以前在PA关注过用户登录授权的过程,看过JAAS的规范,看过WEBLOGIC的实现代码,看过Spring Security的源代码,这么久都忘了。。现在开始,把以前丢掉的技术日记能记得记下来,以后也开始写日记了~~:)
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验证
使用 opends 作 ldap 数据库,(运行的脚本在该目录的 ldap.ldif 下)
上下文参数:
http://localhost:389
o=company.com.cn
cn=orcladmin
pwd: hhxxttxs
创建 ou 用的 opends 的图形工具创建, groups 下面的条目用 ldif 导入创建的, ldif 如下:
dn:cn=staffRole,ou=groups,o= company.com.cn objectClass:groupOfUniqueNames cn:staffRole uniquemember:uid=zhuoyueping790,ou=staff,ou=people,o= company.com.cn
dn:cn=clientRole,ou=groups,o= company.com.cn objectClass:groupOfUniqueNames cn:clientRole uniquemember:uid=chenshengli532,ou=client,ou=people,o= company.com.cn |
有 staffRole 角色的用户可以访问 /staff.* 资源;
有 clientRole 角色的用户可以访问 /client.* 资源
例子中所有密码均为: hhxxttxs
所有标有页数的地方为《敏捷 Acegi 、 CAS ——构建安全的 java 系统》的页码。
红色 表示待解决的问题,蓝色 表示有特别说明或者代码解释的语句。
该项目的全部文件(包括 jar 包,在该目录下的 ss 目录中)
斜体 bena 的名字 表示即将要解释的调用的 bean.
web.xml
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
org.springframework.web.context.ContextLoaderListener 《1 》
org.springframework.security.util.FilterToBeanProxy 《2 》
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《1 》:org.springframework.web.context.ContextLoaderListener
( 该类在 spring-web.jar 包中, )
《2 》:org.springframework.util.FilterToBeanProxy: 如果配置了targetBean 和targetClass, 优先调用targetHean. 推荐使用targetHean 的方式。
通过调用FilterToBeanProxy 的init ()方法启动过滤器链工作。
( org.springframework.security.* 的类都 在 spring-security-core.jar 包中, )
public class FilterToBeanProxy implements Filter{ public void init(FilterConfig filterConfig) throws ServletException { this.filterConfig = filterConfig; String strategy = filterConfig.getInitParameter("init"); if ((strategy != null) && (strategy.toLowerCase().equals("lazy"))) { return; } doInit(); } } public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { if (!(this.initialized)) { doInit(); } }
private synchronized void doInit() throws ServletException { //… String targetBean = this.filterConfig.getInitParameter("targetBean"); // 关于 lifecircle 部分,先放在这里以后补充 String lifecycle = this.filterConfig.getInitParameter("lifecycle"); if ("servlet-container-managed".equals(lifecycle)) { this.servletContainerManaged = true; } ApplicationContext ctx = getContext(this.filterConfig); String beanName = null;
if ((targetBean != null) && (ctx.containsBean(targetBean))) { beanName = targetBean; } else { Class targetClass; if (targetBean != null) { throw new ServletException("targetBean '" + targetBean + "' not found in context"); } String targetClassString = this.filterConfig.getInitParameter("targetClass"); //… targetClass= Thread.currentThread().getContextClassLoader().loadClass(targetClassString); //.. this.initialized = true; // 得到代理类,代理类必须是 filter 类,调用代理类的 init () Object object = ctx.getBean(beanName); if (!(object instanceof Filter)) { throw new ServletException("Bean '" + beanName + "' does not implement javax.servlet.Filter"); } this.delegate = ((Filter)object); if (this.servletContainerManaged) {
// 启动代理 filter 的 init 方法 this.delegate.init(this.filterConfig); } }
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/WEB-INF/applicationContextsecurity.xml :
配置 bean : filterChainProxy
class="org.springframework.security.util.FilterChainProxy "> 《3 》 PATTERN_TYPE_APACHE_ANT /**=httpSessionContextIntegrationFilter,authenticationProcessingFilter,exceptionTranslationFilter,filterInvocationInterceptor
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《4 》给该参数配置过滤器链。
《3 》org.springframework.security.util.FilterChainProxy
/** 表示要过该链的url 为all
public class FilterChainProxy implements Filter, InitializingBean, ApplicationContextAware{ public void init (FilterConfig filterConfig) throws ServletException { Filter[] filters = obtainAllDefinedFilters(); for (int i = 0; i < filters.length; ++i) filters[i].init(filterConfig);// 依次调用每个 filter 的过滤器链 } } } //destroy 也相同,调用每个 filter 的 destroy
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { FilterInvocation fi = new FilterInvocation(request, response, chain); List filters = getFilters(fi.getRequestUrl()); if ((filters == null) || (filters.size() == 0)) { chain.doFilter(request, response); return; } virtualFilterChain virtualFilterChain = new VirtualFilterChain(fi, filters, null); virtualFilterChain.doFilter(fi.getRequest(), fi.getResponse()); } } |
下面依次是过滤器链中的过滤器。
配置 bean : httpSessionContextIntegrationFilter
集成过滤器 ,P49, 如名字所示,将httpSession 与securityContext 中的认证信息同步。
class="org.springframework.security.context.HttpSessionContextIntegrationFilter "> 《 5 》
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《 5 》 HttpSessionContextIntegrationFilter 继承 SpringSecurityFilter , SpringSecurityFilter 实现了接口 filter ,在 SpringSecurityFilter 【附 1 】的 doFilter 方法中调用了 doFilterHttp ,子类在 doFilterHttp 中实现自己的逻辑,该过滤器应该放在所有过滤器之前。
《 6 》 allowSessionCreation 是否创建 HTTP session 。
public class HttpSessionContextIntegrationFilter extends SpringSecurityFilter implements InitializingBean{ public void doFilterHttp (HttpServletRequest request, HttpServletResponse response, FilterChain chain){ public void doFilterHttp(HttpServletRequest request, HttpServletResponse response, FilterChain chain) throws IOException, ServletException { // 进入该过滤器器,从 session 中取认证相关信息,放在 SecurityContext 中。 SecurityContext contextBeforeChainExecution = readSecurityContextFromSession(httpSession); SecurityContextHolder.setContext(contextBeforeChainExecution); // 继续执行过滤器链,因此,该过滤器应该放在所有过滤器之前! chain.doFilter(request, responseWrapper);
//… // 在 finally 中执行,退出出这个过滤器(也是该过滤器链执行完后)前执行。 // 在 contextAfterChainExecution 存最新的 SecurityContext SecurityContext contextAfterChainExecution = SecurityContextHolder.getContext();
SecurityContextHolder.clearContext();// 清除当前线程中的 SecurityContext 相关信息。 request.removeAttribute("__spring_security_session_integration_filter_applied"); // 将 contextAfterChainExecution 修改过的 securitycontext 放在 HTTP session 对象中 if (!(responseWrapper.isSessionUpdateDone())) { storeSecurityContextInSession(contextAfterChainExecution , request, httpSessionExistedAtStartOfRequest, contextHashBeforeChainExecution); } } }
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配置 bean : authenticationProcessingFilter
* 认证处理过滤器 。
class="org.springframework.security.ui.webapp.AuthenticationProcessingFilter">
— org.springframework.security.ui.webapp.AuthenticationProcessingFilter : 表示用表单认证的类; authenticationFailureUrl: 认证失败跳转的 url 。 defaultTargetUrl :认证完成后,跳转回之前请求的页面,如果没有,到该 url filterProcessesUrl :提交验证请求的 form 标签中 action 的地址 authenticationManager :处理得到的用户名和密码交给谁验证的问题 -->
class="org.springframework.security.providers.ProviderManager">p50
— providers :可以指定多个 provider 的 bean 。 -->
class="org.springframework.security.providers.ldap.LdapAuthenticationProvider">
— org.springframework.security.providers.ldap.LdapAuthenticationProvider : 指定该 bean 是去 ldap 认证。 -->
class="org.springframework.security.providers.ldap.authenticator.BindAuthenticator">
ref="ldapUserDetailsMapper ">
— initialDirContextFactory 有错,主要原因是包的依赖关系有问题,待解决。 -->
class="org.springframework.security.ldap.DefaultInitialDirContextFactory"> value="com.sun.jndi.ldap.LdapCtxFactory" />
class="org.springframework.security.userdetails.ldap.LdapUserDetailsMapper">
class="org.springframework.security.providers.ldap.populator.DefaultLdapAuthoritiesPopulator">
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配置 bean : exceptionTranslationFilter
异常处理器:处理认证和授权过程中的异常
class="org.springframework.security.ui.ExceptionTranslationFilter">
p173-->
class="org.springframework.security.ui.webapp.AuthenticationProcessingFilterEntryPoint">
继承自 AuthenticationEntryPoint p17 AuthenticationEntryPoint 的 commence(ServletRequest request, ServletResponse response, AuthenticationException authException) 构造验证入口。 -->
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配置 bean : filterInvocationInterceptor
过滤安全拦截器:处理认证和授权过程中的异常
class="org.springframework.security.intercept.web.FilterSecurityInterceptor">
PATTERN_TYPE_APACHE_ANT /client/*=ROLE_CLIENTROLE /staff/*=ROLE_staffRole
class="org.springframework.security.vote.AffirmativeBased">
class="org.springframework.security.vote.RoleVoter" /> |
附:一些类。
附 1 :
public abstract class SpringSecurityFilter implements Filter, Ordered { protected final Log logger; public SpringSecurityFilter() { this.logger = LogFactory.getLog(super.getClass()); } public final void init(FilterConfig filterConfig) throws ServletException { } public final void destroy() { } public final void doFilter (ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { if (!(request instanceof HttpServletRequest)) { throw new ServletException("Can only process HttpServletRequest"); } if (!(response instanceof HttpServletResponse)) { throw new ServletException("Can only process HttpServletResponse"); } doFilterHttp ((HttpServletRequest)request, (HttpServletResponse)response, chain); } protected abstract void doFilterHttp (HttpServletRequest paramHttpServletRequest, HttpServletResponse paramHttpServletResponse, FilterChain paramFilterChain) throws IOException, ServletException; public String toString() { return super.getClass() + "[ order=" + super.getOrder() + "; ]"; } public abstract int getOrder(); } |
/WEB-INF/applicationContextsecurity.xml
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:jee="http://www.springframework.org/schema/jee" xmlns:jms="http://www.springframework.org/schema/jms" xmlns:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee.xsd http://www.springframework.org/schema/jms http://www.springframework.org/schema/jms/spring-jms.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
class="org.springframework.security.context.HttpSessionContextIntegrationFilter">
— 下一个bean (initialDirContextFactory )有错,主要原因是包的依赖关系有问题,待解决。 -->
class="org.springframework.security.ldap.DefaultInitialDirContextFactory"> value="com.sun.jndi.ldap.LdapCtxFactory" />
ref="ldapUserDetailsMapper">
class="org.springframework.security.providers.ProviderManager">
class="org.springframework.security.ui.ExceptionTranslationFilter">
class="org.springframework.security.vote.RoleVoter" />
class="org.springframework.security.vote.AffirmativeBased">
class="org.springframework.security.intercept.web.FilterSecurityInterceptor">
PATTERN_TYPE_APACHE_ANT /client/*=ROLE_CLIENTROLE /staff/*=ROLE_staffRole
class="org.springframework.security.util.FilterChainProxy"> PATTERN_TYPE_APACHE_ANT /**=httpSessionContextIntegrationFilter,authenticationProcessingFilter,exceptionTranslationFilter,filterInvocationInterceptor
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