cas與jeesite結合（二）

1、jeesite使用shrio來進項權限和認證處理。

2、創建自己的認證系統，將cas認證加載進來

 

import java.net.URLDecoder;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.commons.lang3.StringUtils;
import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.SimpleAuthenticationInfo;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.cas.CasAuthenticationException;
import org.apache.shiro.cas.CasRealm;
import org.apache.shiro.cas.CasToken;
import org.apache.shiro.session.Session;
import org.apache.shiro.subject.PrincipalCollection;
import org.apache.shiro.subject.SimplePrincipalCollection;
import org.jasig.cas.client.authentication.AttributePrincipal;
import org.jasig.cas.client.validation.Assertion;
import org.jasig.cas.client.validation.TicketValidationException;
import org.jasig.cas.client.validation.TicketValidator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.thinkgem.jeesite.common.config.Global;
import com.thinkgem.jeesite.common.utils.SpringContextHolder;
import com.thinkgem.jeesite.common.web.Servlets;
import com.thinkgem.jeesite.modules.sys.entity.Menu;
import com.thinkgem.jeesite.modules.sys.entity.Role;
import com.thinkgem.jeesite.modules.sys.entity.User;
import com.thinkgem.jeesite.modules.sys.security.SystemAuthorizingRealm.Principal;
import com.thinkgem.jeesite.modules.sys.service.SystemService;
import com.thinkgem.jeesite.modules.sys.utils.LogUtils;
import com.thinkgem.jeesite.modules.sys.utils.UserUtils;


public class CasLoginRealm extends CasRealm {

	private Logger logger = LoggerFactory.getLogger(getClass());
	
	private SystemService systemService;
	
	/**
	 * 
	 * @MethodName: doGetAuthenticationInfo 
	 * @Description: 認證
	 * @param @param token
	 * @param @return
	 * @param @throws AuthenticationException
	 * @author 
	 */
	@Override
	protected AuthenticationInfo doGetAuthenticationInfo(
			AuthenticationToken token) throws AuthenticationException {
		 CasToken casToken = (CasToken) token;
	        if (token == null) {
	            return null;
	        }
	        
	        String ticket = (String)casToken.getCredentials();
	        if (!org.apache.shiro.util.StringUtils.hasText(ticket)) {
	            return null;
	        }
	        
	        TicketValidator ticketValidator = ensureTicketValidator();

	        try {
	            // contact CAS server to validate service ticket
	            Assertion casAssertion = ticketValidator.validate(ticket, getCasService());
	            // get principal, user id and attributes
	            AttributePrincipal casPrincipal = casAssertion.getPrincipal();
	            String username = casPrincipal.getName();
	            logger.debug("Validate ticket : {} in CAS server : {} to retrieve user : {}", new Object[]{
	                    ticket, getCasServerUrlPrefix(), username
	            });

	            User user = getSystemService().getUserByLoginName(username);
	            // refresh authentication token (user id + remember me)
	            casToken.setUserId(username);
	            
	            // create simple authentication info
//	            PrincipalCollection principalCollection = new SimplePrincipalCollection(new SimplePrincipalCollection(new Principal(user, false), getName()), getName());
	            return new SimpleAuthenticationInfo(new SimplePrincipalCollection(new Principal(user, false), getName()), ticket);
	        } catch (TicketValidationException e) { 
	            throw new CasAuthenticationException("Unable to validate ticket [" + ticket + "]", e);
	        }
	}



	/**
	 * 授權方案    
	 * 
	 * 
	 * 在驗證之後的授權信息    
	 */
	
	@Override
	protected AuthorizationInfo doGetAuthorizationInfo(
			PrincipalCollection principals) {
		
		Principal principal = (Principal) getAvailablePrincipal(principals);
		// 獲取當前已登錄的用戶
		if (!Global.TRUE.equals(Global.getConfig("user.multiAccountLogin"))){
			Collection<Session> sessions = getSystemService().getSessionDao().getActiveSessions(true, principal, UserUtils.getSession());
			if (sessions.size() > 0){
				// 如果是登錄進來的，則踢出已在線用戶
				if (UserUtils.getSubject().isAuthenticated()){
					for (Session session : sessions){
						getSystemService().getSessionDao().delete(session);
					}
				}
				// 記住我進來的，並且當前用戶已登錄，則退出當前用戶提示信息。
				else{
					UserUtils.getSubject().logout();
					throw new AuthenticationException("msg:賬號已在其它地方登錄，請重新登錄。");
				}
			}
		}
		User user = getSystemService().getUserByLoginName(principal.getLoginName());
		if (user != null) {
			SimpleAuthorizationInfo info = new SimpleAuthorizationInfo();
			List<Menu> list = UserUtils.getMenuList();
			for (Menu menu : list){
				if (StringUtils.isNotBlank(menu.getPermission())){
					// 添加基於Permission的權限信息
					for (String permission : StringUtils.split(menu.getPermission(),",")){
						info.addStringPermission(permission);
					}
				}
			}
			// 添加用戶權限
			info.addStringPermission("user");
			// 添加用戶角色信息
			for (Role role : user.getRoleList()){
				info.addRole(role.getEnname());
			}
			// 更新登錄IP和時間
			getSystemService().updateUserLoginInfo(user);
			// 記錄登錄日誌
			LogUtils.saveLog(Servlets.getRequest(), "系統登錄");
			return info;
		} else {
			return null;
		}
	}
	
	
	
	/**
	 * 獲取系統業務對象
	 */
	public SystemService getSystemService() {
		if (systemService == null){
			systemService = SpringContextHolder.getBean(SystemService.class);
		}
		return systemService;
	}
	
	
	/**
	 * 未使用客戶端jar包    需要手動解析
	 */
	public Map<String,String> getSsoUserInfo(String str){
		Map<String,String> map = new HashMap<String, String>();
		String str2 = str.replaceAll(" ", "").replaceAll("\t|\n", "").replace("=[",",").replace("]", "").replace("{", "").replace("}", "");
		String[] strs = str2.split(",");
		try {
			for (String strl : strs) {
				if(strl.startsWith("NAME") && strl.length()>4){
					map.put("NAME", URLDecoder.decode(strl.replace("NAME", ""), "UTF-8"));
				}
				if(strl.startsWith("LOGINNAME") && strl.length()>9){
					map.put("LOGINNAME", URLDecoder.decode(strl.replace("LOGINNAME", ""), "UTF-8"));
				}
			}
		} catch (Exception e) {
			// TODO: handle exception
		}
		
		return map;
	}
}

 

 

 

 

 

3、修改配置spring-context-shiro.xml

4、修改完成後我們直接訪問項目首頁，會跳轉到cas登錄入口，此時輸入用戶名和密碼登錄。

5、這個時候並不能完成登錄，我們默認的用戶名casuser，這是認證服務器的用戶名，那這個用戶名如何登錄我們的系統呢？從代碼中我們可以看到，cas認證通過的信息根據用戶名，與系統中用戶的登錄名匹配，來加載用戶信息。那麼我們要改一下cas的登錄名稱，修改後再登錄，便可使用該用戶進入到系統。