Added explicit support for TLS v1.3

From 8d20bf3b790991a33c0ab721a2746ec222a74f2a Mon Sep 17 00:00:00 2001
From: Parker Ellertson <pellertson@firemail.cc>
Date: Tue, 2 Jun 2020 15:06:34 -0700
Subject: [PATCH bollux] Added explicit support for TLS v1.3

1 files changed, 9 insertions, 3 deletions

@@ -304,9 +304,15 @@ request_url() {
         local port="$2"
         local url="$3"
 
-        ssl_cmd=(openssl s_client -crlf -quiet -connect "$server:$port")
-        ssl_cmd+=(-servername "$server") # SNI
-        run "${ssl_cmd[@]}" <<<"$url" 2>/dev/null
+        # support for TLS v1.3 and v1.2
+        ssl_cmd_tls1_2=(openssl s_client -tls1_2 -crlf -quiet -connect "$server:$port")
+        ssl_cmd_tls1_3=(openssl s_client -tls1_3 -crlf -quiet -connect "$server:$port")
+        
+        ssl_cmd_tls1_2+=(-servername "$server") # SNI
+        ssl_cmd_tls1_3+=(-servername "$server") # SNI
+
+        # always try to connect with TLS v1.3 first
+        run "${ssl_cmd_tls1_3[@]}" <<<"$url" 2>/dev/null || run "${ssl_cmd_tls1_2[@]}" <<< "$url" 2>/dev/null
 }
 
 handle_response() {