Adding server.crypto package and initial API

This changes adds the kmip.services.server.crypto package and the
initial API for the CryptographicEngine hierarchy.

kmip/services/server/crypto/__init__.py

@@ -0,0 +1,14 @@
+# Copyright (c) 2016 The Johns Hopkins University/Applied Physics Laboratory
+# All Rights Reserved.
+#
+# 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.

kmip/services/server/crypto/api.py

@@ -0,0 +1,68 @@
+# Copyright (c) 2016 The Johns Hopkins University/Applied Physics Laboratory
+# All Rights Reserved.
+#
+# 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 abc import ABCMeta
+from abc import abstractmethod
+
+import six
+
+
+@six.add_metaclass(ABCMeta)
+class CryptographicEngine(object):
+    """
+    The abstract base class of the cryptographic engine hierarchy.
+
+    A cryptographic engine is responsible for generating all cryptographic
+    objects and conducting all cryptographic operations for a KMIP server
+    instance.
+    """
+
+    @abstractmethod
+    def create_symmetric_key(self, algorithm, length):
+        """
+        Create a symmetric key.
+
+        Args:
+            algorithm(CryptographicAlgorithm): An enumeration specifying the
+                algorithm for which the created key will be compliant.
+            length(int): The length of the key to be created. This value must
+                be compliant with the constraints of the provided algorithm.
+
+        Returns:
+            dict: A dictionary containing the key data, with the following
+                key/value fields:
+                * value - the bytes of the key
+                * format - a KeyFormatType enumeration for the bytes format
+        """
+
+    @abstractmethod
+    def create_asymmetric_key_pair(self, algorithm, length):
+        """
+        Create an asymmetric key pair.
+
+        Args:
+            algorithm(CryptographicAlgorithm): An enumeration specifying the
+                algorithm for which the created keys will be compliant.
+            length(int): The length of the keys to be created. This value must
+                be compliant with the constraints of the provided algorithm.
+
+        Returns:
+            dict: A dictionary containing the public key data, with the
+                following key/value fields:
+                * value - the bytes of the key
+                * format - a KeyFormatType enumeration for the bytes format
+            dict: A dictionary containing the private key data, identical in
+                structure to the public key dictionary.
+        """