nix/nixos/common/modules/ssh-luks.nix

{ ... }: {
    # https://nixos.wiki/wiki/Remote_LUKS_Unlocking
    # Unlock command:
    # ssh root@<Local_IP_Address> "Password"

    boot.kernelParams = [ "ip=dhcp" ];

    boot.initrd = {
        enable = true;
        systemd.users.root.shell = "/bin/systemd-tty-ask-password-agent";
        availableKernelModules = [ "cdc_ncm" ];
        network.enable = true;
        network.ssh = {
            enable = true;
            port = 22;
            authorizedKeys = [
                # (Thu Dec 28 19:30:06 JST 2023) albert@framework-server
                ''ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIAODamRCvyVOGmMSMXWdUzjcM2GsApizCvXEWKHiKhGk albert@framework-server''
                # (Fri Dec 15 09:34:02 AM UTC 2023) albert@piaware-rpi4
                ''ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINR8PCfKOTArLemqmnHom4vWJ6u8wrlpG6/gSqeYo/qD albert@piaware-rpi4''
                # (Fri Dec 15 11:40:53 AM UTC 2023) albert@backups-rpi4
                ''ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGNkKoS32K487JaFza9TUFwrjwe9P7SNIHbVNxhzmRcI albert@backups-rpi4''
                # (Tue Feb 20 09:20:39 PM JST 2024) albert@nixos-framework
                ''ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMAJLaC+NJQYfrWlerUj8yMkAIofBGMOWQB4mU/ncDpz albert@nixos-framework''
                # (Sat Apr 27 05:28:13 PM PDT 2024) albert@bakersfield-rpi4
                ''ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJm3bTcalJgoZt7t5FqFrJl7ZYlC09ew2QWUVF6w1Iih albert@bakersfield-rpi4''
                # (Sat Jul 27 12:34:43 PM JST 2024) albert@nixos-desktop
                ''ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMrfwK60FYqUwvUwRuI3pwMnVX28aeuOvRPCMLNOi5IT albert@nixos-desktop''
            ];
            hostKeys = [ 
                # CAUTION:  You WANT to generate a new key.  This is stored plaintext in /boot
                # Generate new keys with:
                #   ssh-keygen -t rsa -N "" -f /boot/ssh_host_rsa_key
                "/boot/ssh_host_rsa_key" 
            ];
        };
    };
}