOut);
    PGPLiteralDataGenerator literalDataGenerator = new PGPLiteralDataGenerator();
    PGPCompressedDataGenerator compressedDataGenerator = new PGPCompressedDataGenerator(PGPCompressedData.ZLIB);

    try {
        PGPSecretKey pgpSecretKey = BouncyCastlePGPExampleUtil.readSecretKey(keyIn);
        PGPPrivateKey pgpPrivateKey = pgpSecretKey.extractPrivateKey(pass, securityProvider);
        PGPSignatureGenerator signatureGenerator = new PGPSignatureGenerator(pgpSecretKey
                .getPublicKey().getAlgorithm(), PGPUtil.SHA1, securityProvider);

        signatureGenerator.initSign(PGPSignature.BINARY_DOCUMENT, pgpPrivateKey);

        Iterator<?> it = pgpSecretKey.getPublicKey().getUserIDs();
        if (it.hasNext()) { //get first user ID
            PGPSignatureSubpacketGenerator spGen = new PGPSignatureSubpacketGenerator();

            spGen.setSignerUserID(false, (String) it.next());
            signatureGenerator.setHashedSubpackets(spGen.generate());
        } else {
            throw new PGPException("No user ID found in the public key of the certificate.");
        }


        BCPGOutputStream bOut = new BCPGOutputStream(compressedDataGenerator.open(armoredOut));

        signatureGenerator.generateOnePassVersion(false).encode(bOut);

        OutputStream literalOut = literalDataGenerator.open(bOut, PGPLiteralData.BINARY, fileName, timeProvider.nowDate(), content);

        literalOut.write(content);
        signatureGenerator.update(content);

        signatureGenerator.generate().encode(bOut);

    } finally {
        literalDataGenerator.close();
        compressedDataGenerator.close();
        armoredOut.close();
    }

    return byteArrayOut.toByteArray();
}

private PGPCompressedDataGenerator createCompressedDataGenerator() {
    return new PGPCompressedDataGenerator(getCompressionAlgorithm().getCompressionAlgorithmTag());
}

public void run(final char[] passphrase, final InputStream inputStream, final OutputStream outputStream) throws IOException, CryptoException {
  try {
    final OutputStream armor = new ArmoredOutputStream(outputStream);

    final PGPEncryptedDataGenerator encryptedDataGenerator = new PGPEncryptedDataGenerator(new JcePGPDataEncryptorBuilder(
        SymmetricKeyAlgorithmTags.AES_128).setWithIntegrityPacket(true).setSecureRandom(new SecureRandom()).setProvider(new BouncyCastleProvider()));
    encryptedDataGenerator.addMethod(new JcePublicKeyKeyEncryptionMethodGenerator(publicKey).setSecureRandom(new SecureRandom()).setProvider(
        new BouncyCastleProvider()));

    final OutputStream encryptedOut = encryptedDataGenerator.open(armor, new byte[4096]);

    final PGPCompressedDataGenerator compressedDataGenerator = new PGPCompressedDataGenerator(CompressionAlgorithmTags.ZIP);
    final OutputStream compressedOut = compressedDataGenerator.open(encryptedOut, new byte[4096]);

    final PGPPrivateKey privateKey = secretKey.extractPrivateKey(new JcePBESecretKeyDecryptorBuilder().setProvider(new BouncyCastleProvider())
        .build(passphrase));

    final PGPSignatureGenerator signatureGenerator = new PGPSignatureGenerator(new JcaPGPContentSignerBuilder(secretKey.getPublicKey()
        .getAlgorithm(), HashAlgorithmTags.SHA1).setProvider(new BouncyCastleProvider()));
    signatureGenerator.init(PGPSignature.BINARY_DOCUMENT, privateKey);
    final Iterator<?> it = secretKey.getPublicKey().getUserIDs();
    if (it.hasNext()) {
      final PGPSignatureSubpacketGenerator spGen = new PGPSignatureSubpacketGenerator();
      spGen.setSignerUserID(false, (String) it.next());
      signatureGenerator.setHashedSubpackets(spGen.generate());
    }
    signatureGenerator.generateOnePassVersion(false).encode(compressedOut);

    final PGPLiteralDataGenerator literalDataGenerator = new PGPLiteralDataGenerator();
    final OutputStream literalOut = literalDataGenerator.open(compressedOut, PGPLiteralData.BINARY, "", new Date(), new byte[4096]);
    final byte[] buf = new byte[4096];
    for (int len = 0; (len = inputStream.read(buf)) > 0;) {
      literalOut.write(buf, 0, len);
      signatureGenerator.update(buf, 0, len);
    }
    literalDataGenerator.close();
    signatureGenerator.generate().encode(compressedOut);
    compressedDataGenerator.close();
    encryptedDataGenerator.close();
    armor.close();
  }
  catch (final Exception e) {
    throw new CryptoException(e);
  }

}

/**
 * Encrypt, sign and write input stream data to output stream.
 * Input and output stream are closed.
 */
private static void encryptAndSign(
        InputStream plainInput, OutputStream encryptedOutput,
        PersonalKey myKey, List<PGPUtils.PGPCoderKey> receiverKeys)
        throws IOException, PGPException {

    // setup data encryptor & generator
    BcPGPDataEncryptorBuilder encryptor = new BcPGPDataEncryptorBuilder(PGPEncryptedData.AES_192);
    encryptor.setWithIntegrityPacket(true);
    encryptor.setSecureRandom(new SecureRandom());

    // add public key recipients
    PGPEncryptedDataGenerator encGen = new PGPEncryptedDataGenerator(encryptor);
    receiverKeys.forEach(key ->
        encGen.addMethod(new BcPublicKeyKeyEncryptionMethodGenerator(key.encryptKey)));

    OutputStream encryptedOut = encGen.open(encryptedOutput, new byte[BUFFER_SIZE]);

    // setup compressed data generator
    PGPCompressedDataGenerator compGen = new PGPCompressedDataGenerator(PGPCompressedData.ZIP);
    OutputStream compressedOut = compGen.open(encryptedOut, new byte[BUFFER_SIZE]);

    // setup signature generator
    int algo = myKey.getSigningAlgorithm();
    PGPSignatureGenerator sigGen = new PGPSignatureGenerator(
            new BcPGPContentSignerBuilder(algo, HashAlgorithmTags.SHA256));
    sigGen.init(PGPSignature.BINARY_DOCUMENT, myKey.getPrivateSigningKey());

    PGPSignatureSubpacketGenerator spGen = new PGPSignatureSubpacketGenerator();
    spGen.setSignerUserID(false, myKey.getUserId());
    sigGen.setUnhashedSubpackets(spGen.generate());

    sigGen.generateOnePassVersion(false).encode(compressedOut);

    // Initialize literal data generator
    PGPLiteralDataGenerator literalGen = new PGPLiteralDataGenerator();
    OutputStream literalOut = literalGen.open(
        compressedOut,
        PGPLiteralData.BINARY,
        "",
        new Date(),
        new byte[BUFFER_SIZE]);

    // read the "in" stream, compress, encrypt and write to the "out" stream
    // this must be done if clear data is bigger than the buffer size
    // but there are other ways to optimize...
    byte[] buf = new byte[BUFFER_SIZE];
    int len;
    while ((len = plainInput.read(buf)) > 0) {
        literalOut.write(buf, 0, len);
        sigGen.update(buf, 0, len);
    }

    literalGen.close();

    // generate the signature, compress, encrypt and write to the "out" stream
    sigGen.generate().encode(compressedOut);
    compGen.close();
    encGen.close();
}

/**
 * Opens a new {@link Compressor} (Writing Step 2/3)
 *
 * <p>This is the second step in creating a ghostryde file. After this method, you'll want to
 * call {@link #openOutput(Compressor, String, DateTime)}.
 *
 * @param os is the value returned by {@link #openEncryptor(OutputStream, PGPPublicKey)}.
 * @throws IOException
 * @throws PGPException
 */
@CheckReturnValue
public Compressor openCompressor(@WillNotClose Encryptor os) throws IOException, PGPException {
  PGPCompressedDataGenerator kompressor = new PGPCompressedDataGenerator(COMPRESSION_ALGORITHM);
  return new Compressor(kompressor.open(os, new byte[bufferSize]));
}