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|
{
lib,
pkgs,
config,
...
}:
let
cfg = config.services.drasl;
format = pkgs.formats.toml { };
filterAttrs = x: lib.filterAttrs (n: v: n != "ClientSecretFile" || v != null) x;
getIndex =
item:
builtins.toString (lib.lists.findFirstIndex (x: x == item) null cfg.settings.RegistrationOIDC);
secretFiles = lib.filter (
x: lib.hasAttr "ClientSecretFile" (filterAttrs x)
) cfg.settings.RegistrationOIDC;
settings = format.generate "drasl-config.toml" (
if cfg.settings.RegistrationOIDC == [ ] then
lib.filterAttrs (n: v: n != "RegistrationOIDC" || v != [ ]) cfg.settings
else
lib.recursiveUpdate cfg.settings {
RegistrationOIDC = map (
x:
if lib.hasAttr "ClientSecretFile" (filterAttrs x) then
lib.recursiveUpdate (filterAttrs x) {
ClientSecretFile = "$CREDENTIALS_DIRECTORY/${getIndex x}";
}
else
filterAttrs x
) cfg.settings.RegistrationOIDC;
}
);
in
{
options.services.drasl = {
enable = lib.mkEnableOption "Drasl";
package = lib.mkPackageOption pkgs "drasl" { };
enableDebug = lib.mkEnableOption "debugging";
settings = lib.mkOption {
description = ''
Configuration for Drasl. See the
[Drasl documentation](https://github.com/unmojang/drasl/blob/master/doc/configuration.md)
for possible options.
'';
type = lib.types.submodule {
freeformType = format.type;
options = {
RegistrationOIDC = lib.mkOption {
default = [ ];
description = "List of OpenID connect providers.";
type = lib.types.listOf (
lib.types.submodule {
freeformType = format.type;
options = {
ClientSecretFile = lib.mkOption {
default = null;
description = ''
Path to a file containing the OIDC client secret.
::: {.note}
The NixOS module will automatically load this file using
systemd's LoadCredential. Make sure this file is only
readable by the root user.
:::
'';
type = lib.types.nullOr lib.types.path;
};
};
}
);
};
};
};
};
};
config = lib.mkIf cfg.enable {
assertions = [
{
assertion = lib.allUnique cfg.settings.RegistrationOIDC;
message = "All items in `services.drasl.settings.RegistrationOIDC` must be unique.";
}
{
assertion = lib.all (
x: (lib.hasAttr "ClientSecretFile" (filterAttrs x)) -> !(lib.hasAttr "ClientSecret" (filterAttrs x))
) cfg.settings.RegistrationOIDC;
message =
"Do not set both `services.drasl.settings.RegistrationOIDC.*.ClientSecret` "
+ "and `services.drasl.settings.RegistrationOIDC.*.ClientSecretFile`";
}
];
systemd.services.drasl = {
description = "Drasl";
after = [
"network-online.target"
"nss-lookup.target"
];
wants = [ "network-online.target" ];
wantedBy = [ "multi-user.target" ];
environment = lib.mkIf cfg.enableDebug { DRASL_DEBUG = "1"; };
serviceConfig = {
ExecStart = "${lib.getExe cfg.package} -config ${settings}";
DynamicUser = true;
RuntimeDirectory = "drasl";
RuntimeDirectoryMode = "0700";
StateDirectory = "drasl";
LoadCredential = lib.mkIf (secretFiles != [ ]) (
map (x: "${getIndex x}:${x.ClientSecretFile}") secretFiles
);
# Hardening
LockPersonality = true;
MemoryDenyWriteExecute = true;
NoNewPrivileges = true;
PrivateDevices = true;
PrivateMounts = true;
ProtectClock = true;
ProtectControlGroups = true;
ProtectHome = true;
ProtectHostname = true;
ProtectKernelLogs = true;
ProtectKernelModules = true;
ProtectKernelTunables = true;
RemoveIPC = true;
RestrictRealtime = true;
RestrictSUIDSGID = true;
CapabilityBoundingSet = "CAP_NET_BIND_SERVICE";
AmbientCapabilities = "CAP_NET_BIND_SERVICE";
PrivateTmp = "disconnected";
ProcSubset = "pid";
ProtectProc = "invisible";
ProtectSystem = "strict";
RestrictAddressFamilies = [
"AF_INET"
"AF_INET6"
];
RestrictNamespaces = [
"~cgroup"
"~ipc"
"~mnt"
"~net"
"~pid"
"~user"
"~uts"
];
SystemCallArchitectures = "native";
SystemCallFilter = [
"~@clock"
"~@cpu-emulation"
"~@debug"
"~@module"
"~@mount"
"~@obsolete"
"~@privileged"
"~@raw-io"
"~@reboot"
"~@resources"
"~@swap"
];
UMask = "0077";
};
};
};
meta.maintainers = with lib.maintainers; [
evan-goode
ungeskriptet
];
}
|
