diff options
| -rw-r--r-- | cryptography/hazmat/backends/openssl/backend.py | 7 | ||||
| -rw-r--r-- | tests/hazmat/primitives/test_cmac.py | 2 |
2 files changed, 6 insertions, 3 deletions
diff --git a/cryptography/hazmat/backends/openssl/backend.py b/cryptography/hazmat/backends/openssl/backend.py index 7cfdd284..11731133 100644 --- a/cryptography/hazmat/backends/openssl/backend.py +++ b/cryptography/hazmat/backends/openssl/backend.py @@ -556,8 +556,11 @@ class Backend(object): return self._ffi.buffer(buf)[:res] def cmac_algorithm_supported(self, algorithm): - return (backend._lib.Cryptography_HAS_CMAC == 1 - and backend.cipher_supported(algorithm, CBC(0))) + return ( + backend._lib.Cryptography_HAS_CMAC == 1 + and backend.cipher_supported(algorithm, CBC( + b"\x00" * algorithm.block_size)) + ) def create_cmac_ctx(self, algorithm): return _CMACContext(self, algorithm) diff --git a/tests/hazmat/primitives/test_cmac.py b/tests/hazmat/primitives/test_cmac.py index a1c24ada..dd7f9df4 100644 --- a/tests/hazmat/primitives/test_cmac.py +++ b/tests/hazmat/primitives/test_cmac.py @@ -49,7 +49,7 @@ vectors_aes = vectors_aes128 + vectors_aes192 + vectors_aes256 vectors_3des = load_vectors_from_file( "CMAC/nist-800-38b-3des.txt", load_nist_vectors) -fake_key = "AAAAAAAAAAAAAAAA" +fake_key = b"\x00" * 16 @pytest.mark.cmac |