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#!/bin/sh
set -efu
msg() { printf "$@\n" >&2 ;}
info() { msg "** $@" ;}
error() { msg "!! $@" ;}
exists(){ type "$1" >/dev/null 2>/dev/null; }
get_hostname(){
# finds the current hostname
# if ENV HOSTN is set echo $HOSTN
if [ -n "${HOSTN:-}" ] ; then printf "${HOSTN:-}"
elif exists hostname ; then printf "${HOSTNAME:-$(hostname)}"
elif exists uci ; then printf "$(uci get system.@system[0].hostname)"
elif [ -e /etc/hostname ] ;then printf "$(cat /etc/hostname)"
else printf "unknown"
fi
}
anytelnet(){
# find Telnet or similar
# requires exist
# if env TELNET is set, will be trying to run this
if [ -e "${TELNET:-does_not_exist}" ]; then
info"Will be using $TELNET as Telnet Client"
elif exists telnet >/dev/null;then
TELNET="`command -v telnet`"
elif exists nc >/dev/null;then
TELNET="`command -v nc`"
elif exists netcat >/dev/null;then
TELNET="`command -v netcat`"
elif exists busybox >/dev/null;then
TELNET="`command -v busybox` telnet"
else
error "Cannot find telnet binary, please install either telnet-client or busybox or netcat or provided TELNET environment.\nbailing out!"
return 1
fi
$TELNET $@
}
send_irc(){
to_dots(){ while read line; do printf .; done;}
## reads from stdin, writes to IRC
##
## requires func: exists() anytelnet()
if [ -z "${HOSTN:-}" ]; then
HOSTN="$(get_hostname)"
info "no HOSTN given, using $HOSTN instead"
fi
IRCCHANNEL=${IRCCHANNEL:-"#krebs_incoming"}
IRCSERVER=${IRCSERVER:-"irc.freenode.net"}
IRCPORT=${IRCPORT:-6667}
NICK="${HOSTN}_$(head /dev/urandom | tr -dc "0123456789" | head -c3)"
info "starting irc connect as $NICK"
( echo "NICK $NICK";
echo "USER $NICK $IRCSERVER bla : $NICK";
echo "JOIN $IRCCHANNEL";
sleep 23;
while read line; do echo "PRIVMSG $IRCCHANNEL :$line";sleep 1;done
sleep 5; ) | anytelnet $IRCSERVER $IRCPORT 2>/dev/null | to_dots
}
# can be set via env:
# torrc - path to torrc (default: /etc/tor/torrc )
# hidden_service_dir - path to hidden service (default: /var/lib/tor/hidden_service/ )
torrc=${torrc:-/etc/tor/torrc}
hidden_service_dir=${hidden_service_dir:-/var/lib/tor/hidden_service/}
test -w "$torrc" || ( error "$torrc is not writable!"; exit 1 )
if ! grep -q '^HiddenService' "$torrc" ;then
info "adding hidden service to $torrc"
cat >> "$torrc" << EOF
HiddenServiceDir ${hidden_service_dir}
HiddenServicePort 22 127.0.0.1:22
EOF
else
info "HiddenServiceDir or Port already in $torrc, skipping!"
fi
cat $hidden_service_dir/hostname | send_irc
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