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80 lines
2.8 KiB
Nix
80 lines
2.8 KiB
Nix
{ config, pkgs, ... }:
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{
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# Enable SSH server.
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services.openssh = {
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enable = true;
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# Forbid root login through SSH.
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settings.PermitRootLogin = "no";
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# Use authorized keys only.
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settings.PasswordAuthentication = false;
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};
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# Use NitroKey USB smartcard with SSH.
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# https://nixos.wiki/wiki/Nitrokey
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#
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# Restart gpg-agent after config change.
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# Otherwise there might be a gpg error about "no pinentry".
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# https://discourse.nixos.org/t/cant-get-gnupg-to-work-no-pinentry/15373/19
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# Not sure if this is needed: Reload udev rules.
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# sudo -- udevadm control --reload-rules && udevadm trigger
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#
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# Not sure if this is needed:
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# killall gpg-agent
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# TODO: gpg-agent pinentry problem
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# https://github.com/NixOS/nixpkgs/issues/97861
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#
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# gpgconf --check-programs
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#=> gpgconf: error running '/nix/store/lvsbmqy4dmlri22145hbr6799hgbnpnf-gnupg-2.4.0/bin/pinentry': probably not installed
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#
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# ssh -v nas
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#=> OpenSSH_9.3p2, OpenSSL 3.0.10 1 Aug 2023
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#=> debug1: Reading configuration data /home/yoda/.ssh/config
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#=> debug1: /home/yoda/.ssh/config line 67: Applying options for nas
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#=> debug1: /home/yoda/.ssh/config line 180: Applying options for *
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#=> debug1: Reading configuration data /etc/ssh/ssh_config
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#=> debug1: Executing command: '/nix/store/8fv91097mbh5049i9rglc73dx6kjg3qk-bash-5.2-p15/bin/bash -c '/nix/store/lvsbmqy4dmlri22145hbr6799hgbnpnf-gnupg-2.4.0/bin/gpg-connect-agent --quiet updatestartuptty /bye >/dev/null 2>&1''
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#
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#=> USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
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#=> yoda 2752 0.0 0.0 444812 3040 ? SLsl 16:09 0:00 /nix/store/lvsbmqy4dmlri22145hbr6799hgbnpnf-gnupg-2.4.0/bin/gpg-agent --supervised --pinentry-program /nix/store/8cvidvpwnwyxixlhqfaa5jlfndh2vir5-pinentry-1.2.1-curses/bin/pinentry
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# TESTING: Do all of this in one shell!
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# CREDITS: https://unix.stackexchange.com/a/250045/315162
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#
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# systemctl --user stop gpg-agent
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# systemctl --user stop gpg-agent.socket
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# systemctl --user stop gpg-agent-ssh.socket
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# eval $(gpg-agent --daemon --pinentry-program /nix/store/8cvidvpwnwyxixlhqfaa5jlfndh2vir5-pinentry-1.2.1-curses/bin/pinentry --enable-ssh-support --sh)
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# echo $SSH_AUTH_SOCK
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#=> /run/user/1000/gnupg/S.gpg-agent.ssh
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# gpg -d ./passphrase.txt.gpg
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#=> Works!
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# ssh nas
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#=> Works!
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services.udev.packages = [ pkgs.nitrokey-udev-rules ];
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programs = {
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ssh.startAgent = false;
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gnupg.agent = {
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enable = true;
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# ... Also sets SSH_AUTH_SOCK environment variable correctly.
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enableSSHSupport = true;
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pinentryFlavor = "curses";
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};
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};
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# users.users.yoda = {
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# packages = with pkgs; [
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# pinentry-curses
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# ];
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# };
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# environment.systemPackages = with pkgs; [
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# pinentry-curses
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# ];
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# Smartcard daemon.
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services.pcscd.enable = true;
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}
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