#!/bin/bash

#
# Security level implementation...
# Writen by Vandoorselaere Yoann <yoann@mandrakesoft.com>
#


if [[ -f /usr/share/msec/lib.sh ]]; then
    . /usr/share/msec/lib.sh
else
    echo "Can't find /usr/share/msec/lib.sh, exiting."
    exit 1
fi

clear

###
echo "Do you want all system events to be logged on tty12 ?"
WaitAnswer; clear
if [[ ${answer} == yes ]]; then
    AddRules "*.* /dev/tty12" /etc/syslog.conf
fi

###
echo "Do you want to only allow ctrl-alt-del if root is logged locally ?"
echo "( or if an user present in /etc/shutdown.allow is logged locally )"
WaitAnswer; clear
tmpfile=`mktemp /tmp/secure.XXXXXX`
cp /etc/inittab ${tmpfile}
if [[ ${answer} == yes ]]; then
    cat ${tmpfile} | \
    sed s'/ca::ctrlaltdel:\/sbin\/shutdown -t3 -r now/ca::ctrlaltdel:\/sbin\/shutdown -a -t3 -r now/' > /etc/inittab
else
    cat ${tmpfile} | \
    sed s'/ca::ctrlaltdel:\/sbin\/shutdown -a -t3 -r now/ca::ctrlaltdel:\/sbin\/shutdown -t3 -r now/' > /etc/inittab
fi
rm -f ${tmpfile}

###
echo "Do you want to deny any machine to connect to yours ?"
WaitAnswer
if [[ ${answer} == yes ]]; then
    echo "Do you want only localhost to be allowed ?"
    WaitAnswer; clear
    if [[ ${answer} == yes ]]; then
	AddRules "ALL:ALL EXCEPT localhost:DENY" /etc/hosts.deny
    else
	AddRules "ALL:ALL:DENY" /etc/hosts.deny
    fi
fi

###
echo "Do you want root console login to be allowed ?" 
WaitAnswer; clear
if [[ ${answer} == yes ]]; then
    AddRules "tty1" /etc/securetty quiet
    AddRules "tty2" /etc/securetty quiet
    AddRules "tty3" /etc/securetty quiet
    AddRules "tty4" /etc/securetty quiet
    AddRules "tty5" /etc/securetty quiet
    AddRules "tty6" /etc/securetty 
fi
###
echo "Do you want to enable the libsafe stack overflow protection ?"
echo "This stack overflow protection work by catching dangerous function call"
echo "like strcpy, strcat, getwd, gets, [vf]scanf, realpath, [v]sprintf"
echo "and verify the address & the size of the destination buffer in the stack"
echo "this is done by searching in the stack frame the one which contain the"
echo "destination address, and by substracting the frame address to the destination buffer one" 
WaitAnswer; clear
if [[ ${answer} == yes ]]; then
	AddRules "export LD_PRELOAD=/usr/lib/libsafe.so.1.2" /etc/profile
fi

###
echo "Do you want your system to daily check important security problem ?"
WaitAnswer; clear
if [[ ${answer} == yes ]]; then
	AddRules "CHECK_SECURITY=yes" /etc/security/msec/security.conf
        AddRules "0 0-23 * * *    root    nice --adjustment=+19 /usr/share/msec/security.sh" /etc/crontab
fi

###
echo "Do you want your system to daily check new open port listening ?"
WaitAnswer; clear
if [[ ${answer} == yes ]]; then
	AddRules "CHECK_OPEN_PORT=yes" /etc/security/msec/security.conf
	AddRules "0 0-23 * * *    root    nice --adjustment=+19 /usr/share/msec/security.sh" /etc/crontab
fi

###
echo "Do you want your system to check for grave permission problem on sensibles files ?"
WaitAnswer; clear
if [[ ${answer} == yes ]]; then
	AddRules "CHECK_PERMS=yes" /etc/security/msec/security.conf
	AddRules "0 0-23 * * *    root    nice --adjustment=+19 /usr/share/msec/security.sh" /etc/crontab
fi

###
echo "Do you want your system to daily check SUID Root file change ?"
WaitAnswer; clear
if [[ ${answer} == yes ]]; then
    AddRules "CHECK_SUID_ROOT=yes" /etc/security/msec/security.conf
    AddRules "0 0-23 * * *    root    nice --adjustment=+19 /usr/share/msec/security.sh" /etc/crontab
fi

###
echo "Do you want your system to daily check suid files md5 checksum changes ?"
WaitAnswer; clear
if [[ ${answer} == yes ]]; then
	AddRules "CHECK_SUID_MD5=yes" /etc/security/msec/security.conf
	AddRules "0 0-23 * * *    root    nice --adjustment=+19 /usr/share/msec/security.sh" /etc/crontab
fi

###
echo "Do you want your system to daily check SUID Group file change ?"
WaitAnswer; clear
if [[ ${answer} == yes ]]; then
    AddRules "CHECK_SUID_GROUP=yes" /etc/security/msec/security.conf
    AddRules "0 0-23 * * *    root    nice --adjustment=+19 /usr/share/msec/security.sh" /etc/crontab
fi

###
echo "Do you want your system to daily check Writeable file change ?"
WaitAnswer; clear
if [[ ${answer} == yes ]]; then
    AddRules "CHECK_WRITEABLE=yes" /etc/security/msec/security.conf
    AddRules "0 0-23 * * *    root    nice --adjustment=+19 /usr/share/msec/security.sh" /etc/crontab
fi

###
echo "Do you want your system to daily check Unowned file change ?"
WaitAnswer; clear
if [[ ${answer} == yes ]]; then
    AddRules "CHECK_UNOWNED=yes" /etc/security/msec/security.conf
    AddRules "0 0-23 * * *    root    nice --adjustment=+19 /usr/share/msec/security.sh" /etc/crontab
fi

###
echo "Do you want your system to verify every minutes if a network interface"
echo "is in promiscuous state (which mean someone is probably running a sniffer on your machine ) ?"
WaitAnswer; clear
if [[ ${answer} == yes ]]; then
    AddRules "CHECK_PROMISC=yes" /etc/security/msec/security.conf
    AddRules "*/1 * * * *    root    nice --adjustment=+19 /usr/share/msec/promisc_check.sh" /etc/crontab
fi
###

echo "Do you want security report to be done directly on the console ?"
WaitAnswer; clear
if [[ ${answer} == yes ]]; then
    AddRules "TTY_WARN=yes" /etc/security/msec/security.conf
else
    AddRules "TTY_WARN=no" /etc/security/msec/security.conf
fi
###

echo "Do you want security report to be done in syslog ?"
WaitAnswer; clear
if [[ ${answer} == yes ]]; then
    AddRules "SYSLOG_WARN=yes" /etc/security/msec/security.conf
else
    AddRules "SYSLOG_WARN=no" /etc/security/msec/security.conf
fi
###

echo "Do you want security report to be done by mail ?"
WaitAnswer; clear
if [[ ${answer} == yes ]]; then
    AddRules "MAIL_WARN=yes" /etc/security/msec/security.conf
else
    AddRules "MAIL_WARN=no" /etc/security/msec/security.conf
fi
###


LiloUpdate;
/sbin/lilo >& /dev/null

###
echo "Do you want to disable your running server ( except important one )"
echo "This is only valuable for server installed with rpm."
WaitAnswer; clear
if [[ ${answer} == yes ]]; then
	echo -n "Disabling all service, except : {"
	chkconfig --list | awk '{print $1}' | while read service; do
   		if grep -qx ${service} /etc/security/msec/server.4; then
       		echo -n " ${service}"
   		fi
	done
	echo " } : "

	chkconfig --list | awk '{print $1}' | while read service; do
    	chkconfig --del "${service}"
    	if ! chkconfig --msec --add "${service}"; then
       	 	echo -e "\t- Services ${service} is now disabled."
    	fi
	done
	echo -e "done.\n";
fi

###
echo "Do you want to disallow rpm to automatically enable a new installed server for run on next reboot ?"
echo "yes = you will need to chkconfig (--add ) servername for the server to run on boot."
echo "no  = rpm will do it for you, but you have less control of what is running on your machine."
WaitAnswer; clear
if [[ ${answer} == yes ]]; then
	export SECURE_LEVEL="4"
	AddRules "SECURE_LEVEL=\"4\"" /etc/profile
else
	AddRules "SECURE_LEVEL=\"3\"" /etc/profile
fi

###
echo "Do you want an easy, normal, restricted, or paranoid umask ?"
echo "easy ( 002 )   = user = rwx, group = rwx, other = rx"
echo "normal ( 022 ) = user = rwx, group = rx, other = rx"
echo "restricted ( for users ) ( 077 ) = user = rwx, group =, other ="
echo "restricted ( for root ) ( 022 ) = user = rwx, = group = rx, other = rx" 
echo "paranoid ( 077 ) = user = rwx, group = , other ="
answer="nothing"
while [[ "${answer}" != "easy" && "${answer}" != "normal" && "${answer}" != "restricted" && "${answer}" != "paranoid"  ]]; do
	echo -n "easy/normal/restricted/paranoid : "
    read answer
done
case "${answer}" in
	"easy")
	AddRules "umask 002" /etc/profile
	;;
	"normal")
	AddRules "umask 022" /etc/profile
	;;
	"restricted")
	AddRules "if [[ \${UID} == 0 ]]; then umask 022; else umask 077; fi" /etc/profile
	;;
	"paranoid")
	AddRules "umask 077" /etc/profile
	;;
esac

###
echo "Do you want a "." in your PATH variable ?"
echo "This permit you to not use ./progname & to just type progname"
echo "However this is a *high* security risk."
WaitAnswer; clear
if [[ ${answer} == yes ]]; then
    AddRules "PATH=\$PATH:/usr/X11R6/bin:/usr/games:." /etc/profile quiet
else
    AddRules "PATH=\$PATH:/usr/X11R6/bin:/usr/games" /etc/profile quiet
fi

AddRules "export PATH SECURE_LEVEL" /etc/profile