/
rcube.php
1808 lines (1540 loc) · 54.9 KB
/
rcube.php
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
<?php
/**
+-----------------------------------------------------------------------+
| This file is part of the Roundcube Webmail client |
| |
| Copyright (C) The Roundcube Dev Team |
| Copyright (C) Kolab Systems AG |
| |
| Licensed under the GNU General Public License version 3 or |
| any later version with exceptions for skins & plugins. |
| See the README file for a full license statement. |
| |
| PURPOSE: |
| Framework base class providing core functions and holding |
| instances of all 'global' objects like db- and storage-connections |
+-----------------------------------------------------------------------+
| Author: Thomas Bruederli <roundcube@gmail.com> |
+-----------------------------------------------------------------------+
*/
/**
* Base class of the Roundcube Framework
* implemented as singleton
*
* @package Framework
* @subpackage Core
*/
class rcube
{
// Init options
const INIT_WITH_DB = 1;
const INIT_WITH_PLUGINS = 2;
// Request status
const REQUEST_VALID = 0;
const REQUEST_ERROR_URL = 1;
const REQUEST_ERROR_TOKEN = 2;
const DEBUG_LINE_LENGTH = 4096;
/** @var rcube_config Stores instance of rcube_config */
public $config;
/** @var rcube_db Instance of database class */
public $db;
/** @var Memcache Instance of Memcache class */
public $memcache;
/** @var Memcached Instance of Memcached class */
public $memcached;
/** @var Redis Instance of Redis class */
public $redis;
/** @var rcube_session Instance of rcube_session class */
public $session;
/** @var rcube_smtp Instance of rcube_smtp class */
public $smtp;
/** @var rcube_storage Instance of rcube_storage class */
public $storage;
/** @var rcube_output Instance of rcube_output class */
public $output;
/** @var rcube_plugin_api Instance of rcube_plugin_api */
public $plugins;
/** @var rcube_user Instance of rcube_user class */
public $user;
/** @var int Request status */
public $request_status = 0;
/** @var array Localization */
protected $texts;
/** @var rcube_cache[] Initialized cache objects */
protected $caches = array();
/** @var array Registered shutdown functions */
protected $shutdown_functions = array();
/** @var rcube Singleton instance of rcube */
static protected $instance;
/**
* This implements the 'singleton' design pattern
*
* @param int $mode Options to initialize with this instance. See rcube::INIT_WITH_* constants
* @param string $env Environment name to run (e.g. live, dev, test)
*
* @return rcube The one and only instance
*/
static function get_instance($mode = 0, $env = '')
{
if (!self::$instance) {
self::$instance = new rcube($env);
self::$instance->init($mode);
}
return self::$instance;
}
/**
* Private constructor
*
* @param string $env Environment name to run (e.g. live, dev, test)
*/
protected function __construct($env = '')
{
// load configuration
$this->config = new rcube_config($env);
$this->plugins = new rcube_dummy_plugin_api;
register_shutdown_function(array($this, 'shutdown'));
}
/**
* Initial startup function
*
* @param int $mode Options to initialize with this instance. See rcube::INIT_WITH_* constants
*/
protected function init($mode = 0)
{
// initialize syslog
if ($this->config->get('log_driver') == 'syslog') {
$syslog_id = $this->config->get('syslog_id', 'roundcube');
$syslog_facility = $this->config->get('syslog_facility', LOG_USER);
openlog($syslog_id, LOG_ODELAY, $syslog_facility);
}
// connect to database
if ($mode & self::INIT_WITH_DB) {
$this->get_dbh();
}
// create plugin API and load plugins
if ($mode & self::INIT_WITH_PLUGINS) {
$this->plugins = rcube_plugin_api::get_instance();
}
}
/**
* Get the current database connection
*
* @return rcube_db Database object
*/
public function get_dbh()
{
if (!$this->db) {
$this->db = rcube_db::factory(
$this->config->get('db_dsnw'),
$this->config->get('db_dsnr'),
$this->config->get('db_persistent')
);
$this->db->set_debug((bool)$this->config->get('sql_debug'));
}
return $this->db;
}
/**
* Get global handle for memcache access
*
* @return object Memcache
*/
public function get_memcache()
{
if (!isset($this->memcache)) {
$this->memcache = rcube_cache_memcache::engine();
}
return $this->memcache;
}
/**
* Get global handle for memcached access
*
* @return object Memcached
*/
public function get_memcached()
{
if (!isset($this->memcached)) {
$this->memcached = rcube_cache_memcached::engine();
}
return $this->memcached;
}
/**
* Get global handle for redis access
*
* @return object Redis
*/
public function get_redis()
{
if (!isset($this->redis)) {
$this->redis = rcube_cache_redis::engine();
}
return $this->redis;
}
/**
* Initialize and get user cache object
*
* @param string $name Cache identifier
* @param string $type Cache type ('db', 'apc', 'memcache', 'redis')
* @param string $ttl Expiration time for cache items
* @param bool $packed Enables/disables data serialization
* @param bool $indexed Use indexed cache
*
* @return rcube_cache User cache object
*/
public function get_cache($name, $type = 'db', $ttl = 0, $packed = true, $indexed = false)
{
if (!isset($this->caches[$name]) && ($userid = $this->get_user_id())) {
$this->caches[$name] = rcube_cache::factory($type, $userid, $name, $ttl, $packed, $indexed);
}
return $this->caches[$name];
}
/**
* Initialize and get shared cache object
*
* @param string $name Cache identifier
* @param bool $packed Enables/disables data serialization
*
* @return rcube_cache Shared cache object
*/
public function get_cache_shared($name, $packed = true)
{
$shared_name = "shared_$name";
if (!array_key_exists($shared_name, $this->caches)) {
$opt = strtolower($name) . '_cache';
$type = $this->config->get($opt);
$ttl = $this->config->get($opt . '_ttl');
if (!$type) {
// cache is disabled
return $this->caches[$shared_name] = null;
}
if ($ttl === null) {
$ttl = $this->config->get('shared_cache_ttl', '10d');
}
$this->caches[$shared_name] = rcube_cache::factory($type, null, $name, $ttl, $packed);
}
return $this->caches[$shared_name];
}
/**
* Create SMTP object and connect to server
*
* @param boolean $connect True if connection should be established
*/
public function smtp_init($connect = false)
{
$this->smtp = new rcube_smtp();
if ($connect) {
$this->smtp->connect();
}
}
/**
* Initialize and get storage object
*
* @return rcube_storage Storage object
*/
public function get_storage()
{
// already initialized
if (!is_object($this->storage)) {
$this->storage_init();
}
return $this->storage;
}
/**
* Initialize storage object
*/
public function storage_init()
{
// already initialized
if (is_object($this->storage)) {
return;
}
$driver = $this->config->get('storage_driver', 'imap');
$driver_class = "rcube_{$driver}";
if (!class_exists($driver_class)) {
self::raise_error(array(
'code' => 700, 'type' => 'php',
'file' => __FILE__, 'line' => __LINE__,
'message' => "Storage driver class ($driver) not found!"),
true, true);
}
// Initialize storage object
$this->storage = new $driver_class;
// for backward compat. (deprecated, will be removed)
$this->imap = $this->storage;
// set class options
$options = array(
'auth_type' => $this->config->get("{$driver}_auth_type", 'check'),
'auth_cid' => $this->config->get("{$driver}_auth_cid"),
'auth_pw' => $this->config->get("{$driver}_auth_pw"),
'debug' => (bool) $this->config->get("{$driver}_debug"),
'force_caps' => (bool) $this->config->get("{$driver}_force_caps"),
'disabled_caps' => $this->config->get("{$driver}_disabled_caps"),
'socket_options' => $this->config->get("{$driver}_conn_options"),
'timeout' => (int) $this->config->get("{$driver}_timeout"),
'skip_deleted' => (bool) $this->config->get('skip_deleted'),
'driver' => $driver,
);
if (!empty($_SESSION['storage_host'])) {
$options['language'] = $_SESSION['language'];
$options['host'] = $_SESSION['storage_host'];
$options['user'] = $_SESSION['username'];
$options['port'] = $_SESSION['storage_port'];
$options['ssl'] = $_SESSION['storage_ssl'];
$options['password'] = $this->decrypt($_SESSION['password']);
$_SESSION[$driver.'_host'] = $_SESSION['storage_host'];
}
$options = $this->plugins->exec_hook("storage_init", $options);
// for backward compat. (deprecated, to be removed)
$options = $this->plugins->exec_hook("imap_init", $options);
$this->storage->set_options($options);
$this->set_storage_prop();
// subscribe to 'storage_connected' hook for session logging
if ($this->config->get('imap_log_session', false)) {
$this->plugins->register_hook('storage_connected', array($this, 'storage_log_session'));
}
}
/**
* Set storage parameters.
*/
protected function set_storage_prop()
{
$storage = $this->get_storage();
// set pagesize from config
$pagesize = $this->config->get('mail_pagesize');
if (!$pagesize) {
$pagesize = $this->config->get('pagesize', 50);
}
$storage->set_pagesize($pagesize);
$storage->set_charset($this->config->get('default_charset', RCUBE_CHARSET));
// enable caching of mail data
$driver = $this->config->get('storage_driver', 'imap');
$storage_cache = $this->config->get("{$driver}_cache");
$messages_cache = $this->config->get('messages_cache');
// for backward compatybility
if ($storage_cache === null && $messages_cache === null && $this->config->get('enable_caching')) {
$storage_cache = 'db';
$messages_cache = true;
}
if ($storage_cache) {
$storage->set_caching($storage_cache);
}
if ($messages_cache) {
$storage->set_messages_caching(true);
}
}
/**
* Set special folders type association.
* This must be done AFTER connecting to the server!
*/
protected function set_special_folders()
{
$storage = $this->get_storage();
$folders = $storage->get_special_folders(true);
$prefs = array();
// check SPECIAL-USE flags on IMAP folders
foreach ($folders as $type => $folder) {
$idx = $type . '_mbox';
if ($folder !== $this->config->get($idx)) {
$prefs[$idx] = $folder;
}
}
// Some special folders differ, update user preferences
if (!empty($prefs) && $this->user) {
$this->user->save_prefs($prefs);
}
// create default folders (on login)
if ($this->config->get('create_default_folders')) {
$storage->create_default_folders();
}
}
/**
* Callback for IMAP connection events to log session identifiers
*
* @param array $args Callback arguments
*/
public function storage_log_session($args)
{
if (!empty($args['session']) && session_id()) {
$this->write_log('imap_session', $args['session']);
}
}
/**
* Create session object and start the session.
*/
public function session_init()
{
// Ignore in CLI mode or when session started (Installer?)
if (empty($_SERVER['REMOTE_ADDR']) || session_id()) {
return;
}
$storage = $this->config->get('session_storage', 'db');
$sess_name = $this->config->get('session_name');
$sess_domain = $this->config->get('session_domain');
$sess_path = $this->config->get('session_path');
$sess_samesite = $this->config->get('session_samesite');
$lifetime = $this->config->get('session_lifetime', 0) * 60;
$is_secure = $this->config->get('use_https') || rcube_utils::https_check();
// set session domain
if ($sess_domain) {
ini_set('session.cookie_domain', $sess_domain);
}
// set session path
if ($sess_path) {
ini_set('session.cookie_path', $sess_path);
}
// set session samesite attribute
// requires PHP >= 7.3.0, see https://wiki.php.net/rfc/same-site-cookie for more info
if (version_compare(PHP_VERSION, '7.3.0', '>=') && $sess_samesite) {
ini_set('session.cookie_samesite', $sess_samesite);
}
// set session garbage collecting time according to session_lifetime
if ($lifetime) {
ini_set('session.gc_maxlifetime', $lifetime * 2);
}
// set session cookie lifetime so it never expires (#5961)
ini_set('session.cookie_lifetime', 0);
ini_set('session.cookie_secure', $is_secure);
ini_set('session.name', $sess_name ?: 'roundcube_sessid');
ini_set('session.use_cookies', 1);
ini_set('session.use_only_cookies', 1);
ini_set('session.cookie_httponly', 1);
// Make sure session garbage collector is enabled when using custom handlers (#6560)
// Note: Use session.gc_divisor to control accuracy
if ($storage != 'php' && !ini_get('session.gc_probability')) {
ini_set('session.gc_probability', 1);
}
// Start the session
$this->session = rcube_session::factory($this->config);
$this->session->register_gc_handler(array($this, 'gc'));
$this->session->start();
}
/**
* Garbage collector - cache/temp cleaner
*/
public function gc()
{
rcube_cache::gc();
$this->get_storage()->cache_gc();
$this->gc_temp();
}
/**
* Garbage collector function for temp files.
* Removes temporary files older than temp_dir_ttl.
*/
public function gc_temp()
{
$tmp = unslashify($this->config->get('temp_dir'));
// expire in 48 hours by default
$temp_dir_ttl = $this->config->get('temp_dir_ttl', '48h');
$temp_dir_ttl = get_offset_sec($temp_dir_ttl);
if ($temp_dir_ttl < 6*3600) {
$temp_dir_ttl = 6*3600; // 6 hours sensible lower bound.
}
$expire = time() - $temp_dir_ttl;
if ($tmp && ($dir = opendir($tmp))) {
while (($fname = readdir($dir)) !== false) {
if (strpos($fname, RCUBE_TEMP_FILE_PREFIX) !== 0) {
continue;
}
if (@filemtime("$tmp/$fname") < $expire) {
@unlink("$tmp/$fname");
}
}
closedir($dir);
}
}
/**
* Runs garbage collector with probability based on
* session settings. This is intended for environments
* without a session.
*/
public function gc_run()
{
$probability = (int) ini_get('session.gc_probability');
$divisor = (int) ini_get('session.gc_divisor');
if ($divisor > 0 && $probability > 0) {
$random = mt_rand(1, $divisor);
if ($random <= $probability) {
$this->gc();
}
}
}
/**
* Get localized text in the desired language
*
* @param mixed $attrib Named parameters array or label name
* @param string $domain Label domain (plugin) name
*
* @return string Localized text
*/
public function gettext($attrib, $domain = null)
{
// load localization files if not done yet
if (empty($this->texts)) {
$this->load_language();
}
// extract attributes
if (is_string($attrib)) {
$attrib = array('name' => $attrib);
}
$name = (string) $attrib['name'];
// attrib contain text values: use them from now
$slang = !empty($_SESSION['language']) ? strtolower($_SESSION['language']) : 'en_us';
if (isset($attrib[$slang])) {
$this->texts[$name] = $attrib[$slang];
}
if ($slang != 'en_us' && isset($attrib['en_us'])) {
$this->texts[$name] = $attrib['en_us'];
}
// check for text with domain
if ($domain && isset($this->texts["$domain.$name"])) {
$text = $this->texts["$domain.$name"];
}
else if (isset($this->texts[$name])) {
$text = $this->texts[$name];
}
// text does not exist
if (!isset($text)) {
return "[$name]";
}
// replace vars in text
if (!empty($attrib['vars']) && is_array($attrib['vars'])) {
foreach ($attrib['vars'] as $var_key => $var_value) {
$text = str_replace($var_key[0] != '$' ? '$'.$var_key : $var_key, $var_value, $text);
}
}
// replace \n with real line break
$text = strtr($text, array('\n' => "\n"));
// case folding
if ((!empty($attrib['uppercase']) && strtolower($attrib['uppercase']) == 'first') || !empty($attrib['ucfirst'])) {
$case_mode = MB_CASE_TITLE;
}
else if (!empty($attrib['uppercase'])) {
$case_mode = MB_CASE_UPPER;
}
else if (!empty($attrib['lowercase'])) {
$case_mode = MB_CASE_LOWER;
}
if (isset($case_mode)) {
$text = mb_convert_case($text, $case_mode);
}
return $text;
}
/**
* Check if the given text label exists
*
* @param string $name Label name
* @param string $domain Label domain (plugin) name or '*' for all domains
* @param string &$ref_domain Sets domain name if label is found
*
* @return boolean True if text exists (either in the current language or in en_US)
*/
public function text_exists($name, $domain = null, &$ref_domain = null)
{
// load localization files if not done yet
if (empty($this->texts)) {
$this->load_language();
}
if (isset($this->texts[$name])) {
$ref_domain = '';
return true;
}
// any of loaded domains (plugins)
if ($domain == '*') {
foreach ($this->plugins->loaded_plugins() as $domain) {
if (isset($this->texts[$domain.'.'.$name])) {
$ref_domain = $domain;
return true;
}
}
}
// specified domain
else if ($domain && isset($this->texts[$domain.'.'.$name])) {
$ref_domain = $domain;
return true;
}
return false;
}
/**
* Load a localization package
*
* @param string $lang Language ID
* @param array $add Additional text labels/messages
* @param array $merge Additional text labels/messages to merge
*/
public function load_language($lang = null, $add = array(), $merge = array())
{
$sess_lang = !empty($_SESSION['language']) ? $_SESSION['language'] : 'en_US';
$lang = $this->language_prop($lang ?: $sess_lang);
// load localized texts
if (empty($this->texts) || $lang != $sess_lang) {
// get english labels (these should be complete)
$files = array(
RCUBE_LOCALIZATION_DIR . 'en_US/labels.inc',
RCUBE_LOCALIZATION_DIR . 'en_US/messages.inc',
);
// include user language files
if ($lang != 'en' && $lang != 'en_US' && is_dir(RCUBE_LOCALIZATION_DIR . $lang)) {
$files[] = RCUBE_LOCALIZATION_DIR . $lang . '/labels.inc';
$files[] = RCUBE_LOCALIZATION_DIR . $lang . '/messages.inc';
}
$this->texts = array();
foreach ($files as $file) {
$this->texts = self::read_localization_file($file, $this->texts);
}
$_SESSION['language'] = $lang;
}
// append additional texts (from plugin)
if (is_array($add) && !empty($add)) {
$this->texts += $add;
}
// merge additional texts (from plugin)
if (is_array($merge) && !empty($merge)) {
$this->texts = array_merge($this->texts, $merge);
}
}
/**
* Read localized texts from an additional location (plugins, skins).
* Then you can use the result as 2nd arg to load_language().
*
* @param string $dir Directory to search in
* @param string|null $lang Language code to read
*
* @return array Localization labels/messages
*/
public function read_localization($dir, $lang = null)
{
if ($lang == null) {
$lang = $_SESSION['language'];
}
$langs = array_unique(array('en_US', $lang));
$locdir = slashify($dir);
$texts = array();
// Language aliases used to find localization in similar lang, see below
$aliases = array(
'de_CH' => 'de_DE',
'es_AR' => 'es_ES',
'fa_AF' => 'fa_IR',
'nl_BE' => 'nl_NL',
'pt_BR' => 'pt_PT',
'zh_CN' => 'zh_TW',
);
foreach ($langs as $lng) {
$fpath = $locdir . $lng . '.inc';
$_texts = self::read_localization_file($fpath);
if (!empty($_texts)) {
$texts = array_merge($texts, $_texts);
}
// Fallback to a localization in similar language (#1488401)
else if ($lng != 'en_US') {
$alias = null;
if (!empty($aliases[$lng])) {
$alias = $aliases[$lng];
}
else if ($key = array_search($lng, $aliases)) {
$alias = $key;
}
if (!empty($alias)) {
$fpath = $locdir . $alias . '.inc';
$texts = self::read_localization_file($fpath, $texts);
}
}
}
return $texts;
}
/**
* Load localization file
*
* @param string $file File location
* @param array $texts Additional texts to merge with
*
* @return array Localization labels/messages
*/
public static function read_localization_file($file, $texts = array())
{
if (is_file($file) && is_readable($file)) {
$labels = [];
$messages = [];
// use buffering to handle empty lines/spaces after closing PHP tag
ob_start();
include $file;
ob_end_clean();
if (!empty($labels)) {
$texts = array_merge($texts, $labels);
}
if (!empty($messages)) {
$texts = array_merge($texts, $messages);
}
}
return $texts;
}
/**
* Check the given string and return a valid language code
*
* @param string $lang Language code
*
* @return string Valid language code
*/
protected function language_prop($lang)
{
static $rcube_languages, $rcube_language_aliases;
// user HTTP_ACCEPT_LANGUAGE if no language is specified
if (empty($lang) || $lang == 'auto') {
$accept_langs = explode(',', $_SERVER['HTTP_ACCEPT_LANGUAGE']);
$lang = $accept_langs[0];
if (preg_match('/^([a-z]+)[_-]([a-z]+)$/i', $lang, $m)) {
$lang = $m[1] . '_' . strtoupper($m[2]);
}
}
if (empty($rcube_languages)) {
@include(RCUBE_LOCALIZATION_DIR . 'index.inc');
}
// check if we have an alias for that language
if (!isset($rcube_languages[$lang]) && isset($rcube_language_aliases[$lang])) {
$lang = $rcube_language_aliases[$lang];
}
// try the first two chars
else if (!isset($rcube_languages[$lang])) {
$short = substr($lang, 0, 2);
// check if we have an alias for the short language code
if (!isset($rcube_languages[$short]) && isset($rcube_language_aliases[$short])) {
$lang = $rcube_language_aliases[$short];
}
// expand 'nn' to 'nn_NN'
else if (!isset($rcube_languages[$short])) {
$lang = $short.'_'.strtoupper($short);
}
}
if (!isset($rcube_languages[$lang]) || !is_dir(RCUBE_LOCALIZATION_DIR . $lang)) {
$lang = 'en_US';
}
return $lang;
}
/**
* Read directory program/localization and return a list of available languages
*
* @return array List of available localizations
*/
public function list_languages()
{
static $sa_languages = array();
if (!count($sa_languages)) {
@include(RCUBE_LOCALIZATION_DIR . 'index.inc');
if ($dh = @opendir(RCUBE_LOCALIZATION_DIR)) {
while (($name = readdir($dh)) !== false) {
if ($name[0] == '.' || !is_dir(RCUBE_LOCALIZATION_DIR . $name)) {
continue;
}
if (isset($rcube_languages[$name])) {
$sa_languages[$name] = $rcube_languages[$name];
}
}
closedir($dh);
}
}
return $sa_languages;
}
/**
* Encrypt a string
*
* @param string $clear Clear text input
* @param string $key Encryption key to retrieve from the configuration, defaults to 'des_key'
* @param bool $base64 Whether or not to base64_encode() the result before returning
*
* @return string Encrypted text
*/
public function encrypt($clear, $key = 'des_key', $base64 = true)
{
if (!is_string($clear) || !strlen($clear)) {
return '';
}
$ckey = $this->config->get_crypto_key($key);
$method = $this->config->get_crypto_method();
$opts = defined('OPENSSL_RAW_DATA') ? OPENSSL_RAW_DATA : true;
$iv = rcube_utils::random_bytes(openssl_cipher_iv_length($method), true);
$cipher = openssl_encrypt($clear, $method, $ckey, $opts, $iv);
if ($cipher === false) {
self::raise_error(array(
'file' => __FILE__,
'line' => __LINE__,
'message' => "Failed to encrypt data with configured cipher method: $method!"
), true, false);
return false;
}
$cipher = $iv . $cipher;
return $base64 ? base64_encode($cipher) : $cipher;
}
/**
* Decrypt a string
*
* @param string $cipher Encrypted text
* @param string $key Encryption key to retrieve from the configuration, defaults to 'des_key'
* @param boo $base64 Whether or not input is base64-encoded
*
* @return string Decrypted text
*/
public function decrypt($cipher, $key = 'des_key', $base64 = true)
{
if (!$cipher) {
return '';
}
$cipher = $base64 ? base64_decode($cipher) : $cipher;
$ckey = $this->config->get_crypto_key($key);
$method = $this->config->get_crypto_method();
$opts = defined('OPENSSL_RAW_DATA') ? OPENSSL_RAW_DATA : true;
$iv_size = openssl_cipher_iv_length($method);
$iv = substr($cipher, 0, $iv_size);
// session corruption? (#1485970)
if (strlen($iv) < $iv_size) {
return '';
}
$cipher = substr($cipher, $iv_size);
$clear = openssl_decrypt($cipher, $method, $ckey, $opts, $iv);
return $clear;
}
/**
* Returns session token for secure URLs
*
* @param bool $generate Generate token if not exists in session yet
*
* @return string|bool Token string, False when disabled
*/
public function get_secure_url_token($generate = false)
{
if ($len = $this->config->get('use_secure_urls')) {
if (empty($_SESSION['secure_token']) && $generate) {
// generate x characters long token
$length = $len > 1 ? $len : 16;
$token = rcube_utils::random_bytes($length);
$plugin = $this->plugins->exec_hook('secure_token',
array('value' => $token, 'length' => $length));
$_SESSION['secure_token'] = $plugin['value'];
}
return $_SESSION['secure_token'];
}
return false;
}
/**
* Generate a unique token to be used in a form request
*
* @return string The request token
*/
public function get_request_token()
{
if (empty($_SESSION['request_token'])) {
$plugin = $this->plugins->exec_hook('request_token', array(
'value' => rcube_utils::random_bytes(32)));
$_SESSION['request_token'] = $plugin['value'];
}
return $_SESSION['request_token'];
}
/**
* Check if the current request contains a valid token.
* Empty requests aren't checked until use_secure_urls is set.
*
* @param int $mode Request method
*
* @return bool True if request token is valid false if not
*/
public function check_request($mode = rcube_utils::INPUT_POST)
{
// check secure token in URL if enabled
if ($token = $this->get_secure_url_token()) {
foreach (explode('/', preg_replace('/[?#&].*$/', '', $_SERVER['REQUEST_URI'])) as $tok) {
if ($tok == $token) {
return true;
}
}