本文實(shí)例講述了java數(shù)字簽名算法dsa。分享給大家供大家參考，具體如下：
一、介紹
dss：digital signature standard 數(shù)字簽名標(biāo)準(zhǔn)
dsa：digital signature algorithm 數(shù)字簽名算法
dsa僅包含數(shù)字簽名
二、參數(shù)說(shuō)明
三、代碼實(shí)現(xiàn)
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package com.imooc.security.dsa;import java.security.keyfactory;import java.security.keypair;import java.security.keypairgenerator;import java.security.privatekey;import java.security.publickey;import java.security.signature;import java.security.interfaces.dsaprivatekey;import java.security.interfaces.dsapublickey;import java.security.spec.pkcs8encodedkeyspec;import java.security.spec.x509encodedkeyspec;import org.apache.commons.codec.binary.hex;public class imoocdsa { private static string src = "cakin24 security dsa"; public static void main(string[] args) { jdkdsa(); } public static void jdkdsa() { try { //1.初始化密鑰 keypairgenerator keypairgenerator = keypairgenerator.getinstance("dsa"); keypairgenerator.initialize(512); keypair keypair = keypairgenerator.generatekeypair(); dsapublickey dsapublickey = (dsapublickey) keypair.getpublic(); dsaprivatekey dsaprivatekey = (dsaprivatekey)keypair.getprivate(); //2.執(zhí)行簽名 pkcs8encodedkeyspec pkcs8encodedkeyspec = new pkcs8encodedkeyspec(dsaprivatekey.getencoded()); keyfactory keyfactory = keyfactory.getinstance("dsa"); privatekey privatekey = keyfactory.generateprivate(pkcs8encodedkeyspec); signature signature = signature.getinstance("sha1withdsa"); signature.initsign(privatekey); signature.update(src.getbytes()); byte[] result = signature.sign(); system.out.println("jdk dsa sign : " + hex.encodehexstring(result)); //3.驗(yàn)證簽名 x509encodedkeyspec x509encodedkeyspec = new x509encodedkeyspec(dsapublickey.getencoded()); keyfactory = keyfactory.getinstance("dsa"); publickey publickey = keyfactory.generatepublic(x509encodedkeyspec); signature = signature.getinstance("sha1withdsa"); signature.initverify(publickey); signature.update(src.getbytes()); boolean bool = signature.verify(result); system.out.println("jdk dsa verify : " + bool); } catch (exception e) { e.printstacktrace(); } }} |
四、實(shí)現(xiàn)效果
jdk dsa sign : 302c0214310539f9e19ec98167a687eb4e8f91e7f47326bf021428080b7f0ad2ccffc71466998d8d364ba516e840
jdk dsa verify : true
五、應(yīng)用場(chǎng)景
希望本文所述對(duì)大家java程序設(shè)計(jì)有所幫助。
原文鏈接：https://blog.csdn.net/chengqiuming/article/details/78762929
