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320 lines
12 KiB
PHP
320 lines
12 KiB
PHP
<?php
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/**
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* LDAP Password Driver
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*
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* Driver for passwords stored in LDAP
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* This driver use the PEAR Net_LDAP2 class (http://pear.php.net/package/Net_LDAP2).
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*
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* @version 2.0
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* @author Edouard MOREAU <edouard.moreau@ensma.fr>
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*
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* method hashPassword based on code from the phpLDAPadmin development team (http://phpldapadmin.sourceforge.net/).
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* method randomSalt based on code from the phpLDAPadmin development team (http://phpldapadmin.sourceforge.net/).
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*
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*/
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class rcube_ldap_password
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{
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public function save($curpass, $passwd)
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{
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$rcmail = rcmail::get_instance();
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require_once 'Net/LDAP2.php';
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// Building user DN
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if ($userDN = $rcmail->config->get('password_ldap_userDN_mask')) {
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$userDN = $this->substitute_vars($userDN);
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} else {
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$userDN = $this->search_userdn($rcmail);
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}
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if (empty($userDN)) {
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return PASSWORD_CONNECT_ERROR;
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}
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// Connection Method
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switch($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 = $userDN;
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$bindpw = $curpass;
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break;
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}
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// Configuration array
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$ldapConfig = array (
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'binddn' => $binddn,
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'bindpw' => $bindpw,
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'basedn' => $rcmail->config->get('password_ldap_basedn'),
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'host' => $rcmail->config->get('password_ldap_host'),
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'port' => $rcmail->config->get('password_ldap_port'),
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'starttls' => $rcmail->config->get('password_ldap_starttls'),
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'version' => $rcmail->config->get('password_ldap_version'),
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);
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// Connecting using the configuration array
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$ldap = Net_LDAP2::connect($ldapConfig);
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// Checking for connection error
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if (PEAR::isError($ldap)) {
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return PASSWORD_CONNECT_ERROR;
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}
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$crypted_pass = $this->hashPassword($passwd, $rcmail->config->get('password_ldap_encodage'));
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$force = $rcmail->config->get('password_ldap_force_replace');
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$pwattr = $rcmail->config->get('password_ldap_pwattr');
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$lchattr = $rcmail->config->get('password_ldap_lchattr');
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$smbpwattr = $rcmail->config->get('password_ldap_samba_pwattr');
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$smblchattr = $rcmail->config->get('password_ldap_samba_lchattr');
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$samba = $rcmail->config->get('password_ldap_samba');
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// Support password_ldap_samba option for backward compat.
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if ($samba && !$smbpwattr) {
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$smbpwattr = 'sambaNTPassword';
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$smblchattr = 'sambaPwdLastSet';
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}
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// Crypt new password
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if (!$crypted_pass) {
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return PASSWORD_CRYPT_ERROR;
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}
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// Crypt new samba password
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if ($smbpwattr && !($samba_pass = $this->hashPassword($passwd, 'samba'))) {
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return PASSWORD_CRYPT_ERROR;
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}
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// Writing new crypted password to LDAP
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$userEntry = $ldap->getEntry($userDN);
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if (Net_LDAP2::isError($userEntry)) {
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return PASSWORD_CONNECT_ERROR;
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}
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if (!$userEntry->replace(array($pwattr => $crypted_pass), $force)) {
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return PASSWORD_CONNECT_ERROR;
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}
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// Updating PasswordLastChange Attribute if desired
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if ($lchattr) {
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$current_day = (int)(time() / 86400);
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if (!$userEntry->replace(array($lchattr => $current_day), $force)) {
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return PASSWORD_CONNECT_ERROR;
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}
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}
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// Update Samba password and last change fields
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if ($smbpwattr) {
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$userEntry->replace(array($smbpwattr => $samba_pass), $force);
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}
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// Update Samba password last change field
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if ($smblchattr) {
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$userEntry->replace(array($smblchattr => time()), $force);
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}
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if (Net_LDAP2::isError($userEntry->update())) {
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return PASSWORD_CONNECT_ERROR;
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}
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// All done, no error
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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 search_userdn($rcmail)
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{
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$ldapConfig = array (
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'binddn' => $rcmail->config->get('password_ldap_searchDN'),
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'bindpw' => $rcmail->config->get('password_ldap_searchPW'),
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'basedn' => $rcmail->config->get('password_ldap_basedn'),
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'host' => $rcmail->config->get('password_ldap_host'),
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'port' => $rcmail->config->get('password_ldap_port'),
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'starttls' => $rcmail->config->get('password_ldap_starttls'),
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'version' => $rcmail->config->get('password_ldap_version'),
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);
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$ldap = Net_LDAP2::connect($ldapConfig);
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if (PEAR::isError($ldap)) {
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return '';
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}
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$base = $rcmail->config->get('password_ldap_search_base');
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$filter = $this->substitute_vars($rcmail->config->get('password_ldap_search_filter'));
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$options = array (
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'scope' => 'sub',
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'attributes' => array(),
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);
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$result = $ldap->search($base, $filter, $options);
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$ldap->done();
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if (PEAR::isError($result) || ($result->count() != 1)) {
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return '';
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}
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return $result->current()->dn();
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}
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/**
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* Substitute %login, %name, %domain, %dc in $str.
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* See plugin config for details.
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*/
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function substitute_vars($str)
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{
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$rcmail = rcmail::get_instance();
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$domain = $rcmail->user->get_username('domain');
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$dc = 'dc='.strtr($domain, array('.' => ',dc=')); // hierarchal domain string
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$str = str_replace(array(
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'%login',
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'%name',
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'%domain',
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'%dc',
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), array(
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$_SESSION['username'],
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$rcmail->user->get_username('local'),
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$domain,
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$dc,
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), $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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* @param string $passwordClear The password to hash in clear text.
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* @param string $encodageType Standard LDAP encryption type which must be one of
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* crypt, ext_des, md5crypt, blowfish, md5, sha, smd5, ssha, or clear.
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* @return string The hashed password.
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*
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*/
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function hashPassword( $passwordClear, $encodageType )
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{
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$encodageType = strtolower( $encodageType );
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switch( $encodageType ) {
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case 'crypt':
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$cryptedPassword = '{CRYPT}' . crypt($passwordClear, $this->randomSalt(2));
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break;
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case 'ext_des':
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// extended des crypt. see OpenBSD crypt man page.
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if ( ! defined( 'CRYPT_EXT_DES' ) || CRYPT_EXT_DES == 0 ) {
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// Your system crypt library does not support extended DES encryption.
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return FALSE;
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}
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$cryptedPassword = '{CRYPT}' . crypt( $passwordClear, '_' . $this->randomSalt(8) );
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break;
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case 'md5crypt':
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if( ! defined( 'CRYPT_MD5' ) || CRYPT_MD5 == 0 ) {
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// Your system crypt library does not support md5crypt encryption.
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return FALSE;
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}
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$cryptedPassword = '{CRYPT}' . crypt( $passwordClear , '$1$' . $this->randomSalt(9) );
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break;
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case 'blowfish':
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if( ! defined( 'CRYPT_BLOWFISH' ) || CRYPT_BLOWFISH == 0 ) {
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// Your system crypt library does not support blowfish encryption.
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return FALSE;
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}
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// hardcoded to second blowfish version and set number of rounds
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$cryptedPassword = '{CRYPT}' . crypt( $passwordClear , '$2a$12$' . $this->randomSalt(13) );
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break;
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case 'md5':
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$cryptedPassword = '{MD5}' . base64_encode( pack( 'H*' , md5( $passwordClear) ) );
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break;
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case 'sha':
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if( function_exists('sha1') ) {
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// use php 4.3.0+ sha1 function, if it is available.
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$cryptedPassword = '{SHA}' . base64_encode( pack( 'H*' , sha1( $passwordClear) ) );
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} elseif( function_exists( 'mhash' ) ) {
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$cryptedPassword = '{SHA}' . base64_encode( mhash( MHASH_SHA1, $passwordClear) );
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} else {
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return FALSE; //Your PHP install does not have the mhash() function. Cannot do SHA hashes.
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}
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break;
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case 'ssha':
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if( function_exists( 'mhash' ) && function_exists( 'mhash_keygen_s2k' ) ) {
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mt_srand( (double) microtime() * 1000000 );
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$salt = mhash_keygen_s2k( MHASH_SHA1, $passwordClear, substr( pack( 'h*', md5( mt_rand() ) ), 0, 8 ), 4 );
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$cryptedPassword = '{SSHA}'.base64_encode( mhash( MHASH_SHA1, $passwordClear.$salt ).$salt );
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} else {
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return FALSE; //Your PHP install does not have the mhash() function. Cannot do SHA hashes.
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}
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break;
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case 'smd5':
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if( function_exists( 'mhash' ) && function_exists( 'mhash_keygen_s2k' ) ) {
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mt_srand( (double) microtime() * 1000000 );
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$salt = mhash_keygen_s2k( MHASH_MD5, $passwordClear, substr( pack( 'h*', md5( mt_rand() ) ), 0, 8 ), 4 );
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$cryptedPassword = '{SMD5}'.base64_encode( mhash( MHASH_MD5, $passwordClear.$salt ).$salt );
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} else {
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return FALSE; //Your PHP install does not have the mhash() function. Cannot do SHA hashes.
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}
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break;
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case 'samba':
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if (function_exists('hash')) {
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$cryptedPassword = hash('md4', rcube_charset::convert($passwordClear, RCUBE_CHARSET, 'UTF-16LE'));
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$cryptedPassword = strtoupper($cryptedPassword);
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} else {
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/* Your PHP install does not have the hash() function */
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return false;
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}
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break;
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case 'clear':
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default:
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$cryptedPassword = $passwordClear;
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}
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return $cryptedPassword;
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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. Salt strings are used
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* to make pre-built hash cracking dictionaries difficult to use as the hash algorithm uses
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* not only the user's password but also a randomly generated string. The string is
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* stored as the first N characters of the hash for reference of hashing algorithms later.
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*
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* --- added 20021125 by bayu irawan <bayuir@divnet.telkom.co.id> ---
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* --- ammended 20030625 by S C Rigler <srigler@houston.rr.com> ---
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*
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* @param int $length The length of the salt string to generate.
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* @return string The generated salt string.
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*/
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function randomSalt( $length )
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{
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$possible = '0123456789'.
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'abcdefghijklmnopqrstuvwxyz'.
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'ABCDEFGHIJKLMNOPQRSTUVWXYZ'.
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'./';
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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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return $str;
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}
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}
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