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1.前端所需文件

import JSEncrypt from 'jsencrypt/bin/jsencrypt.min'// 密钥对生成 http://web.chacuo.net/netrsakeypairconst publicKey = 'MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBAKoR8mX0rGKLqzcWmOzbfj64K8ZIgOdH\n' +'nzkXSOVOZbFu/TJhZ7rFAN+eaGkl3C4buccQd/EjEsj9ir7ijT7h96MCAwEAAQ=='const privateKey = 'MIIBVAIBADANBgkqhkiG9w0BAQEFAASCAT4wggE6AgEAAkEAqhHyZfSsYourNxaY\n' +'7Nt+PrgrxkiA50efORdI5U5lsW79MmFnusUA355oaSXcLhu5xxB38SMSyP2KvuKN\n' +'PuH3owIDAQABAkAfoiLyL+Z4lf4Myxk6xUDgLaWGximj20CUf+5BKKnlrK+Ed8gA\n' +'kM0HqoTt2UZwA5E2MzS4EI2gjfQhz5X28uqxAiEA3wNFxfrCZlSZHb0gn2zDpWow\n' +'cSxQAgiCstxGUoOqlW8CIQDDOerGKH5OmCJ4Z21v+F25WaHYPxCFMvwxpcw99Ecv\n' +'DQIgIdhDTIqD2jfYjPTY8Jj3EDGPbH2HHuffvflECt3Ek60CIQCFRlCkHpi7hthh\n' +'YhovyloRYsM+IS9h/0BzlEAuO0ktMQIgSPT3aFAgJYwKpqRYKlLDVcflZFCKY7u3\n' +'UP8iWi1Qw0Y='// 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
}

  this.loginForm = {username: username === undefined ? this.loginForm.username : username,password: password === undefined ? this.loginForm.password : decrypt(password),rememberMe: rememberMe === undefined ? false : Boolean(rememberMe)};

2.后端所用工具类

package com.nriat.site.common.utils;import org.apache.commons.codec.binary.Base64;import javax.crypto.Cipher;
import java.security.*;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;/*** RSA加密解密** @author ruoyi**/
public class RsaUtils {// Rsa 私钥public static String privateKey = "MIICdwIBADANBgkqhkiG9w0BAQEFAASCAmEwggJdAgEAAoGBALRMc5+BuKvnySp5" +"0geS+tvGSS4Kfe6/Gurfbc4GTJoUeZPnnAbdcD2NvQ9PXrpTIMW4VuXBfJ2vyE4x" +"dM4U9PIsnHOZPqPDRqIlubnCqjuvV63THV5rvIwPsuadZvf+cnAk4HIF8g9FLNH5" +"Exn8lRrc/ZYqOzuFkc+yuWZj57SzAgMBAAECgYAWNai0iF1AR9Ae/Fyj9DYUpotT" +"MZWruDzPm/BBxcLf5A/J6Wjt648s9e3JGgTYPO83i+qgaMI6BnJNN4hk7m3xxg2o" +"1mooI3e6aef3xz3H5CYwerkur22hgQpO3XXX97y0NFx/ST8lg9I1zMh63+5dHfXJ" +"MHe5WG1+YU7gxlN1sQJBAOKgMuNoSR7Gk8ehxFWt+lM1Q0RkUhd+REVN2KsWEjaP" +"aaxYKU5FU6p0GrStGAcvbzUaYUvXelIyk+VnVtCyvjkCQQDLqwuXtl9Iw/vsbji9" +"o7cKUYSwmbye8Yr208qBXzebiLcY1s+PKqGyo9y/1tAxCYyyKjOv99FOC7bAHuiw" +"+cpLAkEAotDNPqvxvHaWPVpvH886hQVDKqOYhuBkVBY1j9TviNtH5FYCdwU/srpv" +"ZVbmaGMf1lr5g+9vJhbIQowXxyBjoQJAJSb/h15SRWDS7M8ydI2Pz0cNkHWK7eeb" +"9OivkSgAadPnqpVM6Y3aT08K7sfN1JQsYTfHk/r96GHEpYk940K9vwJBALttsP0T" +"l9wVKKG995ZPdxc7nSj1R9oAEPAOOGSamlFV/s7+TFBJdgOZVw4T5+GjGOY5/Rft" +"wJvc9/lWECKRV4g=";/*** 私钥解密** @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);}/*** 公钥解密** @param publicKeyString 公钥* @param text            待解密的信息* @return 解密后的文本*/public static String decryptByPublicKey(String publicKeyString, String text) throws Exception {X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(Base64.decodeBase64(publicKeyString));KeyFactory keyFactory = KeyFactory.getInstance("RSA");PublicKey publicKey = keyFactory.generatePublic(x509EncodedKeySpec);Cipher cipher = Cipher.getInstance("RSA");cipher.init(Cipher.DECRYPT_MODE, publicKey);byte[] result = cipher.doFinal(Base64.decodeBase64(text));return new String(result);}/*** 私钥加密** @param privateKeyString 私钥* @param text             待加密的信息* @return 加密后的文本*/public static String encryptByPrivateKey(String privateKeyString, String text) throws Exception {PKCS8EncodedKeySpec pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(Base64.decodeBase64(privateKeyString));KeyFactory keyFactory = KeyFactory.getInstance("RSA");PrivateKey privateKey = keyFactory.generatePrivate(pkcs8EncodedKeySpec);Cipher cipher = Cipher.getInstance("RSA");cipher.init(Cipher.ENCRYPT_MODE, privateKey);byte[] result = cipher.doFinal(text.getBytes());return Base64.encodeBase64String(result);}/*** 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);}/*** 公钥加密** @param publicKeyString 公钥* @param text            待加密的文本* @return 加密后的文本*/public static String encryptByPublicKey(String publicKeyString, String text) throws Exception {X509EncodedKeySpec x509EncodedKeySpec2 = new X509EncodedKeySpec(Base64.decodeBase64(publicKeyString));KeyFactory keyFactory = KeyFactory.getInstance("RSA");PublicKey publicKey = keyFactory.generatePublic(x509EncodedKeySpec2);Cipher cipher = Cipher.getInstance("RSA");cipher.init(Cipher.ENCRYPT_MODE, publicKey);byte[] result = cipher.doFinal(text.getBytes());return Base64.encodeBase64String(result);}/*** 构建RSA密钥对** @return 生成后的公私钥信息*/public static RsaKeyPair generateKeyPair() throws NoSuchAlgorithmException {KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");keyPairGenerator.initialize(1024);KeyPair keyPair = keyPairGenerator.generateKeyPair();RSAPublicKey rsaPublicKey = (RSAPublicKey) keyPair.getPublic();RSAPrivateKey rsaPrivateKey = (RSAPrivateKey) keyPair.getPrivate();String publicKeyString = Base64.encodeBase64String(rsaPublicKey.getEncoded());String privateKeyString = Base64.encodeBase64String(rsaPrivateKey.getEncoded());return new RsaKeyPair(publicKeyString, privateKeyString);}/*** RSA密钥对对象*/public static class RsaKeyPair {private final String publicKey;private final String privateKey;public RsaKeyPair(String publicKey, String privateKey) {this.publicKey = publicKey;this.privateKey = privateKey;}public String getPublicKey() {return publicKey;}public String getPrivateKey() {return privateKey;}}
}

3.登录代码

  public TokenVo login(String username, String password) {try {password=RsaUtils.decryptByPrivateKey(password);}catch (Exception e) {log.error("Failed to decrypt password: {}", e.getMessage());throw new CustomException(ResultCodeEnum.LOGIN_DECRYPT_ERROR);}//封装 AuthenticationUsernamePasswordAuthenticationToken authenticationToken = new UsernamePasswordAuthenticationToken(username, password);//认证用户Authentication authenticate;try {authenticate = authenticationManager.authenticate(authenticationToken);} catch (Exception e) {log.error("Authentication failed: {}", e.getMessage());throw new CustomException(ResultCodeEnum.LOGIN_AUTH_ERROR);}//获取认证用户信息UserDetailsInfo userDetailsInfo = (UserDetailsInfo) authenticate.getPrincipal();boolean matches = passwordEncoder.matches(password, userDetailsInfo.getPassword());if (!matches) {throw new CustomException(ResultCodeEnum.LOGIN_PWD_ERROR);}//认证通过，生成jwtTokenVo tokenVo=new TokenVo();String token = jwtTokenUtil.generateToken(userDetailsInfo);tokenVo.setToken(token);tokenVo.setExpireTime(jwtTokenUtil.expiration);redisCache.setCacheObject(RedisConst.REDIS_TOKEN_PREFIX+token, userDetailsInfo, jwtTokenUtil.expiration, TimeUnit.SECONDS);return tokenVo;}

4.灵魂一问

passwordEncoder.matches(“A”, “B”); ,如果返还是True,这个B其实就是A通过passwordEncoder.encode();加密的对吧？

不完全正确。在Spring Security中，passwordEncoder.matches(“A”, “B”)的返回值为true表示密码匹配成功，即明文密码"A"与加密后的密码"B"是匹配的。

passwordEncoder.encode(“A”)会将明文密码"A"进行加密，生成一个新的加密密码。每次调用passwordEncoder.encode(“A”)都会生成不同的加密密码，即使输入的明文密码相同。

因此，如果passwordEncoder.matches(“A”, “B”)返回true，并不意味着"B"是由"A"通过passwordEncoder.encode()加密得到的。它只表示明文密码"A"与加密密码"B"是匹配的，即密码验证成功。