private function getCrumbVaue()
{
foreach ($this->jar->toArray() as $cookie) {
if (strtolower($cookie['Name']) === 'crumb') {
return $cookie['Value'];
}
}
}
/**
* Proxy authenticates to a target service.
*
* Returns cookies from the proxied service in a
* CookieJar object for use when later accessing resources.
*
* @param string $target_service
* The service to be proxied.
*
* @return \GuzzleHttp\Cookie\CookieJar
* A CookieJar object (array storage) containing cookies from the
* proxied service.
*
* @throws CasProxyException
*/
public function proxyAuthenticate($target_service)
{
// Check to see if we have proxied this application already.
if (isset($_SESSION['cas_proxy_helper'][$target_service])) {
$cookies = array();
foreach ($_SESSION['cas_proxy_helper'][$target_service] as $cookie) {
$cookies[$cookie['Name']] = $cookie['Value'];
}
$domain = $cookie['Domain'];
$jar = CookieJar::fromArray($cookies, $domain);
$this->casHelper->log("{$target_service} already proxied. Returning information from session.");
return $jar;
}
if (!($this->casHelper->isProxy() && isset($_SESSION['cas_pgt']))) {
// We can't perform proxy authentication in this state.
throw new CasProxyException("Session state not sufficient for proxying.");
}
// Make request to CAS server to retrieve a proxy ticket for this service.
$cas_url = $this->getServerProxyURL($target_service);
try {
$this->casHelper->log("Retrieving proxy ticket from: {$cas_url}");
$response = $this->httpClient->get($cas_url);
$this->casHelper->log("Received: " . htmlspecialchars($response->getBody()->__toString()));
} catch (ClientException $e) {
throw new CasProxyException($e->getMessage());
}
$proxy_ticket = $this->parseProxyTicket($response->getBody());
$this->casHelper->log("Extracted proxy ticket: {$proxy_ticket}");
// Make request to target service with our new proxy ticket.
// The target service will validate this ticket against the CAS server
// and set a cookie that grants authentication for further resource calls.
$params['ticket'] = $proxy_ticket;
$service_url = $target_service . "?" . UrlHelper::buildQuery($params);
$cookie_jar = new CookieJar();
try {
$this->casHelper->log("Contacting service: {$service_url}");
$this->httpClient->get($service_url, ['cookies' => $cookie_jar]);
} catch (ClientException $e) {
throw new CasProxyException($e->getMessage());
}
// Store in session storage for later reuse.
$_SESSION['cas_proxy_helper'][$target_service] = $cookie_jar->toArray();
$this->casHelper->log("Stored cookies from {$target_service} in session.");
return $cookie_jar;
}
/**
* @param CookieJar $cookieJar
*
* @return string
*/
public function serializeCookies(CookieJar $cookieJar)
{
return serialize($cookieJar->toArray());
}
