(编辑:jimmy 日期: 2024/12/26 浏览:2)
在使用mysql数据库经常都会遇到这么一个问题,其它用户定义的存储过程,现在使用另一个用户却无法修改或者删除等;正常情况下存储过程的定义者对它有修改、删除的权限;但是其它的用户就要相于的授权,不然无法查看、调用;
mysql 中使用用户A创建一个存储过程,现在想通过另一个用户B来修改A创建的存储过程;以下记录就是基于这样的情况产生的;
用户A对OTO3库的权限:
mysql> show grants for 'a'@'%'; +---------------------------------------------------+ | Grants for a@% | +---------------------------------------------------+ | GRANT USAGE ON *.* TO 'a'@'%' | | GRANT ALL PRIVILEGES ON `OTO3`.* TO 'a'@'%' | +---------------------------------------------------+ 2 rows in set (0.00 sec)
用户B的权限:
mysql> show grants for 'swper'@'%'; +----------------------------------------------------------------------+ | Grants for swper@% | +----------------------------------------------------------------------+ | GRANT USAGE ON *.* TO 'swper'@'%' | | GRANT SELECT, UPDATE, DELETE, DROP, ALTER ON `OTO3`.* TO 'swper'@'%' | +----------------------------------------------------------------------+ 2 rows in set (0.00 sec)
以用户B的身份登陆Mysql操作;
[root@mysql ~]# mysql -h10.0.10.110 -uswper -p123456
查存储过程列表时就提示没有权限了:
mysql> select `name` from mysql.proc where db = 'OTO3' and `type` = 'PROCEDURE'; ERROR 1142 (42000): SELECT command denied to user 'swper'@'mysql' for table 'proc'
以root身份给B用户添加一个查看存储过程的权限:
mysql> grant select on mysql.proc to 'swper'@'%'; Query OK, 0 rows affected (0.00 sec) mysql> show grants for 'swper'@'%'; +----------------------------------------------------------------------+ | Grants for swper@% | +----------------------------------------------------------------------+ | GRANT USAGE ON *.* TO 'swper'@'%' | | GRANT SELECT, UPDATE, DELETE, DROP, ALTER ON `OTO3`.* TO 'swper'@'%' | | GRANT SELECT ON `mysql`.`proc` TO 'swper'@'%' | +----------------------------------------------------------------------+ 3 rows in set (0.00 sec)
再回到B用户里查看存储过程列表:
mysql> select `name` from mysql.proc where db = 'OTO3' and `type` = 'PROCEDURE'; +------------------------+ | name | +------------------------+ | proc_cs | +------------------------+ 1 rows in set (0.00 sec)
此时发现多了一个mysql库,但只有对mysql.proc有查询权限:
mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | OTO3 | | mysql | +--------------------+ 3 rows in set (0.00 sec)
mysql库中只有一个表:proc
mysql> use mysql mysql> show tables; +-----------------+ | Tables_in_mysql | +-----------------+ | proc | +-----------------+ 1 row in set (0.00 sec)
同样也可以看到存储过程的详细信息:
mysql> show create procedure proc_cs\G *************************** 1. row *************************** Procedure: proc_cs sql_mode: STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION Create Procedure: CREATE DEFINER=`a`@`%` PROCEDURE `proc_cs`() BEGIN
尝试修改存储过程的配置:
mysql> ALTER PROCEDURE proc_cs MODIFIES SQL DATA SQL SECURITY INVOKER; ERROR 1370 (42000): alter routine command denied to user 'b'@'%' for routine 'OTO3.proc_cs'
为了方便查看在Navicat工具上尝试修改存储过程,在保存的时候报如下权限问题:
1227 -Access denied;you need(at least one of)the SUPER privilege(s) for this operation
尝试添加一个存储过程,报权限信息:
1044 - Access denied for user ‘b'@'%' to database ‘OTO3'
这里表示b用户没有对OTO3有授权存储过程的修改权限;
以B用户尝试调用一下存储过程:
Procedure execution failed
1370 - execute command denied to user ‘b'@'%' for routine ‘OTO3.proc_cs'
这里很明显连运行权限也没有;
尝试删除原有的a用户定义的存储过程,也会报权限信息,如下:
1370 - alter routine command denied to user ‘b'@'%' for routine ‘OTO3.proc_cs'
可以看出B用户连调用存储过程的权限都没有,这里先加入执行权限:
接下来添加一个执行存储过程的权限:
mysql> grant execute on OTO3.* to 'b'@'%'; Query OK, 0 rows affected (0.00 sec) mysql> show grants for 'b'@'%'; +-------------------------------------------------------------------------------+ | Grants for b@% | +-------------------------------------------------------------------------------+ | GRANT USAGE ON *.* TO 'b'@'%' | | GRANT SELECT, UPDATE, DELETE, DROP, ALTER, EXECUTE ON `OTO3`.* TO 'b'@'%' | | GRANT SELECT ON `mysql`.`proc` TO 'b'@'%' | +-------------------------------------------------------------------------------+ 3 rows in set (0.00 sec)
再次执行一下存储过程,发现成功了;
时间: 0.080ms
Procedure executed successfully
受影响的行: 0
那再添加一下创建添加存储过程的权限:
mysql> grant CREATE ROUTINE on OTO3.* to 'b'@'%'; Query OK, 0 rows affected (0.00 sec)
mysql> show grants for 'b'@'%'; +-----------------------------------------------------------------------------------------------+ | Grants for b@% | +-----------------------------------------------------------------------------------------------+ | GRANT USAGE ON *.* TO 'b'@'%' | | GRANT SELECT, UPDATE, DELETE, DROP, ALTER, EXECUTE, CREATE ROUTINE ON `OTO3`.* TO 'b'@'%' | | GRANT SELECT ON `mysql`.`proc` TO 'b'@'%' | +-----------------------------------------------------------------------------------------------+ 3 rows in set (0.00 sec)
上面添加权限后就可以创建存储过程了;
CREATE DEFINER=`b`@`%` PROCEDURE `aaaa`() BEGIN #Routine body goes here... SELECT * from mysql.user; END
但是自己创建的都无法删除;
1370 - alter routine command denied to user ‘b'@'%' for routine ‘OTO3.aaaa'
接下来再添加一个修改的权限,也可以删除的哦;
mysql> grant alter ROUTINE on OTO3.* to 'b'@'%'; Query OK, 0 rows affected (0.01 sec)
查看用户权限
mysql> show grants for 'b'@'%'; +--------------------------------------------------------------------------------------------------------------+ | Grants for b@% | +--------------------------------------------------------------------------------------------------------------+ | GRANT USAGE ON *.* TO 'b'@'%' | | GRANT SELECT, UPDATE, DELETE, DROP, ALTER, EXECUTE, CREATE ROUTINE, ALTER ROUTINE ON `OTO3`.* TO 'b'@'%' | | GRANT SELECT ON `mysql`.`proc` TO 'b'@'%' | +--------------------------------------------------------------------------------------------------------------+ 3 rows in set (0.00 sec)
上面添加完alter ROUTINE权限后就可以对OTO3所有的存储过程有删除权限[自己定义的增、删、改],别人定义的可以删除,但是还不能修改;修改别人定义的存储过程会有如下提示:
1227 - Access denied; you need (at least one of)the SUPER privilege(s) for this operation
这里说明一下这个SUPER权限在哪里?通过查看用户权限原来在这里:
mysql> select * from mysql.user where user='b'\G *************************** 1. row *************************** Host: % User: b Select_priv: N Insert_priv: N Update_priv: N Delete_priv: N Create_priv: N Drop_priv: N Reload_priv: N Shutdown_priv: N Process_priv: N File_priv: N Grant_priv: N References_priv: N Index_priv: N Alter_priv: N Show_db_priv: N Super_priv: N Create_tmp_table_priv: N Lock_tables_priv: N Execute_priv: N Repl_slave_priv: N Repl_client_priv: N Create_view_priv: N Show_view_priv: N Create_routine_priv: N Alter_routine_priv: N Create_user_priv: N Event_priv: N Trigger_priv: N Create_tablespace_priv: N ssl_type: ssl_cipher: x509_issuer: x509_subject: max_questions: 0 max_updates: 0 max_connections: 0 max_user_connections: 0 plugin: mysql_native_password authentication_string: *CCB4F88E945E0E14F9BEB093EB797BB0BDBFA175 password_expired: N password_last_changed: 2017-03-06 11:37:35 password_lifetime: NULL account_locked: N 1 row in set (0.00 sec)
尝试添加一下这个SUPER权限看看:
mysql> grant SUPER on OTO3.* to 'b'@'%'; ERROR 1221 (HY000): Incorrect usage of DB GRANT and GLOBAL PRIVILEGES mysql> grant SUPER on *.* to 'b'@'%'; Query OK, 0 rows affected (0.00 sec)
不能对指定的库执行这个权限,因为SUPER为全局的就是整个mysql的权限;
mysql> show grants for 'swper'@'%'; +--------------------------------------------------------------------------------------------------------------+ | Grants for swper@% | +--------------------------------------------------------------------------------------------------------------+ | GRANT SUPER ON *.* TO 'swper'@'%' | | GRANT SELECT, UPDATE, DELETE, DROP, ALTER, EXECUTE, CREATE ROUTINE, ALTER ROUTINE ON `OTO3`.* TO 'swper'@'%' | | GRANT SELECT ON `mysql`.`proc` TO 'swper'@'%' | +--------------------------------------------------------------------------------------------------------------+ 3 rows in set (0.00 sec)
再次检查时会发现 Super_priv: Y 变化了;再修改一下别人定义的存储过程;
mysql> select * from mysql.user where user='b'\G
查看所有数据库,发现mysql库只有一张proc表有读取的权限,SUPER并非我所想象中那么强大;
mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | OTO3 | | mysql | +--------------------+ 3 rows in set (0.00 sec)
仔细观看会发现执行语句:
mysql> select * from mysql.user where user='b'\G
可以看到有 Create_routine_priv: N和 Alter_routine_priv: N 这两个明显就是对存储过程的权限嘛,能不能不用SUPER而使用这两个权限呢?
回收一下这个SUPER权限;
mysql> revoke super on *.* from 'b'@'%'; Query OK, 0 rows affected (0.01 sec)
再添加Alter_routine_priv,Create_routine_priv
mysql> grant alter routine,create routine on *.* to 'b'@'%'; Query OK, 0 rows affected (0.00 sec)
查看用户b权限
mysql> show grants for 'b'@'%'; +--------------------------------------------------------------------------------------------------------------+ | Grants for b@% | +--------------------------------------------------------------------------------------------------------------+ | GRANT CREATE ROUTINE, ALTER ROUTINE ON *.* TO 'b'@'%' | | GRANT SELECT, UPDATE, DELETE, DROP, ALTER, EXECUTE, CREATE ROUTINE, ALTER ROUTINE ON `OTO3`.* TO 'b'@'%' | | GRANT SELECT ON `mysql`.`proc` TO 'b'@'%' | +--------------------------------------------------------------------------------------------------------------+ 3 rows in set (0.00 sec)
发现还是报相同的权限问题:
1227 - Access denied; you need (at least one of)the SUPER privilege(s) for this operation
执行上面权限后发现,可以看到其它的系统库:[例如sys库也有存储过程,由于这两个权限是全局的]
mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | OTO3 | | mysql | | performance_schema | | sys | | test | +--------------------+ 6 rows in set (0.00 sec)
这两个权限更大,连系统库sys中的存储过程都能看到,甚至修改删除,非常危险;决定再次回收权限
create routine,alter routine; mysql> revoke create routine,alter routine on *.* from 'b'@'%';
还是使用SUPER权限比较安全;
通过上面的测试得出以下结论:
简来说用户A在数据库OTO3中定义了一个存储过程,现在想用用户B来执行、修改存储过程,需要对用户B添加以下权限:
GRANT SELECT ON MYSQL.PROC TO 'B'; GRANT EXECUTE, CREATE ROUTINE, ALTER ROUTINE ON `OTO3`.* TO 'B'; GRANT SUPER ON *.* TO 'B';
所以用户B的最基本的权限:
mysql> show grants for 'b'@'%'; +----------------------------------------------------------------------------------------+ | Grants for b@% | +----------------------------------------------------------------------------------------+ | GRANT SUPER ON *.* TO 'b'@'%' | | GRANT SELECT, ALTER, EXECUTE, CREATE ROUTINE, ALTER ROUTINE ON `OTO3`.* TO 'b'@'%' | | GRANT SELECT ON `mysql`.`proc` TO 'b'@'%' | +----------------------------------------------------------------------------------------+ 3 rows in set (0.00 sec)
至此,对于Mysql中以另的用户修改其它人定义的存储过程权限也就非常的显白了;
如果不是以另一个用户身份调用存储过程,可以使用root权限修改存储过程的定义者; 这样就等于linux里的所有者权限变更了;
update mysql.proc set DEFINER='b'@'%' WHERE NAME='proc_cs' AND db='OTO3';