#!/bin/python

import binascii
import codecs
import hashlib
import hmac
import subprocess
import sys

ssh = b'840fedcacdb9e86f1ae1e6a0060de471d4f5fb35'
ss = codecs.decode(ssh, 'hex')

actual = subprocess.check_output(['ykchalresp', '-2', 'deadbeef']).strip().decode()

expected = hmac.new(ss, b'deadbeef', hashlib.sha1).hexdigest()

if actual == expected:
    sys.exit(0)
else
    sys.exit(1)