SecuritySystem: ChangePass

os.loadAPI("/.apis/sha")
local w,h = term.getSize()
function getPass()
  local inTerm = window.create(term.current(),w/2-6,h/2,13,1,true)
  local oldTerm = term.redirect(inTerm)
  term.setBackgroundColor(2^7)
  term.write("            ")
  term.setCursorPos(1,1)
  local out = read("*")
  term.redirect(oldTerm)
  term.clear()
  term.setCursorPos(1,1)
  return out
end
local passHashHandle = fs.open("/SecuritySystem/.passhash","r")
local passHash = passHashHandle.readAll()
passHashHandle.close()
while true do
  term.clear()
  term.setCursorPos(math.ceil((w-17)/2),h/2-2)
  term.write("Current Password:")
  local input = getPass()
  if sha.sha256(input)==passHash then
    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 changed")
      sleep(2)
      break
    else
      term.setCursorPos(math.ceil((w-21)/2),h/2)
      term.write("Passwords don't match")
      sleep(2)
    end
  else
    term.setCursorPos(math.ceil((w-8)/2),h/2)
    term.write("Incorrect!")
    sleep(2)
  end
end
term.clear()
term.setCursorPos(1,1)