X-Git-Url: https://git.squeep.com/?a=blobdiff_plain;f=lib%2Fpleroma%2Fplugs%2Fhttp_signature.ex;h=51bec910e275ad6bf05d930336c97a53bbc169e3;hb=5a4e2905fecfd21cf92f6b2844f15f5ee84b33f5;hp=af160f3ee4fe3ec979795e32f12eb14c830bfa3f;hpb=2fab3c44f5a8fd5c2729d10330dae377ab60abdc;p=akkoma

diff --git a/lib/pleroma/plugs/http_signature.ex b/lib/pleroma/plugs/http_signature.ex
index af160f3ee..51bec910e 100644
--- a/lib/pleroma/plugs/http_signature.ex
+++ b/lib/pleroma/plugs/http_signature.ex
@@ -1,5 +1,10 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule Pleroma.Web.Plugs.HTTPSignaturePlug do
   alias Pleroma.Web.HTTPSignatures
+  alias Pleroma.Web.ActivityPub.Utils
   import Plug.Conn
   require Logger
 
@@ -7,26 +12,43 @@ defmodule Pleroma.Web.Plugs.HTTPSignaturePlug do
     options
   end
 
-  def call(%{assigns: %{valid_signature: true}} = conn, opts) do
+  def call(%{assigns: %{valid_signature: true}} = conn, _opts) do
     conn
   end
 
-  def call(conn, opts) do
-    user = conn.params["actor"]
+  def call(conn, _opts) do
+    user = Utils.get_ap_id(conn.params["actor"])
     Logger.debug("Checking sig for #{user}")
+    [signature | _] = get_req_header(conn, "signature")
+
+    cond do
+      signature && String.contains?(signature, user) ->
+        # 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
+
+        assign(conn, :valid_signature, HTTPSignatures.validate_conn(conn))
+
+      signature ->
+        Logger.debug("Signature not from actor")
+        assign(conn, :valid_signature, false)
 
-    if get_req_header(conn, "signature") do
-      conn =
+      true ->
+        Logger.debug("No signature header!")
         conn
-        |> put_req_header(
-          "(request-target)",
-          String.downcase("#{conn.method}") <> " #{conn.request_path}"
-        )
-
-      assign(conn, :valid_signature, HTTPSignatures.validate_conn(conn))
-    else
-      Logger.debug("No signature header!")
-      conn
     end
   end
 end