前后端分离密码登陆加密RSA方案(java后端)

前言：密码加密有很多种方案，这里不做过多讨论，本篇文章是基于RSA加密实现。

首先在前端工程中需要引入加密js： "jsencrypt": "2.3.1",（注意单独导入可能报错，可以删除整个node_modules，然后重新npm install）

然后在登陆提交表单的地方代码修改如下：

// 引入js
import {JSEncrypt} from 'jsencrypt'

 // 提交表单方法
      dataFormSubmit () {
        this.dataForm.password = this.passwordEncryption(this.dataForm.password + ',' + new Date().getTime())
 　　　　 this.$http({
              url: this.$http.adornUrl('/sys/login'),
              method: 'post',
              data: this.$http.adornData({
                'username': this.dataForm.userName,
                'password': this.dataForm.password,
                'uuid': this.dataForm.uuid,
                'captcha': this.dataForm.captcha
              })
　　　　　　}，
　　//密码加密方法
　　passwordEncryption (passwordUser) {
  　　console.log(this.rsaKey + ' ********后台获取公钥********** ')
  　　let publicKey = this.rsaKey // 从后台获取公钥
 　　 let encryptor = new JSEncrypt()  // 新建JSEncrypt对象
  　　encryptor.setPublicKey(publicKey)  // 设置公钥
 　　 let passwordEncryp = encryptor.encrypt(passwordUser)  // 对密码进行加密
 　　console.log(passwordEncryp + ' ****************** ')
 　　 return passwordEncryp
　　},
// 获取公钥的方法
getRsaKey () {
  this.$http({
    url: this.$http.adornUrl('/sys/login/rsaKey'),
    method: 'get'
  }).then(({data}) => {
    this.rsaKey = data
  })
}

　　

后端工程代码如下

//controller 密码加密后用密钥解密
form.setPassword(AccountSecurityUtils.decrypt(form.getPassword()));

//AccountSecurityUtils 工具类

public static final String PUBLIC_KEY = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCsD1gI70BxYujhNw8NpaVKRXkcRofoeUbN9Dj5m3i3h9XAIS6LkjI01L4ieRpTHnMEzoXUY8a2/svDf//xuHuDJlZBNtCXK4DPx5x4zHdUWDjFGpWlMQzhsqQlfs0tkN5gP095g27L0ki/NrRuBpgxP1q2dHKpL37sBF8XNRpedwIDAQAB";

private static final String PRIVATE_KEY = "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";

/**
 * 加密数据和秘钥的编码方式
 */
public static final String UTF_8 = "UTF-8";

public static final String RSA_ALGORITHM_NO_PADDING = "RSA";

public static String decrypt(String password) {
    try {
        String getPass = decryptRSADefault(PRIVATE_KEY, password);
        String longtime = StringUtils.substringAfterLast(getPass, ",");
        if ((System.currentTimeMillis() - Long.valueOf(longtime) > 30 * 60 * 1000)) {
　　　　　　　　//抛出自定义异常
            throw new MYException("密码超时");
        }
        return StringUtils.substringBeforeLast(getPass, ",");
    } catch (Exception e) {
        if (e instanceof MYException) {
            throw new MYException(e.getMessage());
        }
        log.error("password is :" + password + " 密码解密异常：" + e.getMessage());
    }
    return null;
}

public static String decryptRSADefault(String privateKeyStr, String data) throws NoSuchAlgorithmException, InvalidKeySpecException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException, UnsupportedEncodingException {
    KeyFactory keyFactory = KeyFactory.getInstance(RSA_ALGORITHM_NO_PADDING);
    byte[] privateKeyArray = privateKeyStr.getBytes();
    byte[] dataArray = data.getBytes();
    PKCS8EncodedKeySpec pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(Base64.decodeBase64(privateKeyArray));
    PrivateKey privateKey = keyFactory.generatePrivate(pkcs8EncodedKeySpec);

    Cipher cipher = Cipher.getInstance(RSA_ALGORITHM_NO_PADDING);
    cipher.init(Cipher.DECRYPT_MODE, privateKey);
    return new String(cipher.doFinal(Base64.decodeBase64(dataArray)), UTF_8);
}

相关代码参考博客：https://blog.****.net/qq_37346607/article/details/85237368