LDAPAccountManager/lam/lib/modules/posixAccount.inc

<?php
/*
$Id$

  This code is part of LDAP Account Manager (http://www.sourceforge.net/projects/lam)
  Copyright (C) 2003  Tilo Lutz

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  This program 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 General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

/* Session variables which are used:
* $_SESSION['cacheAttributes']: This variable contains a list of attributes and their scope which should be cached
*
* Coockie variables which are used:
* $_COOKIE["IV"], $_COOKIE["Key"]: Needed to en/decrypt passwords.
*
* Variables in basearray which are no objects:
* type: Type of account. Can be user, group, host
* attributes: List of all attributes, how to get them and are theiy required or optional
* dn: current DN without uid= or cn=
* dn_orig: old DN if account was loaded with uid= or cn=

* External functions which are used
* account.inc: findgroups, incache, get_cache, array_delete, getshells
* ldap.inc: pwd_is_enabled, pwd_hash
*/

/* This class contains all posixAccount LDAP attributes
* and funtioncs required to deal with posixAccount
* posixAccount can only be created when it should be added
* to an array.
* basearray is the same array posixAccount should be added
* to. If basearray is not given the constructor tries to
* create an array with posixAccount and all other required
* objects.
* Example: $user[] = new posixAccount($user);
*
* In container array the following things have to exist:
* account or inetOrgPerson object
* type: 'user' or 'host'
* 'attributes': this is a list of arrays with all ldap attributes wich are allowed for this account
*/
class posixAccount {
	// Constructor
	function posixAccount($base) {
		/* Return an error if posixAccount should be created without
		* base container
		*/
		if (!$base) trigger_error(_('Please create a base object with $var = new accountContainer();'), E_USER_ERROR);
		if (!is_string($base)) trigger_error(_('Please create a new module object with $accountContainer->add_objectClass(\'posixAccount\');'), E_USER_ERROR);
		$this->base = $base;
		// posixAccount is only a valid objectClass for user and host
		if (!($_SESSION[$this->base]->get_type() == 'user') && !($_SESSION[$this->base]->get_type() == 'host')) trigger_error(_('posixAccount can only be used for users or hosts.'), E_USER_WARNING);
		/* Check if ldap conatiner is in array and set type
		* users are using inetOrgPerson-, hosts account-container
		*/
		if (!isset($_SESSION[$this->base]->module['inetOrgPerson']) && $_SESSION[$this->base]->type=='user') $_SESSION[$this->base]->add_objectClass('inetOrgPerson');
		if (!isset($_SESSION[$this->base]->module['account']) && $_SESSION[$this->base]->type=='host') $_SESSION[$this->base]->add_objectClass('account');
		// Add Array with all attributes and type
		$this->attributes = $_SESSION[$this->base]->get_module_attributes('posixAccount');
		$_SESSION[$this->base]->add_attributes ('posixAccount');

		$this->alias = _('posixAccount');
		$groups = $_SESSION[$_SESSION[$this->base]->cache]->findgroups(); // list of all groupnames
		if (count($groups)==0) trigger_error(_('No groups found in ldap.'), E_USER_WARNING);

		// Make references to attributes which already esists in ldap
		$newattributes = array_keys($this->attributes);
		$module = array_keys($_SESSION[$this->base]->module);
		for ($i=0; $i<count($module); $i++) {
			foreach ($newattributes as $attribute)
				if (isset($_SESSION[$this->base]->module[$module[$i]]->attributes[$attribute])) $this->attributes[$attribute] =& $_SESSION[$this->base]->module[$module[$i]]->attributes[$attribute];
			}
		$this->orig = $this->attributes ;
		$this->attributes['objectClass'][0] = 'posixAccount';
		$this->createhomedir=false;
		}

	// Variables
	// Alias Name. This name is shown in the menu instead of posixAccount
	var $alias;
	// name of accountContainer so we can read other classes in accuontArray
	var $base;
	// Use a unix password?
	var $userPassword_no;
	// Lock account?
	var $userPassword_lock;

	// This variable contains all inetOrgPerson attributes
	var $attributes;
	/* If an account was loaded all attributes are kept in this array
	* to compare it with new changed attributes
	*/
	var $orig;
	/* These two variables keep an array of groups the
	* user is also member of.
	*/
	var $groups;
	var $groups_orig;
	var $createhomedir;

	/* $attribute['userPassword'] can't accessed directly because it's enrcypted
	* To read / write password function userPassword is needed
	* This function will return the unencrypted password when
	* called without a variable
	* If it's called with a new password, the
	* new password will be stored encrypted
	*/
	function userPassword($newpassword=false) {
		if (is_string($newpassword)) {
			// Write new password
			if ($newpassword!='') {
				$iv = base64_decode($_COOKIE["IV"]);
				$key = base64_decode($_COOKIE["Key"]);
				$this->attributes['userPassword'][0] = base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $newpassword, MCRYPT_MODE_ECB, $iv));
				}
			else $this->attributes['userPassword'][0] = '';
			return 0;
			}
		else {
			if ($this->attributes['userPassword'][0]!='') {
				// Read existing password if set
				$iv = base64_decode($_COOKIE["IV"]);
				$key = base64_decode($_COOKIE["Key"]);
				$password = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, base64_decode($this->attributes['userPassword'][0]), MCRYPT_MODE_ECB, $iv);
				$password = str_replace(chr(00), '', $password);
				return $password;
				}
			else return '';
			}
		}

	/* This function returns a list with all required modules
	*/
	function dependencies() {
		if ($_SESSION[$this->base]->type=='user') return array('inetOrgPerson');
		if ($_SESSION[$this->base]->type=='host') return array('account');
		// return error if unsupported type is used
		return -1;
		}

	function module_ready() {
		return true;
		}

	/* Write variables into object and do some regexp checks
	*/
	function proccess_attributes($post) {
		if ($this->orig['uid'][0]!='' && $post['form_posixAccount_uid']!=$this->attributes['uid'][0])
			$errors[] = array('INFO', _('UID'), _('UID has changed. Do you want to change home directory?'));
		if ($this->orig['gidNumber'][0]!='' && $_SESSION[$_SESSION[$this->base]->cache]->getgid($post['form_posixAccount_gidNumber'])!=$this->attributes['gidNumber'][0])
			$errors[] = array('INFO', _('GID number'), sprintf(_('GID number has changed. To keep file ownership you have to run the following command as root: \'find / -gid %s -uid %s -exec chgrp %s {} \;\''), $this->orig['gidNumber'][0], $this->orig['uidNumber'][0], $_SESSION[$_SESSION[$this->base]->cache]->getgid($post['form_posixAccount_gidNumber'])));
		if ($this->orig['uidNumber'][0]!='' && $post['form_posixAccount_uidNumber']!=$this->attributes['uidNumber'][0])
			$errors[] = array('INFO', _('UID number'), sprintf(_('UID number has changed. To keep file ownership you have to run the following command as root: \'find / -uid %s -exec chown %s {} \;\''), $this->orig['uidNumber'][0], $this->attributes['uidNumber'][0]));
		if (isset($post['form_posixAccount_homeDirectory']) && $this->orig['homeDirectory'][0]!='' && $post['form_posixAccount_homeDirectory']!=$this->attributes['homeDirectory'][0])
			$errors[] = array('INFO', _('Home directory'), sprintf(_('Home directory changed. To keep home directory you have to run the following command as root: \'mv %s %s\''), $this->orig['homeDirectory'][0], $this->attributes['homeDirectory'][0]));

		// Load attributes
		$this->attributes['uid'][0] = $post['form_posixAccount_uid'];
		$this->attributes['cn'][0] = $this->attributes['uid'][0];
		$this->attributes['uidNumber'][0] = $post['form_posixAccount_uidNumber'];
		$this->attributes['gidNumber'][0] = $_SESSION[$_SESSION[$this->base]->cache]->getgid($post['form_posixAccount_gidNumber']);
		$this->attributes['homeDirectory'][0] = $post['form_posixAccount_homeDirectory'];
		$this->attributes['loginShell'][0] = $post['form_posixAccount_loginShell'];
		$this->attributes['gecos'][0] = $post['form_posixAccount_gecos'];
		if ($post['form_posixAccount_createhomedir']) $this->createhomedir = true;
			else $this->createhomedir = false;
		if ($post['form_posixAccount_userPassword_no']) $this->userPassword_no=true;
			else $this->userPassword_no=false;
		if ($post['form_posixAccount_userPassword_lock']) $this->userPassword_lock=true;
			else $this->userPassword_lock=false;
		if (isset($post['form_posixAccount_userPassword'])) {
			if ($post['form_posixAccount_userPassword'] != $post['form_posixAccount_userPassword2']) {
				$errors[] = array('ERROR', _('Password'), _('Please enter the same password in both password-fields.'));
				unset ($post['form_posixAccount_userPassword2']);
				}
				else $this->userPassword($post['form_posixAccount_userPassword']);
			}
		if ($post['form_posixAccount_genpass']) $this->userPassword(genpasswd());


		// Check if UID is valid. If none value was entered, the next useable value will be inserted
		// load min and may uidNumber
		if ($_SESSION[$this->base]->type=='user') {
			$minID = intval($_SESSION[$_SESSION[$this->base]->config]->get_minUID());
			$maxID = intval($_SESSION[$_SESSION[$this->base]->config]->get_maxUID());
			}
		if ($_SESSION[$this->base]->type=='host') {
			$minID = intval($_SESSION[$_SESSION[$this->base]->config]->get_minMachine());
			$maxID = intval($_SESSION[$_SESSION[$this->base]->config]->get_maxMachine());
			}
		$dn_uids = $_SESSION[$_SESSION[$this->base]->cache]->get_cache('uidNumber', 'posixAccount', '*');
		// get_cache will return an array ( dn1 => array(uidnumber1), dn2 => array(uidnumber2), ... )
		foreach ($dn_uids as $uid) $uids[] = $uid[0];
		if(is_array($uids)) sort ($uids, SORT_NUMERIC);
		if ($this->attributes['uidNumber'][0]=='') {
			// No id-number given
			if ($this->orig['uidNumber'][0]=='') {
				// new account -> we have to find a free id-number
				if (count($uids)!=0) {
					// There are some uids
					// Store highest id-number
					$id = $uids[count($uids)-1];
					// Return minimum allowed id-number if all found id-numbers are too low
					if ($id < $minID) $this->attributes['uidNumber'][0] = $minID;
					// Return higesht used id-number + 1 if it's still in valid range
					if ($id < $maxID) $this->attributes['uidNumber'][0] = $id+1;
					/* If this function is still running we have to fid a free id-number between
					* the used id-numbers
					*/
					$i = intval($minID);
					while (in_array($i, $uids)) $i++;
					if ($i>$maxID)
						$errors[] = array('ERROR', _('ID-Number'), _('No free ID-Number!'));
						else {
							$this->attributes['uidNumber'][0] = $i;
							$errors[] = array('WARN', _('ID-Number'), _('It is possible that this ID-number is reused. This can cause several problems because files with old permissions might still exist. To avoid this warning set maxUID to a higher value.'));
							}
					}
				else $this->attributes['uidNumber'][0] = $minID;
				// return minimum allowed id-number if no id-numbers are found
				}
			else $this->attributes['uidNumber'][0] = $this->orig['uidNumber'][0];
			// old account -> return id-number which has been used
			}
		else {
			// Check manual ID
			// id-number is out of valid range
			if ( ($this->attributes['uidNumber'][0]!=$post['form_posixAccount_uidNumber']) && ($this->attributes['uidNumber'][0] < $minID || $this->attributes['uidNumber'][0] > $maxID)) $errors[] = array('ERROR', _('ID-Number'), sprintf(_('Please enter a value between %s and %s!'), $minID, $maxID));
			// $uids is allways an array but not if no entries were found
			if (is_array($uids)) {
				// id-number is in use and account is a new account
				if ((in_array($this->attributes['uidNumber'][0], $uids)) && $this->orig['uidNumber'][0]=='') $errors[] = array('ERROR', _('ID-Number'), _('ID is already in use'));
				// id-number is in use, account is existing account and id-number is not used by itself
				if ((in_array($this->attributes['uidNumber'][0], $uids)) && $this->orig['uidNumber'][0]!='' && ($this->orig['uidNumber'][0] != $this->attributes['uidNumber'][0]) ) {
					$errors[] = array('ERROR', _('ID-Number'), _('ID is already in use'));
					$this->attributes['uidNumber'][0] = $this->orig['uidNumber'][0];
					}
				}
			}

		if ($_SESSION[$this->base]->type=='user') {
			if (($this->attributes['uid'][0] != $post['form_posixAccount_uid']) &&  ereg('[A-Z]$', $post['form_posixAccount_uid']))
				$errors[] = array('WARN', _('Username'), _('You are using a capital letters. This can cause problems because windows isn\'t case-sensitive.'));
			// Check if Homedir is valid
			$this->attributes['homeDirectory'][0] = str_replace('$group', $_SESSION[$_SESSION[$this->base]->cache]->getgrnam($this->attributes['gidNumber'][0]), $this->attributes['homeDirectory'][0]);
			if ($this->attributes['uid'][0] != '')
				$this->attributes['homeDirectory'][0] = str_replace('$user', $this->attributes['uid'][0], $this->attributes['homeDirectory'][0]);
			if ($this->attributes['homeDirectory'][0] != $post['form_posixAccount_homeDirectory']) $errors[] = array('INFO', _('Home directory'), _('Replaced $user or $group in homedir.'));
			if ( !ereg('^[/]([a-z]|[A-Z])([a-z]|[A-Z]|[0-9]|[.]|[-]|[_])*([/]([a-z]|[A-Z])([a-z]|[A-Z]|[0-9]|[.]|[-]|[_])*)*$', $this->attributes['homeDirectory'][0] ))
				$errors[] = array('ERROR', _('Home directory'), _('Homedirectory contains invalid characters.'));
			// Check if Username contains only valid characters
			if ( !ereg('^([a-z]|[A-Z]|[0-9]|[.]|[-]|[_])+$', $this->attributes['uid'][0]))
				$errors[] = array('ERROR', _('Username'), _('Username contains invalid characters. Valid characters are: a-z, A-Z, 0-9 and .-_ !'));
			}

		if ($_SESSION[$this->base]->type=='host') {
			if (($this->attributes['uid'][0] != $post['form_account_uid']) &&  ereg('[A-Z]$', $post['form_account_uid']))
				$errors[] = array('WARN', _('Hostname'), _('You are using a capital letters. This can cause problems because windows isn\'t case-sensitive.'));
			// Check if Username contains only valid characters
			if ( !ereg('^([a-z]|[A-Z]|[0-9]|[.]|[-]|[_])+[$]$', $this->attributes['uid'][0]))
				$errors[] = array('ERROR', _('Hostname'), _('Hostname contains invalid characters. Valid characters are: a-z, A-Z, 0-9 and .-_ ! Hostname must end with $ !'));
			}

		// Create automatic useraccount with number if original user already exists
		// Reset name to original name if new name is in use
		// Set username back to original name if new username is in use
		if ($_SESSION[$_SESSION[$this->base]->cache]->in_cache($this->attributes['uid'][0],'uid', '*')!=false && ($this->orig['uid'][0]!='')) {
			$this->attributes['uid'][0] = $this->orig['uid'][0];
			}
		// Change uid to a new uid until a free uid is found
		else while ($_SESSION[$_SESSION[$this->base]->cache]->in_cache($this->attributes['uid'][0], 'uid', '*')) {
			if ($_SESSION[$this->base]->type=='host') $this->attributes['uid'][0] = substr($this->attributes['uid'][0], 0, -1);
				// get last character of username
			$lastchar = substr($this->attributes['uid'][0], strlen($this->attributes['uid'][0])-1, 1);
			// Last character is no number
			if ( !ereg('^([0-9])+$', $lastchar))
				/* Last character is no number. Therefore we only have to
				* add "2" to it.
				*/
				if ($_SESSION[$this->base]->type=='host') $this->attributes['uid'][0] = $this->attributes['uid'][0] . '2$';
					else $this->attributes['uid'][0] = $this->attributes['uid'][0] . '2';
			 else {
				/* Last character is a number -> we have to increase the number until we've
				* found a groupname with trailing number which is not in use.
				*
				* $i will show us were we have to split groupname so we get a part
				* with the groupname and a part with the trailing number
				*/
				$i=strlen($this->attributes['uid'][0])-1;
				$mark = false;
				// Set $i to the last character which is a number in $account_new->general_username
				while (!$mark) {
					if (ereg('^([0-9])+$',substr($this->attributes['uid'][0], $i, strlen($this->attributes['uid'][0])-$i))) $i--;
						else $mark=true;
					}
				// increase last number with one
				$firstchars = substr($this->attributes['uid'][0], 0, $i+1);
				$lastchars = substr($this->attributes['uid'][0], $i+1, strlen($this->attributes['uid'][0])-$i);
				// Put username together
				if ($_SESSION[$this->base]->type=='host') $this->attributes['uid'][0] = $firstchars . (intval($lastchars)+1)."$";
					else $this->attributes['uid'][0] = $firstchars . (intval($lastchars)+1);
				}
			}

		// Show warning if lam has changed username
		if ($_SESSION[$this->base]->type=='user')
			if ($this->attributes['uid'][0] != $post['form_posixAccount_uid']) {
				$errors[] = array('WARN', _('Username'), _('Username in use. Selected next free username.'));
				}
		if ($_SESSION[$this->base]->type=='host')
			if ($this->attributes['uid'][0] != $post['form_posixAccount_uid']) {
				$errors[] = array('WARN', _('Hostname'), _('Hostname in use. Selected next free hostname.'));
				}

		if (!ereg('^([a-z]|[A-Z]|[0-9]|[\|]|[\#]|[\*]|[\,]|[\.]|[\;]|[\:]|[\_]|[\-]|[\+]|[\!]|[\%]|[\&]|[\/]|[\?]|[\{]|[\[]|[\(]|[\)]|[\]]|[\}])*$', $this->userPassword()))
			$errors[] = array('ERROR', _('Password'), _('Password contains invalid characters. Valid characters are: a-z, A-Z, 0-9 and #*,.;:_-+!$%&/|?{[()]}= !'));
		// Return error-messages
		if (is_array($errors)) return $errors;
		// Go to additional group page when no error did ocour and button was pressed
		if ($post['form_posixAccount_addgroup'])  return 'group';
		return 0;
		}

	/* Write variables into object and do some regexp checks
	*/
	function proccess_group($post) {
		do { // X-Or, only one if() can be true
			if (isset($post['form_posixAccount_addgroups']) && isset($post['form_posixAccount_addgroups_button'])) { // Add groups to list
				// Add new group
				$this->groups = @array_merge($this->groups, $post['form_posixAccount_addgroups']);
				// sort groups
				sort($this->groups);
				break;
				}
			if (isset($post['form_posixAccount_removegroups']) && isset($post['form_posixAccount_removegroups_button'])) { // remove groups from list
				$this->groups = array_delete($post['form_posixAccount_removegroups'], $this->groups);
				break;
				}
			} while(0);
		if (isset($post['form_posixAccount_addgroups_button']) || isset($post['form_posixAccount_removegroups_button'])) return 'group';
		if ($post['form_posixAccount_toattributes']) return 'attributes';
		return 0;
		}


	/* This function loads all attributes into the object
	* $attr is an array as it's retured from ldap_get_attributes
	*/
	function load_attributes($attr) {
		// Load attributes which are displayed
		// unset count entries
		unset ($attr['count']);
		$attributes = array_keys($attr);
		foreach ($attributes as $attribute) unset ($attr[$attribute]['count']);
		// unset double entries
		for ($i=0; $i<count($attr); $i++)
			if (isset($attr[$i])) unset($attr[$i]);
		foreach ($attributes as $attribute) {
			if (isset($this->attributes[$attribute])) {
				// decode as unicode
				$this->attributes[$attribute] = $attr[$attribute];
				for ($i=0; $i<count($this->attributes[$attribute]); $i++) $this->attributes[$attribute][$i] = utf8_decode ($this->attributes[$attribute][$i]);
				}
			}
		// Values are kept as copy so we can compare old attributes with new attributes
		$this->attributes['objectClass'][0] = 'posixAccount';
		$this->orig = $this->attributes;

		// get all additional groupmemberships
		$dn_groups = $_SESSION[$_SESSION[$this->base]->cache]->get_cache('memberUid', 'posixGroup', 'group');
		$DNs = array_keys($dn_groups);
		foreach ($DNs as $DN) {
			if (in_array($attr['uid'][0], $dn_groups[$DN])) {
				$this->groups[] = substr($DN, 3, strpos($DN, ',')-3);
				}
			}
		$this->groups_orig = $this->groups;
		return 0;
		}



	/* This function returns an array with 3 entries:
	* array( DN1 ('add' => array($attr), 'remove' => array($attr), 'modify' => array($attr)), DN2 .... )
	* DN is the DN to change. It may be possible to change several DNs,
	* e.g. create a new user and add him to some groups via attribute memberUid
	* add are attributes which have to be added to ldap entry
	* remove are attributes which have to be removed from ldap entry
	* modify are attributes which have to been modified in ldap entry
	*/
	function save_attributes() {
		$return = $_SESSION[$this->base]->save_module_attributes($this->attributes, $this->orig);

		if (isset($return[$_SESSION[$this->base]->dn]['modify']['userPassword']))
			unset($return[$_SESSION[$this->base]->dn]['modify']['userPassword']);
		// Set unix password
		if (count($this->orig['userPassword'])==0) {
			// New user or no old password set
			if ($this->userPassword_no) {
				$return[$_SESSION[$this->base]->dn]['modify']['userPassword'][0] = pwd_hash ('', !$this->userPassword_lock);
				}
				else $return[$_SESSION[$this->base]->dn]['modify']['userPassword'][0] = utf8_encode(pwd_hash ($this->userPassword(), !$this->userPassword_lock));
			}
		else {
			if (($this->attributes['userPassword'][0] != $this->orig['userPassword'][0] && $this->userPassword()!='' ) || $this->userPassword_no) {
				// Write new password
				if ($this->userPassword_no) $return[$_SESSION[$this->base]->dn]['modify']['userPassword'][0] = pwd_hash ('', !$this->userPassword_lock);
					else $return[$_SESSION[$this->base]->dn]['modify']['userPassword'][0] = utf8_encode(pwd_hash ($this->userPassword(), !$this->userPassword_lock));
				}
			else { // No new password but old password
				// (un)lock password
				if ($this->userPassword_lock == pwd_is_enabled($this->orig['userPassword'][0])) {
					// Split old password hash in {CRYPT} and password-hash
					$i = 0;
					while ($this->orig['userPassword'][0]{$i} != '}') $i++;
					$passwd = substr($this->orig['userPassword'][0], $i+1 );
					$crypt = substr($this->orig['userPassword'][0], 0, $i+1 );
					// remove trailing ! from password hash
					if ($passwd{0} == '!') $passwd = substr($passwd, 1);
					// Write new password
					if ($this->userPassword_lock) $return[$_SESSION[$this->base]->dn]['modify']['userPassword'][0] = utf8_encode("$crypt!$passwd");
					else $return[$_SESSION[$this->base]->dn]['modify']['userPassword'][0] = utf8_encode("$crypt$passwd");
					}
				}
			}

		// Remove primary group from additional groups
		for ($i=0; $i<count($this->groups); $i++) {
			if ($this->groups[$i]==$_SESSION[$_SESSION[$this->base]->cache]->getgrnam($this->attributes['gidNumber'])) unset($this->groups[$i]);
			}

		// Set additional group memberships
		if ($this->orig['uid'][0]!='' && $this->attributes['uid'][0]!=$this->orig['uid'][0]) {
			// remove old memberships
			$dn_groups = $_SESSION[$_SESSION[$this->base]->cache]->get_cache('memberUid', 'posixGroup', 'group');
			$DNs = array_keys($dn_groups);
			foreach ($DNs as $DN)
				if (in_array($this->orig['uid'][0], $dn_groups[$DN]))
					$return[$DN]['remove']['memberUid'][0] = $this->orig['uid'][0];
			// Add new memberships
			if (is_array($this->groups))
				foreach ($this->groups as $group) {
					$dn = $_SESSION[$_SESSION[$this->base]->ldap]->in_cache ($group, 'cn', 'group');
					$return[$dn]['add']['memberUid'][0] = $this->attributes['uid'][0];
					}
			}
		else {
			if (is_array($this->groups)) {
				// There are some additional groups defined
				if (is_array($this->groups_orig)) {
					//There are some old groups.
					$add = array_delete($this->groups_orig, $this->groups);
					$remove = array_delete($this->groups, $this->groups_orig);
					$dn_cns = $_SESSION[$_SESSION[$this->base]->cache]->get_cache('cn', 'posixGroup', 'group');
					// get_cache will return an array ( dn1 => array(cn1), dn2 => array(cn2), ... )
					$DNs = array_keys($dn_cns);
					foreach ($DNs as $DN) {
						if (is_array($add))
							if (in_array($dn_cns[$DN][0], $add)) $return[$DN]['add']['memberUid'] = $this->attributes['uid'];
						if (is_array($remove))
							if (in_array($dn_cns[$DN][0], $remove)) $return[$DN]['remove']['memberUid'] = $this->attributes['uid'];
						}
					// primary group mut also be removed if it has changed after setting additional groups
					if (in_array($_SESSION[$_SESSION[$this->base]->cache]->getgrnam($this->attributes['gidNumber']), $this->groups_orig)) $return[$DN]['remove']['memberUid'] = $this->attributes['uid'];
					}
				else {
					// Add user to every group
					$dn_cns = $_SESSION[$_SESSION[$this->base]->cache]->get_cache('cn', 'posixGroup', 'group');
					// get_cache will return an array ( dn1 => array(cn1), dn2 => array(cn2), ... )
					$DNs = array_keys($dn_cns);
					foreach ($DNs as $DN) {
						if (in_array($dn_cns[$DN][0], $this->groups)) $return[$DN]['add']['memberUid'] = $this->attributes['uid'];
						}
					}
				}
			else {
				if (is_array($this->groups_orig)) {
					//There are some old groups which have to be removed
					$dn_cns = $_SESSION[$_SESSION[$this->base]->cache]->get_cache('cn', 'posixGroup', 'group');
					// get_cache will return an array ( dn1 => array(cn1), dn2 => array(cn2), ... )
					$DNs = array_keys($dn_cns);
					foreach ($DNs as $DN) {
						if (in_array($dn_cns[$DN][0], $this->orig['groups'])) $return[$DN]['remove']['memberUid'] = $this->attributes['uid'];
						}
					}
				}
			}

		if ($this->createhomedir) $return[$_SESSION[$this->base]->dn]['lamdaemon']['command'][] = $this->attributes['uid'][0] . " home add";
		return $return;
		}


	function delete_attributes() {

		}


	/* This function returns all ldap attributes
	* which are part of posixAccount and returns
	* also their values.
	*/
	function get_attributes() {
		$return = $this->attributes;
		$return['userPassword'] = $this->userPassword();
		return $return;
		}

	/* This function will create the html-page
	* to show a page with all attributes.
	* It will output a complete html-table
	*/
	function display_html_attributes($post) {
		$groups = $_SESSION[$_SESSION[$this->base]->cache]->findgroups(); // list of all groupnames
		$shelllist = getshells(); // list of all valid shells
		if ($this->attributes['userPassword'][0] != $this->orig['userPassword'][0]) $password=$this->userPassword();
			else $password='';
		echo "<table border=0 width=\"100%\">\n";
		echo "<tr>\n";
		echo '<td>' . _('Username') . "*</td>\n";
		echo "<td><input name=\"form_posixAccount_uid\" type=\"text\" size=\"20\" maxlength=\"20\" value=\"".$this->attributes['uid'][0]."\"></td>\n";
		echo "<td><a href=\"../help.php?HelpNumber=400\" target=\"lamhelp\">" . _('Help') . "</a></td>\n";
		echo "</tr>\n";
		echo "<tr>\n";
		echo "<td>" . _('UID number') ."</td>\n";
		echo "<td><input name=\"form_posixAccount_uidNumber\" type=\"text\" size=\"6\" maxlength=\"6\" value=\"".$this->attributes['uidNumber'][0]."\"></td>\n";
		echo "<td><a href=\"../help.php?HelpNumber=401\" target=\"lamhelp\">" . _('Help') . "</a></td>\n";
		echo "</tr>\n";
		echo "<tr>\n";
		echo "<td>" . _('Gecos') . "</td>\n";
		echo "<td><input name=\"form_posixAccount_gecos\" type=\"text\" size=\"30\" maxlength=\"255\" value=\"".$this->attributes['gecos'][0]."\"></td>\n";
		echo "<td><a href=\"../help.php?HelpNumber=404\" target=\"lamhelp\">" . _('Help') . "</a></td>\n";
		echo "</tr>\n";
		echo "<tr>\n";
		echo "<td>" . _('Primary group') . "*</td>\n";
		echo "<td><select name=\"form_posixAccount_gidNumber\">";
		// loop trough existing groups
		foreach ($groups as $group)
			if ($_SESSION[$_SESSION[$this->base]->cache]->getgrnam($this->attributes['gidNumber'][0]) == $group) echo "<option selected> $group </option>\n";
				else echo "<option> $group </option>\n";
		echo "</select></td>\n";
		echo "<td><a href=\"../help.php?HelpNumber=406\" target=\"lamhelp\">" . _('Help') . "</a></td>\n";
		echo "</tr>\n";
		if ($_SESSION[$this->base]->type=='user') {
			echo "<tr>\n";
			echo "<td>" . _('Additional groups') . "</td>\n";
			echo "<td><input name=\"form_posixAccount_addgroup\" type=\"submit\" value=\"" . _('Edit groups') . "\"></td>\n";
			echo "<td><a href=\"../help.php?HelpNumber=402\" target=\"lamhelp\">" . _('Help') . "</a></td>\n";
			echo "</tr>\n";
			echo "<tr>\n";
			echo "<td>" . _('Home directory') . "*</td>\n";
			echo "<td><input name=\"form_posixAccount_homeDirectory\" type=\"text\" size=\"30\" maxlength=\"255\" value=\"".$this->attributes['homeDirectory'][0]."\"></td>\n";
			echo "<td><a href=\"../help.php?HelpNumber=403\" target=\"lamhelp\">" . _('Help') . "</a></td>\n";
			echo "</tr>\n";
			if ($this->orig['homeDirectory']=='' && isset($_SESSION[$_SESSION[$this->base]->config]->scriptPath)) {
				echo "<tr>\n";
				echo "<td>" . _('Create home directory') . "*</td>\n";
				echo "<td><input name=\"form_posixAccount_createhomedir\" type=\"checkbox\"";
					if ($this->createhomedir) echo " checked ";
					echo "></td>\n";
				echo "<tr>\n";
				}
			echo "<tr>\n";
			echo "<td>" . _('Password') . "</td>\n";
			echo "<td><input name=\"form_posixAccount_userPassword\" type=\"password\" size=\"20\" maxlength=\"20\" value=\"$password\"></td>\n";
			echo "<td><input name=\"form_posixAccount_genpass\" type=\"submit\" value=\"" . _('Generate password') . "\"></td>\n";
			echo "</tr>\n";
			echo "<tr>\n";
			echo "<td>" . _('Repeat password') . "</td>\n";
			echo "<td><input name=\"form_posixAccount_userPassword2\" type=\"password\" size=\"20\" maxlength=\"20\" value=\"";
				if ($post['form_posixAccount_userPassword2']!='') echo $post['form_posixAccount_userPassword2'];
				else echo $password;
			echo "\"></td>\n";
			echo "<td></td>\n";
			echo "</tr>\n";
			echo "<tr>\n";
			echo "<td>" . _('Use no password') . "</td>\n";
			echo "<td><input name=\"form_posixAccount_userPassword_no\" type=\"checkbox\"";
				if ($this->userPassword_no) echo " checked ";
				echo "></td>\n";
			echo "<td><a href=\"../help.php?HelpNumber=426\" target=\"lamhelp\">" . _('Help') . "</a></td>\n";
			echo "</tr>\n";
			echo "<tr>\n";
			echo "<td>" . _('Lock password') . "</td>\n";
			echo "<td><input name=\"form_posixAccount_userPassword_lock\" type=\"checkbox\"";
				if ($this->userPassword_lock) echo " checked ";
				echo "></td>\n";
			echo "<td><a href=\"../help.php?HelpNumber=426\" target=\"lamhelp\">" . _('Help') . "</a></td>\n";
			echo "</tr>\n";
			if (count($shelllist)!=0) {
				echo "<tr>\n";
				echo "<td>" . _('Login shell') . "*</td>\n";
				echo "<td><select name=\"form_posixAccount_loginShell\">";
				// loop through shells
				foreach ($shelllist as $shell)
					if ($this->attributes['loginShell'][0]==trim($shell)) echo "<option selected> $shell </option>\n";
							else echo "<option> $shell </option>\n";
				echo "</select></td>\n";
				echo "<td><a href=\"../help.php?HelpNumber=405\" target=\"lamhelp\">" . _('Help') . "</a></td>\n";
				echo "</tr>\n";
				}
			}
		echo "</table>\n";
		return 0;
		}

	function display_html_group($post) {
		// load list with all groups
		$dn_groups = $_SESSION[$_SESSION[$this->base]->cache]->get_cache('gidNumber', 'posixGroup', 'group');
		$DNs = array_keys($dn_groups);
		foreach ($DNs as $DN)
			$groups[] = substr($DN, 3, strpos($DN, ',')-3);
		// sort groups
		sort($groups, SORT_STRING);
		// remove groups the user is member of from grouplist
		$groups = array_delete($this->groups, $groups);
		// Remove primary group from grouplist
		$groups = array_flip($groups);
		if (isset($groups[$_SESSION[$_SESSION[$this->base]->cache]->getgrnam($this->attributes['gidNumber'])])) unset ($groups[$_SESSION[$_SESSION[$this->base]->cache]->getgrnam($this->attributes['gidNumber'])]);
		$groups = array_flip($groups);
		echo "<table border=0 width=\"100%\">\n<tr>\n";
		echo "<td><fieldset class=\"".$_SESSION[$this->base]->type."edit-bright\">";
			echo "<legend class=\"".$_SESSION[$this->base]->type."edit-bright\"><b>" . _("Additional groups") . "</b></legend>\n";
			echo "<table border=0 width=\"100%\">\n<tr>\n";
				echo "<td valign=\"top\">";
				echo "<fieldset class=\"".$_SESSION[$this->base]->type."edit-bright\">";
				echo "<legend class=\"".$_SESSION[$this->base]->type."edit-bright\">" . _("Selected groups") . "</legend>\n";
					// Show all groups the user is additional member of
					if (count($this->groups)!=0) {
						echo "<select name=\"form_posixAccount_removegroups[]\" class=\"".$_SESSION[$this->base]->type."edit-bright\" size=15 multiple>\n";
						for ($i=0; $i<count($this->groups); $i++)
							echo "<option>" . $this->groups[$i] . "</option>\n";
						echo "</select>\n";
						}
					echo "</fieldset></td>\n";
				echo "<td align=\"center\" width=\"10%\"><input type=\"submit\" name=\"form_posixAccount_addgroups_button\" value=\"<=\">";
				echo " ";
				echo "<input type=\"submit\" name=\"form_posixAccount_removegroups_button\" value=\"=>\"><br><br>";
				echo "<a href=\""."../help.php?HelpNumber=402\" target=\"lamhelp\">"._('Help')."</a></td>\n";
				echo "<td valign=\"top\">\n";
				echo "<fieldset class=\"".$_SESSION[$this->base]->type."edit-bright\">";
				echo "<legend class=\"".$_SESSION[$this->base]->type."edit-bright\">" . _('Available groups') . "</legend>\n";
					// show all groups expect these the user is member of
					if (count($groups)!=0) {
						echo "<select name=\"form_posixAccount_addgroups[]\" size=15 multiple class=\"".$_SESSION[$this->base]->type."edit-bright\">\n";
						for ($i=0; $i<count($groups); $i++)
							echo "<option> $groups[$i] </option>\n";
						echo "</select>\n";
						}
					echo "</fieldset></td>\n";
				echo "</tr>\n";
				echo "</table>\n";
			echo "<input name=\"form_posixAccount_toattributes\" type=\"submit\" value=\""; echo _('Back'); echo "\">\n";
			echo "</fieldset>\n";
		echo "</td></tr></table>\n";
		return 0;
		}


	}



?>