/**
* Sign an {@link Auth_OpenID_ServerResponse} and return an
* {@link Auth_OpenID_WebResponse}.
*/
function encode(&$response)
{
// the isinstance is a bit of a kludge... it means there isn't
// really an adapter to make the interfaces quite match.
if (!is_a($response, 'Auth_OpenID_ServerError') &&
$response->needsSigning()) {
if (!$this->signatory) {
return new Auth_OpenID_ServerError(null,
"Must have a store to sign request");
}
if ($response->fields->hasKey(Auth_OpenID_OPENID_NS, 'sig')) {
return new Auth_OpenID_AlreadySigned($response);
}
$response = $this->signatory->sign($response);
}
return parent::encode($response);
}
