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<?php
/**
* Implementation of the Shibboleth 1.3 HTTP-POST binding.
*
* @author Andreas Åkre Solberg, UNINETT AS. <andreas.solberg@uninett.no>
* @package simpleSAMLphp
* @version $Id: HTTPPost.php 2542 2010-09-10 13:14:09Z olavmrk $
*/
class SimpleSAML_Bindings_Shib13_HTTPPost {
private $configuration = null;
private $metadata = null;
function __construct(SimpleSAML_Configuration $configuration, SimpleSAML_Metadata_MetaDataStorageHandler $metadatastore) {
$this->configuration = $configuration;
$this->metadata = $metadatastore;
}
/**
* Send an authenticationResponse using HTTP-POST.
*
* @param string $response The response which should be sent.
* @param SimpleSAML_Configuration $idpmd The metadata of the IdP which is sending the response.
* @param SimpleSAML_Configuration $spmd The metadata of the SP which is receiving the response.
* @param string|NULL $relayState The relaystate for the SP.
* @param string $shire The shire which should receive the response.
*/
public function sendResponse($response, SimpleSAML_Configuration $idpmd, SimpleSAML_Configuration $spmd, $relayState, $shire) {
SimpleSAML_Utilities::validateXMLDocument($response, 'saml11');
$privatekey = SimpleSAML_Utilities::loadPrivateKey($idpmd, TRUE);
$publickey = SimpleSAML_Utilities::loadPublicKey($idpmd, TRUE);
$responsedom = new DOMDocument();
$responsedom->loadXML(str_replace ("\r", "", $response));
$responseroot = $responsedom->getElementsByTagName('Response')->item(0);
$firstassertionroot = $responsedom->getElementsByTagName('Assertion')->item(0);
/* Determine what we should sign - either the Response element or the Assertion. The default
* is to sign the Assertion, but that can be overridden by the 'signresponse' option in the
* SP metadata or 'saml20.signresponse' in the global configuration.
*/
$signResponse = FALSE;
if ($spmd->hasValue('signresponse')) {
$signResponse = $spmd->getBoolean['signresponse'];
} else {
$signResponse = $this->configuration->getBoolean('shib13.signresponse', TRUE);
}
/* Check if we have an assertion to sign. Force to sign the response if not. */
if ($firstassertionroot === NULL) {
$signResponse = TRUE;
}
$signer = new SimpleSAML_XML_Signer(array(
'privatekey_array' => $privatekey,
'publickey_array' => $publickey,
'id' => ($signResponse ? 'ResponseID' : 'AssertionID') ,
));
if ($idpmd->hasValue('certificatechain')) {
$signer->addCertificate($idpmd->getString('certificatechain'));
}
if ($signResponse) {
/* Sign the response - this must be done after encrypting the assertion. */
/* We insert the signature before the saml2p:Status element. */
$statusElements = SimpleSAML_Utilities::getDOMChildren($responseroot, 'Status', '@saml1p');
assert('count($statusElements) === 1');
$signer->sign($responseroot, $responseroot, $statusElements[0]);
} else {
/* Sign the assertion */
$signer->sign($firstassertionroot, $firstassertionroot);
}
$response = $responsedom->saveXML();
SimpleSAML_Utilities::debugMessage($response, 'out');
SimpleSAML_Utilities::postRedirect($shire, array(
'TARGET' => $relayState,
'SAMLResponse' => base64_encode($response),
));
}
/**
* Decode a received response.
*
* @param array $post POST data received.
* @return SimpleSAML_XML_Shib13_AuthnResponse Response.
*/
public function decodeResponse($post) {
assert('is_array($post)');
if (!array_key_exists('SAMLResponse', $post)) {
throw new Exception('Missing required SAMLResponse parameter.');
}
$rawResponse = $post['SAMLResponse'];
$samlResponseXML = base64_decode($rawResponse);
SimpleSAML_Utilities::debugMessage($samlResponseXML, 'in');
SimpleSAML_Utilities::validateXMLDocument($samlResponseXML, 'saml11');
$samlResponse = new SimpleSAML_XML_Shib13_AuthnResponse();
$samlResponse->setXML($samlResponseXML);
if (array_key_exists('TARGET', $post)) {
$samlResponse->setRelayState($post['TARGET']);
}
return $samlResponse;
}
}
?>
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