shiro身份认证

盐加密

为了数据安全性，我们会使用盐加密

可以将明文转化为密文
我们使用MD5加密
（可以反向解密，解密的原因在于一个明文对应一个密文）

盐加密工具类，在做新增用户的时候使用，将加密后的密码、及加密时候的盐放入数据库；
本篇博客中的表数据是现成的，暂时用不上这个工具类去生成数据；

导入pom.xml依赖

<dependency>
    <groupId>org.apache.shiro</groupId>
    <artifactId>shiro-core</artifactId>
    <version>1.3.2</version>
</dependency>

<dependency>
    <groupId>org.apache.shiro</groupId>
    <artifactId>shiro-web</artifactId>
    <version>1.3.2</version>
</dependency>

<dependency>
    <groupId>org.apache.shiro</groupId>
    <artifactId>shiro-spring</artifactId>
    <version>1.3.2</version>
</dependency>

加盐后一个明文可以对应不同的密文，加了多少次，就可以解密多少次

package com.hsl.ssm.util;

import org.apache.shiro.crypto.RandomNumberGenerator;
import org.apache.shiro.crypto.SecureRandomNumberGenerator;
import org.apache.shiro.crypto.hash.SimpleHash;

public class PasswordHelper {

    /**
     * 随机数生成器
     */
    private static RandomNumberGenerator randomNumberGenerator = new SecureRandomNumberGenerator();

    /**
     * 指定hash算法为MD5
     */
    private static final String hashAlgorithmName = "md5";

    /**
     * 指定散列次数为1024次，即加密1024次
     */
    private static final int hashIterations = 1024;

    /**
     * true指定Hash散列值使用Hex加密存. false表明hash散列值用用Base64-encoded存储
     */
    private static final boolean storedCredentialsHexEncoded = true;

    /**
     * 获得加密用的盐
     *
     * @return
     */
    public static String createSalt() {
        return randomNumberGenerator.nextBytes().toHex();
    }

    /**
     * 获得加密后的凭证
     *
     * @param credentials 凭证(即密码)
     * @param salt        盐
     * @return
     */
    public static String createCredentials(String credentials, String salt) {
        SimpleHash simpleHash = new SimpleHash(hashAlgorithmName, credentials,
                salt, hashIterations);
        return storedCredentialsHexEncoded ? simpleHash.toHex() : simpleHash.toBase64();
    }


    /**
     * 进行密码验证
     *
     * @param credentials        未加密的密码
     * @param salt               盐
     * @param encryptCredentials 加密后的密码
     * @return
     */
    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);//输出盐
        System.out.println(salt.length());//盐的长度
        //凭证+盐加密后得到的密码
        String credentials = createCredentials("123", salt);
        System.out.println(credentials);//密文
        System.out.println(credentials.length());//密文长度
        boolean b = checkCredentials("123", salt, credentials);//判断明文与密文是否相对应
        System.out.println(b);//输出结果
    }
}

但是当我再一次启动后盐和密文又会不一样

shiro认证

web.xml添加配置

<!-- shiro过滤器定义 -->
<filter>
  <filter-name>shiroFilter</filter-name>
  <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
  <init-param>
    <!-- 该值缺省为false,表示生命周期由SpringApplicationContext管理,设置为true则表示由ServletContainer管理 -->
    <param-name>targetFilterLifecycle</param-name>
    <param-value>true</param-value>
  </init-param>
</filter>
<filter-mapping>
  <filter-name>shiroFilter</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>

逆向生成对应的表的mapper,model文件
generatorConfig.xml

 <table schema="" tableName="t_shiro_permission" domainObjectName="ShiroPermission"
               enableCountByExample="false" enableDeleteByExample="false"
               enableSelectByExample="false" enableUpdateByExample="false">
        </table>
        <table schema="" tableName="t_shiro_role" domainObjectName="ShiroRole"
               enableCountByExample="false" enableDeleteByExample="false"
               enableSelectByExample="false" enableUpdateByExample="false">
        </table>
        <table schema="" tableName="t_shiro_role_permission" domainObjectName="RolePermission"
               enableCountByExample="false" enableDeleteByExample="false"
               enableSelectByExample="false" enableUpdateByExample="false">
        </table>
        <table schema="" tableName="t_shiro_user" domainObjectName="ShiroUser"
               enableCountByExample="false" enableDeleteByExample="false"
               enableSelectByExample="false" enableUpdateByExample="false">
        </table>
        <table schema="" tableName="t_shiro_user_role" domainObjectName="UserRole"
               enableCountByExample="false" enableDeleteByExample="false"
               enableSelectByExample="false" enableUpdateByExample="false">
        </table>

ShiroUserMapper.java添加

 ShiroUser queryByName(@Param("userName") String userName);

ShiroUserMapper.xml添加

<select id="queryByName" resultType="com.hsl.ssm.model.ShiroUser" parameterType="java.lang.String">
    select
    <include refid="Base_Column_List" />
    from t_shiro_user
    where userName = #{userName}
  </select>

创建接口ShiroUserService.java

package com.hsl.ssm.service;

import com.hsl.ssm.model.ShiroUser;

/**
 * @author water
 * @site www.water.com
 * @company xxx公司
 * @create 2019-12-01 14:38
 */
public interface ShiroUserService {
    ShiroUser queryByName( String userName);
}

实现类ShiroUserServiceImpl .java

package com.hsl.ssm.service.impl;

import com.hsl.ssm.mapper.ShiroUserMapper;
import com.hsl.ssm.model.ShiroUser;
import com.hsl.ssm.service.ShiroUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * @author water
 * @site www.water.com
 * @company xxx公司
 * @create 2019-12-01 14:39
 */
@Service("shiroUserService")
public class ShiroUserServiceImpl implements ShiroUserService {
    @Autowired
    private ShiroUserMapper shiroUserMapper;
    @Override
    public ShiroUser queryByName(String userName) {
        return shiroUserMapper.queryByName(userName);
    }
}

创建MyRealm.java

package com.hsl.ssm.shiro;

import com.hsl.ssm.model.ShiroUser;
import com.hsl.ssm.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;

/**
 * @author water
 * @site www.water.com
 * @company xxx公司
 * @create 2019-11-30 22:01
 *
 * 充当ini文件
 */
public class MyRealm extends AuthorizingRealm {

    private ShiroUserService shiroUserService;

    public ShiroUserService getShiroUserService() {
        return shiroUserService;
    }

    public void setShiroUserService(ShiroUserService shiroUserService) {
        this.shiroUserService = shiroUserService;
    }

    /**
     * 授权
     * @param principalCollection
     * @return
     */
    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
        return null;
    }

    /**
     * 认证
     * @param authenticationToken
     * @return
     * @throws AuthenticationException
     * authenticationToken是从controller层传递过来，也就是一些登录操作，会访问这个方法
     */
    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken) throws AuthenticationException {
       String userName=authenticationToken.getPrincipal().toString();//得到用户名
        ShiroUser shiroUser = this.shiroUserService.queryByName(userName);//得到整个用户信息
        AuthenticationInfo authenticationInfo=new SimpleAuthenticationInfo(
                shiroUser.getUsername(),
                shiroUser.getPassword(),
                ByteSource.Util.bytes(shiroUser.getSalt()),
                this.getName()

        );

        return authenticationInfo;
    }
}

applicationContext-shiro.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="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.xsd">

    <!--配置自定义的Realm-->
    <bean id="shiroRealm" class="com.hsl.ssm.shiro.MyRealm">
        <property name="shiroUserService" ref="shiroUserService" />
        <!--注意：重要的事情说三次~~~~~~此处加密方式要与用户注册时的算法一致 -->
        <!--注意：重要的事情说三次~~~~~~此处加密方式要与用户注册时的算法一致 -->
        <!--注意：重要的事情说三次~~~~~~此处加密方式要与用户注册时的算法一致 -->
        <!--以下三个配置告诉shiro将如何对用户传来的明文密码进行加密-->
        <property name="credentialsMatcher">
            <bean id="credentialsMatcher" class="org.apache.shiro.authc.credential.HashedCredentialsMatcher">
                <!--指定hash算法为MD5-->
                <property name="hashAlgorithmName" value="md5"/>
                <!--指定散列次数为1024次-->
                <property name="hashIterations" value="1024"/>
                <!--true指定Hash散列值使用Hex加密存. false表明hash散列值用用Base64-encoded存储-->
                <property name="storedCredentialsHexEncoded" value="true"/>
            </bean>
        </property>
    </bean>

    <!--注册安全管理器-->
    <bean id="securityManager" class="org.apache.shiro.web.mgt.DefaultWebSecurityManager">
        <property name="realm" ref="shiroRealm" />
    </bean>

    <!--Shiro核心过滤器-->
    <bean id="shiroFilter" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean">
        <!-- Shiro的核心安全接口,这个属性是必须的 -->
        <property name="securityManager" ref="securityManager" />
        <!-- 身份验证失败，跳转到登录页面 -->
        <property name="loginUrl" value="/login"/>
        <!-- 身份验证成功，跳转到指定页面 -->
        <!--<property name="successUrl" value="/index.jsp"/>-->
        <!-- 权限验证失败，跳转到指定页面 -->
        <property name="unauthorizedUrl" value="/unauthorized.jsp"/>
        <!-- Shiro连接约束配置,即过滤链的定义 -->
        <property name="filterChainDefinitions">
            <value>
                <!--
                注：anon，authcBasic，auchc，user是认证过滤器
                    perms，roles，ssl，rest，port是授权过滤器
                -->
                <!--anon 表示匿名访问，不需要认证以及授权-->
                <!--authc表示需要认证 没有进行身份认证是不能进行访问的-->
                <!--roles[admin]表示角色认证，必须是拥有admin角色的用户才行-->
                /user/login=anon
                /user/updatePwd.jsp=authc
                /admin/*.jsp=roles[admin]
                /user/teacher.jsp=perms["user:update"]
                <!-- /css/**               = anon
                 /images/**            = anon
                 /js/**                = anon
                 /                     = anon
                 /user/logout          = logout
                 /user/**              = anon
                 /userInfo/**          = authc
                 /dict/**              = authc
                 /console/**           = roles[admin]
                 /**                   = anon-->
            </value>
        </property>
    </bean>

    <!-- Shiro生命周期，保证实现了Shiro内部lifecycle函数的bean执行 -->
    <bean id="lifecycleBeanPostProcessor" class="org.apache.shiro.spring.LifecycleBeanPostProcessor"/>
</beans>

applicationContext.xml添加

 <!--整合shiro-->
    <import resource="applicationContext-shiro.xml"></import>

controller层
UserController.java

package com.hsl.ssm.controller;

import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.subject.Subject;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;

/**
 * @author water
 * @site www.water.com
 * @company xxx公司
 * @create 2019-12-01 15:08
 */
@Controller
public class UserController {
    @RequestMapping("/login")
    public  String login(HttpServletRequest request){
        String uname=request.getParameter("username");
        String upwd=request.getParameter("password");
        UsernamePasswordToken usernamePasswordToken=new UsernamePasswordToken(uname,upwd);
        Subject subject = SecurityUtils.getSubject();
        try {
            subject.login(usernamePasswordToken);
            request.getSession().setAttribute("username",uname);
            return "main";
        }catch (Exception e){
            request.setAttribute("message","用户名或密码错误！！！");
            return "login";
        }
    }


    @RequestMapping("/logout")
    public  String logout(){
        Subject subject = SecurityUtils.getSubject();
        subject.logout();
        return "redirect:/login.jsp";
    }
}

测试