Move challenge into pkg

pkg/challenge/Dockerfile

@@ -0,0 +1,59 @@
+FROM alpine AS mirror
+
+RUN mkdir -p /out/etc/apk/ && \
+    cp /etc/apk/repositories /out/etc/apk/ && \
+    cp -r /etc/apk/keys /out/etc/apk/keys
+
+RUN apk add --no-cache \
+    mdocml-apropos
+
+RUN apk add --no-cache --initdb -p /out \
+    alpine-baselayout \
+    beep \
+    bind-doc \
+    bind-tools \
+    busybox \
+    ca-certificates \
+    curl \
+    curl-doc \
+    e2fsprogs \
+    ethtool \
+    ethtool-doc \
+    fbida-fbi \
+    fbida-doc \
+    htop \
+    htop-doc \
+    iproute2 \
+    iproute2-doc \
+    kbd \
+    kbd-bkeymaps \
+    kbd-doc \
+    kbd-vlock \
+    man \
+    musl \
+    nano \
+    openssh-client \
+    openssh-doc \
+    openssh-keygen \
+    pciutils \
+    pciutils-doc \
+    ssmtp \
+    ssmtp-doc \
+    tcpdump \
+    tcpdump-doc \
+    testdisk \
+    testdisk-doc \
+    tini \
+    ttf-inconsolata \
+    util-linux \
+    util-linux-doc
+
+RUN makewhatis /out/usr/share/man
+
+RUN rm -rf /out/etc/inittab
+
+
+FROM scratch
+
+COPY --from=mirror /out/ /
+COPY lib/ /lib/

pkg/challenge/adlin

@@ -0,0 +1,98 @@
+#!/bin/sh
+
+# FUNCTIONS ###########################################################
+
+# script usage
+usage() {
+    >&2 cat <<EOF
+ADLIN token generator
+EOF
+}
+
+# token generator
+token_generator() {
+    {
+	echo -n ${PKEY}
+	for d
+	do
+	    echo -n :${d}
+	done
+    } | sha512sum | cut -d ' ' -f 1
+}
+
+# JSON token format helper
+token_format() {
+    local TID=$1
+    local TOKEN=$2
+    shift 2
+
+    [ $# -gt 0 ] && {
+	local DATA=',
+    "data": [';
+	for d; do
+	    [ -z "$Z" ] && Z=1 || DATA="$DATA, "
+	    DATA="$DATA\"$d\""
+	done
+	DATA="$DATA]"
+    }
+
+    local challenge=
+    [ -z "${TID}" ] || {
+	challenge="
+    \"challenge\": ${TID},"
+    }
+
+    cat <<EOF
+{
+    "login": "${ULGN}",${challenge}
+    "token": "${TOKEN}"${DATA}
+}
+EOF
+}
+
+# /proc/cmdline parser (from Gentoo Wiki)
+cmdline() {
+    local value
+    value=" $(cat /proc/cmdline) "
+    value="${value##* $1=}"
+    value="${value%% *}"
+    [ "$value" != "" ] && echo "$value"
+}
+
+
+# GLOBAL VARIABLES ####################################################
+
+ULGN=$(cmdline adlin.login)
+PKEY=$(cmdline adlin.key)
+
+
+# MAIN ################################################################
+
+[ $# -lt 1 ] && { usage; exit 1; }
+
+TOKENID="$1"
+case "${TOKENID}" in
+    token1|token2)
+	HDATA=42
+	;;
+    token3|token6)
+	DATA=$(date +%s%N)
+    ;;
+    token4)
+	echo "${TOKENID} is not here! Perhaps it has been accidentally deleted?" >&2
+	exit 2
+    ;;
+    token5)
+	HDATA=$(dig +short +time=1 +tries=0 adlin.nemunai.re $2 | sed 's/["\\]//g') || {
+	    echo "Try again! Your resolver settings seems not good :(" >&2
+	    exit 3
+	}
+	echo $HDATA | grep "not here" 2> /dev/null && exit 3
+    ;;
+    *)
+	DATA=$@
+	TOKENID=
+	;;
+esac
+
+token_format "${TOKENID#token}" "$(token_generator ${TOKENID#token} ${HDATA} ${DATA})" ${DATA}

pkg/challenge/build.yml

@@ -0,0 +1 @@
+image: challenge

pkg/challenge/init

@@ -0,0 +1,93 @@
+#!/bin/sh
+
+mount -t proc proc /proc
+mount -t sysfs sysfs /sys
+
+/bin/busybox --install -s
+
+mdev -s
+
+modprobe snd-pcsp
+
+# /proc/cmdline parser (from Gentoo Wiki)
+cmdline() {
+    local value
+    value=" $(cat /proc/cmdline) "
+    value="${value##* $1=}"
+    value="${value%% *}"
+    [ "$value" != "" ] && echo "$value"
+}
+
+# Get some command line options
+USER_LOGIN=$(cmdline adlin.login)
+USER_PKEY=$(cmdline adlin.key)
+
+# Define hostname
+hostname adlin-${USER_LOGIN}
+
+# Launch some TTYs
+for i in `seq 2 4`
+do
+    while true
+    do
+	/usr/bin/setsid /sbin/agetty -l /sbin/fakelogin 38400 "tty${i}" linux
+    done &
+done
+
+# Hide us!
+/bin/rm -f /init /linuxrc
+
+# Randomize time at boot
+/bin/date -s 19$((70 + $RANDOM % 30))0$((1 + $RANDOM % 9))0$((1 + $RANDOM % 9))0$((1 + $RANDOM % 9)).0$((1 + $RANDOM % 9))01 > /dev/null
+/sbin/sysctl -w net.ipv4.ip_default_ttl=4 > /dev/null
+
+# Launch some daemons
+/usr/bin/setsid /usr/sbin/crond > /dev/null &
+
+# Change font
+zcat /usr/share/consolefonts/Inconsolata-16r.psf.gz | loadfont
+
+# Prepare token 4
+mkdir -p /mnt
+
+for l in a b c d e f g h i j k l m n o p q r s t u v w x y z zz; do
+    [ -b /dev/sd$l ] || break
+done
+
+/bin/dd if=/dev/zero of=/dev/sd${l} count=1 > /dev/null 2> /dev/null
+/bin/dd if=/dev/zero of=/dev/sd${l}1 count=1 bs=10240000 > /dev/null 2> /dev/null
+/sbin/mkfs.ext4 /dev/sd${l}1 > /dev/null 2> /dev/null
+mount /dev/sd${l}1 /mnt > /dev/null 2> /dev/null
+N1=$((72 - $RANDOM % 35))
+N2=$((25 + $RANDOM % 35))
+{
+    echo -n $N1
+    echo -n $N2
+    echo -n ${USER_PKEY:$N1:$N2} | sha512sum | cut -d " " -f 1
+
+} > /mnt/token4
+sync
+rm /mnt/token4
+sync
+umount /mnt
+
+
+# Launch requested init
+if grep init= /proc/cmdline > /dev/null 2> /dev/null
+then
+    INIT=$(cmdline init)
+    [ -z "${INIT}" ]
+
+    while true
+    do
+	sleep $((10 + $RANDOM % 49))
+	beep -f 1000 -r 2 -n -r 5 -l 10 --new
+    done &
+
+    exec /usr/bin/setsid sh -c "exec '${INIT}' </dev/tty1 >/dev/tty1 2>&1"
+else
+    while true
+    do
+	/usr/bin/setsid /sbin/agetty -l /sbin/fakelogin 38400 tty1 linux
+    done
+fi

pkg/challenge/issue

@@ -0,0 +1,10 @@
+       .o.             .o8  ooooo         o8o
+      .888.           "888  `888'         `"'
+     .8"888.      .oooo888   888         oooo  ooo. .oo.
+    .8' `888.    d88' `888   888         `888  `888P"Y88b
+   .88ooo8888.   888   888   888          888   888   888
+  .8'     `888.  888   888   888       o  888   888   888
+ o88o     o8888o `Y8bod88P" o888ooooood8 o888o o888o o888o
+
+
+This is \n.pie.epita.net (\s \m) \t