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Diffstat (limited to 'lib/Python/Lib/Crypto/SelfTest/Util/test_Counter.py')
| -rw-r--r-- | lib/Python/Lib/Crypto/SelfTest/Util/test_Counter.py | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/lib/Python/Lib/Crypto/SelfTest/Util/test_Counter.py b/lib/Python/Lib/Crypto/SelfTest/Util/test_Counter.py new file mode 100644 index 000000000..33c9bd7d5 --- /dev/null +++ b/lib/Python/Lib/Crypto/SelfTest/Util/test_Counter.py @@ -0,0 +1,165 @@ +# -*- 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: |