书单推荐:成为Java顶级程序员架构师 ,这20来本(高薪)必看点击获取
本文实例讲述了Java消息摘要算法MAC实现与应用。分享给大家供大家参考,具体如下:
一 介绍
MAC:Message Authentication Code
HMAC:keyed-Hash Message Authencication Code,含有密钥的散列函数算法。
融合MD、SHA
MD系列:HmacMD2、HmacMD4、HmacMD5
SHA系列:HmacSHA1、HmacSHA224、HmacSHA256、HmacSHA384、HmacSHA512
应用:SecureCRT
二 参数说明
三 代码实现
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();//产生密钥 // byte[] key = secretKey.getEncoded();//获得密钥 byte[] key = Hex.decodeHex(new char[] {'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a'}); SecretKey restoreSecretKey = new SecretKeySpec(key, "HmacMD5");//还原密钥 Mac mac = Mac.getInstance(restoreSecretKey.getAlgorithm());//实例化MAC mac.init(restoreSecretKey);//初始化Mac byte[] hmacMD5Bytes = mac.doFinal(src.getBytes());//执行摘要 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()];//执行摘要 hmac.doFinal(hmacMD5Bytes, 0); System.out.println("bc hmacMD5 : " + org.bouncycastle.util.encoders.Hex.toHexString(hmacMD5Bytes)); } }
四 实现效果
jdk hmacMD5 : d23aa029b2bacdd3979d10f0931f9af6
bc hmacMD5 : d23aa029b2bacdd3979d10f0931f9af6
五 应用场景
转载请注明:谷谷点程序 » Java消息摘要算法MAC实现与应用完整示例