#!/usr/bin/env python
import sys
from binascii import unhexlify
from pure25519.basic import Zero, L, bytes_to_unknown_group_element

ORDERS = {1: "1", 2: "2", 4: "4", 8: "8",
          1*L: "1*L", 2*L: "2*L", 4*L: "4*L", 8*L: "8*L"}
def get_order(e):
    for o in sorted(ORDERS):
        if e.scalarmult(o) == Zero:
            return o

elem = bytes_to_unknown_group_element(unhexlify(sys.argv[1]))
order = get_order(elem)
if order != L:
    print "Wrong order", ORDERS[order]
else:
    print "Order is OK"