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

Editing: base64.rb

# frozen_string_literal: true
#
# = base64.rb: methods for base64-encoding and -decoding strings
#

# The Base64 module provides for the encoding (#encode64, #strict_encode64,
# #urlsafe_encode64) and decoding (#decode64, #strict_decode64,
# #urlsafe_decode64) of binary data using a Base64 representation.
#
# == Example
#
# A simple encoding and decoding.
#
#     require "base64"
#
#     enc   = Base64.encode64('Send reinforcements')
#                         # -> "U2VuZCByZWluZm9yY2VtZW50cw==\n"
#     plain = Base64.decode64(enc)
#                         # -> "Send reinforcements"
#
# The purpose of using base64 to encode data is that it translates any
# binary data into purely printable characters.

module Base64
  module_function

# Returns the Base64-encoded version of +bin+.
  # This method complies with RFC 2045.
  # Line feeds are added to every 60 encoded characters.
  #
  #    require 'base64'
  #    Base64.encode64("Now is the time for all good coders\nto learn Ruby")
  #
  # <i>Generates:</i>
  #
  #    Tm93IGlzIHRoZSB0aW1lIGZvciBhbGwgZ29vZCBjb2RlcnMKdG8gbGVhcm4g
  #    UnVieQ==
  def encode64(bin)
    [bin].pack("m")
  end

# Returns the Base64-decoded version of +str+.
  # This method complies with RFC 2045.
  # Characters outside the base alphabet are ignored.
  #
  #   require 'base64'
  #   str = 'VGhpcyBpcyBsaW5lIG9uZQpUaGlzIG' +
  #         'lzIGxpbmUgdHdvClRoaXMgaXMgbGlu' +
  #         'ZSB0aHJlZQpBbmQgc28gb24uLi4K'
  #   puts Base64.decode64(str)
  #
  # <i>Generates:</i>
  #
  #    This is line one
  #    This is line two
  #    This is line three
  #    And so on...
  def decode64(str)
    str.unpack1("m")
  end

# Returns the Base64-encoded version of +bin+.
  # This method complies with RFC 4648.
  # No line feeds are added.
  def strict_encode64(bin)
    [bin].pack("m0")
  end

# Returns the Base64-decoded version of +str+.
  # This method complies with RFC 4648.
  # ArgumentError is raised if +str+ is incorrectly padded or contains
  # non-alphabet characters.  Note that CR or LF are also rejected.
  def strict_decode64(str)
    str.unpack1("m0")
  end

# Returns the Base64-encoded version of +bin+.
  # This method complies with ``Base 64 Encoding with URL and Filename Safe
  # Alphabet'' in RFC 4648.
  # The alphabet uses '-' instead of '+' and '_' instead of '/'.
  # Note that the result can still contain '='.
  # You can remove the padding by setting +padding+ as false.
  def urlsafe_encode64(bin, padding: true)
    str = strict_encode64(bin)
    str.chomp!("==") or str.chomp!("=") unless padding
    str.tr!("+/", "-_")
    str
  end

# Returns the Base64-decoded version of +str+.
  # This method complies with ``Base 64 Encoding with URL and Filename Safe
  # Alphabet'' in RFC 4648.
  # The alphabet uses '-' instead of '+' and '_' instead of '/'.
  #
  # The padding character is optional.
  # This method accepts both correctly-padded and unpadded input.
  # Note that it still rejects incorrectly-padded input.
  def urlsafe_decode64(str)
    # NOTE: RFC 4648 does say nothing about unpadded input, but says that
    # "the excess pad characters MAY also be ignored", so it is inferred that
    # unpadded input is also acceptable.
    if !str.end_with?("=") && str.length % 4 != 0
      str = str.ljust((str.length + 3) & ~3, "=")
      str.tr!("-_", "+/")
    else
      str = str.tr("-_", "+/")
    end
    strict_decode64(str)
  end
end