akkoma/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
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defmodule Pleroma.Web.Plugs.AuthenticationPlug do
@moduledoc "Password authentication plug."
alias Pleroma.Helpers.AuthHelper
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alias Pleroma.User
import Plug.Conn
require Logger
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def init(options), do: options
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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
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def checkpw(password, "$6" <> _ = password_hash) do
:crypt.crypt(password, password_hash) == password_hash
end
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def checkpw(password, "$2" <> _ = password_hash) do
# Handle bcrypt passwords for Mastodon migration
Bcrypt.verify_pass(password, password_hash)
end
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def checkpw(password, "$pbkdf2" <> _ = password_hash) do
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Pleroma.Password.Pbkdf2.verify_pass(password, password_hash)
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end
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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
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end