local new_sasl = require "util.sasl".new;
local log = require "util.logger".init("auth_ldap");
local ldap_server = module:get_option_string("ldap_server", "localhost");
local ldap_rootdn = module:get_option_string("ldap_rootdn", "");
local ldap_password = module:get_option_string("ldap_password", "");
local ldap_tls = module:get_option_boolean("ldap_tls");
local ldap_scope = module:get_option_string("ldap_scope", "onelevel");
local ldap_filter = module:get_option_string("ldap_filter", "(uid=%s)");
local ldap_base = assert(module:get_option_string("ldap_base"), "ldap_base is a required option for ldap");
local lualdap = require "lualdap";
local ld = assert(lualdap.open_simple(ldap_server, ldap_rootdn, ldap_password, ldap_tls));
module.unload = function() ld:close(); end
local function ldap_filter_escape(s) return (s:gsub("[\\*\\(\\)\\\\%z]", function(c) return ("\\%02x"):format(c:byte()) end)); end
local function get_user(username)
module:log("debug", "get_user(%q)", username);
return ld:search({
base = ldap_base;
scope = ldap_scope;
filter = ldap_filter:format(ldap_filter_escape(username));
})();
end
local provider = {};
function provider.get_password(username)
local dn, attr = get_user(username);
if dn and attr then
return attr.userPassword;
end
end
function provider.test_password(username, password)
return provider.get_password(username) == password;
end
function provider.user_exists(username)
return not not get_user(username);
end
function provider.set_password(username, password)
local dn, attr = get_user(username);
if not dn then return nil, attr end
if attr.userPassword == password then return true end
return ld:modify(dn, { '=', userPassword = password })();
end
function provider.create_user(username, password) return nil, "Account creation not available with LDAP."; end
function provider.get_sasl_handler()
return new_sasl(module.host, {
plain = function(sasl, username)
local password = provider.get_password(username);
if not password then return "", nil; end
return password, true;
end
});
end
module:provides("auth", provider);