Java数字签名算法DSA实例详解

本文实例讲述了java数字签名算法dsa。分享给大家供大家参考，具体如下：

一、介绍

dss：digital signature standard 数字签名标准

dsa：digital signature algorithm 数字签名算法

dsa仅包含数字签名

二、参数说明

三、代码实现

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.初始化密钥

keypairgenerator keypairgenerator = keypairgenerator.getinstance("dsa");

keypairgenerator.initialize(512);

keypair keypair = keypairgenerator.generatekeypair();

dsapublickey dsapublickey = (dsapublickey) keypair.getpublic();

dsaprivatekey dsaprivatekey = (dsaprivatekey)keypair.getprivate();

//2.执行签名

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.验证签名

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、实现效果

jdk dsa sign : 302c0214310539f9e19ec98167a687eb4e8f91e7f47326bf021428080b7f0ad2ccffc71466998d8d364ba516e840
jdk dsa verify : true

五、应用场景

希望本文所述对大家java程序设计有所帮助。

原文链接：https://blog.csdn.net/chengqiuming/article/details/78762929

Java数字签名算法DSA实例详解

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