backup_codes.ex (990B)
- # Pleroma: A lightweight social networking server
- # Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
- # SPDX-License-Identifier: AGPL-3.0-only
- defmodule Pleroma.MFA.BackupCodes do
- @moduledoc """
- This module contains functions for generating backup codes.
- """
- alias Pleroma.Config
- @config_ns [:instance, :multi_factor_authentication, :backup_codes]
- @doc """
- Generates backup codes.
- """
- @spec generate(Keyword.t()) :: list(String.t())
- def generate(opts \\ []) do
- number_of_codes = Keyword.get(opts, :number_of_codes, default_backup_codes_number())
- code_length = Keyword.get(opts, :length, default_backup_codes_code_length())
- Enum.map(1..number_of_codes, fn _ ->
- :crypto.strong_rand_bytes(div(code_length, 2))
- |> Base.encode16(case: :lower)
- end)
- end
- defp default_backup_codes_number, do: Config.get(@config_ns ++ [:number], 5)
- defp default_backup_codes_code_length,
- do: Config.get(@config_ns ++ [:length], 16)
- end