思维导图如下
万字长文,SpringSecurity插图

RBAC权限分析

RBAC 全称为基于角色的权限控制,本段将会从什么是RBAC,模型分类,什么是权限,用户组的使用,实例分析等几个方面阐述RBAC

思维导图

绘制思维导图如下
万字长文,SpringSecurity插图(1)

什么是RBAC

RBAC 全称为用户角色权限控制,通过角色关联用户,角色关联权限,这种方式,间阶的赋予用户的权限,如下图所示
万字长文,SpringSecurity插图(2)

对于通常的系统而言,存在多个用户具有相同的权限,在分配的时候,要为指定的用户分配相关的权限,修改的时候也要依次的对这几个用户的权限进行修改,有了角色这个权限,在修改权限的时候,只需要对角色进行修改,就可以实现相关的权限的修改。这样做增加了效率,减少了权限漏洞的发生。

模型分类

对于RBAC模型来说,分为以下几个模型 分别是RBAC0,RBAC1,RBAC2,RBAC3,这四个模型,这段将会依次介绍这四个模型,其中最常用的模型有RBAC0.

RBAC0

RBAC0是最简单的RBAC模型,这里面包含了两种。

用户和角色是多对一的关系,即一个用户只充当一种角色,一个角色可以有多个角色的担当。
用户和角色是多对多的关系,即,一个用户可以同时充当多个角色,一个角色可以有多个用户。
此系统功能单一,人员较少,这里举个栗子,张三既是行政,也负责财务,此时张三就有俩个权限,分别是行政权限,和财务权限两个部分。

RBAC1

相对于RBAC0模型来说,增加了子角色,引入了继承的概念。
万字长文,SpringSecurity插图(3)

RBAC2 模型

这里RBAC2模型,在RBAC0模型的基础上,增加了一些功能,以及限制

角色互斥

即,同一个用户不能拥有两个互斥的角色,举个例子,在财务系统中,一个用户不能拥有会计员和审计这两种角色。

基数约束

即,用一个角色,所拥有的成员是固定的,例如对于CEO这种角色,同一个角色,也只能有一个用户。

先决条件

即,对于该角色来说,如果想要获得更高的角色,需要先获取低一级别的角色。举个栗子,对于副总经理和经理这两个权限来说,需要先有副总经理权限,才能拥有经理权限,其中副总经理权限是经理权限的先决条件。

运行时互斥

即,一个用户可以拥有两个角色,但是这俩个角色不能同时使用,需要切换角色才能进入另外一个角色。举个栗子,对于总经理和专员这两个角色,系统只能在一段时间,拥有其一个角色,不能同时对这两种角色进行操作。

RBAC3模型

即,RBAC1,RBAC2,两者模型全部累计,称为统一模型。
万字长文,SpringSecurity插图(4)

什么是权限

权限是资源的集合,这里的资源指的是软件中的所有的内容,即,对页面的操作权限,对页面的访问权限,对数据的增删查改的权限。 举个栗子。 对于下图中的系统而言,
万字长文,SpringSecurity插图(5)

拥有,计划管理,客户管理,合同管理,出入库通知单管理,粮食安全追溯,粮食统计查询,设备管理这几个页面,对这几个页面的访问,以及是否能够访问到菜单,都属于权限。

用户组的使用

对于用户组来说,是把众多的用户划分为一组,进行批量授予角色,即,批量授予权限。 举个栗子,对于部门来说,一个部门拥有一万多个员工,这些员工都拥有相同的角色,如果没有用户组,可能需要一个个的授予相关的角色,在拥有了用户组以后,只需要,把这些用户全部划分为一组,然后对该组设置授予角色,就等同于对这些用户授予角色。

优点: 减少工作量,便于理解,增加多级管理,等。

SpringSecurity 简单使用

首先添加依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-security</artifactId>
</dependency>

然后添加相关的访问接口

package com.example.demo.web;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/test")
public class Test {
    @RequestMapping("/test")
    public String test(){
        return "test";
    }
}

最后启动项目,在日志中查看相关的密码

万字长文,SpringSecurity插图(6)

访问接口,可以看到相关的登录界面

万字长文,SpringSecurity插图(7)

输入用户名和相关的密码

用户名: user
密码 984cccf2-ba82-468e-a404-7d32123d0f9c

万字长文,SpringSecurity插图(8)

登录成功

增加用户名和密码

在配置文件中,书写相关的登录和密码

spring:
  security:
    user:
      name: ming
      password: 123456
      roles: admin

 ```
在登录页面,输入用户名和密码,即可正常登录

## 基于内存的认证
需要自定义类继承 WebSecurityConfigurerAdapter 代码如下

package com.example.demo.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.crypto.password.NoOpPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;

@Configuration
public class MyWebSecurityConfig extends WebSecurityConfigurerAdapter {
@Bean
PasswordEncoder passwordEncoder(){
return NoOpPasswordEncoder.getInstance();
}

@Override
protected void configure(AuthenticationManagerBuilder auth) throws Exception {
    auth.inMemoryAuthentication()
            .withUser("admin").password("123").roles("admin");
}

}

即,配置的用户名为admin,密码为123,角色为admin

## HttpSecurity
这里对一些方法进行拦截

package com.ming.demo.interceptor;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpMethod;
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.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.authentication.rememberme.TokenBasedRememberMeServices;

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
//基于内存的用户存储
@Override
public void configure(AuthenticationManagerBuilder auth) throws Exception {
auth.inMemoryAuthentication()
.withUser(“itguang”).password(“123456”).roles(“USER”).and()
.withUser(“admin”).password(“{noop}” + “123456”).roles(“ADMIN”);
}

//请求拦截
@Override
protected void configure(HttpSecurity http) throws Exception {
    http.authorizeRequests()
            .anyRequest().permitAll()
            .and()
            .formLogin()
            .permitAll()
            .and()
            .logout()
            .permitAll();
}

}

即,这里完成了对所有的方法访问的拦截。


# SpringSecurity 集成JWT
这是一个小demo,目的,登录以后返回jwt生成的token

## 导入依赖
添加web依赖[![](https://www.iming.info/wp-content/uploads/2020/06/wp_editor_md_94f9c4a9052e96e4e28f7cd7f5a0774d.jpg)](https://www.iming.info/wp-content/uploads/2020/06/wp_editor_md_94f9c4a9052e96e4e28f7cd7f5a0774d.jpg)


导入JWT和Security依赖



io.jsonwebtoken
jjwt
0.9.1



org.springframework.boot
spring-boot-starter-security
2.3.1.RELEASE

## 创建一个JwtUser实现UserDetails
创建 一个相关的JavaBean

package com.example.demo;

import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;

import java.util.Collection;

public class JwtUser implements UserDetails {
private String username;
private String password;
private Integer state;
private Collection<? extends GrantedAuthority> authorities;
public JwtUser(){

}

public JwtUser(String username, String password, Integer state,  Collection<? extends GrantedAuthority> authorities){
    this.username = username;
    this.password = password;
    this.state = state;
    this.authorities = authorities;
}

@Override
public Collection<? extends GrantedAuthority> getAuthorities() {
    return authorities;
}

@Override
public String getPassword() {
    return this.password;
}

@Override
public String getUsername() {
    return this.username;
}

@Override
public boolean isAccountNonExpired() {
    return true;
}

@Override
public boolean isAccountNonLocked() {
    return true;
}

@Override
public boolean isCredentialsNonExpired() {
    return true;
}

@Override
public boolean isEnabled() {
    return true;
}

}

## 编写工具类生成令牌
编写工具类,用来生成token,以及刷新token,以及验证token

package com.example.demo;

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import org.springframework.security.core.userdetails.UserDetails;

import java.io.Serializable;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

public class JwtTokenUtil implements Serializable {
private String secret;
private Long expiration;
private String header;

private String generateToken(Map<String, Object> claims) {
    Date expirationDate = new Date(System.currentTimeMillis() + expiration);
    return Jwts.builder().setClaims(claims).setExpiration(expirationDate).signWith(SignatureAlgorithm.HS512, secret).compact();
}

private Claims getClaimsFromToken(String token) {
    Claims claims;
    try {
        claims = Jwts.parser().setSigningKey(secret).parseClaimsJws(token).getBody();

    } catch (Exception e) {
        claims = null;
    }
    return claims;
}

public String generateToken(UserDetails userDetails) {
    Map<String, Object> claims = new HashMap<>(2);
    claims.put("sub", userDetails.getUsername());
    claims.put("created", new Date());
    return generateToken(claims);

}

public String getUsernameFromToken(String token) {
    String username;
    try {
        Claims claims = getClaimsFromToken(token);
        username = claims.getSubject();

    } catch (Exception e) {
        username = null;

    }
    return username;

}

public Boolean isTokenExpired(String token) {
    try {
        Claims claims = getClaimsFromToken(token);
        Date expiration = claims.getExpiration();
        return expiration.before(new Date());
    } catch (Exception e) {
        return false;
    }
}

public String refreshToken(String token) {
    String refreshedToken;
    try {
        Claims claims = getClaimsFromToken(token);
        claims.put("created", new Date());
        refreshedToken = generateToken(claims);

    } catch (Exception e) {
        refreshedToken = null;

    }
    return refreshedToken;
}

public Boolean validateToken(String token, UserDetails userDetails) {
    JwtUser user = (JwtUser) userDetails;
    String username = getUsernameFromToken(token);
    return (username.equals(user.getUsername()) && !isTokenExpired(token));

}

}

## 编写拦截器
编写Filter 用来检测JWT

package com.example.demo;

import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.web.authentication.WebAuthenticationDetailsSource;
import org.springframework.stereotype.Component;
import org.springframework.web.filter.OncePerRequestFilter;

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

@Component
public class JwtAuthenticationTokenFilter extends OncePerRequestFilter {
@Autowired
private UserDetailsService userDetailsService;
@Autowired
private JwtTokenUtil jwtTokenUtil;

@Override
protected void doFilterInternal(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, FilterChain filterChain) throws ServletException, IOException {
    String authHeader = httpServletRequest.getHeader(jwtTokenUtil.getHeader());
    if (authHeader != null && StringUtils.isNotEmpty(authHeader)) {
        String username = jwtTokenUtil.getUsernameFromToken(authHeader);
        if (username != null && SecurityContextHolder.getContext().getAuthentication() == null) {
            UserDetails userDetails = this.userDetailsService.loadUserByUsername(username);
            if (jwtTokenUtil.validateToken(authHeader, userDetails)) {
                UsernamePasswordAuthenticationToken authentication  =
                new UsernamePasswordAuthenticationToken(userDetails,null,userDetails.getAuthorities());
                authentication.setDetails(new WebAuthenticationDetailsSource().buildDetails(httpServletRequest));
                SecurityContextHolder.getContext().setAuthentication(authentication);

            }
        }
    }
    filterChain.doFilter(httpServletRequest, httpServletResponse);

}

}

## 编写userDetailsService的实现类
在上方代码中,编写userDetailsService,类,实现其验证过程

package com.example.demo;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.User;
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 javax.management.relation.Role;
import java.util.List;

@Service
public class JwtUserDetailsServiceImpl implements UserDetailsService {
@Autowired
private UserMapper userMapper;

@Override
public UserDetails loadUserByUsername(String s) throws UsernameNotFoundException {
    User user = userMapper.selectByUserName(s);
    if (user == null) {
        throw new UsernameNotFoundException(String.format("'%s'.这个用户不存在", s));

    }
    List<SimpleGrantedAuthority> collect = user.getRoles().stream().map(Role::getRolename).map(SimpleGrantedAuthority::new).collect(Collectors.toList());
    return new JwtUser(user.getUsername(), user.getPassword(), user.getState(), collect);

}

}

## 编写登录

编写登录业务的实现类 其login方法会返回一个JWTUtils 的token


@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserMapper userMapper;

@Autowired
private AuthenticationManager authenticationManager;

@Autowired
private UserDetailsService userDetailsService;

@Autowired
private JwtTokenUtil jwtTokenUtil;

public User findByUsername(String username) {
    User user = userMapper.selectByUserName(username);
    return user;

}

public RetResult login(String username, String password) throws AuthenticationException {
    UsernamePasswordAuthenticationToken upToken = new UsernamePasswordAuthenticationToken(username, password);
    final Authentication authentication = authenticationManager.authenticate(upToken);
    SecurityContextHolder.getContext().setAuthentication(authentication);
    UserDetails userDetails = userDetailsService.loadUserByUsername(username);
    return new RetResult(RetCode.SUCCESS.getCode(),jwtTokenUtil.generateToken(userDetails));

}

}

## 最后配置Config

@EnableGlobalMethodSecurity(prePostEnabled = true)
@EnableWebSecurity
public class WebSecurity extends WebSecurityConfigurerAdapter {
@Autowired
private UserDetailsService userDetailsService;
@Autowired
private JwtAuthenticationTokenFilter jwtAuthenticationTokenFilter;

@Autowired
public void configureAuthentication(AuthenticationManagerBuilder authenticationManagerBuilder) throws Exception {
    authenticationManagerBuilder.userDetailsService(this.userDetailsService).passwordEncoder(passwordEncoder());

}

@Bean(name = BeanIds.AUTHENTICATION_MANAGER)

@Override
public AuthenticationManager authenticationManagerBean() throws Exception {
    return super.authenticationManagerBean();
}

@Bean
public PasswordEncoder passwordEncoder() {
    return new BCryptPasswordEncoder();

}

@Override
protected void configure(HttpSecurity http) throws Exception {
    http.csrf().disable().sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS)
            .and().authorizeRequests()
            .antMatchers(HttpMethod.OPTIONS, "/**").permitAll()
            .antMatchers("/auth/**").permitAll()
            .anyRequest().authenticated()
            .and().headers().cacheControl();


    http.addFilterBefore(jwtAuthenticationTokenFilter, UsernamePasswordAuthenticationFilter.class);

    ExpressionUrlAuthorizationConfigurer<HttpSecurity>.ExpressionInterceptUrlRegistry registry = http.authorizeRequests();

    registry.requestMatchers(CorsUtils::isPreFlightRequest).permitAll();

}

@Bean
public CorsFilter corsFilter() {
    final UrlBasedCorsConfigurationSource urlBasedCorsConfigurationSource = new UrlBasedCorsConfigurationSource();
    final CorsConfiguration cors = new CorsConfiguration();
    cors.setAllowCredentials(true);
    cors.addAllowedOrigin("*");
    cors.addAllowedHeader("*");
    cors.addAllowedMethod("*");
    urlBasedCorsConfigurationSource.registerCorsConfiguration("/**", cors);
    return new CorsFilter(urlBasedCorsConfigurationSource);

}

}

## 运行,返回token
运行,返回结果为token[![](https://www.iming.info/wp-content/uploads/2020/06/wp_editor_md_ec49f8d680cf76177fa79baa2f561e5b.jpg)](https://www.iming.info/wp-content/uploads/2020/06/wp_editor_md_ec49f8d680cf76177fa79baa2f561e5b.jpg)


# SpringSecurity JSON登录
这里配置SpringSecurity之JSON登录

这里需要重写UsernamePasswordAnthenticationFilter类,以及配置SpringSecurity

## 重写UsernamePasswordAnthenticationFilter

public class CustomAuthenticationFilter extends UsernamePasswordAuthenticationFilter {

@Override
public Authentication attemptAuthentication(HttpServletRequest request, HttpServletResponse response) throws AuthenticationException {

    //attempt Authentication when Content-Type is json
    if(request.getContentType().equals(MediaType.APPLICATION_JSON_UTF8_VALUE)
            ||request.getContentType().equals(MediaType.APPLICATION_JSON_VALUE)){

        //use jackson to deserialize json
        ObjectMapper mapper = new ObjectMapper();
        UsernamePasswordAuthenticationToken authRequest = null;
        try (InputStream is = request.getInputStream()){
            AuthenticationBean authenticationBean = mapper.readValue(is,AuthenticationBean.class);
            authRequest = new UsernamePasswordAuthenticationToken(
                    authenticationBean.getUsername(), authenticationBean.getPassword());
        }catch (IOException e) {
            e.printStackTrace();
            authRequest = new UsernamePasswordAuthenticationToken(
                    "", "");
        }finally {
            setDetails(request, authRequest);
            return this.getAuthenticationManager().authenticate(authRequest);
        }
    }

    //transmit it to UsernamePasswordAuthenticationFilter
    else {
        return super.attemptAuthentication(request, response);
    }
}

}

## 配置SecurityConfig

@Override
protected void configure(HttpSecurity http) throws Exception {
http
.cors().and()
.antMatcher(“/“).authorizeRequests()
.antMatchers(“/”, “/login
“).permitAll()
.anyRequest().authenticated()
//这里必须要写formLogin(),不然原有的UsernamePasswordAuthenticationFilter不会出现,也就无法配置我们重新的UsernamePasswordAuthenticationFilter
.and().formLogin().loginPage(“/”)
.and().csrf().disable();

//用重写的Filter替换掉原有的UsernamePasswordAuthenticationFilter
http.addFilterAt(customAuthenticationFilter(),
UsernamePasswordAuthenticationFilter.class);

}

//注册自定义的UsernamePasswordAuthenticationFilter
@Bean
CustomAuthenticationFilter customAuthenticationFilter() throws Exception {
CustomAuthenticationFilter filter = new CustomAuthenticationFilter();
filter.setAuthenticationSuccessHandler(new SuccessHandler());
filter.setAuthenticationFailureHandler(new FailureHandler());
filter.setFilterProcessesUrl(“/login/self”);

//这句很关键,重用WebSecurityConfigurerAdapter配置的AuthenticationManager,不然要自己组装AuthenticationManager
filter.setAuthenticationManager(authenticationManagerBean());
return filter;

}

这样就完成使用json登录SpringSecurity

# Spring Security 密码加密方式
需要在Config 类中配置如下内容

/**
* 密码加密
*/
@Bean
public BCryptPasswordEncoder passwordEncoder(){
return new BCryptPasswordEncoder();
}

即,使用此方法,对密码进行加密, 在业务层的时候,使用此加密的方法

@Service
@Transactional
public class UserServiceImpl implements UserService {

@Resource
private UserRepository userRepository;

@Resource
private BCryptPasswordEncoder bCryptPasswordEncoder;  //注入bcryct加密
@Override
public User add(User user) {
    user.setPassword(bCryptPasswordEncoder.encode(user.getPassword())); //对密码进行加密
    User user2 = userRepository.save(user);
    return user2;
}
@Override
public ResultInfo login(User user) {
    ResultInfo resultInfo=new ResultInfo();
    User user2 = userRepository.findByName(user.getName());  
    if (user2==null) {
        resultInfo.setCode("-1");
        resultInfo.setMessage("用户名不存在");
        return resultInfo;
    }

    //判断密码是否正确
    if (!bCryptPasswordEncoder.matches(user.getPassword(),user2.getPassword())) {
        resultInfo.setCode("-1");
        resultInfo.setMessage("密码不正确");
        return resultInfo;
    }
    resultInfo.setMessage("登录成功");
    return resultInfo;
} 

}

即,使用BCryptPasswordEncoder 对密码进行加密,保存数据库

# 使用数据库认证
这里使用数据库认证SpringSecurity

## 设计数据表
这里设计数据表

[![](https://www.iming.info/wp-content/uploads/2020/06/wp_editor_md_ff07d3ab8e10116f796fc8af57226d6b.jpg)](https://www.iming.info/wp-content/uploads/2020/06/wp_editor_md_ff07d3ab8e10116f796fc8af57226d6b.jpg)


## 着重配置SpringConfig

@Configurable
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
@Autowired
private UserService userService; // service 层注入

@Bean
PasswordEncoder passwordEncoder(){
    return new BCryptPasswordEncoder();
}

@Override
protected void configure(AuthenticationManagerBuilder auth) throws Exception {
    // 参数传入Service,进行验证
    auth.userDetailsService(userService);
}

@Override
protected void configure(HttpSecurity http) throws Exception {
    http.authorizeRequests()
            .antMatchers("/admin/**").hasRole("admin")
            .anyRequest().authenticated()
            .and()
            .formLogin()
            .loginProcessingUrl("/login").permitAll()
            .and()
            .csrf().disable();
}

}

“`

这里着重配置SpringConfig

小结

着重讲解了RBAC的权限配置,以及简单的使用SpringSecurity,以及使用SpringSecurity + JWT 完成前后端的分离,以及配置json登录,和密码加密方式,