def test_decrypt_succeeds(self): Ek, Ak = mkpasswd(test_pass) encrypted_data = encrypt(test_data, Ek, Ak).getvalue() Ek, Ak = mkpasswd(test_pass) decrypted_data = decrypt(encrypted_data, Ek, Ak).getvalue() self.assertEqual(decrypted_data, test_data)
def test_auth_fail_bad_mac(self):
"""cuts off the real MAC and puts in some bogus HMAC-SHA256 signature
that will cause decrypt() to raise an Exception."""
Ek, Ak = mkpasswd(test_data)
encrypted_data = encrypt(test_data, Ek, Ak).getvalue()
bad_mac = get_signature("bogus data", Ak)
encrypted_data = encrypted_data[:-MAC_SIZE] + bad_mac
with self.assertRaises(AuthenticationError):
decrypt(encrypted_data, Ek, Ak)