大目老师,有个问题,我用密钥生成token之后,用hutool的Base64的decode可以直接解密token字符打印里面的信息,为什么会这样呢,都没有使用密钥呢
代码
package com.colt.usercenter.util;
import cn.hutool.core.codec.Base64;
import com.google.common.collect.Maps;
import io.jsonwebtoken.*;
import io.jsonwebtoken.security.Keys;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import javax.crypto.SecretKey;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
@Slf4j
@RequiredArgsConstructor
@SuppressWarnings(“WeakerAccess”)
@Component
public class JwtOperator {
/**
* 秘钥
* - 默认aaabbbcccdddeeefffggghhhiiijjjkkklllmmmnnnooopppqqqrrrsssttt
*/
@Value("KaTeX parse error: Expected 'EOF', got '有' at position 115: … /**
* 有̲效期,单位秒
* -…{expire-time-in-second:1209600}")
private Long expirationTimeInSecond;
/**
* 从token中获取claim
*
* @param token token
* @return claim
*/
public Claims getClaimsFromToken(String token) {
try {
return Jwts.parser()
.setSigningKey(this.secret.getBytes())
.parseClaimsJws(token)
.getBody();
} catch (ExpiredJwtException | UnsupportedJwtException | MalformedJwtException | IllegalArgumentException e) {
log.error("token解析错误", e);
throw new IllegalArgumentException("Token invalided.");
}
}
/**
* 获取token的过期时间
*
* @param token token
* @return 过期时间
*/
public Date getExpirationDateFromToken(String token) {
return getClaimsFromToken(token)
.getExpiration();
}
/**
* 判断token是否过期
*
* @param token token
* @return 已过期返回true,未过期返回false
*/
private Boolean isTokenExpired(String token) {
Date expiration = getExpirationDateFromToken(token);
return expiration.before(new Date());
}
/**
* 计算token的过期时间
*
* @return 过期时间
*/
public Date getExpirationTime() {
return new Date(System.currentTimeMillis() + this.expirationTimeInSecond * 1000);
}
/**
* 为指定用户生成token
*
* @param claims 用户信息
* @return token
*/
public String generateToken(Map<String, Object> claims) {
Date createdTime = new Date();
Date expirationTime = this.getExpirationTime();
byte[] keyBytes = secret.getBytes();
SecretKey key = Keys.hmacShaKeyFor(keyBytes);
return Jwts.builder()
.setClaims(claims)
.setIssuedAt(createdTime)
.setExpiration(expirationTime)
// 你也可以改用你喜欢的算法
// 支持的算法详见:https://github.com/jwtk/jjwt#features
.signWith(key, SignatureAlgorithm.HS256)
.compact();
}
/**
* 判断token是否非法
*
* @param token token
* @return 未过期返回true,否则返回false
*/
public Boolean validateToken(String token) {
return !isTokenExpired(token);
}
public static void main(String[] args) {
// 1. 初始化
JwtOperator jwtOperator = new JwtOperator();
jwtOperator.expirationTimeInSecond = 1209600L;
jwtOperator.secret = "aaabbbcccdddeeefffggghhhiiijjjkkklllmmmnnnooopppqqqrrrsssttt";
// 2.设置用户信息
HashMap<String, Object> objectObjectHashMap = Maps.newHashMap();
objectObjectHashMap.put("id", "1");
objectObjectHashMap.put("name", "撒旦");
// 测试1: 生成token
String token = jwtOperator.generateToken(objectObjectHashMap);
// 会生成类似该字符串的内容: eyJhbGciOiJIUzI1NiJ9.eyJpZCI6IjEiLCJpYXQiOjE1NjU1ODk4MTcsImV4cCI6MTU2Njc5OTQxN30.27_QgdtTg4SUgxidW6ALHFsZPgMtjCQ4ZYTRmZroKCQ
System.out.println(token);
byte[] decode = Base64.decode(token);
String s = new String(decode);
System.err.println("decode String:"+s);
}
}
就是课程代码里的jwt工具类
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