niksos/modules/services/ssh.nix

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2023-10-13 21:04:24 +02:00
{
config,
lib,
pkgs,
...
}: with lib; let
cfg = config.myOptions.services.ssh;
in {
options.myOptions.services.ssh = {
daemon = mkOption {
description = "sshd options";
type = with types; submodule {
options = {
enable = mkEnableOption "enable sshd";
passwordAuth = mkOption {
description = "allow password auth";
default = false;
type = bool;
};
allowRoot = mkOption {
description = "allow root login";
default = false;
type = bool;
};
};
};
};
agent = mkOption {
description = "ssh agent options";
type = with types; submodule {
options = {
enable = mkEnableOption "enable ssh-agent";
hostAliases = mkOption {
description = "host aliases";
type = with types; attrsOf (submodule {
options = {
hostName = mkOption {
description = "hostname to ssh into";
type = types.str;
};
user = mkOption {
description = "ssh user";
type = types.str;
default = "git";
};
identityFile = mkOption {
description = "path to the private key";
type = types.path;
};
identitiesOnly = mkOption {
description = "whether ssh should not use additional identities offered by ssh-agent";
type = types.bool;
default = true;
};
};
});
};
};
};
};
};
config = mkMerge [
(mkIf cfg.daemon.enable {
services.openssh = {
enable = true;
settings = {
PasswordAuthentication = false;
PermitRootLogin = "no";
};
};
})
(mkIf cfg.agent.enable {
programs.ssh.extraConfig = ''
AddKeysToAgent yes
${concatStrings (mapAttrsToList (name: value: ''
Host ${name}
HostName ${value.hostName}
User ${value.user}
IdentityFile ${value.identityFile}
IdentitiesOnly ${if value.identitiesOnly then "yes" else "no"}
'') cfg.agent.hostAliases)}
'';
systemd.user.services.ssh-agent = {
enable = true;
description = "SSH key agent";
serviceConfig = {
Type = "simple";
ExecStart = "${pkgs.openssh}/bin/ssh-agent -D -a $SSH_AUTH_SOCK";
};
environment = {
SSH_AUTH_SOCK = "%t/ssh-agent.socket";
DISPLAY = ":0";
};
wantedBy = [ "default.target" ];
};
#environment.sessionVariables = {
# SSH_AUTH_SOCK = "\$XDG_RUNTIME_DIR/ssh-agent.socket";
#};
})
];
}