2 /**********************************************************************
3 Copyright (C) FrontAccounting, LLC.
4 Released under the terms of the GNU General Public License, GPL,
5 as published by the Free Software Foundation, either version 3
6 of the License, or (at your option) any later version.
7 This program is distributed in the hope that it will be useful,
8 but WITHOUT ANY WARRANTY; without even the implied warranty of
9 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
10 See the License here <http://www.gnu.org/licenses/gpl-3.0.html>.
11 ***********************************************************************/
15 function sessionStart($name, $limit = 0, $path = '/', $domain = null, $secure = null)
17 // Set the cookie name
21 $https = isset($secure) ? $secure : (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off');
23 // Set session cookie options
24 if (version_compare(PHP_VERSION, '5.2', '<')) // avoid failure on older php versions
25 session_set_cookie_params($limit, $path, $domain, $https);
27 session_set_cookie_params($limit, $path, $domain, $https, true);
31 // Make sure the session hasn't expired, and destroy it if it has
32 if ($this->validateSession())
34 // Check to see if the session is new or a hijacking attempt
35 if(!$this->preventHijacking())
37 // Reset session data and regenerate id
39 $_SESSION['IPaddress'] = $_SERVER['REMOTE_ADDR'];
40 $_SESSION['userAgent'] = @$_SERVER['HTTP_USER_AGENT'];
41 $this->regenerateSession();
43 // Give a 5% chance of the session id changing on any request
45 elseif (rand(1, 100) <= 5)
47 $this->regenerateSession();
58 function preventHijacking()
60 if (!isset($_SESSION['IPaddress']) || !isset($_SESSION['userAgent']))
63 if ($_SESSION['IPaddress'] != $_SERVER['REMOTE_ADDR'])
66 if ( $_SESSION['userAgent'] != @$_SERVER['HTTP_USER_AGENT'])
72 function regenerateSession()
74 // If this session is obsolete it means there already is a new id
75 if (isset($_SESSION['OBSOLETE']) && ($_SESSION['OBSOLETE'] == true))
78 // Set current session to expire in 10 seconds
79 $_SESSION['OBSOLETE'] = true;
80 $_SESSION['EXPIRES'] = time() + 10;
82 // Create new session without destroying the old one
83 session_regenerate_id();
84 // Grab current session ID and close both sessions to allow other scripts to use them
85 $newSession = session_id();
86 session_write_close();
87 // Set session ID to the new one, and start it back up again
89 session_id($newSession);
92 // Now we unset the obsolete and expiration values for the session we want to keep
93 unset($_SESSION['OBSOLETE']);
94 unset($_SESSION['EXPIRES']);
97 function validateSession()
99 if (isset($_SESSION['OBSOLETE']) && !isset($_SESSION['EXPIRES']) )
102 if (isset($_SESSION['EXPIRES']) && $_SESSION['EXPIRES'] < time())
109 function output_html($text)
111 global $before_box, $Ajax, $messages;
112 // Fatal errors are not send to error_handler,
113 // so we must check the output
114 if ($text && preg_match('/\bFatal error(<.*?>)?:(.*)/i', $text, $m)) {
115 $Ajax->aCommands = array(); // Don't update page via ajax on errors
116 $text = preg_replace('/\bFatal error(<.*?>)?:(.*)/i','', $text);
117 $messages[] = array(E_ERROR, $m[2], null, null);
120 return in_ajax() ? fmt_errors() : ($before_box.fmt_errors().$text);
122 //----------------------------------------------------------------------------------------
124 function kill_login()
129 //----------------------------------------------------------------------------------------
131 function login_fail()
133 global $path_to_root;
135 header("HTTP/1.1 401 Authorization Required");
136 echo "<center><br><br><font size='5' color='red'><b>" . _("Incorrect Password") . "<b></font><br><br>";
137 echo "<b>" . _("The user and password combination is not valid for the system.") . "<b><br><br>";
139 echo _("If you are not an authorized user, please contact your system administrator to obtain an account to enable you to use the system.");
140 echo "<br><a href='$path_to_root/index.php'>" . _("Try again") . "</a>";
147 function password_reset_fail()
149 global $path_to_root;
151 echo "<center><br><br><font size='5' color='red'><b>" . _("Incorrect Email") . "<b></font><br><br>";
152 echo "<b>" . _("The email address does not exist in the system, or is used by more than one user.") . "<b><br><br>";
154 echo _("Plase try again or contact your system administrator to obtain new password.");
155 echo "<br><a href='$path_to_root/index.php?reset=1'>" . _("Try again") . "</a>";
162 function password_reset_success()
164 global $path_to_root;
166 echo "<center><br><br><font size='5' color='green'><b>" . _("New password sent") . "<b></font><br><br>";
167 echo "<b>" . _("A new password has been sent to your mailbox.") . "<b><br><br>";
169 echo "<br><a href='$path_to_root/index.php'>" . _("Login here") . "</a>";
176 function check_faillog()
178 global $SysPrefs, $login_faillog;
180 $user = $_SESSION["wa_current_user"]->user;
182 if (@$SysPrefs->login_delay && (@$login_faillog[$user][$_SERVER['REMOTE_ADDR']] >= @$SysPrefs->login_max_attempts) && (time() < $login_faillog[$user]['last'] + $SysPrefs->login_delay))
189 Ensure file is re-read on next request if php caching is active
191 function cache_invalidate($filename)
193 if (function_exists('opcache_invalidate')) // OpCode extension
194 opcache_invalidate($filename);
198 Simple brute force attack detection is performed before connection to company database is open. Therefore access counters have to be stored in file.
199 Login attempts counter is created for every new user IP, which partialy prevent DOS attacks.
201 function write_login_filelog($login, $result)
203 global $login_faillog, $SysPrefs, $path_to_root;
205 $user = $_SESSION["wa_current_user"]->user;
207 $ip = $_SERVER['REMOTE_ADDR'];
209 if (!isset($login_faillog[$user][$ip]) || $result) // init or reset on successfull login
210 $login_faillog[$user] = array($ip => 0, 'last' => '');
214 if ($login_faillog[$user][$ip] < @$SysPrefs->login_max_attempts) {
216 $login_faillog[$user][$ip]++;
218 $login_faillog[$user][$ip] = 0; // comment out to restart counter only after successfull login.
219 error_log(sprintf(_("Brute force attack on account '%s' detected. Access for non-logged users temporarily blocked." ), $login));
221 $login_faillog[$user]['last'] = time();
226 $msg .= "Login attempts info.\n";
228 $msg .= "\$login_faillog = " .var_export($login_faillog, true). ";\n";
230 $filename = $path_to_root."/tmp/faillog.php";
232 if ((!file_exists($filename) && is_writable($path_to_root.'/tmp')) || is_writable($filename))
234 file_put_contents($filename, $msg);
235 cache_invalidate($filename);
239 //----------------------------------------------------------------------------------------
241 function check_page_security($page_security)
247 if (!$_SESSION["wa_current_user"]->check_user_access())
249 // notification after upgrade from pre-2.2 version
250 $msg = $_SESSION["wa_current_user"]->old_db ?
251 _("Security settings have not been defined for your user account.")
252 . "<br>" . _("Please contact your system administrator.")
253 : _("Please remove \$security_groups and \$security_headings arrays from config.php file!");
254 } elseif (!$SysPrefs->db_ok && !$_SESSION["wa_current_user"]->can_access('SA_SOFTWAREUPGRADE'))
256 $msg = _('Access to application has been blocked until database upgrade is completed by system administrator.');
261 end_page(@$_REQUEST['popup']);
266 if (!$_SESSION["wa_current_user"]->can_access_page($page_security))
269 echo "<center><br><br><br><b>";
270 echo _("The security settings on your account do not permit you to access this function");
272 echo "<br><br><br><br></center>";
273 end_page(@$_REQUEST['popup']);
276 if (!$SysPrefs->db_ok
277 && !in_array($page_security, array('SA_SOFTWAREUPGRADE', 'SA_OPEN', 'SA_BACKUP')))
279 display_error(_('System is blocked after source upgrade until database is updated on System/Software Upgrade page'));
286 Helper function for setting page security level depeding on
287 GET start variable and/or some value stored in session variable.
288 Before the call $page_security should be set to default page_security value.
290 function set_page_security($value=null, $trans = array(), $gtrans = array())
292 global $page_security;
294 // first check is this is not start page call
295 foreach($gtrans as $key => $area)
296 if (isset($_GET[$key])) {
297 $page_security = $area;
301 // then check session value
302 if (isset($trans[$value])) {
303 $page_security = $trans[$value];
308 //-----------------------------------------------------------------------------
309 // Removing magic quotes from nested arrays/variables
311 function strip_quotes($data)
313 if(get_magic_quotes_gpc()) {
314 if(is_array($data)) {
315 foreach($data as $k => $v) {
316 $data[$k] = strip_quotes($data[$k]);
319 return stripslashes($data);
325 htmlspecialchars does not support certain encodings.
326 ISO-8859-2 fortunately has the same special characters positions as
327 ISO-8859-1, so fix is easy. If any other unsupported encoding is used,
330 function html_specials_encode($str)
332 return htmlspecialchars($str, ENT_QUOTES, $_SESSION['language']->encoding=='iso-8859-2' ?
333 'ISO-8859-1' : $_SESSION['language']->encoding);
336 function html_cleanup(&$parms)
338 foreach($parms as $name => $value) {
339 if (is_array($value))
340 html_cleanup($parms[$name]);
342 $parms[$name] = html_specials_encode($value);
344 reset($parms); // needed for direct key() usage later throughout the sources
347 //============================================================================
350 function login_timeout()
352 // skip timeout on logout page
353 if ($_SESSION["wa_current_user"]->logged) {
354 $tout = $_SESSION["wa_current_user"]->timeout;
355 if ($tout && (time() > $_SESSION["wa_current_user"]->last_act + $tout))
357 $_SESSION["wa_current_user"]->logged = false;
359 $_SESSION["wa_current_user"]->last_act = time();
362 //============================================================================
363 if (!isset($path_to_root))
368 // Prevent register_globals vulnerability
369 if (isset($_GET['path_to_root']) || isset($_POST['path_to_root']))
370 die("Restricted access");
372 include_once($path_to_root . "/includes/errors.inc");
373 // colect all error msgs
374 set_error_handler('error_handler' /*, errtypes */);
376 include_once($path_to_root . "/includes/current_user.inc");
377 include_once($path_to_root . "/frontaccounting.php");
378 include_once($path_to_root . "/admin/db/security_db.inc");
379 include_once($path_to_root . "/includes/lang/language.inc");
380 include_once($path_to_root . "/config_db.php");
381 include_once($path_to_root . "/includes/ajax.inc");
382 include_once($path_to_root . "/includes/ui/ui_msgs.inc");
383 include_once($path_to_root . "/includes/prefs/sysprefs.inc");
385 include_once($path_to_root . "/includes/hooks.inc");
387 // include all extensions hook files.
389 foreach ($installed_extensions as $ext)
391 if (file_exists($path_to_root.'/'.$ext['path'].'/hooks.php'))
392 include_once($path_to_root.'/'.$ext['path'].'/hooks.php');
394 $Session_manager = new SessionManager();
395 $Session_manager->sessionStart('FA'.md5(dirname(__FILE__)));
397 $_SESSION['SysPrefs'] = new sys_prefs();
399 $SysPrefs = &$_SESSION['SysPrefs'];
401 //----------------------------------------------------------------------------------------
402 // set to reasonable values if not set in config file (pre-2.3.12 installations)
404 if ((!isset($SysPrefs->login_delay)) || ($SysPrefs->login_delay < 0))
405 $SysPrefs->login_delay = 10;
407 if ((!isset($SysPrefs->login_max_attempts)) || ($SysPrefs->login_max_attempts < 0))
408 $SysPrefs->login_max_attempts = 3;
410 if ($SysPrefs->go_debug > 0)
413 error_reporting(E_USER_WARNING|E_USER_ERROR|E_USER_NOTICE);
414 ini_set("display_errors", "On");
416 if ($SysPrefs->error_logfile != '') {
417 ini_set("error_log", $SysPrefs->error_logfile);
418 ini_set("ignore_repeated_errors", "On");
419 ini_set("log_errors", "On");
423 Uncomment the setting below when using FA on shared hosting
424 to avoid unexpeced session timeouts.
425 Make sure this directory exists and is writable!
427 // ini_set('session.save_path', dirname(__FILE__).'/../tmp/');
429 ini_set('session.gc_maxlifetime', 36000); // 10hrs
431 hook_session_start(@$_POST["company_login_name"]);
433 // this is to fix the "back-do-you-want-to-refresh" issue - thanx PHPFreaks
434 header("Cache-control: private");
438 if ($SysPrefs->login_delay > 0)
439 @include_once($path_to_root . "/tmp/faillog.php");
441 // Page Initialisation
442 if (!isset($_SESSION['wa_current_user']) || !$_SESSION['wa_current_user']->logged_in()
443 || !isset($_SESSION['language']) || !method_exists($_SESSION['language'], 'set_language'))
445 $l = array_search_value($dflt_lang, $installed_languages, 'code');
446 $_SESSION['language'] = new language($l['name'], $l['code'], $l['encoding'],
447 (isset($l['rtl']) && $l['rtl'] === true) ? 'rtl' : 'ltr');
450 $_SESSION['language']->set_language($_SESSION['language']->code);
453 include_once($path_to_root . "/includes/access_levels.inc");
454 include_once($path_to_root . "/version.php");
455 include_once($path_to_root . "/includes/main.inc");
456 include_once($path_to_root . "/includes/app_entries.inc");
458 // Ajax communication object
461 // js/php validation rules container
463 // bindings for editors
465 // page help. Currently help for function keys.
468 $Refs = new references();
470 // intercept all output to destroy it in case of ajax call
471 register_shutdown_function('end_flush');
472 ob_start('output_html',0);
474 if (!isset($_SESSION["wa_current_user"]))
475 $_SESSION["wa_current_user"] = new current_user();
478 html_cleanup($_POST);
479 html_cleanup($_REQUEST);
480 html_cleanup($_SERVER);
482 // logout.php is the only page we should have always
483 // accessable regardless of access level and current login status.
484 if (!defined('FA_LOGOUT_PHP_FILE')){
488 if (!$_SESSION["wa_current_user"]->old_db)
489 include($path_to_root . '/company/'.user_company().'/installed_extensions.php');
493 if (!$_SESSION["wa_current_user"]->logged_in())
495 if (@$SysPrefs->allow_password_reset && !$SysPrefs->allow_demo_mode
496 && (isset($_GET['reset']) || isset($_POST['email_entry_field']))) {
497 if (!isset($_POST["email_entry_field"])) {
498 include($path_to_root . "/access/password_reset.php");
502 if (isset($_POST["company_login_nickname"]) && !isset($_POST["company_login_name"])) {
503 for ($i = 0; $i < count($db_connections); $i++) {
504 if ($db_connections[$i]["name"] == $_POST["company_login_nickname"]) {
505 $_POST["company_login_name"] = $i;
506 unset($_POST["company_login_nickname"]);
507 break 1; // cannot pass variables to break from PHP v5.4 onwards
511 $_succeed = isset($db_connections[$_POST["company_login_name"]]) &&
512 $_SESSION["wa_current_user"]->reset_password($_POST["company_login_name"],
513 $_POST["email_entry_field"]);
516 password_reset_success();
519 password_reset_fail();
523 if (!isset($_POST["user_name_entry_field"]) or $_POST["user_name_entry_field"] == "")
525 // strip ajax marker from uri, to force synchronous page reload
526 $_SESSION['timeout'] = array( 'uri'=>preg_replace('/JsHttpRequest=(?:(\d+)-)?([^&]+)/s',
527 '', html_specials_encode($_SERVER['REQUEST_URI'])),
530 include($path_to_root . "/access/login.php");
532 $Ajax->activate('_page_body');
535 if (isset($_POST["company_login_nickname"]) && !isset($_POST["company_login_name"])) {
536 for ($i = 0; $i < count($db_connections); $i++) {
537 if ($db_connections[$i]["name"] == $_POST["company_login_nickname"]) {
538 $_POST["company_login_name"] = $i;
539 unset($_POST["company_login_nickname"]);
540 break 1; // cannot pass variables to break from PHP v5.4 onwards
544 $succeed = isset($db_connections[$_POST["company_login_name"]]) &&
545 $_SESSION["wa_current_user"]->login($_POST["company_login_name"],
546 $_POST["user_name_entry_field"], $_POST["password"]);
547 // select full vs fallback ui mode on login
548 $_SESSION["wa_current_user"]->ui_mode = $_POST['ui_mode'];
551 // Incorrect password
554 elseif(isset($_SESSION['timeout']) && !$_SESSION['timeout']['post'])
556 // in case of GET request redirect to avoid confirmation dialog
557 // after return from menu option
558 header("HTTP/1.1 303 See Other");
559 header("Location: ".$_SESSION['timeout']['uri']);
562 $lang = &$_SESSION['language'];
563 $lang->set_language($_SESSION['language']->code);
567 set_global_connection();
570 db_set_encoding($_SESSION['language']->encoding);
572 $SysPrefs->refresh();
574 if (!isset($_SESSION["App"])) {
575 $_SESSION["App"] = new front_accounting();
576 $_SESSION["App"]->init();
580 // POST vars cleanup needed for direct reuse.
581 // We quote all values later with db_escape() before db update.
582 $_POST = strip_quotes($_POST);