package com.nova.sankuai.infra.utils;
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import javax.crypto.Cipher;
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import sun.misc.BASE64Decoder;
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import sun.misc.BASE64Encoder;
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import java.io.ByteArrayOutputStream;
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import java.security.KeyFactory;
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import java.security.KeyPair;
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import java.security.KeyPairGenerator;
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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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import java.security.spec.PKCS8EncodedKeySpec;
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import java.security.spec.X509EncodedKeySpec;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* Java RSA 加密工具类
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* 参考： https://blog.csdn.net/qy20115549/article/details/83105736
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*/
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public class RSAUtils {
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/**
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* 密钥长度 于原文长度对应 以及越长速度越慢
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*/
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private final static int KEY_SIZE = 1024;
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/**
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* 用于封装随机产生的公钥与私钥
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*/
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private static Map<Integer, String> keyMap = new HashMap<>();
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/** */
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/**
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* RSA最大加密明文大小
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*/
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private static final int MAX_ENCRYPT_BLOCK = 117;
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/** */
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/**
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* RSA最大解密密文大小
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*/
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private static final int MAX_DECRYPT_BLOCK = 128;
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/**
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* 随机生成密钥对
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*
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* @throws Exception
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*/
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public static void genKeyPair() throws Exception {
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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 = KeyPairGenerator.getInstance("RSA");
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// 初始化密钥对生成器
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keyPairGen.initialize(KEY_SIZE, 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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String publicKeyString = encryptBASE64(publicKey.getEncoded());
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// 得到私钥字符串
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String privateKeyString = encryptBASE64(privateKey.getEncoded());
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// 将公钥和私钥保存到Map
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//0表示公钥
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keyMap.put(0, publicKeyString);
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//1表示私钥
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keyMap.put(1, privateKeyString);
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}
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//编码返回字符串
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public static String encryptBASE64(byte[] key) throws Exception {
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return (new BASE64Encoder()).encodeBuffer(key);
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}
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//解码返回byte
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public static byte[] decryptBASE64(String key) throws Exception {
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return (new BASE64Decoder()).decodeBuffer(key);
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}
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/**
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* RSA公钥加密
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*
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* @param str 加密字符串
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* @param publicKey 公钥
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* @return 密文
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* @throws Exception 加密过程中的异常信息
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*/
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public static String encrypt(String str, String publicKey) throws Exception {
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//base64编码的公钥
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byte[] decoded = decryptBASE64(publicKey);
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RSAPublicKey pubKey = (RSAPublicKey) KeyFactory.getInstance("RSA").generatePublic(new X509EncodedKeySpec(decoded));
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//RSA加密
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Cipher cipher = Cipher.getInstance("RSA");
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cipher.init(Cipher.ENCRYPT_MODE, pubKey);
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byte[] data = str.getBytes();
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int inputLen = data.length;
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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int offSet = 0;
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byte[] cache;
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int i = 0;
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// 对数据分段加密
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while (inputLen - offSet > 0) {
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if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {
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cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);
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} else {
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cache = cipher.doFinal(data, offSet, inputLen - offSet);
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}
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out.write(cache, 0, cache.length);
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i++;
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offSet = i * MAX_ENCRYPT_BLOCK;
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}
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byte[] encryptedData = out.toByteArray();
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out.close();
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String outStr = encryptBASE64(encryptedData);
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return outStr;
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}
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/**
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* RSA私钥解密
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*
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* @param str 加密字符串
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* @param privateKey 私钥
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* @return 明文
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* @throws Exception 解密过程中的异常信息
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*/
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public static String decrypt(String str, String privateKey) throws Exception {
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//64位解码加密后的字符串
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byte[] inputByte = decryptBASE64(str);
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//base64编码的私钥
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byte[] decoded = decryptBASE64(privateKey);
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RSAPrivateKey priKey = (RSAPrivateKey) KeyFactory.getInstance("RSA").generatePrivate(new PKCS8EncodedKeySpec(decoded));
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//RSA解密
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Cipher cipher = Cipher.getInstance("RSA");
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cipher.init(Cipher.DECRYPT_MODE, priKey);
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int inputLen = inputByte.length;
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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int offSet = 0;
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byte[] cache;
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int i = 0;
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// 对数据分段解密
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while (inputLen - offSet > 0) {
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if (inputLen - offSet > MAX_DECRYPT_BLOCK) {
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cache = cipher.doFinal(inputByte, offSet, MAX_DECRYPT_BLOCK);
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} else {
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cache = cipher.doFinal(inputByte, offSet, inputLen - offSet);
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}
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out.write(cache, 0, cache.length);
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i++;
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offSet = i * MAX_DECRYPT_BLOCK;
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}
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String outStr = out.toString();
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return outStr;
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}
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public static void main(String[] args) throws Exception {
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long temp = System.currentTimeMillis();
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//生成公钥和私钥
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genKeyPair();
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//加密字符串
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// System.out.println("公钥:" + keyMap.get(0));
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// System.out.println("私钥:" + keyMap.get(1));
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// System.out.println("生成密钥消耗时间:" + (System.currentTimeMillis() - temp) / 1000.0 + "秒");
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String message = "{\"reqBody\":[{\"age\":\"18\",\"annualIncome\":\"1\",\"businessLicense\":1,\"car\":1,\"corporateTax\":1,\"creditCard\":1,\"custName\":\"测试\",\"custRemark\":\"这仅仅只是一个测试\",\"dataFrom\":\"朋友圈测试\",\"education\":1,\"house\":1,\"insurancePolicy\":1,\"loanAmount\":100000.0,\"marryStatus\":1,\"microLoan\":1,\"onBehalfOf\":\"1\",\"phoneNum\":\"18612345678\",\"profession\":\"测试工\",\"providentFund\":1,\"sex\":1,\"socialSecurity\":1}]}";
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System.out.println("原文:" + message);
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temp = System.currentTimeMillis();
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String pubKey = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCsDtrdQoBInH5227niqVTbSnzaLZOlBECMWbTpXGhTbdpCmap1qnvPojb3BcofuWIs+t3Uf0s2OlqhqrR+yuvB26e2uOgZsvhPQc69i3MwEH2vbr9oYYcuAlk9seCoPgUjFqwmTUQKg80DPJoKmtZDvMKvTQmRgtH8M8W75FyAzwIDAQAB";
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System.out.println(pubKey);
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String messageEn = encrypt(message, pubKey);
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System.out.println("密文:" + messageEn);
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System.out.println("加密消耗时间:" + (System.currentTimeMillis() - temp) / 1000.0 + "秒");
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temp = System.currentTimeMillis();
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String priKey = "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";
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// messageEn = "V0JE7azjTQkXaQLuZcHAW+duFZdAjBUEdMNPt/9KN1hsqxO7l4Ueooao6XaiHPZvbAxNfnIXNkTv\n" +
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// "xWVx19YWNRwNKy753EZW4HZzf2y/2NuR4Prj204UpDOpM6NdadkRHC7B1vkzRoWeviN46YWo9B1O\n" +
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// "230mHC63SUeha3XEFk9aSuLpMwkYwk1JQlXKkOl9N44HBPueS5eqKuQ2XqcPXF5EuYMIk1ZpXAHI\n" +
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// "BFNZnitKJok7MrxL1Kw5/gAMb3mFl4Ji/e7dZkXY5YO3WoyfAhKBSZUdEM1S/axRQrik4T0MQOZF\n" +
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// "mO/P5YqoP5RyiSHyosiw7ubqag6UgbpYJuqImoEDh2uRbXkWrN8UOG28pN/VXQMvM01Sb5t/9XkJ\n" +
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// "aM+eaxaEHwG7w531CbiKtm/2+WrU+Zv9evnHiE48OxwCx4AKpzYd4ZSBmzYMyaYKBSaTLyt+igBN\n" +
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// "wtPjB6vmkWgXMhAO4rZNHQwigXX3nMrAzllf5pdHl8d3EspUgnvwcyYlW6u/qnOPjeQUEaefDrny\n" +
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// "sKa3wDKKUSRr1dO90ADuZ5ctQMzT7uUJOAsizU2B/5XMJFJoZ3SZ41g8LcGiDsF3Jad4o/Fv9iQB\n" +
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// "g0xN5VtanF4EG7GdYX47NyvxQzO4XA2CR7MEv3j2vEplFZAe55cRjUmUhFHxrWxO5by3FgpIPNs=";
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String messageDe = decrypt(messageEn, priKey);
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System.out.println("解密:" + messageDe);
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System.out.println("解密消耗时间:" + (System.currentTimeMillis() - temp) / 1000.0 + "秒");;
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}
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}
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