pyrox.dev
1{ config, lib, pkgs, ... }:
2
3with lib;
4
5{
6 options = {
7
8 nix.sshServe = {
9
10 enable = mkOption {
11 type = types.bool;
12 default = false;
13 description = "Whether to enable serving the Nix store as a binary cache via SSH.";
14 };
15
16 keys = mkOption {
17 type = types.listOf types.str;
18 default = [];
19 example = [ "ssh-dss AAAAB3NzaC1k... alice@example.org" ];
20 description = "A list of SSH public keys allowed to access the binary cache via SSH.";
21 };
22
23 };
24
25 };
26
27 config = mkIf config.nix.sshServe.enable {
28
29 users.extraUsers.nix-ssh = {
30 description = "Nix SSH substituter user";
31 uid = config.ids.uids.nix-ssh;
32 useDefaultShell = true;
33 };
34
35 services.openssh.enable = true;
36
37 services.openssh.extraConfig = ''
38 Match User nix-ssh
39 AllowAgentForwarding no
40 AllowTcpForwarding no
41 PermitTTY no
42 PermitTunnel no
43 X11Forwarding no
44 ForceCommand ${config.nix.package.out}/bin/nix-store --serve
45 Match All
46 '';
47
48 users.extraUsers.nix-ssh.openssh.authorizedKeys.keys = config.nix.sshServe.keys;
49
50 };
51}