1// Copyright 2019 Google LLC 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"; 22 23option java_package = "com.google.crypto.tink.proto"; 24option java_multiple_files = true; 25option go_package = "github.com/google/tink/go/proto/hkdf_prf_proto"; 26 27message HkdfPrfParams { 28 HashType hash = 1; 29 // Optional. 30 // 31 // An unspecified or zero-length value is equivalent to a sequence of zeros 32 // (0x00) with a length equal to the output size of hash. 33 // 34 // See https://rfc-editor.org/rfc/rfc5869. 35 bytes salt = 2; 36} 37 38message HkdfPrfKey { 39 uint32 version = 1; 40 HkdfPrfParams params = 2; 41 bytes key_value = 3; 42} 43 44message HkdfPrfKeyFormat { 45 HkdfPrfParams params = 1; 46 uint32 key_size = 2; 47 uint32 version = 3; 48} 49