def METHOD_NAME(self, pemData):
    """load the Request and key argument from a PEM encoded string.
    :param pemData: PEN encoded string containing Request and PKey
    :returns: S_OK()
    """
    if not isinstance(pemData, bytes):
        pemData = pemData.encode("ascii")
    try:
        self.__reqObj = M2Crypto.X509.load_request_string(pemData)
    except Exception as e:
        return S_ERROR(DErrno.ENOCERT, str(e))
    try:
        self.__pkeyObj = M2Crypto.EVP.load_key_string(pemData)
    except Exception as e:
        return S_ERROR(DErrno.ENOPKEY, str(e))
    self.__valid = True
    return S_OK()