feat: add debian12 scripts

ufw_is_installed.sh				-> 4.1.1
iptables_persistent_is_not_installed.sh		-> 4.1.2
ufw_is_enabled					-> 4.1.3
nftables_is_not_installed.sh 			-> 4.3.1.2
libpam_runtime_is_version 			-> 5.3.1.1

bin/hardening/ufw_is_installed.sh

@@ -0,0 +1,73 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# Ensure ufw is installed (Automated)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+# shellcheck disable=2034
+HARDENING_LEVEL=2
+# shellcheck disable=2034
+DESCRIPTION="Ensure ufw is installed."
+
+PACKAGE='ufw'
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    is_pkg_installed "$PACKAGE"
+    if [ "$FNRET" -eq 0 ]; then
+        ok "$PACKAGE is installed"
+    else
+        crit "$PACKAGE is not installed"
+    fi
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    is_pkg_installed "$PACKAGE"
+    if [ "$FNRET" -ne 0 ]; then
+        # "iptables-persistent" is gonna be removed by ufw installation
+        # if present, let the user manually chose the best decision based on his needs
+        info "checking for 'iptables-persistent' installation"
+        is_pkg_installed iptables-persistent
+        if [ "$FNRET" -eq 0 ]; then
+            crit "'iptables-persistent' is gonna be removed by 'ufw' installation. Either disable this recommendation, or manually remove 'iptables-persistent'"
+        else
+            info "Installing $PACKAGE"
+            apt_install "$PACKAGE"
+        fi
+    fi
+    audit
+}
+
+# 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