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 17// Package mac provides implementations of the MAC primitive. 18// 19// MAC computes a tag for a given message that can be used to authenticate a 20// message. MAC protects data integrity as well as provides for authenticity 21// of the message. 22package mac 23 24import ( 25 "fmt" 26 27 "github.com/google/tink/go/core/registry" 28 "github.com/google/tink/go/internal/internalregistry" 29) 30 31func init() { 32 if err := registry.RegisterKeyManager(new(hmacKeyManager)); err != nil { 33 panic(fmt.Sprintf("mac.init() failed: %v", err)) 34 } 35 if err := internalregistry.AllowKeyDerivation(hmacTypeURL); err != nil { 36 panic(fmt.Sprintf("mac.init() failed: %v", err)) 37 } 38 if err := registry.RegisterKeyManager(new(aescmacKeyManager)); err != nil { 39 panic(fmt.Sprintf("mac.init() failed: %v", err)) 40 } 41} 42