Decryption routines from the Tosiok samples

decryption_routines.java

    
       private static void decryptFile(InputStream in, String destFilePath) throws Exception {
        File destFile = new File(destFilePath);
        if (in != null) {
            if (!destFile.getParentFile().exists()) {
                destFile.getParentFile().mkdirs();
            }
            destFile.createNewFile();
            FileOutputStream out = new FileOutputStream(destFile);
            SecretKeySpec secretKeySpec = new SecretKeySpec(new SecretKeySpec(Base64.decode("GiEhjghmZIO7RTWyycQ9PQ=="), "AES").getEncoded(), "AES");
            Cipher cipher = Cipher.getInstance("AES");
            cipher.init(2, secretKeySpec);
            CipherOutputStream cout = new CipherOutputStream(out, cipher);
            byte[] cache = new byte[1024];
            int index = 0;
            while (true) {
                int nRead = in.read(cache);
                if (nRead == -1) {
                    cout.close();
                    out.close();
                    in.close();
                    return;
                }
                cout.write(cache, 0, nRead);
                cout.flush();
                index++;
            }
        }
    }