在实际项目中考虑到用户数据的安全性,在用户登录时,前端需要对用户密码加密(防止用户密码泄露),服务端收到登录请求时先对密码进行解密,然后再进行用户验证登操作。本文使用 AES ECB 模式算法来实现前端机密后端解密基本流程。
基本流程
- 用户在登录页输入用户信息,点击登录按钮时,前端需要对用户密码进行加密,再去请求登录接口,进行登录;
- 如果用户选择记住密码,注意cookie或localStorage中要保存加密后的密码,以防止密码泄露;
- 当用户再次回到登录页时(用户退出或令牌过期时),从cookie或localStorage中拿到加密密码要先解密然后初始化到密码框中;
- 服务端收到登录请求,先进行密码解密,然后再去验证用户的有效性;
- 或者先根据用户名去获取用户信息,然后对该用户密码加密,再去跟前端传的密码比对,以验证密码的有效性。
后端加密算法
pom.xml 引入
xml
<dependency>
<groupId>org.bouncycastle</groupId>
<artifactId>bcprov-jdk15on</artifactId>
<version>1.56</version>
</dependency>
<!-- fastjson2 -->
<dependency>
<groupId>com.alibaba.fastjson2</groupId>
<artifactId>fastjson2</artifactId>
<version>2.0.51</version>
</dependency>
AES 工具类
java
package com.angel.ocean.util;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import com.alibaba.fastjson2.JSON;
import lombok.extern.slf4j.Slf4j;
import org.apache.tomcat.util.codec.binary.Base64;
import java.security.Security;
import java.util.Objects;
@Slf4j
public class AESUtil {
// AES 秘钥
private static final String key = "5JKRGV0QO4WK1WCWVK55YEU0A1NPOXOP";
private AESUtil() {}
/**
* AES 加密
*/
public static String encrypt(Object content) throws Exception {
String data = "";
if(null == content) {
return null;
}
// 判断content是否为字符串
if (content instanceof String) {
data = content.toString();
} else {
data = JSON.toJSONString(content);
}
// 将加密过的byte[]数据转换成Base64编码字符串
return base64ToString(aesECBEncrypt(data.getBytes(), key.getBytes()));
}
/**
* AES解密
*/
public static Object decrypt(String content) {
if(null == content) {
return null;
}
try {
byte[] base64 = stringToBase64(content);
byte[] bytes = aesECBDecrypt(base64, key.getBytes());
String result = new String(bytes);
String data = result.replaceAll("\"", "");
// 判断解密出来的数据是字符串还是json
if (data.startsWith("{") && data.endsWith("}")) {
return JSON.parse(data);
} else {
return data;
}
} catch (Exception e) {
log.error("AESUtil.decrypt() error, {}", e.getMessage(), e);
}
return null;
}
private static byte[] aesECBEncrypt (byte[] content, byte[] keyBytes) {
try {
SecretKeySpec key = new SecretKeySpec(keyBytes, "AES");
Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
Cipher cipher = Cipher.getInstance("AES/ECB/PKCS7Padding");
cipher.init(Cipher.ENCRYPT_MODE, key);
return cipher.doFinal(content);
} catch (Exception e) {
log.error("AESUtil.aesECBEncrypt() error, {}", e.getMessage(), e);
}
return null;
}
private static byte[] aesECBDecrypt(byte[] content, byte[] keyBytes) {
try {
SecretKeySpec key = new SecretKeySpec(keyBytes, "AES");
Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
Cipher cipher = Cipher.getInstance("AES/ECB/PKCS7Padding");
cipher.init(Cipher.DECRYPT_MODE, key);
return cipher.doFinal(content);
} catch (Exception e) {
log.error("AESUtil.aesECBDecrypt() error, {}", e.getMessage(), e);
}
return null;
}
/**
* 将字符串转换成Base64
*/
public static byte[] stringToBase64(String key) throws Exception {
return Base64.decodeBase64(key.getBytes());
}
/**
* 将Base64转换成字符串
*/
public static String base64ToString(byte[] key) throws Exception {
return new Base64().encodeToString(key);
}
public static void main(String[] args) throws Exception {
// 明文
String data = "123456";
// 加密
String encryptData = encrypt(data);
log.info("encryptData: {}", encryptData);
// 解密
String decryptData = Objects.requireNonNull(decrypt(encryptData)).toString();
log.info("decryptData: {}", decryptData);
}
}
main运行结果
Vue前端加密
安装crypto-js
javascript
npm install crypto-js
引入crypto-js
javascript
import CryptoJS from 'crypto-js'
AES 秘钥
javascript
const key = '5JKRGV0QO4WK1WCWVK55YEU0A1NPOXOP'
加密解密方法
javascript
methods: {
encrypt (data) {
var secretKey = CryptoJS.enc.Utf8.parse(key);
var srcs = CryptoJS.enc.Utf8.parse(data);
var encrypted = CryptoJS.AES.encrypt(srcs, secretKey, {mode:CryptoJS.mode.ECB,padding: CryptoJS.pad.Pkcs7});
return encrypted.toString();
},
decrypt(data) {
var secretKey = CryptoJS.enc.Utf8.parse(key);
var decrypt = CryptoJS.AES.decrypt(data, secretKey, {mode:CryptoJS.mode.ECB,padding: CryptoJS.pad.Pkcs7});
return CryptoJS.enc.Utf8.stringify(decrypt).toString();
}
}
密码:123456,加密后的密码截图: