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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Web.Auth.PleromaAuthenticator do
   6   alias Comeonin.Pbkdf2
   7   alias Pleroma.User
   8
   9   @behaviour Pleroma.Web.Auth.Authenticator
  10
  11   def get_user(%Plug.Conn{} = _conn, %{
  12         "authorization" => %{"name" => name, "password" => password}
  13       }) do
  14     with {_, %User{} = user} <- {:user, User.get_by_nickname_or_email(name)},
  15          {_, true} <- {:checkpw, Pbkdf2.checkpw(password, user.password_hash)} do
  16       {:ok, user}
  17     else
  18       error ->
  19         {:error, error}
  20     end
  21   end
  22
  23   def get_user(%Plug.Conn{} = _conn, _params), do: {:error, :missing_credentials}
  24
  25   def get_or_create_user_by_oauth(
  26         %Plug.Conn{assigns: %{ueberauth_auth: %{provider: provider, uid: uid} = auth}},
  27         _params
  28       ) do
  29     user = User.get_by_auth_provider_uid(provider, uid)
  30
  31     if user do
  32       {:ok, user}
  33     else
  34       info = auth.info
  35       email = info.email
  36       nickname = info.nickname
  37
  38       # TODO: FIXME: connect to existing (non-oauth) account (need a UI flow for that) / generate a random nickname?
  39       email =
  40         if email && User.get_by_email(email) do
  41           nil
  42         else
  43           email
  44         end
  45
  46       nickname =
  47         if nickname && User.get_by_nickname(nickname) do
  48           nil
  49         else
  50           nickname
  51         end
  52
  53       new_user =
  54         User.oauth_register_changeset(
  55           %User{},
  56           %{
  57             auth_provider: to_string(provider),
  58             auth_provider_uid: to_string(uid),
  59             name: info.name,
  60             bio: info.description,
  61             email: email,
  62             nickname: nickname
  63           }
  64         )
  65
  66       Pleroma.Repo.insert(new_user)
  67     end
  68   end
  69
  70   def get_or_create_user_by_oauth(%Plug.Conn{} = _conn, _params),
  71     do: {:error, :missing_credentials}
  72
  73   def handle_error(%Plug.Conn{} = _conn, error) do
  74     error
  75   end
  76
  77   def auth_template, do: nil
  78 end