gistfile1.rb

def cipher(mode, salt, pepper, iv)
  @cipher = OpenSSL::Cipher::Cipher.new('aes-128-cbc')
  if mode
    @cipher.encrypt
  else
    @cipher.decrypt
  end
  # @cipher.padding=1
  
  key = Digest::SHA1.hexdigest(salt + pepper)

  @cipher.key = key
  @cipher.iv  = iv
  @cipher
end