美国云服务器如何在mysql5.7设置密码策略
MySQL5.6.6版本之后增加了密码强度验证插件validate_password
查看一下MySQL密码相关的几个全局参数:
mysql> select @@validate_password_policy;
+----------------------------+
| @@validate_password_policy |
+----------------------------+
| MEDIUM |
+----------------------------+
1 row in set (0.00 sec)
mysql> SHOW VARIABLES LIKE 'validate_password%';
+--------------------------------------+--------+
| Variable_name | Value |
+--------------------------------------+--------+
| validate_password_dictionary_file | |
| validate_password_length | 8 |
| validate_password_mixed_case_count | 1 |
| validate_password_number_count | 1 |
| validate_password_policy | MEDIUM |
| validate_password_special_char_count | 1 |
+--------------------------------------+--------+
6 rows in set (0.08 sec)
参数解释:
validate_password_dictionary_file是插件用于验证密码强度的字典文件路径。
validate_password_length是密码最小长度,参数默认为8,它有最小值的限制,最小值为:validate_password_number_count + validate_password_special_char_count + (2 * validate_password_mixed_case_count)
validate_password_mixed_case_count是密码至少要包含的小写字母个数和大写字母个数。
validate_password_number_count是密码至少要包含的数字个数。
validate_password_policy是密码强度检查等级,0/LOW、1/MEDIUM、2/STRONG。有以下取值:
PolicyTests Performed
0 or LOWLength
1 or MEDIUMLength; numeric, lowercase/uppercase, and special characters
2 or STRONGLength; numeric, lowercase/uppercase, and special characters; dictionary file
默认是1,即MEDIUM,所以刚开始设置的密码必须符合长度,且必须含有数字,小写或大写字母,特殊字符。
validate_password_special_char_count密码至少要包含的特殊字符数。
由此,进行MySQL的权限放低设置:
mysql> set global validate_password_policy=0;
Query OK, 0 rows affected (0.05 sec)
mysql> set global validate_password_mixed_case_count=0;
Query OK, 0 rows affected (0.00 sec)
mysql> set global validate_password_number_count=3;
Query OK, 0 rows affected (0.00 sec)
mysql> set global validate_password_special_char_count=0;
Query OK, 0 rows affected (0.00 sec)
mysql> set global validate_password_length=3;
Query OK, 0 rows affected (0.00 sec)
mysql> SHOW VARIABLES LIKE 'validate_password%';
+--------------------------------------+-------+
| Variable_name | Value |
+--------------------------------------+-------+
| validate_password_dictionary_file | |
| validate_password_length | 3 |
| validate_password_mixed_case_count | 0 |
| validate_password_number_count | 3 |
| validate_password_policy | LOW |
| validate_password_special_char_count | 0 |
+--------------------------------------+-------+
6 rows in set (0.00 sec)
注意:这种操作会对账户密码的安全性管理大大降低,请谨慎操作。
再次执行命令,即可通过:
mysql> grant all privileges on *.* to 'root'@'%' identified by 'password' with grant option;
Query OK, 0 rows affected (0.00 sec)
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