629 lines
18 KiB
PHP
629 lines
18 KiB
PHP
<?php
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/*
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$Id$
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This code is part of LDAP Account Manager (http://www.sourceforge.net/projects/lam)
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Copyright (C) 2003 Roland Gruber
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This program 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 2 of the License, or
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(at your option) any later version.
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This program 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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/**
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* ldap.inc provides basic functions to connect to the OpenLDAP server.
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*
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* @package LDAP
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* @author Roland Gruber
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*/
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/** Access to configuration data */
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include_once("config.inc");
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/** Encryption functions */
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include_once("blowfish.inc");
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/**
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* Converts a HEX string to a binary value
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*
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* @param string $value HEX string
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* @return binary result binary
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*/
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function hex2bin($value) {
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return pack("H*", $value);
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}
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/**
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* Returns the hash value of a plain text password
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* the hash algorithm depends on the configuration file
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*
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* @param string $password the password string
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* @param boolean $enabled marks the hash as enabled/disabled (e.g. by prefixing "!")
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* @return string the password hash
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*/
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function pwd_hash($password, $enabled=true) {
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// check for empty password
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if (! $password || ($password == "")) {
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return "";
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}
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// calculate new random number
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$_SESSION['ldap']->new_rand();
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// hash password with algorithm from config file
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$hash = "";
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switch ($_SESSION['config']->get_pwdhash()) {
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case 'CRYPT':
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$hash = "{CRYPT}" . crypt($password);
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break;
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case 'MD5':
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$hash = "{MD5}" . base64_encode(hex2bin(md5($password)));
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break;
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case 'SMD5':
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$salt0 = substr(pack("h*", md5($_SESSION['ldap']->rand)), 0, 8);
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$salt = substr(pack("H*", md5($salt0 . $password)), 0, 4);
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$hash = "{SMD5}" . base64_encode(hex2bin(md5($password . $salt)) . $salt);
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break;
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case 'SHA':
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// PHP 4.3+ can use sha1() function
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if (function_exists(sha1)) {
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$hash = "{SHA}" . base64_encode(hex2bin(sha1($password)));
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}
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// otherwise use MHash
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elseif (function_exists(mHash)) {
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$hash = "{SHA}" . base64_encode(mHash(MHASH_SHA1, $password));
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}
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// if SHA1 is not possible use crypt()
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else {
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$hash = "{CRYPT}" . crypt($password);
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}
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break;
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case 'SSHA':
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// PHP 4.3+ can use sha1() function
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if (function_exists(sha1)) {
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$salt0 = substr(pack("h*", md5($_SESSION['ldap']->rand)), 0, 8);
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$salt = substr(pack("H*", sha1($salt0 . $password)), 0, 4);
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$hash = "{SSHA}" . base64_encode(hex2bin(sha1($password . $salt)) . $salt);
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}
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// otherwise use MHash
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elseif (function_exists(mHash)) {
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$salt = mhash_keygen_s2k(MHASH_SHA1, $password, substr(pack("h*", md5($_SESSION['ldap']->rand)), 0, 8), 4);
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$hash = base64_encode(mHash(MHASH_SHA1, $password . $salt) . $salt);
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$hash = "{SSHA}" . $hash;
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}
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// if SSHA is not possible use crypt()
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else {
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$hash = "{CRYPT}" . crypt($password);
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}
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break;
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case 'PLAIN':
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$hash = $password;
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break;
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// use SSHA if the setting is invalid
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default:
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// PHP 4.3+ can use sha1() function
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if (function_exists(sha1)) {
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$salt0 = substr(pack("h*", md5($_SESSION['ldap']->rand)), 0, 8);
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$salt = substr(pack("H*", sha1($salt0 . $password)), 0, 4);
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$hash = "{SSHA}" . base64_encode(hex2bin(sha1($password . $salt)) . $salt);
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}
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// otherwise use MHash
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elseif (function_exists(mHash)) {
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$salt = mhash_keygen_s2k(MHASH_SHA1, $password, substr(pack("h*", md5($_SESSION['ldap']->rand)), 0, 8), 4);
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$hash = base64_encode(mHash(MHASH_SHA1, $password . $salt) . $salt);
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$hash = "{SSHA}" . $hash;
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}
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// if SSHA is not possible use crypt()
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else {
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$hash = "{CRYPT}" . crypt($password);
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}
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break;
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}
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// enable/disable password
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if (! $enabled) return pwd_disable($hash);
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else return $hash;
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}
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/**
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* Marks an password hash as enabled and returns the new hash string
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*
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* @param string $hash hash value to enable
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* @return string enabled password hash
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*/
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function pwd_enable($hash) {
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// check if password is disabled (old wrong LAM method)
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if ((substr($hash, 0, 2) == "!{") || ((substr($hash, 0, 2) == "*{"))) {
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return substr($hash, 1, strlen($hash));
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}
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// check for "!" or "*" at beginning of password hash
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else {
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if (substr($hash, 0, 1) == "{") {
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$pos = strpos($hash, "}");
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if ((substr($hash, $pos + 1, 1) == "!") || (substr($hash, $pos + 1, 1) == "*")) {
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// enable hash
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return substr($hash, 0, $pos + 1) . substr($hash, $pos + 2, strlen($hash));
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}
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else return $hash; // not disabled
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}
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else return $hash; // password is plain text
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}
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}
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/**
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* Marks an password hash as disabled and returns the new hash string
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*
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* @param string $hash hash value to disable
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* @return string disabled hash value
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*/
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function pwd_disable($hash) {
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// check if password is disabled (old wrong LAM method)
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if ((substr($hash, 0, 2) == "!{") || ((substr($hash, 0, 2) == "*{"))) {
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return $hash;
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}
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// check for "!" or "*" at beginning of password hash
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else {
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if (substr($hash, 0, 1) == "{") {
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$pos = strpos($hash, "}");
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if ((substr($hash, $pos + 1, 1) == "!") || (substr($hash, $pos + 1, 1) == "*")) {
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// hash already disabled
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return $hash;
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}
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else return substr($hash, 0, $pos + 1) . "!" . substr($hash, $pos + 1, strlen($hash)); // not disabled
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}
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else return $hash; // password is plain text
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}
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}
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/**
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* Checks if a password hash is enabled/disabled
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*
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* @param string $hash password hash to check
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* @return boolean true if the password is marked as enabled
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*/
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function pwd_is_enabled($hash) {
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// disabled passwords have a "!" or "*" at the beginning (old wrong LAM method)
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if ((substr($hash, 0, 2) == "!{") || ((substr($hash, 0, 2) == "*{"))) return false;
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if (substr($hash, 0, 1) == "{") {
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$pos = strrpos($hash, "}");
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// check if hash starts with "!" or "*"
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if ((substr($hash, $pos + 1, 1) == "!") || (substr($hash, $pos + 1, 1) == "*")) return false;
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else return true;
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}
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else return true;
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}
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/**
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* Ldap manages connection to LDAP and includes several helper functions.
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*
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* @package LDAP
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*/
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class Ldap{
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/** Object of Config to access preferences */
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var $conf;
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/** Server handle */
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var $server;
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/** LDAP username used for bind */
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var $username;
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/** LDAP password used for bind */
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var $password;
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/** Array with all objectClass strings from the LDAP server */
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var $objectClasses;
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// Capabilities of the LDAP server
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/** Host attribute in inetOrgPerson */
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var $supports_unix_hosts = false;
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/** ObjectClass sambaAccount */
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var $supports_samba2_schema = false;
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/** ObjectClass sambaSamAccount */
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var $supports_samba3_schema = false;
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/** Random number (changes on every page request) */
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var $rand;
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/**
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* @param object $config an object of class Config
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*/
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function Ldap($config) {
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setlanguage();
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if (is_object($config)) $this->conf = $config;
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else return false;
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mt_srand((double)microtime()*1000000);
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$this->rand = mt_rand();
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return true;
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}
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/**
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* Connects to the server using the given username and password
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*
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* @param string $user user name
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* @param string $passwd password
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* @return mixed if connect succeeds the server handle is returned, else false
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*/
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function connect($user, $passwd) {
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// close any prior connection
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@$this->close();
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// do not allow anonymous bind
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if ((!$user)||($user == "")||(!$passwd)) {
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return false;
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}
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// save password und username encrypted
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$this->encrypt_login($user, $passwd);
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$this->server = @ldap_connect($this->conf->get_ServerURL());
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if ($this->server) {
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// use LDAPv3
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ldap_set_option($this->server, LDAP_OPT_PROTOCOL_VERSION, 3);
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// start TLS if possible
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if (function_exists('ldap_start_tls')) {
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@ldap_start_tls($this->server);
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// connect without TLS if it failed
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if (ldap_errno($this->server) != 0) {
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@ldap_close($this->server);
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$this->server = @ldap_connect($this->conf->get_ServerURL());
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ldap_set_option($this->server, LDAP_OPT_PROTOCOL_VERSION, 3);
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}
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}
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$bind = @ldap_bind($this->server, $user, $passwd);
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if ($bind) {
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// read objectClasses from server and update capabilities if needed
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if (! $this->objectClasses) {
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$this->updateClasses();
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$this->updateCapabilities();
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}
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// return success number
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return ldap_errno($this->server);
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}
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// return error number
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else return ldap_errno($this->server);
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}
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else return false;
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}
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/** Closes connection to server */
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function close() {
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@ldap_close($this->server);
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}
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/**
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* Searches LDAP for a specific user name and returns its DN entry
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*
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* @param string $name user name
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* @return string DN
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*/
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function search_username($name) {
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$filter = "(uid=$name)";
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$attrs = array();
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$sr = @ldap_search($this->server, $this->conf->get_UserSuffix(), $filter, $attrs);
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if ($sr) {
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$info = ldap_get_entries($this->server, $sr);
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// return only first DN entry
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$ret = $info[0]["dn"];
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ldap_free_result($sr);
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return $ret;
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}
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}
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/**
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* Returns an array with all organizational units under the given suffix
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*
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* @param string $suffix search suffix
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* @return array DNs of organizational units
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*/
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function search_units($suffix) {
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$ret = array();
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$sr = @ldap_search($this->server(), $suffix, "objectClass=organizationalunit", array("DN"));
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if ($sr) {
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$units = ldap_get_entries($this->server, $sr);
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// extract Dns
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for ($i = 0; $i < sizeof($units); $i++) {
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if ($units[$i]['dn']) $ret[] = $units[$i]['dn'];
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}
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}
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// add root suffix if needed
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$found = false;
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for ($i = 0; $i < sizeof($ret); $i++) { // search suffix case-intensitive
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if (strtolower($suffix) == strtolower($ret[$i])) {
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$found = true;
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break;
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}
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}
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if (!$found) {
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$ret[] = $suffix;
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}
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usort($ret, array($this,"cmp_array"));
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return $ret;
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}
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/**
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* Returns an array with all Samba 3 domain entries under the given suffix
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*
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* @param string $suffix search suffix
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* @return array list of samba3domain objects
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*/
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function search_domains($suffix) {
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$ret = array();
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$attr = array("DN", "sambaDomainName", "sambaSID", "sambaNextRid", "sambaNextGroupRid",
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"sambaNextUserRid", "sambaAlgorithmicRidBase");
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$sr = @ldap_search($this->server(), $suffix, "objectClass=sambaDomain", $attr);
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if ($sr) {
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$units = ldap_get_entries($this->server, $sr);
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// delete count entry
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array_shift($units);
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// extract attributes
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for ($i = 0; $i < sizeof($units); $i++) {
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$ret[$i] = new samba3domain();
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$ret[$i]->dn = $units[$i]['dn'];
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$ret[$i]->name = $units[$i]['sambadomainname'][0];
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$ret[$i]->SID = $units[$i]['sambasid'][0];
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$ret[$i]->nextRID = $units[$i]['sambanextrid'][0];
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$ret[$i]->nextGroupRID = $units[$i]['sambanextgrouprid'][0];
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$ret[$i]->nextUserRID = $units[$i]['sambanextuserrid'][0];
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if (isset($units[$i]['sambaalgorithmicridbase'][0])) $ret[$i]->RIDbase = $units[$i]['sambaalgorithmicridbase'][0];
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}
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// sort array by domain name
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usort($ret, array($this,"cmp_domain"));
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}
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return $ret;
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}
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/** Reads the array of objectClasses from the LDAP server */
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function updateClasses() {
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// read from default cn
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$sr = @ldap_read($this->server, 'cn=subschema', '(objectClass=*)', array('objectclasses'));
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// if default was not correct check different cn
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if (!$sr) $sr = @ldap_read($this->server, 'cn=schema', '(objectClass=*)', array('objectclasses'));
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if ($sr) {
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// get search result and save it
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$info = @ldap_get_entries($this->server,$sr);
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if ($info) {
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$this->objectClasses = $info[0]['objectclasses'];
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array_shift($this->objectClasses);
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return true;
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}
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}
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// if search failed save empty result
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$this->objectClasses = array();
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}
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/** Updates the capabilities values (var $supports_*) */
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function updateCapabilities() {
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for ($i = 0; $i < sizeof($this->objectClasses); $i++) {
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$line = $this->objectClasses[$i];
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// search keywords
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if (strpos($line, "NAME 'inetOrgPerson'") && strpos($line, " host ")) $this->supports_unix_hosts = true;
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if (strpos($line, "NAME 'sambaAccount'")) $this->supports_samba2_schema = true;
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if (strpos($line, "NAME 'sambaSamAccount'")) $this->supports_samba3_schema = true;
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}
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}
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/**
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* Returns the LDAP connection handle
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*
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* @return object connection handle
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*/
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function server() {
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return $this->server;
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}
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/** Closes connection to LDAP server before serialization */
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function __sleep() {
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$this->close();
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// define which attributes to save
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return array("conf", "username", "password", "ldapUserAttributes", "ldapGroupAttributes",
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"ldapHostAttributes", "objectClasses", "supports_unix_hosts", "supports_samba2_schema",
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"supports_samba3_schema", "rand");
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}
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/** Reconnects to LDAP server when deserialized */
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function __wakeup() {
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$data = $this->decrypt_login();
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$this->connect($data[0], $data[1]);
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// change random number
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mt_srand($this->rand + (microtime() * 1000000));
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$this->rand = mt_rand();
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// delete PDF files which are older than 10 min
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if (isset($_SESSION['lampath'])) {
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$relpath = $_SESSION['lampath'] . 'tmp/';
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$time = time();
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$dir = @opendir($relpath);
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while ($file = @readdir($dir)) {
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if (substr($file, -4) == '.pdf') {
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$path = $relpath . $file;
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if ($time - filemtime($path) > 600) {
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@unlink($path);
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}
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}
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}
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@closedir($h);
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}
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}
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/** Calculates a new value for rand */
|
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function new_rand() {
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// change random number
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mt_srand($this->rand + (microtime() * 1000000));
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$this->rand = mt_rand();
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}
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|
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/**
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* Encrypts a string
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*
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* @param string $data string to encrypt
|
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* @return object encrypted string
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*/
|
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function encrypt($data) {
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// use MCrypt if available
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if (function_exists(mcrypt_create_iv)) {
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// read key and iv from cookie
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$iv = base64_decode($_COOKIE["IV"]);
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$key = base64_decode($_COOKIE["Key"]);
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// encrypt string
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return mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $data, MCRYPT_MODE_ECB, $iv);
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}
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// use Blowfish if MCrypt is not available
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else {
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// read key and iv from cookie
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$iv = base64_decode($_COOKIE["IV"]);
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$key = base64_decode($_COOKIE["Key"]);
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$b_key = $iv . $key;
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// encrypt string
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$b_fish = new Cipher_blowfish();
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return $b_fish->encrypt($data, $b_key);
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}
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}
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|
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/**
|
|
* Decrypts a string
|
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*
|
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* @param object $data string to decrypt
|
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* @return string decrypted string
|
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*/
|
|
function decrypt($data) {
|
|
// use MCrypt if available
|
|
if (function_exists(mcrypt_create_iv)) {
|
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// read key and iv from cookie
|
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$iv = base64_decode($_COOKIE["IV"]);
|
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$key = base64_decode($_COOKIE["Key"]);
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// decrypt string
|
|
$ret = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, $data, MCRYPT_MODE_ECB, $iv);
|
|
$ret = str_replace(chr(00), "", $ret);
|
|
return $ret;
|
|
}
|
|
// use Blowfish if MCrypt is not available
|
|
else {
|
|
// read key and iv from cookie
|
|
$iv = base64_decode($_COOKIE["IV"]);
|
|
$key = base64_decode($_COOKIE["Key"]);
|
|
$b_key = $iv . $key;
|
|
// decrypt string
|
|
$b_fish = new Cipher_blowfish();
|
|
return $b_fish->decrypt($data, $b_key);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Encrypts username and password
|
|
*
|
|
* @param string $username LDAP user name
|
|
* @param string $password LDAP password
|
|
*/
|
|
function encrypt_login($username, $password) {
|
|
// encrypt username and password
|
|
$this->username = base64_encode($this->encrypt($username));
|
|
$this->password = base64_encode($this->encrypt($password));
|
|
}
|
|
|
|
/**
|
|
* Decrypts username and password
|
|
*
|
|
* @return array array(user name, password)
|
|
*/
|
|
function decrypt_login() {
|
|
// decrypt username and password
|
|
$username = $this->decrypt(base64_decode($this->username));
|
|
$password = $this->decrypt(base64_decode($this->password));
|
|
$ret = array($username, $password);
|
|
return $ret;
|
|
}
|
|
|
|
/** Closes connection to LDAP server and deletes encrypted username/password */
|
|
function destroy() {
|
|
$this->close();
|
|
$this->username="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
|
|
$this->password="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
|
|
}
|
|
|
|
|
|
/**
|
|
* Helper function to sort the unit DNs
|
|
*
|
|
* @param string $a first argument to compare
|
|
* @param string $b second argument to compare
|
|
* @return integer 0 if equal, 1 if $a is greater, -1 if $b is greater
|
|
*/
|
|
function cmp_array($a, $b) {
|
|
// split DNs
|
|
$array_a = explode(",", $a);
|
|
$array_b = explode(",", $b);
|
|
$len_a = sizeof($array_a);
|
|
$len_b = sizeof($array_b);
|
|
// check how many parts to compare
|
|
$len = min($len_a, $len_b);
|
|
// compare from last part on
|
|
for ($i = 0; $i < $len; $i++) {
|
|
// get parts to compare
|
|
$part_a = strtolower($array_a[$len_a - $i - 1]);
|
|
$part_b = strtolower($array_b[$len_b - $i - 1]);
|
|
// compare parts
|
|
if ($part_a == $part_b) { // part is identical
|
|
if ($i == ($len - 1)) {
|
|
if ($len_a > $len_b) return 1;
|
|
elseif ($len_a < $len_b) return -1;
|
|
else return 0; // DNs are identical
|
|
}
|
|
}
|
|
elseif ($part_a == max($part_a, $part_b)) return 1;
|
|
else return -1;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Helper function to sort the domains
|
|
*
|
|
* @param string $a first argument to compare
|
|
* @param string $b second argument to compare
|
|
* @return integer 0 if equal, 1 if $a is greater, -1 if $b is greater
|
|
*/
|
|
function cmp_domain($a, $b) {
|
|
if ($a->name == $b->name) return 0;
|
|
elseif ($a->name == max($a->name, $b->name)) return 1;
|
|
else return -1;
|
|
}
|
|
|
|
|
|
}
|
|
|
|
/**
|
|
* Represents a Samba 3 domain entry
|
|
*
|
|
* @package LDAP
|
|
*/
|
|
class samba3domain {
|
|
|
|
/** DN */
|
|
var $dn;
|
|
|
|
/** Domain name */
|
|
var $name;
|
|
|
|
/** Domain SID */
|
|
var $SID;
|
|
|
|
/** Next RID */
|
|
var $nextRID;
|
|
|
|
/** Next user RID */
|
|
var $nextUserRID;
|
|
|
|
/** Next group RID */
|
|
var $nextGroupRID;
|
|
|
|
/** RID base to calculate RIDs, default 1000 */
|
|
var $RIDbase = 1000;
|
|
}
|
|
|
|
?>
|