private void getKey() throws Exception {
    String keyFile = Readline.readline("Key file: ");
    try {
	FileInputStream fis = new FileInputStream(keyFile.trim());
	ObjectInputStream ois = new ObjectInputStream(fis);
	iKey = (Key) ois.readObject();
	ois.close();
    } catch (FileNotFoundException e) {
	System.out.println("Creating key");
	long start = System.currentTimeMillis();
	KeyGenerator gen = KeyGenerator.getInstance(iAlgo);
	gen.init(new SecureRandom());
	iKey = gen.generateKey();
	long end = System.currentTimeMillis();
	System.out.println("...done. Elapsed time: " + (end-start) + " ms");
	FileOutputStream fos = new FileOutputStream(keyFile);
	ObjectOutputStream oos = new ObjectOutputStream(fos);
	oos.writeObject(iKey);
	oos.close();
    }
}

private void getCipher() throws Exception {
    iCipher = Cipher.getInstance(iAlgo+iMode);
    if (iEncrypt)
	iCipher.init(Cipher.ENCRYPT_MODE,iKey);
    else
	iCipher.init(Cipher.DECRYPT_MODE,iKey);
}

private void runCipher() throws Exception {
    FileOutputStream fos = new FileOutputStream(iOutFile);
    CipherOutputStream cos = new CipherOutputStream(fos,iCipher);
    FileInputStream stream = new FileInputStream(iInFile);
    byte[] sbuf = new byte[BUF_SIZE];
    int length;
    System.out.println("Encrypting/Decrypting ");
    long start = System.currentTimeMillis();
    while ((length=stream.read(sbuf)) != -1)
	cos.write(sbuf,0,length);
    stream.close();
    cos.close();
    long end = System.currentTimeMillis();
    System.out.println("... done.Elapsed time: " + (end-start) + " ms");
}