require "CRC32"
require "minipc"

--Read hash
local pwd = ""
for i=1,8 do
  c = minipc.eepromRead(i-1)
  if c == 0 then
    pwd = nil
	break
  end
  pwd = pwd .. string.char(c)
end

if pwd then
  io.stdout:write("Please enter your password: ")
  line = io.stdin:read("*line")
  hash = string.format("%08X", CRC32.Hash(line))
  if hash == pwd then
    io.stdout:write("Password is correct :-)")
  else
    io.stdout:write("Password is wrong :-(")
  end
else
  io.stdout:write("Please enter a new password: ")
  line = io.stdin:read("*line")
  hash = string.format("%08X", CRC32.Hash(line))
  for i=1,8 do
    minipc.eepromWrite(i-1, string.byte(hash, i))
  end
end