source: extensions/Ldap_Login/class.ldap.php @ 28534

<?php
global $conf;
class Ldap {
        var $cnx;
        var $config;

        // for debug
        public function write_log($message){
                @file_put_contents('/var/log/ldap_login.log',$message."\n",FILE_APPEND);
        }

        /**
         * check ldap configuration
         *
         * Dans le cas ou l'acces au ldap est anonyme il faut impérativement faire une recherche
         * pour tester la connection.
         *
         * When OpenLDAP 2.x.x is used, ldap_connect() will always return a resource as it does not actually connect
         * but just initializes the connecting parameters. The actual connect happens with the next calls
         * to ldap_* funcs, usually with ldap_bind().
         */
        public function check_ldap(){

                if (!$this->ldap_conn()) {
                        return $this->getErrorString();
                }

                // test du compte root si renseigné
                if (!empty($this->config['ld_binddn']) && !empty($this->config['ld_bindpw'])){ // if empty ld_binddn, anonymous search
                        // authentication with rootdn and rootpw for search
                        if (!$this->ldap_bind_as($this->config['ld_binddn'],$this->config['ld_bindpw'])){
                                return $this->getErrorString();
                        }
                } else {
                        // sinon recherche du basedn (cf comportement ldap_connect avec OpenLDAP)
                        if (!$this->ldap_check_basedn()){ // search userdn
                                return $this->getErrorString();
                        }
                }
                return true;
        }
        
        public function load_default_config()
        {
                $this->config['host'] = 'localhost';
                $this->config['basedn'] = 'dc=example,dc=com'; // racine !
                $this->config['usersbranch'] = 'ou=people';
                $this->config['groupbranch'] = 'ou=group';
                $this->config['ld_search_users'] = False;
                $this->config['ld_search_groups'] = False;
                $this->config['port'] = ''; // if port is empty, I count on the software to care of it !
                $this->config['ld_attr'] = 'uid';
                $this->config['ld_group'] = 'cn';
                //$this->config['ld_class'] = 'posixAccount';
                $this->config['ld_use_ssl'] = False;
                $this->config['ld_bindpw'] ='';
                $this->config['ld_binddn'] ='';
                $this->config['allow_newusers'] = False;
                $this->config['advertise_admin_new_ldapuser'] = False;
                $this->config['send_password_by_mail_ldap'] = False;
                
                $this->config['users_group'] = False;
                $this->config['webmasters_group'] = False;
                $this->config['admins_group'] = False;
        }
        
        function load_config() {
                $this->load_default_config();
                
                // after the default, we can load the actual conf. That way, no holes !
                $conf_file = @file_get_contents( LDAP_LOGIN_PATH.'data.dat' );
                if ($conf_file!==false)
                {
                        $this->config = unserialize($conf_file);
                        $this->config['full_usersbranch'] = $this->config['usersbranch'].','.$this->config['basedn'];
                        $this->config['full_groupbranch'] = $this->config['groupbranch'].','.$this->config['basedn'];
                }
        }

        function save_config()
        {
                $file = fopen( LDAP_LOGIN_PATH.'/data.dat', 'w' );
                fwrite($file, serialize($this->config) );
                fclose( $file );
        }

        function ldap_admin_menu($menu)
        {
                array_push($menu,
                array(
                'NAME' => 'Ldap Login',
                'URL' => get_admin_plugin_menu_link(LDAP_LOGIN_PATH.'/admin.php') )
                );
                return $menu;
        }

        public function ldap_conn(){
                if ($this->config['ld_use_ssl'] == 1){
                        if (empty($this->config['port'])){
                                $this->config['uri'] = 'ldaps://'.$this->config['host'];
                        }
                        else {
                        $this->config['uri'] = 'ldaps://'.$this->config['host'].':'.$this->config['port'];
                        }
                }
                
                // now, it's without ssl
                else {
                        if (empty($this->config['port'])){
                                $this->config['uri'] = 'ldap://'.$this->config['host'];
                        }
                        else {
                                $this->config['uri'] = 'ldap://'.$this->config['host'].':'.$this->config['port'];
                        }
                }

                // first, we initializes connection to ldap
                if ($this->cnx = @ldap_connect($this->config['uri'])){
                                @ldap_set_option($this->cnx, LDAP_OPT_PROTOCOL_VERSION, 3); // LDAPv3 if possible
                
                        // then we authenticate if anonymous search is forbidden
                        if (!empty($obj->config['ld_binddn']) && !empty($obj->config['ld_bindpw'])){
                                if (@ldap_bind($this->cnx,$this->config['ld_binddn'],$this->config['ld_bindpw'])){
                                        return true;
                                }
                                else { return false; }
                        }
                        // if anonymous search is allowed, we still need a fake auth using ldap_bind
                        else {
                                if (@ldap_bind($this->cnx)){
                                        return true;
                                }
                                else { return false; }
                        }
                }
                else { return false; }
        }

        // return ldap error
        public function getErrorString(){
                return ldap_err2str(ldap_errno($this->cnx));
        }
        
        // return the name ldap understand
        public function ldap_name($name){
                if ($this->config['ld_search_users']) {
                        return $this->ldap_search_dn($name);
                }
                else { return $this->config['ld_attr'].'='.$name.','.$this->config['full_usersbranch']; }
        }
        
        public function ldap_group($groupname){
                // this should return an array, even if it's only one !
                if ($this->config['ld_search_groups']) {
                        return $this->ldap_search_group($groupname);
                }
                else {
                $result[] = $this->config['ld_group'].'='.$groupname.','.$this->config['full_groupbranch'];
                return $result;
                }
        }

        // authentication
        public function ldap_bind_as($user,$user_passwd){
                if (@ldap_bind($this->cnx,$this->ldap_name($user),$user_passwd)){
                        return true;
                }
                return false;
        }

        public function ldap_mail($name){
                $sr=@ldap_read($this->cnx, $this->ldap_name($name), "(objectclass=*)", array('mail'));
                $entry = @ldap_get_entries($this->cnx, $sr);
                
                if (!empty($entry[0]['mail'])) {
                        return $entry[0]['mail'][0];
                        }
                return False;
        }
        
        public function ldap_search_group($to_search){
                $ld_group = $this->config['ld_group'];
                
                $sr=@ldap_search($this->cnx, $this->config['full_groupbranch'], "($ld_group=$to_search)", array('dn'),0,0);
                $groups = @ldap_get_entries($this->cnx, $sr);
                $result = array();
                foreach ($groups as $group) {
                        $result[] = $group['dn'];
                }
                return $result;
        }
        
        public function ldap_search_dn($to_search){
                $ld_attr = $this->config['ld_attr'];
                
                $sr=@ldap_search($this->cnx, $this->config['full_usersbranch'], "($ld_attr=$to_search)", array('dn','mail'),0,0);
                $entry = @ldap_get_entries($this->cnx, $sr);
                
                if (!empty($entry[0]['dn'])) {
                        return $entry[0]['dn'];
                        }
                else { return False; }
        }
        
        public function user_membership($user, $groups){
                // $groups is an array of groupdn ! (there is a possibility of several groups, we search the user in each of them).
                foreach ($groups as $groupdn) {
                        $filter = '(objectClass=*)';
                        $result = @ldap_read($this->cnx,$groupdn,$filter,array('memberUid'));
                        $result2 = @ldap_get_entries($this->cnx, $result);
                        if(isset($result2[0]['memberuid'])){
                                foreach($result2[0]['memberuid'] as $item){
                                        if ($item == $user){
                                                return True;
                                        }
                                }
                        }
                }
                return False;
        }
        
        public function ldap_status($username){
                if ($this->config['webmasters_group']) {
                        if ($this->user_membership($username,$this->ldap_group($this->config['webmasters_group']))) {
                                // set status to webmaster and quit (more powerfull, no need to get further)
                                return 'webmaster';
                        }
                }
                if ($this->config['admins_group']) {
                        if ($this->user_membership($username,$this->ldap_group($this->config['admins_group']))) {
                                // set status to admin
                                return 'admin';
                        }
                }
                else 
                {
                return 'normal';
                }
        }
        
        public function getAttr(){
        $search = @ldap_read($this->cnx, "cn=subschema", "(objectClass=*)", array('*', 'subschemasubentry'));
        $entries = @ldap_get_entries($this->cnx, $search);
        }
        
        public function getRootDse(){

        $search = @ldap_read($this->cnx, NULL, 'objectClass=*', array("*", "+"));
        $entries = @ldap_get_entries($this->cnx, $search);
        return $entries[0];
        }

        public function ldap_check_basedn(){
                if ($read = @ldap_read($this->cnx,$this->config['basedn'],'(objectClass=*)',array('dn'))){
                        $entry = @ldap_get_entries($this->cnx, $read);
                        if (!empty($entry[0]['dn'])) {
                                return true;
                        }
                }
                return false;
        }

}
?>