Marc S. Weidner
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Signed-off-by: Marc S. Weidner <msw@coresecret.dev>
268 lines
9.9 KiB
Bash
268 lines
9.9 KiB
Bash
#!/bin/bash
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# SPDX-Version: 3.0
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# SPDX-CreationInfo: 2025-02-13; WEIDNER, Marc S.; <cendev@coresecret.eu>
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# SPDX-ExternalRef: GIT https://cendev.eu/marc.weidner/CISS.2025.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.; <cendev@coresecret.eu>
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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.2025.hardened.installer framework.
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# SPDX-PackageName: CISS.2025.hardened.installer
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# SPDX-Security-Contact: security@coresecret.eu
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###########################################################################################
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# 3.6.1. Functions - installation - mount partition #
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###########################################################################################
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###########################################################################################
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# Function to generate btrfs-subvolumes.
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# Globals:
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# ERR_CREAT_SUB_VOL
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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 MOUNT_PATH="$1"
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declare SUBVOLUME="$2"
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btrfs subvolume create "${TARGET}${MOUNT_PATH}/${SUBVOLUME}" || {
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do_log "error" "false" "Error occurred at creation of subvolume: '${SUBVOLUME}' in: '${TARGET}${MOUNT_PATH}'."
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exit "${ERR_CREAT_SUB_VOL}"
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}
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do_log "info" "false" "Created: '${SUBVOLUME}' at: '${TARGET}${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_PATH
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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 MOUNT_PATH="$1"
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declare MOUNT_DEVICE="$2"
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declare MOUNT_OPTIONS="$3"
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if [[ ${MOUNT_PATH} == "/" ]]; then
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MOUNT_PATH=""
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fi
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# Create directory
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mkdir -p "${TARGET}${MOUNT_PATH}"
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# Mount routine
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mount "${MOUNT_OPTIONS:+-o $MOUNT_OPTIONS}" "${MOUNT_DEVICE}" "${TARGET}${MOUNT_PATH}" || {
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do_log "error" "false" "Error occurred at mounting '${MOUNT_DEVICE}' on: '${TARGET}${MOUNT_PATH}'."
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exit "${ERR_MOUNTING_PATH}"
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}
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do_log "info" "false" "Mounted: '${MOUNT_DEVICE}' on: '${TARGET}${MOUNT_PATH}' with: '${MOUNT_OPTIONS}'."
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}
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###########################################################################################
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# Function for mounting all partitions for debootstrap incl. generating btrfs subvolumes.
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# Globals:
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# ERR_MOUNTING_ROOT
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# ERR_NO_DEVIC_PATH
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# ERR_NO_ENCR_LABEL
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# MAP_EPHEMERAL_DEV
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# MAP_MOUNTPATH_DEV
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# MODULE_ERR
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# MODULE_TXT
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# RECIPE_STRING
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# TARGET
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# Arguments:
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# None
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###########################################################################################
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3_6_1_functions_installation_mount_partition() {
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declare -g -x MODULE_ERR="3_6_1_functions_installation_mount_partition"
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declare -g -x MODULE_TXT="Mounting all partitions for debootstrap incl. generating btrfs subvolumes"
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do_show_header "${MODULE_TXT}"
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# Mount "/"-filesystem
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declare -r MOUNT_PATH_ROOT="/"
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if [[ -n ${MAP_MOUNTPATH_DEV[$MOUNT_PATH_ROOT]} ]]; then
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mount_with_dir "${MOUNT_PATH_ROOT}" "${MAP_MOUNTPATH_DEV[$MOUNT_PATH_ROOT]}"
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else
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do_log "error" "false" "Root-filesystem '${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 PATH
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for PATH in "/boot" "/boot/efi"; do
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if [[ -n ${MAP_MOUNTPATH_DEV[$PATH]} ]]; then
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mount_with_dir "${PATH}" "${MAP_MOUNTPATH_DEV[$PATH]}"
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else
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do_log "info" "false" "Entry '${PATH}' not found in Hashmap."
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fi
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done
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# Mounting all remaining keys of hashmap 'MAP_MOUNTPATH_DEV'.
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declare KEY
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declare TRANSFORMED_STRING
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declare DEVICE_PATH
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declare ENCRYPTION_LABEL
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declare MATCHING_VAR
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for KEY in "${!MAP_MOUNTPATH_DEV[@]}"; do
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# Initialize variables
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DEVICE_PATH="${MAP_MOUNTPATH_DEV[${KEY}]}"
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# if KEY:VALUE equals "/dev/${DEV}${PARTITION}"
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if [[ ${DEVICE_PATH} =~ ^/dev/[a-zA-Z]+[0-9]+$ ]]; then
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TRANSFORMED_STRING=$(echo "${DEVICE_PATH}" | sed 's|/dev/|dev_|; s|\([a-zA-Z]\)\([0-9]\)|\1_\2|')
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# if KEY:VALUE equals "/dev/mapper/${ENCRYPTION_LABEL}"
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elif [[ ${DEVICE_PATH} =~ ^/dev/mapper/ ]]; then
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# Extract ENCRYPTION_LABEL
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ENCRYPTION_LABEL="${DEVICE_PATH#/dev/mapper/}"
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# Search matching variable of sourced "${PRESEED}" variable file
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MATCHING_VAR=$(declare -p | grep -oP "recipe_[^ ]+_encryption_label=${ENCRYPTION_LABEL}")
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if [[ -n ${MATCHING_VAR} ]]; then
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# Extract third, fourth and fifth part of the respective variable
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TRANSFORMED_STRING=$(echo "${MATCHING_VAR}" | sed -E 's|recipe_([^_]+_[^_]+_[^_]+)_.*|\1|')
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else
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do_log "error" "false" "No matching variable found for ENCRYPTION_LABEL='${ENCRYPTION_LABEL}'."
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exit "${ERR_NO_ENCR_LABEL}"
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fi
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else
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do_log "error" "false" "Unknown DEVICE_PATH-Format: '${DEVICE_PATH}'."
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exit "${ERR_NO_DEVIC_PATH}"
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fi
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declare BTRFS_COMPR_VAR="recipe_${RECIPE_STRING}_${TRANSFORMED_STRING}_filesystem_btrfs_compress"
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declare BTRFS_LEVEL_VAR="recipe_${RECIPE_STRING}_${TRANSFORMED_STRING}_filesystem_btrfs_level"
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declare ENCRYPTION_LABEL_VAR="recipe_${RECIPE_STRING}_${TRANSFORMED_STRING}_encryption_label"
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declare FILESYSTEM_LABEL_VAR="recipe_${RECIPE_STRING}_${TRANSFORMED_STRING}_filesystem_label"
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declare FILESYSTEM_VERSION_VAR="recipe_${RECIPE_STRING}_${TRANSFORMED_STRING}_filesystem_version"
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declare MOUNT_OPTIONS_VAR="recipe_${RECIPE_STRING}_${TRANSFORMED_STRING}_mount_options"
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declare MOUNT_SUBVOLUME_VAR="recipe_${RECIPE_STRING}_${TRANSFORMED_STRING}_mount_subvolume"
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declare BTRFS_COMPR=${!BTRFS_COMPR_VAR}
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declare BTRFS_LEVEL=${!BTRFS_LEVEL_VAR}
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declare ENCRYPTION_LABEL=${!ENCRYPTION_LABEL_VAR}
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declare FILESYSTEM_LABEL=${!FILESYSTEM_LABEL_VAR}
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declare FILESYSTEM_VERSION=${!FILESYSTEM_VERSION_VAR}
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declare MOUNT_OPTIONS=${!MOUNT_OPTIONS_VAR}
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declare MOUNT_SUBVOLUME=${!MOUNT_SUBVOLUME_VAR}
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# Skip already mounted paths ("/", "/boot", "/boot/efi")
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if [[ ${KEY} == "/" || ${KEY} == "/boot" || ${KEY} == "/boot/efi" ]]; then
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continue
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fi
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if [[ ${FILESYSTEM_VERSION,,} == "btrfs" ]]; then
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declare BTRFS_OPTIONS="compress=${BTRFS_COMPR}:${BTRFS_LEVEL}"
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mount_with_dir "${KEY}" "${DEVICE_PATH}" "${BTRFS_OPTIONS}"
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[[ -n ${MOUNT_SUBVOLUME} ]] && create_btrfs_subvolume "${KEY}" "${MOUNT_SUBVOLUME}"
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elif [[ ${FILESYSTEM_VERSION,,} == "ext4" ]]; then
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mount_with_dir "${KEY}" "${DEVICE_PATH}"
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else
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do_log "error" "false" "No valid filesystem: '${FILESYSTEM_VERSION}' found for ${KEY}."
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fi
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done
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# Reminder: MAP_EPHEMERALLABEL_DEV["${MOUNT_PATH}"]="/dev/${DEV}${PARTITION}"
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# Mounting remaining entries of hashmap 'MAP_EPHEMERALLABEL_DEV'.
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declare KEY
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declare TRANSFORMED_STRING
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declare DEVICE_PATH
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for KEY in "${!MAP_EPHEMERAL_DEV[@]}"; do
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# Initialize variables
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DEVICE_PATH="${MAP_EPHEMERAL_DEV[${KEY}]}"
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# if KEY:VALUE equals "/dev/${DEV}${PARTITION}"
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if [[ ${DEVICE_PATH} =~ ^/dev/[a-zA-Z]+[0-9]+$ ]]; then
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TRANSFORMED_STRING=$(echo "${DEVICE_PATH}" | sed 's|/dev/|dev_|; s|\([a-zA-Z]\)\([0-9]\)|\1_\2|')
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# if KEY:VALUE equals "/dev/mapper/${ENCRYPTION_LABEL}"
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elif [[ ${DEVICE_PATH} =~ ^/dev/mapper/ ]]; then
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# Extract ENCRYPTION_LABEL
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ENCRYPTION_LABEL="${DEVICE_PATH#/dev/mapper/}"
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# Search matching variable of sourced "${PRESEED}" variable file
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MATCHING_VAR=$(declare -p | grep -oP "recipe_[^ ]+_encryption_label=${ENCRYPTION_LABEL}")
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if [[ -n ${MATCHING_VAR} ]]; then
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# Extract third, fourth and fifth part of the respective variable
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TRANSFORMED_STRING=$(echo "${MATCHING_VAR}" | sed -E 's|recipe_[^_]+_(dev_[^_]+_[^_]+)_.*|\1|')
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else
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do_log "error" "false" "No matching variable found for ENCRYPTION_LABEL='${ENCRYPTION_LABEL}'."
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exit "${ERR_NO_ENCR_LABEL}"
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fi
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else
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do_log "error" "false" "Unknown DEVICE_PATH-Format: '${DEVICE_PATH}'."
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exit "${ERR_NO_DEVIC_PATH}"
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fi
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declare ENCRYPTION_LABEL_VAR="recipe_${RECIPE_STRING}_${TRANSFORMED_STRING}_encryption_label"
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declare FILESYSTEM_LABEL_VAR="recipe_${RECIPE_STRING}_${TRANSFORMED_STRING}_filesystem_label"
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declare MOUNT_OPTIONS_VAR="recipe_${RECIPE_STRING}_${TRANSFORMED_STRING}_mount_options"
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declare ENCRYPTION_LABEL=${!ENCRYPTION_LABEL_VAR}
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declare FILESYSTEM_LABEL=${!FILESYSTEM_LABEL_VAR}
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declare MOUNT_OPTIONS=${!MOUNT_OPTIONS_VAR}
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if [[ ${KEY} == "SWAP" ]]; then
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cryptsetup open --type plain --key-file /dev/random \
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--offset 2048 --cipher aes-xts-plain64 --key-size 512 \
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--sector-size 4096 "/dev/disk/by-label/${FILESYSTEM_LABEL}" "${ENCRYPTION_LABEL}"
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mkswap "/dev/mapper/${ENCRYPTION_LABEL}"
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swapon "/dev/mapper/${ENCRYPTION_LABEL}"
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do_log "info" "false" "Mounted: '${KEY}' on: '/dev/mapper/${ENCRYPTION_LABEL}'."
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elif [[ ${KEY} == "/tmp" ]]; then
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cryptsetup open --type plain --key-file /dev/random \
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--offset 2048 --cipher aes-xts-plain64 --key-size 512 \
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--sector-size 4096 "/dev/disk/by-label/${FILESYSTEM_LABEL}" "${ENCRYPTION_LABEL}"
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mkdir -p "${TARGET}/tmp"
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mount "${MOUNT_OPTIONS:+-o $MOUNT_OPTIONS}" "/dev/mapper/${ENCRYPTION_LABEL}" "${TARGET}/tmp"
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do_log "info" "false" "Mounted: '${KEY}' on: '/dev/mapper/${ENCRYPTION_LABEL}'."
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else
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do_log "warn" "false" "Ephemeral configuration for ${KEY} is not valid or disabled."
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fi
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done
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do_log "info" "false" "All devices of 'MAP_MOUNTPATH_DEV' and 'MAP_EPHEMERALLABEL_DEV' successfully mounted."
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do_show_footer "${MODULE_TXT}"
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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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