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Security思想项目总结

2022-07-30 09:28:00 【Fairy要carry】

UserDetailService实现类完成认证思路，返回UserDetails

流程：

首先1.登录login会走这个认证的filter中的attemptAuthentication()方法，目的是获取用户名密码，2.核心是利用authenticationMangaer接口的authenticate()方法（参数里面用UsernamepasswordAuthenticationToken封装用户名密码）——>3.真实是调用provideManager实现的authenticate()方法，也就是AuthenticationManager的实现类——>4.方法里面调用了UserDetailService接口中的loadUserByUserName()方法——>5.这里的UserDetailService我们一般会在业务中实现这个接口重写loadUserByUserName()这个方法，目的是从数据库中得到用户信息和权限然后给UserDetails封装权限和用户信息，然后返回我们UserDetails里——>6.验证成功得到Authentication——>7.认证成功进入successfulAuthentication()方法，根据UserDetails生成用户名进而利用JWT生成唯一token，然后我们将用户名，用户权限存入redis，并且把token进行返回——>8.然后进入权限过滤器，调用doFilterInternal()方法，里面调用了getAuthentication()方法，目的是判断用户是否有权限——>9.getAuthentication（）方法，首先会得到请求头中的token，这里我们会利用前端拦截器将认证过滤器返回的token存入cookie然后放入header中，我们会通过token进行解析得到用户名username，然后从redis中取出对应username的权限，对权限遍历将其封装到SimpleGrantedAuthority()中，最后将权限用户名，token全部封装到UsernamePasswordAuthenticationToken中进行返回

认证过滤器

package com.atguigu.security.filter;


import com.atguigu.eduservice.R;
import com.atguigu.eduservice.ResponseUtil;
import com.atguigu.security.entity.SecurityUser;
import com.atguigu.security.entity.User;
import com.atguigu.security.security.TokenManager;

import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.security.web.util.matcher.AntPathRequestMatcher;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.ArrayList;

/**
 * <p>  认证过滤器
 * 登录过滤器，继承UsernamePasswordAuthenticationFilter，对用户名密码进行登录校验
 * </p>
 *
 * @author qy
 * @since 2019-11-08
 */
public class TokenLoginFilter extends UsernamePasswordAuthenticationFilter {

    private AuthenticationManager authenticationManager;
    private TokenManager tokenManager;
    private RedisTemplate redisTemplate;

    public TokenLoginFilter(AuthenticationManager authenticationManager, TokenManager tokenManager, RedisTemplate redisTemplate) {
        this.authenticationManager = authenticationManager;
        this.tokenManager = tokenManager;
        this.redisTemplate = redisTemplate;
        this.setPostOnly(false);
        this.setRequiresAuthenticationRequestMatcher(new AntPathRequestMatcher("/admin/acl/login","POST"));
    }

    /**
     * 获取用户名和密码
     * @param req
     * @param res
     * @return
     * @throws AuthenticationException
     */
    @Override
    public Authentication attemptAuthentication(HttpServletRequest req, HttpServletResponse res)
            throws AuthenticationException {
        try {
            User user = new ObjectMapper().readValue(req.getInputStream(), User.class);
            //authenticate认证用户
            return authenticationManager.authenticate(new UsernamePasswordAuthenticationToken(user.getUsername(), user.getPassword(), new ArrayList<>()));
        } catch (IOException e) {
            throw new RuntimeException(e);
        }

    }

    /**
     * 登录成功
     * @param req
     * @param res
     * @param chain
     * @param auth
     * @throws IOException
     * @throws ServletException
     */
    @Override
    protected void successfulAuthentication(HttpServletRequest req, HttpServletResponse res, FilterChain chain,
                                            Authentication auth) throws IOException, ServletException {
        SecurityUser user = (SecurityUser) auth.getPrincipal();
        //生成token字符串
        String token = tokenManager.createToken(user.getCurrentUserInfo().getUsername());
        //把用户名和权限信息传入redis中
        redisTemplate.opsForValue().set(user.getCurrentUserInfo().getUsername(), user.getPermissionValueList());

        //返回token
        ResponseUtil.out(res, R.ok().data("token", token));
    }

    /**
     * 登录失败
     * @param request
     * @param response
     * @param e
     * @throws IOException
     * @throws ServletException
     */
    @Override
    protected void unsuccessfulAuthentication(HttpServletRequest request, HttpServletResponse response,
                                              AuthenticationException e) throws IOException, ServletException {
        ResponseUtil.out(response, R.error());
    }
}

UserDetailService实现类完成认证思路，返回UserDetails

package com.atguigu.aclservice.service.impl;

import com.atguigu.aclservice.service.PermissionService;
import com.atguigu.aclservice.service.UserService;
import com.atguigu.eduservice.exceptionHandler.GuliException;
import com.atguigu.security.entity.SecurityUser;
import com.atguigu.security.entity.User;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Service;

import java.util.List;


/**
 * <p>
 * 自定义userDetailsService - 认证用户详情
 *   UserDetailsService是 security中的接口
 * </p>
 *
 * @author qy
 * @since 2019-11-08
 */
@Service("userDetailsService")
public class UserDetailsServiceImpl implements UserDetailsService {

    @Autowired
    private UserService userService;

    @Autowired
    private PermissionService permissionService;

    /***
     * 根据账号获取用户信息
     * @param username:
     * @return: org.springframework.security.core.userdetails.UserDetails
     */
    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        // 从数据库中取出用户信息
        com.atguigu.aclservice.entity.User user = userService.selectByUsername(username);

        // 判断用户是否存在
        if (null == user){
            throw new GuliException(20001,"用户名或密码错误");
            //throw new UsernameNotFoundException("用户名不存在！");
        }
        // 返回UserDetails实现类
        User curUser = new User();
        BeanUtils.copyProperties(user,curUser);

        //根据用户did得到用户权限
        List<String> authorities = permissionService.selectPermissionValueByUserId(user.getId());

        //将user封装到SecurityUser中（也就是UserDetails），并且封装用户权限
        SecurityUser securityUser = new SecurityUser(curUser);
        securityUser.setPermissionValueList(authorities);
        return securityUser;
    }

}

权限过滤器

package com.atguigu.security.filter;

//import com.atguigu.commonutils.R;
//import com.atguigu.commonutils.ResponseUtil;
//import com.atguigu.serurity.security.TokenManager;
import com.atguigu.eduservice.R;
import com.atguigu.eduservice.ResponseUtil;
import com.atguigu.security.security.TokenManager;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.web.authentication.www.BasicAuthenticationFilter;
import org.springframework.util.StringUtils;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

/**
 * <p>
 * 访问过滤器，授权过滤
 * </p>
 *
 * @author qy
 * @since 2019-11-08
 */
public class TokenAuthenticationFilter extends BasicAuthenticationFilter {
    private TokenManager tokenManager;
    private RedisTemplate redisTemplate;

    public TokenAuthenticationFilter(AuthenticationManager authManager, TokenManager tokenManager,RedisTemplate redisTemplate) {
        super(authManager);
        this.tokenManager = tokenManager;
        this.redisTemplate = redisTemplate;
    }

    @Override
    protected void doFilterInternal(HttpServletRequest req, HttpServletResponse res, FilterChain chain)
            throws IOException, ServletException {
        logger.info("================="+req.getRequestURI());
        if(req.getRequestURI().indexOf("admin") == -1) {
            chain.doFilter(req, res);
            return;
        }

        UsernamePasswordAuthenticationToken authentication = null;
        try {
            authentication = getAuthentication(req);
        } catch (Exception e) {
            ResponseUtil.out(res, R.error());
        }

        if (authentication != null) {
            SecurityContextHolder.getContext().setAuthentication(authentication);
        } else {
            ResponseUtil.out(res, R.error());
        }

        //TODO：问题代码
        chain.doFilter(req, res);
    }

    /**
     * 判断用户是否有权限
     * @param request
     * @return
     */
    private UsernamePasswordAuthenticationToken getAuthentication(HttpServletRequest request) {
        // token置于header里
        String token = request.getHeader("token");
        if (token != null && !"".equals(token.trim())) {
            String userName = tokenManager.getUserFromToken(token);

            List<String> permissionValueList = (List<String>) redisTemplate.opsForValue().get(userName);
            Collection<GrantedAuthority> authorities = new ArrayList<>();
            for(String permissionValue : permissionValueList) {
                if(StringUtils.isEmpty(permissionValue)) continue;
                SimpleGrantedAuthority authority = new SimpleGrantedAuthority(permissionValue);
                authorities.add(authority);
            }

            if (!StringUtils.isEmpty(userName)) {
                return new UsernamePasswordAuthenticationToken(userName, token, authorities);
            }
            return null;
        }
        return null;
    }
}

Security配置类

package com.atguigu.security.config;

import com.atguigu.security.filter.TokenAuthenticationFilter;
import com.atguigu.security.filter.TokenLoginFilter;
import com.atguigu.security.security.DefaultPasswordEncoder;
import com.atguigu.security.security.TokenLogoutHandler;
import com.atguigu.security.security.TokenManager;
import com.atguigu.security.security.UnauthorizedEntryPoint;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.builders.WebSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.core.userdetails.UserDetailsService;

/**
 * <p>
 * Security配置类，核心配置类
 * </p>
 *
 * @author qy
 * @since 2019-11-18
 */
@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class TokenWebSecurityConfig extends WebSecurityConfigurerAdapter {

    private UserDetailsService userDetailsService;//查询数据库
    private TokenManager tokenManager;//token生成
    private DefaultPasswordEncoder defaultPasswordEncoder;//密码处理
    private RedisTemplate redisTemplate;//操作redis

    @Autowired
    public TokenWebSecurityConfig(UserDetailsService userDetailsService, DefaultPasswordEncoder defaultPasswordEncoder,
                                  TokenManager tokenManager, RedisTemplate redisTemplate) {
        this.userDetailsService = userDetailsService;
        this.defaultPasswordEncoder = defaultPasswordEncoder;
        this.tokenManager = tokenManager;
        this.redisTemplate = redisTemplate;
    }

    /**
     * 配置设置，主要配置：退出地址
     * @param http
     * @throws Exception
     */
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.exceptionHandling()
                .authenticationEntryPoint(new UnauthorizedEntryPoint())
                .and().csrf().disable()
                .authorizeRequests()
                .anyRequest().authenticated()
                .and().logout().logoutUrl("/admin/acl/index/logout")
                .addLogoutHandler(new TokenLogoutHandler(tokenManager,redisTemplate)).and()
                .addFilter(new TokenLoginFilter(authenticationManager(), tokenManager, redisTemplate))
                .addFilter(new TokenAuthenticationFilter(authenticationManager(), tokenManager, redisTemplate)).httpBasic();
    }

    /**
     * 密码处理
     * @param auth
     * @throws Exception
     */
    @Override
    public void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService).passwordEncoder(defaultPasswordEncoder);
    }

    /**
     * 配置哪些请求不拦截
     * @param web /admin/acl/index
     * @throws Exception
     */
    @Override
    public void configure(WebSecurity web) throws Exception {
        web.ignoring().antMatchers("/api/**","**/api/**","admin/**","**/acl/**",
                "/swagger-resources/**", "/webjars/**", "/v2/**", "/swagger-ui.html/**"
               );
    }
}