/**
* Validation of a service ticket for Version 2 of the CAS protocol.
*
* @param string $data
* The raw validation response data from CAS server.
*
* @return array
* An array containing validation result data from the CAS server.
* @throws CasValidateException
*/
private function validateVersion2($data)
{
$dom = new \DOMDocument();
$dom->preserveWhiteSpace = FALSE;
$dom->encoding = "utf-8";
// Suppress errors from this function, as we intend to throw our own
// exception.
if (@$dom->loadXML($data) === FALSE) {
throw new CasValidateException("XML from CAS server is not valid.");
}
$failure_elements = $dom->getElementsByTagName('authenticationFailure');
if ($failure_elements->length > 0) {
// Failed validation, extract the message and toss exception.
$failure_element = $failure_elements->item(0);
$error_code = $failure_element->getAttribute('code');
$error_msg = $failure_element->nodeValue;
throw new CasValidateException("Error Code " . trim($error_code) . ": " . trim($error_msg));
}
$success_elements = $dom->getElementsByTagName("authenticationSuccess");
if ($success_elements->length === 0) {
// All responses should have either an authenticationFailure
// or authenticationSuccess node.
throw new CasValidateException("XML from CAS server is not valid.");
}
// There should only be one success element, grab it and extract username.
$success_element = $success_elements->item(0);
$user_element = $success_element->getElementsByTagName("user");
if ($user_element->length == 0) {
throw new CasValidateException("No user found in ticket validation response.");
}
$username = $user_element->item(0)->nodeValue;
$this->casHelper->log("Extracted user: {$username}");
$property_bag = new CasPropertyBag($username);
// If the server provided any attributes, parse them out into the property
// bag.
$attribute_elements = $dom->getElementsByTagName("attributes");
if ($attribute_elements->length > 0) {
$property_bag->setAttributes($this->parseAttributes($attribute_elements));
}
// Look for a proxy chain, and if it exists, validate it against config.
$proxy_chain = $success_element->getElementsByTagName("proxy");
if ($this->casHelper->canBeProxied() && $proxy_chain->length > 0) {
$this->verifyProxyChain($proxy_chain);
}
if ($this->casHelper->isProxy()) {
// Extract the PGTIOU from the XML.
$pgt_element = $success_element->getElementsByTagName("proxyGrantingTicket");
if ($pgt_element->length == 0) {
throw new CasValidateException("Proxy initialized, but no PGTIOU provided in response.");
}
$pgt = $pgt_element->item(0)->nodeValue;
$this->casHelper->log("Extracted PGT: {$pgt}");
$property_bag->setPgt($pgt);
}
return $property_bag;
}
/**
* Test getting the 'can be proxied' configuration.
*
* @covers ::canBeProxied
* @covers ::__construct
*/
public function testCanBeProxied()
{
$config_factory = $this->getConfigFactoryStub(array('cas.settings' => array('server.hostname' => 'example.com', 'server.port' => 443, 'server.path' => '/cas', 'proxy.can_be_proxied' => TRUE)));
$cas_helper = new CasHelper($config_factory, $this->urlGenerator, $this->connection, $this->loggerFactory, $this->session);
$this->assertEquals(TRUE, $cas_helper->canBeProxied());
}