Viewing file:  initSSO.php (5.47 KB) -rwxrwxr-x
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<?php
require_once('../../_include.php');
$config = SimpleSAML_Configuration::getInstance();
$metadata = SimpleSAML_Metadata_MetaDataStorageHandler::getMetadataHandler();
$session = SimpleSAML_Session::getInstance();
SimpleSAML_Logger::info('SAML2.0 - SP.initSSO: Accessing SAML 2.0 SP initSSO script');
if (!$config->getBoolean('enable.saml20-sp', TRUE))
throw new SimpleSAML_Error_Error('NOACCESS');
/*
* Incomming URL parameters
*
* idpentityid optional The entityid of the wanted IdP to authenticate with. If not provided will use default.
* spentityid optional The entityid of the SP config to use. If not provided will use default to host.
* RelayState required Where to send the user back to after authentication.
*/
if (empty($_GET['RelayState'])) {
throw new SimpleSAML_Error_Error('NORELAYSTATE');
}
$reachableIDPs = array();
try {
$idpentityid = isset($_GET['idpentityid']) ? $_GET['idpentityid'] : $config->getString('default-saml20-idp', NULL) ;
$spentityid = isset($_GET['spentityid']) ? $_GET['spentityid'] : $metadata->getMetaDataCurrentEntityID();
$isPassive = isset($_GET['IsPassive']) && ($_GET['IsPassive'] === 'true' || $_GET['IsPassive'] === '1');
$forceAuthn = isset($_GET['ForceAuthn']) && ($_GET['ForceAuthn'] === 'true' || $_GET['ForceAuthn'] === '1');
/* We are going to need the SP metadata to determine which IdP discovery service we should use.
And for checking for scoping parameters. */
$spmetadata = $metadata->getMetaDataCurrent('saml20-sp-hosted');
$IDPList = array();
/* Configured idp overrides one given by Scope */
if($idpentityid === NULL && array_key_exists('idpentityid', $spmetadata)) {
$idpentityid = $spmetadata['idpentityid'];
}
/* AuthId is set if we are on the sp side on a proxy/bridge */
$authid = isset($_GET['AuthId']) ? $_GET['AuthId'] : FALSE;
if ($authid) {
$authrequestcache = $session->getAuthnRequest('saml2', $authid);
$isPassive = $isPassive || $authrequestcache['IsPassive'];
$forceAuthn = $forceAuthn || $authrequestcache['ForceAuthn'];
/* keep the IDPList, it MUST be sent it to the next idp,
we are only allowed to add idps */
if (isset($authrequestcache['IDPList']) && is_array($authrequestcache['IDPList'])) {
$IDPList = $authrequestcache['IDPList'];
}
if ($idpentityid === NULL) {
/* only consider ProviderIDs we know ... */
$reachableIDPs = array_intersect($IDPList, array_keys($metadata->getList()));
if (sizeof($reachableIDPs) === 1) {
$idpentityid = array_shift($reachableIDPs);
}
}
}
} catch (Exception $exception) {
throw new SimpleSAML_Error_Error('METADATA', $exception);
}
/*
* If no IdP can be resolved, send the user to the SAML 2.0 Discovery Service
*/
if ($idpentityid === NULL) {
SimpleSAML_Logger::info('SAML2.0 - SP.initSSO: No chosen or default IdP, go to SAML2disco');
/* Which IdP discovery service should we use? Can be set in SP metadata or in global configuration.
* Falling back to builtin discovery service.
*/
if(array_key_exists('idpdisco.url', $spmetadata)) {
$discourl = $spmetadata['idpdisco.url'];
} elseif($config->getString('idpdisco.url.saml20', NULL) !== NULL) {
$discourl = $config->getString('idpdisco.url.saml20');
} else {
$discourl = SimpleSAML_Utilities::getBaseURL() . 'saml2/sp/idpdisco.php';
}
if ($config->getBoolean('idpdisco.extDiscoveryStorage', NULL) != NULL) {
$extDiscoveryStorage = $config->getBoolean('idpdisco.extDiscoveryStorage');
SimpleSAML_Utilities::redirect($extDiscoveryStorage, array(
'entityID' => $spentityid,
'return' => SimpleSAML_Utilities::addURLparameter($discourl, array(
'return' => SimpleSAML_Utilities::selfURL(),
'remember' => 'true',
'entityID' => $spentityid,
'returnIDParam' => 'idpentityid',
)),
'returnIDParam' => 'idpentityid',
'isPassive' => 'true')
);
}
$discoparameters = array(
'entityID' => $spentityid,
'return' => SimpleSAML_Utilities::selfURL(),
'returnIDParam' => 'idpentityid');
$discoparameters['isPassive'] = $isPassive;
if (sizeof($reachableIDPs) > 0) {
$discoparameters['IDPList'] = $reachableIDPs;
}
SimpleSAML_Utilities::redirect($discourl, $discoparameters);
}
/*
* Create and send authentication request to the IdP.
*/
try {
$spMetadata = $metadata->getMetaDataConfig($spentityid, 'saml20-sp-hosted');
$idpMetadata = $metadata->getMetaDataConfig($idpentityid, 'saml20-idp-remote');
$ar = sspmod_saml_Message::buildAuthnRequest($spMetadata, $idpMetadata);
$assertionConsumerServiceURL = $metadata->getGenerated('AssertionConsumerService', 'saml20-sp-hosted');
$ar->setAssertionConsumerServiceURL($assertionConsumerServiceURL);
$ar->setRelayState($_REQUEST['RelayState']);
if ($isPassive) {
$ar->setIsPassive(TRUE);
}
if ($forceAuthn) {
$ar->setForceAuthn(TRUE);
}
if(array_key_exists('IDPList', $spmetadata)) {
$IDPList = array_unique(array_merge($IDPList, $spmetadata['IDPList']));
}
if (isset($_GET['IDPList']) && !empty($_GET['IDPList'])) {
$providers = $_GET['IDPList'];
if (!is_array($providers)) $providers = array($providers);
$IDPList = array_merge($IDPList, $providers);
};
$ar->setIDPList($IDPList);
/* Save request information. */
$info = array();
$info['RelayState'] = $_REQUEST['RelayState'];
if(array_key_exists('OnError', $_REQUEST)) {
$info['OnError'] = $_REQUEST['OnError'];
}
$session->setData('SAML2:SP:SSO:Info', $ar->getId(), $info);
$b = new SAML2_HTTPRedirect();
$b->send($ar);
} catch(Exception $exception) {
throw new SimpleSAML_Error_Error('CREATEREQUEST', $exception);
}
?>
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