Himitsu is a secret storage system for Unix systems. It is suitable for storing passwords, private keys, and so on.
$ make # make install
You also need a prompter. Try one of these:
Begin by initializing a keystore:
Then fire up the daemon:
$ himitsud Please enter your passphrase to unlock the keystore:
Then use hiq(1) to interact with it.
The himitsu package provides a "himitsu" Hare module which provides some support code for integrations such as new prompters and agents. Consult haredoc for usage details.