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bootloader: signature checks are in!

master
parent
commit
bee46e6176
Signed by: govanify GPG Key ID: DE62E1E2A6145556
8 changed files with 1647 additions and 82 deletions
  1. +0
    -2
      common/default.nix
  2. +2
    -2
      common/graphical.nix
  3. +7
    -2
      common/sandboxing.nix
  4. +39
    -74
      component/bootloader.nix
  5. +0
    -2
      machines/alastor/hardware.nix
  6. +9
    -0
      overlays/grub/README.md
  7. +836
    -0
      overlays/grub/grub.nix
  8. +754
    -0
      overlays/grub/install-grub.pl

+ 0
- 2
common/default.nix View File

@ -57,8 +57,6 @@
modules.navi.bootloader = {
enable = true;
# until sigcheck is in
no_mercy = false;
};
}

+ 2
- 2
common/graphical.nix View File

@ -284,10 +284,10 @@ in
# GTK theme
home.file.".local/share/icons/default".source = "${pkgs.breeze-qt5}/share/icons/breeze_cursors";
#home.file.".local/share/icons/default".source = "${pkgs.breeze-qt5}/share/icons/breeze_cursors";
#gtk-icon-theme-name=breeze-dark
home.file.".config/gtk-3.0/settings.ini".text = ''
[Settings]
gtk-icon-theme-name=breeze-dark
gtk-theme-name=Breeze-Dark
gtk-application-prefer-dark-theme = true
gtk-cursor-theme-name=breeze_cursors

+ 7
- 2
common/sandboxing.nix View File

@ -1,5 +1,10 @@
{ config, pkgs, ... }:
{ config, pkgs, lib, ... }:
{
# TODO: AppArmor profiles
programs.firejail = {
enable = true;
wrappedBinaries = {
mpv = "${lib.getBin pkgs.mpv}/bin/mpv";
};
};
}

+ 39
- 74
component/bootloader.nix View File

@ -1,93 +1,58 @@
{ config, pkgs, lib, ... }:
with lib;
let
cfg = config.modules.navi.bootloader;
patched-grub-pl = pkgs.fetchurl {
url = "https://raw.githubusercontent.com/NixOS/nixpkgs/a7a0d79ef3fd0bf86847612597f4b62ce6ec5a18/nixos/modules/system/boot/loader/grub/install-grub.pl";
sha256 = "0846x78zb0nq0256kwjpivw2dwwv3xrxcyhq03a7xhl1lh648fx6";
postFetch = ''
sed -i 's/"NixOS/"navi/' $downloadedFile
'';
};
secrets_path = ./. + "/../secrets/bootloader/${config.networking.hostName}/pub.gpg";
in
let
# grub should be a coreboot payload when possible and patched: disable
# grub-rescue, only cryptomount the given drive in argument and navi names.
# we should then override install-grub to change nixos to navi and enable
# smooth transition to sway with plymouth
# /!\: IF YOU WANT TO DEBUG GRUB DISABLE THE RESCUE_RUN PATCH UNLESS YOU WANT
# TO HAVE AN UNBOOTABLE SYSTEM
grubPatch = ''
sed -i 's/"Welcome to GRUB/"Welcome to navi/' $(grep -Rl '"Welcome to GRUB')
sed -i 's/GNU GRUB version %s/navi bootloader/' $(grep -Rl 'GNU GRUB version %s')
sed -i 's/grub>/navi>/' $(grep -Rl 'grub>')
sed -i 's/GRUB menu\."/menu\."/' $(grep -Rl 'GRUB menu\."')
${optionalString cfg.no_mercy
"sed -i 's/grub_rescue_run ();/grub_exit ();/' $(grep -Rl 'grub_rescue_run();')"}
"sed -i 's/grub_rescue_run ();/grub_exit ();/' $(grep -Rl 'grub_rescue_run ();')"}
'';
secrets_path = ./. + "/../secrets/bootloader/${config.networking.hostName}/pub.gpg";
in
{
disabledModules = [ "system/boot/loader/grub/grub.nix" ];
imports = [ ./../overlays/grub/grub.nix ];
install-grub-pl = pkgs.substituteAll {
src = builtins.unsafeDiscardStringContext patched-grub-pl;
utillinux = pkgs.util-linux;
btrfsprogs = pkgs.btrfs-progs;
# since we are disregarding src context because we already have its purity
# verified by the sha256 of fetchurl it is not necessarily evaluated, we
# force it to evaluate as an argument of substitute so that the file
# actually exists when the substitute is ran
dummy = patched-grub-pl;
};
in
{
options.modules.navi.bootloader = {
enable = mkEnableOption "Enable navi's bootloader";
no_mercy = mkOption {
type = types.bool;
default = true;
description = ''
Disable bootloader rescue mode when sigchecks fail.
WARNING: This creates a security hole in your bootloader config, this
should only be enabled for debugging purposes.
'';
};
options.modules.navi.bootloader = {
enable = mkEnableOption "Enable navi's bootloader";
no_mercy = mkOption {
type = types.bool;
default = true;
description = ''
Disable bootloader rescue mode when sigchecks fail.
WARNING: This creates a security hole in your bootloader config, this
should only be enabled for debugging purposes.
'';
};
config = mkIf cfg.enable {
};
config = mkIf cfg.enable {
# required so we can write the .sig
boot.loader.grub.copyKernels = true;
boot.loader.grub.extraGrubInstallArgs = [
# XXX: auto-sign on grub-install
#"--pubkey=${pkgs.copyPathToStore secrets_path}"
"--modules=verifiers gcry_sha256 gcry_sha512 gcry_dsa gcry_rsa" ];
"--pubkey=${pkgs.copyPathToStore secrets_path}"
"--modules=verifiers gcry_sha256 gcry_sha512 gcry_dsa gcry_rsa" ];
boot.loader.grub.configurationName = "navi";
# we wait one second for esc keyboard mashing, otherwise we boot normally
boot.loader.grub.extraConfig = ''
set timeout=1
set timeout_style='hidden'
'';
# no need for another display change + half a second background image flicker
boot.loader.grub.splashImage = null;
# we wait one second for esc keyboard mashing, otherwise we boot normally
boot.loader.grub.extraConfig = ''
set timeout=1
set timeout_style='hidden'
'';
# no need for another display change + half a second background image flicker
boot.loader.grub.splashImage = null;
#nixpkgs.system.build.installBootLoader = "";
nixpkgs.overlays = [
(self: super: {
grub2 = super.grub2.overrideAttrs (oldAttrs: rec {
postPatch = grubPatch;
});
#system = super.system // {
#build = super.system.build // {
#installBootLoader = super.system.build.installBootLoader.overrideAttrs (oldAttrs: {
## this absolute monstrosity is written within builtins and basically
## splits a string before and after .*pl and puts it back together but
## with a custom perl script
## basically, in a pseudo language that makes sense:
## split = split_text(text, ".*/bin/perl")
## text = split[1][0] + " ${install-grub-pl} " + split[4]
#text = (builtins.elemAt (builtins.elemAt (builtins.split
#"(^.*/bin/perl)|( .*\\.pl) " oldAttrs.text) 1) 0) + " ${install-grub-pl} "
#+ builtins.elemAt (builtins.split "(^.*/bin/perl)|( .*\\.pl) "
#oldAttrs.text) 4;
#});
#};
#};
})];
};
}
nixpkgs.overlays = [
(self: super: {
grub2 = super.grub2.overrideAttrs (oldAttrs: rec {
postPatch = grubPatch;
});
})];
};
}

+ 0
- 2
machines/alastor/hardware.nix View File

@ -63,8 +63,6 @@
[ { device = "/dev/disk/by-uuid/b8be1d58-dd39-454a-9754-2f23df66cd38"; }
];
# Use the systemd-boot EFI boot loader.
boot.loader.systemd-boot.enable = true;
boot.loader.efi.canTouchEfiVariables = true;
# networking.hostName = "nixos"; # Define your hostname.

+ 9
- 0
overlays/grub/README.md View File

@ -0,0 +1,9 @@
This is based on commit
c14f14eeaf919c914e4dec2ce485a5bdc8dd4fec
of nixpkgs master.
PLEASE UPDATE ME TO BE ABLE TO EASILY DIFF OUT THE CHANGES WHEN YOU REBASE ME.

+ 836
- 0
overlays/grub/grub.nix View File

@ -0,0 +1,836 @@
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.boot.loader.grub;
efi = config.boot.loader.efi;
grubPkgs =
# Package set of targeted architecture
if cfg.forcei686 then pkgs.pkgsi686Linux else pkgs;
realGrub = if cfg.version == 1 then grubPkgs.grub
else if cfg.zfsSupport then grubPkgs.grub2.override { zfsSupport = true; }
else if cfg.trustedBoot.enable
then if cfg.trustedBoot.isHPLaptop
then grubPkgs.trustedGrub-for-HP
else grubPkgs.trustedGrub
else grubPkgs.grub2;
grub =
# Don't include GRUB if we're only generating a GRUB menu (e.g.,
# in EC2 instances).
if cfg.devices == ["nodev"]
then null
else realGrub;
grubEfi =
# EFI version of Grub v2
if cfg.efiSupport && (cfg.version == 2)
then realGrub.override { efiSupport = cfg.efiSupport; }
else null;
secrets_path = ./. + "/../../secrets/bootloader/${config.networking.hostName}/priv.gpg";
f = x: if x == null then "" else "" + x;
grubConfig = args:
let
efiSysMountPoint = if args.efiSysMountPoint == null then args.path else args.efiSysMountPoint;
efiSysMountPoint' = replaceChars [ "/" ] [ "-" ] efiSysMountPoint;
in
pkgs.writeText "grub-config.xml" (builtins.toXML
{ splashImage = f cfg.splashImage;
splashMode = f cfg.splashMode;
backgroundColor = f cfg.backgroundColor;
grub = f grub;
grubTarget = f (grub.grubTarget or "");
shell = "${pkgs.runtimeShell}";
fullName = lib.getName realGrub;
fullVersion = lib.getVersion realGrub;
grubEfi = f grubEfi;
grubTargetEfi = if cfg.efiSupport && (cfg.version == 2) then f (grubEfi.grubTarget or "") else "";
bootPath = args.path;
storePath = config.boot.loader.grub.storePath;
bootloaderId = if args.efiBootloaderId == null then "NixOS${efiSysMountPoint'}" else args.efiBootloaderId;
timeout = if config.boot.loader.timeout == null then -1 else config.boot.loader.timeout;
users = if cfg.users == {} || cfg.version != 1 then cfg.users else throw "GRUB version 1 does not support user accounts.";
theme = f cfg.theme;
inherit efiSysMountPoint;
inherit (args) devices;
inherit (efi) canTouchEfiVariables;
inherit (cfg)
version extraConfig extraPerEntryConfig extraEntries forceInstall useOSProber
extraGrubInstallArgs
extraEntriesBeforeNixOS extraPrepareConfig configurationLimit copyKernels
default fsIdentifier efiSupport efiInstallAsRemovable gfxmodeEfi gfxmodeBios gfxpayloadEfi gfxpayloadBios;
path = with pkgs; makeBinPath (
[ coreutils gnused gnugrep findutils diffutils btrfs-progs util-linux mdadm ]
++ optional (cfg.efiSupport && (cfg.version == 2)) efibootmgr
++ optionals cfg.useOSProber [ busybox os-prober ]);
font = if cfg.font == null then ""
else (if lib.last (lib.splitString "." cfg.font) == "pf2"
then cfg.font
else "${convertedFont}");
});
bootDeviceCounters = fold (device: attr: attr // { ${device} = (attr.${device} or 0) + 1; }) {}
(concatMap (args: args.devices) cfg.mirroredBoots);
convertedFont = (pkgs.runCommand "grub-font-converted.pf2" {}
(builtins.concatStringsSep " "
([ "${realGrub}/bin/grub-mkfont"
cfg.font
"--output" "$out"
] ++ (optional (cfg.fontSize!=null) "--size ${toString cfg.fontSize}")))
);
defaultSplash = pkgs.nixos-artwork.wallpapers.simple-dark-gray-bootloader.gnomeFilePath;
in
{
###### interface
options = {
boot.loader.grub = {
enable = mkOption {
default = !config.boot.isContainer;
type = types.bool;
description = ''
Whether to enable the GNU GRUB boot loader.
'';
};
version = mkOption {
default = 2;
example = 1;
type = types.int;
description = ''
The version of GRUB to use: <literal>1</literal> for GRUB
Legacy (versions 0.9x), or <literal>2</literal> (the
default) for GRUB 2.
'';
};
device = mkOption {
default = "";
example = "/dev/disk/by-id/wwn-0x500001234567890a";
type = types.str;
description = ''
The device on which the GRUB boot loader will be installed.
The special value <literal>nodev</literal> means that a GRUB
boot menu will be generated, but GRUB itself will not
actually be installed. To install GRUB on multiple devices,
use <literal>boot.loader.grub.devices</literal>.
'';
};
devices = mkOption {
default = [];
example = [ "/dev/disk/by-id/wwn-0x500001234567890a" ];
type = types.listOf types.str;
description = ''
The devices on which the boot loader, GRUB, will be
installed. Can be used instead of <literal>device</literal> to
install GRUB onto multiple devices.
'';
};
users = mkOption {
default = {};
example = {
root = { hashedPasswordFile = "/path/to/file"; };
};
description = ''
User accounts for GRUB. When specified, the GRUB command line and
all boot options except the default are password-protected.
All passwords and hashes provided will be stored in /boot/grub/grub.cfg,
and will be visible to any local user who can read this file. Additionally,
any passwords and hashes provided directly in a Nix configuration
(as opposed to external files) will be copied into the Nix store, and
will be visible to all local users.
'';
type = with types; attrsOf (submodule {
options = {
hashedPasswordFile = mkOption {
example = "/path/to/file";
default = null;
type = with types; uniq (nullOr str);
description = ''
Specifies the path to a file containing the password hash
for the account, generated with grub-mkpasswd-pbkdf2.
This hash will be stored in /boot/grub/grub.cfg, and will
be visible to any local user who can read this file.
'';
};
hashedPassword = mkOption {
example = "grub.pbkdf2.sha512.10000.674DFFDEF76E13EA...2CC972B102CF4355";
default = null;
type = with types; uniq (nullOr str);
description = ''
Specifies the password hash for the account,
generated with grub-mkpasswd-pbkdf2.
This hash will be copied to the Nix store, and will be visible to all local users.
'';
};
passwordFile = mkOption {
example = "/path/to/file";
default = null;
type = with types; uniq (nullOr str);
description = ''
Specifies the path to a file containing the
clear text password for the account.
This password will be stored in /boot/grub/grub.cfg, and will
be visible to any local user who can read this file.
'';
};
password = mkOption {
example = "Pa$$w0rd!";
default = null;
type = with types; uniq (nullOr str);
description = ''
Specifies the clear text password for the account.
This password will be copied to the Nix store, and will be visible to all local users.
'';
};
};
});
};
mirroredBoots = mkOption {
default = [ ];
example = [
{ path = "/boot1"; devices = [ "/dev/disk/by-id/wwn-0x500001234567890a" ]; }
{ path = "/boot2"; devices = [ "/dev/disk/by-id/wwn-0x500009876543210a" ]; }
];
description = ''
Mirror the boot configuration to multiple partitions and install grub
to the respective devices corresponding to those partitions.
'';
type = with types; listOf (submodule {
options = {
path = mkOption {
example = "/boot1";
type = types.str;
description = ''
The path to the boot directory where GRUB will be written. Generally
this boot path should double as an EFI path.
'';
};
efiSysMountPoint = mkOption {
default = null;
example = "/boot1/efi";
type = types.nullOr types.str;
description = ''
The path to the efi system mount point. Usually this is the same
partition as the above path and can be left as null.
'';
};
efiBootloaderId = mkOption {
default = null;
example = "NixOS-fsid";
type = types.nullOr types.str;
description = ''
The id of the bootloader to store in efi nvram.
The default is to name it NixOS and append the path or efiSysMountPoint.
This is only used if <literal>boot.loader.efi.canTouchEfiVariables</literal> is true.
'';
};
devices = mkOption {
default = [ ];
example = [ "/dev/disk/by-id/wwn-0x500001234567890a" "/dev/disk/by-id/wwn-0x500009876543210a" ];
type = types.listOf types.str;
description = ''
The path to the devices which will have the GRUB MBR written.
Note these are typically device paths and not paths to partitions.
'';
};
};
});
};
configurationName = mkOption {
default = "";
example = "Stable 2.6.21";
type = types.str;
description = ''
GRUB entry name instead of default.
'';
};
storePath = mkOption {
default = "/nix/store";
type = types.str;
description = ''
Path to the Nix store when looking for kernels at boot.
Only makes sense when copyKernels is false.
'';
};
extraPrepareConfig = mkOption {
default = "";
type = types.lines;
description = ''
Additional bash commands to be run at the script that
prepares the GRUB menu entries.
'';
};
extraConfig = mkOption {
default = "";
example = ''
serial --unit=0 --speed=115200 --word=8 --parity=no --stop=1
terminal_input --append serial
terminal_output --append serial
'';
type = types.lines;
description = ''
Additional GRUB commands inserted in the configuration file
just before the menu entries.
'';
};
extraGrubInstallArgs = mkOption {
default = [ ];
example = [ "--modules=nativedisk ahci pata part_gpt part_msdos diskfilter mdraid1x lvm ext2" ];
type = types.listOf types.str;
description = ''
Additional arguments passed to <literal>grub-install</literal>.
A use case for this is to build specific GRUB2 modules
directly into the GRUB2 kernel image, so that they are available
and activated even in the <literal>grub rescue</literal> shell.
They are also necessary when the BIOS/UEFI is bugged and cannot
correctly read large disks (e.g. above 2 TB), so GRUB2's own
<literal>nativedisk</literal> and related modules can be used
to use its own disk drivers. The example shows one such case.
This is also useful for booting from USB.
See the
<link xlink:href="http://git.savannah.gnu.org/cgit/grub.git/tree/grub-core/commands/nativedisk.c?h=grub-2.04#n326">
GRUB source code
</link>
for which disk modules are available.
The list elements are passed directly as <literal>argv</literal>
arguments to the <literal>grub-install</literal> program, in order.
'';
};
extraPerEntryConfig = mkOption {
default = "";
example = "root (hd0)";
type = types.lines;
description = ''
Additional GRUB commands inserted in the configuration file
at the start of each NixOS menu entry.
'';
};
extraEntries = mkOption {
default = "";
type = types.lines;
example = ''
# GRUB 1 example (not GRUB 2 compatible)
title Windows
chainloader (hd0,1)+1
# GRUB 2 example
menuentry "Windows 7" {
chainloader (hd0,4)+1
}
# GRUB 2 with UEFI example, chainloading another distro
menuentry "Fedora" {
set root=(hd1,1)
chainloader /efi/fedora/grubx64.efi
}
'';
description = ''
Any additional entries you want added to the GRUB boot menu.
'';
};
extraEntriesBeforeNixOS = mkOption {
default = false;
type = types.bool;
description = ''
Whether extraEntries are included before the default option.
'';
};
extraFiles = mkOption {
type = types.attrsOf types.path;
default = {};
example = literalExample ''
{ "memtest.bin" = "''${pkgs.memtest86plus}/memtest.bin"; }
'';
description = ''
A set of files to be copied to <filename>/boot</filename>.
Each attribute name denotes the destination file name in
<filename>/boot</filename>, while the corresponding
attribute value specifies the source file.
'';
};
useOSProber = mkOption {
default = false;
type = types.bool;
description = ''
If set to true, append entries for other OSs detected by os-prober.
'';
};
splashImage = mkOption {
type = types.nullOr types.path;
example = literalExample "./my-background.png";
description = ''
Background image used for GRUB.
Set to <literal>null</literal> to run GRUB in text mode.
<note><para>
For grub 1:
It must be a 640x480,
14-colour image in XPM format, optionally compressed with
<command>gzip</command> or <command>bzip2</command>.
</para></note>
<note><para>
For grub 2:
File must be one of .png, .tga, .jpg, or .jpeg. JPEG images must
not be progressive.
The image will be scaled if necessary to fit the screen.
</para></note>
'';
};
backgroundColor = mkOption {
type = types.nullOr types.str;
example = "#7EBAE4";
default = null;
description = ''
Background color to be used for GRUB to fill the areas the image isn't filling.
<note><para>
This options has no effect for GRUB 1.
</para></note>
'';
};
theme = mkOption {
type = types.nullOr types.path;
example = literalExample "pkgs.nixos-grub2-theme";
default = null;
description = ''
Grub theme to be used.
<note><para>
This options has no effect for GRUB 1.
</para></note>
'';
};
splashMode = mkOption {
type = types.enum [ "normal" "stretch" ];
default = "stretch";
description = ''
Whether to stretch the image or show the image in the top-left corner unstretched.
<note><para>
This options has no effect for GRUB 1.
</para></note>
'';
};
font = mkOption {
type = types.nullOr types.path;
default = "${realGrub}/share/grub/unicode.pf2";
defaultText = ''"''${pkgs.grub2}/share/grub/unicode.pf2"'';
description = ''
Path to a TrueType, OpenType, or pf2 font to be used by Grub.
'';
};
fontSize = mkOption {
type = types.nullOr types.int;
example = literalExample 16;
default = null;
description = ''
Font size for the grub menu. Ignored unless <literal>font</literal>
is set to a ttf or otf font.
'';
};
gfxmodeEfi = mkOption {
default = "auto";
example = "1024x768";
type = types.str;
description = ''
The gfxmode to pass to GRUB when loading a graphical boot interface under EFI.
'';
};
gfxmodeBios = mkOption {
default = "1024x768";
example = "auto";
type = types.str;
description = ''
The gfxmode to pass to GRUB when loading a graphical boot interface under BIOS.
'';
};
gfxpayloadEfi = mkOption {
default = "keep";
example = "text";
type = types.str;
description = ''
The gfxpayload to pass to GRUB when loading a graphical boot interface under EFI.
'';
};
gfxpayloadBios = mkOption {
default = "text";
example = "keep";
type = types.str;
description = ''
The gfxpayload to pass to GRUB when loading a graphical boot interface under BIOS.
'';
};
configurationLimit = mkOption {
default = 100;
example = 120;
type = types.int;
description = ''
Maximum of configurations in boot menu. GRUB has problems when
there are too many entries.
'';
};
copyKernels = mkOption {
default = false;
type = types.bool;
description = ''
Whether the GRUB menu builder should copy kernels and initial
ramdisks to /boot. This is done automatically if /boot is
on a different partition than /.
'';
};
default = mkOption {
default = "0";
type = types.either types.int types.str;
apply = toString;
description = ''
Index of the default menu item to be booted.
'';
};
fsIdentifier = mkOption {
default = "uuid";
type = types.enum [ "uuid" "label" "provided" ];
description = ''
Determines how GRUB will identify devices when generating the
configuration file. A value of uuid / label signifies that grub
will always resolve the uuid or label of the device before using
it in the configuration. A value of provided means that GRUB will
use the device name as show in <command>df</command> or
<command>mount</command>. Note, zfs zpools / datasets are ignored
and will always be mounted using their labels.
'';
};
zfsSupport = mkOption {
default = false;
type = types.bool;
description = ''
Whether GRUB should be built against libzfs.
ZFS support is only available for GRUB v2.
This option is ignored for GRUB v1.
'';
};
efiSupport = mkOption {
default = false;
type = types.bool;
description = ''
Whether GRUB should be built with EFI support.
EFI support is only available for GRUB v2.
This option is ignored for GRUB v1.
'';
};
efiInstallAsRemovable = mkOption {
default = false;
type = types.bool;
description = ''
Whether to invoke <literal>grub-install</literal> with
<literal>--removable</literal>.</para>
<para>Unless you turn this on, GRUB will install itself somewhere in
<literal>boot.loader.efi.efiSysMountPoint</literal> (exactly where
depends on other config variables). If you've set
<literal>boot.loader.efi.canTouchEfiVariables</literal> *AND* you
are currently booted in UEFI mode, then GRUB will use
<literal>efibootmgr</literal> to modify the boot order in the
EFI variables of your firmware to include this location. If you are
*not* booted in UEFI mode at the time GRUB is being installed, the
NVRAM will not be modified, and your system will not find GRUB at
boot time. However, GRUB will still return success so you may miss
the warning that gets printed ("<literal>efibootmgr: EFI variables
are not supported on this system.</literal>").</para>
<para>If you turn this feature on, GRUB will install itself in a
special location within <literal>efiSysMountPoint</literal> (namely
<literal>EFI/boot/boot$arch.efi</literal>) which the firmwares
are hardcoded to try first, regardless of NVRAM EFI variables.</para>
<para>To summarize, turn this on if:
<itemizedlist>
<listitem><para>You are installing NixOS and want it to boot in UEFI mode,
but you are currently booted in legacy mode</para></listitem>
<listitem><para>You want to make a drive that will boot regardless of
the NVRAM state of the computer (like a USB "removable" drive)</para></listitem>
<listitem><para>You simply dislike the idea of depending on NVRAM
state to make your drive bootable</para></listitem>
</itemizedlist>
'';
};
enableCryptodisk = mkOption {
default = false;
type = types.bool;
description = ''
Enable support for encrypted partitions. GRUB should automatically
unlock the correct encrypted partition and look for filesystems.
'';
};
forceInstall = mkOption {
default = false;
type = types.bool;
description = ''
Whether to try and forcibly install GRUB even if problems are
detected. It is not recommended to enable this unless you know what
you are doing.
'';
};
forcei686 = mkOption {
default = false;
type = types.bool;
description = ''
Whether to force the use of a ia32 boot loader on x64 systems. Required
to install and run NixOS on 64bit x86 systems with 32bit (U)EFI.
'';
};
trustedBoot = {
enable = mkOption {
default = false;
type = types.bool;
description = ''
Enable trusted boot. GRUB will measure all critical components during
the boot process to offer TCG (TPM) support.
'';
};
systemHasTPM = mkOption {
default = "";
example = "YES_TPM_is_activated";
type = types.str;
description = ''
Assertion that the target system has an activated TPM. It is a safety
check before allowing the activation of 'trustedBoot.enable'. TrustedBoot
WILL FAIL TO BOOT YOUR SYSTEM if no TPM is available.
'';
};
isHPLaptop = mkOption {
default = false;
type = types.bool;
description = ''
Use a special version of TrustedGRUB that is needed by some HP laptops
and works only for the HP laptops.
'';
};
};
};
};
###### implementation
config = mkMerge [
{ boot.loader.grub.splashImage = mkDefault (
if cfg.version == 1 then pkgs.fetchurl {
url = "http://www.gnome-look.org/CONTENT/content-files/36909-soft-tux.xpm.gz";
sha256 = "14kqdx2lfqvh40h6fjjzqgff1mwk74dmbjvmqphi6azzra7z8d59";
}
# GRUB 1.97 doesn't support gzipped XPMs.
else defaultSplash);
}
(mkIf (cfg.splashImage == defaultSplash) {
boot.loader.grub.backgroundColor = mkDefault "#2F302F";
boot.loader.grub.splashMode = mkDefault "normal";
})
(mkIf cfg.enable {
boot.loader.grub.devices = optional (cfg.device != "") cfg.device;
boot.loader.grub.mirroredBoots = optionals (cfg.devices != [ ]) [
{ path = "/boot"; inherit (cfg) devices; inherit (efi) efiSysMountPoint; }
];
boot.loader.supportsInitrdSecrets = true;
system.build.installBootLoader =
let
install-grub-pl = pkgs.substituteAll {
src = ./install-grub.pl;
utillinux = pkgs.util-linux;
btrfsprogs = pkgs.btrfs-progs;
};
in pkgs.writeScript "install-grub.sh" (''
#!${pkgs.runtimeShell}
set -e
export PERL5LIB=${with pkgs.perlPackages; makePerlPath [ FileSlurp FileCopyRecursive XMLLibXML XMLSAX XMLSAXBase ListCompare JSON ]}
${optionalString cfg.enableCryptodisk "export GRUB_ENABLE_CRYPTODISK=y"}
'' + flip concatMapStrings cfg.mirroredBoots (args: ''
${pkgs.perl}/bin/perl ${install-grub-pl} ${grubConfig args} $@
'') +
''
${pkgs.findutils}/bin/find /boot -not -path "/boot/efi/*" -type f -name '*.sig' -delete
mkdir gpgtmp
old_gpg_home=$GNUPGHOME
export GNUPGHOME="$(pwd)/gpgtmp"
${pkgs.gnupg}/bin/gpg --import ${pkgs.copyPathToStore secrets_path} > /dev/null 2>&1
${pkgs.findutils}/bin/find /boot -not -path "/boot/efi/*" -type f -exec ${pkgs.gnupg}/bin/gpg --detach-sign "{}" \; > /dev/null 2>&1
rm -rf $GNUPGHOME
export GNUPGHOME=$old_gpg_home
'');
system.build.grub = grub;
# Common attribute for boot loaders so only one of them can be
# set at once.
system.boot.loader.id = "grub";
environment.systemPackages = optional (grub != null) grub;
boot.loader.grub.extraPrepareConfig =
concatStrings (mapAttrsToList (n: v: ''
${pkgs.coreutils}/bin/cp -pf "${v}" "@bootPath@/${n}"
'') config.boot.loader.grub.extraFiles);
assertions = [
{
assertion = !cfg.zfsSupport || cfg.version == 2;
message = "Only GRUB version 2 provides ZFS support";
}
{
assertion = cfg.mirroredBoots != [ ];
message = "You must set the option boot.loader.grub.devices or "
+ "'boot.loader.grub.mirroredBoots' to make the system bootable.";
}
{
assertion = cfg.efiSupport || all (c: c < 2) (mapAttrsToList (n: c: if n == "nodev" then 0 else c) bootDeviceCounters);
message = "You cannot have duplicated devices in mirroredBoots";
}
{
assertion = !cfg.trustedBoot.enable || cfg.version == 2;
message = "Trusted GRUB is only available for GRUB 2";
}
{
assertion = !cfg.efiSupport || !cfg.trustedBoot.enable;
message = "Trusted GRUB does not have EFI support";
}
{
assertion = !cfg.zfsSupport || !cfg.trustedBoot.enable;
message = "Trusted GRUB does not have ZFS support";
}
{
assertion = !cfg.trustedBoot.enable || cfg.trustedBoot.systemHasTPM == "YES_TPM_is_activated";
message = "Trusted GRUB can break the system! Confirm that the system has an activated TPM by setting 'systemHasTPM'.";
}
{
assertion = cfg.efiInstallAsRemovable -> cfg.efiSupport;
message = "If you wish to to use boot.loader.grub.efiInstallAsRemovable, then turn on boot.loader.grub.efiSupport";
}
{
assertion = cfg.efiInstallAsRemovable -> !config.boot.loader.efi.canTouchEfiVariables;
message = "If you wish to to use boot.loader.grub.efiInstallAsRemovable, then turn off boot.loader.efi.canTouchEfiVariables";
}
] ++ flip concatMap cfg.mirroredBoots (args: [
{
assertion = args.devices != [ ];
message = "A boot path cannot have an empty devices string in ${args.path}";
}
{
assertion = hasPrefix "/" args.path;
message = "Boot paths must be absolute, not ${args.path}";
}
{
assertion = if args.efiSysMountPoint == null then true else hasPrefix "/" args.efiSysMountPoint;
message = "EFI paths must be absolute, not ${args.efiSysMountPoint}";
}
] ++ forEach args.devices (device: {
assertion = device == "nodev" || hasPrefix "/" device;
message = "GRUB devices must be absolute paths, not ${device} in ${args.path}";
}));
})
];
imports =
[ (mkRemovedOptionModule [ "boot" "loader" "grub" "bootDevice" ] "")
(mkRenamedOptionModule [ "boot" "copyKernels" ] [ "boot" "loader" "grub" "copyKernels" ])
(mkRenamedOptionModule [ "boot" "extraGrubEntries" ] [ "boot" "loader" "grub" "extraEntries" ])
(mkRenamedOptionModule [ "boot" "extraGrubEntriesBeforeNixos" ] [ "boot" "loader" "grub" "extraEntriesBeforeNixOS" ])
(mkRenamedOptionModule [ "boot" "grubDevice" ] [ "boot" "loader" "grub" "device" ])
(mkRenamedOptionModule [ "boot" "bootMount" ] [ "boot" "loader" "grub" "bootDevice" ])
(mkRenamedOptionModule [ "boot" "grubSplashImage" ] [ "boot" "loader" "grub" "splashImage" ])
(mkRemovedOptionModule [ "boot" "loader" "grub" "extraInitrd" ] ''
This option has been replaced with the bootloader agnostic
boot.initrd.secrets option. To migrate to the initrd secrets system,
extract the extraInitrd archive into your main filesystem:
# zcat /boot/extra_initramfs.gz | cpio -idvmD /etc/secrets/initrd
/path/to/secret1
/path/to/secret2
then replace boot.loader.grub.extraInitrd with boot.initrd.secrets:
boot.initrd.secrets = {
"/path/to/secret1" = "/etc/secrets/initrd/path/to/secret1";
"/path/to/secret2" = "/etc/secrets/initrd/path/to/secret2";
};
See the boot.initrd.secrets option documentation for more information.
'')
];
}

+ 754
- 0
overlays/grub/install-grub.pl View File

@ -0,0 +1,754 @@
use strict;
use warnings;
use Class::Struct;
use XML::LibXML;
use File::Basename;
use File::Path;
use File::stat;
use File::Copy;
use File::Copy::Recursive qw(rcopy pathrm);
use File::Slurp;
use File::Temp;
use JSON;
use File::Find;
require List::Compare;
use POSIX;
use Cwd;
# system.build.toplevel path
my $defaultConfig = $ARGV[1] or die;
# Grub config XML generated by grubConfig function in grub.nix
my $dom = XML::LibXML->load_xml(location => $ARGV[0]);
sub get { my ($name) = @_; return $dom->findvalue("/expr/attrs/attr[\@name = '$name']/*/\@value"); }
sub getList {
my ($name) = @_;
my @list = ();
foreach my $entry ($dom->findnodes("/expr/attrs/attr[\@name = '$name']/list/string/\@value")) {
$entry = $entry->findvalue(".") or die;
push(@list, $entry);
}
return @list;
}
sub readFile {
my ($fn) = @_; local $/ = undef;
open FILE, "<$fn" or return undef; my $s = <FILE>; close FILE;
local $/ = "\n"; chomp $s; return $s;
}
sub writeFile {
my ($fn, $s) = @_;
open FILE, ">$fn" or die "cannot create $fn: $!\n";
print FILE $s or die;
close FILE or die;
}
sub runCommand {
my ($cmd) = @_;
open FILE, "$cmd 2>/dev/null |" or die "Failed to execute: $cmd\n";
my @ret = <FILE>;
close FILE;
return ($?, @ret);
}
my $grub = get("grub");
my $grubVersion = int(get("version"));
my $grubTarget = get("grubTarget");
my $extraConfig = get("extraConfig");
my $extraPrepareConfig = get("extraPrepareConfig");
my $extraPerEntryConfig = get("extraPerEntryConfig");
my $extraEntries = get("extraEntries");
my $extraEntriesBeforeNixOS = get("extraEntriesBeforeNixOS") eq "true";
my $splashImage = get("splashImage");
my $splashMode = get("splashMode");
my $backgroundColor = get("backgroundColor");
my $configurationLimit = int(get("configurationLimit"));
my $copyKernels = get("copyKernels") eq "true";
my $timeout = int(get("timeout"));
my $defaultEntry = get("default");
my $fsIdentifier = get("fsIdentifier");
my $grubEfi = get("grubEfi");
my $grubTargetEfi = get("grubTargetEfi");
my $bootPath = get("bootPath");
my $storePath = get("storePath");
my $canTouchEfiVariables = get("canTouchEfiVariables");
my $efiInstallAsRemovable = get("efiInstallAsRemovable");
my $efiSysMountPoint = get("efiSysMountPoint");
my $gfxmodeEfi = get("gfxmodeEfi");
my $gfxmodeBios = get("gfxmodeBios");
my $gfxpayloadEfi = get("gfxpayloadEfi");
my $gfxpayloadBios = get("gfxpayloadBios");
my $bootloaderId = get("bootloaderId");
my $forceInstall = get("forceInstall");
my $font = get("font");
my $theme = get("theme");
$ENV{'PATH'} = get("path");
die "unsupported GRUB version\n" if $grubVersion != 1 && $grubVersion != 2;
print STDERR "updating GRUB $grubVersion menu...\n";
mkpath("$bootPath/grub", 0, 0700);
# Discover whether the bootPath is on the same filesystem as / and
# /nix/store. If not, then all kernels and initrds must be copied to
# the bootPath.
if (stat($bootPath)->dev != stat("/nix/store")->dev) {
$copyKernels = 1;
}
# Discover information about the location of the bootPath
struct(Fs => {
device => '$',
type => '$',
mount => '$',
});
sub PathInMount {
my ($path, $mount) = @_;
my @splitMount = split /\//, $mount;
my @splitPath = split /\//, $path;
if ($#splitPath < $#splitMount) {
return 0;
}
for (my $i = 0; $i <= $#splitMount; $i++) {
if ($splitMount[$i] ne $splitPath[$i]) {
return 0;
}
}
return 1;
}
# Figure out what filesystem is used for the directory with init/initrd/kernel files
sub GetFs {
my ($dir) = @_;
my $bestFs = Fs->new(device => "", type => "", mount => "");
foreach my $fs (read_file("/proc/self/mountinfo")) {
chomp $fs;
my @fields = split / /, $fs;
my $mountPoint = $fields[4];
next unless -d $mountPoint;
my @mountOptions = split /,/, $fields[5];
# Skip the optional fields.
my $n = 6; $n++ while $fields[$n] ne "-"; $n++;
my $fsType = $fields[$n];
my $device = $fields[$n + 1];
my @superOptions = split /,/, $fields[$n + 2];
# Skip the bind-mount on /nix/store.
next if $mountPoint eq "/nix/store" && (grep { $_ eq "rw" } @superOptions);
# Skip mount point generated by systemd-efi-boot-generator?
next if $fsType eq "autofs";
# Ensure this matches the intended directory
next unless PathInMount($dir, $mountPoint);
# Is it better than our current match?
if (length($mountPoint) > length($bestFs->mount)) {
$bestFs = Fs->new(device => $device, type => $fsType, mount => $mountPoint);
}
}
return $bestFs;
}
struct (Grub => {
path => '$',
search => '$',
});
my $driveid = 1;
sub GrubFs {
my ($dir) = @_;
my $fs = GetFs($dir);
my $path = substr($dir, length($fs->mount));
if (substr($path, 0, 1) ne "/") {
$path = "/$path";
}
my $search = "";
if ($grubVersion > 1) {
# ZFS is completely separate logic as zpools are always identified by a label
# or custom UUID
if ($fs->type eq 'zfs') {
my $sid = index($fs->device, '/');
if ($sid < 0) {
$search = '--label ' . $fs->device;
$path = '/@' . $path;
} else {
$search = '--label ' . substr($fs->device, 0, $sid);
$path = '/' . substr($fs->device, $sid) . '/@' . $path;
}
} else {
my %types = ('uuid' => '--fs-uuid', 'label' => '--label');
if ($fsIdentifier eq 'provided') {
# If the provided dev is identifying the partition using a label or uuid,
# we should get the label / uuid and do a proper search
my @matches = $fs->device =~ m/\/dev\/disk\/by-(label|uuid)\/(.*)/;
if ($#matches > 1) {
die "Too many matched devices"
} elsif ($#matches == 1) {
$search = "$types{$matches[0]} $matches[1]"
}
} else {
# Determine the identifying type
$search = $types{$fsIdentifier} . ' ';
# Based on the type pull in the identifier from the system
my ($status, @devInfo) = runCommand("@utillinux@/bin/blkid -o export @{[$fs->device]}");
if ($status != 0) {
die "Failed to get blkid info (returned $status) for @{[$fs->mount]} on @{[$fs->device]}";
}
my @matches = join("", @devInfo) =~ m/@{[uc $fsIdentifier]}=([^\n]*)/;
if ($#matches != 0) {
die "Couldn't find a $types{$fsIdentifier} for @{[$fs->device]}\n"
}
$search .= $matches[0];
}
# BTRFS is a special case in that we need to fix the referrenced path based on subvolumes
if ($fs->type eq 'btrfs') {
my ($status, @id_info) = runCommand("@btrfsprogs@/bin/btrfs subvol show @{[$fs->mount]}");
if ($status != 0) {
die "Failed to retrieve subvolume info for @{[$fs->mount]}\n";
}
my @ids = join("\n", @id_info) =~ m/^(?!\/\n).*Subvolume ID:[ \t\n]*([0-9]+)/s;
if ($#ids > 0) {
die "Btrfs subvol name for @{[$fs->device]} listed multiple times in mount\n"
} elsif ($#ids == 0) {
my ($status, @path_info) = runCommand("@btrfsprogs@/bin/btrfs subvol list @{[$fs->mount]}");
if ($status != 0) {
die "Failed to find @{[$fs->mount]} subvolume id from btrfs\n";
}
my @paths = join("", @path_info) =~ m/ID $ids[0] [^\n]* path ([^\n]*)/;
if ($#paths > 0) {
die "Btrfs returned multiple paths for a single subvolume id, mountpoint @{[$fs->mount]}\n";
} elsif ($#paths != 0) {
die "Btrfs did not return a path for the subvolume at @{[$fs->mount]}\n";
}
$path = "/$paths[0]$path";
}
}
}
if (not $search eq "") {
$search = "search --set=drive$driveid " . $search;
$path = "(\$drive$driveid)$path";
$driveid += 1;
}
}
return Grub->new(path => $path, search => $search);
}
my $grubBoot = GrubFs($bootPath);
my $grubStore;
if ($copyKernels == 0) {
$grubStore = GrubFs($storePath);
}
# Generate the header.
my $conf .= "# Automatically generated. DO NOT EDIT THIS FILE!\n";
if ($grubVersion == 1) {
$conf .= "
default $defaultEntry
timeout $timeout
";
if ($splashImage) {
copy $splashImage, "$bootPath/background.xpm.gz" or die "cannot copy $splashImage to $bootPath: $!\n";
$conf .= "splashimage " . ($grubBoot->path eq "/" ? "" : $grubBoot->path) . "/background.xpm.gz\n";
}
}
else {
my @users = ();
foreach my $user ($dom->findnodes('/expr/attrs/attr[@name = "users"]/attrs/attr')) {
my $name = $user->findvalue('@name') or die;
my $hashedPassword = $user->findvalue('./attrs/attr[@name = "hashedPassword"]/string/@value');
my $hashedPasswordFile = $user->findvalue('./attrs/attr[@name = "hashedPasswordFile"]/string/@value');
my $password = $user->findvalue('./attrs/attr[@name = "password"]/string/@value');
my $passwordFile = $user->findvalue('./attrs/attr[@name = "passwordFile"]/string/@value');
if ($hashedPasswordFile) {
open(my $f, '<', $hashedPasswordFile) or die "Can't read file '$hashedPasswordFile'!";
$hashedPassword = <$f>;
chomp $hashedPassword;
}
if ($passwordFile) {
open(my $f, '<', $passwordFile) or die "Can't read file '$passwordFile'!";
$password = <$f>;
chomp $password;
}
if ($hashedPassword) {
if (index($hashedPassword, "grub.pbkdf2.") == 0) {
$conf .= "\npassword_pbkdf2 $name $hashedPassword";
}
else {
die "Password hash for GRUB user '$name' is not valid!";
}
}
elsif ($password) {
$conf .= "\npassword $name $password";
}
else {
die "GRUB user '$name' has no password!";
}
push(@users, $name);
}
if (@users) {
$conf .= "\nset superusers=\"" . join(' ',@users) . "\"\n";
}
if ($copyKernels == 0) {
$conf .= "
" . $grubStore->search;
}
# FIXME: should use grub-mkconfig.
$conf .= "
" . $grubBoot->search . "
if [ -s \$prefix/grubenv ]; then
load_env
fi
# ‘grub-reboot’ sets a one-time saved entry, which we process here and
# then delete.
if [ \"\${next_entry}\" ]; then
set default=\"\${next_entry}\"
set next_entry=
save_env next_entry
set timeout=1
else
set default=$defaultEntry
set timeout=$timeout
fi
# Setup the graphics stack for bios and efi systems
if [ \"\${grub_platform}\" = \"efi\" ]; then
insmod efi_gop
insmod efi_uga
else
insmod vbe
fi
";
if ($font) {
copy $font, "$bootPath/converted-font.pf2" or die "cannot copy $font to $bootPath: $!\n";
$conf .= "
insmod font
if loadfont " . ($grubBoot->path eq "/" ? "" : $grubBoot->path) . "/converted-font.pf2; then
insmod gfxterm
if [ \"\${grub_platform}\" = \"efi\" ]; then
set gfxmode=$gfxmodeEfi
set gfxpayload=$gfxpayloadEfi
else
set gfxmode=$gfxmodeBios
set gfxpayload=$gfxpayloadBios
fi
terminal_output gfxterm
fi
";
}
if ($splashImage) {
# Keeps the image's extension.
my ($filename, $dirs, $suffix) = fileparse($splashImage, qr"\..[^.]*$");
# The module for jpg is jpeg.
if ($suffix eq ".jpg") {
$suffix = ".jpeg";
}
if ($backgroundColor) {
$conf .= "
background_color '$backgroundColor'
";
}
copy $splashImage, "$bootPath/background$suffix" or die "cannot copy $splashImage to $bootPath: $!\n";
$conf .= "
insmod " . substr($suffix, 1) . "
if background_image --mode '$splashMode' " . ($grubBoot->path eq "/" ? "" : $grubBoot->path) . "/background$suffix; then
set color_normal=white/black
set color_highlight=black/white
else
set menu_color_normal=cyan/blue
set menu_color_highlight=white/blue
fi
";
}
rmtree("$bootPath/theme") or die "cannot clean up theme folder in $bootPath\n" if -e "$bootPath/theme";
if ($theme) {
# Copy theme
rcopy($theme, "$bootPath/theme") or die "cannot copy $theme to $bootPath\n";
$conf .= "
# Sets theme.
set theme=" . ($grubBoot->path eq "/" ? "" : $grubBoot->path) . "/theme/theme.txt
export theme
# Load theme fonts, if any
";
find( { wanted => sub {
if ($_ =~ /\.pf2$/i) {
$font = File::Spec->abs2rel($File::Find::name, $theme);
$conf .= "
loadfont " . ($grubBoot->path eq "/" ? "" : $grubBoot->path) . "/theme/$font
";
}
}, no_chdir => 1 }, $theme );
}
}
$conf .= "$extraConfig\n";
# Generate the menu entries.
$conf .= "\n";
my %copied;
mkpath("$bootPath/kernels", 0, 0755) if $copyKernels;
sub copyToKernelsDir {
my ($path) = @_;
return $grubStore->path . substr($path, length("/nix/store")) unless $copyKernels;
$path =~ /\/nix\/store\/(.*)/ or die;
my $name = $1; $name =~ s/\//-/g;
my $dst = "$bootPath/kernels/$name";
# Don't copy the file if $dst already exists. This means that we
# have to create $dst atomically to prevent partially copied
# kernels or initrd if this script is ever interrupted.
if (! -e $dst) {
my $tmp = "$dst.tmp";
copy $path, $tmp or die "cannot copy $path to $tmp: $!\n";
rename $tmp, $dst or die "cannot rename $tmp to $dst: $!\n";
}
$copied{$dst} = 1;
return ($grubBoot->path eq "/" ? "" : $grubBoot->path) . "/kernels/$name";
}
sub addEntry {
my ($name, $path, $options) = @_;
return unless -e "$path/kernel" && -e "$path/initrd";
my $kernel = copyToKernelsDir(Cwd::abs_path("$path/kernel"));
my $initrd = copyToKernelsDir(Cwd::abs_path("$path/initrd"));
# Include second initrd with secrets
if (-e -x "$path/append-initrd-secrets") {
my $initrdName = basename($initrd);
my $initrdSecretsPath = "$bootPath/kernels/$initrdName-secrets";