智销系统项目day5 - shiro&权限

1.shiro的认识

权限框架(提供的易用的API,功能强大)

1.1 和Spring security区别

框架	shiro	Spring security
易用性	√	X
粒度	粗	细(强大)

1.2 shiro的四大基石

身份验证、授权、密码学和会话管理
securityManager:核心对象 realm:获取数据接口

2.shiro的核心api

2.1 操作之前，先得到securityManager对象

 //一.创建我们自己的Realm
MyRealm myRealm = new MyRealm();

//二.搞一个核心对象:
DefaultSecurityManager securityManager = new DefaultSecurityManager();
securityManager.setRealm(myRealm);

//三.把securityManager放到上下文中
SecurityUtils.setSecurityManager(securityManager);

2.2 我们使用过的方法

//1.拿到当前用户
Subject currentUser = SecurityUtils.getSubject();
//2.判断是否登录
currentUser.isAuthenticated();
//3.登录(需要令牌的)
/**
    UnknownAccountException:用户名不存在
    IncorrectCredentialsException:密码错误
    AuthenticationException:其它错误
*/
 UsernamePasswordToken token = new UsernamePasswordToken("admin", "123456");
 currentUser.login(token);
 
//4.判断是否是这个角色/权限
currentUser.hasRole("角色名")
currentUser.isPermitted("权限名")

3.密码加密功能

/**
 * String algorithmName, Object source, Object salt, int hashIterations)
 * 第一个参数algorithmName:加密算法名称
 * 第二个参数source:加密原密码
 * 第三个参数salt:盐值
 * 第四个参数hashIterations:加密次数
 */
SimpleHash hash = new SimpleHash("MD5","123456","itsource",10);
System.out.println(hash.toHex());

4.自定义Realm

继承AuthorizingRealm

实现两个方法：doGetAuthorizationInfo(授权) /doGetAuthenticationInfo(登录认证)

//身份认证
@Override
protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken) throws AuthenticationException {
    //1.拿用户名与密码
    UsernamePasswordToken token = (UsernamePasswordToken)authenticationToken;
    String username = token.getUsername();
    //2.根据用户名拿对应的密码
    String password = getByName(username);
    if(password==null){
        return null; //返回空代表用户名有问题
    }
    //返回认证信息
    //准备盐值
    ByteSource salt = ByteSource.Util.bytes("itsource");
    //密码是shiro自己进行判断
    SimpleAuthenticationInfo authenticationInfo = new SimpleAuthenticationInfo(username,password,salt,getName());
    return authenticationInfo;
}

//授权
@Override
protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
    //拿到用户名  Principal:主体(用户对象/用户名)
    String username = (String)principalCollection.getPrimaryPrincipal();
    //拿到角色
    Set<String> roles = findRolesBy(username);
    //拿到权限
    Set<String> permis = findPermsBy(username);
    //把角色权限交给用户
    SimpleAuthorizationInfo authorizationInfo = new SimpleAuthorizationInfo();
    authorizationInfo.setRoles(roles);
    authorizationInfo.setStringPermissions(permis);
    return authorizationInfo;
}

注意:如果我们的密码加密，应该怎么判断(匹配器)

//一.创建我们自己的Realm
MyRealm myRealm = new MyRealm();
//创建一个凭证匹配器(无法设置盐值)
HashedCredentialsMatcher matcher = new HashedCredentialsMatcher();
//  使用MD5的方式比较密码
matcher.setHashAlgorithmName("md5");
// 设置编码的迭代次数
matcher.setHashIterations(10);
//设置凭证匹配器(加密方式匹配)
myRealm.setCredentialsMatcher(matcher);

5.集成Spring

去找：shiro-root-1.4.0-RC2\samples\spring

5.1 导包

 <dependency>
    <groupId>org.apache.shirogroupId>
    <artifactId>shiro-allartifactId>
    <version>1.4.0version>
    <type>pomtype>
dependency>
  
  <dependency>
    <groupId>org.apache.shirogroupId>
    <artifactId>shiro-springartifactId>
    <version>1.4.0version>
  dependency>

5.2 web.xml

这个过滤器是一个代码(只关注它的名称)

  <filter>
    <filter-name>shiroFilterfilter-name>
    <filter-class>org.springframework.web.filter.DelegatingFilterProxyfilter-class>
    <init-param>
      <param-name>targetFilterLifecycleparam-name>
      <param-value>trueparam-value>
    init-param>
  filter>

  <filter-mapping>
    <filter-name>shiroFilterfilter-name>
    <url-pattern>/*url-pattern>
  filter-mapping>

5.3 application-shiro.xml

在咱们的application引入

<import resource="classpath:applicationContext-shiro.xml" />

是从案例中拷备过来，进行了相应的修改

<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-3.0.xsd">


    
    <bean id="securityManager" class="org.apache.shiro.web.mgt.DefaultWebSecurityManager">
        
        <property name="realm" ref="jpaRealm"/>
    bean>

    
    <bean id="jpaRealm" class="cn.itsource.aisell.shiro.JpaRealm">
        
        <property name="credentialsMatcher">
            <bean class="org.apache.shiro.authc.credential.HashedCredentialsMatcher">
                
                <property name="hashAlgorithmName" value="md5"/>
                
                <property name="hashIterations" value="10" />
            bean>
        property>
    bean>

    
    <bean id="lifecycleBeanPostProcessor" class="org.apache.shiro.spring.LifecycleBeanPostProcessor"/>
    <bean class="org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator"
          depends-on="lifecycleBeanPostProcessor"/>
    <bean class="org.apache.shiro.spring.security.interceptor.AuthorizationAttributeSourceAdvisor">
        <property name="securityManager" ref="securityManager"/>
    bean>


    
    <bean id="shiroFilter" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean">
        <property name="securityManager" ref="securityManager"/>
        
        <property name="loginUrl" value="/s/login.jsp"/>
        
        <property name="successUrl" value="/s/main.jsp"/>
        
        <property name="unauthorizedUrl" value="/s/unauthorized.jsp"/>
        
        
        <property name="filterChainDefinitionMap" ref="filterChainDefinitionMap" />
    bean>
    
    <bean id="filterChainDefinitionMap"
          factory-bean="filterChainDefinitionMapFactory"
          factory-method="createFilterChainDefinitionMap" />
    
    <bean id="filterChainDefinitionMapFactory" class="cn.itsource.aisell.shiro.FilterChainDefinitionMapFactory" />
beans>

5.4 获取Map过滤

注意，返回的Map必需是有序的（LinkedHashMap）

public class FilterChainDefinitionMapFactory {

    /**
     * 后面这个值会从数据库中来拿
     * /s/login.jsp = anon
     * /login = anon
     * /s/permission.jsp = perms[user:index]
     * /depts/index = perms[depts:index]
     * /** = authc
     */
    public Map<String,String> createFilterChainDefinitionMap(){
        //注:LinkedHashMap是有序的
        Map<String,String> filterChainDefinitionMap = new LinkedHashMap<>();

        filterChainDefinitionMap.put("/s/login.jsp", "anon");
        filterChainDefinitionMap.put("/login", "anon");
        filterChainDefinitionMap.put("/s/permission.jsp", "perms[user:index]");
        filterChainDefinitionMap.put("/depts/index", "perms[depts:index]");
        filterChainDefinitionMap.put("/**", "authc");

        return filterChainDefinitionMap;
    }
}