详解spring security四种实现方式

spring security实现方式大致可以分为这几种：

    1.配置文件实现，只需要在配置文件中指定拦截的url所需要权限、配置userDetailsService指定用户名、密码、对应权限，就可以实现。

    2.实现UserDetailsService，loadUserByUsername(String userName)方法，根据userName来实现自己的业务逻辑返回UserDetails的实现类，需要自定义User类实现UserDetails，比较重要的方法是getAuthorities()，用来返回该用户所拥有的权限。

    3.通过自定义filter重写spring security拦截器，实现动态过滤用户权限。

    4.通过自定义filter重写spring security拦截器，实现自定义参数来检验用户，并且过滤权限。

1.最简单配置spring-security.xml，实现1

2.实现UserDetailsService

先整理下spring secruity验证流程：

springSecurity的登录验证是由org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter这个过滤器来完成的,在该类的父类AbstractAuthenticationProcessingFilter中有一个AuthenticationManager接口属性,验证工作主要是通过这个AuthenticationManager接口的实例来完成的。在默认情况下，springSecurity框架会把org.springframework.security.authentication.ProviderManager类的实例注入到该属性

UsernamePasswordAuthenticationFilter的验证过程如下：

1. 首先过滤器会调用自身的attemptAuthentication方法，从request中取出authentication, authentication是在org.springframework.security.web.context.SecurityContextPersistenceFilter过滤器中通过捕获用户提交的登录表单中的内容生成的一个org.springframework.security.core.Authentication接口实例.

2. 拿到authentication对象后，过滤器会调用ProviderManager类的authenticate方法，并传入该对象

3.ProviderManager类的authenticate方法中会调用类中的List providers集合中的各个AuthenticationProvider接口实现类中的authenticate(Authentication authentication)方法进行验证，由此可见，真正的验证逻辑是由各个AuthenticationProvider接口实现类来完成的。DaoAuthenticationProvider类是默认情况下注入的一个AuthenticationProvider接口实现类

4.provider的实现类在验证用户时，会调用userDetailsService的实现类的loadUserByUsername方法来获取用户信息，

首先spring-security配置文件

userDetailsService实现：

/**
 * 
 */
package com.ultrapower.me.util.security.support;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.dao.DataAccessException;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;

import com.ultrapower.me.util.Constants;
import com.ultrapower.me.util.dbDao.SpringBeanUtil;
import com.ultrapower.me.util.security.SecurityManager;
import com.ultrapower.me.util.security.entity.Resource;
import com.ultrapower.me.util.security.entity.Role;
import com.ultrapower.me.util.security.entity.User;
import com.ultrapower.me.util.task.PasswordUtils;


public class SecurityManagerSupport implements UserDetailsService{
 private  Log  log  = LogFactory.getLog(this.getClass().getName()); 
   

 public UserDetails loadUserByUsername(String userName) throws UsernameNotFoundException, DataAccessException {
//    List users = getHibernateTemplate().find("FROM User user WHERE user.name = ? AND user.disabled = false", userName);
   log.info("SecurityManagerSupport.loadUserByUsername.userName:"+userName);
   
   User user =null;
   if("admin".equals(userName)){  
     Set roles = new HashSet() ;
   Role role = new Role();
   role.setRoleid("ROLE_USER");
   role.setRoleName("ROLE_USER");
   
   Set resources=new HashSet() ;
   
   Resource res = new Resource();
   res.setResid("ME001");
   res.setResName("首页");
   res.setResUrl("/jsp/index/main.jsp");
   res.setType("ROLE_USER");
   res.setRoles(roles);
   resources.add(res);
   
   role.setResources(resources);
   
   roles.add(role);
     user = new User();
   user.setAccount("admin");
   user.setDisabled(false);
   user.setPassword(PasswordUtils.entryptPassword(Constants.securityKey));
   log.info(user.getPassword());
   user.setRoles(roles);   
   }
   return user;//返回UserDetails的实现user不为空，则验证通过
  }
  
}

UserDetails实现：

/**
 * 
 */
package com.ultrapower.me.util.security.entity;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.commons.lang.StringUtils;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;

 
public class User implements UserDetails {
 
 private static final long serialVersionUID = 8026813053768023527L;

  
 private String account;
 
 private String name;
 
 private String password;
 
 private boolean disabled;
 
 private Set roles;
 
 
 private Map> roleResources;
 
 /**
 * The default constructor
 */
 public User() {
 
 }
 
 /**
 * Returns the authorites string
 * 
 * eg. 
 *  downpour --- ROLE_ADMIN,ROLE_USER
 *  robbin --- ROLE_ADMIN
 * 
 * @return
 */
 public String getAuthoritiesString() {
   List authorities = new ArrayList();
   for(GrantedAuthority authority : this.getAuthorities()) {
     authorities.add(authority.getAuthority());
   }
   return StringUtils.join(authorities, ",");
 }

 @Override
 public Collection getAuthorities() {
 // 根据自定义逻辑来返回用户权限，如果用户权限返回空或者和拦截路径对应权限不同，验证不通过
 if(!roles.isEmpty()){
  List list = new ArrayList();
  GrantedAuthority au = new SimpleGrantedAuthority("ROLE_USER");
  list.add(au);
  return list;
 }
 return null;
 }

 /* 
 * 密码
 */
 public String getPassword() {
 return password;
 }

 /* 
 * 用户名
 */
 public String getUsername() {
 return name;
 }

 /* 
 *帐号是否不过期，false则验证不通过
 */
 public boolean isAccountNonExpired() {
 return true;
 }

 /* 
 * 帐号是否不锁定，false则验证不通过
 */
 public boolean isAccountNonLocked() {
 return true;
 }

 /* 
 * 凭证是否不过期，false则验证不通过
 */
 public boolean isCredentialsNonExpired() {
 return true;
 }

 /* 
 * 该帐号是否启用，false则验证不通过
 */
 public boolean isEnabled() {
 return !disabled;
 }

 

 /**
 * @return the name
 */
 public String getName() {
 return name;
 }

 /**
 * @return the disabled
 */
 public boolean isDisabled() {
 return disabled;
 }

 /**
 * @return the roles
 */
 public Set getRoles() {
 return roles;
 }

 /**
 * @return the roleResources
 */
 public Map> getRoleResources() {
 // init roleResources for the first time
 System.out.println("---------------------------------------------------");
 if(this.roleResources == null) {
  
  this.roleResources = new HashMap>();
  
  for(Role role : this.roles) {
  String roleName = role.getRoleName();
  Set resources = role.getResources();
  for(Resource resource : resources) {
   String key = roleName + "_" + resource.getType();
   if(!this.roleResources.containsKey(key)) {
   this.roleResources.put(key, new ArrayList());
   }
   this.roleResources.get(key).add(resource);   
  }
  }
  
 }
 return this.roleResources;
 }

 
 /**
 * @param name the name to set
 */
 public void setName(String name) {
 this.name = name;
 }

 /**
 * @param password the password to set
 */
 public void setPassword(String password) {
 this.password = password;
 }

 /**
 * @param disabled the disabled to set
 */
 public void setDisabled(boolean disabled) {
 this.disabled = disabled;
 }

 /**
 * @param roles the roles to set
 */
 public void setRoles(Set roles) {
 this.roles = roles;
 }

 public String getAccount() {
 return account;
 }

 public void setAccount(String account) {
 this.account = account;
 }

 public void setRoleResources(Map> roleResources) {
 this.roleResources = roleResources;
 }
 
}

3.实现动态过滤用户权限

在spring-security配置文件的http标签中添加如下配置

在spring-security配置文件中添加如下配置 

securityInterceptor继承AbstractSecurityInterceptor过滤器，实现Filter过滤器

package com.ultrapower.me.util.security.interceptor;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import org.springframework.security.access.SecurityMetadataSource;
import org.springframework.security.access.intercept.AbstractSecurityInterceptor;
import org.springframework.security.access.intercept.InterceptorStatusToken;
import org.springframework.security.web.FilterInvocation;
import org.springframework.security.web.access.intercept.FilterInvocationSecurityMetadataSource;

public class SecurityInterceptor extends AbstractSecurityInterceptor implements Filter{

 //配置文件注入
  private FilterInvocationSecurityMetadataSource securityMetadataSource;
 
 public FilterInvocationSecurityMetadataSource getSecurityMetadataSource() {
 return securityMetadataSource;
 }

 public void setSecurityMetadataSource(
  FilterInvocationSecurityMetadataSource securityMetadataSource) {
 this.securityMetadataSource = securityMetadataSource;
 }

 @Override
 public void doFilter(ServletRequest request, ServletResponse response,
  FilterChain chain) throws IOException, ServletException {
 // TODO Auto-generated method stub\
 
 FilterInvocation fi = new FilterInvocation(request, response, chain);
 //fi里面有一个被拦截的url
    //里面调用MyInvocationSecurityMetadataSource的getAttributes(Object object)这个方法获取fi对应的所有权限
    //再调用MyAccessDecisionManager的decide方法来校验用户的权限是否足够
    InterceptorStatusToken token = super.beforeInvocation(fi);
    try {
     //执行下一个拦截器
     fi.getChain().doFilter(fi.getRequest(), fi.getResponse());  
    } finally { 
      super.afterInvocation(token, null); 
    }  
 
 }

 @Override
 public void init(FilterConfig arg0) throws ServletException {
 // TODO Auto-generated method stub
 
 }

 @Override
 public Class getSecureObjectClass() {
 // TODO Auto-generated method stub
 return FilterInvocation.class; 
 }

 @Override
 public SecurityMetadataSource obtainSecurityMetadataSource() {
 // TODO Auto-generated method stub
 return this.securityMetadataSource;  
 }

 @Override
 public void destroy() {
 // TODO Auto-generated method stub
 }
}

登陆后，每次访问资源都会被这个拦截器拦截，会执行doFilter这个方法，这个方法调用了invoke方法，其中fi断点显示是一个url（可能重写了toString方法吧，但是里面还有一些方法的），最重要的是beforeInvocation这个方法，它首先会调用MyInvocationSecurityMetadataSource类的getAttributes方法获取被拦截url所需的权限，在调用MyAccessDecisionManager类decide方法判断用户是否够权限。弄完这一切就会执行下一个拦截器。

secureResourceFilterInvocationDefinitionSource实现

/**
 * 
 */
package com.ultrapower.me.util.security.interceptor;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import javax.servlet.ServletContext;

import org.springframework.beans.factory.InitializingBean;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.access.SecurityConfig;
import org.springframework.security.web.FilterInvocation;
import org.springframework.security.web.access.intercept.FilterInvocationSecurityMetadataSource;
import org.springframework.util.AntPathMatcher;
import org.springframework.util.PathMatcher;


public class SecureResourceFilterInvocationDefinitionSource implements FilterInvocationSecurityMetadataSource, InitializingBean {
  
  private PathMatcher matcher;
  
  private static Map> map = new HashMap>();

  /* 
   * 初始化用户权限，为了简便操作没有从数据库获取
   * 实际操作可以从数据库中获取所有资源路径url所对应的权限
   */
  public void afterPropertiesSet() throws Exception {
    this.matcher = new AntPathMatcher();//用来匹配访问资源路径
    Collection atts = new ArrayList(); 
    ConfigAttribute ca = new SecurityConfig("ROLE_USER");
    atts.add(ca); 
    map.put("/jsp/index/main.jsp", atts); 
    Collection attsno =new ArrayList();
    ConfigAttribute cano = new SecurityConfig("ROLE_NO");
    attsno.add(cano);
    map.put("/http://blog.csdn.net/u012367513/article/details/other.jsp", attsno);  
  }
  
   

  @Override
 public Collection getAttributes(Object object)
  throws IllegalArgumentException {
 // TODO Auto-generated method stub
   FilterInvocation filterInvocation = (FilterInvocation) object;
   
   String requestURI = filterInvocation.getRequestUrl();
   //循环资源路径，当访问的Url和资源路径url匹配时，返回该Url所需要的权限
    for(Iterator>> iter = map.entrySet().iterator(); iter.hasNext();) {
      Map.Entry> entry = iter.next();
      String url = entry.getKey();
      
      if(matcher.match(url, requestURI)) {
        return map.get(requestURI);
      }
    }
   
 return null;
 }

 @Override
 public Collection getAllConfigAttributes() {
 // TODO Auto-generated method stub
 return null;
 }

 /* (non-Javadoc)
   * @see org.springframework.security.intercept.ObjectDefinitionSource#getConfigAttributeDefinitions()
   */
 @SuppressWarnings("rawtypes")
 public Collection getConfigAttributeDefinitions() {
    return null;
  }

  /* (non-Javadoc)
   * @see org.springframework.security.intercept.ObjectDefinitionSource#supports(java.lang.Class)
   */
 public boolean supports(@SuppressWarnings("rawtypes") Class clazz) {
    return true;
  }
  
  /**
   * 
   * @param filterInvocation
   * @return
   */
  @SuppressWarnings("unchecked")
 private Map getUrlAuthorities(org.springframework.security.web.FilterInvocation filterInvocation) {
    ServletContext servletContext = filterInvocation.getHttpRequest().getSession().getServletContext();
    return (Map)servletContext.getAttribute("urlAuthorities");
  }

}

mesecurityAccessDecisionManager实现

package com.ultrapower.me.util.security.interceptor;

import java.util.Collection;
import java.util.Iterator;

import org.springframework.security.access.AccessDecisionManager;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.access.SecurityConfig;
import org.springframework.security.authentication.InsufficientAuthenticationException;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;

public class SecurityAccessDecisionManager implements AccessDecisionManager {
  
 /**
 * 检查用户是否够权限访问资源
 * authentication 是从spring的全局缓存SecurityContextHolder中拿到的，里面是用户的权限信息
 * object 是url
 * configAttributes 所需的权限
 * @see org.springframework.security.access.AccessDecisionManager#decide(org.springframework.security.core.Authentication, java.lang.Object, java.util.Collection)
 */
 @Override
 public void decide(Authentication authentication, Object object,
  Collection configAttributes)
  throws AccessDeniedException, InsufficientAuthenticationException {
 // 对应url没有权限时，直接跳出方法
  if(configAttributes == null){ 
      return;    
    } 
    
    Iterator ite=configAttributes.iterator();
    //判断用户所拥有的权限，是否符合对应的Url权限，如果实现了UserDetailsService，则用户权限是loadUserByUsername返回用户所对应的权限
    while(ite.hasNext()){
      ConfigAttribute ca=ite.next(); 
      String needRole=((SecurityConfig)ca).getAttribute();
      for(GrantedAuthority ga : authentication.getAuthorities()){ 
      System.out.println(":::::::::::::"+ga.getAuthority());
        if(needRole.equals(ga.getAuthority())){ 
          return;       
        }      
      }   
    } 
    //注意：执行这里，后台是会抛异常的，但是界面会跳转到所配的access-denied-page页面
    throw new AccessDeniedException("no right"); 
 }
 @Override
 public boolean supports(ConfigAttribute attribute) {
 return true;
 }
 @Override
 public boolean supports(Class clazz) {
 return true;
 }

}

4.实现AuthenticationProvider，自定义参数验证

这种验证以前项目用过，现在没有写示例代码，先写下大概流程和需要用到的类

这种验证的好处：可以在自定义登录界面添加登录时需要的参数，如多个验证码等、可以修改默认登录名称和密码的参数名

整体流程：

1.用户登录时，先经过自定义的passcard_filter过滤器，该过滤器继承了AbstractAuthenticationProcessingFilter，并且绑定了登录失败和成功时需要的处理器(跳转页面使用)

2.执行attemptAuthentication方法，可以通过request获取登录页面传递的参数，实现自己的逻辑，并且把对应参数set到AbstractAuthenticationToken的实现类中

3.验证逻辑走完后，调用 this.getAuthenticationManager().authenticate(token);方法，执行AuthenticationProvider的实现类的supports方法

4.如果返回true则继续执行authenticate方法

5.在authenticate方法中，首先可以根据用户名获取到用户信息，再者可以拿自定义参数和用户信息做逻辑验证，如密码的验证

6.自定义验证通过以后，获取用户权限set到User中，用于springSecurity做权限验证

7.this.getAuthenticationManager().authenticate(token)方法执行完后，会返回Authentication，如果不为空，则说明验证通过

8.验证通过后，可实现自定义逻辑操作，如记录cookie信息

9.attemptAuthentication方法执行完成后，由springSecuriy来进行对应权限验证，成功于否会跳转到相对应处理器设置的界面。

1.自定义PassCardAuthenticationToken类，继承AbstractAuthenticationToken类，用于定义参数，需要实现的方法

/**
 * 凭证，用户密码
 */
 @Override
 public Object getCredentials() {
 return password;
 }

 /**
 * 当事人，登录名 用户Id
 */
 @Override
 public Object getPrincipal() {
 return userID;
 }

2.User类要实现Authentication，需要实现的方法

/**
 * 返回用户所属权限
 */
 @Override
 public Collection getAuthorities() {
 return this.accesses;
 }
 
 @Override
 public Object getCredentials() {
 return null;
 }
 @Override
 public Object getDetails() {
 return null;
 }
 /**
 * 登录名称
 */
 @Override
 public Object getPrincipal() {
 return loginName;
 }
 /**
 * 是否认证
 */
 @Override
 public boolean isAuthenticated() {
 return this.authenticated;
 }
 /**
 * 设置是否认证字段
 */
 @Override
 public void setAuthenticated(boolean isAuthenticated)
  throws IllegalArgumentException {
 this.authenticated=isAuthenticated;
 }

3.需要userService实现AuthenticationProvider的 authenticate(Authentication authentication)方法

  @SuppressWarnings("unchecked")
 @Override
 public Authentication authenticate(Authentication authentication)
  throws AuthenticationException {
 PassCardAuthenticationToken token=(PassCardAuthenticationToken)authentication;
 /*
  * 这里进行逻辑认证操作，可以获取token中的属性来自定义验证逻辑，代码验证逻辑可以不用管
  * 如果使用UserDetailsService的实现类来验证，就只能获取userName，不够灵活
  */
 if(token.getUserID()!=null&&token.getPassword()!=null){
  User user=(User)this.getDao().executeQueryUnique("User.loadByLoginName", QueryCmdType.QUERY_NAME, token.getUserID());
  
  String password=token.getPassword();
  if(this.passwordEncoder!=null){
  password=this.passwordEncoder.encodePassword(password, null);
  }
  
  if(!password.equalsIgnoreCase(user.getPassword())){
  
  token.setErrCode("2");
  return null;
  }
  
  if( token.isEnablePasscard() && usePassCard ){//token中激活密码卡且系统使用密码卡
  
  int position1=((token.getRow1()-1)*7)+token.getColumn1();
  int position2=((token.getRow2()-1)*7)+token.getColumn2();
  //System.out.println( "---pos:"+position1+"---"+position2 );
  
  if(user.getPassCardId()==null){
   token.setErrCode("10");
   return null;
  }
  PassCard passcard=this.passCardDao.findById(user.getPassCardId(), false);
   
  if(passcard==null||passcard.getStatus()==PassCardHelper.STATUS_CANCEL ){
   token.setErrCode("10");
   return null;
  }
  if(passcard.getConfusedContent()==null || passcard.getConfusedContent().length()<7*7*32 ){
   token.setErrCode("10");
   return null;
  }
  
  String content=passcard.getConfusedContent();
  int perLen=content.length()/49;
  String str1=content.substring((position1-1)*perLen, position1*perLen);
  String str2=content.substring((position2-1)*perLen, position2*perLen);
  String inputStr1=token.getCard1();
  String inputStr2=token.getCard2();
  if(this.passwordEncoder!=null){
   inputStr1 = md5.getMD5ofStr(md5.getMD5ofStr(inputStr1));
   inputStr2 = md5.getMD5ofStr(md5.getMD5ofStr(inputStr2));
  }
  
  if((!str1.equalsIgnoreCase(inputStr1))||(!str2.equalsIgnoreCase(inputStr2))){
   token.setErrCode("10");
   return null;
  }
  }
  user.setLastIp(token.getIp());
  user.setLastLogin(new Date());
  this.getDao().saveOrUpdate(user);  
  user.setAuthenticated(true);
  /*
  * 导入一次角色权限，并且把权限set到User中，用于spring验证用户权限(getAuthorities方法)
  */
  List userRoles=(List)this.getDao().executeQueryList("UserRole.listRoleByUserID", QueryCmdType.QUERY_NAME, -1, -1, user.getId());
  Set accesses=new HashSet();
  for(UserRole ur:userRoles){
  accesses.add(ur.getRole());  
  }
  user.getOrg().getOrgName();
  if(user.getOrg().getCertTypes()!=null) user.getOrg().getCertTypes().size();//延迟载入一下
  user.setAccesses(accesses);
  return user;
 }
 return null;
 }

重写supports(Class authentication)方法，authentication要

/**
 * 如果此处验证不通过，是不会执行authentication方法的
 */
 @Override
 public boolean supports(Class authentication) {
 return authentication.equals(PassCardAuthenticationToken.class);
 }

4.定义filter，实现AbstractAuthenticationProcessingFilter的attemptAuthentication方法，用于获取在登录页面传递过来的参数，spring默认只获取userName(j_username)，password(j_username)，而且实现UserDetailsService时只传递username

import java.io.IOException;
import java.util.Date;

import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.log4j.Logger;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter;
import org.springframework.util.StringUtils;

import cn.edu.jszg.cert.user.UserLog;
import cn.edu.jszg.cert.user.UserLogService;
import cn.edu.jszg.cert.web.WebApplicationConfiguration;
import cn.edu.jszg.cert.web.controller.portal.auth.RemoteDataValidator;

import com.google.code.kaptcha.servlet.KaptchaServlet;

public class PasscardAuthenticationProcessingFilter extends
 AbstractAuthenticationProcessingFilter {
 private String successPage = "/home/admin/index";
 private String failurePage = "/public/adminLoginEntry";
 private boolean forward = false;
 private boolean useVerifyCode=true;
 private String certLoginUrl;
 
 static Logger logger = Logger.getLogger(PasscardAuthenticationProcessingFilter.class);
 
 private WebApplicationConfiguration config;
 private UserLogService userLogService; 
 
 public void setConfig(WebApplicationConfiguration config) {
 this.config = config;
 }

 /**
 * 实现AbstractAuthenticationProcessingFilter的有参构造
 * 没记错的话，相当于该filter的访问路径 
 */
 protected PasscardAuthenticationProcessingFilter() {
 super("/adminLoginCheck");
 }

 public void setUseVerifyCode(boolean useVerifyCode) {
 this.useVerifyCode = useVerifyCode;
 }

 public void setUserLogService(UserLogService userLogService) {
 this.userLogService = userLogService;
 }
 
 public boolean validate(HttpServletRequest request) {
 String userId = request.getParameter("username");
 String md2 = request.getParameter("m");
 String l = request.getParameter("l");
 if (userId == null || md2 == null || l == null) {
  return false;
 }
 long longTime = Long.parseLong(l);
 if (longTime < new Date().getTime()) {
  return false;
 }

 
 try {
  String md1 = RemoteDataValidator.genExamMd5Digest(userId, longTime);
  if (md1.equals(md2))
  return true;
  
 } catch (Exception e) {  
  //e.printStackTrace();
 }
 
 return false;
 }

 /**
 * 可以通过request获取页面传递过来的参数，并且set到相应的token中
 */
 @Override
 public Authentication attemptAuthentication(HttpServletRequest request,
  HttpServletResponse response) throws AuthenticationException,
  IOException, ServletException {
 
// logger.warn("-----------------start证书登录用户----------");
 HttpSession s = request.getSession(true);
 PassCardAuthenticationToken token = new PassCardAuthenticationToken();
 
 String verifyCode = request.getParameter("verifyCode");
 String userID = request.getParameter("username");
 //....此处省略获取参数，并且验证、赋值的逻辑
 Authentication auth = null;
 
 try {
  //此处调用getAuthenticationManager的authenticate方法，当supports方法返回true时执行authenticate方法
  auth = this.getAuthenticationManager().authenticate(token);
  
  //此处为登录成功后，相应的处理逻辑
  if (auth == null || !auth.isAuthenticated()) {
  s.setAttribute("__login_error", token.getErrCode());
  } else {
  s.removeAttribute("__login_error");
  s.removeAttribute("__login_username");
  s.removeAttribute("__cert_userid");
  if( token.isEnablePasscard()) {
   s.removeAttribute("__passcard_row1");
   s.removeAttribute("__passcard_row2");
   s.removeAttribute("__passcard_column1");
   s.removeAttribute("__passcard_column2");
  }
  }
 } catch (AuthenticationException e) {
  s.setAttribute("__login_error", token.getErrCode());
  throw e;
 }
 
 
 return auth;
 }

 public void setSuccessPage(String successPage) {
 this.successPage = successPage;
 }

 public void setFailurePage(String failurePage) {
 this.failurePage = failurePage;
 }

 public void setForward(boolean forward) {
 this.forward = forward;
 }

 public void setCertLoginUrl(String certLoginUrl) {
 this.certLoginUrl = certLoginUrl;
 }

 @Override
 public void afterPropertiesSet() {
 super.afterPropertiesSet();
 /*
 *该处理器实现了AuthenticationSuccessHandler, AuthenticationFailureHandler
 *用于处理登录成功或者失败后，跳转的界面
 */
 AuthenticationResultHandler handler = new AuthenticationResultHandler();
 handler.setForward(forward);
 handler.setLoginFailurePage(failurePage);
 handler.setLoginSuccessPage(successPage);
 handler.setCertLoginUrl(certLoginUrl);
 //设置父类中的处理器
 this.setAuthenticationSuccessHandler(handler);
 this.setAuthenticationFailureHandler(handler);

 }

}

最后为spring-security配置文件中的配置，需要添加authentication-provider的引用，和filter的配置

还要在http中添加

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