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#!/bin/bash | |
# WebSocket shell, start & browse to http://<Host>:6655/ | |
# Requires bash 4.x, openssl. | |
# Author: rootshell@corelogics.de (which isn't me, apk) | |
coproc d { nc -l -p 6656 -q 0; } | |
nc -l -p 6655 -q 1 > /dev/null <<-ENDOFPAGE | |
HTTP/1.1 200 OK | |
<html><head><script language="javascript"> | |
var url = location.hostname + ':' + (parseInt(location.port) + 1); | |
var ws = new WebSocket('ws://' + url + '/test'); | |
ws.onmessage = function(msg) { | |
document.f.out.value += msg.data + '\n'; | |
document.f.out.scrollTop = document.f.out.scrollHeight; | |
} | |
ws.onclose = function() { alert('Connection closed.'); } | |
function send() { | |
ws.send('' + document.f.in.value); | |
document.f.in.value=''; | |
} | |
</script></head><body><form name="f"><textarea name="out" cols="100"rows="40"></textarea> | |
<input value="" type="text" size="120" id="in" onkeypress="if(event.keyCode==13){send();return false;}" /> | |
</form></body></html> | |
ENDOFPAGE | |
until read line; line=`tr -d '\r\n'<<<$line`; test -z "$line"; do | |
test "${line:0:18}" = "Sec-WebSocket-Key:" && key=${line:19} | |
test "${line:0:22}" = "Sec-WebSocket-Version:" && ver=$line | |
done <&${d[0]} | |
rkey=`echo -n ${key}258EAFA5-E914-47DA-95CA-C5AB0DC85B11|openssl dgst -sha1 -binary|base64` | |
echo -ne "HTTP/1.1 101 Switching Protocols\r\n" >&${d[1]} | |
echo -ne "Upgrade: websocket\r\nConnection: Upgrade\r\n" >&${d[1]} | |
echo -ne "Sec-WebSocket-Accept: $rkey\r\n$ver\r\n\r\n" >&${d[1]} | |
doasync() { | |
bash -c "$1" | while read line; do | |
while [ "${#line}" -gt 0 ]; do | |
l2=${line:0:80} | |
len=`echo -n "$l2" | wc -c | tr -d ' '` | |
echo -ne "\x81\x`printf '%02x' $len`$l2" | |
line=${line:80} | |
done | |
done & | |
} | |
while true; do | |
reclen=$((`od -j 1 -N 1 -t dI -A n <&${d[0]}` - 128)) | |
for i in `seq 0 3`; do | |
mk[$i]=`od -N 1 -t dI -A n <&${d[0]}` | |
done | |
msg="" | |
for i in `seq 0 $(($reclen - 1))`; do | |
bt=`od -N 1 -t dI -A n <&${d[0]}` | |
bt=$(($bt ^ ${mk[$(($i % 4))]})) | |
msg="$msg$(echo -e "\x`printf '%02x' $bt`")" | |
done | |
test "$msg" = "exit" && break | |
doasync "$msg" >&${d[1]} | |
done | |
echo >&${d[1]}- |
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