39 lines
1.3 KiB
Nix
39 lines
1.3 KiB
Nix
{pkgs, ...}: let
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usb_data = import ../data/usb_data.nix {};
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enc_usb_mount = pkgs.writeShellScriptBin "enc_usb_mount" ''
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set -x
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${enc_usb_unmount}/bin/enc_usb_unmount
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cat /secrets/usb_encryption_passphrase | cryptsetup luksOpen ${usb_data.encrypted_path} ${usb_data.mapper_name}_afterboot -
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mount ${usb_data.mapper_path}_afterboot -o rw ${usb_data.mountpoint}
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'';
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enc_usb_unmount = pkgs.writeShellScriptBin "enc_usb_unmount" ''
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set -x
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umount -flR ${usb_data.mountpoint} || true
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cryptsetup close ${usb_data.mapper_name}_afterboot || true
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'';
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in {
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environment.systemPackages = [enc_usb_mount enc_usb_unmount];
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systemd.tmpfiles.rules = ["d ${usb_data.mountpoint} - chaos root"];
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systemd.services.enc-usb-mount = {
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path = [pkgs.util-linux pkgs.cryptsetup];
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wantedBy = ["multi-user.target"];
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script = ''
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${enc_usb_mount}/bin/enc_usb_mount
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'';
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};
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systemd.services.enc-usb-unmount = {
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path = [pkgs.util-linux pkgs.cryptsetup];
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script = ''
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${enc_usb_unmount}/bin/enc_usb_unmount
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'';
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};
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services.udev.extraRules = ''
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ACTION=="add", ENV{PARTNAME}=="${usb_data.encrypted_partlabel}", ENV{SYSTEMD_WANTS}="enc-usb-mount.service", ENV{UDISKS_PRESENTATION_HIDE}="1"
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ACTION=="remove", ENV{PARTNAME}=="${usb_data.encrypted_partlabel}", ENV{SYSTEMD_WANTS}="enc-usb-unmount.service"
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'';
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}
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