EVOLUTION-MANAGER

Edit File: test_Counter.py

# -*- coding: utf-8 -*- # # SelfTest/Util/test_Counter: Self-test for the Crypto.Util.Counter module # # Written in 2009 by Dwayne C. Litzenberger <dlitz@dlitz.net> # # =================================================================== # The contents of this file are dedicated to the public domain. To # the extent that dedication to the public domain is not available, # everyone is granted a worldwide, perpetual, royalty-free, # non-exclusive license to exercise all rights associated with the # contents of this file for any purpose whatsoever. # No rights are reserved. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS # BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN # ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE # SOFTWARE. # =================================================================== """Self-tests for Crypto.Util.Counter""" __revision__ = "$Id$" import sys if sys.version_info[0] == 2 and sys.version_info[1] == 1: from Crypto.Util.py21compat import * from Crypto.Util.py3compat import * import unittest class CounterTests(unittest.TestCase): def setUp(self): global Counter from Crypto.Util import Counter def test_BE_shortcut(self): """Big endian, shortcut enabled""" c = Counter.new(128) self.assertEqual(c.__PCT_CTR_SHORTCUT__,True) # assert_ c = Counter.new(128, little_endian=False) self.assertEqual(c.__PCT_CTR_SHORTCUT__,True) # assert_ c = Counter.new(128, disable_shortcut=False) self.assertEqual(c.__PCT_CTR_SHORTCUT__,True) # assert_ c = Counter.new(128, little_endian=False, disable_shortcut=False) self.assertEqual(c.__PCT_CTR_SHORTCUT__,True) # assert_ def test_LE_shortcut(self): """Little endian, shortcut enabled""" c = Counter.new(128, little_endian=True) self.assertEqual(c.__PCT_CTR_SHORTCUT__,True) # assert_ c = Counter.new(128, little_endian=True, disable_shortcut=False) self.assertEqual(c.__PCT_CTR_SHORTCUT__,True) # assert_ def test_BE_no_shortcut(self): """Big endian, shortcut disabled""" c = Counter.new(128, disable_shortcut=True) self.assertRaises(AttributeError, getattr, c, '__PCT_CTR_SHORTCUT__') c = Counter.new(128, little_endian=False, disable_shortcut=True) self.assertRaises(AttributeError, getattr, c, '__PCT_CTR_SHORTCUT__') def test_LE_no_shortcut(self): """Little endian, shortcut disabled""" c = Counter.new(128, little_endian=True, disable_shortcut=True) self.assertRaises(AttributeError, getattr, c, '__PCT_CTR_SHORTCUT__') def test_BE_defaults(self): """128-bit, Big endian, defaults""" c = Counter.new(128) self.assertEqual(1, c.next_value()) self.assertEqual(b("\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01"), c()) self.assertEqual(2, c.next_value()) self.assertEqual(b("\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02"), c()) for i in xrange(3, 256): self.assertEqual(i, c.next_value()) self.assertEqual(b("\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00")+bchr(i), c()) self.assertEqual(256, c.next_value()) self.assertEqual(b("\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00"), c()) def test_LE_defaults(self): """128-bit, Little endian, defaults""" c = Counter.new(128, little_endian=True) self.assertEqual(1, c.next_value()) self.assertEqual(b("\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"), c()) self.assertEqual(2, c.next_value()) self.assertEqual(b("\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"), c()) for i in xrange(3, 256): self.assertEqual(i, c.next_value()) self.assertEqual(bchr(i)+b("\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"), c()) self.assertEqual(256, c.next_value()) self.assertEqual(b("\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"), c()) def test_BE8_wraparound(self): """8-bit, Big endian, wraparound""" c = Counter.new(8) for i in xrange(1, 256): self.assertEqual(i, c.next_value()) self.assertEqual(bchr(i), c()) self.assertRaises(OverflowError, c.next_value) self.assertRaises(OverflowError, c) self.assertRaises(OverflowError, c.next_value) self.assertRaises(OverflowError, c) def test_LE8_wraparound(self): """8-bit, Little endian, wraparound""" c = Counter.new(8, little_endian=True) for i in xrange(1, 256): self.assertEqual(i, c.next_value()) self.assertEqual(bchr(i), c()) self.assertRaises(OverflowError, c.next_value) self.assertRaises(OverflowError, c) self.assertRaises(OverflowError, c.next_value) self.assertRaises(OverflowError, c) def test_BE8_wraparound_allowed(self): """8-bit, Big endian, wraparound with allow_wraparound=True""" c = Counter.new(8, allow_wraparound=True) for i in xrange(1, 256): self.assertEqual(i, c.next_value()) self.assertEqual(bchr(i), c()) self.assertEqual(0, c.next_value()) self.assertEqual(b("\x00"), c()) self.assertEqual(1, c.next_value()) def test_LE8_wraparound_allowed(self): """8-bit, Little endian, wraparound with allow_wraparound=True""" c = Counter.new(8, little_endian=True, allow_wraparound=True) for i in xrange(1, 256): self.assertEqual(i, c.next_value()) self.assertEqual(bchr(i), c()) self.assertEqual(0, c.next_value()) self.assertEqual(b("\x00"), c()) self.assertEqual(1, c.next_value()) def test_BE8_carry(self): """8-bit, Big endian, carry attribute""" c = Counter.new(8) for i in xrange(1, 256): self.assertEqual(0, c.carry) self.assertEqual(i, c.next_value()) self.assertEqual(bchr(i), c()) self.assertEqual(1, c.carry) def test_LE8_carry(self): """8-bit, Little endian, carry attribute""" c = Counter.new(8, little_endian=True) for i in xrange(1, 256): self.assertEqual(0, c.carry) self.assertEqual(i, c.next_value()) self.assertEqual(bchr(i), c()) self.assertEqual(1, c.carry) def get_tests(config={}): from Crypto.SelfTest.st_common import list_test_cases return list_test_cases(CounterTests) if __name__ == '__main__': suite = lambda: unittest.TestSuite(get_tests()) unittest.main(defaultTest='suite') # vim:set ts=4 sw=4 sts=4 expandtab: