#!/bin/bash

#
# harbian audit 7/8/9  Hardening
#

#
# 6.4 Ensure DHCP Server is not enabled (Scored)
#

set -e # One error, it's over
set -u # One variable unset, it's over

HARDENING_LEVEL=3
HARDENING_EXCEPTION=dhcp

PACKAGES='udhcpd isc-dhcp-server'

# This function will be called if the script status is on enabled / audit mode
audit () {
    for PACKAGE in $PACKAGES; do
        is_pkg_installed $PACKAGE
        if [ $FNRET = 0 ]; then
            if [ $ISEXCEPTION -eq 1 ]; then
                warn "$PACKAGE is installed! But Exception is set to 1, so it's pass!"
            else
                crit "$PACKAGE is installed!"
            fi
        else
            ok "$PACKAGE is absent"
        fi
    done
}

# This function will be called if the script status is on enabled mode
apply () {
    for PACKAGE in $PACKAGES; do
        is_pkg_installed $PACKAGE
        if [ $FNRET = 0 ]; then
            if [ $ISEXCEPTION -eq 1 ]; then
                warn "$PACKAGE is installed! But the exception is set to true, so don't need any operate."
            else
                crit "$PACKAGE is installed, purging it"
                apt-get purge $PACKAGE -y
                apt-get autoremove
            fi
        else
            ok "$PACKAGE is absent"
        fi
    done
}

# This function will create the config file for this check with default values
create_config() {
cat <<EOF
status=disabled
# Put here exception to pass this case, if set is 1, don't need apply, let to pass.
ISEXCEPTION=0
EOF
}

# This function will check config parameters required
check_config() {
    :
}

# Source Root Dir Parameter
if [ -r /etc/default/cis-hardening ]; then
    . /etc/default/cis-hardening
fi
if [ -z "$CIS_ROOT_DIR" ]; then
     echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
     echo "Cannot source CIS_ROOT_DIR variable, aborting."
    exit 128
fi

# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
    . $CIS_ROOT_DIR/lib/main.sh
else
    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
    exit 128
fi