mirror of
https://github.com/nuxsmin/sysPass.git
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416 lines
14 KiB
PHP
416 lines
14 KiB
PHP
<?php
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/**
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* sysPass
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*
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* @author nuxsmin
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* @link http://syspass.org
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* @copyright 2012-2015 Rubén Domínguez nuxsmin@syspass.org
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*
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* This file is part of sysPass.
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*
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* sysPass is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* sysPass is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with sysPass. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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defined('APP_ROOT') || die(_('No es posible acceder directamente a este archivo'));
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/**
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* Esta clase es la encargada de realizar la autentificación de usuarios de sysPass.
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*/
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class SP_LDAP
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{
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// Variabla que contiene los datos de una búsqueda
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public static $ldapSearchData;
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// Variable para determinar si conecta con Active Directory
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private static $isADS = false;
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// Variables de conexión con LDAP
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private static $ldapConn;
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private static $ldapServer;
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private static $searchBase;
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private static $bindDN;
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private static $bindPass;
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private static $ldapGroup;
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/**
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* Obtener el recurso de conexión a LDAP.
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*
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* @return resource
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*/
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public static function getConn()
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{
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if (is_resource(self::$ldapConn)) {
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return self::$ldapConn;
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}
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}
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/**
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* Comprobar la conexión al servidor de LDAP.
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*
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* @param string $ldapServer con la dirección del servidor
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* @param string $bindDN con el usuario de conexión
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* @param string $bindPass con la clave del usuario de conexión
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* @param string $searchBase con la base para las búsquedas
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* @param string $ldapGroup con el grupo con los usuarios de acceso
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* @return false|int Con el número de entradas encontradas
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*/
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public static function checkLDAPConn($ldapServer, $bindDN, $bindPass, $searchBase, $ldapGroup)
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{
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self::$ldapServer = $ldapServer;
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self::$bindDN = $bindDN;
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self::$bindPass = $bindPass;
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self::$searchBase = $searchBase;
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self::$ldapGroup = $ldapGroup;
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try {
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self::ldapConnect();
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self::ldapBind();
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$numObjects = self::searchBase();
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} catch (Exception $e) {
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return false;
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}
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return $numObjects;
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}
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/**
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* Realizar la conexión al servidor de LDAP.
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*
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* @throws Exception
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* @return bool
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*/
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public static function ldapConnect()
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{
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$message['action'] = __FUNCTION__;
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// Conexión al servidor LDAP
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if (!self::$ldapConn = @ldap_connect(self::$ldapServer)) {
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$message['text'][] = _('No es posible conectar con el servidor de LDAP') . " '" . self::$ldapServer . "'";
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$message['text'][] = 'LDAP ERROR: ' . ldap_error(self::$ldapConn) . '(' . ldap_errno(self::$ldapConn) . ')';
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SP_Log::wrLogInfo($message);
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throw new Exception(_('No es posible conectar con el servidor de LDAP'));
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}
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@ldap_set_option(self::$ldapConn, LDAP_OPT_NETWORK_TIMEOUT, 10); // Set timeout
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@ldap_set_option(self::$ldapConn, LDAP_OPT_PROTOCOL_VERSION, 3); // Set LDAP version
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return true;
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}
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/**
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* Realizar la autentificación con el servidor de LDAP.
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*
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* @param string $userDN con el DN del usuario
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* @param string $userPass con la clave del usuario
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* @throws Exception
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* @return bool
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*/
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public static function ldapBind($userDN = '', $userPass = '')
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{
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$message['action'] = __FUNCTION__;
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$dn = ($userDN) ? $userDN : self::$bindDN;
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$pass = ($userPass) ? $userPass : self::$bindPass;
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if (!@ldap_bind(self::$ldapConn, $dn, $pass)) {
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$message['text'][] = _('Error al conectar (BIND)');
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$message['text'][] = 'LDAP ERROR: ' . ldap_error(self::$ldapConn) . '(' . ldap_errno(self::$ldapConn) . ')';
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$message['text'][] = 'LDAP DN: ' . $dn;
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SP_Log::wrLogInfo($message);
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throw new Exception(_('Error al conectar (BIND)'));
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}
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return true;
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}
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/**
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* Realizar una búsqueda de objetos en la ruta indicada.
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*
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* @throws Exception
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* @return int con el número de resultados
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*/
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private static function searchBase()
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{
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$message['action'] = __FUNCTION__;
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$groupDN = (!empty(self::$ldapGroup)) ? self::searchGroupDN() : '*';
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$filter = '(&(|(memberOf=' . $groupDN . ')(groupMembership=' . $groupDN . '))(|(objectClass=inetOrgPerson)(objectClass=person)(objectClass=simpleSecurityObject)))';
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$filterAttr = array("dn");
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$searchRes = @ldap_search(self::$ldapConn, self::$searchBase, $filter, $filterAttr);
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if (!$searchRes) {
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$message['text'][] = _('Error al buscar objetos en DN base');
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$message['text'][] = 'LDAP ERROR: ' . ldap_error(self::$ldapConn) . '(' . ldap_errno(self::$ldapConn) . ')';
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$message['text'][] = 'LDAP FILTER: ' . $filter;
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SP_Log::wrLogInfo($message);
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throw new Exception(_('Error al buscar objetos en DN base'));
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}
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return @ldap_count_entries(self::$ldapConn, $searchRes);
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}
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/**
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* Obtener el RDN del grupo.
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*
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* @throws Exception
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* @return string con el RDN del grupo
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*/
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private static function searchGroupDN()
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{
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$message['action'] = __FUNCTION__;
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$groupName = array();
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if (preg_match('/^cn=([\w\s-]+),.*/i', self::$ldapGroup, $groupName)) {
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$filter = '(cn=' . $groupName[1] . ')';
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} else {
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$filter = '(cn=' . self::$ldapGroup . ')';
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}
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$filterAttr = array("dn", "cn");
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$searchRes = @ldap_search(self::$ldapConn, self::$searchBase, $filter, $filterAttr);
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if (!$searchRes) {
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$message['text'][] = _('Error al buscar RDN de grupo');
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$message['text'][] = 'LDAP ERROR: ' . ldap_error(self::$ldapConn) . '(' . ldap_errno(self::$ldapConn) . ')';
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$message['text'][] = 'LDAP FILTER: ' . $filter;
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SP_Log::wrLogInfo($message);
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throw new Exception(_('Error al buscar RDN de grupo'));
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}
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if (@ldap_count_entries(self::$ldapConn, $searchRes) === 1) {
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$ldapSearchData = @ldap_get_entries(self::$ldapConn, $searchRes);
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if (!$ldapSearchData) {
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$message['text'][] = _('Error al buscar RDN de grupo');
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$message['text'][] = 'LDAP ERROR: ' . ldap_error(self::$ldapConn) . '(' . ldap_errno(self::$ldapConn) . ')';
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SP_Log::wrLogInfo($message);
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throw new Exception(_('Error al buscar RDN de grupo'));
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}
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$message['text'][] = _('RDN de grupo encontrado');
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$message['text'][] = 'RDN: ' . $ldapSearchData[0]["dn"];
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SP_Log::wrLogInfo($message);
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return $ldapSearchData[0]["dn"];
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} else {
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$message['text'][] = _('Error al buscar RDN de grupo');
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$message['text'][] = 'LDAP FILTER: ' . $filter;
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SP_Log::wrLogInfo($message);
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throw new Exception(_('Error al buscar RDN de grupo'));
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}
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}
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/**
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* Comprobar si los parámetros necesario de LDAP están establecidos.
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*
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* @return bool
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*/
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public static function checkLDAPParams()
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{
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self::$searchBase = SP_Config::getValue('ldap_base');
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self::$ldapServer = SP_Config::getValue('ldap_server');
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self::$bindDN = SP_Config::getValue('ldap_binduser');
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self::$bindPass = SP_Config::getValue('ldap_bindpass');
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self::$ldapGroup = SP_Config::getValue('ldap_group', '*');
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self::$isADS = SP_Config::getValue('ldap_ads', false);
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if (!self::$searchBase || !self::$ldapServer || !self::$bindDN || !self::$bindPass) {
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$message['action'] = __FUNCTION__;
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$message['text'][] = _('Los parámetros de LDAP no están configurados');
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SP_Log::wrLogInfo($message);
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return false;
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}
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return true;
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}
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/**
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* Obtener el RDN del usuario que realiza el login.
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*
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* @param string $userLogin con el login del usuario
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* @throws Exception
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* @return none
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*/
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public static function getUserDN($userLogin)
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{
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$message['action'] = __FUNCTION__;
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if (self::$isADS === true) {
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$filter = '(&(|(samaccountname=' . $userLogin . ')(cn=' . $userLogin . ')(uid=' . $userLogin . '))(|(objectClass=inetOrgPerson)(objectClass=person)(objectClass=simpleSecurityObject))(objectCategory=person))';
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} else {
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$filter = '(&(|(samaccountname=' . $userLogin . ')(cn=' . $userLogin . ')(uid=' . $userLogin . '))(|(objectClass=inetOrgPerson)(objectClass=person)(objectClass=simpleSecurityObject)))';
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}
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$filterAttr = array("dn", "displayname", "samaccountname", "mail", "memberof", "lockouttime", "fullname", "groupmembership", "mail");
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$searchRes = @ldap_search(self::$ldapConn, self::$searchBase, $filter, $filterAttr);
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if (!$searchRes) {
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$message['text'][] = _('Error al buscar el DN del usuario');
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$message['text'][] = 'LDAP ERROR: ' . ldap_error(self::$ldapConn) . '(' . ldap_errno(self::$ldapConn) . ')';
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$message['text'][] = 'LDAP FILTER: ' . $filter;
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SP_Log::wrLogInfo($message);
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throw new Exception(_('Error al buscar el DN del usuario'));
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}
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if (@ldap_count_entries(self::$ldapConn, $searchRes) === 1) {
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self::$ldapSearchData = @ldap_get_entries(self::$ldapConn, $searchRes);
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if (!self::$ldapSearchData) {
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$message['text'][] = _('Error al localizar el usuario en LDAP');
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$message['text'][] = 'LDAP ERROR: ' . ldap_error(self::$ldapConn) . '(' . ldap_errno(self::$ldapConn) . ')';
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SP_Log::wrLogInfo($message);
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throw new Exception(_('Error al localizar el usuario en LDAP'));
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}
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} else {
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$message['text'][] = _('Error al buscar el DN del usuario');
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$message['text'][] = 'LDAP FILTER: ' . $filter;
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SP_Log::wrLogInfo($message);
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throw new Exception(_('Error al buscar el DN del usuario'));
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}
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}
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/**
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* Realizar la desconexión del servidor de LDAP.
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*
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* @return none
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*/
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public static function unbind()
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{
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@ldap_unbind(self::$ldapConn);
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}
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/**
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* Obtener los atributos del usuario.
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*
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* @param array $attribs con los atributos a obtener
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* @return array con los atributos disponibles y sus valores
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*/
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public static function getLDAPAttr($attribs)
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{
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$res = array();
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foreach (self::$ldapSearchData as $entryValue) {
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if (is_array($entryValue)) {
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foreach ($entryValue as $entryAttr => $attrValue) {
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if (is_array($attrValue)) {
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if (array_key_exists(strtolower($entryAttr), $attribs)) {
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if ($attrValue['count'] > 1) {
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// Almacenamos un array de valores
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$res[$attribs[$entryAttr]] = $attrValue;
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} else {
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// Almacenamos 1 solo valor
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$res[$attribs[$entryAttr]] = $attrValue[0];
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}
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}
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}
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}
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}
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}
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return $res;
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}
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/**
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* Buscar al usuario en un grupo.
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*
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* @param string $userDN con el RDN del usuario
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* @throws Exception
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* @return bool
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*/
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public static function searchUserInGroup($userDN)
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{
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$message['action'] = __FUNCTION__;
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$ldapGroup = SP_Config::getValue('ldap_group');
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// El filtro de grupo no está establecido
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if (empty($ldapGroup)) {
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return true;
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}
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// Obtenemos el DN del grupo
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if (!$groupDN = self::searchGroupDN()) {
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return false;
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}
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$userDN = self::escapeLdapDN($userDN);
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$filter = '(&(' . $groupDN . ')(|(member=' . $userDN . ')(uniqueMember=' . $userDN . '))(|(objectClass=groupOfNames)(objectClass=groupOfUniqueNames)(objectClass=group)))';
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$filterAttr = array('member', 'uniqueMember');
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$searchRes = @ldap_search(self::$ldapConn, self::$searchBase, $filter, $filterAttr);
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if (!$searchRes) {
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$message['text'][] = _('Error al buscar el grupo de usuarios');
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$message['text'][] = 'LDAP ERROR: ' . ldap_error(self::$ldapConn) . '(' . ldap_errno(self::$ldapConn) . ')';
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$message['text'][] = 'LDAP FILTER: ' . $filter;
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SP_Log::wrLogInfo($message);
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throw new Exception(_('Error al buscar el grupo de usuarios'));
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}
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$numEntries = ldap_count_entries(self::$ldapConn, $searchRes);
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if ($numEntries === 0) {
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$message['text'][] = _('El usuario no pertenece al grupo');
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$message['text'][] = 'LDAP ERROR: ' . ldap_error(self::$ldapConn) . '(' . ldap_errno(self::$ldapConn) . ')';
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$message['text'][] = 'LDAP FILTER: ' . $filter;
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SP_Log::wrLogInfo($message);
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throw new Exception(_('El usuario no pertenece al grupo'));
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}
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return true;
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}
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/**
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* Escapar carácteres especiales en el RDN de LDAP.
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*
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* @param string $dn con el RDN del usuario
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* @return string
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*/
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private static function escapeLdapDN($dn)
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{
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$chars = array('/(,)(?!uid|cn|ou|dc)/i', '/(?<!uid|cn|ou|dc)(=)/i', '/(")/', '/(;)/', '/(>)/', '/(<)/', '/(\+)/', '/(#)/', '/\G(\s)/', '/(\s)(?=\s*$)/', '/(\/)/');
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return preg_replace($chars, '\\\$1', $dn);
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}
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}
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