61 lines
1.5 KiB
Elixir
61 lines
1.5 KiB
Elixir
defmodule Pleroma.Plugs.AuthenticationPlug do
|
|
alias Comeonin.Pbkdf2
|
|
import Plug.Conn
|
|
|
|
def init(options) do
|
|
options
|
|
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
|
|
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}
|
|
end
|
|
|
|
defp verify(nil, _password, _user_id) do
|
|
Pbkdf2.dummy_checkpw
|
|
:error
|
|
end
|
|
|
|
defp verify(user, password, _user_id) do
|
|
if Pbkdf2.checkpw(password, user.password_hash) do
|
|
{:ok, user}
|
|
else
|
|
:error
|
|
end
|
|
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
|
|
end
|
|
|
|
defp halt_or_continue(conn, %{optional: true}) do
|
|
conn |> assign(:user, nil)
|
|
end
|
|
|
|
defp halt_or_continue(conn, _) do
|
|
conn
|
|
|> put_resp_content_type("application/json")
|
|
|> send_resp(403, Poison.encode!(%{error: "Invalid credentials."}))
|
|
|> halt
|
|
end
|
|
end
|