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Crypto
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SelfTest
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Hash
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Filename :
test_cSHAKE.py
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# =================================================================== # 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. # =================================================================== """Self-test suite for Crypto.Hash.cSHAKE128 and cSHAKE256""" import unittest from Crypto.SelfTest.loader import load_test_vectors from Crypto.SelfTest.st_common import list_test_cases from Crypto.Hash import cSHAKE128, cSHAKE256, SHAKE128, SHAKE256 from Crypto.Util.py3compat import b, bchr, tobytes class cSHAKETest(unittest.TestCase): def test_left_encode(self): from Crypto.Hash.cSHAKE128 import _left_encode self.assertEqual(_left_encode(0), b'\x01\x00') self.assertEqual(_left_encode(1), b'\x01\x01') self.assertEqual(_left_encode(256), b'\x02\x01\x00') def test_bytepad(self): from Crypto.Hash.cSHAKE128 import _bytepad self.assertEqual(_bytepad(b'', 4), b'\x01\x04\x00\x00') self.assertEqual(_bytepad(b'A', 4), b'\x01\x04A\x00') self.assertEqual(_bytepad(b'AA', 4), b'\x01\x04AA') self.assertEqual(_bytepad(b'AAA', 4), b'\x01\x04AAA\x00\x00\x00') self.assertEqual(_bytepad(b'AAAA', 4), b'\x01\x04AAAA\x00\x00') self.assertEqual(_bytepad(b'AAAAA', 4), b'\x01\x04AAAAA\x00') self.assertEqual(_bytepad(b'AAAAAA', 4), b'\x01\x04AAAAAA') self.assertEqual(_bytepad(b'AAAAAAA', 4), b'\x01\x04AAAAAAA\x00\x00\x00') def test_new_positive(self): xof1 = self.cshake.new() xof2 = self.cshake.new(data=b("90")) xof3 = self.cshake.new().update(b("90")) self.assertNotEqual(xof1.read(10), xof2.read(10)) xof3.read(10) self.assertEqual(xof2.read(10), xof3.read(10)) xof1 = self.cshake.new() ref = xof1.read(10) xof2 = self.cshake.new(custom=b("")) xof3 = self.cshake.new(custom=b("foo")) self.assertEqual(ref, xof2.read(10)) self.assertNotEqual(ref, xof3.read(10)) xof1 = self.cshake.new(custom=b("foo")) xof2 = self.cshake.new(custom=b("foo"), data=b("90")) xof3 = self.cshake.new(custom=b("foo")).update(b("90")) self.assertNotEqual(xof1.read(10), xof2.read(10)) xof3.read(10) self.assertEqual(xof2.read(10), xof3.read(10)) def test_update(self): pieces = [bchr(10) * 200, bchr(20) * 300] h = self.cshake.new() h.update(pieces[0]).update(pieces[1]) digest = h.read(10) h = self.cshake.new() h.update(pieces[0] + pieces[1]) self.assertEqual(h.read(10), digest) def test_update_negative(self): h = self.cshake.new() self.assertRaises(TypeError, h.update, u"string") def test_digest(self): h = self.cshake.new() digest = h.read(90) # read returns a byte string of the right length self.assertTrue(isinstance(digest, type(b("digest")))) self.assertEqual(len(digest), 90) def test_update_after_read(self): mac = self.cshake.new() mac.update(b("rrrr")) mac.read(90) self.assertRaises(TypeError, mac.update, b("ttt")) def test_shake(self): # When no customization string is passed, results must match SHAKE for digest_len in range(64): xof1 = self.cshake.new(b'TEST') xof2 = self.shake.new(b'TEST') self.assertEqual(xof1.read(digest_len), xof2.read(digest_len)) class cSHAKE128Test(cSHAKETest): cshake = cSHAKE128 shake = SHAKE128 class cSHAKE256Test(cSHAKETest): cshake = cSHAKE256 shake = SHAKE256 class cSHAKEVectors(unittest.TestCase): pass vector_files = [("ShortMsgSamples_cSHAKE128.txt", "Short Message Samples cSHAKE128", "128_cshake", cSHAKE128), ("ShortMsgSamples_cSHAKE256.txt", "Short Message Samples cSHAKE256", "256_cshake", cSHAKE256), ("CustomMsgSamples_cSHAKE128.txt", "Custom Message Samples cSHAKE128", "custom_128_cshake", cSHAKE128), ("CustomMsgSamples_cSHAKE256.txt", "Custom Message Samples cSHAKE256", "custom_256_cshake", cSHAKE256), ] for file, descr, tag, test_class in vector_files: test_vectors = load_test_vectors(("Hash", "SHA3"), file, descr, {"len": lambda x: int(x), "nlen": lambda x: int(x), "slen": lambda x: int(x)}) or [] for idx, tv in enumerate(test_vectors): if getattr(tv, "len", 0) == 0: data = b("") else: data = tobytes(tv.msg) assert(tv.len == len(tv.msg)*8) if getattr(tv, "nlen", 0) != 0: raise ValueError("Unsupported cSHAKE test vector") if getattr(tv, "slen", 0) == 0: custom = b("") else: custom = tobytes(tv.s) assert(tv.slen == len(tv.s)*8) def new_test(self, data=data, result=tv.md, custom=custom, test_class=test_class): hobj = test_class.new(data=data, custom=custom) digest = hobj.read(len(result)) self.assertEqual(digest, result) setattr(cSHAKEVectors, "test_%s_%d" % (tag, idx), new_test) def get_tests(config={}): tests = [] tests += list_test_cases(cSHAKE128Test) tests += list_test_cases(cSHAKE256Test) tests += list_test_cases(cSHAKEVectors) return tests if __name__ == '__main__': import unittest suite = lambda: unittest.TestSuite(get_tests()) unittest.main(defaultTest='suite')