Replaced all deprecated functions so FA runs in php >= 5.3.0 as well.
[fa-stable.git] / includes / session.inc
index d3ddf6009ed36bbe5645a12e49fe00611659b9c7..ba703dee0e8432e5dbd442cfcfd78b2e66db3be8 100644 (file)
 <?php
-       /*--------------------------------------------------\
-       |               |               | session.inc       |
-       |---------------------------------------------------|
-    | front_accounting                                                                         |
-    | http://open-accounting.sourceforge.net/                          |
-    | by KylieTech Consulting                           |
-    | http://frontaccounting.com/                              |
-    | by Joe Hunt Consulting         |
-       \--------------------------------------------------*/
-
-       if (!isset($path_to_root)) 
-       {
-               $path_to_root = ".";
+/**********************************************************************
+       Copyright (C) FrontAccounting, LLC.
+       Released under the terms of the GNU General Public License, GPL,
+       as published by the Free Software Foundation, either version 3
+       of the License, or (at your option) any later version.
+       This program is distributed in the hope that it will be useful,
+       but WITHOUT ANY WARRANTY; without even the implied warranty of
+       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+       See the License here <http://www.gnu.org/licenses/gpl-3.0.html>.
+***********************************************************************/
+function output_html($text)
+{
+       global $before_box, $Ajax, $messages;
+       // Fatal errors are not send to error_handler,
+       // so we must check the output
+       if ($text && preg_match('/\bFatal error(<.*?>)?:(.*)/i', $text, $m)) {
+               $Ajax->aCommands = array();  // Don't update page via ajax on errors
+               $text = preg_replace('/\bFatal error(<.*?>)?:(.*)/i','', $text);
+               $messages[] = array(E_ERROR, $m[2], null, null);
        }
+       $Ajax->run();
+       return  in_ajax() ? fmt_errors() : ($before_box.fmt_errors().$text);
+}
+//----------------------------------------------------------------------------------------
+
+function kill_login()
+{
+       session_unset();
+       session_destroy();
+}
+//----------------------------------------------------------------------------------------
 
-    include_once($path_to_root . "/includes/current_user.inc");
+function login_fail()
+{
+       global $path_to_root;
+       
+       header("HTTP/1.1 401 Authorization Required");
+       echo "<center><br><br><font size='5' color='red'><b>" . _("Incorrect Password") . "<b></font><br><br>";
+       echo "<b>" . _("The user and password combination is not valid for the system.") . "<b><br><br>";
 
-    include_once($path_to_root . "/config.php");
+       echo _("If you are not an authorized user, please contact your system administrator to obtain an account to enable you to use the system.");
+       echo "<br><a href='$path_to_root/index.php'>" . _("Try again") . "</a>";
+       echo "</center>";
 
-    include_once($path_to_root . "/includes/main.inc");
+       kill_login();
+       die();
+}
 
-    //----------------------------------------------------------------------------------------
+//----------------------------------------------------------------------------------------
 
-       function kill_login() 
+function check_page_security($page_security)
+{
+       if (!$_SESSION["wa_current_user"]->check_user_access())
        {
-        session_unset();
-               session_destroy();
-       }
+               // notification after upgrade from pre-2.2 version
+               $msg = $_SESSION["wa_current_user"]->old_db ?
+                        _("Security settings have not been defined for your user account.")
+                               . "<br>" . _("Please contact your system administrator.")       
+                       : _("Please remove \$security_groups and \$security_headings arrays from config.php file!");
 
-       //----------------------------------------------------------------------------------------
+               display_error($msg);
+               end_page();
+               kill_login();
+               exit;
+       }
 
-       function login_fail() 
+       if (!$_SESSION["wa_current_user"]->can_access_page($page_security))
        {
-        echo "<center><br><br><font size='5' color='red'><b>" . _("Incorrect Password") . "<b></font><br><br>";
-        echo "<b>" . _("The user and password combination is not valid for the system.") . "<b><br><br>";
-
-        echo _("If you are not an authorized user, please contact your system administrator to obtain an account to enable you to use the system.");
-               echo "<br><a href='javascript:history.go(-1)'>" . _("Back") . "</a>";
-        echo "</center>";
 
-        kill_login();
-        die();
+               echo "<center><br><br><br><b>";
+               echo _("The security settings on your account do not permit you to access this function");
+               echo "</b>";
+               echo "<br><br><br><br></center>";
+               end_page();
+               exit;
        }
+}
+/*
+       Helper function for setting page security level depeding on 
+       GET start variable and/or some value stored in session variable.
+       Before the call $page_security should be set to default page_security value.
+*/
+function set_page_security($value=null, $trans = array(), $gtrans = array())
+{
+       global $page_security;
 
-       //----------------------------------------------------------------------------------------
+       // first check is this is not start page call
+       foreach($gtrans as $key => $area)
+               if (isset($_GET[$key])) {
+                       $page_security = $area;
+                       return;
+               }
 
-       function check_page_security($page_security) 
-       {
-               if (!$_SESSION["wa_current_user"]->check_user_access()) 
-               {
-                       echo "<br><br><br><center>";
-                       echo "<b>" . _("Security settings have not been defined for your user account.");
-                       echo "<br>" . _("Please contact your system administrator.") . "</b>";
+       // then check session value
+       if (isset($trans[$value])) {
+               $page_security = $trans[$value];
+               return;
+       }
+}
 
-                       kill_login();
-                       exit;
-               }
+//-----------------------------------------------------------------------------
+//     Removing magic quotes from nested arrays/variables
+//
+function strip_quotes($data)
+{
+       if(get_magic_quotes_gpc()) {
+               if(is_array($data)) {
+                       foreach($data as $k => $v) {
+                               $data[$k] = strip_quotes($data[$k]);
+                       }
+               } else
+                       return stripslashes($data);
+       }
+       return $data;
+}
 
-               if (!$_SESSION["wa_current_user"]->can_access_page($page_security)) 
+//============================================================================
+//
+//
+function login_timeout()
+{
+       // skip timeout on logout page
+       if ($_SESSION["wa_current_user"]->logged) {
+               $tout = $_SESSION["wa_current_user"]->timeout;
+               if ($tout && (time() > $_SESSION["wa_current_user"]->last_act + $tout))
                {
-                       page(_("Access denied"));
-                       echo "<center><br><br><br><b>";
-                       echo _("The security settings on your account do not permit you to access this function");
-                       echo "</b>";
-                       echo "<br><br><a href='javascript:history.go(-1)'>" . _("Back") . "</a>";
-                       echo "<br><br><br><br>";
-                       //echo '<script type="text/javascript">';
-                       //echo 'alert("' . _("The security settings on your account do not permit you to access this function") . '");';
-                       //echo 'history.go(-1)';
-                       //echo '</script>'
-                       end_page();
-                       //kill_login();
-                       exit;
+                       $_SESSION["wa_current_user"]->logged = false;
                }
+               $_SESSION["wa_current_user"]->last_act = time();
        }
+}
+//============================================================================
+if (!isset($path_to_root))
+{
+       $path_to_root = ".";
+}
 
-       //----------------------------------------------------------------------------------------
+// Prevent register_globals vulnerability
+if (isset($_GET['path_to_root']) || isset($_POST['path_to_root']))
+       die("Restricted access");
+
+include_once($path_to_root . "/includes/current_user.inc");
+include_once($path_to_root . "/frontaccounting.php");
+include_once($path_to_root . "/admin/db/security_db.inc");
+include_once($path_to_root . "/includes/lang/language.php");
+include_once($path_to_root . "/config_db.php");
+include_once($path_to_root . "/includes/ajax.inc");
+include_once($path_to_root . "/includes/ui/ui_msgs.inc");
+
+/*
+       Uncomment the setting below when using FA on shared hosting
+       to avoid unexpeced session timeouts.
+       Make sure this directory exists and is writable!
+*/
+//ini_set('session.save_path', dirname(__FILE__).'/../tmp/');
+
+ini_set('session.gc_maxlifetime', 36000); // 10hrs
+
+session_name('FrontAccounting');
+session_start();
+// this is to fix the "back-do-you-want-to-refresh" issue - thanx PHPFreaks
+header("Cache-control: private");
 
-       if (!isset($_SESSION["wa_current_user"]) ||
-               (isset($_SESSION["wa_current_user"]) && !$_SESSION["wa_current_user"]->logged_in())) 
-       {
 
-               $_SESSION["wa_current_user"] = new current_user();
+get_text_init();
 
-        // Show login screen
-        if (!isset($_POST["user_name_entry_field"]) or $_POST["user_name_entry_field"] == ""
-        {
-               include($path_to_root . "/access/login.php");
-            exit;
-        }
-       }
+// Page Initialisation
+if (!isset($_SESSION['language'])
+{
+       $l = array_search_value($dflt_lang, $installed_languages,  'code');
+       $_SESSION['language'] = new language($l['name'], $l['code'], $l['encoding'],
+        isset($l['rtl']) ? 'rtl' : 'ltr');
+}
 
-       if (isset($_POST["user_name_entry_field"])) 
-       {
-               $succeed = $_SESSION["wa_current_user"]->login($_POST["company_login_name"],
-                       $_POST["user_name_entry_field"],
-                       md5($_POST["password"]));
+$_SESSION['language']->set_language($_SESSION['language']->code);
 
-               if (!$succeed) 
+// include $Hooks object if locale file exists
+if(@include_once($path_to_root . "/lang/".$_SESSION['language']->code."/locale.inc")) 
+{
+       $Hooks = new Hooks();
+}
+
+include_once($path_to_root . "/includes/access_levels.inc");
+include_once($path_to_root . "/config.php");
+include_once($path_to_root . "/includes/main.inc");
+
+// Ajax communication object
+$Ajax = new Ajax();
+
+// js/php validation rules container
+$Validate = array();
+// bindings for editors
+$Editors = array();
+// page help. Currently help for function keys.
+$Pagehelp = array();
+
+$SysPrefs = new sys_prefs();
+
+$Refs = new references();
+
+// intercept all output to destroy it in case of ajax call
+register_shutdown_function('end_flush');
+ob_start('output_html',0);
+
+// colect all error msgs
+set_error_handler('error_handler' /*, errtypes */);
+
+if (!isset($_SESSION["wa_current_user"]))
+       $_SESSION["wa_current_user"] = new current_user();
+
+// logout.php is the only page we should have always 
+// accessable regardless of access level and current login status.
+if (strstr($_SERVER['PHP_SELF'], 'logout.php') == false){
+
+       login_timeout();
+
+       if (!$_SESSION["wa_current_user"]->logged_in())
+       {
+               // Show login screen
+               if (!isset($_POST["user_name_entry_field"]) or $_POST["user_name_entry_field"] == "")
                {
+                       $_SESSION['timeout'] = array( 'uri'=> $_SERVER['REQUEST_URI'],
+                               'post' => $_POST);
+
+                       if (!in_ajax()) {
+                               include($path_to_root . "/access/login.php");
+                       } else {
+                               // ajax update of current page elements - open login window in popup
+                               // to not interfere with ajaxified page.
+                               $Ajax->popup($path_to_root . "/access/timeout.php");
+                       }
+                       exit;
+               } else {
+                       $succeed = $_SESSION["wa_current_user"]->login($_POST["company_login_name"],
+                               $_POST["user_name_entry_field"], md5($_POST["password"]));
+                       // select full vs fallback ui mode on login
+                       $_SESSION["wa_current_user"]->ui_mode = $_POST['ui_mode'];
+                       if (!$succeed)
+                       {
                        // Incorrect password
-                       login_fail();
+                               login_fail();
+                       }
+                       $lang = &$_SESSION['language'];
+                       $lang->set_language($_SESSION['language']->code);
                }
-       }
+       } else
+               set_global_connection();
+
+       if (!$_SESSION["wa_current_user"]->old_db)
+               include_once($path_to_root . '/company/'.user_company().'/installed_extensions.php');
+
+       if (!isset($_SESSION["App"])) {
+               $_SESSION["App"] = new front_accounting();
+               $_SESSION["App"]->init();
+       }
+}
 
-       check_page_security($page_security);
 
-    // Run with debugging messages for the system administrator(s) but not anyone else
-    /*if (in_array(15, $security_groups[$_SESSION["AccessLevel"]])) {
-        $debug = 1;
-    } else {
-        $debug = 0;
-    }*/
+// 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