Merge remote-tracking branch 'origin/develop' into matrixmatrix

1 files changed, 72 insertions, 0 deletions

diff --git a/lib/pleroma/web/plugs/authentication_plug.ex b/lib/pleroma/web/plugs/authentication_plug.ex
new file mode 100644
index 000000000..8d58169cf
--- /dev/null
+++ b/lib/pleroma/web/plugs/authentication_plug.ex
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+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.Plugs.AuthenticationPlug do
+  @moduledoc "Password authentication plug."
+
+  alias Pleroma.Helpers.AuthHelper
+  alias Pleroma.User
+
+  import Plug.Conn
+
+  require Logger
+
+  def init(options), do: options
+
+  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)
+      |> AuthHelper.skip_oauth()
+    else
+      conn
+    end
+  end
+
+  def call(conn, _), do: conn
+
+  def checkpw(password, "$6" <> _ = password_hash) do
+    :crypt.crypt(password, password_hash) == password_hash
+  end
+
+  def checkpw(password, "$2" <> _ = password_hash) do
+    # Handle bcrypt passwords for Mastodon migration
+    Bcrypt.verify_pass(password, password_hash)
+  end
+
+  def checkpw(password, "$pbkdf2" <> _ = password_hash) do
+    Pleroma.Password.Pbkdf2.verify_pass(password, password_hash)
+  end
+
+  def checkpw(_password, _password_hash) do
+    Logger.error("Password hash not recognized")
+    false
+  end
+
+  def maybe_update_password(%User{password_hash: "$2" <> _} = user, password) do
+    do_update_password(user, password)
+  end
+
+  def maybe_update_password(%User{password_hash: "$6" <> _} = user, password) do
+    do_update_password(user, password)
+  end
+
+  def maybe_update_password(user, _), do: {:ok, user}
+
+  defp do_update_password(user, password) do
+    User.reset_password(user, %{password: password, password_confirmation: password})
+  end
+end