Class: SuperRandom

Inherits:
Object
  • Object
show all
Defined in:
lib/super_random/version.rb,
lib/super_random/super_random.rb

Constant Summary collapse

VERSION = 
'0.1.0'

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ SuperRandom

Returns a new instance of SuperRandom.



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# File 'lib/super_random/super_random.rb', line 13

def initialize
  @first_timeout = 3
  @second_timeout = 6
  @nevermind = true
  @randomness = 0.0
  @services = 0
end

Instance Attribute Details

#first_timeout ⇒ Object

Returns the value of attribute first_timeout.



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

def first_timeout
  @first_timeout
end

#nevermind ⇒ Object

Returns the value of attribute nevermind.



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

def nevermind
  @nevermind
end

#randomness ⇒ Object (readonly)

Returns the value of attribute randomness.



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# File 'lib/super_random/super_random.rb', line 11

def randomness
  @randomness
end

#second_timeout ⇒ Object

Returns the value of attribute second_timeout.



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

def second_timeout
  @second_timeout
end

#services ⇒ Object (readonly)

Returns the value of attribute services.



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# File 'lib/super_random/super_random.rb', line 11

def services
  @services
end

Class Method Details

.randbyte(r, s) ⇒ Object 



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# File 'lib/super_random/super_random.rb', line 3

def self.randbyte(r,s)
  return r.randbyte
rescue Exception
  warn "RealRand's #{s} failed."
  return nil
end

Instance Method Details

#bytes(n = 32) ⇒ Object 



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# File 'lib/super_random/super_random.rb', line 21

def bytes(n=32)
  @randomness = 0.0
  @services = 0

  r1 = RealRand::RandomOrg.new
  r2 = RealRand::EntropyPool.new
  r3 = RealRand::FourmiLab.new

  a1 = a2 = a3 = nil

  t1 = Thread.new{ a1 = SuperRandom.randbyte(r1,'RandomOrg')[0...n] }
  t2 = Thread.new{ a2 = SuperRandom.randbyte(r2,'EntropyPool')[0...n] }
  t3 = Thread.new{ a3 = SuperRandom.randbyte(r3,'FourmiLab')[0...n] }

  begin
    Timeout.timeout(@first_timeout) do
      # Initially, would like to get them all.
      t1.join and t2.join and t3.join
    end
  rescue Timeout::Error
    begin
      Timeout.timeout(@second_timeout) do
        # But at this point,
        # would like to get at least one.
        while a1.nil? and a2.nil? and a3.nil? and (t1.alive? or t2.alive? or t3.alive?)
          Thread.pass
        end
      end
    rescue Timeout::Error
      # If we don't care that we got nothing, go on.
      raise $! unless @nevermind
    end
  end

  a = n.times.inject([]){|b,i|b.push(SecureRandom.random_number(256))}
  [a1, a2, a3].each do |b|
    if b
      bl = b.length
      @randomness += bl.to_f/n.to_f
      @services += 1
      n.times{|i|a[i]=(a[i]+b[i%bl])%256}
    end
  end

  return a
end

#hexadecimal(n = 32) ⇒ Object 



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# File 'lib/super_random/super_random.rb', line 68

def hexadecimal(n=32)
  bytes(n).map{|i|i.to_s(16).rjust(2,'0')}.join
end

#rand(m = nil, n = 6) ⇒ Object 



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# File 'lib/super_random/super_random.rb', line 72

def rand(m=nil, n=6)
  div = n.times.inject(''){|s,i| s+'FF'}.to_i(16).to_f
  r = hexadecimal(n).to_i(16).to_f / div
  m.nil? ? r : (m*r).to_i
end