94 lines
2.3 KiB
Nix
94 lines
2.3 KiB
Nix
{
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config,
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lib,
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pkgs,
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...
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}:
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let
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ccfg = import ../config.nix;
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cfg_path = [
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ccfg.custom_config_key
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"programs"
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"ssh"
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];
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cfg = lib.attrsets.getAttrFromPath cfg_path config;
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in
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{
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options =
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{ }
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// lib.attrsets.setAttrByPath cfg_path {
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enable = lib.mkEnableOption "ssh";
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sshPortOpen = lib.mkOption {
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type = lib.types.bool;
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default = true;
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description = "Open the ssh port.";
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};
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fail2Ban = lib.mkOption {
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type = lib.types.bool;
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default = true;
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description = "Enable fail2ban.";
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};
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allowRootPasswordLogin = lib.mkOption {
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type = lib.types.bool;
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default = false;
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description = "Allow root password login.";
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};
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};
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config = lib.mkIf cfg.enable {
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environment.systemPackages = with pkgs; [
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openssh
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autossh
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];
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# Use fail2ban
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services.fail2ban = lib.mkIf cfg.fail2Ban {
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enable = true;
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};
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# Open ports in the firewall if enabled.
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networking.firewall.allowedTCPPorts = lib.mkIf cfg.sshPortOpen [
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22 # sshd
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];
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# Enable the OpenSSH daemon.
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services.openssh = {
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enable = true;
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settings = {
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LogLevel = "VERBOSE";
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PermitRootLogin = "yes";
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PasswordAuthentication = if cfg.allowRootPasswordLogin then true else false;
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};
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};
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# Ensure SSH key pair generation for non-root users
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systemd.services = lib.mapAttrs' (name: _: {
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name = "generate_ssh_key_${name}";
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value = {
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description = "Generate SSH key pair for ${name}";
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wantedBy = [ "multi-user.target" ];
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serviceConfig = {
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User = name;
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Type = "oneshot";
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};
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script = ''
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#!/run/current-system/sw/bin/bash
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if [ ! -f /home/${name}/.ssh/id_ed25519 ]; then
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if [ -v DRY_RUN ]; then
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echo "DRY_RUN is set. Would generate SSH key for ${name}.";
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else
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echo "Generating SSH key for ${name}.";
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mkdir -p /home/${name}/.ssh;
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chmod 700 /home/${name}/.ssh;
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/run/current-system/sw/bin/ssh-keygen -t ed25519 -f /home/${name}/.ssh/id_ed25519 -N "";
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fi
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else
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echo "SSH key already exists for ${name}.";
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fi
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'';
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};
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}) config.mods.common.users;
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};
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}
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