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- // Copyright 2017 The Go Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style
- // license that can be found in the LICENSE file.
-
- package auth_test
-
- import (
- "encoding/hex"
- "fmt"
-
- "golang.org/x/crypto/nacl/auth"
- )
-
- func Example() {
- // Load your secret key from a safe place and reuse it across multiple
- // Sum calls. (Obviously don't use this example key for anything
- // real.) If you want to convert a passphrase to a key, use a suitable
- // package like bcrypt or scrypt.
- secretKeyBytes, err := hex.DecodeString("6368616e676520746869732070617373776f726420746f206120736563726574")
- if err != nil {
- panic(err)
- }
-
- var secretKey [32]byte
- copy(secretKey[:], secretKeyBytes)
-
- mac := auth.Sum([]byte("hello world"), &secretKey)
- fmt.Printf("%x\n", *mac)
- result := auth.Verify(mac[:], []byte("hello world"), &secretKey)
- fmt.Println(result)
- badResult := auth.Verify(mac[:], []byte("different message"), &secretKey)
- fmt.Println(badResult)
- // Output: eca5a521f3d77b63f567fb0cb6f5f2d200641bc8dada42f60c5f881260c30317
- // true
- // false
- }
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