feat: add new scripts for debian 12

- tftp_is_disabled              ->      2.1.16
- network_services_listening    ->      2.1.22
- use_time_sync                 ->      2.3.1.1
Update the existing script to check there is only one installed

- chrony_is_enabled_and_running ->      2.3.3.3

bin/hardening/chrony_is_enabled_and_running.sh

@@ -0,0 +1,91 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# Ensure chrony is enabled and running (Automated)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+# shellcheck disable=2034
+HARDENING_LEVEL=3
+# shellcheck disable=2034
+DESCRIPTION="Ensure chrony is enabled and running."
+PACKAGE="chrony"
+SERVICE="chrony"
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    CHRONY_INSTALLED=0
+    CHRONY_ENABLED=0
+    CHRONY_RUNNING=0
+
+    is_pkg_installed "$PACKAGE"
+    if [ "$FNRET" -ne 0 ]; then
+        CHRONY_INSTALLED=1
+        crit "chrony is not installed"
+    fi
+    # no package, no need to check further
+    return
+
+    is_service_enabled "$SERVICE"
+    if [ "$FNRET" -ne 0 ]; then
+        CHRONY_INSTALLED=1
+        crit "chrony is not enabled"
+    fi
+
+    is_service_active "$SERVICE"
+    if [ "$FNRET" -ne 0 ]; then
+        CHRONY_RUNNING=1
+        crit "chrony is not running"
+    fi
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    audit
+    if [ "$CHRONY_INSTALLED" -eq 1 ]; then
+        warn "Please install chrony manually to ensure only one time synchronization system is installed"
+    fi
+
+    if [ "$CHRONY_ENABLED" -eq 1 ]; then
+        info "Enablign chrony service"
+        manage_service "enable" "$SERVICE"
+    fi
+
+    if [ "$CHRONY_RUNNING" -eq 1 ]; then
+        info "Starting chrony service"
+        manage_service "start" "$SERVICE"
+    fi
+
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
+    . /etc/default/cis-hardening
+fi
+if [ -z "$CIS_LIB_DIR" ]; then
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "Cannot source CIS_LIB_DIR variable, aborting."
+    exit 128
+fi
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+if [ -r "${CIS_LIB_DIR}"/main.sh ]; then
+    # shellcheck source=../../lib/main.sh
+    . "${CIS_LIB_DIR}"/main.sh
+else
+    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_LIB_DIR in /etc/default/cis-hardening"
+    exit 128
+fi