// 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 mac provides implementations of the MAC primitive.
// MAC computes a tag for a given message that can be used to authenticate a message.
// MAC protects data integrity as well as provides for authenticity of the message.
// Example:
//
// package main
//
// import (
//     "fmt"
//
//     "github.com/google/tink/go/mac"
//     "github.com/google/tink/go/keyset"
// )
//
// func main() {
//
//     kh, err := keyset.NewHandle(mac.HMACSHA256Tag256KeyTemplate())
//     if err != nil {
//         // handle the error
//     }
//
//     m := mac.New(kh)
//
//     mac , err := m.ComputeMac([]byte("this data needs to be MACed"))
//     if err != nil {
//         // handle error
//     }
//
//     if m.VerifyMAC(mac, []byte("this data needs to be MACed")); err != nil {
//         //handle error
//     }
//
// }
package mac

import (
	"fmt"

	"github.com/google/tink/go/core/registry"
)

func init() {
	if err := registry.RegisterKeyManager(newHMACKeyManager()); err != nil {
		panic(fmt.Sprintf("mac.init() failed: %v", err))
	}
}