How to avoid storing credentials to connect to Oracle with JDBC?
Is it possible to setup a JDBC connection to Oracle without providing username/password information in a configuration file (or in any other standard readable location)?
Typically applications have a configuration file that contains setup parameters to connect to a database. Some DBAs have problems with the fact that usernames and passwords are in clear text in config files.
I don't think this is possible with Oracle and JDBC, but I need some confirmation...
A possible compromise is to encrypt the password in the config file and decrypt it before setting up the connection. Of course, the decryption key should not be in the same config file. This will only solve accidental opening of the config file by unauthorized users.
Answer
You may want to try Kerberos which can use the OS user's credentials and adding the OS user to the database as identified externally. Make sure that you use Kerberos and not the old way of doing this, which had serious security issues.
For Kerberos support you would need the advanced security option and a recent JDBC driver, probably 11g version. Before trying to get it to work in Java, try it out in Sql*Plus using '/' as username and empty password. "select user from dual" should give you user@domain. You may also find that there is a fundamental difference between using thin or OCI driver when it comes to Kerberos configuration.