Decrypt AES256 encrypted file and save it in the phone

Question

I'm downloading a file that is stored on a remote server, I try to decrypt it using JNCryptor, and all goes well except that the file I have downloaded and store in the phone external storage is corrupted and I cannot open it. Can anyone tell me where im going wrong?

Im trying to get the InputStream from the file, decrypt it, and save the file on external storage.

Thanks

Here is my code:

private void downloadFile() {
        final String FILE_URL = "https://www.google.com";
        final String PASS = "password";


        new AsyncTask<Void, Void, Void>() {
            @Override
            protected Void doInBackground(Void... voids) {
                Log.d(TAG, "starting");


                JNCryptor cryptor = new AES256JNCryptor();

                int count;
                try {
                    URL url = new URL(FILE_URL);
                    URLConnection conection = url.openConnection();
                    conection.connect();

                    // this will be useful so that you can show a tipical 0-100%
                    // progress bar
                    int lenghtOfFile = conection.getContentLength();
                    // download the file
                    InputStream input = new BufferedInputStream(url.openStream(),
                            8192);

                    //decrypt istream
                    byte[] b = null;
                    byte[] data = null;
                    try {
                        b = new byte[input.available()];
                        input.read(b);
                    } catch (IOException e) {
                        Log.i("decrypt error", e.toString());
                    }

                    AES256JNCryptorOutputStream cryptorStream = null;

                    ByteArrayOutputStream byteStream = new ByteArrayOutputStream();

                    try {
                        cryptorStream = new AES256JNCryptorOutputStream(byteStream,
                                PASS.toCharArray());

                    } catch (CryptorException e) {
                        e.printStackTrace();
                    }

                    try {
                        cryptorStream.write(b);
                        cryptorStream.flush();
                        cryptorStream.close();
                    } catch (IOException e1) {
                        e1.printStackTrace();
                    }

                    byte[] encrypted = byteStream.toByteArray();

                    try {
                        data = cryptor.decryptData(encrypted, PASS.toCharArray());
                        Log.d(TAG, "decrypted");
                    } catch (InvalidHMACException e) {
                        e.printStackTrace();
                    } catch (CryptorException e) {
                        e.printStackTrace();
                    }

                    if (data != null) {
                        Log.d(TAG, "data is ok");
                    }

                    //end decryption

                    // Output stream
                    //test
                    FileOutputStream fos = new FileOutputStream(Environment
                            .getExternalStorageDirectory().toString()
                            + "/temp.zip");
                    fos.write(data);
                    fos.close();
                    Log.d(TAG, "file saved ");

                    input.close();
                    Log.d(TAG, "done");
                } catch (Exception e) {
                    Log.d(TAG, "Error: " + e.getMessage());
                }
                return null;
            }


        }.execute();

    }

P.S. Im not getting any error or warning in logCat.