From 90430fa66dca7d828858aa06ca03ce44c0cd2629 Mon Sep 17 00:00:00 2001
From: William Yang <mscame@gmail.com>
Date: Thu, 5 Oct 2023 16:24:39 +0200
Subject: [PATCH] fix(tls): undefined keyusage

---
 apps/emqx/src/emqx_tls_lib.erl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/emqx/src/emqx_tls_lib.erl b/apps/emqx/src/emqx_tls_lib.erl
index 3c08487a4..d2a85264d 100644
--- a/apps/emqx/src/emqx_tls_lib.erl
+++ b/apps/emqx/src/emqx_tls_lib.erl
@@ -697,7 +697,7 @@ opt_partial_chain(SslOpts) ->
 
 %% @doc make verify_fun if set.
 -spec opt_verify_fun(SslOpts :: map()) -> NewSslOpts :: map().
-opt_verify_fun(#{verify_peer_ext_key_usage := V} = SslOpts) ->
+opt_verify_fun(#{verify_peer_ext_key_usage := V} = SslOpts) when V =/= undefined ->
     SslOpts#{verify_fun => emqx_const_v2:make_tls_verify_fun(verify_cert_extKeyUsage, V)};
 opt_verify_fun(SslOpts) ->
     SslOpts.