clevis/src/pins/tang/pin-tang

#!/bin/bash -x
# vim: set tabstop=8 shiftwidth=4 softtabstop=4 expandtab smarttab colorcolumn=80:
#
# Copyright (c) 2016 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/>.
#

function on_exit() {
    if [ "$PID" ]; then kill $PID; wait $PID || true; fi
    [ -d "$TMP" ] && rm -rf "$TMP"
}

trap 'on_exit' EXIT
trap 'exit' ERR

TMP="$(mktemp -d)"
mkdir -p "$TMP"/db
mkdir -p "$TMP"/cache

# Generate the server keys
"${TANGD_KEYGEN}" "$TMP"/db sig exc
"${TANGD_UPDATE}" "$TMP"/db "$TMP"/cache

# Start the server
port="$(shuf -i 1024-65536 -n 1)"

inetd='--inetd'
[ "${SD_ACTIVATE##*/}" = "systemd-activate" ] && inetd=

"$SD_ACTIVATE" $inetd -l 127.0.0.1:"$port" -a "$TANGD" "$TMP"/cache &
PID=$!
sleep 0.25

thp="$(jose jwk thp -i "$TMP/db/sig.jwk")"
adv="$TMP/cache/default.jws"
url="http://localhost:${port}"

cfg="$(printf '{"url":"%s","adv":"%s"}' "$url" "$adv")"
enc="$(echo -n "hi" | clevis encrypt tang "$cfg")"
dec="$(echo -n "$enc" | clevis decrypt)"
test "$dec" == "hi"

cfg="$(printf '{"url":"%s","thp":"%s"}' "$url" "$thp")"
enc="$(echo -n "hi" | clevis encrypt tang "$cfg")"
dec="$(echo -n "$enc" | clevis decrypt)"
test "$dec" == "hi"

kill -9 $PID
! wait $PID
unset PID

! echo "$enc" | clevis decrypt