使用RSA实现前端公钥加密后端私钥解密

article/2025/9/25 0:27:57

听说你还不会RSA算法实现前端加密后端解密？？？那就来看这里…

RSA前端加密后端解密避免出现明文密码传递话不多说,直接开撸

前端JS

项目中先添加rsa.js文件
链接：https://pan.baidu.com/s/1r9930MkS4n8TR9IsOIXV-Q
提取码：hd52
添加完成之后在项目中引入rsa.js

<script src="js/rsa.js"></script> <!--根据自己的文件路径添加即可-->

使用Vue，element ui实现

var encrypt = new JSEncrypt();
$.ajax({type: 'post',url: 'log/publicKey',data: '',dataType: 'json',success: function (data) {encrypt.setPublicKey(data.public_key)_this.password = encrypt.encrypt(_this.password)$.ajax({type: 'post',url: 'log/login',data: {username: _this.username,password: _this.password},dataType: 'json',success: function (data) {if (data.code == 200) {<!--成功之后的操作...-->} else {<!--失败操作-->}}})}})

后端代码

Controller层

/*** 获取公钥*/
@ResponseBody@PostMapping("publicKey")public Map<String, Object> public_key() {Map<String, Object> map = new HashMap<>();map.put("public_key", KeyManager.getPublic_key());return map;}
/*** 登录** @param username 用户名* @param password 加密后的密码* @param session* @return* @throws Exception*/@PostMapping("login")@ResponseBodypublic R login(String username, String password, HttpSession session, HttpServletRequest request) throws Exception {String pwd = MD5_u.md5s_32(adminUserService.encryptionResult(password));// 判断用户密码错误次数是否过多if (FrequencyUtil.checkFrequency(username, 5)) {logger.info("密码错误次数过多,当前管理员为:{}", username);return R.ok().put("msg", "登录错误次数过多");}String ip = IpUtil.getRemoteIp(request);// 判断同一ip错误次数是否过多if (FrequencyUtil.checkFrequency(ip, 10)) {logger.info("密码错误次数过多,当前管理员为:{}", username);return R.ok().put("msg", "登录错误次数过多");}AdminUser byUsernameAndPassword = adminUserService.findByUsernameAndPassword(username, pwd);if (byUsernameAndPassword == null) {logger.info("用户名或密码错误，当前管理员为:{}", username);return R.ok().put("msg", "用户名或密码错误");} else if (byUsernameAndPassword.getState().equals(0)) {return R.ok().put("msg", "账户已被冻结，请联系管理员");}session.setAttribute("user", byUsernameAndPassword.getUsername());logger.info("管理员登录成功.....当前登录的管理员为:{}", username);FrequencyUtil.removeFrequency(username);FrequencyUtil.removeFrequency(ip);return R.ok().put("code", "200");}

工具类

public class KeyManager {//公钥private static String public_key;//私钥private static String private_key;public static String getPublic_key() {return public_key;}public static void setPublic_key(String public_key) {KeyManager.public_key = public_key;}public static String getPrivate_key() {return private_key;}public static void setPrivate_key(String private_key) {KeyManager.private_key = private_key;}}

public class RSAUtil {//生成秘钥对public static KeyPair getKeyPair() throws Exception {KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");keyPairGenerator.initialize(1024);KeyPair keyPair = keyPairGenerator.generateKeyPair();return keyPair;}//获取公钥(Base64编码)public static String getPublicKey(KeyPair keyPair){PublicKey publicKey = keyPair.getPublic();byte[] bytes = publicKey.getEncoded();return byte2Base64(bytes);}//获取私钥(Base64编码)public static String getPrivateKey(KeyPair keyPair){PrivateKey privateKey = keyPair.getPrivate();byte[] bytes = privateKey.getEncoded();return byte2Base64(bytes);}//将Base64编码后的公钥转换成PublicKey对象public static PublicKey string2PublicKey(String pubStr) throws Exception{byte[] keyBytes = base642Byte(pubStr);X509EncodedKeySpec keySpec = new X509EncodedKeySpec(keyBytes);KeyFactory keyFactory = KeyFactory.getInstance("RSA");PublicKey publicKey = keyFactory.generatePublic(keySpec);return publicKey;}//将Base64编码后的私钥转换成PrivateKey对象public static PrivateKey string2PrivateKey(String priStr) throws Exception{byte[] keyBytes = base642Byte(priStr);PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(keyBytes);KeyFactory keyFactory = KeyFactory.getInstance("RSA");PrivateKey privateKey = keyFactory.generatePrivate(keySpec);return privateKey;}//公钥加密public static byte[] publicEncrypt(byte[] content, PublicKey publicKey) throws Exception{Cipher cipher = Cipher.getInstance("RSA");cipher.init(Cipher.ENCRYPT_MODE, publicKey);byte[] bytes = cipher.doFinal(content);return bytes;}//私钥解密public static byte[] privateDecrypt(byte[] content, PrivateKey privateKey) throws Exception{Cipher cipher = Cipher.getInstance("RSA");cipher.init(Cipher.DECRYPT_MODE, privateKey);byte[] bytes = cipher.doFinal(content);return bytes;}//字节数组转Base64编码public static String byte2Base64(byte[] bytes){BASE64Encoder encoder = new BASE64Encoder();return encoder.encode(bytes);}//Base64编码转字节数组public static byte[] base642Byte(String base64Key) throws IOException{BASE64Decoder decoder = new BASE64Decoder();return decoder.decodeBuffer(base64Key);}
}

Service层

public interface AdminUserService {String encryptionResult(String password) throws Exception;
}

impl实现层

/*** rsa算法解密** @param password* @return* @throws Exception*/@Overridepublic String encryptionResult(String password) throws Exception {// 将Base64编码后的私钥转换成PrivateKey对象PrivateKey privateKey = RSAUtil.string2PrivateKey(KeyManager.getPrivate_key());// 加密后的内容Base64解码byte[] base642Byte = RSAUtil.base642Byte(password);// 用私钥解密byte[] privateDecrypt = RSAUtil.privateDecrypt(base642Byte, privateKey);return new String(privateDecrypt);}

登录界面
前端加密后的密码
IvY24AmBOh2ihwDL4yalYzB58/EEUw4ELzkp4e6hxZJPdm5XQ3K40DzZlUAcLZ3azXBIz72o8d+8niP0siqHvNIF03Bf9xlW3OeeOm71KfUwO1FcCrQMtLuqecfufalm6EXX4po5o25w04zXoJ5Nbm14p4uPjZ/I4u//PSog+e0=
后端解密后的密码
Sjfh@123