How to use

close

method

in

javax.crypto.CipherOutputStream

 @Override
 public void close()
   throws IOException {
  encryptedStream.close();

  @Override
  public void close()
      throws IOException {
    Hessian2Output out = _out;
    _out = null;
    if (out != null) {
      _cipherOut.close();
      _bodyOut.close();
      out.writeInt(0);
      out.completeEnvelope();
      out.close();

 static void encrypt() throws IOException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException {
  // Here you read the cleartext.
  FileInputStream fis = new FileInputStream("data/cleartext");
  // This stream write the encrypted text. This stream will be wrapped by another stream.
  FileOutputStream fos = new FileOutputStream("data/encrypted");
  // Length is 16 byte
  // Careful when taking user input!!! http://stackoverflow.com/a/3452620/1188357
  SecretKeySpec sks = new SecretKeySpec("MyDifficultPassw".getBytes(), "AES");
  // Create cipher
  Cipher cipher = Cipher.getInstance("AES");
  cipher.init(Cipher.ENCRYPT_MODE, sks);
  // Wrap the output stream
  CipherOutputStream cos = new CipherOutputStream(fos, cipher);
  // Write bytes
  int b;
  byte[] d = new byte[8];
  while((b = fis.read(d)) != -1) {
    cos.write(d, 0, b);
  // Flush and close streams.
  cos.flush();
  cos.close();
  fis.close();

cipherOutputStream.close();
cipherOutputStream = null;

private static byte[] encryptWithAesGcm(byte[] plaintext, byte[] randomKeyBytes, byte[] randomIvBytes) throws IOException, InvalidKeyException,
    InvalidAlgorithmParameterException, NoSuchAlgorithmException, NoSuchProviderException, NoSuchPaddingException {
  SecretKey randomKey = new SecretKeySpec(randomKeyBytes, "AES");
  Cipher cipher = Cipher.getInstance("AES/GCM/NoPadding", "BC");
  cipher.init(Cipher.ENCRYPT_MODE, randomKey, new IvParameterSpec(randomIvBytes));
  ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
  CipherOutputStream cipherOutputStream = new CipherOutputStream(byteArrayOutputStream, cipher);
  cipherOutputStream.write(plaintext);
  cipherOutputStream.close();
  return byteArrayOutputStream.toByteArray();

    




    
new FileOutputStream(encryptedDataFilePath), inCipher);
cipherOutputStream.write(plainText.getBytes("UTF-8"));
cipherOutputStream.close();

CipherOutputStream cos = new CipherOutputStream(fos2, ciEnc);
IOUtils.copy(zis, cos);
cos.close();
fos2.close();
zos.closeArchiveEntry();

outputStream.close();
if ( cipherOutputStream != null ) {
 cipherOutputStream.close();

FileOutputStream fos = null;
 CipherOutputStream cos = null;
 FileInputStream fis = null;
 try {
   fis = new FileInputStream(inputFile);
   fos = new FileOutputStream(outputFile);
   cos = new CipherOutputStream(fos, cipher);
   // once cos wraps the fos, you should set it to null
   fos = null;
 } finally {
   if (cos != null) {
     cos.close();
   if (fos != null) {
     fos.close();
   if (fis != null) {
     fis.close();

private




    
 static byte[] encryptBlocks(final byte[] data, final Cipher cipher, final int dataSize) throws IOException {
  final ByteArrayOutputStream bos = new ByteArrayOutputStream(data.length);
  final int count                 = (data.length / dataSize) + 1;
  int remaining                   = data.length;
  for (int i=0; i<count; i++) {
    final int offset = i*dataSize;
    final int length = Math.min(dataSize, remaining);
    final CipherOutputStream cos = new CipherOutputStream(bos, cipher);
    cos.write(data, offset, length);
    cos.flush();
    cos.close();
    remaining -= length;
  return bos.toByteArray();

    cos.flush();
cos.close();

@SuppressWarnings("PMD.UnusedPrivateMethod") // false positive
private static <T> void saveEncryptedJsonToFile(String fileName, T object, Type typeOfObject) throws Exception {
  SecretKeySpec sks = new SecretKeySpec(StringHelper.hexStringToByteArray(Config.ENCRYPTION_KEY), "AES");
  Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
  cipher.init(Cipher.ENCRYPT_MODE, sks, cipher.getParameters());
  try (OutputStream os = Files.newOutputStream(Paths.get(fileName))) {
    CipherOutputStream out = new CipherOutputStream(os, cipher);
    JsonWriter writer = new JsonWriter(new OutputStreamWriter(out));
    getSerializer().toJson(object, typeOfObject, writer);
    writer.close();
    out.close();

  public void close() throws IOException {
    if (!closed) {
      super.close();
      closed = true;

  public void close() throws IOException {
    if (!cosClosed) {
      super.close();
      cosClosed = true;

  




    
public void close() throws IOException {
    if (!closed) {
      super.close();
      closed = true;

  




    
public void close() throws IOException {
    if (!cosClosed) {
      super.close();
      cosClosed = true;

  public void close() throws IOException {
    if (!closed) {
      super.close();
      closed = true;

  public void close() throws IOException {
    if (!closed) {
      super.close();
      closed = true;

  public void close() throws IOException {
    if (!closed) {
      super.close();
      closed = true;

 @Override
 public void close()
   throws IOException {
  encryptedStream.close();