springboot shiro 多realm配置认证、授权

shiro进行登录认证和权限管理的实现。其中需求涉及使用两个角色分别是：门店，公司。现在要两者实现分开登录。即需要两个Realm——MyShiroRealmSHOP和MyShiroRealmCOMPANY，分别处理门店，公司的验证功能。

但是正常情况下，当定义了多个Realm，无论是门店登录还是公司登录，都会由这两个Realm共同处理。这是因为，当配置了多个Realm时，我们通常使用的认证器是shiro自带的org.apache.shiro.authc.pam.ModularRealmAuthenticator，其中决定使用的Realm的是doAuthenticate()方法，源代码如下：

protected AuthenticationInfo doAuthenticate(AuthenticationToken authenticationToken) throws AuthenticationException {
        assertRealmsConfigured();
        Collection<Realm> realms = getRealms();
        if (realms.size() == 1) {
            return doSingleRealmAuthentication(realms.iterator().next(), authenticationToken);
        } else {
            return doMultiRealmAuthentication(realms, authenticationToken);
        }
    }

上述代码的意思就是如果有多个Realm就会使用所有配置的Realm。只有一个的时候，就直接使用当前的Realm。

为了实现需求，我会创建一个org.apache.shiro.authc.pam.ModularRealmAuthenticator的子类，并重写doAuthenticate()方法，让特定的Realm完成特定的功能。如何区分呢？我会同时创建一个org.apache.shiro.authc.UsernamePasswordToken的子类，在其中添加一个字段VirtualType，用来标识登录的类型，即是门店登录还是公司登录。具体步骤如下：

public enum VirtualType {
    COMPANY,        // 公司
    SHOP            // 门店
}

　　接下来新建org.apache.shiro.authc.UsernamePasswordToken的子类UserToken

import org.apache.shiro.authc.UsernamePasswordToken;

public class UserToken extends UsernamePasswordToken {
    private VirtualType virtualType;

    public UserToken(final String username, final String password, VirtualType virtualType) {
        super(username, password);
        this.virtualType = virtualType;
    }

    public VirtualType getVirtualType() {
        return virtualType;
    }

    public void setVirtualType(VirtualType virtualType) {
        this.virtualType = virtualType;
    }
}

　　新建org.apache.shiro.authc.pam.ModularRealmAuthenticator的子类UserModularRealmAuthenticator：

import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.pam.ModularRealmAuthenticator;
import org.apache.shiro.realm.Realm;

public class UserModularRealmAuthenticator extends ModularRealmAuthenticator {

    private static final Logger logger = LoggerFactory.getLogger(UserModularRealmAuthenticator.class);

    @Override
    protected AuthenticationInfo doAuthenticate(AuthenticationToken authenticationToken)
            throws AuthenticationException {
        logger.info("UserModularRealmAuthenticator:method doAuthenticate() execute ");
        // 判断getRealms()是否返回为空
        assertRealmsConfigured();
        // 强制转换回自定义的CustomizedToken
        UserToken userToken = (UserToken) authenticationToken;
        // 登录类型
        VirtualType virtualType = userToken.getVirtualType();
        // 所有Realm
        Collection<Realm> realms = getRealms();
        // 登录类型对应的所有Realm
        Collection<Realm> typeRealms = new ArrayList<>();
        for (Realm realm : realms) {
            if (realm.getName().contains(virtualType.toString()))　　// 注：这里使用类名包含枚举，区分realm
                typeRealms.add(realm);
        }
        // 判断是单Realm还是多Realm
        if (typeRealms.size() == 1) {
            logger.info("doSingleRealmAuthentication() execute ");
            return doSingleRealmAuthentication(typeRealms.iterator().next(), userToken);
        } else {
            logger.info("doMultiRealmAuthentication() execute ");
            return doMultiRealmAuthentication(typeRealms, userToken);
        }
    }
}

　　创建分别处理门店登录还是公司登录的Realm：

import org.apache.shiro.authc.*;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.springframework.beans.factory.annotation.Autowired;

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

/**公司登陆realm
 */
public class MyShiroRealmCOMPANY extends AuthorizingRealm {

    @Autowired
    IUserService userService;

    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) {
        String username = (String) principals.getPrimaryPrincipal(); // 一定是String类型，在SimpleAuthenticationInfo
        SystemUser systemUser = userService.getUserByName(username, VirtualType.COMPANY);
        if (systemUser == null) {
            throw new RuntimeException("system concurrent exception: COMPANY user not found:username=" + username);
        }

        SimpleAuthorizationInfo authorizationInfo = new SimpleAuthorizationInfo();

        Set<String> stringPermissions = new HashSet<>(256);
　　 　　// 字符串资源
        authorizationInfo.addStringPermissions(stringPermissions);
        return authorizationInfo;
    }

    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken) throws AuthenticationException {
//        UsernamePasswordToken token = (UsernamePasswordToken) authenticationToken;
        UserToken token = (UserToken)authenticationToken;
        // 逻辑登陆
        return new SimpleAuthenticationInfo(token.getPrincipal(), token.getCredentials(), getName());
    }
}

import org.apache.shiro.authc.*;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.springframework.beans.factory.annotation.Autowired;

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

/**门店登陆realm
 */
public class MyShiroRealmSHOP extends AuthorizingRealm {

    @Autowired
    IUserService userService;

    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) {
        String username = (String) principals.getPrimaryPrincipal(); // 一定是String类型，在SimpleAuthenticationInfo
        SystemUser systemUser = userService.getUserByName(username, VirtualType.SHOP);
        if (systemUser == null) {
            throw new RuntimeException("system concurrent exception: SHOP user not found:username=" + username);
        }

        SimpleAuthorizationInfo authorizationInfo = new SimpleAuthorizationInfo();

        Set<String> stringPermissions = new HashSet<>(256);
　　 　　// 字符串资源
        authorizationInfo.addStringPermissions(stringPermissions);
        return authorizationInfo;
    }

    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken) throws AuthenticationException {
//        UsernamePasswordToken token = (UsernamePasswordToken) authenticationToken;
        UserToken token = (UserToken)authenticationToken;
        // 逻辑登陆
        return new SimpleAuthenticationInfo(token.getPrincipal(), token.getCredentials(), getName());
    }
}

　　ShiroConfig配置

    @Bean("securityManager")
    public SecurityManager securityManager(RedisTemplate redisTemplate) {　　　　　　　　　　// redisTemplate配置的redis缓存，可忽略
        DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
        List<Realm> realms = new ArrayList<>();
        //添加多个Realm
        realms.add(myShiroRealmSHOP(redisTemplate));
        realms.add(myShiroRealmCOMPANY(redisTemplate));
        securityManager.setAuthenticator(modularRealmAuthenticator());          // 需要再realm定义之前
        securityManager.setRealms(realms);
        securityManager.setSessionManager(myShiroSession(redisTemplate));
        return securityManager;
    }

    /**
     * 系统自带的Realm管理，主要针对多realm 认证
     */
    @Bean
    public ModularRealmAuthenticator modularRealmAuthenticator() {
        //自己重写的ModularRealmAuthenticator
        UserModularRealmAuthenticator modularRealmAuthenticator = new UserModularRealmAuthenticator();
        modularRealmAuthenticator.setAuthenticationStrategy(new AtLeastOneSuccessfulStrategy());
        return modularRealmAuthenticator;
    }

    @Bean("myShiroRealmSHOP")
    public MyShiroRealmSHOP myShiroRealmSHOP(RedisTemplate redisTemplate) {
        return new MyShiroRealmSHOP();
    }

    @Bean("myShiroRealmCOMPANY")
    public MyShiroRealmCOMPANY myShiroRealmCOMPANY(RedisTemplate redisTemplate) {
        return new MyShiroRealmCOMPANY();
    }

　　登陆即可：

subject.login(new UserToken(username, password, virtualType))

这里需要注意的是，上述配置的Authenticator主要针对登陆认证，对于授权时没有控制的，使用资源注入时会发现，使用的是myShiroRealmSHOP的doGetAuthorizationInfo方法（上面SHOP的定义在前），没有走对应的realm的授权，产生问题错乱；

新建org.apache.shiro.authz.ModularRealmAuthorizer子类：

import org.apache.shiro.authz.Authorizer;
import org.apache.shiro.authz.ModularRealmAuthorizer;
import org.apache.shiro.realm.Realm;
import org.apache.shiro.subject.PrincipalCollection;

public class UserModularRealmAuthorizer extends ModularRealmAuthorizer {
    @Override
    public boolean isPermitted(PrincipalCollection principals, String permission) {
        assertRealmsConfigured();
        for (Realm realm : getRealms()) {
            if (!(realm instanceof Authorizer)){ continue;}
            //  todo 授权配置
            if (realm.getName().contains(VirtualType.COMPANY.toString())) {　　　　// 判断realm
                if (permission.contains("company")) {　　　　// 判断是否改realm的资源
                    return ((MyShiroRealmCOMPANY) realm).isPermitted(principals, permission);    // 使用改realm的授权方法
                }
            }
            if (realm.getName().contains(VirtualType.SHOP.toString())) {
                if (permission.contains("shop")) {
                    return ((MyShiroRealmSHOP) realm).isPermitted(principals, permission);
                }
            }
        }
        return false;
    }
}

　　然后在ShiroConfig更改：

    @Bean("securityManager")
    public SecurityManager securityManager(RedisTemplate redisTemplate) {
        DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
        // 使用注解,@RequiresPermissions，读取缓存权限信息保存key对象为：{@link org.apache.shiro.subject.SimplePrincipalCollection}，所以redis缓存配置的String不能转换
//        securityManager.setCacheManager(redisCacheManager(redisTemplate));
        List<Realm> realms = new ArrayList<>();
        //添加多个Realm
        realms.add(myShiroRealmSHOP(redisTemplate));
        realms.add(myShiroRealmCOMPANY(redisTemplate));
        securityManager.setAuthenticator(modularRealmAuthenticator());
        securityManager.setAuthorizer(modularRealmAuthorizer());　　　　// 这里
        securityManager.setRealms(realms);
        securityManager.setSessionManager(myShiroSession(redisTemplate));
        return securityManager;
    }

    /**
     * 系统自带的Realm管理，主要针对多realm 认证
     */
    @Bean
    public ModularRealmAuthenticator modularRealmAuthenticator() {
        //自己重写的ModularRealmAuthenticator
        UserModularRealmAuthenticator modularRealmAuthenticator = new UserModularRealmAuthenticator();
        modularRealmAuthenticator.setAuthenticationStrategy(new AtLeastOneSuccessfulStrategy());
        return modularRealmAuthenticator;
    }

    /**
     * 系统自带的Realm管理，主要针对多realm 授权
     */
    @Bean
    public ModularRealmAuthorizer modularRealmAuthorizer() {
        //自己重写的ModularRealmAuthorizer
        UserModularRealmAuthorizer modularRealmAuthorizer = new UserModularRealmAuthorizer();
        return modularRealmAuthorizer;
    }

    @Bean("myShiroRealmSHOP")
    public MyShiroRealmSHOP myShiroRealmSHOP(RedisTemplate redisTemplate) {
        return new MyShiroRealmSHOP();
    }

    @Bean("myShiroRealmCOMPANY")
    public MyShiroRealmCOMPANY myShiroRealmCOMPANY(RedisTemplate redisTemplate) {
        return new MyShiroRealmCOMPANY();
    }

参考：https://blog.csdn.net/cckevincyh/article/details/79629022