Official Addons for the Friendica Communications Platform. (please note that this is a clone of the repository at github, issues are handled there)
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<?php
/**
* Name: LDAP Authenticate
* Description: Authenticate a user against an LDAP directory
* Version: 1.1
* Author: Mike Macgirvin <http://macgirvin.com/profile/mike>
* Author: aymhce
*/
/**
* Friendica addon
*
* Module: LDAP Authenticate
*
* Authenticate a user against an LDAP directory
* Useful for Windows Active Directory and other LDAP-based organisations
* to maintain a single password across the organisation.
*
* Optionally authenticates only if a member of a given group in the directory.
*
* By default, the person must have registered with Friendica using the normal registration
* procedures in order to have a Friendica user record, contact, and profile.
* However, it's possible with an option to automate the creation of a Friendica basic account.
*
* Note when using with Windows Active Directory: you may need to set TLS_CACERT in your site
* ldap.conf file to the signing cert for your LDAP server.
*
* The configuration options for this module may be set in the config/addon.config.php file
* e.g.:
*
* [ldapauth]
* ; ldap hostname server - required
* ldap_server = host.example.com
* ; dn to search users - required
* ldap_searchdn = ou=users,dc=example,dc=com
* ; attribute to find username - required
* ldap_userattr = uid
*
* ; admin dn - optional - only if ldap server dont have anonymous access
* ldap_binddn = cn=admin,dc=example,dc=com
* ; admin password - optional - only if ldap server dont have anonymous access
* ldap_bindpw = password
*
* ; for create Friendica account if user exist in ldap
* ; required an email and a simple (beautiful) nickname on user ldap object
* ; active account creation - optional - default none
* ldap_autocreateaccount = true
* ; attribute to get email - optional - default : 'mail'
* ldap_autocreateaccount_emailattribute = mail
* ; attribute to get nickname - optional - default : 'givenName'
* ldap_autocreateaccount_nameattribute = cn
*
* ...etc.
*/
use Friendica\Core\Hook;
use Friendica\Core\Logger;
use Friendica\Database\DBA;
use Friendica\DI;
use Friendica\Model\User;
use Friendica\Util\ConfigFileLoader;
function ldapauth_install()
{
Hook::register('load_config', 'addon/ldapauth/ldapauth.php', 'ldapauth_load_config');
Hook::register('authenticate', 'addon/ldapauth/ldapauth.php', 'ldapauth_hook_authenticate');
}
function ldapauth_load_config(\Friendica\App $a, ConfigFileLoader $loader)
{
$a->getConfigCache()->load($loader->loadAddonConfig('ldapauth'));
}
function ldapauth_hook_authenticate($a, &$b)
{
$user = ldapauth_authenticate($b['username'], $b['password']);
if (!empty($user['uid'])) {
$b['user_record'] = User::getById($user['uid']);
$b['authenticated'] = 1;
}
}
function ldapauth_authenticate($username, $password)
{
$ldap_server = DI::config()->get('ldapauth', 'ldap_server');
$ldap_binddn = DI::config()->get('ldapauth', 'ldap_binddn');
$ldap_bindpw = DI::config()->get('ldapauth', 'ldap_bindpw');
$ldap_searchdn = DI::config()->get('ldapauth', 'ldap_searchdn');
$ldap_userattr = DI::config()->get('ldapauth', 'ldap_userattr');
$ldap_group = DI::config()->get('ldapauth', 'ldap_group');
$ldap_autocreateaccount = DI::config()->get('ldapauth', 'ldap_autocreateaccount');
$ldap_autocreateaccount_emailattribute = DI::config()->get('ldapauth', 'ldap_autocreateaccount_emailattribute');
$ldap_autocreateaccount_nameattribute = DI::config()->get('ldapauth', 'ldap_autocreateaccount_nameattribute');
if (!extension_loaded('ldap') || !strlen($ldap_server)) {
Logger::error('Addon not configured or missing php-ldap extension', ['extension_loaded' => extension_loaded('ldap'), 'server' => $ldap_server]);
return false;
}
if (!strlen($password)) {
Logger::error('Empty password disallowed', ['provided_password_length' => strlen($password)]);
return false;
}
$connect = @ldap_connect($ldap_server);
if ($connect === false) {
Logger::warning('Could not connect to LDAP server', ['server' => $ldap_server]);
return false;
}
@ldap_set_option($connect, LDAP_OPT_PROTOCOL_VERSION, 3);
@ldap_set_option($connect, LDAP_OPT_REFERRALS, 0);
if ((@ldap_bind($connect, $ldap_binddn, $ldap_bindpw)) === false) {
Logger::warning('Could not bind to LDAP server', ['server' => $ldap_server, 'binddn' => $ldap_binddn, 'errno' => ldap_errno($connect), 'error' => ldap_error($connect)]);
return false;
}
$res = @ldap_search($connect, $ldap_searchdn, $ldap_userattr . '=' . $username);
if (!$res) {
Logger::notice('LDAP user not found.', ['searchdn' => $ldap_searchdn, 'userattr' => $ldap_userattr, 'username' => $username, 'errno' => ldap_errno($connect), 'error' => ldap_error($connect)]);
return false;
}
$id = @ldap_first_entry($connect, $res);
if (!$id) {
Logger::notice('Could not retrieve first LDAP entry.', ['searchdn' => $ldap_searchdn, 'userattr' => $ldap_userattr, 'username' => $username, 'errno' => ldap_errno($connect), 'error' => ldap_error($connect)]);
return false;
}
$dn = @ldap_get_dn($connect, $id);
if (!@ldap_bind($connect, $dn, $password)) {
Logger::notice('Could not authenticate LDAP user with provided password', ['errno' => ldap_errno($connect), 'error' => ldap_error($connect)]);
return false;
}
$emailarray = [];
$namearray = [];
if ($ldap_autocreateaccount == "true") {
if (!strlen($ldap_autocreateaccount_emailattribute)) {
$ldap_autocreateaccount_emailattribute = "mail";
}
if (!strlen($ldap_autocreateaccount_nameattribute)) {
$ldap_autocreateaccount_nameattribute = "givenName";
}
$emailarray = @ldap_get_values($connect, $id, $ldap_autocreateaccount_emailattribute);
$namearray = @ldap_get_values($connect, $id, $ldap_autocreateaccount_nameattribute);
}
if (!strlen($ldap_group)) {
ldap_createaccount($ldap_autocreateaccount, $username, $password, $emailarray[0], $namearray[0]);
return true;
}
$r = @ldap_compare($connect, $ldap_group, 'member', $dn);
if ($r !== true) {
$errno = @ldap_errno($connect);
if ($errno === 32) {
Logger::notice('LDAP Access Control Group does not exist', ['errno' => $errno, 'error' => ldap_error($connect)]);
} elseif ($errno === 16) {
Logger::notice('LDAP membership attribute does not exist in access control group', ['errno' => $errno, 'error' => ldap_error($connect)]);
} else {
Logger::notice('Unexpected LDAP error', ['errno' => $errno, 'error' => ldap_error($connect)]);
}
@ldap_close($connect);
return false;
}
if ($ldap_autocreateaccount == "true" && !DBA::exists('user', ['nickname' => $username])) {
return ldap_createaccount($username, $password, $emailarray[0], $namearray[0]);
}
try {
$authentication = User::getAuthenticationInfo($username);
return User::getById($authentication['uid']);
} catch (Exception $e) {
Logger::notice('LDAP authentication error: ' . $e->getMessage());
return false;
}
}
function ldap_createaccount($username, $password, $email, $name)
{
if (!strlen($email) || !strlen($name)) {
Logger::notice('Could not create local user from LDAP data, no email or nickname provided');
return false;
}
try {
$user = User::create([
'username' => $name,
'nickname' => $username,
'email' => $email,
'password' => $password,
'verified' => 1
]);
Logger::info('Local user created from LDAP data', ['username' => $username, 'name' => $name]);
return $user;
} catch (Exception $ex) {
Logger::error('Could not create local user from LDAP data', ['username' => $username, 'exception' => $ex->getMessage()]);
}
return false;
}