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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
*/
class SimpleSAML_Bindings_Shib13_HTTPPost
{
/**
* @var SimpleSAML_Configuration
*/
private $configuration = null;
/**
* @var SimpleSAML_Metadata_MetaDataStorageHandler
*/
private $metadata = null;
/**
* Constructor for the SimpleSAML_Bindings_Shib13_HTTPPost class.
*
* @param SimpleSAML_Configuration $configuration The configuration to use.
* @param SimpleSAML_Metadata_MetaDataStorageHandler $metadatastore A store where to find metadata.
*/
public 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,
$shire
) {
\SimpleSAML\Utils\XML::checkSAMLMessage($response, 'saml11');
$privatekey = SimpleSAML\Utils\Crypto::loadPrivateKey($idpmd, true);
$publickey = SimpleSAML\Utils\Crypto::loadPublicKey($idpmd, true);
$responsedom = SAML2_DOMDocumentFactory::fromString(str_replace("\r", "", $response));
$responseroot = $responsedom->getElementsByTagName('Response')->item(0);
$firstassertionroot = $responsedom->getElementsByTagName('Assertion')->item(0);
/* Determine what we should sign - either the Response element or the Assertion. The default is to sign the
* Assertion, but that can be overridden by the 'signresponse' option in the SP metadata or
* 'saml20.signresponse' in the global configuration.
*
* TODO: neither 'signresponse' nor 'shib13.signresponse' are valid options any longer. Remove!
*/
if ($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
$statusElements = SimpleSAML\Utils\XML::getDOMChildren($responseroot, 'Status', '@saml1p');
assert('count($statusElements) === 1');
$signer->sign($responseroot, $responseroot, $statusElements[0]);
} else {
// Sign the assertion
$signer->sign($firstassertionroot, $firstassertionroot);
}
$response = $responsedom->saveXML();
\SimpleSAML\Utils\XML::debugSAMLMessage($response, 'out');
\SimpleSAML\Utils\HTTP::submitPOSTData($shire, array(
'TARGET' => $relayState,
'SAMLResponse' => base64_encode($response),
));
}
/**
* Decode a received response.
*
* @param array $post POST data received.
*
* @return SimpleSAML_XML_Shib13_AuthnResponse The response decoded into an object.
*
* @throws Exception If there is no SAMLResponse parameter.
*/
public function decodeResponse($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\Utils\XML::debugSAMLMessage($samlResponseXML, 'in');
\SimpleSAML\Utils\XML::checkSAMLMessage($samlResponseXML, 'saml11');
$samlResponse = new SimpleSAML_XML_Shib13_AuthnResponse();
$samlResponse->setXML($samlResponseXML);
if (array_key_exists('TARGET', $post)) {
$samlResponse->setRelayState($post['TARGET']);
}
return $samlResponse;
}
}
|
