72 lines
2 KiB
Elixir
72 lines
2 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Web.OAuth.Token.Utils do
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@moduledoc """
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Auxiliary functions for dealing with tokens.
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"""
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alias Pleroma.Repo
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alias Pleroma.Web.OAuth.App
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@doc "Fetch app by client credentials from request"
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@spec fetch_app(Plug.Conn.t()) :: {:ok, App.t()} | {:error, :not_found}
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def fetch_app(conn) do
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res =
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conn
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|> fetch_client_credentials()
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|> fetch_client
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case res do
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%App{} = app -> {:ok, app}
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_ -> {:error, :not_found}
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end
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end
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defp fetch_client({id, secret}) when is_binary(id) and is_binary(secret) do
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Repo.get_by(App, client_id: id, client_secret: secret)
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end
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defp fetch_client({_id, _secret}), do: nil
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defp fetch_client_credentials(conn) do
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# Per RFC 6749, HTTP Basic is preferred to body params
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with ["Basic " <> encoded] <- Plug.Conn.get_req_header(conn, "authorization"),
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{:ok, decoded} <- Base.decode64(encoded),
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[id, secret] <-
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Enum.map(
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String.split(decoded, ":"),
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fn s -> URI.decode_www_form(s) end
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) do
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{id, secret}
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else
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_ -> {conn.params["client_id"], conn.params["client_secret"]}
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end
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end
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@doc "convert token inserted_at to unix timestamp"
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def format_created_at(%{inserted_at: inserted_at} = _token) do
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inserted_at
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|> DateTime.from_naive!("Etc/UTC")
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|> DateTime.to_unix()
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end
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@doc false
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@spec generate_token(keyword()) :: binary()
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def generate_token(opts \\ []) do
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opts
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|> Keyword.get(:size, 32)
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|> :crypto.strong_rand_bytes()
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|> Base.url_encode64(padding: false)
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end
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# XXX - for whatever reason our token arrives urlencoded, but Plug.Conn should be
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# decoding it. Investigate sometime.
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def fix_padding(token) do
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token
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|> URI.decode()
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|> Base.url_decode64!(padding: false)
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|> Base.url_encode64(padding: false)
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end
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end
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