Auth_OpenID_GenericConsumer::_idResCheckNonce PHP Method

    function _idResCheckNonce($message, $endpoint)
    {
        if ($message->isOpenID1()) {
            // This indicates that the nonce was generated by the consumer
            $nonce = $this->_idResGetNonceOpenID1($message, $endpoint);
            $server_url = '';
        } else {
            $nonce = $message->getArg(Auth_OpenID_OPENID2_NS, 'response_nonce');
            $server_url = $endpoint->server_url;
        }
        if ($nonce === null) {
            return new Auth_OpenID_FailureResponse($endpoint, "Nonce missing from response");
        }
        $parts = Auth_OpenID_splitNonce($nonce);
        if ($parts === null) {
            return new Auth_OpenID_FailureResponse($endpoint, "Malformed nonce in response");
        }
        list($timestamp, $salt) = $parts;
        if (!$this->store->useNonce($server_url, $timestamp, $salt)) {
            return new Auth_OpenID_FailureResponse($endpoint, "Nonce already used or out of range");
        }
        return null;
    }