<?php
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/*
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Copyright (c) 2007, Till Brehm, projektfarm Gmbh
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Modified 2009, Marius Cramer, pixcept KG
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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 cron_jailkit_plugin {
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//* $plugin_name and $class_name have to be the same then the name of this class
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var $plugin_name = 'cron_jailkit_plugin';
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var $class_name = 'cron_jailkit_plugin';
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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('cron_insert', $this->plugin_name, 'insert');
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$app->plugins->registerEvent('cron_update', $this->plugin_name, 'update');
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$app->plugins->registerEvent('cron_delete', $this->plugin_name, 'delete');
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}
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//* This function is called, when a cron job is inserted in the database
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function insert($event_name, $data) {
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global $app, $conf;
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if($data["new"]["parent_domain_id"] == '') {
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$app->log("Parent domain not set", LOGLEVEL_WARN);
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return 0;
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}
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//* get data from web
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$parent_domain = $app->db->queryOneRecord("SELECT `domain_id`, `system_user`, `system_group`, `document_root`, `domain` FROM `web_domain` WHERE `domain_id` = ".intval($data["new"]["parent_domain_id"]));
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if(!$parent_domain["domain_id"]) {
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$app->log("Parent domain not found", LOGLEVEL_WARN);
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return 0;
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}
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if(!$app->system->is_allowed_user($parent_domain['system_user'], true, true)
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|| !$app->system->is_allowed_group($parent_domain['system_group'], true, true)) {
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$app->log("Websites (and Crons) cannot be owned by the root user or group.", LOGLEVEL_WARN);
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return false;
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}
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$this->parent_domain = $parent_domain;
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$app->uses('system');
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if($app->system->is_user($parent_domain['system_user'])) {
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/**
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* Setup Jailkit Chroot System If Enabled
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*/
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if ($data['new']['type'] == "chrooted")
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{
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// load the server configuration options
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/*
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$app->uses("getconf");
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$this->data = $data;
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$this->app = $app;
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$this->jailkit_config = $app->getconf->get_server_config($conf["server_id"], 'jailkit');
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$this->parent_domain = $parent_domain;
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$this->_setup_jailkit_chroot();
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//$command .= 'usermod -U '.escapeshellcmd($parent_domain['system_user']);
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//exec($command);
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$this->_add_jailkit_user();
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*/
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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->jailkit_config = $app->getconf->get_server_config($conf["server_id"], 'jailkit');
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$this->_update_website_security_level();
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$app->system->web_folder_protection($parent_domain['document_root'], false);
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$this->_setup_jailkit_chroot();
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$this->_add_jailkit_user();
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$command .= 'usermod -U '.escapeshellcmd($parent_domain["system_user"]).' 2>/dev/null';
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exec($command);
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$this->_update_website_security_level();
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$app->system->web_folder_protection($parent_domain['document_root'], true);
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}
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$app->log("Jailkit Plugin (Cron) -> insert username:".$parent_domain['system_user'], LOGLEVEL_DEBUG);
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} else {
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$app->log("Jailkit Plugin (Cron) -> insert username:".$parent_domain['system_user']." skipped, the user does not exist.", LOGLEVEL_WARN);
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}
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}
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//* This function is called, when a cron job is updated in the database
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function update($event_name, $data) {
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global $app, $conf;
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if($data["new"]["parent_domain_id"] == '') {
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$app->log("Parent domain not set", LOGLEVEL_WARN);
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return 0;
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}
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//* get data from web
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$parent_domain = $app->db->queryOneRecord("SELECT `domain_id`, `system_user`, `system_group`, `document_root`, `domain` FROM `web_domain` WHERE `domain_id` = ".intval($data["new"]["parent_domain_id"]));
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if(!$parent_domain["domain_id"]) {
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$app->log("Parent domain not found", LOGLEVEL_WARN);
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return 0;
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}
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if(!$app->system->is_allowed_user($parent_domain['system_user'], true, true)
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|| !$app->system->is_allowed_group($parent_domain['system_group'], true, true)) {
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$app->log("Websites (and Crons) cannot be owned by the root user or group.", LOGLEVEL_WARN);
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return false;
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}
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$app->uses('system');
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$this->parent_domain = $parent_domain;
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if($app->system->is_user($parent_domain['system_user'])) {
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/**
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* Setup Jailkit Chroot System If Enabled
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*/
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if ($data['new']['type'] == "chrooted")
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{
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$app->log("Jailkit Plugin (Cron) -> setting up jail", LOGLEVEL_DEBUG);
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// load the server configuration options
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/*
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$app->uses("getconf");
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$this->data = $data;
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$this->app = $app;
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$this->jailkit_config = $app->getconf->get_server_config($conf["server_id"], 'jailkit');
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$this->parent_domain = $parent_domain;
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$this->_setup_jailkit_chroot();
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$this->_add_jailkit_user();
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*/
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$app->uses("getconf");
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$this->data = $data;
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$this->app = $app;
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$this->jailkit_config = $app->getconf->get_server_config($conf["server_id"], 'jailkit');
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$this->_update_website_security_level();
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$app->system->web_folder_protection($parent_domain['document_root'], false);
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$this->_setup_jailkit_chroot();
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$this->_add_jailkit_user();
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$this->_update_website_security_level();
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$app->system->web_folder_protection($parent_domain['document_root'], true);
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}
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$app->log("Jailkit Plugin (Cron) -> update username:".$parent_domain['system_user'], LOGLEVEL_DEBUG);
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} else {
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$app->log("Jailkit Plugin (Cron) -> update username:".$parent_domain['system_user']." skipped, the user does not exist.", LOGLEVEL_WARN);
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}
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}
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//* This function is called, when a cron job is deleted in the database
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function delete($event_name, $data) {
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global $app, $conf;
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//* nothing to do here!
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}
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function _setup_jailkit_chroot()
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{
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global $app;
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//check if the chroot environment is created yet if not create it with a list of program sections from the config
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if (!is_dir($this->parent_domain['document_root'].'/etc/jailkit'))
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{
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$command = '/usr/local/ispconfig/server/scripts/create_jailkit_chroot.sh';
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$command .= ' '.escapeshellcmd($this->parent_domain['document_root']);
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$command .= ' \''.$this->jailkit_config['jailkit_chroot_app_sections'].'\'';
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exec($command.' 2>/dev/null');
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$this->app->log("Added jailkit chroot with command: ".$command, LOGLEVEL_DEBUG);
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//$this->_add_jailkit_programs(); // done later on
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$this->app->load('tpl');
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$tpl = new tpl();
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$tpl->newTemplate("bash.bashrc.master");
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$tpl->setVar('jailkit_chroot', true);
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$tpl->setVar('domain', $this->parent_domain['domain']);
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$tpl->setVar('home_dir', $this->_get_home_dir(""));
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$bashrc = escapeshellcmd($this->parent_domain['document_root']).'/etc/bash.bashrc';
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if(@is_file($bashrc) || @is_link($bashrc)) unlink($bashrc);
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$app->system->file_put_contents($bashrc, $tpl->grab());
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unset($tpl);
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$this->app->log('Added bashrc script: '.$bashrc, LOGLEVEL_DEBUG);
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$tpl = new tpl();
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$tpl->newTemplate('motd.master');
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$tpl->setVar('domain', $this->parent_domain['domain']);
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$motd = escapeshellcmd($this->parent_domain['document_root']).'/var/run/motd';
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if(@is_file($motd) || @is_link($motd)) unlink($motd);
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$app->system->file_put_contents($motd, $tpl->grab());
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}
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$this->_add_jailkit_programs();
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}
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function _add_jailkit_programs()
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{
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global $app;
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//copy over further programs and its libraries
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$command = '/usr/local/ispconfig/server/scripts/create_jailkit_programs.sh';
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$command .= ' '.escapeshellcmd($this->parent_domain['document_root']);
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$command .= ' \''.$this->jailkit_config['jailkit_chroot_app_programs'].'\'';
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exec($command.' 2>/dev/null');
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$this->app->log("Added programs to jailkit chroot with command: ".$command, LOGLEVEL_DEBUG);
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$command = '/usr/local/ispconfig/server/scripts/create_jailkit_programs.sh';
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$command .= ' '.escapeshellcmd($this->parent_domain['document_root']);
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$command .= ' \''.$this->jailkit_config['jailkit_chroot_cron_programs'].'\'';
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exec($command.' 2>/dev/null');
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$this->app->log("Added cron programs to jailkit chroot with command: ".$command, LOGLEVEL_DEBUG);
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}
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function _add_jailkit_user()
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{
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global $app;
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//add the user to the chroot
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$jailkit_chroot_userhome = $this->_get_home_dir($this->parent_domain['system_user']);
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if(!is_dir($this->parent_domain['document_root'].'/etc')) mkdir($this->parent_domain['document_root'].'/etc');
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if(!is_file($this->parent_domain['document_root'].'/etc/passwd')) exec('touch '.$this->parent_domain['document_root'].'/etc/passwd');
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// IMPORTANT!
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// ALWAYS create the user. Even if the user was created before
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// if we check if the user exists, then a update (no shell -> jailkit) will not work
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// and the user has FULL ACCESS to the root of the server!
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$command = '/usr/local/ispconfig/server/scripts/create_jailkit_user.sh';
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$command .= ' '.escapeshellcmd($this->parent_domain['system_user']);
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$command .= ' '.escapeshellcmd($this->parent_domain['document_root']);
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$command .= ' '.$jailkit_chroot_userhome;
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$command .= ' '.escapeshellcmd("/bin/bash");
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exec($command.' 2>/dev/null');
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$this->app->log("Added jailkit user to chroot with command: ".$command, LOGLEVEL_DEBUG);
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$app->system->mkdir(escapeshellcmd($this->parent_domain['document_root'].$jailkit_chroot_userhome), 0755, true);
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$app->system->chown(escapeshellcmd($this->parent_domain['document_root'].$jailkit_chroot_userhome), escapeshellcmd($this->parent_domain['system_user']));
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$app->system->chgrp(escapeshellcmd($this->parent_domain['document_root'].$jailkit_chroot_userhome), escapeshellcmd($this->parent_domain['system_group']));
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}
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function _get_home_dir($username)
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{
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return str_replace("[username]", escapeshellcmd($username), $this->jailkit_config["jailkit_chroot_home"]);
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}
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//* Update the website root directory permissions depending on the security level
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function _update_website_security_level() {
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global $app, $conf;
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// load the server configuration options
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$app->uses("getconf");
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$web_config = $app->getconf->get_server_config($conf["server_id"], 'web');
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// Get the parent website of this shell user
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$web = $app->db->queryOneRecord("SELECT * FROM web_domain WHERE domain_id = ".$this->data['new']['parent_domain_id']);
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//* If the security level is set to high
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if($web_config['security_level'] == 20 && is_array($web)) {
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$app->system->web_folder_protection($web["document_root"], false);
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$app->system->chmod($web["document_root"], 0755);
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$app->system->chown($web["document_root"], 'root');
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$app->system->chgrp($web["document_root"], 'root');
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$app->system->web_folder_protection($web["document_root"], true);
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}
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}
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//* Wrapper for exec function for easier debugging
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private function _exec($command) {
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global $app;
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$app->log('exec: '.$command, LOGLEVEL_DEBUG);
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exec($command);
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}
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} // end class
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?>
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