112 lines
4.0 KiB
Python
112 lines
4.0 KiB
Python
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###############################################################################
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#
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# The MIT License (MIT)
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#
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# Copyright (c) Crossbar.io Technologies GmbH
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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#
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###############################################################################
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import os
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import sys
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import unittest
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import uuid
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import random
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from nacl import utils, public
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from autobahn import util
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@unittest.skipIf(not ('AUTOBAHN_CI_ENABLE_RNG_DEPLETION_TESTS' in os.environ and os.environ['AUTOBAHN_CI_ENABLE_RNG_DEPLETION_TESTS']), 'entropy depletion tests not enabled (env var AUTOBAHN_CI_ENABLE_RNG_DEPLETION_TESTS not set)')
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@unittest.skipIf(not sys.platform.startswith('linux'), 'entropy depletion tests only available on Linux')
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class TestEntropy(unittest.TestCase):
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def test_non_depleting(self):
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res = {}
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with open('/dev/urandom', 'rb') as rng:
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for i in range(1000):
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for j in range(100):
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# "reseed" (seems pointless, but ..)
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random.seed()
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# random UUIDs
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v1 = uuid.uuid4() # noqa
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# stdlib random
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v2 = random.random() # noqa
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v3 = random.getrandbits(32) # noqa
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v4 = random.randint(0, 9007199254740992) # noqa
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v5 = random.normalvariate(10, 100) # noqa
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v6 = random.choice(range(100)) # noqa
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# PyNaCl
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v7 = utils.random(public.Box.NONCE_SIZE) # noqa
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# Autobahn utils
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v8 = util.generate_token(4, 4) # noqa
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v9 = util.id() # noqa
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v10 = util.rid() # noqa
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v11 = util.newid() # noqa
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# direct procfs access to PRNG
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d = rng.read(1000) # noqa
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# check available entropy
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with open('/proc/sys/kernel/random/entropy_avail', 'r') as ent:
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ea = int(ent.read()) // 100
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if ea not in res:
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res[ea] = 0
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res[ea] += 1
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skeys = sorted(res.keys())
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print('\nsystem entropy depletion stats:')
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for k in skeys:
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print('{}: {}'.format(k, res[k]))
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self.assertTrue(skeys[0] > 0)
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def test_depleting(self):
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res = {}
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with open('/dev/random', 'rb') as rng:
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for i in range(10000):
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# direct procfs access to "real" RNG
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d = rng.read(1000) # noqa
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# check available entropy
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with open('/proc/sys/kernel/random/entropy_avail', 'r') as ent:
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ea = int(ent.read()) // 100
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if ea not in res:
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res[ea] = 0
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res[ea] += 1
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skeys = sorted(res.keys())
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print('\nsystem entropy depletion stats:')
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for k in skeys:
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print('{}: {}'.format(k, res[k]))
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self.assertTrue(skeys[0] == 0)
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