moth/packages/p2/bin/p2console

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#! /bin/sh
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: ${BASE:=/var/lib/ctf/p2}
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mkdir -p $BASE
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if ! [ -f $BASE/salt ]; then
dd if=/dev/urandom count=1 | md5sum - > $BASE/salt
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fi
clear
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printf '\017'
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read salt < $BASE/salt
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esc () {
printf '%s' "$*" | sed 's/[^-0-9A-Za-z ]/_/g; s/ /+/g'
}
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newteam () {
echo '== Team Creation =='
echo
echo -n 'What would you like your team to be called (3-12 chars)? '
read -r name
echo
namelen=$(printf "%s" "$name" | wc -c)
if [ $namelen -lt 3 ] || [ $namelen -gt 12 ]; then
echo 'Invalid name length'
return
fi
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hash=$(printf '%s %s' "$salt" "$name" | md5sum | cut -b 1-8)
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if [ -d $BASE/$hash ]; then
echo "That name is already in use. Try another one."
return
fi
mkdir $BASE/$hash
printf '%s' "$name" > $BASE/$hash/.name
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cat <<EOD
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Your team hash is $hash. Write that down somewhere and don't lose it.
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If you forget your hash, you'll have to start over from the beginning
with a new team and everybody will laugh at you.
EOD
}
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fini () {
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echo
echo "Press [Enter] to clear the screen."
read
exit 0
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}
echo -n 'Team hash ("new" to create a new team): '
read -r hash
echo
if [ -z "$hash" ]; then
exit 0
elif [ "$hash" = "new" ]; then
newteam
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fini
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elif ! [ -d $BASE/$hash ]; then
echo "No such team, fool."
echo "Is this when everybody laughs at you for forgetting your hash?"
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fini
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fi
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clear
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read -r name < $BASE/$hash/.name
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printf 'Welcome back, %s.\n' "$name"
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while true; do
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printf "p2> "
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read -r answer
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case "$answer" in
\?|help)
cat <<EOD
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 Help
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----------------------------------------------------------
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Type "quit" to leave the p2 shell.
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Any other string is checked as an answer. If the answer
is correct, you are awarded points and the scoreboard will
update within 10 seconds. Check the puzzles overview to
see if your answer unlocked a new puzzle.
EOD
continue
;;
quit)
break
;;
esac
match=$(awk -v ans="$answer" '(substr($0, length($1)+2) == ans) { print substr(FILENAME, 6, length(FILENAME)-17) " " $1; }' /opt/*/answers.txt)
if [ -z "$match" ]; then
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echo 'That is not a correct answer. Type "help" for help.'
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continue
fi
cat=${match% *}
points=${match#* }
fn=$BASE/$hash/$cat.$points
if [ -f $fn ]; then
echo "You've already received points for this answer."
else
> $fn
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echo "You get $points more points in the $cat category."
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# run puzzles.cgi
# update scoreboard
fi
done
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