Merged changes form stable branch up to 2.3.13

[fa-stable.git] / includes / session.inc

diff --git a/includes/session.inc b/includes/session.inc
index 7cd9d749fe3dcec85b13a5b0f4d43e62fab8f401..9a3efc267fd696e5206ede57d78a6c29dc56d7fc 100644 (file)
--- a/includes/session.inc
+++ b/includes/session.inc
@@ -18,7 +18,7 @@ class SessionManager
                session_name($name);
 
                // Set SSL level
-               $https = isset($secure) ? $secure : isset($_SERVER['HTTPS']);
+               $https = isset($secure) ? $secure : (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off');
 
                // Set session cookie options
                session_set_cookie_params($limit, $path, $domain, $https, true);
@@ -77,7 +77,6 @@ class SessionManager
 
                // Create new session without destroying the old one
                session_regenerate_id();
- 
                // Grab current session ID and close both sessions to allow other scripts to use them
                $newSession = session_id();
                session_write_close();
@@ -141,6 +140,58 @@ function login_fail()
        die();
 }
 
+function check_faillog()
+{
+       global $login_delay, $login_faillog, $login_max_attempts;
+
+       $user = $_SESSION["wa_current_user"]->user;
+
+       if (@$login_delay && (@$login_faillog[$user][$_SERVER['REMOTE_ADDR']] >= @$login_max_attempts) && (time() < $login_faillog[$user]['last'] + $login_delay))
+               return true;
+
+       return false;
+}
+/*
+       Simple brute force attack detection is performed before connection to company database is open. Therefore access counters have to be stored in file.
+       Login attempts counter is created for every new user IP, which partialy prevent DOS attacks.
+*/
+function write_login_filelog($login, $result)
+{
+       global $login_faillog, $login_max_attempts, $path_to_root;
+
+       $user = $_SESSION["wa_current_user"]->user;
+
+       $ip = $_SERVER['REMOTE_ADDR'];
+
+       if (!isset($login_faillog[$user][$ip]) || $result) // init or reset on successfull login
+               $login_faillog[$user] = array($ip => 0, 'last' => '');
+
+       if (!$result)
+       {
+               if ($login_faillog[$user][$ip] < @$login_max_attempts) {
+
+                       $login_faillog[$user][$ip]++;
+               } else {
+                       $login_faillog[$user][$ip] = 0; // comment out to restart counter only after successfull login.
+                       error_log(sprintf(_("Brute force attack on account '%s' detected. Access for non-logged users temporarily blocked."     ), $login));
+               }
+               $login_faillog[$user]['last'] = time();
+       }
+
+       $msg = "<?php\n";
+       $msg .= "/*\n";
+       $msg .= "Login attempts info.\n";
+       $msg .= "*/\n";
+       $msg .= "\$login_faillog = " .var_export($login_faillog, true). ";\n";
+
+       $filename = $path_to_root."/faillog.php";
+
+       if ((!file_exists($filename) && is_writable($path_to_root)) || is_writable($filename))
+       {
+               file_put_contents($filename, $msg);
+       }
+}
+
 //----------------------------------------------------------------------------------------
 
 function check_page_security($page_security)
@@ -258,6 +309,16 @@ if (!isset($path_to_root))
        $path_to_root = ".";
 }
 
+//----------------------------------------------------------------------------------------
+// set to reasonable values if not set in config file (pre-2.3.12 installations)
+
+if ((!isset($login_delay)) || ($login_delay < 0))
+    $login_delay = 10;
+
+if ((!isset($login_max_attempts)) || ($login_max_attempts < 0))
+    $login_max_attempts = 3; 
+
+
 // Prevent register_globals vulnerability
 if (isset($_GET['path_to_root']) || isset($_POST['path_to_root']))
        die("Restricted access");
@@ -293,6 +354,9 @@ foreach ($installed_extensions as $ext)
 // ini_set('session.save_path', dirname(__FILE__).'/../tmp/');
 
 ini_set('session.gc_maxlifetime', 36000); // 10hrs
+ini_set('session.cache_limiter', 'private'); // prevent 'page expired' errors
+
+hook_session_start(@$_POST["company_login_name"]);
 
 $Session_manager = new SessionManager();
 $Session_manager->sessionStart('FA'.md5(dirname(__FILE__)));
@@ -303,8 +367,12 @@ header("Cache-control: private");
 include_once($path_to_root . "/config.php");
 get_text_init();
 
+if ($login_delay > 0)
+       @include_once($path_to_root . "/faillog.php");
+
 // Page Initialisation
-if (!isset($_SESSION['language']) || !method_exists($_SESSION['language'], 'set_language')) 
+if (!isset($_SESSION['wa_current_user']) || !$_SESSION['wa_current_user']->logged_in()
+       || !isset($_SESSION['language']) || !method_exists($_SESSION['language'], 'set_language'))
 {
        $l = array_search_value($dflt_lang, $installed_languages,  'code');
        $_SESSION['language'] = new language($l['name'], $l['code'], $l['encoding'],
@@ -317,6 +385,7 @@ $_SESSION['language']->set_language($_SESSION['language']->code);
 include_once($path_to_root . "/includes/access_levels.inc");
 include_once($path_to_root . "/version.php");
 include_once($path_to_root . "/includes/main.inc");
+include_once($path_to_root . "/includes/app_entries.inc");
 
 // Ajax communication object
 $Ajax = new Ajax();
@@ -368,7 +437,15 @@ if (strstr($_SERVER['PHP_SELF'], 'logout.php') == false){
                                $Ajax->activate('_page_body');
                        exit;
                } else {
-
+                       if (isset($_POST["company_login_nickname"]) && !isset($_POST["company_login_name"])) {
+                               for ($i = 0; $i < count($db_connections); $i++) {
+                                       if ($db_connections[$i]["name"] == $_POST["company_login_nickname"]) {
+                                               $_POST["company_login_name"] = $i;
+                                               unset($_POST["company_login_nickname"]);
+                                               break 1; // cannot pass variables to break from PHP v5.4 onwards
+                                       }
+                               }
+                       }
                        $succeed = isset($db_connections[$_POST["company_login_name"]]) &&
                                $_SESSION["wa_current_user"]->login($_POST["company_login_name"],
                                $_POST["user_name_entry_field"], $_POST["password"]);
@@ -379,11 +456,12 @@ if (strstr($_SERVER['PHP_SELF'], 'logout.php') == false){
                        // Incorrect password
                                login_fail();
                        }
-                       $lang = &$_SESSION['language'];
-                       $lang->set_language($_SESSION['language']->code);
                }
        } else
-               set_global_connection();
+       {       set_global_connection();
+                       if (db_fixed())
+                               db_set_encoding($_SESSION['language']->encoding);
+       }
 
        if (!isset($_SESSION["App"])) {
                $_SESSION["App"] = new front_accounting();
@@ -396,5 +474,3 @@ $SysPrefs = &$_SESSION['SysPrefs'];
 // POST vars cleanup needed for direct reuse.
 // We quote all values later with db_escape() before db update.
 $_POST = strip_quotes($_POST);
-
-?>
\ No newline at end of file