feat: add debian12 scripts

- nftables_is_enabled.sh 	-> 4.2.9
- nftables_has_table.sh 	-> 4.2.4
- nftables_has_base_chains.sh 	-> 4.2.5

bin/hardening/nftables_has_base_chains.sh

@@ -0,0 +1,94 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# Ensure nftables base chains exist (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 nftables base chains exist"
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    INPUT_CHAIN=1
+    OUTPUT_CHAIN=1
+    FORWARD_CHAIN=1
+
+    if nft list ruleset | grep 'hook input'; then
+        INPUT_CHAIN=0
+        ok "nft base input chain exist"
+    else
+        crit "nft base input chain does not exist"
+    fi
+
+    if nft list ruleset | grep 'hook output'; then
+        OUTPUT_CHAIN=0
+        ok "nft base output chain exist"
+    else
+        crit "nft base output chain does not exist"
+    fi
+
+    if nft list ruleset | grep 'hook forward'; then
+        FORWARD_CHAIN=0
+        ok "nft base forward chain exist"
+    else
+        crit "nft base forward chain does not exist"
+    fi
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    audit
+    if [ "$INPUT_CHAIN" -eq 1 ]; then
+        info "adding nft base input chain"
+        # shellcheck disable=1083
+        nft create chain inet filter input { type filter hook input priority 0 \; }
+    fi
+
+    if [ "$OUTPUT_CHAIN" -eq 1 ]; then
+        info "adding nft base output chain"
+        # shellcheck disable=1083
+        nft create chain inet filter output { type filter hook output priority 0 \; }
+    fi
+
+    if [ "$FORWARD_CHAIN" -eq 1 ]; then
+        info "adding nft base forward chain"
+        # shellcheck disable=1083
+        nft create chain inet filter forward { type filter hook forward priority 0 \; }
+    fi
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
+    . /etc/default/cis-hardening
+fi
+
+if [ -z "$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

bin/hardening/nftables_has_table.sh

@@ -0,0 +1,67 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# Ensure a nftables table exists (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 a nftables table exists"
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    NFTABLES_HAS_TABLES=0
+    local tables
+    tables=$(nft list tables | wc -l)
+    if [ "$tables" -eq 0 ]; then
+        crit "There are no nft tables"
+        NFTABLES_HAS_TABLES=1
+    else
+        ok "There are $tables nft tables"
+    fi
+
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    audit
+    if [ "$NFTABLES_HAS_TABLES" -eq 1 ]; then
+        info "Adding 'filter' nft table"
+        nft create table inet filter
+    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

bin/hardening/nftables_is_enabled.sh

@@ -0,0 +1,68 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# Ensure nftables service is enabled (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 nftables service is enabled"
+SERVICE="nftables.service"
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    SERVICE_ENABLED=1
+
+    is_service_enabled "$SERVICE"
+    if [ "$FNRET" -eq 0 ]; then
+        ok "$SERVICE is enabled"
+        SERVICE_ENABLED=0
+    else
+        crit "$SERVICE is not enabled"
+    fi
+
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    audit
+    if [ "$SERVICE_ENABLED" -ne 0 ]; then
+        manage_service unmask "$SERVICE"
+        manage_service enable "$SERVICE"
+    fi
+
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
+    . /etc/default/cis-hardening
+fi
+if [ -z "$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

tests/hardening/nftables_has_base_chains.sh

@@ -0,0 +1,11 @@
+# shellcheck shell=bash
+# run-shellcheck
+test_audit() {
+    # running on a non privilieged container, wont test much...
+    describe Running on blank host
+    register_test retvalshouldbe 1
+    dismiss_count_for_test
+    # shellcheck disable=2154
+    run blank "${CIS_CHECKS_DIR}/${script}.sh" --audit-all
+
+}

tests/hardening/nftables_has_table.sh

@@ -0,0 +1,11 @@
+# shellcheck shell=bash
+# run-shellcheck
+test_audit() {
+    # running on a non privilieged container, wont test much...
+    describe Running on blank host
+    register_test retvalshouldbe 1
+    dismiss_count_for_test
+    # shellcheck disable=2154
+    run blank "${CIS_CHECKS_DIR}/${script}.sh" --audit-all
+
+}

tests/hardening/nftables_is_enabled.sh

@@ -0,0 +1,10 @@
+# shellcheck shell=bash
+# run-shellcheck
+test_audit() {
+    describe Running on blank host
+    register_test retvalshouldbe 0
+    dismiss_count_for_test
+    # shellcheck disable=2154
+    run blank "${CIS_CHECKS_DIR}/${script}.sh" --audit-all
+
+}