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