Turtle: Remote Control Client

modemSide = "right"
modem = peripheral.wrap(modemSide)
modem.open(512)
msgTab = {}
info = {"turtle",os.getComputerID(),gps.locate()}
modem.transmit(65529,57,textutils.serialize(info))
secretPass = "Ehfks87-i"
secretPass2 = "sgxyg&%UI33%^&HS34DH-N"


function clear()
  term.clear()
  term.setCursorPos(1,1)
end

clear()

function makeString(l)
        if l < 1 then return nil end -- Check for l < 1
        local s = "" -- Start string
        for i = 1, l do
                s = s .. string.char(math.random(32, 126)) -- Generate random number from 32 to 126, turn it into character and add to string
        end
        return s -- Return string
end

function authentificationServer(port)
    authPass = false
    rndString = tostring(makeString(math.random(8,20)))
    modem.transmit(65529,port,textutils.serialize({"turtle",encrypt.encrypt(rndString,secretPass)}))
    qevent, qside, qch1, qch2, qmsg = os.pullEvent("modem_message")
    qmsgTab = textutils.unserialize(qmsg)
    if encrypt.decrypt(qmsgTab[2],secretPass2) == rndString then
        authPass = true
    end
    return authPass
end

function authentificationClient(port)
    qevent, qside, qch1, qch2, qmsg = os.pullEvent("modem_message")
    qmsgTab = textutils.unserialize(qmsg)
    print("msg")
    modem.transmit(65529,57,textutils.serialize({"turtle",encrypt.encrypt(encrypt.decrypt(qmsgTab[2],secretPass),secretPass2)}))
end

authentificationClient(57)
clear()

while true do
    event, side, ch1, ch2, msg = os.pullEvent("modem_message")
    msgTab = textutils.unserialize(msg)
    if msgTab[1]    == "run" and    msgTab[2]   == os.getComputerID()   then
        --if authentificationServer(57) == true then
            shell.run(msgTab[3])
        --end
    end
end