Fix XSS problem with unsanitized style tags in messages [CVE-2011-2023]
[squirrelmail.git] / include / init.php
CommitLineData
202bcbcc 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 *
ae5dddc0 8 * @copyright 2006-2011 The SquirrelMail Project Team
202bcbcc 9 * @license http://opensource.org/licenses/gpl-license.php GNU Public License
10 * @version $Id$
11 * @package squirrelmail
12 */
13
202bcbcc 14/**
15 * This is a development version so in order to track programmer mistakes we
16 * set the error reporting to E_ALL
1888b1bf 17FIXME: disabling this for now, because we now have $sm_debug_mode, but the problem with that is that we don't know what it will be until we have loaded the config file, a good 175 lines below after several important files have been included, etc. For now, we'll trust that developers have turned on E_ALL in php.ini anyway, but this can be uncommented if not.
202bcbcc 18 */
1888b1bf 19//error_reporting(E_ALL);
20
202bcbcc 21
202bcbcc 22/**
c7ebdfcf 23 * Make sure we have a page name
24 *
25 */
26if ( !defined('PAGE_NAME') ) define('PAGE_NAME', NULL);
27
28
29/**
6a2a6e44 30 * If register_globals are on, unregister globals.
a3b99374 31 * Second test covers boolean set as string (php_value register_globals off).
6a2a6e44 32 */
55dd9abf 33if ((bool) ini_get('register_globals') &&
a3b99374 34 strtolower(ini_get('register_globals'))!='off') {
6a2a6e44 35 /**
55dd9abf 36 * Remove all globals that are not reserved by PHP
37 * 'value' and 'key' are used by foreach. Don't unset them inside foreach.
6a2a6e44 38 */
55dd9abf 39 foreach ($GLOBALS as $key => $value) {
40 switch($key) {
41 case 'HTTP_POST_VARS':
42 case '_POST':
43 case 'HTTP_GET_VARS':
44 case '_GET':
45 case 'HTTP_COOKIE_VARS':
46 case '_COOKIE':
47 case 'HTTP_SERVER_VARS':
48 case '_SERVER':
49 case 'HTTP_ENV_VARS':
50 case '_ENV':
51 case 'HTTP_POST_FILES':
52 case '_FILES':
53 case '_REQUEST':
54 case 'HTTP_SESSION_VARS':
55 case '_SESSION':
56 case 'GLOBALS':
57 case 'key':
58 case 'value':
59 break;
55dd9abf 60 default:
61 unset($GLOBALS[$key]);
62 }
6a2a6e44 63 }
55dd9abf 64 // Unset variables used in foreach
65 unset($GLOBALS['key']);
66 unset($GLOBALS['value']);
6a2a6e44 67}
68
71efd1ed 69/**
d849b570 70 * Used as a dummy value, e.g., for passing as an empty
e39d00e9 71 * hook argument (where the value is passed by reference,
72 * and therefore NULL itself is not acceptable).
d849b570 73 */
086ad092 74global $null;
d849b570 75$null = NULL;
76
77/**
dbbd586e 78 * The global $server_os variable will be "windows" if
79 * we are working in a Windows environment or "*nix"
80 * otherwise.
81 */
82global $server_os;
83if (DIRECTORY_SEPARATOR == '\\') $server_os = 'windows'; else $server_os = '*nix';
84
85/**
71efd1ed 86 * [#1518885] session.use_cookies = off breaks SquirrelMail
87 *
086ad092 88 * When session cookies are not used, all http redirects, meta refreshes,
89 * src/download.php and javascript URLs are broken. Setting must be set
71efd1ed 90 * before session is started.
91 */
92if (!(bool)ini_get('session.use_cookies') ||
93 ini_get('session.use_cookies') == 'off') {
94 ini_set('session.use_cookies','1');
95}
6a2a6e44 96
79dd8c72 97/**
98 * Initialize seed of random number generator.
99 * We use a number of things to randomize input: current time in ms,
100 * info about the remote client, info about the current process, the
101 * randomness of uniqid and stat of the current file.
102 *
103 * We seed this here only once per init, not only to save cycles
104 * but also to make the result of mt_rand more random (it now also
105 * depends on the number of times mt_rand was called before in this
106 * execution.
107 */
108$seed = microtime() . $_SERVER['REMOTE_PORT'] . $_SERVER['REMOTE_ADDR'] . getmypid();
109
110if (function_exists('getrusage')) {
111 /* Avoid warnings with Win32 */
112 $dat = @getrusage();
113 if (isset($dat) && is_array($dat)) { $seed .= implode('', $dat); }
114}
115
116if(!empty($_SERVER['UNIQUE_ID'])) {
117 $seed .= $_SERVER['UNIQUE_ID'];
118}
119
120$seed .= uniqid(mt_rand(),TRUE);
7428254a 121$seed .= implode('', stat( __FILE__));
79dd8c72 122
8313aa5e 123// mt_srand() uses an integer to seed, so we need to distill our
124// very large seed to something useful (without taking a sub-string,
125// the integer conversion of such a large number is always 0 on
126// many systems, but strangely, 9 hex numbers - even if larger
127// than a signed 32 bit integer - seem to be an acceptable "integer"
128// seed (perhaps it is used as unsigned?)...
129// we may want to revisit this and always force it to be less than
130// 2,147,483,647
131//
132$seed = hexdec(substr(md5($seed), 0, 9));
133
134// PHP 4.2 and up don't require seeding, but their used seed algorithm
135// is of questionable quality, so we keep doing it ourselves. */
136mt_srand($seed);
3f081dd0 137
6a2a6e44 138/**
202bcbcc 139 * calculate SM_PATH and calculate the base_uri
140 * assumptions made: init.php is only called from plugins or from the src dir.
141 * files in the plugin directory may not be part of a subdirectory called "src"
142 *
143 */
144if (isset($_SERVER['SCRIPT_NAME'])) {
3f081dd0 145 $a = explode('/', $_SERVER['SCRIPT_NAME']);
202bcbcc 146} elseif (isset($HTTP_SERVER_VARS['SCRIPT_NAME'])) {
3f081dd0 147 $a = explode('/', $HTTP_SERVER_VARS['SCRIPT_NAME']);
b0829edf 148} else {
3f081dd0 149 $error = 'Unable to detect script environment. Please test your PHP '
150 . 'settings and send your PHP core configuration, $_SERVER and '
151 . '$HTTP_SERVER_VARS contents to the SquirrelMail developers.';
b0829edf 152 die($error);
202bcbcc 153}
154$sSM_PATH = '';
3f081dd0 155for($i = count($a) -2; $i > -1; --$i) {
202bcbcc 156 $sSM_PATH .= '../';
157 if ($a[$i] === 'src' || $a[$i] === 'plugins') {
158 break;
159 }
160}
161
3f081dd0 162$base_uri = implode('/', array_slice($a, 0, $i)). '/';
202bcbcc 163
202bcbcc 164define('SM_PATH',$sSM_PATH);
6a2a6e44 165define('SM_BASE_URI', $base_uri);
3f081dd0 166
167
202bcbcc 168/**
169 * global var $bInit is used to check if initialisation took place.
170 * At this moment it's a workarounf for the include of addrbook_search_html
171 * inside compose.php. If we found a better way then remove this. Do only use
172 * this var if you know for sure a page can be called stand alone and be included
173 * in another file.
174 */
175$bInit = true;
176
8e1e2794 177/**
178 * This theme as a failsafe if no themes were found, or if we error
179 * out before anything could be initialised.
180 */
181$color = array();
182$color[0] = '#DCDCDC'; /* light gray TitleBar */
183$color[1] = '#800000'; /* red */
184$color[2] = '#CC0000'; /* light red Warning/Error Messages */
185$color[3] = '#A0B8C8'; /* green-blue Left Bar Background */
186$color[4] = '#FFFFFF'; /* white Normal Background */
187$color[5] = '#FFFFCC'; /* light yellow Table Headers */
188$color[6] = '#000000'; /* black Text on left bar */
189$color[7] = '#0000CC'; /* blue Links */
190$color[8] = '#000000'; /* black Normal text */
191$color[9] = '#ABABAB'; /* mid-gray Darker version of #0 */
192$color[10] = '#666666'; /* dark gray Darker version of #9 */
193$color[11] = '#770000'; /* dark red Special Folders color */
194$color[12] = '#EDEDED';
195$color[13] = '#800000'; /* (dark red) Color for quoted text -- > 1 quote */
196$color[14] = '#ff0000'; /* (red) Color for quoted text -- >> 2 or more */
197$color[15] = '#002266'; /* (dark blue) Unselectable folders */
198$color[16] = '#ff9933'; /* (orange) Highlight color */
199
1888b1bf 200require(SM_PATH . 'include/constants.php');
202bcbcc 201require(SM_PATH . 'functions/global.php');
4ffcf13a 202require(SM_PATH . 'functions/strings.php');
918fcc1d 203require(SM_PATH . 'functions/arrays.php');
67c826ce 204require(SM_PATH . 'functions/files.php');
5e68a08e 205
206/* load default configuration */
207require(SM_PATH . 'config/config_default.php');
208/* reset arrays in default configuration */
209$ldap_server = array();
210$plugins = array();
211$fontsets = array();
5e68a08e 212$aTemplateSet = array();
28294310 213$aTemplateSet[0]['ID'] = 'default';
214$aTemplateSet[0]['NAME'] = 'Default';
01fd1d1a 215
5e68a08e 216/* load site configuration */
202bcbcc 217require(SM_PATH . 'config/config.php');
5e68a08e 218/* load local configuration overrides */
219if (file_exists(SM_PATH . 'config/config_local.php')) {
220 require(SM_PATH . 'config/config_local.php');
221}
222
1888b1bf 223
224/**
225 * Set PHP error reporting level based on the SquirrelMail debug mode
226 */
227$error_level = 0;
228if ($sm_debug_mode & SM_DEBUG_MODE_SIMPLE)
229 $error_level |= E_ERROR;
230if ($sm_debug_mode & SM_DEBUG_MODE_MODERATE
231 || $sm_debug_mode & SM_DEBUG_MODE_ADVANCED)
232 $error_level |= E_ALL;
233if ($sm_debug_mode & SM_DEBUG_MODE_STRICT)
234 $error_level |= E_STRICT;
235error_reporting($error_level);
236
237
8f557b94 238/**
239 * Detect SSL connections
240 */
241$is_secure_connection = is_ssl_secured_connection();
242
243
202bcbcc 244require(SM_PATH . 'functions/plugin.php');
202bcbcc 245require(SM_PATH . 'include/languages.php');
42b5e8aa 246require(SM_PATH . 'class/template/Template.class.php');
5ab684a5 247require(SM_PATH . 'class/error.class.php');
202bcbcc 248
249/**
250 * If magic_quotes_runtime is on, SquirrelMail breaks in new and creative ways.
251 * Force magic_quotes_runtime off.
252 * tassium@squirrelmail.org - I put it here in the hopes that all SM code includes this.
253 * If there's a better place, please let me know.
254 */
255ini_set('magic_quotes_runtime','0');
256
257
258/* if running with magic_quotes_gpc then strip the slashes
259 from POST and GET global arrays */
430a19f3 260if (function_exists('get_magic_quotes_gpc') && @get_magic_quotes_gpc()) {
202bcbcc 261 sqstripslashes($_GET);
262 sqstripslashes($_POST);
263}
264
202bcbcc 265
960b7ec2 266/**
267 * Strip any tags added to the url from PHP_SELF.
268 * This fixes hand crafted url XXS expoits for any
269 * page that uses PHP_SELF as the FORM action
270 * Update: strip_tags() won't catch something like
271 * src/right_main.php?sort=0&startMessage=1&mailbox=INBOX&xxx="><script>window.open("http://example.com")</script>
272 * or
273 * contrib/decrypt_headers.php/%22%20onmouseover=%22alert(%27hello%20world%27)%22%3E
274 * because it doesn't bother with broken tags.
275 * htmlspecialchars() is the preferred method.
276 * QUERY_STRING also needs the same treatment since it is
277 * used in php_self().
b837b30f 278 * Update again: the encoding of ampersands that occurs
279 * using htmlspecialchars() corrupts the query strings
280 * in normal URIs, so we have to let those through.
281FIXME: will the de-sanitizing of ampersands create any security/XSS problems?
960b7ec2 282 */
49ec41bc 283if (isset($_SERVER['REQUEST_URI']))
b837b30f 284 $_SERVER['REQUEST_URI'] = str_replace('&amp;', '&', htmlspecialchars($_SERVER['REQUEST_URI']));
49ec41bc 285if (isset($_SERVER['PHP_SELF']))
b837b30f 286 $_SERVER['PHP_SELF'] = str_replace('&amp;', '&', htmlspecialchars($_SERVER['PHP_SELF']));
49ec41bc 287if (isset($_SERVER['QUERY_STRING']))
b837b30f 288 $_SERVER['QUERY_STRING'] = str_replace('&amp;', '&', htmlspecialchars($_SERVER['QUERY_STRING']));
202bcbcc 289
290$PHP_SELF = php_self();
291
292/**
293 * Initialize the session
294 */
295
e8c4e350 296/** set the name of the session cookie */
297if (!isset($session_name) || !$session_name) {
298 $session_name = 'SQMSESSID';
299}
300
301/**
319ad3c0 302 * When session.auto_start is On we want to destroy/close the session
1d537493 303 */
304$sSessionAutostartName = session_name();
ccb5faf0 305$sSessionAutostartID = session_id();
306if (!empty($sSessionAutostartID) && $sSessionAutostartName !== $session_name) {
1d537493 307 $sCookiePath = ini_get('session.cookie_path');
308 $sCookieDomain = ini_get('session.cookie_domain');
e8c4e350 309 // reset the cookie
ccb5faf0 310 sqsetcookie($sSessionAutostartName,'',1,$sCookiePath,$sCookieDomain);
e8c4e350 311 @session_destroy();
312 session_write_close();
1d537493 313}
e8c4e350 314
202bcbcc 315/**
316 * includes from classes stored in the session
317 */
318require(SM_PATH . 'class/mime.class.php');
319
202bcbcc 320ini_set('session.name' , $session_name);
321session_set_cookie_params (0, $base_uri);
322sqsession_is_active();
323
202bcbcc 324/**
319ad3c0 325 * When on login page, have to reset the user session, making
326 * sure to save session restore data first
327 */
328if (PAGE_NAME == 'login') {
329 if (!sqGetGlobalVar('session_expired_post', $sep, SQ_SESSION))
330 $sep = '';
331 if (!sqGetGlobalVar('session_expired_location', $sel, SQ_SESSION))
332 $sel = '';
333 sqsession_destroy();
334 session_write_close();
335
336 /**
337 * in some rare instances, the session seems to stick
338 * around even after destroying it (!!), so if it does,
339 * we'll manually flatten the $_SESSION data
340 */
341 if (!empty($_SESSION))
342 $_SESSION = array();
343
bc3acc5a 344 /**
345 * Allow administrators to define custom session handlers
346 * for SquirrelMail without needing to change anything in
347 * php.ini (application-level).
348 *
349 * In config_local.php, admin needs to put:
350 *
351 * $custom_session_handlers = array(
352 * 'my_open_handler',
353 * 'my_close_handler',
354 * 'my_read_handler',
355 * 'my_write_handler',
356 * 'my_destroy_handler',
357 * 'my_gc_handler',
358 * );
359 * session_module_name('user');
360 * session_set_save_handler(
361 * $custom_session_handlers[0],
362 * $custom_session_handlers[1],
363 * $custom_session_handlers[2],
364 * $custom_session_handlers[3],
365 * $custom_session_handlers[4],
366 * $custom_session_handlers[5]
367 * );
368 *
369 * We need to replicate that code once here because PHP has
370 * long had a bug that resets the session handler mechanism
371 * when the session data is also destroyed. Because of this
372 * bug, even administrators who define custom session handlers
373 * via a PHP pre-load defined in php.ini (auto_prepend_file)
374 * will still need to define the $custom_session_handlers array
375 * in config_local.php.
376 */
377 global $custom_session_handlers;
378 if (!empty($custom_session_handlers)) {
379 $open = $custom_session_handlers[0];
380 $close = $custom_session_handlers[1];
381 $read = $custom_session_handlers[2];
382 $write = $custom_session_handlers[3];
383 $destroy = $custom_session_handlers[4];
384 $gc = $custom_session_handlers[5];
385 session_module_name('user');
386 session_set_save_handler($open, $close, $read, $write, $destroy, $gc);
387 }
388
319ad3c0 389 sqsession_is_active();
390 session_regenerate_id();
ef33def6 391
392 // put session restore data back into session if necessary
393 if (!empty($sel)) {
394 sqsession_register($sel, 'session_expired_location');
395 if (!empty($sep))
396 sqsession_register($sep, 'session_expired_post');
397 }
319ad3c0 398}
399
400/**
5aed95be 401 * SquirrelMail internal version number -- DO NOT CHANGE
402 * $sm_internal_version = array (release, major, minor)
403 */
a895042a 404$SQM_INTERNAL_VERSION = explode('.', SM_VERSION, 3);
b37e457f 405$SQM_INTERNAL_VERSION[2] = intval($SQM_INTERNAL_VERSION[2]);
5aed95be 406
93d67e0d 407
6d5775db 408/* load prefs system; even when user not logged in, should be OK to do this here */
409require(SM_PATH . 'functions/prefs.php');
410
6d5775db 411
086ad092 412/* if plugins are disabled only for one user and
93d67e0d 413 * the current user is NOT that user, turn them
414 * back on
415 */
0d56053e 416sqgetGlobalVar('username', $username, SQ_SESSION);
93d67e0d 417if ($disable_plugins && !empty($disable_plugins_user)
418 && $username != $disable_plugins_user) {
419 $disable_plugins = false;
420}
421
4a9f6063 422
93d67e0d 423/* remove all plugins if they are disabled */
424if ($disable_plugins) {
425 $plugins = array();
426}
427
428
5aed95be 429/**
430 * Include Compatibility plugin if available.
431 */
93d67e0d 432if (!$disable_plugins && file_exists(SM_PATH . 'plugins/compatibility/functions.php'))
5aed95be 433 include_once(SM_PATH . 'plugins/compatibility/functions.php');
434
4a9f6063 435
5aed95be 436/**
437 * MAIN PLUGIN LOADING CODE HERE
086ad092 438 * On init, we no longer need to load all plugin setup files.
5aed95be 439 * Now, we load the statically generated hook registrations here
440 * and let the hook calls include only the plugins needed.
441 */
442$squirrelmail_plugin_hooks = array();
93d67e0d 443if (!$disable_plugins && file_exists(SM_PATH . 'config/plugin_hooks.php')) {
4a9f6063 444//FIXME: if we keep the plugin hooks array static like this, it seems like we should also keep the template files list in a static file too (when a new user session is started or the template set is changed, the code will dynamically iterate through the directory heirarchy of the template directory and catalog all the template files therein (and store the "catalog" in PHP session) -- instead, we could do that once at config-time and keep that static so SM can just include the file just like the line below)
5aed95be 445 require(SM_PATH . 'config/plugin_hooks.php');
446}
447
4a9f6063 448
5aed95be 449/**
4a9f6063 450 * Plugin authors note that the "config_override" hook used to be
451 * executed here, but please adapt your plugin to use this "prefs_backend"
452 * hook instead, making sure that it does NOT return anything, since
453 * doing so will interfere with proper prefs system functionality.
454 * Of course, otherwise, this hook may be used to do any configuration
455 * overrides as needed, as well as set up a custom preferences backend.
5aed95be 456 */
4a9f6063 457$prefs_backend = do_hook('prefs_backend', $null);
458if (isset($prefs_backend) && !empty($prefs_backend) && file_exists(SM_PATH . $prefs_backend)) {
459 require(SM_PATH . $prefs_backend);
460} elseif (isset($prefs_dsn) && !empty($prefs_dsn)) {
461 require(SM_PATH . 'functions/db_prefs.php');
462} else {
463 require(SM_PATH . 'functions/file_prefs.php');
464}
465
466
5aed95be 467
468/**
3464e1f4 469 * DISABLED.
202bcbcc 470 * Remove globalized session data in rg=on setups
086ad092 471 *
3464e1f4 472 * Code can be utilized when session is started, but data is not loaded.
086ad092 473 * We have already loaded configuration and other important vars. Can't
aae60854 474 * clean session globals here, beside, the cleanout of globals at the
475 * top of this file will have removed anything this code would find anyway.
3464e1f4 476if ((bool) @ini_get('register_globals') &&
477 strtolower(ini_get('register_globals'))!='off') {
202bcbcc 478 foreach ($_SESSION as $key => $value) {
479 unset($GLOBALS[$key]);
480 }
481}
3464e1f4 482*/
6a2a6e44 483
826ddd72 484sqsession_register(SM_BASE_URI,'base_uri');
6a2a6e44 485
202bcbcc 486/**
487 * Retrieve the language cookie
488 */
489if (! sqgetGlobalVar('squirrelmail_language',$squirrelmail_language,SQ_COOKIE)) {
490 $squirrelmail_language = '';
491}
492
bf3abdc3 493
202bcbcc 494/**
775a1f52 495 * In some cases, buffering all output allows more complex functionality,
496 * especially for plugins that want to add headers on hooks that are beyond
497 * the point of output having been sent to the browser otherwise.
498 *
499 * Note that we don't turn this on any earlier since we want to allow plugins
500 * to turn it on themselves via a configuration override on the prefs_backend
501 * hook.
502 *
503 */
504if ($buffer_output) ob_start(!empty($buffered_output_handler) ? $buffered_output_handler : NULL);
505
506
507/**
f0d28f44 508 * Do something special for some pages. This is based on the PAGE_NAME constant
9e06a3ea 509 * set at the top of every page.
202bcbcc 510 */
0d56053e 511$set_up_langage_after_template_setup = FALSE;
9e06a3ea 512switch (PAGE_NAME) {
086ad092 513 case 'style':
c4e5f61f 514
2b26084f 515 // need to get the right template set up
28294310 516 //
517 sqGetGlobalVar('templateid', $templateid, SQ_GET);
c4e5f61f 518
2b26084f 519 // sanitize just in case...
28294310 520 //
521 $templateid = preg_replace('/(\.\.\/){1,}/', '', $templateid);
522
523 // make sure given template actually is available
524 //
28294310 525 $found_templateset = false;
526 for ($i = 0; $i < count($aTemplateSet); ++$i) {
527 if ($aTemplateSet[$i]['ID'] == $templateid) {
528 $found_templateset = true;
529 break;
530 }
531 }
c4e5f61f 532
be155e14 533// FIXME: do we need/want to check here for actual (physical) presence of template sets?
28294310 534 // selected template not available, fall back to default template
535 //
536 if (!$found_templateset) {
42b5e8aa 537 $sTemplateID = Template::get_default_template_set();
28294310 538 } else {
539 $sTemplateID = $templateid;
c4e5f61f 540 }
541
2b26084f 542 session_write_close();
c4e5f61f 543 break;
544
f0d28f44 545 case 'mailto':
546 // nothing to do
547 break;
548
202bcbcc 549 case 'redirect':
2e616fa4 550 require(SM_PATH . 'functions/auth.php');
202bcbcc 551 //nobreak;
bf3abdc3 552
202bcbcc 553 case 'login':
554 require(SM_PATH . 'functions/display_messages.php' );
555 require(SM_PATH . 'functions/page_header.php');
556 require(SM_PATH . 'functions/html.php');
42b5e8aa 557
558 // reset template file cache
559 //
560 $sTemplateID = Template::get_default_template_set();
d81572f7 561 Template::cache_template_file_hierarchy($sTemplateID, TRUE);
42b5e8aa 562
1d537493 563 /**
01fd1d1a 564 * Make sure icon variables are setup for the login page.
565 */
566 $icon_theme = $icon_themes[$icon_theme_def]['PATH'];
567 /*
568 * NOTE: The $icon_theme_path var should contain the path to the icon
569 * theme to use. If the admin has disabled icons, or the user has
570 * set the icon theme to "None," no icons will be used.
571 */
572 $icon_theme_path = (!$use_icons || $icon_theme=='none') ? NULL : ($icon_theme == 'template' ? SM_PATH . Template::calculate_template_images_directory($sTemplateID) : $icon_theme);
573
202bcbcc 574 break;
575 default:
576 require(SM_PATH . 'functions/display_messages.php' );
577 require(SM_PATH . 'functions/page_header.php');
578 require(SM_PATH . 'functions/html.php');
202bcbcc 579
580
581 /**
7428254a 582 * Check if we are logged in and does optional referrer check
202bcbcc 583 */
584 require(SM_PATH . 'functions/auth.php');
585
7428254a 586 global $check_referrer, $domain;
587 if (!sqgetGlobalVar('HTTP_REFERER', $referrer, SQ_SERVER)) $referrer = '';
588 if ($check_referrer == '###DOMAIN###') $check_referrer = $domain;
589 if (!empty($check_referrer)) {
590 $ssl_check_referrer = 'https://' . $check_referrer;
591 $check_referrer = 'http://' . $check_referrer;
592 }
593 if (!sqsession_is_registered('user_is_logged_in')
594 || ($check_referrer && !empty($referrer)
595 && strpos(strtolower($referrer), strtolower($check_referrer)) !== 0
596 && strpos(strtolower($referrer), strtolower($ssl_check_referrer)) !== 0)) {
f8eb968d 597
598 // use $message to indicate what logout text the user
599 // will see... if 0, typical "You must be logged in"
600 // if 1, information that the user session was saved
7428254a 601 // and will be resumed after (re)login, if 2, there
602 // seems to have been a XSS or phishing attack (bad
603 // referrer)
f8eb968d 604 //
605 $message = 0;
606
202bcbcc 607 // First we store some information in the new session to prevent
608 // information-loss.
609 //
610 $session_expired_post = $_POST;
f8e68605 611 $session_expired_location = PAGE_NAME;
202bcbcc 612 if (!sqsession_is_registered('session_expired_post')) {
613 sqsession_register($session_expired_post,'session_expired_post');
614 }
615 if (!sqsession_is_registered('session_expired_location')) {
616 sqsession_register($session_expired_location,'session_expired_location');
f8e68605 617 if ($session_expired_location == 'compose')
f8eb968d 618 $message = 1;
202bcbcc 619 }
7428254a 620
621 // was bad referrer the reason we were rejected?
622 //
623 if (sqsession_is_registered('user_is_logged_in')
624 && $check_referrer && !empty($referrer))
625 $message = 2;
626
202bcbcc 627 // signout page will deal with users who aren't logged
628 // in on its own; don't show error here
629 //
9e06a3ea 630 if ( PAGE_NAME == 'signout' ) {
a140422a 631 return;
202bcbcc 632 }
633
8efadc6b 634 /**
635 * Initialize the template object (logout_error uses it)
636 */
8efadc6b 637 /*
086ad092 638 * $sTemplateID is not initialized when a user is not logged in, so we
639 * will use the config file defaults here. If the neccesary variables
d81572f7 640 * are not set, force a default value.
8efadc6b 641 */
d81572f7 642 if (PAGE_NAME == 'squirrelmail_rpc') {
643 $sTemplateID = Template::get_rpc_template_set();
644 } else {
645 $sTemplateID = Template::get_default_template_set();
646 }
28294310 647 $oTemplate = Template::construct_template($sTemplateID);
8efadc6b 648
202bcbcc 649 set_up_language($squirrelmail_language, true);
f8eb968d 650 if (!$message)
651 logout_error( _("You must be logged in to access this page.") );
7428254a 652 else if ($message == 1)
f8eb968d 653 logout_error( _("Your session has expired, but will be resumed after logging in again.") );
7428254a 654 else if ($message == 2)
655 logout_error( _("The current page request appears to have originated from an unrecognized source.") );
202bcbcc 656 exit;
657 }
658
79524620 659 sqgetGlobalVar('authz',$authz,SQ_SESSION);
202bcbcc 660
661 /**
662 * Setting the prefs backend
663 */
664 sqgetGlobalVar('prefs_cache', $prefs_cache, SQ_SESSION );
665 sqgetGlobalVar('prefs_are_cached', $prefs_are_cached, SQ_SESSION );
666
667 if ( !sqsession_is_registered('prefs_are_cached') ||
668 !isset( $prefs_cache) ||
669 !is_array( $prefs_cache)) {
670 $prefs_are_cached = false;
671 $prefs_cache = false; //array();
672 }
673
202bcbcc 674 /**
675 * initializing user settings
676 */
677 require(SM_PATH . 'include/load_prefs.php');
678
202bcbcc 679 /**
680 * We'll need this to later have a noframes version
681 *
682 * Check if the user has a language preference, but no cookie.
683 * Send him a cookie with his language preference, if there is
684 * such discrepancy.
685 */
686 $my_language = getPref($data_dir, $username, 'language');
687 if ($my_language != $squirrelmail_language) {
688 sqsetcookie('squirrelmail_language', $my_language, time()+2592000, $base_uri);
689 }
202bcbcc 690
0d56053e 691 $set_up_langage_after_template_setup = TRUE;
202bcbcc 692
693 $timeZone = getPref($data_dir, $username, 'timezone');
694
695 /* Check to see if we are allowed to set the TZ environment variable.
696 * We are able to do this if ...
697 * safe_mode is disabled OR
698 * safe_mode_allowed_env_vars is empty (you are allowed to set any) OR
699 * safe_mode_allowed_env_vars contains TZ
700 */
701 $tzChangeAllowed = (!ini_get('safe_mode')) ||
702 !strcmp(ini_get('safe_mode_allowed_env_vars'),'') ||
703 preg_match('/^([\w_]+,)*TZ/', ini_get('safe_mode_allowed_env_vars'));
704
705 if ( $timeZone != SMPREF_NONE && ($timeZone != "")
706 && $tzChangeAllowed ) {
707
708 // get time zone key, if strict or custom strict timezones are used
709 if (isset($time_zone_type) &&
710 ($time_zone_type == 1 || $time_zone_type == 3)) {
711 /* load time zone functions */
712 require(SM_PATH . 'include/timezones.php');
713 $realTimeZone = sq_get_tz_key($timeZone);
714 } else {
715 $realTimeZone = $timeZone;
716 }
717
718 // set time zone
719 if ($realTimeZone) {
720 putenv("TZ=".$realTimeZone);
721 }
722 }
867fed37 723
724 /**
725 * php 5.1.0 added time zone functions. Set time zone with them in order
726 * to prevent E_STRICT notices and allow time zone modifications in safe_mode.
727 */
728 if (function_exists('date_default_timezone_set')) {
729 if ($timeZone != SMPREF_NONE && $timeZone != "") {
730 date_default_timezone_set($timeZone);
731 } else {
732 // interface runs on server's time zone. Remove php E_STRICT complains
733 $default_timezone = @date_default_timezone_get();
086ad092 734 date_default_timezone_set($default_timezone);
867fed37 735 }
736 }
202bcbcc 737 break;
738}
739
202bcbcc 740/*
086ad092 741 * $sTemplateID is not initialized when a user is not logged in, so we
742 * will use the config file defaults here. If the neccesary variables
28294310 743 * are not set, force a default value.
086ad092 744 *
745 * If the user is logged in, $sTemplateID will be set in load_prefs.php,
28294310 746 * so we shouldn't change it here.
202bcbcc 747 */
28294310 748if (!isset($sTemplateID)) {
d81572f7 749 if (PAGE_NAME == 'squirrelmail_rpc') {
750 $sTemplateID = Template::get_rpc_template_set();
751 } else {
752 $sTemplateID = Template::get_default_template_set();
753 }
28294310 754 $icon_theme_path = !$use_icons ? NULL : Template::calculate_template_images_directory($sTemplateID);
3aa46abc 755}
be155e14 756
757// template object may have already been constructed in load_prefs.php
758//
759if (empty($oTemplate)) {
760 $oTemplate = Template::construct_template($sTemplateID);
761}
202bcbcc 762
7aae649d 763// We want some variables to always be available to the template
551c7b53 764//
e39d00e9 765$oTemplate->assign('javascript_on',
766 (sqGetGlobalVar('user_is_logged_in', $user_is_logged_in, SQ_SESSION)
767 ? checkForJavascript() : 0));
fe8103c2 768$oTemplate->assign('base_uri', sqm_baseuri());
457e8593 769$always_include = array('sTemplateID', 'icon_theme_path');
7aae649d 770foreach ($always_include as $var) {
771 $oTemplate->assign($var, (isset($$var) ? $$var : NULL));
772}
773
551c7b53 774// A few output elements are used often, so just get them once here
775//
776$nbsp = $oTemplate->fetch('non_breaking_space.tpl');
777$br = $oTemplate->fetch('line_break.tpl');
778
0d56053e 779
780/**
781 * Set up the language.
782 *
783 * This code block corresponds to the *default* block of the switch
784 * statement above, but the language cannot be set up until after the
785 * template is instantiated, so we set $set_up_langage_after_template_setup
786 * above and do the linguistic stuff now.
787 */
788if ($set_up_langage_after_template_setup) {
789 $err=set_up_language(getPref($data_dir, $username, 'language'));
790
791 // Japanese translation used without mbstring support
792 if ($err==2) {
793 $sError = "<p>Your administrator needs to have PHP installed with the multibyte string extension enabled (using configure option --enable-mbstring).</p>\n"
794 . "<p>This system has assumed that you accidently switched to Japanese and has reverted your language preference to English.</p>\n"
795 . "<p>Please refresh this page in order to continue using your webmail.</p>\n";
796 error_box($sError);
797 }
798}
799
800
202bcbcc 801/**
802 * Initialize our custom error handler object
803 */
202bcbcc 804$oErrorHandler = new ErrorHandler($oTemplate,'error_message.tpl');
805
0d56053e 806
202bcbcc 807/**
808 * Activate custom error handling
809 */
810if (version_compare(PHP_VERSION, "4.3.0", ">=")) {
811 $oldErrorHandler = set_error_handler(array($oErrorHandler, 'SquirrelMailErrorhandler'));
812} else {
813 $oldErrorHandler = set_error_handler('SquirrelMailErrorhandler');
814}
815
f0d28f44 816
817// ============================================================================
818// ================= End of Live Code, Beginning of Functions =================
819// ============================================================================
820
821
202bcbcc 822/**
823 * Javascript support detection function
824 * @param boolean $reset recheck javascript support if set to true.
867fed37 825 * @return integer SMPREF_JS_ON or SMPREF_JS_OFF ({@see include/constants.php})
202bcbcc 826 * @since 1.5.1
827 */
202bcbcc 828function checkForJavascript($reset = FALSE) {
829 global $data_dir, $username, $javascript_on, $javascript_setting;
830
831 if ( !$reset && sqGetGlobalVar('javascript_on', $javascript_on, SQ_SESSION) )
832 return $javascript_on;
833
960b7ec2 834 //FIXME: this isn't used anywhere else in this function; can we remove it? why is it here?
e39d00e9 835 $user_is_logged_in = FALSE;
bf3abdc3 836 if ( $reset || !isset($javascript_setting) )
202bcbcc 837 $javascript_setting = getPref($data_dir, $username, 'javascript_setting', SMPREF_JS_AUTODETECT);
838
839 if ( !sqGetGlobalVar('new_js_autodetect_results', $js_autodetect_results) &&
840 !sqGetGlobalVar('js_autodetect_results', $js_autodetect_results) )
841 $js_autodetect_results = SMPREF_JS_OFF;
842
843 if ( $javascript_setting == SMPREF_JS_AUTODETECT )
844 $javascript_on = $js_autodetect_results;
845 else
846 $javascript_on = $javascript_setting;
847
848 sqsession_register($javascript_on, 'javascript_on');
849 return $javascript_on;
850}
851
852function sqm_baseuri() {
853 global $base_uri;
854 return $base_uri;
8e1e2794 855}