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-rw-r--r--plugins/LdapAuthentication/LdapAuthenticationPlugin.php331
-rw-r--r--plugins/LdapAuthentication/README82
2 files changed, 413 insertions, 0 deletions
diff --git a/plugins/LdapAuthentication/LdapAuthenticationPlugin.php b/plugins/LdapAuthentication/LdapAuthenticationPlugin.php
new file mode 100644
index 000000000..8caacff46
--- /dev/null
+++ b/plugins/LdapAuthentication/LdapAuthenticationPlugin.php
@@ -0,0 +1,331 @@
+<?php
+/**
+ * StatusNet, the distributed open-source microblogging tool
+ *
+ * Plugin to enable LDAP Authentication
+ *
+ * PHP version 5
+ *
+ * LICENCE: This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @category Plugin
+ * @package StatusNet
+ * @author Craig Andrews <candrews@integralblue.com>
+ * @copyright 2009 Craig Andrews http://candrews.integralblue.com
+ * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link http://status.net/
+ */
+
+if (!defined('STATUSNET') && !defined('LACONICA')) {
+ exit(1);
+}
+
+require_once INSTALLDIR.'/plugins/Authentication/AuthenticationPlugin.php';
+require_once 'Net/LDAP2.php';
+
+class LdapAuthenticationPlugin extends AuthenticationPlugin
+{
+ public $host=null;
+ public $port=null;
+ public $version=null;
+ public $starttls=null;
+ public $binddn=null;
+ public $bindpw=null;
+ public $basedn=null;
+ public $options=null;
+ public $filter=null;
+ public $scope=null;
+ public $password_encoding=null;
+ public $attributes=array();
+
+ function onInitializePlugin(){
+ parent::onInitializePlugin();
+ if(!isset($this->host)){
+ throw new Exception("must specify a host");
+ }
+ if(!isset($this->basedn)){
+ throw new Exception("must specify a basedn");
+ }
+ if(!isset($this->attributes['nickname'])){
+ throw new Exception("must specify a nickname attribute");
+ }
+ if(!isset($this->attributes['username'])){
+ throw new Exception("must specify a username attribute");
+ }
+ if($this->password_changeable && (! isset($this->attributes['password']) || !isset($this->password_encoding))){
+ throw new Exception("if password_changeable is set, the password attribute and password_encoding must also be specified");
+ }
+ }
+
+ //---interface implementation---//
+
+ function checkPassword($username, $password)
+ {
+ $entry = $this->ldap_get_user($username);
+ if(!$entry){
+ return false;
+ }else{
+ $config = $this->ldap_get_config();
+ $config['binddn']=$entry->dn();
+ $config['bindpw']=$password;
+ if($this->ldap_get_connection($config)){
+ return true;
+ }else{
+ return false;
+ }
+ }
+ }
+
+ function autoRegister($username)
+ {
+ $entry = $this->ldap_get_user($username,$this->attributes);
+ if($entry){
+ $registration_data = array();
+ foreach($this->attributes as $sn_attribute=>$ldap_attribute){
+ $registration_data[$sn_attribute]=$entry->getValue($ldap_attribute,'single');
+ }
+ if(isset($registration_data['email']) && !empty($registration_data['email'])){
+ $registration_data['email_confirmed']=true;
+ }
+ //set the database saved password to a random string.
+ $registration_data['password']=common_good_rand(16);
+ return User::register($registration_data);
+ }else{
+ //user isn't in ldap, so we cannot register him
+ return false;
+ }
+ }
+
+ function changePassword($username,$oldpassword,$newpassword)
+ {
+ if(! isset($this->attributes['password']) || !isset($this->password_encoding)){
+ //throw new Exception(_('Sorry, changing LDAP passwords is not supported at this time'));
+ return false;
+ }
+ $entry = $this->ldap_get_user($username);
+ if(!$entry){
+ return false;
+ }else{
+ $config = $this->ldap_get_config();
+ $config['binddn']=$entry->dn();
+ $config['bindpw']=$oldpassword;
+ if($ldap = $this->ldap_get_connection($config)){
+ $entry = $this->ldap_get_user($username,array(),$ldap);
+
+ $newCryptedPassword = $this->hashPassword($newpassword, $this->password_encoding);
+ if ($newCryptedPassword===false) {
+ return false;
+ }
+ if($this->password_encoding=='ad') {
+ //TODO I believe this code will work once this bug is fixed: http://pear.php.net/bugs/bug.php?id=16796
+ $oldCryptedPassword = $this->hashPassword($oldpassword, $this->password_encoding);
+ $entry->delete( array($this->attributes['password'] => $oldCryptedPassword ));
+ }
+ $entry->replace( array($this->attributes['password'] => $newCryptedPassword ), true);
+ if( Net_LDAP2::isError($entry->upate()) ) {
+ return false;
+ }
+ return true;
+ }else{
+ return false;
+ }
+ }
+
+ return false;
+ }
+
+ //---utility functions---//
+ function ldap_get_config(){
+ $config = array();
+ $keys = array('host','port','version','starttls','binddn','bindpw','basedn','options','filter','scope');
+ foreach($keys as $key){
+ $value = $this->$key;
+ if($value!==null){
+ $config[$key]=$value;
+ }
+ }
+ return $config;
+ }
+
+ function ldap_get_connection($config = null){
+ if($config == null && isset($this->default_ldap)){
+ return $this->default_ldap;
+ }
+
+ //cannot use Net_LDAP2::connect() as StatusNet uses
+ //PEAR::setErrorHandling(PEAR_ERROR_CALLBACK, 'handleError');
+ //PEAR handling can be overridden on instance objects, so we do that.
+ $ldap = new Net_LDAP2(isset($config)?$config:$this->ldap_get_config());
+ $ldap->setErrorHandling(PEAR_ERROR_RETURN);
+ $err=$ldap->bind();
+ if (Net_LDAP2::isError($err)) {
+ common_log(LOG_WARNING, 'Could not connect to LDAP server: '.$err->getMessage());
+ return false;
+ }
+ if($config == null) $this->default_ldap=$ldap;
+ return $ldap;
+ }
+
+ /**
+ * get an LDAP entry for a user with a given username
+ *
+ * @param string $username
+ * $param array $attributes LDAP attributes to retrieve
+ * @return string DN
+ */
+ function ldap_get_user($username,$attributes=array(),$ldap=null){
+ if($ldap==null) {
+ $ldap = $this->ldap_get_connection();
+ }
+ $filter = Net_LDAP2_Filter::create($this->attributes['username'], 'equals', $username);
+ $options = array(
+ 'attributes' => $attributes
+ );
+ $search = $ldap->search(null,$filter,$options);
+
+ if (PEAR::isError($search)) {
+ common_log(LOG_WARNING, 'Error while getting DN for user: '.$search->getMessage());
+ return false;
+ }
+
+ if($search->count()==0){
+ return false;
+ }else if($search->count()==1){
+ $entry = $search->shiftEntry();
+ return $entry;
+ }else{
+ common_log(LOG_WARNING, 'Found ' . $search->count() . ' ldap user with the username: ' . $username);
+ return false;
+ }
+ }
+
+ /**
+ * 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,$this->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, '_' . $this->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 , '$1$' . $this->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$12$' . $this->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 'ad':
+ $cryptedPassword = '';
+ $passwordClear = "\"" . $passwordClear . "\"";
+ $len = strlen($passwordClear);
+ for ($i = 0; $i < $len; $i++) {
+ $cryptedPassword .= "{$passwordClear{$i}}\000";
+ }
+
+ 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;
+ }
+}
diff --git a/plugins/LdapAuthentication/README b/plugins/LdapAuthentication/README
new file mode 100644
index 000000000..2226159c2
--- /dev/null
+++ b/plugins/LdapAuthentication/README
@@ -0,0 +1,82 @@
+The LDAP Authentication plugin allows for StatusNet to handle authentication
+through LDAP.
+
+Installation
+============
+add "addPlugin('ldapAuthentication',
+ array('setting'=>'value', 'setting2'=>'value2', ...);"
+to the bottom of your config.php
+
+Settings
+========
+provider_name*: a unique name for this authentication provider.
+authoritative (false): Set to true if LDAP's responses are authoritative
+ (if authorative and LDAP fails, no other password checking will be done).
+autoregistration (false): Set to true if users should be automatically created
+ when they attempt to login.
+email_changeable (true): Are users allowed to change their email address?
+ (true or false)
+password_changeable (true): Are users allowed to change their passwords?
+ (true or false)
+password_encoding: required if users are to be able to change their passwords
+ Possible values are: crypt, ext_des, md5crypt, blowfish, md5, sha, ssha,
+ smd5, ad, clear
+
+host*: LDAP server name to connect to. You can provide several hosts in an
+ array in which case the hosts are tried from left to right.
+ See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php
+port: Port on the server.
+ See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php
+version: LDAP version.
+ See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php
+starttls: TLS is started after connecting.
+ See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php
+binddn: The distinguished name to bind as (username).
+ See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php
+bindpw: Password for the binddn.
+ See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php
+basedn*: LDAP base name (root directory).
+ See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php
+options: See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php
+filter: Default search filter.
+ See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php
+scope: Default search scope.
+ See http://pear.php.net/manual/en/package.networking.net-ldap2.connecting.php
+
+attributes: an array that relates StatusNet user attributes to LDAP ones
+ username*: LDAP attribute value entered when authenticating to StatusNet
+ nickname*: LDAP attribute value shown as the user's nickname
+ email
+ fullname
+ homepage
+ location
+ password: required if users are to be able to change their passwords
+
+* required
+default values are in (parenthesis)
+
+For most LDAP installations, the "nickname" and "username" attributes should
+ be the same.
+
+Example
+=======
+Here's an example of an LDAP plugin configuration that connects to
+ Microsoft Active Directory.
+
+addPlugin('ldapAuthentication', array(
+ 'provider_name'=>'Example',
+ 'authoritative'=>true,
+ 'autoregistration'=>true,
+ 'binddn'=>'username',
+ 'bindpw'=>'password',
+ 'basedn'=>'OU=Users,OU=StatusNet,OU=US,DC=americas,DC=global,DC=loc',
+ 'host'=>array('server1', 'server2'),
+ 'password_encoding'=>'ad',
+ 'attributes'=>array(
+ 'username'=>'sAMAccountName',
+ 'nickname'=>'sAMAccountName',
+ 'email'=>'mail',
+ 'fullname'=>'displayName',
+ 'password'=>'unicodePwd')
+));
+