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nixpkgs/nixos/modules/services/security/haveged.nix
Silvan Mosberger d9d87c5196 treewide: format all inactive Nix files
After final improvements to the official formatter implementation,
this commit now performs the first treewide reformat of Nix files using it.
This is part of the implementation of RFC 166.

Only "inactive" files are reformatted, meaning only files that
aren't being touched by any PR with activity in the past 2 months.
This is to avoid conflicts for PRs that might soon be merged.
Later we can do a full treewide reformat to get the rest,
which should not cause as many conflicts.

A CI check has already been running for some time to ensure that new and
already-formatted files are formatted, so the files being reformatted here
should also stay formatted.

This commit was automatically created and can be verified using

    nix-build https://github.com/infinisil/treewide-nixpkgs-reformat-script/archive/a08b3a4d199c6124ac5b36a889d9099b4383463f.tar.gz \
      --argstr baseRev 0128fbb0a5
    result/bin/apply-formatting $NIXPKGS_PATH
2024-12-10 20:29:24 +01:00

93 lines
2.2 KiB
Nix

{
config,
lib,
pkgs,
...
}:
with lib;
let
cfg = config.services.haveged;
in
{
###### interface
options = {
services.haveged = {
enable = mkEnableOption ''
haveged entropy daemon, which refills /dev/random when low.
NOTE: does nothing on kernels newer than 5.6
'';
# source for the note https://github.com/jirka-h/haveged/issues/57
refill_threshold = mkOption {
type = types.int;
default = 1024;
description = ''
The number of bits of available entropy beneath which
haveged should refill the entropy pool.
'';
};
};
};
config = mkIf cfg.enable {
# https://github.com/jirka-h/haveged/blob/a4b69d65a8dfc5a9f52ff8505c7f58dcf8b9234f/contrib/Fedora/haveged.service
systemd.services.haveged = {
description = "Entropy Daemon based on the HAVEGE algorithm";
unitConfig = {
Documentation = "man:haveged(8)";
DefaultDependencies = false;
ConditionKernelVersion = "<5.6";
};
wantedBy = [ "sysinit.target" ];
after = [ "systemd-tmpfiles-setup-dev.service" ];
before = [
"sysinit.target"
"shutdown.target"
"systemd-journald.service"
];
serviceConfig = {
ExecStart = "${pkgs.haveged}/bin/haveged -w ${toString cfg.refill_threshold} --Foreground -v 1";
Restart = "always";
SuccessExitStatus = "137 143";
SecureBits = "noroot-locked";
CapabilityBoundingSet = [
"CAP_SYS_ADMIN"
"CAP_SYS_CHROOT"
];
# We can *not* set PrivateTmp=true as it can cause an ordering cycle.
PrivateTmp = false;
PrivateDevices = true;
ProtectSystem = "full";
ProtectHome = true;
ProtectHostname = true;
ProtectKernelLogs = true;
ProtectKernelModules = true;
RestrictNamespaces = true;
RestrictRealtime = true;
LockPersonality = true;
MemoryDenyWriteExecute = true;
SystemCallArchitectures = "native";
SystemCallFilter = [
"@system-service"
"newuname"
"~@mount"
];
SystemCallErrorNumber = "EPERM";
};
};
};
}