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74 // If this session is obsolete it means there already is a new id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($path_to_root . "/includes/errors.inc");
373 // colect all error msgs
374 set_error_handler('error_handler' /*, errtypes */);
375 set_exception_handler('exception_handler');
377 include_once($path_to_root . "/includes/current_user.inc");
378 include_once($path_to_root . "/frontaccounting.php");
379 include_once($path_to_root . "/admin/db/security_db.inc");
380 include_once($path_to_root . "/includes/lang/language.inc");
381 include_once($path_to_root . "/config_db.php");
382 include_once($path_to_root . "/includes/ajax.inc");
383 include_once($path_to_root . "/includes/ui/ui_msgs.inc");
384 include_once($path_to_root . "/includes/prefs/sysprefs.inc");
386 include_once($path_to_root . "/includes/hooks.inc");
388 // include all extensions hook files.
390 foreach ($installed_extensions as $ext)
392 if (file_exists($path_to_root.'/'.$ext['path'].'/hooks.php'))
393 include_once($path_to_root.'/'.$ext['path'].'/hooks.php');
395 $Session_manager = new SessionManager();
396 $Session_manager->sessionStart('FA'.md5(dirname(__FILE__)));
398 $_SESSION['SysPrefs'] = new sys_prefs();
400 $SysPrefs = &$_SESSION['SysPrefs'];
402 //----------------------------------------------------------------------------------------
403 // set to reasonable values if not set in config file (pre-2.3.12 installations)
405 if ((!isset($SysPrefs->login_delay)) || ($SysPrefs->login_delay < 0))
406 $SysPrefs->login_delay = 10;
408 if ((!isset($SysPrefs->login_max_attempts)) || ($SysPrefs->login_max_attempts < 0))
409 $SysPrefs->login_max_attempts = 3;
411 if ($SysPrefs->go_debug > 0)
414 error_reporting(E_USER_WARNING|E_USER_ERROR|E_USER_NOTICE);
415 ini_set("display_errors", "On");
417 if ($SysPrefs->error_logfile != '') {
418 ini_set("error_log", $SysPrefs->error_logfile);
419 ini_set("ignore_repeated_errors", "On");
420 ini_set("log_errors", "On");
424 Uncomment the setting below when using FA on shared hosting
425 to avoid unexpeced session timeouts.
426 Make sure this directory exists and is writable!
428 // ini_set('session.save_path', dirname(__FILE__).'/../tmp/');
430 ini_set('session.gc_maxlifetime', 36000); // 10hrs
432 hook_session_start(@$_POST["company_login_name"]);
434 // this is to fix the "back-do-you-want-to-refresh" issue - thanx PHPFreaks
435 header("Cache-control: private");
439 if ($SysPrefs->login_delay > 0 && file_exists($path_to_root . "/tmp/faillog.php"))
440 include_once($path_to_root . "/tmp/faillog.php");
442 // Page Initialisation
443 if (!isset($_SESSION['wa_current_user']) || !$_SESSION['wa_current_user']->logged_in()
444 || !isset($_SESSION['language']) || !method_exists($_SESSION['language'], 'set_language'))
446 $l = array_search_value($dflt_lang, $installed_languages, 'code');
447 $_SESSION['language'] = new language($l['name'], $l['code'], $l['encoding'],
448 (isset($l['rtl']) && $l['rtl'] === true) ? 'rtl' : 'ltr');
451 $_SESSION['language']->set_language($_SESSION['language']->code);
454 include_once($path_to_root . "/includes/access_levels.inc");
455 include_once($path_to_root . "/version.php");
456 include_once($path_to_root . "/includes/main.inc");
457 include_once($path_to_root . "/includes/app_entries.inc");
459 // Ajax communication object
462 // js/php validation rules container
464 // bindings for editors
466 // page help. Currently help for function keys.
469 $Refs = new references();
471 // intercept all output to destroy it in case of ajax call
472 register_shutdown_function('end_flush');
473 ob_start('output_html',0);
475 if (!isset($_SESSION["wa_current_user"]))
476 $_SESSION["wa_current_user"] = new current_user();
479 html_cleanup($_POST);
480 html_cleanup($_REQUEST);
481 html_cleanup($_SERVER);
483 // logout.php is the only page we should have always
484 // accessable regardless of access level and current login status.
485 if (!defined('FA_LOGOUT_PHP_FILE')){
489 if (!$_SESSION["wa_current_user"]->old_db && file_exists($path_to_root . '/company/'.user_company().'/installed_extensions.php'))
490 include($path_to_root . '/company/'.user_company().'/installed_extensions.php');
494 if (!$_SESSION["wa_current_user"]->logged_in())
496 if (@$SysPrefs->allow_password_reset && !$SysPrefs->allow_demo_mode
497 && (isset($_GET['reset']) || isset($_POST['email_entry_field']))) {
498 if (!isset($_POST["email_entry_field"])) {
499 include($path_to_root . "/access/password_reset.php");
503 if (isset($_POST["company_login_nickname"]) && !isset($_POST["company_login_name"])) {
504 for ($i = 0; $i < count($db_connections); $i++) {
505 if ($db_connections[$i]["name"] == $_POST["company_login_nickname"]) {
506 $_POST["company_login_name"] = $i;
507 unset($_POST["company_login_nickname"]);
508 break 1; // cannot pass variables to break from PHP v5.4 onwards
512 $_succeed = isset($db_connections[$_POST["company_login_name"]]) &&
513 $_SESSION["wa_current_user"]->reset_password($_POST["company_login_name"],
514 $_POST["email_entry_field"]);
517 password_reset_success();
520 password_reset_fail();
524 if (!isset($_POST["user_name_entry_field"]) or $_POST["user_name_entry_field"] == "")
526 // strip ajax marker from uri, to force synchronous page reload
527 $_SESSION['timeout'] = array( 'uri'=>preg_replace('/JsHttpRequest=(?:(\d+)-)?([^&]+)/s',
528 '', html_specials_encode($_SERVER['REQUEST_URI'])),
531 include($path_to_root . "/access/login.php");
533 $Ajax->activate('_page_body');
536 if (isset($_POST["company_login_nickname"]) && !isset($_POST["company_login_name"])) {
537 for ($i = 0; $i < count($db_connections); $i++) {
538 if ($db_connections[$i]["name"] == $_POST["company_login_nickname"]) {
539 $_POST["company_login_name"] = $i;
540 unset($_POST["company_login_nickname"]);
541 break 1; // cannot pass variables to break from PHP v5.4 onwards
545 $succeed = isset($db_connections[$_POST["company_login_name"]]) &&
546 $_SESSION["wa_current_user"]->login($_POST["company_login_name"],
547 $_POST["user_name_entry_field"], $_POST["password"]);
548 // select full vs fallback ui mode on login
549 $_SESSION["wa_current_user"]->ui_mode = $_POST['ui_mode'];
552 // Incorrect password
555 elseif(isset($_SESSION['timeout']) && !$_SESSION['timeout']['post'])
557 // in case of GET request redirect to avoid confirmation dialog
558 // after return from menu option
559 header("HTTP/1.1 303 See Other");
560 header("Location: ".$_SESSION['timeout']['uri']);
563 $lang = &$_SESSION['language'];
564 $lang->set_language($_SESSION['language']->code);
568 set_global_connection();
571 db_set_encoding($_SESSION['language']->encoding);
573 $SysPrefs->refresh();
575 if (!isset($_SESSION["App"])) {
576 $_SESSION["App"] = new front_accounting();
577 $_SESSION["App"]->init();
581 // POST vars cleanup needed for direct reuse.
582 // We quote all values later with db_escape() before db update.
583 $_POST = strip_quotes($_POST);