def test_break_if_iv_is_same_as_key(self):
"""Challenge 27"""
key = Crypto.gen_random_key(16)
iv = key
oracle = lambda c: Crypto.decrypt_aes(c, key, AES.MODE_CBC, iv)
cipher = Crypto.encrypt_aes("X" * 48, key, AES.MODE_CBC, iv)
self.assertEquals(
key, Crypto.extract_key_if_key_is_same_as_key(cipher, oracle))
def test_break_if_iv_is_same_as_key(self):
"""Challenge 27"""
key = Crypto.gen_random_key(16)
iv = key
oracle = lambda c: Crypto.decrypt_aes(c, key, AES.MODE_CBC, iv)
cipher = Crypto.encrypt_aes("X"*48, key, AES.MODE_CBC, iv)
self.assertEquals(key,
Crypto.extract_key_if_key_is_same_as_key(cipher, oracle))
