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|
{
config,
lib,
pkgs,
hosts,
...
}: let
cfg = config.collinux.services.sshd;
in {
config = lib.mkIf cfg.enable {
networking.firewall.allowedTCPPorts = lib.optional cfg.public cfg.port;
services.openssh = {
enable = true;
allowSFTP = true;
hostKeys = [
{
path = "/etc/ssh/ssh_host_ed25519_key";
type = "ed25519";
}
];
listenAddresses = [
{
addr =
if cfg.public
then "0.0.0.0"
else "127.0.0.1";
port = cfg.port;
}
];
# Lock down everything by default
settings = {
PermitRootLogin = "no";
PasswordAuthentication = false;
PubkeyAuthentication = false;
KbdInteractiveAuthentication = false;
AllowAgentForwarding = false;
};
extraConfig = lib.concatStringsSep "\n" [
"Match LocalPort ${toString cfg.port}"
(
if cfg.conf.otp
then ''
ChallengeResponseAuthentication yes
PubkeyAuthentication yes
KbdInteractiveAuthentication yes
AuthenticationMethods publickey,keyboard-interactive:pam
''
else ''
PubkeyAuthentication yes
AuthenticationMethods publickey
''
)
(lib.optionalString cfg.conf.rootLogin "PermitRootLogin yes")
];
};
security.pam.services = lib.optionalAttrs cfg.conf.otp {
login.googleAuthenticator.enable = true;
sshd.text = ''
account required pam_unix.so
auth required ${pkgs.google-authenticator}/lib/security/pam_google_authenticator.so nullok no_increment_hotp
auth sufficient pam_permit.so
session required pam_env.so conffile=/etc/pam/environment readenv=0
session required pam_unix.so
session required pam_loginuid.so
session optional ${pkgs.systemd}/lib/security/pam_systemd.so
'';
};
users.users = let
k.openssh.authorizedKeys.keys =
hosts
|> builtins.mapAttrs (_: data: data.user_pubkey or null)
|> builtins.attrValues
|> builtins.filter (x: x != null);
in {
${config.collinux.user.name} = k;
"root" = lib.mkIf cfg.conf.rootLogin k;
};
systemd.services."openssh" = {
after = lib.mkAfter ["network-online.target"];
wants = lib.mkAfter ["network-online.target"];
};
};
}
|
