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modules/wireguard-initrd: add module for wireguard in initrd

This commit is contained in:
clerie 2023-09-22 16:56:09 +02:00
parent 08600173b9
commit c46a031b39
3 changed files with 107 additions and 1 deletions
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9
hosts/zinc/configuration.nix
View File

@ -22,7 +22,7 @@
boot.initrd.network.ssh = {
enable = true;
port = 1022;
shell = "/bin/cryptsetup-askpass";
#shell = "/bin/cryptsetup-askpass";
authorizedKeys = config.users.users.clerie.openssh.authorizedKeys.keys;
hostKeys = [
"/var/src/secrets/initrd/ssh_host_ed25519_key"
@ -31,6 +31,13 @@
boot.initrd.kernelModules = [ "igc" ];
boot.kernelParams = [ "ip=dhcp" ];
boot.initrd.network.wireguard = {
enable = true;
ipv6s = [ "2a01:4f8:c0c:15f1::8110/128" ];
ipv4s = [ "10.20.30.110/32" ];
privateKeyFile = "/var/src/secrets/wireguard/wg-initrd";
};
networking.hostName = "zinc";
services.wg-clerie = {

1
modules/default.nix
View File

@ -15,5 +15,6 @@
./nixfiles
./update-from-hydra
./wg-clerie
./wireguard-initrd
];
}

98
modules/wireguard-initrd/default.nix Normal file
View File

@ -0,0 +1,98 @@
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.boot.initrd.network.wireguard;
in
{
options = {
boot.initrd.network.wireguard = {
enable = mkEnableOption "Wireguard in initrd";
privateKeyFile = mkOption {
type = with types; nullOr str;
default = null;
description = "Path to file containing private key for wireguard interface";
};
ipv6s = mkOption {
type = with types; listOf str;
default = [];
description = "IPv6 interface addresses";
};
ipv4s = mkOption {
type = with types; listOf str;
default = [];
description = "IPv4 interface addresses";
};
};
};
config = mkIf cfg.enable {
boot.initrd.kernelModules = [ "wireguard" ];
boot.initrd.extraUtilsCommands = ''
for BIN in ${pkgs.iproute2}/bin/*; do
copy_bin_and_libs $BIN
done
[ -f "$out/bin/wg" ] && rm "$out/bin/wg"
cp -pdv ${pkgs.wireguard-tools}/bin/.wg-wrapped $out/bin/wg
'';
boot.initrd.network.postCommands = ''
ip link add dev "wg-initrd" type wireguard
${concatMapStringsSep "\n" (ip: ''
ip address add "${ip}" dev "wg-initrd"
'') cfg.ipv6s}
${concatMapStringsSep "\n" (ip: ''
ip address add "${ip}" dev "wg-initrd"
'') cfg.ipv4s}
wg set "wg-initrd" private-key "/var/src/secrets/wireguard/wg-initrd"
ip link set up "wg-initrd"
wg set "wg-initrd" peer "2p1Jqs3bkXbXHFWE6vp1yxHIFoUaZQEARS2nJzbkuBA=" \
endpoint "$(ip route get 2a01:4f8:c0c:15f1::1 ipproto udp dport 51820 &>/dev/null && echo '[2a01:4f8:c0c:15f1::1]:51820' || echo '78.47.183.82:51820')" \
persistent-keepalive "25" \
allowed-ips "0.0.0.0/0,::/0,10.20.30.0/24,2a01:4f8:c0c:15f1::/113"
ip route add "::/0" dev "wg-initrd" table 1337
ip route add "0.0.0.0/0" dev "wg-initrd" table 1337
${concatMapStringsSep "\n" (ip: ''
ip -6 rule add from "${ip}" lookup 1337 prio 19000
ip -6 rule add from "${ip}" unreachable prio 19001
'') cfg.ipv6s}
ip -6 rule add from "2a01:4f8:c0c:15f1::1/128" ipproto udp dport 51820 lookup main prio 20000
ip -6 rule add from "2a01:4f8:c0c:15f1::1/128" ipproto udp dport 51820 unreachable prio 20001
ip -6 rule add lookup main prio 21000
ip -6 rule add lookup 1337 prio 21001
ip -6 rule add unreachable prio 21000
${concatMapStringsSep "\n" (ip: ''
ip -4 rule add from "${ip}" lookup 1337 prio 19000
ip -4 rule add from "${ip}" unreachable prio 19001
'') cfg.ipv4s}
ip -4 rule add from "78.47.183.82/32" ipproto udp dport 51820 lookup main prio 20000
ip -4 rule add from "78.47.183.82/32" ipproto udp dport 51820 unreachable prio 20001
ip -4 rule add lookup main prio 21000
ip -4 rule add lookup 1337 prio 21001
ip -4 rule add unreachable prio 21000
'';
boot.initrd.postMountCommands = ''
ip link del dev "wg-initrd"
ip -6 rule flush
ip -4 rule flush
'';
boot.initrd.secrets = {
"/var/src/secrets/wireguard/wg-initrd" = if cfg.privateKeyFile == null then config.age.secrets.wg-clerie.path else cfg.privateKeyFile;
};
};
}