<?xml version='1.0' encoding='utf-8'?>
<oval-def:oval_definitions xmlns:ind="http://oval.mitre.org/XMLSchema/oval-definitions-5#independent" xmlns:linux="http://oval.mitre.org/XMLSchema/oval-definitions-5#linux" xmlns:oval="http://oval.mitre.org/XMLSchema/oval-common-5" xmlns:oval-def="http://oval.mitre.org/XMLSchema/oval-definitions-5" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://oval.mitre.org/XMLSchema/oval-common-5 oval-common-schema.xsd  http://oval.mitre.org/XMLSchema/oval-definitions-5 oval-definitions-schema.xsd  http://oval.mitre.org/XMLSchema/oval-definitions-5#independent independent-definitions-schema.xsd  http://oval.mitre.org/XMLSchema/oval-definitions-5#unix unix-definitions-schema.xsd  http://oval.mitre.org/XMLSchema/oval-definitions-5#linux linux-definitions-schema.xsd">
  <oval-def:generator>
    <oval:product_name>OVALFileLinker from SCAP Security Guide</oval:product_name>
    <oval:product_version>ssg: [0, 1, 80], python: 3.10.12</oval:product_version>
    <oval:schema_version>5.11.2</oval:schema_version>
    <oval:timestamp>2026-01-26T22:10:23</oval:timestamp>
  </oval-def:generator>
  <oval-def:definitions>
    <oval-def:definition id="oval:ssg-ntp_single_service_active:def:1" version="1" class="compliance">
      <oval-def:metadata>
        <oval-def:title>Ensure a Single Time Synchronization Service is in Use</oval-def:title>
        <oval-def:affected family="unix">
          <oval-def:platform>Ubuntu 22.04</oval-def:platform>
        </oval-def:affected>
        <oval-def:reference ref_id="ntp_single_service_active" source="ssg" />
        <oval-def:description>Ensure a Single Time Synchronization Service is in Use</oval-def:description>
      </oval-def:metadata>
      <oval-def:criteria operator="AND">
        <oval-def:criterion comment="exactly one time synchronization service is active" test_ref="oval:ssg-test_ntp_single_service_active_single_active_timesync:tst:1" />
      </oval-def:criteria>
    </oval-def:definition>
  </oval-def:definitions>
  <oval-def:tests>
    <ind:variable_test id="oval:ssg-test_ntp_single_service_active_single_active_timesync:tst:1" version="1" check="all" comment="Verify exactly one time synchronization service is active" state_operator="AND">
      <ind:object object_ref="oval:ssg-obj_ntp_single_service_active_count:obj:1" />
      <ind:state state_ref="oval:ssg-ste_ntp_single_service_active_count:ste:1" />
    </ind:variable_test>
  </oval-def:tests>
  <oval-def:objects>
    <linux:systemdunitproperty_object id="oval:ssg-obj_ntp_single_service_active_timesync_services:obj:1" version="1" comment="All active time synchronization services">
      <linux:unit operation="pattern match">^(chrony|systemd-timesyncd).service$</linux:unit>
      <linux:property>ActiveState</linux:property>
      <oval-def:filter action="include">oval:ssg-ste_ntp_single_service_active_timesync_services:ste:1</oval-def:filter>
    </linux:systemdunitproperty_object>
    <ind:variable_object id="oval:ssg-obj_ntp_single_service_active_count:obj:1" version="1">
      <ind:var_ref>oval:ssg-var_ntp_single_service_active_timesync_active_count:var:1</ind:var_ref>
    </ind:variable_object>
  </oval-def:objects>
  <oval-def:states>
    <linux:systemdunitproperty_state id="oval:ssg-ste_ntp_single_service_active_timesync_services:ste:1" version="1" operator="AND">
      <linux:value>active</linux:value>
    </linux:systemdunitproperty_state>
    <ind:variable_state id="oval:ssg-ste_ntp_single_service_active_count:ste:1" version="1" operator="AND">
      <ind:value operation="equals" datatype="int">1</ind:value>
    </ind:variable_state>
  </oval-def:states>
  <oval-def:variables>
    <oval-def:local_variable id="oval:ssg-var_ntp_single_service_active_timesync_active_count:var:1" version="1" datatype="int" comment="Number of currently active time synchronization services">
      <oval-def:count>
        <oval-def:regex_capture pattern="^active$">
          <oval-def:object_component item_field="value" object_ref="oval:ssg-obj_ntp_single_service_active_timesync_services:obj:1" />
        </oval-def:regex_capture>
      </oval-def:count>
    </oval-def:local_variable>
  </oval-def:variables>
</oval-def:oval_definitions>