switch ( type ) {
        case KerberosConstants.DES_ENC_TYPE:
            decrypt = decryptDES(data, key, cipher);
            break;
        case KerberosConstants.RC4_ENC_TYPE:
            decrypt = decryptRC4(data, key);
            break;
        default:
            throw new GeneralSecurityException("Unsupported encryption type " + type);
        }
        return decrypt;
    }


    /**