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<?php /* Copyright (c) 2024 Freya Murphy */
class LDAPHelper {
private ?\LDAP\Connection $conn;
private array $env;
private array $matchers;
private ?string $bound;
function __construct() {
$this->env = array(
# ldap host
'url' => getenv("LDAP_URL"),
# ldap credentials
'bind' => getenv("LDAP_BIND_DN"),
'password' => getenv("LDAP_BIND_PASSWORD"),
# ldap search
'base' => getenv("LDAP_BASE_DN"),
'filter' => getenv("LDAP_FILTER"),
'uid' => getenv("LDAP_UID"),
);
$this->matchers = array(
'username' => getenv("LDAP_USERNAME_MATCHER"),
'email' => getenv("LDAP_EMAIL_MATCHER"),
'first_name' => getenv("LDAP_FIRST_NAME_MATCHER"),
'last_name' => getenv("LDAP_LAST_NAME_MATCHER"),
);
$this->bound = NULL;
$this->conn = NULL;
}
private function connect(): int {
if (($this->conn = @ldap_connect($this->env['url'])) == FALSE) {
$this->conn = NULL;
return 1;
}
@ldap_set_option($this->conn, LDAP_OPT_PROTOCOL_VERSION, 3);
return 0;
}
private function rebind(): int {
if ($this->bound != $this->env['bind']) {
return $this->bind(
$this->env['bind'],
$this->env['password']);
}
return 0;
}
public function bind(
string $dn,
#[\SensitiveParameter] string $password
): int {
if ($this->conn == NULL && $this->connect()) {
return 1;
}
if (@ldap_bind($this->conn, $dn, $password) == FALSE) {
return 1;
}
$this->bound = $dn;
return 0;
}
/**
* @param array<int,mixed> $user
*/
private function find_entry(array $user, string $field): mixed {
if (!isset($user[$field]))
return NULL;
$data = $user[$field];
if (is_array($data))
$data = $data[0];
return $data;
}
public function search(
string ...$usernames
): ?array {
if ($this->rebind())
return NULL;
$search = @ldap_search(
$this->conn,
$this->env['base'],
$this->env['filter']
);
if ($search == FALSE)
return NULL;
$info = @ldap_get_entries($this->conn, $search);
$users = array();
for ($i=0; $i<$info['count']; $i++) {
$user_arr = $info[$i];
$user_data = array (
'dn' => $user_arr['dn'],
'username' => $this->find_entry($user_arr, $this->matchers['username']),
'email' => $this->find_entry($user_arr, $this->matchers['email']),
'first_name' => $this->find_entry($user_arr, $this->matchers['first_name']),
'last_name' => $this->find_entry($user_arr, $this->matchers['last_name'])
);
$user = new User();
if ($user->from_array($user_data)) {
continue;
}
if (count($usernames) && !in_array($user->username, $usernames)) {
continue;
}
$users[] = $user;
}
return $users;
}
}
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