XOR Encryptor

local args = {...}
if #args < 2 then
    print("USAGE: encryptor [file] [key]")
end
local key = tonumber(args[2])
local bytes = {}

local handle = fs.open(args[1], "rb")
while true do
    local byte = handle.read()
    if byte then
        table.insert(bytes, bit.bxor(byte, key))
    else
        break
    end
end
handle.close()

local enc_handle = fs.open("data", "wb")
for i,v in ipairs(bytes) do
    enc_handle.write(v)
end
enc_handle.close()