<?php
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/*
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Copyright (c) 2007, Till Brehm, projektfarm Gmbh
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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* Neither the name of ISPConfig nor the names of its contributors
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may be used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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class shelluser_base_plugin {
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var $plugin_name = 'shelluser_base_plugin';
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var $class_name = 'shelluser_base_plugin';
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var $min_uid = 499;
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//* This function is called during ispconfig installation to determine
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// if a symlink shall be created for this plugin.
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function onInstall() {
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global $conf;
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if($conf['services']['web'] == true) {
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return true;
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} else {
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return false;
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}
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}
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/*
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This function is called when the plugin is loaded
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*/
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function onLoad() {
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global $app;
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/*
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Register for the events
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*/
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$app->plugins->registerEvent('shell_user_insert',$this->plugin_name,'insert');
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$app->plugins->registerEvent('shell_user_update',$this->plugin_name,'update');
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$app->plugins->registerEvent('shell_user_delete',$this->plugin_name,'delete');
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}
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function insert($event_name,$data) {
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global $app, $conf;
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$app->uses('system');
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if($app->system->is_user($data['new']['puser'])) {
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// Get the UID of the parent user
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$uid = intval($app->system->getuid($data['new']['puser']));
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if($uid > $this->min_uid) {
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$command = 'useradd';
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$command .= ' -d '.escapeshellcmd($data['new']['dir']);
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$command .= ' -g '.escapeshellcmd($data['new']['pgroup']);
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$command .= ' -o '; // non unique
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if($data['new']['password'] != '') $command .= ' -p '.escapeshellcmd($data['new']['password']);
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$command .= ' -s '.escapeshellcmd($data['new']['shell']);
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$command .= ' -u '.escapeshellcmd($uid);
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$command .= ' '.escapeshellcmd($data['new']['username']);
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exec($command);
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$app->log("Executed command: ".$command,LOGLEVEL_DEBUG);
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$app->log("Added shelluser: ".$data['new']['username'],LOGLEVEL_DEBUG);
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// call the ssh-rsa update function
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$app->uses("getconf");
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$this->data = $data;
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$this->app = $app;
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$this->_setup_ssh_rsa();
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//* Create .bash_history file
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touch(escapeshellcmd($data['new']['dir']).'/.bash_history');
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chmod(escapeshellcmd($data['new']['dir']).'/.bash_history', 0755);
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chown(escapeshellcmd($data['new']['dir']).'/.bash_history', escapeshellcmd($data['new']['username']));
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chgrp(escapeshellcmd($data['new']['dir']).'/.bash_history', escapeshellcmd($data['new']['pgroup']));
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//* Disable shell user temporarily if we use jailkit
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if($data['new']['chroot'] == 'jailkit') {
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$command = 'usermod -s /bin/false -L '.escapeshellcmd($data['new']['username']);
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exec($command);
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$app->log("Disabling shelluser temporarily: ".$command,LOGLEVEL_DEBUG);
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}
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} else {
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$app->log("UID = $uid for shelluser:".$data['new']['username']." not allowed.",LOGLEVEL_ERROR);
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}
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} else {
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$app->log("Skipping insertion of user:".$data['new']['username'].", parent user ".$data['new']['puser']." does not exist.",LOGLEVEL_WARN);
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}
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}
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function update($event_name,$data) {
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global $app, $conf;
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$app->uses('system');
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if($app->system->is_user($data['new']['puser'])) {
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// Get the UID of the parent user
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$uid = intval($app->system->getuid($data['new']['puser']));
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if($uid > $this->min_uid) {
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// Check if the user that we want to update exists, if not, we insert it
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if($app->system->is_user($data['old']['username'])) {
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$command = 'usermod';
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$command .= ' --home '.escapeshellcmd($data['new']['dir']);
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$command .= ' --gid '.escapeshellcmd($data['new']['pgroup']);
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// $command .= ' --non-unique ';
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$command .= ' --password '.escapeshellcmd($data['new']['password']);
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if($data['new']['chroot'] != 'jailkit') $command .= ' --shell '.escapeshellcmd($data['new']['shell']);
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// $command .= ' --uid '.escapeshellcmd($uid);
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$command .= ' --login '.escapeshellcmd($data['new']['username']);
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$command .= ' '.escapeshellcmd($data['old']['username']);
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exec($command);
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$app->log("Executed command: $command ",LOGLEVEL_DEBUG);
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$app->log("Updated shelluser: ".$data['old']['username'],LOGLEVEL_DEBUG);
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// call the ssh-rsa update function
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$app->uses("getconf");
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$this->data = $data;
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$this->app = $app;
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$this->_setup_ssh_rsa();
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//* Create .bash_history file
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if(!is_file($data['new']['dir']).'/.bash_history') {
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touch(escapeshellcmd($data['new']['dir']).'/.bash_history');
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chmod(escapeshellcmd($data['new']['dir']).'/.bash_history', 0755);
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chown(escapeshellcmd($data['new']['dir']).'/.bash_history',escapeshellcmd($data['new']['username']));
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chgrp(escapeshellcmd($data['new']['dir']).'/.bash_history',escapeshellcmd($data['new']['pgroup']));
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}
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} else {
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// The user does not exist, so we insert it now
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$this->insert($event_name,$data);
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}
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} else {
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$app->log("UID = $uid for shelluser:".$data['new']['username']." not allowed.",LOGLEVEL_ERROR);
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}
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} else {
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$app->log("Skipping update for user:".$data['new']['username'].", parent user ".$data['new']['puser']." does not exist.",LOGLEVEL_WARN);
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}
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}
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function delete($event_name,$data) {
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global $app, $conf;
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$app->uses('system');
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if($app->system->is_user($data['old']['username'])) {
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// Get the UID of the user
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$userid = intval($app->system->getuid($data['old']['username']));
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if($userid > $this->min_uid) {
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// We delete only non jailkit users, jailkit users will be deleted by the jailkit plugin.
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if ($data['old']['chroot'] != "jailkit") {
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$command = 'userdel -f';
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$command .= ' '.escapeshellcmd($data['old']['username']);
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exec($command);
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$app->log("Deleted shelluser: ".$data['old']['username'],LOGLEVEL_DEBUG);
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}
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} else {
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$app->log("UID = $userid for shelluser:".$data['old']['username']." not allowed.",LOGLEVEL_ERROR);
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}
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} else {
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$app->log("User:".$data['new']['username']." does not exist in in /etc/passwd, skipping delete.",LOGLEVEL_WARN);
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}
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}
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private function _setup_ssh_rsa() {
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$this->app->log("ssh-rsa setup shelluser_base",LOGLEVEL_DEBUG);
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// Get the client ID, username, and the key
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$domain_data = $this->app->db->queryOneRecord('SELECT sys_groupid FROM web_domain WHERE web_domain.domain_id = '.intval($this->data['new']['parent_domain_id']));
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$sys_group_data = $this->app->db->queryOneRecord('SELECT * FROM sys_group WHERE sys_group.groupid = '.intval($domain_data['sys_groupid']));
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$id = intval($sys_group_data['client_id']);
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$username= $sys_group_data['name'];
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$client_data = $this->app->db->queryOneRecord('SELECT * FROM client WHERE client.client_id = '.$id);
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$userkey = $client_data['ssh_rsa'];
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unset($domain_data);
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unset($client_data);
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// ssh-rsa authentication variables
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$sshrsa = escapeshellcmd($this->data['new']['ssh_rsa']);
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$usrdir = escapeshellcmd($this->data['new']['dir']);
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$sshdir = $usrdir.'/.ssh';
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$sshkeys= $usrdir.'/.ssh/authorized_keys';
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// If this user has no key yet, generate a pair
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if ($userkey == '' && $id>0)
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{
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//Generate ssh-rsa-keys
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exec('ssh-keygen -t rsa -C '.$username.'-rsa-key-'.time().' -f /tmp/id_rsa -N ""');
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// save keypair in client table
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$this->app->db->query("UPDATE client SET created_at = ".time().", id_rsa = '".file_get_contents('/tmp/id_rsa')."', ssh_rsa = '".file_get_contents('/tmp/id_rsa.pub')."' WHERE client_id = ".$id);
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// and use the public key that has been generated
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$userkey = file_get_contents('/tmp/id_rsa.pub')
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;
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exec('rm -f /tmp/id_rsa /tmp/id_rsa.pub');
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$this->app->log("ssh-rsa keypair generated for ".$username,LOGLEVEL_DEBUG);
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};
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if (!file_exists($sshkeys))
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{
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// add root's key
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exec("mkdir '$sshdir'");
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exec("cat /root/.ssh/authorized_keys > '$sshkeys'");
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exec("echo '' >> '$sshkeys'");
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// add the user's key
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exec("echo '$userkey' >> '$sshkeys'");
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exec("echo '' >> '$sshkeys'");
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$this->app->log("ssh-rsa authorisation keyfile created in ".$sshkeys,LOGLEVEL_DEBUG);
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}
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if ($sshrsa!=''){
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// add the custom key
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exec("echo '$sshrsa' >> '$sshkeys'");
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exec("echo '' >> '$sshkeys'");
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$this->app->log("ssh-rsa key updated in ".$sshkeys,LOGLEVEL_DEBUG);
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}
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// set proper file permissions
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exec("chown -R ".escapeshellcmd($this->data['new']['puser']).":".escapeshellcmd($this->data['new']['pgroup'])." ".$usrdir);
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exec("chmod 600 '$sshkeys'");
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}
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} // end class
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?>
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