消息摘要加密算法SHA

最新推荐文章于 2021-08-26 16:07:16 发布

原创最新推荐文章于 2021-08-26 16:07:16 发布 · 324 阅读

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本文介绍了SHA系列加密算法的实现方式，包括使用Java内置的MessageDigest类进行SHA-1加密、利用BouncyCastle库实现SHA-1及SHA-224加密，并通过Apache Commons Codec库完成SHA-1加密。

package com.imooc.security.sha;

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

import org.apache.commons.codec.binary.Hex;
import org.apache.commons.codec.digest.DigestUtils;
import org.bouncycastle.crypto.Digest;
import org.bouncycastle.crypto.digests.SHA1Digest;
import org.bouncycastle.crypto.digests.SHA224Digest;

/**
 * 消息摘要加密算法
 * @author Bingo_Ge
 *
 */
public class ImoocSHA {
	
	private static String src = "imooc security sha";

	public static void main(String[] args) {
		jdkSHA1();
		bcSHA1();
		bcSHA224();
		ccSHA1();
	}
	
	private static void ccSHA1() {
		System.out.println("cc sha-1:" + DigestUtils.sha1Hex(src.getBytes()));
	}

	private static void bcSHA224() {
		Digest digest = new SHA224Digest();
		digest.update(src.getBytes(), 0, src.getBytes().length);
		byte[] sha1Bytes = new byte[digest.getDigestSize()];
		digest.doFinal(sha1Bytes, 0);
		
		System.out.println("bc sha-224:" + org.bouncycastle.util.encoders.Hex.toHexString(sha1Bytes));
	}

	private static void bcSHA1() {
		Digest digest = new SHA1Digest();
		digest.update(src.getBytes(), 0, src.getBytes().length);
		byte[] sha1Bytes = new byte[digest.getDigestSize()];
		digest.doFinal(sha1Bytes, 0);
		
		System.out.println("bc sha-1:" + org.bouncycastle.util.encoders.Hex.toHexString(sha1Bytes));
	}

	private static void jdkSHA1() {
		try {
			MessageDigest md = MessageDigest.getInstance("SHA");
			md.update(src.getBytes());
			System.out.println("jdk sha-1:" + Hex.encodeHexString(md.digest()));
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		}
	}

}