| // Copyright 2019 Google Inc. | 
 | // | 
 | // 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; | 
 | option go_package = "github.com/tink-crypto/tink-go/v2/proto/aes_gcm_siv_go_proto"; | 
 |  | 
 | // The only allowed IV size is 12 bytes and tag size is 16 bytes. | 
 | // Thus, accept no params. | 
 | message AesGcmSivKeyFormat { | 
 |   uint32 key_size = 2; | 
 |   uint32 version = 1; | 
 | } | 
 |  | 
 | // key_type: type.googleapis.com/google.crypto.tink.AesGcmSivKey | 
 | message AesGcmSivKey { | 
 |   uint32 version = 1; | 
 |   bytes key_value = 3; | 
 | } |