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ldap.php
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ldap.php
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<?php
/**
* LDAP Password Driver
*
* Driver for passwords stored in LDAP
* This driver use the PEAR Net_LDAP2 class (http://pear.php.net/package/Net_LDAP2).
*
* @version 2.0
* @author Edouard MOREAU <edouard.moreau@ensma.fr>
*
* method hashPassword based on code from the phpLDAPadmin development team (http://phpldapadmin.sourceforge.net/).
* method randomSalt based on code from the phpLDAPadmin development team (http://phpldapadmin.sourceforge.net/).
*
* Copyright (C) 2005-2014, The Roundcube Dev Team
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*/
class rcube_ldap_password
{
public function save($curpass, $passwd)
{
$rcmail = rcmail::get_instance();
require_once 'Net/LDAP2.php';
// Building user DN
if ($userDN = $rcmail->config->get('password_ldap_userDN_mask')) {
$userDN = self::substitute_vars($userDN);
}
else {
$userDN = $this->search_userdn($rcmail);
}
if (empty($userDN)) {
return PASSWORD_CONNECT_ERROR;
}
// Connection Method
switch($rcmail->config->get('password_ldap_method')) {
case 'admin':
$binddn = $rcmail->config->get('password_ldap_adminDN');
$bindpw = $rcmail->config->get('password_ldap_adminPW');
break;
case 'user':
default:
$binddn = $userDN;
$bindpw = $curpass;
break;
}
// Configuration array
$ldapConfig = array (
'binddn' => $binddn,
'bindpw' => $bindpw,
'basedn' => $rcmail->config->get('password_ldap_basedn'),
'host' => $rcmail->config->get('password_ldap_host'),
'port' => $rcmail->config->get('password_ldap_port'),
'starttls' => $rcmail->config->get('password_ldap_starttls'),
'version' => $rcmail->config->get('password_ldap_version'),
);
// Connecting using the configuration array
$ldap = Net_LDAP2::connect($ldapConfig);
// Checking for connection error
if (PEAR::isError($ldap)) {
return PASSWORD_CONNECT_ERROR;
}
$force = $rcmail->config->get('password_ldap_force_replace');
$pwattr = $rcmail->config->get('password_ldap_pwattr');
$lchattr = $rcmail->config->get('password_ldap_lchattr');
$smbpwattr = $rcmail->config->get('password_ldap_samba_pwattr');
$smblchattr = $rcmail->config->get('password_ldap_samba_lchattr');
$samba = $rcmail->config->get('password_ldap_samba');
$encodage = $rcmail->config->get('password_ldap_encodage');
// Support multiple userPassword values where desired.
// multiple encodings can be specified separated by '+' (e.g. "cram-md5+ssha")
$encodages = explode('+', $encodage);
$crypted_pass = array();
foreach ($encodages as $enc) {
$cpw = self::hash_password($passwd, $enc);
if (!empty($cpw)) {
$crypted_pass[] = $cpw;
}
}
// Support password_ldap_samba option for backward compat.
if ($samba && !$smbpwattr) {
$smbpwattr = 'sambaNTPassword';
$smblchattr = 'sambaPwdLastSet';
}
// Crypt new password
if (empty($crypted_pass)) {
return PASSWORD_CRYPT_ERROR;
}
// Crypt new samba password
if ($smbpwattr && !($samba_pass = self::hash_password($passwd, 'samba'))) {
return PASSWORD_CRYPT_ERROR;
}
// Writing new crypted password to LDAP
$userEntry = $ldap->getEntry($userDN);
if (Net_LDAP2::isError($userEntry)) {
return PASSWORD_CONNECT_ERROR;
}
if (!$userEntry->replace(array($pwattr => $crypted_pass), $force)) {
return PASSWORD_CONNECT_ERROR;
}
// Updating PasswordLastChange Attribute if desired
if ($lchattr) {
$current_day = (int)(time() / 86400);
if (!$userEntry->replace(array($lchattr => $current_day), $force)) {
return PASSWORD_CONNECT_ERROR;
}
}
// Update Samba password and last change fields
if ($smbpwattr) {
$userEntry->replace(array($smbpwattr => $samba_pass), $force);
}
// Update Samba password last change field
if ($smblchattr) {
$userEntry->replace(array($smblchattr => time()), $force);
}
if (Net_LDAP2::isError($userEntry->update())) {
return PASSWORD_CONNECT_ERROR;
}
// All done, no error
return PASSWORD_SUCCESS;
}
/**
* Bind with searchDN and searchPW and search for the user's DN.
* Use search_base and search_filter defined in config file.
* Return the found DN.
*/
function search_userdn($rcmail)
{
$binddn = $rcmail->config->get('password_ldap_searchDN');
$bindpw = $rcmail->config->get('password_ldap_searchPW');
$ldapConfig = array (
'basedn' => $rcmail->config->get('password_ldap_basedn'),
'host' => $rcmail->config->get('password_ldap_host'),
'port' => $rcmail->config->get('password_ldap_port'),
'starttls' => $rcmail->config->get('password_ldap_starttls'),
'version' => $rcmail->config->get('password_ldap_version'),
);
// allow anonymous searches
if (!empty($binddn)) {
$ldapConfig['binddn'] = $binddn;
$ldapConfig['bindpw'] = $bindpw;
}
$ldap = Net_LDAP2::connect($ldapConfig);
if (PEAR::isError($ldap)) {
return '';
}
$base = self::substitute_vars($rcmail->config->get('password_ldap_search_base'));
$filter = self::substitute_vars($rcmail->config->get('password_ldap_search_filter'));
$options = array (
'scope' => 'sub',
'attributes' => array(),
);
$result = $ldap->search($base, $filter, $options);
$ldap->done();
if (PEAR::isError($result) || ($result->count() != 1)) {
return '';
}
return $result->current()->dn();
}
/**
* Substitute %login, %name, %domain, %dc in $str
* See plugin config for details
*/
static function substitute_vars($str)
{
$str = str_replace('%login', $_SESSION['username'], $str);
$str = str_replace('%l', $_SESSION['username'], $str);
$parts = explode('@', $_SESSION['username']);
if (count($parts) == 2) {
$dc = 'dc='.strtr($parts[1], array('.' => ',dc=')); // hierarchal domain string
$str = str_replace('%name', $parts[0], $str);
$str = str_replace('%n', $parts[0], $str);
$str = str_replace('%dc', $dc, $str);
$str = str_replace('%domain', $parts[1], $str);
$str = str_replace('%d', $parts[1], $str);
}
return $str;
}
/**
* Code originaly from the phpLDAPadmin development team
* http://phpldapadmin.sourceforge.net/
*
* Hashes a password and returns the hash based on the specified enc_type
*/
static function hash_password($password_clear, $encodage_type)
{
$encodage_type = strtolower($encodage_type);
switch ($encodage_type) {
case 'crypt':
$crypted_password = '{CRYPT}' . crypt($password_clear, self::random_salt(2));
break;
case 'ext_des':
/* Extended DES crypt. see OpenBSD crypt man page */
if (!defined('CRYPT_EXT_DES') || CRYPT_EXT_DES == 0) {
/* Your system crypt library does not support extended DES encryption */
return false;
}
$crypted_password = '{CRYPT}' . crypt($password_clear, '_' . self::random_salt(8));
break;
case 'md5crypt':
if (!defined('CRYPT_MD5') || CRYPT_MD5 == 0) {
/* Your system crypt library does not support md5crypt encryption */
return false;
}
$crypted_password = '{CRYPT}' . crypt($password_clear, '$1$' . self::random_salt(9));
break;
case 'blowfish':
if (!defined('CRYPT_BLOWFISH') || CRYPT_BLOWFISH == 0) {
/* Your system crypt library does not support blowfish encryption */
return false;
}
$rcmail = rcmail::get_instance();
$cost = (int) $rcmail->config->get('password_blowfish_cost');
$cost = $cost < 4 || $cost > 31 ? 12 : $cost;
$prefix = sprintf('$2a$%02d$', $cost);
$crypted_password = '{CRYPT}' . crypt($password_clear, $prefix . self::random_salt(22));
break;
case 'md5':
$crypted_password = '{MD5}' . base64_encode(pack('H*', md5($password_clear)));
break;
case 'sha':
if (function_exists('sha1')) {
/* Use PHP 4.3.0+ sha1 function, if it is available */
$crypted_password = '{SHA}' . base64_encode(pack('H*', sha1($password_clear)));
}
else if (function_exists('hash')) {
$crypted_password = '{SHA}' . base64_encode(hash('sha1', $password_clear, true));
}
else if (function_exists('mhash')) {
$crypted_password = '{SHA}' . base64_encode(mhash(MHASH_SHA1, $password_clear));
}
else {
/* Your PHP install does not have the mhash()/hash() nor sha1() function */
return false;
}
break;
case 'ssha':
mt_srand((double) microtime() * 1000000);
$salt = substr(pack('h*', md5(mt_rand())), 0, 8);
if (function_exists('mhash') && function_exists('mhash_keygen_s2k')) {
$salt = mhash_keygen_s2k(MHASH_SHA1, $password_clear, $salt, 4);
$password = mhash(MHASH_SHA1, $password_clear . $salt);
}
else if (function_exists('sha1')) {
$salt = substr(pack("H*", sha1($salt . $password_clear)), 0, 4);
$password = sha1($password_clear . $salt, true);
}
else if (function_exists('hash')) {
$salt = substr(pack("H*", hash('sha1', $salt . $password_clear)), 0, 4);
$password = hash('sha1', $password_clear . $salt, true);
}
if ($password) {
$crypted_password = '{SSHA}' . base64_encode($password . $salt);
}
else {
/* Your PHP install does not have the mhash()/hash() nor sha1() function */
return false;
}
break;
case 'smd5':
mt_srand((double) microtime() * 1000000);
$salt = substr(pack('h*', md5(mt_rand())), 0, 8);
if (function_exists('mhash') && function_exists('mhash_keygen_s2k')) {
$salt = mhash_keygen_s2k(MHASH_MD5, $password_clear, $salt, 4);
$password = mhash(MHASH_MD5, $password_clear . $salt);
}
else if (function_exists('hash')) {
$salt = substr(pack("H*", hash('md5', $salt . $password_clear)), 0, 4);
$password = hash('md5', $password_clear . $salt, true);
}
else {
$salt = substr(pack("H*", md5($salt . $password_clear)), 0, 4);
$password = md5($password_clear . $salt, true);
}
$crypted_password = '{SMD5}' . base64_encode($password . $salt);
break;
case 'samba':
if (function_exists('hash')) {
$crypted_password = hash('md4', rcube_charset::convert($password_clear, RCUBE_CHARSET, 'UTF-16LE'));
$crypted_password = strtoupper($crypted_password);
}
else {
/* Your PHP install does not have the hash() function */
return false;
}
break;
case 'ad':
$crypted_password = rcube_charset::convert('"' . $password_clear . '"', RCUBE_CHARSET, 'UTF-16LE');
break;
case 'cram-md5':
require_once __DIR__ . '/../helpers/dovecot_hmacmd5.php';
return dovecot_hmacmd5($password_clear);
break;
case 'clear':
default:
$crypted_password = $password_clear;
}
return $crypted_password;
}
/**
* Code originaly from the phpLDAPadmin development team
* http://phpldapadmin.sourceforge.net/
*
* Used to generate a random salt for crypt-style passwords
*/
static function random_salt($length)
{
$possible = '0123456789' . 'abcdefghijklmnopqrstuvwxyz' . 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' . './';
$str = '';
// mt_srand((double)microtime() * 1000000);
while (strlen($str) < $length) {
$str .= substr($possible, (rand() % strlen($possible)), 1);
}
return $str;
}
}

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