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Edit File: test_strxor.py

# # SelfTest/Util/test_strxor.py: Self-test for XORing # # =================================================================== # # Copyright (c) 2014, Legrandin <helderijs@gmail.com> # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions # are met: # # 1. Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in # the documentation and/or other materials provided with the # distribution. # # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS # FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE # COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, # BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER # CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE # POSSIBILITY OF SUCH DAMAGE. # =================================================================== import unittest from binascii import unhexlify, hexlify from Crypto.SelfTest.st_common import list_test_cases from Crypto.Util.strxor import strxor, strxor_c class StrxorTests(unittest.TestCase): def test1(self): term1 = unhexlify(b"ff339a83e5cd4cdf5649") term2 = unhexlify(b"383d4ba020573314395b") result = unhexlify(b"c70ed123c59a7fcb6f12") self.assertEqual(strxor(term1, term2), result) self.assertEqual(strxor(term2, term1), result) def test2(self): es = b"" self.assertEqual(strxor(es, es), es) def test3(self): term1 = unhexlify(b"ff339a83e5cd4cdf5649") all_zeros = b"\x00" * len(term1) self.assertEqual(strxor(term1, term1), all_zeros) def test_wrong_length(self): term1 = unhexlify(b"ff339a83e5cd4cdf5649") term2 = unhexlify(b"ff339a83e5cd4cdf564990") self.assertRaises(ValueError, strxor, term1, term2) def test_bytearray(self): term1 = unhexlify(b"ff339a83e5cd4cdf5649") term1_ba = bytearray(term1) term2 = unhexlify(b"383d4ba020573314395b") result = unhexlify(b"c70ed123c59a7fcb6f12") self.assertEqual(strxor(term1_ba, term2), result) def test_memoryview(self): term1 = unhexlify(b"ff339a83e5cd4cdf5649") term1_mv = memoryview(term1) term2 = unhexlify(b"383d4ba020573314395b") result = unhexlify(b"c70ed123c59a7fcb6f12") self.assertEqual(strxor(term1_mv, term2), result) def test_output_bytearray(self): """Verify result can be stored in pre-allocated memory""" term1 = unhexlify(b"ff339a83e5cd4cdf5649") term2 = unhexlify(b"383d4ba020573314395b") original_term1 = term1[:] original_term2 = term2[:] expected_xor = unhexlify(b"c70ed123c59a7fcb6f12") output = bytearray(len(term1)) result = strxor(term1, term2, output=output) self.assertEqual(result, None) self.assertEqual(output, expected_xor) self.assertEqual(term1, original_term1) self.assertEqual(term2, original_term2) def test_output_memoryview(self): """Verify result can be stored in pre-allocated memory""" term1 = unhexlify(b"ff339a83e5cd4cdf5649") term2 = unhexlify(b"383d4ba020573314395b") original_term1 = term1[:] original_term2 = term2[:] expected_xor = unhexlify(b"c70ed123c59a7fcb6f12") output = memoryview(bytearray(len(term1))) result = strxor(term1, term2, output=output) self.assertEqual(result, None) self.assertEqual(output, expected_xor) self.assertEqual(term1, original_term1) self.assertEqual(term2, original_term2) def test_output_overlapping_bytearray(self): """Verify result can be stored in overlapping memory""" term1 = bytearray(unhexlify(b"ff339a83e5cd4cdf5649")) term2 = unhexlify(b"383d4ba020573314395b") original_term2 = term2[:] expected_xor = unhexlify(b"c70ed123c59a7fcb6f12") result = strxor(term1, term2, output=term1) self.assertEqual(result, None) self.assertEqual(term1, expected_xor) self.assertEqual(term2, original_term2) def test_output_overlapping_memoryview(self): """Verify result can be stored in overlapping memory""" term1 = memoryview(bytearray(unhexlify(b"ff339a83e5cd4cdf5649"))) term2 = unhexlify(b"383d4ba020573314395b") original_term2 = term2[:] expected_xor = unhexlify(b"c70ed123c59a7fcb6f12") result = strxor(term1, term2, output=term1) self.assertEqual(result, None) self.assertEqual(term1, expected_xor) self.assertEqual(term2, original_term2) def test_output_ro_bytes(self): """Verify result cannot be stored in read-only memory""" term1 = unhexlify(b"ff339a83e5cd4cdf5649") term2 = unhexlify(b"383d4ba020573314395b") self.assertRaises(TypeError, strxor, term1, term2, output=term1) def test_output_ro_memoryview(self): """Verify result cannot be stored in read-only memory""" term1 = memoryview(unhexlify(b"ff339a83e5cd4cdf5649")) term2 = unhexlify(b"383d4ba020573314395b") self.assertRaises(TypeError, strxor, term1, term2, output=term1) def test_output_incorrect_length(self): """Verify result cannot be stored in memory of incorrect length""" term1 = unhexlify(b"ff339a83e5cd4cdf5649") term2 = unhexlify(b"383d4ba020573314395b") output = bytearray(len(term1) - 1) self.assertRaises(ValueError, strxor, term1, term2, output=output) class Strxor_cTests(unittest.TestCase): def test1(self): term1 = unhexlify(b"ff339a83e5cd4cdf5649") result = unhexlify(b"be72dbc2a48c0d9e1708") self.assertEqual(strxor_c(term1, 65), result) def test2(self): term1 = unhexlify(b"ff339a83e5cd4cdf5649") self.assertEqual(strxor_c(term1, 0), term1) def test3(self): self.assertEqual(strxor_c(b"", 90), b"") def test_wrong_range(self): term1 = unhexlify(b"ff339a83e5cd4cdf5649") self.assertRaises(ValueError, strxor_c, term1, -1) self.assertRaises(ValueError, strxor_c, term1, 256) def test_bytearray(self): term1 = unhexlify(b"ff339a83e5cd4cdf5649") term1_ba = bytearray(term1) result = unhexlify(b"be72dbc2a48c0d9e1708") self.assertEqual(strxor_c(term1_ba, 65), result) def test_memoryview(self): term1 = unhexlify(b"ff339a83e5cd4cdf5649") term1_mv = memoryview(term1) result = unhexlify(b"be72dbc2a48c0d9e1708") self.assertEqual(strxor_c(term1_mv, 65), result) def test_output_bytearray(self): term1 = unhexlify(b"ff339a83e5cd4cdf5649") original_term1 = term1[:] expected_result = unhexlify(b"be72dbc2a48c0d9e1708") output = bytearray(len(term1)) result = strxor_c(term1, 65, output=output) self.assertEqual(result, None) self.assertEqual(output, expected_result) self.assertEqual(term1, original_term1) def test_output_memoryview(self): term1 = unhexlify(b"ff339a83e5cd4cdf5649") original_term1 = term1[:] expected_result = unhexlify(b"be72dbc2a48c0d9e1708") output = memoryview(bytearray(len(term1))) result = strxor_c(term1, 65, output=output) self.assertEqual(result, None) self.assertEqual(output, expected_result) self.assertEqual(term1, original_term1) def test_output_overlapping_bytearray(self): """Verify result can be stored in overlapping memory""" term1 = bytearray(unhexlify(b"ff339a83e5cd4cdf5649")) expected_xor = unhexlify(b"be72dbc2a48c0d9e1708") result = strxor_c(term1, 65, output=term1) self.assertEqual(result, None) self.assertEqual(term1, expected_xor) def test_output_overlapping_memoryview(self): """Verify result can be stored in overlapping memory""" term1 = memoryview(bytearray(unhexlify(b"ff339a83e5cd4cdf5649"))) expected_xor = unhexlify(b"be72dbc2a48c0d9e1708") result = strxor_c(term1, 65, output=term1) self.assertEqual(result, None) self.assertEqual(term1, expected_xor) def test_output_ro_bytes(self): """Verify result cannot be stored in read-only memory""" term1 = unhexlify(b"ff339a83e5cd4cdf5649") self.assertRaises(TypeError, strxor_c, term1, 65, output=term1) def test_output_ro_memoryview(self): """Verify result cannot be stored in read-only memory""" term1 = memoryview(unhexlify(b"ff339a83e5cd4cdf5649")) term2 = unhexlify(b"383d4ba020573314395b") self.assertRaises(TypeError, strxor_c, term1, 65, output=term1) def test_output_incorrect_length(self): """Verify result cannot be stored in memory of incorrect length""" term1 = unhexlify(b"ff339a83e5cd4cdf5649") output = bytearray(len(term1) - 1) self.assertRaises(ValueError, strxor_c, term1, 65, output=output) def get_tests(config={}): tests = [] tests += list_test_cases(StrxorTests) tests += list_test_cases(Strxor_cTests) return tests if __name__ == '__main__': suite = lambda: unittest.TestSuite(get_tests()) unittest.main(defaultTest='suite')