spring security 配置多个AuthenticationProvider

前言

　　发现不多关于spring security的文章，基本都是入门级的，配个UserServiceDetails或者配个路由控制就完事了，并且不少仍是xml配置，国内通病...so，本文里的配置都是java配置，不涉及xml配置，事实上我也不会xml配置

spring security的大致介绍

　　spring security自己若是只是说配置，仍是很简单易懂的（我也不知道网上说spring security难，难在哪里），简单不须要特别的功能，一个WebSecurityConfigurerAdapter的实现，而后实现UserServiceDetails就是简单的数据库验证了，这个我就不说了。

　　spring security大致上是由一堆Filter（因此才能在spring mvc前拦截请求）实现的，Filter有几个，登出Filter（LogoutFilter），用户名密码验证Filter（UsernamePasswordAuthenticationFilter）之类的，Filter再交由其余组件完成细分的功能，例如最经常使用的UsernamePasswordAuthenticationFilter会持有一个AuthenticationManager引用，AuthenticationManager顾名思义，验证管理器，负责验证的，但AuthenticationManager自己并不作具体的验证工做，AuthenticationManager持有一个AuthenticationProvider集合，AuthenticationProvider才是作验证工做的组件，AuthenticationManager和AuthenticationProvider的工做机制能够大概看一下这两个的java doc，而后成功失败都有相对应该Handler 。大致的spring security的验证工做流程就是这样了。

开始配置多AuthenticationProvider

首先，写一个内存认证的AuthenticationProvider，这里我简单地写一个只有root账号的AuthenticationProvider

package com.scau.equipment.config.common.security.provider;

import org.springframework.security.authentication.AuthenticationProvider;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.User;
import org.springframework.stereotype.Component;

import java.util.Arrays;
import java.util.List;

/**
 * Created by Administrator on 2017-05-10.
 */
@Component
public class InMemoryAuthenticationProvider implements AuthenticationProvider {
    private final String adminName = "root";
    private final String adminPassword = "root";

    //根用户拥有所有的权限
    private final List<GrantedAuthority> authorities = Arrays.asList(new SimpleGrantedAuthority("CAN_SEARCH"),
            new SimpleGrantedAuthority("CAN_SEARCH"),
            new SimpleGrantedAuthority("CAN_EXPORT"),
            new SimpleGrantedAuthority("CAN_IMPORT"),
            new SimpleGrantedAuthority("CAN_BORROW"),
            new SimpleGrantedAuthority("CAN_RETURN"),
            new SimpleGrantedAuthority("CAN_REPAIR"),
            new SimpleGrantedAuthority("CAN_DISCARD"),
            new SimpleGrantedAuthority("CAN_EMPOWERMENT"),
            new SimpleGrantedAuthority("CAN_BREED"));

    @Override
    public Authentication authenticate(Authentication authentication) throws AuthenticationException {
        if(isMatch(authentication)){
            User user = new User(authentication.getName(),authentication.getCredentials().toString(),authorities);
            return new UsernamePasswordAuthenticationToken(user,authentication.getCredentials(),authorities);
        }
        return null;
    }

    @Override
    public boolean supports(Class<?> authentication) {
        return true;
    }

    private boolean isMatch(Authentication authentication){
        if(authentication.getName().equals(adminName)&&authentication.getCredentials().equals(adminPassword))
            return true;
        else
            return false;
    }
}

InMemoryAuthenticationProvider

　　support方法检查authentication的类型是否是这个AuthenticationProvider支持的，这里我简单地返回true，就是全部都支持，这里所说的authentication为何会有多个类型，是由于多个AuthenticationProvider能够返回不一样的Authentication。

　　public Authentication authenticate(Authentication authentication) throws AuthenticationException 方法就是验证过程。

　　若是AuthenticationProvider返回了null，AuthenticationManager会交给下一个支持authentication类型的AuthenticationProvider处理。

 

另外须要一个数据库认证的AuthenticationProvider，咱们能够直接用spring security提供的DaoAuthenticationProvider，设置一下UserServiceDetails和PasswordEncoder就能够了

 @Bean
    DaoAuthenticationProvider daoAuthenticationProvider(){
        DaoAuthenticationProvider daoAuthenticationProvider = new DaoAuthenticationProvider();
        daoAuthenticationProvider.setPasswordEncoder(new BCryptPasswordEncoder());
        daoAuthenticationProvider.setUserDetailsService(userServiceDetails);
        return daoAuthenticationProvider;
    }

DaoAuthenticationProvider

 

最后在WebSecurityConfigurerAdapter里配置一个含有以上两个AuthenticationProvider的AuthenticationManager，依然重用spring security提供的ProviderManager

 1 package com.scau.equipment.config.common.security;
 2 
 3 import com.scau.equipment.config.common.security.handler.AjaxLoginFailureHandler;
 4 import com.scau.equipment.config.common.security.handler.AjaxLoginSuccessHandler;
 5 import com.scau.equipment.config.common.security.provider.InMemoryAuthenticationProvider;
 6 import org.springframework.beans.factory.annotation.Autowired;
 7 import org.springframework.context.annotation.Bean;
 8 import org.springframework.context.annotation.Configuration;
 9 import org.springframework.security.authentication.AuthenticationManager;
10 import org.springframework.security.authentication.ProviderManager;
11 import org.springframework.security.authentication.dao.DaoAuthenticationProvider;
12 import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
13 import org.springframework.security.config.annotation.authentication.configurers.provisioning.InMemoryUserDetailsManagerConfigurer;
14 import org.springframework.security.config.annotation.authentication.configurers.provisioning.UserDetailsManagerConfigurer;
15 import org.springframework.security.config.annotation.web.builders.HttpSecurity;
16 import org.springframework.security.config.annotation.web.builders.WebSecurity;
17 import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
18 import org.springframework.security.core.GrantedAuthority;
19 import org.springframework.security.core.authority.SimpleGrantedAuthority;
20 import org.springframework.security.core.userdetails.UserDetailsService;
21 import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
22 
23 import java.util.Arrays;
24 import java.util.List;
25 
26 /**
27  * Created by Administrator on 2017/2/17.
28  */
29 @Configuration
30 public class SecurityConfig extends WebSecurityConfigurerAdapter {
31 
32     @Autowired
33     UserDetailsService userServiceDetails;
34 
35     @Autowired
36     InMemoryAuthenticationProvider inMemoryAuthenticationProvider;
37 
38     @Bean
39     DaoAuthenticationProvider daoAuthenticationProvider(){
40         DaoAuthenticationProvider daoAuthenticationProvider = new DaoAuthenticationProvider();
41         daoAuthenticationProvider.setPasswordEncoder(new BCryptPasswordEncoder());
42         daoAuthenticationProvider.setUserDetailsService(userServiceDetails);
43         return daoAuthenticationProvider;
44     }
45 
46     @Override
47     protected void configure(HttpSecurity http) throws Exception {
48         http
49                 .csrf().disable()
50                 .rememberMe().alwaysRemember(true).tokenValiditySeconds(86400).and()
51                 .authorizeRequests()
52                     .antMatchers("/","/*swagger*/**", "/v2/api-docs").permitAll()
53                     .anyRequest().authenticated().and()
54                 .formLogin()
55                     .loginPage("/")
56                     .loginProcessingUrl("/login")
57                     .successHandler(new AjaxLoginSuccessHandler())
58                     .failureHandler(new AjaxLoginFailureHandler()).and()
59                 .logout().logoutUrl("/logout").logoutSuccessUrl("/");
60     }
61 
62     @Override
63     public void configure(WebSecurity web) throws Exception {
64         web.ignoring().antMatchers("/public/**", "/webjars/**", "/v2/**", "/swagger**");
65     }
66 
67     @Override
68     protected AuthenticationManager authenticationManager() throws Exception {
69         ProviderManager authenticationManager = new ProviderManager(Arrays.asList(inMemoryAuthenticationProvider,daoAuthenticationProvider()));
70         //不擦除认证密码，擦除会致使TokenBasedRememberMeServices由于找不到Credentials再调用UserDetailsService而抛出UsernameNotFoundException
71         authenticationManager.setEraseCredentialsAfterAuthentication(false);
72         return authenticationManager;
73     }
74 
75     /**
76      * 这里须要提供UserDetailsService的缘由是RememberMeServices须要用到
77      * @return
78      */
79     @Override
80     protected UserDetailsService userDetailsService() {
81         return userServiceDetails;
82     }
83 }

WebSecurityConfigurerAdapter

 

　　基本上都是重用了原有的类，不少都是默认使用的，只不过为了修改下行为而从新配置。其实若是偷懒，直接用一个UserDetailsService，在里面作各类认证也是能够的~不过这样就没意思了