151 lines
4.4 KiB
Nix
151 lines
4.4 KiB
Nix
# tcsd daemon.
|
|
|
|
{ config, pkgs, lib, ... }:
|
|
|
|
with lib;
|
|
let
|
|
|
|
cfg = config.services.tcsd;
|
|
|
|
tcsdConf = pkgs.writeText "tcsd.conf" ''
|
|
port = 30003
|
|
num_threads = 10
|
|
system_ps_file = ${cfg.stateDir}/system.data
|
|
# This is the log of each individual measurement done by the system.
|
|
# By re-calculating the PCR registers based on this information, even
|
|
# finer details about the measured environment can be inferred than
|
|
# what is available directly from the PCR registers.
|
|
firmware_log_file = /sys/kernel/security/tpm0/binary_bios_measurements
|
|
kernel_log_file = /sys/kernel/security/ima/binary_runtime_measurements
|
|
firmware_pcrs = ${cfg.firmwarePCRs}
|
|
kernel_pcrs = ${cfg.kernelPCRs}
|
|
platform_cred = ${cfg.platformCred}
|
|
conformance_cred = ${cfg.conformanceCred}
|
|
endorsement_cred = ${cfg.endorsementCred}
|
|
#remote_ops = create_key,random
|
|
#host_platform_class = server_12
|
|
#all_platform_classes = pc_11,pc_12,mobile_12
|
|
'';
|
|
|
|
in
|
|
{
|
|
|
|
###### interface
|
|
|
|
options = {
|
|
|
|
services.tcsd = {
|
|
|
|
enable = mkOption {
|
|
default = false;
|
|
type = types.bool;
|
|
description = ''
|
|
Whether to enable tcsd, a Trusted Computing management service
|
|
that provides TCG Software Stack (TSS). The tcsd daemon is
|
|
the only portal to the Trusted Platform Module (TPM), a hardware
|
|
chip on the motherboard.
|
|
'';
|
|
};
|
|
|
|
user = mkOption {
|
|
default = "tss";
|
|
type = types.string;
|
|
description = "User account under which tcsd runs.";
|
|
};
|
|
|
|
group = mkOption {
|
|
default = "tss";
|
|
type = types.string;
|
|
description = "Group account under which tcsd runs.";
|
|
};
|
|
|
|
stateDir = mkOption {
|
|
default = "/var/lib/tpm";
|
|
type = types.path;
|
|
description = ''
|
|
The location of the system persistent storage file.
|
|
The system persistent storage file holds keys and data across
|
|
restarts of the TCSD and system reboots.
|
|
'';
|
|
};
|
|
|
|
firmwarePCRs = mkOption {
|
|
default = "0,1,2,3,4,5,6,7";
|
|
type = types.string;
|
|
description = "PCR indices used in the TPM for firmware measurements.";
|
|
};
|
|
|
|
kernelPCRs = mkOption {
|
|
default = "8,9,10,11,12";
|
|
type = types.string;
|
|
description = "PCR indices used in the TPM for kernel measurements.";
|
|
};
|
|
|
|
platformCred = mkOption {
|
|
default = "${cfg.stateDir}/platform.cert";
|
|
type = types.path;
|
|
description = ''
|
|
Path to the platform credential for your TPM. Your TPM
|
|
manufacturer may have provided you with a set of credentials
|
|
(certificates) that should be used when creating identities
|
|
using your TPM. When a user of your TPM makes an identity,
|
|
this credential will be encrypted as part of that process.
|
|
See the 1.1b TPM Main specification section 9.3 for information
|
|
on this process. '';
|
|
};
|
|
|
|
conformanceCred = mkOption {
|
|
default = "${cfg.stateDir}/conformance.cert";
|
|
type = types.path;
|
|
description = ''
|
|
Path to the conformance credential for your TPM.
|
|
See also the platformCred option'';
|
|
};
|
|
|
|
endorsementCred = mkOption {
|
|
default = "${cfg.stateDir}/endorsement.cert";
|
|
type = types.path;
|
|
description = ''
|
|
Path to the endorsement credential for your TPM.
|
|
See also the platformCred option'';
|
|
};
|
|
};
|
|
|
|
};
|
|
|
|
###### implementation
|
|
|
|
config = mkIf cfg.enable {
|
|
|
|
environment.systemPackages = [ pkgs.trousers ];
|
|
|
|
# system.activationScripts.tcsd =
|
|
# ''
|
|
# chown ${cfg.user}:${cfg.group} ${tcsdConf}
|
|
# '';
|
|
|
|
systemd.services.tcsd = {
|
|
description = "TCSD";
|
|
after = [ "systemd-udev-settle.service" ];
|
|
wantedBy = [ "multi-user.target" ];
|
|
path = [ pkgs.trousers ];
|
|
preStart =
|
|
''
|
|
mkdir -m 0700 -p ${cfg.stateDir}
|
|
chown -R ${cfg.user}:${cfg.group} ${cfg.stateDir}
|
|
'';
|
|
serviceConfig.ExecStart = "${pkgs.trousers}/sbin/tcsd -f -c ${tcsdConf}";
|
|
};
|
|
|
|
users.extraUsers = optionalAttrs (cfg.user == "tss") (singleton
|
|
{ name = "tss";
|
|
group = "tss";
|
|
uid = config.ids.uids.tss;
|
|
});
|
|
|
|
users.extraGroups = optionalAttrs (cfg.group == "tss") (singleton
|
|
{ name = "tss";
|
|
gid = config.ids.gids.tss;
|
|
});
|
|
};
|
|
}
|