SingleLogoutService.php

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<?php

require_once('../../_include.php');

SimpleSAML\Logger::info('SAML2.0 - IdP.SingleLogoutService: Accessing SAML 2.0 IdP endpoint SingleLogoutService');

$metadata = SimpleSAML_Metadata_MetaDataStorageHandler::getMetadataHandler();
$idpEntityId = $metadata->getMetaDataCurrentEntityID('saml20-idp-hosted');
$idp = SimpleSAML_IdP::getById('saml2:'.$idpEntityId);

if (isset($_REQUEST['ReturnTo'])) {
    $idp->doLogoutRedirect(\SimpleSAML\Utils\HTTP::checkURLAllowed((string) $_REQUEST['ReturnTo']));
} else {
    try {
        sspmod_saml_IdP_SAML2::receiveLogoutMessage($idp);
    } catch (Exception $e) { // TODO: look for a specific exception
        /*
         * This is dirty. Instead of checking the message of the exception, \SAML2\Binding::getCurrentBinding() should
         * throw an specific exception when the binding is unknown, and we should capture that here
         */
        if ($e->getMessage() === 'Unable to find the current binding.') {
            throw new SimpleSAML_Error_Error('SLOSERVICEPARAMS', $e, 400);
        } else {
            throw $e; // do not ignore other exceptions!
        }
    }
}
assert(FALSE);