Secure password maker

function inputMask(fakeInput)
  charCount = 0
  fakeInputTable = {}
  output = ""
  outputTable = {}

  for i=1, string.len(fakeInput) do
    table.insert(fakeInputTable, string.sub(fakeInput,i,i))
  end

  term.clear()
  term.setCursorPos(1,1)
  sleep(1)
  term.setCursorBlink(true)

  while true do
    event = nil
    key = nil

    while event ~= "char" and key ~= 14 and key ~= 28 do
      event, key = os.pullEvent()
    end

    if key ~= 14 and key ~= 28 then
      table.insert(outputTable, key)
      charCount = charCount + 1
    elseif key == 14 then
      table.remove(outputTable, #outputTable)
      charCount = charCount - 1
      sleep(.2)
    else
      break
    end

    term.clear()
    term.setCursorPos(1,1)
    for i=1,#outputTable do if fakeInputTable[i] ~= nil then term.write(fakeInputTable[i]) end end
    term.setCursorBlink(true)
  end

  term.setCursorPos(1,3)

  for i=1,#outputTable do
    output = output .. outputTable[i]
  end

  return output
end