password-blacklist/in-memory.js

Check passwords against a blacklist

const path = require('path')
const zlib = require('zlib')
const fs = require('fs')

const passwords = new Set()

{
  const passwordFilename = path.resolve(__dirname, './data/passwords.txt.gz')
  const passwordBuffer = fs.readFileSync(passwordFilename)
  const passwordText = zlib.gunzipSync(passwordBuffer).toString('utf8')
  passwordText.split('\n').filter(Boolean).forEach((password) => passwords.add(password))
}

module.exports = (password) => passwords.has(password)