Cookie Management Background

BrowserCookieSnippet.js

// Can be pasted in a Chrome console to overflow the client's cookie
sizeof = (str) => (new TextEncoder('utf-8').encode(str)).length
logSize = (str, label) => console.log('sizeof ', label || str, ' ', sizeof(str))

cookieChar='🍪';
repeat = 1000;
totalLimit=3000;
cookieVal = cookieChar.repeat(repeat);
logSize(cookieChar);
logSize(cookieVal, cookieChar+' '+'(repeat '+repeat+'X)')
keyPrefix = 1;

while(sizeof(document.cookie) < totalLimit && keyPrefix < 10){
  cookieName = '_hp2.'+keyPrefix
  console.log('adding ', cookieName)
  document.cookie=cookieName+'='+cookieVal
  logSize(document.cookie, 'document.cookie')
  keyPrefix++;
}

hitHostWithLargeCookie.js

// Can be pasted in a Chrome console to overflow the client's cookie
const https = require('https');

const cookieChar = "C";
const repeat = 8200;

cookie = "_hp2.blahh="+cookieChar.repeat(repeat)
console.log(cookie)

const options = {
  hostname: 'members.wework.com',
  port: 443,
  path: '/',
  method: 'GET',
  headers: {
    'Set-Cookie': cookie
  }
}

console.log("cookieSize: ",  Buffer.byteLength(cookie, 'utf8'), "bytes")


const req = https.request(options, (res) => {
  console.log(`statusCode: ${res.statusCode}`)
})

req.on('error', (error) => {
  console.error(error)
})

req.end()