DES解密的一个步骤，Java的，找高手帮转

 public byte[] getkey(string keycript)
        {
            byte[] decrypted;
            byte[] mackey = fromHexString(keycript);
            byte[] rawKeyData =  fromHexString("3425342AE4DF3431");
            SecureRandom sr = new SecureRandom();
            DESKeySpec dks = new DESKeySpec(rawKeyData);
            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
            SecretKey key = keyFactory.generateSecret(dks);
            Cipher cipher = Cipher.getInstance("DES/ECB/NoPadding");
            cipher.init(Cipher.DECRYPT_MODE, key, sr);
            decrypted = cipher.doFinal(mackey);
            return decrypted;
        }