forked from AkkomaGang/akkoma
272 lines
8.3 KiB
Elixir
272 lines
8.3 KiB
Elixir
# Pleroma: A lightweight social networking server
|
|
# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
|
|
# SPDX-License-Identifier: AGPL-3.0-only
|
|
|
|
defmodule Pleroma.Web.OAuth.OAuthController do
|
|
use Pleroma.Web, :controller
|
|
|
|
alias Pleroma.Repo
|
|
alias Pleroma.User
|
|
alias Pleroma.Web.Auth.Authenticator
|
|
alias Pleroma.Web.OAuth.App
|
|
alias Pleroma.Web.OAuth.Authorization
|
|
alias Pleroma.Web.OAuth.Token
|
|
|
|
import Pleroma.Web.ControllerHelper, only: [oauth_scopes: 2]
|
|
|
|
if Pleroma.Config.get([:auth, :oauth_consumer_enabled]), do: plug(Ueberauth)
|
|
|
|
plug(:fetch_session)
|
|
plug(:fetch_flash)
|
|
|
|
action_fallback(Pleroma.Web.OAuth.FallbackController)
|
|
|
|
def request(conn, params) do
|
|
message =
|
|
if params["provider"] do
|
|
"Unsupported OAuth provider: #{params["provider"]}."
|
|
else
|
|
"Bad OAuth request."
|
|
end
|
|
|
|
conn
|
|
|> put_flash(:error, message)
|
|
|> redirect(to: "/")
|
|
end
|
|
|
|
def callback(%{assigns: %{ueberauth_failure: failure}} = conn, %{"redirect_uri" => redirect_uri}) do
|
|
messages = for e <- Map.get(failure, :errors, []), do: e.message
|
|
message = Enum.join(messages, "; ")
|
|
|
|
conn
|
|
|> put_flash(:error, "Failed to authenticate: #{message}.")
|
|
|> redirect(external: redirect_uri(conn, redirect_uri))
|
|
end
|
|
|
|
def callback(
|
|
conn,
|
|
%{"client_id" => client_id, "redirect_uri" => redirect_uri} = params
|
|
) do
|
|
with {:ok, user} <- Authenticator.get_or_create_user_by_oauth(conn, params) do
|
|
do_create_authorization(
|
|
conn,
|
|
%{
|
|
"authorization" => %{
|
|
"client_id" => client_id,
|
|
"redirect_uri" => redirect_uri,
|
|
"scope" => oauth_scopes(params, nil)
|
|
}
|
|
},
|
|
user
|
|
)
|
|
else
|
|
_ ->
|
|
conn
|
|
|> put_flash(:error, "Failed to set up user account.")
|
|
|> redirect(external: redirect_uri(conn, redirect_uri))
|
|
end
|
|
end
|
|
|
|
def authorize(conn, params) do
|
|
app = Repo.get_by(App, client_id: params["client_id"])
|
|
available_scopes = (app && app.scopes) || []
|
|
scopes = oauth_scopes(params, nil) || available_scopes
|
|
|
|
render(conn, Authenticator.auth_template(), %{
|
|
response_type: params["response_type"],
|
|
client_id: params["client_id"],
|
|
available_scopes: available_scopes,
|
|
scopes: scopes,
|
|
redirect_uri: params["redirect_uri"],
|
|
state: params["state"],
|
|
params: params
|
|
})
|
|
end
|
|
|
|
def create_authorization(conn, params), do: do_create_authorization(conn, params, nil)
|
|
|
|
defp do_create_authorization(
|
|
conn,
|
|
%{
|
|
"authorization" =>
|
|
%{
|
|
"client_id" => client_id,
|
|
"redirect_uri" => redirect_uri
|
|
} = auth_params
|
|
} = params,
|
|
user
|
|
) do
|
|
with {_, {:ok, %User{} = user}} <-
|
|
{:get_user, (user && {:ok, user}) || Authenticator.get_user(conn, params)},
|
|
%App{} = app <- Repo.get_by(App, client_id: client_id),
|
|
true <- redirect_uri in String.split(app.redirect_uris),
|
|
scopes <- oauth_scopes(auth_params, []),
|
|
{:unsupported_scopes, []} <- {:unsupported_scopes, scopes -- app.scopes},
|
|
# Note: `scope` param is intentionally not optional in this context
|
|
{:missing_scopes, false} <- {:missing_scopes, scopes == []},
|
|
{:auth_active, true} <- {:auth_active, User.auth_active?(user)},
|
|
{:ok, auth} <- Authorization.create_authorization(app, user, scopes) do
|
|
redirect_uri = redirect_uri(conn, redirect_uri)
|
|
|
|
cond do
|
|
redirect_uri == "urn:ietf:wg:oauth:2.0:oob" ->
|
|
render(conn, "results.html", %{
|
|
auth: auth
|
|
})
|
|
|
|
true ->
|
|
connector = if String.contains?(redirect_uri, "?"), do: "&", else: "?"
|
|
url = "#{redirect_uri}#{connector}"
|
|
url_params = %{:code => auth.token}
|
|
|
|
url_params =
|
|
if auth_params["state"] do
|
|
Map.put(url_params, :state, auth_params["state"])
|
|
else
|
|
url_params
|
|
end
|
|
|
|
url = "#{url}#{Plug.Conn.Query.encode(url_params)}"
|
|
|
|
redirect(conn, external: url)
|
|
end
|
|
else
|
|
{scopes_issue, _} when scopes_issue in [:unsupported_scopes, :missing_scopes] ->
|
|
conn
|
|
|> put_flash(:error, "Permissions not specified.")
|
|
|> put_status(:unauthorized)
|
|
|> authorize(auth_params)
|
|
|
|
{:auth_active, false} ->
|
|
conn
|
|
|> put_flash(:error, "Account confirmation pending.")
|
|
|> put_status(:forbidden)
|
|
|> authorize(auth_params)
|
|
|
|
error ->
|
|
Authenticator.handle_error(conn, error)
|
|
end
|
|
end
|
|
|
|
def token_exchange(conn, %{"grant_type" => "authorization_code"} = params) do
|
|
with %App{} = app <- get_app_from_request(conn, params),
|
|
fixed_token = fix_padding(params["code"]),
|
|
%Authorization{} = auth <-
|
|
Repo.get_by(Authorization, token: fixed_token, app_id: app.id),
|
|
%User{} = user <- Repo.get(User, auth.user_id),
|
|
{:ok, token} <- Token.exchange_token(app, auth),
|
|
{:ok, inserted_at} <- DateTime.from_naive(token.inserted_at, "Etc/UTC") do
|
|
response = %{
|
|
token_type: "Bearer",
|
|
access_token: token.token,
|
|
refresh_token: token.refresh_token,
|
|
created_at: DateTime.to_unix(inserted_at),
|
|
expires_in: 60 * 10,
|
|
scope: Enum.join(token.scopes, " "),
|
|
me: user.ap_id
|
|
}
|
|
|
|
json(conn, response)
|
|
else
|
|
_error ->
|
|
put_status(conn, 400)
|
|
|> json(%{error: "Invalid credentials"})
|
|
end
|
|
end
|
|
|
|
def token_exchange(
|
|
conn,
|
|
%{"grant_type" => "password"} = params
|
|
) do
|
|
with {_, {:ok, %User{} = user}} <- {:get_user, Authenticator.get_user(conn, params)},
|
|
%App{} = app <- get_app_from_request(conn, params),
|
|
{:auth_active, true} <- {:auth_active, User.auth_active?(user)},
|
|
scopes <- oauth_scopes(params, app.scopes),
|
|
[] <- scopes -- app.scopes,
|
|
true <- Enum.any?(scopes),
|
|
{:ok, auth} <- Authorization.create_authorization(app, user, scopes),
|
|
{:ok, token} <- Token.exchange_token(app, auth) do
|
|
response = %{
|
|
token_type: "Bearer",
|
|
access_token: token.token,
|
|
refresh_token: token.refresh_token,
|
|
expires_in: 60 * 10,
|
|
scope: Enum.join(token.scopes, " "),
|
|
me: user.ap_id
|
|
}
|
|
|
|
json(conn, response)
|
|
else
|
|
{:auth_active, false} ->
|
|
conn
|
|
|> put_status(:forbidden)
|
|
|> json(%{error: "Account confirmation pending"})
|
|
|
|
_error ->
|
|
put_status(conn, 400)
|
|
|> json(%{error: "Invalid credentials"})
|
|
end
|
|
end
|
|
|
|
def token_exchange(
|
|
conn,
|
|
%{"grant_type" => "password", "name" => name, "password" => _password} = params
|
|
) do
|
|
params =
|
|
params
|
|
|> Map.delete("name")
|
|
|> Map.put("username", name)
|
|
|
|
token_exchange(conn, params)
|
|
end
|
|
|
|
def token_revoke(conn, %{"token" => token} = params) do
|
|
with %App{} = app <- get_app_from_request(conn, params),
|
|
%Token{} = token <- Repo.get_by(Token, token: token, app_id: app.id),
|
|
{:ok, %Token{}} <- Repo.delete(token) do
|
|
json(conn, %{})
|
|
else
|
|
_error ->
|
|
# RFC 7009: invalid tokens [in the request] do not cause an error response
|
|
json(conn, %{})
|
|
end
|
|
end
|
|
|
|
# XXX - for whatever reason our token arrives urlencoded, but Plug.Conn should be
|
|
# decoding it. Investigate sometime.
|
|
defp fix_padding(token) do
|
|
token
|
|
|> URI.decode()
|
|
|> Base.url_decode64!(padding: false)
|
|
|> Base.url_encode64(padding: false)
|
|
end
|
|
|
|
defp get_app_from_request(conn, params) do
|
|
# Per RFC 6749, HTTP Basic is preferred to body params
|
|
{client_id, client_secret} =
|
|
with ["Basic " <> encoded] <- get_req_header(conn, "authorization"),
|
|
{:ok, decoded} <- Base.decode64(encoded),
|
|
[id, secret] <-
|
|
String.split(decoded, ":")
|
|
|> Enum.map(fn s -> URI.decode_www_form(s) end) do
|
|
{id, secret}
|
|
else
|
|
_ -> {params["client_id"], params["client_secret"]}
|
|
end
|
|
|
|
if client_id && client_secret do
|
|
Repo.get_by(
|
|
App,
|
|
client_id: client_id,
|
|
client_secret: client_secret
|
|
)
|
|
else
|
|
nil
|
|
end
|
|
end
|
|
|
|
# Special case: Local MastodonFE
|
|
defp redirect_uri(conn, "."), do: mastodon_api_url(conn, :login)
|
|
|
|
defp redirect_uri(_conn, redirect_uri), do: redirect_uri
|
|
end
|