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296 lines
10 KiB
296 lines
10 KiB
#
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# SelfTest/Util/test_strxor.py: Self-test for XORing
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#
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# ===================================================================
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#
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# Copyright (c) 2014, Legrandin <helderijs@gmail.com>
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in
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# the documentation and/or other materials provided with the
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# distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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# ===================================================================
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import unittest
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from binascii import unhexlify, hexlify
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from Crypto.SelfTest.st_common import list_test_cases
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from Crypto.Util.strxor import strxor, strxor_c
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class StrxorTests(unittest.TestCase):
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def test1(self):
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term1 = unhexlify(b"ff339a83e5cd4cdf5649")
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term2 = unhexlify(b"383d4ba020573314395b")
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result = unhexlify(b"c70ed123c59a7fcb6f12")
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self.assertEqual(strxor(term1, term2), result)
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self.assertEqual(strxor(term2, term1), result)
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def test2(self):
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es = b""
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self.assertEqual(strxor(es, es), es)
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def test3(self):
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term1 = unhexlify(b"ff339a83e5cd4cdf5649")
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all_zeros = b"\x00" * len(term1)
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self.assertEqual(strxor(term1, term1), all_zeros)
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def test_wrong_length(self):
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term1 = unhexlify(b"ff339a83e5cd4cdf5649")
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term2 = unhexlify(b"ff339a83e5cd4cdf564990")
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self.assertRaises(ValueError, strxor, term1, term2)
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def test_bytearray(self):
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term1 = unhexlify(b"ff339a83e5cd4cdf5649")
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term1_ba = bytearray(term1)
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term2 = unhexlify(b"383d4ba020573314395b")
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result = unhexlify(b"c70ed123c59a7fcb6f12")
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self.assertEqual(strxor(term1_ba, term2), result)
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def test_memoryview(self):
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term1 = unhexlify(b"ff339a83e5cd4cdf5649")
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term1_mv = memoryview(term1)
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term2 = unhexlify(b"383d4ba020573314395b")
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result = unhexlify(b"c70ed123c59a7fcb6f12")
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self.assertEqual(strxor(term1_mv, term2), result)
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def test_output_bytearray(self):
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"""Verify result can be stored in pre-allocated memory"""
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term1 = unhexlify(b"ff339a83e5cd4cdf5649")
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term2 = unhexlify(b"383d4ba020573314395b")
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original_term1 = term1[:]
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original_term2 = term2[:]
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expected_xor = unhexlify(b"c70ed123c59a7fcb6f12")
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output = bytearray(len(term1))
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result = strxor(term1, term2, output=output)
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self.assertEqual(result, None)
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self.assertEqual(output, expected_xor)
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self.assertEqual(term1, original_term1)
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self.assertEqual(term2, original_term2)
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def test_output_memoryview(self):
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"""Verify result can be stored in pre-allocated memory"""
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term1 = unhexlify(b"ff339a83e5cd4cdf5649")
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term2 = unhexlify(b"383d4ba020573314395b")
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original_term1 = term1[:]
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original_term2 = term2[:]
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expected_xor = unhexlify(b"c70ed123c59a7fcb6f12")
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output = memoryview(bytearray(len(term1)))
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result = strxor(term1, term2, output=output)
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self.assertEqual(result, None)
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self.assertEqual(output, expected_xor)
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self.assertEqual(term1, original_term1)
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self.assertEqual(term2, original_term2)
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def test_output_overlapping_bytearray(self):
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"""Verify result can be stored in overlapping memory"""
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term1 = bytearray(unhexlify(b"ff339a83e5cd4cdf5649"))
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term2 = unhexlify(b"383d4ba020573314395b")
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original_term2 = term2[:]
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expected_xor = unhexlify(b"c70ed123c59a7fcb6f12")
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result = strxor(term1, term2, output=term1)
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self.assertEqual(result, None)
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self.assertEqual(term1, expected_xor)
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self.assertEqual(term2, original_term2)
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def test_output_overlapping_memoryview(self):
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"""Verify result can be stored in overlapping memory"""
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term1 = memoryview(bytearray(unhexlify(b"ff339a83e5cd4cdf5649")))
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term2 = unhexlify(b"383d4ba020573314395b")
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original_term2 = term2[:]
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expected_xor = unhexlify(b"c70ed123c59a7fcb6f12")
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result = strxor(term1, term2, output=term1)
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self.assertEqual(result, None)
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self.assertEqual(term1, expected_xor)
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self.assertEqual(term2, original_term2)
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def test_output_ro_bytes(self):
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"""Verify result cannot be stored in read-only memory"""
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term1 = unhexlify(b"ff339a83e5cd4cdf5649")
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term2 = unhexlify(b"383d4ba020573314395b")
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self.assertRaises(TypeError, strxor, term1, term2, output=term1)
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def test_output_ro_memoryview(self):
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"""Verify result cannot be stored in read-only memory"""
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term1 = memoryview(unhexlify(b"ff339a83e5cd4cdf5649"))
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term2 = unhexlify(b"383d4ba020573314395b")
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self.assertRaises(TypeError, strxor, term1, term2, output=term1)
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def test_output_incorrect_length(self):
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"""Verify result cannot be stored in memory of incorrect length"""
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term1 = unhexlify(b"ff339a83e5cd4cdf5649")
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term2 = unhexlify(b"383d4ba020573314395b")
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output = bytearray(len(term1) - 1)
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self.assertRaises(ValueError, strxor, term1, term2, output=output)
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import sys
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if sys.version[:3] == "2.6":
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del test_memoryview
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del test_output_memoryview
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del test_output_overlapping_memoryview
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del test_output_ro_memoryview
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class Strxor_cTests(unittest.TestCase):
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def test1(self):
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term1 = unhexlify(b"ff339a83e5cd4cdf5649")
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result = unhexlify(b"be72dbc2a48c0d9e1708")
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self.assertEqual(strxor_c(term1, 65), result)
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def test2(self):
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term1 = unhexlify(b"ff339a83e5cd4cdf5649")
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self.assertEqual(strxor_c(term1, 0), term1)
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def test3(self):
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self.assertEqual(strxor_c(b"", 90), b"")
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def test_wrong_range(self):
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term1 = unhexlify(b"ff339a83e5cd4cdf5649")
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self.assertRaises(ValueError, strxor_c, term1, -1)
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self.assertRaises(ValueError, strxor_c, term1, 256)
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def test_bytearray(self):
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term1 = unhexlify(b"ff339a83e5cd4cdf5649")
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term1_ba = bytearray(term1)
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result = unhexlify(b"be72dbc2a48c0d9e1708")
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self.assertEqual(strxor_c(term1_ba, 65), result)
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def test_memoryview(self):
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term1 = unhexlify(b"ff339a83e5cd4cdf5649")
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term1_mv = memoryview(term1)
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result = unhexlify(b"be72dbc2a48c0d9e1708")
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self.assertEqual(strxor_c(term1_mv, 65), result)
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def test_output_bytearray(self):
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term1 = unhexlify(b"ff339a83e5cd4cdf5649")
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original_term1 = term1[:]
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expected_result = unhexlify(b"be72dbc2a48c0d9e1708")
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output = bytearray(len(term1))
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result = strxor_c(term1, 65, output=output)
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self.assertEqual(result, None)
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self.assertEqual(output, expected_result)
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self.assertEqual(term1, original_term1)
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def test_output_memoryview(self):
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term1 = unhexlify(b"ff339a83e5cd4cdf5649")
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original_term1 = term1[:]
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expected_result = unhexlify(b"be72dbc2a48c0d9e1708")
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output = memoryview(bytearray(len(term1)))
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result = strxor_c(term1, 65, output=output)
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self.assertEqual(result, None)
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self.assertEqual(output, expected_result)
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self.assertEqual(term1, original_term1)
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def test_output_overlapping_bytearray(self):
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"""Verify result can be stored in overlapping memory"""
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term1 = bytearray(unhexlify(b"ff339a83e5cd4cdf5649"))
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expected_xor = unhexlify(b"be72dbc2a48c0d9e1708")
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result = strxor_c(term1, 65, output=term1)
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self.assertEqual(result, None)
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self.assertEqual(term1, expected_xor)
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def test_output_overlapping_memoryview(self):
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"""Verify result can be stored in overlapping memory"""
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term1 = memoryview(bytearray(unhexlify(b"ff339a83e5cd4cdf5649")))
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expected_xor = unhexlify(b"be72dbc2a48c0d9e1708")
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result = strxor_c(term1, 65, output=term1)
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self.assertEqual(result, None)
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self.assertEqual(term1, expected_xor)
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def test_output_ro_bytes(self):
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"""Verify result cannot be stored in read-only memory"""
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term1 = unhexlify(b"ff339a83e5cd4cdf5649")
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self.assertRaises(TypeError, strxor_c, term1, 65, output=term1)
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def test_output_ro_memoryview(self):
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"""Verify result cannot be stored in read-only memory"""
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term1 = memoryview(unhexlify(b"ff339a83e5cd4cdf5649"))
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term2 = unhexlify(b"383d4ba020573314395b")
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self.assertRaises(TypeError, strxor_c, term1, 65, output=term1)
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def test_output_incorrect_length(self):
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"""Verify result cannot be stored in memory of incorrect length"""
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term1 = unhexlify(b"ff339a83e5cd4cdf5649")
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output = bytearray(len(term1) - 1)
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self.assertRaises(ValueError, strxor_c, term1, 65, output=output)
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import sys
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if sys.version[:3] == "2.6":
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del test_memoryview
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del test_output_memoryview
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del test_output_overlapping_memoryview
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del test_output_ro_memoryview
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def get_tests(config={}):
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tests = []
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tests += list_test_cases(StrxorTests)
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tests += list_test_cases(Strxor_cTests)
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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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