/usr/lib/x86_64-linux-gnu/clevis-luks-askpass is in clevis-systemd 8-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 | #!/bin/bash -e
# vim: set tabstop=8 shiftwidth=4 softtabstop=4 expandtab smarttab colorcolumn=80:
#
# Copyright (c) 2016 Red Hat, Inc.
# Author: Harald Hoyer <harald@redhat.com>
# 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/>.
#
UUID=cb6e8904-81ff-40da-a84a-07ab9ab5715e
shopt -s nullglob
for question in /run/systemd/ask-password/ask.*; do
d=
s=
while read line; do
case "$line" in
Id=cryptsetup:*) d="${line##Id=cryptsetup:}";;
Socket=*) s="${line##Socket=}";;
esac
done < "$question"
[ -z "$d" -o -z "$s" ] && continue
luksmeta show -d "$d" | while read -r slot state uuid; do
[ "$state" != "active" ] && continue
[ "$uuid" != "$UUID" ] && continue
if pt="`luksmeta load -d $d -s $slot -u $UUID | clevis decrypt`"; then
echo -n "+$pt" | socat -U "UNIX:$s" -
break
fi
done
done
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