<?php
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/**
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* Simple LDAP Password Driver
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*
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* Driver for passwords stored in LDAP
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* This driver is based on Edouard's LDAP Password Driver, but does not
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* require PEAR's Net_LDAP2 to be installed
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*
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* @version 1.0 (2010-07-31)
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* @author Wout Decre <wout@canodus.be>
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*/
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function password_save($curpass, $passwd)
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{
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$rcmail = rcmail::get_instance();
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/* Connect */
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if (!$ds = ldap_connect($rcmail->config->get('password_ldap_host'), $rcmail->config->get('password_ldap_port'))) {
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ldap_unbind($ds);
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return PASSWORD_CONNECT_ERROR;
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}
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/* Set protocol version */
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if (!ldap_set_option($ds, LDAP_OPT_PROTOCOL_VERSION, $rcmail->config->get('password_ldap_version'))) {
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ldap_unbind($ds);
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return PASSWORD_CONNECT_ERROR;
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}
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/* Start TLS */
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if ($rcmail->config->get('password_ldap_starttls')) {
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if (!ldap_start_tls($ds)) {
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ldap_unbind($ds);
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return PASSWORD_CONNECT_ERROR;
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}
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}
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/* Build user DN */
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if ($user_dn = $rcmail->config->get('password_ldap_userDN_mask')) {
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$user_dn = ldap_simple_substitute_vars($user_dn);
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} else {
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$user_dn = ldap_simple_search_userdn($rcmail, $ds);
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}
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if (empty($user_dn)) {
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ldap_unbind($ds);
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return PASSWORD_CONNECT_ERROR;
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}
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/* Connection method */
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switch ($rcmail->config->get('password_ldap_method')) {
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case 'admin':
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$binddn = $rcmail->config->get('password_ldap_adminDN');
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$bindpw = $rcmail->config->get('password_ldap_adminPW');
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break;
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case 'user':
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default:
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$binddn = $user_dn;
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$bindpw = $curpass;
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break;
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}
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/* Bind */
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if (!ldap_bind($ds, $binddn, $bindpw)) {
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ldap_unbind($ds);
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return PASSWORD_CONNECT_ERROR;
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}
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/* Crypting new password */
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$passwd = ldap_simple_hash_password($passwd, $rcmail->config->get('password_ldap_encodage'));
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if (!$passwd) {
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ldap_unbind($ds);
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return PASSWORD_CRYPT_ERROR;
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}
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$entree[$rcmail->config->get('password_ldap_pwattr')] = $passwd;
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/* Updating PasswordLastChange Attribute if desired */
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if ($lchattr = $rcmail->config->get('password_ldap_lchattr')) {
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$entree[$lchattr] = (int)(time() / 86400);
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}
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if (!ldap_modify($ds, $user_dn, $entree)) {
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ldap_unbind($ds);
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return PASSWORD_CONNECT_ERROR;
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}
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/* All done, no error */
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ldap_unbind($ds);
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return PASSWORD_SUCCESS;
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}
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/**
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* Bind with searchDN and searchPW and search for the user's DN
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* Use search_base and search_filter defined in config file
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* Return the found DN
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*/
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function ldap_simple_search_userdn($rcmail, $ds)
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{
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/* Bind */
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if (!ldap_bind($ds, $rcmail->config->get('password_ldap_searchDN'), $rcmail->config->get('password_ldap_searchPW'))) {
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return false;
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}
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/* Search for the DN */
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if (!$sr = ldap_search($ds, $rcmail->config->get('password_ldap_search_base'), ldap_simple_substitute_vars($rcmail->config->get('password_ldap_search_filter')))) {
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return false;
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}
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/* If no or more entries were found, return false */
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if (ldap_count_entries($ds, $sr) != 1) {
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return false;
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}
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return ldap_get_dn($ds, ldap_first_entry($ds, $sr));
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}
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/**
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* Substitute %login, %name, %domain, %dc in $str
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* See plugin config for details
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*/
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function ldap_simple_substitute_vars($str)
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{
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$str = str_replace('%login', $_SESSION['username'], $str);
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$str = str_replace('%l', $_SESSION['username'], $str);
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$parts = explode('@', $_SESSION['username']);
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if (count($parts) == 2) {
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$dc = 'dc='.strtr($parts[1], array('.' => ',dc=')); // hierarchal domain string
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$str = str_replace('%name', $parts[0], $str);
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$str = str_replace('%n', $parts[0], $str);
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$str = str_replace('%dc', $dc, $str);
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$str = str_replace('%domain', $parts[1], $str);
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$str = str_replace('%d', $parts[1], $str);
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}
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return $str;
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}
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/**
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* Code originaly from the phpLDAPadmin development team
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* http://phpldapadmin.sourceforge.net/
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*
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* Hashes a password and returns the hash based on the specified enc_type
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*/
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function ldap_simple_hash_password($password_clear, $encodage_type)
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{
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$encodage_type = strtolower($encodage_type);
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switch ($encodage_type) {
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case 'crypt':
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$crypted_password = '{CRYPT}' . crypt($password_clear, ldap_simple_random_salt(2));
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break;
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case 'ext_des':
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/* Extended DES crypt. see OpenBSD crypt man page */
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if (!defined('CRYPT_EXT_DES') || CRYPT_EXT_DES == 0) {
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/* Your system crypt library does not support extended DES encryption */
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return false;
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}
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$crypted_password = '{CRYPT}' . crypt($password_clear, '_' . ldap_simple_random_salt(8));
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break;
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case 'md5crypt':
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if (!defined('CRYPT_MD5') || CRYPT_MD5 == 0) {
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/* Your system crypt library does not support md5crypt encryption */
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return false;
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}
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$crypted_password = '{CRYPT}' . crypt($password_clear, '$1$' . ldap_simple_random_salt(9));
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break;
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case 'blowfish':
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if (!defined('CRYPT_BLOWFISH') || CRYPT_BLOWFISH == 0) {
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/* Your system crypt library does not support blowfish encryption */
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return false;
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}
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/* Hardcoded to second blowfish version and set number of rounds */
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$crypted_password = '{CRYPT}' . crypt($password_clear, '$2a$12$' . ldap_simple_random_salt(13));
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break;
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case 'md5':
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$crypted_password = '{MD5}' . base64_encode(pack('H*', md5($password_clear)));
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break;
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case 'sha':
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if (function_exists('sha1')) {
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/* Use PHP 4.3.0+ sha1 function, if it is available */
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$crypted_password = '{SHA}' . base64_encode(pack('H*', sha1($password_clear)));
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} else if (function_exists('mhash')) {
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$crypted_password = '{SHA}' . base64_encode(mhash(MHASH_SHA1, $password_clear));
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} else {
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/* Your PHP install does not have the mhash() function */
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return false;
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}
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break;
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case 'ssha':
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if (function_exists('mhash') && function_exists('mhash_keygen_s2k')) {
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mt_srand((double) microtime() * 1000000 );
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$salt = mhash_keygen_s2k(MHASH_SHA1, $password_clear, substr(pack('h*', md5(mt_rand())), 0, 8), 4);
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$crypted_password = '{SSHA}' . base64_encode(mhash(MHASH_SHA1, $password_clear . $salt) . $salt);
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} else {
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/* Your PHP install does not have the mhash() function */
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return false;
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}
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break;
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case 'smd5':
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if (function_exists('mhash') && function_exists('mhash_keygen_s2k')) {
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mt_srand((double) microtime() * 1000000 );
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$salt = mhash_keygen_s2k(MHASH_MD5, $password_clear, substr(pack('h*', md5(mt_rand())), 0, 8), 4);
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$crypted_password = '{SMD5}' . base64_encode(mhash(MHASH_MD5, $password_clear . $salt) . $salt);
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} else {
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/* Your PHP install does not have the mhash() function */
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return false;
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}
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break;
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case 'clear':
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default:
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$crypted_password = $password_clear;
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}
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return $crypted_password;
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}
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/**
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* Code originaly from the phpLDAPadmin development team
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* http://phpldapadmin.sourceforge.net/
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*
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* Used to generate a random salt for crypt-style passwords
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*/
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function ldap_simple_random_salt($length)
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{
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$possible = '0123456789' . 'abcdefghijklmnopqrstuvwxyz' . 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' . './';
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$str = '';
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// mt_srand((double)microtime() * 1000000);
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while (strlen($str) < $length) {
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$str .= substr($possible, (rand() % strlen($possible)), 1);
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}
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return $str;
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}
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