Function ExampleParse_hmac

hmac_example_test.go:42–65

Example parsing and validating a token using the HMAC signing method

()

// Example parsing and validating a token using the HMAC signing method
func ExampleParse_hmac() {
	// sample token string taken from the New example
	tokenString := "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJmb28iOiJiYXIiLCJuYmYiOjE0NDQ0Nzg0MDB9.u1riaD1rW97opCoAuRCTy4w58Br-Zk-bh7vLiRIsrpU"

	// Parse takes the token string and a function for looking up the key. The latter is especially
	// useful if you use multiple keys for your application.  The standard is to use 'kid' in the
	// head of the token to identify which key to use, but the parsed token (head and claims) is provided
	// to the callback, providing flexibility.
	token, err := jwt.Parse(tokenString, func(token *jwt.Token) (any, error) {
		// hmacSampleSecret is a []byte containing your secret, e.g. []byte("my_secret_key")
		return hmacSampleSecret, nil
	}, jwt.WithValidMethods([]string{jwt.SigningMethodHS256.Alg()}))
	if err != nil {
		log.Fatal(err)
	}

	if claims, ok := token.Claims.(jwt.MapClaims); ok {
		fmt.Println(claims["foo"], claims["nbf"])
	} else {
		fmt.Println(err)
	}

	// Output: bar 1.4444784e+09
}