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# Copyright (c) 2015, Legrandin <helderijs@gmail.com>
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# notice, this list of conditions and the following disclaimer.
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"""Self-test suite for Crypto.Hash.SHAKE128 and SHAKE256"""
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 SHAKE128, SHAKE256
from Crypto.Util.py3compat import b, bchr, bord, tobytes
class SHAKETest(unittest.TestCase):
def test_new_positive(self):
xof1 = self.shake.new()
xof2 = self.shake.new(data=b("90"))
xof3 = self.shake.new().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.shake.new()
h.update(pieces[0]).update(pieces[1])
digest = h.read(10)
h = self.shake.new()
h.update(pieces[0] + pieces[1])
self.assertEqual(h.read(10), digest)
def test_update_negative(self):
h = self.shake.new()
self.assertRaises(TypeError, h.update, u"string")
def test_digest(self):
h = self.shake.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.shake.new()
mac.update(b("rrrr"))
mac.read(90)
self.assertRaises(TypeError, mac.update, b("ttt"))
class SHAKE128Test(SHAKETest):
shake = SHAKE128
class SHAKE256Test(SHAKETest):
shake = SHAKE256
class SHAKEVectors(unittest.TestCase):
pass
test_vectors_128 = load_test_vectors(("Hash", "SHA3"),
"ShortMsgKAT_SHAKE128.txt",
"Short Messages KAT SHAKE128",
{ "len" : lambda x: int(x) } ) or []
for idx, tv in enumerate(test_vectors_128):
if tv.len == 0:
data = b("")
else:
data = tobytes(tv.msg)
def new_test(self, data=data, result=tv.md):
hobj = SHAKE128.new(data=data)
digest = hobj.read(len(result))
self.assertEqual(digest, result)
setattr(SHAKEVectors, "test_128_%d" % idx, new_test)
test_vectors_256 = load_test_vectors(("Hash", "SHA3"),
"ShortMsgKAT_SHAKE256.txt",
"Short Messages KAT SHAKE256",
{ "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 = SHAKE256.new(data=data)
digest = hobj.read(len(result))
self.assertEqual(digest, result)
setattr(SHAKEVectors, "test_256_%d" % idx, new_test)
def get_tests(config={}):
tests = []
tests += list_test_cases(SHAKE128Test)
tests += list_test_cases(SHAKE256Test)
tests += list_test_cases(SHAKEVectors)
return tests
if __name__ == '__main__':
import unittest
suite = lambda: unittest.TestSuite(get_tests())
unittest.main(defaultTest='suite')
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