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Name	Size	Permission	Date
bigdecimal	[ DIR ]	drwxr-xr-x	2026-05-14 08:42
cgi	[ DIR ]	drwxr-xr-x	2026-05-14 08:42
did_you_mean	[ DIR ]	drwxr-xr-x	2026-05-14 08:42
digest	[ DIR ]	drwxr-xr-x	2026-05-14 08:42
erb	[ DIR ]	drwxr-xr-x	2026-05-14 08:42
error_highlight	[ DIR ]	drwxr-xr-x	2026-05-14 08:42
forwardable	[ DIR ]	drwxr-xr-x	2026-05-14 08:42
io	[ DIR ]	drwxr-xr-x	2026-05-14 08:42
json	[ DIR ]	drwxr-xr-x	2026-05-14 08:42
net	[ DIR ]	drwxr-xr-x	2026-05-14 08:42
objspace	[ DIR ]	drwxr-xr-x	2026-05-14 08:42
open3	[ DIR ]	drwxr-xr-x	2026-05-14 08:42
openssl	[ DIR ]	drwxr-xr-x	2026-05-14 08:42
optparse	[ DIR ]	drwxr-xr-x	2026-05-14 08:42
prism	[ DIR ]	drwxr-xr-x	2026-05-14 08:42
psych	[ DIR ]	drwxr-xr-x	2026-05-14 08:42
random	[ DIR ]	drwxr-xr-x	2026-05-14 08:42
ripper	[ DIR ]	drwxr-xr-x	2026-05-14 08:42
set	[ DIR ]	drwxr-xr-x	2026-05-14 08:42
strscan	[ DIR ]	drwxr-xr-x	2026-05-14 08:42
syntax_suggest	[ DIR ]	drwxr-xr-x	2026-05-14 08:42
unicode_normalize	[ DIR ]	drwxr-xr-x	2026-05-14 08:42
uri	[ DIR ]	drwxr-xr-x	2026-05-14 08:42
vendor_ruby	[ DIR ]	drwxr-xr-x	2026-04-24 16:07
yaml	[ DIR ]	drwxr-xr-x	2026-05-14 08:42
English.rb	5.96 KB	-rw-r--r--	2026-04-24 16:08
bundled_gems.rb	8.41 KB	-rw-r--r--	2026-04-24 16:08
cgi.rb	311 B	-rw-r--r--	2026-04-24 16:08
coverage.rb	517 B	-rw-r--r--	2026-04-24 16:08
date.rb	1.17 KB	-rw-r--r--	2026-04-24 16:08
delegate.rb	11.96 KB	-rw-r--r--	2026-04-24 16:08
did_you_mean.rb	4.51 KB	-rw-r--r--	2026-04-24 16:08
digest.rb	3.3 KB	-rw-r--r--	2026-04-24 16:08
erb.rb	32.57 KB	-rw-r--r--	2026-04-24 16:08
error_highlight.rb	84 B	-rw-r--r--	2026-04-24 16:08
expect.rb	2.19 KB	-rw-r--r--	2026-04-24 16:08
fileutils.rb	79.18 KB	-rw-r--r--	2026-04-24 16:08
find.rb	2.54 KB	-rw-r--r--	2026-04-24 16:08
forwardable.rb	8.81 KB	-rw-r--r--	2026-04-24 16:08
ipaddr.rb	22.86 KB	-rw-r--r--	2026-04-24 16:08
json.rb	21.45 KB	-rw-r--r--	2026-04-24 16:08
mkmf.rb	93.16 KB	-rw-r--r--	2026-04-24 16:08
monitor.rb	6.97 KB	-rw-r--r--	2026-04-24 16:08
objspace.rb	4.14 KB	-rw-r--r--	2026-04-24 16:08
open-uri.rb	28.58 KB	-rw-r--r--	2026-04-24 16:08
open3.rb	47.51 KB	-rw-r--r--	2026-04-24 16:08
openssl.rb	1.24 KB	-rw-r--r--	2026-04-24 16:08
optionparser.rb	59 B	-rw-r--r--	2026-04-24 16:08
optparse.rb	65.44 KB	-rw-r--r--	2026-04-24 16:08
pathname.rb	2 KB	-rw-r--r--	2026-04-24 16:08
pp.rb	19.21 KB	-rw-r--r--	2026-04-24 16:08
prettyprint.rb	15.95 KB	-rw-r--r--	2026-04-24 16:08
prism.rb	3.74 KB	-rw-r--r--	2026-04-24 16:08
psych.rb	26.05 KB	-rw-r--r--	2026-04-24 16:08
resolv.rb	88.39 KB	-rw-r--r--	2026-04-24 16:08
ripper.rb	2.44 KB	-rw-r--r--	2026-04-24 16:08
securerandom.rb	2.28 KB	-rw-r--r--	2026-04-24 16:08
shellwords.rb	7.53 KB	-rw-r--r--	2026-04-24 16:08
singleton.rb	5.59 KB	-rw-r--r--	2026-04-24 16:08
socket.rb	61.26 KB	-rw-r--r--	2026-04-24 16:08
syntax_suggest.rb	74 B	-rw-r--r--	2026-04-24 16:08
tempfile.rb	20.7 KB	-rw-r--r--	2026-04-24 16:08
time.rb	24.01 KB	-rw-r--r--	2026-04-24 16:08
timeout.rb	10.48 KB	-rw-r--r--	2026-04-24 16:08
tmpdir.rb	5.62 KB	-rw-r--r--	2026-04-24 16:08
tsort.rb	14.36 KB	-rw-r--r--	2026-04-24 16:08
un.rb	11.17 KB	-rw-r--r--	2026-04-24 16:08
uri.rb	3.09 KB	-rw-r--r--	2026-04-24 16:08
weakref.rb	1.39 KB	-rw-r--r--	2026-04-24 16:08
yaml.rb	2.16 KB	-rw-r--r--	2026-04-24 16:08

Rename

# -*- 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

# The version
  VERSION = "0.4.1"

class << self
    # Returns a random binary string containing +size+ bytes.
    #
    # See Random.bytes
    def bytes(n)
      return gen_random(n)
    end

# Compatibility methods for Ruby 3.2, we can remove this after dropping to support Ruby 3.2
    def alphanumeric(n = nil, chars: ALPHANUMERIC)
      n = 16 if n.nil?
      choose(chars, n)
    end if RUBY_VERSION < '3.3'

private

# :stopdoc:

# Implementation using OpenSSL
    def gen_random_openssl(n)
      return OpenSSL::Random.random_bytes(n)
    end

# Implementation using system random device
    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

# :startdoc:

# Generate random data bytes for Random::Formatter
    public :gen_random
  end
end

SecureRandom.extend(Random::Formatter)