Spring Security - 用户授权

news2024/11/17 4:40:07

1.用户授权介绍：

在SpringSecurity中，会使用默认的FilterSecurityInterceptor来进行权限校验。在FilterSecurityInterceptor中会从SecurityContextHolder获取其中的Authentication，然后获取其中的权限信息。判断当前用户是否拥有访问当前资源所需的权限。

1.1SpringSecurity中的Authentication类

public interface Authentication extends Principal, Serializable {
    //权限数据列表
    Collection<? extends GrantedAuthority> getAuthorities();

    Object getCredentials();

    Object getDetails();

    Object getPrincipal();

    boolean isAuthenticated();

    void setAuthenticated(boolean var1) throws IllegalArgumentException;
}

1.2 loadUserByUsername方法

1.3 在TokenAuthenticationFilter中怎么获取权限数据呢？

方法：登录时我们把权限数据保存到redis中（用户名为key，权限数据为value即可），这样通过token获取用户名即可拿到权限数据，这样就可构成出完整的Authentication对象。

2.spring-security模块配置redis

2.1 导入依赖

<dependency>
    <groupId>org.springframework.boot</groupId>

    <artifactId>spring-boot-starter-data-redis</artifactId>

</dependency>

3.实现SpringSecurity中的用户授权

3.1 修改TokenLoginFilter登录成功方法

登录成功我们将权限数据保单到reids



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.HashMap;
import java.util.Map;

public class TokenLoginFilter extends UsernamePasswordAuthenticationFilter {

    private RedisTemplate redisTemplate;


    public TokenLoginFilter(AuthenticationManager authenticationManager,
                            RedisTemplate redisTemplate) {
        this.setAuthenticationManager(authenticationManager);
        this.setPostOnly(false);
        //指定登录接口及提交方式，可以指定任意路径
        this.setRequiresAuthenticationRequestMatcher(new AntPathRequestMatcher("/admin/system/index/login","POST"));
        this.redisTemplate = redisTemplate;
    }

    /**
     * 登录认证
     * @param req
     * @param res
     * @return
     * @throws AuthenticationException
     */
    @Override
    public Authentication attemptAuthentication(HttpServletRequest req, HttpServletResponse res)
            throws AuthenticationException {
        try {
            LoginVo loginVo = new ObjectMapper().readValue(req.getInputStream(), LoginVo.class);

            Authentication authenticationToken = new UsernamePasswordAuthenticationToken(loginVo.getUsername(), loginVo.getPassword());
            return this.getAuthenticationManager().authenticate(authenticationToken);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }

    }

    /**
     * 登录成功
     * @param request
     * @param response
     * @param chain
     * @param auth
     * @throws IOException
     * @throws ServletException
     */
    @Override
    protected void successfulAuthentication(HttpServletRequest request,
                                            HttpServletResponse response,
                                            FilterChain chain,
                                            Authentication auth) throws IOException, ServletException {
        CustomUser customUser = (CustomUser) auth.getPrincipal();
        String token = JwtHelper.createToken(customUser.getSysUser().getId(), customUser.getSysUser().getUsername());

        //获取当前用户数据权限，放到Redis里面  key:username,value:权限数据
        redisTemplate.opsForValue().set(customUser.getUsername(), JSON.toJSONString(customUser.getAuthorities()));

        Map<String, Object> map = new HashMap<>();
        map.put("token", token);
        ResponseUtil.out(response, Result.ok(map));

    }

    /**
     * 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 {

        if(e.getCause() instanceof RuntimeException) {
            ResponseUtil.out(response, Result.build(null, 204, e.getMessage()));
        } else {
            ResponseUtil.out(response, Result.build(null, ResultCodeEnum.LOGIN_MOBLE_ERROR));
        }
    }


}

3.2 修改配置类

步骤：

修改WebSecurityConfig类

配置类添加注解：

开启基于方法的安全认证机制，也就是说在web层的controller启用注解机制的安全确认

@EnableGlobalMethodSecurity(prePostEnabled = true)

注入bean,redis的RedisTemplate

@Autowired
private RedisTemplate redisTemplate;

完整代码如下：

@Configuration
@EnableWebSecurity //@EnableWebSecurity是开启SpringSecurity的默认行为
@EnableGlobalMethodSecurity(prePostEnabled = true)//开启注解功能，默认禁用注解
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
    @Autowired
    private RedisTemplate redisTemplate;

    @Autowired
    private UserDetailsService userDetailsService;//自定义的UserDetailsService

    @Autowired
    private CustomMd5PasswordEncoder customMd5PasswordEncoder; //自定义的密码加密器


    @Bean // 将AuthenticationManager注册为Bean，方便在其他地方使用
    @Override
    protected AuthenticationManager authenticationManager() throws Exception {// 重写authenticationManager方法，返回AuthenticationManagerBuilder
        return super.authenticationManager();
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        // 这是配置的关键，决定哪些接口开启防护，哪些接口绕过防护
        http
                //关闭csrf跨站请求伪造
                .csrf().disable()
                // 开启跨域以便前端调用接口
                .cors().and()
                .authorizeRequests()
                // 指定某些接口不需要通过验证即可访问。登陆接口肯定是不需要认证的
                .antMatchers("/admin/system/index/login").permitAll()
                // 这里意思是其它所有接口需要认证才能访问
                .anyRequest().authenticated()
                .and()
                //TokenAuthenticationFilter放到UsernamePasswordAuthenticationFilter的前面，这样做就是为了除了登录的时候去查询数据库外，其他时候都用token进行认证。
                .addFilterBefore(new TokenAuthenticationFilter(redisTemplate), UsernamePasswordAuthenticationFilter.class)
                .addFilter(new TokenLoginFilter(authenticationManager(),redisTemplate));

        //禁用session
        http.sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS);
    }

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        // 指定UserDetailService和加密器
        auth.userDetailsService(userDetailsService)
                .passwordEncoder(customMd5PasswordEncoder);
    }

    /**
     * 配置哪些请求不拦截
     * 排除swagger相关请求
     * @param web
     * @throws Exception
     */
    @Override
    public void configure(WebSecurity web) throws Exception {
        web.ignoring().antMatchers("/favicon.ico","/swagger-resources/**", "/webjars/**", "/v2/**", "/swagger-ui.html/**", "/doc.html");
    }
}