Rename project to Mobilizon

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/mobilizon_web/http_signature.ex

@@ -0,0 +1,53 @@
+defmodule MobilizonWeb.HTTPSignaturePlug do
+  @moduledoc """
+  # HTTPSignaturePlug
+
+  Plug to check HTTP Signatures on every incoming request
+  """
+
+  alias Mobilizon.Service.HTTPSignatures
+  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
+    user = conn.params["actor"]
+
+    Logger.debug(fn ->
+      "Checking sig for #{user}"
+    end)
+
+    with [signature | _] <- get_req_header(conn, "signature") do
+      cond do
+        signature && String.contains?(signature, user) ->
+          conn =
+            conn
+            |> put_req_header(
+              "(request-target)",
+              String.downcase("#{conn.method}") <> " #{conn.request_path}"
+            )
+
+          assign(conn, :valid_signature, HTTPSignatures.validate_conn(conn))
+
+        signature ->
+          Logger.debug("Signature not from actor")
+          assign(conn, :valid_signature, false)
+
+        true ->
+          Logger.debug("No signature header!")
+          conn
+      end
+    else
+      _ ->
+        Logger.debug("No signature header!")
+        conn
+    end
+  end
+end