tomit4/notes
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

📝 Scripts on nc and websockets

Browse source
This commit is contained in:
z3rOR0ne 2022-12-16 16:15:39 -08:00
parent 335af55be5
commit 58a1590583
3 changed files with 70 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

6
scripts/netcat_tut.sh
View file

@ -1,6 +0,0 @@
#!/usr/bin/env bash
while :
do
echo -e "HTTP/1.1 200 OK\n\n$(echo '<h1>Hi there</h1>')" | nc -l -k -p 8080 -q 1
done

9
scripts/nk Executable file
View file

@ -0,0 +1,9 @@
#!/usr/bin/env bash
servefile="$1"
while :
do
# echo -e "HTTP/1.1 200 OK\n\n$(echo '<h1>Hi there</h1>')" | nc -l -k -p 8080 -q 1
echo -e "HTTP/1.1 200 OK\n\n$(cat "$servefile")" | nc -l -k -p 8080 -q 1
done

61
scripts/websock.sh Executable file
View file

@ -0,0 +1,61 @@
#!/bin/bash
# https://gist.github.com/apk/2414478
# 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]}-