If the TLSv1.3 code has not recorded an error and something already exists

on the error stack, refrain from pushing an 'unknown' error on the stack.
This should allow libcrypto errors (including bio) to be visible, where we
have nothing better to offer.

ok tb@

1 files changed, 2 insertions, 1 deletions

diff --git a/src/lib/libssl/tls13_client.c b/src/lib/libssl/tls13_client.c
index f75f605ace..3c55be6e68 100644
--- a/src/lib/libssl/tls13_client.c
+++ b/src/lib/libssl/tls13_client.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: tls13_client.c,v 1.37 2020/01/26 06:55:17 jsing Exp $ */
+/* $OpenBSD: tls13_client.c,v 1.38 2020/01/29 17:03:58 jsing Exp $ */
 /*
  * Copyright (c) 2018, 2019 Joel Sing <jsing@openbsd.org>
  *
@@ -87,6 +87,7 @@ tls13_legacy_connect(SSL *ssl)
                 }
         }
 
+        ERR_clear_error();
         S3I(ssl)->hs.state = SSL_ST_CONNECT;
 
         ret = tls13_connect(ctx);