go/tink/mac.go

// Copyright 2018 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
////////////////////////////////////////////////////////////////////////////////

package tink

/*
MAC is the interface for MACs (Message Authentication Codes).
This interface should be used for authentication only, and not for other purposes
(for example, it should not be used to generate pseudorandom bytes).
*/
type MAC interface {

	// ComputeMAC computes message authentication code (MAC) for code data.
	ComputeMAC(data []byte) ([]byte, error)

	// Verify returns nil if mac is a correct authentication code (MAC) for data,
	// otherwise it returns an error.
	VerifyMAC(mac, data []byte) error
}