MySQL 8.0 : SSL/TLS Setting2020/01/23

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

# copy certificates gotten in [1]

[root@www ~]#

cp /etc/letsencrypt/live/www.srv.world/* /etc/opt/rh/rh-mysql80/pki/

[root@www ~]#

chown -R mysql. /etc/opt/rh/rh-mysql80/pki

[root@www ~]#

vi /etc/opt/rh/rh-mysql80/my.cnf.d/mysql-server.cnf

# add under [mysqld] section

[mysqld]

ssl-ca=/etc/opt/rh/rh-mysql80/pki/chain.pem
ssl-cert=/etc/opt/rh/rh-mysql80/pki/cert.pem
ssl-key=/etc/opt/rh/rh-mysql80/pki/privkey.pem

[root@www ~]#

systemctl restart rh-mysql80-mysqld

# verify settings

[root@www ~]#

mysql -u root -p

Enter password:

Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 8.0.17 Source distribution

Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

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

# OK if status is like follows
mysql> show variables like '%ssl%'; 
+--------------------+----------------------------------------+
| Variable_name      | Value                                  |
+--------------------+----------------------------------------+
| have_openssl       | YES                                    |
| have_ssl           | YES                                    |
| mysqlx_ssl_ca      |                                        |
| mysqlx_ssl_capath  |                                        |
| mysqlx_ssl_cert    |                                        |
| mysqlx_ssl_cipher  |                                        |
| mysqlx_ssl_crl     |                                        |
| mysqlx_ssl_crlpath |                                        |
| mysqlx_ssl_key     |                                        |
| ssl_ca             | /etc/opt/rh/rh-mysql80/pki/chain.pem   |
| ssl_capath         |                                        |
| ssl_cert           | /etc/opt/rh/rh-mysql80/pki/cert.pem    |
| ssl_cipher         |                                        |
| ssl_crl            |                                        |
| ssl_crlpath        |                                        |
| ssl_fips_mode      | OFF                                    |
| ssl_key            | /etc/opt/rh/rh-mysql80/pki/privkey.pem |
+--------------------+----------------------------------------+
17 rows in set (0.01 sec)

[3]	To connect with SSL/TLS from Clients, connect with specifying [--ssl-mode] option.

[root@www ~]#

mysql -u root -p --ssl-mode=required --protocol=tcp

Enter password:

Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 10
Server version: 8.0.17 Source distribution

Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

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

# show status
mysql> show status like 'ssl_cipher'; 
+---------------+---------------------------+
| Variable_name | Value                     |
+---------------+---------------------------+
| Ssl_cipher    | DHE-RSA-AES128-GCM-SHA256 |
+---------------+---------------------------+
1 row in set (0.01 sec)

mysql> exit 
Bye

# for no SSL/TLS connection

[root@www ~]#

mysql -u root -p

Enter password:

Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 11
Server version: 8.0.17 Source distribution

Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

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

# value is empty
mysql> show status like 'ssl_cipher'; 
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| Ssl_cipher    |       |
+---------------+-------+
1 row in set (0.00 sec)

[4]	To force require users to connect with SSL/TLS, set like follows.

[root@www ~]#

mysql -u root -p

Enter password:

Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 12
Server version: 8.0.17 Source distribution

Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

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

# create a user who is required SSL/TLS
mysql> create user redhat identified by 'password' require ssl; 
Query OK, 0 rows affected (0.12 sec)

# show status SSL/TLS required users set [ssl_type] [ANY]
mysql> select user,host,ssl_type from mysql.user; 
+------------------+-----------+----------+
| user             | host      | ssl_type |
+------------------+-----------+----------+
| cent             | %         |          |
| redhat           | %         | ANY      |
| mysql.infoschema | localhost |          |
| mysql.session    | localhost |          |
| mysql.sys        | localhost |          |
| root             | localhost |          |
+------------------+-----------+----------+
6 rows in set (0.00 sec)

# set SSL/TLS required to an existing user
mysql> alter user 'cent'@'%' require ssl; 
Query OK, 0 rows affected (0.04 sec)

mysql> select user,host,ssl_type from mysql.user; 
+------------------+-----------+----------+
| user             | host      | ssl_type |
+------------------+-----------+----------+
| cent             | %         | ANY      |
| redhat           | %         | ANY      |
| mysql.infoschema | localhost |          |
| mysql.session    | localhost |          |
| mysql.sys        | localhost |          |
| root             | localhost |          |
+------------------+-----------+----------+
6 rows in set (0.00 sec)

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