Class: Tins::Token

Inherits:
String show all
Defined in:
lib/tins/token.rb

Constant Summary collapse

DEFAULT_ALPHABET = 
"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ".freeze
BASE64_ALPHABET = 
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".freeze
BASE64_URL_FILENAME_SAFE_ALPHABET = 
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_".freeze
BASE32_ALPHABET = 
"ABCDEFGHIJKLMNOPQRSTUVWXYZ234567".freeze
BASE32_EXTENDED_HEX_ALPHABET = 
"0123456789ABCDEFGHIJKLMNOPQRSTUV".freeze
BASE16_ALPHABET = 
"0123456789ABCDEF".freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(bits: 128, length: nil, alphabet: DEFAULT_ALPHABET, random: SecureRandom) ⇒ Token

Returns a new instance of Token.



20
21
22
23
24
25
26
27
28
29
30
31
32
 
# File 'lib/tins/token.rb', line 20

def initialize(bits: 128, length: nil, alphabet: DEFAULT_ALPHABET, random: SecureRandom)
  alphabet.size > 1 or raise ArgumentError, 'need at least 2 symbols in alphabet'
  if length
    length > 0 or raise ArgumentError, 'length has to be positive'
  else
    bits > 0 or raise ArgumentError, 'bits has to be positive'
    length = (Math.log(1 << bits) / Math.log(alphabet.size)).ceil
  end
  self.bits = (Math.log(alphabet.size ** length) / Math.log(2)).floor
  token = ''
  length.times { token << alphabet[random.random_number(alphabet.size)] }
  super token
end

Instance Attribute Details

#bits ⇒ Object

Returns the value of attribute bits.



34
35
36
 
# File 'lib/tins/token.rb', line 34

def bits
  @bits
end