Compile flag for AuthenticatorConfig (#628)

* Adds a compile flag for AuthenticatorConfig

The command can be disabled for authenticators that don't want users to
change their configuration.

* adds tool for calling Config

* std now implies config_command

* removes obsolete comment

tools/authenticator_config.py

@@ -0,0 +1,55 @@
+#!/usr/bin/env python3
+# Copyright 2023 Google LLC
+#
+# 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.
+# Lint as: python3
+"""Tool that sends a config command to OpenSK."""
+
+from __future__ import absolute_import, division, print_function
+
+import argparse
+import colorama
+from fido2 import hid
+from fido2.ctap2 import Config
+import uuid
+
+from tools.configure import fatal, get_opensk_devices, info
+
+
+def main(args):
+  colorama.init()
+
+  devices = get_opensk_devices(False)
+  if not devices:
+    fatal("No devices found.")
+
+  for authenticator in devices:
+    if authenticator.device.capabilities & hid.CAPABILITY.WINK:
+      authenticator.device.wink()
+    aaguid = uuid.UUID(bytes=authenticator.get_info().aaguid)
+    info(f"Config of device AAGUID {aaguid} ({authenticator.device}).")
+
+    config = Config(authenticator)
+    if args.ep:
+      info("Enable EP...")
+      config.enable_enterprise_attestation()
+    if args.always_uv:
+      info("Toggle AlwaysUv...")
+      config.toggle_always_uv()
+
+
+if __name__ == "__main__":
+  parser = argparse.ArgumentParser()
+  parser.add_argument("--ep", action=argparse.BooleanOptionalAction)
+  parser.add_argument("--always-uv", action=argparse.BooleanOptionalAction)
+  main(parser.parse_args())