Shiro&Jwt验证

此篇基于 SpringBoot 整合 Shiro & Jwt 进行鉴权 相关代码编写与解析

首先我们创建 JwtFilter 类 继承自 BasicHttpAuthenticationFilter

org.apache.shiro.web.filter.authc.BasicHttpAuthenticationFilter

此类是个过滤器，后期配置Shiro时会引用到

重写4个重要的方法 其执行顺序亦是如下

1. preHandle(..)  我理解为是前置处理
2. isAccessAllowed(..) 请求是否被允许
3. isLoginAttempt(..) 是否是尝试登陆，去查实[请求头]里是否包含[Authorization]
4. executeLogin(..) 执行登陆操作 其会调用getSubject(request, response).login(jwtToken)进行登陆验权

preHandle 方法

可以理解为前置处理，我们在这进行一些跨域的必要设置

HttpServletRequest httpServletRequest = (HttpServletRequest) request;
HttpServletResponse httpServletResponse = (HttpServletResponse) response;
httpServletResponse.setHeader("Access-control-Allow-Origin", httpServletRequest.getHeader("Origin"));
httpServletResponse.setHeader("Access-Control-Allow-Methods", "GET,POST,OPTIONS,PUT,DELETE");
httpServletResponse.setHeader("Access-Control-Allow-Headers", httpServletRequest.getHeader("Access-Control-Request-Headers"));
//跨域请求会发送两次请求首次为预检请求，其请求方法为 OPTIONS
if (httpServletRequest.getMethod().equals(RequestMethod.OPTIONS.name())) {
     httpServletResponse.setStatus(HttpStatus.OK.value());
     return false;
}
return super.preHandle(request, response);

isAccessAllowed 方法

其实这个方法我们会手动调用 isLoginAttempt 方法及 executeLogin 方法

isLoginAttempt判断用户是否想尝试登陆，判断依据为请求头中是否包含 Authorization 授权信息，也就是 Token 令牌

如果有则再执行executeLogin方法进行登陆验证操作，就是我们整合后的鉴权操作，因为用Token抛开了Session,此处就相当于是否存在Session的操作，存在则表明登陆成功，不存在则需要登陆操作，或者Session过期需要重新登陆是一个原理性质，此方法在这里是验证Jwt 中Token是否合法，不合法则返回401需要重新登陆

不合法的原因大致一这些

• Token不正确 可以是被篡改 不能解析
• Token过期
• Token已被注销（需自己去实现）

    @Override
    protected boolean isAccessAllowed(ServletRequest request, ServletResponse response, Object mappedValue) {
        if (this.isLoginAttempt(request, response)) {
            // 进行验证登陆JWT 可以trycatch下可以捕获Token过期异常等信息
            this.executeLogin(request, response);
        } else {
            // 没有携带Token
            HttpServletRequest httpRequest = (HttpServletRequest)request;
            String httpMethod = httpRequest.getMethod();
            String requestURI = httpRequest.getRequestURI();
            logger.info("当前请求 {} Authorization属性(Token)为空 请求类型 {}", requestURI, httpMethod);
            HttpServletResponse httpServletResponse = (HttpServletResponse) response;
                httpServletResponse.setStatus(HttpStatus.UNAUTHORIZED.value());
                httpServletResponse.setCharacterEncoding("UTF-8");
                httpServletResponse.setContentType("application/json; charset=utf-8");
                try (PrintWriter out = httpServletResponse.getWriter()) {
                    out.append("用户认证失败" + msg);
                } catch (IOException e) {
                    //logger.error("直接返回Response信息出现IOException异常", e);
                }
            return false;
        }
        return true;
    }

isLoginAttempt 方法 是否尝试登陆

    @Override
    protected boolean isLoginAttempt(ServletRequest request, ServletResponse response) {
        String token = this.getAuthzHeader(request);
        return token != null;
    }

executeLogin 方法

执行登陆操作 其实就是对 Token 进行验证操作，这里我们需要另外一个类去处理 Token 验证 （MyRealm 类的doGetAuthenticationInfo方法）

    @Override
    protected boolean executeLogin(ServletRequest request, ServletResponse response) {
        String token = this.getAuthzHeader(request);
        //这里需要自己实现对Token验证操作
        JwtToken jwtToken = new JwtToken(token);
        getSubject(request, response).login(jwtToken);//如果登陆失败会抛出异常(Token鉴权失败)
        return true;
    }

---

创建 JwtToken 类 继承自AuthenticationToken

org.apache.shiro.authc.AuthenticationToken

这里本来是存取用户名及密码的字段用来登陆，现在因为是Token不存在需要携带用户名 所以把字段都设置成Token

public class JwtToken implements AuthenticationToken {
    private static final long serialVersionUID = -634556778977L;
    private String token;
    public JwtToken(String token) {
        this.token = token;
    }
    @Override
    public Object getPrincipal() {
        return token;
    }
    @Override
    public Object getCredentials() {
        return token;
    }
}

---

JwtConfig类的创建

这个类用于创建 Token 及解码 Token 里的信息

@ConfigurationProperties(prefix = "config.jwt")
@Component
public class JwtConfig {
    private String secret;
    private long expire;
    private String header;
    /**
     * 生成token
     *
     * @param subject
     * @return
     */
    public String createToken(String subject) {
        Date nowDate = new Date();
        //过期时间 默认单位 （天）
        Date expireDate = new Date(nowDate.getTime() + expire * 1000 * 60 * 60 * 24);
        return Jwts.builder()
                .setHeaderParam("typ", "JWT")
                .setSubject(subject)
                .setIssuedAt(nowDate)
                .setExpiration(expireDate)
                .signWith(SignatureAlgorithm.HS512, secret)
                .compact();
    }
    /**
     * 获取token中注册信息
     *
     * @param token
     * @return
     */
    public Claims getTokenClaim(String token) {
        try {
            return Jwts.parser().setSigningKey(secret).parseClaimsJws(token).getBody();
        } catch (Exception e) {
            return null;
        }
    }
    /**
     * 获取token 解析信息
     * @param token
     * @return
     */
    public String getTokenInfo(String token){
        Claims claims=getTokenClaim(token);
        if(claims==null){
            throw new RuntimeException("Token 信息异常");
        }
        String tokenInfo=claims.getSubject();
        if(StringUtils.isBlank(tokenInfo)){
            throw new RuntimeException("Token 信息异常 解析值为空");
        }
        return tokenInfo;
    }
    /**
     * 验证token是否过期失效
     *
     * @param expirationTime
     * @return
     */
    public boolean isTokenExpired(Date expirationTime) {
        return expirationTime.before(new Date());
    }
    /**
     * 获取token失效时间
     *
     * @param token
     * @return
     */
    public Date getExpirationDateFromToken(String token) {
        return getTokenClaim(token).getExpiration();
    }
    /**
     * 获取用户名从token中
     */
    public String getUsernameFromToken(String token) {
        return getTokenClaim(token).getSubject();
    }
    /**
     * 获取jwt发布时间
     */
    public Date getIssuedAtDateFromToken(String token) {
        return getTokenClaim(token).getIssuedAt();
    }
    ...set get
}

配置文件信息

config.jwt.secret=123！@#
config.jwt.expire=15
config.jwt.header=Authorization

---

实现自己的Realm 创建MyRealm类 继承自AuthorizingRealm

import io.jsonwebtoken.Claims;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.SimpleAuthenticationInfo;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.springframework.stereotype.Component;
import javax.annotation.Resource;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;
/**
 * @author zy
 */
@Component
public class MyRealm extends AuthorizingRealm {
    private static Logger logger = LogManager.getLogger(MyRealm.class);
    /**
    *   这里需要实现自己的用户登陆验证信息及 数据权限相关的信息获取
    */
    @Resource
    private UserService userService;
    @Resource
    private JwtConfig jwtConfig;
    @Override
    public boolean supports(AuthenticationToken token) {
        return token instanceof JwtToken;
    }
    /**
     * 只有当需要检测用户权限的时候才会调用此方法，例如checkRole,checkPermission之类的
     */
    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) {
        logger.info("====================数据权限认证====================");
        String username = jwtConfig.getTokenInfo(principals.toString());
        UserInfo user = userService.getUserAndRole(username);
        SimpleAuthorizationInfo simpleAuthorizationInfo = new SimpleAuthorizationInfo();
        List<Role> roles = user.getRoles();
        if (roles.isEmpty()) {
            logger.warn("该用户 {} 没有角色,默认赋予user角色", username);
            Role r = new Role();
            r.setRole("user");
            roles.add(r);
        }
        /**
        *    这里是我自己实现的数据权限认证可做参考用
        */
        Set<String> permissionSet = new HashSet<>(roles.size() * 16);
        for (Role role : roles) {
            List<Permission> temList = role.getPermissions();
            if (temList == null || temList.isEmpty()) {
                logger.warn("该角色 {} 没有赋予相应权限信息", role.getRole());
                continue;
            }
            for (Permission tem : temList) {
                if (tem.getId().indexOf(":") > -1) {
                    permissionSet.add(tem.getId());
                }
            }
        }
        simpleAuthorizationInfo.setRoles(roles.stream().map(Role::getRole).collect(Collectors.toSet()));
        simpleAuthorizationInfo.setStringPermissions(permissionSet);
        return simpleAuthorizationInfo;
    }
    /**
     * 默认使用此方法进行用户名正确与否验证，错误抛出异常即可。
     */
    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken auth) {
        logger.info("====================Token认证====================");
        String token = auth.getCredentials().toString();
        Claims claims = jwtConfig.getTokenClaim(token);
        if (claims == null) {
            throw new AuthenticationException("解析Token异常");
        }
        if (jwtConfig.isTokenExpired(claims.getExpiration())) {
            throw new AuthenticationException("Token过期");
        }
        String username = claims.getSubject();
        if (username == null || username == "") {
            logger.error("Token中帐号为空");
            throw new AuthenticationException("Token中帐号为空");
        }
        UserInfo user = userService.getUserByName(username);
        if (user == null) {
            throw new AuthenticationException("该帐号不存在");
        }
        DataContextHolder.setCurrentUser(user);
        return new SimpleAuthenticationInfo(token, token, getName());
    }
}

---

配置Shiro 创建ShiroConfig类

LifecycleBeanPostProcessor这个类并不一定要手动创建，手动创建可能存在一些问题。我遇见的坑就在这里。至于原因希望大家不吝赐教

import org.apache.shiro.mgt.DefaultSessionStorageEvaluator;
import org.apache.shiro.mgt.DefaultSubjectDAO;
import org.apache.shiro.spring.security.interceptor.AuthorizationAttributeSourceAdvisor;
import org.apache.shiro.spring.web.ShiroFilterFactoryBean;
import org.apache.shiro.web.filter.authc.AnonymousFilter;
import org.apache.shiro.web.mgt.DefaultWebSecurityManager;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.core.RedisTemplate;
import javax.servlet.Filter;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
/**
 * @author zy
 */
@Configuration
public class ShiroConfig {
    @Bean("securityManager")
    public DefaultWebSecurityManager getManager(MyRealm myRealm) {
        DefaultWebSecurityManager manager = new DefaultWebSecurityManager();
        manager.setRealm(myRealm);
        // 关闭Shiro自带的session
        DefaultSubjectDAO subjectDAO = new DefaultSubjectDAO();
        DefaultSessionStorageEvaluator defaultSessionStorageEvaluator = new DefaultSessionStorageEvaluator();
        defaultSessionStorageEvaluator.setSessionStorageEnabled(false);
        subjectDAO.setSessionStorageEvaluator(defaultSessionStorageEvaluator);
        manager.setSubjectDAO(subjectDAO);
        // 设置自定义Cache缓存 根据项目情况而设置
        manager.setCacheManager(new CustomCacheManager());
        return manager;
    }
    /**
     * 添加自己的过滤器，自定义url规则
     */
    @Bean("shiroFilter")
    public ShiroFilterFactoryBean factory(DefaultWebSecurityManager securityManager, RedisTemplate<String, String> redisTemplate, JwtConfig jwtConfig) {
        ShiroFilterFactoryBean factoryBean = new ShiroFilterFactoryBean();
        //配置过滤器 对 『anon』不进行拦截
        Map<String, Filter> filterMap = new HashMap<>(3);
        filterMap.put("anon", new AnonymousFilter());
        filterMap.put("jwt", new JwtFilter(redisTemplate, jwtConfig));
        factoryBean.setFilters(filterMap);
        factoryBean.setSecurityManager(securityManager);
        factoryBean.setLoginUrl("/login");
        LinkedHashMap<String, String> filterChainDefinitionMap = new LinkedHashMap<>(16);
        // 配置不过滤
        filterChainDefinitionMap.put("/login", "anon");
        filterChainDefinitionMap.put("/testpage", "anon");
        filterChainDefinitionMap.put("/static/**", "anon");
        filterChainDefinitionMap.put("/login/**", "anon");
        filterChainDefinitionMap.put("/unauthorized/**", "anon");
        // swagger
        filterChainDefinitionMap.put("/swagger**/**", "anon");
        filterChainDefinitionMap.put("/v2/**", "anon");
        filterChainDefinitionMap.put("/webjars/**", "anon");
        filterChainDefinitionMap.put("/**", "jwt");
        factoryBean.setFilterChainDefinitionMap(filterChainDefinitionMap);
        return factoryBean;
    }
//    @Bean
//    public LifecycleBeanPostProcessor lifecycleBeanPostProcessor() {
//        return new LifecycleBeanPostProcessor();
//    }
    @Bean
    public AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor(DefaultWebSecurityManager securityManager) {
        AuthorizationAttributeSourceAdvisor advisor = new AuthorizationAttributeSourceAdvisor();
        advisor.setSecurityManager(securityManager);
        return advisor;
    }
}