Spring Security 04 自定义认证

今天药忘吃喽~ 2024-03-23 16:10 47阅读 0赞

## 登录⽤户数据获取 ##

### SecurityContextHolder ###

Spring Security 会将登录⽤户数据保存在 Session 中。但是，为了使⽤⽅便, Spring Security 在此基础上还做了⼀些改进，其中最主要的⼀个变化就是线程绑定。当⽤户登录成功后,Spring Security 会将登录成功的⽤户信息保存到SecurityContextHolder 中。

SecurityContextHolder 中的数据保存默认是通过 ThreadLocal 来实现的，使⽤ ThreadLocal 创建的变量只能被当前线程访问，不能被其他线程访问和修改，也就是⽤户数据和请求线程绑定在⼀起。当登录请求处理完毕后， Spring Security 会将SecurityContextHolder 中的数据拿出来保存到 Session 中，同时将 SecurityContexHolder 中的数据清空。以后每当有请求到来时， Spring Security 就会先从 Session 中取出⽤户登录数据，保存到SecurityContextHolder 中，⽅便在该请求的后续处理过程中使⽤，同时在请求结束时将 SecurityContextHolder 中的数据拿出来保存到 Session 中，然后将SecurityContextHolder 中的数据清空。

实际上 SecurityContextHolder 中存储是 SecurityContext，在SecurityContext 中存储是 Authentication。

![c968ba653baf43088badd71d3563d730.png][]

这种设计是典型的策略设计模式:

public class SecurityContextHolder {
    
    	public static final String MODE_THREADLOCAL = "MODE_THREADLOCAL";
    
    	public static final String MODE_INHERITABLETHREADLOCAL = "MODE_INHERITABLETHREADLOCAL";
    
    	public static final String MODE_GLOBAL = "MODE_GLOBAL";
    
    	private static final String MODE_PRE_INITIALIZED = "MODE_PRE_INITIALIZED";
    
    	public static final String SYSTEM_PROPERTY = "spring.security.strategy";
    
    	private static String strategyName = System.getProperty(SYSTEM_PROPERTY);
    
    	private static SecurityContextHolderStrategy strategy;
    
    	private static int initializeCount = 0;
    
    	static {
    		initialize();
    	}
    
    	private static void initialize() {
    		initializeStrategy();
    		initializeCount++;
    	}
    
    	private static void initializeStrategy() {
    		if (MODE_PRE_INITIALIZED.equals(strategyName)) {
    			Assert.state(strategy != null, "When using " + MODE_PRE_INITIALIZED
    					+ ", setContextHolderStrategy must be called with the fully constructed strategy");
    			return;
    		}
    		if (!StringUtils.hasText(strategyName)) {
    			// Set default
    			strategyName = MODE_THREADLOCAL;
    		}
    		if (strategyName.equals(MODE_THREADLOCAL)) {
    			strategy = new ThreadLocalSecurityContextHolderStrategy();
    			return;
    		}
    		if (strategyName.equals(MODE_INHERITABLETHREADLOCAL)) {
    			strategy = new InheritableThreadLocalSecurityContextHolderStrategy();
    			return;
    		}
    		if (strategyName.equals(MODE_GLOBAL)) {
    			strategy = new GlobalSecurityContextHolderStrategy();
    			return;
    		}
    		// Try to load a custom strategy
    		try {
    			Class<?> clazz = Class.forName(strategyName);
    			Constructor<?> customStrategy = clazz.getConstructor();
    			strategy = (SecurityContextHolderStrategy) customStrategy.newInstance();
    		}
    		catch (Exception ex) {
    			ReflectionUtils.handleReflectionException(ex);
    		}
    	}
    
    	/**
    	 * Explicitly clears the context value from the current thread.
    	 */
    	public static void clearContext() {
    		strategy.clearContext();
    	}
    
    	/**
    	 * Obtain the current <code>SecurityContext</code>.
    	 * @return the security context (never <code>null</code>)
    	 */
    	public static SecurityContext getContext() {
    		return strategy.getContext();
    	}
    
    	/**
    	 * Primarily for troubleshooting purposes, this method shows how many times the class
    	 * has re-initialized its <code>SecurityContextHolderStrategy</code>.
    	 * @return the count (should be one unless you've called
    	 * {@link #setStrategyName(String)} or
    	 * {@link #setContextHolderStrategy(SecurityContextHolderStrategy)} to switch to an
    	 * alternate strategy).
    	 */
    	public static int getInitializeCount() {
    		return initializeCount;
    	}
    
    	/**
    	 * Associates a new <code>SecurityContext</code> with the current thread of execution.
    	 * @param context the new <code>SecurityContext</code> (may not be <code>null</code>)
    	 */
    	public static void setContext(SecurityContext context) {
    		strategy.setContext(context);
    	}
    
    	/**
    	 * Changes the preferred strategy. Do <em>NOT</em> call this method more than once for
    	 * a given JVM, as it will re-initialize the strategy and adversely affect any
    	 * existing threads using the old strategy.
    	 * @param strategyName the fully qualified class name of the strategy that should be
    	 * used.
    	 */
    	public static void setStrategyName(String strategyName) {
    		SecurityContextHolder.strategyName = strategyName;
    		initialize();
    	}
    
    	/**
    	 * Use this {@link SecurityContextHolderStrategy}.
    	 *
    	 * Call either {@link #setStrategyName(String)} or this method, but not both.
    	 *
    	 * This method is not thread safe. Changing the strategy while requests are in-flight
    	 * may cause race conditions.
    	 *
    	 * {@link SecurityContextHolder} maintains a static reference to the provided
    	 * {@link SecurityContextHolderStrategy}. This means that the strategy and its members
    	 * will not be garbage collected until you remove your strategy.
    	 *
    	 * To ensure garbage collection, remember the original strategy like so:
    	 *
    	 * <pre>
    	 *     SecurityContextHolderStrategy original = SecurityContextHolder.getContextHolderStrategy();
    	 *     SecurityContextHolder.setContextHolderStrategy(myStrategy);
    	 * </pre>
    	 *
    	 * And then when you are ready for {@code myStrategy} to be garbage collected you can
    	 * do:
    	 *
    	 * <pre>
    	 *     SecurityContextHolder.setContextHolderStrategy(original);
    	 * </pre>
    	 * @param strategy the {@link SecurityContextHolderStrategy} to use
    	 * @since 5.6
    	 */
    	public static void setContextHolderStrategy(SecurityContextHolderStrategy strategy) {
    		Assert.notNull(strategy, "securityContextHolderStrategy cannot be null");
    		SecurityContextHolder.strategyName = MODE_PRE_INITIALIZED;
    		SecurityContextHolder.strategy = strategy;
    		initialize();
    	}
    
    	/**
    	 * Allows retrieval of the context strategy. See SEC-1188.
    	 * @return the configured strategy for storing the security context.
    	 */
    	public static SecurityContextHolderStrategy getContextHolderStrategy() {
    		return strategy;
    	}
    
    	/**
    	 * Delegates the creation of a new, empty context to the configured strategy.
    	 */
    	public static SecurityContext createEmptyContext() {
    		return strategy.createEmptyContext();
    	}
    
    }

1.  MODE THREADLOCAL：这种存放策略是将 SecurityContext 存放在 ThreadLocal 中，⼤家知道 Threadlocal 的特点是在哪个线程中存储就要在哪个线程中读取，这其实⾮常适合 web 应⽤，因为在默认情况下，⼀个请求⽆论经过多少 Filter 到达 Servlet，都是由⼀个线程来处理的。这也是 SecurityContextHolder 的默认存储策略，这种存储策略意味着如果在具体的业务处理代码中，开启了⼦线程，在⼦线程中去获取登录⽤户数据，就会获取不到。
2.  MODE INHERITABLETHREADLOCAL：这种存储模式适⽤于多线程环境，如果希望在⼦线程中也能够获取到登录⽤户数据，那么可以使⽤这种存储模式。
3.  MODE GLOBAL：这种存储模式实际上是将数据保存在⼀个静态变量中，在 JavaWeb 开发中，这种模式很少使⽤到。

### SecurityContextHolderStrategy ###

通过 SecurityContextHolder 可以得知， SecurityContextHolderStrategy 接⼝⽤来定义存储策略⽅法

public interface SecurityContextHolderStrategy {
    
    	/**
    	 * Clears the current context.
    	 */
    	void clearContext();
    
    	/**
    	 * Obtains the current context.
    	 */
    	SecurityContext getContext();
    
    	/**
    	 * Sets the current context.
    	 */
    	void setContext(SecurityContext context);
    
    	/**
    	 * Creates a new, empty context implementation, for use by
    	 */
    	SecurityContext createEmptyContext();
    
    }

![6627b535b4be4a5084e18e5e523b62ed.png][]

从上⾯可以看出每⼀个实现类对应⼀种策略的实现。

### 获取用户数据 ###

@GetMapping("/hello")
        public String hello() {
            Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
            User user = (User) authentication.getPrincipal();
            return user.toString();
        }

![73a83caf959f42b491e55a9503bc25cf.png][]

### 多线程下获取用户数据 ###

@GetMapping("/hello")
        public String hello() {
            new Thread(() -> {
                Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
                User user = (User) authentication.getPrincipal();
                System.out.println(user.toString());
            }).start();
            return "hello page success";
        }

![2f718d88d4354f43873e20eb20eeb248.png][]

可以看到默认策略，是⽆法在⼦线程中获取⽤户信息，如果需要在⼦线程中获取必须使⽤第⼆种策略，默认策略是通过 System.getProperty 加载的，因此我们可以通过增加 VM Options 参数进⾏修改。

-Dspring.security.strategy=MODE_INHERITABLETHREADLOCAL

![7e05fb67aa154aa9ada16d3954f39bc9.png][]

## ⾃定义认证数据源 ##

[Servlet Authentication Architecture :: Spring Security][Servlet Authentication Architecture _ Spring Security]

![3e70fc85ca21453a9ee58d55bc6a7215.png][]

*  发起认证请求，请求中携带⽤户名、密码，该请求会被 UsernamePasswordAuthenticationFilter 拦截
 *  在 UsernamePasswordAuthenticationFilter 的 attemptAuthentication ⽅法中将请求中⽤户名和密码，封装为Authentication 对象，并交给 AuthenticationManager 进⾏认证
 *  认证成功，将认证信息存储到 SecurityContextHodler 以及调⽤记住我等，并回调 AuthenticationSuccessHandler 处理
 *  认证失败，清除 SecurityContextHodler 以及 记住我中信息，回调 AuthenticationFailureHandler 处理

### 三者关系 ###

从上⾯分析中得知， AuthenticationManager 是认证的核⼼类，但实际上在底层真正认证时还离不开 ProviderManager 以及 AuthenticationProvider 。他们三者关系是样的呢？

*  AuthenticationManager 是⼀个认证管理器，它定义了 Spring Security 过滤器要执⾏认证操作。
 *  ProviderManager AuthenticationManager接⼝的实现类。 Spring Security认证时默认使⽤就是 ProviderManager
 *  AuthenticationProvider 就是针对不同的身份类型执⾏的具体的身份认证。

**AuthenticationManager 与 ProviderManager**

ProviderManager 是 AuthenticationManager 的唯⼀实现，也是 Spring Security 默认使⽤实现。从这⾥不难看出默认情况下AuthenticationManager 就是⼀个ProviderManager。

**ProviderManager 与 AuthenticationProvider**

![011d0088b68a48b19ae6f179ed426a7c.png][]

在 Spring Seourity 中，允许系统同时⽀持多种不同的认证⽅式，例如同时⽀持⽤户名/密码认证、 ReremberMe 认证、⼿机号码动态认证等，⽽不同的认证⽅式对应了不同的 AuthenticationProvider，所以⼀个完整的认证流程可能由多个AuthenticationProvider 来提供。

多个 AuthenticationProvider 将组成⼀个列表，这个列表将由 ProviderManager 代理。换句话说，在ProviderManager 中存在⼀个 AuthenticationProvider 列表，在Provider Manager 中遍历列表中的每⼀个 AuthenticationProvider 去执⾏身份认证，最终得到认证结果。

ProviderManager 本身也可以再配置⼀个 AuthenticationManager 作为 parent，这样当ProviderManager 认证失败之后，就可以进⼊到 parent 中再次进⾏认证。理论上来说， ProviderManager 的 parent 可以是任意类型的AuthenticationManager，但是通常都是由 ProviderManager 来扮演 parent 的⻆⾊，也就是 ProviderManager 是ProviderManager 的 parent。 ProviderManager 本身也可以有多个，多个ProviderManager 共⽤同⼀个 parent。有时，⼀个应⽤程序有受保护资源的逻辑组（例如，所有符合路径模式的⽹络资源，如/api!!\*），每个组可以有⾃⼰的专⽤ AuthenticationManager。通常，每个组都是⼀个ProviderManager，它们共享⼀个⽗级。然后，⽗级是⼀种 全局资源，作为所有提供者的后备资源。

[Getting Started | Spring Security Architecture][Getting Started _ Spring Security Architecture]

弄清楚认证原理之后我们来看下具体认证时数据源的获取。 默认情况下 AuthenticationProvider 是由 DaoAuthenticationProvider 类来实现认证的，在DaoAuthenticationProvider 认证时⼜通过 UserDetailsService 完成数据源的校验。 他们之间调⽤关系如下：

![5793c7be00e949ff8460dcebddf6897b.png][]

**总结**: AuthenticationManager 是认证管理器，在 Spring Security 中有全局 AuthenticationManager，也可以有局部AuthenticationManager。全局的 AuthenticationManager ⽤来对全局认证进⾏处理，局部的 AuthenticationManager ⽤来对某些特殊资源认证处理。当然⽆论是全局认证管理器还是局部认证管理器都是由 ProviderManger 进⾏实现。 每⼀个ProviderManger 中都代理⼀个 AuthenticationProvider 的列表，列表中每⼀个实现代表⼀种身份认证⽅式。认证时底层数据源需要调⽤ UserDetailService 来实现

### 配置全局 AuthenticationManager ###

[Getting Started | Spring Security Architecture][Getting Started _ Spring Security Architecture 1]

#### **默认的全局 AuthenticationManager** ####

@Configuration
    public class WebSecurityConfigurer extends WebSecurityConfigurerAdapter {
      @Autowired
      public void initialize(AuthenticationManagerBuilder builder) {
        //builder..
      }
    }

springboot 对 security 进行自动配置时自动在工厂中创建一个全局AuthenticationManager

**总结**

*  默认自动配置创建全局AuthenticationManager 默认找当前项目中是否存在自定义 UserDetailService 实例 自动将当前项目 UserDetailService 实例设置为数据源
 *  默认自动配置创建全局AuthenticationManager 在工厂中使用时直接在代码中注入即可

#### 自定义全局 AuthenticationManager ####

@Configuration
    public class WebSecurityConfigurer extends WebSecurityConfigurerAdapter {
      @Override
      public void configure(AuthenticationManagerBuilder builder) {
        //builder ....
      }
    }

总结

*  一旦通过 configure 方法自定义 AuthenticationManager实现 就回将工厂中自动配置AuthenticationManager 进行覆盖
 *  一旦通过 configure 方法自定义 AuthenticationManager实现 需要在实现中指定认证数据源对象 UserDetaiService 实例
 *  一旦通过 configure 方法自定义 AuthenticationManager实现 这种方式创建AuthenticationManager对象工厂内部本地一个 AuthenticationManager 对象 不允许在其他自定义组件中进行注入

@Configuration
    public class WebSecurityConfigurer extends WebSecurityConfigurerAdapter {
      
        //1.自定义AuthenticationManager  推荐  并没有在工厂中暴露出来
        @Override
        public void configure(AuthenticationManagerBuilder builder) throws Exception {
            System.out.println("自定义AuthenticationManager: " + builder);
            builder.userDetailsService(userDetailsService());
        }
    
        //作用: 用来将自定义AuthenticationManager在工厂中进行暴露,可以在任何位置注入
        @Override
        @Bean
        public AuthenticationManager authenticationManagerBean() throws Exception {
            return super.authenticationManagerBean();
        }
    }

## 自定义内存数据源 ##

@Configuration
    public class WebSecurityConfig {
    
        @Bean
        public UserDetailsService userDetailsService(){
            UserDetails user = User.withUsername("admin").password("{noop}123").roles("ADMIN").build();
            return new InMemoryUserDetailsManager(user);
        }
    
        @Bean
        public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
            http.authorizeHttpRequests()
                    .mvcMatchers("/index")
                    .permitAll()
                    .anyRequest().authenticated()
                    .and().formLogin()
                    .successHandler(new LoginSuccessHandler())
                    .failureHandler(new LoginFailureHandler())
                    .and().logout().logoutSuccessHandler(new LogoutHandler())
                    .and().userDetailsService(userDetailsService());
            return http.csrf().disable().build();
        }
    }

### 自定义数据库数据源 ###

-- 用户表
    CREATE TABLE `user`
    (
        `id`                    int(11) NOT NULL AUTO_INCREMENT,
        `username`              varchar(32)  DEFAULT NULL,
        `password`              varchar(255) DEFAULT NULL,
        `enabled`               tinyint(1) DEFAULT NULL,
        `accountNonExpired`     tinyint(1) DEFAULT NULL,
        `accountNonLocked`      tinyint(1) DEFAULT NULL,
        `credentialsNonExpired` tinyint(1) DEFAULT NULL,
        PRIMARY KEY (`id`)
    ) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;
    
    -- 角色表
    CREATE TABLE `role`
    (
        `id`      int(11) NOT NULL AUTO_INCREMENT,
        `name`    varchar(32) DEFAULT NULL,
        `name_zh` varchar(32) DEFAULT NULL,
        PRIMARY KEY (`id`)
    ) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;
    
    -- 用户角色关系表
    CREATE TABLE `user_role`
    (
        `id`  int(11) NOT NULL AUTO_INCREMENT,
        `uid` int(11) DEFAULT NULL,
        `rid` int(11) DEFAULT NULL,
        PRIMARY KEY (`id`),
        KEY   `uid` (`uid`),
        KEY   `rid` (`rid`)
    ) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8;

-- 插入用户数据
    BEGIN;
      INSERT INTO `user`
      VALUES (1, 'root', '{noop}123', 1, 1, 1, 1);
      INSERT INTO `user`
      VALUES (2, 'admin', '{noop}123', 1, 1, 1, 1);
      INSERT INTO `user`
      VALUES (3, 'cheny', '{noop}123', 1, 1, 1, 1);
    COMMIT;
    
    -- 插入角色数据
    BEGIN;
      INSERT INTO `role`
      VALUES (1, 'ROLE_product', '商品管理员');
      INSERT INTO `role`
      VALUES (2, 'ROLE_admin', '系统管理员');
      INSERT INTO `role`
      VALUES (3, 'ROLE_user', '用户管理员');
    COMMIT;
    
    -- 插入用户角色数据
    BEGIN;
      INSERT INTO `user_role`
      VALUES (1, 1, 1);
      INSERT INTO `user_role`
      VALUES (2, 1, 2);
      INSERT INTO `user_role`
      VALUES (3, 2, 2);
      INSERT INTO `user_role`
      VALUES (4, 3, 3);
    COMMIT;

**项目中引入依赖**

<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-security</artifactId>
    </dependency>
    
    <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>2.2.0</version>
    </dependency>
    
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.29</version>
    </dependency>
    
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid</artifactId>
        <version>1.2.7</version>
    </dependency>
    
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
    </dependency>

**配置 springboot 配置文件**

spring:
      datasource:
        type: com.alibaba.druid.pool.DruidDataSource
        driver-class-name: com.mysql.cj.jdbc.Driver
        url: jdbc:mysql://localhost:3306/security?useUnicode=true&useSSL=false&characterEncoding=utf8&serverTimezone=GMT%2B8&allowMultiQueries=true
        username: root
        password: root
    
    mybatis:
      mapper-locations: mapper/*Mapper.xml
      type-aliases-package: com.yang.entity

**创建 entity**

@Data
    public class User implements UserDetails {
    
        private Integer id;
        private String username;
        private String password;
        private Boolean enabled;
        private Boolean accountNonExpired;
        private Boolean accountNonLocked;
        private Boolean credentialsNonExpired;
        private List<Role> roles = new ArrayList<>();
    
    
        @Override
        public Collection<? extends GrantedAuthority> getAuthorities() {
            List<GrantedAuthority> grantedAuthorities = new ArrayList<>();
            roles.forEach(role->grantedAuthorities.add(new SimpleGrantedAuthority(role.getName())));
            return grantedAuthorities;
        }
    
        @Override
        public String getPassword() {
            return password;
        }
    
        @Override
        public String getUsername() {
            return username;
        }
    
        @Override
        public boolean isAccountNonExpired() {
            return accountNonExpired;
        }
    
        @Override
        public boolean isAccountNonLocked() {
            return accountNonLocked;
        }
    
        @Override
        public boolean isCredentialsNonExpired() {
            return credentialsNonExpired;
        }
    
        @Override
        public boolean isEnabled() {
            return enabled;
        }
    }

@Data
    public class Role {
    
        private Integer id;
        private String name;
        private String nameZh;
    }

**创建 UserMapper 接口，编写sql语句**

@Mapper
    public interface UserMapper {
    
        //根据用户名查询用户
        User loadUserByUsername(String username);
    
        //根据用户id查询角色
        List<Role> getRolesByUid(Integer uid);
    }

<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
    <mapper namespace="com.yang.mapper.UserMapper">
        
        <select id="loadUserByUsername" resultType="com.yang.entity.User">
            select id,
                   username,
                   password,
                   enabled,
                   accountNonExpired,
                   accountNonLocked,
                   credentialsNonExpired
            from user
            where username = #{username}
        </select>
    
        
        <select id="getRolesByUid" resultType="com.yang.entity.Role">
            select r.id,
                   r.name,
                   r.name_zh nameZh
            from role r,
                 user_role ur
            where r.id = ur.rid
              and ur.uid = #{uid}
        </select>
    </mapper>

**创建 service**

public interface UserService {
    
        UserDetails loadUserByUsername(String username);
    }
    
    
    @Service
    public class UserServiceImpl implements UserService {
    
        private final UserMapper userMapper;
    
        @Autowired
        public UserServiceImpl(UserMapper userMapper) {
            this.userMapper = userMapper;
        }
    
        @Override
        public UserDetails loadUserByUsername(String username) {
            User user = userMapper.loadUserByUsername(username);
            if(ObjectUtils.isEmpty(user)){
                throw new RuntimeException("用户不存在");
            }
            user.setRoles(userMapper.getRolesByUid(user.getId()));
            return user;
        }
    }

**创建 UserDetailsService**

@Component
    public class UserDetailService implements UserDetailsService {
    
        private final UserService userService;
    
        public UserDetailService(UserService userService) {
            this.userService = userService;
        }
    
        @Override
        public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
            return userService.loadUserByUsername(username);
        }
    }

**配置 authenticationManager 使用自定义UserDetailService**

@Configuration
    public class SecurityWebConfig {
    
        private final UserDetailService userDetailService;
    
        public SecurityWebConfig(UserDetailService userDetailService) {
            this.userDetailService = userDetailService;
        }
    
        @Bean
        public AuthenticationManager authenticationManager(AuthenticationConfiguration authenticationConfiguration) throws Exception {
            return authenticationConfiguration.getAuthenticationManager();
        }
    
    
        @Bean
        public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
            http.authorizeHttpRequests()
                    .mvcMatchers("/index")
                    .permitAll()
                    .anyRequest().authenticated()
                    .and().formLogin()
                    .successHandler(new LoginSuccessHandler())
                    .failureHandler(new LoginFailureHandler())
                    .and().logout().logoutSuccessHandler(new LogoutHandler()) // 注销登入处理器
                    .and().userDetailsService(userDetailService); // 自定义数据源
            return http.csrf().disable().build();
        }
    }

## 添加验证码 ##

<dependency>
        <groupId>com.github.penggle</groupId>
        <artifactId>kaptcha</artifactId>
        <version>2.3.2</version>
    </dependency>

**生成验证码**

@Configuration
    public class KaptchaConfig {
    
        @Bean
        public Producer kaptcha() {
            Properties properties = new Properties();
            properties.setProperty("kaptcha.image.width", "150");
            properties.setProperty("kaptcha.image.height", "50");
            properties.setProperty("kaptcha.textproducer.char.string", "0123456789");
            properties.setProperty("kaptcha.textproducer.char.length", "4");
            Config config = new Config(properties);
            DefaultKaptcha defaultKaptcha = new DefaultKaptcha();
            defaultKaptcha.setConfig(config);
            return defaultKaptcha;
        }
    }

@RestController
    public class KaptchaController {
        private final Producer producer;
    
        public KaptchaController(Producer producer) {
            this.producer = producer;
        }
    
        @GetMapping("/vc.png")
        public String getVerifyCode(HttpSession session) throws IOException {
            //1.生成验证码
            String code = producer.createText();
            session.setAttribute("kaptcha", code);//可以更换成 redis 实现
            BufferedImage bi = producer.createImage(code);
            //2.写入内存
            FastByteArrayOutputStream fos = new FastByteArrayOutputStream();
            ImageIO.write(bi, "png", fos);
            //3.生成 base64
            return Base64.encodeBase64String(fos.toByteArray());
        }
    }

**定义验证码异常类**

public class KaptchaNotMatchException extends AuthenticationException {
    
        public KaptchaNotMatchException(String msg) {
            super(msg);
        }
    
        public KaptchaNotMatchException(String msg, Throwable cause) {
            super(msg, cause);
        }
    }

**在自定义LoginKaptchaFilter中加入验证码验证**

/**
     * @Author: chenyang
     * @DateTime: 2023/2/27 10:14
     * @Description: 自定义过滤器
     */
    public class LoginKaptchaFilter extends UsernamePasswordAuthenticationFilter {
    
        public static final String FORM_CAPTCHA_KEY = "captcha";
    
        private String kaptchaParameter = FORM_CAPTCHA_KEY;
    
        public String getKaptchaParameter() {
            return kaptchaParameter;
        }
    
        public void setKaptchaParameter(String kaptchaParameter) {
            this.kaptchaParameter = kaptchaParameter;
        }
    
        @Override
        public Authentication attemptAuthentication(HttpServletRequest request, HttpServletResponse response) throws AuthenticationException {
            if (!request.getMethod().equals("POST")) {
                throw new AuthenticationServiceException("Authentication method not supported: " + request.getMethod());
            }
            try {
                //1.获取请求数据
                Map<String, String> userInfo = new ObjectMapper().readValue(request.getInputStream(), Map.class);
                String kaptcha = userInfo.get(getKaptchaParameter());//用来获取数据中验证码
                String username = userInfo.get(getUsernameParameter());//用来接收用户名
                String password = userInfo.get(getPasswordParameter());//用来接收密码
                //2.获取 session 中验证码
                String sessionVerifyCode = (String) request.getSession().getAttribute(FORM_CAPTCHA_KEY);
                if (!ObjectUtils.isEmpty(kaptcha) && !ObjectUtils.isEmpty(sessionVerifyCode) &&
                        kaptcha.equalsIgnoreCase(sessionVerifyCode)) {
                    //3.获取用户名 和密码认证
                    UsernamePasswordAuthenticationToken authRequest = new UsernamePasswordAuthenticationToken(username, password);
                    setDetails(request, authRequest);
                    return this.getAuthenticationManager().authenticate(authRequest);
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
            throw new KaptchaNotMatchException("验证码不匹配!");
        }
    }

**配置**

@Configuration
    public class WebSecurityConfig {
    
        private final UserDetailService userDetailService;
    
        public WebSecurityConfig(UserDetailService userDetailService) {
            this.userDetailService = userDetailService;
        }
    
    
        @Bean
        public AuthenticationManager authenticationManager(AuthenticationConfiguration authenticationConfiguration) throws Exception {
            return authenticationConfiguration.getAuthenticationManager();
        }
    
        @Bean
        public LoginKaptchaFilter loginKaptchaFilter(AuthenticationManager authenticationManager) {
            LoginKaptchaFilter filter = new LoginKaptchaFilter();
            //1.认证 url
            filter.setFilterProcessesUrl("/doLogin");
    
            //2.认证 接收参数
            filter.setUsernameParameter("username");
            filter.setPasswordParameter("pwd");
            filter.setKaptchaParameter("kaptcha");
    
            //3.指定认证管理器
            filter.setAuthenticationManager(authenticationManager);
    
            // 4.指定成功/失败时处理
            filter.setAuthenticationSuccessHandler(new LoginSuccessHandler());
            filter.setAuthenticationFailureHandler(new LoginFailureHandler());
    
            return filter;
        }
    
        @Bean
        public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
            http.authorizeHttpRequests()
                    .mvcMatchers("/index", "/vc.png")
                    .permitAll()
                    .anyRequest().authenticated()
                    .and().formLogin()
                    .and().logout().logoutSuccessHandler(new LogoutHandler()) // 注销登入处理器
                    .and().exceptionHandling().authenticationEntryPoint(new UnAuthenticationHandler()) // 未认证处理器
                    .and().userDetailsService(userDetailService) // 自定义数据源
                    .addFilterBefore(loginKaptchaFilter(http.getSharedObject(AuthenticationManager.class)), UsernamePasswordAuthenticationFilter.class); // 自定义过滤器
            return http.csrf().disable().build();
        }
    }

**自定义认证异常处理类**

/**
     * @Author: chenyang
     * @DateTime: 2023/2/27 11:27
     * @Description: 未认证时请求处理器
     */
    public class UnAuthenticationHandler implements AuthenticationEntryPoint {
    
        @Override
        public void commence(HttpServletRequest request, HttpServletResponse response, AuthenticationException authException) throws IOException {
            response.setContentType("application/json;charset=UTF-8");
            response.setStatus(HttpStatus.UNAUTHORIZED.value());
            response.getWriter().println("必须认证之后才能访问!");
        }
    }

[spring cloud security 中的 AuthenticationEntryPoint 设置与 AccessDeniedException 捕获过程 - 掘金][spring cloud security _ AuthenticationEntryPoint _ AccessDeniedException _ -]

[SpringSecurity系列 之 AuthenticationEntryPoint接口及其实现类的用法\_oauth2authenticationentrypoint\_姠惢荇者的博客-CSDN博客][SpringSecurity_ _ AuthenticationEntryPoint_oauth2authenticationentrypoint_-CSDN]

#### 测试验证 ####

调用接口获取图片的Base64 编码，再将编码转换成图片

![d4d3942d0e0241199e0a9e23ae38479b.png][]

**登入**

![a58cdf9d71b2428a871a9920dc555ed7.png][]

**调用获取验证码接口时会自动保存session**

![ada46b0ab31a461dbacb05868bbfc7f4.png][]

![b190252a645c404dbd6fa328c96a9ff8.png][]

[c968ba653baf43088badd71d3563d730.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/23/7e4d3b3924da486c8bba2c38c31ebd27.png
[6627b535b4be4a5084e18e5e523b62ed.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/23/bdbc815cd7564812880d1b7ef79ec0c5.png
[73a83caf959f42b491e55a9503bc25cf.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/23/6bdc4912157b4b4fa8febc44fb4845cc.png
[2f718d88d4354f43873e20eb20eeb248.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/23/affd6212c74d4580bae0dff31de15cdc.png
[7e05fb67aa154aa9ada16d3954f39bc9.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/23/2cd34d4a6a3a4f0b99bb347eb616e280.png
[Servlet Authentication Architecture _ Spring Security]: https://docs.spring.io/spring-security/reference/servlet/authentication/architecture.html#page-title
[3e70fc85ca21453a9ee58d55bc6a7215.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/23/685d09c1ddd54702841f499d06713538.png
[011d0088b68a48b19ae6f179ed426a7c.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/23/a4368f28410345adbe026dfdfb294744.png
[Getting Started _ Spring Security Architecture]: https://spring.io/guides/topicals/spring-security-architecture/
[5793c7be00e949ff8460dcebddf6897b.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/23/02ae4d47cfa64bd3b2769476c44b5831.png
[Getting Started _ Spring Security Architecture 1]: https://spring.io/guides/topicals/spring-security-architecture
[spring cloud security _ AuthenticationEntryPoint _ AccessDeniedException _ -]: https://juejin.cn/post/7050071382041821197
[SpringSecurity_ _ AuthenticationEntryPoint_oauth2authenticationentrypoint_-CSDN]: https://blog.csdn.net/hou_ge/article/details/120435303
[d4d3942d0e0241199e0a9e23ae38479b.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/23/2587f15a4d5940d4b9ef323a52d206a0.png
[a58cdf9d71b2428a871a9920dc555ed7.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/23/3a779a4118e248e8b8e17ab09ad56b4b.png
[ada46b0ab31a461dbacb05868bbfc7f4.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/23/46f9bd695fad462481caec8ed2e64315.png
[b190252a645c404dbd6fa328c96a9ff8.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/23/ee121a63c33f493ca89daacb6597d2e6.png