}


    /**
     * @param key
     *            7 or 8 byte DES key
     * @return DES cipher in encryption mode
     */
    public static Cipher getDES ( byte[] key ) {
        if ( key.length == 7 ) {
            return getDES(des7to8(key));
        }

        try {
            Cipher c = Cipher.getInstance("DES/ECB/NoPadding");
            c.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(key, "DES"));

        byte[] key7 = new byte[7];
        byte[] e8 = new byte[8];

        for ( int i = 0; i < key.length / 7; i++ ) {
            System.arraycopy(key, i * 7, key7, 0, 7);
            Cipher des = Crypto.getDES(key7);
            des.update(data, 0, data.length, e8);
            System.arraycopy(e8, 0, e, i * 8, 8);
        }
    }