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src/clevis-decrypt
60 строк
2 KB
Christoph Biedl
Work around /dev/fd/X removal in systemd
14 янв 2021, 17:21
14 янв 2021, 17:21
c9747dc
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#!/bin/bash -e # vim: set tabstop=8 shiftwidth=4 softtabstop=4 expandtab smarttab colorcolumn=80: # # Copyright (c) 2017 Red Hat, Inc. # Author: Nathaniel McCallum <npmccallum@redhat.com> # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. # SUMMARY="Decrypts using the policy defined at encryption time" function findexe() { [ $# -eq 1 ] || return 1 while read -r -d: path; do [ -f "$path/$1" ] && [ -x "$path/$1" ] && echo "$path/$1" && return 0 done <<< "$PATH:" return 1 } if [ $# -eq 1 ] && [ "$1" == "--summary" ]; then echo "$SUMMARY" exit 0 fi if ! [ -t 0 ]; then read -r -d . hdr if ! pin="$(jose fmt -q "$hdr" -SyOg clevis -Og pin -Su-)"; then echo "JWE is missing the required 'clevis.pin' header property!" >&2 exit 1 fi if ! cmd="$(findexe clevis-decrypt-"$pin")"; then echo "Unable to locate pin '$pin'!" >&2 exit 1 fi (echo -n "$hdr."; /bin/cat) | "$cmd" exit $? fi exec >&2 echo echo "Usage: clevis decrypt < JWE > PLAINTEXT" echo echo "$SUMMARY" echo exit 2