#!/usr/bin/env python

from sys import argv, exit
from ABAC import ID

if len(argv) < 2:
    print "Usage: abac_keyid.py <cert.pem>"
    exit(1)

id = None
try:
    id = ID(argv[1])
except Exception, e:
    print "Problem loading cert: %s" % e
    exit(1)

print id.id_keyid()