1// Copyright 2022 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 mactest has testing utilities for the MAC primitive 18package mactest 19 20import ( 21 "github.com/google/tink/go/tink" 22) 23 24// AlwaysFailingMAC fails compute and verify operations. 25type AlwaysFailingMAC struct { 26 Error error 27} 28 29var _ (tink.MAC) = (*AlwaysFailingMAC)(nil) 30 31// ComputeMAC returns an error on compute. 32func (m *AlwaysFailingMAC) ComputeMAC(data []byte) ([]byte, error) { 33 return nil, m.Error 34} 35 36// VerifyMAC returns an error on verify. 37func (m *AlwaysFailingMAC) VerifyMAC(mac []byte, data []byte) error { 38 return m.Error 39} 40