Subversion Repositories ALCASAR

#/bin/bash

# $Id: alcasar-bl.sh 2187 2017-04-27 22:18:45Z richard $

# alcasar-bl.sh

# by Franck BOUIJOUX and Richard REY

# This script is distributed under the Gnu General Public License (GPL)

# Gestion de la BL pour le filtrage de domaine (via dnsmasq) et d'URL (via Dansguardian)

# Manage the BL for DnsBlackHole (dnsmasq) and URL filtering (Dansguardian)

DIR_CONF="/usr/local/etc"

CONF_FILE="$DIR_CONF/alcasar.conf"

private_ip_mask=`grep PRIVATE_IP= $CONF_FILE|cut -d"=" -f2`

private_ip_mask=${private_ip_mask:=192.168.182.1/24}

PRIVATE_IP=`echo $private_ip_mask | cut -d"/" -f1`			# ALCASAR LAN IP address

DIR_tmp="/tmp/blacklists"

DIR_WL_tmp="/tmp/whitelists"

FILE_tmp="/tmp/filesfilter.txt"

FILE_ip_tmp="/tmp/filesipfilter.txt"

DIR_DG="/etc/dansguardian/lists"

DIR_DG_BL="$DIR_DG/blacklists"

BL_CATEGORIES="$DIR_CONF/alcasar-bl-categories"				# list of names of the 	BL categories

WL_CATEGORIES="$DIR_CONF/alcasar-wl-categories"				#	'	'	WL categories

BL_CATEGORIES_ENABLED="$DIR_CONF/alcasar-bl-categories-enabled"		#	'	'	BL enabled categories

WL_CATEGORIES_ENABLED="$DIR_CONF/alcasar-wl-categories-enabled"		#	'	'	WL enabled categories

DIR_SHARE="/usr/local/share"

DIR_DNS_BL="$DIR_SHARE/dnsmasq-bl"					# all the BL in the DNSMASQ format

DIR_DNS_WL="$DIR_SHARE/dnsmasq-wl"					# all the WL	'	'	'

DIR_IP_BL="$DIR_SHARE/iptables-bl"					# all the IP addresses of the BL 

DIR_IP_WL="$DIR_SHARE/iptables-wl"					# IP ossi disabled WL 

DIR_DNS_BL_ENABLED="$DIR_SHARE/dnsmasq-bl-enabled"			# symbolic link to the domains BL (only enabled categories)

DIR_DNS_WL_ENABLED="$DIR_SHARE/dnsmasq-wl-enabled"			#	'	'	'	WL	'	'

DIR_IP_BL_ENABLED="$DIR_SHARE/iptables-bl-enabled"			#	'	'	ip BL (only enabled categories)

DIR_IP_WL_ENABLED="$DIR_SHARE/iptables-wl-enabled"			#	'	'	ip WL (ossi and ossi-* imported from ACC)

DNS1=`grep "DNS1" $CONF_FILE | cut -d '=' -f 2` 			# server DNS1 (for WL domain names)

BL_SERVER="dsi.ut-capitole.fr"

SED="/bin/sed -i"

# enable/disable the BL & WL categories

function cat_choice (){

	mkdir -p $DIR_tmp

	for LIST in $DIR_IP_BL_ENABLED $DIR_DNS_BL_ENABLED $DIR_IP_WL_ENABLED $DIR_DNS_WL_ENABLED

	do

		if [ ! -e $LIST ] #  only on install stage

		then

			mkdir $LIST

		else

			rm -rf $LIST/*

		fi

		chown root:apache $LIST

		chmod 770 $LIST

	done

	# update categories with rsync

	if [ ! -e $DIR_CONF/update_cat.conf ]

	then

		touch $DIR_CONF/update_cat.conf

		chown root:apache $DIR_CONF/update_cat.conf

		chmod 660 $DIR_CONF/update_cat.conf

	fi

	$SED "/\.Include/d" $DIR_DG/bannedsitelist $DIR_DG/bannedurllist # cleaning for DG

	$SED "s?^[^#]?#&?g" $BL_CATEGORIES $WL_CATEGORIES # cleaning BL & WL categories file (comment all lines)

	# process the file $BL_CATEGORIES with the choice of categories 

	for ENABLE_CATEGORIE in `cat $BL_CATEGORIES_ENABLED` 

	do

		$SED "/\/$ENABLE_CATEGORIE$/d" $BL_CATEGORIES 

		$SED "1i\/etc\/dansguardian\/lists\/blacklists\/$ENABLE_CATEGORIE" $BL_CATEGORIES

		ln -sf $DIR_DNS_BL/$ENABLE_CATEGORIE.conf $DIR_DNS_BL_ENABLED/$ENABLE_CATEGORIE

		ln -sf $DIR_IP_BL/$ENABLE_CATEGORIE $DIR_IP_BL_ENABLED/$ENABLE_CATEGORIE

		# echo ".Include<$DIR_DG_BL/$ENABLE_CATEGORIE/domains>" >> $DIR_DG/bannedsitelist  # Blacklisted domains are managed by dnsmasq

		echo ".Include<$DIR_DG_BL/$ENABLE_CATEGORIE/urls>" >> $DIR_DG/bannedurllist

	done

	sort +0.0 -0.2 $BL_CATEGORIES -o $FILE_tmp

	mv $FILE_tmp $BL_CATEGORIES

	chown root:apache $BL_CATEGORIES

	chmod 660 $BL_CATEGORIES

# process the file $WL_CATEGORIES with the choice of categories 

	for ENABLE_CATEGORIE in `cat $WL_CATEGORIES_ENABLED` 

	do

		$SED "/\/$ENABLE_CATEGORIE$/d" $WL_CATEGORIES 

		$SED "1i\/etc\/dansguardian\/lists\/blacklists\/$ENABLE_CATEGORIE" $WL_CATEGORIES

		ln -sf $DIR_DNS_WL/$ENABLE_CATEGORIE.conf $DIR_DNS_WL_ENABLED/$ENABLE_CATEGORIE

	done

	sort +0.0 -0.2 $WL_CATEGORIES -o $FILE_tmp

	mv $FILE_tmp $WL_CATEGORIES

	chown root:apache $WL_CATEGORIES

	chmod 660 $WL_CATEGORIES

}

usage="Usage: alcasar-bl.sh { -cat_choice or --cat_choice } | { -download or --download } | { -adapt or --adapt } | { -reload or --reload } | { -update_cat or --update_cat }"

nb_args=$#

args=$1

if [ $nb_args -eq 0 ]

then

	  args="-h"

fi

case $args in

	-\? | -h* | --h*)

		echo "$usage"

		exit 0

		;;

	# Retrieve Toulouse University BL

	-download | --download)

		rm -rf /tmp/con_ok.html

		`/usr/bin/curl $BL_SERVER -# -o /tmp/con_ok.html`

		if [ ! -e /tmp/con_ok.html ]

		then

			echo "Erreur : le serveur de blacklist ($BL_SERVER) n'est pas joignable"

		else 

			rm -rf /tmp/con_ok.html $DIR_tmp

			mkdir $DIR_tmp

			wget -P $DIR_tmp http://$BL_SERVER/blacklists/download/blacklists.tar.gz

			md5sum $DIR_tmp/blacklists.tar.gz | cut -d" " -f1 > $DIR_tmp/md5sum

			chown -R apache:apache $DIR_tmp

		fi

		;;		

	# enable/disable categories (used only during the alcasar install process)

	-cat_choice | --cat_choice)

		cat_choice

		;;

	# Adapt Toulouse University BL to ALCASAR architecture (dnsmasq + DG + iptables)

	-adapt | --adapt)

		echo -n "Adaptation process of Toulouse University blackList. Please wait : "

		if [ -f $DIR_tmp/blacklists.tar.gz ] # when downloading the last version of the BL

		then

			# keep custom files (ossi) 

			for x in $(ls -1 $DIR_DG_BL | grep "^ossi-*")

			do

				mv $DIR_DG_BL/$x $DIR_tmp

			done

			rm -rf $DIR_DG_BL $DIR_IP_BL

			mkdir $DIR_DG_BL $DIR_IP_BL

			tar zxf $DIR_tmp/blacklists.tar.gz --directory=$DIR_DG/

			chown -R root:apache $DIR_DG

			chmod -R 770 $DIR_DG

			# Add the two local categories (ossi-bl & ossi-wl) to the usage file

			# Add the custom categories (ossi-tor_nodes) to the usage file

			cat << EOF >> $DIR_DG_BL/global_usage 

NAME: ossi-bl

DEFAULT_TYPE: black

SOURCE: ALCASAR Team

DESC FR: sites blacklistés ajoutés localement

DESC EN: blacklisted sites add locally

NAME FR: ossi-bl

NAME EN: ossi-bl

NAME: ossi-wl

DEFAULT_TYPE: white

SOURCE: ALCASAR Team

DESC FR: sites autorisés ajoutés localement

DESC EN: whitelisted sites add locally

NAME FR: ossi-wl

NAME EN: ossi-wl

NAME: ossi-bl-tor_nodes

DEFAULT_TYPE: black

SOURCE: ALCASAR Team

DESC FR: Adresses IP des noeuds (routeurs) d'entrée du réseau TOR

DESC EN: IP addresses of input TOR nodes (routers)

NAME FR: Noeuds TOR

NAME EN: TOR nodes

EOF

			# Retrieve custom files (ossi)

			for x in $(ls -1 $DIR_tmp | grep "^ossi-*")

			do

				mv $DIR_tmp/$x $DIR_DG_BL

			done

		fi

		rm -f $BL_CATEGORIES $WL_CATEGORIES

		rm -rf $DIR_DNS_BL $DIR_DNS_WL $DIR_IP_BL $DIR_IP_WL

		rm -rf $DIR_DNS_BL_ENABLED $DIR_DNS_WL_ENABLED $DIR_IP_BL_ENABLED $DIR_IP_WL_ENBALED

		touch $BL_CATEGORIES $WL_CATEGORIES

		mkdir $DIR_DNS_BL $DIR_DNS_WL $DIR_IP_BL $DIR_IP_WL

		mkdir $DIR_DNS_BL_ENABLED $DIR_DNS_WL_ENABLED $DIR_IP_BL_ENABLED $DIR_IP_WL_ENBALED

		find $DIR_DG_BL/ -type f -name domains > $FILE_tmp # retrieve directory name where a domain file exist

		$SED "s?\/domains??g" $FILE_tmp # remove "/domains" suffix

		for dir_categorie in `cat $FILE_tmp` # create the blacklist and the whitelist files

		do

			categorie=`echo $dir_categorie|cut -d "/" -f6`

			categorie_type=`grep -A1 ^NAME:[$' '$'\t']*$categorie$ $DIR_DG_BL/global_usage | grep ^DEFAULT_TYPE | cut -d":" -f2 | tr -d " \t"`

			if [ "$categorie_type" == "white" ]

			then

				echo "$dir_categorie" >> $WL_CATEGORIES 

			else

				echo "$dir_categorie" >> $BL_CATEGORIES

			fi

		done

		rm -f $FILE_tmp

		# Verify that the enabled categories are effectively in the BL (need after an update of the BL)

		for ENABLE_CATEGORIE in `cat $BL_CATEGORIES_ENABLED` 

		do

			ok=`grep /$ENABLE_CATEGORIE$ $BL_CATEGORIES|wc -l`

			if [ $ok != "1" ] 

			then

				$SED "/^$ENABLE_CATEGORIE$/d" $BL_CATEGORIES_ENABLED

			fi

		done

		# Verify that the enabled categories are effectively in the WL (need after an update of the WL)

		for ENABLE_CATEGORIE in `cat $WL_CATEGORIES_ENABLED` 

		do

			ok=`grep /$ENABLE_CATEGORIE$ $WL_CATEGORIES|wc -l`

			if [ $ok != "1" ] 

			then

				$SED "/^$ENABLE_CATEGORIE$/d" $WL_CATEGORIES_ENABLED

			fi

		done

		# Creation of DNSMASQ and Iptables BL and WL

		for LIST in $BL_CATEGORIES $WL_CATEGORIES	# for each list (bl and wl)

		do

			for PATH_FILE in `cat $LIST` # for each category

			do

				DOMAIN=`basename $PATH_FILE`

				echo -n "$DOMAIN, "

		  		if [ ! -f $PATH_FILE/urls ] # create 'urls' file if it doesn't exist

				then

					touch $PATH_FILE/urls

					chown dansguardian:apache $PATH_FILE/urls

				fi

				$SED "/[äâëêïîöôüû@]/d" $FILE_tmp

				$SED "/^#.*/d" $FILE_tmp

				$SED "s/\.\{2,10\}/\./g" $PATH_FILE/domains $PATH_FILE/urls # correct some syntax errors

				# extract ip addresses for iptables

				awk '/^([0-9]{1,3}\.){3}[0-9]{1,3}$/{print "add bl_ip_blocked " $0}' $PATH_FILE/domains > $FILE_ip_tmp

				# for dnsmask, remove IP addesses, accented characters and commented lines.

				egrep  -v "^([0-9]{1,3}\.){3}[0-9]{1,3}$" $PATH_FILE/domains > $FILE_tmp

				if [ "$LIST" == "$BL_CATEGORIES" ]

				then

					# adapt to the dnsmasq syntax for the blacklist

					$SED "s?.*?address=/&/$PRIVATE_IP?g" $FILE_tmp 

					mv $FILE_tmp $DIR_DNS_BL/$DOMAIN.conf

					mv $FILE_ip_tmp $DIR_IP_BL/$DOMAIN

				else

					# adapt to the dnsmasq syntax for the whitelist

					$SED "s?.*?server=/&/$DNS1?g" $FILE_tmp 

					mv $FILE_tmp $DIR_DNS_WL/$DOMAIN.conf

				fi

			done

		done

		echo

		chown -R root:apache $BL_CATEGORIES $WL_CATEGORIES $BL_CATEGORIES_ENABLED $WL_CATEGORIES_ENABLED $DIR_DNS_BL $DIR_DNS_WL $DIR_IP_BL $DIR_IP_WL

	       	chmod 770 $DIR_DNS_BL $DIR_DNS_WL $DIR_IP_BL $DIR_IP_WL

		chmod -f 660 $BL_CATEGORIES $WL_CATEGORIES $BL_CATEGORIES_ENABLED $WL_CATEGORIES_ENABLED $DIR_DNS_BL/* $DIR_DNS_WL/* $DIR_IP_BL/* $DIR_IP_WL/*

		rm -f $FILE_tmp $FILE_ip_tmp

		rm -rf $DIR_tmp

		;;

	# update the categories which are written in "/usr/local/etc/update_cat.conf" with rsync

	-update_cat | --update_cat)

		if [ $(cat /usr/local/etc/update_cat.conf | wc -l) -ne 0 ]

		then

			echo -n "Updating categories in /usr/local/etc/update_cat.conf ..."

			cat /usr/local/etc/update_cat.conf | while read LIGNE_RSYNC

			do

				CATEGORIE=$(echo $LIGNE_RSYNC | cut -d' ' -f1)

				URL=$(echo $LIGNE_RSYNC | cut -d' ' -f2)

				PATH_FILE=$(find $DIR_DG_BL/ -type d -name $CATEGORIE) # retrieve directory name of the category

				rsync -rv $URL $(dirname $PATH_FILE ) #rsync inside of the blacklist directory

				# Creation of DNSMASQ and Iptables BL and WL

				DOMAIN=$(basename $PATH_FILE)

				$SED "s/\.\{2,10\}/\./g" $PATH_FILE/domains $PATH_FILE/urls # correction 'coma' instead of 'dot'

				$SED "/^$/d" $PATH_FILE/domains $PATH_FILE/urls # remove empty lines

				# extract ip addresses for iptables

				awk '/^([0-9]{1,3}\.){3}[0-9]{1,3}$/{print "add bl_ip_blocked " $0}' $PATH_FILE/domains > $FILE_ip_tmp

				# for dnsmask, remove IP addresses, accentuated characters and commented lines.

				egrep  -v "^([0-9]{1,3}\.){3}[0-9]{1,3}$" $PATH_FILE/domains > $FILE_tmp

				$SED "/[äâëêïîöôüû@]/d" $FILE_tmp

				$SED "/^#.*/d" $FILE_tmp

				black=`grep black $PATH_FILE/usage |wc -l`

				if [ $black == "1" ]

				then

					# adapt to the dnsmasq syntax for the blacklist

					$SED "s?.*?address=/&/$PRIVATE_IP?g" $FILE_tmp 

					mv $FILE_tmp $DIR_DNS_BL/$DOMAIN.conf

					mv $FILE_ip_tmp $DIR_IP_BL/$DOMAIN

				else

					# adapt to the dnsmasq syntax for the whitelist

					$SED "s?.*?server=/&/$DNS1?g" $FILE_tmp 

					mv $FILE_tmp $DIR_DNS_WL/$DOMAIN.conf

					mv $FILE_ip_tmp $DIR_IP_WL/$DOMAIN

				fi

				rm -f $FILE_tmp $FILE_ip_tmp

			done

			/usr/bin/systemctl restart dnsmasq-whitelist

			/usr/bin/systemctl restart dnsmasq-blacklist

			/usr/bin/systemctl restart dansguardian

			/usr/local/bin/alcasar-iptables.sh

		else

			  echo -n "/usr/local/etc/update_cat.conf is empty ..."

		fi

		echo 

		;;

	# reload when selected categories are changed or when ossi change his custom files

	-reload | --reload)

		# for DG

		cat_choice

		#  for dnsmasq (rehabited domain names)

		if [ `wc -w $DIR_DG/exceptionsitelist|cut -d " " -f1` != "0" ]

		then

			for i in `cat $DIR_DG/exceptionsitelist`

			do

				$SED "/$i/d" $DIR_DNS_BL/*

			done

		fi

		# adapt OSSI BL & WL custom files

		for dir in $DIR_DNS_BL_ENABLED $DIR_DNS_WL_ENABLED $DIR_IP_BL_ENABLED $DIR_IP_WL_ENBALED $DIR_DNS_BL $DIR_DNS_WL $DIR_IP_BL $DIr_IP_WL

		do

			rm -f $dir/ossi*

		done

		find $DIR_DG_BL/ -type f -name domains | grep ossi- > $FILE_tmp # retrieve ossi directories name where a domain file exist

		$SED "s?\/domains??g" $FILE_tmp # remove "/domains" suffix

		#retrieve max Top Level Domain for domain name synthax

		MAX_TLD=$(curl http://data.iana.org/TLD/tlds-alpha-by-domain.txt | grep -v '-' | grep -v '#' | wc -L)

		if [ $(echo $MAX_TLD | wc -c) -eq 0 ];then

			MAX_TLD=18

		fi

		for ossi_custom_dir in `cat $FILE_tmp` # create the blacklist and the whitelist files

		do

			ossi_categorie=`echo $ossi_custom_dir|cut -d "/" -f6`

			short_categorie=`echo "$ossi_categorie" | cut -d"-" -f2`

			if [ $short_categorie == "bl" ]

			then

				categorie_type="black"

			else

				categorie_type="white"

			fi

			$SED "s/\.\{2,10\}/\./g" $ossi_custom_dir/domains $ossi_custom_dir/urls # correction 'coma' instead of 'dot'

			$SED "/^$/d" $ossi_custom_dir/domains $ossi_custom_dir/urls # remove empty lines

			$SED "s/\r//" $ossi_custom_dir/domains $ossi_custom_dir/urls # remove Windows <CR>

			# extract ip addresses for iptables

			awk '/^([0-9]{1,3}\.){3}[0-9]{1,3}$/{print "add bl_ip_blocked " $0}' $ossi_custom_dir/domains > $FILE_ip_tmp

 			egrep  -v "^([0-9]{1,3}\.){3}[0-9]{1,3}$" $ossi_custom_dir/domains > $FILE_tmp

# search for correction	egrep "([a-zA-Z0-9_-.]+\.){1,2}[a-zA-Z]{2,$MAX_TLD}" $ossi_custom_dir/domains > $FILE_tmp

			if [ $categorie_type == "white" ]

			then

			# adapt the file to the dnsmasq syntax and enable it if needed

			# for the WL

				$SED "s?.*?server=/&/$DNS1?g" $FILE_tmp 

				mv $FILE_tmp $DIR_DNS_WL/$ossi_categorie.conf

				mv $FILE_ip_tmp $DIR_IP_WL/$ossi_categorie

				enabled=`grep ^$ossi_categorie$ $WL_CATEGORIES_ENABLED | wc -l`

				if [ $enabled == "1" ]

				then

					$SED "/\/$ossi_categorie$/d" $WL_CATEGORIES 

					$SED "1i\/etc\/dansguardian\/lists\/blacklists\/$ossi_categorie" $WL_CATEGORIES

					ln -sf $DIR_DNS_WL/$ossi_categorie.conf $DIR_DNS_WL_ENABLED/$ossi_categorie

					ln -sf $DIR_IP_WL/$ossi_categorie $DIR_IP_WL_ENABLED/$ossi_categorie

				fi

			else

			# for the BL

				$SED "s?.*?address=/&/$PRIVATE_IP?g" $FILE_tmp 

				mv $FILE_tmp $DIR_DNS_BL/$ossi_categorie.conf

				mv $FILE_ip_tmp $DIR_IP_BL/$ossi_categorie

				enabled=`grep ^$ossi_categorie$ $BL_CATEGORIES_ENABLED | wc -l`

				if [ $enabled == "1" ]

				then

					$SED "/\/$ossi_categorie$/d" $BL_CATEGORIES 

					$SED "1i\/etc\/dansguardian\/lists\/blacklists\/$ossi_categorie" $BL_CATEGORIES

					ln -sf $DIR_DNS_BL/$ossi_categorie.conf $DIR_DNS_BL_ENABLED/$ossi_categorie

					ln -sf $DIR_IP_BL/$ossi_categorie $DIR_IP_BL_ENABLED/$ossi_categorie

				fi

			fi

		done

		for file in $BL_CATEGORIES $BL_CATEGORIES_ENABLED $WL_CATEGORIES $WL_CATEGORIES_ENABLED

		do

			sort +0.0 -0.2 $file -o $FILE_tmp

			mv $FILE_tmp $file

			chown root:apache $file

			chmod 660 $file

		done

		chown -R root:apache $DIR_DNS_BL $DIR_DNS_WL $DIR_IP_BL $DIR_IP_WL

		chmod 660 $DIR_DNS_BL/* $DIR_DNS_WL/* $DIR_IP_BL/* $DIR_IP_WL/*

		if [ "$PARENT_SCRIPT" != "alcasar-conf.sh" ] # don't launch on install stage

		then

			/usr/bin/systemctl restart dnsmasq-blacklist

			/usr/bin/systemctl restart dnsmasq-whitelist

			/usr/local/bin/alcasar-iptables.sh

		fi

		;;

	*)

		echo "Argument inconnu :$1";

		echo "$usage"

		exit 1

		;;

esac