Marc S. Weidner
353568eb69
All checks were successful
🛡️ Shell Script Linting / 🛡️ Shell Script Linting (push) Successful in 1m54s
Signed-off-by: Marc S. Weidner <msw@coresecret.dev>
59 lines
1.9 KiB
Bash
59 lines
1.9 KiB
Bash
#!/bin/bash
|
|
# SPDX-Version: 3.0
|
|
# SPDX-CreationInfo: 2025-06-17; WEIDNER, Marc S.; <msw@coresecret.dev>
|
|
# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.installer.git
|
|
# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
|
|
# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
|
|
# SPDX-FileType: SOURCE
|
|
# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
|
|
# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
|
|
# SPDX-PackageName: CISS.debian.installer
|
|
# SPDX-Security-Contact: security@coresecret.eu
|
|
|
|
guard_sourcing
|
|
|
|
#######################################
|
|
# Remove any leading or trailing whitespace.
|
|
# Arguments:
|
|
# 1: String to clean.
|
|
#######################################
|
|
remove_whitespace() {
|
|
# shellcheck disable=SC2155
|
|
declare var_out=$(printf "%s" "$1" | xargs)
|
|
printf '%s' "${var_out}"
|
|
}
|
|
### Prevents accidental 'unset -f'.
|
|
# shellcheck disable=SC2034
|
|
readonly -f remove_whitespace
|
|
|
|
#######################################
|
|
# Function to escape all shell metacharacters
|
|
# Arguments:
|
|
# 1: String to Sanitize
|
|
#######################################
|
|
sanitize_input() {
|
|
declare input="$1"
|
|
### %q quotes the string so that the shell re-reads it as the original literal
|
|
printf '%q' "${input}"
|
|
}
|
|
### Prevents accidental 'unset -f'.
|
|
# shellcheck disable=SC2034
|
|
readonly -f sanitize_input
|
|
|
|
#######################################
|
|
# Function to remove any character not in the allowed set
|
|
# Arguments:
|
|
# 1: String to Sanitize
|
|
#######################################
|
|
sanitize_string() {
|
|
declare input="$1"
|
|
### Define allowed characters:
|
|
### letters, digits, dot, underscore, slash, equals, [, ], colon, double-quote, hyphen, space.
|
|
declare allowed='a-zA-Z0-9._/=\[\]:"\-+ '
|
|
printf '%s' "${input}" | tr -cd "${allowed}"
|
|
}
|
|
### Prevents accidental 'unset -f'.
|
|
# shellcheck disable=SC2034
|
|
readonly -f sanitize_string
|
|
# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
|