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 17syntax = "proto3"; 18 19package google.crypto.tink; 20 21import "proto/common.proto"; 22import "proto/hmac.proto"; 23 24option java_package = "com.google.crypto.tink.proto"; 25option java_multiple_files = true; 26option go_package = "github.com/google/tink/go/proto/aes_ctr_hmac_streaming_go_proto"; 27 28message AesCtrHmacStreamingParams { 29 uint32 ciphertext_segment_size = 1; 30 uint32 derived_key_size = 2; // size of AES-CTR keys derived for each segment 31 HashType hkdf_hash_type = 3; // hash function for key derivation via HKDF 32 HmacParams hmac_params = 4; // params for authentication tags 33} 34 35message AesCtrHmacStreamingKeyFormat { 36 uint32 version = 3; 37 AesCtrHmacStreamingParams 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.AesCtrHmacStreamingKey 42message AesCtrHmacStreamingKey { 43 uint32 version = 1; 44 AesCtrHmacStreamingParams params = 2; 45 bytes key_value = 3; // the main key, aka. "ikm", input key material 46} 47