X-AES-GCM proto files

PiperOrigin-RevId: 668074997
Change-Id: I50679cdcb5ed0ead7068e85b353410a386c2849b

proto/BUILD.bazel

@@ -122,6 +122,12 @@ proto_library(
     visibility = ["//visibility:public"],
 )
 
+proto_library(
+    name = "x_aes_gcm_proto",
+    srcs = ["x_aes_gcm.proto"],
+    visibility = ["//visibility:public"],
+)
+
 proto_library(
     name = "aes_ctr_hmac_streaming_proto",
     srcs = ["aes_ctr_hmac_streaming.proto"],
@@ -431,6 +437,16 @@ java_lite_proto_library(
     deps = [":aes_gcm_siv_proto"],
 )
 
+java_proto_library(
+    name = "x_aes_gcm_java_proto",
+    deps = [":x_aes_gcm_proto"],
+)
+
+java_lite_proto_library(
+    name = "x_aes_gcm_java_proto_lite",
+    deps = [":x_aes_gcm_proto"],
+)
+
 java_proto_library(
     name = "aes_ctr_hmac_streaming_java_proto",
     deps = [":aes_ctr_hmac_streaming_proto"],

proto/x_aes_gcm.proto

@@ -0,0 +1,40 @@
+// Copyright 2024 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.
+//
+////////////////////////////////////////////////////////////////////////////////
+
+syntax = "proto3";
+
+package google.crypto.tink;
+
+option java_package = "com.google.crypto.tink.proto";
+option java_multiple_files = true;
+
+message XAesGcmParams {
+  // Must be at least 8 bytes and at most 12 bytes.
+  uint32 salt_size = 1;
+}
+
+message XAesGcmKeyFormat {
+  uint32 version = 1;
+  reserved 2;
+  XAesGcmParams params = 3;
+}
+
+// key_type: type.googleapis.com/google.crypto.tink.XAesGcmKey
+message XAesGcmKey {
+  uint32 version = 1;
+  XAesGcmParams params = 2;
+  bytes key_value = 3;
+}