TraditionalLogoutHandler.php

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<?php

namespace SimpleSAML\IdP;

use SimpleSAML\Logger;
use SimpleSAML\Utils\HTTP;

class TraditionalLogoutHandler implements LogoutHandlerInterface
{

    private $idp;


    public function __construct(\SimpleSAML_IdP $idp)
    {
        $this->idp = $idp;
    }


    private function logoutNextSP(array &$state)
    {
        $association = array_pop($state['core:LogoutTraditional:Remaining']);
        if ($association === null) {
            $this->idp->finishLogout($state);
        }

        $relayState = \SimpleSAML_Auth_State::saveState($state, 'core:LogoutTraditional', true);

        $id = $association['id'];
        Logger::info('Logging out of '.var_export($id, true).'.');

        try {
            $idp = \SimpleSAML_IdP::getByState($association);
            $url = call_user_func(array($association['Handler'], 'getLogoutURL'), $idp, $association, $relayState);
            HTTP::redirectTrustedURL($url);
        } catch (\Exception $e) {
            Logger::warning('Unable to initialize logout to '.var_export($id, true).'.');
            $this->idp->terminateAssociation($id);
            $state['core:Failed'] = true;

            // Try the next SP
            $this->logoutNextSP($state);
            assert(false);
        }
    }


    public function startLogout(array &$state, $assocId)
    {
        $state['core:LogoutTraditional:Remaining'] = $this->idp->getAssociations();

        $this->logoutNextSP($state);
    }


    public function onResponse($assocId, $relayState, \SimpleSAML_Error_Exception $error = null)
    {
        assert(is_string($assocId));
        assert(is_string($relayState) || $relayState === null);

        if ($relayState === null) {
            throw new \SimpleSAML_Error_Exception('RelayState lost during logout.');
        }

        $state = \SimpleSAML_Auth_State::loadState($relayState, 'core:LogoutTraditional');

        if ($error === null) {
            Logger::info('Logged out of '.var_export($assocId, true).'.');
            $this->idp->terminateAssociation($assocId);
        } else {
            Logger::warning('Error received from '.var_export($assocId, true).' during logout:');
            $error->logWarning();
            $state['core:Failed'] = true;
        }

        $this->logoutNextSP($state);
    }
}