It it possible to make
kinit ask Keychain for password and not me?
Actually it is possible. Let us say you have an account "bob" on the realm "MY.REAL.COM" with password "mypasswd". Then in a Terminal type on one single line
This will create an item in your default Keychain named "MY.REALM.COM (bob)" with your Kerberos credentials and kinit it will be authorized to access it. You can add as many
More details with
With only kinit, this is impossible.
You'd have to write or have someone else write a separate interface that uses the Keychain Services API to store and access your passwords.