diff options
| -rw-r--r-- | cryptography/hazmat/backends/__init__.py | 33 | ||||
| -rw-r--r-- | tests/conftest.py | 4 |
2 files changed, 28 insertions, 9 deletions
diff --git a/cryptography/hazmat/backends/__init__.py b/cryptography/hazmat/backends/__init__.py index 59d1bc6c..ae78822c 100644 --- a/cryptography/hazmat/backends/__init__.py +++ b/cryptography/hazmat/backends/__init__.py @@ -13,23 +13,42 @@ from __future__ import absolute_import, division, print_function -from cryptography.hazmat.backends import openssl from cryptography.hazmat.backends.multibackend import MultiBackend from cryptography.hazmat.bindings.commoncrypto.binding import ( Binding as CommonCryptoBinding ) +from cryptography.hazmat.bindings.openssl.binding import ( + Binding as OpenSSLBinding +) + + +_available_backends_list = None + -_ALL_BACKENDS = [] +def _available_backends(): + global _available_backends_list -if CommonCryptoBinding.is_available(): - from cryptography.hazmat.backends import commoncrypto - _ALL_BACKENDS.append(commoncrypto.backend) + if _available_backends_list is None: + _available_backends_list = [] -_ALL_BACKENDS.append(openssl.backend) + if CommonCryptoBinding.is_available(): + from cryptography.hazmat.backends import commoncrypto + _available_backends_list.append(commoncrypto.backend) + if OpenSSLBinding.is_available(): + from cryptography.hazmat.backends import openssl + _available_backends_list.append(openssl.backend) -_default_backend = MultiBackend(_ALL_BACKENDS) + return _available_backends_list + + +_default_backend = None def default_backend(): + global _default_backend + + if _default_backend is None: + _default_backend = MultiBackend(_available_backends()) + return _default_backend diff --git a/tests/conftest.py b/tests/conftest.py index 0069f2c0..36183f46 100644 --- a/tests/conftest.py +++ b/tests/conftest.py @@ -15,7 +15,7 @@ from __future__ import absolute_import, division, print_function import pytest -from cryptography.hazmat.backends import _ALL_BACKENDS +from cryptography.hazmat.backends import _available_backends from cryptography.hazmat.backends.interfaces import ( HMACBackend, CipherBackend, HashBackend, PBKDF2HMACBackend, RSABackend ) @@ -25,7 +25,7 @@ from .utils import check_for_iface, check_backend_support, select_backends def pytest_generate_tests(metafunc): names = metafunc.config.getoption("--backend") - selected_backends = select_backends(names, _ALL_BACKENDS) + selected_backends = select_backends(names, _available_backends()) if "backend" in metafunc.fixturenames: metafunc.parametrize("backend", selected_backends) |