Provide tls_conn_cipher_strength().

This returns the strength in bits of the symmetric cipher used for the
connection.

Diff from gilles@

ok tb@

1 files changed, 2 insertions, 1 deletions

diff --git a/src/lib/libtls/tls_internal.h b/src/lib/libtls/tls_internal.h
index 3842439d58..efccc9fdbe 100644
--- a/src/lib/libtls/tls_internal.h
+++ b/src/lib/libtls/tls_internal.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: tls_internal.h,v 1.74 2019/04/01 15:58:02 jsing Exp $ */
+/* $OpenBSD: tls_internal.h,v 1.75 2019/11/02 13:37:59 jsing Exp $ */
 /*
  * Copyright (c) 2014 Jeremie Courreges-Anglas <jca@openbsd.org>
  * Copyright (c) 2014 Joel Sing <jsing@openbsd.org>
@@ -112,6 +112,7 @@ struct tls_config {
 struct tls_conninfo {
         char *alpn;
         char *cipher;
+        int cipher_strength;
         char *servername;
         int session_resumed;
         char *version;