Module: SecureRandom

Defined in:
activesupport/lib/active_support/core_ext/securerandom.rb

Constant Summary collapse

BASE58_ALPHABET =
('0'..'9').to_a  + ('A'..'Z').to_a + ('a'..'z').to_a - ['0', 'O', 'I', 'l']

Class Method Summary collapse

Class Method Details

.base58(n = 16) ⇒ Object

SecureRandom.base58 generates a random base58 string.

The argument n specifies the length, of the random string to be generated.

If n is not specified or is nil, 16 is assumed. It may be larger in the future.

The result may contain alphanumeric characters except 0, O, I and l

p SecureRandom.base58 # => "4kUgL2pdQMSCQtjE"
p SecureRandom.base58(24) # => "77TMHrHJFvFDwodq8w7Ev2m7"

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# File 'activesupport/lib/active_support/core_ext/securerandom.rb', line 16

def self.base58(n = 16)
  SecureRandom.random_bytes(n).unpack("C*").map do |byte|
    idx = byte % 64
    idx = SecureRandom.random_number(58) if idx >= 58
    BASE58_ALPHABET[idx]
  end.join
end