84 lines
3.4 KiB
Python
84 lines
3.4 KiB
Python
# -*- coding: utf-8 -*-
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#
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# SelfTest/Random/Fortuna/test_FortunaGenerator.py: Self-test for the FortunaGenerator module
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#
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# Written in 2008 by Dwayne C. Litzenberger <dlitz@dlitz.net>
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#
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# ===================================================================
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# The contents of this file are dedicated to the public domain. To
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# the extent that dedication to the public domain is not available,
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# everyone is granted a worldwide, perpetual, royalty-free,
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# non-exclusive license to exercise all rights associated with the
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# contents of this file for any purpose whatsoever.
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# No rights are reserved.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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# ===================================================================
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"""Self-tests for Crypto.Random.Fortuna.FortunaGenerator"""
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__revision__ = "$Id$"
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import sys
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if sys.version_info[0] == 2 and sys.version_info[1] == 1:
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from Crypto.Util.py21compat import *
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from Crypto.Util.py3compat import *
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import unittest
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from binascii import b2a_hex
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class FortunaGeneratorTests(unittest.TestCase):
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def setUp(self):
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global FortunaGenerator
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from Crypto.Random.Fortuna import FortunaGenerator
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def test_generator(self):
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"""FortunaGenerator.AESGenerator"""
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fg = FortunaGenerator.AESGenerator()
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# We shouldn't be able to read data until we've seeded the generator
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self.assertRaises(Exception, fg.pseudo_random_data, 1)
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self.assertEqual(0, fg.counter.next_value())
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# Seed the generator, which should set the key and increment the counter.
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fg.reseed(b("Hello"))
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self.assertEqual(b("0ea6919d4361551364242a4ba890f8f073676e82cf1a52bb880f7e496648b565"), b2a_hex(fg.key))
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self.assertEqual(1, fg.counter.next_value())
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# Read 2 full blocks from the generator
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self.assertEqual(b("7cbe2c17684ac223d08969ee8b565616") + # counter=1
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b("717661c0d2f4758bd6ba140bf3791abd"), # counter=2
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b2a_hex(fg.pseudo_random_data(32)))
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# Meanwhile, the generator will have re-keyed itself and incremented its counter
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self.assertEqual(b("33a1bb21987859caf2bbfc5615bef56d") + # counter=3
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b("e6b71ff9f37112d0c193a135160862b7"), # counter=4
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b2a_hex(fg.key))
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self.assertEqual(5, fg.counter.next_value())
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# Read another 2 blocks from the generator
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self.assertEqual(b("fd6648ba3086e919cee34904ef09a7ff") + # counter=5
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b("021f77580558b8c3e9248275f23042bf"), # counter=6
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b2a_hex(fg.pseudo_random_data(32)))
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# Try to read more than 2**20 bytes using the internal function. This should fail.
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self.assertRaises(AssertionError, fg._pseudo_random_data, 2**20+1)
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def get_tests(config={}):
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from Crypto.SelfTest.st_common import list_test_cases
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return list_test_cases(FortunaGeneratorTests)
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if __name__ == '__main__':
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suite = lambda: unittest.TestSuite(get_tests())
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unittest.main(defaultTest='suite')
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# vim:set ts=4 sw=4 sts=4 expandtab:
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