From 54b3f1b2526f5c2719494ea8208121e78793d919 Mon Sep 17 00:00:00 2001
From: Daniel Pouzzner <douzzer@wolfssl.com>
Date: Mon, 23 Aug 2021 14:06:39 -0500
Subject: [PATCH] src/tls.c:TLSX_KeyShare_GenDhKey(): don't generate a key if
 one is already set.

---
 src/tls.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/tls.c b/src/tls.c
index 4e052d5fe..cdd899530 100644
--- a/src/tls.c
+++ b/src/tls.c
@@ -6096,6 +6096,9 @@ static int TLSX_KeyShare_GenDhKey(WOLFSSL *ssl, KeyShareEntry* kse)
     word32          p_len;
 #endif
 
+    if (kse->key != NULL)
+        return 0;
+
     /* TODO: [TLS13] The key size should come from wolfcrypt. */
     /* Pick the parameters from the named group. */
 #ifdef HAVE_PUBLIC_FFDHE