Raise maximum allowed secret size

The default maximum allowed size is too small for some certificates.
This patch doubles the allowed size from 10Kb to 20Kb, and raises the
maximum request size by the same amount.

Change-Id: I59d11c5c9c32128ab9d71eaecdf46dd2d789a8d1
(cherry picked from commit c59f2a6bbb)
(cherry picked from commit bac7d2205a)

barbican/common/config.py

@@ -28,8 +28,8 @@ from oslo_service import _options
 from barbican import i18n as u
 import barbican.version
 
-MAX_BYTES_REQUEST_INPUT_ACCEPTED = 15000
-DEFAULT_MAX_SECRET_BYTES = 10000
+MAX_BYTES_REQUEST_INPUT_ACCEPTED = 25000
+DEFAULT_MAX_SECRET_BYTES = 20000
 KS_NOTIFICATIONS_GRP_NAME = 'keystone_notifications'
 
 context_opts = [

barbican/tests/api/controllers/test_secrets.py

@@ -628,7 +628,7 @@ class WhenGettingPuttingOrDeletingSecret(utils.BarbicanAPIBaseTestCase):
 
         self.assertEqual(201, resp.status_int)
 
-        text_too_big = 'x' * 10050
+        text_too_big = 'x' * 20050
         put_resp = self.app.put(
             '/secrets/{0}'.format(secret_uuid),
             text_too_big,

functionaltests/api/base.py

@@ -36,7 +36,7 @@ conf_multiple_backends_enabled = CONF.keymanager.\
 
 
 class TestCase(oslotest.BaseTestCase):
-    max_payload_size = 10000
+    max_payload_size = 20000
     max_sized_payload = b'a' * max_payload_size
     oversized_payload = b'a' * (max_payload_size + 1)
     max_field_size = 255

releasenotes/notes/increase-max-secret-size-da90164d8b328727.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    The default maximum secret size has been increased from 10 kB to 20 kb, and
+    the default maximum request size has been increased from 15 kB to 25 kB.