X-Git-Url: http://git.squeep.com/?a=blobdiff_plain;f=lib%2Fpleroma%2Fweb%2Foauth%2Foauth_controller.ex;h=20c2e799bf8601f3cf3ef2b28ebe2d317e41ef1a;hb=eadafc88b898879eb50545b700ea13c8596e908b;hp=94318bfa91e604307431d160c5ccb62666c80bf8;hpb=bdb5dd21943f886a1b4181aebd73e60662536e93;p=akkoma

diff --git a/lib/pleroma/web/oauth/oauth_controller.ex b/lib/pleroma/web/oauth/oauth_controller.ex
index 94318bfa9..54e0a35ba 100644
--- a/lib/pleroma/web/oauth/oauth_controller.ex
+++ b/lib/pleroma/web/oauth/oauth_controller.ex
@@ -1,70 +1,408 @@
+# 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.Web.OAuth.{Authorization, Token, App}
-  alias Pleroma.{Repo, User}
-  alias Comeonin.Pbkdf2
+  alias Pleroma.Registration
+  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
+  plug(:fetch_session)
+  plug(:fetch_flash)
 
-  action_fallback Pleroma.Web.OAuth.FallbackController
+  action_fallback(Pleroma.Web.OAuth.FallbackController)
 
   def authorize(conn, params) do
-    render conn, "show.html", %{
+    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"],
-      scope: params["scope"],
+      available_scopes: available_scopes,
+      scopes: scopes,
       redirect_uri: params["redirect_uri"],
-      state: params["state"]
-    }
+      state: params["state"],
+      params: params
+    })
   end
 
-  def create_authorization(conn, %{"authorization" => %{"name" => name, "password" => password, "client_id" => client_id, "redirect_uri" => redirect_uri} = params}) do
-    with %User{} = user <- User.get_cached_by_nickname(name),
-         true <- Pbkdf2.checkpw(password, user.password_hash),
-         %App{} = app <- Repo.get_by(App, client_id: client_id),
-         {:ok, auth} <- Authorization.create_authorization(app, user) do
-      if redirect_uri == "urn:ietf:wg:oauth:2.0:oob" do
-        render conn, "results.html", %{
-          auth: auth
-        }
-      else
-        connector = if String.contains?(redirect_uri, "?"), do: "&", else: "?"
-        url = "#{redirect_uri}#{connector}code=#{auth.token}"
-        url = if params["state"] do
-          url <> "&state=#{params["state"]}"
-        else
-          url
-        end
-        redirect(conn, external: url)
+  def create_authorization(
+        conn,
+        %{
+          "authorization" => %{"redirect_uri" => redirect_uri} = auth_params
+        } = params,
+        opts \\ []
+      ) do
+    with {:ok, auth} <-
+           (opts[:auth] && {:ok, opts[:auth]}) ||
+             do_create_authorization(conn, params, opts[:user]) 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] ->
+        # Per https://github.com/tootsuite/mastodon/blob/
+        #   51e154f5e87968d6bb115e053689767ab33e80cd/app/controllers/api/base_controller.rb#L39
+        conn
+        |> put_flash(:error, "This action is outside the authorized scopes")
+        |> put_status(:unauthorized)
+        |> authorize(auth_params)
+
+      {:auth_active, false} ->
+        # Per https://github.com/tootsuite/mastodon/blob/
+        #   51e154f5e87968d6bb115e053689767ab33e80cd/app/controllers/api/base_controller.rb#L76
+        conn
+        |> put_flash(:error, "Your login is missing a confirmed e-mail address")
+        |> put_status(:forbidden)
+        |> authorize(auth_params)
+
+      error ->
+        Authenticator.handle_error(conn, error)
     end
   end
 
-  # TODO
-  # - proper scope handling
   def token_exchange(conn, %{"grant_type" => "authorization_code"} = params) do
-    with %App{} = app <- Repo.get_by(App, client_id: params["client_id"], client_secret: params["client_secret"]),
+    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),
+         %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: "read write follow"
+        scope: Enum.join(token.scopes, " "),
+        me: user.ap_id
       }
+
       json(conn, response)
     else
-      _error -> json(conn, %{error: "Invalid credentials"})
+      {:auth_active, false} ->
+        # Per https://github.com/tootsuite/mastodon/blob/
+        #   51e154f5e87968d6bb115e053689767ab33e80cd/app/controllers/api/base_controller.rb#L76
+        conn
+        |> put_status(:forbidden)
+        |> json(%{error: "Your login is missing a confirmed e-mail address"})
+
+      _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
+
+  def prepare_request(conn, %{"provider" => provider} = params) do
+    scope =
+      oauth_scopes(params, [])
+      |> Enum.join(" ")
+
+    state =
+      params
+      |> Map.delete("scopes")
+      |> Map.put("scope", scope)
+      |> Poison.encode!()
+
+    params =
+      params
+      |> Map.drop(~w(scope scopes client_id redirect_uri))
+      |> Map.put("state", state)
+
+    redirect(conn, to: o_auth_path(conn, :request, provider, params))
+  end
+
+  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, params) do
+    params = callback_params(params)
+    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, params["redirect_uri"]))
+  end
+
+  def callback(conn, params) do
+    params = callback_params(params)
+
+    with {:ok, registration} <- Authenticator.get_registration(conn, params) do
+      user = Repo.preload(registration, :user).user
+
+      auth_params = %{
+        "client_id" => params["client_id"],
+        "redirect_uri" => params["redirect_uri"],
+        "scopes" => oauth_scopes(params, nil)
+      }
+
+      if user do
+        create_authorization(
+          conn,
+          %{"authorization" => auth_params},
+          user: user
+        )
+      else
+        registration_params =
+          Map.merge(auth_params, %{
+            "nickname" => Registration.nickname(registration),
+            "email" => Registration.email(registration)
+          })
+
+        conn
+        |> put_session(:registration_id, registration.id)
+        |> redirect(to: o_auth_path(conn, :registration_details, registration_params))
+      end
+    else
+      _ ->
+        conn
+        |> put_flash(:error, "Failed to set up user account.")
+        |> redirect(external: redirect_uri(conn, params["redirect_uri"]))
     end
   end
 
+  defp callback_params(%{"state" => state} = params) do
+    Map.merge(params, Poison.decode!(state))
+  end
+
+  def registration_details(conn, params) do
+    render(conn, "register.html", %{
+      client_id: params["client_id"],
+      redirect_uri: params["redirect_uri"],
+      scopes: oauth_scopes(params, []),
+      nickname: params["nickname"],
+      email: params["email"]
+    })
+  end
+
+  def register(conn, %{"op" => "connect"} = params) do
+    create_authorization_params = %{
+      "authorization" => Map.merge(params, %{"name" => params["auth_name"]})
+    }
+
+    with registration_id when not is_nil(registration_id) <- get_session_registration_id(conn),
+         %Registration{} = registration <- Repo.get(Registration, registration_id),
+         {:ok, auth} <- do_create_authorization(conn, create_authorization_params),
+         %User{} = user <- Repo.preload(auth, :user).user,
+         {:ok, _updated_registration} <- Registration.bind_to_user(registration, user) do
+      conn
+      |> put_session_registration_id(nil)
+      |> create_authorization(
+        create_authorization_params,
+        auth: auth
+      )
+    else
+      _ ->
+        conn
+        |> put_flash(:error, "Unknown error, please try again.")
+        |> redirect(to: o_auth_path(conn, :registration_details, params))
+    end
+  end
+
+  def register(conn, params) do
+    with registration_id when not is_nil(registration_id) <- get_session_registration_id(conn),
+         %Registration{} = registration <- Repo.get(Registration, registration_id),
+         {:ok, user} <- Authenticator.create_from_registration(conn, params, registration) do
+      conn
+      |> put_session_registration_id(nil)
+      |> create_authorization(
+        %{
+          "authorization" => %{
+            "client_id" => params["client_id"],
+            "redirect_uri" => params["redirect_uri"],
+            "scopes" => oauth_scopes(params, nil)
+          }
+        },
+        user: user
+      )
+    else
+      {:error, changeset} ->
+        message =
+          Enum.map(changeset.errors, fn {field, {error, _}} ->
+            "#{field} #{error}"
+          end)
+          |> Enum.join("; ")
+
+        message =
+          String.replace(
+            message,
+            "ap_id has already been taken",
+            "nickname has already been taken"
+          )
+
+        conn
+        |> put_flash(:error, "Error: #{message}.")
+        |> redirect(to: o_auth_path(conn, :registration_details, params))
+
+      _ ->
+        conn
+        |> put_flash(:error, "Unknown error, please try again.")
+        |> redirect(to: o_auth_path(conn, :registration_details, params))
+    end
+  end
+
+  defp do_create_authorization(
+         conn,
+         %{
+           "authorization" =>
+             %{
+               "client_id" => client_id,
+               "redirect_uri" => redirect_uri
+             } = auth_params
+         } = params,
+         user \\ nil
+       ) 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)} do
+      Authorization.create_authorization(app, user, scopes)
+    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
+    |> 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
+
+  defp get_session_registration_id(conn), do: get_session(conn, :registration_id)
+
+  defp put_session_registration_id(conn, registration_id),
+    do: put_session(conn, :registration_id, registration_id)
 end