[SQL] 简单新建(create)删除(drop\delete)权限(grant/revoke)修改(set\update)
一、前言
说起来 数据库(Structured Query Language),本站写过很多类似文章。
如:
甚至:我还做了一个项目:SQL 中用户建立与权限授予
然而,今天弄信息安全的时候一个 MYSQL 的问题瞬间把握弄懵了。我就在想如果碰到 利用社区开源代码进行二次开发的商业软件,那应该怎么办呢?有哪些具体的操作。
本文针对上述内容做了思考,总结以下内容。
二、思考
从商业软件的角度出发,一定是希望以最小的代价获取最大的回报。
- 利用 mairadb 开源代码完成核心部分,开发一个 GUI 外壳方便用户使用与隐藏伪装。
- 利用 phpmyadmin 现成网页端解决方案。
- MySQL 生态非常好,兼容性非常高。
三、检查
1、确定 my.ini 位置
首先找到 control panel -> 看到MYSQL服务 -> 右键属性确定my.ini位置
2、尝试登陆
发现无法登陆。(using password: YES)
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password)
这种类型的提示是帐号密码不对或者帐号不存在的现象。
四、破解
1、添加 skip-grant-tables
在文件“底部”添加 skip-grant-tables 保存退出 -> 重启服务
BTW:网上说给 mysqld.exe 加 --skip-grant-tables 进行权限的略过,我并没有成功。
2、破解登陆
2-1、查询情况
cmd.exe -> mysql -h localhost -u root -p > 直接登陆
MariaDB [(none)]> select user,host from mysql.user;
+------+-----------+
| user | host |
+------+-----------+
| root | 127.0.0.1 |
| root | ::1 |
| root | localhost |
+------+-----------+
3 rows in set (0.00 sec)
MariaDB [(none)]>
2-2、新建用户
MariaDB [(none)]> create user 'root'@'%' identified by "example";
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.01 sec)
MariaDB [(none)]>
2-3、删除用户
MariaDB [(none)]> drop user 'root'@'%';
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]>
这样就没办法远程登陆(“%”)了
2-4、权限相关
MariaDB [(none)]> grant all privileges on *.* to 'rabbit'@'%' IDENTIFIED BY 'rabbit';
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> revoke all privileges on *.* from 'root'@'%' ;
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]>
- ALL PRIVILEGES- as we saw previously, this would allow a MySQL user all access to a designated database (or if no database is selected, across the system)
- CREATE- allows them to create new tables or databases
- DROP- allows them to them to delete tables or databases
- DELETE- allows them to delete rows from tables
- INSERT- allows them to insert rows into tables
- SELECT- allows them to use the Select command to read through databases
- UPDATE- allow them to update table rows
- GRANT OPTION- allows them to grant or remove other users' privileges
2-5、修改密码
MariaDB [(none)]> SET PASSWORD FOR 'rabbit'@'%' = PASSWORD('test');
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> UPDATE mysql.user SET password=PASSWORD('other-way') where user = 'rabbit' and host = '%';
Query OK, 1 row affected (0.00 sec)
Rows matched: 1 Changed: 1 Warnings: 0
MariaDB [(none)]> flush privileges;
Query OK, 0 rows affected (0.00 sec)
希望大家都能熟练掌握。
(完)