From 00debc734b18bad0e9d7a1e4b5bf969add448d6e Mon Sep 17 00:00:00 2001
From: Hanno Becker <hanno.becker@arm.com>
Date: Tue, 8 Sep 2020 11:12:24 +0100
Subject: [PATCH] Minor improvement in ssl_tls13_keys.c

Signed-off-by: Hanno Becker <hanno.becker@arm.com>
---
 library/ssl_tls13_keys.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/ssl_tls13_keys.c b/library/ssl_tls13_keys.c
index c334dbca6..8725d1495 100644
--- a/library/ssl_tls13_keys.c
+++ b/library/ssl_tls13_keys.c
@@ -111,7 +111,7 @@ static void ssl_tls1_3_hkdf_encode_label(
 
     /* Add context value */
     *p++ = (unsigned char)( clen & 0xFF );
-    if( ctx != NULL )
+    if( clen != 0 )
         memcpy( p, ctx, clen );
 
     /* Return total length to the caller.  */