Commit 8b352af4 authored by kaniini's avatar kaniini
Browse files

Merge branch 'feature/openldap-support' into 'develop'

OpenLDAP support

Closes #203

See merge request !859
parents acf215d9 a070dd4a
Pipeline #9033 passed with stages
in 4 minutes and 25 seconds
......@@ -370,6 +370,17 @@
rel: false
]
config :pleroma, :ldap,
enabled: System.get_env("LDAP_ENABLED") == "true",
host: System.get_env("LDAP_HOST") || "localhost",
port: String.to_integer(System.get_env("LDAP_PORT") || "389"),
ssl: System.get_env("LDAP_SSL") == "true",
sslopts: [],
tls: System.get_env("LDAP_TLS") == "true",
tlsopts: [],
base: System.get_env("LDAP_BASE") || "dc=example,dc=com",
uid: System.get_env("LDAP_UID") || "cn"
# Import environment specific config. This must remain at the bottom
# of this file so it overrides the configuration defined above.
import_config "#{Mix.env()}.exs"
......@@ -331,3 +331,26 @@ config :auto_linker,
rel: false
]
```
## :ldap
Use LDAP for user authentication. When a user logs in to the Pleroma
instance, the name and password will be verified by trying to authenticate
(bind) to an LDAP server. If a user exists in the LDAP directory but there
is no account with the same name yet on the Pleroma instance then a new
Pleroma account will be created with the same name as the LDAP user name.
* `enabled`: enables LDAP authentication
* `host`: LDAP server hostname
* `port`: LDAP port, e.g. 389 or 636
* `ssl`: true to use SSL, usually implies the port 636
* `sslopts`: additional SSL options
* `tls`: true to start TLS, usually implies the port 389
* `tlsopts`: additional TLS options
* `base`: LDAP base, e.g. "dc=example,dc=com"
* `uid`: LDAP attribute name to authenticate the user, e.g. when "cn", the filter will be "cn=username,base"
## Pleroma.Web.Auth.Authenticator
* `Pleroma.Web.Auth.PleromaAuthenticator`: default database authenticator
* `Pleroma.Web.Auth.LDAPAuthenticator`: LDAP authentication
# Pleroma: A lightweight social networking server
# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.Auth.LDAPAuthenticator do
alias Pleroma.User
require Logger
@behaviour Pleroma.Web.Auth.Authenticator
@connection_timeout 10_000
@search_timeout 10_000
def get_user(%Plug.Conn{} = conn) do
if Pleroma.Config.get([:ldap, :enabled]) do
{name, password} =
case conn.params do
%{"authorization" => %{"name" => name, "password" => password}} ->
{name, password}
%{"grant_type" => "password", "username" => name, "password" => password} ->
{name, password}
end
case ldap_user(name, password) do
%User{} = user ->
{:ok, user}
{:error, {:ldap_connection_error, _}} ->
# When LDAP is unavailable, try default authenticator
Pleroma.Web.Auth.PleromaAuthenticator.get_user(conn)
error ->
error
end
else
# Fall back to default authenticator
Pleroma.Web.Auth.PleromaAuthenticator.get_user(conn)
end
end
def handle_error(%Plug.Conn{} = _conn, error) do
error
end
def auth_template, do: nil
defp ldap_user(name, password) do
ldap = Pleroma.Config.get(:ldap, [])
host = Keyword.get(ldap, :host, "localhost")
port = Keyword.get(ldap, :port, 389)
ssl = Keyword.get(ldap, :ssl, false)
sslopts = Keyword.get(ldap, :sslopts, [])
options =
[{:port, port}, {:ssl, ssl}, {:timeout, @connection_timeout}] ++
if sslopts != [], do: [{:sslopts, sslopts}], else: []
case :eldap.open([to_charlist(host)], options) do
{:ok, connection} ->
try do
if Keyword.get(ldap, :tls, false) do
:application.ensure_all_started(:ssl)
case :eldap.start_tls(
connection,
Keyword.get(ldap, :tlsopts, []),
@connection_timeout
) do
:ok ->
:ok
error ->
Logger.error("Could not start TLS: #{inspect(error)}")
end
end
bind_user(connection, ldap, name, password)
after
:eldap.close(connection)
end
{:error, error} ->
Logger.error("Could not open LDAP connection: #{inspect(error)}")
{:error, {:ldap_connection_error, error}}
end
end
defp bind_user(connection, ldap, name, password) do
uid = Keyword.get(ldap, :uid, "cn")
base = Keyword.get(ldap, :base)
case :eldap.simple_bind(connection, "#{uid}=#{name},#{base}", password) do
:ok ->
case User.get_by_nickname_or_email(name) do
%User{} = user ->
user
_ ->
register_user(connection, base, uid, name, password)
end
error ->
error
end
end
defp register_user(connection, base, uid, name, password) do
case :eldap.search(connection, [
{:base, to_charlist(base)},
{:filter, :eldap.equalityMatch(to_charlist(uid), to_charlist(name))},
{:scope, :eldap.wholeSubtree()},
{:attributes, ['mail', 'email']},
{:timeout, @search_timeout}
]) do
{:ok, {:eldap_search_result, [{:eldap_entry, _, attributes}], _}} ->
with {_, [mail]} <- List.keyfind(attributes, 'mail', 0) do
params = %{
email: :erlang.list_to_binary(mail),
name: name,
nickname: name,
password: password,
password_confirmation: password
}
changeset = User.register_changeset(%User{}, params)
case User.register(changeset) do
{:ok, user} -> user
error -> error
end
else
_ ->
Logger.error("Could not find LDAP attribute mail: #{inspect(attributes)}")
{:error, :ldap_registration_missing_attributes}
end
error ->
error
end
end
end
......@@ -9,7 +9,14 @@ defmodule Pleroma.Web.Auth.PleromaAuthenticator do
@behaviour Pleroma.Web.Auth.Authenticator
def get_user(%Plug.Conn{} = conn) do
%{"authorization" => %{"name" => name, "password" => password}} = conn.params
{name, password} =
case conn.params do
%{"authorization" => %{"name" => name, "password" => password}} ->
{name, password}
%{"grant_type" => "password", "username" => name, "password" => password} ->
{name, password}
end
with {_, %User{} = user} <- {:user, User.get_by_nickname_or_email(name)},
{_, true} <- {:checkpw, Pbkdf2.checkpw(password, user.password_hash)} do
......
......@@ -5,7 +5,6 @@
defmodule Pleroma.Web.OAuth.OAuthController do
use Pleroma.Web, :controller
alias Comeonin.Pbkdf2
alias Pleroma.Repo
alias Pleroma.User
alias Pleroma.Web.Auth.Authenticator
......@@ -126,11 +125,10 @@ def token_exchange(conn, %{"grant_type" => "authorization_code"} = params) do
def token_exchange(
conn,
%{"grant_type" => "password", "username" => name, "password" => password} = params
%{"grant_type" => "password"} = params
) do
with %App{} = app <- get_app_from_request(conn, params),
%User{} = user <- User.get_by_nickname_or_email(name),
true <- Pbkdf2.checkpw(password, user.password_hash),
with {_, {:ok, %User{} = user}} <- {:get_user, Authenticator.get_user(conn)},
%App{} = app <- get_app_from_request(conn, params),
{:auth_active, true} <- {:auth_active, User.auth_active?(user)},
scopes <- oauth_scopes(params, app.scopes),
[] <- scopes -- app.scopes,
......
# Pleroma: A lightweight social networking server
# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.OAuth.LDAPAuthorizationTest do
use Pleroma.Web.ConnCase
alias Pleroma.Repo
alias Pleroma.Web.OAuth.Token
import Pleroma.Factory
import ExUnit.CaptureLog
import Mock
setup_all do
ldap_authenticator = Pleroma.Config.get([Pleroma.Web.Auth.Authenticator])
ldap_enabled = Pleroma.Config.get([:ldap, :enabled])
on_exit(fn ->
Pleroma.Config.put([Pleroma.Web.Auth.Authenticator], ldap_authenticator)
Pleroma.Config.put([:ldap, :enabled], ldap_enabled)
end)
Pleroma.Config.put([Pleroma.Web.Auth.Authenticator], Pleroma.Web.Auth.LDAPAuthenticator)
Pleroma.Config.put([:ldap, :enabled], true)
:ok
end
test "authorizes the existing user using LDAP credentials" do
password = "testpassword"
user = insert(:user, password_hash: Comeonin.Pbkdf2.hashpwsalt(password))
app = insert(:oauth_app, scopes: ["read", "write"])
host = Pleroma.Config.get([:ldap, :host]) |> to_charlist
port = Pleroma.Config.get([:ldap, :port])
with_mocks [
{:eldap, [],
[
open: fn [^host], [{:port, ^port}, {:ssl, false} | _] -> {:ok, self()} end,
simple_bind: fn _connection, _dn, ^password -> :ok end,
close: fn _connection ->
send(self(), :close_connection)
:ok
end
]}
] do
conn =
build_conn()
|> post("/oauth/token", %{
"grant_type" => "password",
"username" => user.nickname,
"password" => password,
"client_id" => app.client_id,
"client_secret" => app.client_secret
})
assert %{"access_token" => token} = json_response(conn, 200)
token = Repo.get_by(Token, token: token)
assert token.user_id == user.id
assert_received :close_connection
end
end
test "creates a new user after successful LDAP authorization" do
password = "testpassword"
user = build(:user)
app = insert(:oauth_app, scopes: ["read", "write"])
host = Pleroma.Config.get([:ldap, :host]) |> to_charlist
port = Pleroma.Config.get([:ldap, :port])
with_mocks [
{:eldap, [],
[
open: fn [^host], [{:port, ^port}, {:ssl, false} | _] -> {:ok, self()} end,
simple_bind: fn _connection, _dn, ^password -> :ok end,
equalityMatch: fn _type, _value -> :ok end,
wholeSubtree: fn -> :ok end,
search: fn _connection, _options ->
{:ok,
{:eldap_search_result, [{:eldap_entry, '', [{'mail', [to_charlist(user.email)]}]}],
[]}}
end,
close: fn _connection ->
send(self(), :close_connection)
:ok
end
]}
] do
conn =
build_conn()
|> post("/oauth/token", %{
"grant_type" => "password",
"username" => user.nickname,
"password" => password,
"client_id" => app.client_id,
"client_secret" => app.client_secret
})
assert %{"access_token" => token} = json_response(conn, 200)
token = Repo.get_by(Token, token: token) |> Repo.preload(:user)
assert token.user.nickname == user.nickname
assert_received :close_connection
end
end
test "falls back to the default authorization when LDAP is unavailable" do
password = "testpassword"
user = insert(:user, password_hash: Comeonin.Pbkdf2.hashpwsalt(password))
app = insert(:oauth_app, scopes: ["read", "write"])
host = Pleroma.Config.get([:ldap, :host]) |> to_charlist
port = Pleroma.Config.get([:ldap, :port])
with_mocks [
{:eldap, [],
[
open: fn [^host], [{:port, ^port}, {:ssl, false} | _] -> {:error, 'connect failed'} end,
simple_bind: fn _connection, _dn, ^password -> :ok end,
close: fn _connection ->
send(self(), :close_connection)
:ok
end
]}
] do
log =
capture_log(fn ->
conn =
build_conn()
|> post("/oauth/token", %{
"grant_type" => "password",
"username" => user.nickname,
"password" => password,
"client_id" => app.client_id,
"client_secret" => app.client_secret
})
assert %{"access_token" => token} = json_response(conn, 200)
token = Repo.get_by(Token, token: token)
assert token.user_id == user.id
end)
assert log =~ "Could not open LDAP connection: 'connect failed'"
refute_received :close_connection
end
end
test "disallow authorization for wrong LDAP credentials" do
password = "testpassword"
user = insert(:user, password_hash: Comeonin.Pbkdf2.hashpwsalt(password))
app = insert(:oauth_app, scopes: ["read", "write"])
host = Pleroma.Config.get([:ldap, :host]) |> to_charlist
port = Pleroma.Config.get([:ldap, :port])
with_mocks [
{:eldap, [],
[
open: fn [^host], [{:port, ^port}, {:ssl, false} | _] -> {:ok, self()} end,
simple_bind: fn _connection, _dn, ^password -> {:error, :invalidCredentials} end,
close: fn _connection ->
send(self(), :close_connection)
:ok
end
]}
] do
conn =
build_conn()
|> post("/oauth/token", %{
"grant_type" => "password",
"username" => user.nickname,
"password" => password,
"client_id" => app.client_id,
"client_secret" => app.client_secret
})
assert %{"error" => "Invalid credentials"} = json_response(conn, 400)
assert_received :close_connection
end
end
end
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