若依实现前段后登录密码加密-编程知识

若依虽然有加密解密功能，然后只有前端有，在用户点击保存密码的时候，会将密码保存到本地，但是为了防止密码泄露，所以在保存的时候，进行加密，在回显密码的时候进行解密显示，用户在登录的时候密码照样会明文传输，我们可以使用，为了解决这个问题，我们可以在登陆的时候，前端加密，后端解密验证密码正确性。
代码如下：
首先去生成秘钥，然后复制里面的公钥和私钥
在这里插入图片描述

前端代码

然后把公钥和私钥粘贴到前端的jsencrypt.js文件中，注意粘贴的使用要先输入一对双引号，使用idea进行粘贴，如果使用vscode粘贴就无法出现\n

import JSEncrypt from 'jsencrypt/bin/jsencrypt.min'// 密钥对生成 http://web.chacuo.net/netrsakeypairconst publicKey = "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArWms4iFd/TMBkAae2FP8\n" +"4Typ80/uvIRo1cN9AR9ircKkIjpksCUC/mnopE1WsSk/Kqtf8aDAOxJ9Bs6drCs+\n" +"9GxfduwoIjbAR9mllzoP67ncn1dtuLXU6w/Va/pt8YebtzhZqfp7DVs5IGwkXf1c\n" +"Xxfw9dxa9F8ftlCEHSQxBFcn8707XJ3iGNRBcp8gS+Zofiaj8Xn1Ws4kUyBb6Dg4\n" +"f2SaBreaof7Wl9QWXkgXG7egHj4xtC5ztiBnFa8GC55ecBDLnO3EyTvY9PzvAd5Y\n" +"Aj7FDNN70w1zeazunX02oeMQa+TmtOGag73StoipsNbO8zbeeDblgXT1xNcrAx5m\n" +"XwIDAQAB"const privateKey = "MIIEvgIBADANBgkqhkiG9w0BAQEFAASCBKgwggSkAgEAAoIBAQCtaaziIV39MwGQ\n" +"Bp7YU/zhPKnzT+68hGjVw30BH2KtwqQiOmSwJQL+aeikTVaxKT8qq1/xoMA7En0G\n" +"zp2sKz70bF927CgiNsBH2aWXOg/rudyfV224tdTrD9Vr+m3xh5u3OFmp+nsNWzkg\n" +"bCRd/VxfF/D13Fr0Xx+2UIQdJDEEVyfzvTtcneIY1EFynyBL5mh+JqPxefVaziRT\n" +"IFvoODh/ZJoGt5qh/taX1BZeSBcbt6AePjG0LnO2IGcVrwYLnl5wEMuc7cTJO9j0\n" +"/O8B3lgCPsUM03vTDXN5rO6dfTah4xBr5Oa04ZqDvdK2iKmw1s7zNt54NuWBdPXE\n" +"1ysDHmZfAgMBAAECggEABPVqniS6HU1iFA48aI8uQfqMGYsFlppqrQIkBu4w0iso\n" +"qlnlGyxTw5afsmMLwZEeX0f7PFuOY6IJtTIfTBcIe9DFgg8Krr/GC8frdkGQxvrP\n" +"ljbXylpYtkgDoEzO7AMmrryLw9KHxj//iC/PcmiWRZnXqBAfAbHepEX1ISgxxp/z\n" +"UKNURlMNvCQT93p/3j9oacKIFMEKqShDTvus139uK9EmL3D8mm3Bp/kI4mOyKua3\n" +"byuGG6kpmEACclWhNdCKN8dz7jLYbCWcOdWD6koqdSZy10Dbf6BD0FPhVJ9oFRC2\n" +"g7l9vlihZJB9BkrZhb/+bDOhhb2kyrPUlVR6dxRzgQKBgQDfMeTGX8Bdi8MIEH3u\n" +"RbPt/vDR//sXFfEYt/p0gqCWZuAnT2eDo14pAuuQjc0idoQxpiazmAZR9/33td1L\n" +"KYKb5WBogb56+J7bI/w0u0MpG3TCyd6QIr1XXsDOuaEzhjKmwW3TwN1UI8YNjMGl\n" +"vb36Vy3PL3wYV+fFE28iI5ScfwKBgQDG5qQmE6I4+zKKloXTqfNGs0PGkOXzAYbr\n" +"eFDSePQGMb7qTWtnrBGAz9PqKXffzLIn/u2EO2cSheglSWfJKos55Fj/tFnTGuws\n" +"ELJZldOi1kXGeABK+Ur+yl3T3kti8PWXx2zDvmp98m0I0C5Qo+51gUDVLPnXOVAW\n" +"lE0DvhTGIQKBgQChac/ttynDfWQa3PJ182rg39MBzIKme3PVUJiM0juZCeVqCH7w\n" +"MKHUPwxlimekWNnZnjO3BmbruNGu55OW2/pdDFHgwpQjEtKv4SJwcE1t2TFj/eI7\n" +"kyQjn58I4i62uILBHnpy/bQTOZvuCLGzT7mo5ot2nvy8DjbLy/Y/VkQPuQKBgQCq\n" +"X1vSBdVaK8myLpc5pITvVZTDnNBrpC42utu4PcUBHVFkj6Zlql1f0iW6mYTGHieo\n" +"3NQFBYEXu74LWmJdTWTu1OtrNMgQbSpJ4I9070LWY+Zmx9mwXvPfZeaTGgHHIZGt\n" +"TjSbQxsjASpmdzSE/LbAzlODhsAHnF8+yA9kGkjfIQKBgEA2GzJIUnuzT8WTdSZL\n" +"rJ0/6SBkSd9rlQvBx2jWa4G92zD6++MeItbgEp8xlRKWzRfwGmEnt7R0SC3eGzWV\n" +"EToc3UVRi750Cd0qNo7Q7blfnzGuca16t5lTaeeCp3P8FVlDbhg1F5ijrDNItoSH\n" +"wWlvkBwJ0C1nQsBVrV08quVy"// 加密
export function encrypt(txt) {const encryptor = new JSEncrypt()encryptor.setPublicKey(publicKey) // 设置公钥return encryptor.encrypt(txt) // 对数据进行加密
}// 解密
export function decrypt(txt) {const encryptor = new JSEncrypt()encryptor.setPrivateKey(privateKey) // 设置私钥return encryptor.decrypt(txt) // 对数据进行解密
}

然后调用登录接口的encrypt方法，对密码进行加密
在这里插入图片描述
到这里，浏览器出现的密码被加密了，就说明前端代码就搞定了

后端代码

在com.ruoyi.common.utils.sign包下新建RsaUtils类，把私钥粘贴过来

package com.ruoyi.common.utils.sign;import org.apache.commons.codec.binary.Base64;import javax.crypto.Cipher;
import java.security.KeyFactory;
import java.security.PrivateKey;
import java.security.spec.PKCS8EncodedKeySpec;/*** RSA加密解密** @author ruoyi**/
public class RsaUtils {// Rsa 私钥public static String privateKey = "MIIEvgIBADANBgkqhkiG9w0BAQEFAASCBKgwggSkAgEAAoIBAQCtaaziIV39MwGQ\n" +"Bp7YU/zhPKnzT+68hGjVw30BH2KtwqQiOmSwJQL+aeikTVaxKT8qq1/xoMA7En0G\n" +"zp2sKz70bF927CgiNsBH2aWXOg/rudyfV224tdTrD9Vr+m3xh5u3OFmp+nsNWzkg\n" +"bCRd/VxfF/D13Fr0Xx+2UIQdJDEEVyfzvTtcneIY1EFynyBL5mh+JqPxefVaziRT\n" +"IFvoODh/ZJoGt5qh/taX1BZeSBcbt6AePjG0LnO2IGcVrwYLnl5wEMuc7cTJO9j0\n" +"/O8B3lgCPsUM03vTDXN5rO6dfTah4xBr5Oa04ZqDvdK2iKmw1s7zNt54NuWBdPXE\n" +"1ysDHmZfAgMBAAECggEABPVqniS6HU1iFA48aI8uQfqMGYsFlppqrQIkBu4w0iso\n" +"qlnlGyxTw5afsmMLwZEeX0f7PFuOY6IJtTIfTBcIe9DFgg8Krr/GC8frdkGQxvrP\n" +"ljbXylpYtkgDoEzO7AMmrryLw9KHxj//iC/PcmiWRZnXqBAfAbHepEX1ISgxxp/z\n" +"UKNURlMNvCQT93p/3j9oacKIFMEKqShDTvus139uK9EmL3D8mm3Bp/kI4mOyKua3\n" +"byuGG6kpmEACclWhNdCKN8dz7jLYbCWcOdWD6koqdSZy10Dbf6BD0FPhVJ9oFRC2\n" +"g7l9vlihZJB9BkrZhb/+bDOhhb2kyrPUlVR6dxRzgQKBgQDfMeTGX8Bdi8MIEH3u\n" +"RbPt/vDR//sXFfEYt/p0gqCWZuAnT2eDo14pAuuQjc0idoQxpiazmAZR9/33td1L\n" +"KYKb5WBogb56+J7bI/w0u0MpG3TCyd6QIr1XXsDOuaEzhjKmwW3TwN1UI8YNjMGl\n" +"vb36Vy3PL3wYV+fFE28iI5ScfwKBgQDG5qQmE6I4+zKKloXTqfNGs0PGkOXzAYbr\n" +"eFDSePQGMb7qTWtnrBGAz9PqKXffzLIn/u2EO2cSheglSWfJKos55Fj/tFnTGuws\n" +"ELJZldOi1kXGeABK+Ur+yl3T3kti8PWXx2zDvmp98m0I0C5Qo+51gUDVLPnXOVAW\n" +"lE0DvhTGIQKBgQChac/ttynDfWQa3PJ182rg39MBzIKme3PVUJiM0juZCeVqCH7w\n" +"MKHUPwxlimekWNnZnjO3BmbruNGu55OW2/pdDFHgwpQjEtKv4SJwcE1t2TFj/eI7\n" +"kyQjn58I4i62uILBHnpy/bQTOZvuCLGzT7mo5ot2nvy8DjbLy/Y/VkQPuQKBgQCq\n" +"X1vSBdVaK8myLpc5pITvVZTDnNBrpC42utu4PcUBHVFkj6Zlql1f0iW6mYTGHieo\n" +"3NQFBYEXu74LWmJdTWTu1OtrNMgQbSpJ4I9070LWY+Zmx9mwXvPfZeaTGgHHIZGt\n" +"TjSbQxsjASpmdzSE/LbAzlODhsAHnF8+yA9kGkjfIQKBgEA2GzJIUnuzT8WTdSZL\n" +"rJ0/6SBkSd9rlQvBx2jWa4G92zD6++MeItbgEp8xlRKWzRfwGmEnt7R0SC3eGzWV\n" +"EToc3UVRi750Cd0qNo7Q7blfnzGuca16t5lTaeeCp3P8FVlDbhg1F5ijrDNItoSH\n" +"wWlvkBwJ0C1nQsBVrV08quVy";/*** 私钥解密** @param privateKeyString 私钥* @param text             待解密的文本* @return 解密后的文本*/public static String decryptByPrivateKey(String text) throws Exception {return decryptByPrivateKey(privateKey, text);}/*** 私钥解密** @param privateKeyString 私钥* @param text             待解密的文本* @return 解密后的文本*/public static String decryptByPrivateKey(String privateKeyString, String text) throws Exception {PKCS8EncodedKeySpec pkcs8EncodedKeySpec5 = new PKCS8EncodedKeySpec(Base64.decodeBase64(privateKeyString));KeyFactory keyFactory = KeyFactory.getInstance("RSA");PrivateKey privateKey = keyFactory.generatePrivate(pkcs8EncodedKeySpec5);Cipher cipher = Cipher.getInstance("RSA");cipher.init(Cipher.DECRYPT_MODE, privateKey);byte[] result = cipher.doFinal(Base64.decodeBase64(text));return new String(result);}}

然后再登录接口那里，对密码进行解密同时如果解密成功抛出异常，代码如下：

/*** 登录方法* * @param loginBody 登录信息* @return 结果*/
@PostMapping("/login")
public AjaxResult login(@RequestBody LoginBody loginBody) throws Exception
{AjaxResult ajax = AjaxResult.success();// 生成令牌String token = loginService.login(loginBody.getUsername(), RsaUtils.decryptByPrivateKey(loginBody.getPassword()), loginBody.getCode(),loginBody.getUuid());ajax.put(Constants.TOKEN, token);return ajax;
}