1 Authenticator 简介

1.1 层次结构图

Shrio03 Authenticator、配置多个Realm、SecurityManager认证策略-LMLPHP

1.2 作用

职责是验证用户帐号,是ShiroAPI中身份验证核心的入口点;接口中声明的authenticate方法就是用来实现认证逻辑的。

1.3 源代码

Shrio03 Authenticator、配置多个Realm、SecurityManager认证策略-LMLPHP

1.4 authenticate

》该方法是实现认证逻辑的。
》如果验证成功,将返回AuthenticationInfo验证信息;此信息中包含了身份及凭证;如果验证失败将抛出相应的 AuthenticationException 实现。

2 ModularRealmAuthenticator

2.1 关系图

Shrio03 Authenticator、配置多个Realm、SecurityManager认证策略-LMLPHP

2.2 作用

认证策略接口,自定义认证策略时只需要继承该类即可(PS:一般使用默认的三种策略即可)

2.3 三种策略

》FirstSuccessfulStrategy:只要有一个Realm验证成功即可,只返回第一个Realm身份验证 成功的认证信息,其他的忽略;
》AtLeastOneSuccessfulStrategy:只要有一个Realm验证成功即可,和FirstSuccessfulStrategy 不同,返回所有 Realm 身份验证成功的认证信息;
》AllSuccessfulStrategy:所有Realm验证成功才算成功,且返回所有Realm身份验证成功的 认证信息,如果有一个失败就失败了。
》注意:ModularRealmAuthenticator 默认使用 AtLeastOneSuccessfulStrategy 策略。

3 代码实现

3.1 环境搭建

创建一个Maven项目,并引入shiro、junit相关依赖

        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-core</artifactId>
            <version>1.4.0</version>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>

3.2 自定义Realm

》实现Realm接口即可
》MyRealm01

package com.xunyji.shirotest.realm;

import org.apache.shiro.authc.*;
import org.apache.shiro.realm.Realm;

/**
 * @author AltEnter
 * @create 2019-01-21 16:21
 * @desc 简易Realm01
 **/
public class MyRealm01 implements Realm {

    /** 用户名 */
    public static final String USERNAME = "fury1";
    /** 用户密码 */
    public static final String PASSWORD = "111111";

    public String getName() {
        return "MyRealm01";
    }

    public boolean supports(AuthenticationToken token) {
        if (token instanceof UsernamePasswordToken) {
            return true;
        }
        return false;
    }

    public AuthenticationInfo getAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {
        String username = (String) token.getPrincipal();
        String password = new String((char[]) token.getCredentials());
        if (USERNAME.equals(username) && PASSWORD.equals(password)) {
            return new SimpleAuthenticationInfo(username, password, getName());
        } else {
            throw new RuntimeException("MyRealm01 - 用户名或者密码错误");
        }
    }

}

》MyRealm02

package com.xunyji.shirotest.realm;

import org.apache.shiro.authc.*;
import org.apache.shiro.realm.Realm;

/**
 * @author AltEnter
 * @create 2019-01-21 16:21
 * @desc 简易Realm01
 **/
public class MyRealm02 implements Realm {

    /** 用户名 */
    public static final String USERNAME = "fury2";
    /** 用户密码 */
    public static final String PASSWORD = "222222";

    public String getName() {
        return "MyRealm02";
    }

    public boolean supports(AuthenticationToken token) {
        if (token instanceof UsernamePasswordToken) {
            return true;
        }
        return false;
    }

    public AuthenticationInfo getAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {
        String username = (String) token.getPrincipal();
        String password = new String((char[]) token.getCredentials());
        if (USERNAME.equals(username) && PASSWORD.equals(password)) {
            return new SimpleAuthenticationInfo(username, password, getName());
        } else {
            throw new RuntimeException("MyRealm02 - 用户名或者密码错误");
        }
    }

}

3.3 思路

》实例化Realm
》实例化SecurityManager
》实例化ModularRealmAuthenticator
》实例化FirstSuccessfulStrategy
》给ModularRealmAuthenticator对象设置认证策略
》给SecurityManager设置认证对象
》给SecurityManager设置Realm对象
》注意:SecurityManager必须先设置Authenticator再设置Realm,否则会报错

3.4 源代码

package com.xunyji.shirotest.autenticatedemo;

import com.xunyji.shirotest.realm.MyRealm01;
import com.xunyji.shirotest.realm.MyRealm02;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.authc.pam.AllSuccessfulStrategy;
import org.apache.shiro.authc.pam.AtLeastOneSuccessfulStrategy;
import org.apache.shiro.authc.pam.FirstSuccessfulStrategy;
import org.apache.shiro.authc.pam.ModularRealmAuthenticator;
import org.apache.shiro.mgt.DefaultSecurityManager;
import org.apache.shiro.realm.Realm;
import org.apache.shiro.subject.Subject;
import org.junit.Test;

import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

/**
 * @author AltEnter
 * @create 2019-01-21 16:26
 * @desc
 **/
public class TestDemo {
    @Test
    public void test01() {
//        01 获取Realm对象
        MyRealm01 myRealm01 = new MyRealm01();
        MyRealm02 myRealm02 = new MyRealm02();

//        02 获取SecurityManager对象
        DefaultSecurityManager defaultSecurityManager = new DefaultSecurityManager();
//        03 设置SecurityManager对象的认证策略
        ModularRealmAuthenticator modularRealmAuthenticator = new ModularRealmAuthenticator();
        modularRealmAuthenticator.setAuthenticationStrategy(new FirstSuccessfulStrategy());
//        modularRealmAuthenticator.setAuthenticationStrategy(new AllSuccessfulStrategy());
        defaultSecurityManager.setAuthenticator(modularRealmAuthenticator);

//        04 设置SecurityManager的Realm
//        defaultSecurityManager.setRealm(myRealm01);
//        defaultSecurityManager.setRealm(myRealm02);
        Set<Realm> realmHashSet = new HashSet<Realm>();
        realmHashSet.add(myRealm01);
        realmHashSet.add(myRealm02);
        defaultSecurityManager.setRealms(realmHashSet);

        SecurityUtils.setSecurityManager(defaultSecurityManager);
        Subject subject = SecurityUtils.getSubject();

        UsernamePasswordToken token = new UsernamePasswordToken("fury1", "111111");
//        UsernamePasswordToken token = new UsernamePasswordToken("fury2", "222222");

        subject.login(token);

        System.out.println(String.format("认证结果为:%s", subject.isAuthenticated()));

        subject.logout();

        System.out.println(String.format("认证结果为:%s", subject.isAuthenticated()));

    }
}

Shrio03 Authenticator、配置多个Realm、SecurityManager认证策略-LMLPHP

01-22 03:09