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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
def key_id_to_actor_id(key_id) do
URI.parse(key_id)
|> Map.put(:fragment, nil)
|> URI.to_string()
end
def fetch_public_key(conn) do
with %{"keyId" => kid} <- HTTPSignatures.signature_for_conn(conn),
actor_id <- key_id_to_actor_id(kid),
{: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 %{"keyId" => kid} <- HTTPSignatures.signature_for_conn(conn),
actor_id <- key_id_to_actor_id(kid),
{: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
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