nixpkgs/nixos/modules/security/oath.nix

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# This module provides configuration for the OATH PAM modules.
{ lib, ... }:
with lib;
{
options = {
security.pam.oath = {
enable = mkOption {
type = types.bool;
default = false;
description = ''
Enable the OATH (one-time password) PAM module.
'';
};
digits = mkOption {
type = types.enum [ 6 7 8 ];
default = 6;
description = ''
Specify the length of the one-time password in number of
digits.
'';
};
window = mkOption {
type = types.int;
default = 5;
description = ''
Specify the number of one-time passwords to check in order
to accommodate for situations where the system and the
client are slightly out of sync (iteration for HOTP or time
steps for TOTP).
'';
};
usersFile = mkOption {
type = types.path;
default = "/etc/users.oath";
description = ''
Set the path to file where the user's credentials are
stored. This file must not be world readable!
'';
};
};
};
}