From a106ecc319f4c6427ee0fce5cec90d86a9cc7987 Mon Sep 17 00:00:00 2001
From: Jon Shallow <supjps-libcoap@jpshallow.com>
Date: Sun, 7 Apr 2019 17:48:46 +0100
Subject: [PATCH] Fix #321 was not correctly implemented

While #321 prevented a core dump, that fix still caused memory corruption.

src/coap_gnutls.c:

Correct the code to correctly NULL terminate the created username.
---
 src/coap_gnutls.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/coap_gnutls.c b/src/coap_gnutls.c
index 08f3099c..cbfdffbd 100644
--- a/src/coap_gnutls.c
+++ b/src/coap_gnutls.c
@@ -404,7 +404,7 @@ psk_client_callback(gnutls_session_t g_session,
   *username = gnutls_malloc(identity_len+1);
   if (*username) {
     memcpy(*username, identity, identity_len);
-    username[identity_len] = '\0';
+    (*username)[identity_len] = '\0';
   }
 
   key->data = gnutls_malloc(psk_len);