Class: SecureRandomString

Inherits:
String
  • Object
show all
Defined in:
lib/secure_random_string.rb

Constant Summary collapse

UC_LETTERS = 
('A'..'Z').to_a.freeze
LC_LETTERS = 
('a'..'z').to_a.freeze
NUMBERS = 
(0..9).to_a.freeze
CHARACTERS = 
%w{/ . , + ^ [ ] - + - = _ * % @ : # ~}.freeze

Instance Method Summary collapse

Constructor Details

#initialize(length, options = {}) ⇒ SecureRandomString

Returns a new instance of SecureRandomString.



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# File 'lib/secure_random_string.rb', line 10

def initialize(length, options = {})
  # By default, don't include characters in strings.
  options[:characters] ||= false

  # Build a set of possible characters for the string
  set = []
  set += UC_LETTERS       unless options[:uppercase] == false
  set += LC_LETTERS       unless options[:lowercase] == false
  set += NUMBERS          unless options[:numbers] == false
  set += CHARACTERS       unless options[:characters] == false
  set += options[:extra]  if options[:extra].is_a?(Array)

  # Populate the string
  length.times.each do
    self << set[SecureRandom.random_number(set.size)].to_s
  end
end