class Security:
def __init__(self):
import os
env = os.environ
if env.has_key('PYTHON_KEYFILE'):
keyfile = env['PYTHON_KEYFILE']
else:
keyfile = '.python_keyfile'
if env.has_key('HOME'):
keyfile = os.path.join(env['HOME'], keyfile)
if not os.path.exists(keyfile):
import sys
for dir in sys.path:
kf = os.path.join(dir, keyfile)
if os.path.exists(kf):
keyfile = kf
break
try:
self._key = eval(open(keyfile).readline())
except IOError:
raise IOError, "python keyfile %s: cannot open" % keyfile
def _generate_challenge(self):
import random
return random.randint(100, 100000)
def _compare_challenge_response(self, challenge, response):
return self._encode_challenge(challenge) == response
def _encode_challenge(self, challenge):
p, m = self._key
return pow(long(challenge), p, m)
