Java实现RSA算法的方法详解

网友投稿 406 2023-02-10


Java实现RSA算法的方法详解

本文实例讲述了java实现RSA算法的方法。分享给大家供大家参考,具体如下:

一 介绍

唯一广泛接受并实现

用于数据加密和数字签名

公钥加密、私钥解密

私钥加密、公钥解密

二 RSA参数说明

三 实现

package com.imooc.security.rsa;

import java.security.KeyFactory;

import java.security.KeyPair;

import java.security.KeyPairGenerator;

import java.security.PrivateKey;

import java.security.PublicKey;

import java.security.interfaces.RSAPrivateKey;

import java.security.interfaces.RSAPublicKey;

import java.security.spec.PKCS8EncodedKeySpec;

import java.security.spec.X509EncodedKeySpec;

import javax.crypto.Cipher;

import org.apache.commons.codec.binary.Base64;

public class ImoocRSA {

private static String src = "cakin24 security rsa";

public static void main(String[] args) {

jdkRSA();

}

public static void jdkRSA() {

try {

//1.初始化密钥

KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");

keyPairGenerator.initialize(512);

KeyPair keyPair = keyPairGenerator.generateKeyPair();

RSAPublicKey rsaPublicKey = (RSAPublicKey)keyPair.getPublic();

RSAPrivateKey rsaPrivateKey = (RSAPrivateKey)keyPair.getPrivate();

System.out.println("Public Key : " + Base64.encodeBase64String(rsaPublicKey.getEncoded()));

System.out.println("Private Key : " + Base64.encodeBase64String(rsaPrivateKey.getEncoded()));

//2.私钥加密、公钥解密——加密

PKCS8EncodedKeySpec pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(rsaPrivateKey.getEncoded());

KeyFactory keyFactory = KeyFactory.getInstance("RSA");

PrivateKey privateKey = keyFactory.generatePrivate(pkcs8EncodedKeySpec);

Cipher cipher = Cipher.getInstance("RSA");

cipher.init(Cipher.ENCRYPT_MODE, privateKey);

byte[] result = cipher.doFinal(src.getBytes());

System.out.println("私钥加密、公钥解密——加密 : " + Base64.encodeBase64String(result));

//3.私钥加密、公钥解密——解密

X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(rsaPublicKey.getEncoded());

keyFactory = KeyFactory.getInstance("RSA");

PublicKey publicKey = keyFactory.generatePublic(x509EncodedKeySpec);

cipher = Cipher.getInstance("RSA");

cipher.init(Cipher.DECRYPT_MODE, publicKey);

result = cipher.doFinal(result);

System.out.println("私钥加密、公钥解密——解密:" + new String(result));

//4.公钥加密、私钥解密——加密

x509EncodedKeySpec = new X509EncodedKeySpec(rsaPublicKey.getEncoded());

keyFactory = KeyFactory.getInstance("RSA");

publicKey = keyFactory.generatePublic(x509EncodedKeySpec);

cipher = Cipher.getInstance("RSA");

cipher.init(Cipher.ENCRYPT_MODE, publicKey);

result = cipher.doFinal(src.getBytes());

JPqOBfBd System.out.println("公钥加密、私钥解密——加密 : " + Base64.encodeBase64String(result));

//5.公钥加密、私钥解密——解密

pkcs8EncodedJPqOBfBdKeySpec = new PKCS8EncodedKeySpec(rsaPrivateKey.getEncoded());

keyFactory = KeyFactory.getInstance("RSA");

privateKey = keyFactory.generatePrivate(pkcs8EncodedKeySpec);

cipher = Cipher.getInstance("RSA");

cipher.init(Cipher.DECRYPT_MODE, privateKey);

result = cipher.doFinal(result);

System.out.println("公钥加密、私钥解密——解密:" + new String(result));

} catch (Exception e) {

e.printStackTrace();

}

}

}

四 实现效果

Public Key : MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBAJcBeOb97IdkkirBmx3MOY5e4eRwh0uvC2BcNlY1rDo0lZ8ibR1bl1RJXWkHv7U0ASO/5DBlnnnGbQRtsJlsCPMCAwEAAQ==

Private Key : MIIBVAIBADANBgkqhkiG9w0BAQEFAASCAT4wggE6AgEAAkEAlwF45v3sh2SSKsGbHcw5jl7h5HCHS68LYFw2VjWsOjsVnyJtHVuXVEldaQe/tTQBI7/kMGWeecZtBG2wmWwI8wIDAQABAkAdSkPRSl+ew3s2n+cemIZxfyYB0XHs1D84qapAfpixkUNvWL0A4ovrwsnwt4MEjAtWVTufNvTxIZcZdx+Q5DbBAiEA9TzzYMGRU+3mdlAx0ICF+NIqwvlqyvedKa4KSx55gVUCIQCdoeX6mqGRP78aQjYKWeogwliszjU5fN/LFvKZrcgBJwIhAMvbBLzzaykHY0IKW75kd/lkSyOUTY+20bAp+miDRqGZAiA6r36eeRkzqUbtcL8LxYPb5F79HtxD5dCvnIB/ZGp0uwIgWtXI7IxHjYCsNomSJdu1J3dU9KqQuW/eOHxrk/OgUYE=

私钥加密、公钥解密——加密 : VjkFsOiVeLvKES5RprhsJK9tdTzohdELLS7yluidCYEe7DkuCM9srj8kwadynHI4M0oLAfJhK6447hp7Ia8x7A==

私钥加密、公钥解密——解密:cakin24 security rsa

公钥加密、私钥解密——加密 : gAWl73UxHtO+EfKkpmfMdhtK0Vh7HB8n+30l1Hp8aAMIagD21h2x/q/Ns+soGsOXNovuNzaSGZenmZzcjB4VEA==

公钥加密、私钥解密——解密:cakin24 security rsa

五 应用场景

PS:关于加密解密感兴趣的朋友还可以参考本站在线工具:

在线RSA加密/解密工具:

http://tools.jb51.net/password/rsa_encode

文字在线加密解密工具(包含AES、DES、RC4等):

http://tools.jb51.net/password/txt_encode

MD5在线加密工具:

http://tools.jb51.net/password/CreateMD5Password

在线散列/哈希算法加密工具:

http://tools.jb51.net/password/hash_encrypt

在线MD5/hash/SHA-1/SHA-2/SHA-256/SHA-512/SHA-3/RIPEMD-160加密工具:

http://tools.jb51.net/password/hash_md5_sha

在线sha1/sha224/sha256/sha384/sha512加密工具:

http://tools.jb51.net/password/sha_encode

更多关于java相关内容感兴趣的读者可查看本站专题:《Java数学运算技巧总结》、《Java数据结构与算法教程》、《Java字符与字符串操作技巧总结》、《Java操作DOM节点技巧总结》和《Java缓存操作技巧汇总》

希望本文所述对大家java程序设计有所帮助。


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