<?php 
  /**************************************************************************\
  * phpGroupWare API - Session management                                    *
  * This file written by Dan Kuykendall <seek3r@phpgroupware.org>            *
  * and Joseph Engo <jengo@phpgroupware.org>                                 *
  * and Ralf Becker <ralfbecker@outdoor-training.de>                         *
  * Copyright (C) 2000, 2001 Dan Kuykendall                                  *
  * -------------------------------------------------------------------------*
  * This library is part of the phpGroupWare API                             *
  * http://www.phpgroupware.org/api                                          * 
  * ------------------------------------------------------------------------ *
  * This library is free software; you can redistribute it and/or modify it  *
  * under the terms of the GNU Lesser General Public License as published by *
  * the Free Software Foundation; either version 2.1 of the License,         *
  * or any later version.                                                    *
  * This library is distributed in the hope that it will be useful, but      *
  * WITHOUT ANY WARRANTY; without even the implied warranty of               *
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.                     *
  * See the GNU Lesser General Public License for more details.              *
  * You should have received a copy of the GNU Lesser General Public License *
  * along with this library; if not, write to the Free Software Foundation,  *
  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA            *
  \**************************************************************************/

	/* $Id$ */

	/*
	** Reserved session_flags
	** A - anonymous session
	** N - None, normal session
	*/

	if (empty($GLOBALS['phpgw_info']['server']['sessions_type']))
	{
		$GLOBALS['phpgw_info']['server']['sessions_type'] = 'db';
	}
	include_once(PHPGW_API_INC.'/class.sessions_'.$GLOBALS['phpgw_info']['server']['sessions_type'].'.inc.php');

	class sessions extends sessions_
	{
		var $login;
		var $passwd;
		var $account_id;
		var $account_lid;
		var $account_domain;
		var $session_flags;
		var $sessionid;
		var $kp3;
		var $key;
		var $iv;

		var $data;
		var $db;
		var $public_functions = array(
			'list_methods' => True,
			'update_dla'   => True,
			'list'         => True,
			'total'        => True
		);

		var $cookie_domain;
		var $xmlrpc_method_called;

		/*************************************************************************\
		* Constructor just loads up some defaults from cookies                    *
		\*************************************************************************/
		function sessions()
		{

			$this->db = $GLOBALS['phpgw']->db;
			$this->sessionid = get_var('sessionid',array('GET','COOKIE'));
			$this->kp3       = get_var('kp3',array('GET','COOKIE'));

			/* Create the crypto object */
			$GLOBALS['phpgw']->crypto = CreateObject('phpgwapi.crypto');
			$this->phpgw_set_cookiedomain();

			// verfiy and if necessary create and save our config settings
			//
			$save_rep = False;
			if (!isset($GLOBALS['phpgw_info']['server']['max_access_log_age']))
			{
				$GLOBALS['phpgw_info']['server']['max_access_log_age'] = 90;	// default 90 days
				$save_rep = True;
			}
			if (!isset($GLOBALS['phpgw_info']['server']['block_time']))
			{
				$GLOBALS['phpgw_info']['server']['block_time'] = 30;	// default 30min
				$save_rep = True;
			}
			if (!isset($GLOBALS['phpgw_info']['server']['num_unsuccessful_id']))
			{
				$GLOBALS['phpgw_info']['server']['num_unsuccessful_id']  = 3;	// default 3 trys per id
				$save_rep = True;
			}
			if (!isset($GLOBALS['phpgw_info']['server']['num_unsuccessful_ip']))
			{
				$GLOBALS['phpgw_info']['server']['num_unsuccessful_ip']  = $GLOBALS['phpgw_info']['server']['num_unsuccessful_id'];	// default same as for id
				$save_rep = True;
			}
			if (!isset($GLOBALS['phpgw_info']['server']['install_id']))
			{
				$GLOBALS['phpgw_info']['server']['install_id']  = md5($GLOBALS['phpgw']->common->randomstring(15));
				$save_rep = True;
			}
			if (!isset($GLOBALS['phpgw_info']['server']['sessions_timeout']))
			{
				$GLOBALS['phpgw_info']['server']['sessions_timeout'] = 14400;
				$save_rep = True;
			}
			if (!isset($GLOBALS['phpgw_info']['server']['sessions_app_timeout']))
			{
				$GLOBALS['phpgw_info']['server']['sessions_app_timeout'] = 86400;
				$save_rep = True;
			}
			if ($save_rep)
			{
				$config = CreateObject('phpgwapi.config','phpgwapi');
				$config->read_repository();
				$config->value('max_access_log_age',$GLOBALS['phpgw_info']['server']['max_access_log_age']);
				$config->value('block_time',$GLOBALS['phpgw_info']['server']['block_time']);
				$config->value('num_unsuccessful_id',$GLOBALS['phpgw_info']['server']['num_unsuccessful_id']);
				$config->value('num_unsuccessful_ip',$GLOBALS['phpgw_info']['server']['num_unsuccessful_ip']);
				$config->value('install_id',$GLOBALS['phpgw_info']['server']['install_id']);
				$config->value('sessions_timeout',$GLOBALS['phpgw_info']['server']['sessions_timeout']);
				$config->value('sessions_app_timeout',$GLOBALS['phpgw_info']['server']['sessions_app_timeout']);
				$config->save_repository();
				unset($config);
			}

			// call the constructor of the extended class
			$this->sessions_();
		}

		function DONTlist_methods($_type)
		{
			if (is_array($_type))
			{
				$_type = $_type['type'];
			}

			switch($_type)
			{
				case 'xmlrpc':
					$xml_functions = array(
						'list_methods' => array(
							'function'  => 'list_methods',
							'signature' => array(array(xmlrpcStruct,xmlrpcString)),
							'docstring' => lang('Read this list of methods.')
						),
						'update_dla' => array(
							'function'  => 'update_dla',
							'signature' => array(array(xmlrpcBoolean)),
							'docstring' => lang('Returns an array of todo items')
						)
					);
					return $xml_functions;
					break;
				case 'soap':
					return $this->soap_functions;
					break;
				default:
					return array();
					break;
			}
		}

		function verify($sessionid='',$kp3='')
		{
			if(empty($sessionid) || !$sessionid)
			{
				$sessionid = get_var('sessionid',array('GET','COOKIE'));
				$kp3       = get_var('kp3',array('GET','COOKIE'));
			}

			$this->sessionid = $sessionid;
			$this->kp3       = $kp3;

			$session = $this->read_session($sessionid);
			//echo "session::verify(id='$sessionid'): \n<pre>"; print_r($session); echo "</pre>\n";

			if ($session['session_dla'] <= (time() - $GLOBALS['phpgw_info']['server']['sessions_timeout']))
			{
				$this->clean_sessions();
				return False;
			}

			$this->session_flags = $session['session_flags'];

			list($this->account_lid,$this->account_domain) = explode('@', $session['session_lid']);

			if ($this->account_domain == '')
			{
				$this->account_domain = $GLOBALS['phpgw_info']['server']['default_domain'];
			}

			$GLOBALS['phpgw_info']['user']['kp3'] = $this->kp3;

			$this->update_dla();
			$this->account_id = $GLOBALS['phpgw']->accounts->name2id($this->account_lid);
			if (!$this->account_id)
			{
				return False;
			}

			$GLOBALS['phpgw_info']['user']['account_id'] = $this->account_id;

			/* init the crypto object before appsession call below */
			$this->key = md5($this->kp3 . $this->sessionid . $GLOBALS['phpgw_info']['server']['encryptkey']);
			$this->iv  = $GLOBALS['phpgw_info']['server']['mcrypt_iv'];
			$GLOBALS['phpgw']->crypto->init(array($this->key,$this->iv));

			$this->read_repositories(@$GLOBALS['phpgw_info']['server']['cache_phpgw_info']);
			
			if ($this->user['expires'] != -1 && $this->user['expires'] < time())
			{
				if(is_object($GLOBALS['phpgw']->log))
				{
					$GLOBALS['phpgw']->log->message(array(
						'text' => 'W-VerifySession, account loginid %1 is expired',
						'p1'   => $this->account_lid,
						'line' => __LINE__,
						'file' => __FILE__
					));
					$GLOBALS['phpgw']->log->commit();
				}
				if(is_object($GLOBALS['phpgw']->crypto))
				{
					$GLOBALS['phpgw']->crypto->cleanup();
					unset($GLOBALS['phpgw']->crypto);
				}
				return False;
			}

			$GLOBALS['phpgw_info']['user']  = $this->user;
			$GLOBALS['phpgw_info']['hooks'] = $this->hooks;

			$GLOBALS['phpgw_info']['user']['session_ip'] = $session['session_ip'];
			$GLOBALS['phpgw_info']['user']['passwd']     = base64_decode($this->appsession('password','phpgwapi'));

			if ($this->account_domain != $GLOBALS['phpgw_info']['user']['domain'])
			{
				if(is_object($GLOBALS['phpgw']->log))
				{
					$GLOBALS['phpgw']->log->message(array(
						'text' => 'W-VerifySession, the domains %1 and %2 don\'t match',
						'p1'   => $userid_array[1],
						'p2'   => $GLOBALS['phpgw_info']['user']['domain'],
						'line' => __LINE__,
						'file' => __FILE__
					));
					$GLOBALS['phpgw']->log->commit();
				}
				if(is_object($GLOBALS['phpgw']->crypto))
				{
					$GLOBALS['phpgw']->crypto->cleanup();
					unset($GLOBALS['phpgw']->crypto);
				}
				return False;
			}

			if (@$GLOBALS['phpgw_info']['server']['sessions_checkip'])
			{
				if (PHP_OS != 'Windows' && (! $GLOBALS['phpgw_info']['user']['session_ip'] || $GLOBALS['phpgw_info']['user']['session_ip'] != $this->getuser_ip()))
				{
					if(is_object($GLOBALS['phpgw']->log))
					{
						// This needs some better wording
						$GLOBALS['phpgw']->log->message(array(
							'text' => 'W-VerifySession, IP %1 doesn\'t match IP %2 in session table',
							'p1'   => $this->getuser_ip(),
							'p2'   => $GLOBALS['phpgw_info']['user']['session_ip'],
							'line' => __LINE__,
							'file' => __FILE__
						));
						$GLOBALS['phpgw']->log->commit();
					}
					if(is_object($GLOBALS['phpgw']->crypto))
					{
						$GLOBALS['phpgw']->crypto->cleanup();
						unset($GLOBALS['phpgw']->crypto);
					}
					return False;
				}
			}

			$GLOBALS['phpgw']->acl->acl($this->account_id);
			$GLOBALS['phpgw']->accounts->accounts($this->account_id);
			$GLOBALS['phpgw']->preferences->preferences($this->account_id);
			$GLOBALS['phpgw']->applications->applications($this->account_id);

			if (! $this->account_lid)
			{
				if(is_object($GLOBALS['phpgw']->log))
				{
					// This needs some better wording
					$GLOBALS['phpgw']->log->message(array(
						'text' => 'W-VerifySession, account_id is empty',
						'line' => __LINE__,
						'file' => __FILE__
					));
					$GLOBALS['phpgw']->log->commit();
				}
				if(is_object($GLOBALS['phpgw']->crypto))
				{
					$GLOBALS['phpgw']->crypto->cleanup();
					unset($GLOBALS['phpgw']->crypto);
				}
				//echo 'DEBUG: Sessions: account_id is empty!<br>'."\n";
				return False;
			}
			else
			{
				return True;
			}
		}

		/*************************************************************************\
		* Functions for creating and verifying the session                        *
		\*************************************************************************/
		function getuser_ip()
		{
			return (isset($_SERVER['HTTP_X_FORWARDED_FOR']) ? $_SERVER['HTTP_X_FORWARDED_FOR'] : $_SERVER['REMOTE_ADDR']);
		}

		function phpgw_set_cookiedomain()
		{
			$dom = $_SERVER['HTTP_HOST'];
			if (preg_match("/^(.*):(.*)$/",$dom,$arr))
			{
				$dom = $arr[1];
			}
			$parts = explode('.',$dom);
			if (count($parts) > 2)
			{
				if (!ereg('[0-9]+',$parts[1]))
				{
					for($i=1;$i<count($parts);$i++)
					{
						$this->cookie_domain .= '.'.$parts[$i];
					}
				}
				else
				{
					$this->cookie_domain = '';
				}
			}
			else
			{
				$this->cookie_domain = '';
			}
			print_debug('COOKIE_DOMAIN',$this->cookie_domain,'api');
			
			$this->set_cookie_params($this->cookie_domain);	// for php4 sessions necessary
		}

		function phpgw_setcookie($cookiename,$cookievalue='',$cookietime=0)
		{
			if (!$this->cookie_domain)
			{
				$this->phpgw_set_cookiedomain();
			}
			setcookie($cookiename,$cookievalue,$cookietime,'/',$this->cookie_domain); 
		}

		function create($login,$passwd = '',$passwd_type = '')
		{
			if (is_array($login))
			{
				$this->login       = $login['login'];
				$this->passwd      = $login['passwd'];
				$this->passwd_type = $login['passwd_type'];
				$login             = $this->login;
			}
			else
			{
				$this->login       = $login;
				$this->passwd      = $passwd;
				$this->passwd_type = $passwd_type;
			}

			$this->clean_sessions();
			list($this->account_lid,$this->account_domain) = explode('@', $login);
			$now = time();

			if (strstr($login,'@') === False)
			{
				$this->account_domain = $GLOBALS['phpgw_info']['server']['default_domain'];
			}

			//echo "<p>session::create(login='$login'): lid='$this->account_lid', domain='$this->account_domain'</p>\n";
			$user_ip = $this->getuser_ip();

			if (($blocked = $this->login_blocked($login,$user_ip)) ||	// too many unsuccessful attempts
				$GLOBALS['phpgw_info']['server']['global_denied_users'][$this->account_lid] ||
				!$GLOBALS['phpgw']->auth->authenticate($this->account_lid, $this->passwd, $this->passwd_type) || 
				$GLOBALS['phpgw']->accounts->get_type($this->account_lid) == 'g')
			{
				$this->reason = $blocked ? 'blocked, too many attempts' : 'bad login or password';
				$this->cd_reason = $blocked ? 99 : 5;
				
				$this->log_access($this->reason,$login,$user_ip,0);	// log unsuccessfull login
				return False;
			}

			if ((!$GLOBALS['phpgw']->accounts->exists($this->account_lid)) && $GLOBALS['phpgw_info']['server']['auto_create_acct'] == True)
			{
				$this->account_id = $GLOBALS['phpgw']->accounts->auto_add($this->account_lid, $passwd);
			}
			else
			{
				$this->account_id = $GLOBALS['phpgw']->accounts->name2id($this->account_lid);
			}
			$GLOBALS['phpgw_info']['user']['account_id'] = $this->account_id;
			$GLOBALS['phpgw']->accounts->accounts($this->account_id);
			$this->sessionid = md5($GLOBALS['phpgw']->common->randomstring(15));
			$this->kp3       = md5($GLOBALS['phpgw']->common->randomstring(15));

			if ($GLOBALS['phpgw_info']['server']['usecookies'])
			{
				$this->phpgw_setcookie('sessionid',$this->sessionid);
				$this->phpgw_setcookie('kp3',$this->kp3);
				$this->phpgw_setcookie('domain',$this->account_domain);
			}
			if ($GLOBALS['phpgw_info']['server']['usecookies'] || isset($_COOKIE['last_loginid']))
			{ 
				$this->phpgw_setcookie('last_loginid', $this->account_lid ,$now+1209600); /* For 2 weeks */
				$this->phpgw_setcookie('last_domain',$this->account_domain,$now+1209600);
			}
			unset($GLOBALS['phpgw_info']['server']['default_domain']); /* we kill this for security reasons */

			/* init the crypto object */
			$this->key = md5($this->kp3 . $this->sessionid . $GLOBALS['phpgw_info']['server']['encryptkey']);
			$this->iv  = $GLOBALS['phpgw_info']['server']['mcrypt_iv'];
			$GLOBALS['phpgw']->crypto->init(array($this->key,$this->iv));

			$this->read_repositories(False);
			if ($this->user['expires'] != -1 && $this->user['expires'] < time())
			{
				if(is_object($GLOBALS['phpgw']->log))
				{
					$GLOBALS['phpgw']->log->message(array(
						'text' => 'W-LoginFailure, account loginid %1 is expired',
						'p1'   => $this->account_lid,
						'line' => __LINE__,
						'file' => __FILE__
					));
					$GLOBALS['phpgw']->log->commit();
				}

				return False;
			}

			$GLOBALS['phpgw_info']['user']  = $this->user;
			$GLOBALS['phpgw_info']['hooks'] = $this->hooks;

			$this->appsession('password','phpgwapi',base64_encode($this->passwd));
			if ($GLOBALS['phpgw']->acl->check('anonymous',1,'phpgwapi'))
			{
				$session_flags = 'A';
			}
			else
			{
				$session_flags = 'N';
			}

			$GLOBALS['phpgw']->db->transaction_begin();
			$this->register_session($login,$user_ip,$now,$session_flags);
			$this->log_access($this->sessionid,$login,$user_ip,$this->account_id);
			$this->appsession('account_previous_login','phpgwapi',$GLOBALS['phpgw']->auth->previous_login);
			$GLOBALS['phpgw']->auth->update_lastlogin($this->account_id,$user_ip);
			$GLOBALS['phpgw']->db->transaction_commit();
			
			//if (!$this->sessionid) echo "<p>session::create(login='$login') = '$this->sessionid': lid='$this->account_lid', domain='$this->account_domain'</p>\n";

			return $this->sessionid;
		}

		/*!
		@function log_access
		@abstract write or update (for logout) the access_log
		@function log_access($now,$sessionid,$login='',$user_ip='',$account_id='')
		@param $sessionid id of session or 0 for unsuccessful logins
		@param $login account_lid (evtl. with domain) or '' for settion the logout-time
		@param $user_ip ip to log
		@param $account_id numerical account_id
		*/
		function log_access($sessionid,$login='',$user_ip='',$account_id='')
		{
			$now = time();

			if ($login != '')
			{
				$GLOBALS['phpgw']->db->query('INSERT INTO phpgw_access_log(sessionid,loginid,ip,li,lo,account_id)'.
					" VALUES ('" . $sessionid . "','" . $this->db->db_addslashes($login). "','" . 
					$this->db->db_addslashes($user_ip) . "',$now,0,".intval($account_id).")",__LINE__,__FILE__);
			}
			else
			{
				$GLOBALS['phpgw']->db->query("UPDATE phpgw_access_log SET lo=" . $now . " WHERE sessionid='" .
					$sessionid . "'",__LINE__,__FILE__);
			}
			if ($GLOBALS['phpgw_info']['server']['max_access_log_age'])
			{
				$max_age = $now - $GLOBALS['phpgw_info']['server']['max_access_log_age'] * 24 * 60 * 60;
				
				$GLOBALS['phpgw']->db->query("DELETE FROM phpgw_access_log WHERE li < $max_age");
			}
		}

		/*!
		@function login_blocked
		@abstract shield against brute-force-attacks, block login if to many unsuccessful logins
		@function login_blocked($login,$ip)
		@param $login account_lid (evtl. with domain)
		@param $ip ip of the user
		@returns True if blocked, else False
		*/
		function login_blocked($login,$ip)
		{
			$blocked = False;
			$block_time = time() - $GLOBALS['phpgw_info']['server']['block_time'] * 60;
			
			$ip = $this->db->db_addslashes($ip);
			$this->db->query("SELECT count(*) FROM phpgw_access_log WHERE account_id=0 AND ip='$ip' AND li > $block_time",__LINE__,__FILE__);
			$this->db->next_record();
			if (($false_ip = $this->db->f(0)) > $GLOBALS['phpgw_info']['server']['num_unsuccessful_ip'])
			{
				//echo "<p>login_blocked: ip='$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";
				$blocked = True;
			}
			$login = $this->db->db_addslashes($login);
			$this->db->query("SELECT count(*) FROM phpgw_access_log WHERE account_id=0 AND (loginid='$login' OR loginid LIKE '$login@%') AND li > $block_time",__LINE__,__FILE__);
			$this->db->next_record();
			if (($false_id = $this->db->f(0)) > $GLOBALS['phpgw_info']['server']['num_unsuccessful_id'])
			{
				//echo "<p>login_blocked: login='$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";
				$blocked = True;
			}
			if ($blocked && $GLOBALS['phpgw_info']['server']['admin_mails'] &&
				// max. one mail each 5mins
			    $GLOBALS['phpgw_info']['server']['login_blocked_mail_time'] < time()-5*60)
			{
				// notify admin(s) via email
				$from    = 'phpGroupWare@'.$GLOBALS['phpgw_info']['server']['mail_suffix'];
				$subject = lang("phpGroupWare: login blocked for user '%1', IP %2",$login,$ip);
				$body    = lang("Too many unsucessful attempts to login: %1 for the user '%2', %3 for the IP %4",$false_id,$login,$false_ip,$ip);
				
				if(!is_object($GLOBALS['phpgw']->send))
				{
					$GLOBALS['phpgw']->send = CreateObject('phpgwapi.send');
				}
				$subject = $GLOBALS['phpgw']->send->encode_subject($subject);
				$admin_mails = explode(',',$GLOBALS['phpgw_info']['server']['admin_mails']);
				foreach($admin_mails as $to)
				{
					$GLOBALS['phpgw']->send->msg('email',$to,$subject,$body,'','','',$from,$from);
				}
				// save time of mail, to not send to many mails
				$config = CreateObject('phpgwapi.config','phpgwapi');
				$config->read_repository();
				$config->value('login_blocked_mail_time',time());
				$config->save_repository();
			}
			return $blocked;
		}

		function verify_server($sessionid, $kp3)
		{
			$GLOBALS['phpgw']->interserver = CreateObject('phpgwapi.interserver');
			$this->sessionid = $sessionid;
			$this->kp3       = $kp3;

			$session = $this->read_session($this->sessionid);
			$this->session_flags = $session['session_flags'];

			list($this->account_lid,$this->account_domain) = explode('@', $session['session_lid']);
			
			if ($this->account_domain == '')
			{
				$this->account_domain = $GLOBALS['phpgw_info']['server']['default_domain'];
			}

			$GLOBALS['phpgw_info']['user']['kp3'] = $this->kp3;
			$phpgw_info_flags = $GLOBALS['phpgw_info']['flags'];

			$GLOBALS['phpgw_info']['flags'] = $phpgw_info_flags;
			
			$this->update_dla();
			$this->account_id = $GLOBALS['phpgw']->interserver->name2id($this->account_lid);

			if (!$this->account_id)
			{
				return False;
			}

			$GLOBALS['phpgw_info']['user']['account_id'] = $this->account_id;
			
			$this->read_repositories(@$GLOBALS['phpgw_info']['server']['cache_phpgw_info']);

			/* init the crypto object before appsession call below */
			$this->key = md5($this->kp3 . $this->sessionid . $GLOBALS['phpgw_info']['server']['encryptkey']);
			$this->iv  = $GLOBALS['phpgw_info']['server']['mcrypt_iv'];
			$GLOBALS['phpgw']->crypto->init(array($this->key,$this->iv));

			$GLOBALS['phpgw_info']['user']  = $this->user;
			$GLOBALS['phpgw_info']['hooks'] = $this->hooks;

			$GLOBALS['phpgw_info']['user']['session_ip'] = $session['session_ip'];
			$GLOBALS['phpgw_info']['user']['passwd'] = base64_decode($this->appsession('password','phpgwapi'));

			if ($userid_array[1] != $GLOBALS['phpgw_info']['user']['domain'])
			{
				if(is_object($GLOBALS['phpgw']->log))
				{
					$GLOBALS['phpgw']->log->message(array(
						'text' => 'W-VerifySession, the domains %1 and %2 don\t match',
						'p1'   => $userid_array[1],
						'p2'   => $GLOBALS['phpgw_info']['user']['domain'],
						'line' => __LINE__,
						'file' => __FILE__
					));
					$GLOBALS['phpgw']->log->commit();
				}

				if(is_object($GLOBALS['phpgw']->crypto))
				{
					$GLOBALS['phpgw']->crypto->cleanup();
					unset($GLOBALS['phpgw']->crypto);
				}
				return False;
			}

			if (@$GLOBALS['phpgw_info']['server']['sessions_checkip'])
			{
				if (PHP_OS != 'Windows' && (! $GLOBALS['phpgw_info']['user']['session_ip'] || $GLOBALS['phpgw_info']['user']['session_ip'] != $this->getuser_ip()))
				{
					if(is_object($GLOBALS['phpgw']->log))
					{
						// This needs some better wording
						$GLOBALS['phpgw']->log->message(array(
							'text' => 'W-VerifySession, IP %1 doesn\'t match IP %2 in session table',
							'p1'   => $this->getuser_ip(),
							'p2'   => $GLOBALS['phpgw_info']['user']['session_ip'],
							'line' => __LINE__,
							'file' => __FILE__
						));
						$GLOBALS['phpgw']->log->commit();
					}

					if(is_object($GLOBALS['phpgw']->crypto))
					{
						$GLOBALS['phpgw']->crypto->cleanup();
						unset($GLOBALS['phpgw']->crypto);
					}
					return False;
				}
			}

			$GLOBALS['phpgw']->acl->acl($this->account_id);
			$GLOBALS['phpgw']->accounts->accounts($this->account_id);
			$GLOBALS['phpgw']->preferences->preferences($this->account_id);
			$GLOBALS['phpgw']->applications->applications($this->account_id);

			if (! $this->account_lid)
			{
				if(is_object($GLOBALS['phpgw']->log))
				{
					// This needs some better wording
					$GLOBALS['phpgw']->log->message(array(
						'text' => 'W-VerifySession, account_id is empty',
						'line' => __LINE__,
						'file' => __FILE__
					));
					$GLOBALS['phpgw']->log->commit();
				}

				if(is_object($GLOBALS['phpgw']->crypto))
				{
					$GLOBALS['phpgw']->crypto->cleanup();
					unset($GLOBALS['phpgw']->crypto);
				}
				return False;
			}
			else
			{
				return True;
			}
		}

		function create_server($login,$passwd)
		{
			$GLOBALS['phpgw']->interserver = CreateObject('phpgwapi.interserver');
			$this->login  = $login;
			$this->passwd = $passwd;
			$this->clean_sessions();
			$login_array = explode('@', $login);
			$this->account_lid = $login_array[0];
			$now = time();

			if ($login_array[1] != '')
			{
				$this->account_domain = $login_array[1];
			}
			else
			{
				$this->account_domain = $GLOBALS['phpgw_info']['server']['default_domain'];
			}

			$serverdata = array(
				'server_name' => $this->account_domain,
				'username'    => $this->account_lid,
				'password'    => $passwd
			);
			if (!$GLOBALS['phpgw']->interserver->auth($serverdata))
			{
				return False;
				exit;
			}

			if (!$GLOBALS['phpgw']->interserver->exists($this->account_lid))
			{
				$this->account_id = $GLOBALS['phpgw']->interserver->name2id($this->account_lid);
			}
			$GLOBALS['phpgw_info']['user']['account_id'] = $this->account_id;
			$GLOBALS['phpgw']->interserver->serverid = $this->account_id;

			$this->sessionid = md5($GLOBALS['phpgw']->common->randomstring(10));
			$this->kp3       = md5($GLOBALS['phpgw']->common->randomstring(15));

			/* re-init the crypto object */
			$this->key = md5($this->kp3 . $this->sessionid . $GLOBALS['phpgw_info']['server']['encryptkey']);
			$this->iv  = $GLOBALS['phpgw_info']['server']['mcrypt_iv'];
			$GLOBALS['phpgw']->crypto->init(array($this->key,$this->iv));

			//$this->read_repositories(False);

			$GLOBALS['phpgw_info']['user']  = $this->user;
			$GLOBALS['phpgw_info']['hooks'] = $this->hooks;

			$this->appsession('password','phpgwapi',base64_encode($this->passwd));
			$session_flags = 'S';

			$user_ip = $this->getuser_ip();

			$GLOBALS['phpgw']->db->transaction_begin();
			$this->register_session($login,$user_ip,$now,$session_flags);

			$this->log_access($this->sessionid,$login,$user_ip,$this->account_id);

			$this->appsession('account_previous_login','phpgwapi',$GLOBALS['phpgw']->auth->previous_login);
			$GLOBALS['phpgw']->auth->update_lastlogin($this->account_id,$user_ip);
			$GLOBALS['phpgw']->db->transaction_commit();

			return array($this->sessionid,$this->kp3);
		}

		/*************************************************************************\
		* Functions for appsession data and session cache                         *
		\*************************************************************************/
		function read_repositories($cached='',$write_cache=True)
		{
			$GLOBALS['phpgw']->acl->acl($this->account_id);
			$GLOBALS['phpgw']->accounts->accounts($this->account_id);
			$GLOBALS['phpgw']->preferences->preferences($this->account_id);
			$GLOBALS['phpgw']->applications->applications($this->account_id);
			
			if(@$cached)
			{
				$this->user = $this->appsession('phpgw_info_cache','phpgwapi');
				if(!empty($this->user))
				{
					$GLOBALS['phpgw']->preferences->data = $this->user['preferences'];
					if (!isset($GLOBALS['phpgw_info']['apps']) || !is_array($GLOBALS['phpgw_info']['apps']))
					{
						$GLOBALS['phpgw']->applications->read_installed_apps();
					}
				}
				else
				{
					$this->setup_cache($write_cache);
				}
			}
			else
			{
				$this->setup_cache($write_cache);
			}
			$this->hooks = $GLOBALS['phpgw']->hooks->read();
		}

		function setup_cache($write_cache=True)
		{
			$this->user                = $GLOBALS['phpgw']->accounts->read_repository();
			$this->user['acl']         = $GLOBALS['phpgw']->acl->read_repository();
			$this->user['preferences'] = $GLOBALS['phpgw']->preferences->read_repository();
			$this->user['apps']        = $GLOBALS['phpgw']->applications->read_repository();
			//@reset($this->data['user']['apps']);

			$this->user['domain']      = $this->account_domain;
			$this->user['sessionid']   = $this->sessionid;
			$this->user['kp3']         = $this->kp3;
			$this->user['session_ip']  = $this->getuser_ip();
			$this->user['session_lid'] = $this->account_lid.'@'.$this->account_domain;
			$this->user['account_id']  = $this->account_id;
			$this->user['account_lid'] = $this->account_lid;
			$this->user['userid']      = $this->account_lid;
			$this->user['passwd']      = @$this->passwd;
			if(@$GLOBALS['phpgw_info']['server']['cache_phpgw_info'] && $write_cache)
			{
				$this->delete_cache();
				$this->appsession('phpgw_info_cache','phpgwapi',$this->user);
			}
		}

// This looks to be useless
// This will capture everything in the $GLOBALS['phpgw_info'] including server info,
// and store it in appsessions.  This is really incompatible with any type of restoring
// from appsession as the saved user info is really in ['user'] rather than the root of
// the structure, which is what this class likes.
		function save_repositories()
		{
			$phpgw_info_temp = $GLOBALS['phpgw_info'];
			$phpgw_info_temp['user']['kp3'] = '';
			$phpgw_info_temp['flags'] = array();
			
			if ($GLOBALS['phpgw_info']['server']['cache_phpgw_info'])
			{
				$this->appsession('phpgw_info_cache','phpgwapi',$phpgw_info_temp);
			}
		}
	
		function restore()
		{
			$sessionData = $this->appsession('sessiondata');
			
			if (is_array($sessionData))
			{
				reset($sessionData);
				while(list($key,$value) = each($sessionData))
				{
					global $$key;
					$$key = $value;
					$this->variableNames[$key] = 'registered';
					// echo 'restored: '.$key.', ' . $value . '<br>';
				}
			}
		}

		// save the current values of the variables
		function save()
		{
			if (is_array($this->variableNames))
			{
				reset($this->variableNames);
				while(list($key, $value) = each($this->variableNames))
				{
					if ($value == 'registered')
					{
						global $$key;
						$sessionData[$key] = $$key;
					}
				}
				$this->appsession('sessiondata','',$sessionData);
			}
		}

		// create a list a variable names, wich data need's to be restored
		function register($_variableName)
		{
			$this->variableNames[$_variableName]='registered';
			#print 'registered '.$_variableName.'<br>';
		}

		// mark variable as unregistered
		function unregister($_variableName)
		{
			$this->variableNames[$_variableName]='unregistered';
			#print 'unregistered '.$_variableName.'<br>';
		}

		// check if we have a variable registred already
		function is_registered($_variableName)
		{
			if ($this->variableNames[$_variableName] == 'registered')
			{
				return True;
			}
			else
			{
				return False;
			}
		}

		/*************************************************************************\
		* Function to handle session support via url or cookies                   *
		\*************************************************************************/
		function link($url, $extravars = '')
		{
			/* first we process the $url to build the full scriptname */
			$full_scriptname = True;

			$url_firstchar = substr($url ,0,1);
			if ($url_firstchar == '/' && $GLOBALS['phpgw_info']['server']['webserver_url'] == '/')
			{
				$full_scriptname = False;
			}

			if ($url_firstchar != '/')
			{
				$app = $GLOBALS['phpgw_info']['flags']['currentapp'];
				if ($app != 'home' && $app != 'login' && $app != 'logout')
				{
					$url = $app.'/'.$url;
				}
			}
			
			if($full_scriptname)
			{
				$webserver_url_count = strlen($GLOBALS['phpgw_info']['server']['webserver_url'])-1;
				if(substr($GLOBALS['phpgw_info']['server']['webserver_url'] ,$webserver_url_count,1) != '/' && $url_firstchar != '/')
				{
					$url = $GLOBALS['phpgw_info']['server']['webserver_url'] .'/'. $url;
				}
				else
				{
					$url = $GLOBALS['phpgw_info']['server']['webserver_url'] . $url;
				}
			}

			if(@isset($GLOBALS['phpgw_info']['server']['enforce_ssl']) && $GLOBALS['phpgw_info']['server']['enforce_ssl'] && !$GLOBALS['HTTP_SERVER_VARS']['HTTPS'])
			{
				if(substr($url ,0,4) != 'http')
				{
					$url = 'https://'.$GLOBALS['phpgw_info']['server']['hostname'].$url;
				}
				else
				{
					$url = str_replace ( 'http:', 'https:', $url);
				}
			}

			/* Now we process the extravars into a proper url format */
			/* if its not an array, then we turn it into one */
			/* We do this to help prevent any duplicates from being sent. */
			if (!is_array($extravars) && $extravars != '')
			{
				$a = explode('&', $extravars);
				$i = 0;
				while ($i < count($a))
				{
					$b = split('=', $a[$i]);
					$new_extravars[$b[0]] = $b[1];
					$i++;
				}
				$extravars = $new_extravars;
				unset($new_extravars);
			}

			/* if using frames we make sure there is a framepart */
			if(@defined('PHPGW_USE_FRAMES') && PHPGW_USE_FRAMES)
			{
				if (!isset($extravars['framepart']))
				{
					$extravars['framepart']='body';
				}
			}
			
			/* add session params if not using cookies */
			if (@!$GLOBALS['phpgw_info']['server']['usecookies'])
			{
				$extravars['sessionid'] = $this->sessionid;
				$extravars['kp3'] = $this->kp3;
				$extravars['domain'] = $this->account_domain;
			}

			/* if we end up with any extravars then we generate the url friendly string */
			/* and return the result */
			if (is_array($extravars))
			{
				$new_extravars = '';
				reset($extravars);
				while(list($key,$value) = each($extravars))
				{
					if (!empty($new_extravars))
					{
						$new_extravars .= '&';
					}
					$new_extravars .= $key.'='.htmlentities(urlencode($value));
				}
				return $url .= '?' . $new_extravars;
			}
			/* if no extravars then we return the cleaned up url/scriptname */
			return $url;
		}
	}