Merge branch 'auth-improvements' into 'develop'

Cookie auth rework / Auth subsystem refactoring and tweaks

Closes pleroma/secteam/pleroma#3

See merge request pleroma/pleroma!3112

.gitattributes

@@ -1,8 +1,10 @@
 *.ex diff=elixir
 *.exs diff=elixir
-# At the time of writing all js/css files included
-# in the repo are minified bundles, and we don't want
-# to search/diff those as text files.
+
+priv/static/instance/static.css diff=css
+
+# Most of js/css files included in the repo are minified bundles,
+#   and we don't want to search/diff those as text files.
 *.js binary
 *.js.map binary
 *.css binary

CHANGELOG.md

@@ -25,6 +25,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - The site title is now injected as a `title` tag like preloads or metadata.
 - Password reset tokens now are not accepted after a certain age.
 - Mix tasks to help with displaying and removing ConfigDB entries. See `mix pleroma.config`
+- OAuth form improvements: users are remembered by their cookie, the CSS is overridable by the admin, and the style has been improved.
+- OAuth improvements and fixes: more secure session-based authentication (by token that could be revoked anytime), ability to revoke belonging OAuth token from any client etc. 
 
 <details>
   <summary>API Changes</summary>

docs/configuration/static_dir.md

@@ -88,3 +88,8 @@ config :pleroma, :frontend_configurations,
     Note the extra `static` folder for the terms-of-service.html
 
 Terms of Service will be shown to all users on the registration page. It's the best place where to write down the rules for your instance. You can modify the rules by adding and changing `$static_dir/static/terms-of-service.html`.
+
+ 	
+## Styling rendered pages
+
+To overwrite the CSS stylesheet of the OAuth form and other static pages, you can upload your own CSS file to `instance/static/static.css`. This will completely replace the CSS used by those pages, so it might be a good idea to copy the one from `priv/static/instance/static.css` and make your changes.

docs/dev.md

@@ -14,9 +14,9 @@ This document contains notes and guidelines for Pleroma developers.
 
   For `:api` pipeline routes, it'll be verified whether `OAuthScopesPlug` was called or explicitly skipped, and if it was not then auth information will be dropped for request. Then `EnsurePublicOrAuthenticatedPlug` will be called to ensure that either the instance is not private or user is authenticated (unless explicitly skipped). Such automated checks help to prevent human errors and result in higher security / privacy for users.
 
-## [HTTP Basic Authentication](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Authorization)
+## Non-OAuth authentication
 
-* With HTTP Basic Auth, OAuth scopes check is _not_ performed for any action (since password is provided during the auth, requester is able to obtain a token with full permissions anyways). `Pleroma.Web.Plugs.AuthenticationPlug` and `Pleroma.Web.Plugs.LegacyAuthenticationPlug` both call `Pleroma.Web.Plugs.OAuthScopesPlug.skip_plug(conn)` when password is provided.
+* With non-OAuth authentication ([HTTP Basic Authentication](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Authorization) or HTTP header- or params-provided auth), OAuth scopes check is _not_ performed for any action (since password is provided during the auth, requester is able to obtain a token with full permissions anyways); auth plugs invoke `Pleroma.Helpers.AuthHelper.skip_oauth(conn)` in this case.
 
 ## Auth-related configuration, OAuth consumer mode etc.
 

lib/pleroma/helpers/auth_helper.ex

@@ -0,0 +1,46 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Helpers.AuthHelper do
+  alias Pleroma.Web.Plugs.OAuthScopesPlug
+  alias Plug.Conn
+
+  import Plug.Conn
+
+  @oauth_token_session_key :oauth_token
+
+  @doc """
+  Skips OAuth permissions (scopes) checks, assigns nil `:token`.
+  Intended to be used with explicit authentication and only when OAuth token cannot be determined.
+  """
+  def skip_oauth(conn) do
+    conn
+    |> assign(:token, nil)
+    |> OAuthScopesPlug.skip_plug()
+  end
+
+  @doc "Drops authentication info from connection"
+  def drop_auth_info(conn) do
+    # To simplify debugging, setting a private variable on `conn` if auth info is dropped
+    conn
+    |> assign(:user, nil)
+    |> assign(:token, nil)
+    |> put_private(:authentication_ignored, true)
+  end
+
+  @doc "Gets OAuth token string from session"
+  def get_session_token(%Conn{} = conn) do
+    get_session(conn, @oauth_token_session_key)
+  end
+
+  @doc "Updates OAuth token string in session"
+  def put_session_token(%Conn{} = conn, token) when is_binary(token) do
+    put_session(conn, @oauth_token_session_key, token)
+  end
+
+  @doc "Deletes OAuth token string from session"
+  def delete_session_token(%Conn{} = conn) do
+    delete_session(conn, @oauth_token_session_key)
+  end
+end

lib/pleroma/user.ex

@@ -2408,4 +2408,8 @@ def sanitize_html(%User{} = user, filter) do
     |> Map.put(:bio, HTML.filter_tags(user.bio, filter))
     |> Map.put(:fields, fields)
   end
+
+  def get_host(%User{ap_id: ap_id} = _user) do
+    URI.parse(ap_id).host
+  end
 end

lib/pleroma/web.ex

@@ -20,6 +20,7 @@ defmodule Pleroma.Web do
   below.
   """
 
+  alias Pleroma.Helpers.AuthHelper
   alias Pleroma.Web.Plugs.EnsureAuthenticatedPlug
   alias Pleroma.Web.Plugs.EnsurePublicOrAuthenticatedPlug
   alias Pleroma.Web.Plugs.ExpectAuthenticatedCheckPlug
@@ -75,7 +76,7 @@ defp action(conn, params) do
       defp maybe_drop_authentication_if_oauth_check_ignored(conn) do
         if PlugHelper.plug_called?(conn, ExpectPublicOrAuthenticatedCheckPlug) and
              not PlugHelper.plug_called_or_skipped?(conn, OAuthScopesPlug) do
-          OAuthScopesPlug.drop_auth_info(conn)
+          AuthHelper.drop_auth_info(conn)
         else
           conn
         end

lib/pleroma/web/masto_fe_controller.ex

@@ -6,6 +6,8 @@ defmodule Pleroma.Web.MastoFEController do
   use Pleroma.Web, :controller
 
   alias Pleroma.User
+  alias Pleroma.Web.MastodonAPI.AuthController
+  alias Pleroma.Web.OAuth.Token
   alias Pleroma.Web.Plugs.EnsurePublicOrAuthenticatedPlug
   alias Pleroma.Web.Plugs.OAuthScopesPlug
 
@@ -26,8 +28,9 @@ defmodule Pleroma.Web.MastoFEController do
   )
 
   @doc "GET /web/*path"
-  def index(%{assigns: %{user: user, token: token}} = conn, _params)
-      when not is_nil(user) and not is_nil(token) do
+  def index(conn, _params) do
+    with %{assigns: %{user: %User{} = user, token: %Token{app_id: token_app_id} = token}} <- conn,
+         {:ok, %{id: ^token_app_id}} <- AuthController.local_mastofe_app() do
       conn
       |> put_layout(false)
       |> render("index.html",
@@ -35,18 +38,17 @@ def index(%{assigns: %{user: user, token: token}} = conn, _params)
         user: user,
         custom_emojis: Pleroma.Emoji.get_all()
       )
-  end
-
-  def index(conn, _params) do
+    else
+      _ ->
         conn
         |> put_session(:return_to, conn.request_path)
         |> redirect(to: "/web/login")
     end
+  end
 
   @doc "GET /web/manifest.json"
   def manifest(conn, _params) do
-    conn
-    |> render("manifest.json")
+    render(conn, "manifest.json")
   end
 
   @doc "PUT /api/web/settings: Backend-obscure settings blob for MastoFE, don't parse/reuse elsewhere"

lib/pleroma/web/mastodon_api/controllers/account_controller.ex

@@ -25,7 +25,6 @@ defmodule Pleroma.Web.MastodonAPI.AccountController do
   alias Pleroma.Web.MastodonAPI.MastodonAPIController
   alias Pleroma.Web.MastodonAPI.StatusView
   alias Pleroma.Web.OAuth.OAuthController
-  alias Pleroma.Web.OAuth.OAuthView
   alias Pleroma.Web.Plugs.EnsurePublicOrAuthenticatedPlug
   alias Pleroma.Web.Plugs.OAuthScopesPlug
   alias Pleroma.Web.Plugs.RateLimiter
@@ -103,7 +102,7 @@ def create(%{assigns: %{app: app}, body_params: params} = conn, _params) do
          {:ok, user} <- TwitterAPI.register_user(params),
          {_, {:ok, token}} <-
            {:login, OAuthController.login(user, app, app.scopes)} do
-      json(conn, OAuthView.render("token.json", %{user: user, token: token}))
+      OAuthController.after_token_exchange(conn, %{user: user, token: token})
     else
       {:login, {:account_status, :confirmation_pending}} ->
         json_response(conn, :ok, %{

lib/pleroma/web/mastodon_api/controllers/auth_controller.ex

@@ -7,10 +7,13 @@ defmodule Pleroma.Web.MastodonAPI.AuthController do
 
   import Pleroma.Web.ControllerHelper, only: [json_response: 3]
 
+  alias Pleroma.Helpers.AuthHelper
+  alias Pleroma.Helpers.UriHelper
   alias Pleroma.User
   alias Pleroma.Web.OAuth.App
   alias Pleroma.Web.OAuth.Authorization
   alias Pleroma.Web.OAuth.Token
+  alias Pleroma.Web.OAuth.Token.Strategy.Revoke, as: RevokeToken
   alias Pleroma.Web.TwitterAPI.TwitterAPI
 
   action_fallback(Pleroma.Web.MastodonAPI.FallbackController)
@@ -20,24 +23,35 @@ defmodule Pleroma.Web.MastodonAPI.AuthController do
   @local_mastodon_name "Mastodon-Local"
 
   @doc "GET /web/login"
-  def login(%{assigns: %{user: %User{}}} = conn, _params) do
-    redirect(conn, to: local_mastodon_root_path(conn))
-  end
-
-  # Local Mastodon FE login init action
-  def login(conn, %{"code" => auth_token}) do
-    with {:ok, app} <- get_or_make_app(),
+  # Local Mastodon FE login callback action
+  def login(conn, %{"code" => auth_token} = params) do
+    with {:ok, app} <- local_mastofe_app(),
          {:ok, auth} <- Authorization.get_by_token(app, auth_token),
-         {:ok, token} <- Token.exchange_token(app, auth) do
+         {:ok, oauth_token} <- Token.exchange_token(app, auth) do
+      redirect_to =
         conn
-      |> put_session(:oauth_token, token.token)
-      |> redirect(to: local_mastodon_root_path(conn))
+        |> local_mastodon_post_login_path()
+        |> UriHelper.modify_uri_params(%{"access_token" => oauth_token.token})
+
+      conn
+      |> AuthHelper.put_session_token(oauth_token.token)
+      |> redirect(to: redirect_to)
+    else
+      _ -> redirect_to_oauth_form(conn, params)
     end
   end
 
-  # Local Mastodon FE callback action
-  def login(conn, _) do
-    with {:ok, app} <- get_or_make_app() do
+  def login(conn, params) do
+    with %{assigns: %{user: %User{}, token: %Token{app_id: app_id}}} <- conn,
+         {:ok, %{id: ^app_id}} <- local_mastofe_app() do
+      redirect(conn, to: local_mastodon_post_login_path(conn))
+    else
+      _ -> redirect_to_oauth_form(conn, params)
+    end
+  end
+
+  defp redirect_to_oauth_form(conn, _params) do
+    with {:ok, app} <- local_mastofe_app() do
       path =
         o_auth_path(conn, :authorize,
           response_type: "code",
@@ -52,9 +66,16 @@ def login(conn, _) do
 
   @doc "DELETE /auth/sign_out"
   def logout(conn, _) do
-    conn
-    |> clear_session
-    |> redirect(to: "/")
+    conn =
+      with %{assigns: %{token: %Token{} = oauth_token}} <- conn,
+           session_token = AuthHelper.get_session_token(conn),
+           {:ok, %Token{token: ^session_token}} <- RevokeToken.revoke(oauth_token) do
+        AuthHelper.delete_session_token(conn)
+      else
+        _ -> conn
+      end
+
+    redirect(conn, to: "/")
   end
 
   @doc "POST /auth/password"
@@ -66,7 +87,7 @@ def password_reset(conn, params) do
     json_response(conn, :no_content, "")
   end
 
-  defp local_mastodon_root_path(conn) do
+  defp local_mastodon_post_login_path(conn) do
     case get_session(conn, :return_to) do
       nil ->
         masto_fe_path(conn, :index, ["getting-started"])
@@ -77,9 +98,11 @@ defp local_mastodon_root_path(conn) do
     end
   end
 
-  @spec get_or_make_app() :: {:ok, App.t()} | {:error, Ecto.Changeset.t()}
-  defp get_or_make_app do
-    %{client_name: @local_mastodon_name, redirect_uris: "."}
-    |> App.get_or_make(["read", "write", "follow", "push", "admin"])
+  @spec local_mastofe_app() :: {:ok, App.t()} | {:error, Ecto.Changeset.t()}
+  def local_mastofe_app do
+    App.get_or_make(
+      %{client_name: @local_mastodon_name, redirect_uris: "."},
+      ["read", "write", "follow", "push", "admin"]
+    )
   end
 end

lib/pleroma/web/o_auth/mfa_controller.ex

@@ -13,7 +13,6 @@ defmodule Pleroma.Web.OAuth.MFAController do
   alias Pleroma.Web.Auth.TOTPAuthenticator
   alias Pleroma.Web.OAuth.MFAView, as: View
   alias Pleroma.Web.OAuth.OAuthController
-  alias Pleroma.Web.OAuth.OAuthView
   alias Pleroma.Web.OAuth.Token
 
   plug(:fetch_session when action in [:show, :verify])
@@ -75,7 +74,7 @@ def challenge(conn, %{"mfa_token" => mfa_token} = params) do
          {:ok, %{user: user, authorization: auth}} <- MFA.Token.validate(mfa_token),
          {:ok, _} <- validates_challenge(user, params),
          {:ok, token} <- Token.exchange_token(app, auth) do
-      json(conn, OAuthView.render("token.json", %{user: user, token: token}))
+      OAuthController.after_token_exchange(conn, %{user: user, token: token})
     else
       _error ->
         conn

lib/pleroma/web/o_auth/o_auth_controller.ex

@@ -5,6 +5,7 @@
 defmodule Pleroma.Web.OAuth.OAuthController do
   use Pleroma.Web, :controller
 
+  alias Pleroma.Helpers.AuthHelper
   alias Pleroma.Helpers.UriHelper
   alias Pleroma.Maps
   alias Pleroma.MFA
@@ -79,6 +80,13 @@ defp do_authorize(%Plug.Conn{} = conn, params) do
     available_scopes = (app && app.scopes) || []
     scopes = Scopes.fetch_scopes(params, available_scopes)
 
+    user =
+      with %{assigns: %{user: %User{} = user}} <- conn do
+        user
+      else
+        _ -> nil
+      end
+
     scopes =
       if scopes == [] do
         available_scopes
@@ -88,6 +96,8 @@ defp do_authorize(%Plug.Conn{} = conn, params) do
 
     # Note: `params` might differ from `conn.params`; use `@params` not `@conn.params` in template
     render(conn, Authenticator.auth_template(), %{
+      user: user,
+      app: app && Map.delete(app, :client_secret),
       response_type: params["response_type"],
       client_id: params["client_id"],
       available_scopes: available_scopes,
@@ -131,11 +141,13 @@ defp handle_existing_authorization(
     end
   end
 
-  def create_authorization(
-        %Plug.Conn{} = conn,
-        %{"authorization" => _} = params,
-        opts \\ []
-      ) do
+  def create_authorization(_, _, opts \\ [])
+
+  def create_authorization(%Plug.Conn{assigns: %{user: %User{} = user}} = conn, params, []) do
+    create_authorization(conn, params, user: user)
+  end
+
+  def create_authorization(%Plug.Conn{} = conn, %{"authorization" => _} = params, opts) do
     with {:ok, auth, user} <- do_create_authorization(conn, params, opts[:user]),
          {:mfa_required, _, _, false} <- {:mfa_required, user, auth, MFA.require?(user)} do
       after_create_authorization(conn, auth, params)
@@ -248,7 +260,7 @@ def token_exchange(
     with {:ok, app} <- Token.Utils.fetch_app(conn),
          {:ok, %{user: user} = token} <- Token.get_by_refresh_token(app, token),
          {:ok, token} <- RefreshToken.grant(token) do
-      json(conn, OAuthView.render("token.json", %{user: user, token: token}))
+      after_token_exchange(conn, %{user: user, token: token})
     else
       _error -> render_invalid_credentials_error(conn)
     end
@@ -260,7 +272,7 @@ def token_exchange(%Plug.Conn{} = conn, %{"grant_type" => "authorization_code"}
          {:ok, auth} <- Authorization.get_by_token(app, fixed_token),
          %User{} = user <- User.get_cached_by_id(auth.user_id),
          {:ok, token} <- Token.exchange_token(app, auth) do
-      json(conn, OAuthView.render("token.json", %{user: user, token: token}))
+      after_token_exchange(conn, %{user: user, token: token})
     else
       error ->
         handle_token_exchange_error(conn, error)
@@ -275,7 +287,7 @@ def token_exchange(
          {:ok, app} <- Token.Utils.fetch_app(conn),
          requested_scopes <- Scopes.fetch_scopes(params, app.scopes),
          {:ok, token} <- login(user, app, requested_scopes) do
-      json(conn, OAuthView.render("token.json", %{user: user, token: token}))
+      after_token_exchange(conn, %{user: user, token: token})
     else
       error ->
         handle_token_exchange_error(conn, error)
@@ -298,7 +310,7 @@ def token_exchange(%Plug.Conn{} = conn, %{"grant_type" => "client_credentials"}
     with {:ok, app} <- Token.Utils.fetch_app(conn),
          {:ok, auth} <- Authorization.create_authorization(app, %User{}),
          {:ok, token} <- Token.exchange_token(app, auth) do
-      json(conn, OAuthView.render("token.json", %{token: token}))
+      after_token_exchange(conn, %{token: token})
     else
       _error ->
         handle_token_exchange_error(conn, :invalid_credentails)
@@ -308,6 +320,12 @@ def token_exchange(%Plug.Conn{} = conn, %{"grant_type" => "client_credentials"}
   # Bad request
   def token_exchange(%Plug.Conn{} = conn, params), do: bad_request(conn, params)
 
+  def after_token_exchange(%Plug.Conn{} = conn, %{token: token} = view_params) do
+    conn
+    |> AuthHelper.put_session_token(token.token)
+    |> json(OAuthView.render("token.json", view_params))
+  end
+
   defp handle_token_exchange_error(%Plug.Conn{} = conn, {:mfa_required, user, auth, _}) do
     conn
     |> put_status(:forbidden)
@@ -361,9 +379,17 @@ defp handle_token_exchange_error(%Plug.Conn{} = conn, _error) do
     render_invalid_credentials_error(conn)
   end
 
-  def token_revoke(%Plug.Conn{} = conn, %{"token" => _token} = params) do
-    with {:ok, app} <- Token.Utils.fetch_app(conn),
-         {:ok, _token} <- RevokeToken.revoke(app, params) do
+  def token_revoke(%Plug.Conn{} = conn, %{"token" => token}) do
+    with {:ok, %Token{} = oauth_token} <- Token.get_by_token(token),
+         {:ok, oauth_token} <- RevokeToken.revoke(oauth_token) do
+      conn =
+        with session_token = AuthHelper.get_session_token(conn),
+             %Token{token: ^session_token} <- oauth_token do
+          AuthHelper.delete_session_token(conn)
+        else
+          _ -> conn
+        end
+
       json(conn, %{})
     else
       _error ->

lib/pleroma/web/o_auth/token.ex

@@ -27,6 +27,14 @@ defmodule Pleroma.Web.OAuth.Token do
     timestamps()
   end
 
+  @doc "Gets token by unique access token"
+  @spec get_by_token(String.t()) :: {:ok, t()} | {:error, :not_found}
+  def get_by_token(token) do
+    token
+    |> Query.get_by_token()
+    |> Repo.find_resource()
+  end
+
   @doc "Gets token for app by access token"
   @spec get_by_token(App.t(), String.t()) :: {:ok, t()} | {:error, :not_found}
   def get_by_token(%App{id: app_id} = _app, token) do

lib/pleroma/web/plugs/admin_secret_authentication_plug.ex

@@ -5,21 +5,14 @@
 defmodule Pleroma.Web.Plugs.AdminSecretAuthenticationPlug do
   import Plug.Conn
 
+  alias Pleroma.Helpers.AuthHelper
   alias Pleroma.User
-  alias Pleroma.Web.Plugs.OAuthScopesPlug
   alias Pleroma.Web.Plugs.RateLimiter
 
   def init(options) do
     options
   end
 
-  def secret_token do
-    case Pleroma.Config.get(:admin_token) do
-      blank when blank in [nil, ""] -> nil
-      token -> token
-    end
-  end
-
   def call(%{assigns: %{user: %User{}}} = conn, _), do: conn
 
   def call(conn, _) do
@@ -30,7 +23,7 @@ def call(conn, _) do
     end
   end
 
-  def authenticate(%{params: %{"admin_token" => admin_token}} = conn) do
+  defp authenticate(%{params: %{"admin_token" => admin_token}} = conn) do
     if admin_token == secret_token() do
       assign_admin_user(conn)
     else
@@ -38,7 +31,7 @@ def authenticate(%{params: %{"admin_token" => admin_token}} = conn) do
     end
   end
 
-  def authenticate(conn) do
+  defp authenticate(conn) do
     token = secret_token()
 
     case get_req_header(conn, "x-admin-token") do
@@ -48,10 +41,17 @@ def authenticate(conn) do
     end
   end
 
+  defp secret_token do
+    case Pleroma.Config.get(:admin_token) do
+      blank when blank in [nil, ""] -> nil
+      token -> token
+    end
+  end
+
   defp assign_admin_user(conn) do
     conn
     |> assign(:user, %User{is_admin: true})
-    |> OAuthScopesPlug.skip_plug()
+    |> AuthHelper.skip_oauth()
   end
 
   defp handle_bad_token(conn) do

lib/pleroma/web/plugs/authentication_plug.ex

@@ -3,6 +3,9 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.Plugs.AuthenticationPlug do
+  @moduledoc "Password authentication plug."
+
+  alias Pleroma.Helpers.AuthHelper
   alias Pleroma.User
 
   import Plug.Conn
@@ -11,6 +14,30 @@ defmodule Pleroma.Web.Plugs.AuthenticationPlug do
 
   def init(options), do: options
 
+  def call(%{assigns: %{user: %User{}}} = conn, _), do: conn
+
+  def call(
+        %{
+          assigns: %{
+            auth_user: %{password_hash: password_hash} = auth_user,
+            auth_credentials: %{password: password}
+          }
+        } = conn,
+        _
+      ) do
+    if checkpw(password, password_hash) do
+      {:ok, auth_user} = maybe_update_password(auth_user, password)
+
+      conn
+      |> assign(:user, auth_user)
+      |> AuthHelper.skip_oauth()
+    else
+      conn
+    end
+  end
+
+  def call(conn, _), do: conn
+
   def checkpw(password, "$6" <> _ = password_hash) do
     :crypt.crypt(password, password_hash) == password_hash
   end
@@ -40,40 +67,6 @@ def maybe_update_password(%User{password_hash: "$6" <> _} = user, password) do
   def maybe_update_password(user, _), do: {:ok, user}
 
   defp do_update_password(user, password) do
-    user
-    |> User.password_update_changeset(%{
-      "password" => password,
-      "password_confirmation" => password
-    })
-    |> Pleroma.Repo.update()
-  end
-
-  def call(%{assigns: %{user: %User{}}} = conn, _), do: conn
-
-  def call(
-        %{
-          assigns: %{
-            auth_user: %{password_hash: password_hash} = auth_user,
-            auth_credentials: %{password: password}
-          }
-        } = conn,
-        _
-      ) do
-    if checkpw(password, password_hash) do
-      {:ok, auth_user} = maybe_update_password(auth_user, password)
-
-      conn
-      |> assign(:user, auth_user)
-      |> Pleroma.Web.Plugs.OAuthScopesPlug.skip_plug()
-    else
-      conn
+    User.reset_password(user, %{password: password, password_confirmation: password})
   end
 end
-
-  def call(%{assigns: %{auth_credentials: %{password: _}}} = conn, _) do
-    Pbkdf2.no_user_verify()
-    conn
-  end
-
-  def call(conn, _), do: conn
-end

lib/pleroma/web/plugs/basic_auth_decoder_plug.ex

@@ -3,6 +3,12 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.Plugs.BasicAuthDecoderPlug do
+  @moduledoc """
+  Decodes HTTP Basic Auth information and assigns `:auth_credentials`.
+
+  NOTE: no checks are performed at this step, auth_credentials/username could be easily faked.
+  """
+
   import Plug.Conn
 
   def init(options) do

lib/pleroma/web/plugs/ensure_user_key_plug.ex

@@ -1,18 +0,0 @@
-# Pleroma: A lightweight social networking server
-# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
-# SPDX-License-Identifier: AGPL-3.0-only
-
-defmodule Pleroma.Web.Plugs.EnsureUserKeyPlug do
-  import Plug.Conn
-
-  def init(opts) do
-    opts
-  end
-
-  def call(%{assigns: %{user: _}} = conn, _), do: conn
-
-  def call(conn, _) do
-    conn
-    |> assign(:user, nil)
-  end
-end

lib/pleroma/web/plugs/ensure_user_token_assigns_plug.ex

@@ -0,0 +1,36 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.Plugs.EnsureUserTokenAssignsPlug do
+  import Plug.Conn
+
+  alias Pleroma.Helpers.AuthHelper
+  alias Pleroma.User
+  alias Pleroma.Web.OAuth.Token
+
+  @moduledoc "Ensures presence and consistency of :user and :token assigns."
+
+  def init(opts) do
+    opts
+  end
+
+  def call(%{assigns: %{user: %User{id: user_id}} = assigns} = conn, _) do
+    with %Token{user_id: ^user_id} <- assigns[:token] do
+      conn
+    else
+      %Token{} ->
+        # A safety net for abnormal (unexpected) scenario: :token belongs to another user
+        AuthHelper.drop_auth_info(conn)
+
+      _ ->
+        assign(conn, :token, nil)
+    end
+  end
+
+  def call(conn, _) do
+    conn
+    |> assign(:user, nil)
+    |> assign(:token, nil)
+  end
+end

lib/pleroma/web/plugs/legacy_authentication_plug.ex

@@ -1,41 +0,0 @@
-# Pleroma: A lightweight social networking server
-# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
-# SPDX-License-Identifier: AGPL-3.0-only
-
-defmodule Pleroma.Web.Plugs.LegacyAuthenticationPlug do
-  import Plug.Conn
-
-  alias Pleroma.User
-
-  def init(options) do
-    options
-  end
-
-  def call(%{assigns: %{user: %User{}}} = conn, _), do: conn
-
-  def call(
-        %{
-          assigns: %{
-            auth_user: %{password_hash: "$6$" <> _ = password_hash} = auth_user,
-            auth_credentials: %{password: password}
-          }
-        } = conn,
-        _
-      ) do
-    with ^password_hash <- :crypt.crypt(password, password_hash),
-         {:ok, user} <-
-           User.reset_password(auth_user, %{password: password, password_confirmation: password}) do
-      conn
-      |> assign(:auth_user, user)
-      |> assign(:user, user)
-      |> Pleroma.Web.Plugs.OAuthScopesPlug.skip_plug()
-    else
-      _ ->
-        conn
-    end
-  end
-
-  def call(conn, _) do
-    conn
-  end
-end

lib/pleroma/web/plugs/mapped_signature_to_identity_plug.ex

@@ -3,6 +3,7 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.Plugs.MappedSignatureToIdentityPlug do
+  alias Pleroma.Helpers.AuthHelper
   alias Pleroma.Signature
   alias Pleroma.User
   alias Pleroma.Web.ActivityPub.Utils
@@ -12,6 +13,47 @@ defmodule Pleroma.Web.Plugs.MappedSignatureToIdentityPlug do
 
   def init(options), do: options
 
+  def call(%{assigns: %{user: %User{}}} = conn, _opts), do: conn
+
+  # if this has payload make sure it is signed by the same actor that made it
+  def call(%{assigns: %{valid_signature: true}, params: %{"actor" => actor}} = conn, _opts) do
+    with actor_id <- Utils.get_ap_id(actor),
+         {:user, %User{} = user} <- {:user, user_from_key_id(conn)},
+         {:user_match, true} <- {:user_match, user.ap_id == actor_id} do
+      conn
+      |> assign(:user, user)
+      |> AuthHelper.skip_oauth()
+    else
+      {:user_match, false} ->
+        Logger.debug("Failed to map identity from signature (payload actor mismatch)")
+        Logger.debug("key_id=#{inspect(key_id_from_conn(conn))}, actor=#{inspect(actor)}")
+        assign(conn, :valid_signature, false)
+
+      # remove me once testsuite uses mapped capabilities instead of what we do now
+      {:user, nil} ->
+        Logger.debug("Failed to map identity from signature (lookup failure)")
+        Logger.debug("key_id=#{inspect(key_id_from_conn(conn))}, actor=#{actor}")
+        conn
+    end
+  end
+
+  # no payload, probably a signed fetch
+  def call(%{assigns: %{valid_signature: true}} = conn, _opts) do
+    with %User{} = user <- user_from_key_id(conn) do
+      conn
+      |> assign(:user, user)
+      |> AuthHelper.skip_oauth()
+    else
+      _ ->
+        Logger.debug("Failed to map identity from signature (no payload actor mismatch)")
+        Logger.debug("key_id=#{inspect(key_id_from_conn(conn))}")
+        assign(conn, :valid_signature, false)
+    end
+  end
+
+  # no signature at all
+  def call(conn, _opts), do: conn
+
   defp key_id_from_conn(conn) do
     with %{"keyId" => key_id} <- HTTPSignatures.signature_for_conn(conn),
          {:ok, ap_id} <- Signature.key_id_to_actor_id(key_id) do
@@ -31,41 +73,4 @@ defp user_from_key_id(conn) do
         nil
     end
   end
-
-  def call(%{assigns: %{user: _}} = conn, _opts), do: conn
-
-  # if this has payload make sure it is signed by the same actor that made it
-  def call(%{assigns: %{valid_signature: true}, params: %{"actor" => actor}} = conn, _opts) do
-    with actor_id <- Utils.get_ap_id(actor),
-         {:user, %User{} = user} <- {:user, user_from_key_id(conn)},
-         {:user_match, true} <- {:user_match, user.ap_id == actor_id} do
-      assign(conn, :user, user)
-    else
-      {:user_match, false} ->
-        Logger.debug("Failed to map identity from signature (payload actor mismatch)")
-        Logger.debug("key_id=#{inspect(key_id_from_conn(conn))}, actor=#{inspect(actor)}")
-        assign(conn, :valid_signature, false)
-
-      # remove me once testsuite uses mapped capabilities instead of what we do now
-      {:user, nil} ->
-        Logger.debug("Failed to map identity from signature (lookup failure)")
-        Logger.debug("key_id=#{inspect(key_id_from_conn(conn))}, actor=#{actor}")
-        conn
-    end
-  end
-
-  # no payload, probably a signed fetch
-  def call(%{assigns: %{valid_signature: true}} = conn, _opts) do
-    with %User{} = user <- user_from_key_id(conn) do
-      assign(conn, :user, user)
-    else
-      _ ->
-        Logger.debug("Failed to map identity from signature (no payload actor mismatch)")
-        Logger.debug("key_id=#{inspect(key_id_from_conn(conn))}")
-        assign(conn, :valid_signature, false)
-    end
-  end
-
-  # no signature at all
-  def call(conn, _opts), do: conn
 end

lib/pleroma/web/plugs/o_auth_plug.ex

@@ -3,9 +3,12 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.Plugs.OAuthPlug do
+  @moduledoc "Performs OAuth authentication by token from params / headers / cookies."
+
   import Plug.Conn
   import Ecto.Query
 
+  alias Pleroma.Helpers.AuthHelper
   alias Pleroma.Repo
   alias Pleroma.User
   alias Pleroma.Web.OAuth.App
@@ -17,45 +20,26 @@ def init(options), do: options
 
   def call(%{assigns: %{user: %User{}}} = conn, _), do: conn
 
-  def call(%{params: %{"access_token" => access_token}} = conn, _) do
-    with {:ok, user, token_record} <- fetch_user_and_token(access_token) do
-      conn
-      |> assign(:token, token_record)
-      |> assign(:user, user)
-    else
-      _ ->
-        # token found, but maybe only with app
-        with {:ok, app, token_record} <- fetch_app_and_token(access_token) do
-          conn
-          |> assign(:token, token_record)
-          |> assign(:app, app)
-        else
-          _ -> conn
-        end
-    end
-  end
-
   def call(conn, _) do
-    case fetch_token_str(conn) do
-      {:ok, token} ->
-        with {:ok, user, token_record} <- fetch_user_and_token(token) do
+    with {:ok, token_str} <- fetch_token_str(conn) do
+      with {:ok, user, user_token} <- fetch_user_and_token(token_str),
+           false <- Token.is_expired?(user_token) do
         conn
-          |> assign(:token, token_record)
+        |> assign(:token, user_token)
         |> assign(:user, user)
       else
         _ ->
-            # token found, but maybe only with app
-            with {:ok, app, token_record} <- fetch_app_and_token(token) do
+          with {:ok, app, app_token} <- fetch_app_and_token(token_str),
+               false <- Token.is_expired?(app_token) do
             conn
-              |> assign(:token, token_record)
+            |> assign(:token, app_token)
             |> assign(:app, app)
           else
             _ -> conn
           end
       end
-
-      _ ->
-        conn
+    else
+      _ -> conn
     end
   end
 
@@ -70,7 +54,6 @@ defp fetch_user_and_token(token) do
         preload: [user: user]
       )
 
-    # credo:disable-for-next-line Credo.Check.Readability.MaxLineLength
     with %Token{user: user} = token_record <- Repo.one(query) do
       {:ok, user, token_record}
     end
@@ -86,28 +69,22 @@ defp fetch_app_and_token(token) do
     end
   end
 
-  # Gets token from session by :oauth_token key
+  # Gets token string from conn (in params / headers / session)
   #
-  @spec fetch_token_from_session(Plug.Conn.t()) :: :no_token_found | {:ok, String.t()}
-  defp fetch_token_from_session(conn) do
-    case get_session(conn, :oauth_token) do
-      nil -> :no_token_found
-      token -> {:ok, token}
-    end
+  @spec fetch_token_str(Plug.Conn.t() | list(String.t())) :: :no_token_found | {:ok, String.t()}
+  defp fetch_token_str(%Plug.Conn{params: %{"access_token" => access_token}} = _conn) do
+    {:ok, access_token}
   end
 
-  # Gets token from headers
-  #
-  @spec fetch_token_str(Plug.Conn.t()) :: :no_token_found | {:ok, String.t()}
   defp fetch_token_str(%Plug.Conn{} = conn) do
     headers = get_req_header(conn, "authorization")
 
-    with :no_token_found <- fetch_token_str(headers),
-         do: fetch_token_from_session(conn)
+    with {:ok, token} <- fetch_token_str(headers) do
+      {:ok, token}
+    else
+      _ -> fetch_token_from_session(conn)
+    end
   end
-
-  @spec fetch_token_str(Keyword.t()) :: :no_token_found | {:ok, String.t()}
-  defp fetch_token_str([]), do: :no_token_found
 
   defp fetch_token_str([token | tail]) do
     trimmed_token = String.trim(token)
@@ -117,4 +94,14 @@ defp fetch_token_str([token | tail]) do
       _ -> fetch_token_str(tail)
     end
   end
+
+  defp fetch_token_str([]), do: :no_token_found
+
+  @spec fetch_token_from_session(Plug.Conn.t()) :: :no_token_found | {:ok, String.t()}
+  defp fetch_token_from_session(conn) do
+    case AuthHelper.get_session_token(conn) do
+      nil -> :no_token_found
+      token -> {:ok, token}
+    end
+  end
 end

lib/pleroma/web/plugs/o_auth_scopes_plug.ex

@@ -7,6 +7,7 @@ defmodule Pleroma.Web.Plugs.OAuthScopesPlug do
   import Pleroma.Web.Gettext
 
   alias Pleroma.Config
+  alias Pleroma.Helpers.AuthHelper
 
   use Pleroma.Web, :plug
 
@@ -28,7 +29,7 @@ def perform(%Plug.Conn{assigns: assigns} = conn, %{scopes: scopes} = options) do
         conn
 
       options[:fallback] == :proceed_unauthenticated ->
-        drop_auth_info(conn)
+        AuthHelper.drop_auth_info(conn)
 
       true ->
         missing_scopes = scopes -- matched_scopes
@@ -44,15 +45,6 @@ def perform(%Plug.Conn{assigns: assigns} = conn, %{scopes: scopes} = options) do
     end
   end
 
-  @doc "Drops authentication info from connection"
-  def drop_auth_info(conn) do
-    # To simplify debugging, setting a private variable on `conn` if auth info is dropped
-    conn
-    |> put_private(:authentication_ignored, true)
-    |> assign(:user, nil)
-    |> assign(:token, nil)
-  end
-
   @doc "Keeps those of `scopes` which are descendants of `supported_scopes`"
   def filter_descendants(scopes, supported_scopes) do
     Enum.filter(

lib/pleroma/web/plugs/session_authentication_plug.ex

@@ -1,21 +0,0 @@
-# Pleroma: A lightweight social networking server
-# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
-# SPDX-License-Identifier: AGPL-3.0-only
-
-defmodule Pleroma.Web.Plugs.SessionAuthenticationPlug do
-  import Plug.Conn
-
-  def init(options) do
-    options
-  end
-
-  def call(conn, _) do
-    with saved_user_id <- get_session(conn, :user_id),
-         %{auth_user: %{id: ^saved_user_id}} <- conn.assigns do
-      conn
-      |> assign(:user, conn.assigns.auth_user)
-    else
-      _ -> conn
-    end
-  end
-end

lib/pleroma/web/plugs/set_user_session_id_plug.ex

@@ -3,16 +3,15 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.Plugs.SetUserSessionIdPlug do
-  import Plug.Conn
-  alias Pleroma.User
+  alias Pleroma.Helpers.AuthHelper
+  alias Pleroma.Web.OAuth.Token
 
   def init(opts) do
     opts
   end
 
-  def call(%{assigns: %{user: %User{id: id}}} = conn, _) do
-    conn
-    |> put_session(:user_id, id)
+  def call(%{assigns: %{token: %Token{} = oauth_token}} = conn, _) do
+    AuthHelper.put_session_token(conn, oauth_token.token)
   end
 
   def call(conn, _), do: conn

lib/pleroma/web/plugs/user_enabled_plug.ex

@@ -3,7 +3,7 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.Plugs.UserEnabledPlug do
-  import Plug.Conn
+  alias Pleroma.Helpers.AuthHelper
   alias Pleroma.User
 
   def init(options) do
@@ -11,9 +11,10 @@ def init(options) do
   end
 
   def call(%{assigns: %{user: %User{} = user}} = conn, _) do
-    case User.account_status(user) do
-      :active -> conn
-      _ -> assign(conn, :user, nil)
+    if User.account_status(user) == :active do
+      conn
+    else
+      AuthHelper.drop_auth_info(conn)
     end
   end
 

lib/pleroma/web/plugs/user_fetcher_plug.ex

@@ -3,6 +3,12 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.Plugs.UserFetcherPlug do
+  @moduledoc """
+  Assigns `:auth_user` basing on `:auth_credentials`.
+
+  NOTE: no checks are performed at this step, auth_credentials/username could be easily faked.
+  """
+
   alias Pleroma.User
   import Plug.Conn
 

lib/pleroma/web/router.ex

@@ -34,6 +34,7 @@ defmodule Pleroma.Web.Router do
     plug(:fetch_session)
     plug(Pleroma.Web.Plugs.OAuthPlug)
     plug(Pleroma.Web.Plugs.UserEnabledPlug)
+    plug(Pleroma.Web.Plugs.EnsureUserTokenAssignsPlug)
   end
 
   pipeline :expect_authentication do
@@ -48,15 +49,13 @@ defmodule Pleroma.Web.Router do
     plug(Pleroma.Web.Plugs.OAuthPlug)
     plug(Pleroma.Web.Plugs.BasicAuthDecoderPlug)
     plug(Pleroma.Web.Plugs.UserFetcherPlug)
-    plug(Pleroma.Web.Plugs.SessionAuthenticationPlug)
-    plug(Pleroma.Web.Plugs.LegacyAuthenticationPlug)
     plug(Pleroma.Web.Plugs.AuthenticationPlug)
   end
 
   pipeline :after_auth do
     plug(Pleroma.Web.Plugs.UserEnabledPlug)
     plug(Pleroma.Web.Plugs.SetUserSessionIdPlug)
-    plug(Pleroma.Web.Plugs.EnsureUserKeyPlug)
+    plug(Pleroma.Web.Plugs.EnsureUserTokenAssignsPlug)
   end
 
   pipeline :base_api do
@@ -100,7 +99,7 @@ defmodule Pleroma.Web.Router do
   pipeline :pleroma_html do
     plug(:browser)
     plug(:authenticate)
-    plug(Pleroma.Web.Plugs.EnsureUserKeyPlug)
+    plug(Pleroma.Web.Plugs.EnsureUserTokenAssignsPlug)
   end
 
   pipeline :well_known do
@@ -292,7 +291,6 @@ defmodule Pleroma.Web.Router do
 
     post("/main/ostatus", UtilController, :remote_subscribe)
     get("/ostatus_subscribe", RemoteFollowController, :follow)
-
     post("/ostatus_subscribe", RemoteFollowController, :do_follow)
   end
 
@@ -321,20 +319,26 @@ defmodule Pleroma.Web.Router do
   end
 
   scope "/oauth", Pleroma.Web.OAuth do
-    scope [] do
-      pipe_through(:oauth)
-      get("/authorize", OAuthController, :authorize)
-    end
-
-    post("/authorize", OAuthController, :create_authorization)
-    post("/token", OAuthController, :token_exchange)
-    post("/revoke", OAuthController, :token_revoke)
     get("/registration_details", OAuthController, :registration_details)
 
-    post("/mfa/challenge", MFAController, :challenge)
     post("/mfa/verify", MFAController, :verify, as: :mfa_verify)
     get("/mfa", MFAController, :show)
 
+    scope [] do
+      pipe_through(:oauth)
+
+      get("/authorize", OAuthController, :authorize)
+      post("/authorize", OAuthController, :create_authorization)
+    end
+
+    scope [] do
+      pipe_through(:fetch_session)
+
+      post("/token", OAuthController, :token_exchange)
+      post("/revoke", OAuthController, :token_revoke)
+      post("/mfa/challenge", MFAController, :challenge)
+    end
+
     scope [] do
       pipe_through(:browser)
 

lib/pleroma/web/templates/layout/app.html.eex

@@ -1,233 +1,19 @@
 <!DOCTYPE html>
-<html>
+<html lang="en">
   <head>
-    <meta charset="utf-8" />
-    <meta name="viewport" content="width=device-width,initial-scale=1,minimal-ui" />
-    <title>
-    <%= Pleroma.Config.get([:instance, :name]) %>
-    </title>
-    <style>
-      body {
-        background-color: #121a24;
-        font-family: sans-serif;
-        color: #b9b9ba;
-        text-align: center;
-      }
-
-      .container {
-        max-width: 420px;
-        padding: 20px;
-        background-color: #182230;
-        border-radius: 4px;
-        margin: auto;
-        margin-top: 10vh;
-        box-shadow: 0 1px 4px 0px rgba(0, 0, 0, 0.5);
-      }
-
-      h1 {
-        margin: 0;
-        font-size: 24px;
-      }
-
-      h2 {
-        color: #b9b9ba;
-        font-weight: normal;
-        font-size: 18px;
-        margin-bottom: 20px;
-      }
-
-      a {
-        color: #d8a070;
-        text-decoration: none;
-      }
-
-      form {
-        width: 100%;
-      }
-
-      .input {
-        text-align: left;
-        color: #89898a;
-        display: flex;
-        flex-direction: column;
-      }
-
-      input {
-        box-sizing: content-box;
-        padding: 10px;
-        margin-top: 5px;
-        margin-bottom: 10px;
-        background-color: #121a24;
-        color: #b9b9ba;
-        border: 0;
-        transition-property: border-bottom;
-        transition-duration: 0.35s;
-        border-bottom: 2px solid #2a384a;
-        font-size: 14px;
-      }
-
-      .scopes-input {
-        display: flex;
-        flex-direction: column;
-        margin-top: 1em;
-        text-align: left;
-        color: #89898a;
-      }
-
-      .scopes-input label:first-child {
-        height: 2em;
-      }
-
-      .scopes {
-        display: flex;
-        flex-wrap: wrap;
-        text-align: left;
-        color: #b9b9ba;
-      }
-
-      .scope {
-        display: flex;
-        flex-basis: 100%;
-        height: 2em;
-        align-items: center;
-      }
-
-      .scope:before {
-        color: #b9b9ba;
-        content: "✔\fe0e";
-        margin-left: 1em;
-        margin-right: 1em;
-      }
-
-      [type="checkbox"] + label {
-        display: none;
-        cursor: pointer;
-        margin: 0.5em;
-      }
-
-      [type="checkbox"] {
-        display: none;
-      }
-
-      [type="checkbox"] + label:before {
-        cursor: pointer;
-        display: inline-block;
-        color: white;
-        background-color: #121a24;
-        border: 4px solid #121a24;
-        box-shadow: 0px 0px 1px 0 #d8a070;
-        box-sizing: border-box;
-        width: 1.2em;
-        height: 1.2em;
-        margin-right: 1.0em;
-        content: "";
-        transition-property: background-color;
-        transition-duration: 0.35s;
-        color: #121a24;
-        margin-bottom: -0.2em;
-        border-radius: 2px;
-      }
-
-      [type="checkbox"]:checked + label:before {
-        background-color: #d8a070;
-      }
-
-      input:focus {
-        outline: none;
-        border-bottom: 2px solid #d8a070;
-      }
-
-      button {
-        box-sizing: border-box;
-        width: 100%;
-        background-color: #1c2a3a;
-        color: #b9b9ba;
-        border-radius: 4px;
-        border: none;
-        padding: 10px;
-        margin-top: 20px;
-        margin-bottom: 20px;
-        text-transform: uppercase;
-        font-size: 16px;
-        box-shadow: 0px 0px 2px 0px black,
-          0px 1px 0px 0px rgba(255, 255, 255, 0.2) inset,
-          0px -1px 0px 0px rgba(0, 0, 0, 0.2) inset;
-      }
-
-      button:hover {
-        cursor: pointer;
-        box-shadow: 0px 0px 0px 1px #d8a070,
-          0px 1px 0px 0px rgba(255, 255, 255, 0.2) inset,
-          0px -1px 0px 0px rgba(0, 0, 0, 0.2) inset;
-      }
-
-      .alert-danger {
-        box-sizing: border-box;
-        width: 100%;
-        background-color: #931014;
-        border: 1px solid #a06060;
-        border-radius: 4px;
-        padding: 10px;
-        margin-top: 20px;
-        font-weight: 500;
-        font-size: 16px;
-      }
-
-      .alert-info {
-        box-sizing: border-box;
-        width: 100%;
-        border-radius: 4px;
-        border: 1px solid #7d796a;
-        padding: 10px;
-        margin-top: 20px;
-        font-weight: 500;
-        font-size: 16px;
-      }
-
-      @media all and (max-width: 440px) {
-        .container {
-          margin-top: 0
-        }
-
-        .scope {
-          flex-basis: 0%;
-        }
-
-        .scope:before {
-          content: "";
-          margin-left: 0em;
-          margin-right: 1em;
-        }
-
-        .scope:first-child:before {
-          margin-left: 1em;
-          content: "✔\fe0e";
-        }
-
-        .scope:after {
-          content: ",";
-        }
-
-        .scope:last-child:after {
-          content: "";
-        }
-      }
-      .form-row {
-        display: flex;
-      }
-      .form-row > label {
-        text-align: left;
-        line-height: 47px;
-        flex: 1;
-      }
-      .form-row > input {
-        flex: 2;
-      }
-    </style>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width,initial-scale=1,minimal-ui">
+    <title><%= Pleroma.Config.get([:instance, :name]) %></title>
+    <link rel="stylesheet" href="/instance/static.css">
   </head>
   <body>
+    <div class="instance-header">
+      <a class="instance-header__content" href="/">
+        <img class="instance-header__thumbnail" src="<%= Pleroma.Config.get([:instance, :instance_thumbnail]) %>">
+        <h1 class="instance-header__title"><%= Pleroma.Config.get([:instance, :name]) %></h1>
+      </a>
+    </div>
     <div class="container">
-      <h1><%= Pleroma.Config.get([:instance, :name]) %></h1>
       <%= @inner_content %>
     </div>
   </body>

lib/pleroma/web/templates/o_auth/o_auth/show.html.eex

@@ -5,9 +5,31 @@
 <p class="alert alert-danger" role="alert"><%= get_flash(@conn, :error) %></p>
 <% end %>
 
-<h2>OAuth Authorization</h2>
 <%= form_for @conn, o_auth_path(@conn, :authorize), [as: "authorization"], fn f -> %>
 
+<%= if @user do %>
+  <div class="account-header">
+    <div class="account-header__banner" style="background-image: url('<%= Pleroma.User.banner_url(@user) %>')"></div>
+    <div class="account-header__avatar" style="background-image: url('<%= Pleroma.User.avatar_url(@user) %>')"></div>
+    <div class="account-header__meta">
+      <div class="account-header__display-name"><%= @user.name %></div>
+      <div class="account-header__nickname">@<%= @user.nickname %>@<%= Pleroma.User.get_host(@user) %></div>
+    </div>
+  </div>
+<% end %>
+
+<div class="container__content">
+  <%= if @app do %>
+    <p>Application <strong><%= @app.client_name %></strong> is requesting access to your account.</p>
+    <%= render @view_module, "_scopes.html", Map.merge(assigns, %{form: f}) %>
+  <% end %>
+
+  <%= if @user do %>
+    <div class="actions">
+      <a class="button button--cancel" href="/">Cancel</a>
+      <%= submit "Approve", class: "button--approve" %>
+    </div>
+  <% else %>
     <%= if @params["registration"] in ["true", true] do %>
       <h3>This is the first time you visit! Please enter your Pleroma handle.</h3>
       <p>Choose carefully! You won't be able to change this later. You will be able to change your display name, though.</p>
@@ -28,8 +50,9 @@
         <%= password_input f, :password %>
       </div>
       <%= submit "Log In" %>
-  <%= render @view_module, "_scopes.html", Map.merge(assigns, %{form: f}) %>
     <% end %>
+  <% end %>
+</div>
 
 <%= hidden_input f, :client_id, value: @client_id %>
 <%= hidden_input f, :response_type, value: @response_type %>
@@ -40,4 +63,3 @@
 <%= if Pleroma.Config.oauth_consumer_enabled?() do %>
   <%= render @view_module, Pleroma.Web.Auth.Authenticator.oauth_consumer_template(), assigns %>
 <% end %>
-

test/pleroma/user_test.exs

@@ -2176,4 +2176,9 @@ test "avatar fallback" do
 
     assert User.avatar_url(user, no_default: true) == nil
   end
+
+  test "get_host/1" do
+    user = insert(:user, ap_id: "https://lain.com/users/lain", nickname: "lain")
+    assert User.get_host(user) == "lain.com"
+  end
 end

test/pleroma/web/admin_api/controllers/admin_api_controller_test.exs

@@ -941,7 +941,6 @@ test "it resend emails for two users", %{conn: conn, admin: admin} do
 
   describe "/api/pleroma/admin/stats" do
     test "status visibility count", %{conn: conn} do
-      admin = insert(:user, is_admin: true)
       user = insert(:user)
       CommonAPI.post(user, %{visibility: "public", status: "hey"})
       CommonAPI.post(user, %{visibility: "unlisted", status: "hey"})
@@ -949,7 +948,6 @@ test "status visibility count", %{conn: conn} do
 
       response =
         conn
-        |> assign(:user, admin)
         |> get("/api/pleroma/admin/stats")
         |> json_response(200)
 
@@ -958,7 +956,6 @@ test "status visibility count", %{conn: conn} do
     end
 
     test "by instance", %{conn: conn} do
-      admin = insert(:user, is_admin: true)
       user1 = insert(:user)
       instance2 = "instance2.tld"
       user2 = insert(:user, %{ap_id: "https://#{instance2}/@actor"})
@@ -969,7 +966,6 @@ test "by instance", %{conn: conn} do
 
       response =
         conn
-        |> assign(:user, admin)
         |> get("/api/pleroma/admin/stats", instance: instance2)
         |> json_response(200)
 

test/pleroma/web/admin_api/controllers/config_controller_test.exs

@@ -1417,11 +1417,7 @@ test "enables the welcome messages", %{conn: conn} do
 
   describe "GET /api/pleroma/admin/config/descriptions" do
     test "structure", %{conn: conn} do
-      admin = insert(:user, is_admin: true)
-
-      conn =
-        assign(conn, :user, admin)
-        |> get("/api/pleroma/admin/config/descriptions")
+      conn = get(conn, "/api/pleroma/admin/config/descriptions")
 
       assert [child | _others] = json_response_and_validate_schema(conn, 200)
 
@@ -1439,11 +1435,7 @@ test "filters by database configuration whitelist", %{conn: conn} do
         {:esshd}
       ])
 
-      admin = insert(:user, is_admin: true)
-
-      conn =
-        assign(conn, :user, admin)
-        |> get("/api/pleroma/admin/config/descriptions")
+      conn = get(conn, "/api/pleroma/admin/config/descriptions")
 
       children = json_response_and_validate_schema(conn, 200)
 

test/pleroma/web/mastodon_api/controllers/auth_controller_test.exs

@@ -39,7 +39,7 @@ test "redirects to the saved path after log in", %{conn: conn, path: path} do
         |> get("/web/login", %{code: auth.token})
 
       assert conn.status == 302
-      assert redirected_to(conn) == path
+      assert redirected_to(conn) =~ path
     end
 
     test "redirects to the getting-started page when referer is not present", %{conn: conn} do
@@ -49,7 +49,7 @@ test "redirects to the getting-started page when referer is not present", %{conn
       conn = get(conn, "/web/login", %{code: auth.token})
 
       assert conn.status == 302
-      assert redirected_to(conn) == "/web/getting-started"
+      assert redirected_to(conn) =~ "/web/getting-started"
     end
   end
 

test/pleroma/web/mastodon_api/masto_fe_controller_test.exs

@@ -64,7 +64,8 @@ test "redirects not logged-in users to the login page on private instances", %{
     end
 
     test "does not redirect logged in users to the login page", %{conn: conn, path: path} do
-      token = insert(:oauth_token, scopes: ["read"])
+      {:ok, app} = Pleroma.Web.MastodonAPI.AuthController.local_mastofe_app()
+      token = insert(:oauth_token, app: app, scopes: ["read"])
 
       conn =
         conn

test/pleroma/web/o_auth/o_auth_controller_test.exs

@@ -4,8 +4,10 @@
 
 defmodule Pleroma.Web.OAuth.OAuthControllerTest do
   use Pleroma.Web.ConnCase
+
   import Pleroma.Factory
 
+  alias Pleroma.Helpers.AuthHelper
   alias Pleroma.MFA
   alias Pleroma.MFA.TOTP
   alias Pleroma.Repo
@@ -454,7 +456,7 @@ test "renders authentication page if user is already authenticated but `force_lo
 
       conn =
         conn
-        |> put_session(:oauth_token, token.token)
+        |> AuthHelper.put_session_token(token.token)
         |> get(
           "/oauth/authorize",
           %{
@@ -478,7 +480,7 @@ test "renders authentication page if user is already authenticated but user requ
 
       conn =
         conn
-        |> put_session(:oauth_token, token.token)
+        |> AuthHelper.put_session_token(token.token)
         |> get(
           "/oauth/authorize",
           %{
@@ -501,7 +503,7 @@ test "with existing authentication and non-OOB `redirect_uri`, redirects to app
 
       conn =
         conn
-        |> put_session(:oauth_token, token.token)
+        |> AuthHelper.put_session_token(token.token)
         |> get(
           "/oauth/authorize",
           %{
@@ -527,7 +529,7 @@ test "with existing authentication and unlisted non-OOB `redirect_uri`, redirect
 
       conn =
         conn
-        |> put_session(:oauth_token, token.token)
+        |> AuthHelper.put_session_token(token.token)
         |> get(
           "/oauth/authorize",
           %{
@@ -551,7 +553,7 @@ test "with existing authentication and OOB `redirect_uri`, redirects to app with
 
       conn =
         conn
-        |> put_session(:oauth_token, token.token)
+        |> AuthHelper.put_session_token(token.token)
         |> get(
           "/oauth/authorize",
           %{
@@ -609,6 +611,41 @@ test "redirects with oauth authorization, " <>
       end
     end
 
+    test "authorize from cookie" do
+      user = insert(:user)
+      app = insert(:oauth_app)
+      oauth_token = insert(:oauth_token, user: user, app: app)
+      redirect_uri = OAuthController.default_redirect_uri(app)
+
+      conn =
+        build_conn()
+        |> Plug.Session.call(Plug.Session.init(@session_opts))
+        |> fetch_session()
+        |> AuthHelper.put_session_token(oauth_token.token)
+        |> post(
+          "/oauth/authorize",
+          %{
+            "authorization" => %{
+              "name" => user.nickname,
+              "client_id" => app.client_id,
+              "redirect_uri" => redirect_uri,
+              "scope" => app.scopes,
+              "state" => "statepassed"
+            }
+          }
+        )
+
+      target = redirected_to(conn)
+      assert target =~ redirect_uri
+
+      query = URI.parse(target).query |> URI.query_decoder() |> Map.new()
+
+      assert %{"state" => "statepassed", "code" => code} = query
+      auth = Repo.get_by(Authorization, token: code)
+      assert auth
+      assert auth.scopes == app.scopes
+    end
+
     test "redirect to on two-factor auth page" do
       otp_secret = TOTP.generate_secret()
 
@@ -1219,8 +1256,43 @@ test "returns 500" do
     end
   end
 
-  describe "POST /oauth/revoke - bad request" do
-    test "returns 500" do
+  describe "POST /oauth/revoke" do
+    test "when authenticated with request token, revokes it and clears it from session" do
+      oauth_token = insert(:oauth_token)
+
+      conn =
+        build_conn()
+        |> Plug.Session.call(Plug.Session.init(@session_opts))
+        |> fetch_session()
+        |> AuthHelper.put_session_token(oauth_token.token)
+        |> post("/oauth/revoke", %{"token" => oauth_token.token})
+
+      assert json_response(conn, 200)
+
+      refute AuthHelper.get_session_token(conn)
+      assert Token.get_by_token(oauth_token.token) == {:error, :not_found}
+    end
+
+    test "if request is authenticated with a different token, " <>
+           "revokes requested token but keeps session token" do
+      user = insert(:user)
+      oauth_token = insert(:oauth_token, user: user)
+      other_app_oauth_token = insert(:oauth_token, user: user)
+
+      conn =
+        build_conn()
+        |> Plug.Session.call(Plug.Session.init(@session_opts))
+        |> fetch_session()
+        |> AuthHelper.put_session_token(oauth_token.token)
+        |> post("/oauth/revoke", %{"token" => other_app_oauth_token.token})
+
+      assert json_response(conn, 200)
+
+      assert AuthHelper.get_session_token(conn) == oauth_token.token
+      assert Token.get_by_token(other_app_oauth_token.token) == {:error, :not_found}
+    end
+
+    test "returns 500 on bad request" do
       response =
         build_conn()
         |> post("/oauth/revoke", %{})

test/pleroma/web/pleroma_api/controllers/chat_controller_test.exs

@@ -264,9 +264,10 @@ test "it returns the messages for a given chat", %{conn: conn, user: user} do
       assert length(result) == 3
 
       # Trying to get the chat of a different user
+      other_user_chat = Chat.get(other_user.id, user.ap_id)
+
       conn
-      |> assign(:user, other_user)
-      |> get("/api/v1/pleroma/chats/#{chat.id}/messages")
+      |> get("/api/v1/pleroma/chats/#{other_user_chat.id}/messages")
       |> json_response_and_validate_schema(404)
     end
   end

test/pleroma/web/plugs/admin_secret_authentication_plug_test.exs

@@ -49,6 +49,7 @@ test "with `admin_token` query parameter", %{conn: conn} do
         |> AdminSecretAuthenticationPlug.call(%{})
 
       assert conn.assigns[:user].is_admin
+      assert conn.assigns[:token] == nil
       assert PlugHelper.plug_skipped?(conn, OAuthScopesPlug)
     end
 
@@ -69,6 +70,7 @@ test "with `x-admin-token` HTTP header", %{conn: conn} do
         |> AdminSecretAuthenticationPlug.call(%{})
 
       assert conn.assigns[:user].is_admin
+      assert conn.assigns[:token] == nil
       assert PlugHelper.plug_skipped?(conn, OAuthScopesPlug)
     end
   end

test/pleroma/web/plugs/authentication_plug_test.exs

@@ -48,6 +48,7 @@ test "with a correct password in the credentials, " <>
       |> AuthenticationPlug.call(%{})
 
     assert conn.assigns.user == conn.assigns.auth_user
+    assert conn.assigns.token == nil
     assert PlugHelper.plug_skipped?(conn, OAuthScopesPlug)
   end
 
@@ -62,6 +63,7 @@ test "with a bcrypt hash, it updates to a pkbdf2 hash", %{conn: conn} do
       |> AuthenticationPlug.call(%{})
 
     assert conn.assigns.user.id == conn.assigns.auth_user.id
+    assert conn.assigns.token == nil
     assert PlugHelper.plug_skipped?(conn, OAuthScopesPlug)
 
     user = User.get_by_id(user.id)
@@ -83,6 +85,7 @@ test "with a crypt hash, it updates to a pkbdf2 hash", %{conn: conn} do
       |> AuthenticationPlug.call(%{})
 
     assert conn.assigns.user.id == conn.assigns.auth_user.id
+    assert conn.assigns.token == nil
     assert PlugHelper.plug_skipped?(conn, OAuthScopesPlug)
 
     user = User.get_by_id(user.id)

test/pleroma/web/plugs/ensure_user_key_plug_test.exs

@@ -1,29 +0,0 @@
-# Pleroma: A lightweight social networking server
-# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
-# SPDX-License-Identifier: AGPL-3.0-only
-
-defmodule Pleroma.Web.Plugs.EnsureUserKeyPlugTest do
-  use Pleroma.Web.ConnCase, async: true
-
-  alias Pleroma.Web.Plugs.EnsureUserKeyPlug
-
-  test "if the conn has a user key set, it does nothing", %{conn: conn} do
-    conn =
-      conn
-      |> assign(:user, 1)
-
-    ret_conn =
-      conn
-      |> EnsureUserKeyPlug.call(%{})
-
-    assert conn == ret_conn
-  end
-
-  test "if the conn has no key set, it sets it to nil", %{conn: conn} do
-    conn =
-      conn
-      |> EnsureUserKeyPlug.call(%{})
-
-    assert Map.has_key?(conn.assigns, :user)
-  end
-end

test/pleroma/web/plugs/ensure_user_token_assigns_plug_test.exs

@@ -0,0 +1,69 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.Plugs.EnsureUserTokenAssignsPlugTest do
+  use Pleroma.Web.ConnCase, async: true
+
+  import Pleroma.Factory
+
+  alias Pleroma.Web.Plugs.EnsureUserTokenAssignsPlug
+
+  test "with :user assign set to a User record " <>
+         "and :token assign set to a Token belonging to this user, " <>
+         "it does nothing" do
+    %{conn: conn} = oauth_access(["read"])
+
+    ret_conn = EnsureUserTokenAssignsPlug.call(conn, %{})
+
+    assert conn == ret_conn
+  end
+
+  test "with :user assign set to a User record " <>
+         "but :token assign not set or not a Token, " <>
+         "it assigns :token to `nil`",
+       %{conn: conn} do
+    user = insert(:user)
+    conn = assign(conn, :user, user)
+
+    ret_conn = EnsureUserTokenAssignsPlug.call(conn, %{})
+
+    assert %{token: nil} = ret_conn.assigns
+
+    ret_conn2 =
+      conn
+      |> assign(:token, 1)
+      |> EnsureUserTokenAssignsPlug.call(%{})
+
+    assert %{token: nil} = ret_conn2.assigns
+  end
+
+  # Abnormal (unexpected) scenario
+  test "with :user assign set to a User record " <>
+         "but :token assign set to a Token NOT belonging to :user, " <>
+         "it drops auth info" do
+    %{conn: conn} = oauth_access(["read"])
+    other_user = insert(:user)
+
+    conn = assign(conn, :user, other_user)
+
+    ret_conn = EnsureUserTokenAssignsPlug.call(conn, %{})
+
+    assert %{user: nil, token: nil} = ret_conn.assigns
+  end
+
+  test "if :user assign is not set to a User record, it sets :user and :token to nil", %{
+    conn: conn
+  } do
+    ret_conn = EnsureUserTokenAssignsPlug.call(conn, %{})
+
+    assert %{user: nil, token: nil} = ret_conn.assigns
+
+    ret_conn2 =
+      conn
+      |> assign(:user, 1)
+      |> EnsureUserTokenAssignsPlug.call(%{})
+
+    assert %{user: nil, token: nil} = ret_conn2.assigns
+  end
+end

test/pleroma/web/plugs/legacy_authentication_plug_test.exs

@@ -1,82 +0,0 @@
-# Pleroma: A lightweight social networking server
-# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
-# SPDX-License-Identifier: AGPL-3.0-only
-
-defmodule Pleroma.Web.Plugs.LegacyAuthenticationPlugTest do
-  use Pleroma.Web.ConnCase
-
-  import Pleroma.Factory
-
-  alias Pleroma.User
-  alias Pleroma.Web.Plugs.LegacyAuthenticationPlug
-  alias Pleroma.Web.Plugs.OAuthScopesPlug
-  alias Pleroma.Web.Plugs.PlugHelper
-
-  setup do
-    user =
-      insert(:user,
-        password: "password",
-        password_hash:
-          "$6$9psBWV8gxkGOZWBz$PmfCycChoxeJ3GgGzwvhlgacb9mUoZ.KUXNCssekER4SJ7bOK53uXrHNb2e4i8yPFgSKyzaW9CcmrDXWIEMtD1"
-      )
-
-    %{user: user}
-  end
-
-  test "it does nothing if a user is assigned", %{conn: conn, user: user} do
-    conn =
-      conn
-      |> assign(:auth_credentials, %{username: "dude", password: "password"})
-      |> assign(:auth_user, user)
-      |> assign(:user, %User{})
-
-    ret_conn =
-      conn
-      |> LegacyAuthenticationPlug.call(%{})
-
-    assert ret_conn == conn
-  end
-
-  @tag :skip_on_mac
-  test "if `auth_user` is present and password is correct, " <>
-         "it authenticates the user, resets the password, marks OAuthScopesPlug as skipped",
-       %{
-         conn: conn,
-         user: user
-       } do
-    conn =
-      conn
-      |> assign(:auth_credentials, %{username: "dude", password: "password"})
-      |> assign(:auth_user, user)
-
-    conn = LegacyAuthenticationPlug.call(conn, %{})
-
-    assert conn.assigns.user.id == user.id
-    assert PlugHelper.plug_skipped?(conn, OAuthScopesPlug)
-  end
-
-  @tag :skip_on_mac
-  test "it does nothing if the password is wrong", %{
-    conn: conn,
-    user: user
-  } do
-    conn =
-      conn
-      |> assign(:auth_credentials, %{username: "dude", password: "wrong_password"})
-      |> assign(:auth_user, user)
-
-    ret_conn =
-      conn
-      |> LegacyAuthenticationPlug.call(%{})
-
-    assert conn == ret_conn
-  end
-
-  test "with no credentials or user it does nothing", %{conn: conn} do
-    ret_conn =
-      conn
-      |> LegacyAuthenticationPlug.call(%{})
-
-    assert ret_conn == conn
-  end
-end

test/pleroma/web/plugs/o_auth_plug_test.exs

@@ -5,34 +5,40 @@
 defmodule Pleroma.Web.Plugs.OAuthPlugTest do
   use Pleroma.Web.ConnCase, async: true
 
+  alias Pleroma.Helpers.AuthHelper
+  alias Pleroma.Web.OAuth.Token
+  alias Pleroma.Web.OAuth.Token.Strategy.Revoke
   alias Pleroma.Web.Plugs.OAuthPlug
-  import Pleroma.Factory
+  alias Plug.Session
 
-  @session_opts [
-    store: :cookie,
-    key: "_test",
-    signing_salt: "cooldude"
-  ]
+  import Pleroma.Factory
 
   setup %{conn: conn} do
     user = insert(:user)
-    {:ok, %{token: token}} = Pleroma.Web.OAuth.Token.create(insert(:oauth_app), user)
-    %{user: user, token: token, conn: conn}
+    {:ok, oauth_token} = Token.create(insert(:oauth_app), user)
+    %{user: user, token: oauth_token, conn: conn}
   end
 
-  test "with valid token(uppercase), it assigns the user", %{conn: conn} = opts do
+  test "it does nothing if a user is assigned", %{conn: conn} do
+    conn = assign(conn, :user, %Pleroma.User{})
+    ret_conn = OAuthPlug.call(conn, %{})
+
+    assert ret_conn == conn
+  end
+
+  test "with valid token (uppercase) in auth header, it assigns the user", %{conn: conn} = opts do
     conn =
       conn
-      |> put_req_header("authorization", "BEARER #{opts[:token]}")
+      |> put_req_header("authorization", "BEARER #{opts[:token].token}")
       |> OAuthPlug.call(%{})
 
     assert conn.assigns[:user] == opts[:user]
   end
 
-  test "with valid token(downcase), it assigns the user", %{conn: conn} = opts do
+  test "with valid token (downcase) in auth header, it assigns the user", %{conn: conn} = opts do
     conn =
       conn
-      |> put_req_header("authorization", "bearer #{opts[:token]}")
+      |> put_req_header("authorization", "bearer #{opts[:token].token}")
       |> OAuthPlug.call(%{})
 
     assert conn.assigns[:user] == opts[:user]
@@ -41,7 +47,7 @@ test "with valid token(downcase), it assigns the user", %{conn: conn} = opts do
   test "with valid token (downcase) in url parameters, it assigns the user", opts do
     conn =
       :get
-      |> build_conn("/?access_token=#{opts[:token]}")
+      |> build_conn("/?access_token=#{opts[:token].token}")
       |> put_req_header("content-type", "application/json")
       |> fetch_query_params()
       |> OAuthPlug.call(%{})
@@ -52,13 +58,13 @@ test "with valid token(downcase) in url parameters, it assigns the user", opts d
   test "with valid token (downcase) in body parameters, it assigns the user", opts do
     conn =
       :post
-      |> build_conn("/api/v1/statuses", access_token: opts[:token], status: "test")
+      |> build_conn("/api/v1/statuses", access_token: opts[:token].token, status: "test")
       |> OAuthPlug.call(%{})
 
     assert conn.assigns[:user] == opts[:user]
   end
 
-  test "with invalid token, it not assigns the user", %{conn: conn} do
+  test "with invalid token, it does not assign the user", %{conn: conn} do
     conn =
       conn
       |> put_req_header("authorization", "bearer TTTTT")
@@ -67,14 +73,56 @@ test "with invalid token, it not assigns the user", %{conn: conn} do
     refute conn.assigns[:user]
   end
 
-  test "when token is missed but token in session, it assigns the user", %{conn: conn} = opts do
+  describe "with :oauth_token in session, " do
+    setup %{token: oauth_token, conn: conn} do
+      session_opts = [
+        store: :cookie,
+        key: "_test",
+        signing_salt: "cooldude"
+      ]
+
       conn =
         conn
-      |> Plug.Session.call(Plug.Session.init(@session_opts))
+        |> Session.call(Session.init(session_opts))
         |> fetch_session()
-      |> put_session(:oauth_token, opts[:token])
-      |> OAuthPlug.call(%{})
+        |> AuthHelper.put_session_token(oauth_token.token)
 
-    assert conn.assigns[:user] == opts[:user]
+      %{conn: conn}
+    end
+
+    test "if session-stored token matches a valid OAuth token, assigns :user and :token", %{
+      conn: conn,
+      user: user,
+      token: oauth_token
+    } do
+      conn = OAuthPlug.call(conn, %{})
+
+      assert conn.assigns.user && conn.assigns.user.id == user.id
+      assert conn.assigns.token && conn.assigns.token.id == oauth_token.id
+    end
+
+    test "if session-stored token matches an expired OAuth token, does nothing", %{
+      conn: conn,
+      token: oauth_token
+    } do
+      expired_valid_until = NaiveDateTime.add(NaiveDateTime.utc_now(), -3600 * 24, :second)
+
+      oauth_token
+      |> Ecto.Changeset.change(valid_until: expired_valid_until)
+      |> Pleroma.Repo.update()
+
+      ret_conn = OAuthPlug.call(conn, %{})
+      assert ret_conn == conn
+    end
+
+    test "if session-stored token matches a revoked OAuth token, does nothing", %{
+      conn: conn,
+      token: oauth_token
+    } do
+      Revoke.revoke(oauth_token)
+
+      ret_conn = OAuthPlug.call(conn, %{})
+      assert ret_conn == conn
+    end
   end
 end

test/pleroma/web/plugs/session_authentication_plug_test.exs

@@ -1,63 +0,0 @@
-# Pleroma: A lightweight social networking server
-# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
-# SPDX-License-Identifier: AGPL-3.0-only
-
-defmodule Pleroma.Web.Plugs.SessionAuthenticationPlugTest do
-  use Pleroma.Web.ConnCase, async: true
-
-  alias Pleroma.User
-  alias Pleroma.Web.Plugs.SessionAuthenticationPlug
-
-  setup %{conn: conn} do
-    session_opts = [
-      store: :cookie,
-      key: "_test",
-      signing_salt: "cooldude"
-    ]
-
-    conn =
-      conn
-      |> Plug.Session.call(Plug.Session.init(session_opts))
-      |> fetch_session
-      |> assign(:auth_user, %User{id: 1})
-
-    %{conn: conn}
-  end
-
-  test "it does nothing if a user is assigned", %{conn: conn} do
-    conn =
-      conn
-      |> assign(:user, %User{})
-
-    ret_conn =
-      conn
-      |> SessionAuthenticationPlug.call(%{})
-
-    assert ret_conn == conn
-  end
-
-  test "if the auth_user has the same id as the user_id in the session, it assigns the user", %{
-    conn: conn
-  } do
-    conn =
-      conn
-      |> put_session(:user_id, conn.assigns.auth_user.id)
-      |> SessionAuthenticationPlug.call(%{})
-
-    assert conn.assigns.user == conn.assigns.auth_user
-  end
-
-  test "if the auth_user has a different id as the user_id in the session, it does nothing", %{
-    conn: conn
-  } do
-    conn =
-      conn
-      |> put_session(:user_id, -1)
-
-    ret_conn =
-      conn
-      |> SessionAuthenticationPlug.call(%{})
-
-    assert ret_conn == conn
-  end
-end

test/pleroma/web/plugs/set_user_session_id_plug_test.exs

@@ -5,7 +5,7 @@
 defmodule Pleroma.Web.Plugs.SetUserSessionIdPlugTest do
   use Pleroma.Web.ConnCase, async: true
 
-  alias Pleroma.User
+  alias Pleroma.Helpers.AuthHelper
   alias Pleroma.Web.Plugs.SetUserSessionIdPlug
 
   setup %{conn: conn} do
@@ -18,28 +18,26 @@ defmodule Pleroma.Web.Plugs.SetUserSessionIdPlugTest do
     conn =
       conn
       |> Plug.Session.call(Plug.Session.init(session_opts))
-      |> fetch_session
+      |> fetch_session()
 
     %{conn: conn}
   end
 
   test "doesn't do anything if the user isn't set", %{conn: conn} do
-    ret_conn =
-      conn
-      |> SetUserSessionIdPlug.call(%{})
+    ret_conn = SetUserSessionIdPlug.call(conn, %{})
 
     assert ret_conn == conn
   end
 
-  test "sets the user_id in the session to the user id of the user assign", %{conn: conn} do
-    Code.ensure_compiled(Pleroma.User)
+  test "sets session token basing on :token assign", %{conn: conn} do
+    %{user: user, token: oauth_token} = oauth_access(["read"])
 
-    conn =
+    ret_conn =
       conn
-      |> assign(:user, %User{id: 1})
+      |> assign(:user, user)
+      |> assign(:token, oauth_token)
       |> SetUserSessionIdPlug.call(%{})
 
-    id = get_session(conn, :user_id)
-    assert id == 1
+    assert AuthHelper.get_session_token(ret_conn) == oauth_token.token
   end
 end