Hmac-Sha512

HmacSha512.go

package main

import (
	"crypto/hmac"
	"crypto/sha512"
	"encoding/hex"
	"fmt"
)

func main() {

	var secret = []byte("The secret key")
	var data = []byte("data")

	messageMac, err := HmacSHA512(secret, data)
	if err != nil {
		fmt.Println(err)
	}

	// Convert byte to hex string
	fmt.Println("hmacSha512:", hex.EncodeToString(messageMac))

	valid := HmacSHA512Valid(messageMac, secret, data)
	fmt.Println("Valid:", valid)
}

func HmacSHA512(secret, data []byte) (mac []byte, err error) {

	// hmacMd5: md5.New
	hash := hmac.New(sha512.New, secret)
	_, err = hash.Write(data)
	if err != nil {
		return nil, err
	}

	mac = hash.Sum(nil)
	// Convert byte to hex string: hex.EncodeToString(mac)

	return
}

func HmacSHA512Valid(expectedMac, secret, data []byte) bool {
	messageMac, err := HmacSHA512(secret, data)
	if err != nil {
		return false
	}

	return hmac.Equal(messageMac, expectedMac)
}

HmacSha512.java

import org.apache.commons.codec.binary.Hex;

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.nio.charset.StandardCharsets;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;

public class HmacSha512 {

    public static void main(String[] args) {
        String mac = hmacSha512("data", "The secret key");
        System.out.println("hmacSha512: " + mac);
    }

    public static String hmacSha512(String text, String secret) {

        try {
            // HmacMD5
            Mac mac = Mac.getInstance("HmacSHA512");
            mac.init(new SecretKeySpec(secret.getBytes(StandardCharsets.UTF_8), "HmacSHA512"));

            byte[] rawHmac = mac.doFinal(text.getBytes());

            // Convert byte to hex string
            return Hex.encodeHexString(rawHmac);
        } catch (NoSuchAlgorithmException | InvalidKeyException e) {
            e.printStackTrace();
        }

        return null;
    }
}