From 67192c2a5eb498e18f27ccfedb48e5e8e41e775c Mon Sep 17 00:00:00 2001
From: Gaukas Wang <i@gauk.as>
Date: Mon, 4 Sep 2023 14:38:20 -0600
Subject: [PATCH] fix: lost secondary keyshares (#238)

Fix an unchecked overriding behavior which may lose pre-created handshake keys.
---
 u_conn.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/u_conn.go b/u_conn.go
index efa4ee79..38e5149d 100644
--- a/u_conn.go
+++ b/u_conn.go
@@ -567,7 +567,9 @@ func (c *UConn) clientHandshake(ctx context.Context) (err error) {
 		hs13 := c.HandshakeState.toPrivate13()
 		hs13.serverHello = serverHello
 		hs13.hello = hello
-		hs13.keySharesParams = NewKeySharesParameters()
+		if hs13.keySharesParams == nil {
+			hs13.keySharesParams = NewKeySharesParameters()
+		}
 		if !sessionIsLocked {
 			hs13.earlySecret = earlySecret
 			hs13.binderKey = binderKey