1*e7b1675dSTing-Kang Chang// Copyright 2022 Google LLC 2*e7b1675dSTing-Kang Chang// 3*e7b1675dSTing-Kang Chang// Licensed under the Apache License, Version 2.0 (the "License"); 4*e7b1675dSTing-Kang Chang// you may not use this file except in compliance with the License. 5*e7b1675dSTing-Kang Chang// You may obtain a copy of the License at 6*e7b1675dSTing-Kang Chang// 7*e7b1675dSTing-Kang Chang// http://www.apache.org/licenses/LICENSE-2.0 8*e7b1675dSTing-Kang Chang// 9*e7b1675dSTing-Kang Chang// Unless required by applicable law or agreed to in writing, software 10*e7b1675dSTing-Kang Chang// distributed under the License is distributed on an "AS IS" BASIS, 11*e7b1675dSTing-Kang Chang// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12*e7b1675dSTing-Kang Chang// See the License for the specific language governing permissions and 13*e7b1675dSTing-Kang Chang// limitations under the License. 14*e7b1675dSTing-Kang Chang// 15*e7b1675dSTing-Kang Chang//////////////////////////////////////////////////////////////////////////////// 16*e7b1675dSTing-Kang Chang 17*e7b1675dSTing-Kang Chang// Package mactest has testing utilities for the MAC primitive 18*e7b1675dSTing-Kang Changpackage mactest 19*e7b1675dSTing-Kang Chang 20*e7b1675dSTing-Kang Changimport ( 21*e7b1675dSTing-Kang Chang "github.com/google/tink/go/tink" 22*e7b1675dSTing-Kang Chang) 23*e7b1675dSTing-Kang Chang 24*e7b1675dSTing-Kang Chang// AlwaysFailingMAC fails compute and verify operations. 25*e7b1675dSTing-Kang Changtype AlwaysFailingMAC struct { 26*e7b1675dSTing-Kang Chang Error error 27*e7b1675dSTing-Kang Chang} 28*e7b1675dSTing-Kang Chang 29*e7b1675dSTing-Kang Changvar _ (tink.MAC) = (*AlwaysFailingMAC)(nil) 30*e7b1675dSTing-Kang Chang 31*e7b1675dSTing-Kang Chang// ComputeMAC returns an error on compute. 32*e7b1675dSTing-Kang Changfunc (m *AlwaysFailingMAC) ComputeMAC(data []byte) ([]byte, error) { 33*e7b1675dSTing-Kang Chang return nil, m.Error 34*e7b1675dSTing-Kang Chang} 35*e7b1675dSTing-Kang Chang 36*e7b1675dSTing-Kang Chang// VerifyMAC returns an error on verify. 37*e7b1675dSTing-Kang Changfunc (m *AlwaysFailingMAC) VerifyMAC(mac []byte, data []byte) error { 38*e7b1675dSTing-Kang Chang return m.Error 39*e7b1675dSTing-Kang Chang} 40