若依ruoyi前端vue使用jsencrypt.js加密后端java进行RSA解密（前后端交互RSA加解密）

目录

• 1、前后端RSA加解密实现思路
• 2、前端
• 3、后端

1、前后端RSA加解密实现思路

按照约定来说公钥一般用来加密，大家都可以获取得到，私钥用来解密，当然你也可以混着用，以下示例是前端通过加密，后端解密.

—–BEGIN PUBLIC KEY—–
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ81AMIIBCgKCAQEA1+05vAf7m5NcLNLkRtsm
gp+QdzcW6MVdayGTGBJG0vUonkFJ1Zy4fKP//xg0nZdf8yrPf0LxtiVhK0CcZrFz
2heK3/RT4bWPvO5D+W93uf1lJYhj4huHza0TLaGen/25QQd65FLHy6CkGKtgYxlZx
FeJpONiX6QTOv1QvAVOi+sz+iNu2ODMLAYBMMTo269clFJHSzK2P6qAf1v5jhG6rh
cLOJDwFR/jeRnac/ZGyStKPPi4IsC8uvO6o8TmJ2B/CtfOTrAs710337M6YP2S1d
AP5pWZO936kNuatU4AJufTULQBOYclP0esFXCH3I8agU0zOYnIrpp0sJg9WrtL4ze
DQIDAQAB
—–END PUBLIC KEY—–

私钥

—–BEGIN PRIVATE KEY—–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—–END PRIVATE KEY—–

2、前端

//安装好jsencrypt.js并引入（若依已经添加该组件）src/utils/jsencrypt.jsimport JSEncrypt from 'jsencrypt/bin/jsencrypt.min'//在你需要使用的地方引入组件，比如下面的加密import { encrypt } from '@/utils/jsencrypt'//...//将表单中的用户名加密，根据submit提交到后端const username = encrypt(userInfo.username);//...

3、后端

/** * 登录方法 ** @param loginBody 登录信息 * @return 结果 */@PostMapping("/login")public AjaxResult login(@RequestBody LoginBody loginBody){//RSA解密//前提是RSA的公钥私钥是匹配的，另外这里可以使用私钥给字符串解密String username = RSAUtils.decryptRSADefault(RSAUtils.PRI_KEY, loginBody.getUsername());//...}

/*** RSA加解密工具类*/public class RSAUtils {//需要跟公钥配对public static final String PRI_KEY ="MIIBVAIBAD5ANBgkqhkiG9w0BAQEFAASCAT4wggE6AgEAAkEAqhHyZfSsYourNxaY\n" +"7Nt+Pr5grxkiA50efORdI5U5lsW79MmFnusUA355oaSXcLhu5xxB38SMSyP2KvuKN\n" +"PuH3o5wIDAQABAkAfoiLyL+Z4lf4Myxk6xUDgLaWGximj20CUf+5BKKnlrK+Ed8gA\n" +"kM0HqoTt2UZwA5E2MzS4EI2gjfQhz5X28uqxAiEA3wNFxfrCZlSZHb0gn2zDpWow\n" +"cSxQA5giCstxGUoOqlW8CIQDDOerGKH5OmCJ4Z21v+F25WaHYPxCFMvwxpcw99Ecv\n" +"DQIgIdhDTIqD2jfYjPTY8Jj3EDGPbH2HHuffvflECt3Ek60CIQCFRlCkHpi7hthh\n" +"YhovyloRYsM+5/0BzlEAuO0ktMQIgSPT3aFAgJYwKpqRYKlLDVcflZFCKY7u3\n" +"UP8iW5i1Qw0Y=";// 加密数据和秘钥的编码方式public static final String UTF_8 = "UTF-8";// 填充方式public static final String AES_ALGORITHM = "AES/CFB/PKCS5Padding";public static final String RSA_ALGORITHM = "RSA/ECB/PKCS1Padding";public static final String RSA_ALGORITHM_NOPADDING = "RSA";/** *解密接收数据 */public static String decryptReceivedData(PublicKey externalPublicKey, PrivateKey selfPrivateKey, String receiveData) throws InvalidKeyException, NoSuchPaddingException, NoSuchAlgorithmException, BadPaddingException, IllegalBlockSizeException, UnsupportedEncodingException, InvalidAlgorithmParameterException, DecoderException {@SuppressWarnings("unchecked")Map receivedMap = (Map) JSON.parse(receiveData);// receivedMap为请求方通过from urlencoded方式，请求过来的参数列表String inputSign = receivedMap.get("sign");// 用请求方提供的公钥验签，能配对sign，说明来源正确inputSign = decryptRSA(externalPublicKey, inputSign);// 校验sign是否一致String sign = sha256(receivedMap);if (!sign.equals(inputSign)) {// sign校验不通过，说明双方发送出的数据和对方收到的数据不一致System.out.println("input sign: " + inputSign + ", calculated sign: " + sign);return null;}// 解密请求方在发送请求时，加密data字段所用的对称加密密钥String key = receivedMap.get("key");String salt = receivedMap.get("salt");key = decryptRSA(selfPrivateKey, key);salt = decryptRSA(selfPrivateKey, salt);// 解密data数据String data = decryptAES(key, salt, receivedMap.get("data"));System.out.println("接收到的data内容：" + data);return data;}/** *加密数据组织示例 */public static String encryptSendData(PublicKey externalPublicKey, PrivateKey selfPrivateKey, JSONObject sendData) throws NoSuchAlgorithmException, InvalidKeySpecException,InvalidKeyException, NoSuchPaddingException, UnsupportedEncodingException, BadPaddingException,IllegalBlockSizeException, InvalidAlgorithmParameterException {// 随机生成对称加密的密钥和IV (IV就是加盐的概念，加密的偏移量)String aesKeyWithBase64 = genRandomAesSecretKey();String aesIVWithBase64 = genRandomIV();// 用接收方提供的公钥加密key和salt，接收方会用对应的私钥解密String key = encryptRSA(externalPublicKey, aesKeyWithBase64);String salt = encryptRSA(externalPublicKey, aesIVWithBase64);// 组织业务数据信息，并用上面生成的对称加密的密钥和IV进行加密System.out.println("发送的data内容：" + sendData.toJSONString());String cipherData = encryptAES(aesKeyWithBase64, aesIVWithBase64, sendData.toJSONString());// 组织请求的key、value对Map requestMap = new TreeMap();requestMap.put("key", key);requestMap.put("salt", salt);requestMap.put("data", cipherData);requestMap.put("source", "由接收方提供"); // 添加来源标识// 计算sign，并用请求方的私钥加签，接收方会用请求方发放的公钥验签String sign = sha256(requestMap);requestMap.put("sign", encryptRSA(selfPrivateKey, sign));// 注意：请务必以form urlencoded方式，否则base64转码后的个别字符可能会被转成空格，对方接收后将无法正常处理JSONObject json = new JSONObject();json.putAll(requestMap);return json.toString();}/** *Description: 获取随机的对称加密的密钥 */private static String genRandomAesSecretKey() throws NoSuchAlgorithmException, UnsupportedEncodingException,IllegalBlockSizeException, BadPaddingException, InvalidKeyException, NoSuchPaddingException {KeyGenerator keyGen = KeyGenerator.getInstance("AES");keyGen.init(128);SecretKey secretKey = keyGen.generateKey();String keyWithBase64 = Base64.encodeBase64(secretKey.getEncoded()).toString();return keyWithBase64;}private static String genRandomIV() {SecureRandom r = new SecureRandom();byte[] iv = new byte[16];r.nextBytes(iv);String ivParam = Base64.encodeBase64(iv)+"";return ivParam;}/** * 对称加密数据 */private static String encryptAES(String keyWithBase64, String ivWithBase64, String plainText)throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException,BadPaddingException, UnsupportedEncodingException, InvalidAlgorithmParameterException {byte[] keyWithBase64Arry = keyWithBase64.getBytes();byte[] ivWithBase64Arry = ivWithBase64.getBytes();SecretKeySpec key = new SecretKeySpec(Base64.decodeBase64(keyWithBase64Arry), "AES");IvParameterSpec iv = new IvParameterSpec(Base64.decodeBase64(ivWithBase64Arry));Cipher cipher = Cipher.getInstance(AES_ALGORITHM);cipher.init(Cipher.ENCRYPT_MODE, key, iv);return Base64.encodeBase64(cipher.doFinal(plainText.getBytes(UTF_8))).toString();}/** * 对称解密数据 */private static String decryptAES(String keyWithBase64, String ivWithBase64, String cipherText)throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException,BadPaddingException, UnsupportedEncodingException, InvalidAlgorithmParameterException {byte[] keyWithBase64Arry = keyWithBase64.getBytes();byte[] ivWithBase64Arry = ivWithBase64.getBytes();byte[] cipherTextArry = cipherText.getBytes();SecretKeySpec key = new SecretKeySpec(Base64.decodeBase64(keyWithBase64Arry), "AES");IvParameterSpec iv = new IvParameterSpec(Base64.decodeBase64(ivWithBase64Arry));Cipher cipher = Cipher.getInstance(AES_ALGORITHM);cipher.init(Cipher.DECRYPT_MODE, key, iv);return new String(cipher.doFinal(Base64.decodeBase64(cipherTextArry)), UTF_8);}/** * 非对称加密，根据公钥和原始内容产生加密内容 */private static String encryptRSA(Key key, String plainText)throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, UnsupportedEncodingException,BadPaddingException, IllegalBlockSizeException, InvalidAlgorithmParameterException {Cipher cipher = Cipher.getInstance(RSA_ALGORITHM);cipher.init(Cipher.ENCRYPT_MODE, key);return Base64.encodeBase64(cipher.doFinal(plainText.getBytes(UTF_8))).toString();}/** * 根据私钥和加密内容产生原始内容 */private static String decryptRSA(Key key, String content) throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, DecoderException, BadPaddingException, IllegalBlockSizeException, UnsupportedEncodingException, InvalidAlgorithmParameterException {Cipher cipher = Cipher.getInstance(RSA_ALGORITHM);cipher.init(Cipher.DECRYPT_MODE, key);byte[] contentArry = content.getBytes();return new String(cipher.doFinal(Base64.decodeBase64(contentArry)), UTF_8);}/** * 计算sha256值 * * @param paramMap * @return 签名后的所有数据，原始数据+签名 */private static String sha256(Map paramMap) {Map params = new TreeMap(paramMap);StringBuilder concatStr = new StringBuilder();for (Map.Entry entry : params.entrySet()) {if ("sign".equals(entry.getKey())) {continue;}concatStr.append(entry.getKey() + "=" + entry.getValue() + "&");}return DigestUtils.md5Hex(concatStr.toString());}/** * 创建RSA的公钥和私钥示例 将生成的公钥和私钥用Base64编码后打印出来 * @throws NoSuchAlgorithmException */public static void createKeyPairs() throws NoSuchAlgorithmException {KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");keyPairGenerator.initialize(2048);KeyPair keyPair = keyPairGenerator.generateKeyPair();RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();System.out.println("公钥"+Base64.encodeBase64(publicKey.getEncoded()));System.out.println("私钥"+Base64.encodeBase64(privateKey.getEncoded()));}/** *Description:默认的RSA解密方法 一般用来解密 参数 小数据 */public static String decryptRSADefault(String privateKeyStr,String data) {try{KeyFactory keyFactory = KeyFactory.getInstance(RSA_ALGORITHM_NOPADDING);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_NOPADDING);cipher.init(Cipher.DECRYPT_MODE, privateKey);return new String(cipher.doFinal(Base64.decodeBase64(dataArray)), UTF_8);}catch (Exception e){e.printStackTrace();}return "";}/** * 自测 * @param args */public static void main(String[] args) {String password = "VzQuPo/OtqlYtDzx4nM9cctzbHir92FcSms9yF5aGVtGXVYOOnsjQR16QrgpLf5/V6Ma2Iuze8ioZmNJuqdcJw==";String result = RSAUtils.decryptRSADefault(PRI_KEY, password);System.out.println("password="+result);}}

原有文章基础上补充加密方法

/** *Description:默认的RSA加密方法 一般用来解密 参数 小数据【不好用】 */public static String encryptRSADefault(String publicKeyStr,String data) {try{KeyFactory keyFactory = KeyFactory.getInstance(RSA_ALGORITHM_NOPADDING);byte[] publicKeyArray = publicKeyStr.getBytes();byte[] dataArray = data.getBytes();X509EncodedKeySpec rsaPublicKeySpec = new X509EncodedKeySpec(Base64.decodeBase64(publicKeyArray));PublicKey publicKey = keyFactory.generatePublic(rsaPublicKeySpec);Cipher cipher = Cipher.getInstance(RSA_ALGORITHM_NOPADDING);cipher.init(Cipher.ENCRYPT_MODE, publicKey);byte[] encryptedData = cipher.doFinal(data.getBytes(UTF_8));return Base64.encodeBase64String(encryptedData);}catch (Exception e){e.printStackTrace();}return "";}/** * RSA加密 * * @param publicKeyStr 公钥字符串 * @param data 要加密的数据 * @return 加密后的Base64编码字符串 * @throws NoSuchAlgorithmException * @throws InvalidKeySpecException * @throws Exception */public static String encryptRSA(String publicKeyStr, String data)throws NoSuchAlgorithmException, InvalidKeySpecException, Exception {KeyFactory keyFactory = KeyFactory.getInstance(RSA_ALGORITHM_NOPADDING);byte[] publicKeyArray = publicKeyStr.getBytes(UTF_8);X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(Base64.decodeBase64(publicKeyArray));PublicKey publicKey = keyFactory.generatePublic(x509EncodedKeySpec);Cipher cipher = Cipher.getInstance(RSA_ALGORITHM_NOPADDING);cipher.init(Cipher.ENCRYPT_MODE, publicKey);byte[] encryptedData = cipher.doFinal(data.getBytes(UTF_8));return Base64.encodeBase64String(encryptedData);}