Contents

require 'fileutils'
require 'encryptor'
require 'digest/sha2'
require 'base64'

abort "USAGE: obfuscator [encryption_key] [filename]" if(ARGV.size < 2)

key = ARGV[0]

salt = Time.now.to_i.to_s
iv = OpenSSL::Cipher::Cipher.new('aes-256-cbc').random_iv
Encryptor.default_options.merge!(:key => key, :iv => iv, :salt => salt)

keyword = '__obfuscated'

source_file_path = ARGV[1]
temp_file_path = "#{source_file_path}.tmp"
abort "FATAL: File #{source_file_path} not found!" unless File.exist? source_file_path
File.delete(temp_file_path) if File.exist?(temp_file_path)

source_file = File.open(source_file_path, 'r')
dest_file = File.open(temp_file_path, 'w')

while !source_file.eof? 
  line = source_file.readline
  if line.include? keyword 
    unencrypted_string = line.scan(/@"(.*)"\s*;/).last.first
    if unencrypted_string.empty? 
      puts "ERROR: Found occurence of __obfuscated string but can't replace!!!"
    else
      puts "INFO:  File: #{source_file_path}"
      puts "INFO:  Found occurence of __obfuscated string: '#{unencrypted_string}'. Replacing..."
    end
    encrypted = "#{Base64.strict_encode64(unencrypted_string.encrypt)}-#{Base64.strict_encode64(iv)}-#{Base64.strict_encode64(salt)}"
    line.slice! keyword
    line = line.gsub(unencrypted_string, encrypted)
  end
  dest_file.puts line
end
source_file.close
dest_file.close

FileUtils.mv source_file_path, "#{source_file_path}.bak"
FileUtils.mv temp_file_path, source_file_path

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
objc-obfuscator-0.1.0	lib/obfuscator.rb