class Mmtrix::Agent::Obfuscator

Constants

EMPTY_KEY_BYTES
PACK_FORMAT

Attributes

key_bytes[R]

Public Class Methods

new(key, length=nil) click to toggle source

RUM uses a shortened key, so just trim it up front

# File lib/mmtrix/agent/obfuscator.rb, line 17
def initialize(key, length=nil)
  if key.nil? || key.empty?
    @key_bytes = EMPTY_KEY_BYTES
  else
    @key_bytes = key.bytes.to_a
    @key_bytes = @key_bytes.first(length) if length
  end
end

Public Instance Methods

deobfuscate(text) click to toggle source
# File lib/mmtrix/agent/obfuscator.rb, line 30
def deobfuscate(text)
  encode(text.unpack(PACK_FORMAT).first )
end
encode(text) click to toggle source
# File lib/mmtrix/agent/obfuscator.rb, line 34
def encode(text)
  return text unless key_bytes

  encoded = ""
  encoded.force_encoding('binary') if encoded.respond_to?( :force_encoding )
  index = 0
  text.each_byte do |byte|
    encoded.concat((byte ^ key_bytes[index % key_bytes.length]))
    index+=1
  end
  encoded
end
obfuscate(text) click to toggle source
# File lib/mmtrix/agent/obfuscator.rb, line 26
def obfuscate(text)
  [ encode(text) ].pack(PACK_FORMAT).gsub(/\n/, '')
end