ideal-password/index.js

Password entropy test, loosely inspired by xkcd

#!/usr/bin/env node

'use strict';

const entropy = require('./lib/entropy');

(() => {
  if (require.main === module) {
    let pass = process.argv[2];
    let score = entropy(pass);
    console.log(`Entropy score for "${pass}":`, score.entropy);
    console.log(`  Unique characters : ${score.length}`);
    console.log(`  Token sets: ${score.sets.join(', ')}`);
    if (score.acceptable) {
      if (score.ideal) {
        console.log('Password is ideal.');
      } else {
        console.log('Password is acceptable but not ideal.');
      }
    } else {
      console.log('Password is not acceptable.');
    }
  } else {
    module.exports = entropy;
  }
})();