Shiro认证-SSM

一、盐加密

继续在之前的ssm项目上续写

（一）Shiro环境配置与表生成

1、导入pom相关依赖

            org.apache.shiro
            shiro-core
            1.3.2
        

        
            org.apache.shiro
            shiro-web
            1.3.2
        

        
            org.apache.shiro
            shiro-spring
            1.3.2
        

2、web.xml配置

 
  
    shiroFilter
    org.springframework.web.filter.DelegatingFilterProxy
    
      
      targetFilterLifecycle
      true
    
  
  
    shiroFilter
    
    private static RandomNumberGenerator randomNumberGenerator = new SecureRandomNumberGenerator();

    
    private static final String hashAlgorithmName = "md5";

    
    private static final int hashIterations = 1024;

    
    private static final boolean storedCredentialsHexEncoded = true;

    
    public static String createSalt() {
        return randomNumberGenerator.nextBytes().toHex();
    }

    
    public static String createCredentials(String credentials, String salt) {
        SimpleHash simpleHash = new SimpleHash(hashAlgorithmName, credentials,
                salt, hashIterations);
        return storedCredentialsHexEncoded ? simpleHash.toHex() : simpleHash.tobase64();
    }


    
    public static boolean checkCredentials(String credentials, String salt, String encryptCredentials) {
        return encryptCredentials.equals(createCredentials(credentials, salt));
    }

    public static void main(String[] args) {
        //盐
        String salt = createSalt();
        System.out.println(salt);
        System.out.println(salt.length());
        //凭证+盐加密后得到的密码
        String credentials = createCredentials("123", salt);
        System.out.println(credentials);
        System.out.println(credentials.length());
        boolean b = checkCredentials("123", salt, credentials);
        System.out.println(b);
    }
}

2、运行获得结果

第一次运行：

 第二次运行：

 两次运行的结果都不相同，但同时都是123；安全系数高 

二、Shiro认证

1、Myrealm.java

 自定义Realm
  Shiro从Realm获取安全数据（如用户、角色、权限），就是说SecurityManager要验证用户身份，那么它需要从Realm获取相应的用户进行比较以确定用户身份是否合法；也需要从Realm得到用户相应的角色/权限进行验证用户是否能进行操作；可以把Realm看成DataSource，即安全数据源。

  最基础的是Realm接口，CachingRealm负责缓存处理，AuthenticationRealm负责认证，AuthorizingRealm负责授权。

  通常自定义的realm继承AuthorizingRealm

  注1：体系结构见“shiro提供的realm.png”

  AuthorizationInfo：授权信息
  AuthenticationInfo：认证信息

继承AuthorizingRealm需要重写两个方法；重写授权与认证

package com.lsy.shiro;

import com.lsy.model.ShiroUser;
import com.lsy.service.ShiroUserService;
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.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.apache.shiro.util.ByteSource;
import org.springframework.stereotype.Service;




public class MyRealm extends AuthorizingRealm {
    private ShiroUserService shiroUserService;

    public ShiroUserService getShiroUserService() {

        return shiroUserService;
    }

    public void setShiroUserService(ShiroUserService shiroUserService) {

        this.shiroUserService = shiroUserService;
    }


    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) {
        return null;
    }

    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {
        System.out.println("身份认证...");
        //token就是controller层中的login请求，subject.login(token)
        String username = token.getPrincipal().toString();
        String password = token.getCredentials().toString();
        ShiroUser user = shiroUserService.queryByName(username);
//        拿到数据库中的用户信息，放入token凭证中，用于controler进行对比
        AuthenticationInfo info = new SimpleAuthenticationInfo(
                user.getUsername(),
                user.getPassword(),
                ByteSource.Util.bytes(user.getSalt()),
                this.getName()
        );
        return info;
    }
}

2、applicationContext-shiro.xml

MyRealm要交给spring进行管理需要在applicationContext-shiro.xml中进行配置

    
    
        
        
        
        
        
        
            
                
                
                
                
                
                
            
        
    

    
    
        
    

    
    
        
        
        
        
        
        
        
        
        
        
            
                
                
                
                
                /user/login=anon
                /user/updatePwd.jsp=authc
                /admin
@Controller
public class ShiroUserController {

    @RequestMapping("/login")
    public String login(HttpServletRequest req, HttpServletResponse resp){
        String username = req.getParameter("username");
        String password = req.getParameter("password");
        UsernamePasswordToken usernamePasswordToken = new UsernamePasswordToken(username, password);
        Subject subject = SecurityUtils.getSubject();
        try {
            subject.login(usernamePasswordToken);
            req.getRequestDispatcher("main.jsp").forward(req, resp);
        } catch (Exception e) {
            req.setAttribute("message", "您的用户名密码输入有误！！！");
            try {
                req.getRequestDispatcher("login.jsp").forward(req, resp);
            } catch (ServletException e1) {
                e1.printStackTrace();
            } catch (IOException e1) {
                e1.printStackTrace();
            }
        }
        return null;
    }

    @RequestMapping("/logout")
    public String logout(HttpServletRequest req, HttpServletResponse resp){
        Subject subject = SecurityUtils.getSubject();
        subject.logout();
        try {
            resp.sendRedirect(req.getContextPath()+"/login.jsp");
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }
}

4、导入相关jsp界面

 5、 将applicationContext-shiro.xml交给spring进行管理

6、结果

这与shiro入门测试结果一致，变化的是shiro入门用的是死数据（ini文件），

而这次用的是数据库数据

①、不填写登录

 ②、不同角色登录，查看到的功能各不相同

张三：

 ③、权限查看

王五登录点击用户新增显示界面