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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 1.0 (2009-06-24)
* @author Edouard MOREAU <edouard.moreau@ensma.fr>
*
* function hashPassword based on code from the phpLDAPadmin development team (http://phpldapadmin.sourceforge.net/).
* function randomSalt based on code from the phpLDAPadmin development team (http://phpldapadmin.sourceforge.net/).
*
*/
function password_save($curpass, $passwd)
{
$rcmail = rcmail::get_instance();
require_once ('Net/LDAP2.php');
// Building user DN
$userDN = str_replace('%login', $_SESSION['username'], $rcmail->config->get('password_ldap_userDN_mask'));
if (empty($userDN)) {return PASSWORD_CONNECT_ERROR;}
// Connection Method
switch($rcmail->config->get('password_ldap_method')) {
case 'user': $binddn = $userDN; $bindpw = $curpass; break;
case 'admin': $binddn = $rcmail->config->get('password_ldap_adminDN'); $bindpw = $rcmail->config->get('password_ldap_adminPW'); break;
default: $binddn = $userDN; $bindpw = $curpass; break; // default is user mode
}
// 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;}
// Crypting new password
$newCryptedPassword = hashPassword($passwd, $rcmail->config->get('password_ldap_encodage'));
if (!$newCryptedPassword) {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($rcmail->config->get('password_ldap_pwattr') => $newCryptedPassword))) {return PASSWORD_CONNECT_ERROR;}
if (Net_LDAP2::isError($userEntry->update())) {return PASSWORD_CONNECT_ERROR;}
// All done, no error
return PASSWORD_SUCCESS;
}
/**
* Code originaly from the phpLDAPadmin development team
* http://phpldapadmin.sourceforge.net/
*
* Hashes a password and returns the hash based on the specified enc_type.
*
* @param string $passwordClear The password to hash in clear text.
* @param string $encodageType Standard LDAP encryption type which must be one of
* crypt, ext_des, md5crypt, blowfish, md5, sha, smd5, ssha, or clear.
* @return string The hashed password.
*
*/
function hashPassword( $passwordClear, $encodageType )
{
$encodageType = strtolower( $encodageType );
switch( $encodageType ) {
case 'crypt':
$cryptedPassword = '{CRYPT}' . crypt($passwordClear,randomSalt(2));
break;
case 'ext_des':
// extended des crypt. see OpenBSD crypt man page.
if ( ! defined( 'CRYPT_EXT_DES' ) || CRYPT_EXT_DES == 0 ) {return FALSE;} //Your system crypt library does not support extended DES encryption.
$cryptedPassword = '{CRYPT}' . crypt( $passwordClear, '_' . randomSalt(8) );
break;
case 'md5crypt':
if( ! defined( 'CRYPT_MD5' ) || CRYPT_MD5 == 0 ) {return FALSE;} //Your system crypt library does not support md5crypt encryption.
$cryptedPassword = '{CRYPT}' . crypt( $passwordClear , '$1$' . randomSalt(9) );
break;
case 'blowfish':
if( ! defined( 'CRYPT_BLOWFISH' ) || CRYPT_BLOWFISH == 0 ) {return FALSE;} //Your system crypt library does not support blowfish encryption.
$cryptedPassword = '{CRYPT}' . crypt( $passwordClear , '$2a$12$' . randomSalt(13) ); // hardcoded to second blowfish version and set number of rounds
break;
case 'md5':
$cryptedPassword = '{MD5}' . base64_encode( pack( 'H*' , md5( $passwordClear) ) );
break;
case 'sha':
if( function_exists('sha1') ) {
// use php 4.3.0+ sha1 function, if it is available.
$cryptedPassword = '{SHA}' . base64_encode( pack( 'H*' , sha1( $passwordClear) ) );
} elseif( function_exists( 'mhash' ) ) {
$cryptedPassword = '{SHA}' . base64_encode( mhash( MHASH_SHA1, $passwordClear) );
} else {
return FALSE; //Your PHP install does not have the mhash() function. Cannot do SHA hashes.
}
break;
case 'ssha':
if( function_exists( 'mhash' ) && function_exists( 'mhash_keygen_s2k' ) ) {
mt_srand( (double) microtime() * 1000000 );
$salt = mhash_keygen_s2k( MHASH_SHA1, $passwordClear, substr( pack( "h*", md5( mt_rand() ) ), 0, 8 ), 4 );
$cryptedPassword = "{SSHA}".base64_encode( mhash( MHASH_SHA1, $passwordClear.$salt ).$salt );
} else {
return FALSE; //Your PHP install does not have the mhash() function. Cannot do SHA hashes.
}
break;
case 'smd5':
if( function_exists( 'mhash' ) && function_exists( 'mhash_keygen_s2k' ) ) {
mt_srand( (double) microtime() * 1000000 );
$salt = mhash_keygen_s2k( MHASH_MD5, $passwordClear, substr( pack( "h*", md5( mt_rand() ) ), 0, 8 ), 4 );
$cryptedPassword = "{SMD5}".base64_encode( mhash( MHASH_MD5, $passwordClear.$salt ).$salt );
} else {
return FALSE; //Your PHP install does not have the mhash() function. Cannot do SHA hashes.
}
break;
case 'clear':
default:
$cryptedPassword = $passwordClear;
}
return $cryptedPassword;
}
/**
* Code originaly from the phpLDAPadmin development team
* http://phpldapadmin.sourceforge.net/
*
* Used to generate a random salt for crypt-style passwords. Salt strings are used
* to make pre-built hash cracking dictionaries difficult to use as the hash algorithm uses
* not only the user's password but also a randomly generated string. The string is
* stored as the first N characters of the hash for reference of hashing algorithms later.
*
* --- added 20021125 by bayu irawan <bayuir@divnet.telkom.co.id> ---
* --- ammended 20030625 by S C Rigler <srigler@houston.rr.com> ---
*
* @param int $length The length of the salt string to generate.
* @return string The generated salt string.
*/
function randomSalt( $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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