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# Copyright (c) 2015, Legrandin <helderijs@gmail.com>
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# 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
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# the documentation and/or other materials provided with the
# distribution.
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"""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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