initcpio

.gitignore

@@ -2,8 +2,7 @@
 **/*.rs.bk
 .idea/
 *.iml
-result
 fido2luks.bash
 fido2luks.elv
 fido2luks.fish
-fido2luks.zsh
+fido2luks.zsh

PKGBUILD

@@ -17,10 +17,13 @@ pkgver() {
 
 build() {
     cargo build --release --locked --all-features --target-dir=target
+    target/release/${pkgname} completions target
 }
 
 package() {
     install -Dm 755 target/release/${pkgname} -t "${pkgdir}/usr/bin"
     install -Dm 755 ../pam_mount/fido2luksmounthelper.sh -t "${pkgdir}/usr/bin"
-    install -Dm 644 ../fido2luks.bash "${pkgdir}/usr/share/bash-completion/completions/fido2luks"
+    install -Dm 644 target/fido2luks.bash "${pkgdir}/usr/share/bash-completion/completions/fido2luks"
+    install -Dm 755 ../initcpio/hook.sh "${pkgdir}/usr/lib/initcpio/install/fido2luks"
+    install -Dm 755 ../initcpio/hook.sh "${pkgdir}/usr/lib/initcpio/hooks/fido2luks"
 }

flake.lock

@@ -1,61 +0,0 @@
-{
-  "nodes": {
-    "naersk": {
-      "inputs": {
-        "nixpkgs": [
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1612192764,
-        "narHash": "sha256-7EnLtZQWP6511G1ZPA7FmJlqAr3hWsAYb24tvTvJ/ec=",
-        "owner": "nmattia",
-        "repo": "naersk",
-        "rev": "6e149bfd726a8ebefa415f2d713ba6d942435abd",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nmattia",
-        "repo": "naersk",
-        "type": "github"
-      }
-    },
-    "nixpkgs": {
-      "locked": {
-        "lastModified": 1611910458,
-        "narHash": "sha256-//j54S14v9lp3YKizS1WZW3WKwLjGTzvwhHfUAaRBPQ=",
-        "path": "/nix/store/z5g10k571cc5q9yvr0bafzswp0ggawjw-source",
-        "rev": "6e7f25001fe6874f7ae271891f709bbf50a22c45",
-        "type": "path"
-      },
-      "original": {
-        "id": "nixpkgs",
-        "type": "indirect"
-      }
-    },
-    "root": {
-      "inputs": {
-        "naersk": "naersk",
-        "nixpkgs": "nixpkgs",
-        "utils": "utils"
-      }
-    },
-    "utils": {
-      "locked": {
-        "lastModified": 1610051610,
-        "narHash": "sha256-U9rPz/usA1/Aohhk7Cmc2gBrEEKRzcW4nwPWMPwja4Y=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "3982c9903e93927c2164caa727cd3f6a0e6d14cc",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    }
-  },
-  "root": "root",
-  "version": 7
-}

flake.nix

@@ -1,61 +0,0 @@
-{
-  description = "Decrypt your LUKS partition using a FIDO2 compatible authenticator";
-
-  inputs = {
-    utils.url = "github:numtide/flake-utils";
-    naersk = {
-      url = "github:nmattia/naersk";
-      inputs.nixpkgs.follows = "nixpkgs";
-    };
-  };
-
-  outputs = { self, nixpkgs, utils, naersk }:
-    let
-      root = ./.;
-      pname = (builtins.fromTOML (builtins.readFile ./Cargo.toml)).package.name;
-      forPkgs = pkgs:
-        let
-          naersk-lib = naersk.lib."${pkgs.system}";
-          buildInputs = with pkgs; [ cryptsetup ];
-          LIBCLANG_PATH = "${pkgs.clang.cc.lib}/lib";
-          nativeBuildInputs = with pkgs; [
-            pkgconfig
-            clang
-          ];
-        in
-        rec {
-          # `nix build`
-          packages.${pname} = naersk-lib.buildPackage {
-            inherit pname root buildInputs nativeBuildInputs LIBCLANG_PATH;
-          };
-          defaultPackage = packages.${pname};
-
-          # `nix run`
-          apps.${pname} = utils.lib.mkApp {
-            drv = packages.${pname};
-          };
-          defaultApp = apps.${pname};
-
-          # `nix flake check`
-          checks = {
-            fmt = with pkgs; runCommandLocal "${pname}-fmt" { buildInputs = [ cargo rustfmt nixpkgs-fmt ]; } ''
-              cd ${root}
-              cargo fmt -- --check
-              nixpkgs-fmt --check *.nix
-              touch $out
-            '';
-          };
-
-          # `nix develop`
-          devShell = pkgs.mkShell {
-            nativeBuildInputs = with pkgs; [ rustc cargo rustfmt nixpkgs-fmt ] ++ nativeBuildInputs;
-            inherit buildInputs LIBCLANG_PATH;
-          };
-        };
-      forSystem = system: forPkgs nixpkgs.legacyPackages."${system}";
-    in
-    (utils.lib.eachSystem [ "aarch64-linux" "i686-linux" "x86_64-linux" ] forSystem) // {
-      overlay = final: prev: (forPkgs final).packages;
-    };
-
-}

initcpio/hook.sh

@@ -0,0 +1,74 @@
+#!/bin/bash
+
+set -ax
+
+exit_with() {
+    echo "$1" >&2
+    exit 1
+}
+
+validate() {
+    [ ! -e /etc/fido2luks.conf ] && exit_with "/etc/fido2luks.conf does not exist! Please configure first"
+    . /etc/fido2luks.conf
+    [ ! -e "$FIDO2LUKS_DEVICE" ] && exit_with "FIDO2LUKS_DEVICE='$FIDO2LUKS_DEVICE' does not exist!"
+    [ -z "$FIDO2LUKS_CREDENTIAL_ID" ] && exit_with "FIDO2LUKS_CREDENTIAL_ID must be set!"
+    [ -z "$FIDO2LUKS_MAPPER_NAME" ] && exit_with "FIDO2LUKS_MAPPER_NAME must be set!"
+}
+
+build() {
+    local mod
+    add_binary "cryptsetup"
+    add_module "dm-crypt"
+    add_module "dm-integrity"
+    if [[ $CRYPTO_MODULES ]]; then
+        for mod in $CRYPTO_MODULES; do
+            add_module "$mod"
+        done
+    else
+        add_all_modules "/crypto/"
+    fi
+
+    add_binary "dmsetup"
+    add_file "/usr/lib/udev/rules.d/10-dm.rules"
+    add_file "/usr/lib/udev/rules.d/13-dm-disk.rules"
+    add_file "/usr/lib/udev/rules.d/95-dm-notify.rules"
+    add_file "/usr/lib/initcpio/udev/11-dm-initramfs.rules" "/usr/lib/udev/rules.d/11-dm-initramfs.rules"
+
+    add_systemd_unit "systemd-ask-password-console.path"
+    add_systemd_unit "systemd-ask-password-console.service"
+
+    # cryptsetup calls pthread_create(), which dlopen()s libgcc_s.so.1
+    add_binary "/usr/lib/libgcc_s.so.1"
+
+    # add mkswap for creating swap space on the fly (see 'swap' in crypttab(5))
+    add_binary "mkswap"
+
+    [[ -f /etc/crypttab.initramfs ]] && add_file "/etc/crypttab.initramfs" "/etc/crypttab"
+
+    validate 
+    add_file "/etc/fido2luks.conf" "/etc/fido2luks.conf"
+    add_binary "fido2luks" 
+    add_runscipt
+}
+
+run_hook() {
+    modprobe -a -q dm-crypt
+    . /etc/fido2luks.conf
+    if [ -z "$FIDO2LUKS_PASSWORD_HELPER" ]; then 
+        export FIDO2LUKS_PASSWORD_HELPER="systemd-ask-password 'FIDO2 password salt for $FIDO2LUKS_DEVICE'"
+    fi
+    fido2luks open
+}
+
+help() {
+    cat <<HELPEOF
+This hook allows for an encrypted root device with systemd initramfs.
+
+See the manpage of systemd-cryptsetup-generator(8) for available kernel
+command line options. Alternatively, if the file /etc/crypttab.initramfs
+exists, it will be added to the initramfs as /etc/crypttab. See the
+crypttab(5) manpage for more information on crypttab syntax.
+HELPEOF
+}
+
+# vim: set ft=sh ts=4 sw=4 et:

initcpio/keyscript.sh

@@ -0,0 +1,14 @@
+#!/bin/sh
+set -a
+. /etc/fido2luks.conf
+
+if [ -z "$FIDO2LUKS_PASSWORD_HELPER" ]; then
+	MSG="FIDO2 password salt for $CRYPTTAB_NAME"
+	export FIDO2LUKS_PASSWORD_HELPER="systemd-ask-password '$MSG'"
+fi
+
+if [ "$FIDO2LUKS_USE_TOKEN" -eq 1 ]; then
+	export FIDO2LUKS_CREDENTIAL_ID="$FIDO2LUKS_CREDENTIAL_ID,$(fido2luks token list --csv $CRYPTTAB_SOURCE)"
+fi
+
+fido2luks print-secret --bin