commit: badd888ccbeed88228c0de66c068812a49139ce3 parent: 28bcde5d982ee0cd7bfac68585311661f19de2c4 Author: rinpatch <rinpatch@sdf.org> Date: Thu, 16 Apr 2020 21:58:57 +0000 Merge branch 'authenticated-api-oauth-check-enforcement' into 'develop' Enforcement of OAuth scopes check for authenticated API endpoints See merge request pleroma/pleroma!2349Diffstat:
17 files changed, 248 insertions(+), 40 deletions(-)
diff --git a/lib/pleroma/plugs/auth_expected_plug.ex b/lib/pleroma/plugs/auth_expected_plug.ex @@ -0,0 +1,17 @@ +# Pleroma: A lightweight social networking server +# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/> +# SPDX-License-Identifier: AGPL-3.0-only + +defmodule Pleroma.Plugs.AuthExpectedPlug do + import Plug.Conn + + def init(options), do: options + + def call(conn, _) do + put_private(conn, :auth_expected, true) + end + + def auth_expected?(conn) do + conn.private[:auth_expected] + end +end diff --git a/lib/pleroma/plugs/oauth_scopes_plug.ex b/lib/pleroma/plugs/oauth_scopes_plug.ex @@ -8,12 +8,15 @@ defmodule Pleroma.Plugs.OAuthScopesPlug do alias Pleroma.Config alias Pleroma.Plugs.EnsurePublicOrAuthenticatedPlug + alias Pleroma.Plugs.PlugHelper + + use Pleroma.Web, :plug @behaviour Plug def init(%{scopes: _} = options), do: options - def call(%Plug.Conn{assigns: assigns} = conn, %{scopes: scopes} = options) do + def perform(%Plug.Conn{assigns: assigns} = conn, %{scopes: scopes} = options) do op = options[:op] || :| token = assigns[:token] diff --git a/lib/pleroma/plugs/plug_helper.ex b/lib/pleroma/plugs/plug_helper.ex @@ -0,0 +1,38 @@ +# Pleroma: A lightweight social networking server +# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/> +# SPDX-License-Identifier: AGPL-3.0-only + +defmodule Pleroma.Plugs.PlugHelper do + @moduledoc "Pleroma Plug helper" + + def append_to_called_plugs(conn, plug_module) do + append_to_private_list(conn, :called_plugs, plug_module) + end + + def append_to_skipped_plugs(conn, plug_module) do + append_to_private_list(conn, :skipped_plugs, plug_module) + end + + def plug_called?(conn, plug_module) do + contained_in_private_list?(conn, :called_plugs, plug_module) + end + + def plug_skipped?(conn, plug_module) do + contained_in_private_list?(conn, :skipped_plugs, plug_module) + end + + def plug_called_or_skipped?(conn, plug_module) do + plug_called?(conn, plug_module) || plug_skipped?(conn, plug_module) + end + + defp append_to_private_list(conn, private_variable, value) do + list = conn.private[private_variable] || [] + modified_list = Enum.uniq(list ++ [value]) + Plug.Conn.put_private(conn, private_variable, modified_list) + end + + defp contained_in_private_list?(conn, private_variable, value) do + list = conn.private[private_variable] || [] + value in list + end +end diff --git a/lib/pleroma/tests/oauth_test_controller.ex b/lib/pleroma/tests/oauth_test_controller.ex @@ -0,0 +1,31 @@ +# Pleroma: A lightweight social networking server +# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/> +# SPDX-License-Identifier: AGPL-3.0-only + +# A test controller reachable only in :test env. +# Serves to test OAuth scopes check skipping / enforcement. +defmodule Pleroma.Tests.OAuthTestController do + @moduledoc false + + use Pleroma.Web, :controller + + alias Pleroma.Plugs.OAuthScopesPlug + + plug(:skip_plug, OAuthScopesPlug when action == :skipped_oauth) + + plug(OAuthScopesPlug, %{scopes: ["read"]} when action != :missed_oauth) + + def skipped_oauth(conn, _params) do + noop(conn) + end + + def performed_oauth(conn, _params) do + noop(conn) + end + + def missed_oauth(conn, _params) do + noop(conn) + end + + defp noop(conn), do: json(conn, %{}) +end diff --git a/lib/pleroma/web/masto_fe_controller.ex b/lib/pleroma/web/masto_fe_controller.ex @@ -17,7 +17,7 @@ defmodule Pleroma.Web.MastoFEController do when action == :index ) - plug(Pleroma.Plugs.EnsurePublicOrAuthenticatedPlug when action != :index) + plug(Pleroma.Plugs.EnsurePublicOrAuthenticatedPlug when action not in [:index, :manifest]) @doc "GET /web/*path" def index(%{assigns: %{user: user, token: token}} = conn, _params) diff --git a/lib/pleroma/web/mastodon_api/controllers/account_controller.ex b/lib/pleroma/web/mastodon_api/controllers/account_controller.ex @@ -21,10 +21,13 @@ defmodule Pleroma.Web.MastodonAPI.AccountController do alias Pleroma.Web.CommonAPI alias Pleroma.Web.MastodonAPI.ListView alias Pleroma.Web.MastodonAPI.MastodonAPI + alias Pleroma.Web.MastodonAPI.MastodonAPIController alias Pleroma.Web.MastodonAPI.StatusView alias Pleroma.Web.OAuth.Token alias Pleroma.Web.TwitterAPI.TwitterAPI + plug(:skip_plug, OAuthScopesPlug when action == :identity_proofs) + plug( OAuthScopesPlug, %{fallback: :proceed_unauthenticated, scopes: ["read:accounts"]} @@ -376,6 +379,8 @@ defmodule Pleroma.Web.MastodonAPI.AccountController do end @doc "GET /api/v1/endorsements" - def endorsements(conn, params), - do: Pleroma.Web.MastodonAPI.MastodonAPIController.empty_array(conn, params) + def endorsements(conn, params), do: MastodonAPIController.empty_array(conn, params) + + @doc "GET /api/v1/identity_proofs" + def identity_proofs(conn, params), do: MastodonAPIController.empty_array(conn, params) end diff --git a/lib/pleroma/web/mastodon_api/controllers/mastodon_api_controller.ex b/lib/pleroma/web/mastodon_api/controllers/mastodon_api_controller.ex @@ -3,21 +3,31 @@ # SPDX-License-Identifier: AGPL-3.0-only defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do + @moduledoc """ + Contains stubs for unimplemented Mastodon API endpoints. + + Note: instead of routing directly to this controller's action, + it's preferable to define an action in relevant (non-generic) controller, + set up OAuth rules for it and call this controller's function from it. + """ + use Pleroma.Web, :controller require Logger + plug(:skip_plug, Pleroma.Plugs.OAuthScopesPlug when action in [:empty_array, :empty_object]) + + plug(Pleroma.Plugs.EnsurePublicOrAuthenticatedPlug) + action_fallback(Pleroma.Web.MastodonAPI.FallbackController) - # Stubs for unimplemented mastodon api - # def empty_array(conn, _) do - Logger.debug("Unimplemented, returning an empty array") + Logger.debug("Unimplemented, returning an empty array (list)") json(conn, []) end def empty_object(conn, _) do - Logger.debug("Unimplemented, returning an empty object") + Logger.debug("Unimplemented, returning an empty object (map)") json(conn, %{}) end end diff --git a/lib/pleroma/web/mastodon_api/controllers/suggestion_controller.ex b/lib/pleroma/web/mastodon_api/controllers/suggestion_controller.ex @@ -5,10 +5,13 @@ defmodule Pleroma.Web.MastodonAPI.SuggestionController do use Pleroma.Web, :controller + alias Pleroma.Plugs.OAuthScopesPlug + require Logger + plug(OAuthScopesPlug, %{scopes: ["read"]} when action == :index) + @doc "GET /api/v1/suggestions" - def index(conn, _) do - json(conn, []) - end + def index(conn, params), + do: Pleroma.Web.MastodonAPI.MastodonAPIController.empty_array(conn, params) end diff --git a/lib/pleroma/web/oauth/oauth_controller.ex b/lib/pleroma/web/oauth/oauth_controller.ex @@ -27,6 +27,8 @@ defmodule Pleroma.Web.OAuth.OAuthController do plug(:fetch_flash) plug(RateLimiter, [name: :authentication] when action == :create_authorization) + plug(:skip_plug, Pleroma.Plugs.OAuthScopesPlug) + action_fallback(Pleroma.Web.OAuth.FallbackController) @oob_token_redirect_uri "urn:ietf:wg:oauth:2.0:oob" diff --git a/lib/pleroma/web/pleroma_api/controllers/pleroma_api_controller.ex b/lib/pleroma/web/pleroma_api/controllers/pleroma_api_controller.ex @@ -34,7 +34,7 @@ defmodule Pleroma.Web.PleromaAPI.PleromaAPIController do plug( OAuthScopesPlug, - %{scopes: ["write:conversations"]} when action == :update_conversation + %{scopes: ["write:conversations"]} when action in [:update_conversation, :read_conversations] ) plug(OAuthScopesPlug, %{scopes: ["write:notifications"]} when action == :read_notification) diff --git a/lib/pleroma/web/router.ex b/lib/pleroma/web/router.ex @@ -35,6 +35,7 @@ defmodule Pleroma.Web.Router do pipeline :authenticated_api do plug(:accepts, ["json"]) plug(:fetch_session) + plug(Pleroma.Plugs.AuthExpectedPlug) plug(Pleroma.Plugs.OAuthPlug) plug(Pleroma.Plugs.BasicAuthDecoderPlug) plug(Pleroma.Plugs.UserFetcherPlug) @@ -338,7 +339,7 @@ defmodule Pleroma.Web.Router do get("/accounts/relationships", AccountController, :relationships) get("/accounts/:id/lists", AccountController, :lists) - get("/accounts/:id/identity_proofs", MastodonAPIController, :empty_array) + get("/accounts/:id/identity_proofs", AccountController, :identity_proofs) get("/follow_requests", FollowRequestController, :index) get("/blocks", AccountController, :blocks) @@ -671,6 +672,17 @@ defmodule Pleroma.Web.Router do end end + # Test-only routes needed to test action dispatching and plug chain execution + if Pleroma.Config.get(:env) == :test do + scope "/test/authenticated_api", Pleroma.Tests do + pipe_through(:authenticated_api) + + for action <- [:skipped_oauth, :performed_oauth, :missed_oauth] do + get("/#{action}", OAuthTestController, action) + end + end + end + scope "/", Pleroma.Web.MongooseIM do get("/user_exists", MongooseIMController, :user_exists) get("/check_password", MongooseIMController, :check_password) diff --git a/lib/pleroma/web/twitter_api/twitter_api_controller.ex b/lib/pleroma/web/twitter_api/twitter_api_controller.ex @@ -15,6 +15,8 @@ defmodule Pleroma.Web.TwitterAPI.Controller do plug(OAuthScopesPlug, %{scopes: ["write:notifications"]} when action == :notifications_read) + plug(:skip_plug, OAuthScopesPlug when action in [:oauth_tokens, :revoke_token]) + plug(Pleroma.Plugs.EnsurePublicOrAuthenticatedPlug) action_fallback(:errors) diff --git a/lib/pleroma/web/web.ex b/lib/pleroma/web/web.ex @@ -29,11 +29,40 @@ defmodule Pleroma.Web do import Pleroma.Web.Router.Helpers import Pleroma.Web.TranslationHelpers + alias Pleroma.Plugs.PlugHelper + plug(:set_put_layout) defp set_put_layout(conn, _) do put_layout(conn, Pleroma.Config.get(:app_layout, "app.html")) end + + # Marks a plug intentionally skipped and blocks its execution if it's present in plugs chain + defp skip_plug(conn, plug_module) do + try do + plug_module.ensure_skippable() + rescue + UndefinedFunctionError -> + raise "#{plug_module} is not skippable. Append `use Pleroma.Web, :plug` to its code." + end + + PlugHelper.append_to_skipped_plugs(conn, plug_module) + end + + # Here we can apply before-action hooks (e.g. verify whether auth checks were preformed) + defp action(conn, params) do + if Pleroma.Plugs.AuthExpectedPlug.auth_expected?(conn) && + not PlugHelper.plug_called_or_skipped?(conn, Pleroma.Plugs.OAuthScopesPlug) do + conn + |> render_error( + :forbidden, + "Security violation: OAuth scopes check was neither handled nor explicitly skipped." + ) + |> halt() + else + super(conn, params) + end + end end end @@ -96,6 +125,26 @@ defmodule Pleroma.Web do end end + def plug do + quote do + alias Pleroma.Plugs.PlugHelper + + def ensure_skippable, do: :noop + + @impl Plug + @doc "If marked as skipped, returns `conn`, and calls `perform/2` otherwise." + def call(%Plug.Conn{} = conn, options) do + if PlugHelper.plug_skipped?(conn, __MODULE__) do + conn + else + conn + |> PlugHelper.append_to_called_plugs(__MODULE__) + |> perform(options) + end + end + end + end + @doc """ When used, dispatch to the appropriate controller/view/etc. """ diff --git a/test/plugs/oauth_scopes_plug_test.exs b/test/plugs/oauth_scopes_plug_test.exs @@ -7,6 +7,7 @@ defmodule Pleroma.Plugs.OAuthScopesPlugTest do alias Pleroma.Plugs.EnsurePublicOrAuthenticatedPlug alias Pleroma.Plugs.OAuthScopesPlug + alias Pleroma.Plugs.PlugHelper alias Pleroma.Repo import Mock @@ -16,6 +17,18 @@ defmodule Pleroma.Plugs.OAuthScopesPlugTest do :ok end + test "is not performed if marked as skipped", %{conn: conn} do + with_mock OAuthScopesPlug, [:passthrough], perform: &passthrough([&1, &2]) do + conn = + conn + |> PlugHelper.append_to_skipped_plugs(OAuthScopesPlug) + |> OAuthScopesPlug.call(%{scopes: ["random_scope"]}) + + refute called(OAuthScopesPlug.perform(:_, :_)) + refute conn.halted + end + end + test "if `token.scopes` fulfills specified 'any of' conditions, " <> "proceeds with no op", %{conn: conn} do diff --git a/test/web/auth/oauth_test_controller_test.exs b/test/web/auth/oauth_test_controller_test.exs @@ -0,0 +1,49 @@ +# Pleroma: A lightweight social networking server +# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/> +# SPDX-License-Identifier: AGPL-3.0-only + +defmodule Pleroma.Tests.OAuthTestControllerTest do + use Pleroma.Web.ConnCase + + import Pleroma.Factory + + setup %{conn: conn} do + user = insert(:user) + conn = assign(conn, :user, user) + %{conn: conn, user: user} + end + + test "missed_oauth", %{conn: conn} do + res = + conn + |> get("/test/authenticated_api/missed_oauth") + |> json_response(403) + + assert res == + %{ + "error" => + "Security violation: OAuth scopes check was neither handled nor explicitly skipped." + } + end + + test "skipped_oauth", %{conn: conn} do + conn + |> assign(:token, nil) + |> get("/test/authenticated_api/skipped_oauth") + |> json_response(200) + end + + test "performed_oauth", %{user: user} do + %{conn: good_token_conn} = oauth_access(["read"], user: user) + + good_token_conn + |> get("/test/authenticated_api/performed_oauth") + |> json_response(200) + + %{conn: bad_token_conn} = oauth_access(["follow"], user: user) + + bad_token_conn + |> get("/test/authenticated_api/performed_oauth") + |> json_response(403) + end +end diff --git a/test/web/mastodon_api/controllers/suggestion_controller_test.exs b/test/web/mastodon_api/controllers/suggestion_controller_test.exs @@ -7,34 +7,8 @@ defmodule Pleroma.Web.MastodonAPI.SuggestionControllerTest do alias Pleroma.Config - import Pleroma.Factory - import Tesla.Mock - setup do: oauth_access(["read"]) - setup %{user: user} do - other_user = insert(:user) - host = Config.get([Pleroma.Web.Endpoint, :url, :host]) - url500 = "http://test500?#{host}&#{user.nickname}" - url200 = "http://test200?#{host}&#{user.nickname}" - - mock(fn - %{method: :get, url: ^url500} -> - %Tesla.Env{status: 500, body: "bad request"} - - %{method: :get, url: ^url200} -> - %Tesla.Env{ - status: 200, - body: - ~s([{"acct":"yj455","avatar":"https://social.heldscal.la/avatar/201.jpeg","avatar_static":"https://social.heldscal.la/avatar/s/201.jpeg"}, {"acct":"#{ - other_user.ap_id - }","avatar":"https://social.heldscal.la/avatar/202.jpeg","avatar_static":"https://social.heldscal.la/avatar/s/202.jpeg"}]) - } - end) - - [other_user: other_user] - end - test "returns empty result", %{conn: conn} do res = conn diff --git a/test/web/pleroma_api/controllers/pleroma_api_controller_test.exs b/test/web/pleroma_api/controllers/pleroma_api_controller_test.exs @@ -220,7 +220,7 @@ defmodule Pleroma.Web.PleromaAPI.PleromaAPIControllerTest do test "POST /api/v1/pleroma/conversations/read" do user = insert(:user) - %{user: other_user, conn: conn} = oauth_access(["write:notifications"]) + %{user: other_user, conn: conn} = oauth_access(["write:conversations"]) {:ok, _activity} = CommonAPI.post(user, %{"status" => "Hi @#{other_user.nickname}", "visibility" => "direct"})