spring security自定义指南

栏目: Java · 发布时间: 6年前

内容简介：spring security自定义指南
  • 自定义UserDetailsService
  • 自定义passwordEncoder
  • 自定义filter
  • 自定义AuthenticationProvider
  • 自定义AccessDecisionManager
  • 自定义securityMetadataSource
  • 自定义access访问控制
  • 自定义authenticationEntryPoint
  • 自定义多个WebSecurityConfigurerAdapter

自定义UserDetailsService

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
	//......
	@Bean
    @Override
    protected UserDetailsService userDetailsService(){
        InMemoryUserDetailsManager manager = new InMemoryUserDetailsManager();
        manager.createUser(User.withUsername("demoUser1").password("123456")
                .authorities("ROLE_USER","read_x").build());
        manager.createUser(User.withUsername("admin").password("123456")
                .authorities("ROLE_ADMIN").build());
        return manager;
    }
}

通过重写userDetailsService()方法自定义userDetailsService。这里展示的是InMemoryUserDetailsManager。 spring security内置了JdbcUserDetailsManager，可以自行扩展

自定义passwordEncoder

自定义密码的加密方式，实例如下

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    //......

    @Bean
    public DaoAuthenticationProvider authenticationProvider() {
        final DaoAuthenticationProvider authProvider = new DaoAuthenticationProvider();
        authProvider.setUserDetailsService(userDetailsService);
        authProvider.setPasswordEncoder(encoder());
        return authProvider;
    }

    @Bean
    public PasswordEncoder encoder() {
        return new BCryptPasswordEncoder(11);
    }
}

自定义filter

自定义filter离不开对spring security内置filter的顺序的认知：

Standard Filter Aliases and Ordering

spring security内置的各种filter顺序如下：

Alias Filter Class Namespace Element or Attribute
CHANNEL_FILTER ChannelProcessingFilter http/intercept-url@requires-channel
SECURITY_CONTEXT_FILTER SecurityContextPersistenceFilter http
CONCURRENT_SESSION_FILTER ConcurrentSessionFilter session-management/concurrency-control
HEADERS_FILTER HeaderWriterFilter http/headers
CSRF_FILTER CsrfFilter http/csrf
LOGOUT_FILTER LogoutFilter http/logout
X509_FILTER X509AuthenticationFilter http/x509
PRE_AUTH_FILTER AbstractPreAuthenticatedProcessingFilter Subclasses N/A
CAS_FILTER CasAuthenticationFilter N/A
FORM_LOGIN_FILTER UsernamePasswordAuthenticationFilter http/form-login
BASIC_AUTH_FILTER BasicAuthenticationFilter http/http-basic
SERVLET_API_SUPPORT_FILTER SecurityContextHolderAwareRequestFilter http/@servlet-api-provision
JAAS_API_SUPPORT_FILTER JaasApiIntegrationFilter http/@jaas-api-provision
REMEMBER_ME_FILTER RememberMeAuthenticationFilter http/remember-me
ANONYMOUS_FILTER AnonymousAuthenticationFilter http/anonymous
SESSION_MANAGEMENT_FILTER SessionManagementFilter session-management
EXCEPTION_TRANSLATION_FILTER ExceptionTranslationFilter http
FILTER_SECURITY_INTERCEPTOR FilterSecurityInterceptor http
SWITCH_USER_FILTER SwitchUserFilter N/A

内置的认证filter

  • UsernamePasswordAuthenticationFilter

参数有username,password的，走UsernamePasswordAuthenticationFilter，提取参数构造UsernamePasswordAuthenticationToken进行认证，成功则填充SecurityContextHolder的Authentication

  • BasicAuthenticationFilter

header里头有Authorization，而且value是以Basic开头的，则走BasicAuthenticationFilter，提取参数构造UsernamePasswordAuthenticationToken进行认证，成功则填充SecurityContextHolder的Authentication

  • AnonymousAuthenticationFilter

给没有登陆的用户，填充AnonymousAuthenticationToken到SecurityContextHolder的Authentication

定义自己的filter

可以像UsernamePasswordAuthenticationFilter或者AnonymousAuthenticationFilter继承GenericFilterBean，或者像BasicAuthenticationFilter继承OncePerRequestFilter。 关于GenericFilterBean与OncePerRequestFilter的区别可以见这篇 spring mvc中的几类拦截器对比

自定义filter主要完成功能如下：

  • 提取认证参数
  • 调用认证，成功则填充SecurityContextHolder的Authentication，失败则抛出异常

实例

public class DemoAuthFilter extends GenericFilterBean {

    private final AuthenticationManager authenticationManager;

    public DemoAuthFilter(AuthenticationManager authenticationManager) {
        this.authenticationManager = authenticationManager;
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest httpServletRequest = (HttpServletRequest) servletRequest;
        HttpServletResponse httpServletResponse = (HttpServletResponse) servletResponse;

        String token = httpServletRequest.getHeader("app_token");
        if(StringUtils.isEmpty(token)){
            httpServletResponse.sendError(HttpServletResponse.SC_UNAUTHORIZED, "invalid token");
            return ;
        }

        try {
            Authentication auth = authenticationManager.authenticate(new WebToken(token));
            SecurityContextHolder.getContext().setAuthentication(auth);
            filterChain.doFilter(servletRequest, servletResponse);
        } catch (AuthenticationException e) {
            httpServletResponse.sendError(HttpServletResponse.SC_UNAUTHORIZED, e.getMessage());
        }
    }
}

设置filter顺序

上面定义完filter之后，然后就要将它放置到filterChain中

@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class SecurityConfig extends WebSecurityConfigurerAdapter {
	//......
	@Override
    protected void configure(HttpSecurity http) throws Exception {
        http.addFilterBefore(new DemoAuthFilter(authenticationManager()), BasicAuthenticationFilter.class);
        http.csrf().disable();
        http.logout().disable();
        http.sessionManagement().disable();
    }
}

这里把他添加在BasicAuthenticationFilter之前，当然可以根据情况直接替换UsernamePasswordAuthenticationFilter

http.addFilterAt(new DemoAuthFilter(authenticationManager()),UsernamePasswordAuthenticationFilter.class);

自定义AuthenticationProvider

AuthenticationManager接口有个实现ProviderManager相当于一个provider chain，它里头有个List providers，通过provider来实现认证。

public Authentication authenticate(Authentication authentication)
			throws AuthenticationException {
		Class<? extends Authentication> toTest = authentication.getClass();
		AuthenticationException lastException = null;
		Authentication result = null;
		boolean debug = logger.isDebugEnabled();

		for (AuthenticationProvider provider : getProviders()) {
			if (!provider.supports(toTest)) {
				continue;
			}

			//......
			try {
				result = provider.authenticate(authentication);

				if (result != null) {
					copyDetails(authentication, result);
					break;
				}
			}
			catch (AccountStatusException e) {
				prepareException(e, authentication);
				// SEC-546: Avoid polling additional providers if auth failure is due to
				// invalid account status
				throw e;
			}
			catch (InternalAuthenticationServiceException e) {
				prepareException(e, authentication);
				throw e;
			}
			catch (AuthenticationException e) {
				lastException = e;
			}
		}

		//......
	}

AuthenticationProvider通过supports方法来标识它是否能够处理这个类型的Authentication。 AnonymousAuthenticationFilter构造的是AnonymousAuthenticationToken，由AnonymousAuthenticationProvider来处理

public class AnonymousAuthenticationProvider implements AuthenticationProvider,
		MessageSourceAware {
		//......
		public boolean supports(Class<?> authentication) {
			return (AnonymousAuthenticationToken.class.isAssignableFrom(authentication));
		}
}

UsernamePasswordAuthenticationFilter，BasicAuthenticationFilter构造的是UsernamePasswordAuthenticationToken，由DaoAuthenticationProvider(其父类为AbstractUserDetailsAuthenticationProvider)来处理

public abstract class AbstractUserDetailsAuthenticationProvider implements
		AuthenticationProvider, InitializingBean, MessageSourceAware {
		//......
		public boolean supports(Class<?> authentication) {
			return (UsernamePasswordAuthenticationToken.class
				.isAssignableFrom(authentication));
		}
}

像上面我们自定义了WebToken，其实例如下：

可以实现Authentication接口，或者继承AbstractAuthenticationToken

public class WebToken extends AbstractAuthenticationToken {

    private final String token;

    public WebToken(String token) {
        super(null);
        this.token = token;
    }

    @Override
    public Object getCredentials() {
        return this.token;
    }

    @Override
    public Object getPrincipal() {
        return null;
    }
}

这里就自定义一下支持这类WebToken的AuthenticationProvider

AuthenticationProvider要实现的功能就是根据参数来校验是否可以登录通过，不通过则抛出异常；通过则获取其GrantedAuthority填充到authentication中 如果是继承了AbstractAuthenticationToken，则是填充其authorities属性 前面自定义的DemoAuthFilter会在登陆成功之后，将authentication写入到SecurityContextHolder的context中 可以实现AuthenticationProvider接口，或者继承AbstractUserDetailsAuthenticationProvider( 默认集成了preAuthenticationChecks以及postAuthenticationChecks ) 

@Service
public class MyAuthProvider implements AuthenticationProvider {
	//...
	@Override
    public Authentication authenticate(Authentication authentication) throws AuthenticationException {
    	//......
    }
	@Override
    public boolean supports(Class<?> authenticationClass) {
        return return (WebToken.class
				.isAssignableFrom(authenticationClass));
    }
}

自定义AccessDecisionManager

前面有filter处理了登录问题，接下来是否可访问指定资源的问题就由FilterSecurityInterceptor来处理了。而FilterSecurityInterceptor是用了AccessDecisionManager来进行鉴权。

AccessDecisionManager的几个实现：

  • AffirmativeBased( spring security默认使用 )

只要有投通过（ACCESS_GRANTED）票，则直接判为通过。如果没有投通过票且反对（ACCESS_DENIED）票在1个及其以上的，则直接判为不通过。

  • ConsensusBased( 少数服从多数 )

通过的票数大于反对的票数则判为通过;通过的票数小于反对的票数则判为不通过;通过的票数和反对的票数相等，则可根据配置allowIfEqualGrantedDeniedDecisions（默认为true）进行判断是否通过。

  • UnanimousBased( 反对票优先 )

无论多少投票者投了多少通过（ACCESS_GRANTED）票，只要有反对票（ACCESS_DENIED），那都判为不通过;如果没有反对票且有投票者投了通过票，那么就判为通过.

实例

其自定义方式之一可以参考 聊聊spring security的role hierarchy ，展示了如何自定义AccessDecisionVoter。

自定义securityMetadataSource

主要是通过ObjectPostProcessor来实现自定义，具体实例可参考 spring security动态配置url权限

自定义access访问控制

对authorizeRequests的控制，可以使用permitAll，anonymous，authenticated，hasAuthority，hasRole等等

.antMatchers("/login","/css/**", "/js/**","/fonts/**","/file/**").permitAll()
				.antMatchers("/anonymous*").anonymous()
                .antMatchers("/session").authenticated()
                .antMatchers("/login/impersonate").hasAuthority("ROLE_ADMIN")
                .antMatchers("/admin/**").hasRole("ADMIN")
                .antMatchers("/auth/*").hasAnyRole("ADMIN","USER")

这些都是利用spring security内置的表达式。像hasAuthority等，他们内部还是使用access方法来实现的。因此我们也可以直接使用access，来实现最大限度的自定义。

实例

@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
                .authorizeRequests()
                .antMatchers("/login/**","/logout/**")
                .permitAll()
                .anyRequest().access("@authService.canAccess(request,authentication)");
    }
}

这个就有点像使用spring EL表达式，实现实例如下

@Component
public class AuthService {

    public boolean canAccess(HttpServletRequest request, Authentication authentication) {
        Object principal = authentication.getPrincipal();
        if(principal == null){
            return false;
        }

        if(authentication instanceof AnonymousAuthenticationToken){
            //check if this uri can be access by anonymous
            //return
        }

        Set<String> roles = authentication.getAuthorities()
                .stream()
                .map(e -> e.getAuthority())
                .collect(Collectors.toSet());
        String uri = request.getRequestURI();
        //check this uri can be access by this role

        return true;

    }
}

自定义authenticationEntryPoint

比如你想给basic认证换个realmName，除了再spring security配置中指定

security.basic.realm=myrealm

也可以这样

httpBasic().authenticationEntryPoint(createBasicAuthEntryPoint("myrealm"))

	public static BasicAuthenticationEntryPoint createBasicAuthEntryPoint(String realmName){
        BasicAuthenticationEntryPoint entryPoint = new BasicAuthenticationEntryPoint();
        entryPoint.setRealmName(realmName);
        return entryPoint;
    }

自定义多个WebSecurityConfigurerAdapter

spring security使用antMatchers不支持not的情况，因此可以自定义多个WebSecurityConfigurerAdapter，利用order优先级来实现匹配的覆盖，具体可以参考这篇文章 Multiple Entry Points in Spring Security


以上所述就是小编给大家介绍的《spring security自定义指南》，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对 码农网 的支持！

查看所有标签

猜你喜欢:

本站部分资源来源于网络，本站转载出于传递更多信息之目的，版权归原作者或者来源机构所有，如转载稿涉及版权问题，请联系我们。

码农书籍
The Definitive Guide to MongoDB

The Definitive Guide to MongoDB

Peter Membrey、Wouter Thielen / Apress / 2010-08-26 / USD 44.99

MongoDB, a cross-platform NoSQL database, is the fastest-growing new database in the world. MongoDB provides a rich document orientated structure with dynamic queries that you’ll recognize from RDMBS ......一起来看看 《The Definitive Guide to MongoDB》 这本书的介绍吧!

码农工具
RGB转16进制工具
RGB转16进制工具

RGB HEX 互转工具

XML 在线格式化
XML 在线格式化

在线 XML 格式化压缩工具

HEX HSV 转换工具
HEX HSV 转换工具

HEX HSV 互换工具

  • New
  • 文章
  • 话题
  • 教程
    • 关注 码农网 公众号
    版权所有，保留一切权利！© 2018-2024 码农网 粤ICP备17054400号-3