#!/bin/bash

# vim: dict+=/usr/share/beakerlib/dictionary.vim cpt=.,w,b,u,t,i,k

# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

#

#   runtest.sh of /CoreOS/openssh/Sanity/port-forwarding

#   Description: Testing port forwarding (ideally all possibilities: -L, -R, -D)

#   Author: Stanislav Zidek <szidek@redhat.com>

#

# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

#

#   Copyright (c) 2015 Red Hat, Inc.

#

#   This program 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.

#

#   This program 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/.

#

# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

# Include Beaker environment

. /usr/share/beakerlib/beakerlib.sh || exit 1

PACKAGE="openssh"

USER="user$RANDOM"

FORWARDED=$((RANDOM % 100 + 6800))

LISTEN=$((RANDOM % 100 + 6900))

TIMEOUT=5

MESSAGE="HUGE_SUCCESS"

SSH_OPTIONS="-o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no"

rlJournalStart

    rlPhaseStartSetup

        rlAssertRpm $PACKAGE

        rlFileBackup /etc/ssh/sshd_config

        rlRun "useradd -m $USER"

        rlRun "su - $USER -c \"mkdir .ssh; chmod 700 .ssh; cd .ssh; ssh-keygen -N '' -f id_rsa; cat id_rsa.pub >authorized_keys; chmod 600 authorized_keys\""

        rlRun "echo 'LogLevel DEBUG' >>/etc/ssh/sshd_config"

        rlServiceStart sshd

        rlRun "IP=\$( ip a |grep 'scope global' |grep -w inet |cut -d'/' -f1 |awk '{ print \$2 }' |tail -1 )"

        rlRun "echo 'IP=$IP'"

        rlRun "TmpDir=\$(mktemp -d)" 0 "Creating tmp directory"

        rlRun "pushd $TmpDir"

    rlPhaseEnd

forwarding_test() {

    EXP_RESULT=$1

    FORWARDED=$2

    HOST=$3

    LISTEN=$4

    rlRun "nc -l $LISTEN &>listen.log &"

    LISTEN_PID=$!

    rlWaitForSocket $LISTEN -t $TIMEOUT

    rlRun "ps -fp $LISTEN_PID"

    rlRun "su - $USER -c \"ssh $SSH_OPTIONS -N -L $FORWARDED:$HOST:$LISTEN $USER@localhost &\" &>tunnel.log"

    rlRun "ps -fC ssh"

    rlRun "SSH_PID=\$( pgrep -n -u $USER ssh )"

    rlRun "echo SSH_PID is '$SSH_PID'"

    rlWaitForSocket $FORWARDED -t $TIMEOUT

    rlRun "[[ -n '$SSH_PID' ]] && ps -fp $SSH_PID"

    rlRun "echo '$MESSAGE'|nc localhost $FORWARDED" 0,1

    if [[ $EXP_RESULT == "success" ]]; then

        rlAssertGrep "$MESSAGE" listen.log

    else # failure expected

        rlAssertGrep "open failed" tunnel.log -i

        rlAssertGrep "administratively prohibited" tunnel.log -i

        rlAssertNotGrep "$MESSAGE" listen.log

    fi

    rlRun "kill -9 $LISTEN_PID $SSH_PID" 0,1 "Killing cleanup"

    rlWaitForSocket $LISTEN -t $TIMEOUT --close

    rlWaitForSocket $FORWARDED -t $TIMEOUT --close

    if ! rlGetPhaseState; then

        rlRun "cat listen.log"

        rlRun "cat tunnel.log"

    fi

    rlFileSubmit listen.log tunnel.log

    rlRun "rm -f *.log;"

}

    rlPhaseStartTest "Local forwarding"

        forwarding_test "success" $FORWARDED localhost $LISTEN

        ((FORWARDED+=1))

        ((LISTEN+=1))

    rlPhaseEnd

    rlPhaseStartTest "PermitOpen with 'any'"

        rlFileBackup --namespace permitopen_any /etc/ssh/sshd_config /etc/hosts

        rlRun "echo 'PermitOpen any' >>/etc/ssh/sshd_config"

        rlRun "echo '$IP anyhost1 anyhost2' >>/etc/hosts"

        rlRun "service sshd restart"

        for i in `seq 3`; do

            forwarding_test "success" $FORWARDED anyhost1 $LISTEN

            forwarding_test "success" $FORWARDED anyhost2 $LISTEN

            ((FORWARDED+=1))

            ((LISTEN+=1))

        done

        rlFileRestore --namespace permitopen_any

    rlPhaseEnd

    if ! rlIsRHEL '<6.7'; then

        # PermitOpen with wildcards is new feature in RHEL-6.7

        rlPhaseStartTest "PermitOpen with port wildcard"

            rlFileBackup --namespace port_wildcard /etc/ssh/sshd_config /etc/hosts

            rlRun "echo 'PermitOpen wildportallow:*' >>/etc/ssh/sshd_config"

            rlRun "echo '$IP wildportallow wildportdeny' >>/etc/hosts"

            rlRun "service sshd restart"

            forwarding_test "success" $FORWARDED wildportallow $LISTEN

            ((FORWARDED+=1))

            ((LISTEN+=1))

            forwarding_test "failure" $FORWARDED wildportdeny $LISTEN

            ((FORWARDED+=1))

            ((LISTEN+=1))

            rlFileRestore --namespace port_wildcard

            rlRun "service sshd restart"

        rlPhaseEnd

    fi

    if ! rlIsRHEL '<7.3'; then

        rlPhaseStartTest "PermitOpen with host wildcard and specific port"

            rlFileBackup --namespace host_wildcard /etc/ssh/sshd_config /etc/hosts

            rlRun "echo 'PermitOpen *:$LISTEN' >>/etc/ssh/sshd_config"

            rlRun "echo '$IP wildhost1 wildhost2' >>/etc/hosts"

            rlRun "service sshd restart"

            forwarding_test "success" $FORWARDED wildhost1 $LISTEN

            ((FORWARDED+=1))

            forwarding_test "success" $FORWARDED wildhost2 $LISTEN

            ((FORWARDED+=1))

            ((LISTEN+=1)) # different listen port, should fail

            forwarding_test "failure" $FORWARDED wildhost2 $LISTEN

            rlFileRestore --namespace host_wildcard

        rlPhaseEnd

    fi

    rlPhaseStartCleanup

        rlRun "userdel -r $USER"

        rlRun "popd"

        rlFileRestore

        rlServiceRestore sshd

        rlRun "rm -r $TmpDir" 0 "Removing tmp directory"

    rlPhaseEnd

rlJournalPrintText

rlJournalEnd