Enforce unauth restrictions for public streaming endpoints

This commit is contained in:
tusooa 2023-03-30 21:01:37 -04:00 committed by Haelwenn (lanodan) Monnier
parent b36263e5ff
commit d0c2e0830b
2 changed files with 116 additions and 7 deletions

View File

@ -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", "user:pleroma_chat"]
@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
# 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
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
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.

View File

@ -29,6 +29,26 @@ 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"})
@ -69,6 +89,63 @@ 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