Amazon RDS documentation (http://aws.amazon.com/rds/faqs/#53) specifies that "Amazon RDS generates an SSL certificate for each [MySQL] DB Instance". I haven't been able to find any documentation on how to find the certificates and the certificates are nowhere to be found in the management console.
Where are the certificates?
You can get the AWS RDS certificate file information from the AWS Documentation guide itself
http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/CHAP_MySQL.html
Download the certificate from here
https://rds.amazonaws.com/doc/mysql-ssl-ca-cert.pem
Update - Amazon updated the SSL certificate, you can download the it from here : https://s3.amazonaws.com/rds-downloads/rds-combined-ca-bundle.pem
Use the following command to login into mysql
root@sathish:/usr/src# mysql -h awssathish.xxyyzz.eu-west-1.rds.amazonaws.com -u awssathish -p --ssl-ca=mysql-ssl-ca-cert.pem
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 22
Server version: 5.6.13-log MySQL Community Server (GPL)
Copyright (c) 2000, 2013, 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.
mysql>
mysql> GRANT USAGE ON *.* TO ‘awssathish’@’%’ REQUIRE SSL
Query OK, 0 rows affected (0.02 sec)
mysql>
mysql> show variables like "%ssl";
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| have_openssl | YES |
| have_ssl | YES |
+---------------+-------+
2 rows in set (0.00 sec)
mysql>
mysql> SHOW STATUS LIKE 'Ssl_cipher';
+---------------+------------+
| Variable_name | Value |
+---------------+------------+
| Ssl_cipher | AES256-SHA |
+---------------+------------+
1 row in set (0.01 sec)
mysql> exit
Bye
Where
awssathish.xxyyzz.eu-west-1.rds.amazonaws.com
is Endpoint of RDS,
awssathish
is the username of the rds server