1 files changed, 65 insertions, 0 deletions
diff --git a/src/cryptography/hazmat/primitives/asymmetric/padding.py b/src/cryptography/hazmat/primitives/asymmetric/padding.py
new file mode 100644
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--- /dev/null
+++ b/src/cryptography/hazmat/primitives/asymmetric/padding.py
@@ -0,0 +1,65 @@
+# 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 six
+
+from cryptography import utils
+from cryptography.hazmat.primitives import interfaces
+
+
+@utils.register_interface(interfaces.AsymmetricPadding)
+class PKCS1v15(object):
+    name = "EMSA-PKCS1-v1_5"
+
+
+@utils.register_interface(interfaces.AsymmetricPadding)
+class PSS(object):
+    MAX_LENGTH = object()
+    name = "EMSA-PSS"
+
+    def __init__(self, mgf, salt_length):
+        self._mgf = mgf
+
+        if (not isinstance(salt_length, six.integer_types) and
+                salt_length is not self.MAX_LENGTH):
+            raise TypeError("salt_length must be an integer.")
+
+        if salt_length is not self.MAX_LENGTH and salt_length < 0:
+            raise ValueError("salt_length must be zero or greater.")
+
+        self._salt_length = salt_length
+
+
+@utils.register_interface(interfaces.AsymmetricPadding)
+class OAEP(object):
+    name = "EME-OAEP"
+
+    def __init__(self, mgf, algorithm, label):
+        if not isinstance(algorithm, interfaces.HashAlgorithm):
+            raise TypeError("Expected instance of interfaces.HashAlgorithm.")
+
+        self._mgf = mgf
+        self._algorithm = algorithm
+        self._label = label
+
+
+class MGF1(object):
+    MAX_LENGTH = object()
+
+    def __init__(self, algorithm):
+        if not isinstance(algorithm, interfaces.HashAlgorithm):
+            raise TypeError("Expected instance of interfaces.HashAlgorithm.")
+
+        self._algorithm = algorithm