SecuritySystem: Installer

local update = false
if fs.exists("/SecuritySystem") then
  update = true
elseif fs.exists("/startup") then
  fs.makeDir("/SecuritySystem")
  fs.copy("/startup","/SecuritySystem/startup")
end
local w,h = term.getSize()
local dlStatus = ""
local num = 1
local max = 4
local function pastebin(id, file)
  dlStatus = dlStatus.."Downloading file "..tostring(num).."/"..tostring(max).."... "
  term.setCursorPos(1,1)
  term.write(dlStatus)
  local handle = fs.open(file,'w')
  local webH = http.get("http://pastebin.com/raw.php?i="..id)
  handle.write(webH.readAll())
  handle.close()
  webH.close()
  sleep(0.25)
  term.setCursorPos(1,h)
  term.write("["..string.rep("=",math.floor((w-2)/max)*num)..string.rep(" ",math.floor((w-2)/max)*(max-num)).."]")
  dlStatus = dlStatus.."Done.\n"
  num = num + 1
end
local function getPass()
  local inTerm = window.create(term.current(),w/2-6,h/2,13,1,true)
  local oldTerm = term.redirect(inTerm)
  term.setBackgroundColor(colors.gray)
  term.write("            ")
  term.setCursorPos(1,1)
  local out = read("*")
  term.redirect(oldTerm)
  term.clear()
  term.setCursorPos(1,1)
  return out
end
term.clear()
term.setCursorBlink(false)
if update then max = 3 end
pastebin("UXtrdHKL","/startup")
pastebin("QMPUPMdP","/SecuritySystem/changePass")
if not update then pastebin("eNJju2fv","/SecuritySystem/logo") end
pastebin("4e6hjKBF","/.apis/sha")
sleep(0.5)
os.loadAPI("/.apis/sha")
local setPass = true
if update and fs.exists("/SecuritySystem/.passhash") then
  term.clear()
  term.setCursorPos(1,1)
  print("Change password [Y/N]?")
  term.setCursorBlink(true)
  local _,key = os.pullEvent("key")
  term.setCursorBlink(false)
  sleep(0)
  if key==21 then
    setPass = true
  else
    setPass = false
  end
end
if setPass then
  while true do
    term.clear()
    term.setCursorPos(math.ceil((w-13)/2),h/2-2)
    term.write("New Password:")
    local newpass = getPass()
    term.setCursorPos(math.ceil((w-16)/2),h/2-2)
    term.write("Repeat Password:")
    local input = getPass()
    if newpass == input then
      local file = fs.open("/SecuritySystem/.passhash","w")
      file.write(sha.sha256(newpass))
      file.close()
      term.setCursorPos(math.ceil((w-16)/2),h/2)
      term.write("Password applied")
      sleep(2)
      break
    else
      term.setCursorPos(math.ceil((w-21)/2),h/2)
      term.write("Passwords don't match")
      sleep(2)
    end
  end
end
term.clear()
term.setCursorPos(1,1)
if not fs.exists("/.apis/AES") or not fs.exists("/filehidercli") or not fs.exists("/driveencrypter") then
  print("Would you like to install Drive Encrypter to add security? [Y/N]")
  sleep(0)
  term.setCursorBlink(true)
  local _, key = os.pullEvent("key")
  term.setCursorBlink(false)
  if key==21 then
    num = 1
    max = 3
    dlStatus = ""
    term.clear()
    pastebin("Jr58QNPF","/driveencrypter")
    pastebin("wQ1aUnpU","/filehidercli")
    pastebin("rCYDnCxn","/.apis/AES")
    term.clear()
    term.setCursorPos(1,1)
  end
end
print("Setup complete. Rebooting...")
sleep(2)
os.reboot()