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|
{
systemdStage1,
lib,
pkgs,
...
}:
let
keyfile = pkgs.writeText "luks-keyfile" ''
MIGHAoGBAJ4rGTSo/ldyjQypd0kuS7k2OSsmQYzMH6TNj3nQ/vIUjDn7fqa3slt2
gV6EK3TmTbGc4tzC1v4SWx2m+2Bjdtn4Fs4wiBwn1lbRdC6i5ZYCqasTWIntWn+6
FllUkMD5oqjOR/YcboxG8Z3B5sJuvTP9llsF+gnuveWih9dpbBr7AgEC
'';
in
{
name = "initrd-luks-empty-passphrase";
nodes.machine =
{ pkgs, ... }:
{
virtualisation = {
emptyDiskImages = [ 512 ];
useBootLoader = true;
useEFIBoot = true;
# This requires to have access
# to a host Nix store as
# the new root device is /dev/vdb
# an empty 512MiB drive, containing no Nix store.
mountHostNixStore = true;
};
boot.loader.systemd-boot.enable = true;
boot.initrd.systemd = {
enable = systemdStage1;
emergencyAccess = lib.mkIf systemdStage1 true;
};
environment.systemPackages = with pkgs; [ cryptsetup ];
specialisation.boot-luks-wrong-keyfile.configuration = {
boot.initrd.luks.devices = lib.mkVMOverride {
cryptroot = {
device = "/dev/vdb";
keyFile = "/etc/cryptroot.key";
tryEmptyPassphrase = true;
fallbackToPassword = !systemdStage1;
};
};
virtualisation.rootDevice = "/dev/mapper/cryptroot";
boot.initrd.secrets."/etc/cryptroot.key" = keyfile;
};
specialisation.boot-luks-missing-keyfile.configuration = {
boot.initrd.luks.devices = lib.mkVMOverride {
cryptroot = {
device = "/dev/vdb";
keyFile = "/etc/cryptroot.key";
tryEmptyPassphrase = true;
fallbackToPassword = !systemdStage1;
};
};
virtualisation.rootDevice = "/dev/mapper/cryptroot";
};
};
testScript =
{ nodes, ... }:
let
toplevel = nodes.machine.system.build.toplevel;
boot-luks-missing-keyfile =
nodes.machine.specialisation.boot-luks-missing-keyfile.configuration.system.build.toplevel;
boot-luks-wrong-keyfile =
nodes.machine.specialisation.boot-luks-wrong-keyfile.configuration.system.build.toplevel;
in
# python
''
# Encrypt key with empty key so boot should try keyfile and then fallback to empty passphrase
def grub_select_boot_luks_wrong_key_file():
"""
Selects "boot-luks" from the GRUB menu
to trigger a login request.
"""
machine.send_monitor_command("sendkey down")
machine.send_monitor_command("sendkey down")
machine.send_monitor_command("sendkey ret")
def grub_select_boot_luks_missing_key_file():
"""
Selects "boot-luks" from the GRUB menu
to trigger a login request.
"""
machine.send_monitor_command("sendkey down")
machine.send_monitor_command("sendkey ret")
# Create encrypted volume
machine.wait_for_unit("multi-user.target")
machine.succeed("echo "" | cryptsetup luksFormat /dev/vdb --batch-mode")
machine.succeed("echo "" | cryptsetup luksOpen /dev/vdb cryptroot")
machine.succeed("mkfs.ext4 /dev/mapper/cryptroot")
machine.succeed("${boot-luks-wrong-keyfile}/bin/switch-to-configuration boot")
machine.succeed("sync")
machine.crash()
# Check if rootfs is on /dev/mapper/cryptroot
machine.wait_for_unit("multi-user.target")
assert "/dev/mapper/cryptroot on / type ext4" in machine.succeed("mount")
# Choose boot-luks-missing-keyfile specialisation
machine.succeed(
"mkdir -p /nix/var/nix/profiles",
"ln -sfn ${toplevel} /nix/var/nix/profiles/system-1-link",
"ln -sfn system-1-link /nix/var/nix/profiles/system",
)
machine.succeed("${boot-luks-missing-keyfile}/bin/switch-to-configuration boot")
machine.succeed("sync")
machine.crash()
# Check if rootfs is on /dev/mapper/cryptroot
machine.wait_for_unit("multi-user.target")
assert "/dev/mapper/cryptroot on / type ext4" in machine.succeed("mount")
'';
}
|
