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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/>.
- #
- [ $# -eq 1 -a "$1" == "--summary" ] && exit 1
- if [ -t 0 ]; then
- echo >&2
- echo "Usage: clevis decrypt http < JWE > PLAINTEXT" >&2
- echo >&2
- exit 1
- fi
- read -d . hdr
- if [ "`jose fmt -q "$hdr" -SyOg clevis -g pin -u-`" != "http" ]; then
- echo "JWE pin mismatch!" >&2
- exit 1
- fi
- if ! url=`jose fmt -q "$hdr" -SyOg clevis -g http -g url -u-`; then
- echo "JWE missing 'clevis.http.url' header parameter!" >&2
- exit 1
- fi
- if ! typ=`jose fmt -q "$hdr" -SyOg clevis -g http -g type -u-`; then
- echo "JWE missing 'clevis.http.url' header parameter!" >&2
- exit 1
- fi
- if ! rep=`curl -sfg -H "Accept: $typ" "$url"`; then
- echo "Key transfer failed!" >&2
- exit 1
- fi
- case $typ in
- application/jwk+json)
- if ! rep=`curl -sfg -H "Accept: $typ" "$url" \
- | jose fmt -j- -Og kty -q oct -EUUo-`; then
- echo "Key transfer failed!" >&2
- exit 1
- fi
- ;;
- application/octet-stream)
- if ! key=`curl -sfg -H "Accept: $typ" "$url" | jose b64 enc -I-`; then
- echo "Key transfer failed!" >&2
- exit 1
- fi
- jwk="{\"kty\":\"oct\",\"k\":\"$key\"}"
- ;;
- esac
- exec jose jwe dec -k- -i- < <(echo -n "$jwk$hdr."; cat)
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