Class: StrongPassword::QwertyAdjuster

Inherits:
Object
  • Object
show all
Defined in:
lib/strong_password/qwerty_adjuster.rb

Constant Summary collapse

QWERTY_STRINGS = 
[
  "1234567890-",
  "qwertyuiop",
  "asdfghjkl;",
  "zxcvbnm,./",
  "1qaz2wsx3edc4rfv5tgb6yhn7ujm8ik,9ol.0p;/-['=]:?_{\"+}",
  "1qaz2wsx3edc4rfv5tgb6yhn7ujm8ik9ol0p",
  "qazwsxedcrfvtgbyhnujmik,ol.p;/-['=]:?_{\"+}",
  "qazwsxedcrfvtgbyhnujmikolp",
  "]\"/=[;.-pl,0okm9ijn8uhb7ygv6tfc5rdx4esz3wa2q1",
  "pl0okm9ijn8uhb7ygv6tfc5rdx4esz3wa2q1",
  "]\"/[;.pl,okmijnuhbygvtfcrdxeszwaq",
  "plokmijnuhbygvtfcrdxeszwaq",
  "014725836914702583697894561230258/369*+-*/",
  "abcdefghijklmnopqrstuvwxyz"
]

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(password) ⇒ QwertyAdjuster

Returns a new instance of QwertyAdjuster.



22
23
24
 
# File 'lib/strong_password/qwerty_adjuster.rb', line 22

def initialize(password)
  @base_password = password.dup.downcase
end

Instance Attribute Details

#base_password ⇒ Object (readonly)

Returns the value of attribute base_password.



20
21
22
 
# File 'lib/strong_password/qwerty_adjuster.rb', line 20

def base_password
  @base_password
end

Instance Method Details

#adjusted_entropy(entropy_threshhold: 0) ⇒ Object

Returns the minimum entropy for the password’s qwerty locality adjustments. If a threshhold is specified we will bail early to avoid unnecessary processing.



37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
 
# File 'lib/strong_password/qwerty_adjuster.rb', line 37

def adjusted_entropy(entropy_threshhold: 0)
  revpassword = base_password.reverse
  min_entropy = [EntropyCalculator.calculate(base_password), EntropyCalculator.calculate(revpassword)].min
  QWERTY_STRINGS.each do |qwertystr|
    qpassword = mask_qwerty_strings(base_password, qwertystr)
    qrevpassword = mask_qwerty_strings(revpassword, qwertystr)
    if qpassword != base_password
      numbits = EntropyCalculator.calculate(qpassword)
      min_entropy = [min_entropy, numbits].min
      return min_entropy if min_entropy < entropy_threshhold
    end
    if qrevpassword != revpassword
      numbits = EntropyCalculator.calculate(qrevpassword)
      min_entropy = [min_entropy, numbits].min
      return min_entropy if min_entropy < entropy_threshhold
    end
  end
  min_entropy
end

#is_strong?(min_entropy: 18) ⇒ Boolean

Returns:

  • (Boolean) 


26
27
28
 
# File 'lib/strong_password/qwerty_adjuster.rb', line 26

def is_strong?(min_entropy: 18)
  adjusted_entropy(entropy_threshhold: min_entropy) >= min_entropy
end

#is_weak?(min_entropy: 18) ⇒ Boolean

Returns:

  • (Boolean) 


30
31
32
 
# File 'lib/strong_password/qwerty_adjuster.rb', line 30

def is_weak?(min_entropy: 18)
  !is_strong?(min_entropy: min_entropy)
end