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source: branches/2.2/phpgwapi/inc/class.sessions.inc.php @ 3430

Revision 3430, 42.1 KB checked in by eduardoalex, 13 years ago (diff)
Ticket #1202 - Máximo de 2 ips por registro na tabela de access log.
Property svn:eol-style set to `native` Property svn:executable set to ``*

Line
1	<?php
2	/**************************************************************************\
3	* eGroupWare API - Session management *
4	* This file written by Dan Kuykendall <seek3r@phpgroupware.org> *
5	* and Joseph Engo <jengo@phpgroupware.org> *
6	* and Ralf Becker <ralfbecker@outdoor-training.de> *
7	* Copyright (C) 2000, 2001 Dan Kuykendall *
8	* Parts Copyright (C) 2003 Free Software Foundation Inc *
9	* -------------------------------------------------------------------------*
10	* This library is part of the eGroupWare API *
11	* http://www.egroupware.org/api *
12	* ------------------------------------------------------------------------ *
13	* This library is free software; you can redistribute it and/or modify it *
14	* under the terms of the GNU Lesser General Public License as published by *
15	* the Free Software Foundation; either version 2.1 of the License, *
16	* or any later version. *
17	* This library is distributed in the hope that it will be useful, but *
18	* WITHOUT ANY WARRANTY; without even the implied warranty of *
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *
20	* See the GNU Lesser General Public License for more details. *
21	* You should have received a copy of the GNU Lesser General Public License *
22	* along with this library; if not, write to the Free Software Foundation, *
23	* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
24	\**************************************************************************/
25
26
27	/* sessions_type setup moved after the class below - milosch */
28
29	/**
30	* Session Management Libabray
31	*
32	* This allows eGroupWare to use php4 or database sessions
33	*
34	* @package phpgwapi
35	* @subpackage sessions
36	* @abstract
37	* @author NetUSE AG Boris Erdmann, Kristian Koehntopp <br> hacked on by phpGW
38	* @copyright © 1998-2000 NetUSE AG Boris Erdmann, Kristian Koehntopp <br> © 2003 FreeSoftware Foundation
39	* @license LGPL
40	* @link http://www.sanisoft.com/phplib/manual/DB_sql.php
41	* @uses db
42	*/
43
44	class sessions_
45	{
46	/**
47	* @var string current user login
48	*/
49	var $login;
50
51	/**
52	* @var string current user password
53	*/
54	var $passwd;
55
56	/**
57	* @var int current user db/ldap account id
58	*/
59	var $account_id;
60
61	/**
62	* @var string current user account login id - ie user@domain
63	*/
64	var $account_lid;
65
66	/**
67	* @var string previous page call id - repost prevention
68	*/
69	var $history_id;
70
71	/**
72	* @var string domain for current user
73	*/
74	var $account_domain;
75
76	/**
77	* @var session type flag, A - anonymous session, N - None, normal session
78	*/
79	var $session_flags;
80
81	/**
82	* @var string current user session id
83	*/
84	var $sessionid;
85
86	/**
87	* @var string not sure what this does, but it is important :)
88	*/
89	var $kp3;
90
91	/**
92	* @var string encryption key?
93	*/
94	var $key;
95
96	/**
97	* @var string iv == ivegotnoidea ;) (skwashd)
98	*/
99	var $iv;
100
101	/**
102	* @var session data
103	*/
104	var $data;
105
106	/**
107	* @var object holder for the database object
108	*/
109	var $db;
110
111	/**
112	* @var array publicly available methods
113	*/
114	var $public_functions = array(
115	'list_methods' => True,
116	'update_dla' => True,
117	'list' => True,
118	'total' => True
119	);
120
121	/**
122	* @var string domain for cookies
123	*/
124	var $cookie_domain;
125
126	/**
127	* @var name of XML-RPC/SOAP method called
128	*/
129	var $xmlrpc_method_called;
130
131	/**
132	* Constructor just loads up some defaults from cookies
133	*/
134	function sessions_()
135	{
136	$this->db = $GLOBALS['phpgw']->db;
137	$this->sessionid = get_var('sessionid',array('GET','COOKIE'));
138	$this->kp3 = get_var('kp3',array('GET','COOKIE'));
139	/* Create the crypto object */
140	$GLOBALS['phpgw']->crypto = CreateObject('phpgwapi.crypto');
141	if ($GLOBALS['phpgw_info']['server']['usecookies'])
142	{
143	$this->phpgw_set_cookiedomain();
144	}
145	// verfiy and if necessary create and save our config settings
146	//
147	$save_rep = False;
148	if (!isset($GLOBALS['phpgw_info']['server']['max_access_log_age']))
149	{
150	$GLOBALS['phpgw_info']['server']['max_access_log_age'] = 90; // default 90 days
151	$save_rep = True;
152	}
153	if (!isset($GLOBALS['phpgw_info']['server']['block_time']))
154	{
155	$GLOBALS['phpgw_info']['server']['block_time'] = 30; // default 30min
156	$save_rep = True;
157	}
158	if (!isset($GLOBALS['phpgw_info']['server']['num_unsuccessful_id']))
159	{
160	$GLOBALS['phpgw_info']['server']['num_unsuccessful_id'] = 3; // default 3 trys per id
161	$save_rep = True;
162	}
163	if (!isset($GLOBALS['phpgw_info']['server']['num_unsuccessful_ip']))
164	{
165	$GLOBALS['phpgw_info']['server']['num_unsuccessful_ip'] = $GLOBALS['phpgw_info']['server']['num_unsuccessful_id']; // default same as for id
166	$save_rep = True;
167	}
168	if (!isset($GLOBALS['phpgw_info']['server']['install_id']))
169	{
170	$GLOBALS['phpgw_info']['server']['install_id'] = md5($GLOBALS['phpgw']->common->randomstring(15));
171	$save_rep = True;
172	}
173	if (!isset($GLOBALS['phpgw_info']['server']['sessions_timeout']))
174	{
175	$GLOBALS['phpgw_info']['server']['sessions_timeout'] = 14400;
176	$save_rep = True;
177	}
178	if (!isset($GLOBALS['phpgw_info']['server']['sessions_app_timeout']))
179	{
180	$GLOBALS['phpgw_info']['server']['sessions_app_timeout'] = 86400;
181	$save_rep = True;
182	}
183	if (!isset($GLOBALS['phpgw_info']['server']['max_history']))
184	{
185	$GLOBALS['phpgw_info']['server']['max_history'] = 20;
186	$save_rep = True;
187	}
188
189	// jakjr: ? usando o hardcode, para evitar sempre 2 chamadas ao banco.
190	/*
191	if ($save_rep)
192	{
193	$config = CreateObject('phpgwapi.config','phpgwapi');
194	$config->read_repository();
195	$config->value('max_access_log_age',$GLOBALS['phpgw_info']['server']['max_access_log_age']);
196	$config->value('block_time',$GLOBALS['phpgw_info']['server']['block_time']);
197	$config->value('num_unsuccessful_id',$GLOBALS['phpgw_info']['server']['num_unsuccessful_id']);
198	$config->value('num_unsuccessful_ip',$GLOBALS['phpgw_info']['server']['num_unsuccessful_ip']);
199	$config->value('install_id',$GLOBALS['phpgw_info']['server']['install_id']);
200	$config->value('sessions_timeout',$GLOBALS['phpgw_info']['server']['sessions_timeout']);
201	$config->value('sessions_app_timeout',$GLOBALS['phpgw_info']['server']['sessions_app_timeout']);
202	$config->save_repository();
203	unset($config);
204	}*/
205	}
206
207	/**
208	* Introspection for XML-RPC/SOAP
209	* Diabled - why??
210	*
211	* @param string $_type tpye of introspection being sought
212	* @return array available methods and args
213	*/
214	function DONTlist_methods($_type)
215	{
216	if (is_array($_type))
217	{
218	$_type = $_type['type'];
219	}
220
221	switch($_type)
222	{
223	case 'xmlrpc':
224	$xml_functions = array(
225	'list_methods' => array(
226	'function' => 'list_methods',
227	'signature' => array(array(xmlrpcStruct,xmlrpcString)),
228	'docstring' => lang('Read this list of methods.')
229	),
230	'update_dla' => array(
231	'function' => 'update_dla',
232	'signature' => array(array(xmlrpcBoolean)),
233	'docstring' => lang('Returns an array of todo items')
234	)
235	);
236	return $xml_functions;
237	break;
238	case 'soap':
239	return $this->soap_functions;
240	break;
241	default:
242	return array();
243	break;
244	}
245	}
246
247	function split_login_domain($both,&$login,&$domain)
248	{
249	$parts = explode('@',$both);
250	$domain = count($parts) > 1 ? array_pop($parts) :
251	$GLOBALS['phpgw_info']['server']['default_domain'];
252	$login = implode('@',$parts);
253	}
254
255	/**
256	* Check to see if a session is still current and valid
257	*
258	* @param string $sessionid session id to be verfied
259	* @param string $kp3 ?? to be verified
260	* @return bool is the session valid?
261	*/
262	function verify($sessionid='',$kp3='')
263	{
264	if(empty($sessionid) \|\| !$sessionid)
265	{
266	$sessionid = get_var('sessionid',array('GET','COOKIE'));
267	$kp3 = get_var('kp3',array('GET','COOKIE'));
268	}
269
270	$this->sessionid = $sessionid;
271	$this->kp3 = $kp3;
272
273	$session = $this->read_session();
274	//echo "<pre>session::verify(id='$sessionid'): \n".print_r($session,True)."</pre>\n";
275	/*
276	$fp = fopen('/tmp/session_verify','a+');
277	fwrite($fp,"session::verify(id='$sessionid'): \n".print_r($session,True)."\n\n");
278	fclose($fp);
279	*/
280	if ($session['session_dla'] <= (time() - $GLOBALS['phpgw_info']['server']['sessions_timeout']))
281	{
282	$this->destroy($sessionid,$kp3);
283	return False;
284	}
285
286	$this->session_flags = $session['session_flags'];
287
288	sessions_::split_login_domain($session['session_lid'],$this->account_lid,$this->account_domain);
289
290	$GLOBALS['phpgw_info']['user']['kp3'] = $this->kp3;
291
292	$this->update_dla();
293	if (isset($_SESSION['phpgw_session']['account_id']))
294	$this->account_id = $_SESSION['phpgw_session']['account_id'];
295	else
296	$this->account_id = $GLOBALS['phpgw']->accounts->name2id($this->account_lid);
297	if (!$this->account_id)
298	{
299	return False;
300	}
301	$GLOBALS['phpgw_info']['user']['account_id'] = $this->account_id;
302	$_SESSION['phpgw_session']['account_id'] = $this->account_id;
303
304	/* init the crypto object before appsession call below */
305	$this->key = md5($this->kp3 . $this->sessionid . @$GLOBALS['phpgw_info']['server']['encryptkey']);
306	$this->iv = $GLOBALS['phpgw_info']['server']['mcrypt_iv'];
307	$GLOBALS['phpgw']->crypto->init(array($this->key,$this->iv));
308
309	$this->read_repositories(@$GLOBALS['phpgw_info']['server']['cache_phpgw_info']);
310	if (strlen($this->user['expires']) == 0)
311	$this->user['expires'] = $_SESSION['phpgw_session']['expires_account'];
312	if ($this->user['expires'] != -1 && $this->user['expires'] < time())
313	{
314	if(is_object($GLOBALS['phpgw']->log))
315	{
316	$GLOBALS['phpgw']->log->message(array(
317	'text' => 'W-VerifySession, account loginid %1 is expired',
318	'p1' => $this->account_lid,
319	'line' => __LINE__,
320	'file' => __FILE__
321	));
322	$GLOBALS['phpgw']->log->commit();
323	}
324	return False;
325	}
326	$_SESSION['phpgw_session']['expires_account'] = $this->user['expires'];
327
328
329	$GLOBALS['phpgw_info']['user'] = $this->user;
330	$GLOBALS['phpgw_info']['hooks'] = $this->hooks;
331
332	$GLOBALS['phpgw_info']['user']['session_ip'] = $session['session_ip'];
333	$GLOBALS['phpgw_info']['user']['passwd'] = base64_decode($this->appsession('password','phpgwapi'));
334
335	if ($this->account_domain != $GLOBALS['phpgw_info']['user']['domain'])
336	{
337	if(is_object($GLOBALS['phpgw']->log))
338	{
339	$GLOBALS['phpgw']->log->message(array(
340	'text' => 'W-VerifySession, the domains %1 and %2 don\'t match',
341	'p1' => $userid_array[1],
342	'p2' => $GLOBALS['phpgw_info']['user']['domain'],
343	'line' => __LINE__,
344	'file' => __FILE__
345	));
346	$GLOBALS['phpgw']->log->commit();
347	}
348	return False;
349	}
350
351
352	$GLOBALS['phpgw']->acl->acl($this->account_id);
353	$GLOBALS['phpgw']->accounts->accounts($this->account_id);
354	$GLOBALS['phpgw']->preferences->preferences($this->account_id);
355	$GLOBALS['phpgw']->applications->applications($this->account_id);
356
357	if (! $this->account_lid)
358	{
359	if(is_object($GLOBALS['phpgw']->log))
360	{
361	// This needs some better wording
362	$GLOBALS['phpgw']->log->message(array(
363	'text' => 'W-VerifySession, account_id is empty',
364	'line' => __LINE__,
365	'file' => __FILE__
366	));
367	$GLOBALS['phpgw']->log->commit();
368	}
369	//echo 'DEBUG: Sessions: account_id is empty!<br>'."\n";
370	return False;
371	}
372	return True;
373	}
374
375	/**
376	* Functions for creating and verifying the session
377	*/
378
379	/**
380	* Get the ip address of current users
381	*
382	* @return string ip address
383	*/
384	function getuser_ip()
385	{
386	$ip = (isset($_SERVER['HTTP_X_FORWARDED_FOR']) ? $_SERVER['HTTP_X_FORWARDED_FOR']."," : "").$_SERVER['REMOTE_ADDR'];
387	if(strlen($ip)>30) {
388	$ip_exploded = explode(",",$ip);
389	$ip = "";
390	for($i=0;$i<2;$i++)
391	$ip .= isset($ip_exploded[$i])?(($i==1?",":"").trim($ip_exploded[$i])):("");
392	if(strlen($ip)>30)
393	$ip = $ip_exploded[0];
394	}
395
396	return $ip;
397	}
398
399	/**
400	* Set the domain used for cookies
401	*
402	* @return string domain
403	*/
404	function phpgw_set_cookiedomain()
405	{
406	// Use HTTP_X_FORWARDED_HOST if set, which is the case behind a none-transparent proxy
407	$this->cookie_domain = isset($_SERVER['HTTP_X_FORWARDED_HOST']) ? $_SERVER['HTTP_X_FORWARDED_HOST'] : $_SERVER['HTTP_HOST'];
408
409	// remove port from HTTP_HOST
410	if (preg_match("/^(.):(.)$/",$this->cookie_domain,$arr))
411	{
412	$this->cookie_domain = $arr[1];
413	}
414	if (count(explode('.',$this->cookie_domain)) <= 1)
415	{
416	// setcookie dont likes domains without dots, leaving it empty, gets setcookie to fill the domain in
417	$this->cookie_domain = '';
418	}
419	print_debug('COOKIE_DOMAIN',$this->cookie_domain,'api');
420
421	$this->set_cookie_params($this->cookie_domain); // for php4 sessions necessary
422	}
423
424	/**
425	* Set a cookie
426	*
427	* @param string $cookiename name of cookie to be set
428	* @param string $cookievalue value to be used, if unset cookie is cleared (optional)
429	* @param int $cookietime when cookie should expire, 0 for session only (optional)
430	*/
431	function phpgw_setcookie($cookiename,$cookievalue='',$cookietime=0)
432	{
433	if (!$this->cookie_domain)
434	{
435	$this->phpgw_set_cookiedomain();
436	}
437	setcookie($cookiename,$cookievalue,$cookietime,'/',$this->cookie_domain,null,true);
438	}
439
440	/**
441	* Create a new session
442	*
443	* @param string $login user login
444	* @param string $passwd user password
445	* @param string $passwd_type type of password being used, ie plaintext, md5, sha1
446	* @return string session id
447	*/
448	function create($login,$passwd = '',$passwd_type = '')
449	{
450	if (is_array($login))
451	{
452	$this->login = $login['login'];
453	$this->passwd = $login['passwd'];
454	$this->passwd_type = $login['passwd_type'];
455	$login = $this->login;
456	}
457	else
458	{
459	$this->login = $login;
460	$this->passwd = $passwd;
461	$this->passwd_type = $passwd_type;
462	}
463
464	$this->clean_sessions();
465	//sessions_::split_login_domain($login,$this->account_lid,$this->account_domain);
466	// jakjr: allow uid with (@);
467	$this->account_lid = $login;
468	$this->account_domain = 'default';
469
470	$now = time();
471
472	//echo "<p>session::create(login='$login'): lid='$this->account_lid', domain='$this->account_domain'</p>\n";
473	$user_ip = $this->getuser_ip();
474
475	$this->account_id = $GLOBALS['phpgw']->accounts->name2id($this->account_lid);
476
477	if (($blocked = $this->login_blocked($login,$user_ip)) \|\| // too many unsuccessful attempts
478	$GLOBALS['phpgw_info']['server']['global_denied_users'][$this->account_lid] \|\|
479	!$GLOBALS['phpgw']->auth->authenticate($this->account_lid, $this->passwd, $this->passwd_type) \|\|
480	$this->account_id && $GLOBALS['phpgw']->accounts->get_type($this->account_id) == 'g')
481	{
482	$this->reason = $blocked ? 'blocked, too many attempts' : 'bad login or password';
483	$this->cd_reason = $blocked ? 99 : 5;
484
485	$this->log_access($this->reason,$login,$user_ip,0); // log unsuccessfull login
486	return False;
487	}
488	// Só verifica tempo de inatividade do usuário, caso esteja configurado no Administrador.
489	if(isset($GLOBALS['phpgw_info']['server']['time_to_account_expires']) &&
490	$this->account_id !=null && $this->account_lid != "expresso-admin") {
491	$last_access = $this->get_last_access_on_history($this->account_id);
492	$this->read_repositories(False);
493	if ($last_access && ($last_access+($GLOBALS['phpgw_info']['server']['time_to_account_expires']*86400) < time()))
494	{
495	if(is_object($GLOBALS['phpgw']->log))
496	{
497	$GLOBALS['phpgw']->log->message(array(
498	'text' => 'W-LoginFailure, account loginid %1 is expired for innativity',
499	'p1' => $this->account_lid,
500	'line' => __LINE__,
501	'file' => __FILE__
502	));
503	$GLOBALS['phpgw']->log->commit();
504	}
505	$this->reason = 'account is expired';
506	$this->cd_reason = 98;
507
508	return False;
509	}
510	}
511
512	/* jakjr: Expresso does not use auto-create account.
513	if (!$this->account_id && $GLOBALS['phpgw_info']['server']['auto_create_acct'] == True)
514	{
515	$this->account_id = $GLOBALS['phpgw']->accounts->auto_add($this->account_lid, $passwd);
516	}
517	*/
518
519	$GLOBALS['phpgw_info']['user']['account_id'] = $this->account_id;
520	$GLOBALS['phpgw']->accounts->accounts($this->account_id);
521	$this->sessionid = $this->new_session_id();
522	$this->kp3 = md5($GLOBALS['phpgw']->common->randomstring(15));
523
524	if ($GLOBALS['phpgw_info']['server']['usecookies'])
525	{
526	$this->phpgw_setcookie('sessionid',$this->sessionid);
527	$this->phpgw_setcookie('kp3',$this->kp3);
528	$this->phpgw_setcookie('domain',$this->account_domain);
529	}
530	if ($GLOBALS['phpgw_info']['server']['usecookies'] \|\| isset($_COOKIE['last_loginid']))
531	{
532	$this->phpgw_setcookie('last_loginid', $this->account_lid ,$now+1209600); /* For 2 weeks */
533	$this->phpgw_setcookie('last_domain',$this->account_domain,$now+1209600);
534	$this->phpgw_setcookie('last_organization',$_POST['organization'],$now+1209600);
535	}
536	unset($GLOBALS['phpgw_info']['server']['default_domain']); /* we kill this for security reasons */
537
538	/* init the crypto object */
539	$this->key = md5($this->kp3 . $this->sessionid . $GLOBALS['phpgw_info']['server']['encryptkey']);
540	$this->iv = $GLOBALS['phpgw_info']['server']['mcrypt_iv'];
541	$GLOBALS['phpgw']->crypto->init(array($this->key,$this->iv));
542
543	$this->read_repositories(False);
544	if ($this->user['expires'] != -1 && $this->user['expires'] < time())
545	{
546	if(is_object($GLOBALS['phpgw']->log))
547	{
548	$GLOBALS['phpgw']->log->message(array(
549	'text' => 'W-LoginFailure, account loginid %1 is expired',
550	'p1' => $this->account_lid,
551	'line' => __LINE__,
552	'file' => __FILE__
553	));
554	$GLOBALS['phpgw']->log->commit();
555	}
556	$this->reason = 'account is expired';
557	$this->cd_reason = 98;
558
559	return False;
560	}
561
562	$GLOBALS['phpgw_info']['user'] = $this->user;
563	$GLOBALS['phpgw_info']['hooks'] = $this->hooks;
564
565	$this->appsession('password','phpgwapi',base64_encode($this->passwd));
566	if ($GLOBALS['phpgw']->acl->check('anonymous',1,'phpgwapi'))
567	{
568	$session_flags = 'A';
569	}
570	else
571	{
572	$session_flags = 'N';
573	}
574
575	$GLOBALS['phpgw']->db->transaction_begin();
576	$this->register_session($login,$user_ip,$now,$session_flags);
577	if ($session_flags != 'A') // dont log anonymous sessions
578	{
579	$this->log_access($this->sessionid,$login,$user_ip,$this->account_id);
580	}
581	$this->appsession('account_previous_login','phpgwapi',$GLOBALS['phpgw']->auth->previous_login);
582	// Expresso
583	//$GLOBALS['phpgw']->auth->update_lastlogin($this->account_id,$user_ip);
584	$GLOBALS['phpgw']->db->transaction_commit();
585
586	//if (!$this->sessionid) echo "<p>session::create(login='$login') = '$this->sessionid': lid='$this->account_lid', domain='$this->account_domain'</p>\n";
587
588	return $this->sessionid;
589	}
590
591	/**
592	* Retorna o UNIX DATE do ultimo acesso dessa conta, baseado na tabela de histórico.
593	*/
594	function get_last_access_on_history($account_id) {
595	$GLOBALS['phpgw']->db->query("select li from phpgw_access_log where account_id='$account_id' order by li desc limit 1",__LINE__,__FILE__);
596	if(!$GLOBALS['phpgw']->db->next_record())
597	return false;
598	return $GLOBALS['phpgw']->db->f('li');
599	}
600
601	/**
602	* Write or update (for logout) the access_log
603	*
604	* @param string $sessionid id of session or 0 for unsuccessful logins
605	* @param string $login account_lid (evtl. with domain) or '' for settion the logout-time
606	* @param string $user_ip ip to log
607	* @param int $account_id numerical account_id
608	*/
609	function log_access($sessionid,$login='',$user_ip='',$account_id='')
610	{
611	$now = time();
612
613	if ($login != '')
614	{
615	if (strlen($login) > 30)
616	{
617	$login = substr($login,0,30);
618	}
619	$GLOBALS['phpgw']->db->query('INSERT INTO phpgw_access_log(sessionid,loginid,ip,li,lo,account_id,browser)'
620	. " VALUES ('" . $sessionid . "','" . $this->db->db_addslashes($login). "','"
621	. $this->db->db_addslashes($user_ip) . "',$now,0," . (int)$account_id .",'".$this->db->db_addslashes(substr($_SERVER[ 'HTTP_USER_AGENT' ],0,199))."')",__LINE__,__FILE__);
622	}
623	else if($sessionid != 'bad login or password')
624	{
625	$GLOBALS['phpgw']->db->query("UPDATE phpgw_access_log SET lo=" . $now . " WHERE sessionid='"
626	. $sessionid . "'",__LINE__,__FILE__);
627	}
628
629	/* jakjr: Clean phpgw_access_log with a crontab event.
630	if ($GLOBALS['phpgw_info']['server']['max_access_log_age'])
631	{
632	$max_age = $now - $GLOBALS['phpgw_info']['server']['max_access_log_age'] * 24 * 60 * 60;
633
634	$GLOBALS['phpgw']->db->query("DELETE FROM phpgw_access_log WHERE li < $max_age");
635	}
636	*/
637	}
638
639	/**
640	* Protect against brute force attacks, block login if too many unsuccessful login attmepts
641	*
642	* @param string $login account_lid (evtl. with domain)
643	* @param string $ip ip of the user
644	* @returns bool login blocked?
645	*/
646	function login_blocked($login,$ip)
647	{
648	/jakjr: Disable this protection. When block an proxy server ip, all the sub-network will be blocking./
649	//return false; //
650
651	$blocked = False;
652	$block_time = time() - $GLOBALS['phpgw_info']['server']['block_time'] * 60;
653	/*
654	$ip = $this->db->db_addslashes($ip);
655	$this->db->query("SELECT count(*) FROM phpgw_access_log WHERE account_id=0 AND ip='$ip' AND li > $block_time",__LINE__,__FILE__);
656	$this->db->next_record();
657	if (($false_ip = $this->db->f(0)) > $GLOBALS['phpgw_info']['server']['num_unsuccessful_ip'])
658	{
659	//echo "<p>login_blocked: ip='$ip' ".$this->db->f(0)." trys (".$GLOBALS['phpgw_info']['server']['num_unsuccessful_ip']." max.) since ".date('Y/m/d H:i',$block_time)."</p>\n";
660	$blocked = True;
661	}
662	*/
663	$login = $this->db->db_addslashes($login);
664	$this->db->query("SELECT count(*) FROM phpgw_access_log WHERE account_id=0 AND (loginid='$login' OR loginid LIKE '$login@%') AND li > $block_time",__LINE__,__FILE__);
665	$this->db->next_record();
666	if (($false_id = $this->db->f(0)) > $GLOBALS['phpgw_info']['server']['num_unsuccessful_id'])
667	{
668	//echo "<p>login_blocked: login='$login' ".$this->db->f(0)." trys (".$GLOBALS['phpgw_info']['server']['num_unsuccessful_id']." max.) since ".date('Y/m/d H:i',$block_time)."</p>\n";
669	$blocked = True;
670	}
671	if ($blocked && $GLOBALS['phpgw_info']['server']['admin_mails'] &&
672	// max. one mail each 5mins
673	$GLOBALS['phpgw_info']['server']['login_blocked_mail_time'] < time()-5*60)
674	{
675	// notify admin(s) via email
676	$from = 'eGroupWare@'.$GLOBALS['phpgw_info']['server']['mail_suffix'];
677	$subject = lang("eGroupWare: login blocked for user '%1', IP %2",$login,$ip);
678	$body = lang("Too many unsucessful attempts to login: %1 for the user '%2', %3 for the IP %4",$false_id,$login,$false_ip,$ip);
679
680	if(!is_object($GLOBALS['phpgw']->send))
681	{
682	$GLOBALS['phpgw']->send = CreateObject('phpgwapi.send');
683	}
684	$subject = $GLOBALS['phpgw']->send->encode_subject($subject);
685	$admin_mails = explode(',',$GLOBALS['phpgw_info']['server']['admin_mails']);
686	foreach($admin_mails as $to)
687	{
688	$GLOBALS['phpgw']->send->msg('email',$to,$subject,$body,'','','',$from,$from);
689	}
690	// save time of mail, to not send to many mails
691	$config = CreateObject('phpgwapi.config','phpgwapi');
692	$config->read_repository();
693	$config->value('login_blocked_mail_time',time());
694	$config->save_repository();
695	}
696	return $blocked;
697	}
698
699	/**
700	* Verfy a peer server access request
701	*
702	* @param string $sessionid session id to verfiy
703	* @param string $kp3 ??
704	* @return bool verfied?
705	*/
706	function verify_server($sessionid, $kp3)
707	{
708	$GLOBALS['phpgw']->interserver = CreateObject('phpgwapi.interserver');
709	$this->sessionid = $sessionid;
710	$this->kp3 = $kp3;
711
712	$session = $this->read_session();
713	$this->session_flags = $session['session_flags'];
714
715	list($this->account_lid,$this->account_domain) = explode('@', $session['session_lid']);
716
717	if ($this->account_domain == '')
718	{
719	$this->account_domain = $GLOBALS['phpgw_info']['server']['default_domain'];
720	}
721
722	$GLOBALS['phpgw_info']['user']['kp3'] = $this->kp3;
723	$phpgw_info_flags = $GLOBALS['phpgw_info']['flags'];
724
725	$GLOBALS['phpgw_info']['flags'] = $phpgw_info_flags;
726
727	$this->update_dla();
728	$this->account_id = $GLOBALS['phpgw']->interserver->name2id($this->account_lid);
729
730	if (!$this->account_id)
731	{
732	return False;
733	}
734
735	$GLOBALS['phpgw_info']['user']['account_id'] = $this->account_id;
736
737	$this->read_repositories(@$GLOBALS['phpgw_info']['server']['cache_phpgw_info']);
738
739	/* init the crypto object before appsession call below */
740	$this->key = md5($this->kp3 . $this->sessionid . $GLOBALS['phpgw_info']['server']['encryptkey']);
741	$this->iv = $GLOBALS['phpgw_info']['server']['mcrypt_iv'];
742	$GLOBALS['phpgw']->crypto->init(array($this->key,$this->iv));
743
744	$GLOBALS['phpgw_info']['user'] = $this->user;
745	$GLOBALS['phpgw_info']['hooks'] = $this->hooks;
746
747	$GLOBALS['phpgw_info']['user']['session_ip'] = $session['session_ip'];
748	$GLOBALS['phpgw_info']['user']['passwd'] = base64_decode($this->appsession('password','phpgwapi'));
749
750	if ($userid_array[1] != $GLOBALS['phpgw_info']['user']['domain'])
751	{
752	if(is_object($GLOBALS['phpgw']->log))
753	{
754	$GLOBALS['phpgw']->log->message(array(
755	'text' => 'W-VerifySession, the domains %1 and %2 don\t match',
756	'p1' => $userid_array[1],
757	'p2' => $GLOBALS['phpgw_info']['user']['domain'],
758	'line' => __LINE__,
759	'file' => __FILE__
760	));
761	$GLOBALS['phpgw']->log->commit();
762	}
763
764	if(is_object($GLOBALS['phpgw']->crypto))
765	{
766	$GLOBALS['phpgw']->crypto->cleanup();
767	unset($GLOBALS['phpgw']->crypto);
768	}
769	return False;
770	}
771
772	if(@$GLOBALS['phpgw_info']['server']['sessions_checkip'])
773	{
774	if((PHP_OS != 'Windows') && (PHP_OS != 'WINNT') &&
775	(!$GLOBALS['phpgw_info']['user']['session_ip'] \|\| $GLOBALS['phpgw_info']['user']['session_ip'] != $this->getuser_ip())
776	)
777	{
778	if(is_object($GLOBALS['phpgw']->log))
779	{
780	// This needs some better wording
781	$GLOBALS['phpgw']->log->message(array(
782	'text' => 'W-VerifySession, IP %1 doesn\'t match IP %2 in session table',
783	'p1' => $this->getuser_ip(),
784	'p2' => $GLOBALS['phpgw_info']['user']['session_ip'],
785	'line' => __LINE__,
786	'file' => __FILE__
787	));
788	$GLOBALS['phpgw']->log->commit();
789	}
790
791	if(is_object($GLOBALS['phpgw']->crypto))
792	{
793	$GLOBALS['phpgw']->crypto->cleanup();
794	unset($GLOBALS['phpgw']->crypto);
795	}
796	return False;
797	}
798	}
799
800	$GLOBALS['phpgw']->acl->acl($this->account_id);
801	$GLOBALS['phpgw']->accounts->accounts($this->account_id);
802	$GLOBALS['phpgw']->preferences->preferences($this->account_id);
803	$GLOBALS['phpgw']->applications->applications($this->account_id);
804
805	if (! $this->account_lid)
806	{
807	if(is_object($GLOBALS['phpgw']->log))
808	{
809	// This needs some better wording
810	$GLOBALS['phpgw']->log->message(array(
811	'text' => 'W-VerifySession, account_id is empty',
812	'line' => __LINE__,
813	'file' => __FILE__
814	));
815	$GLOBALS['phpgw']->log->commit();
816	}
817
818	if(is_object($GLOBALS['phpgw']->crypto))
819	{
820	$GLOBALS['phpgw']->crypto->cleanup();
821	unset($GLOBALS['phpgw']->crypto);
822	}
823	return False;
824	}
825	else
826	{
827	return True;
828	}
829	}
830
831	/**
832	* Validate a peer server login request
833	*
834	* @param string $login login name
835	* @param string $password password
836	* @return bool login ok?
837	*/
838	function create_server($login,$passwd)
839	{
840	$GLOBALS['phpgw']->interserver = CreateObject('phpgwapi.interserver');
841	$this->login = $login;
842	$this->passwd = $passwd;
843	$this->clean_sessions();
844	$login_array = explode('@', $login);
845	$this->account_lid = $login_array[0];
846	$now = time();
847
848	if ($login_array[1] != '')
849	{
850	$this->account_domain = $login_array[1];
851	}
852	else
853	{
854	$this->account_domain = $GLOBALS['phpgw_info']['server']['default_domain'];
855	}
856
857	$serverdata = array(
858	'server_name' => $this->account_domain,
859	'username' => $this->account_lid,
860	'password' => $passwd
861	);
862	if (!$GLOBALS['phpgw']->interserver->auth($serverdata))
863	{
864	return False;
865	exit;
866	}
867
868	if (!$GLOBALS['phpgw']->interserver->exists($this->account_lid))
869	{
870	$this->account_id = $GLOBALS['phpgw']->interserver->name2id($this->account_lid);
871	}
872	$GLOBALS['phpgw_info']['user']['account_id'] = $this->account_id;
873	$GLOBALS['phpgw']->interserver->serverid = $this->account_id;
874
875	$this->sessionid = md5($GLOBALS['phpgw']->common->randomstring(10));
876	$this->kp3 = md5($GLOBALS['phpgw']->common->randomstring(15));
877
878	/* re-init the crypto object */
879	$this->key = md5($this->kp3 . $this->sessionid . $GLOBALS['phpgw_info']['server']['encryptkey']);
880	$this->iv = $GLOBALS['phpgw_info']['server']['mcrypt_iv'];
881	$GLOBALS['phpgw']->crypto->init(array($this->key,$this->iv));
882
883	//$this->read_repositories(False);
884
885	$GLOBALS['phpgw_info']['user'] = $this->user;
886	$GLOBALS['phpgw_info']['hooks'] = $this->hooks;
887
888	$this->appsession('password','phpgwapi',base64_encode($this->passwd));
889	$session_flags = 'S';
890
891	$user_ip = $this->getuser_ip();
892
893	$GLOBALS['phpgw']->db->transaction_begin();
894	$this->register_session($login,$user_ip,$now,$session_flags);
895
896	$this->log_access($this->sessionid,$login,$user_ip,$this->account_id);
897
898	$this->appsession('account_previous_login','phpgwapi',$GLOBALS['phpgw']->auth->previous_login);
899	$GLOBALS['phpgw']->auth->update_lastlogin($this->account_id,$user_ip);
900	$GLOBALS['phpgw']->db->transaction_commit();
901
902	return array($this->sessionid,$this->kp3);
903	}
904
905	/**
906	* Functions for appsession data and session cache
907	*/
908
909	/**
910	* Is this also useless?? (skwashd)
911	*/
912	function read_repositories($cached='',$write_cache=True)
913	{
914	$GLOBALS['phpgw']->acl->acl($this->account_id);
915	$GLOBALS['phpgw']->accounts->accounts($this->account_id);
916	$GLOBALS['phpgw']->preferences->preferences($this->account_id);
917	$GLOBALS['phpgw']->applications->applications($this->account_id);
918
919	if(@$cached)
920	{
921	$this->user = $this->appsession('phpgw_info_cache','phpgwapi');
922	if(!empty($this->user))
923	{
924	$GLOBALS['phpgw']->preferences->data = $this->user['preferences'];
925	if (!isset($GLOBALS['phpgw_info']['apps']) \|\| !is_array($GLOBALS['phpgw_info']['apps']))
926	{
927	$GLOBALS['phpgw']->applications->read_installed_apps();
928	}
929	}
930	else
931	{
932	$this->setup_cache($write_cache);
933	}
934	}
935	else
936	{
937	$this->setup_cache($write_cache);
938	}
939	$this->hooks = $GLOBALS['phpgw']->hooks->read();
940	}
941
942	/**
943	* Is this also useless?? (skwashd)
944	*/
945	function setup_cache($write_cache=True)
946	{
947	$this->user = $GLOBALS['phpgw']->accounts->read_repository();
948	$this->user['acl'] = $GLOBALS['phpgw']->acl->read_repository();
949	$this->user['preferences'] = $GLOBALS['phpgw']->preferences->read_repository();
950	$this->user['apps'] = $GLOBALS['phpgw']->applications->read_repository();
951	//@reset($this->data['user']['apps']);
952
953	$this->user['domain'] = $this->account_domain;
954	$this->user['sessionid'] = $this->sessionid;
955	$this->user['kp3'] = $this->kp3;
956	$this->user['session_ip'] = $this->getuser_ip();
957	$this->user['session_lid'] = $this->account_lid.'@'.$this->account_domain;
958	$this->user['account_id'] = $this->account_id;
959	$this->user['account_lid'] = $this->account_lid;
960	$this->user['userid'] = $this->account_lid;
961	$this->user['passwd'] = @$this->passwd;
962	if(@$GLOBALS['phpgw_info']['server']['cache_phpgw_info'] && $write_cache)
963	{
964	$this->delete_cache();
965	$this->appsession('phpgw_info_cache','phpgwapi',$this->user);
966	}
967	}
968
969	/**
970	* This looks to be useless
971	* This will capture everything in the $GLOBALS['phpgw_info'] including server info,
972	* and store it in appsessions. This is really incompatible with any type of restoring
973	* from appsession as the saved user info is really in ['user'] rather than the root of
974	* the structure, which is what this class likes.
975	*/
976	function save_repositories()
977	{
978	$phpgw_info_temp = $GLOBALS['phpgw_info'];
979	$phpgw_info_temp['user']['kp3'] = '';
980	$phpgw_info_temp['flags'] = array();
981
982	if ($GLOBALS['phpgw_info']['server']['cache_phpgw_info'])
983	{
984	$this->appsession('phpgw_info_cache','phpgwapi',$phpgw_info_temp);
985	}
986	}
987
988	function restore()
989	{
990	$sessionData = $this->appsession('sessiondata');
991
992	if (!empty($sessionData) && is_array($sessionData))
993	{
994	foreach($sessionData as $key => $value)
995	{
996	global $$key;
997	$$key = $value;
998	$this->variableNames[$key] = 'registered';
999	// echo 'restored: '.$key.', ' . $value . '<br>';
1000	}
1001	}
1002	}
1003
1004	/**
1005	* Save the current values of all registered variables
1006	*/
1007	function save()
1008	{
1009	if (is_array($this->variableNames))
1010	{
1011	reset($this->variableNames);
1012	while(list($key, $value) = each($this->variableNames))
1013	{
1014	if ($value == 'registered')
1015	{
1016	global $$key;
1017	$sessionData[$key] = $$key;
1018	}
1019	}
1020	$this->appsession('sessiondata','',$sessionData);
1021	}
1022	}
1023
1024	/**
1025	* Create a list a variable names, which data needs to be restored
1026	*
1027	* @param string $_variableName name of variable to be registered
1028	*/
1029	function register($_variableName)
1030	{
1031	$this->variableNames[$_variableName]='registered';
1032	#print 'registered '.$_variableName.'<br>';
1033	}
1034
1035	/**
1036	* Mark variable as unregistered
1037	*
1038	* @param string $_variableName name of variable to deregister
1039	*/
1040	function unregister($_variableName)
1041	{
1042	$this->variableNames[$_variableName]='unregistered';
1043	#print 'unregistered '.$_variableName.'<br>';
1044	}
1045
1046	/**
1047	* Check if we have a variable registred already
1048	*
1049	* @param string $_variableName name of variable to check
1050	* @return bool was the variable found?
1051	*/
1052	function is_registered($_variableName)
1053	{
1054	if ($this->variableNames[$_variableName] == 'registered')
1055	{
1056	return True;
1057	}
1058	else
1059	{
1060	return False;
1061	}
1062	}
1063	/**
1064	* Additional tracking of user actions - prevents reposts/use of back button
1065	*
1066	* @author skwashd
1067	* @return string current history id
1068	*/
1069	function generate_click_history()
1070	{
1071	if(!isset($this->history_id))
1072	{
1073	$this->history_id = md5($this->login . time());
1074	$history = $this->appsession($location = 'history', $appname = 'phpgwapi');
1075
1076	if(count($history) >= $GLOBALS['phpgw_info']['server']['max_history'])
1077	{
1078	array_shift($history);
1079	$this->appsession($location = 'history', $appname = 'phpgwapi', $history);
1080	}
1081	}
1082	return $this->history_id;
1083	}
1084
1085	/**
1086	* Detects if the page has already been called before - good for forms
1087	*
1088	* @author skwashd
1089	* @param bool $diplay_error when implemented will use the generic error handling code
1090	* @return True if called previously, else False - call ok
1091	*/
1092	function is_repost($display_error = False)
1093	{
1094	$history = $this->appsession($location = 'history', $appname = 'phpgwapi');
1095	if(isset($history[$_GET['click_history']]))
1096	{
1097	if($display_error)
1098	{
1099	$GLOBALS['phpgw']->redirect_link('/error.php', 'type=repost');//more on this later :)
1100	}
1101	else
1102	{
1103	return True; //handled by the app
1104	}
1105	}
1106	else
1107	{
1108	$history[$_GET['click_history']] = True;
1109	$this->appsession($location = 'history', $appname = 'phpgwapi', $history);
1110	return False;
1111	}
1112	}
1113
1114	/**
1115	* Generate a url which supports url or cookies based sessions
1116	*
1117	* @param string $url a url relative to the egroupware install root
1118	* @param array $extravars query string arguements
1119	* @return string generated url
1120	*/
1121	function link($url, $extravars = '')
1122	{
1123	//echo "<p>session::link(url='".print_r($url,True)."',extravars='".print_r($extravars,True)."')";
1124	/* first we process the $url to build the full scriptname */
1125	$full_scriptname = True;
1126
1127	$url_firstchar = substr($url ,0,1);
1128	if ($url_firstchar == '/' && $GLOBALS['phpgw_info']['server']['webserver_url'] == '/')
1129	{
1130	$full_scriptname = False;
1131	}
1132
1133	if ($url_firstchar != '/')
1134	{
1135	$app = $GLOBALS['phpgw_info']['flags']['currentapp'];
1136	if ($app != 'home' && $app != 'login' && $app != 'logout')
1137	{
1138	$url = $app.'/'.$url;
1139	}
1140	}
1141
1142	if($full_scriptname)
1143	{
1144	$webserver_url_count = strlen($GLOBALS['phpgw_info']['server']['webserver_url'])-1;
1145	if(substr($GLOBALS['phpgw_info']['server']['webserver_url'] ,$webserver_url_count,1) != '/' && $url_firstchar != '/')
1146	{
1147	$url = $GLOBALS['phpgw_info']['server']['webserver_url'] .'/'. $url;
1148	}
1149	else
1150	{
1151	$url = $GLOBALS['phpgw_info']['server']['webserver_url'] . $url;
1152	}
1153	}
1154
1155	if(@isset($GLOBALS['phpgw_info']['server']['enforce_ssl']) && $GLOBALS['phpgw_info']['server']['enforce_ssl']) // && !$_SERVER['HTTPS']) imho https should always be a full path - skwashd
1156	{
1157	if(substr($url ,0,4) != 'http')
1158	{
1159	$url = 'https://'.$GLOBALS['phpgw_info']['server']['hostname'].$url;
1160	}
1161	else
1162	{
1163	$url = str_replace ( 'http:', 'https:', $url);
1164	}
1165	}
1166
1167	/* Now we process the extravars into a proper url format */
1168	/* if its not an array, then we turn it into one */
1169	/* We do this to help prevent any duplicates from being sent. */
1170	if (!is_array($extravars) && $extravars != '')
1171	{
1172	$new_extravars = Array();
1173
1174	$a = explode('&', $extravars);
1175	$i = 0;
1176	while ($i < count($a))
1177	{
1178	$b = split('=', $a[$i],2);
1179	// Check if this value doesn't already exist in new_extravars
1180	if(array_key_exists($b[0], $new_extravars))
1181	{
1182	// print "Debug::Error !!! " . $b[0] . " ($i) already exists<br>";
1183	if( eregi("\[\]", $b[0]) )
1184	{
1185	$b[0] = eregi_replace("\[\]", "[$i]", $b[0]);
1186	}
1187	}
1188
1189	$new_extravars[$b[0]] = $b[1];
1190	$i++;
1191	}
1192	$extravars = $new_extravars;
1193	unset($new_extravars);
1194	}
1195
1196	/* if using frames we make sure there is a framepart */
1197	if(@defined('PHPGW_USE_FRAMES') && PHPGW_USE_FRAMES)
1198	{
1199	if (!isset($extravars['framepart']))
1200	{
1201	$extravars['framepart']='body';
1202	}
1203	}
1204
1205	/* add session params if not using cookies */
1206	if (@!$GLOBALS['phpgw_info']['server']['usecookies'])
1207	{
1208	$extravars['sessionid'] = $this->sessionid;
1209	$extravars['kp3'] = $this->kp3;
1210	$extravars['domain'] = $this->account_domain;
1211	}
1212
1213	//used for repost prevention
1214	// $extravars['click_history'] = $this->generate_click_history();
1215
1216	/* if we end up with any extravars then we generate the url friendly string */
1217	if (is_array($extravars))
1218	{
1219	$new_extravars = '';
1220	foreach($extravars as $key => $value)
1221	{
1222	if (!empty($new_extravars))
1223	{
1224	$new_extravars .= '&';
1225	}
1226	$new_extravars .= $key.'='.urlencode($value);
1227	}
1228	$url .= '?' . $new_extravars;
1229	}
1230	//echo " = '$url'</p>\n";
1231	return $url;
1232	}
1233
1234	/**
1235	* The remaining methods are abstract - as they are unique for each session handler
1236	*/
1237
1238	/**
1239	* Load user's session information
1240	*
1241	* The sessionid of the session to read is passed in the class-var $this->sessionid
1242	*
1243	* @return mixed the session data
1244	*/
1245	function read_session()
1246	{}
1247
1248	/**
1249	* Remove stale sessions out of the database
1250	*/
1251	function clean_sessions()
1252	{}
1253
1254	/**
1255	* Set paramaters for cookies - only implemented in PHP4 sessions
1256	*
1257	* @param string $domain domain name to use in cookie
1258	*/
1259
1260	function set_cookie_params($domain)
1261	{}
1262
1263	/**
1264	* Create a new session id
1265	*
1266	* @return string a new session id
1267	*/
1268	function new_session_id()
1269	{}
1270
1271	/**
1272	* Create a new session
1273	*
1274	* @param string $login user login
1275	* @param string $user_ip users ip address
1276	* @param int $now time now as a unix timestamp
1277	* @param string $session_flags A = Anonymous, N = Normal
1278	*/
1279	function register_session($login,$user_ip,$now,$session_flags)
1280	{}
1281
1282	/**
1283	* Update the date last active info for the session, so the login does not expire
1284	*
1285	* @return bool did it suceed?
1286	*/
1287	function update_dla()
1288	{}
1289
1290	/**
1291	* Terminate a session
1292	*
1293	* @param string $sessionid the id of the session to be terminated
1294	* @param string $kp3 - NOT SURE
1295	* @return bool did it suceed?
1296	*/
1297	function destroy($sessionid, $kp3)
1298	{}
1299
1300	/**
1301	* Functions for appsession data and session cache
1302	*/
1303
1304	/**
1305	* Delete all data from the session cache for a user
1306	*
1307	* @param int $accountid user account id, defaults to current user (optional)
1308	*/
1309	function delete_cache($accountid='')
1310	{}
1311
1312	/**
1313	* Stores or retrieves information from the sessions cache
1314	*
1315	* @param string $location identifier for data
1316	* @param string $appname name of app which is responsbile for the data
1317	* @param mixed $data data to be stored, if left blank data is retreived (optional)
1318	* @return mixed data from cache, only returned if $data arg is not used
1319	*/
1320	function appsession($location = 'default', $appname = '', $data = '##NOTHING##')
1321	{}
1322
1323	/**
1324	* Get list of normal / non-anonymous sessions
1325	* Note: The data from the session-files get cached in the app_session phpgwapi/php4_session_cache
1326	*
1327	* @author ralfbecker
1328	* @param int $start session to start at
1329	* @param string $order field to sort on
1330	* @param string $sort sort order
1331	* @param bool $all_no_sort list all with out sorting (optional) default False
1332	* @return array info for all current sessions
1333	*/
1334	function list_sessions($start,$order,$sort,$all_no_sort = False)
1335	{}
1336
1337	/**
1338	* Get the number of normal / non-anonymous sessions
1339	*
1340	* @author ralfbecker
1341	* @return int number of sessions
1342	*/
1343	function total()
1344	{}
1345	}
1346
1347	if(empty($GLOBALS['phpgw_info']['server']['sessions_type']))
1348	{
1349	$GLOBALS['phpgw_info']['server']['sessions_type'] = 'php4'; // the more performant default
1350	}
1351	// for php4 sessions, check if the extension is loaded, try loading it and fallback to db sessions if not
1352	if ($GLOBALS['phpgw_info']['server']['sessions_type'] == 'php4' && !extension_loaded('session'))
1353	{
1354	// some constanst for pre php4.3
1355	if (!defined('PHP_SHLIB_SUFFIX'))
1356	{
1357	define('PHP_SHLIB_SUFFIX',strtoupper(substr(PHP_OS, 0,3)) == 'WIN' ? 'dll' : 'so');
1358	}
1359	if (!defined('PHP_SHLIB_PREFIX'))
1360	{
1361	define('PHP_SHLIB_PREFIX',PHP_SHLIB_SUFFIX == 'dll' ? 'php_' : '');
1362	}
1363	if (!function_exists('dl') \|\| !@dl(PHP_SHLIB_PREFIX.'session'.'.'.PHP_SHLIB_SUFFIX))
1364	{
1365	$GLOBALS['phpgw_info']['server']['sessions_type'] = 'db'; // fallback if we have no php4 sessions support
1366	}
1367	}
1368	include_once(PHPGW_API_INC.'/class.sessions_'.$GLOBALS['phpgw_info']['server']['sessions_type'].'.inc.php');

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