Enjoy asci[l]icious lava lamp action right in your console.
Quickly hacked together in node, using a fifo file, hasciicam and the ssh2 library, running in docker for "security"
:)
It said there were -2 watching when I logged off. I'm guessing that's a bug in your login counter :)
I have a bug in the login counter, I fixed it, but I've found that someone can crash it by logging in with an unsupported encryption algo, I should catch that (I didn't just wrapped the node run command in a while true loop ;))
Hopefully they are merry pranksters hoping to have a bit of fun on my behalf.
Hopefully they are not people who are actually just running everything as root :)
// Main.js
var fs = require('fs'); var crypto = require('crypto'); var inspect = require('util').inspect;
var ssh2 = require('ssh2'); var utils = ssh2.utils;
var allowedUser = Buffer.from('foo'); var allowedPassword = Buffer.from('bar'); var allowedPubKey = utils.parseKey(fs.readFileSync('foo.pub'));
const EventEmitter = require('events');
let watchers=0; class Framer extends EventEmitter { constructor() {
super();
const borderline = '*----------------------------------------------------------------------*\r\n';
const fd = fs.openSync('./cam', 'r+');
const stream = fs.createReadStream(null, {fd});
let frame = '';
const len = 160*60+60;
stream.on('data', (d)=> {
if (d.toString().trim() === '[stdin end]') {
console.log('stdin end?');
} else {
const bytes = d.toString();
frame = frame+bytes;
if(frame.length > len) {
const out = frame.substr(0,len);
frame = frame.substr(len);
let lines = out.split('\n');
lines.pop();
lines = lines.map ( (l)=> '|'+l.substr(40, 70) +'|');
const fin = borderline + lines.join('\r\n') + '\r\n' + borderline + '\u001b['+(lines.length+2)+'A\u001b[32D';
this.emit('frame', fin);
}
}
});
}const grabber = new Framer();
new ssh2.Server({ hostKeys: [fs.readFileSync('foo.key')] }, function(client) {
client.on('authentication', function(ctx) {
var user = Buffer.from(ctx.username);
console.log(new Date().toISOString()+ ' username:',ctx.username,' watching:', watchers);
ctx.accept();
}).on('ready', function() {
client.on('session', function(accept, reject) {
var session = accept();
session.on('pty', (accept)=>{
accept();
});
session.on('shell', (accept)=>{
const stream = accept();
const listener = (frame)=>{stream.write(frame);};
grabber.on('frame', listener);
watchers++;
stream.on('data', (d)=>{
console.log('data:',d);
if(d[0] === 0x03 || d[0] === 0x1b || d[0] == 0x71) {
console.log('client left peacefully');
stream.write('\r\n Thanks for watching, have a nice day, there were '+watchers+' watching when you logged off. \r\n');
grabber.removeListener('data', listener);
stream.exit(0);
stream.end();
watchers--;
}
});
});
});
}).on('end', function(test) {
console.log(new Date().toISOString()+' Client disconnected', test);
});// running it takes two terminals, one for node, one for the hasciicam:
mkdir lava && cd java npm install --save while true do node main.js done
// camera: cd lava mkfifo cam hasciicam -m text -o cam
ssh -c chacha20-poly1305@openssh.com -p 2222 85.27.249.130 Unable to negotiate with 85.27.249.130 port 2222: no matching cipher found. Their offer: aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm,aes128-gcm@openssh.com,aes256-gcm,aes256-gcm@openssh.com
Have to choose the strongest, latter'est, of the accepted shit ciphers. Cool show. 2 people were watching while you ctrl+c
10/10 would watch again!