package com.ynxbd.common.helper.common;

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

/**
 * HMAC算法
 */
public class HMACHelper {

    public static String sha256(String data, String key) {
        try {
            Mac sha256_HMAC = Mac.getInstance("HmacSHA256");

            SecretKeySpec secret_key = new SecretKeySpec(key.getBytes(StandardCharsets.UTF_8), "HmacSHA256");

            sha256_HMAC.init(secret_key);

            byte[] array = sha256_HMAC.doFinal(data.getBytes(StandardCharsets.UTF_8));

            StringBuilder sb = new StringBuilder();

            for (byte item : array) {
                sb.append(Integer.toHexString((item & 0xFF) | 0x100).substring(1, 3));
            }
            return sb.toString();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    public static void main(String[] args) {
        System.out.println(sha256("123", "1"));
    }
}