import unittest from binascii import unhexlify, hexlify from Crypto.Util.py3compat import tobytes from Crypto.SelfTest.st_common import list_test_cases from Crypto.Hash import TupleHash128, TupleHash256 class TupleHashTest(unittest.TestCase): def new(self, *args, **kwargs): return self.TupleHash.new(*args, **kwargs) def test_new_positive(self): h = self.new() for new_func in self.TupleHash.new, h.new: for dbits in range(64, 1024 + 1, 8): hobj = new_func(digest_bits=dbits) self.assertEqual(hobj.digest_size * 8, dbits) for dbytes in range(8, 128 + 1): hobj = new_func(digest_bytes=dbytes) self.assertEqual(hobj.digest_size, dbytes) hobj = h.new() self.assertEqual(hobj.digest_size, self.default_bytes) def test_new_negative(self): h = self.new() for new_func in self.TupleHash.new, h.new: self.assertRaises(TypeError, new_func, digest_bytes=self.minimum_bytes, digest_bits=self.minimum_bits) self.assertRaises(ValueError, new_func, digest_bytes=0) self.assertRaises(ValueError, new_func, digest_bits=self.minimum_bits + 7) self.assertRaises(ValueError, new_func, digest_bits=self.minimum_bits - 8) self.assertRaises(ValueError, new_func, digest_bits=self.minimum_bytes - 1) def test_default_digest_size(self): digest = self.new().digest() self.assertEqual(len(digest), self.default_bytes) def test_update(self): h = self.new() h.update(b'') h.digest() h = self.new() h.update(b'') h.update(b'STRING1') h.update(b'STRING2') mac1 = h.digest() h = self.new() h.update(b'STRING1') h.update(b'STRING2') mac2 = h.digest() self.assertNotEqual(mac1, mac2) def test_update_negative(self): h = self.new() self.assertRaises(TypeError, h.update, u"string") self.assertRaises(TypeError, h.update, None) def test_digest(self): h = self.new() digest = h.digest() # hexdigest does not change the state self.assertEqual(h.digest(), digest) # digest returns a byte string self.assertTrue(isinstance(digest, type(b"digest"))) def test_update_after_digest(self): msg = b"rrrrttt" # Normally, update() cannot be done after digest() h = self.new() h.update(msg) dig1 = h.digest() self.assertRaises(TypeError, h.update, dig1) def test_hex_digest(self): mac = self.new() digest = mac.digest() hexdigest = mac.hexdigest() # hexdigest is equivalent to digest self.assertEqual(hexlify(digest), tobytes(hexdigest)) # hexdigest does not change the state self.assertEqual(mac.hexdigest(), hexdigest) # hexdigest returns a string self.assertTrue(isinstance(hexdigest, type("digest"))) def test_bytearray(self): data = b"\x00\x01\x02" # Data can be a bytearray (during operation) data_ba = bytearray(data) h1 = self.new() h2 = self.new() h1.update(data) h2.update(data_ba) data_ba[:1] = b'\xFF' self.assertEqual(h1.digest(), h2.digest()) def test_memoryview(self): data = b"\x00\x01\x02" def get_mv_ro(data): return memoryview(data) def get_mv_rw(data): return memoryview(bytearray(data)) for get_mv in (get_mv_ro, get_mv_rw): # Data can be a memoryview (during operation) data_mv = get_mv(data) h1 = self.new() h2 = self.new() h1.update(data) h2.update(data_mv) if not data_mv.readonly: data_mv[:1] = b'\xFF' self.assertEqual(h1.digest(), h2.digest()) class TupleHash128Test(TupleHashTest): TupleHash = TupleHash128 minimum_bytes = 8 default_bytes = 64 minimum_bits = 64 default_bits = 512 class TupleHash256Test(TupleHashTest): TupleHash = TupleHash256 minimum_bytes = 8 default_bytes = 64 minimum_bits = 64 default_bits = 512 class NISTExampleTestVectors(unittest.TestCase): # http://csrc.nist.gov/groups/ST/toolkit/documents/Examples/TupleHash_samples.pdf test_data = [ ( ( "00 01 02", "10 11 12 13 14 15", ), "", "C5 D8 78 6C 1A FB 9B 82 11 1A B3 4B 65 B2 C0 04" "8F A6 4E 6D 48 E2 63 26 4C E1 70 7D 3F FC 8E D1", "KMAC128 Sample #1 NIST", TupleHash128 ), ( ( "00 01 02", "10 11 12 13 14 15", ), "My Tuple App", "75 CD B2 0F F4 DB 11 54 E8 41 D7 58 E2 41 60 C5" "4B AE 86 EB 8C 13 E7 F5 F4 0E B3 55 88 E9 6D FB", "KMAC128 Sample #2 NIST", TupleHash128 ), ( ( "00 01 02", "10 11 12 13 14 15", "20 21 22 23 24 25 26 27 28", ), "My Tuple App", "E6 0F 20 2C 89 A2 63 1E DA 8D 4C 58 8C A5 FD 07" "F3 9E 51 51 99 8D EC CF 97 3A DB 38 04 BB 6E 84", "KMAC128 Sample #3 NIST", TupleHash128 ), ( ( "00 01 02", "10 11 12 13 14 15", ), "", "CF B7 05 8C AC A5 E6 68 F8 1A 12 A2 0A 21 95 CE" "97 A9 25 F1 DB A3 E7 44 9A 56 F8 22 01 EC 60 73" "11 AC 26 96 B1 AB 5E A2 35 2D F1 42 3B DE 7B D4" "BB 78 C9 AE D1 A8 53 C7 86 72 F9 EB 23 BB E1 94", "KMAC256 Sample #4 NIST", TupleHash256 ), ( ( "00 01 02", "10 11 12 13 14 15", ), "My Tuple App", "14 7C 21 91 D5 ED 7E FD 98 DB D9 6D 7A B5 A1 16" "92 57 6F 5F E2 A5 06 5F 3E 33 DE 6B BA 9F 3A A1" "C4 E9 A0 68 A2 89 C6 1C 95 AA B3 0A EE 1E 41 0B" "0B 60 7D E3 62 0E 24 A4 E3 BF 98 52 A1 D4 36 7E", "KMAC256 Sample #5 NIST", TupleHash256 ), ( ( "00 01 02", "10 11 12 13 14 15", "20 21 22 23 24 25 26 27 28", ), "My Tuple App", "45 00 0B E6 3F 9B 6B FD 89 F5 47 17 67 0F 69 A9" "BC 76 35 91 A4 F0 5C 50 D6 88 91 A7 44 BC C6 E7" "D6 D5 B5 E8 2C 01 8D A9 99 ED 35 B0 BB 49 C9 67" "8E 52 6A BD 8E 85 C1 3E D2 54 02 1D B9 E7 90 CE", "KMAC256 Sample #6 NIST", TupleHash256 ), ] def setUp(self): td = [] for tv_in in self.test_data: tv_out = [None] * len(tv_in) tv_out[0] = [] for string in tv_in[0]: tv_out[0].append(unhexlify(string.replace(" ", ""))) tv_out[1] = tobytes(tv_in[1]) # Custom tv_out[2] = unhexlify(tv_in[2].replace(" ", "")) tv_out[3] = tv_in[3] tv_out[4] = tv_in[4] td.append(tv_out) self.test_data = td def runTest(self): for data, custom, digest, text, module in self.test_data: hd = module.new(custom=custom, digest_bytes=len(digest)) for string in data: hd.update(string) self.assertEqual(hd.digest(), digest, msg=text) def get_tests(config={}): tests = [] tests += list_test_cases(TupleHash128Test) tests += list_test_cases(TupleHash256Test) tests.append(NISTExampleTestVectors()) return tests if __name__ == '__main__': def suite(): return unittest.TestSuite(get_tests()) unittest.main(defaultTest='suite')