+/**
+ * Test if the given IP is whitelisted by the given list.
+ *
+ * @param $allowedIpList array of allowed IPs
+ * @param $challengedIp IP to be challenged
+ * @return true if IP is authorized, false otherwise.
+ */
+function jirafeau_challenge_ip($allowedIpList, $challengedIp)
+{
+ foreach ($allowedIpList as $i) {
+ if ($i == $challengedIp) {
+ return true;
+ }
+ // CIDR test for IPv4 only.
+ if (strpos($i, '/') !== false) {
+ list($subnet, $mask) = explode('/', $i);
+ if ((ip2long($challengedIp) & ~((1 << (32 - $mask)) - 1)) == ip2long($subnet)) {
+ return true;
+ }
+ }
+ }
+ return false;
+}
+
+/**
+ * Check if Jirafeau has a restriction on the IP address for uploading.
+ * @return true if uploading is IP restricted, false otherwise.
+ */
+function jirafeau_upload_has_ip_restriction($cfg) {
+ return count($cfg['upload_ip']) > 0;
+}
+
+/**
+ * Test if visitor's IP is authorized to upload at all.
+ *
+ * @param $cfg configuration
+ * @param $challengedIp IP to be challenged
+ * @return true if IP is authorized, false otherwise.
+ */
+function jirafeau_challenge_upload_ip($cfg, $challengedIp)
+{
+ // If no IP address have been listed, allow upload from any IP
+ if (!jirafeau_upload_has_ip_restriction($cfg)) {
+ return true;
+ }
+ return jirafeau_challenge_ip($cfg['upload_ip'], $challengedIp);
+}
+
+/**
+ * Test if visitor's IP is authorized to upload without a password.
+ *
+ * @param $cfg configuration
+ * @param $challengedIp IP to be challenged
+ * @return true if IP is authorized, false otherwise.
+ */
+function jirafeau_challenge_upload_ip_without_password($cfg, $challengedIp)
+{
+ return jirafeau_challenge_ip($cfg['upload_ip_nopassword'], $challengedIp);
+}
+
+/**
+ * Test if visitor's IP is authorized or password is supplied and authorized
+ * @param $ip IP to be challenged
+ * @param $password password to be challenged
+ * @return true if access is valid, false otherwise.
+ */
+function jirafeau_challenge_upload ($cfg, $ip, $password)
+{
+ return jirafeau_challenge_upload_ip_without_password($cfg, $ip) ||
+ (!jirafeau_has_upload_password($cfg) && !jirafeau_upload_has_ip_restriction($cfg)) ||
+ (jirafeau_challenge_upload_password($cfg, $password) && jirafeau_challenge_upload_ip($cfg, $ip));
+}
+
+/** Tell if we have some HTTP headers generated by a proxy */
+function has_http_forwarded()
+{
+ return
+ !empty($_SERVER['HTTP_X_FORWARDED_FOR']) ||
+ !empty($_SERVER['http_X_forwarded_for']);
+}
+
+/**
+ * Generate IP list from HTTP headers generated by a proxy
+ * @return array of IP strings
+ */
+function get_ip_list_http_forwarded()
+{
+ $ip_list = array();
+ if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
+ $l = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
+ if ($l === false) {
+ return array();
+ }
+ foreach ($l as $ip) {
+ array_push($ip_list, preg_replace('/\s+/', '', $ip));
+ }
+ }
+ if (!empty($_SERVER['http_X_forwarded_for'])) {
+ $l = explode(',', $_SERVER['http_X_forwarded_for']);
+ foreach ($l as $ip) {
+ // Separate IP from port
+ $ipa = explode(':', $ip);
+ if ($ipa === false) {
+ continue;
+ }
+ $ip = $ipa[0];
+ array_push($ip_list, preg_replace('/\s+/', '', $ip));
+ }
+ }
+ return $ip_list;
+}
+
+/**
+ * Get the ip address of the client from REMOTE_ADDR
+ * or from HTTP_X_FORWARDED_FOR if behind a proxy
+ * @returns the client ip address
+ */
+function get_ip_address($cfg)
+{
+ $remote = $_SERVER['REMOTE_ADDR'];
+ if (count($cfg['proxy_ip']) == 0 || !has_http_forwarded()) {
+ return $remote;
+ }
+
+ $ip_list = get_ip_list_http_forwarded();
+ if (count($ip_list) == 0) {
+ return $remote;
+ }
+
+ foreach ($cfg['proxy_ip'] as $proxy_ip) {
+ if ($remote != $proxy_ip) {
+ continue;
+ }
+ // Take the last IP (the one which has been set by the defined proxy).
+ return end($ip_list);
+ }
+ return $remote;
+}
+
+/**
+ * Convert hexadecimal string to base64
+ */
+function hex_to_base64($hex)
+{
+ $b = '';
+ foreach (str_split($hex, 2) as $pair) {
+ $b .= chr(hexdec($pair));
+ }
+ return base64_encode($b);
+}
+
+/**
+ * Replace markers in templates.
+ *
+ * Available markers have the scheme "###MARKERNAME###".
+ *
+ * @param $content string Template text with markers
+ * @param $htmllinebreaks boolean Convert linebreaks to BR-Tags
+ * @return Template with replaced markers
+ */
+function jirafeau_replace_markers($content, $htmllinebreaks = false)
+{
+ $patterns = array(
+ '/###ORGANISATION###/',
+ '/###CONTACTPERSON###/',
+ '/###WEBROOT###/'
+ );
+ $replacements = array(
+ $GLOBALS['cfg']['organisation'],
+ $GLOBALS['cfg']['contactperson'],
+ $GLOBALS['cfg']['web_root']
+ );
+ $content = preg_replace($patterns, $replacements, $content);
+
+ if (true === $htmllinebreaks) {
+ $content = nl2br($content);
+ }
+
+ return $content;
+}
+
+function jirafeau_escape($string)
+{
+ return htmlspecialchars($string, ENT_QUOTES);
+}
+
+function jirafeau_admin_session_start()
+{
+ $_SESSION['admin_auth'] = true;
+ $_SESSION['admin_csrf'] = md5(uniqid(mt_rand(), true));
+}
+
+function jirafeau_admin_session_end()
+{
+ $_SESSION = array();
+ session_destroy();
+}
+
+function jirafeau_admin_session_logged()
+{
+ return isset($_SESSION['admin_auth']) &&
+ isset($_SESSION['admin_csrf']) &&
+ isset($_POST['admin_csrf']) &&
+ $_SESSION['admin_auth'] === true &&
+ $_SESSION['admin_csrf'] === $_POST['admin_csrf'];
+}
+
+function jirafeau_admin_csrf_field()
+{
+ return "<input type='hidden' name='admin_csrf' value='". $_SESSION['admin_csrf'] . "'/>";
+}
git.p6c8.net / jirafeau_project.git / blobdiff