MD算法Java实现

最新推荐文章于 2021-03-02 12:16:57 发布

chengqiuming

最新推荐文章于 2021-03-02 12:16:57 发布

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分类专栏： java 安全文章标签： MD Java

本文链接：https://blog.youkuaiyun.com/chengqiuming/article/details/78755082

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一 代码实现

package com.imooc.security.md;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.Security;

import org.apache.commons.codec.binary.Hex;
import org.apache.commons.codec.digest.DigestUtils;
import org.bouncycastle.crypto.Digest;
import org.bouncycastle.crypto.digests.MD5Digest;
import org.bouncycastle.jce.provider.BouncyCastleProvider;

public class ImoocMD {
	
	private static String src = "cakin24 security md";

	public static void main(String[] args) {
		 jdkMD5();
		 jdkMD2();
		 bcMD4();
		 bcMD5();
		 ccMD5();
		 ccMD2();
	}
	
	public static void jdkMD5() {
		try {
			MessageDigest md = MessageDigest.getInstance("MD5");
			byte[] md5Bytes = md.digest(src.getBytes());
			System.out.println("JDK MD5 : " + Hex.encodeHexString(md5Bytes));
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		}
	}
	
	public static void jdkMD2() {
		try {
			MessageDigest md = MessageDigest.getInstance("MD2");
			byte[] md2Bytes = md.digest(src.getBytes());
			System.out.println("JDK MD2 : " + Hex.encodeHexString(md2Bytes));
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		}
	}
	
	public static void bcMD5() {
		Digest digest = new MD5Digest();
		digest.update(src.getBytes(), 0, src.getBytes().length);
		byte[] md5Bytes = new byte[digest.getDigestSize()];
		digest.doFinal(md5Bytes, 0);
		System.out.println("BC MD5 : " + org.bouncycastle.util.encoders.Hex.toHexString(md5Bytes));
	}
	
	public static void bcMD4() {
		try {
			Security.addProvider(new BouncyCastleProvider());
			MessageDigest md = MessageDigest.getInstance("MD4");
			byte[] md5Bytes = md.digest(src.getBytes());
			System.out.println("BC MD4 : " + Hex.encodeHexString(md5Bytes));
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		}
	}
	
	public static void ccMD5() {
		System.out.println("CC MD5 : " + DigestUtils.md5Hex(src.getBytes()));
	}
	
	public static void ccMD2() {
		System.out.println("CC MD2 : " + DigestUtils.md2Hex(src.getBytes()));
	}

}

二 实现效果

JDK MD5 : ebb47639b5290b464d45a2f8f825cf3b

JDK MD2 : 639b1d1032ff0d15698933e33c16666e

BC MD4 : b2d1a3d0dee14ba7bfee63bfba654683

BC MD5 : ebb47639b5290b464d45a2f8f825cf3b

CC MD5 : ebb47639b5290b464d45a2f8f825cf3b

CC MD2 : 639b1d1032ff0d15698933e33c16666e

三 MD算法应用