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
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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();
}
}
}
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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