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diff --git a/lib/pleroma/ldap.ex b/lib/pleroma/ldap.ex
index 11544f0d9..ac819613e 100644
--- a/lib/pleroma/ldap.ex
+++ b/lib/pleroma/ldap.ex
@@ -1,233 +1,236 @@
defmodule Pleroma.LDAP do
use GenServer
require Logger
alias Pleroma.Config
alias Pleroma.User
import Pleroma.Web.Auth.Helpers, only: [fetch_user: 1]
@connection_timeout 10_000
@search_timeout 10_000
def start_link(_) do
GenServer.start_link(__MODULE__, [], name: __MODULE__)
end
@impl true
def init(state) do
case {Config.get(Pleroma.Web.Auth.Authenticator), Config.get([:ldap, :enabled])} do
{Pleroma.Web.Auth.LDAPAuthenticator, true} ->
{:ok, state, {:continue, :connect}}
{Pleroma.Web.Auth.LDAPAuthenticator, false} ->
Logger.error(
"LDAP Authenticator enabled but :pleroma, :ldap is not enabled. Auth will not work."
)
{:ok, state}
{_, true} ->
Logger.warning(
":pleroma, :ldap is enabled but Pleroma.Web.Authenticator is not set to the LDAPAuthenticator. LDAP will not be used."
)
{:ok, state}
+
+ _ ->
+ {:ok, state}
end
end
@impl true
def handle_continue(:connect, _state), do: do_handle_connect()
@impl true
def handle_info(:connect, _state), do: do_handle_connect()
def handle_info({:bind_after_reconnect, name, password, from}, state) do
result = bind_user(state[:connection], name, password)
GenServer.reply(from, result)
{:noreply, state}
end
defp do_handle_connect do
state =
case connect() do
{:ok, connection} ->
:eldap.controlling_process(connection, self())
[connection: connection]
_ ->
Logger.error("Failed to connect to LDAP. Retrying in 5000ms")
Process.send_after(self(), :connect, 5_000)
[]
end
{:noreply, state}
end
@impl true
def handle_call({:bind_user, name, password}, from, state) do
case bind_user(state[:connection], name, password) do
:needs_reconnect ->
Process.send(self(), {:bind_after_reconnect, name, password, from}, [])
{:noreply, state, {:continue, :connect}}
result ->
{:reply, result, state, :hibernate}
end
end
@impl true
def terminate(_, state) do
:eldap.close(state[:connection])
:ok
end
defp connect do
ldap = Config.get(:ldap, [])
host = Keyword.get(ldap, :host, "localhost")
port = Keyword.get(ldap, :port, 389)
ssl = Keyword.get(ldap, :ssl, false)
tls = Keyword.get(ldap, :tls, false)
cacertfile = Keyword.get(ldap, :cacertfile) || CAStore.file_path()
default_secure_opts = [
verify: :verify_peer,
cacerts: decode_certfile(cacertfile),
customize_hostname_check: [
fqdn_fun: fn _ -> to_charlist(host) end
]
]
sslopts = Keyword.merge(default_secure_opts, Keyword.get(ldap, :sslopts, []))
tlsopts = Keyword.merge(default_secure_opts, Keyword.get(ldap, :tlsopts, []))
default_options = [{:port, port}, {:ssl, ssl}, {:timeout, @connection_timeout}]
# :sslopts can only be included in :eldap.open/2 when {ssl: true}
# or the connection will fail
options =
if ssl do
default_options ++ [{:sslopts, sslopts}]
else
default_options
end
case :eldap.open([to_charlist(host)], options) do
{:ok, connection} ->
try do
cond do
ssl ->
:application.ensure_all_started(:ssl)
{:ok, connection}
tls ->
case :eldap.start_tls(
connection,
tlsopts,
@connection_timeout
) do
:ok ->
{:ok, connection}
error ->
Logger.error("Could not start TLS: #{inspect(error)}")
:eldap.close(connection)
end
true ->
{:ok, :connection}
end
after
:ok
end
{:error, error} ->
Logger.error("Could not open LDAP connection: #{inspect(error)}")
{:error, {:ldap_connection_error, error}}
end
end
defp bind_user(connection, name, password) do
uid = Config.get([:ldap, :uid], "cn")
base = Config.get([:ldap, :base])
case :eldap.simple_bind(connection, "#{uid}=#{name},#{base}", password) do
:ok ->
case fetch_user(name) do
%User{} = user ->
user
_ ->
register_user(connection, base, uid, name)
end
# eldap does not inform us of socket closure
# until it is used
{:error, {:gen_tcp_error, :closed}} ->
:eldap.close(connection)
:needs_reconnect
error ->
Logger.error("Could not bind LDAP user #{name}: #{inspect(error)}")
{:error, {:ldap_bind_error, error}}
end
end
defp register_user(connection, base, uid, name) do
case :eldap.search(connection, [
{:base, to_charlist(base)},
{:filter, :eldap.equalityMatch(to_charlist(uid), to_charlist(name))},
{:scope, :eldap.wholeSubtree()},
{:timeout, @search_timeout}
]) do
# The :eldap_search_result record structure changed in OTP 24.3 and added a controls field
# https://github.com/erlang/otp/pull/5538
{:ok, {:eldap_search_result, [{:eldap_entry, _object, attributes}], _referrals}} ->
try_register(name, attributes)
{:ok, {:eldap_search_result, [{:eldap_entry, _object, attributes}], _referrals, _controls}} ->
try_register(name, attributes)
error ->
Logger.error("Couldn't register user because LDAP search failed: #{inspect(error)}")
{:error, {:ldap_search_error, error}}
end
end
defp try_register(name, attributes) do
params = %{
name: name,
nickname: name,
password: nil
}
params =
case List.keyfind(attributes, ~c"mail", 0) do
{_, [mail]} -> Map.put_new(params, :email, :erlang.list_to_binary(mail))
_ -> params
end
changeset = User.register_changeset_ldap(%User{}, params)
case User.register(changeset) do
{:ok, user} -> user
error -> error
end
end
defp decode_certfile(file) do
with {:ok, data} <- File.read(file) do
data
|> :public_key.pem_decode()
|> Enum.map(fn {_, b, _} -> b end)
else
_ ->
Logger.error("Unable to read certfile: #{file}")
[]
end
end
end

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