Marc S. Weidner
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Signed-off-by: Marc S. Weidner <msw@coresecret.dev>
110 lines
2.8 KiB
Bash
110 lines
2.8 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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# Generates salt.
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# Globals:
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# ERR_GENERATE_SALT
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# NL
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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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# ERR_GENERATE_SALT
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#######################################
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generate_salt() {
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declare var_salt=""
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while :; do
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# shellcheck disable=SC2312
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var_salt=$(head -c 12 /dev/random | base64 | tr -dc 'A-Za-z0-9' | head -c 16) || return "${ERR_GENERATE_SALT}"
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[[ ${#var_salt} -eq 16 ]] && break
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done
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printf '%s%b' "${var_salt}" "${NL}"
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return 0
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}
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#######################################
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# Reads and validates a secure one-line password file.
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# Globals:
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# ERR_READ_PASS_FILE
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# VAR_DEBUG_TRACE
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# Arguments:
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# 1: Path to password file
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# 2: Name of target variable (via nameref)
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# Returns:
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# 0: on success
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# ERR_READ_PASS_FILE
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#######################################
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read_password_file() {
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declare -r var_input_file="${1}"
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declare -n var_output_file="${2}"
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declare -a ary_lines=()
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guard_trace on
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if [[ ! -f "${var_input_file}" ]]; then
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do_log "fatal" "file_only" "0104() Password file '${var_input_file}' not found."
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return "${ERR_READ_PASS_FILE}"
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fi
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mapfile -t ary_lines < "${var_input_file}"
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if (( ${#ary_lines[@]} != 1 )); then
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do_log "fatal" "file_only" "0104() Password file '${var_input_file}' MUST contain exactly one line."
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return "${ERR_READ_PASS_FILE}"
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fi
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var_output_file="${ary_lines[0]}"
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### Trim leading and trailing whitespace.
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var_output_file="${var_output_file#"${var_output_file%%[![:space:]]*}"}" ### leading
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var_output_file="${var_output_file%"${var_output_file##*[![:space:]]}"}" ### trailing
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if [[ -z "${var_output_file}" ]]; then
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do_log "fatal" "file_only" "0104() Password file '${var_input_file}' contains only whitespace."
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return "${ERR_READ_PASS_FILE}"
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fi
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guard_trace off
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sync
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if shred -vfzu -n 5 "${var_input_file}" > /dev/null 2>&1; then
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do_log "info" "file_only" "0104() Password file '${var_input_file}': shred -vfzu -n 5 >> done."
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else
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do_log "warn" "file_only" "0104() Password file '${var_input_file}': shred -vfzu -n 5 >> NOT successful."
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fi
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sync
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unset ary_lines
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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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