Adding server support for the GetAttributeList operation

This change adds support for the GetAttributeList operation. The
user can specify the ID of a managed object and get back a list
containing the names of all attributes currently set on the object.
The user can also omit the ID and the server will default to using
the ID placeholder for the object ID. New server tests have been
added to cover this feature. The GetAttributeList payloads have
also been updated for consistency with other payloads, requiring
minor updates in other clients and unit tests.

kmip/services/server/engine.py

@@ -43,6 +43,7 @@ from kmip.core.messages.payloads import destroy
 from kmip.core.messages.payloads import discover_versions
 from kmip.core.messages.payloads import get
 from kmip.core.messages.payloads import get_attributes
+from kmip.core.messages.payloads import get_attribute_list
 from kmip.core.messages.payloads import query
 from kmip.core.messages.payloads import register
 
@@ -911,6 +912,8 @@ class KmipEngine(object):
             return self._process_get(payload)
         elif operation == enums.Operation.GET_ATTRIBUTES:
             return self._process_get_attributes(payload)
+        elif operation == enums.Operation.GET_ATTRIBUTE_LIST:
+            return self._process_get_attribute_list(payload)
         elif operation == enums.Operation.ACTIVATE:
             return self._process_activate(payload)
         elif operation == enums.Operation.DESTROY:
@@ -1380,6 +1383,51 @@ class KmipEngine(object):
 
         return response_payload
 
+    @_kmip_version_supported('1.0')
+    def _process_get_attribute_list(self, payload):
+        self._logger.info("Processing operation: GetAttributeList")
+
+        if payload.unique_identifier:
+            unique_identifier = payload.unique_identifier
+        else:
+            unique_identifier = self._id_placeholder
+
+        object_type = self._get_object_type(unique_identifier)
+
+        managed_object = self._data_session.query(object_type).filter(
+            object_type.unique_identifier == unique_identifier
+        ).one()
+
+        # Determine if the request should be carried out under the object's
+        # operation policy. If not, feign ignorance of the object.
+        is_allowed = self._is_allowed_by_operation_policy(
+            managed_object.operation_policy_name,
+            self._client_identity,
+            managed_object._owner,
+            managed_object._object_type,
+            enums.Operation.GET_ATTRIBUTES
+        )
+        if not is_allowed:
+            raise exceptions.ItemNotFound(
+                "Could not locate object: {0}".format(unique_identifier)
+            )
+
+        object_attributes = self._get_attributes_from_managed_object(
+            managed_object,
+            list()
+        )
+        attribute_names = list()
+
+        for object_attribute in object_attributes:
+            attribute_names.append(object_attribute.attribute_name.value)
+
+        response_payload = get_attribute_list.GetAttributeListResponsePayload(
+            unique_identifier=unique_identifier,
+            attribute_names=attribute_names
+        )
+
+        return response_payload
+
     @_kmip_version_supported('1.0')
     def _process_activate(self, payload):
         self._logger.info("Processing operation: Activate")
@@ -1502,6 +1550,7 @@ class KmipEngine(object):
                 contents.Operation(enums.Operation.REGISTER),
                 contents.Operation(enums.Operation.GET),
                 contents.Operation(enums.Operation.GET_ATTRIBUTES),
+                contents.Operation(enums.Operation.GET_ATTRIBUTE_LIST),
                 contents.Operation(enums.Operation.ACTIVATE),
                 contents.Operation(enums.Operation.DESTROY),
                 contents.Operation(enums.Operation.QUERY)