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Merge branch '1427-oauth-admin-scopes' into 'develop'

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[#1427] OAuth admin scopes

Closes #1427

See merge request pleroma/pleroma!2025
This commit is contained in:
lain 2019-12-10 13:44:06 +00:00
commit aac0187ec1
15 changed files with 289 additions and 63 deletions
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1
CHANGELOG.md
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@ -51,6 +51,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
- MRF: New module which handles incoming posts based on their age. By default, all incoming posts that are older than 2 days will be unlisted and not shown to their followers.
- User notification settings: Add `privacy_option` option.
- User settings: Add _This account is a_ option.
- OAuth: admin scopes support (relevant setting: `[:auth, :enforce_oauth_admin_scope_usage]`).
<details>
<summary>API Changes</summary>

5
config/config.exs
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@ -563,7 +563,10 @@ config :ueberauth,
base_path: "/oauth",
providers: ueberauth_providers
config :pleroma, :auth, oauth_consumer_strategies: oauth_consumer_strategies
config :pleroma,
:auth,
enforce_oauth_admin_scope_usage: false,
oauth_consumer_strategies: oauth_consumer_strategies
config :pleroma, Pleroma.Emails.Mailer, adapter: Swoosh.Adapters.Sendmail, enabled: false

9
config/description.exs
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@ -2094,6 +2094,15 @@ config :pleroma, :config_description, [
type: :group,
description: "Authentication / authorization settings",
children: [
%{
key: :enforce_oauth_admin_scope_usage,
type: :boolean,
description:
"OAuth admin scope requirement toggle. " <>
"If `true`, admin actions explicitly demand admin OAuth scope(s) presence in OAuth token " <>
"(client app must support admin scopes). If `false` and token doesn't have admin scope(s)," <>
"`is_admin` user flag grants access to admin-specific actions."
},
%{
key: :auth_template,
type: :string,

7
docs/API/admin_api.md
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@ -2,6 +2,13 @@
Authentication is required and the user must be an admin.
Configuration options:
* `[:auth, :enforce_oauth_admin_scope_usage]` — OAuth admin scope requirement toggle.
If `true`, admin actions explicitly demand admin OAuth scope(s) presence in OAuth token (client app must support admin scopes).
If `false` and token doesn't have admin scope(s), `is_admin` user flag grants access to admin-specific actions.
Note that client app needs to explicitly support admin scopes and request them when obtaining auth token.
## `GET /api/pleroma/admin/users`
### List users

9
lib/mix/tasks/pleroma/user.ex
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@ -8,7 +8,6 @@ defmodule Mix.Tasks.Pleroma.User do
alias Ecto.Changeset
alias Pleroma.User
alias Pleroma.UserInviteToken
alias Pleroma.Web.OAuth
@shortdoc "Manages Pleroma users"
@moduledoc File.read!("docs/administration/CLI_tasks/user.md")
@ -354,8 +353,7 @@ defmodule Mix.Tasks.Pleroma.User do
start_pleroma()
with %User{local: true} = user <- User.get_cached_by_nickname(nickname) do
OAuth.Token.delete_user_tokens(user)
OAuth.Authorization.delete_user_authorizations(user)
User.global_sign_out(user)
shell_info("#{nickname} signed out from all apps.")
else
@ -393,10 +391,7 @@ defmodule Mix.Tasks.Pleroma.User do
end
defp set_admin(user, value) do
{:ok, user} =
user
|> Changeset.change(%{is_admin: value})
|> User.update_and_set_cache()
{:ok, user} = User.admin_api_update(user, %{is_admin: value})
shell_info("Admin status of #{user.nickname}: #{user.is_admin}")
user

7
lib/pleroma/config.ex
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@ -65,4 +65,11 @@ defmodule Pleroma.Config do
def oauth_consumer_strategies, do: get([:auth, :oauth_consumer_strategies], [])
def oauth_consumer_enabled?, do: oauth_consumer_strategies() != []
def enforce_oauth_admin_scope_usage?, do: !!get([:auth, :enforce_oauth_admin_scope_usage])
def oauth_admin_scopes(scope) do
["admin:#{scope}"] ++
if enforce_oauth_admin_scope_usage?(), do: [], else: [scope]
end
end

9
lib/pleroma/plugs/oauth_scopes_plug.ex
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@ -6,6 +6,7 @@ defmodule Pleroma.Plugs.OAuthScopesPlug do
import Plug.Conn
import Pleroma.Web.Gettext
alias Pleroma.Config
alias Pleroma.Plugs.EnsurePublicOrAuthenticatedPlug
@behaviour Plug
@ -15,6 +16,14 @@ defmodule Pleroma.Plugs.OAuthScopesPlug do
def call(%Plug.Conn{assigns: assigns} = conn, %{scopes: scopes} = options) do
op = options[:op] || :|
token = assigns[:token]
scopes =
if options[:admin] do
Config.oauth_admin_scopes(scopes)
else
scopes
end
matched_scopes = token && filter_descendants(scopes, token.scopes)
cond do

25
lib/pleroma/plugs/user_is_admin_plug.ex
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@ -5,19 +5,38 @@
defmodule Pleroma.Plugs.UserIsAdminPlug do
import Pleroma.Web.TranslationHelpers
import Plug.Conn
alias Pleroma.User
alias Pleroma.Web.OAuth
def init(options) do
options
end
def call(%{assigns: %{user: %User{is_admin: true}}} = conn, _) do
def call(%{assigns: %{user: %User{is_admin: true}} = assigns} = conn, _) do
token = assigns[:token]
cond do
not Pleroma.Config.enforce_oauth_admin_scope_usage?() ->
conn
token && OAuth.Scopes.contains_admin_scopes?(token.scopes) ->
# Note: checking for _any_ admin scope presence, not necessarily fitting requested action.
# Thus, controller must explicitly invoke OAuthScopesPlug to verify scope requirements.
conn
true ->
fail(conn)
end
end
def call(conn, _) do
fail(conn)
end
defp fail(conn) do
conn
|> render_error(:forbidden, "User is not admin.")
|> halt
|> render_error(:forbidden, "User is not an admin or OAuth admin scope is not granted.")
|> halt()
end
end

21
lib/pleroma/user.ex
View File

@ -1839,13 +1839,28 @@ defmodule Pleroma.User do
end
def admin_api_update(user, params) do
user
|> cast(params, [
changeset =
cast(user, params, [
:is_moderator,
:is_admin,
:show_role
])
|> update_and_set_cache()
with {:ok, updated_user} <- update_and_set_cache(changeset) do
if user.is_admin && !updated_user.is_admin do
# Tokens & authorizations containing any admin scopes must be revoked (revoking all).
# This is an extra safety measure (tokens' admin scopes won't be accepted for non-admins).
global_sign_out(user)
end
{:ok, updated_user}
end
end
@doc "Signs user out of all applications"
def global_sign_out(user) do
OAuth.Authorization.delete_user_authorizations(user)
OAuth.Token.delete_user_tokens(user)
end
def mascot_update(user, url) do

18
lib/pleroma/web/admin_api/admin_api_controller.ex
View File

@ -30,13 +30,13 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIController do
plug(
OAuthScopesPlug,
%{scopes: ["read:accounts"]}
%{scopes: ["read:accounts"], admin: true}
when action in [:list_users, :user_show, :right_get, :invites]
)
plug(
OAuthScopesPlug,
%{scopes: ["write:accounts"]}
%{scopes: ["write:accounts"], admin: true}
when action in [
:get_invite_token,
:revoke_invite,
@ -58,35 +58,37 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIController do
plug(
OAuthScopesPlug,
%{scopes: ["read:reports"]} when action in [:list_reports, :report_show]
%{scopes: ["read:reports"], admin: true}
when action in [:list_reports, :report_show]
)
plug(
OAuthScopesPlug,
%{scopes: ["write:reports"]}
%{scopes: ["write:reports"], admin: true}
when action in [:report_update_state, :report_respond]
)
plug(
OAuthScopesPlug,
%{scopes: ["read:statuses"]} when action == :list_user_statuses
%{scopes: ["read:statuses"], admin: true}
when action == :list_user_statuses
)
plug(
OAuthScopesPlug,
%{scopes: ["write:statuses"]}
%{scopes: ["write:statuses"], admin: true}
when action in [:status_update, :status_delete]
)
plug(
OAuthScopesPlug,
%{scopes: ["read"]}
%{scopes: ["read"], admin: true}
when action in [:config_show, :migrate_to_db, :migrate_from_db, :list_log]
)
plug(
OAuthScopesPlug,
%{scopes: ["write"]}
%{scopes: ["write"], admin: true}
when action in [:relay_follow, :relay_unfollow, :config_update]
)

10
lib/pleroma/web/oauth/oauth_controller.ex
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@ -222,7 +222,7 @@ defmodule Pleroma.Web.OAuth.OAuthController do
{:user_active, true} <- {:user_active, !user.deactivated},
{:password_reset_pending, false} <-
{:password_reset_pending, user.password_reset_pending},
{:ok, scopes} <- validate_scopes(app, params),
{:ok, scopes} <- validate_scopes(app, params, user),
{:ok, auth} <- Authorization.create_authorization(app, user, scopes),
{:ok, token} <- Token.exchange_token(app, auth) do
json(conn, Token.Response.build(user, token))
@ -471,7 +471,7 @@ defmodule Pleroma.Web.OAuth.OAuthController do
{:get_user, (user && {:ok, user}) || Authenticator.get_user(conn)},
%App{} = app <- Repo.get_by(App, client_id: client_id),
true <- redirect_uri in String.split(app.redirect_uris),
{:ok, scopes} <- validate_scopes(app, auth_attrs),
{:ok, scopes} <- validate_scopes(app, auth_attrs, user),
{:auth_active, true} <- {:auth_active, User.auth_active?(user)} do
Authorization.create_authorization(app, user, scopes)
end
@ -487,12 +487,12 @@ defmodule Pleroma.Web.OAuth.OAuthController do
defp put_session_registration_id(%Plug.Conn{} = conn, registration_id),
do: put_session(conn, :registration_id, registration_id)
@spec validate_scopes(App.t(), map()) ::
@spec validate_scopes(App.t(), map(), User.t()) ::
{:ok, list()} | {:error, :missing_scopes | :unsupported_scopes}
defp validate_scopes(app, params) do
defp validate_scopes(%App{} = app, params, %User{} = user) do
params
|> Scopes.fetch_scopes(app.scopes)
|> Scopes.validate(app.scopes)
|> Scopes.validate(app.scopes, user)
end
def default_redirect_uri(%App{} = app) do

34
lib/pleroma/web/oauth/scopes.ex
View File

@ -7,6 +7,9 @@ defmodule Pleroma.Web.OAuth.Scopes do
Functions for dealing with scopes.
"""
alias Pleroma.Plugs.OAuthScopesPlug
alias Pleroma.User
@doc """
Fetch scopes from request params.
@ -53,15 +56,36 @@ defmodule Pleroma.Web.OAuth.Scopes do
@doc """
Validates scopes.
"""
@spec validate(list() | nil, list()) ::
@spec validate(list() | nil, list(), User.t()) ::
{:ok, list()} | {:error, :missing_scopes | :unsupported_scopes}
def validate([], _app_scopes), do: {:error, :missing_scopes}
def validate(nil, _app_scopes), do: {:error, :missing_scopes}
def validate(blank_scopes, _app_scopes, _user) when blank_scopes in [nil, []],
do: {:error, :missing_scopes}
def validate(scopes, app_scopes) do
case Pleroma.Plugs.OAuthScopesPlug.filter_descendants(scopes, app_scopes) do
def validate(scopes, app_scopes, %User{} = user) do
with {:ok, _} <- ensure_scopes_support(scopes, app_scopes),
{:ok, scopes} <- authorize_admin_scopes(scopes, app_scopes, user) do
{:ok, scopes}
end
end
defp ensure_scopes_support(scopes, app_scopes) do
case OAuthScopesPlug.filter_descendants(scopes, app_scopes) do
^scopes -> {:ok, scopes}
_ -> {:error, :unsupported_scopes}
end
end
defp authorize_admin_scopes(scopes, app_scopes, %User{} = user) do
if user.is_admin || !contains_admin_scopes?(scopes) || !contains_admin_scopes?(app_scopes) do
{:ok, scopes}
else
{:error, :unsupported_scopes}
end
end
def contains_admin_scopes?(scopes) do
scopes
|> OAuthScopesPlug.filter_descendants(["admin"])
|> Enum.any?()
end
end

2
lib/pleroma/web/pleroma_api/controllers/emoji_api_controller.ex
View File

@ -7,7 +7,7 @@ defmodule Pleroma.Web.PleromaAPI.EmojiAPIController do
plug(
OAuthScopesPlug,
%{scopes: ["write"]}
%{scopes: ["write"], admin: true}
when action in [
:create,
:delete,

98
test/plugs/user_is_admin_plug_test.exs
View File

@ -8,21 +8,22 @@ defmodule Pleroma.Plugs.UserIsAdminPlugTest do
alias Pleroma.Plugs.UserIsAdminPlug
import Pleroma.Factory
test "accepts a user that is admin" do
describe "unless [:auth, :enforce_oauth_admin_scope_usage]," do
clear_config([:auth, :enforce_oauth_admin_scope_usage]) do
Pleroma.Config.put([:auth, :enforce_oauth_admin_scope_usage], false)
end
test "accepts a user that is an admin" do
user = insert(:user, is_admin: true)
conn =
build_conn()
|> assign(:user, user)
conn = assign(build_conn(), :user, user)
ret_conn =
conn
|> UserIsAdminPlug.call(%{})
ret_conn = UserIsAdminPlug.call(conn, %{})
assert conn == ret_conn
end
test "denies a user that isn't admin" do
test "denies a user that isn't an admin" do
user = insert(:user)
conn =
@ -34,10 +35,89 @@ defmodule Pleroma.Plugs.UserIsAdminPlugTest do
end
test "denies when a user isn't set" do
conn = UserIsAdminPlug.call(build_conn(), %{})
assert conn.status == 403
end
end
describe "with [:auth, :enforce_oauth_admin_scope_usage]," do
clear_config([:auth, :enforce_oauth_admin_scope_usage]) do
Pleroma.Config.put([:auth, :enforce_oauth_admin_scope_usage], true)
end
setup do
admin_user = insert(:user, is_admin: true)
non_admin_user = insert(:user, is_admin: false)
blank_user = nil
{:ok, %{users: [admin_user, non_admin_user, blank_user]}}
end
test "if token has any of admin scopes, accepts a user that is an admin", %{conn: conn} do
user = insert(:user, is_admin: true)
token = insert(:oauth_token, user: user, scopes: ["admin:something"])
conn =
build_conn()
conn
|> assign(:user, user)
|> assign(:token, token)
ret_conn = UserIsAdminPlug.call(conn, %{})
assert conn == ret_conn
end
test "if token has any of admin scopes, denies a user that isn't an admin", %{conn: conn} do
user = insert(:user, is_admin: false)
token = insert(:oauth_token, user: user, scopes: ["admin:something"])
conn =
conn
|> assign(:user, user)
|> assign(:token, token)
|> UserIsAdminPlug.call(%{})
assert conn.status == 403
end
test "if token has any of admin scopes, denies when a user isn't set", %{conn: conn} do
token = insert(:oauth_token, scopes: ["admin:something"])
conn =
conn
|> assign(:user, nil)
|> assign(:token, token)
|> UserIsAdminPlug.call(%{})
assert conn.status == 403
end
test "if token lacks admin scopes, denies users regardless of is_admin flag",
%{users: users} do
for user <- users do
token = insert(:oauth_token, user: user)
conn =
build_conn()
|> assign(:user, user)
|> assign(:token, token)
|> UserIsAdminPlug.call(%{})
assert conn.status == 403
end
end
test "if token is missing, denies users regardless of is_admin flag", %{users: users} do
for user <- users do
conn =
build_conn()
|> assign(:user, user)
|> assign(:token, nil)
|> UserIsAdminPlug.call(%{})
assert conn.status == 403
end
end
end
end

61
test/web/admin_api/admin_api_controller_test.exs
View File

@ -25,6 +25,60 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIControllerTest do
:ok
end
clear_config([:auth, :enforce_oauth_admin_scope_usage]) do
Pleroma.Config.put([:auth, :enforce_oauth_admin_scope_usage], false)
end
describe "with [:auth, :enforce_oauth_admin_scope_usage]," do
clear_config([:auth, :enforce_oauth_admin_scope_usage]) do
Pleroma.Config.put([:auth, :enforce_oauth_admin_scope_usage], true)
end
test "GET /api/pleroma/admin/users/:nickname requires admin:read:accounts or broader scope" do
user = insert(:user)
admin = insert(:user, is_admin: true)
url = "/api/pleroma/admin/users/#{user.nickname}"
good_token1 = insert(:oauth_token, user: admin, scopes: ["admin"])
good_token2 = insert(:oauth_token, user: admin, scopes: ["admin:read"])
good_token3 = insert(:oauth_token, user: admin, scopes: ["admin:read:accounts"])
bad_token1 = insert(:oauth_token, user: admin, scopes: ["read:accounts"])
bad_token2 = insert(:oauth_token, user: admin, scopes: ["admin:read:accounts:partial"])
bad_token3 = nil
for good_token <- [good_token1, good_token2, good_token3] do
conn =
build_conn()
|> assign(:user, admin)
|> assign(:token, good_token)
|> get(url)
assert json_response(conn, 200)
end
for good_token <- [good_token1, good_token2, good_token3] do
conn =
build_conn()
|> assign(:user, nil)
|> assign(:token, good_token)
|> get(url)
assert json_response(conn, :forbidden)
end
for bad_token <- [bad_token1, bad_token2, bad_token3] do
conn =
build_conn()
|> assign(:user, admin)
|> assign(:token, bad_token)
|> get(url)
assert json_response(conn, :forbidden)
end
end
end
describe "DELETE /api/pleroma/admin/users" do
test "single user" do
admin = insert(:user, is_admin: true)
@ -98,7 +152,7 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIControllerTest do
assert ["lain", "lain2"] -- Enum.map(log_entry.data["subjects"], & &1["nickname"]) == []
end
test "Cannot create user with exisiting email" do
test "Cannot create user with existing email" do
admin = insert(:user, is_admin: true)
user = insert(:user)
@ -129,7 +183,7 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIControllerTest do
]
end
test "Cannot create user with exisiting nickname" do
test "Cannot create user with existing nickname" do
admin = insert(:user, is_admin: true)
user = insert(:user)
@ -1560,7 +1614,8 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIControllerTest do
|> assign(:user, user)
|> get("/api/pleroma/admin/reports")
assert json_response(conn, :forbidden) == %{"error" => "User is not admin."}
assert json_response(conn, :forbidden) ==
%{"error" => "User is not an admin or OAuth admin scope is not granted."}
end
test "returns 403 when requested by anonymous" do