MariaDB : SSL/TLS Setting2020/05/09

	Configure SSL/TLS Setting on MariaDB.
[1]	Get SSL Certificates, refer to here.
[2]	Configure MariaDB.

# copy certificates got in [1] and convert format for certificate key

root@www:~#

mkdir /var/lib/mysql/pki

root@www:~#

cp /etc/letsencrypt/live/www.srv.world/* /var/lib/mysql/pki/

root@www:~#

openssl rsa -in /var/lib/mysql/pki/privkey.pem -out /var/lib/mysql/pki/priv.key

root@www:~#

chown -R mysql. /var/lib/mysql/pki

root@www:~#

vi /etc/mysql/mariadb.conf.d/50-server.cnf

# line 98: add certificate

ssl-ca=/var/lib/mysql/pki/chain.pem
ssl-cert=/var/lib/mysql/pki/cert.pem
ssl-key=/var/lib/mysql/pki/privkey.pem

root@www:~#

systemctl restart mariadb

# verify

root@www:~#

mysql

Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 36
Server version: 10.3.22-MariaDB-1ubuntu1 Ubuntu 20.04

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        | NO                            |
| have_ssl            | YES                           |
| ssl_ca              | /var/lib/mysql/pki/chain.pem  |
| ssl_capath          |                               |
| ssl_cert            | /var/lib/mysql/pki/cert.pem   |
| ssl_cipher          |                               |
| ssl_crl             |                               |
| ssl_crlpath         |                               |
| ssl_key             | /var/lib/mysql/pki/priv.key   |
| version_ssl_library | YaSSL 2.4.4                   |
+---------------------+-------------------------------+
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 37
Server version: 10.3.22-MariaDB-1ubuntu1 Ubuntu 20.04

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    | DHE-RSA-AES256-SHA |
+---------------+--------------------+
1 row in set (0.001 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 38
Server version: 10.3.22-MariaDB-1ubuntu1 Ubuntu 20.04

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 39
Server version: 10.3.22-MariaDB-1ubuntu1 Ubuntu 20.04

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 debian 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 |
+--------+-----------+----------+
| root   | localhost |          |
| debian | %         | ANY      |
| ubuntu | %         |          |
+--------+-----------+----------+
3 rows in set (0.000 sec)

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

MariaDB [(none)]> select user,host,ssl_type from mysql.user; 
+--------+-----------+----------+
| user   | host      | ssl_type |
+--------+-----------+----------+
| root   | localhost |          |
| debian | %         | ANY      |
| ubuntu | %         | ANY      |
+--------+-----------+----------+
3 rows in set (0.000 sec)

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