Using an ssh-agent, or how to type your ssh password once, safely. If you work a lot on linux and use ssh often, you quickly realize that typing your password every time you connect to a remote host gets annoying. Not only that, it is not the best solution in terms of security either. Regarding the configuration file, you may use a different configuration file or use.ssh/config and write your own code to parse that file and get the password for a given user and host.
Pages for mac table of contents.
Ssh Config File Password
Virtualbox extension pack for mac.
Ssh Config File Example