Remote Timeline: add Streaming support

[akkoma] / lib / pleroma / plugs / authentication_plug.ex

diff --git a/lib/pleroma/plugs/authentication_plug.ex b/lib/pleroma/plugs/authentication_plug.ex
index d47c3fdae75e63deee1b7fda2e9693ac54e0f4d0..057ea42f152f5e098a05708ff5d3b8b3571a576f 100644 (file)
--- a/lib/pleroma/plugs/authentication_plug.ex
+++ b/lib/pleroma/plugs/authentication_plug.ex
@@ -1,60 +1,80 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule Pleroma.Plugs.AuthenticationPlug do
-  alias Comeonin.Pbkdf2
+  alias Pleroma.Plugs.OAuthScopesPlug
+  alias Pleroma.User
+
   import Plug.Conn
 
-  def init(options) do
-    options
+  require Logger
+
+  def init(options), do: options
+
+  def checkpw(password, "$6" <> _ = password_hash) do
+    :crypt.crypt(password, password_hash) == password_hash
   end
 
-  def call(conn, opts) do
-    with {:ok, username, password} <- decode_header(conn),
-         {:ok, user} <- opts[:fetcher].(username),
-         saved_user_id <- get_session(conn, :user_id),
-         {:ok, verified_user} <- verify(user, password, saved_user_id)
-    do
-      conn
-      |> assign(:user, verified_user)
-      |> put_session(:user_id, verified_user.id)
-    else
-      _ -> conn |> halt_or_continue(opts)
-    end
+  def checkpw(password, "$2" <> _ = password_hash) do
+    # Handle bcrypt passwords for Mastodon migration
+    Bcrypt.verify_pass(password, password_hash)
   end
 
-  # Short-circuit if we have a cookie with the id for the given user.
-  defp verify(%{id: id} = user, _password, id) do
-    {:ok, user}
+  def checkpw(password, "$pbkdf2" <> _ = password_hash) do
+    Pbkdf2.verify_pass(password, password_hash)
   end
 
-  defp verify(nil, _password, _user_id) do
-    Pbkdf2.dummy_checkpw
-    :error
+  def checkpw(_password, _password_hash) do
+    Logger.error("Password hash not recognized")
+    false
   end
 
-  defp verify(user, password, _user_id) do
-    if Pbkdf2.checkpw(password, user.password_hash) do
-      {:ok, user}
-    else
-      :error
-    end
+  def maybe_update_password(%User{password_hash: "$2" <> _} = user, password) do
+    do_update_password(user, password)
   end
 
-  defp decode_header(conn) do
-    with ["Basic " <> header] <- get_req_header(conn, "authorization"),
-         {:ok, userinfo} <- Base.decode64(header),
-         [username, password] <- String.split(userinfo, ":")
-    do
-      {:ok, username, password}
-    end
+  def maybe_update_password(%User{password_hash: "$6" <> _} = user, password) do
+    do_update_password(user, password)
   end
 
-  defp halt_or_continue(conn, %{optional: true}) do
-    conn |> assign(:user, nil)
+  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)
+      |> OAuthScopesPlug.skip_plug()
+    else
+      conn
+    end
   end
 
-  defp halt_or_continue(conn, _) do
+  def call(%{assigns: %{auth_credentials: %{password: _}}} = conn, _) do
+    Pbkdf2.no_user_verify()
     conn
-    |> put_resp_content_type("application/json")
-    |> send_resp(403, Poison.encode!(%{error: "Invalid credentials."}))
-    |> halt
   end
+
+  def call(conn, _), do: conn
 end