#!/bin/bash

#
# harbian-audit for Debian GNU/Linux 7/8/9/10 or CentOS Hardening
#

#
# 7.4.4 Create /etc/hosts.deny (Scored)
#

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

HARDENING_LEVEL=3

FILE='/etc/hosts.deny'
PATTERN='ALL: ALL'

# This function will be called if the script status is on enabled / audit mode
audit () {
	is_centos_8
	if [ $FNRET == 0 ]; then
		tcp_wrappers_warn			
		ok "So PASS."
		return 0
	else
    	does_file_exist $FILE
    	if [ $FNRET != 0 ]; then
        	crit "$FILE does not exist"
    	else
        	ok "$FILE exists, checking configuration"
        	does_pattern_exist_in_file $FILE "$PATTERN"
        	if [ $FNRET != 0 ]; then
            	crit "$PATTERN is not present in $FILE, we have to deny everything"
        	else	
            	ok "$PATTERN is present in $FILE"
        	fi
    	fi
	fi
}

# This function will be called if the script status is on enabled mode
apply () {
	is_centos_8
	if [ $FNRET == 0 ]; then
		tcp_wrappers_warn			
		ok "So PASS."
		return 0
	else
    	does_file_exist $FILE
    	if [ $FNRET != 0 ]; then
        	warn "$FILE does not exist, creating it"
        	touch $FILE
    	else
        	ok "$FILE exists"
    	fi
    	does_pattern_exist_in_file $FILE "$PATTERN"
    	if [ $FNRET != 0 ]; then
        	crit "$PATTERN is not present in $FILE, we have to deny everything"
        	add_end_of_file $FILE "$PATTERN"
        	warn "YOU MAY HAVE CUT YOUR ACCESS, CHECK BEFORE DISCONNECTING"
    	else
        	ok "$PATTERN is present in $FILE"
    	fi
	fi
}

# 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