def test_invalid_mac(self):
from crypto.Util.strxor import strxor_c
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
ct, mac = cipher.encrypt_and_digest(self.data_128)
invalid_mac = strxor_c(mac, 0x01)
cipher = AES.new(self.key_128, AES.MODE_OCB, nonce=self.nonce_96)
self.assertRaises(ValueError, cipher.decrypt_and_verify, ct,
invalid_mac)
def runTest(self):
key = binascii.a2b_hex(b(self.key))
data = binascii.a2b_hex(b(self.input))
# Strip whitespace from the expected string (which should be in lowercase-hex)
expected = b("".join(self.result.split()))
h = self.module.new(key, **self.params)
h.update(data)
out1_bin = h.digest()
out1 = binascii.b2a_hex(h.digest())
out2 = h.hexdigest()
# Verify that correct MAC does not raise any exception
h.hexverify(out1)
h.verify(out1_bin)
# Verify that incorrect MAC does raise ValueError exception
wrong_mac = strxor_c(out1_bin, 255)
self.assertRaises(ValueError, h.verify, wrong_mac)
self.assertRaises(ValueError, h.hexverify, "4556")
h = self.module.new(key, data, **self.params)
out3 = h.hexdigest()
out4 = binascii.b2a_hex(h.digest())
# Test .copy()
h2 = h.copy()
h.update(b("blah blah blah")) # Corrupt the original hash object
out5 = binascii.b2a_hex(h2.digest()) # The copied hash object should return the correct result
# PY3K: Check that hexdigest() returns str and digest() returns bytes
if sys.version_info[0] > 2:
self.assertTrue(isinstance(h.digest(), type(b(""))))
self.assertTrue(isinstance(h.hexdigest(), type("")))
# PY3K: Check that .hexverify() accepts bytes or str
if sys.version_info[0] > 2:
h.hexverify(h.hexdigest())
h.hexverify(h.hexdigest().encode('ascii'))
# PY3K: hexdigest() should return str, and digest() should return bytes
self.assertEqual(expected, out1)
if sys.version_info[0] == 2:
self.assertEqual(expected, out2)
self.assertEqual(expected, out3)
else:
self.assertEqual(expected.decode(), out2)
self.assertEqual(expected.decode(), out3)
self.assertEqual(expected, out4)
self.assertEqual(expected, out5)
def test_degradation(self):
sub_key1 = bchr(1) * 8
sub_key2 = bchr(255) * 8
# K1 == K2
self.assertRaises(ValueError, DES3.adjust_key_parity,
sub_key1 * 2 + sub_key2)
# K2 == K3
self.assertRaises(ValueError, DES3.adjust_key_parity,
sub_key1 + sub_key2 * 2)
# K1 == K2 == K3
self.assertRaises(ValueError, DES3.adjust_key_parity,
sub_key1 * 3)
# K1 == K2 (with different parity)
self.assertRaises(ValueError, DES3.adjust_key_parity,
sub_key1 + strxor_c(sub_key1, 1) + sub_key2)
def runTest(self):
sub_key1 = bchr(1) * 8
sub_key2 = bchr(255) * 8
# K1 == K2
self.assertRaises(ValueError, DES3.new,
sub_key1 * 2 + sub_key2,
DES3.MODE_ECB)
# K2 == K3
self.assertRaises(ValueError, DES3.new,
sub_key1 + sub_key2 * 2,
DES3.MODE_ECB)
# K1 == K2 == K3
self.assertRaises(ValueError, DES3.new,
sub_key1 *3,
DES3.MODE_ECB)
# K2 == K3 (parity is ignored)
self.assertRaises(ValueError, DES3.new,
sub_key1 + sub_key2 + strxor_c(sub_key2, 0x1),
DES3.MODE_ECB)
def test3(self):
self.assertEqual(strxor_c(b"", 90), b"")
def test2(self):
term1 = unhexlify(b"ff339a83e5cd4cdf5649")
self.assertEqual(strxor_c(term1, 0), term1)
def test1(self):
term1 = unhexlify(b"ff339a83e5cd4cdf5649")
result = unhexlify(b"be72dbc2a48c0d9e1708")
self.assertEqual(strxor_c(term1, 65), result)
def test_memoryview(self):
term1 = unhexlify(b"ff339a83e5cd4cdf5649")
term1_mv = memoryview(term1)
result = unhexlify(b"be72dbc2a48c0d9e1708")
self.assertEqual(strxor_c(term1_mv, 65), result)
def test_bytearray(self):
term1 = unhexlify(b"ff339a83e5cd4cdf5649")
term1_ba = bytearray(term1)
result = unhexlify(b"be72dbc2a48c0d9e1708")
self.assertEqual(strxor_c(term1_ba, 65), result)
src = b"1b37373331363f78151b7f2b783431333d78397828372d363c78373e783a393b3736"
src = binascii.unhexlify(src)
keys = []
for key in range(0, 255):
keys.append(key)
answers = {}
mydict = {}
def printScores(answer):
score = 0
for i in answer:
char = chr(i)
if char.lower() in freqs:
score = score + freqs[char.lower()]
mydict[answer] = score
return mydict
#
for key in keys:
answer = strxor_c(src, key)
answers =printScores(answer)
inverse = [(value, key) for key, value in mydict.items()]
print(max(inverse)[1])
def test_verify(self):
h = self.BLAKE2.new(digest_bytes=self.max_bytes, key=b"4")
mac = h.digest()
h.verify(mac)
wrong_mac = strxor_c(mac, 255)
self.assertRaises(ValueError, h.verify, wrong_mac)
