xref: /aosp_15_r20/external/tink/go/mac/internal/mactest/mactest.go (revision e7b1675dde1b92d52ec075b0a92829627f2c52a5)
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