本文實例講述了java實現(xiàn)sha算法的方法。分享給大家供大家參考，具體如下：
一 簡介
安全散列算法
固定長度摘要信息
二 sha算法
sha-1、sha-2（sha-224、sha-256、sha384、sha-512）
三 sha算法實現(xiàn)
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package com.imooc.security.sha;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.sha1digest;import org.bouncycastle.crypto.digests.sha224digest;import org.bouncycastle.jce.provider.bouncycastleprovider;public class imoocsha { private static string src = "cakin24 security sha"; public static void main(string[] args) { jdksha1(); bcsha1(); bcsha224(); ccsha1(); } public 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(); } } public 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)); } public static void bcsha224() { digest digest = new sha224digest(); digest.update(src.getbytes(), 0, src.getbytes().length); byte[] sha224bytes = new byte[digest.getdigestsize()]; digest.dofinal(sha224bytes, 0); system.out.println("bc sha-224 : " + org.bouncycastle.util.encoders.hex.tohexstring(sha224bytes)); } public static void ccsha1() { system.out.println("cc sha1 - 1 :" + digestutils.sha1hex(src.getbytes())); system.out.println("cc sha1 - 2 :" + digestutils.sha1hex(src)); } //384、256、512。。。。。。} |
四 運行結(jié)果
jdk sha-1 : ba28a0f5f08efc8afaee4706ffd496e1f88befdb
bc sha-1 : ba28a0f5f08efc8afaee4706ffd496e1f88befdb
bc sha-224 : ae3b58439cd53d28455781fe6dc20c83a45d63e1d9550330c7911f58
cc sha1 - 1 :ba28a0f5f08efc8afaee4706ffd496e1f88befdb
cc sha1 - 2 :ba28a0f5f08efc8afaee4706ffd496e1f88befdb
五 sha算法應(yīng)用
希望本文所述對大家java程序設(shè)計有所幫助。
原文鏈接：https://blog.csdn.net/chengqiuming/article/details/78760791
