61 lines
1.9 KiB
Bash
Executable file
61 lines
1.9 KiB
Bash
Executable file
#!/bin/sh -e
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header() {
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printf 'Content-type: text/html\nStrict-Transport-Security: max-age=86400000\n\n'
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}
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# extract parameters
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# tr -cd removes all characters, this prevents things like xss
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getp() {
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echo "$REQUEST_URI" | sed 's/.*?//' | sed 's/%20/ /g' \
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| tr '?&' '\n' | tr --complement --delete '0-9a-z_= \n' \
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| grep --extended-regexp "^$1=" | sed "s/^$1=//"
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}
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secret="$(getp secret)"
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secret_length="$(echo "$secret" | wc --chars)"
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hashed_secret="$(echo "$secret" | sha512sum | cut -f1 -d\ )"
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cmd=$(getp cmd)
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# check secret
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# the secrets file has to contain the hashes on a single line, comments are allowed on seperate lines
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# secrets can only contain the characters that are allowed in getp() with tr -cd
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if [ -z "$secret" ] || [ "$secret_length" -lt 30 ] || ! grep -q ";$hashed_secret$" /etc/tuer3.0/door_access_list; then
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header
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[ -z "$secret" ] || echo "<html><p>Ich bin mir nicht sicher. Mir scheint, du bist doch ein Kohlkopf oder Anderes!</p>"
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# $hashed_secret"
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cat /var/www/tpl/secret.html
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exit
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fi
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# control relais card
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if [ -n "$cmd" ]; then
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case "$cmd" in
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#indoor_unlock) pin=17; delay1=0; delay2=1;; unused pin
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indoor_lock) pin=4; delay1=0; delay2=1;;
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indoor_open) pin=27; delay1=0; delay2=1;;
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outdoor_buzz) pin=22; delay1=15; delay2=5;;
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*) header; echo 'Do not hack the hackerspace!'"$cmd"; exit;;
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esac
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# execute long-running ppio job in background shell
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( sleep $delay1
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/usr/local/bin/gpio -g write $pin on
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sleep $delay2
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/usr/local/bin/gpio -g write $pin off
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) </dev/null >/dev/null 2>/dev/null &
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DATE="$(date +"%F %T")"
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echo "$DATE $cmd $hashed_secret" >>/var/log/tuer/log &
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header
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sed 's/XTIMEOUTX/'"$((delay1 + delay2))"'/' /var/www/tpl/wait.html | sed 's/XSECRETX/'"$secret"/
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exit
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fi
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# show feature page
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header
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sed 's/XSECRET_HEREX/'"$secret"'/' /var/www/tpl/features.html
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exit
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