qusal/salt/sys-ssh-agent/files/server/bin/qvm-ssh-agent
2023-11-13 14:33:28 +00:00

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#!/bin/sh
# SPDX-FileCopyrightText: 2023 Benjamin Grande M. S. <ben.grande.b@gmail.com>
#
# SPDX-License-Identifier: AGPL-3.0-or-later
set -eu
service="qubes-ssh-agent"
usage(){
echo "Usage: ${0##*/} [ls|add] <AGENT>
ls: list agent(s)
add: add keys to agent(s)
reload: reload/readd keys from agent(s)
Example:
${0##*/} ls work # list the work agent keys
${0##*/} add work # add keys to the work agent
${0##*/} reload work # reload/readd keys from the work agent"
exit 1
}
ls_agent(){
socket="/tmp/${service}/$agent.sock"
test -S "$socket" || return 1
agent="$(echo "$socket" | sed "s|.*${service}/||;s/\.sock//")"
echo "Agent: ($agent) $socket"
SSH_AUTH_SOCK="$socket" ssh-add -l || true
}
add_agent(){
# shellcheck disable=SC2174
mkdir -m 0700 -p "/tmp/${service}"
dir="$HOME/.ssh/identities.d/${agent}"
if ! test -d "$dir"; then
echo "Directory not found: $dir" >&2
return 1
fi
dir="${dir##*/}"
socket="/tmp/${service}/${dir}.sock"
if ! test -S "$socket"; then
reload_agent=1
ssh-agent -a "/tmp/${service}/${agent}.sock"
fi
if ! test "${reload_agent}" = "1"; then
return
fi
keys="$(grep -sl -- "-----BEGIN OPENSSH PRIVATE KEY-----" \
"$HOME/.ssh/identities.d/$dir"/* || true)"
if test -z "$keys"; then
echo "Directory has no key: $dir" >&2
return 1
fi
SSH_AUTH_SOCK="$socket" ssh-add -D 2>/dev/null || true
for k in $(printf '%s\n' "$keys"); do
test -f "$k" || continue
ssh_add_option=""
if test -f "$k.ssh-add-option"; then
ssh_add_option="$(cat "$k.ssh-add-option")"
fi
# shellcheck disable=SC2086
SSH_AUTH_SOCK="$socket" ssh-add $ssh_add_option "$k"
done
}
test -z "${2-}" && usage
action="${1-}"
agent="${2-}"
reload_agent=""
case "$action" in
ls) ls_agent;;
add) add_agent;;
reload) reload_agent="1"; add_agent;;
*) usage;;
esac