02.shiro认证-SSM

1.盐加密

package com.hz.shiro;


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

/**
 * 用于shiro权限认证的密码工具类
 */
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);
        System.out.println(salt.length());
        //凭证+盐加密后得到的密码
        String credentials = createCredentials("123456", salt);
        System.out.println(credentials);
        System.out.println(credentials.length());
        boolean b = checkCredentials("123456", salt, credentials);
        System.out.println(b);
    }
}

2.shiro的认证

package com.hz.ssm.shiro;

import com.hz.ssm.biz.UserBiz;
import com.hz.ssm.model.User;
import org.apache.shiro.authc.*;
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黄仲
 * @site www.Hz.com
 * @company 公司
 * @create 2022-08-25 19:21
 */
public class MyRealm extends AuthorizingRealm {

    public UserBiz getUserBiz() {
        return userBiz;
    }

    public void setUserBiz(UserBiz userBiz) {
        this.userBiz = userBiz;
    }

    public UserBiz userBiz;

    //    授权
    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) {
        return null;
    }
//  认正
    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {
        String userName = token.getPrincipal().toString();
        User user = userBiz.queryUserByUserName(userName);
        AuthenticationInfo info=new SimpleAuthenticationInfo(
                user.getUsername(),
                user.getPassword(),
                ByteSource.Util.bytes(user.getSalt()),
                this.getName()
        );

        return info;
    }
}

package com.hz.ssm.intercept;

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;
import javax.servlet.http.HttpServletResponse;

/**
 * @author黄仲
 * @site www.Hz.com
 * @company 公司
 * @create 2022-08-19 20:07
 */
@Controller
public class LoginController {
    @RequestMapping("/login")
    public String login(HttpServletRequest req, HttpServletResponse resp){
        String username = req.getParameter("username");
        String password = req.getParameter("password");
        UsernamePasswordToken Token = new UsernamePasswordToken(username, password);
        Subject subject = SecurityUtils.getSubject();
        try {
            subject.login(Token);
            return  "main";
        } catch (Exception e) {
            req.setAttribute("message", "您的用户名密码输入有误！！！");
            return "login";
        }
    }

    @RequestMapping("/logout")
    public String logout(HttpServletRequest req, HttpServletResponse resp){
        Subject subject = SecurityUtils.getSubject();
        subject.logout();
        return "login";
    }

}

<?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.hz.ssm.shiro.MyRealm">
        <property name="userBiz" ref="userBiz" />
        <!--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>

1.盐加密

2.shiro的认证

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