#!/bin/bash

# Copyright 2017 Peter Palfrader
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.


set -e
set -u

CONFFILE=/etc/dsa/postgresql-backup/sshkeys-sources
OUTFILE=/etc/ssh/userkeys/debbackup
HEAD=/etc/dsa/postgresql-backup/sshkeys-manual

cat > "${OUTFILE}.new" << EOF
# ###################
# This file was created using postgres-make-backup-sshauthkeys.
# Do not edit this manually but edit its sources and run the script (or let puppet run it for you).
#####################
EOF

if [ -e "$HEAD" ] ; then
	echo "# $HEAD" >> "${OUTFILE}.new"
	cat "$HEAD" >> "${OUTFILE}.new"
	echo "# end of $HEAD" >> "${OUTFILE}.new"
	echo "" >> "${OUTFILE}.new"
fi

egrep -v '^(#|$)' "$CONFFILE" |
	while read host ipaddr key; do

	if [[ "$host" =~ [^a-z0-9A-Z_-] ]]; then
		echo >&2 "Invalid hostname $host"
		continue
	fi
	if [[ "$ipaddr" =~ [^0-9a-fA-F:.,] ]]; then
		echo >&2 "Invalid ipaddr $ipaddr"
		continue
	fi

	echo "command=\"/usr/local/bin/debbackup-ssh-wrap $host\",from=\"$ipaddr\",restrict $key" >> "${OUTFILE}.new"
done

mv "${OUTFILE}.new" ${OUTFILE}
# vim:syn=sh: