1 files changed, 18 insertions, 0 deletions
diff --git a/src/cryptography/hazmat/primitives/asymmetric/key_exchange.py b/src/cryptography/hazmat/primitives/asymmetric/key_exchange.py
new file mode 100644
index 00000000..a9846e28
--- /dev/null
+++ b/src/cryptography/hazmat/primitives/asymmetric/key_exchange.py
@@ -0,0 +1,18 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import, division, print_function
+
+import abc
+
+import six
+
+
+@six.add_metaclass(abc.ABCMeta)
+class KeyExchangeContext(object):
+    @abc.abstractmethod
+    def agree(self, public_key):
+        """
+        Returns the agreed key material.
+        """