Marc S. Weidner
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Signed-off-by: Marc S. Weidner <msw@coresecret.dev>
226 lines
9.2 KiB
Bash
226 lines
9.2 KiB
Bash
#!/bin/bash
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# SPDX-Version: 3.0
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# SPDX-CreationInfo: 2025-06-17; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.installer.git
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# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
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# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-FileType: SOURCE
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# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
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# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
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# SPDX-PackageName: CISS.debian.installer
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# SPDX-Security-Contact: security@coresecret.eu
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guard_sourcing
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#######################################
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# Function to generate btrfs-subvolumes.
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# Globals:
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# ERR_BTRFS_SUBVOL
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# TARGET
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# Arguments:
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# $1: MOUNT_PATH
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# $2: SUBVOLUME
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#######################################
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create_btrfs_subvolume() {
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declare var_mount_path="$1"
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declare var_subvolume="$2"
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btrfs subvolume create "${TARGET}${var_mount_path}/${var_subvolume}" || {
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do_log "error" "false" "Error occurred at creation of subvolume: '${var_subvolume}' in: '${TARGET}${var_mount_path}'."
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exit "${ERR_BTRFS_SUBVOL}"
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}
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do_log "info" "false" "Created: '${var_subvolume}' at: '${TARGET}${var_mount_path}'."
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}
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#######################################
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# Function to create the mount path and mount the respective device on it.
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# Globals:
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# ERR_MOUNTING_DEV
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# TARGET
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# Arguments:
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# $1: MOUNT_PATH
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# $2: MOUNT_DEVICE
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# $3: MOUNT_OPTIONS
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#######################################
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mount_with_dir() {
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declare var_mount_path="$1" var_mount_device="$2" var_mount_options="$3"
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if [[ "${var_mount_path}" == "/" ]]; then
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:
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else
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mkdir -p "${TARGET}${var_mount_path}"
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fi
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### Build the command in an array to keep word boundaries intact
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declare -a ary_cmd=(mount)
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ary_cmd+=("${var_mount_device}" "${TARGET}${var_mount_path}")
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[[ -n "${var_mount_options}" ]] && ary_cmd+=("-o" "${var_mount_options}")
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"${ary_cmd[@]}" || {
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do_log "error" "false" "Mounting '${var_mount_device}' on '${TARGET}${var_mount_path}' failed."
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exit "${ERR_MOUNTING_DEV}"
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}
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do_log "info" "false" "Mounted: '${var_mount_device}' on: '${TARGET}${var_mount_path}' (Options='${var_mount_options}')."
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}
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#######################################
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# Device Path Resolver
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# Arguments:
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# $1: Device
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# $2: Partition
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# $3: Boolean Encryption
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# $4: Encryption Label
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#######################################
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resolve_device() {
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declare local_var_dev="$1" local_var_partition="$2" encryption_boolean="$3" local_var_enc_label="$4"
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[[ "${encryption_boolean}" == true ]] && printf '/dev/mapper/%s' "${local_var_enc_label}" \
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|| printf '/dev/%s%s' "${local_var_dev}" "${local_var_partition}"
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}
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#######################################
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# YAML Parser Null String exception Handler.
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# Arguments:
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# $1: Key String to evaluate
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# $2: YAML File
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#######################################
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yq_val() {
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# shellcheck disable=SC2155
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declare var_helper=$(yq e "$1" "$2")
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[[ "${var_helper}" == "null" ]] && var_helper=""
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printf '%s' "${var_helper}"
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}
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#######################################
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# Function for mounting all partitions for debootstrap, including the generation of btrfs subvolumes.
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# Globals:
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# ERR_MOUNTING_ROOT
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# HMP_MOUNTPATH_DEV
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# TARGET
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# VAR_RECIPE_STRING
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# VAR_SETUP_PART
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# var_fs_options
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# Arguments:
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# None
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#######################################
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mount_partition() {
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### Mount "/"-filesystem
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declare -r var_mount_path_root="/"
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if [[ -n ${HMP_MOUNTPATH_DEV[$var_mount_path_root]} ]]; then
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mount_with_dir "${var_mount_path_root}" "${HMP_MOUNTPATH_DEV[$var_mount_path_root]}"
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else
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do_log "error" "false" "Root-filesystem '${var_mount_path_root}' not found in Hashmap."
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exit "${ERR_MOUNTING_ROOT}"
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fi
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### Ensure order of "/boot" and "/boot/efi"
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declare var_path
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for var_path in "/boot" "/boot/efi"; do
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if [[ -n ${HMP_MOUNTPATH_DEV[${var_path}]} ]]; then
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mount_with_dir "${var_path}" "${HMP_MOUNTPATH_DEV[${var_path}]}"
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else
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do_log "info" "false" "Entry '${var_path}' not found in Hashmap."
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fi
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done
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declare var_dev var_part var_fs_btrfs_compress var_fs_btrfs_level var_encryption_enable var_encryption_label \
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var_fs_label var_fs_version var_mount_path var_mount_options var_mount_subvolume
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declare -a ary_devs ary_parts
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### Iterate over all devices in the recipe.
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readarray -t ary_devs < <(yq e ".recipe.${VAR_RECIPE_STRING}.dev | keys | .[]" "${VAR_SETUP_PART}")
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for var_dev in "${ary_devs[@]}"; do
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### Iterate over all partitions for this device.
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readarray -t ary_parts < <(yq e ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev} | keys | .[]" "${VAR_SETUP_PART}")
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for var_part in "${ary_parts[@]}"; do
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### Extract parameters from YAML.
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var_fs_btrfs_compress=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.filesystem.btrfs.compress" "${VAR_SETUP_PART}")
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var_fs_btrfs_level=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.filesystem.btrfs.level" "${VAR_SETUP_PART}")
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var_encryption_enable=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.encryption.enable" "${VAR_SETUP_PART}")
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var_encryption_label=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.encryption.label" "${VAR_SETUP_PART}")
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var_fs_label=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.filesystem.label" "${VAR_SETUP_PART}")
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var_fs_version=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.filesystem.version" "${VAR_SETUP_PART}")
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var_mount_path=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.mount.path" "${VAR_SETUP_PART}")
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var_mount_options=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.mount.options" "${VAR_SETUP_PART}")
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var_mount_subvolume=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.mount.subvolume" "${VAR_SETUP_PART}")
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### Skip already mounted paths ("/", "/boot", "/boot/efi") and skip ("/recovery")
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if [[ "${var_mount_path}" == "/" || "${var_mount_path}" == "/boot" || "${var_mount_path}" == "/boot/efi" || "${var_mount_path}" == "/recovery" ]]; then
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continue
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fi
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if [[ "${var_mount_path}" == "SWAP" ]]; then
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cryptsetup open --type plain --key-file /dev/random \
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--offset 2048 --cipher aes-xts-plain64 --key-size 512 \
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--sector-size 4096 "/dev/disk/by-label/${var_fs_label}" "${var_encryption_label}"
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mkswap "/dev/mapper/${var_encryption_label}"
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swapon "/dev/mapper/${var_encryption_label}"
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do_log "info" "false" "Mounted: '${var_mount_path}' on: '/dev/mapper/${var_encryption_label}'."
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elif [[ "${var_mount_path}" == "/tmp" ]]; then
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cryptsetup open --type plain --key-file /dev/random \
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--offset 2048 --cipher aes-xts-plain64 --key-size 512 \
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--sector-size 4096 "/dev/disk/by-label/${var_fs_label}" "${var_encryption_label}"
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mkdir -p "${TARGET}/tmp"
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mkfs.ext4 "/dev/mapper/${var_encryption_label}" "${var_fs_options:+ $var_fs_options}"
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mount "${var_mount_options:+-o $var_mount_options}" "/dev/mapper/${var_encryption_label}" "${TARGET}/tmp"
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do_log "info" "false" "Mounted: '${var_mount_path}' on: '/dev/mapper/${var_encryption_label}'."
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fi
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case "${var_fs_version,,}:${var_encryption_enable}" in
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btrfs:true)
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declare var_btrfs_compression_options="compress=${var_fs_btrfs_compress}:${var_fs_btrfs_level}"
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# shellcheck disable=SC2155
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declare device=$(resolve_device "${var_dev}" "${var_part}" "${var_encryption_enable}" "${var_encryption_label}")
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mount_with_dir "${var_mount_path}" "${device}" "${var_btrfs_compression_options}"
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[[ -n ${var_mount_subvolume} ]] && create_btrfs_subvolume "${var_mount_path}" "${var_mount_subvolume}"
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do_log "info" "false" "Mounted: '${var_mount_path}' on: '${device}'."
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;;
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btrfs:false)
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declare var_btrfs_compression_options="compress=${var_fs_btrfs_compress}:${var_fs_btrfs_level}"
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# shellcheck disable=SC2155
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declare device=$(resolve_device "${var_dev}" "${var_part}" "${var_encryption_enable}" "${var_encryption_label}")
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mount_with_dir "${var_mount_path}" "${device}" "${var_btrfs_compression_options}"
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[[ -n ${var_mount_subvolume} ]] && create_btrfs_subvolume "${var_mount_path}" "${var_mount_subvolume}"
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do_log "info" "false" "Mounted: '${var_mount_path}' on: '${device}'."
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;;
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ext4:true)
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# shellcheck disable=SC2155
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declare device=$(resolve_device "${var_dev}" "${var_part}" "${var_encryption_enable}" "${var_encryption_label}")
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mount_with_dir "${var_mount_path}" "${device}"
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do_log "info" "false" "Mounted: '${var_mount_path}' on: '${device}'."
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;;
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ext4:false)
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# shellcheck disable=SC2155
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declare device=$(resolve_device "${var_dev}" "${var_part}" "${var_encryption_enable}" "${var_encryption_label}")
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mount_with_dir "${var_mount_path}" "${device}"
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do_log "info" "false" "Mounted: '${var_mount_path}' on: '${device}'."
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;;
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*) do_log "error" "false" "Unsupported fs/encryption combination."
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exit "${ERR_MOUNTING_DEV}" ;;
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esac
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done
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done
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}
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
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