+ function sendSecurityHeaders() {
+ // Send various headers that we want to have for security resons, mostly as recommended by https://observatory.mozilla.org/
+
+ // CSP - see https://wiki.mozilla.org/Security/Guidelines/Web_Security#Content_Security_Policy
+ // Disable unsafe inline/eval, only allow loading of resources (images, fonts, scripts, etc.) from ourselves; also disable framing.
+ header('Content-Security-Policy: default-src \'none\';img-src \'self\'; script-src \'self\'; style-src \'self\'; frame-ancestors \'none\'');
+
+ // X-Content-Type-Options - see https://wiki.mozilla.org/Security/Guidelines/Web_Security#X-Content-Type-Options
+ // Prevent browsers from incorrectly detecting non-scripts as scripts
+ header('X-Content-Type-Options: nosniff');
+
+ // X-Frame-Options (for older browsers) - see https://wiki.mozilla.org/Security/Guidelines/Web_Security#X-Frame-Options
+ // Block site from being framed
+ header('X-Frame-Options: DENY');
+
+ // X-XSS-Protection (for older browsers) - see https://wiki.mozilla.org/Security/Guidelines/Web_Security#X-XSS-Protection
+ // Block pages from loading when they detect reflected XSS attacks
+ header('X-XSS-Protection: 1; mode=block');
+ }
+
+ function initSession() {
+ $session = null;
+ if (strlen(@$_COOKIE['sessionkey'])) {
+ // Fetch the session - or at least try to.
+ $result = $this->db->prepare('SELECT * FROM `auth_sessions` WHERE `sesskey` = :sesskey AND `time_expire` > :expire;');
+ $result->execute(array(':sesskey' => $_COOKIE['sessionkey'], ':expire' => gmdate('Y-m-d H:i:s')));
+ $row = $result->fetch(PDO::FETCH_ASSOC);
+ if ($row) {
+ $session = $row;
+ }
+ }
+ if (is_null($session)) {
+ // Create new session and set cookie.
+ $sesskey = $this->createSessionKey();
+ setcookie('sessionkey', $sesskey, 0, "", "", !$this->running_on_localhost, true); // Last two params are secure and httponly, secure is not set on localhost.
+ $result = $this->db->prepare('INSERT INTO `auth_sessions` (`sesskey`, `time_expire`) VALUES (:sesskey, :expire);');
+ $result->execute(array(':sesskey' => $sesskey, ':expire' => gmdate('Y-m-d H:i:s', strtotime('+5 minutes'))));
+ // After insert, actually fetch the session row from the DB so we have all values.
+ $result = $this->db->prepare('SELECT * FROM auth_sessions WHERE `sesskey` = :sesskey AND `time_expire` > :expire;');
+ $result->execute(array(':sesskey' => $sesskey, ':expire' => gmdate('Y-m-d H:i:s')));
+ $row = $result->fetch(PDO::FETCH_ASSOC);
+ if ($row) {
+ $session = $row;
+ }
+ else {
+ $this->log('session_create_failure', 'key: '.$sesskey);
+ }
+ }
+ return $session;
+ }
+
+ function getDomainBaseURL() {
+ return ($this->running_on_localhost?'http':'https').'://'.$_SERVER['SERVER_NAME'];
+ }
+