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	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Signature do
	@behaviour HTTPSignatures.Adapter

	alias Pleroma.Keys
	alias Pleroma.User
	alias Pleroma.Web.ActivityPub.ActivityPub
	alias Pleroma.Web.ActivityPub.Utils

	def fetch_public_key(conn) do
	with actor_id <- Utils.get_ap_id(conn.params["actor"]),
	{:ok, public_key} <- User.get_public_key_for_ap_id(actor_id) do
	{:ok, public_key}
	else
	e ->
	{:error, e}
	end
	end

	def refetch_public_key(conn) do
	with actor_id <- Utils.get_ap_id(conn.params["actor"]),
	{:ok, _user} <- ActivityPub.make_user_from_ap_id(actor_id),
	{:ok, public_key} <- User.get_public_key_for_ap_id(actor_id) do
	{:ok, public_key}
	else
	e ->
	{:error, e}
	end
	end

	def sign(%User{} = user, headers) do
	with {:ok, %{info: %{keys: keys}}} <- User.ensure_keys_present(user),
	{:ok, private_key, _} <- Keys.keys_from_pem(keys) do
	HTTPSignatures.sign(private_key, user.ap_id <> "#main-key", headers)
	end
	end
	end