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# -*- coding: us-ascii -*-
# frozen_string_literal: true

require 'random/formatter'

# == Secure random number generator interface.
#
# This library is an interface to secure random number generators which are
# suitable for generating session keys in HTTP cookies, etc.
#
# You can use this library in your application by requiring it:
#
#   require 'securerandom'
#
# It supports the following secure random number generators:
#
# * openssl
# * /dev/urandom
# * Win32
#
# SecureRandom is extended by the Random::Formatter module which
# defines the following methods:
#
# * alphanumeric
# * base64
# * choose
# * gen_random
# * hex
# * rand
# * random_bytes
# * random_number
# * urlsafe_base64
# * uuid
#
# These methods are usable as class methods of SecureRandom such as
# +SecureRandom.hex+.
#
# If a secure random number generator is not available,
# +NotImplementedError+ is raised.

module SecureRandom
  class << self
    def bytes(n)
      return gen_random(n)
    end

private

def gen_random_openssl(n)
      @pid = 0 unless defined?(@pid)
      pid = $$
      unless @pid == pid
        now = Process.clock_gettime(Process::CLOCK_REALTIME, :nanosecond)
        OpenSSL::Random.random_add([now, @pid, pid].join(""), 0.0)
        seed = Random.urandom(16)
        if (seed)
          OpenSSL::Random.random_add(seed, 16)
        end
        @pid = pid
      end
      return OpenSSL::Random.random_bytes(n)
    end

def gen_random_urandom(n)
      ret = Random.urandom(n)
      unless ret
        raise NotImplementedError, "No random device"
      end
      unless ret.length == n
        raise NotImplementedError, "Unexpected partial read from random device: only #{ret.length} for #{n} bytes"
      end
      ret
    end

begin
      # Check if Random.urandom is available
      Random.urandom(1)
      alias gen_random gen_random_urandom
    rescue RuntimeError
      begin
        require 'openssl'
      rescue NoMethodError
        raise NotImplementedError, "No random device"
      else
        alias gen_random gen_random_openssl
      end
    end

public :gen_random
  end
end

SecureRandom.extend(Random::Formatter)

[-] pstore.rb [open]
[-] ripper.rb [open]
[-] optparse.rb [open]
[-] singleton.rb [open]
[+] ..
[-] tempfile.rb [open]
[+] csv
[-] time.rb [open]
[-] delegate.rb [open]
[-] forwardable.rb [open]
[-] json.rb [open]
[-] abbrev.rb [open]
[-] fileutils.rb [open]
[-] set.rb [open]
[-] csv.rb [open]
[-] coverage.rb [open]
[-] yaml.rb [open]
[-] socket.rb [open]
[-] error_highlight.rb [open]
[+] reline
[+] optparse
[-] kconv.rb [open]
[-] psych.rb [open]
[-] monitor.rb [open]
[-] date.rb [open]
[-] pp.rb [open]
[+] racc
[-] readline.rb [open]
[-] English.rb [open]
[-] cgi.rb [open]
[-] bigdecimal.rb [open]
[-] benchmark.rb [open]
[+] syslog
[-] logger.rb [open]
[+] openssl
[-] find.rb [open]
[+] random
[-] resolv-replace.rb [open]
[-] erb.rb [open]
[-] tmpdir.rb [open]
[+] yaml
[-] drb.rb [open]
[+] io
[+] syntax_suggest
[+] rinda
[-] expect.rb [open]
[-] mutex_m.rb [open]
[+] ruby_vm
[-] base64.rb [open]
[-] openssl.rb [open]
[-] fiddle.rb [open]
[-] ostruct.rb [open]
[+] error_highlight
[-] reline.rb [open]
[+] vendor_ruby
[+] did_you_mean
[-] shellwords.rb [open]
[+] benchmark
[-] uri.rb [open]
[+] fiddle
[+] net
[+] digest
[+] cgi
[-] ipaddr.rb [open]
[-] syntax_suggest.rb [open]
[+] set
[+] json
[+] psych
[+] forwardable
[+] bigdecimal
[+] open3
[+] ripper
[-] un.rb [open]
[-] optionparser.rb [open]
[-] getoptlong.rb [open]
[-] pathname.rb [open]
[-] observer.rb [open]
[+] drb
[-] weakref.rb [open]
[-] resolv.rb [open]
[-] open3.rb [open]
[-] racc.rb [open]
[+] logger
[-] did_you_mean.rb [open]
[-] objspace.rb [open]
[-] mkmf.rb [open]
[+] objspace
[+] erb
[-] securerandom.rb [open]
[-] open-uri.rb [open]
[-] prettyprint.rb [open]
[-] tsort.rb [open]
[-] timeout.rb [open]
[-] digest.rb [open]
[+] unicode_normalize
[+] uri