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|
{
eapCerts,
wifi ? null,
}:
{ config, pkgs, ... }:
let
radiusDir =
let
eapConfig = builtins.toFile "eap.conf" ''
eap {
default_eap_type = tls
timer_expire = 60
ignore_unknown_eap_types = no
tls {
# Path to CA certificate
ca_file = ''${certdir}/ca.cert
# Path to server certificate and private key
certificate_file = ''${certdir}/server.cert
private_key_file = ''${certdir}/server.key
# Enable mutual authentication
require_client_cert = yes
# Cipher suite (example)
ciphers = "DEFAULT"
}
}
'';
clientsConfig = builtins.toFile "client.conf" ''
client localhost {
ipaddr = 127.0.0.1
secret = insecure
require_message_authenticator = no
}
'';
# sample users file, not used for eap-tls, only for e.g. eap-ttls
usersConfig = builtins.toFile "users.conf" ''
testuser Cleartext-Password := "supersecret"
'';
# this constructs the freeradius config directory
# it starts with the upstream config, then overwrites certain files
# and uses the generated certs from eapCerts
buildScript = pkgs.writeShellApplication {
name = "builder";
runtimeInputs = [ pkgs.coreutils ];
# https://www.shellcheck.net/wiki/SC2154 -- out is referenced but not assigned.
excludeShellChecks = [ "SC2154" ];
text = ''
cp --recursive ${pkgs.freeradius}/etc/* "$out"
chmod +w -R "$out"
cp --force ${eapCerts}/ca.cert "$out/certs/ca.cert"
cp --force ${eapCerts}/ca.key "$out/certs/ca.key"
cp --force ${eapCerts}/server.cert "$out/certs/server.cert"
cp --force ${eapCerts}/server.key "$out/certs/server.key"
cp --force ${eapConfig} "$out/mods-enabled/eap"
cp --force ${usersConfig} "$out/users"
cp --force ${clientsConfig} "$out/clients.conf"
'';
};
in
derivation {
name = "radius_dir";
builder = "${pkgs.bash}/bin/bash";
args = [ "${buildScript}/bin/builder" ];
inherit (pkgs) system;
};
inherit (pkgs) lib;
vlanIfs = lib.range 1 (lib.length config.virtualisation.vlans);
# The hostapd module is Wi-Fi focused, so retain a custom service for wired EAP tests.
wiredHostapdService =
let
hostapdConfig = builtins.toFile "hostapd.conf" ''
interface=eth1
driver=wired
logger_stdout=-1
logger_stdout_level=1
debug=2
dump_file=/tmp/hostapd.dump
ieee8021x=1
eap_reauth_period=3600
use_pae_group_addr=1
##### RADIUS configuration ####################################################
own_ip_addr=127.0.0.1
nas_identifier=ap.example.com
auth_server_addr=127.0.0.1
auth_server_port=1812
auth_server_shared_secret=insecure
'';
in
{
description = "IEEE 802.11 Host Access-Point Daemon";
wantedBy = [ "multi-user.target" ];
serviceConfig = {
ExecStart = "${pkgs.hostapd}/bin/hostapd ${hostapdConfig}";
Restart = "always";
ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
RuntimeDirectory = "hostapd";
};
};
in
{
virtualisation.vlans = [
1
2
3
];
boot.kernel.sysctl."net.ipv6.conf.all.forwarding" = true;
networking = {
useDHCP = false;
useNetworkd = true;
firewall.checkReversePath = true;
firewall.allowedUDPPorts = [ 547 ];
interfaces = lib.mkOverride 0 (
lib.listToAttrs (
lib.forEach vlanIfs (
n:
lib.nameValuePair "eth${toString n}" {
ipv4.addresses = [
{
address = "192.168.${toString n}.1";
prefixLength = 24;
}
];
ipv6.addresses = [
{
address = "fd00:1234:5678:${toString n}::1";
prefixLength = 64;
}
];
}
)
)
);
};
services.freeradius = {
enable = true;
configDir = radiusDir;
debug = true;
};
services.hostapd = lib.mkIf (wifi != null) {
enable = true;
radios.${wifi.interface} = {
channel = 1;
networks.${wifi.interface} = {
inherit (wifi) ssid;
authentication.mode = "none";
settings = {
ieee8021x = true;
wpa = 2;
wpa_key_mgmt = "WPA-EAP";
rsn_pairwise = "CCMP";
eap_reauth_period = 3600;
own_ip_addr = "127.0.0.1";
nas_identifier = "ap.example.com";
auth_server_addr = "127.0.0.1";
auth_server_port = 1812;
auth_server_shared_secret = "insecure";
};
};
};
};
systemd.services.hostapd =
if wifi == null then
wiredHostapdService
else
{
after = [
"freeradius.service"
"vwifi-client.service"
];
wants = [
"freeradius.service"
"vwifi-client.service"
];
};
}
|
