From aa6ed63bd8e08c3db5c2b364883e91bd28cea2f4 Mon Sep 17 00:00:00 2001
From: Kim Alvefur <zash@zash.se>
Date: Mon, 20 Nov 2017 00:26:41 +0100
Subject: certmanager: Filter out curves not supported by LuaSec

---
 core/certmanager.lua | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/core/certmanager.lua b/core/certmanager.lua
index dd6cabae..e13a5d8e 100644
--- a/core/certmanager.lua
+++ b/core/certmanager.lua
@@ -27,6 +27,7 @@ local stat = require "lfs".attributes;
 
 local tonumber, tostring = tonumber, tostring;
 local pairs = pairs;
+local t_remove = table.remove;
 local type = type;
 local io_open = io.open;
 local select = select;
@@ -131,6 +132,17 @@ local core_defaults = {
 		"!aNULL",      -- Ciphers that does not authenticate the connection
 	};
 }
+
+if luasec_has.curves then
+	for i = #core_defaults.curveslist, 1, -1 do
+		if not luasec_has.curves[ core_defaults.curveslist[i] ] then
+			t_remove(core_defaults.curveslist, i);
+		end
+	end
+else
+	core_defaults.curveslist = nil;
+end
+
 local path_options = { -- These we pass through resolve_path()
 	key = true, certificate = true, cafile = true, capath = true, dhparam = true
 }
-- 
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