I'm afraid we hit the limitation of OVAL specification:
The required object_ref attribute provides a reference to an existing
OVAL Object declaration. The referenced OVAL Object specifies a set of OVAL
Items to collect. Note that an OVAL Object might identify 0, 1, or many
OVAL Items on a system. If no items are found on the system then an error
should be reported when determining the value of an ObjectComponentType. If
1 or more OVAL Items are found then each OVAL Item will be considered and
the ObjectComponentType may have one or more values.
I think that the workaround could be that the regular expression always
matches at least an empty string. Then I think the variable will not be
empty but it would contain an item that contains an empty string, so the
concatenation could proceed. I haven't tried it if it works, though.
On Fri, May 31, 2019 at 3:26 PM Ilya Okomin <ilya.okomin(a)oracle.com> wrote:
I need some piece of advice how to implement join in OVAL for variables if
some of them are empty .
I'm looking at the existing example from master which uses
<concat>-<split>. However this code doesn't work as expected for empty
variable var_rfg_include_config_regex in <concat> - returned result "no
value", while expected would be "%^/etc/rsyslog.conf$":
looks more applicable here, but it doesn't work as well with the same
reason - returned result is "no value" when one of variables is empty.
Can any approach be suggested to avoid getting "no value" and return
expected result for sample var_rfg_all_log_files_as_string_regex variable
(with joined values from defined only variables/objects)?
Open-scap-list mailing list
Security Technologies | Red Hat, Inc.