Spring Cloud Config Encrypt the datasource password when using JDBC backend

Basically, as the title says, when using JDBC backend on the config server, how can I encrypt the datasource password?

The simplest way seems to be using encrypt.key for symmetric key encryption/decryption but it will be included in the source code. For asymmetric key encryption/decryption, seems that RSA key can be used.

However, if I use other mechanism, for example the key is in a key vault, how can I extend Spring and implement it myself?

If it is something impossible today, please treat this as a feature request. Thank you.

Comment From: blackr1234

I figured it out. Instead of using {cipher}, I can have my own DataSourceProperties bean that takes username and password from other sources.