private function _getCA($id)
{
$url = E3_PROV_URL_TRUSTSTORE . '/certs/' . rawurlencode($id);
$reply = $this->restClient->makeCall($url, "GET");
$xml = simplexml_load_string($reply->getPayload());
if ($reply->getHTTPCode() === "200") {
$cert = Cert::fromXML($xml->cert);
// get certificate expiration date
$content = (string) $xml->cert->content;
$ts = $this->parseCertificateExpirationDate($content);
if ($ts) {
$cert->setExpirationDate($ts);
}
return $cert;
} else {
throw new Exception(!empty($xml->error) ? $xml->error->errorText : UNDEFINED_ERROR_TEXT);
}
}
