package com.genersoft.iot.vmp.conf.security;
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import com.genersoft.iot.vmp.conf.security.dto.JwtUser;
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import com.genersoft.iot.vmp.service.IUserService;
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import com.genersoft.iot.vmp.storager.dao.dto.User;
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import org.jose4j.jwk.RsaJsonWebKey;
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import org.jose4j.jwk.RsaJwkGenerator;
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import org.jose4j.jws.AlgorithmIdentifiers;
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import org.jose4j.jws.JsonWebSignature;
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import org.jose4j.jwt.JwtClaims;
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import org.jose4j.jwt.NumericDate;
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import org.jose4j.jwt.consumer.ErrorCodes;
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import org.jose4j.jwt.consumer.InvalidJwtException;
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import org.jose4j.jwt.consumer.JwtConsumer;
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import org.jose4j.jwt.consumer.JwtConsumerBuilder;
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import org.jose4j.lang.JoseException;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.beans.factory.InitializingBean;
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import org.springframework.stereotype.Component;
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import javax.annotation.Resource;
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import java.time.LocalDateTime;
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import java.time.ZoneOffset;
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@Component
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public class JwtUtils implements InitializingBean {
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private static final Logger logger = LoggerFactory.getLogger(JwtUtils.class);
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public static final String HEADER = "access-token";
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private static final String AUDIENCE = "Audience";
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private static final String keyId = "3e79646c4dbc408383a9eed09f2b85ae";
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/**
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* token过期时间(分钟)
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*/
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public static final long expirationTime = 30 * 24 * 60;
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private static RsaJsonWebKey rsaJsonWebKey;
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private static IUserService userService;
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@Resource
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public void setUserService(IUserService userService) {
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JwtUtils.userService = userService;
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}
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@Override
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public void afterPropertiesSet() {
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try {
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rsaJsonWebKey = generateRsaJsonWebKey();
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} catch (JoseException e) {
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logger.error("生成RsaJsonWebKey报错。", e);
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}
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}
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/**
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* 创建密钥对
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* @throws JoseException JoseException
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*/
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private RsaJsonWebKey generateRsaJsonWebKey() throws JoseException {
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// 生成一个RSA密钥对，该密钥对将用于JWT的签名和验证，包装在JWK中
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RsaJsonWebKey rsaJsonWebKey = RsaJwkGenerator.generateJwk(2048);
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// 给JWK一个密钥ID
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rsaJsonWebKey.setKeyId(keyId);
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return rsaJsonWebKey;
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}
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public static String createToken(String username) {
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try {
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/*
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* “iss” (issuer) 发行人
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* “sub” (subject) 主题
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* “aud” (audience) 接收方 用户
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* “exp” (expiration time) 到期时间
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* “nbf” (not before) 在此之前不可用
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* “iat” (issued at) jwt的签发时间
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*/
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JwtClaims claims = new JwtClaims();
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claims.setGeneratedJwtId();
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claims.setIssuedAtToNow();
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// 令牌将过期的时间 分钟
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claims.setExpirationTimeMinutesInTheFuture(expirationTime);
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claims.setNotBeforeMinutesInThePast(0);
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claims.setSubject("login");
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claims.setAudience(AUDIENCE);
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//添加自定义参数,必须是字符串类型
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claims.setClaim("userName", username);
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//jws
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JsonWebSignature jws = new JsonWebSignature();
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//签名算法RS256
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jws.setAlgorithmHeaderValue(AlgorithmIdentifiers.RSA_USING_SHA256);
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jws.setKeyIdHeaderValue(keyId);
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jws.setPayload(claims.toJson());
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jws.setKey(rsaJsonWebKey.getPrivateKey());
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//get token
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return jws.getCompactSerialization();
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} catch (JoseException e) {
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logger.error("[Token生成失败]： {}", e.getMessage());
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}
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return null;
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}
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public static String getHeader() {
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return HEADER;
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}
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public static JwtUser verifyToken(String token) {
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JwtUser jwtUser = new JwtUser();
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try {
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JwtConsumer consumer = new JwtConsumerBuilder()
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.setRequireExpirationTime()
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.setMaxFutureValidityInMinutes(5256000)
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.setAllowedClockSkewInSeconds(30)
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.setRequireSubject()
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//.setExpectedIssuer("")
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.setExpectedAudience(AUDIENCE)
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.setVerificationKey(rsaJsonWebKey.getPublicKey())
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.build();
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JwtClaims claims = consumer.processToClaims(token);
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NumericDate expirationTime = claims.getExpirationTime();
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// 判断是否即将过期, 默认剩余时间小于5分钟未即将过期
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// 剩余时间 （秒）
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long timeRemaining = LocalDateTime.now().toEpochSecond(ZoneOffset.ofHours(8)) - expirationTime.getValue();
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if (timeRemaining < 5 * 60) {
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jwtUser.setStatus(JwtUser.TokenStatus.EXPIRING_SOON);
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} else {
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jwtUser.setStatus(JwtUser.TokenStatus.NORMAL);
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}
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String username = (String) claims.getClaimValue("userName");
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User user = userService.getUserByUsername(username);
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jwtUser.setUserName(username);
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jwtUser.setPassword(user.getPassword());
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jwtUser.setRoleId(user.getRole().getId());
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jwtUser.setUserId(user.getId());
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return jwtUser;
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} catch (InvalidJwtException e) {
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if (e.hasErrorCode(ErrorCodes.EXPIRED)) {
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jwtUser.setStatus(JwtUser.TokenStatus.EXPIRED);
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} else {
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jwtUser.setStatus(JwtUser.TokenStatus.EXCEPTION);
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}
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return jwtUser;
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} catch (Exception e) {
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logger.error("[Token解析失败]： {}", e.getMessage());
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jwtUser.setStatus(JwtUser.TokenStatus.EXPIRED);
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return jwtUser;
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}
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}
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}
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