Mysql 修改密码安全等级:ERROR 1819 (HY000) Your password does not satisfy the current policy requirements

现象

mysql中操作密码相关命令时出现error

mysql> select password('admin');
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements

原因

mysql中有密码校验规则，通过命令查看

mysql> show variables like 'validate_password%';
+--------------------------------------+--------+
| Variable_name                        | Value  |
+--------------------------------------+--------+
| validate_password_check_user_name    | OFF    |
| 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      |
+--------------------------------------+--------+
7 rows in set (0.00 sec)

密码校验分为三个等级：

1. 0 or LOW：约束 Length
2. 1 or MEDIUM   ：约束 Length; numeric, lowercase/uppercase, and special characters
3. 2 or STRONG   ：约束 Length; numeric, lowercase/uppercase, and special characters; dictionary file

约束项包括：

• validate_password_policy ：这个参数用于控制validate_password的验证策略 0-->low  1-->MEDIUM  2-->strong。
• validate_password_length ：密码长度的最小值(这个值最小要是4)。
• validate_password_number_count ：密码中数字的最小个数。
• validate_password_mixed_case_count ：大小写的最小个数。
• validate_password_special_char_count ：特殊字符的最小个数。
• validate_password_dictionary_file ：字典文件，只能是文件中的字符

处理方案

方案一

根据规则设置密码

方案二

修改规则,根据需求修改响应参数，只改validate_password_policy无效。

mysql> set global validate_password_length=4;
Query OK, 0 rows affected (0.00 sec)

mysql> set global validate_password_number_count=0;
Query OK, 0 rows affected (0.00 sec)

mysql> set global validate_password_mixed_case_count=0;
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> show variables like 'validate_password%';
+--------------------------------------+--------+
| Variable_name                        | Value  |
+--------------------------------------+--------+
| validate_password_check_user_name    | OFF    |
| validate_password_dictionary_file    |        |
| validate_password_length             | 4      |
| validate_password_mixed_case_count   | 0      |
| validate_password_number_count       | 0      |
| validate_password_policy             | MEDIUM |
| validate_password_special_char_count | 0      |
+--------------------------------------+--------+
7 rows in set (0.01 sec)

mysql> select password('admin');
+-------------------------------------------+
| password('admin')                         |
+-------------------------------------------+
| *4ACFE3202A5FF5CF467898FC58AAB1D615029441 |
+-------------------------------------------+
1 row in set, 1 warning (0.00 sec)