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Editing: test_keccak.py
# =================================================================== # # Copyright (c) 2015, 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. # =================================================================== """Self-test suite for Crypto.Hash.keccak""" import unittest from binascii import hexlify, unhexlify from Crypto.SelfTest.loader import load_test_vectors from Crypto.SelfTest.st_common import list_test_cases from Crypto.Hash import keccak from Crypto.Util.py3compat import b, tobytes, bchr class KeccakTest(unittest.TestCase): def test_new_positive(self): for digest_bits in (224, 256, 384, 512): hobj = keccak.new(digest_bits=digest_bits) self.assertEqual(hobj.digest_size, digest_bits // 8) hobj2 = hobj.new() self.assertEqual(hobj2.digest_size, digest_bits // 8) for digest_bytes in (28, 32, 48, 64): hobj = keccak.new(digest_bytes=digest_bytes) self.assertEqual(hobj.digest_size, digest_bytes) hobj2 = hobj.new() self.assertEqual(hobj2.digest_size, digest_bytes) def test_new_positive2(self): digest1 = keccak.new(data=b("\x90"), digest_bytes=64).digest() digest2 = keccak.new(digest_bytes=64).update(b("\x90")).digest() self.assertEqual(digest1, digest2) def test_new_negative(self): # keccak.new needs digest size self.assertRaises(TypeError, keccak.new) h = keccak.new(digest_bits=512) # Either bits or bytes can be specified self.assertRaises(TypeError, keccak.new, digest_bytes=64, digest_bits=512) # Range self.assertRaises(ValueError, keccak.new, digest_bytes=0) self.assertRaises(ValueError, keccak.new, digest_bytes=1) self.assertRaises(ValueError, keccak.new, digest_bytes=65) self.assertRaises(ValueError, keccak.new, digest_bits=0) self.assertRaises(ValueError, keccak.new, digest_bits=1) self.assertRaises(ValueError, keccak.new, digest_bits=513) def test_update(self): pieces = [bchr(10) * 200, bchr(20) * 300] h = keccak.new(digest_bytes=64) h.update(pieces[0]).update(pieces[1]) digest = h.digest() h = keccak.new(digest_bytes=64) h.update(pieces[0] + pieces[1]) self.assertEqual(h.digest(), digest) def test_update_negative(self): h = keccak.new(digest_bytes=64) self.assertRaises(TypeError, h.update, u"string") def test_digest(self): h = keccak.new(digest_bytes=64) 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_hex_digest(self): mac = keccak.new(digest_bits=512) 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_update_after_digest(self): msg=b("rrrrttt") # Normally, update() cannot be done after digest() h = keccak.new(digest_bits=512, data=msg[:4]) dig1 = h.digest() self.assertRaises(TypeError, h.update, msg[4:]) dig2 = keccak.new(digest_bits=512, data=msg).digest() # With the proper flag, it is allowed h = keccak.new(digest_bits=512, data=msg[:4], update_after_digest=True) self.assertEqual(h.digest(), dig1) # ... and the subsequent digest applies to the entire message # up to that point h.update(msg[4:]) self.assertEqual(h.digest(), dig2) class KeccakVectors(unittest.TestCase): pass # TODO: add ExtremelyLong tests test_vectors_224 = load_test_vectors(("Hash", "keccak"), "ShortMsgKAT_224.txt", "Short Messages KAT 224", {"len": lambda x: int(x)}) or [] test_vectors_224 += load_test_vectors(("Hash", "keccak"), "LongMsgKAT_224.txt", "Long Messages KAT 224", {"len": lambda x: int(x)}) or [] for idx, tv in enumerate(test_vectors_224): if tv.len == 0: data = b("") else: data = tobytes(tv.msg) def new_test(self, data=data, result=tv.md): hobj = keccak.new(digest_bits=224, data=data) self.assertEqual(hobj.digest(), result) setattr(KeccakVectors, "test_224_%d" % idx, new_test) # --- test_vectors_256 = load_test_vectors(("Hash", "keccak"), "ShortMsgKAT_256.txt", "Short Messages KAT 256", { "len" : lambda x: int(x) } ) or [] test_vectors_256 += load_test_vectors(("Hash", "keccak"), "LongMsgKAT_256.txt", "Long Messages KAT 256", { "len" : lambda x: int(x) } ) or [] for idx, tv in enumerate(test_vectors_256): if tv.len == 0: data = b("") else: data = tobytes(tv.msg) def new_test(self, data=data, result=tv.md): hobj = keccak.new(digest_bits=256, data=data) self.assertEqual(hobj.digest(), result) setattr(KeccakVectors, "test_256_%d" % idx, new_test) # --- test_vectors_384 = load_test_vectors(("Hash", "keccak"), "ShortMsgKAT_384.txt", "Short Messages KAT 384", {"len": lambda x: int(x)}) or [] test_vectors_384 += load_test_vectors(("Hash", "keccak"), "LongMsgKAT_384.txt", "Long Messages KAT 384", {"len": lambda x: int(x)}) or [] for idx, tv in enumerate(test_vectors_384): if tv.len == 0: data = b("") else: data = tobytes(tv.msg) def new_test(self, data=data, result=tv.md): hobj = keccak.new(digest_bits=384, data=data) self.assertEqual(hobj.digest(), result) setattr(KeccakVectors, "test_384_%d" % idx, new_test) # --- test_vectors_512 = load_test_vectors(("Hash", "keccak"), "ShortMsgKAT_512.txt", "Short Messages KAT 512", {"len": lambda x: int(x)}) or [] test_vectors_512 += load_test_vectors(("Hash", "keccak"), "LongMsgKAT_512.txt", "Long Messages KAT 512", {"len": lambda x: int(x)}) or [] for idx, tv in enumerate(test_vectors_512): if tv.len == 0: data = b("") else: data = tobytes(tv.msg) def new_test(self, data=data, result=tv.md): hobj = keccak.new(digest_bits=512, data=data) self.assertEqual(hobj.digest(), result) setattr(KeccakVectors, "test_512_%d" % idx, new_test) def get_tests(config={}): tests = [] tests += list_test_cases(KeccakTest) tests += list_test_cases(KeccakVectors) return tests if __name__ == '__main__': import unittest suite = lambda: unittest.TestSuite(get_tests()) unittest.main(defaultTest='suite')
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