[proto] add registry record proto message

This message will serve as the input to the various downstream SKU-owner
registry service(s).

Signed-off-by: Tim Trippel <[email protected]>

Author: timothytrippel

src/proto/BUILD.bazel

@@ -46,3 +46,8 @@ go_test(
     embed = [":validators"],
     deps = [":device_testdata"],
 )
+
+proto_library(
+    name = "registry_record_proto",
+    srcs = ["registry_record.proto"],
+)

src/proto/registry_record.proto

@@ -0,0 +1,21 @@
+// Copyright lowRISC contributors (OpenTitan project).
+// Licensed under the Apache License, Version 2.0, see LICENSE for details.
+// SPDX-License-Identifier: Apache-2.0
+
+syntax = "proto3";
+
+package ot_registry_record;
+
+option go_package = "registry_record_go_pb";
+
+// OpenTitan Registry Record sent to a registry service.
+//
+// This will get sent to one (or many) registry service(s).
+message RegistryRecord {
+  // Device ID encoded as a hex string.
+  string device_id = 1;
+  // Verion number indicating version of device data field below.
+  sfixed32 version = 2;
+  // Device data encoded as a variable length bytes payload.
+  bytes data = 3;
+}