From c0a01e73cfc655b1cc2f8866da970a017b066af6 Mon Sep 17 00:00:00 2001 From: tusooa Date: Thu, 30 Mar 2023 21:01:37 -0400 Subject: [PATCH] Enforce unauth restrictions for public streaming endpoints --- lib/pleroma/web/streamer.ex | 46 +++++++++++++++--- test/pleroma/web/streamer_test.exs | 77 ++++++++++++++++++++++++++++++ 2 files changed, 116 insertions(+), 7 deletions(-) diff --git a/lib/pleroma/web/streamer.ex b/lib/pleroma/web/streamer.ex index f009fbd9e..1c3848bfb 100644 --- a/lib/pleroma/web/streamer.ex +++ b/lib/pleroma/web/streamer.ex @@ -25,6 +25,7 @@ defmodule Pleroma.Web.Streamer do def registry, do: @registry @public_streams ["public", "public:local", "public:media", "public:local:media"] + @local_streams ["public:local", "public:local:media"] @user_streams ["user", "user:notification", "direct"] @doc "Expands and authorizes a stream, and registers the process for streaming." @@ -41,14 +42,37 @@ def get_topic_and_add_socket(stream, user, oauth_token, params \\ %{}) do end end + defp can_access_stream(user, oauth_token, kind) do + with {_, true} <- {:restrict?, Config.restrict_unauthenticated_access?(:timelines, kind)}, + {_, %User{id: user_id}, %Token{user_id: user_id}} <- {:user, user, oauth_token}, + {_, true} <- + {:scopes, + OAuthScopesPlug.filter_descendants(["read:statuses"], oauth_token.scopes) != []} do + true + else + {:restrict?, _} -> + true + + _ -> + false + end + end + @doc "Expand and authorizes a stream" @spec get_topic(stream :: String.t(), User.t() | nil, Token.t() | nil, Map.t()) :: {:ok, topic :: String.t()} | {:error, :bad_topic} def get_topic(stream, user, oauth_token, params \\ %{}) - # Allow all public steams. - def get_topic(stream, _user, _oauth_token, _params) when stream in @public_streams do - {:ok, stream} + # Allow all public steams if the instance allows unauthenticated access. + # Otherwise, only allow users with valid oauth tokens. + def get_topic(stream, user, oauth_token, _params) when stream in @public_streams do + kind = if stream in @local_streams, do: :local, else: :federated + + if can_access_stream(user, oauth_token, kind) do + {:ok, stream} + else + {:error, :unauthorized} + end end # Allow all hashtags streams. @@ -57,12 +81,20 @@ def get_topic("hashtag", _user, _oauth_token, %{"tag" => tag} = _params) do end # Allow remote instance streams. - def get_topic("public:remote", _user, _oauth_token, %{"instance" => instance} = _params) do - {:ok, "public:remote:" <> instance} + def get_topic("public:remote", user, oauth_token, %{"instance" => instance} = _params) do + if can_access_stream(user, oauth_token, :federated) do + {:ok, "public:remote:" <> instance} + else + {:error, :unauthorized} + end end - def get_topic("public:remote:media", _user, _oauth_token, %{"instance" => instance} = _params) do - {:ok, "public:remote:media:" <> instance} + def get_topic("public:remote:media", user, oauth_token, %{"instance" => instance} = _params) do + if can_access_stream(user, oauth_token, :federated) do + {:ok, "public:remote:media:" <> instance} + else + {:error, :unauthorized} + end end # Expand user streams. diff --git a/test/pleroma/web/streamer_test.exs b/test/pleroma/web/streamer_test.exs index b07c16faa..5bd04fe9f 100644 --- a/test/pleroma/web/streamer_test.exs +++ b/test/pleroma/web/streamer_test.exs @@ -25,6 +25,26 @@ test "allows public" do assert {:ok, "public:local:media"} = Streamer.get_topic("public:local:media", nil, nil) end + test "rejects local public streams if restricted_unauthenticated is on" do + clear_config([:restrict_unauthenticated, :timelines, :local], true) + + assert {:error, :unauthorized} = Streamer.get_topic("public:local", nil, nil) + assert {:error, :unauthorized} = Streamer.get_topic("public:local:media", nil, nil) + end + + test "rejects remote public streams if restricted_unauthenticated is on" do + clear_config([:restrict_unauthenticated, :timelines, :federated], true) + + assert {:error, :unauthorized} = Streamer.get_topic("public", nil, nil) + assert {:error, :unauthorized} = Streamer.get_topic("public:media", nil, nil) + + assert {:error, :unauthorized} = + Streamer.get_topic("public:remote", nil, nil, %{"instance" => "lain.com"}) + + assert {:error, :unauthorized} = + Streamer.get_topic("public:remote:media", nil, nil, %{"instance" => "lain.com"}) + end + test "allows instance streams" do assert {:ok, "public:remote:lain.com"} = Streamer.get_topic("public:remote", nil, nil, %{"instance" => "lain.com"}) @@ -65,6 +85,63 @@ test "allows public streams (regardless of OAuth token scopes)", %{ end end + test "allows local public streams if restricted_unauthenticated is on", %{ + user: user, + token: oauth_token + } do + clear_config([:restrict_unauthenticated, :timelines, :local], true) + + %{token: read_notifications_token} = oauth_access(["read:notifications"], user: user) + %{token: badly_scoped_token} = oauth_access(["irrelevant:scope"], user: user) + + assert {:ok, "public:local"} = Streamer.get_topic("public:local", user, oauth_token) + + assert {:ok, "public:local:media"} = + Streamer.get_topic("public:local:media", user, oauth_token) + + for token <- [read_notifications_token, badly_scoped_token] do + assert {:error, :unauthorized} = Streamer.get_topic("public:local", user, token) + + assert {:error, :unauthorized} = Streamer.get_topic("public:local:media", user, token) + end + end + + test "allows remote public streams if restricted_unauthenticated is on", %{ + user: user, + token: oauth_token + } do + clear_config([:restrict_unauthenticated, :timelines, :federated], true) + + %{token: read_notifications_token} = oauth_access(["read:notifications"], user: user) + %{token: badly_scoped_token} = oauth_access(["irrelevant:scope"], user: user) + + assert {:ok, "public"} = Streamer.get_topic("public", user, oauth_token) + assert {:ok, "public:media"} = Streamer.get_topic("public:media", user, oauth_token) + + assert {:ok, "public:remote:lain.com"} = + Streamer.get_topic("public:remote", user, oauth_token, %{"instance" => "lain.com"}) + + assert {:ok, "public:remote:media:lain.com"} = + Streamer.get_topic("public:remote:media", user, oauth_token, %{ + "instance" => "lain.com" + }) + + for token <- [read_notifications_token, badly_scoped_token] do + assert {:error, :unauthorized} = Streamer.get_topic("public", user, token) + assert {:error, :unauthorized} = Streamer.get_topic("public:media", user, token) + + assert {:error, :unauthorized} = + Streamer.get_topic("public:remote", user, token, %{ + "instance" => "lain.com" + }) + + assert {:error, :unauthorized} = + Streamer.get_topic("public:remote:media", user, token, %{ + "instance" => "lain.com" + }) + end + end + test "allows user streams (with proper OAuth token scopes)", %{ user: user, token: read_oauth_token