#!/bin/bash
#
# Copyright (C) 2018 Nikos Mavrogiannopoulos
#
# This file is part of ocserv.
#
# ocserv is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2 of the License, or (at
# your option) any later version.
#
# ocserv is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

# This tests operation/traffic under compression (lzs or lz4).

PKG_CONFIG="${PKG_CONFIG:-/usr/bin/pkg-config}"
OCCTL="${OCCTL:-../src/occtl/occtl}"
SERV="${SERV:-../src/ocserv}"
srcdir=${srcdir:-.}
PIDFILE=ocserv-pid.$$.tmp
CLIPID=oc-pid.$$.tmp
PATH=${PATH}:/usr/sbin
IP=$(which ip)
OUTFILE=traffic.$$.tmp
RADIUSLOG=radius-otp.$$.log
RADIUSD=$(which radiusd)

if test -z "${RADIUSD}";then
	RADIUSD=$(which freeradius)
fi

. `dirname $0`/common.sh

eval "${GETPORT}"

if test -z "${IP}";then
	echo "no IP tool is present"
	exit 77
fi

if test -z "${RADIUSD}";then
	echo "no radiusd is present"
	exit 77
fi

if test "$(id -u)" != "0";then
	echo "This test must be run as root"
	exit 77
fi

${PKG_CONFIG} --atleast-version=1.2.7 radcli
if test $? != 0;then
	echo "radcli version less than 1.2.7 does not support Access-Challenge server response"
	exit 77
fi

echo "Testing ocserv and radius (otp authentication)... "

function finish {
  set +e
  echo " * Cleaning up..."
  test -n "${PID}" && kill ${PID} >/dev/null 2>&1
  test -n "${RADIUSPID}" && kill ${RADIUSPID} >/dev/null 2>&1
  test -n "${PIDFILE}" && rm -f ${PIDFILE} >/dev/null 2>&1
  test -f "${CLIPID}" && kill $(cat ${CLIPID}) >/dev/null 2>&1
  test -n "${CLIPID}" && rm -f ${CLIPID} >/dev/null 2>&1
  test -n "${CONFIG}" && rm -f ${CONFIG} >/dev/null 2>&1
  rm -f ${OUTFILE} 2>&1
  test -f "${RADIUSLOG}" && cat "${RADIUSLOG}"
  rm -f "${RADIUSLOG}"
}
trap finish EXIT

# server address
. `dirname $0`/random-net.sh

# These must match the data/raddb/users:test-class user
VPNNET=192.168.55.0/24
VPNADDR=192.168.55.1
VPNNET6=fc7d:b139:f7ba:5f53:c634:e98e:b777:0/112
VPNADDR6=fc7d:b139:f7ba:5f53:c634:e98e:b777:1
OCCTL_SOCKET=./occtl-radius-otp-$$.socket

. `dirname $0`/ns.sh

${CMDNS2} ${IP} link set dev lo up

# Run servers
${CMDNS2} ${RADIUSD} -d ${srcdir}/data/raddb/ -s -xx -l ${RADIUSLOG} &
RADIUSPID=$!

update_config radius-otp.config
if test "$VERBOSE" = 1;then
DEBUG="-d 3"
fi

${CMDNS2} ${SERV} -p ${PIDFILE} -f -c ${CONFIG} ${DEBUG} & PID=$!

sleep 4

echo " * Connecting with correct password and OTP..."
USERNAME=test1-otp
( { echo "$USERNAME-stage"
for (( COUNT=1; COUNT <= 3; COUNT++ )); do
    sleep 0.5
    echo "$USERNAME-stage$COUNT"
done
} | ${CMDNS1} ${OPENCONNECT} ${ADDRESS}:${PORT} -u ${USERNAME} --servercert=pin-sha256:xp3scfzy3rOQsv9NcOve/8YVVv+pHr4qNCXEXrNl5s8= -s ${srcdir}/scripts/vpnc-script --pid-file=${CLIPID} -b >/dev/null 2>&1)
if test $? != 0; then
	echo "Could not connect to server"
	exit 1
fi

test "$VERBOSE" = 1 && ${OCCTL} -s ${OCCTL_SOCKET} show user ${USERNAME}
test "$VERBOSE" = 1 && ${OCCTL} -s ${OCCTL_SOCKET} show ip ban points
${OCCTL} -s ${OCCTL_SOCKET} unban ip ${CLI_ADDRESS} >/dev/null 2>&1

sleep 3

${CMDNS1} ${IP} addr show|grep $(echo ${VPNADDR}|cut -d '.' -f 1-3)
if test $? != 0; then
	${CMDNS1} ${IP} addr show
	echo "Did not find expected IP in VPN"
	exit 1
fi

${CMDNS1} ping -w 3 ${VPNADDR}
if test $? != 0; then
	echo "Could not ping server VPN IP"
	exit 1
fi

test -f "${CLIPID}" && kill $(cat ${CLIPID}) >/dev/null 2>&1
test -n "${CLIPID}" && rm -f ${CLIPID} >/dev/null 2>&1

sleep 3

echo " * Connecting with wrong username"
# Since MAX_PASSWORD_TRIES = 3, we try 3 attempts. In the ban system, it will accumulate 30 ban-points,
# which corresponds to the maximum value of ban-points by default. To distinguish the cause of access
# denial, option "max-ban-score = 40" explicitly set in the used configuration.
USERNAME=test0-otp
( {
for (( COUNT=1; COUNT <= 3; COUNT++ )); do
    sleep 0.5
    echo "$USERNAME-stage"
done
} | ${CMDNS1} ${OPENCONNECT} ${ADDRESS}:${PORT} -u ${USERNAME} --servercert=pin-sha256:xp3scfzy3rOQsv9NcOve/8YVVv+pHr4qNCXEXrNl5s8= -s ${srcdir}/scripts/vpnc-script --pid-file=${CLIPID} -b --cookieonly >/dev/null 2>&1)
if test $? == 0; then
	echo "Connected with wrong username"
	exit 1
fi

test "$VERBOSE" = 1 && ${OCCTL} -s ${OCCTL_SOCKET} show ip ban points
${OCCTL} -s ${OCCTL_SOCKET} unban ip ${CLI_ADDRESS} >/dev/null 2>&1

sleep 3

echo " * Connecting with wrong OTP"
USERNAME=test1-otp
( { echo "$USERNAME-stage"
for (( COUNT=1; COUNT <= 3; COUNT++ )); do
    sleep 0.5
    if [ $COUNT -eq 2 ]; then
        echo "$USERNAME-stage5"
    else
        echo "$USERNAME-stage$COUNT"
    fi
done
} | ${CMDNS1} ${OPENCONNECT} ${ADDRESS}:${PORT} -u ${USERNAME} --servercert=pin-sha256:xp3scfzy3rOQsv9NcOve/8YVVv+pHr4qNCXEXrNl5s8= -s ${srcdir}/scripts/vpnc-script --pid-file=${CLIPID} -b --cookieonly >/dev/null 2>&1)
if test $? == 0; then
	echo "Connected with wrong OTP"
	exit 1
fi

${OCCTL} -s ${OCCTL_SOCKET} unban ip ${CLI_ADDRESS} >/dev/null 2>&1

sleep 3

echo " * Connecting with empty password and wrong OTP... "
# Since MAX_PASSWORD_TRIES = 3, we only make the first attempt with a blank password, and enter the wrong OTP on third stage
USERNAME=test1-otp
( { echo ""
sleep 2
echo "$USERNAME-stage"
for (( COUNT=1; COUNT <= 3; COUNT++ )); do
    sleep 0.5
    if [ $COUNT -eq 3 ]; then
        echo "$USERNAME-stage5"
    else
        echo "$USERNAME-stage$COUNT"
    fi
done
} | ${CMDNS1} ${OPENCONNECT} ${ADDRESS}:${PORT} -u ${USERNAME} --servercert=pin-sha256:xp3scfzy3rOQsv9NcOve/8YVVv+pHr4qNCXEXrNl5s8= -s ${srcdir}/scripts/vpnc-script --pid-file=${CLIPID} -b --cookieonly >/dev/null 2>&1)
if test $? == 0; then
	echo "Connected with wrong OTP"
	exit 1
fi

${OCCTL} -s ${OCCTL_SOCKET} unban ip ${CLI_ADDRESS} >/dev/null 2>&1

sleep 3

echo " * Connecting with blank OTP... "
USERNAME=test1-otp
( { echo "$USERNAME-stage"
for (( COUNT=1; COUNT <= 3; COUNT++ )); do
    sleep 0.5
    if [ $COUNT -eq 3 ]; then
        echo -e "\n"
    else
        echo "$USERNAME-stage$COUNT"
    fi
done
} | ${CMDNS1} ${OPENCONNECT} ${ADDRESS}:${PORT} -u ${USERNAME} --servercert=pin-sha256:xp3scfzy3rOQsv9NcOve/8YVVv+pHr4qNCXEXrNl5s8= -s ${srcdir}/scripts/vpnc-script --pid-file=${CLIPID} -b --cookieonly >/dev/null 2>&1)
if test $? == 0; then
	echo "Connected with blank OTP"
	exit 1
fi

${OCCTL} -s ${OCCTL_SOCKET} unban ip ${CLI_ADDRESS} >/dev/null 2>&1

sleep 3

echo " * Connecting with wrong OTP; check banning with same stage password retries"
# Ban-points are summarized - for the wrong password and wrong OTP.
# For clarity, we send a wrong password and three wrong OTP - a total of 40 ban-points,
# which corresponds to the option "max-ban-score = 40" in the used configuration.
USERNAME=test3-otp
RETRY=0
( { echo ""
sleep 2
echo "$USERNAME-stage"
for (( COUNT=1; COUNT <= 3; COUNT++ )); do
    sleep 0.5
    if [ $COUNT -eq 2 ] && [ $RETRY -lt 3 ]; then
        echo "$USERNAME-stage5"
        (( COUNT-- ))
        (( RETRY++ ))
    else
        echo "$USERNAME-stage$COUNT"
    fi
done
} | ${CMDNS1} ${OPENCONNECT} ${ADDRESS}:${PORT} -u ${USERNAME} --servercert=pin-sha256:xp3scfzy3rOQsv9NcOve/8YVVv+pHr4qNCXEXrNl5s8= -s ${srcdir}/scripts/vpnc-script --pid-file=${CLIPID} -b --cookieonly >/dev/null 2>&1)
if test $? == 0; then
	echo "Successful connection with the number of OTP retries greater than allowed by the ban system (default 30)."
	${OCCTL} -s ${OCCTL_SOCKET} show ip ban points
	exit 1
fi
test "$VERBOSE" = 1 && ${OCCTL} -s ${OCCTL_SOCKET} show ip ban points
${OCCTL} -s ${OCCTL_SOCKET} unban ip ${CLI_ADDRESS} >/dev/null 2>&1

sleep 3

echo " * Check MAX_CHALLENGES=16 hard limit for password requests"
USERNAME=test2-otp
( { echo "${USERNAME}-stage"
for (( COUNT=1; COUNT <= 17; COUNT++ )); do
    sleep 0.5
    echo "$USERNAME-stage$COUNT"
done
} | ${CMDNS1} ${OPENCONNECT} ${ADDRESS}:${PORT} -u ${USERNAME} --servercert=pin-sha256:xp3scfzy3rOQsv9NcOve/8YVVv+pHr4qNCXEXrNl5s8= -s ${srcdir}/scripts/vpnc-script --pid-file=${CLIPID} -b --cookieonly >/dev/null 2>&1)
if test $? == 0; then
	echo "Connected to server - MAX_CHALLENGES test failed"
	exit 1
fi

sleep 3

exit 0