1 # Pleroma: A lightweight social networking server
2 # Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
3 # SPDX-License-Identifier: AGPL-3.0-only
5 defmodule Pleroma.Web.Plugs.OAuthPlug do
6 @moduledoc "Performs OAuth authentication by token from params / headers / cookies."
13 alias Pleroma.Web.OAuth.App
14 alias Pleroma.Web.OAuth.Token
16 @realm_reg Regex.compile!("Bearer\:?\s+(.*)$", "i")
18 def init(options), do: options
20 def call(%{assigns: %{user: %User{}}} = conn, _), do: conn
23 with {:ok, token_str} <- fetch_token_str(conn) do
24 with {:ok, user, user_token} <- fetch_user_and_token(token_str),
25 false <- Token.is_expired?(user_token) do
27 |> assign(:token, user_token)
28 |> assign(:user, user)
31 with {:ok, app, app_token} <- fetch_app_and_token(token_str),
32 false <- Token.is_expired?(app_token) do
34 |> assign(:token, app_token)
47 @spec fetch_user_and_token(String.t()) :: {:ok, User.t(), Token.t()} | nil
48 defp fetch_user_and_token(token) do
51 where: t.token == ^token,
52 join: user in assoc(t, :user),
56 with %Token{user: user} = token_record <- Repo.one(query) do
57 {:ok, user, token_record}
61 @spec fetch_app_and_token(String.t()) :: {:ok, App.t(), Token.t()} | nil
62 defp fetch_app_and_token(token) do
64 from(t in Token, where: t.token == ^token, join: app in assoc(t, :app), preload: [app: app])
66 with %Token{app: app} = token_record <- Repo.one(query) do
67 {:ok, app, token_record}
71 # Gets token string from conn (in params / headers / session)
73 @spec fetch_token_str(Plug.Conn.t() | list(String.t())) :: :no_token_found | {:ok, String.t()}
74 defp fetch_token_str(%Plug.Conn{params: %{"access_token" => access_token}} = _conn) do
78 defp fetch_token_str(%Plug.Conn{} = conn) do
79 headers = get_req_header(conn, "authorization")
81 with {:ok, token} <- fetch_token_str(headers) do
84 _ -> fetch_token_from_session(conn)
88 defp fetch_token_str([token | tail]) do
89 trimmed_token = String.trim(token)
91 case Regex.run(@realm_reg, trimmed_token) do
92 [_, match] -> {:ok, String.trim(match)}
93 _ -> fetch_token_str(tail)
97 defp fetch_token_str([]), do: :no_token_found
99 @spec fetch_token_from_session(Plug.Conn.t()) :: :no_token_found | {:ok, String.t()}
100 defp fetch_token_from_session(conn) do
101 case get_session(conn, :oauth_token) do
102 nil -> :no_token_found
103 token -> {:ok, token}