package com.stylefeng.guns.modular.system.util.MallBook.util;
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import java.io.BufferedWriter;
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import java.io.FileWriter;
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import java.security.KeyPair;
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import java.security.KeyPairGenerator;
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import java.security.NoSuchAlgorithmException;
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import java.security.SecureRandom;
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import java.security.interfaces.RSAPrivateKey;
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import java.security.interfaces.RSAPublicKey;
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/**
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* 公私钥代码生成
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* @Author xiaogc
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* @Date 2021/12/21 14:22
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*/
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public class RSAEncryptGeneration {
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public static void main(String[] args) {
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// 生成一对公私钥到指定路径下 .pfx私钥 .cer公钥
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RSAEncryptGeneration.genKeyPair("D:\\tools");
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}
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/**
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* 随机生成密钥对
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*/
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public static void genKeyPair(String filePath) {
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// KeyPairGenerator类用于生成公钥和私钥对，基于RSA算法生成对象
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KeyPairGenerator keyPairGen = null;
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try {
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keyPairGen = KeyPairGenerator.getInstance("RSA");
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} catch (NoSuchAlgorithmException e) {
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e.printStackTrace();
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}
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// 初始化密钥对生成器，密钥大小为96-1024位
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keyPairGen.initialize(1024, new SecureRandom());
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// 生成一个密钥对，保存在keyPair中
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KeyPair keyPair = keyPairGen.generateKeyPair();
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// 得到私钥
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RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();
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// 得到公钥
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RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();
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try {
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// 得到公钥字符串
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String publicKeyString = Base64.encode(publicKey.getEncoded());
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System.out.println("公钥字符串:"+publicKeyString);
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// 得到私钥字符串
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String privateKeyString = Base64.encode(privateKey.getEncoded());
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System.out.println("私钥字符串:"+privateKeyString);
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// 将密钥对写入到文件 .pfx私钥 .cer公钥
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FileWriter pubfw = new FileWriter(filePath + "/merchant_no.cer");
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FileWriter prifw = new FileWriter(filePath + "/merchant_no.pfx");
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BufferedWriter pubbw = new BufferedWriter(pubfw);
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BufferedWriter pribw = new BufferedWriter(prifw);
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pubbw.write(publicKeyString);
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pribw.write(privateKeyString);
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pubbw.flush();
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pubbw.close();
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pubfw.close();
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pribw.flush();
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pribw.close();
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prifw.close();
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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}
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