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PHP Cross Reference of phpBB-3.2.11-deutsch |
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1 <?php 2 /** 3 * 4 * This file is part of the phpBB Forum Software package. 5 * 6 * @copyright (c) phpBB Limited <https://www.phpbb.com> 7 * @license GNU General Public License, version 2 (GPL-2.0) 8 * 9 * For full copyright and license information, please see 10 * the docs/CREDITS.txt file. 11 * 12 */ 13 14 namespace phpbb; 15 16 /** 17 * Session class 18 */ 19 class session 20 { 21 var $cookie_data = array(); 22 var $page = array(); 23 var $data = array(); 24 var $browser = ''; 25 var $forwarded_for = ''; 26 var $host = ''; 27 var $session_id = ''; 28 var $ip = ''; 29 var $load = 0; 30 var $time_now = 0; 31 var $update_session_page = true; 32 33 /** 34 * Extract current session page 35 * 36 * @param string $root_path current root path (phpbb_root_path) 37 * @return array 38 */ 39 static function extract_current_page($root_path) 40 { 41 global $request, $symfony_request, $phpbb_filesystem; 42 43 $page_array = array(); 44 45 // First of all, get the request uri... 46 $script_name = $request->escape($symfony_request->getScriptName(), true); 47 $args = $request->escape(explode('&', $symfony_request->getQueryString()), true); 48 49 // If we are unable to get the script name we use REQUEST_URI as a failover and note it within the page array for easier support... 50 if (!$script_name) 51 { 52 $script_name = htmlspecialchars_decode($request->server('REQUEST_URI')); 53 $script_name = (($pos = strpos($script_name, '?')) !== false) ? substr($script_name, 0, $pos) : $script_name; 54 $page_array['failover'] = 1; 55 } 56 57 // Replace backslashes and doubled slashes (could happen on some proxy setups) 58 $script_name = str_replace(array('\\', '//'), '/', $script_name); 59 60 // Now, remove the sid and let us get a clean query string... 61 $use_args = array(); 62 63 // Since some browser do not encode correctly we need to do this with some "special" characters... 64 // " -> %22, ' => %27, < -> %3C, > -> %3E 65 $find = array('"', "'", '<', '>', '"', '<', '>'); 66 $replace = array('%22', '%27', '%3C', '%3E', '%22', '%3C', '%3E'); 67 68 foreach ($args as $key => $argument) 69 { 70 if (strpos($argument, 'sid=') === 0) 71 { 72 continue; 73 } 74 75 $use_args[] = str_replace($find, $replace, $argument); 76 } 77 unset($args); 78 79 // The following examples given are for an request uri of {path to the phpbb directory}/adm/index.php?i=10&b=2 80 81 // The current query string 82 $query_string = trim(implode('&', $use_args)); 83 84 // basenamed page name (for example: index.php) 85 $page_name = (substr($script_name, -1, 1) == '/') ? '' : basename($script_name); 86 $page_name = urlencode(htmlspecialchars($page_name)); 87 88 $symfony_request_path = $phpbb_filesystem->clean_path($symfony_request->getPathInfo()); 89 if ($symfony_request_path !== '/') 90 { 91 $page_name .= str_replace('%2F', '/', urlencode($symfony_request_path)); 92 } 93 94 if (substr($root_path, 0, 2) === './' && strpos($root_path, '..') === false) 95 { 96 $root_dirs = explode('/', str_replace('\\', '/', rtrim($root_path, '/'))); 97 $page_dirs = explode('/', str_replace('\\', '/', '.')); 98 } 99 else 100 { 101 // current directory within the phpBB root (for example: adm) 102 $root_dirs = explode('/', str_replace('\\', '/', $phpbb_filesystem->realpath($root_path))); 103 $page_dirs = explode('/', str_replace('\\', '/', $phpbb_filesystem->realpath('./'))); 104 } 105 106 $intersection = array_intersect_assoc($root_dirs, $page_dirs); 107 108 $root_dirs = array_diff_assoc($root_dirs, $intersection); 109 $page_dirs = array_diff_assoc($page_dirs, $intersection); 110 111 $page_dir = str_repeat('../', count($root_dirs)) . implode('/', $page_dirs); 112 113 if ($page_dir && substr($page_dir, -1, 1) == '/') 114 { 115 $page_dir = substr($page_dir, 0, -1); 116 } 117 118 // Current page from phpBB root (for example: adm/index.php?i=10&b=2) 119 $page = (($page_dir) ? $page_dir . '/' : '') . $page_name; 120 if ($query_string) 121 { 122 $page .= '?' . $query_string; 123 } 124 125 // The script path from the webroot to the current directory (for example: /phpBB3/adm/) : always prefixed with / and ends in / 126 $script_path = $symfony_request->getBasePath(); 127 128 // The script path from the webroot to the phpBB root (for example: /phpBB3/) 129 $script_dirs = explode('/', $script_path); 130 array_splice($script_dirs, -count($page_dirs)); 131 $root_script_path = implode('/', $script_dirs) . (count($root_dirs) ? '/' . implode('/', $root_dirs) : ''); 132 133 // We are on the base level (phpBB root == webroot), lets adjust the variables a bit... 134 if (!$root_script_path) 135 { 136 $root_script_path = ($page_dir) ? str_replace($page_dir, '', $script_path) : $script_path; 137 } 138 139 $script_path .= (substr($script_path, -1, 1) == '/') ? '' : '/'; 140 $root_script_path .= (substr($root_script_path, -1, 1) == '/') ? '' : '/'; 141 142 $forum_id = $request->variable('f', 0); 143 // maximum forum id value is maximum value of mediumint unsigned column 144 $forum_id = ($forum_id > 0 && $forum_id < 16777215) ? $forum_id : 0; 145 146 $page_array += array( 147 'page_name' => $page_name, 148 'page_dir' => $page_dir, 149 150 'query_string' => $query_string, 151 'script_path' => str_replace(' ', '%20', htmlspecialchars($script_path)), 152 'root_script_path' => str_replace(' ', '%20', htmlspecialchars($root_script_path)), 153 154 'page' => $page, 155 'forum' => $forum_id, 156 ); 157 158 return $page_array; 159 } 160 161 /** 162 * Get valid hostname/port. HTTP_HOST is used, SERVER_NAME if HTTP_HOST not present. 163 */ 164 function extract_current_hostname() 165 { 166 global $config, $request; 167 168 // Get hostname 169 $host = htmlspecialchars_decode($request->header('Host', $request->server('SERVER_NAME'))); 170 171 // Should be a string and lowered 172 $host = (string) strtolower($host); 173 174 // If host is equal the cookie domain or the server name (if config is set), then we assume it is valid 175 if ((isset($config['cookie_domain']) && $host === $config['cookie_domain']) || (isset($config['server_name']) && $host === $config['server_name'])) 176 { 177 return $host; 178 } 179 180 // Is the host actually a IP? If so, we use the IP... (IPv4) 181 if (long2ip(ip2long($host)) === $host) 182 { 183 return $host; 184 } 185 186 // Now return the hostname (this also removes any port definition). The http:// is prepended to construct a valid URL, hosts never have a scheme assigned 187 $host = @parse_url('http://' . $host); 188 $host = (!empty($host['host'])) ? $host['host'] : ''; 189 190 // Remove any portions not removed by parse_url (#) 191 $host = str_replace('#', '', $host); 192 193 // If, by any means, the host is now empty, we will use a "best approach" way to guess one 194 if (empty($host)) 195 { 196 if (!empty($config['server_name'])) 197 { 198 $host = $config['server_name']; 199 } 200 else if (!empty($config['cookie_domain'])) 201 { 202 $host = (strpos($config['cookie_domain'], '.') === 0) ? substr($config['cookie_domain'], 1) : $config['cookie_domain']; 203 } 204 else 205 { 206 // Set to OS hostname or localhost 207 $host = (function_exists('php_uname')) ? php_uname('n') : 'localhost'; 208 } 209 } 210 211 // It may be still no valid host, but for sure only a hostname (we may further expand on the cookie domain... if set) 212 return $host; 213 } 214 215 /** 216 * Start session management 217 * 218 * This is where all session activity begins. We gather various pieces of 219 * information from the client and server. We test to see if a session already 220 * exists. If it does, fine and dandy. If it doesn't we'll go on to create a 221 * new one ... pretty logical heh? We also examine the system load (if we're 222 * running on a system which makes such information readily available) and 223 * halt if it's above an admin definable limit. 224 * 225 * @param bool $update_session_page if true the session page gets updated. 226 * This can be set to circumvent certain scripts to update the users last visited page. 227 */ 228 function session_begin($update_session_page = true) 229 { 230 global $phpEx, $SID, $_SID, $_EXTRA_URL, $db, $config, $phpbb_root_path; 231 global $request, $phpbb_container, $user, $phpbb_log, $phpbb_dispatcher; 232 233 // Give us some basic information 234 $this->time_now = time(); 235 $this->cookie_data = array('u' => 0, 'k' => ''); 236 $this->update_session_page = $update_session_page; 237 $this->browser = $request->header('User-Agent'); 238 $this->referer = $request->header('Referer'); 239 $this->forwarded_for = $request->header('X-Forwarded-For'); 240 241 $this->host = $this->extract_current_hostname(); 242 $this->page = $this->extract_current_page($phpbb_root_path); 243 244 // if the forwarded for header shall be checked we have to validate its contents 245 if ($config['forwarded_for_check']) 246 { 247 $this->forwarded_for = preg_replace('# {2,}#', ' ', str_replace(',', ' ', $this->forwarded_for)); 248 249 // split the list of IPs 250 $ips = explode(' ', $this->forwarded_for); 251 foreach ($ips as $ip) 252 { 253 // check IPv4 first, the IPv6 is hopefully only going to be used very seldomly 254 if (!empty($ip) && !preg_match(get_preg_expression('ipv4'), $ip) && !preg_match(get_preg_expression('ipv6'), $ip)) 255 { 256 // contains invalid data, don't use the forwarded for header 257 $this->forwarded_for = ''; 258 break; 259 } 260 } 261 } 262 else 263 { 264 $this->forwarded_for = ''; 265 } 266 267 if ($request->is_set($config['cookie_name'] . '_sid', \phpbb\request\request_interface::COOKIE) || $request->is_set($config['cookie_name'] . '_u', \phpbb\request\request_interface::COOKIE)) 268 { 269 $this->cookie_data['u'] = $request->variable($config['cookie_name'] . '_u', 0, false, \phpbb\request\request_interface::COOKIE); 270 $this->cookie_data['k'] = $request->variable($config['cookie_name'] . '_k', '', false, \phpbb\request\request_interface::COOKIE); 271 $this->session_id = $request->variable($config['cookie_name'] . '_sid', '', false, \phpbb\request\request_interface::COOKIE); 272 273 $SID = (defined('NEED_SID')) ? '?sid=' . $this->session_id : '?sid='; 274 $_SID = (defined('NEED_SID')) ? $this->session_id : ''; 275 276 if (empty($this->session_id)) 277 { 278 $this->session_id = $_SID = $request->variable('sid', ''); 279 $SID = '?sid=' . $this->session_id; 280 $this->cookie_data = array('u' => 0, 'k' => ''); 281 } 282 } 283 else 284 { 285 $this->session_id = $_SID = $request->variable('sid', ''); 286 $SID = '?sid=' . $this->session_id; 287 } 288 289 $_EXTRA_URL = array(); 290 291 // Why no forwarded_for et al? Well, too easily spoofed. With the results of my recent requests 292 // it's pretty clear that in the majority of cases you'll at least be left with a proxy/cache ip. 293 $ip = htmlspecialchars_decode($request->server('REMOTE_ADDR')); 294 $ip = preg_replace('# {2,}#', ' ', str_replace(',', ' ', $ip)); 295 296 /** 297 * Event to alter user IP address 298 * 299 * @event core.session_ip_after 300 * @var string ip REMOTE_ADDR 301 * @since 3.1.10-RC1 302 */ 303 $vars = array('ip'); 304 extract($phpbb_dispatcher->trigger_event('core.session_ip_after', compact($vars))); 305 306 // split the list of IPs 307 $ips = explode(' ', trim($ip)); 308 309 // Default IP if REMOTE_ADDR is invalid 310 $this->ip = '127.0.0.1'; 311 312 foreach ($ips as $ip) 313 { 314 if (function_exists('phpbb_ip_normalise')) 315 { 316 // Normalise IP address 317 $ip = phpbb_ip_normalise($ip); 318 319 if (empty($ip)) 320 { 321 // IP address is invalid. 322 break; 323 } 324 325 // IP address is valid. 326 $this->ip = $ip; 327 328 // Skip legacy code. 329 continue; 330 } 331 332 if (preg_match(get_preg_expression('ipv4'), $ip)) 333 { 334 $this->ip = $ip; 335 } 336 else if (preg_match(get_preg_expression('ipv6'), $ip)) 337 { 338 // Quick check for IPv4-mapped address in IPv6 339 if (stripos($ip, '::ffff:') === 0) 340 { 341 $ipv4 = substr($ip, 7); 342 343 if (preg_match(get_preg_expression('ipv4'), $ipv4)) 344 { 345 $ip = $ipv4; 346 } 347 } 348 349 $this->ip = $ip; 350 } 351 else 352 { 353 // We want to use the last valid address in the chain 354 // Leave foreach loop when address is invalid 355 break; 356 } 357 } 358 359 $this->load = false; 360 361 // Load limit check (if applicable) 362 if ($config['limit_load'] || $config['limit_search_load']) 363 { 364 if ((function_exists('sys_getloadavg') && $load = sys_getloadavg()) || ($load = explode(' ', @file_get_contents('/proc/loadavg')))) 365 { 366 $this->load = array_slice($load, 0, 1); 367 $this->load = floatval($this->load[0]); 368 } 369 else 370 { 371 $config->set('limit_load', '0'); 372 $config->set('limit_search_load', '0'); 373 } 374 } 375 376 // if no session id is set, redirect to index.php 377 $session_id = $request->variable('sid', ''); 378 if (defined('NEED_SID') && (empty($session_id) || $this->session_id !== $session_id)) 379 { 380 send_status_line(401, 'Unauthorized'); 381 redirect(append_sid("{$phpbb_root_path}index.$phpEx")); 382 } 383 384 // if session id is set 385 if (!empty($this->session_id)) 386 { 387 $sql = 'SELECT u.*, s.* 388 FROM ' . SESSIONS_TABLE . ' s, ' . USERS_TABLE . " u 389 WHERE s.session_id = '" . $db->sql_escape($this->session_id) . "' 390 AND u.user_id = s.session_user_id"; 391 $result = $db->sql_query($sql); 392 $this->data = $db->sql_fetchrow($result); 393 $db->sql_freeresult($result); 394 395 // Did the session exist in the DB? 396 if (isset($this->data['user_id'])) 397 { 398 // Validate IP length according to admin ... enforces an IP 399 // check on bots if admin requires this 400 // $quadcheck = ($config['ip_check_bot'] && $this->data['user_type'] & USER_BOT) ? 4 : $config['ip_check']; 401 402 if (strpos($this->ip, ':') !== false && strpos($this->data['session_ip'], ':') !== false) 403 { 404 $s_ip = short_ipv6($this->data['session_ip'], $config['ip_check']); 405 $u_ip = short_ipv6($this->ip, $config['ip_check']); 406 } 407 else 408 { 409 $s_ip = implode('.', array_slice(explode('.', $this->data['session_ip']), 0, $config['ip_check'])); 410 $u_ip = implode('.', array_slice(explode('.', $this->ip), 0, $config['ip_check'])); 411 } 412 413 $s_browser = ($config['browser_check']) ? trim(strtolower(substr($this->data['session_browser'], 0, 149))) : ''; 414 $u_browser = ($config['browser_check']) ? trim(strtolower(substr($this->browser, 0, 149))) : ''; 415 416 $s_forwarded_for = ($config['forwarded_for_check']) ? substr($this->data['session_forwarded_for'], 0, 254) : ''; 417 $u_forwarded_for = ($config['forwarded_for_check']) ? substr($this->forwarded_for, 0, 254) : ''; 418 419 // referer checks 420 // The @ before $config['referer_validation'] suppresses notices present while running the updater 421 $check_referer_path = (@$config['referer_validation'] == REFERER_VALIDATE_PATH); 422 $referer_valid = true; 423 424 // we assume HEAD and TRACE to be foul play and thus only whitelist GET 425 if (@$config['referer_validation'] && strtolower($request->server('REQUEST_METHOD')) !== 'get') 426 { 427 $referer_valid = $this->validate_referer($check_referer_path); 428 } 429 430 if ($u_ip === $s_ip && $s_browser === $u_browser && $s_forwarded_for === $u_forwarded_for && $referer_valid) 431 { 432 $session_expired = false; 433 434 // Check whether the session is still valid if we have one 435 /* @var $provider_collection \phpbb\auth\provider_collection */ 436 $provider_collection = $phpbb_container->get('auth.provider_collection'); 437 $provider = $provider_collection->get_provider(); 438 439 if (!($provider instanceof \phpbb\auth\provider\provider_interface)) 440 { 441 throw new \RuntimeException($provider . ' must implement \phpbb\auth\provider\provider_interface'); 442 } 443 444 $ret = $provider->validate_session($this->data); 445 if ($ret !== null && !$ret) 446 { 447 $session_expired = true; 448 } 449 450 if (!$session_expired) 451 { 452 // Check the session length timeframe if autologin is not enabled. 453 // Else check the autologin length... and also removing those having autologin enabled but no longer allowed board-wide. 454 if (!$this->data['session_autologin']) 455 { 456 if ($this->data['session_time'] < $this->time_now - ($config['session_length'] + 60)) 457 { 458 $session_expired = true; 459 } 460 } 461 else if (!$config['allow_autologin'] || ($config['max_autologin_time'] && $this->data['session_time'] < $this->time_now - (86400 * (int) $config['max_autologin_time']) + 60)) 462 { 463 $session_expired = true; 464 } 465 } 466 467 if (!$session_expired) 468 { 469 $this->data['is_registered'] = ($this->data['user_id'] != ANONYMOUS && ($this->data['user_type'] == USER_NORMAL || $this->data['user_type'] == USER_FOUNDER)) ? true : false; 470 $this->data['is_bot'] = (!$this->data['is_registered'] && $this->data['user_id'] != ANONYMOUS) ? true : false; 471 $this->data['user_lang'] = basename($this->data['user_lang']); 472 473 // Is user banned? Are they excluded? Won't return on ban, exists within method 474 $this->check_ban_for_current_session($config); 475 476 return true; 477 } 478 } 479 else 480 { 481 // Added logging temporarly to help debug bugs... 482 if (defined('DEBUG') && $this->data['user_id'] != ANONYMOUS) 483 { 484 if ($referer_valid) 485 { 486 $phpbb_log->add('critical', $user->data['user_id'], $user->ip, 'LOG_IP_BROWSER_FORWARDED_CHECK', false, array( 487 $u_ip, 488 $s_ip, 489 $u_browser, 490 $s_browser, 491 htmlspecialchars($u_forwarded_for), 492 htmlspecialchars($s_forwarded_for) 493 )); 494 } 495 else 496 { 497 $phpbb_log->add('critical', $user->data['user_id'], $user->ip, 'LOG_REFERER_INVALID', false, array($this->referer)); 498 } 499 } 500 } 501 } 502 } 503 504 // If we reach here then no (valid) session exists. So we'll create a new one 505 return $this->session_create(); 506 } 507 508 /** 509 * Create a new session 510 * 511 * If upon trying to start a session we discover there is nothing existing we 512 * jump here. Additionally this method is called directly during login to regenerate 513 * the session for the specific user. In this method we carry out a number of tasks; 514 * garbage collection, (search)bot checking, banned user comparison. Basically 515 * though this method will result in a new session for a specific user. 516 */ 517 function session_create($user_id = false, $set_admin = false, $persist_login = false, $viewonline = true) 518 { 519 global $SID, $_SID, $db, $config, $cache, $phpbb_container, $phpbb_dispatcher; 520 521 $this->data = array(); 522 523 /* Garbage collection ... remove old sessions updating user information 524 // if necessary. It means (potentially) 11 queries but only infrequently 525 if ($this->time_now > $config['session_last_gc'] + $config['session_gc']) 526 { 527 $this->session_gc(); 528 }*/ 529 530 // Do we allow autologin on this board? No? Then override anything 531 // that may be requested here 532 if (!$config['allow_autologin']) 533 { 534 $this->cookie_data['k'] = $persist_login = false; 535 } 536 537 /** 538 * Here we do a bot check, oh er saucy! No, not that kind of bot 539 * check. We loop through the list of bots defined by the admin and 540 * see if we have any useragent and/or IP matches. If we do, this is a 541 * bot, act accordingly 542 */ 543 $bot = false; 544 $active_bots = $cache->obtain_bots(); 545 546 foreach ($active_bots as $row) 547 { 548 if ($row['bot_agent'] && preg_match('#' . str_replace('\*', '.*?', preg_quote($row['bot_agent'], '#')) . '#i', $this->browser)) 549 { 550 $bot = $row['user_id']; 551 } 552 553 // If ip is supplied, we will make sure the ip is matching too... 554 if ($row['bot_ip'] && ($bot || !$row['bot_agent'])) 555 { 556 // Set bot to false, then we only have to set it to true if it is matching 557 $bot = false; 558 559 foreach (explode(',', $row['bot_ip']) as $bot_ip) 560 { 561 $bot_ip = trim($bot_ip); 562 563 if (!$bot_ip) 564 { 565 continue; 566 } 567 568 if (strpos($this->ip, $bot_ip) === 0) 569 { 570 $bot = (int) $row['user_id']; 571 break; 572 } 573 } 574 } 575 576 if ($bot) 577 { 578 break; 579 } 580 } 581 582 /* @var $provider_collection \phpbb\auth\provider_collection */ 583 $provider_collection = $phpbb_container->get('auth.provider_collection'); 584 $provider = $provider_collection->get_provider(); 585 $this->data = $provider->autologin(); 586 587 if ($user_id !== false && isset($this->data['user_id']) && $this->data['user_id'] != $user_id) 588 { 589 $this->data = array(); 590 } 591 592 if (isset($this->data['user_id'])) 593 { 594 $this->cookie_data['k'] = ''; 595 $this->cookie_data['u'] = $this->data['user_id']; 596 } 597 598 // If we're presented with an autologin key we'll join against it. 599 // Else if we've been passed a user_id we'll grab data based on that 600 if (isset($this->cookie_data['k']) && $this->cookie_data['k'] && $this->cookie_data['u'] && empty($this->data)) 601 { 602 $sql = 'SELECT u.* 603 FROM ' . USERS_TABLE . ' u, ' . SESSIONS_KEYS_TABLE . ' k 604 WHERE u.user_id = ' . (int) $this->cookie_data['u'] . ' 605 AND u.user_type IN (' . USER_NORMAL . ', ' . USER_FOUNDER . ") 606 AND k.user_id = u.user_id 607 AND k.key_id = '" . $db->sql_escape(md5($this->cookie_data['k'])) . "'"; 608 $result = $db->sql_query($sql); 609 $user_data = $db->sql_fetchrow($result); 610 611 if ($user_id === false || (isset($user_data['user_id']) && $user_id == $user_data['user_id'])) 612 { 613 $this->data = $user_data; 614 $bot = false; 615 } 616 617 $db->sql_freeresult($result); 618 } 619 620 if ($user_id !== false && empty($this->data)) 621 { 622 $this->cookie_data['k'] = ''; 623 $this->cookie_data['u'] = $user_id; 624 625 $sql = 'SELECT * 626 FROM ' . USERS_TABLE . ' 627 WHERE user_id = ' . (int) $this->cookie_data['u'] . ' 628 AND user_type IN (' . USER_NORMAL . ', ' . USER_FOUNDER . ')'; 629 $result = $db->sql_query($sql); 630 $this->data = $db->sql_fetchrow($result); 631 $db->sql_freeresult($result); 632 $bot = false; 633 } 634 635 // Bot user, if they have a SID in the Request URI we need to get rid of it 636 // otherwise they'll index this page with the SID, duplicate content oh my! 637 if ($bot && isset($_GET['sid'])) 638 { 639 send_status_line(301, 'Moved Permanently'); 640 redirect(build_url(array('sid'))); 641 } 642 643 // If no data was returned one or more of the following occurred: 644 // Key didn't match one in the DB 645 // User does not exist 646 // User is inactive 647 // User is bot 648 if (!is_array($this->data) || !count($this->data)) 649 { 650 $this->cookie_data['k'] = ''; 651 $this->cookie_data['u'] = ($bot) ? $bot : ANONYMOUS; 652 653 if (!$bot) 654 { 655 $sql = 'SELECT * 656 FROM ' . USERS_TABLE . ' 657 WHERE user_id = ' . (int) $this->cookie_data['u']; 658 } 659 else 660 { 661 // We give bots always the same session if it is not yet expired. 662 $sql = 'SELECT u.*, s.* 663 FROM ' . USERS_TABLE . ' u 664 LEFT JOIN ' . SESSIONS_TABLE . ' s ON (s.session_user_id = u.user_id) 665 WHERE u.user_id = ' . (int) $bot; 666 } 667 668 $result = $db->sql_query($sql); 669 $this->data = $db->sql_fetchrow($result); 670 $db->sql_freeresult($result); 671 } 672 673 if ($this->data['user_id'] != ANONYMOUS && !$bot) 674 { 675 $this->data['session_last_visit'] = (isset($this->data['session_time']) && $this->data['session_time']) ? $this->data['session_time'] : (($this->data['user_lastvisit']) ? $this->data['user_lastvisit'] : time()); 676 } 677 else 678 { 679 $this->data['session_last_visit'] = $this->time_now; 680 } 681 682 // Force user id to be integer... 683 $this->data['user_id'] = (int) $this->data['user_id']; 684 685 // At this stage we should have a filled data array, defined cookie u and k data. 686 // data array should contain recent session info if we're a real user and a recent 687 // session exists in which case session_id will also be set 688 689 // Is user banned? Are they excluded? Won't return on ban, exists within method 690 $this->check_ban_for_current_session($config); 691 692 $this->data['is_registered'] = (!$bot && $this->data['user_id'] != ANONYMOUS && ($this->data['user_type'] == USER_NORMAL || $this->data['user_type'] == USER_FOUNDER)) ? true : false; 693 $this->data['is_bot'] = ($bot) ? true : false; 694 695 // If our friend is a bot, we re-assign a previously assigned session 696 if ($this->data['is_bot'] && $bot == $this->data['user_id'] && $this->data['session_id']) 697 { 698 // Only assign the current session if the ip, browser and forwarded_for match... 699 if (strpos($this->ip, ':') !== false && strpos($this->data['session_ip'], ':') !== false) 700 { 701 $s_ip = short_ipv6($this->data['session_ip'], $config['ip_check']); 702 $u_ip = short_ipv6($this->ip, $config['ip_check']); 703 } 704 else 705 { 706 $s_ip = implode('.', array_slice(explode('.', $this->data['session_ip']), 0, $config['ip_check'])); 707 $u_ip = implode('.', array_slice(explode('.', $this->ip), 0, $config['ip_check'])); 708 } 709 710 $s_browser = ($config['browser_check']) ? trim(strtolower(substr($this->data['session_browser'], 0, 149))) : ''; 711 $u_browser = ($config['browser_check']) ? trim(strtolower(substr($this->browser, 0, 149))) : ''; 712 713 $s_forwarded_for = ($config['forwarded_for_check']) ? substr($this->data['session_forwarded_for'], 0, 254) : ''; 714 $u_forwarded_for = ($config['forwarded_for_check']) ? substr($this->forwarded_for, 0, 254) : ''; 715 716 if ($u_ip === $s_ip && $s_browser === $u_browser && $s_forwarded_for === $u_forwarded_for) 717 { 718 $this->session_id = $this->data['session_id']; 719 720 // Only update session DB a minute or so after last update or if page changes 721 if ($this->time_now - $this->data['session_time'] > 60 || ($this->update_session_page && $this->data['session_page'] != $this->page['page'])) 722 { 723 // Update the last visit time 724 $sql = 'UPDATE ' . USERS_TABLE . ' 725 SET user_lastvisit = ' . (int) $this->data['session_time'] . ' 726 WHERE user_id = ' . (int) $this->data['user_id']; 727 $db->sql_query($sql); 728 } 729 730 $SID = '?sid='; 731 $_SID = ''; 732 return true; 733 } 734 else 735 { 736 // If the ip and browser does not match make sure we only have one bot assigned to one session 737 $db->sql_query('DELETE FROM ' . SESSIONS_TABLE . ' WHERE session_user_id = ' . $this->data['user_id']); 738 } 739 } 740 741 $session_autologin = (($this->cookie_data['k'] || $persist_login) && $this->data['is_registered']) ? true : false; 742 $set_admin = ($set_admin && $this->data['is_registered']) ? true : false; 743 744 // Create or update the session 745 $sql_ary = array( 746 'session_user_id' => (int) $this->data['user_id'], 747 'session_start' => (int) $this->time_now, 748 'session_last_visit' => (int) $this->data['session_last_visit'], 749 'session_time' => (int) $this->time_now, 750 'session_browser' => (string) trim(substr($this->browser, 0, 149)), 751 'session_forwarded_for' => (string) $this->forwarded_for, 752 'session_ip' => (string) $this->ip, 753 'session_autologin' => ($session_autologin) ? 1 : 0, 754 'session_admin' => ($set_admin) ? 1 : 0, 755 'session_viewonline' => ($viewonline) ? 1 : 0, 756 ); 757 758 if ($this->update_session_page) 759 { 760 $sql_ary['session_page'] = (string) substr($this->page['page'], 0, 199); 761 $sql_ary['session_forum_id'] = $this->page['forum']; 762 } 763 764 $db->sql_return_on_error(true); 765 766 $sql = 'DELETE 767 FROM ' . SESSIONS_TABLE . ' 768 WHERE session_id = \'' . $db->sql_escape($this->session_id) . '\' 769 AND session_user_id = ' . ANONYMOUS; 770 771 if (!defined('IN_ERROR_HANDLER') && (!$this->session_id || !$db->sql_query($sql) || !$db->sql_affectedrows())) 772 { 773 // Limit new sessions in 1 minute period (if required) 774 if (empty($this->data['session_time']) && $config['active_sessions']) 775 { 776 // $db->sql_return_on_error(false); 777 778 $sql = 'SELECT COUNT(session_id) AS sessions 779 FROM ' . SESSIONS_TABLE . ' 780 WHERE session_time >= ' . ($this->time_now - 60); 781 $result = $db->sql_query($sql); 782 $row = $db->sql_fetchrow($result); 783 $db->sql_freeresult($result); 784 785 if ((int) $row['sessions'] > (int) $config['active_sessions']) 786 { 787 send_status_line(503, 'Service Unavailable'); 788 trigger_error('BOARD_UNAVAILABLE'); 789 } 790 } 791 } 792 793 // Since we re-create the session id here, the inserted row must be unique. Therefore, we display potential errors. 794 // Commented out because it will not allow forums to update correctly 795 // $db->sql_return_on_error(false); 796 797 // Something quite important: session_page always holds the *last* page visited, except for the *first* visit. 798 // We are not able to simply have an empty session_page btw, therefore we need to tell phpBB how to detect this special case. 799 // If the session id is empty, we have a completely new one and will set an "identifier" here. This identifier is able to be checked later. 800 if (empty($this->data['session_id'])) 801 { 802 // This is a temporary variable, only set for the very first visit 803 $this->data['session_created'] = true; 804 } 805 806 $this->session_id = $this->data['session_id'] = md5(unique_id()); 807 808 $sql_ary['session_id'] = (string) $this->session_id; 809 $sql_ary['session_page'] = (string) substr($this->page['page'], 0, 199); 810 $sql_ary['session_forum_id'] = $this->page['forum']; 811 812 $sql = 'INSERT INTO ' . SESSIONS_TABLE . ' ' . $db->sql_build_array('INSERT', $sql_ary); 813 $db->sql_query($sql); 814 815 $db->sql_return_on_error(false); 816 817 // Regenerate autologin/persistent login key 818 if ($session_autologin) 819 { 820 $this->set_login_key(); 821 } 822 823 // refresh data 824 $SID = '?sid=' . $this->session_id; 825 $_SID = $this->session_id; 826 $this->data = array_merge($this->data, $sql_ary); 827 828 if (!$bot) 829 { 830 $cookie_expire = $this->time_now + (($config['max_autologin_time']) ? 86400 * (int) $config['max_autologin_time'] : 31536000); 831 832 $this->set_cookie('u', $this->cookie_data['u'], $cookie_expire); 833 $this->set_cookie('k', $this->cookie_data['k'], $cookie_expire); 834 $this->set_cookie('sid', $this->session_id, $cookie_expire); 835 836 unset($cookie_expire); 837 838 $sql = 'SELECT COUNT(session_id) AS sessions 839 FROM ' . SESSIONS_TABLE . ' 840 WHERE session_user_id = ' . (int) $this->data['user_id'] . ' 841 AND session_time >= ' . (int) ($this->time_now - (max((int) $config['session_length'], (int) $config['form_token_lifetime']))); 842 $result = $db->sql_query($sql); 843 $row = $db->sql_fetchrow($result); 844 $db->sql_freeresult($result); 845 846 if ((int) $row['sessions'] <= 1 || empty($this->data['user_form_salt'])) 847 { 848 $this->data['user_form_salt'] = unique_id(); 849 // Update the form key 850 $sql = 'UPDATE ' . USERS_TABLE . ' 851 SET user_form_salt = \'' . $db->sql_escape($this->data['user_form_salt']) . '\' 852 WHERE user_id = ' . (int) $this->data['user_id']; 853 $db->sql_query($sql); 854 } 855 } 856 else 857 { 858 $this->data['session_time'] = $this->data['session_last_visit'] = $this->time_now; 859 860 // Update the last visit time 861 $sql = 'UPDATE ' . USERS_TABLE . ' 862 SET user_lastvisit = ' . (int) $this->data['session_time'] . ' 863 WHERE user_id = ' . (int) $this->data['user_id']; 864 $db->sql_query($sql); 865 866 $SID = '?sid='; 867 $_SID = ''; 868 } 869 870 $session_data = $sql_ary; 871 /** 872 * Event to send new session data to extension 873 * Read-only event 874 * 875 * @event core.session_create_after 876 * @var array session_data Associative array of session keys to be updated 877 * @since 3.1.6-RC1 878 */ 879 $vars = array('session_data'); 880 extract($phpbb_dispatcher->trigger_event('core.session_create_after', compact($vars))); 881 unset($session_data); 882 883 return true; 884 } 885 886 /** 887 * Kills a session 888 * 889 * This method does what it says on the tin. It will delete a pre-existing session. 890 * It resets cookie information (destroying any autologin key within that cookie data) 891 * and update the users information from the relevant session data. It will then 892 * grab guest user information. 893 */ 894 function session_kill($new_session = true) 895 { 896 global $SID, $_SID, $db, $phpbb_container, $phpbb_dispatcher; 897 898 $sql = 'DELETE FROM ' . SESSIONS_TABLE . " 899 WHERE session_id = '" . $db->sql_escape($this->session_id) . "' 900 AND session_user_id = " . (int) $this->data['user_id']; 901 $db->sql_query($sql); 902 903 $user_id = (int) $this->data['user_id']; 904 $session_id = $this->session_id; 905 /** 906 * Event to send session kill information to extension 907 * Read-only event 908 * 909 * @event core.session_kill_after 910 * @var int user_id user_id of the session user. 911 * @var string session_id current user's session_id 912 * @var bool new_session should we create new session for user 913 * @since 3.1.6-RC1 914 */ 915 $vars = array('user_id', 'session_id', 'new_session'); 916 extract($phpbb_dispatcher->trigger_event('core.session_kill_after', compact($vars))); 917 unset($user_id); 918 unset($session_id); 919 920 // Allow connecting logout with external auth method logout 921 /* @var $provider_collection \phpbb\auth\provider_collection */ 922 $provider_collection = $phpbb_container->get('auth.provider_collection'); 923 $provider = $provider_collection->get_provider(); 924 $provider->logout($this->data, $new_session); 925 926 if ($this->data['user_id'] != ANONYMOUS) 927 { 928 // Delete existing session, update last visit info first! 929 if (!isset($this->data['session_time'])) 930 { 931 $this->data['session_time'] = time(); 932 } 933 934 $sql = 'UPDATE ' . USERS_TABLE . ' 935 SET user_lastvisit = ' . (int) $this->data['session_time'] . ' 936 WHERE user_id = ' . (int) $this->data['user_id']; 937 $db->sql_query($sql); 938 939 if ($this->cookie_data['k']) 940 { 941 $sql = 'DELETE FROM ' . SESSIONS_KEYS_TABLE . ' 942 WHERE user_id = ' . (int) $this->data['user_id'] . " 943 AND key_id = '" . $db->sql_escape(md5($this->cookie_data['k'])) . "'"; 944 $db->sql_query($sql); 945 } 946 947 // Reset the data array 948 $this->data = array(); 949 950 $sql = 'SELECT * 951 FROM ' . USERS_TABLE . ' 952 WHERE user_id = ' . ANONYMOUS; 953 $result = $db->sql_query($sql); 954 $this->data = $db->sql_fetchrow($result); 955 $db->sql_freeresult($result); 956 } 957 958 $cookie_expire = $this->time_now - 31536000; 959 $this->set_cookie('u', '', $cookie_expire); 960 $this->set_cookie('k', '', $cookie_expire); 961 $this->set_cookie('sid', '', $cookie_expire); 962 unset($cookie_expire); 963 964 $SID = '?sid='; 965 $this->session_id = $_SID = ''; 966 967 // To make sure a valid session is created we create one for the anonymous user 968 if ($new_session) 969 { 970 $this->session_create(ANONYMOUS); 971 } 972 973 return true; 974 } 975 976 /** 977 * Session garbage collection 978 * 979 * This looks a lot more complex than it really is. Effectively we are 980 * deleting any sessions older than an admin definable limit. Due to the 981 * way in which we maintain session data we have to ensure we update user 982 * data before those sessions are destroyed. In addition this method 983 * removes autologin key information that is older than an admin defined 984 * limit. 985 */ 986 function session_gc() 987 { 988 global $db, $config, $phpbb_container, $phpbb_dispatcher; 989 990 $batch_size = 10; 991 992 if (!$this->time_now) 993 { 994 $this->time_now = time(); 995 } 996 997 // Firstly, delete guest sessions 998 $sql = 'DELETE FROM ' . SESSIONS_TABLE . ' 999 WHERE session_user_id = ' . ANONYMOUS . ' 1000 AND session_time < ' . (int) ($this->time_now - $config['session_length']); 1001 $db->sql_query($sql); 1002 1003 // Get expired sessions, only most recent for each user 1004 $sql = 'SELECT session_user_id, session_page, MAX(session_time) AS recent_time 1005 FROM ' . SESSIONS_TABLE . ' 1006 WHERE session_time < ' . ($this->time_now - $config['session_length']) . ' 1007 GROUP BY session_user_id, session_page'; 1008 $result = $db->sql_query_limit($sql, $batch_size); 1009 1010 $del_user_id = array(); 1011 $del_sessions = 0; 1012 1013 while ($row = $db->sql_fetchrow($result)) 1014 { 1015 $sql = 'UPDATE ' . USERS_TABLE . ' 1016 SET user_lastvisit = ' . (int) $row['recent_time'] . ", user_lastpage = '" . $db->sql_escape($row['session_page']) . "' 1017 WHERE user_id = " . (int) $row['session_user_id']; 1018 $db->sql_query($sql); 1019 1020 $del_user_id[] = (int) $row['session_user_id']; 1021 $del_sessions++; 1022 } 1023 $db->sql_freeresult($result); 1024 1025 if (count($del_user_id)) 1026 { 1027 // Delete expired sessions 1028 $sql = 'DELETE FROM ' . SESSIONS_TABLE . ' 1029 WHERE ' . $db->sql_in_set('session_user_id', $del_user_id) . ' 1030 AND session_time < ' . ($this->time_now - $config['session_length']); 1031 $db->sql_query($sql); 1032 } 1033 1034 if ($del_sessions < $batch_size) 1035 { 1036 // Less than 10 users, update gc timer ... else we want gc 1037 // called again to delete other sessions 1038 $config->set('session_last_gc', $this->time_now, false); 1039 1040 if ($config['max_autologin_time']) 1041 { 1042 $sql = 'DELETE FROM ' . SESSIONS_KEYS_TABLE . ' 1043 WHERE last_login < ' . (time() - (86400 * (int) $config['max_autologin_time'])); 1044 $db->sql_query($sql); 1045 } 1046 1047 // only called from CRON; should be a safe workaround until the infrastructure gets going 1048 /* @var $captcha_factory \phpbb\captcha\factory */ 1049 $captcha_factory = $phpbb_container->get('captcha.factory'); 1050 $captcha_factory->garbage_collect($config['captcha_plugin']); 1051 1052 $sql = 'DELETE FROM ' . LOGIN_ATTEMPT_TABLE . ' 1053 WHERE attempt_time < ' . (time() - (int) $config['ip_login_limit_time']); 1054 $db->sql_query($sql); 1055 } 1056 1057 /** 1058 * Event to trigger extension on session_gc 1059 * 1060 * @event core.session_gc_after 1061 * @since 3.1.6-RC1 1062 */ 1063 $phpbb_dispatcher->dispatch('core.session_gc_after'); 1064 1065 return; 1066 } 1067 1068 /** 1069 * Sets a cookie 1070 * 1071 * Sets a cookie of the given name with the specified data for the given length of time. If no time is specified, a session cookie will be set. 1072 * 1073 * @param string $name Name of the cookie, will be automatically prefixed with the phpBB cookie name. track becomes [cookie_name]_track then. 1074 * @param string $cookiedata The data to hold within the cookie 1075 * @param int $cookietime The expiration time as UNIX timestamp. If 0 is provided, a session cookie is set. 1076 * @param bool $httponly Use HttpOnly. Defaults to true. Use false to make cookie accessible by client-side scripts. 1077 */ 1078 function set_cookie($name, $cookiedata, $cookietime, $httponly = true) 1079 { 1080 global $config, $phpbb_dispatcher; 1081 1082 // If headers are already set, we just return 1083 if (headers_sent()) 1084 { 1085 return; 1086 } 1087 1088 $disable_cookie = false; 1089 /** 1090 * Event to modify or disable setting cookies 1091 * 1092 * @event core.set_cookie 1093 * @var bool disable_cookie Set to true to disable setting this cookie 1094 * @var string name Name of the cookie 1095 * @var string cookiedata The data to hold within the cookie 1096 * @var int cookietime The expiration time as UNIX timestamp 1097 * @var bool httponly Use HttpOnly? 1098 * @since 3.2.9-RC1 1099 */ 1100 $vars = array( 1101 'disable_cookie', 1102 'name', 1103 'cookiedata', 1104 'cookietime', 1105 'httponly', 1106 ); 1107 extract($phpbb_dispatcher->trigger_event('core.set_cookie', compact($vars))); 1108 1109 if ($disable_cookie) 1110 { 1111 return; 1112 } 1113 1114 $name_data = rawurlencode($config['cookie_name'] . '_' . $name) . '=' . rawurlencode($cookiedata); 1115 $expire = gmdate('D, d-M-Y H:i:s \\G\\M\\T', $cookietime); 1116 $domain = (!$config['cookie_domain'] || $config['cookie_domain'] == '127.0.0.1' || strpos($config['cookie_domain'], '.') === false) ? '' : '; domain=' . $config['cookie_domain']; 1117 1118 header('Set-Cookie: ' . $name_data . (($cookietime) ? '; expires=' . $expire : '') . '; path=' . $config['cookie_path'] . $domain . ((!$config['cookie_secure']) ? '' : '; secure') . ';' . (($httponly) ? ' HttpOnly' : ''), false); 1119 } 1120 1121 /** 1122 * Check for banned user 1123 * 1124 * Checks whether the supplied user is banned by id, ip or email. If no parameters 1125 * are passed to the method pre-existing session data is used. 1126 * 1127 * @param int|false $user_id The user id 1128 * @param mixed $user_ips Can contain a string with one IP or an array of multiple IPs 1129 * @param string|false $user_email The user email 1130 * @param bool $return If $return is false this routine does not return on finding a banned user, 1131 * it outputs a relevant message and stops execution. 1132 */ 1133 function check_ban($user_id = false, $user_ips = false, $user_email = false, $return = false) 1134 { 1135 global $config, $db, $phpbb_dispatcher; 1136 1137 if (defined('IN_CHECK_BAN') || defined('SKIP_CHECK_BAN')) 1138 { 1139 return; 1140 } 1141 1142 $banned = false; 1143 $cache_ttl = 3600; 1144 $where_sql = array(); 1145 1146 $sql = 'SELECT ban_ip, ban_userid, ban_email, ban_exclude, ban_give_reason, ban_end 1147 FROM ' . BANLIST_TABLE . ' 1148 WHERE '; 1149 1150 // Determine which entries to check, only return those 1151 if ($user_email === false) 1152 { 1153 $where_sql[] = "ban_email = ''"; 1154 } 1155 1156 if ($user_ips === false) 1157 { 1158 $where_sql[] = "(ban_ip = '' OR ban_exclude = 1)"; 1159 } 1160 1161 if ($user_id === false) 1162 { 1163 $where_sql[] = '(ban_userid = 0 OR ban_exclude = 1)'; 1164 } 1165 else 1166 { 1167 $cache_ttl = ($user_id == ANONYMOUS) ? 3600 : 0; 1168 $_sql = '(ban_userid = ' . $user_id; 1169 1170 if ($user_email !== false) 1171 { 1172 $_sql .= " OR ban_email <> ''"; 1173 } 1174 1175 if ($user_ips !== false) 1176 { 1177 $_sql .= " OR ban_ip <> ''"; 1178 } 1179 1180 $_sql .= ')'; 1181 1182 $where_sql[] = $_sql; 1183 } 1184 1185 $sql .= (count($where_sql)) ? implode(' AND ', $where_sql) : ''; 1186 $result = $db->sql_query($sql, $cache_ttl); 1187 1188 $ban_triggered_by = 'user'; 1189 while ($row = $db->sql_fetchrow($result)) 1190 { 1191 if ($row['ban_end'] && $row['ban_end'] < time()) 1192 { 1193 continue; 1194 } 1195 1196 $ip_banned = false; 1197 if (!empty($row['ban_ip'])) 1198 { 1199 if (!is_array($user_ips)) 1200 { 1201 $ip_banned = preg_match('#^' . str_replace('\*', '.*?', preg_quote($row['ban_ip'], '#')) . '$#i', $user_ips); 1202 } 1203 else 1204 { 1205 foreach ($user_ips as $user_ip) 1206 { 1207 if (preg_match('#^' . str_replace('\*', '.*?', preg_quote($row['ban_ip'], '#')) . '$#i', $user_ip)) 1208 { 1209 $ip_banned = true; 1210 break; 1211 } 1212 } 1213 } 1214 } 1215 1216 if ((!empty($row['ban_userid']) && intval($row['ban_userid']) == $user_id) || 1217 $ip_banned || 1218 (!empty($row['ban_email']) && preg_match('#^' . str_replace('\*', '.*?', preg_quote($row['ban_email'], '#')) . '$#i', $user_email))) 1219 { 1220 if (!empty($row['ban_exclude'])) 1221 { 1222 $banned = false; 1223 break; 1224 } 1225 else 1226 { 1227 $banned = true; 1228 $ban_row = $row; 1229 1230 if (!empty($row['ban_userid']) && intval($row['ban_userid']) == $user_id) 1231 { 1232 $ban_triggered_by = 'user'; 1233 } 1234 else if ($ip_banned) 1235 { 1236 $ban_triggered_by = 'ip'; 1237 } 1238 else 1239 { 1240 $ban_triggered_by = 'email'; 1241 } 1242 1243 // Don't break. Check if there is an exclude rule for this user 1244 } 1245 } 1246 } 1247 $db->sql_freeresult($result); 1248 1249 /** 1250 * Event to set custom ban type 1251 * 1252 * @event core.session_set_custom_ban 1253 * @var bool return If $return is false this routine does not return on finding a banned user, it outputs a relevant message and stops execution 1254 * @var bool banned Check if user already banned 1255 * @var array|false ban_row Ban data 1256 * @var string ban_triggered_by Method that caused ban, can be your custom method 1257 * @since 3.1.3-RC1 1258 */ 1259 $ban_row = isset($ban_row) ? $ban_row : false; 1260 $vars = array('return', 'banned', 'ban_row', 'ban_triggered_by'); 1261 extract($phpbb_dispatcher->trigger_event('core.session_set_custom_ban', compact($vars))); 1262 1263 if ($banned && !$return) 1264 { 1265 global $phpbb_root_path, $phpEx; 1266 1267 // If the session is empty we need to create a valid one... 1268 if (empty($this->session_id)) 1269 { 1270 // This seems to be no longer needed? - #14971 1271 // $this->session_create(ANONYMOUS); 1272 } 1273 1274 // Initiate environment ... since it won't be set at this stage 1275 $this->setup(); 1276 1277 // Logout the user, banned users are unable to use the normal 'logout' link 1278 if ($this->data['user_id'] != ANONYMOUS) 1279 { 1280 $this->session_kill(); 1281 } 1282 1283 // We show a login box here to allow founders accessing the board if banned by IP 1284 if (defined('IN_LOGIN') && $this->data['user_id'] == ANONYMOUS) 1285 { 1286 $this->setup('ucp'); 1287 $this->data['is_registered'] = $this->data['is_bot'] = false; 1288 1289 // Set as a precaution to allow login_box() handling this case correctly as well as this function not being executed again. 1290 define('IN_CHECK_BAN', 1); 1291 1292 login_box("index.$phpEx"); 1293 1294 // The false here is needed, else the user is able to circumvent the ban. 1295 $this->session_kill(false); 1296 } 1297 1298 // Ok, we catch the case of an empty session id for the anonymous user... 1299 // This can happen if the user is logging in, banned by username and the login_box() being called "again". 1300 if (empty($this->session_id) && defined('IN_CHECK_BAN')) 1301 { 1302 $this->session_create(ANONYMOUS); 1303 } 1304 1305 // Determine which message to output 1306 $till_date = ($ban_row['ban_end']) ? $this->format_date($ban_row['ban_end']) : ''; 1307 $message = ($ban_row['ban_end']) ? 'BOARD_BAN_TIME' : 'BOARD_BAN_PERM'; 1308 1309 $contact_link = phpbb_get_board_contact_link($config, $phpbb_root_path, $phpEx); 1310 $message = sprintf($this->lang[$message], $till_date, '<a href="' . $contact_link . '">', '</a>'); 1311 $message .= ($ban_row['ban_give_reason']) ? '<br /><br />' . sprintf($this->lang['BOARD_BAN_REASON'], $ban_row['ban_give_reason']) : ''; 1312 $message .= '<br /><br /><em>' . $this->lang['BAN_TRIGGERED_BY_' . strtoupper($ban_triggered_by)] . '</em>'; 1313 1314 // A very special case... we are within the cron script which is not supposed to print out the ban message... show blank page 1315 if (defined('IN_CRON')) 1316 { 1317 garbage_collection(); 1318 exit_handler(); 1319 exit; 1320 } 1321 1322 // To circumvent session_begin returning a valid value and the check_ban() not called on second page view, we kill the session again 1323 $this->session_kill(false); 1324 1325 trigger_error($message); 1326 } 1327 1328 if (!empty($ban_row)) 1329 { 1330 $ban_row['ban_triggered_by'] = $ban_triggered_by; 1331 } 1332 1333 return ($banned && $ban_row) ? $ban_row : $banned; 1334 } 1335 1336 /** 1337 * Check the current session for bans 1338 * 1339 * @return true if session user is banned. 1340 */ 1341 protected function check_ban_for_current_session($config) 1342 { 1343 if (!defined('SKIP_CHECK_BAN') && $this->data['user_type'] != USER_FOUNDER) 1344 { 1345 if (!$config['forwarded_for_check']) 1346 { 1347 $this->check_ban($this->data['user_id'], $this->ip); 1348 } 1349 else 1350 { 1351 $ips = explode(' ', $this->forwarded_for); 1352 $ips[] = $this->ip; 1353 $this->check_ban($this->data['user_id'], $ips); 1354 } 1355 } 1356 } 1357 1358 /** 1359 * Check if ip is blacklisted 1360 * This should be called only where absolutely necessary 1361 * 1362 * Only IPv4 (rbldns does not support AAAA records/IPv6 lookups) 1363 * 1364 * @author satmd (from the php manual) 1365 * @param string $mode register/post - spamcop for example is ommitted for posting 1366 * @param string|false $ip the IPv4 address to check 1367 * 1368 * @return false if ip is not blacklisted, else an array([checked server], [lookup]) 1369 */ 1370 function check_dnsbl($mode, $ip = false) 1371 { 1372 if ($ip === false) 1373 { 1374 $ip = $this->ip; 1375 } 1376 1377 // Neither Spamhaus nor Spamcop supports IPv6 addresses. 1378 if (strpos($ip, ':') !== false) 1379 { 1380 return false; 1381 } 1382 1383 $dnsbl_check = array( 1384 'sbl.spamhaus.org' => 'http://www.spamhaus.org/query/bl?ip=', 1385 ); 1386 1387 if ($mode == 'register') 1388 { 1389 $dnsbl_check['bl.spamcop.net'] = 'http://spamcop.net/bl.shtml?'; 1390 } 1391 1392 if ($ip) 1393 { 1394 $quads = explode('.', $ip); 1395 $reverse_ip = $quads[3] . '.' . $quads[2] . '.' . $quads[1] . '.' . $quads[0]; 1396 1397 // Need to be listed on all servers... 1398 $listed = true; 1399 $info = array(); 1400 1401 foreach ($dnsbl_check as $dnsbl => $lookup) 1402 { 1403 if (phpbb_checkdnsrr($reverse_ip . '.' . $dnsbl . '.', 'A') === true) 1404 { 1405 $info = array($dnsbl, $lookup . $ip); 1406 } 1407 else 1408 { 1409 $listed = false; 1410 } 1411 } 1412 1413 if ($listed) 1414 { 1415 return $info; 1416 } 1417 } 1418 1419 return false; 1420 } 1421 1422 /** 1423 * Check if URI is blacklisted 1424 * This should be called only where absolutly necessary, for example on the submitted website field 1425 * This function is not in use at the moment and is only included for testing purposes, it may not work at all! 1426 * This means it is untested at the moment and therefore commented out 1427 * 1428 * @param string $uri URI to check 1429 * @return true if uri is on blacklist, else false. Only blacklist is checked (~zero FP), no grey lists 1430 function check_uribl($uri) 1431 { 1432 // Normally parse_url() is not intended to parse uris 1433 // We need to get the top-level domain name anyway... change. 1434 $uri = parse_url($uri); 1435 1436 if ($uri === false || empty($uri['host'])) 1437 { 1438 return false; 1439 } 1440 1441 $uri = trim($uri['host']); 1442 1443 if ($uri) 1444 { 1445 // One problem here... the return parameter for the "windows" method is different from what 1446 // we expect... this may render this check useless... 1447 if (phpbb_checkdnsrr($uri . '.multi.uribl.com.', 'A') === true) 1448 { 1449 return true; 1450 } 1451 } 1452 1453 return false; 1454 } 1455 */ 1456 1457 /** 1458 * Set/Update a persistent login key 1459 * 1460 * This method creates or updates a persistent session key. When a user makes 1461 * use of persistent (formerly auto-) logins a key is generated and stored in the 1462 * DB. When they revisit with the same key it's automatically updated in both the 1463 * DB and cookie. Multiple keys may exist for each user representing different 1464 * browsers or locations. As with _any_ non-secure-socket no passphrase login this 1465 * remains vulnerable to exploit. 1466 */ 1467 function set_login_key($user_id = false, $key = false, $user_ip = false) 1468 { 1469 global $db; 1470 1471 $user_id = ($user_id === false) ? $this->data['user_id'] : $user_id; 1472 $user_ip = ($user_ip === false) ? $this->ip : $user_ip; 1473 $key = ($key === false) ? (($this->cookie_data['k']) ? $this->cookie_data['k'] : false) : $key; 1474 1475 $key_id = unique_id(hexdec(substr($this->session_id, 0, 8))); 1476 1477 $sql_ary = array( 1478 'key_id' => (string) md5($key_id), 1479 'last_ip' => (string) $user_ip, 1480 'last_login' => (int) time() 1481 ); 1482 1483 if (!$key) 1484 { 1485 $sql_ary += array( 1486 'user_id' => (int) $user_id 1487 ); 1488 } 1489 1490 if ($key) 1491 { 1492 $sql = 'UPDATE ' . SESSIONS_KEYS_TABLE . ' 1493 SET ' . $db->sql_build_array('UPDATE', $sql_ary) . ' 1494 WHERE user_id = ' . (int) $user_id . " 1495 AND key_id = '" . $db->sql_escape(md5($key)) . "'"; 1496 } 1497 else 1498 { 1499 $sql = 'INSERT INTO ' . SESSIONS_KEYS_TABLE . ' ' . $db->sql_build_array('INSERT', $sql_ary); 1500 } 1501 $db->sql_query($sql); 1502 1503 $this->cookie_data['k'] = $key_id; 1504 1505 return false; 1506 } 1507 1508 /** 1509 * Reset all login keys for the specified user 1510 * 1511 * This method removes all current login keys for a specified (or the current) 1512 * user. It will be called on password change to render old keys unusable 1513 */ 1514 function reset_login_keys($user_id = false) 1515 { 1516 global $db; 1517 1518 $user_id = ($user_id === false) ? (int) $this->data['user_id'] : (int) $user_id; 1519 1520 $sql = 'DELETE FROM ' . SESSIONS_KEYS_TABLE . ' 1521 WHERE user_id = ' . (int) $user_id; 1522 $db->sql_query($sql); 1523 1524 // If the user is logged in, update last visit info first before deleting sessions 1525 $sql = 'SELECT session_time, session_page 1526 FROM ' . SESSIONS_TABLE . ' 1527 WHERE session_user_id = ' . (int) $user_id . ' 1528 ORDER BY session_time DESC'; 1529 $result = $db->sql_query_limit($sql, 1); 1530 $row = $db->sql_fetchrow($result); 1531 $db->sql_freeresult($result); 1532 1533 if ($row) 1534 { 1535 $sql = 'UPDATE ' . USERS_TABLE . ' 1536 SET user_lastvisit = ' . (int) $row['session_time'] . ", user_lastpage = '" . $db->sql_escape($row['session_page']) . "' 1537 WHERE user_id = " . (int) $user_id; 1538 $db->sql_query($sql); 1539 } 1540 1541 // Let's also clear any current sessions for the specified user_id 1542 // If it's the current user then we'll leave this session intact 1543 $sql_where = 'session_user_id = ' . (int) $user_id; 1544 $sql_where .= ($user_id === (int) $this->data['user_id']) ? " AND session_id <> '" . $db->sql_escape($this->session_id) . "'" : ''; 1545 1546 $sql = 'DELETE FROM ' . SESSIONS_TABLE . " 1547 WHERE $sql_where"; 1548 $db->sql_query($sql); 1549 1550 // We're changing the password of the current user and they have a key 1551 // Lets regenerate it to be safe 1552 if ($user_id === (int) $this->data['user_id'] && $this->cookie_data['k']) 1553 { 1554 $this->set_login_key($user_id); 1555 } 1556 } 1557 1558 1559 /** 1560 * Check if the request originated from the same page. 1561 * @param bool $check_script_path If true, the path will be checked as well 1562 */ 1563 function validate_referer($check_script_path = false) 1564 { 1565 global $config, $request; 1566 1567 // no referer - nothing to validate, user's fault for turning it off (we only check on POST; so meta can't be the reason) 1568 if (empty($this->referer) || empty($this->host)) 1569 { 1570 return true; 1571 } 1572 1573 $host = htmlspecialchars($this->host); 1574 $ref = substr($this->referer, strpos($this->referer, '://') + 3); 1575 1576 if (!(stripos($ref, $host) === 0) && (!$config['force_server_vars'] || !(stripos($ref, $config['server_name']) === 0))) 1577 { 1578 return false; 1579 } 1580 else if ($check_script_path && rtrim($this->page['root_script_path'], '/') !== '') 1581 { 1582 $ref = substr($ref, strlen($host)); 1583 $server_port = $request->server('SERVER_PORT', 0); 1584 1585 if ($server_port !== 80 && $server_port !== 443 && stripos($ref, ":$server_port") === 0) 1586 { 1587 $ref = substr($ref, strlen(":$server_port")); 1588 } 1589 1590 if (!(stripos(rtrim($ref, '/'), rtrim($this->page['root_script_path'], '/')) === 0)) 1591 { 1592 return false; 1593 } 1594 } 1595 1596 return true; 1597 } 1598 1599 1600 function unset_admin() 1601 { 1602 global $db; 1603 $sql = 'UPDATE ' . SESSIONS_TABLE . ' 1604 SET session_admin = 0 1605 WHERE session_id = \'' . $db->sql_escape($this->session_id) . '\''; 1606 $db->sql_query($sql); 1607 } 1608 1609 /** 1610 * Update the session data 1611 * 1612 * @param array $session_data associative array of session keys to be updated 1613 * @param string $session_id optional session_id, defaults to current user's session_id 1614 */ 1615 public function update_session($session_data, $session_id = null) 1616 { 1617 global $db, $phpbb_dispatcher; 1618 1619 $session_id = ($session_id) ? $session_id : $this->session_id; 1620 1621 $sql = 'UPDATE ' . SESSIONS_TABLE . ' SET ' . $db->sql_build_array('UPDATE', $session_data) . " 1622 WHERE session_id = '" . $db->sql_escape($session_id) . "'"; 1623 $db->sql_query($sql); 1624 1625 /** 1626 * Event to send update session information to extension 1627 * Read-only event 1628 * 1629 * @event core.update_session_after 1630 * @var array session_data Associative array of session keys to be updated 1631 * @var string session_id current user's session_id 1632 * @since 3.1.6-RC1 1633 */ 1634 $vars = array('session_data', 'session_id'); 1635 extract($phpbb_dispatcher->trigger_event('core.update_session_after', compact($vars))); 1636 } 1637 1638 public function update_session_infos() 1639 { 1640 global $config, $db, $request; 1641 1642 // No need to update if it's a new session. Informations are already inserted by session_create() 1643 if (isset($this->data['session_created']) && $this->data['session_created']) 1644 { 1645 return; 1646 } 1647 1648 // Do not update the session page for ajax requests, so the view online still works as intended 1649 $page_changed = $this->update_session_page && $this->data['session_page'] != $this->page['page'] && !$request->is_ajax(); 1650 1651 // Only update session DB a minute or so after last update or if page changes 1652 if ($this->time_now - (isset($this->data['session_time']) ? $this->data['session_time'] : 0) > 60 || $page_changed) 1653 { 1654 $sql_ary = array('session_time' => $this->time_now); 1655 1656 if ($page_changed) 1657 { 1658 $sql_ary['session_page'] = substr($this->page['page'], 0, 199); 1659 $sql_ary['session_forum_id'] = $this->page['forum']; 1660 } 1661 1662 $db->sql_return_on_error(true); 1663 1664 $this->update_session($sql_ary); 1665 1666 $db->sql_return_on_error(false); 1667 1668 $this->data = array_merge($this->data, $sql_ary); 1669 1670 if ($this->data['user_id'] != ANONYMOUS && isset($config['new_member_post_limit']) && $this->data['user_new'] && $config['new_member_post_limit'] <= $this->data['user_posts']) 1671 { 1672 $this->leave_newly_registered(); 1673 } 1674 } 1675 } 1676 }
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| Generated: Wed Nov 11 20:33:01 2020 | Cross-referenced by PHPXref 0.7.1 |