| 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 © 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 | * Code requires PHP 4.1.0 or newer. |
| 24 | * Second test covers boolean set as string (php_value register_globals off). |
| 25 | */ |
| 26 | if ((bool) @ini_get('register_globals') && |
| 27 | strtolower(ini_get('register_globals'))!='off') { |
| 28 | /** |
| 29 | * Remove all globals from $_GET, $_POST, and $_COOKIE. |
| 30 | */ |
| 31 | foreach ($_REQUEST as $key => $value) { |
| 32 | unset($GLOBALS[$key]); |
| 33 | } |
| 34 | /** |
| 35 | * Remove globalized $_FILES variables |
| 36 | * Before 4.3.0 $_FILES are included in $_REQUEST. |
| 37 | * Unglobalize them in separate call in order to remove dependency |
| 38 | * on PHP version. |
| 39 | */ |
| 40 | foreach ($_FILES as $key => $value) { |
| 41 | unset($GLOBALS[$key]); |
| 42 | // there are three undocumented $_FILES globals. |
| 43 | unset($GLOBALS[$key.'_type']); |
| 44 | unset($GLOBALS[$key.'_name']); |
| 45 | unset($GLOBALS[$key.'_size']); |
| 46 | } |
| 47 | /** |
| 48 | * Remove globalized environment variables. |
| 49 | */ |
| 50 | foreach ($_ENV as $key => $value) { |
| 51 | unset($GLOBALS[$key]); |
| 52 | } |
| 53 | /** |
| 54 | * Remove globalized server variables. |
| 55 | */ |
| 56 | foreach ($_SERVER as $key => $value) { |
| 57 | unset($GLOBALS[$key]); |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | |
| 62 | /** |
| 63 | * calculate SM_PATH and calculate the base_uri |
| 64 | * assumptions made: init.php is only called from plugins or from the src dir. |
| 65 | * files in the plugin directory may not be part of a subdirectory called "src" |
| 66 | * |
| 67 | */ |
| 68 | if (isset($_SERVER['SCRIPT_NAME'])) { |
| 69 | $a = explode('/',$_SERVER['SCRIPT_NAME']); |
| 70 | } elseif (isset($HTTP_SERVER_VARS['SCRIPT_NAME'])) { |
| 71 | $a = explode('/',$_SERVER['SCRIPT_NAME']); |
| 72 | } |
| 73 | $sSM_PATH = ''; |
| 74 | for($i = count($a) -2;$i > -1; --$i) { |
| 75 | $sSM_PATH .= '../'; |
| 76 | if ($a[$i] === 'src' || $a[$i] === 'plugins') { |
| 77 | break; |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | $base_uri = implode('/',array_slice($a,0,$i)). '/'; |
| 82 | |
| 83 | define('SM_PATH',$sSM_PATH); |
| 84 | define('SM_BASE_URI', $base_uri); |
| 85 | /** |
| 86 | * global var $bInit is used to check if initialisation took place. |
| 87 | * At this moment it's a workarounf for the include of addrbook_search_html |
| 88 | * inside compose.php. If we found a better way then remove this. Do only use |
| 89 | * this var if you know for sure a page can be called stand alone and be included |
| 90 | * in another file. |
| 91 | */ |
| 92 | $bInit = true; |
| 93 | |
| 94 | require(SM_PATH . 'functions/global.php'); |
| 95 | require(SM_PATH . 'config/config.php'); |
| 96 | require(SM_PATH . 'functions/plugin.php'); |
| 97 | require(SM_PATH . 'include/constants.php'); |
| 98 | require(SM_PATH . 'include/languages.php'); |
| 99 | |
| 100 | /** |
| 101 | * If magic_quotes_runtime is on, SquirrelMail breaks in new and creative ways. |
| 102 | * Force magic_quotes_runtime off. |
| 103 | * tassium@squirrelmail.org - I put it here in the hopes that all SM code includes this. |
| 104 | * If there's a better place, please let me know. |
| 105 | */ |
| 106 | ini_set('magic_quotes_runtime','0'); |
| 107 | |
| 108 | |
| 109 | /* if running with magic_quotes_gpc then strip the slashes |
| 110 | from POST and GET global arrays */ |
| 111 | if (get_magic_quotes_gpc()) { |
| 112 | sqstripslashes($_GET); |
| 113 | sqstripslashes($_POST); |
| 114 | } |
| 115 | |
| 116 | |
| 117 | /* strip any tags added to the url from PHP_SELF. |
| 118 | This fixes hand crafted url XXS expoits for any |
| 119 | page that uses PHP_SELF as the FORM action */ |
| 120 | $_SERVER['PHP_SELF'] = strip_tags($_SERVER['PHP_SELF']); |
| 121 | |
| 122 | $PHP_SELF = php_self(); |
| 123 | |
| 124 | /** |
| 125 | * Initialize the session |
| 126 | */ |
| 127 | |
| 128 | /** set the name of the session cookie */ |
| 129 | if (!isset($session_name) || !$session_name) { |
| 130 | $session_name = 'SQMSESSID'; |
| 131 | } |
| 132 | |
| 133 | /** |
| 134 | * if session.auto_start is On then close the session |
| 135 | */ |
| 136 | $sSessionAutostartName = session_name(); |
| 137 | if ((isset($sSessionAutostartName) || $sSessionAutostartName == '') && |
| 138 | $sSessionAutostartName !== $session_name) { |
| 139 | $sCookiePath = ini_get('session.cookie_path'); |
| 140 | $sCookieDomain = ini_get('session.cookie_domain'); |
| 141 | // reset the cookie |
| 142 | setcookie($sSessionAutostartName,'',time() - 604800,$sCookiePath,$sCookieDomain); |
| 143 | @session_destroy(); |
| 144 | session_write_close(); |
| 145 | } |
| 146 | |
| 147 | /** |
| 148 | * includes from classes stored in the session |
| 149 | */ |
| 150 | require(SM_PATH . 'class/mime.class.php'); |
| 151 | |
| 152 | ini_set('session.name' , $session_name); |
| 153 | session_set_cookie_params (0, $base_uri); |
| 154 | sqsession_is_active(); |
| 155 | |
| 156 | /** |
| 157 | * DISABLED. |
| 158 | * Remove globalized session data in rg=on setups |
| 159 | * |
| 160 | * Code can be utilized when session is started, but data is not loaded. |
| 161 | * We have already loaded configuration and other important vars. Can't |
| 162 | * clean session globals here. |
| 163 | if ((bool) @ini_get('register_globals') && |
| 164 | strtolower(ini_get('register_globals'))!='off') { |
| 165 | foreach ($_SESSION as $key => $value) { |
| 166 | unset($GLOBALS[$key]); |
| 167 | } |
| 168 | } |
| 169 | */ |
| 170 | |
| 171 | sqsession_register(SM_BASE_URI,'base_uri'); |
| 172 | |
| 173 | /** |
| 174 | * SquirrelMail version number -- DO NOT CHANGE |
| 175 | */ |
| 176 | $version = '1.5.2 [CVS]'; |
| 177 | |
| 178 | /** |
| 179 | * SquirrelMail internal version number -- DO NOT CHANGE |
| 180 | * $sm_internal_version = array (release, major, minor) |
| 181 | */ |
| 182 | $SQM_INTERNAL_VERSION = array(1,5,2); |
| 183 | |
| 184 | /** |
| 185 | * Retrieve the language cookie |
| 186 | */ |
| 187 | if (! sqgetGlobalVar('squirrelmail_language',$squirrelmail_language,SQ_COOKIE)) { |
| 188 | $squirrelmail_language = ''; |
| 189 | } |
| 190 | |
| 191 | |
| 192 | /** |
| 193 | * @var $sInitlocation From where do we include. |
| 194 | */ |
| 195 | if (!isset($sInitLocation)) { |
| 196 | $sInitLocation=NULL; |
| 197 | } |
| 198 | |
| 199 | /** |
| 200 | * MAIN PLUGIN LOADING CODE HERE |
| 201 | */ |
| 202 | |
| 203 | /** |
| 204 | * Include Compatibility plugin if available. |
| 205 | */ |
| 206 | if (file_exists(SM_PATH . 'plugins/compatibility/functions.php')) |
| 207 | include_once(SM_PATH . 'plugins/compatibility/functions.php'); |
| 208 | $squirrelmail_plugin_hooks = array(); |
| 209 | |
| 210 | /* On init, register all plugins configured for use. */ |
| 211 | if (isset($plugins) && is_array($plugins)) { |
| 212 | // turn on output buffering in order to prevent output of new lines |
| 213 | ob_start(); |
| 214 | foreach ($plugins as $name) { |
| 215 | use_plugin($name); |
| 216 | } |
| 217 | // get output and remove whitespace |
| 218 | $output = trim(ob_get_contents()); |
| 219 | ob_end_clean(); |
| 220 | // if plugins output more than newlines and spacing, stop script execution. |
| 221 | if (!empty($output)) { |
| 222 | die($output); |
| 223 | } |
| 224 | } |
| 225 | |
| 226 | |
| 227 | switch ($sInitLocation) { |
| 228 | case 'style': session_write_close(); sqsetcookieflush(); break; |
| 229 | case 'redirect': |
| 230 | /** |
| 231 | * directory hashing functions are needed for all setups in case |
| 232 | * plugins use own pref files. |
| 233 | */ |
| 234 | require(SM_PATH . 'functions/prefs.php'); |
| 235 | /* hook loads custom prefs backend plugins */ |
| 236 | $prefs_backend = do_hook_function('prefs_backend'); |
| 237 | if (isset($prefs_backend) && !empty($prefs_backend) && file_exists(SM_PATH . $prefs_backend)) { |
| 238 | require(SM_PATH . $prefs_backend); |
| 239 | } elseif (isset($prefs_dsn) && !empty($prefs_dsn)) { |
| 240 | require(SM_PATH . 'functions/db_prefs.php'); |
| 241 | } else { |
| 242 | require(SM_PATH . 'functions/file_prefs.php'); |
| 243 | } |
| 244 | //nobreak; |
| 245 | case 'login': |
| 246 | require(SM_PATH . 'functions/display_messages.php' ); |
| 247 | require(SM_PATH . 'functions/page_header.php'); |
| 248 | require(SM_PATH . 'functions/html.php'); |
| 249 | /** |
| 250 | * cleanup old cookies with a cookie path the same as the standard php.ini |
| 251 | * cookie path. All previous SquirrelMail version used the standard php.ini |
| 252 | * cookie path for storing the session name. That behaviour changed. |
| 253 | */ |
| 254 | if ($sCookiePath !== SM_BASE_URI) { |
| 255 | /** |
| 256 | * do not delete the standard sessions with session.name is i.e. PHPSESSID |
| 257 | * because they probably belong to other php apps |
| 258 | */ |
| 259 | if (ini_get('session.name') !== $sSessionAutostartName) { |
| 260 | sqsetcookie(ini_get('session.name'),'',0,$sCookiePath); |
| 261 | } |
| 262 | } |
| 263 | break; |
| 264 | default: |
| 265 | require(SM_PATH . 'functions/display_messages.php' ); |
| 266 | require(SM_PATH . 'functions/page_header.php'); |
| 267 | require(SM_PATH . 'functions/html.php'); |
| 268 | require(SM_PATH . 'functions/strings.php'); |
| 269 | |
| 270 | |
| 271 | /** |
| 272 | * Check if we are logged in |
| 273 | */ |
| 274 | require(SM_PATH . 'functions/auth.php'); |
| 275 | |
| 276 | if ( !sqsession_is_registered('user_is_logged_in') ) { |
| 277 | // First we store some information in the new session to prevent |
| 278 | // information-loss. |
| 279 | // |
| 280 | $session_expired_post = $_POST; |
| 281 | $session_expired_location = $PHP_SELF; |
| 282 | if (!sqsession_is_registered('session_expired_post')) { |
| 283 | sqsession_register($session_expired_post,'session_expired_post'); |
| 284 | } |
| 285 | if (!sqsession_is_registered('session_expired_location')) { |
| 286 | sqsession_register($session_expired_location,'session_expired_location'); |
| 287 | } |
| 288 | // signout page will deal with users who aren't logged |
| 289 | // in on its own; don't show error here |
| 290 | // |
| 291 | if (strpos($PHP_SELF, 'signout.php') !== FALSE) { |
| 292 | return; |
| 293 | } |
| 294 | |
| 295 | set_up_language($squirrelmail_language, true); |
| 296 | logout_error( _("You must be logged in to access this page.") ); |
| 297 | exit; |
| 298 | } |
| 299 | |
| 300 | sqgetGlobalVar('username',$username,SQ_SESSION); |
| 301 | |
| 302 | /** |
| 303 | * Setting the prefs backend |
| 304 | */ |
| 305 | sqgetGlobalVar('prefs_cache', $prefs_cache, SQ_SESSION ); |
| 306 | sqgetGlobalVar('prefs_are_cached', $prefs_are_cached, SQ_SESSION ); |
| 307 | |
| 308 | if ( !sqsession_is_registered('prefs_are_cached') || |
| 309 | !isset( $prefs_cache) || |
| 310 | !is_array( $prefs_cache)) { |
| 311 | $prefs_are_cached = false; |
| 312 | $prefs_cache = false; //array(); |
| 313 | } |
| 314 | |
| 315 | /* see 'redirect' switch */ |
| 316 | require(SM_PATH . 'functions/prefs.php'); |
| 317 | |
| 318 | $prefs_backend = do_hook_function('prefs_backend'); |
| 319 | if (isset($prefs_backend) && !empty($prefs_backend) && file_exists(SM_PATH . $prefs_backend)) { |
| 320 | require(SM_PATH . $prefs_backend); |
| 321 | } elseif (isset($prefs_dsn) && !empty($prefs_dsn)) { |
| 322 | require(SM_PATH . 'functions/db_prefs.php'); |
| 323 | } else { |
| 324 | require(SM_PATH . 'functions/file_prefs.php'); |
| 325 | } |
| 326 | |
| 327 | /** |
| 328 | * initializing user settings |
| 329 | */ |
| 330 | require(SM_PATH . 'include/load_prefs.php'); |
| 331 | |
| 332 | |
| 333 | // i do not understand the frames language cookie story |
| 334 | /** |
| 335 | * We'll need this to later have a noframes version |
| 336 | * |
| 337 | * Check if the user has a language preference, but no cookie. |
| 338 | * Send him a cookie with his language preference, if there is |
| 339 | * such discrepancy. |
| 340 | */ |
| 341 | $my_language = getPref($data_dir, $username, 'language'); |
| 342 | if ($my_language != $squirrelmail_language) { |
| 343 | sqsetcookie('squirrelmail_language', $my_language, time()+2592000, $base_uri); |
| 344 | } |
| 345 | // /dont understand |
| 346 | |
| 347 | /** |
| 348 | * Set up the language. |
| 349 | */ |
| 350 | $err=set_up_language(getPref($data_dir, $username, 'language')); |
| 351 | /* this is the last cookie we set so flush it. */ |
| 352 | sqsetcookieflush(); |
| 353 | |
| 354 | // Japanese translation used without mbstring support |
| 355 | if ($err==2) { |
| 356 | $sError = |
| 357 | "<p>You need to have PHP installed with the multibyte string function \n". |
| 358 | "enabled (using configure option --enable-mbstring).</p>\n". |
| 359 | "<p>System assumed that you accidently switched to Japanese translation \n". |
| 360 | "and reverted your language preference to English.</p>\n". |
| 361 | "<p>Please refresh this page in order to use webmail.</p>\n"; |
| 362 | error_box($sError); |
| 363 | } |
| 364 | |
| 365 | $timeZone = getPref($data_dir, $username, 'timezone'); |
| 366 | |
| 367 | /* Check to see if we are allowed to set the TZ environment variable. |
| 368 | * We are able to do this if ... |
| 369 | * safe_mode is disabled OR |
| 370 | * safe_mode_allowed_env_vars is empty (you are allowed to set any) OR |
| 371 | * safe_mode_allowed_env_vars contains TZ |
| 372 | */ |
| 373 | $tzChangeAllowed = (!ini_get('safe_mode')) || |
| 374 | !strcmp(ini_get('safe_mode_allowed_env_vars'),'') || |
| 375 | preg_match('/^([\w_]+,)*TZ/', ini_get('safe_mode_allowed_env_vars')); |
| 376 | |
| 377 | if ( $timeZone != SMPREF_NONE && ($timeZone != "") |
| 378 | && $tzChangeAllowed ) { |
| 379 | |
| 380 | // get time zone key, if strict or custom strict timezones are used |
| 381 | if (isset($time_zone_type) && |
| 382 | ($time_zone_type == 1 || $time_zone_type == 3)) { |
| 383 | /* load time zone functions */ |
| 384 | require(SM_PATH . 'include/timezones.php'); |
| 385 | $realTimeZone = sq_get_tz_key($timeZone); |
| 386 | } else { |
| 387 | $realTimeZone = $timeZone; |
| 388 | } |
| 389 | |
| 390 | // set time zone |
| 391 | if ($realTimeZone) { |
| 392 | putenv("TZ=".$realTimeZone); |
| 393 | } |
| 394 | } |
| 395 | break; |
| 396 | } |
| 397 | |
| 398 | /** |
| 399 | * Initialize the template object |
| 400 | */ |
| 401 | require(SM_PATH . 'class/template/template.class.php'); |
| 402 | /* |
| 403 | * $sTplDir is not initialized when a user is not logged in, so we will use |
| 404 | * the config file defaults here. If the neccesary variables are net set, |
| 405 | * force a default value. |
| 406 | */ |
| 407 | $aTemplateSet = ( !isset($aTemplateSet) ? array() : $aTemplateSet ); |
| 408 | $templateset_default = ( !isset($templateset_default) ? 0 : $templateset_default ); |
| 409 | |
| 410 | $sTplDir = ( !isset($aTemplateSet[$templateset_default]['PATH']) ? |
| 411 | SM_PATH . 'templates/default/' : |
| 412 | $aTemplateSet[$templateset_default]['PATH'] ); |
| 413 | $oTemplate = new Template($sTplDir); |
| 414 | |
| 415 | /** |
| 416 | * Initialize our custom error handler object |
| 417 | */ |
| 418 | require(SM_PATH . 'class/error.class.php'); |
| 419 | $oErrorHandler = new ErrorHandler($oTemplate,'error_message.tpl'); |
| 420 | |
| 421 | /** |
| 422 | * Activate custom error handling |
| 423 | */ |
| 424 | if (version_compare(PHP_VERSION, "4.3.0", ">=")) { |
| 425 | $oldErrorHandler = set_error_handler(array($oErrorHandler, 'SquirrelMailErrorhandler')); |
| 426 | } else { |
| 427 | $oldErrorHandler = set_error_handler('SquirrelMailErrorhandler'); |
| 428 | } |
| 429 | |
| 430 | /** |
| 431 | * Javascript support detection function |
| 432 | * @param boolean $reset recheck javascript support if set to true. |
| 433 | * @return integer SMPREF_JS_ON or SMPREF_JS_OFF ({@see functions/constants.php}) |
| 434 | * @since 1.5.1 |
| 435 | */ |
| 436 | function checkForJavascript($reset = FALSE) { |
| 437 | global $data_dir, $username, $javascript_on, $javascript_setting; |
| 438 | |
| 439 | if ( !$reset && sqGetGlobalVar('javascript_on', $javascript_on, SQ_SESSION) ) |
| 440 | return $javascript_on; |
| 441 | |
| 442 | if ( $reset || !isset($javascript_setting) ) |
| 443 | $javascript_setting = getPref($data_dir, $username, 'javascript_setting', SMPREF_JS_AUTODETECT); |
| 444 | |
| 445 | if ( !sqGetGlobalVar('new_js_autodetect_results', $js_autodetect_results) && |
| 446 | !sqGetGlobalVar('js_autodetect_results', $js_autodetect_results) ) |
| 447 | $js_autodetect_results = SMPREF_JS_OFF; |
| 448 | |
| 449 | if ( $javascript_setting == SMPREF_JS_AUTODETECT ) |
| 450 | $javascript_on = $js_autodetect_results; |
| 451 | else |
| 452 | $javascript_on = $javascript_setting; |
| 453 | |
| 454 | sqsession_register($javascript_on, 'javascript_on'); |
| 455 | return $javascript_on; |
| 456 | } |
| 457 | |
| 458 | function sqm_baseuri() { |
| 459 | global $base_uri; |
| 460 | return $base_uri; |
| 461 | } |