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-rw-r--r--config/config.exs11
-rw-r--r--docs/config.md23
-rw-r--r--lib/pleroma/web/auth/ldap_authenticator.ex143
-rw-r--r--lib/pleroma/web/auth/pleroma_authenticator.ex9
-rw-r--r--lib/pleroma/web/oauth/oauth_controller.ex8
-rw-r--r--test/web/oauth/ldap_authorization_test.exs187
6 files changed, 375 insertions, 6 deletions
diff --git a/config/config.exs b/config/config.exs
index 326c4b601..ccdd35777 100644
--- a/config/config.exs
+++ b/config/config.exs
@@ -370,6 +370,17 @@ config :auto_linker,
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"
diff --git a/docs/config.md b/docs/config.md
index e34ffe980..201180373 100644
--- a/docs/config.md
+++ b/docs/config.md
@@ -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
diff --git a/lib/pleroma/web/auth/ldap_authenticator.ex b/lib/pleroma/web/auth/ldap_authenticator.ex
new file mode 100644
index 000000000..88217aab8
--- /dev/null
+++ b/lib/pleroma/web/auth/ldap_authenticator.ex
@@ -0,0 +1,143 @@
+# 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
diff --git a/lib/pleroma/web/auth/pleroma_authenticator.ex b/lib/pleroma/web/auth/pleroma_authenticator.ex
index 333446bef..94a19ad49 100644
--- a/lib/pleroma/web/auth/pleroma_authenticator.ex
+++ b/lib/pleroma/web/auth/pleroma_authenticator.ex
@@ -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
diff --git a/lib/pleroma/web/oauth/oauth_controller.ex b/lib/pleroma/web/oauth/oauth_controller.ex
index ec70b7ccc..d69383d40 100644
--- a/lib/pleroma/web/oauth/oauth_controller.ex
+++ b/lib/pleroma/web/oauth/oauth_controller.ex
@@ -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 @@ defmodule Pleroma.Web.OAuth.OAuthController 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,
diff --git a/test/web/oauth/ldap_authorization_test.exs b/test/web/oauth/ldap_authorization_test.exs
new file mode 100644
index 000000000..570e41f3e
--- /dev/null
+++ b/test/web/oauth/ldap_authorization_test.exs
@@ -0,0 +1,187 @@
+# 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
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 04:45:00 +0000