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MariaDB : SSL/TLS Setting
2020/11/11
 
Configure SSL/TLS Setting on MariaDB.
[1]
Get SSL/TLS certificate or Create self signed certificate first.
It uses self signed certificate on this example.
[2] Configure MariaDB for SSL/TLS.
# copy certificates gotten in [1]

[root@www ~]#
mkdir /var/lib/mysql/pki

[root@www ~]#
cp /etc/pki/tls/certs/{server.crt,server.key,ca-bundle.crt} /var/lib/mysql/pki/

[root@www ~]#
chown -R mysql. /var/lib/mysql/pki
[root@www ~]#
vi /etc/my.cnf.d/mariadb-server.cnf
# add under [mysqld] section

[mysqld]
ssl-ca=/var/lib/mysql/pki/ca-bundle.crt
ssl-cert=/var/lib/mysql/pki/server.crt
ssl-key=/var/lib/mysql/pki/server.key
[root@www ~]#
systemctl restart mariadb
# verify settings

[root@www ~]#
mysql

Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 8
Server version: 10.4.16-MariaDB MariaDB Server

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

# OK if status is like follows
MariaDB [(none)]> show variables like '%ssl%'; 
+---------------------+----------------------------------+
| Variable_name       | Value                            |
+---------------------+----------------------------------+
| have_openssl        | YES                              |
| have_ssl            | YES                              |
| ssl_ca              | /var/lib/mysql/pki/ca-bundle.crt |
| ssl_capath          |                                  |
| ssl_cert            | /var/lib/mysql/pki/server.crt    |
| ssl_cipher          |                                  |
| ssl_crl             |                                  |
| ssl_crlpath         |                                  |
| ssl_key             | /var/lib/mysql/pki/server.key    |
| version_ssl_library | OpenSSL 1.1.1g FIPS  21 Apr 2020 |
+---------------------+----------------------------------+
10 rows in set (0.002 sec)
[3] To connect with SSL/TLS from Clients, connect with specifying [ssl] option.
[root@www ~]#
mysql --ssl

Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 9
Server version: 10.4.16-MariaDB MariaDB Server

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

# show status
MariaDB [(none)]> show status like 'ssl_cipher'; 
+---------------+------------------------+
| Variable_name | Value                  |
+---------------+------------------------+
| Ssl_cipher    | TLS_AES_256_GCM_SHA384 |
+---------------+------------------------+
1 row in set (0.002 sec)

MariaDB [(none)]> exit 
Bye

# for no SSL/TLS connection

[root@www ~]#
mysql

Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 10
Server version: 10.4.16-MariaDB MariaDB Server

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

# value is empty
MariaDB [(none)]> show status like 'ssl_cipher'; 
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| Ssl_cipher    |       |
+---------------+-------+
1 row in set (0.001 sec)
[4] To force require users to connect with SSL/TLS, set like follows.
[root@www ~]#
mysql

Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 11
Server version: 10.4.16-MariaDB MariaDB Server

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

# create a user who is required SSL/TLS
MariaDB [(none)]> create user redhat identified by 'password' require ssl; 
Query OK, 0 rows affected (0.00 sec)

# show status SSL/TLS required users set [ssl_type] [ANY]
MariaDB [(none)]> select user,host,ssl_type from mysql.user; 
+-------------+-----------+----------+
| User        | Host      | ssl_type |
+-------------+-----------+----------+
| mariadb.sys | localhost |          |
| root        | localhost |          |
| mysql       | localhost |          |
| redhat      | %         | ANY      |
| fedora      | %         |          |
+-------------+-----------+----------+
5 rows in set (0.002 sec)

# set SSL/TLS required to an existing user
MariaDB [(none)]> grant usage on *.* to 'fedora'@'%' require ssl; 
Query OK, 0 rows affected (0.00 sec)

MariaDB [(none)]> select user,host,ssl_type from mysql.user; 
+-------------+-----------+----------+
| User        | Host      | ssl_type |
+-------------+-----------+----------+
| mariadb.sys | localhost |          |
| root        | localhost |          |
| mysql       | localhost |          |
| redhat      | %         | ANY      |
| fedora      | %         | ANY      |
+-------------+-----------+----------+
5 rows in set (0.001 sec)
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