Method: Random::Formatter#hex

Defined in:

lib/securerandom.rb

#hex(n = nil) ⇒ Object

SecureRandom.hex generates a random hexadecimal string.

The argument n specifies the length, in bytes, of the random number to be generated. The length of the resulting hexadecimal string is twice of n.

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

The result may contain 0-9 and a-f.

require 'securerandom'

SecureRandom.hex #=> "eb693ec8252cd630102fd0d0fb7c3485"
SecureRandom.hex #=> "91dc3bfb4de5b11d029d376634589b61"

If a secure random number generator is not available, NotImplementedError is raised.

# File 'lib/securerandom.rb', line 175

def hex(n=nil)
  random_bytes(n).unpack("H*")[0]
end