From 3df7287d213c08eb519c0799a32f1880c7146e8a Mon Sep 17 00:00:00 2001
From: Sergei Golubchik <serg@mariadb.org>
Date: Wed, 28 Nov 2018 12:20:37 +0100
Subject: [PATCH] fix the test for the empty password hash string

because the first byte of a _binary hash_ can be 0x00 too.

This fixes main.connect test on centos73-ppc64
---
 sql/sql_acl.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sql/sql_acl.cc b/sql/sql_acl.cc
index 3c8eceed7d4..223733159da 100644
--- a/sql/sql_acl.cc
+++ b/sql/sql_acl.cc
@@ -13583,7 +13583,7 @@ static int old_password_authenticate(MYSQL_PLUGIN_VIO *vio,
     pkt_len= (int)strnlen((char*)pkt, pkt_len);
 
   if (pkt_len == 0) /* no password */
-    return info->auth_string[0] ? CR_AUTH_USER_CREDENTIALS : CR_OK;
+    return info->auth_string_length ? CR_AUTH_USER_CREDENTIALS : CR_OK;
 
   if (secure_auth(thd))
     return CR_AUTH_HANDSHAKE;