@contentpass/zxcvbn/lib/time_estimates.js

realistic password strength estimation

// Generated by CoffeeScript 1.12.7
var time_estimates;

time_estimates = {
  estimate_attack_times: function(guesses) {
    var crack_times_display, crack_times_seconds, scenario, seconds;
    crack_times_seconds = {
      online_throttling_100_per_hour: guesses / (100 / 3600),
      online_no_throttling_10_per_second: guesses / 10,
      offline_slow_hashing_1e4_per_second: guesses / 1e4,
      offline_fast_hashing_1e10_per_second: guesses / 1e10
    };
    crack_times_display = {};
    for (scenario in crack_times_seconds) {
      seconds = crack_times_seconds[scenario];
      crack_times_display[scenario] = this.display_time(seconds);
    }
    return {
      crack_times_seconds: crack_times_seconds,
      crack_times_display: crack_times_display,
      score: this.guesses_to_score(guesses)
    };
  },
  guesses_to_score: function(guesses) {
    var DELTA;
    DELTA = 5;
    if (guesses < 1e3 + DELTA) {
      return 0;
    } else if (guesses < 1e6 + DELTA) {
      return 1;
    } else if (guesses < 1e8 + DELTA) {
      return 2;
    } else if (guesses < 1e10 + DELTA) {
      return 3;
    } else {
      return 4;
    }
  },
  display_time: function(seconds) {
    var base, century, day, display_num, display_str, hour, minute, month, ref, year;
    minute = 60;
    hour = minute * 60;
    day = hour * 24;
    month = day * 31;
    year = month * 12;
    century = year * 100;
    ref = seconds < 1 ? [null, 'less than a second'] : seconds < minute ? (base = Math.round(seconds), [base, base + " second"]) : seconds < hour ? (base = Math.round(seconds / minute), [base, base + " minute"]) : seconds < day ? (base = Math.round(seconds / hour), [base, base + " hour"]) : seconds < month ? (base = Math.round(seconds / day), [base, base + " day"]) : seconds < year ? (base = Math.round(seconds / month), [base, base + " month"]) : seconds < century ? (base = Math.round(seconds / year), [base, base + " year"]) : [null, 'centuries'], display_num = ref[0], display_str = ref[1];
    if ((display_num != null) && display_num !== 1) {
      display_str += 's';
    }
    return display_str;
  }
};

module.exports = time_estimates;

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