includes/session.inc

   1 <?php
   2 /**********************************************************************
   3         Copyright (C) FrontAccounting, LLC.
   4         Released under the terms of the GNU General Public License, GPL,
   5         as published by the Free Software Foundation, either version 3
   6         of the License, or (at your option) any later version.
   7         This program is distributed in the hope that it will be useful,
   8         but WITHOUT ANY WARRANTY; without even the implied warranty of
   9         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  10         See the License here <http://www.gnu.org/licenses/gpl-3.0.html>.
  11 ***********************************************************************/
  12 function output_html($text)
  13 {
  14         global $before_box, $Ajax, $messages;
  15         // Fatal errors are not send to error_handler,
  16         // so we must check the output
  17         if ($text && preg_match('/\bFatal error(<.*?>)?:(.*)/i', $text, $m)) {
  18                 $Ajax->aCommands = array();  // Don't update page via ajax on errors
  19                 $text = preg_replace('/\bFatal error(<.*?>)?:(.*)/i','', $text);
  20                 $messages[] = array(E_ERROR, $m[2], null, null);
  21         }
  22         $Ajax->run();
  23         return  in_ajax() ? fmt_errors() : ($before_box.fmt_errors().$text);
  24 }
  25 //----------------------------------------------------------------------------------------
  26
  27 function kill_login()
  28 {
  29         session_unset();
  30         session_destroy();
  31 }
  32 //----------------------------------------------------------------------------------------
  33
  34 function login_fail()
  35 {
  36         global $path_to_root;
  37
  38         header("HTTP/1.1 401 Authorization Required");
  39         echo "<center><br><br><font size='5' color='red'><b>" . _("Incorrect Password") . "<b></font><br><br>";
  40         echo "<b>" . _("The user and password combination is not valid for the system.") . "<b><br><br>";
  41
  42         echo _("If you are not an authorized user, please contact your system administrator to obtain an account to enable you to use the system.");
  43         echo "<br><a href='$path_to_root/index.php'>" . _("Try again") . "</a>";
  44         echo "</center>";
  45
  46         kill_login();
  47         die();
  48 }
  49
  50 //----------------------------------------------------------------------------------------
  51
  52 function check_page_security($page_security)
  53 {
  54         global $SysPrefs;
  55
  56         $msg = '';
  57
  58         if (!$_SESSION["wa_current_user"]->check_user_access())
  59         {
  60                 // notification after upgrade from pre-2.2 version
  61                 $msg = $_SESSION["wa_current_user"]->old_db ?
  62                          _("Security settings have not been defined for your user account.")
  63                                 . "<br>" . _("Please contact your system administrator.")
  64                         : _("Please remove \$security_groups and \$security_headings arrays from config.php file!");
  65         } elseif (!$_SESSION['SysPrefs']->db_ok && !$_SESSION["wa_current_user"]->can_access('SA_SOFTWAREUPGRADE')) {
  66                 $msg = _('Access to application has been blocked until database upgrade is completed by system administrator.');
  67         }
  68
  69         if ($msg){
  70                 display_error($msg);
  71                 end_page();
  72                 kill_login();
  73                 exit;
  74         }
  75
  76         if (!$_SESSION["wa_current_user"]->can_access_page($page_security))
  77         {
  78
  79                 echo "<center><br><br><br><b>";
  80                 echo _("The security settings on your account do not permit you to access this function");
  81                 echo "</b>";
  82                 echo "<br><br><br><br></center>";
  83                 end_page();
  84                 exit;
  85         }
  86         if (!$_SESSION['SysPrefs']->db_ok
  87                 && !in_array($page_security, array('SA_SOFTWAREUPGRADE', 'SA_OPEN', 'SA_BACKUP')))
  88         {
  89                 display_error(_('System is blocked after source upgrade until database is updated on System/Software Upgrade page'));
  90                 end_page();
  91                 exit;
  92         }
  93
  94 }
  95 /*
  96         Helper function for setting page security level depeding on
  97         GET start variable and/or some value stored in session variable.
  98         Before the call $page_security should be set to default page_security value.
  99 */
 100 function set_page_security($value=null, $trans = array(), $gtrans = array())
 101 {
 102         global $page_security;
 103
 104         // first check is this is not start page call
 105         foreach($gtrans as $key => $area)
 106                 if (isset($_GET[$key])) {
 107                         $page_security = $area;
 108                         return;
 109                 }
 110
 111         // then check session value
 112         if (isset($trans[$value])) {
 113                 $page_security = $trans[$value];
 114                 return;
 115         }
 116 }
 117
 118 //-----------------------------------------------------------------------------
 119 //      Removing magic quotes from nested arrays/variables
 120 //
 121 function strip_quotes($data)
 122 {
 123         if(get_magic_quotes_gpc()) {
 124                 if(is_array($data)) {
 125                         foreach($data as $k => $v) {
 126                                 $data[$k] = strip_quotes($data[$k]);
 127                         }
 128                 } else
 129                         return stripslashes($data);
 130         }
 131         return $data;
 132 }
 133
 134 function html_cleanup(&$parms)
 135 {
 136         foreach($parms as $name => $value) {
 137 //              $value = @html_entity_decode($value, ENT_QUOTES, $_SESSION['language']->encoding);
 138                 if (is_array($value))
 139                         html_cleanup($parms[$name]);
 140                 else
 141                         $parms[$name] = @htmlspecialchars($value, ENT_QUOTES, $_SESSION['language']->encoding);
 142         }
 143         reset($parms); // needed for direct key() usage later throughout the sources
 144 }
 145
 146 //============================================================================
 147 //
 148 //
 149 function login_timeout()
 150 {
 151         // skip timeout on logout page
 152         if ($_SESSION["wa_current_user"]->logged) {
 153                 $tout = $_SESSION["wa_current_user"]->timeout;
 154                 if ($tout && (time() > $_SESSION["wa_current_user"]->last_act + $tout))
 155                 {
 156                         $_SESSION["wa_current_user"]->logged = false;
 157                 }
 158                 $_SESSION["wa_current_user"]->last_act = time();
 159         }
 160 }
 161 //============================================================================
 162 if (!isset($path_to_root))
 163 {
 164         $path_to_root = ".";
 165 }
 166
 167 // Prevent register_globals vulnerability
 168 if (isset($_GET['path_to_root']) || isset($_POST['path_to_root']))
 169         die("Restricted access");
 170
 171 include_once($path_to_root . "/includes/current_user.inc");
 172 include_once($path_to_root . "/frontaccounting.php");
 173 include_once($path_to_root . "/admin/db/security_db.inc");
 174 include_once($path_to_root . "/includes/lang/language.php");
 175 include_once($path_to_root . "/config_db.php");
 176 include_once($path_to_root . "/includes/ajax.inc");
 177 include_once($path_to_root . "/includes/ui/ui_msgs.inc");
 178 include_once($path_to_root . "/includes/prefs/sysprefs.inc");
 179
 180 /*
 181         Uncomment the setting below when using FA on shared hosting
 182         to avoid unexpeced session timeouts.
 183         Make sure this directory exists and is writable!
 184 */
 185 //ini_set('session.save_path', dirname(__FILE__).'/../tmp/');
 186
 187 ini_set('session.gc_maxlifetime', 36000); // 10hrs
 188
 189 session_name('FA'.md5(dirname(__FILE__)));
 190 //include_once($path_to_root.'/modules/www_statistics/includes/db_sessions.inc');
 191 session_start();
 192
 193 // this is to fix the "back-do-you-want-to-refresh" issue - thanx PHPFreaks
 194 header("Cache-control: private");
 195
 196 include_once($path_to_root . "/config.php");
 197 get_text_init();
 198
 199 // Page Initialisation
 200 if (!isset($_SESSION['language']) || !method_exists($_SESSION['language'], 'set_language'))
 201 {
 202         $l = array_search_value($dflt_lang, $installed_languages,  'code');
 203         $_SESSION['language'] = new language($l['name'], $l['code'], $l['encoding'],
 204          (isset($l['rtl']) && $l['rtl'] === true) ? 'rtl' : 'ltr');
 205 }
 206
 207 $_SESSION['language']->set_language($_SESSION['language']->code);
 208
 209 include_once($path_to_root . "/includes/hooks.inc");
 210
 211 $Hooks = array();
 212 // include current langauge related $Hooks object if locale file exists
 213 if (file_exists($path_to_root . "/lang/".$_SESSION['language']->code."/locale.inc"))
 214 {
 215         include_once($path_to_root . "/lang/".$_SESSION['language']->code."/locale.inc");
 216         $Hooks[] = new Hooks();
 217 }
 218
 219 include_once($path_to_root . "/includes/access_levels.inc");
 220 include_once($path_to_root . "/version.php");
 221 include_once($path_to_root . "/includes/main.inc");
 222
 223 // Ajax communication object
 224 $Ajax = new Ajax();
 225
 226 // js/php validation rules container
 227 $Validate = array();
 228 // bindings for editors
 229 $Editors = array();
 230 // page help. Currently help for function keys.
 231 $Pagehelp = array();
 232
 233 $Refs = new references();
 234
 235 // intercept all output to destroy it in case of ajax call
 236 register_shutdown_function('end_flush');
 237 ob_start('output_html',0);
 238
 239 // colect all error msgs
 240 set_error_handler('error_handler' /*, errtypes */);
 241
 242 if (!isset($_SESSION["wa_current_user"]))
 243         $_SESSION["wa_current_user"] = new current_user();
 244
 245 html_cleanup($_GET);
 246 html_cleanup($_POST);
 247 html_cleanup($_REQUEST);
 248
 249 // logout.php is the only page we should have always
 250 // accessable regardless of access level and current login status.
 251 if (strstr($_SERVER['PHP_SELF'], 'logout.php') == false){
 252
 253         login_timeout();
 254
 255         if (!$_SESSION["wa_current_user"]->logged_in())
 256         {
 257                 // Show login screen
 258                 if (!isset($_POST["user_name_entry_field"]) or $_POST["user_name_entry_field"] == "")
 259                 {
 260                         // strip ajax marker from uri, to force synchronous page reload
 261                         $_SESSION['timeout'] = array( 'uri'=>preg_replace('/JsHttpRequest=(?:(\d+)-)?([^&]+)/s',
 262                                         '', @htmlspecialchars($_SERVER['REQUEST_URI'], ENT_QUOTES, $_SESSION['language']->encoding)),
 263                                 'post' => $_POST);
 264
 265                         include($path_to_root . "/access/login.php");
 266                         if (in_ajax())
 267                                 $Ajax->activate('_page_body');
 268                         exit;
 269                 } else {
 270
 271                         $succeed = isset($db_connections[$_POST["company_login_name"]]) &&
 272                                 $_SESSION["wa_current_user"]->login($_POST["company_login_name"],
 273                                 $_POST["user_name_entry_field"], md5($_POST["password"]));
 274                         // select full vs fallback ui mode on login
 275                         $_SESSION["wa_current_user"]->ui_mode = $_POST['ui_mode'];
 276                         if (!$succeed)
 277                         {
 278                         // Incorrect password
 279                                 login_fail();
 280                         }
 281                         $lang = &$_SESSION['language'];
 282                         $lang->set_language($_SESSION['language']->code);
 283                 }
 284         } else
 285                 set_global_connection();
 286
 287         if (!$_SESSION["wa_current_user"]->old_db)
 288                 include_once($path_to_root . '/company/'.user_company().'/installed_extensions.php');
 289
 290         if (!isset($_SESSION["App"])) {
 291                 $_SESSION["App"] = new front_accounting();
 292                 $_SESSION["App"]->init();
 293         }
 294 }
 295
 296 $SysPrefs = &$_SESSION['SysPrefs'];
 297
 298 // POST vars cleanup needed for direct reuse.
 299 // We quote all values later with db_escape() before db update.
 300 $_POST = strip_quotes($_POST);
 301
 302 ?>