Fixed #4409 Password of MySQL users does not get updated on MySQL 5.7 servers

server/plugins-available/mysql_clientdb_plugin.inc.php

@@ -143,9 +143,13 @@ class mysql_clientdb_plugin {
 				if(!$link->query("RENAME USER '".$link->escape_string($database_user)."'@'$db_host' TO '".$link->escape_string($database_rename_user)."'@'$db_host'")) $success = false;
 			} elseif($action == 'PASSWORD') {
 				//if(!$link->query("SET PASSWORD FOR '".$link->escape_string($database_user)."'@'$db_host' = '".$link->escape_string($database_password)."'")) $success = false;
-				// SET PASSWORD for already hashed passwords is not supported by latest MySQL 5.7 anymore, so we set it directly
+				// SET PASSWORD for already hashed passwords is not supported by latest MySQL 5.7 anymore, so we have to set the hashed password directly
 				if(trim($database_password) != '') {
-					if(!$link->query("UPDATE mysql.user SET `Password` = '".$link->escape_string($database_password)."' WHERE `Host` = '".$db_host."' AND `User` = '".$link->escape_string($database_user)."'")) $success = false;
+					// MySQL < 5.7 and MariadB 10
+					if(!$link->query("UPDATE mysql.user SET `Password` = '".$link->escape_string($database_password)."' WHERE `Host` = '".$db_host."' AND `User` = '".$link->escape_string($database_user)."'")) {
+						// MySQL 5.7, the Password field has been renamed to authentication_string
+						if(!$link->query("UPDATE mysql.user SET `authentication_string` = '".$link->escape_string($database_password)."' WHERE `Host` = '".$db_host."' AND `User` = '".$link->escape_string($database_user)."'")) $success = false;
+					}
 					if($success == true) $link->query("FLUSH PRIVILEGES");
 				}
 			}