1 files changed, 56 insertions, 0 deletions
diff --git a/cryptography/hazmat/primitives/block/modes.py b/cryptography/hazmat/primitives/block/modes.py
new file mode 100644
index 00000000..a60e8a34
--- /dev/null
+++ b/cryptography/hazmat/primitives/block/modes.py
@@ -0,0 +1,56 @@
+# 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
+
+from cryptography.hazmat.primitives import interfaces
+
+
+@interfaces.register(interfaces.ModeWithInitializationVector)
+class CBC(object):
+    name = "CBC"
+
+    def __init__(self, initialization_vector):
+        super(CBC, self).__init__()
+        self.initialization_vector = initialization_vector
+
+
+class ECB(object):
+    name = "ECB"
+
+
+@interfaces.register(interfaces.ModeWithInitializationVector)
+class OFB(object):
+    name = "OFB"
+
+    def __init__(self, initialization_vector):
+        super(OFB, self).__init__()
+        self.initialization_vector = initialization_vector
+
+
+@interfaces.register(interfaces.ModeWithInitializationVector)
+class CFB(object):
+    name = "CFB"
+
+    def __init__(self, initialization_vector):
+        super(CFB, self).__init__()
+        self.initialization_vector = initialization_vector
+
+
+@interfaces.register(interfaces.ModeWithNonce)
+class CTR(object):
+    name = "CTR"
+
+    def __init__(self, nonce):
+        super(CTR, self).__init__()
+        self.nonce = nonce