RBAC:基于角色的访问控制(Role-Based Access Control)
先在web.xml 中配置一个过滤器(必须在Struts的过滤器之前)
- <filter>
- <filter-name>springSecurityFilterChain</filter-name>
- <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
- </filter>
- <filter-mapping>
- <filter-name>springSecurityFilterChain</filter-name>
- <url-pattern>/*</url-pattern>
- </filter-mapping>
然后就是编写Spring安全的配置文件applicationContext-security.xml并配置到Spring解析的路径下
Spring Security主要做两件事,一件是认证,一件是授权。
认证
当用户访问受保护的信息却没有登录获得认证时,框架会自动将请求跳转到登录页面
在http标签中的
- <form-login login-page="/page/login.jsp" />
配置。且该登录页面必须是不被拦截的。故要配置上
- <intercept-url pattern="/page/login.jsp" filters="none" />
Web项目的认证如果在HTTP标签中配置了auto-config="true",框架就会自动的配置多8?个拦截器。
默认表单登录认证的是FORM_LOGIN_FILTER拦截器,我们可以直接写自定义的UserDetailsService,在这个类中实现方法
UserDetails loadUserByUsername(String username),从数据库获取用户信息,以及其拥有的角色。
- @Service("myUserDetailsService")
- public class MyUserDetailsServiceImpl extends BaseService implements UserDetailsService {
- @Resource
- private UserDao userDao;
- public UserDetails loadUserByUsername(String username)
- throws UsernameNotFoundException, DataAccessException {
- User user = userDao.getUserByUsername(username);
- List<Role> roles = user.getRoles();
- Collection<GrantedAuthority> authorities = new LinkedList<GrantedAuthority>();
- for (Role role : roles) {
- authorities.add(new GrantedAuthorityImpl(role.getCode()));
- }
- UserDetails userDetails = new org.springframework.security.core.userdetails.User(username,user.getPassword(),Constants.STATE_VALID.equals(user.getState()),true,true,true,authorities);
- return userDetails;
- }
- }
配置在
- <authentication-manager alias="myAuthenticationManager">
- <authentication-provider user-service-ref="myUserDetailsService">
- <password-encoder hash="md5" />
- </authentication-provider>
- </authentication-manager>
如果需要在登录的时候,在HTTP SESSION中配置做些操作的。就得配置自定义的FORM_LOGIN_FILTER了
在HTTP标签中加入
- <custom-filter ref="loginFilter" before="FORM_LOGIN_FILTER" />
并配置
- <!-- 访问控制验证器Authority -->
- <beans:bean id="securityFilter"
- class="org.springframework.security.web.access.intercept.FilterSecurityInterceptor">
- <beans:property name="authenticationManager" ref="myAuthenticationManager" />
- <beans:property name="accessDecisionManager"
- ref="affirmativeBasedAccessDecisionManager" />
- <beans:property name="securityMetadataSource" ref="mySecurityMetadataSource"/>
- </beans:bean>
MyUsernamePasswordAuthenticationFilter 类是这么写的
- public class MyUsernamePasswordAuthenticationFilter extends UsernamePasswordAuthenticationFilter{
- public static final String USERNAME = "username";
- public static final String PASSWORD = "password";
- @Resource
- private LoginService loginService;
- private UserLoginFormBean userLoginFormBean = new UserLoginFormBean();
- @Resource
- private LogService logService;
- @Override
- public Authentication attemptAuthentication(HttpServletRequest request, HttpServletResponse response) throws AuthenticationException {
- String username = obtainUsername(request);
- String password = obtainPassword(request);
- HttpSession session = request.getSession();
- userLoginFormBean.setUsername(obtainUsername(request));
- userLoginFormBean.setPassword(obtainPassword(request));
- User user = loginService.login(userLoginFormBean);
- session.setAttribute(Constants.SESSION_USER, user);
- Log log = new Log(user,getIpAddr(request),"用户登录", null);
- logService.add(log);
- //UsernamePasswordAuthenticationToken实现 Authentication
- UsernamePasswordAuthenticationToken authRequest = new UsernamePasswordAuthenticationToken(username, password);
- // Place the last username attempted into HttpSession for views
- // 允许子类设置详细属性
- setDetails(request, authRequest);
- // 运行UserDetailsService的loadUserByUsername 再次封装Authentication
- return this.getAuthenticationManager().authenticate(authRequest);
- }
- }
getAuthenticationManager().authenticate(authRequest)是为了让UserDetailService提供Detailed的信息并认证
授权
在授权时,系统默认通过FILTER_SECURITY_INTERCEPTOR认证。
如需自定义授权拦截器,我们在HTTP中在默认授权拦截器前配置了自定义的拦截器
- <custom-filter ref="securityFilter" before="FILTER_SECURITY_INTERCEPTOR" />
本平台采用基于请求URL地址的验证方式
securityFilter的配置如下
- <!-- 访问控制验证器Authority -->
- <beans:bean id="securityFilter"
- class="org.springframework.security.web.access.intercept.FilterSecurityInterceptor">
- <beans:property name="authenticationManager" ref="myAuthenticationManager" />
- <beans:property name="accessDecisionManager"
- ref="affirmativeBasedAccessDecisionManager" />
- <beans:property name="securityMetadataSource" ref="mySecurityMetadataSource"/>
- </beans:bean>
采用默认的自定义的也是采用Spring默认的FilterSecurityInterceptor拦截器,accessDecisionManager也采用的是框架提供的affirmativeBasedAccessDecisionManager
采用投票者来判断是否授权。
- <beans:bean id="affirmativeBasedAccessDecisionManager"
- class="org.springframework.security.access.vote.AffirmativeBased">
- <beans:property name="decisionVoters" ref="roleDecisionVoter" />
- </beans:bean>
- <beans:bean name="roleDecisionVoter"
- class="org.springframework.security.access.vote.RoleVoter" />
- <beans:bean id="mySecurityMetadataSource"
- class="org.springframework.security.web.access.intercept.DefaultFilterInvocationSecurityMetadataSource">
- <beans:constructor-arg
- type="org.springframework.security.web.util.UrlMatcher" ref="antUrlPathMatcher" />
- <beans:constructor-arg type="java.util.LinkedHashMap"
- ref="securityRequestMapFactoryBean" />
- </beans:bean>
SecurityMetadataSource也是ss
web框架提供的DefaultFilterInvocationSecurityMetadataSource,只是初始化参数中,一个选择
antUrl匹配,还是正则匹配,另一个是提供自定义的通过securityRequestMapFactoryBean。在后者是一个
LinkedHashMap<RequestKey,
Collection<ConfigAttribute>>类型,就是每一个URL匹配模式,所需要角色的集合。
- @Service("securityRequestMapFactoryBean")
- public class SecurityRequestMapFactoryBean extends
- LinkedHashMap<RequestKey, Collection<ConfigAttribute>> {
- @Resource
- private ModuleDao moduleDao;
- @PostConstruct
- public void loadSecurityInfos(){
- List<Module> modules = moduleDao.getAll(new Module());
- // List<Role> roles = roleDao.getAll(new Role());
- for (Module module : modules) {
- RequestKey requestKey = new RequestKey(module.getPageUrl());
- Collection<ConfigAttribute> configAttributes = new LinkedList<ConfigAttribute>();
- for (final Role role : module.getRoles()) {
- configAttributes.add(new ConfigAttribute() {
- public String getAttribute() {
- return role.getCode();
- }
- });
- }
- this.put(requestKey, configAttributes);
- }
- }
- }
PS: 最终的件applicationContext-security.xml配置文件
- <pre name="code" class="html"><?xml version="1.0" encoding="UTF-8"?>
- <beans:beans xmlns="http://www.springframework.org/schema/security"
- xmlns:beans="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
- xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
- http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security-3.0.xsd">
- <http auto-config="true">
- <intercept-url pattern="/page/login.jsp" filters="none" />
- <intercept-url pattern="/LoginAction*" filters="none" />
- <intercept-url pattern="/common/**" filters="none" />
- <intercept-url pattern="/css/**" filters="none" />
- <intercept-url pattern="/common/**" filters="none" />
- <intercept-url pattern="/images/**" filters="none" />
- <intercept-url pattern="/js/**" filters="none" />
- <form-login login-page="/page/login.jsp" />
- <custom-filter ref="loginFilter" before="FORM_LOGIN_FILTER" />
- <custom-filter ref="securityFilter" before="FILTER_SECURITY_INTERCEPTOR" />
- </http>
- <!-- 访问控制验证器Authority -->
- <beans:bean id="securityFilter"
- class="org.springframework.security.web.access.intercept.FilterSecurityInterceptor">
- <beans:property name="authenticationManager" ref="myAuthenticationManager" />
- <beans:property name="accessDecisionManager"
- ref="affirmativeBasedAccessDecisionManager" />
- <beans:property name="securityMetadataSource" ref="mySecurityMetadataSource"/>
- </beans:bean>
- <!-- 登录验证器Authentication -->
- <beans:bean id="loginFilter"
- class="com.epro.crm.util.security.MyUsernamePasswordAuthenticationFilter">
- <!-- 处理登录的action -->
- <beans:property name="filterProcessesUrl" value="/SecurityCheck" />
- <!-- 验证成功后的处理-->
- <beans:property name="authenticationSuccessHandler"
- ref="loginLogAuthenticationSuccessHandler" />
- <!-- 验证失败后的处理-->
- <beans:property name="authenticationFailureHandler"
- ref="simpleUrlAuthenticationFailureHandler" />
- <beans:property name="authenticationManager" ref="myAuthenticationManager" />
- <!-- 注入DAO为了查询相应的用户 -->
- <beans:property name="loginService" ref="loginService" />
- <beans:property name="logService" ref="logService" />
- </beans:bean>
- <authentication-manager alias="myAuthenticationManager">
- <authentication-provider user-service-ref="myUserDetailsService">
- <password-encoder hash="md5" />
- </authentication-provider>
- </authentication-manager>
- <beans:bean id="mySecurityMetadataSource"
- class="org.springframework.security.web.access.intercept.DefaultFilterInvocationSecurityMetadataSource">
- <beans:constructor-arg
- type="org.springframework.security.web.util.UrlMatcher" ref="antUrlPathMatcher" />
- <beans:constructor-arg type="java.util.LinkedHashMap"
- ref="securityRequestMapFactoryBean" />
- </beans:bean>
- <beans:bean id="antUrlPathMatcher"
- class="org.springframework.security.web.util.AntUrlPathMatcher" />
- <beans:bean id="affirmativeBasedAccessDecisionManager"
- class="org.springframework.security.access.vote.AffirmativeBased">
- <beans:property name="decisionVoters" ref="roleDecisionVoter" />
- </beans:bean>
- <beans:bean name="roleDecisionVoter"
- class="org.springframework.security.access.vote.RoleVoter" />
- <beans:bean id="loginLogAuthenticationSuccessHandler"
- class="org.springframework.security.web.authentication.SavedRequestAwareAuthenticationSuccessHandler">
- <beans:property name="defaultTargetUrl" value="/page/main.jsp"></beans:property>
- </beans:bean>
- <beans:bean id="simpleUrlAuthenticationFailureHandler"
- class="org.springframework.security.web.authentication.SimpleUrlAuthenticationFailureHandler">
- <!--
- 可以配置相应的跳转方式。属性forwardToDestination为true采用forward false为sendRedirect
- -->
- <beans:property name="defaultFailureUrl" value="/page/login.jsp"></beans:property>
- </beans:bean>
- <!-- 未登录的切入点 -->
- <beans:bean id="authenticationProcessingFilterEntryPoint"
- class="org.springframework.security.web.authentication.LoginUrlAuthenticationEntryPoint">
- <beans:property name="loginFormUrl" value="/page/login.jsp"></beans:property>
- </beans:bean>
- </beans:beans></pre><br>
- ------------------------------------------------------ 分割线 -----------------------------------------------------------------<br>
- <br>
- 后记:
- <pre></pre>
- 由于权限配置信息,是由初始化mySecurityMetadataSource时,就由mySecurityMetadataSource读取提供的权限信息,并缓存与该类的私有成员变量中,所以重新加载时就需要重新新建一个对象
- <pre></pre>
- <pre name="code" class="java">public void loadSecurityInfos(){
- this.clear();
- List<Module> modules = moduleDao.getAll(new Module());
- Collections.sort(modules);
- for (Module module : modules) {
- RequestKey requestKey = new RequestKey(module.getPageUrl());
- Collection<ConfigAttribute> configAttributes = new LinkedList<ConfigAttribute>();
- moduleDao.refresh(module);
- List<Role> roles = module.getRoles();
- if(roles != null){
- for (final Role role : roles) {
- configAttributes.add(new ConfigAttribute() {
- public String getAttribute() {
- return role.getCode();
- }
- });
- }
- }
- this.put(requestKey, configAttributes);
- log.info(module.getName()+ "模块 URL模式:" + requestKey + " 授权角色:"+ roles);
- }
- }</pre><br>
- <br>
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- <div style="padding-top:20px">
- <p style="font-size:12px;">版权声明:本文为博主原创文章,未经博主允许不得转载。</p>
- </div>