Auth_OpenID_Signatory::sign PHP Метод

    function sign($response)
    {
        $signed_response = $response;
        $assoc_handle = $response->request->assoc_handle;
        if ($assoc_handle) {
            // normal mode
            $assoc = $this->getAssociation($assoc_handle, false, false);
            if (!$assoc || $assoc->getExpiresIn() <= 0) {
                // fall back to dumb mode
                $signed_response->fields->setArg(Auth_OpenID_OPENID_NS, 'invalidate_handle', $assoc_handle);
                $assoc_type = $assoc ? $assoc->assoc_type : 'HMAC-SHA1';
                if ($assoc && $assoc->getExpiresIn() <= 0) {
                    $this->invalidate($assoc_handle, false);
                }
                $assoc = $this->createAssociation(true, $assoc_type);
            }
        } else {
            // dumb mode.
            $assoc = $this->createAssociation(true);
        }
        $signed_response->fields = $assoc->signMessage($signed_response->fields);
        return $signed_response;
    }