Class: Fuzzer

Inherits:
Object
  • Object
show all
Defined in:
lib/vcseif/utils/fuzzer.rb

Overview

Thanks to Erika for the idea about adding some text at the beginning of the encoded password This clues people in that the password is encoded and also makes sure that the encoding decoding will never fail. Without the extra text, “It will fail if a password has the same number of SEPARATORs as characters”

Constant Summary collapse

SEPARATOR = 
"-"
ENCODED = 
"encoded" + SEPARATOR

Class Method Summary collapse

Class Method Details

.decode(string) ⇒ Object 



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# File 'lib/vcseif/utils/fuzzer.rb', line 33

def self.decode(string)
  return string if string.class.name != 'String'
  return string if string.empty?
  if self.is_encoded?(string)
    decoded = self.remove_every_second_char(string.slice(ENCODED.length,string.length))
    return Base64.decode64(decoded)
  else
    return string
  end
end

.defuzz(string) ⇒ Object 



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# File 'lib/vcseif/utils/fuzzer.rb', line 44

def self.defuzz(string)
  #would have been nice to be able to do alias_method :defuzz, :decode
  return self.decode(string)
end

.encode(string) ⇒ Object 



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# File 'lib/vcseif/utils/fuzzer.rb', line 15

def self.encode(string)
  return string if string.class.name != 'String'
  return string if string.empty?
  encoded = ""
  Base64.encode64(string).each_byte { |b|
    if ( b != 10 ) # \n
      encoded = encoded + b.chr + SEPARATOR
    end 
  }
  return ENCODED + encoded
end

.fuzz(string) ⇒ Object 



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# File 'lib/vcseif/utils/fuzzer.rb', line 27

def self.fuzz(string)
  # would have been nice to be able to do alias_method :fuzz, :encode
  return self.encode(string) 
end

.is_encoded?(string) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vcseif/utils/fuzzer.rb', line 50

def self.is_encoded?(string)
  %{
     Does the string arg  start with "encoded-" and are there an 
     equal number of separator strings and regular characters?
   } 
  return false if string.class.name != 'String'
  sliced = string.slice(ENCODED.length, string.length)
  return string.slice(0,ENCODED.length) == ENCODED && sliced.length == sliced.count(SEPARATOR)*2
end