Java消息摘要算法MAC實(shí)現(xiàn)與應(yīng)用完整示例

更新時(shí)間：2019年09月05日 09:35:19 作者：cakincqm

這篇文章主要介紹了Java消息摘要算法MAC實(shí)現(xiàn)與應(yīng)用,結(jié)合完整實(shí)例形式分析了java消息摘要算法MAC的概念、原理、實(shí)現(xiàn)方法及相關(guān)操作注意事項(xiàng),需要的朋友可以參考下

本文實(shí)例講述了Java消息摘要算法MAC實(shí)現(xiàn)與應(yīng)用。分享給大家供大家參考，具體如下：

一介紹

MAC：Message Authentication Code
HMAC：keyed-Hash Message Authencication Code,含有密鑰的散列函數(shù)算法。
融合MD、SHA
MD系列：HmacMD2、HmacMD4、HmacMD5
SHA系列：HmacSHA1、HmacSHA224、HmacSHA256、HmacSHA384、HmacSHA512
應(yīng)用：SecureCRT

二參數(shù)說明

三代碼實(shí)現(xiàn)

package com.imooc.security.hmac;
import javax.crypto.KeyGenerator;
import javax.crypto.Mac;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Hex;
import org.bouncycastle.crypto.digests.MD5Digest;
import org.bouncycastle.crypto.macs.HMac;
import org.bouncycastle.crypto.params.KeyParameter;
public class ImoocHmac {
    private static String src = "cakin24 security hmac";
    public static void main(String[] args) {
         jdkHmacMD5();
         bcHmacMD5();
    }
    public static void jdkHmacMD5() {
        try {
            KeyGenerator keyGenerator = KeyGenerator.getInstance("HmacMD5");//初始化KeyGenerator
            SecretKey secretKey = keyGenerator.generateKey();//產(chǎn)生密鑰
//            byte[] key = secretKey.getEncoded();//獲得密鑰
            byte[] key = Hex.decodeHex(new char[] {'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a'});
            SecretKey restoreSecretKey = new SecretKeySpec(key, "HmacMD5");//還原密鑰
            Mac mac = Mac.getInstance(restoreSecretKey.getAlgorithm());//實(shí)例化MAC
            mac.init(restoreSecretKey);//初始化Mac
            byte[] hmacMD5Bytes = mac.doFinal(src.getBytes());//執(zhí)行摘要
            System.out.println("jdk hmacMD5 : " + Hex.encodeHexString(hmacMD5Bytes));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    public static void bcHmacMD5() {
        HMac hmac = new HMac(new MD5Digest());
        hmac.init(new KeyParameter(org.bouncycastle.util.encoders.Hex.decode("aaaaaaaaaa")));
        hmac.update(src.getBytes(), 0, src.getBytes().length);
        byte[] hmacMD5Bytes = new byte[hmac.getMacSize()];//執(zhí)行摘要
        hmac.doFinal(hmacMD5Bytes, 0);
        System.out.println("bc hmacMD5 : " + org.bouncycastle.util.encoders.Hex.toHexString(hmacMD5Bytes));
    }
}

四實(shí)現(xiàn)效果