Shiro - 基础篇（下）

[users]
cheng = 123,admin
[roles]
admin = user:delete,user:update

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>shiro-learn</artifactId>
        <groupId>com.cheng</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <artifactId>shiro-test</artifactId>
    <dependencies>
        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-core</artifactId>
            <version>1.4.0</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.46</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.6</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
    </dependencies>
</project>

package com.cheng.shiro.realm;
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.authz.SimpleAuthorizationInfo;
import org.apache.shiro.crypto.hash.Md5Hash;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.apache.shiro.util.ByteSource;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
/**
 * 自定义 Realm
 */
public class CustomRealm extends AuthorizingRealm {
    Map<String, String> userMap = new HashMap<>(16);
    {
        userMap.put("cheng", "66f469382db2328c876b700deb336220");
        super.setName("customRealm");
    }
    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) {
        String username = (String) principals.getPrimaryPrincipal();
        Set<String> roles = getRolesByUserName(username);
        Set<String> permissions = getPermissionsByUsername(username);
        SimpleAuthorizationInfo simpleAuthorizationInfo = new SimpleAuthorizationInfo();
        simpleAuthorizationInfo.setRoles(roles);
        simpleAuthorizationInfo.setStringPermissions(permissions);
        return simpleAuthorizationInfo;
    }
    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken) throws AuthenticationException {
        // 1. 从主体传过来的认证信息中，获得用户名
        String username = (String) authenticationToken.getPrincipal();
        // 2. 通过用户名到数据库中获取凭证
        String password = getPasswordByUsername(username);
        if (password == null) {
            return null;
        }
        SimpleAuthenticationInfo authenticationInfo =
                new SimpleAuthenticationInfo(username, password, "customRealm");
        // 设置加密的 盐
        authenticationInfo.setCredentialsSalt(ByteSource.Util.bytes("cheng"));
        return authenticationInfo;
    }
    private Set<String> getRolesByUserName(String username) {
        Set<String> set = new HashSet<>();
        // 从数据库或者缓存中获取角色数据
        set.add("admin");
        set.add("user");
        return set;
    }
    private Set<String> getPermissionsByUsername(String username) {
        Set<String> set = new HashSet<>();
        set.add("user:delete");
        set.add("user:update");
        return set;
    }
    /**
     * 模拟数据库查询凭证
     */
    private String getPasswordByUsername(String username) {
        return userMap.get(username);
    }
    public static void main(String[] args) {
        // 密码 + 盐 加密后的结果
        Md5Hash md5Hash = new Md5Hash("123", "cheng");
        System.out.println(md5Hash.toString());
    }
}

package com.cheng.test;
import com.cheng.shiro.realm.CustomRealm;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.authc.credential.HashedCredentialsMatcher;
import org.apache.shiro.mgt.DefaultSecurityManager;
import org.apache.shiro.subject.Subject;
import org.junit.Test;
/**
 * 自定义 Realm
 */
public class CustomerRealmTest {
    @Test
    public void testAuthentication() {
        CustomRealm customRealm = new CustomRealm();
        // 1. 构建 SecurityManager 环境
        DefaultSecurityManager defaultSecurityManager = new DefaultSecurityManager();
        defaultSecurityManager.setRealm(customRealm);
        // 加密
        HashedCredentialsMatcher matcher = new HashedCredentialsMatcher();
        // 加密算法名称
        matcher.setHashAlgorithmName("md5");
        // 加密次数
        matcher.setHashIterations(1);
        // 自定义 Realm 中设置加密对象
        customRealm.setCredentialsMatcher(matcher);
        // 2. 主体提交认证请求
        SecurityUtils.setSecurityManager(defaultSecurityManager);
        Subject subject = SecurityUtils.getSubject();
        UsernamePasswordToken token = new UsernamePasswordToken("cheng", "123");
        subject.login(token);
        System.out.println("isAuthenticated: " + subject.isAuthenticated());
        subject.checkRole("admin");
        subject.checkPermission("user:delete");
        subject.checkPermission("user:update");
    }
}