Dumbed down module to show eas encoding/decoding

encoding.rb

module Encoding
  def aes_encode(string, passphrase)
    c = OpenSSL::Cipher::Cipher.new("aes-256-cbc")
    c.encrypt
    c.key = key = Digest::SHA1.hexdigest(passphrase)
    e = c.update(string)
    e << c.final
  end

  def aes_decode(string, passphrase)
    c = OpenSSL::Cipher::Cipher.new("aes-256-cbc")
    c.decrypt
    c.key = key = Digest::SHA1.hexdigest(passphrase)
    d = c.update(string)
    d << c.final
  end
end