Module: Zxcvbn::TimeEstimates
- Defined in:
- lib/zxcvbn/time_estimates.rb
Class Method Summary collapse
- .display_time(seconds) ⇒ Object
- .estimate_attack_times(guesses) ⇒ Object
- .guesses_to_score(guesses) ⇒ Object
Class Method Details
.display_time(seconds) ⇒ Object
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# File 'lib/zxcvbn/time_estimates.rb', line 45 def self.display_time(seconds) minute = 60 hour = minute * 60 day = hour * 24 month = day * 31 year = month * 12 century = year * 100 display_num, display_str = if seconds < 1 [nil, "less than a second"] elsif seconds < minute base = seconds.round [base, "#{base} second"] elsif seconds < hour base = (seconds / minute).round [base, "#{base} minute"] elsif seconds < day base = (seconds / hour).round [base, "#{base} hour"] elsif seconds < month base = (seconds / day).round [base, "#{base} day"] elsif seconds < year base = (seconds / month).round [base, "#{base} month"] elsif seconds < century base = (seconds / year).round [base, "#{base} year"] else [nil, "centuries"] end display_str += "s" if display_num && display_num != 1 display_str end |
.estimate_attack_times(guesses) ⇒ Object
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# File 'lib/zxcvbn/time_estimates.rb', line 5 def self.estimate_attack_times(guesses) crack_times_seconds = { "online_throttling_100_per_hour" => guesses / (100.0 / 3600.0), "online_no_throttling_10_per_second" => guesses / 10.0, "offline_slow_hashing_1e4_per_second" => guesses / 1e4, "offline_fast_hashing_1e10_per_second" => guesses / 1e10 } crack_times_display = {} crack_times_seconds.each do |scenario, seconds| crack_times_display[scenario] = display_time(seconds) end { "crack_times_seconds" => crack_times_seconds, "crack_times_display" => crack_times_display, "score" => guesses_to_score(guesses) } end |
.guesses_to_score(guesses) ⇒ Object
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# File 'lib/zxcvbn/time_estimates.rb', line 24 def self.guesses_to_score(guesses) delta = 5 if guesses < 1e3 + delta # risky password: "too guessable" 0 elsif guesses < 1e6 + delta # modest protection from throttled online attacks: "very guessable" 1 elsif guesses < 1e8 + delta # modest protection from unthrottled online attacks: "somewhat guessable" 2 elsif guesses < 1e10 + delta # modest protection from offline attacks: "safely unguessable" # assuming a salted, slow hash function like bcrypt, scrypt, PBKDF2, argon, etc 3 else # strong protection from offline attacks under same scenario: "very unguessable" 4 end end |