def skipjackEncrypt(key, val):
block_size = 32
res = b""
cipher = skippy.Skippy(key)
val_b = int.to_bytes(val, val.bit_length() // 8 + 1, 'big')
i = math.ceil(len(val_b) / block_size)
def test_encrypt_and_decrypt_are_symmetrical(self):
key = "".join(
random.choices("0123456789abcdefghijklmnopqrstuvwxyz", k=10))
uut = skippy.Skippy(bytes(key, "ascii"))
for _ in range(1000):
plain = random.getrandbits(32)
cipher = uut.encrypt(plain)
self.assertEqual(plain, uut.decrypt(cipher),
f"Failed for key {key} and value {plain}!")
def test_decrypt_yields_same_result_as_skip32(self):
uut = skippy.Skippy(b"s3cr3t k3y")
for p, c in self.test_data.items():
self.assertEqual(uut.decrypt(c), p)
def test_long_keys_are_truncated(self):
short_skippy = skippy.Skippy(b"0123456789")
long_skippy = skippy.Skippy(b"0123456789abcdef")
self.assertEqual(short_skippy.encrypt(42), long_skippy.encrypt(42))
self.assertEqual(short_skippy.decrypt(42), long_skippy.decrypt(42))
def test_too_short_keys_raise(self):
with self.assertRaises(ValueError):
skippy.Skippy(b"012345678")