#!/bin/sh -e
header() {
echo -en 'Content-type: text/html
Strict-Transport-Security: max-age=86400000\n\n'
}
header_redir_display() {
header
echo ""
}
## enforce SSL
#if [ $SERVER_PORT -ne 443 ]; then
# header_redir_display
# exit
#fi
# extract parameters
# tr -dc removes all characters, this prevents things like xss
getp() {
echo "$REQUEST_URI" | sed 's/.*?//' | sed 's/%20/ /g' | tr "?&" "\n" | tr -dc "0-9a-z_= \n" | egrep "^$1=" | sed "s/^$1=//"
}
secret=$(getp secret)
hashed_secret=$(echo "$secret" | md5sum | cut -f1 -d\ )
cmd=$(getp cmd)
#echo "secret $secret" >/var/www/cgi-bin/2
#echo "hashed_secret $hashed_secret" >>/var/www/cgi-bin/2
#echo "cmd $cmd" >>/var/www/cgi-bin/2
# check secret
# the secrets file has to contain the hashes on a single line, comments are allowed on seperate lines
# secrets can only contain the characters that are allowed in getp() with tr -dc
if [ -z "$secret" ] || ! grep -q "^$hashed_secret$" /etc/door-token-hashs; then
header
[ -z "$secret" ] || echo "Ich bin mir nicht sicher. Mir scheint du bist doch ein Kohlkopf oder Anderes!
"
cat /var/www/tpl/secret.html
exit
fi
# control relais card
if [ -n "$cmd" ]; then
case "$cmd" in
indoor_lock) pin=17; delay1=0; delay2=1;;
indoor_unlock) pin=4; delay1=0; delay2=1;;
indoor_open) pin=27; delay1=0; delay2=1;;
outdoor_buzz) pin=22; delay1=15; delay2=5;;
*) header; echo 'Do not hack the hackerspace!'"$cmd"; exit;;
esac
# execute long-running ppio job in background shell
( sleep $delay1
/usr/local/bin/gpio -g write $pin on
sleep $delay2
/usr/local/bin/gpio -g write $pin off
) /dev/null 2>/dev/null &
header
sed 's/XTIMEOUTX/'"$(($delay1 + $delay2))"'/' /var/www/tpl/wait.html | sed 's/XSECRETX/'"$secret"/
exit
fi
# show feature page
header
sed 's/XSECRET_HEREX/'"$secret"'/' /var/www/tpl/features.html
exit