forked from phpbb/phpbb
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathsessions.php
More file actions
584 lines (498 loc) · 18.3 KB
/
Copy pathsessions.php
File metadata and controls
584 lines (498 loc) · 18.3 KB
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
<?php
/***************************************************************************
* sessions.php
* -------------------
* begin : Saturday, Feb 13, 2001
* copyright : (C) 2001 The phpBB Group
* email : support@phpbb.com
*
* $Id$
*
*
***************************************************************************/
/***************************************************************************
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
***************************************************************************/
//
// Adds/updates a new session to the database for the given userid.
// Returns the new session ID on success.
//
function session_begin($user_id, $user_ip, $page_id, $auto_create = 0, $enable_autologin = 0, $admin = 0)
{
global $db, $board_config;
global $HTTP_COOKIE_VARS, $HTTP_GET_VARS, $SID;
$cookiename = $board_config['cookie_name'];
$cookiepath = $board_config['cookie_path'];
$cookiedomain = $board_config['cookie_domain'];
$cookiesecure = $board_config['cookie_secure'];
if ( isset($HTTP_COOKIE_VARS[$cookiename . '_sid']) || isset($HTTP_COOKIE_VARS[$cookiename . '_data']) )
{
$session_id = isset($HTTP_COOKIE_VARS[$cookiename . '_sid']) ? $HTTP_COOKIE_VARS[$cookiename . '_sid'] : '';
$sessiondata = isset($HTTP_COOKIE_VARS[$cookiename . '_data']) ? unserialize(stripslashes($HTTP_COOKIE_VARS[$cookiename . '_data'])) : array();
$sessionmethod = SESSION_METHOD_COOKIE;
}
else
{
$sessiondata = array();
$session_id = ( isset($HTTP_GET_VARS['sid']) ) ? $HTTP_GET_VARS['sid'] : '';
$sessionmethod = SESSION_METHOD_GET;
}
//
if (!preg_match('/^[A-Za-z0-9]*$/', $session_id))
{
$session_id = '';
}
$page_id = (int) $page_id;
$last_visit = 0;
$current_time = time();
//
// Are auto-logins allowed?
// If allow_autologin is not set or is true then they are
// (same behaviour as old 2.0.x session code)
//
if (isset($board_config['allow_autologin']) && !$board_config['allow_autologin'])
{
$enable_autologin = $sessiondata['autologinid'] = false;
}
//
// First off attempt to join with the autologin value if we have one
// If not, just use the user_id value
//
$userdata = array();
if ($user_id != ANONYMOUS)
{
if (isset($sessiondata['autologinid']) && (string) $sessiondata['autologinid'] != '' && $user_id)
{
$sql = 'SELECT u.*
FROM ' . USERS_TABLE . ' u, ' . SESSIONS_KEYS_TABLE . ' k
WHERE u.user_id = ' . (int) $user_id . "
AND u.user_active = 1
AND k.user_id = u.user_id
AND k.key_id = '" . md5($sessiondata['autologinid']) . "'";
if (!($result = $db->sql_query($sql)))
{
message_die(CRITICAL_ERROR, 'Error doing DB query userdata row fetch', '', __LINE__, __FILE__, $sql);
}
$userdata = $db->sql_fetchrow($result);
$db->sql_freeresult($result);
$enable_autologin = $login = 1;
}
else if (!$auto_create)
{
$sessiondata['autologinid'] = '';
$sessiondata['userid'] = $user_id;
$sql = 'SELECT *
FROM ' . USERS_TABLE . '
WHERE user_id = ' . (int) $user_id . '
AND user_active = 1';
if (!($result = $db->sql_query($sql)))
{
message_die(CRITICAL_ERROR, 'Error doing DB query userdata row fetch', '', __LINE__, __FILE__, $sql);
}
$userdata = $db->sql_fetchrow($result);
$db->sql_freeresult($result);
$login = 1;
}
}
//
// At this point either $userdata should be populated or
// one of the below is true
// * Key didn't match one in the DB
// * User does not exist
// * User is inactive
//
if (!sizeof($userdata) || !is_array($userdata) || !$userdata)
{
$sessiondata['autologinid'] = '';
$sessiondata['userid'] = $user_id = ANONYMOUS;
$enable_autologin = $login = 0;
$sql = 'SELECT *
FROM ' . USERS_TABLE . '
WHERE user_id = ' . (int) $user_id;
if (!($result = $db->sql_query($sql)))
{
message_die(CRITICAL_ERROR, 'Error doing DB query userdata row fetch', '', __LINE__, __FILE__, $sql);
}
$userdata = $db->sql_fetchrow($result);
$db->sql_freeresult($result);
}
//
// Initial ban check against user id, IP and email address
//
preg_match('/(..)(..)(..)(..)/', $user_ip, $user_ip_parts);
$sql = "SELECT ban_ip, ban_userid, ban_email
FROM " . BANLIST_TABLE . "
WHERE ban_ip IN ('" . $user_ip_parts[1] . $user_ip_parts[2] . $user_ip_parts[3] . $user_ip_parts[4] . "', '" . $user_ip_parts[1] . $user_ip_parts[2] . $user_ip_parts[3] . "ff', '" . $user_ip_parts[1] . $user_ip_parts[2] . "ffff', '" . $user_ip_parts[1] . "ffffff')
OR ban_userid = $user_id";
if ( $user_id != ANONYMOUS )
{
$sql .= " OR ban_email LIKE '" . str_replace("\'", "''", $userdata['user_email']) . "'
OR ban_email LIKE '" . substr(str_replace("\'", "''", $userdata['user_email']), strpos(str_replace("\'", "''", $userdata['user_email']), "@")) . "'";
}
if ( !($result = $db->sql_query($sql)) )
{
message_die(CRITICAL_ERROR, 'Could not obtain ban information', '', __LINE__, __FILE__, $sql);
}
if ( $ban_info = $db->sql_fetchrow($result) )
{
if ( $ban_info['ban_ip'] || $ban_info['ban_userid'] || $ban_info['ban_email'] )
{
message_die(CRITICAL_MESSAGE, 'You_been_banned');
}
}
//
// Create or update the session
//
$sql = "UPDATE " . SESSIONS_TABLE . "
SET session_user_id = $user_id, session_start = $current_time, session_time = $current_time, session_page = $page_id, session_logged_in = $login, session_admin = $admin
WHERE session_id = '" . $session_id . "'
AND session_ip = '$user_ip'";
if ( !$db->sql_query($sql) || !$db->sql_affectedrows() )
{
$session_id = md5(dss_rand());
$priv_session_id = md5(dss_rand());
$sql = "INSERT INTO " . SESSIONS_TABLE . "
(session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin, priv_session_id)
VALUES ('$session_id', $user_id, $current_time, $current_time, '$user_ip', $page_id, $login, $admin, '$priv_session_id')";
if ( !$db->sql_query($sql) )
{
message_die(CRITICAL_ERROR, 'Error creating new session', '', __LINE__, __FILE__, $sql);
}
}
if ( $user_id != ANONYMOUS )
{
$last_visit = ( $userdata['user_session_time'] > 0 ) ? $userdata['user_session_time'] : $current_time;
if (!$admin)
{
$sql = "UPDATE " . USERS_TABLE . "
SET user_session_time = $current_time, user_session_page = $page_id, user_lastvisit = $last_visit
WHERE user_id = $user_id";
if ( !$db->sql_query($sql) )
{
message_die(CRITICAL_ERROR, 'Error updating last visit time', '', __LINE__, __FILE__, $sql);
}
}
$userdata['user_lastvisit'] = $last_visit;
//
// Regenerate the auto-login key
//
if ($enable_autologin)
{
$auto_login_key = dss_rand() . dss_rand();
if (isset($sessiondata['autologinid']) && (string) $sessiondata['autologinid'] != '')
{
$sql = 'UPDATE ' . SESSIONS_KEYS_TABLE . "
SET last_ip = '$user_ip', key_id = '" . md5($auto_login_key) . "', last_login = $current_time
WHERE key_id = '" . md5($sessiondata['autologinid']) . "'";
}
else
{
$sql = 'INSERT INTO ' . SESSIONS_KEYS_TABLE . "(key_id, user_id, last_ip, last_login)
VALUES ('" . md5($auto_login_key) . "', $user_id, '$user_ip', $current_time)";
}
if ( !$db->sql_query($sql) )
{
message_die(CRITICAL_ERROR, 'Error updating session key', '', __LINE__, __FILE__, $sql);
}
$sessiondata['autologinid'] = $auto_login_key;
unset($auto_login_key);
}
else
{
$sessiondata['autologinid'] = '';
}
// $sessiondata['autologinid'] = (!$admin) ? (( $enable_autologin && $sessionmethod == SESSION_METHOD_COOKIE ) ? $auto_login_key : '') : $sessiondata['autologinid'];
$sessiondata['userid'] = $user_id;
}
$userdata['session_id'] = $session_id;
$userdata['priv_session_id'] = $priv_session_id;
$userdata['session_ip'] = $user_ip;
$userdata['session_user_id'] = $user_id;
$userdata['session_logged_in'] = $login;
$userdata['session_page'] = $page_id;
$userdata['session_start'] = $current_time;
$userdata['session_time'] = $current_time;
$userdata['session_admin'] = $admin;
$userdata['session_key'] = $sessiondata['autologinid'];
setcookie($cookiename . '_data', serialize($sessiondata), $current_time + 31536000, $cookiepath, $cookiedomain, $cookiesecure);
setcookie($cookiename . '_sid', $session_id, 0, $cookiepath, $cookiedomain, $cookiesecure);
$SID = 'sid=' . $session_id;
return $userdata;
}
//
// Checks for a given user session, tidies session table and updates user
// sessions at each page refresh
//
function session_pagestart($user_ip, $thispage_id)
{
global $db, $lang, $board_config;
global $HTTP_COOKIE_VARS, $HTTP_GET_VARS, $SID, $P_SID;
$cookiename = $board_config['cookie_name'];
$cookiepath = $board_config['cookie_path'];
$cookiedomain = $board_config['cookie_domain'];
$cookiesecure = $board_config['cookie_secure'];
$current_time = time();
unset($userdata);
if ( isset($HTTP_COOKIE_VARS[$cookiename . '_sid']) || isset($HTTP_COOKIE_VARS[$cookiename . '_data']) )
{
$sessiondata = isset( $HTTP_COOKIE_VARS[$cookiename . '_data'] ) ? unserialize(stripslashes($HTTP_COOKIE_VARS[$cookiename . '_data'])) : array();
$session_id = isset( $HTTP_COOKIE_VARS[$cookiename . '_sid'] ) ? $HTTP_COOKIE_VARS[$cookiename . '_sid'] : '';
$sessionmethod = SESSION_METHOD_COOKIE;
}
else
{
$sessiondata = array();
$session_id = ( isset($HTTP_GET_VARS['sid']) ) ? $HTTP_GET_VARS['sid'] : '';
$sessionmethod = SESSION_METHOD_GET;
}
//
if (!preg_match('/^[A-Za-z0-9]*$/', $session_id))
{
$session_id = '';
}
$thispage_id = (int) $thispage_id;
//
// Does a session exist?
//
if ( !empty($session_id) )
{
//
// session_id exists so go ahead and attempt to grab all
// data in preparation
//
$sql = "SELECT u.*, s.*
FROM " . SESSIONS_TABLE . " s, " . USERS_TABLE . " u
WHERE s.session_id = '$session_id'
AND u.user_id = s.session_user_id";
if ( !($result = $db->sql_query($sql)) )
{
message_die(CRITICAL_ERROR, 'Error doing DB query userdata row fetch', '', __LINE__, __FILE__, $sql);
}
$userdata = $db->sql_fetchrow($result);
//
// Did the session exist in the DB?
//
if ( isset($userdata['user_id']) )
{
//
// Do not check IP assuming equivalence, if IPv4 we'll check only first 24
// bits ... I've been told (by vHiker) this should alleviate problems with
// load balanced et al proxies while retaining some reliance on IP security.
//
$ip_check_s = substr($userdata['session_ip'], 0, 6);
$ip_check_u = substr($user_ip, 0, 6);
if ($ip_check_s == $ip_check_u)
{
$SID = ($sessionmethod == SESSION_METHOD_GET || defined('IN_ADMIN')) ? 'sid=' . $session_id : '';
$P_SID = (defined('IN_ADMIN')) ? 'p_sid=' . $userdata['priv_session_id'] : '';
//
// Only update session DB a minute or so after last update
//
if ( $current_time - $userdata['session_time'] > 60 )
{
// A little trick to reset session_admin on session re-usage
$update_admin = (!defined('IN_ADMIN') && $current_time - $userdata['session_time'] > ($board_config['session_length']+60)) ? ', session_admin = 0' : '';
$sql = "UPDATE " . SESSIONS_TABLE . "
SET session_time = $current_time, session_page = $thispage_id$update_admin
WHERE session_id = '" . $userdata['session_id'] . "'";
if ( !$db->sql_query($sql) )
{
message_die(CRITICAL_ERROR, 'Error updating sessions table', '', __LINE__, __FILE__, $sql);
}
if ( $userdata['user_id'] != ANONYMOUS )
{
$sql = "UPDATE " . USERS_TABLE . "
SET user_session_time = $current_time, user_session_page = $thispage_id
WHERE user_id = " . $userdata['user_id'];
if ( !$db->sql_query($sql) )
{
message_die(CRITICAL_ERROR, 'Error updating sessions table', '', __LINE__, __FILE__, $sql);
}
}
session_clean($userdata['session_id']);
setcookie($cookiename . '_data', serialize($sessiondata), $current_time + 31536000, $cookiepath, $cookiedomain, $cookiesecure);
setcookie($cookiename . '_sid', $session_id, 0, $cookiepath, $cookiedomain, $cookiesecure);
}
// Add the session_key to the userdata array if it is set
if ( isset($sessiondata['autologinid']) && $sessiondata['autologinid'] != '' )
{
$userdata['session_key'] = $sessiondata['autologinid'];
}
return $userdata;
}
}
}
//
// If we reach here then no (valid) session exists. So we'll create a new one,
// using the cookie user_id if available to pull basic user prefs.
//
$user_id = ( isset($sessiondata['userid']) ) ? intval($sessiondata['userid']) : ANONYMOUS;
if ( !($userdata = session_begin($user_id, $user_ip, $thispage_id, TRUE)) )
{
message_die(CRITICAL_ERROR, 'Error creating user session', '', __LINE__, __FILE__, $sql);
}
return $userdata;
}
/**
* Terminates the specified session
* It will delete the entry in the sessions table for this session,
* remove the corresponding auto-login key and reset the cookies
*/
function session_end($session_id, $user_id)
{
global $db, $lang, $board_config, $userdata;
global $HTTP_COOKIE_VARS, $HTTP_GET_VARS, $SID;
$cookiename = $board_config['cookie_name'];
$cookiepath = $board_config['cookie_path'];
$cookiedomain = $board_config['cookie_domain'];
$cookiesecure = $board_config['cookie_secure'];
$current_time = time();
if (!preg_match('/^[A-Za-z0-9]*$/', $session_id))
{
return;
}
//
// Delete existing session
//
$sql = 'DELETE FROM ' . SESSIONS_TABLE . "
WHERE session_id = '$session_id'
AND session_user_id = $user_id";
if ( !$db->sql_query($sql) )
{
message_die(CRITICAL_ERROR, 'Error removing user session', '', __LINE__, __FILE__, $sql);
}
//
// Remove this auto-login entry (if applicable)
//
if ( isset($userdata['session_key']) && $userdata['session_key'] != '' )
{
$autologin_key = md5($userdata['session_key']);
$sql = 'DELETE FROM ' . SESSIONS_KEYS_TABLE . '
WHERE user_id = ' . (int) $user_id . "
AND key_id = '$autologin_key'";
if ( !$db->sql_query($sql) )
{
message_die(CRITICAL_ERROR, 'Error removing auto-login key', '', __LINE__, __FILE__, $sql);
}
}
//
// We expect that message_die will be called after this function,
// but just in case it isn't, reset $userdata to the details for a guest
//
$sql = 'SELECT *
FROM ' . USERS_TABLE . '
WHERE user_id = ' . ANONYMOUS;
if ( !($result = $db->sql_query($sql)) )
{
message_die(CRITICAL_ERROR, 'Error obtaining user details', '', __LINE__, __FILE__, $sql);
}
if ( !($userdata = $db->sql_fetchrow($result)) )
{
message_die(CRITICAL_ERROR, 'Error obtaining user details', '', __LINE__, __FILE__, $sql);
}
$db->sql_freeresult($result);
setcookie($cookiename . '_data', '', $current_time - 31536000, $cookiepath, $cookiedomain, $cookiesecure);
setcookie($cookiename . '_sid', '', $current_time - 31536000, $cookiepath, $cookiedomain, $cookiesecure);
return true;
}
/**
* Removes expired sessions and auto-login keys from the database
*/
function session_clean($session_id)
{
global $board_config, $db;
//
// Delete expired sessions
//
$sql = 'DELETE FROM ' . SESSIONS_TABLE . '
WHERE session_time < ' . (time() - (int) $board_config['session_length']) . "
AND session_id <> '$session_id'";
if ( !$db->sql_query($sql) )
{
message_die(CRITICAL_ERROR, 'Error clearing sessions table', '', __LINE__, __FILE__, $sql);
}
//
// Delete expired auto-login keys
// If max_autologin_time is not set then keys will never be deleted
// (same behaviour as old 2.0.x session code)
//
if (!empty($board_config['max_autologin_time']) && $board_config['max_autologin_time'] > 0)
{
$sql = 'DELETE FROM ' . SESSIONS_KEYS_TABLE . '
WHERE last_login < ' . (time() - (86400 * (int) $board_config['max_autologin_time']));
$db->sql_query($sql);
}
return true;
}
/**
* Reset all login keys for the specified user
* Called on password changes
*/
function session_reset_keys($user_id, $user_ip)
{
global $db, $userdata, $board_config;
$key_sql = ($user_id == $userdata['user_id'] && !empty($userdata['session_key'])) ? "AND key_id != '" . md5($userdata['session_key']) . "'" : '';
$sql = 'DELETE FROM ' . SESSIONS_KEYS_TABLE . '
WHERE user_id = ' . (int) $user_id . "
$key_sql";
if ( !$db->sql_query($sql) )
{
message_die(CRITICAL_ERROR, 'Error removing auto-login keys', '', __LINE__, __FILE__, $sql);
}
$where_sql = 'session_user_id = ' . (int) $user_id;
$where_sql .= ($user_id == $userdata['user_id']) ? " AND session_id <> '" . $userdata['session_id'] . "'" : '';
$sql = 'DELETE FROM ' . SESSIONS_TABLE . "
WHERE $where_sql";
if ( !$db->sql_query($sql) )
{
message_die(CRITICAL_ERROR, 'Error removing user session(s)', '', __LINE__, __FILE__, $sql);
}
if ( !empty($key_sql) )
{
$auto_login_key = dss_rand() . dss_rand();
$current_time = time();
$sql = 'UPDATE ' . SESSIONS_KEYS_TABLE . "
SET last_ip = '$user_ip', key_id = '" . md5($auto_login_key) . "', last_login = $current_time
WHERE key_id = '" . md5($userdata['session_key']) . "'";
if ( !$db->sql_query($sql) )
{
message_die(CRITICAL_ERROR, 'Error updating session key', '', __LINE__, __FILE__, $sql);
}
// And now rebuild the cookie
$sessiondata['userid'] = $user_id;
$sessiondata['autologinid'] = $auto_login_key;
$cookiename = $board_config['cookie_name'];
$cookiepath = $board_config['cookie_path'];
$cookiedomain = $board_config['cookie_domain'];
$cookiesecure = $board_config['cookie_secure'];
setcookie($cookiename . '_data', serialize($sessiondata), $current_time + 31536000, $cookiepath, $cookiedomain, $cookiesecure);
$userdata['session_key'] = $auto_login_key;
unset($sessiondata);
unset($auto_login_key);
}
}
//
// Append $SID to a url. Borrowed from phplib and modified. This is an
// extra routine utilised by the session code above and acts as a wrapper
// around every single URL and form action. If you replace the session
// code you must include this routine, even if it's empty.
//
function append_sid($url, $non_html_amp = false)
{
global $SID, $P_SID;
if ( !empty($SID) && !preg_match('#sid=#', $url) )
{
$url .= ( ( strpos($url, '?') !== false ) ? ( ( $non_html_amp ) ? '&' : '&' ) : '?' ) . $SID;
}
if ( !empty($P_SID) && !preg_match('#p_sid=#', $url) )
{
$url .= ( ( strpos($url, '?') !== false ) ? ( ( $non_html_amp ) ? '&' : '&' ) : '?' ) . $P_SID;
}
return $url;
}
?>