VPN API

--DevelopedLogic's modem api VPN connection
--Uses PixelToast's Encryption API

--RUN VPN AS A PROGRAM BEFORE USING API ON AN NEW
--COMPUTER!

--Settings
password = "changeme"
modemSide = "left"
modemChannel = 1276
pixelAPI = "/pixelapi"

--Initial Checks
if fs.exists(pixelAPI) == false then
  shell.run("pastebin get WRTfH0yx "..pixelAPI)
end

--Functions
function open()
  os.loadAPI(pixelAPI)
  modem = peripheral.wrap(modemSide)
  modem.open(modemChannel)
  modemIsOpen = true
end

function close()
  if modemIsOpen == true and modem.isOpen(modemChannel) == true then
    modem.close(modemChannel)
  else
    error(0, "VPN: Modem is not open!")
  end
end

function push(pushData)
  modem.transmit(modemChannel, modemChannel, pixelapi.encrypt(pushData, password))
end

function pull()
  while true do
    incoming = { os.pullEvent("modem_message") }
    if incoming[3] == modemChannel then
      return pixelapi.decrypt(incoming[5], password)
    end
  end
end