+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
# https://tools.ietf.org/html/draft-cavage-http-signatures-08
defmodule Pleroma.Web.HTTPSignatures do
alias Pleroma.User
+ alias Pleroma.Web.ActivityPub.Utils
alias Pleroma.Web.ActivityPub.ActivityPub
require Logger
def split_signature(sig) do
default = %{"headers" => "date"}
- sig = sig
- |> String.trim()
- |> String.split(",")
- |> Enum.reduce(default, fn(part, acc) ->
- [key | rest] = String.split(part, "=")
- value = Enum.join(rest, "=")
- Map.put(acc, key, String.trim(value, "\""))
- end)
+ sig =
+ sig
+ |> String.trim()
+ |> String.split(",")
+ |> Enum.reduce(default, fn part, acc ->
+ [key | rest] = String.split(part, "=")
+ value = Enum.join(rest, "=")
+ Map.put(acc, key, String.trim(value, "\""))
+ end)
Map.put(sig, "headers", String.split(sig["headers"], ~r/\s/))
end
def validate(headers, signature, public_key) do
sigstring = build_signing_string(headers, signature["headers"])
+ Logger.debug("Signature: #{signature["signature"]}")
+ Logger.debug("Sigstring: #{sigstring}")
{:ok, sig} = Base.decode64(signature["signature"])
:public_key.verify(sigstring, :sha256, sig, public_key)
end
def validate_conn(conn) do
# TODO: How to get the right key and see if it is actually valid for that request.
# For now, fetch the key for the actor.
- with actor_id <- conn.params["actor"],
+ with actor_id <- Utils.get_ap_id(conn.params["actor"]),
{:ok, public_key} <- User.get_public_key_for_ap_id(actor_id) do
if validate_conn(conn, public_key) do
true
else
- Logger.debug("Could not validate, re-fetching user and trying one more time.")
+ Logger.debug("Could not validate, re-fetching user and trying one more time")
# Fetch user anew and try one more time
- with actor_id <- conn.params["actor"],
+ 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
validate_conn(conn, public_key)
end
end
else
- e ->
+ _e ->
Logger.debug("Could not public key!")
+ false
end
end
def build_signing_string(headers, used_headers) do
used_headers
- |> Enum.map(fn (header) -> "#{header}: #{headers[header]}" end)
+ |> Enum.map(fn header -> "#{header}: #{headers[header]}" end)
|> Enum.join("\n")
end
def sign(user, headers) do
- with {:ok, %{info: %{"keys" => keys}}} <- Pleroma.Web.WebFinger.ensure_keys_present(user),
+ with {:ok, %{info: %{keys: keys}}} <- Pleroma.Web.WebFinger.ensure_keys_present(user),
{:ok, private_key, _} = Pleroma.Web.Salmon.keys_from_pem(keys) do
sigstring = build_signing_string(headers, Map.keys(headers))
- signature = :public_key.sign(sigstring, :sha256, private_key)
- |> Base.encode64()
+
+ signature =
+ :public_key.sign(sigstring, :sha256, private_key)
+ |> Base.encode64()
[
keyId: user.ap_id <> "#main-key",
headers: Map.keys(headers) |> Enum.join(" "),
signature: signature
]
- |> Enum.map(fn({k, v}) -> "#{k}=\"#{v}\"" end)
+ |> Enum.map(fn {k, v} -> "#{k}=\"#{v}\"" end)
|> Enum.join(",")
end
end