Mercurial > cpython-lru_cache-weakref

annotate Demo/pdist/security.py @ 5817:48b94de85bf3 legacy-trunk

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Extensive changes by AMK.
author Guido van Rossum <guido@python.org>
date Thu, 17 Jul 1997 16:29:42 +0000
parents 469369ad2f2f
children d7c568e7707b
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1 class Security:
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2
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3 def __init__(self):
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4 import os
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5 env = os.environ
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6 if env.has_key('PYTHON_KEYFILE'):
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7 keyfile = env['PYTHON_KEYFILE']
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8 else:
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9 keyfile = '.python_keyfile'
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10 if env.has_key('HOME'):
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11 keyfile = os.path.join(env['HOME'], keyfile)
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12 if not os.path.exists(keyfile):
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13 import sys
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14 for dir in sys.path:
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15 kf = os.path.join(dir, keyfile)
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16 if os.path.exists(kf):
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17 keyfile = kf
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18 break
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19 try:
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20 self._key = eval(open(keyfile).readline())
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21 except IOError:
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22 raise IOError, "python keyfile %s: cannot open" % keyfile
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23
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24 def _generate_challenge(self):
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25 import whrandom
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26 return whrandom.randint(100, 100000)
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27
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28 def _compare_challenge_response(self, challenge, response):
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29 return self._encode_challenge(challenge) == response
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30
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31 def _encode_challenge(self, challenge):
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32 p, m = self._key
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33 return pow(long(challenge), p, m)