include/init.php

   1 <?php
   2
   3 /**
   4  * init.php -- initialisation file
   5  *
   6  * File should be loaded in every file in src/ or plugins that occupate an entire frame
   7  *
   8  * @copyright &copy; 2006 The SquirrelMail Project Team
   9  * @license http://opensource.org/licenses/gpl-license.php GNU Public License
  10  * @version $Id$
  11  * @package squirrelmail
  12  */
  13
  14 /**
  15  * This is a development version so in order to track programmer mistakes we
  16  * set the error reporting to E_ALL
  17  */
  18 error_reporting(E_ALL);
  19
  20
  21 /**
  22  * If register_globals are on, unregister globals.
  23  * Second test covers boolean set as string (php_value register_globals off).
  24  */
  25 if ((bool) ini_get('register_globals') &&
  26     strtolower(ini_get('register_globals'))!='off') {
  27     /**
  28      * Remove all globals that are not reserved by PHP
  29      * 'value' and 'key' are used by foreach. Don't unset them inside foreach.
  30      */
  31     foreach ($GLOBALS as $key => $value) {
  32         switch($key) {
  33         case 'HTTP_POST_VARS':
  34         case '_POST':
  35         case 'HTTP_GET_VARS':
  36         case '_GET':
  37         case 'HTTP_COOKIE_VARS':
  38         case '_COOKIE':
  39         case 'HTTP_SERVER_VARS':
  40         case '_SERVER':
  41         case 'HTTP_ENV_VARS':
  42         case '_ENV':
  43         case 'HTTP_POST_FILES':
  44         case '_FILES':
  45         case '_REQUEST':
  46         case 'HTTP_SESSION_VARS':
  47         case '_SESSION':
  48         case 'GLOBALS':
  49         case 'key':
  50         case 'value':
  51             break;
  52         case 'sInitLocation':
  53             // FIXME: variable must be set only in src/login.php
  54             break;
  55         default:
  56             unset($GLOBALS[$key]);
  57         }
  58     }
  59     // Unset variables used in foreach
  60     unset($GLOBALS['key']);
  61     unset($GLOBALS['value']);
  62 }
  63
  64 /**
  65  * Used as a dummy value, e.g., for passing as an empty
  66  * hook argument.
  67  */
  68 global $null;
  69 $null = NULL;
  70
  71 /**
  72  * [#1518885] session.use_cookies = off breaks SquirrelMail
  73  *
  74  * When session cookies are not used, all http redirects, meta refreshes,
  75  * src/download.php and javascript URLs are broken. Setting must be set
  76  * before session is started.
  77  */
  78 if (!(bool)ini_get('session.use_cookies') ||
  79     ini_get('session.use_cookies') == 'off') {
  80     ini_set('session.use_cookies','1');
  81 }
  82
  83 /**
  84  * calculate SM_PATH and calculate the base_uri
  85  * assumptions made: init.php is only called from plugins or from the src dir.
  86  * files in the plugin directory may not be part of a subdirectory called "src"
  87  *
  88  */
  89 if (isset($_SERVER['SCRIPT_NAME'])) {
  90     $a = explode('/',$_SERVER['SCRIPT_NAME']);
  91 } elseif (isset($HTTP_SERVER_VARS['SCRIPT_NAME'])) {
  92     $a = explode('/',$HTTP_SERVER_VARS['SCRIPT_NAME']);
  93 } else {
  94     $error = 'Unable to detect script environment. '
  95         .'Please test your PHP settings and send PHP core config, $_SERVER '
  96         .'and $HTTP_SERVER_VARS to SquirrelMail developers.';
  97     die($error);
  98 }
  99 $sSM_PATH = '';
 100 for($i = count($a) -2;$i > -1; --$i) {
 101     $sSM_PATH .= '../';
 102     if ($a[$i] === 'src' || $a[$i] === 'plugins') {
 103         break;
 104     }
 105 }
 106
 107 $base_uri = implode('/',array_slice($a,0,$i)). '/';
 108
 109 define('SM_PATH',$sSM_PATH);
 110 define('SM_BASE_URI', $base_uri);
 111 /**
 112  * global var $bInit is used to check if initialisation took place.
 113  * At this moment it's a workarounf for the include of addrbook_search_html
 114  * inside compose.php. If we found a better way then remove this. Do only use
 115  * this var if you know for sure a page can be called stand alone and be included
 116  * in another file.
 117  */
 118 $bInit = true;
 119
 120 /**
 121  * This theme as a failsafe if no themes were found, or if we error
 122  * out before anything could be initialised.
 123  */
 124 $color = array();
 125 $color[0]  = '#DCDCDC';  /* light gray    TitleBar               */
 126 $color[1]  = '#800000';  /* red                                  */
 127 $color[2]  = '#CC0000';  /* light red     Warning/Error Messages */
 128 $color[3]  = '#A0B8C8';  /* green-blue    Left Bar Background    */
 129 $color[4]  = '#FFFFFF';  /* white         Normal Background      */
 130 $color[5]  = '#FFFFCC';  /* light yellow  Table Headers          */
 131 $color[6]  = '#000000';  /* black         Text on left bar       */
 132 $color[7]  = '#0000CC';  /* blue          Links                  */
 133 $color[8]  = '#000000';  /* black         Normal text            */
 134 $color[9]  = '#ABABAB';  /* mid-gray      Darker version of #0   */
 135 $color[10] = '#666666';  /* dark gray     Darker version of #9   */
 136 $color[11] = '#770000';  /* dark red      Special Folders color  */
 137 $color[12] = '#EDEDED';
 138 $color[13] = '#800000';  /* (dark red)    Color for quoted text -- > 1 quote */
 139 $color[14] = '#ff0000';  /* (red)         Color for quoted text -- >> 2 or more */
 140 $color[15] = '#002266';  /* (dark blue)   Unselectable folders */
 141 $color[16] = '#ff9933';  /* (orange)      Highlight color */
 142
 143 require(SM_PATH . 'functions/global.php');
 144 require(SM_PATH . 'functions/arrays.php');
 145
 146 /* load default configuration */
 147 require(SM_PATH . 'config/config_default.php');
 148 /* reset arrays in default configuration */
 149 $ldap_server = array();
 150 $plugins = array();
 151 $fontsets = array();
 152 $aTemplateSet = array();
 153 $aTemplateSet[0]['ID'] = 'default';
 154 $aTemplateSet[0]['NAME'] = 'Default';
 155
 156 /* load site configuration */
 157 require(SM_PATH . 'config/config.php');
 158 /* load local configuration overrides */
 159 if (file_exists(SM_PATH . 'config/config_local.php')) {
 160     require(SM_PATH . 'config/config_local.php');
 161 }
 162
 163 require(SM_PATH . 'functions/plugin.php');
 164 require(SM_PATH . 'include/constants.php');
 165 require(SM_PATH . 'include/languages.php');
 166 require(SM_PATH . 'class/template/Template.class.php');
 167 require(SM_PATH . 'class/error.class.php');
 168
 169 /**
 170  * If magic_quotes_runtime is on, SquirrelMail breaks in new and creative ways.
 171  * Force magic_quotes_runtime off.
 172  * tassium@squirrelmail.org - I put it here in the hopes that all SM code includes this.
 173  * If there's a better place, please let me know.
 174  */
 175 ini_set('magic_quotes_runtime','0');
 176
 177
 178 /* if running with magic_quotes_gpc then strip the slashes
 179    from POST and GET global arrays */
 180 if (get_magic_quotes_gpc()) {
 181     sqstripslashes($_GET);
 182     sqstripslashes($_POST);
 183 }
 184
 185
 186 /* strip any tags added to the url from PHP_SELF.
 187 This fixes hand crafted url XXS expoits for any
 188    page that uses PHP_SELF as the FORM action */
 189 $_SERVER['PHP_SELF'] = strip_tags($_SERVER['PHP_SELF']);
 190
 191 $PHP_SELF = php_self();
 192
 193 /**
 194  * Initialize the session
 195  */
 196
 197 /** set the name of the session cookie */
 198 if (!isset($session_name) || !$session_name) {
 199     $session_name = 'SQMSESSID';
 200 }
 201
 202 /**
 203  * if session.auto_start is On then close the session
 204  */
 205 $sSessionAutostartName = session_name();
 206 if ((isset($sSessionAutostartName) || $sSessionAutostartName == '') &&
 207      $sSessionAutostartName !== $session_name) {
 208     $sCookiePath = ini_get('session.cookie_path');
 209     $sCookieDomain = ini_get('session.cookie_domain');
 210     // reset the cookie
 211     setcookie($sSessionAutostartName,'',time() - 604800,$sCookiePath,$sCookieDomain);
 212     @session_destroy();
 213     session_write_close();
 214 }
 215
 216 /**
 217  * includes from classes stored in the session
 218  */
 219 require(SM_PATH . 'class/mime.class.php');
 220
 221 ini_set('session.name' , $session_name);
 222 session_set_cookie_params (0, $base_uri);
 223 sqsession_is_active();
 224
 225 /**
 226  * SquirrelMail version number -- DO NOT CHANGE
 227  */
 228 $version = '1.5.2 [SVN]';
 229
 230 /**
 231  * SquirrelMail internal version number -- DO NOT CHANGE
 232  * $sm_internal_version = array (release, major, minor)
 233  */
 234 $SQM_INTERNAL_VERSION = array(1,5,2);
 235
 236
 237 /* if plugins are disabled only for one user and
 238  * the current user is NOT that user, turn them
 239  * back on
 240  */
 241 sqgetGlobalVar('username',$username,SQ_SESSION);
 242 if ($disable_plugins && !empty($disable_plugins_user)
 243  && $username != $disable_plugins_user) {
 244     $disable_plugins = false;
 245 }
 246
 247 /* remove all plugins if they are disabled */
 248 if ($disable_plugins) {
 249    $plugins = array();
 250 }
 251
 252
 253 /**
 254  * Include Compatibility plugin if available.
 255  */
 256 if (!$disable_plugins && file_exists(SM_PATH . 'plugins/compatibility/functions.php'))
 257     include_once(SM_PATH . 'plugins/compatibility/functions.php');
 258
 259 /**
 260  * MAIN PLUGIN LOADING CODE HERE
 261  * On init, we no longer need to load all plugin setup files.
 262  * Now, we load the statically generated hook registrations here
 263  * and let the hook calls include only the plugins needed.
 264  */
 265 $squirrelmail_plugin_hooks = array();
 266 if (!$disable_plugins && file_exists(SM_PATH . 'config/plugin_hooks.php')) {
 267     require(SM_PATH . 'config/plugin_hooks.php');
 268 }
 269
 270 /**
 271  * allow plugins to override main configuration; hook is placed
 272  * here to allow plugins to use session information to do their work
 273  */
 274 do_hook('config_override', $null);
 275
 276 /**
 277  * DISABLED.
 278  * Remove globalized session data in rg=on setups
 279  *
 280  * Code can be utilized when session is started, but data is not loaded.
 281  * We have already loaded configuration and other important vars. Can't
 282  * clean session globals here.
 283 if ((bool) @ini_get('register_globals') &&
 284     strtolower(ini_get('register_globals'))!='off') {
 285     foreach ($_SESSION as $key => $value) {
 286         unset($GLOBALS[$key]);
 287     }
 288 }
 289 */
 290
 291 sqsession_register(SM_BASE_URI,'base_uri');
 292
 293 /**
 294  * Retrieve the language cookie
 295  */
 296 if (! sqgetGlobalVar('squirrelmail_language',$squirrelmail_language,SQ_COOKIE)) {
 297     $squirrelmail_language = '';
 298 }
 299
 300
 301 /**
 302  * @var $sInitlocation From where do we include.
 303  */
 304 if (!isset($sInitLocation)) {
 305     $sInitLocation=NULL;
 306 }
 307
 308 switch ($sInitLocation) {
 309     case 'style':
 310
 311         // need to get the right template set up
 312         //
 313         sqGetGlobalVar('templateid', $templateid, SQ_GET);
 314
 315         // sanitize just in case...
 316         //
 317         $templateid = preg_replace('/(\.\.\/){1,}/', '', $templateid);
 318
 319         // make sure given template actually is available
 320         //
 321         $found_templateset = false;
 322         for ($i = 0; $i < count($aTemplateSet); ++$i) {
 323             if ($aTemplateSet[$i]['ID'] == $templateid) {
 324                 $found_templateset = true;
 325                 break;
 326             }
 327         }
 328
 329 // FIXME: do we need/want to check here for actual (physical) presence of template sets?
 330         // selected template not available, fall back to default template
 331         //
 332         if (!$found_templateset) {
 333             $sTemplateID = Template::get_default_template_set();
 334         } else {
 335             $sTemplateID = $templateid;
 336         }
 337
 338         session_write_close();
 339         break;
 340
 341     case 'redirect':
 342         /**
 343          * directory hashing functions are needed for all setups in case
 344          * plugins use own pref files.
 345          */
 346         require(SM_PATH . 'functions/prefs.php');
 347         require(SM_PATH . 'functions/auth.php');
 348         /* hook loads custom prefs backend plugins */
 349         $prefs_backend = do_hook('prefs_backend', $null);
 350         if (isset($prefs_backend) && !empty($prefs_backend) && file_exists(SM_PATH . $prefs_backend)) {
 351             require(SM_PATH . $prefs_backend);
 352         } elseif (isset($prefs_dsn) && !empty($prefs_dsn)) {
 353             require(SM_PATH . 'functions/db_prefs.php');
 354         } else {
 355             require(SM_PATH . 'functions/file_prefs.php');
 356         }
 357         //nobreak;
 358     case 'login':
 359         require(SM_PATH . 'functions/display_messages.php' );
 360         require(SM_PATH . 'functions/page_header.php');
 361         require(SM_PATH . 'functions/html.php');
 362
 363         // reset template file cache
 364         //
 365         $sTemplateID = Template::get_default_template_set();
 366         Template::cache_template_file_hierarchy(TRUE);
 367
 368         /**
 369          * Make sure icon variables are setup for the login page.
 370          */
 371         $icon_theme = $icon_themes[$icon_theme_def]['PATH'];
 372         /*
 373          * NOTE: The $icon_theme_path var should contain the path to the icon
 374          *       theme to use.  If the admin has disabled icons, or the user has
 375          *       set the icon theme to "None," no icons will be used.
 376          */
 377         $icon_theme_path = (!$use_icons || $icon_theme=='none') ? NULL : ($icon_theme == 'template' ? SM_PATH . Template::calculate_template_images_directory($sTemplateID) : $icon_theme);
 378
 379         /**
 380          * cleanup old cookies with a cookie path the same as the standard php.ini
 381          * cookie path. All previous SquirrelMail version used the standard php.ini
 382          * cookie path for storing the session name. That behaviour changed.
 383          */
 384         if ($sCookiePath !== SM_BASE_URI) {
 385             /**
 386              * do not delete the standard sessions with session.name is i.e. PHPSESSID
 387              * because they probably belong to other php apps
 388              */
 389             if (ini_get('session.name') !== $sSessionAutostartName) {
 390                 //  This does not work. Sometimes the cookie with SQSESSID=deleted and path /
 391                 // is picked up in webmail.php => login will fail
 392                 //sqsetcookie(ini_get('session.name'),'',0,$sCookiePath);
 393             }
 394         }
 395         break;
 396     default:
 397         require(SM_PATH . 'functions/display_messages.php' );
 398         require(SM_PATH . 'functions/page_header.php');
 399         require(SM_PATH . 'functions/html.php');
 400         require(SM_PATH . 'functions/strings.php');
 401
 402
 403         /**
 404          * Check if we are logged in
 405          */
 406         require(SM_PATH . 'functions/auth.php');
 407
 408         if ( !sqsession_is_registered('user_is_logged_in') ) {
 409             //  First we store some information in the new session to prevent
 410             //  information-loss.
 411             //
 412             $session_expired_post = $_POST;
 413             $session_expired_location = $PHP_SELF;
 414             if (!sqsession_is_registered('session_expired_post')) {
 415                 sqsession_register($session_expired_post,'session_expired_post');
 416             }
 417             if (!sqsession_is_registered('session_expired_location')) {
 418                 sqsession_register($session_expired_location,'session_expired_location');
 419             }
 420             // signout page will deal with users who aren't logged
 421             // in on its own; don't show error here
 422             //
 423             if (strpos($PHP_SELF, 'signout.php') !== FALSE) {
 424             return;
 425             }
 426
 427             /**
 428              * Initialize the template object (logout_error uses it)
 429              */
 430             /*
 431              * $sTemplateID is not initialized when a user is not logged in, so we
 432              * will use the config file defaults here.  If the neccesary variables
 433              * are net set, force a default value.
 434              */
 435             $sTemplateID = Template::get_default_template_set();
 436             $oTemplate = Template::construct_template($sTemplateID);
 437
 438             set_up_language($squirrelmail_language, true);
 439             logout_error( _("You must be logged in to access this page.") );
 440             exit;
 441         }
 442
 443 //FIXME: remove next line if the placement of the copy of this line above does not prove to be problematic
 444         sqgetGlobalVar('username',$username,SQ_SESSION);
 445         sqgetGlobalVar('authz',$authz,SQ_SESSION);
 446
 447         /**
 448          * Setting the prefs backend
 449          */
 450         sqgetGlobalVar('prefs_cache', $prefs_cache, SQ_SESSION );
 451         sqgetGlobalVar('prefs_are_cached', $prefs_are_cached, SQ_SESSION );
 452
 453         if ( !sqsession_is_registered('prefs_are_cached') ||
 454             !isset( $prefs_cache) ||
 455             !is_array( $prefs_cache)) {
 456             $prefs_are_cached = false;
 457             $prefs_cache = false; //array();
 458         }
 459
 460         /* see 'redirect' case */
 461         require(SM_PATH . 'functions/prefs.php');
 462
 463         $prefs_backend = do_hook('prefs_backend', $null);
 464         if (isset($prefs_backend) && !empty($prefs_backend) && file_exists(SM_PATH . $prefs_backend)) {
 465             require(SM_PATH . $prefs_backend);
 466         } elseif (isset($prefs_dsn) && !empty($prefs_dsn)) {
 467             require(SM_PATH . 'functions/db_prefs.php');
 468         } else {
 469             require(SM_PATH . 'functions/file_prefs.php');
 470         }
 471
 472         /**
 473          * initializing user settings
 474          */
 475         require(SM_PATH . 'include/load_prefs.php');
 476
 477 // i do not understand the frames language cookie story
 478         /**
 479          * We'll need this to later have a noframes version
 480          *
 481          * Check if the user has a language preference, but no cookie.
 482          * Send him a cookie with his language preference, if there is
 483          * such discrepancy.
 484          */
 485          $my_language = getPref($data_dir, $username, 'language');
 486          if ($my_language != $squirrelmail_language) {
 487              sqsetcookie('squirrelmail_language', $my_language, time()+2592000, $base_uri);
 488          }
 489 // /dont understand
 490
 491         /**
 492          * Set up the language.
 493          */
 494         $err=set_up_language(getPref($data_dir, $username, 'language'));
 495
 496         // Japanese translation used without mbstring support
 497         if ($err==2) {
 498             $sError =
 499                 "<p>You need to have PHP installed with the multibyte string function \n".
 500                 "enabled (using configure option --enable-mbstring).</p>\n".
 501                 "<p>System assumed that you accidently switched to Japanese translation \n".
 502                 "and reverted your language preference to English.</p>\n".
 503                 "<p>Please refresh this page in order to use webmail.</p>\n";
 504             error_box($sError);
 505         }
 506
 507         $timeZone = getPref($data_dir, $username, 'timezone');
 508
 509         /* Check to see if we are allowed to set the TZ environment variable.
 510          * We are able to do this if ...
 511          *   safe_mode is disabled OR
 512          *   safe_mode_allowed_env_vars is empty (you are allowed to set any) OR
 513          *   safe_mode_allowed_env_vars contains TZ
 514          */
 515         $tzChangeAllowed = (!ini_get('safe_mode')) ||
 516                             !strcmp(ini_get('safe_mode_allowed_env_vars'),'') ||
 517                             preg_match('/^([\w_]+,)*TZ/', ini_get('safe_mode_allowed_env_vars'));
 518
 519         if ( $timeZone != SMPREF_NONE && ($timeZone != "")
 520             && $tzChangeAllowed ) {
 521
 522             // get time zone key, if strict or custom strict timezones are used
 523             if (isset($time_zone_type) &&
 524                 ($time_zone_type == 1 || $time_zone_type == 3)) {
 525                 /* load time zone functions */
 526                 require(SM_PATH . 'include/timezones.php');
 527                 $realTimeZone = sq_get_tz_key($timeZone);
 528             } else {
 529                 $realTimeZone = $timeZone;
 530             }
 531
 532             // set time zone
 533             if ($realTimeZone) {
 534                 putenv("TZ=".$realTimeZone);
 535             }
 536         }
 537
 538         /**
 539          * php 5.1.0 added time zone functions. Set time zone with them in order
 540          * to prevent E_STRICT notices and allow time zone modifications in safe_mode.
 541          */
 542         if (function_exists('date_default_timezone_set')) {
 543             if ($timeZone != SMPREF_NONE && $timeZone != "") {
 544                 date_default_timezone_set($timeZone);
 545             } else {
 546                 // interface runs on server's time zone. Remove php E_STRICT complains
 547                 $default_timezone = @date_default_timezone_get();
 548                 date_default_timezone_set($default_timezone);
 549             }
 550         }
 551         break;
 552 }
 553
 554 /*
 555  * $sTemplateID is not initialized when a user is not logged in, so we
 556  * will use the config file defaults here.  If the neccesary variables
 557  * are not set, force a default value.
 558  *
 559  * If the user is logged in, $sTemplateID will be set in load_prefs.php,
 560  * so we shouldn't change it here.
 561  */
 562 if (!isset($sTemplateID)) {
 563     $sTemplateID = Template::get_default_template_set();
 564     $icon_theme_path = !$use_icons ? NULL : Template::calculate_template_images_directory($sTemplateID);
 565 }
 566
 567 // template object may have already been constructed in load_prefs.php
 568 //
 569 if (empty($oTemplate)) {
 570     $oTemplate = Template::construct_template($sTemplateID);
 571 }
 572
 573 // We want some variables to always be available to the template
 574 $oTemplate->assign('javascript_on', checkForJavascript());
 575 $oTemplate->assign('base_uri', sqm_baseuri());
 576 $always_include = array('sTemplateID', 'icon_theme_path');
 577 foreach ($always_include as $var) {
 578     $oTemplate->assign($var, (isset($$var) ? $$var : NULL));
 579 }
 580
 581 /**
 582  * Initialize our custom error handler object
 583  */
 584 $oErrorHandler = new ErrorHandler($oTemplate,'error_message.tpl');
 585
 586 /**
 587  * Activate custom error handling
 588  */
 589 if (version_compare(PHP_VERSION, "4.3.0", ">=")) {
 590     $oldErrorHandler = set_error_handler(array($oErrorHandler, 'SquirrelMailErrorhandler'));
 591 } else {
 592     $oldErrorHandler = set_error_handler('SquirrelMailErrorhandler');
 593 }
 594
 595 /**
 596  * Javascript support detection function
 597  * @param boolean $reset recheck javascript support if set to true.
 598  * @return integer SMPREF_JS_ON or SMPREF_JS_OFF ({@see include/constants.php})
 599  * @since 1.5.1
 600  */
 601 function checkForJavascript($reset = FALSE) {
 602   global $data_dir, $username, $javascript_on, $javascript_setting;
 603
 604   if ( !$reset && sqGetGlobalVar('javascript_on', $javascript_on, SQ_SESSION) )
 605     return $javascript_on;
 606
 607   if ( ( $reset || !isset($javascript_setting) )
 608     // getPref() not defined (nor is it meaningful) when user not
 609     // logged in, but that begs the question if $javascript_on is
 610     // not in the session in that case, where do we get it from?
 611     && ( sqGetGlobalVar('user_is_logged_in', $user_is_logged_in, SQ_SESSION)
 612       && $user_is_logged_in) )
 613     $javascript_setting = getPref($data_dir, $username, 'javascript_setting', SMPREF_JS_AUTODETECT);
 614
 615   if ( !sqGetGlobalVar('new_js_autodetect_results', $js_autodetect_results) &&
 616        !sqGetGlobalVar('js_autodetect_results', $js_autodetect_results) )
 617     $js_autodetect_results = SMPREF_JS_OFF;
 618
 619   if ( $javascript_setting == SMPREF_JS_AUTODETECT )
 620     $javascript_on = $js_autodetect_results;
 621   else
 622     $javascript_on = $javascript_setting;
 623
 624   sqsession_register($javascript_on, 'javascript_on');
 625   return $javascript_on;
 626 }
 627
 628 function sqm_baseuri() {
 629     global $base_uri;
 630     return $base_uri;
 631 }