1// Copyright 2017 Google Inc. 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// 7// http://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS, 11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12// See the License for the specific language governing permissions and 13// limitations under the License. 14// 15//////////////////////////////////////////////////////////////////////////////// 16 17// Definitions for streaming encryption using AES-GCM 18// with HKDF as key derivation function. 19syntax = "proto3"; 20 21package google.crypto.tink; 22 23import "proto/common.proto"; 24 25option java_package = "com.google.crypto.tink.proto"; 26option java_multiple_files = true; 27option go_package = "github.com/google/tink/go/proto/aes_gcm_hkdf_streaming_go_proto"; 28 29message AesGcmHkdfStreamingParams { 30 uint32 ciphertext_segment_size = 1; 31 uint32 derived_key_size = 2; // size of AES-GCM keys derived for each segment 32 HashType hkdf_hash_type = 3; 33} 34 35message AesGcmHkdfStreamingKeyFormat { 36 uint32 version = 3; 37 AesGcmHkdfStreamingParams params = 1; 38 uint32 key_size = 2; // size of the main key (aka. "ikm", input key material) 39} 40 41// key_type: type.googleapis.com/google.crypto.tink.AesGcmHkdfStreamingKey 42message AesGcmHkdfStreamingKey { 43 uint32 version = 1; 44 AesGcmHkdfStreamingParams params = 2; 45 bytes key_value = 3; 46} 47