moth/packages/rlyeh/service/rlyeh/rlyeh-ctf

#! /bin/sh

base=${CTF_BASE:-/var/lib/ctf}

echo -n "Team password: "
read -r teamhash

if ! KEY='Too much cheese.' arc4 < $base/teams.txt | grep -q -F -e "$teamhash"; then
    echo 'No such team.'
    exit
fi

cd $base/rlyeh

if [ -f $teamhash ]; then
    now=$(date +%s)
    ts=$(stat -c %Y $teamhash)
    d=$(expr $now - $ts)
    if [ $d -lt 60 ]; then
        echo 'You are trying to connect too fast.'
        exit
    fi
else
    echo 1 > $teamhash
fi
read level < $teamhash

(
    if ! flock -n 8; then
        echo 'Your team is already logged in.'
        exit
    fi

    echo "Your team is on level $level."
    echo

    if setuidgid nobody rlyeh $level; then
        arc4 /opt/rlyeh/tokens/rlyeh/enc.key < $base/tokens/rlyeh
        echo
        expr $level + 1 > $teamhash
    else
	touch $teamhash
    fi
) 8<$teamhash