Add basic KMS key endpoints.

moto/kms/responses.py

@@ -0,0 +1,48 @@
+from __future__ import unicode_literals
+
+import json
+
+from moto.core.responses import BaseResponse
+from .models import kms_backends
+
+
+class KmsResponse(BaseResponse):
+
+    @property
+    def parameters(self):
+        return json.loads(self.body.decode("utf-8"))
+
+    @property
+    def kms_backend(self):
+        return kms_backends[self.region]
+
+    def create_key(self):
+        policy = self.parameters.get('Policy')
+        key_usage = self.parameters.get('KeyUsage')
+        description = self.parameters.get('Description')
+
+        key = self.kms_backend.create_key(policy, key_usage, description, self.region)
+        return json.dumps(key.to_dict())
+
+    def describe_key(self):
+        key_id = self.parameters.get('KeyId')
+        try:
+            key = self.kms_backend.describe_key(key_id)
+        except KeyError:
+            self.headers['status'] = 404
+            return "{}", self.headers
+        return json.dumps(key.to_dict())
+
+    def list_keys(self):
+        keys = self.kms_backend.list_keys()
+
+        return json.dumps({
+            "Keys": [
+                {
+                    "KeyArn": key.arn,
+                    "KeyId": key.id,
+                } for key in keys
+            ],
+            "NextMarker": None,
+            "Truncated": False,
+        })