'Extract the nonce from an OpenID 1 response.  Return the
nonce from the BARE_NS since we independently check the
return_to arguments are the same as those in the response
message.
See the openid1_nonce_query_arg_name class variable
@returns: The nonce as a string or None'

def _idResGetNonceOpenID1(self, message, endpoint):

    return message.getArg(BARE_NS, self.openid1_nonce_query_arg_name)
