#!/bin/sh
# cassh - Manager for an OpenSSH Certification Authority
#
# Written in 2022 by Lucas
#
# To the extent possible under law, the author(s) have dedicated all
# copyright and related and neighboring rights to this software to the
# public domain worldwide. This software is distributed without any
# warranty.
# You should have received a copy of the CC0 Public Domain Dedication
# along with this software. If not, see
# <http://creativecommons.org/publicdomain/zero/1.0/>.

usage()
{
	cat - <<EOF >&2
Usage:
	${0##*/} private_key cassh_command [options ...]
EOF
	exit 1
}

if [ $# -lt 2 ]; then
	usage
fi

cassh_command=$2
needs_agent=false
case $cassh_command in
issue)
	needs_agent=true
	;;
esac

if $needs_agent; then
	ssh-agent sh -s "$@" <<'EOF'
ssh-add -q "$1" && shift && cassh "$@"
rc=$?
ssh-agent -k >/dev/null
exit $rc
EOF
else
	shift
	cassh "$@"
fi