From 5d9f3df714fa986367e105c2267324c8478ccf9c Mon Sep 17 00:00:00 2001
From: Roger Braun <roger@rogerbraun.net>
Date: Thu, 4 May 2017 09:57:11 +0200
Subject: [PATCH] Just sign with an empty string if needed.

---
 lib/pleroma/web/websub/websub.ex | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/pleroma/web/websub/websub.ex b/lib/pleroma/web/websub/websub.ex
index c1532b6ce..ba86db50e 100644
--- a/lib/pleroma/web/websub/websub.ex
+++ b/lib/pleroma/web/websub/websub.ex
@@ -43,7 +43,7 @@ defmodule Pleroma.Web.Websub do
       |> :xmerl.export_simple(:xmerl_xml)
       |> to_string
 
-      signature = sign(sub.secret, response)
+      signature = sign(sub.secret || "", response)
       Logger.debug("Pushing to #{sub.callback}")
       HTTPoison.post(sub.callback, response, [
             {"Content-Type", "application/atom+xml"},