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 程式師世界 >> 數據庫知識 >> MYSQL數據庫 >> MySQL綜合教程 >> ERROR 1819 (HY000): Your password does not satisfy the current policy requirements,hy000satisfy

ERROR 1819 (HY000): Your password does not satisfy the current policy requirements,hy000satisfy

編輯:MySQL綜合教程

ERROR 1819 (HY000): Your password does not satisfy the current policy requirements,hy000satisfy


為了加強安全性,MySQL5.7為root用戶隨機生成了一個密碼,在error log中,關於error log的位置,如果安裝的是RPM包,則默認是/var/log/mysqld.log。

一般可通過log_error設置

mysql> select @@log_error;
+---------------------+
| @@log_error         |
+---------------------+
| /var/log/mysqld.log |
+---------------------+
1 row in set (0.00 sec)

可通過# grep "password" /var/log/mysqld.log 命令獲取MySQL的臨時密碼

2016-01-19T05:16:36.218234Z 1 [Note] A temporary password is generated for root@localhost: waQ,qR%be2(5

用該密碼登錄到服務端後,必須馬上修改密碼,不然會報如下錯誤:

mysql> select user();
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.

如果只是修改為一個簡單的密碼,會報以下錯誤:

mysql>  ALTER USER USER() IDENTIFIED BY '12345678';
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements

這個其實與validate_password_policy的值有關。

validate_password_policy有以下取值:

PolicyTests Performed 0 or LOW Length 1 or MEDIUM Length; numeric, lowercase/uppercase, and special characters 2 or STRONG Length; numeric, lowercase/uppercase, and special characters; dictionary file

默認是1,即MEDIUM,所以剛開始設置的密碼必須符合長度,且必須含有數字,小寫或大寫字母,特殊字符。

有時候,只是為了自己測試,不想密碼設置得那麼復雜,譬如說,我只想設置root的密碼為123456。

必須修改兩個全局參數:

首先,修改validate_password_policy參數的值

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

這樣,判斷密碼的標准就基於密碼的長度了。這個由validate_password_length參數來決定。

mysql> select @@validate_password_length;
+----------------------------+
| @@validate_password_length |
+----------------------------+
|                          8 |
+----------------------------+
1 row in set (0.00 sec)

validate_password_length參數默認為8,它有最小值的限制,最小值為:

validate_password_number_count
+ validate_password_special_char_count
+ (2 * validate_password_mixed_case_count)

其中,validate_password_number_count指定了密碼中數據的長度,validate_password_special_char_count指定了密碼中特殊字符的長度,validate_password_mixed_case_count指定了密碼中大小字母的長度。

這些參數,默認值均為1,所以validate_password_length最小值為4,如果你顯性指定validate_password_length的值小於4,盡管不會報錯,但validate_password_length的值將設為4。如下所示:

mysql> select @@validate_password_length;
+----------------------------+
| @@validate_password_length |
+----------------------------+
|                          8 |
+----------------------------+
1 row in set (0.00 sec)

mysql> set global validate_password_length=1;
Query OK, 0 rows affected (0.00 sec)

mysql> select @@validate_password_length;
+----------------------------+
| @@validate_password_length |
+----------------------------+
|                          4 |
+----------------------------+
1 row in set (0.00 sec)

如果修改了validate_password_number_count,validate_password_special_char_count,validate_password_mixed_case_count中任何一個值,則validate_password_length將進行動態修改。

mysql> select @@validate_password_length;
+----------------------------+
| @@validate_password_length |
+----------------------------+
|                          4 |
+----------------------------+
1 row in set (0.00 sec)

mysql> select @@validate_password_mixed_case_count;
+--------------------------------------+
| @@validate_password_mixed_case_count |
+--------------------------------------+
|                                    1 |
+--------------------------------------+
1 row in set (0.00 sec)

mysql> set global validate_password_mixed_case_count=2;
Query OK, 0 rows affected (0.00 sec)

mysql> select @@validate_password_mixed_case_count;
+--------------------------------------+
| @@validate_password_mixed_case_count |
+--------------------------------------+
|                                    2 |
+--------------------------------------+
1 row in set (0.00 sec)

mysql> select @@validate_password_length;
+----------------------------+
| @@validate_password_length |
+----------------------------+
|                          6 |
+----------------------------+
1 row in set (0.00 sec)

當然,前提是validate_password插件必須已經安裝,MySQL5.7是默認安裝的。

那麼如何驗證validate_password插件是否安裝呢?可通過查看以下參數,如果沒有安裝,則輸出將為空。

mysql> SHOW VARIABLES LIKE 'validate_password%';
+--------------------------------------+-------+
| Variable_name                        | Value |
+--------------------------------------+-------+
| validate_password_dictionary_file    |       |
| validate_password_length             | 6     |
| validate_password_mixed_case_count   | 2     |
| validate_password_number_count       | 1     |
| validate_password_policy             | LOW   |
| validate_password_special_char_count | 1     |
+--------------------------------------+-------+
6 rows in set (0.00 sec)

 

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