使用hutool工具生成非对称加密公私密钥以及使用案例

1.导入hutool依赖

  <dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId><version>5.8.18</version></dependency>

2.直接复制代码

package com.common.utils;import cn.hutool.core.codec.Base64;
import cn.hutool.crypto.SecureUtil;
import cn.hutool.crypto.asymmetric.AsymmetricAlgorithm;
import cn.hutool.crypto.asymmetric.KeyType;
import cn.hutool.crypto.asymmetric.RSA;import java.security.KeyPair;
import java.util.LinkedList;/*** 非对称加密工具类** @author edimen*/
public class AsymmetricAlgorithmUtil {/*** 公钥加密（解密就要用到对应的私钥）** @param msg    明文信息* @param pubKey 公钥，用来加密明文* @return*/public static String encryptByPublic(String msg, String pubKey) {RSA rsa = new RSA(AsymmetricAlgorithm.RSA_ECB_PKCS1.getValue(), null, pubKey);return rsa.encryptBase64(msg, KeyType.PublicKey);}/*** 私钥解密** @param encryptMsg 公钥加密的密文* @param priKey     私钥，用来解密密文* @return*/public static String decryptByPrivate(String encryptMsg, String priKey) {RSA rsa = new RSA(AsymmetricAlgorithm.RSA_ECB_PKCS1.getValue(), priKey, null);return rsa.decryptStr(encryptMsg, KeyType.PrivateKey);}/*** 私钥加密（解密就要用到对应的公钥）** @param msg    明文信息* @param priKey 私钥，用来加密明文* @return*/public static String encryptByPrivate(String msg, String priKey) {RSA rsa = new RSA(AsymmetricAlgorithm.RSA_ECB_PKCS1.getValue(), priKey, null);return rsa.encryptBase64(msg, KeyType.PrivateKey);}/*** 公钥解密** @param encryptMsg 密文* @param pubKey     公钥，用来解密* @return*/public static String decryptByPublic(String encryptMsg, String pubKey) {RSA rsa = new RSA(AsymmetricAlgorithm.RSA_ECB_PKCS1.getValue(), null, pubKey);return rsa.decryptStr(encryptMsg, KeyType.PublicKey);}/*** 获取公私钥集合** @return*/public static LinkedList<String> getPriKeyAndPubKey() {KeyPair pair = SecureUtil.generateKeyPair("RSA");String privateKey = Base64.encode(pair.getPrivate().getEncoded());String publicKey = Base64.encode(pair.getPublic().getEncoded());LinkedList<String> keys = new LinkedList<>();keys.add(privateKey);keys.add(publicKey);return keys;}
}

3.测试案例

    public static void main(String[] args) {LinkedList<String> priKeyAndPubKey = AsymmetricAlgorithmUtil.getPriKeyAndPubKey();String privateKey = priKeyAndPubKey.get(0);String publicKey = priKeyAndPubKey.get(1);String text = "HelloWorld";String encryptByPublic = AsymmetricAlgorithmUtil.encryptByPublic(text, publicKey);System.out.println(encryptByPublic);String s = AsymmetricAlgorithmUtil.decryptByPrivate(encryptByPublic, privateKey);System.out.println("公钥加密私钥解密："+s);String encryptByPrivate = AsymmetricAlgorithmUtil.encryptByPrivate(text, privateKey);System.out.println(encryptByPrivate);String s1 = AsymmetricAlgorithmUtil.decryptByPublic(encryptByPrivate,publicKey);System.out.println("私钥加密公钥解密:"+s1);}