/plugins/pf_password/drivers/ldap.php

<?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)

{

    $cmail = cmail::get_instance();

    require_once ('Net/LDAP2.php');

    

    // Building user DN

    $userDN = str_replace('%login', $_SESSION['username'], $cmail->config->get('password_ldap_userDN_mask'));

    

    $parts = explode('@', $_SESSION['username']);

    if (count($parts) == 2)

    {

        $userDN = str_replace('%name', $parts[0], $userDN);

        $userDN = str_replace('%domain', $parts[1], $userDN);

    }



    if (empty($userDN)) {return PASSWORD_CONNECT_ERROR;}

    

    // Connection Method

    switch($cmail->config->get('password_ldap_method')) {

        case 'user': $binddn = $userDN; $bindpw = $curpass; break;

        case 'admin': $binddn = $cmail->config->get('password_ldap_adminDN'); $bindpw = $cmail->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'    => $cmail->config->get('password_ldap_basedn'),

        'host'      => $cmail->config->get('password_ldap_host'),

        'port'      => $cmail->config->get('password_ldap_port'),

        'starttls'  => $cmail->config->get('password_ldap_starttls'),

        'version'   => $cmail->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, $cmail->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 (!$userEntry->replace(array($cmail->config->get('password_ldap_pwattr') => $newCryptedPassword),$cmail->config->get('password_ldap_force_replace'))) {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;

}



?>