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