Marc S. Weidner
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Signed-off-by: Marc S. Weidner <msw@coresecret.dev>
147 lines
7.1 KiB
Bash
147 lines
7.1 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 encrypt the respective partition on each device according to the chosen recipe string.
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# Globals:
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# DIR_BAK
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# DIR_CNF
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# HMP_EPHEMERAL_DEV
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# HMP_EPHEMERAL_ENCLABEL
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# HMP_EPHEMERAL_FS_LABEL
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# HMP_PATH_ENCLABEL
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# HMP_PATH_LUKSUUID
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# VAR_CRYPT_ROOT
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# VAR_RECIPE_STRING
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# VAR_SETUP_PART
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# Arguments:
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# None
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# Returns:
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# 0: on success
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#######################################
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partition_encryption() {
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### Declare Arrays and Variables.
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declare -Agx HMP_EPHEMERAL_DEV HMP_EPHEMERAL_ENCLABEL HMP_EPHEMERAL_FS_LABEL HMP_PATH_LUKSUUID HMP_PATH_ENCLABEL
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declare var_dev var_part \
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var_encryption_enable var_encryption_ephemeral var_encryption_integrity var_encryption_nuke var_encryption_cipher \
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var_encryption_hash var_encryption_iter var_encryption_key var_encryption_label var_encryption_meta \
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var_encryption_pbkdf var_encryption_rng var_filesystem_label var_mount_path var_uuid
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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 -r ".recipe.${VAR_RECIPE_STRING}.dev | keys | .[]" "${VAR_SETUP_PART}")
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for var_dev in "${ary_devs[@]}"; do
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### Iterate over all partitions for this device.
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readarray -t ary_parts < <(yq e -r ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev} | keys | .[]" "${VAR_SETUP_PART}")
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for var_part in "${ary_parts[@]}"; do
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### Extract parameters from YAML.
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var_encryption_enable=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.encryption.enable" "${VAR_SETUP_PART}")
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var_encryption_ephemeral=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.encryption.ephemeral" "${VAR_SETUP_PART}")
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var_encryption_integrity=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.encryption.integrity" "${VAR_SETUP_PART}")
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var_encryption_nuke=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.encryption.nuke" "${VAR_SETUP_PART}")
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var_encryption_cipher=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.encryption.cipher" "${VAR_SETUP_PART}")
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var_encryption_hash=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.encryption.hash" "${VAR_SETUP_PART}")
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var_encryption_iter=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.encryption.itertime" "${VAR_SETUP_PART}")
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var_encryption_key=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.encryption.key" "${VAR_SETUP_PART}")
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var_encryption_label=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.encryption.label" "${VAR_SETUP_PART}")
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var_encryption_meta=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.encryption.metadatasize" "${VAR_SETUP_PART}")
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var_encryption_pbkdf=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.encryption.pbkdf" "${VAR_SETUP_PART}")
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var_encryption_rng=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.encryption.rng" "${VAR_SETUP_PART}")
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var_filesystem_label=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.filesystem.label" "${VAR_SETUP_PART}")
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var_mount_path=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.mount.path" "${VAR_SETUP_PART}")
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if [[ "${var_encryption_enable,,}" != "true" ]]; then
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continue
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fi
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declare -a ary_luks_opts=(
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--key-file="${DIR_CNF}/password.txt"
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--type luks2
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--cipher "${var_encryption_cipher}"
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--hash "${var_encryption_hash}"
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--iter-time "${var_encryption_iter}"
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--key-size "${var_encryption_key}"
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--label "${var_encryption_label}"
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--luks2-metadata-size "${var_encryption_meta}"
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--pbkdf "${var_encryption_pbkdf}"
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--"${var_encryption_rng}"
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--batch-mode --verbose
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)
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[[ "${var_encryption_integrity,,}" == "true" ]] && ary_luks_opts+=(--integrity hmac-sha512)
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if [[ "${var_encryption_ephemeral,,}" == "true" ]]; then
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case "${var_mount_path}" in
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SWAP|/tmp)
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mkfs.ext4 -L "${var_filesystem_label}" "/dev/${var_dev}${var_part}" 1M
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do_log "info" "true" "Ephemeral: '${var_mount_path}' prepared on: '/dev/${var_dev}${var_part}'."
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HMP_EPHEMERAL_DEV["${var_mount_path}"]="/dev/${var_dev}${var_part}"
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HMP_EPHEMERAL_ENCLABEL["${var_mount_path}"]="${var_encryption_label}"
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HMP_EPHEMERAL_FS_LABEL["${var_mount_path}"]="${var_filesystem_label}"
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do_log "info" "true" "Stored in HashMap [HMP_EPHEMERAL_DEV] : '${var_mount_path}' -> '${HMP_EPHEMERAL_DEV["${var_mount_path}"]}'"
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do_log "info" "true" "Stored in HashMap [HMP_EPHEMERAL_ENCLABEL]: '${var_mount_path}' -> '${HMP_EPHEMERAL_ENCLABEL["${var_mount_path}"]}'"
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continue
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;;
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*)
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do_log "error" "true" "Invalid mount path: '${var_mount_path}' for partition: '/dev/${var_dev}${var_part}'."
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continue
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;;
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esac
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fi
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cryptsetup luksFormat "${ary_luks_opts[@]}" "/dev/${var_dev}${var_part}"
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if [[ "${var_encryption_integrity,,}" == "true" ]]; then
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do_log "info" "false" "Partition: '/dev/${var_dev}${var_part}' dm-integrity encrypted."
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else
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do_log "info" "false" "Partition: '/dev/${var_dev}${var_part}' encrypted."
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fi
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cryptsetup luksHeaderBackup --header-backup-file="${DIR_BAK}/luks_header_${var_dev}${var_part}.bak" "/dev/${var_dev}${var_part}"
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do_log "info" "false" "Partition: '/dev/${var_dev}${var_part}' LUKS Header saved: '${DIR_BAK}/luks_header_${var_dev}${var_part}.bak'."
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### Opening encrypted container.
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cryptsetup luksOpen "/dev/${var_dev}${var_part}" \
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--key-file="${DIR_CNF}/password.txt" \
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"${var_encryption_label}"
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do_log "info" "false" "Partition: '/dev/${var_dev}${var_part}' opened as '/dev/mapper/${var_encryption_label}'."
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### Store UUID of the LUKS container.
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var_uuid=$(blkid -s UUID -o value "/dev/mapper/${var_encryption_label}")
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# shellcheck disable=SC2155
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[[ "${var_mount_path}" == "/" ]] && declare -grx VAR_CRYPT_ROOT="${var_uuid}"
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[[ "${var_mount_path}" == "/recovery" ]] && declare -grx VAR_CRYPT_RECOVERY="${var_uuid}"
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HMP_PATH_LUKSUUID["UUID_${var_mount_path}"]="${var_uuid}"
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HMP_PATH_ENCLABEL["LABEL_${var_mount_path}"]="${var_encryption_label}"
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done
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done
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return 0
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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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