Rename MobilizonWeb to Mobilizon.Web

lib/web/plugs/http_signatures.ex

@@ -0,0 +1,56 @@
+# Portions of this file are derived from Pleroma:
+# Copyright © 2017-2018 Pleroma Authors <https://pleroma.social>
+# SPDX-License-Identifier: AGPL-3.0-only
+# Upstream: https://git.pleroma.social/pleroma/pleroma/blob/develop/lib/pleroma/plugs/http_signature.ex
+
+defmodule Mobilizon.Web.Plugs.HTTPSignatures do
+  @moduledoc """
+  Plug to check HTTP Signatures on every incoming request
+  """
+
+  import Plug.Conn
+
+  require Logger
+
+  def init(options) do
+    options
+  end
+
+  def call(%{assigns: %{valid_signature: true}} = conn, _opts) do
+    conn
+  end
+
+  def call(conn, _opts) do
+    case get_req_header(conn, "signature") do
+      [signature | _] ->
+        if signature do
+          # set (request-target) header to the appropriate value
+          # we also replace the digest header with the one we computed
+          conn =
+            conn
+            |> put_req_header(
+              "(request-target)",
+              String.downcase("#{conn.method}") <> " #{conn.request_path}"
+            )
+
+          conn =
+            if conn.assigns[:digest] do
+              conn
+              |> put_req_header("digest", conn.assigns[:digest])
+            else
+              conn
+            end
+
+          signature_valid = HTTPSignatures.validate_conn(conn)
+          Logger.debug("Is signature valid ? #{inspect(signature_valid)}")
+          assign(conn, :valid_signature, signature_valid)
+        else
+          Logger.debug("No signature header!")
+          conn
+        end
+
+      _ ->
+        conn
+    end
+  end
+end