1 files changed, 46 insertions, 0 deletions
diff --git a/src/cryptography/hazmat/backends/__init__.py b/src/cryptography/hazmat/backends/__init__.py
new file mode 100644
index 00000000..b0f663fe
--- /dev/null
+++ b/src/cryptography/hazmat/backends/__init__.py
@@ -0,0 +1,46 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import absolute_import, division, print_function
+
+import pkg_resources
+
+from cryptography.hazmat.backends.multibackend import MultiBackend
+
+
+_available_backends_list = None
+
+
+def _available_backends():
+    global _available_backends_list
+
+    if _available_backends_list is None:
+        _available_backends_list = [
+            backend.load(require=False)
+            for backend in pkg_resources.iter_entry_points(
+                "cryptography.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