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144 lines
6.2 KiB
144 lines
6.2 KiB
# -*- coding: utf-8 -*-
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#
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# SelfTest/Util/test_number.py: Self-test for parts of the Crypto.Util.number 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 (some of) Crypto.Util.number"""
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from Crypto.Util.py3compat import *
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import unittest
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class MyError(Exception):
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"""Dummy exception used for tests"""
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# NB: In some places, we compare tuples instead of just output values so that
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# if any inputs cause a test failure, we'll be able to tell which ones.
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class MiscTests(unittest.TestCase):
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def setUp(self):
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global number, math
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from Crypto.Util import number
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import math
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def test_ceil_div(self):
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"""Util.number.ceil_div"""
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self.assertRaises(TypeError, number.ceil_div, "1", 1)
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self.assertRaises(ZeroDivisionError, number.ceil_div, 1, 0)
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self.assertRaises(ZeroDivisionError, number.ceil_div, -1, 0)
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# b = 1
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self.assertEqual(0, number.ceil_div(0, 1))
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self.assertEqual(1, number.ceil_div(1, 1))
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self.assertEqual(2, number.ceil_div(2, 1))
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self.assertEqual(3, number.ceil_div(3, 1))
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# b = 2
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self.assertEqual(0, number.ceil_div(0, 2))
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self.assertEqual(1, number.ceil_div(1, 2))
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self.assertEqual(1, number.ceil_div(2, 2))
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self.assertEqual(2, number.ceil_div(3, 2))
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self.assertEqual(2, number.ceil_div(4, 2))
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self.assertEqual(3, number.ceil_div(5, 2))
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# b = 3
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self.assertEqual(0, number.ceil_div(0, 3))
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self.assertEqual(1, number.ceil_div(1, 3))
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self.assertEqual(1, number.ceil_div(2, 3))
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self.assertEqual(1, number.ceil_div(3, 3))
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self.assertEqual(2, number.ceil_div(4, 3))
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self.assertEqual(2, number.ceil_div(5, 3))
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self.assertEqual(2, number.ceil_div(6, 3))
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self.assertEqual(3, number.ceil_div(7, 3))
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# b = 4
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self.assertEqual(0, number.ceil_div(0, 4))
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self.assertEqual(1, number.ceil_div(1, 4))
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self.assertEqual(1, number.ceil_div(2, 4))
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self.assertEqual(1, number.ceil_div(3, 4))
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self.assertEqual(1, number.ceil_div(4, 4))
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self.assertEqual(2, number.ceil_div(5, 4))
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self.assertEqual(2, number.ceil_div(6, 4))
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self.assertEqual(2, number.ceil_div(7, 4))
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self.assertEqual(2, number.ceil_div(8, 4))
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self.assertEqual(3, number.ceil_div(9, 4))
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def test_getStrongPrime(self):
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"""Util.number.getStrongPrime"""
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self.assertRaises(ValueError, number.getStrongPrime, 256)
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self.assertRaises(ValueError, number.getStrongPrime, 513)
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bits = 512
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x = number.getStrongPrime(bits)
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self.assertNotEqual(x % 2, 0)
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self.assertEqual(x > (1 << bits-1)-1, 1)
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self.assertEqual(x < (1 << bits), 1)
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e = 2**16+1
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x = number.getStrongPrime(bits, e)
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self.assertEqual(number.GCD(x-1, e), 1)
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self.assertNotEqual(x % 2, 0)
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self.assertEqual(x > (1 << bits-1)-1, 1)
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self.assertEqual(x < (1 << bits), 1)
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e = 2**16+2
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x = number.getStrongPrime(bits, e)
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self.assertEqual(number.GCD((x-1)>>1, e), 1)
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self.assertNotEqual(x % 2, 0)
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self.assertEqual(x > (1 << bits-1)-1, 1)
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self.assertEqual(x < (1 << bits), 1)
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def test_isPrime(self):
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"""Util.number.isPrime"""
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self.assertEqual(number.isPrime(-3), False) # Regression test: negative numbers should not be prime
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self.assertEqual(number.isPrime(-2), False) # Regression test: negative numbers should not be prime
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self.assertEqual(number.isPrime(1), False) # Regression test: isPrime(1) caused some versions of PyCrypto to crash.
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self.assertEqual(number.isPrime(2), True)
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self.assertEqual(number.isPrime(3), True)
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self.assertEqual(number.isPrime(4), False)
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self.assertEqual(number.isPrime(2**1279-1), True)
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self.assertEqual(number.isPrime(-(2**1279-1)), False) # Regression test: negative numbers should not be prime
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# test some known gmp pseudo-primes taken from
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# http://www.trnicely.net/misc/mpzspsp.html
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for composite in (43 * 127 * 211, 61 * 151 * 211, 15259 * 30517,
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346141 * 692281, 1007119 * 2014237, 3589477 * 7178953,
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4859419 * 9718837, 2730439 * 5460877,
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245127919 * 490255837, 963939391 * 1927878781,
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4186358431 * 8372716861, 1576820467 * 3153640933):
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self.assertEqual(number.isPrime(int(composite)), False)
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def test_size(self):
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self.assertEqual(number.size(2),2)
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self.assertEqual(number.size(3),2)
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self.assertEqual(number.size(0xa2),8)
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self.assertEqual(number.size(0xa2ba40),8*3)
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self.assertEqual(number.size(0xa2ba40ee07e3b2bd2f02ce227f36a195024486e49c19cb41bbbdfbba98b22b0e577c2eeaffa20d883a76e65e394c69d4b3c05a1e8fadda27edb2a42bc000fe888b9b32c22d15add0cd76b3e7936e19955b220dd17d4ea904b1ec102b2e4de7751222aa99151024c7cb41cc5ea21d00eeb41f7c800834d2c6e06bce3bce7ea9a5), 1024)
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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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tests = list_test_cases(MiscTests)
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return tests
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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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