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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Signature do
   6   @behaviour HTTPSignatures.Adapter
   7
   8   alias Pleroma.User
   9   alias Pleroma.Web.ActivityPub.ActivityPub
  10   alias Pleroma.Web.ActivityPub.Utils
  11   alias Pleroma.Web.Salmon
  12   alias Pleroma.Web.WebFinger
  13
  14   def fetch_public_key(conn) do
  15     with actor_id <- Utils.get_ap_id(conn.params["actor"]),
  16          {:ok, public_key} <- User.get_public_key_for_ap_id(actor_id) do
  17       {:ok, public_key}
  18     else
  19       e ->
  20         {:error, e}
  21     end
  22   end
  23
  24   def refetch_public_key(conn) do
  25     with actor_id <- Utils.get_ap_id(conn.params["actor"]),
  26          {:ok, _user} <- ActivityPub.make_user_from_ap_id(actor_id),
  27          {:ok, public_key} <- User.get_public_key_for_ap_id(actor_id) do
  28       {:ok, public_key}
  29     else
  30       e ->
  31         {:error, e}
  32     end
  33   end
  34
  35   def sign(%User{} = user, headers) do
  36     with {:ok, %{info: %{keys: keys}}} <- WebFinger.ensure_keys_present(user),
  37          {:ok, private_key, _} <- Salmon.keys_from_pem(keys) do
  38       HTTPSignatures.sign(private_key, user.ap_id <> "#main-key", headers)
  39     end
  40   end
  41 end