blob: 0b931458a1e6f22d6473db2be87b3c03a1be4086 (
plain)
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
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
#!/bin/sh
# Open Infrastructure: service-tools
# Copyright (C) 2014-2021 Daniel Baumann <daniel.baumann@open-infrastructure.net>
#
# SPDX-License-Identifier: GPL-3.0+
#
# 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 <https://www.gnu.org/licenses/>.
set -e
HOOK="$(basename "${0}")"
HOOK_ACTION="$(echo "${HOOK}" | awk -F. '{ print $1 }')"
# set nsupdate action
case "${HOOK}" in
clean_challenge.*)
HOOK_ACTION="delete"
;;
deploy_challenge.*)
HOOK_ACTION="add"
;;
*)
echo "'${HOOK}': no such hook action '${HOOK_ACTION}'" >&2
echo "'${HOOK}': use 'clean_challenge.' or 'deploy_challenge.' as prefix in your symlink" >&2
exit 1
;;
esac
# alternatives handling for dig
if command -v kdig > /dev/null 2>&1
then
# knot-dnsutils
DIG="kdig +noidn"
# out-of-tree json output support
if kdig +json > /dev/null 2>&1
then
DIG="${DIG} +json"
KDIG_JSON="true"
if ! command -v jq > /dev/null 2>&1
then
echo "'${HOOK}': need jq for knot-dnsutils with json output" >&2
exit 1
fi
fi
elif command -v dig > /dev/null 2>&1
then
# bind-dnsutils
DIG="dig +noidnout"
else
echo "'${HOOK}': need dig from bind-dnsutils or knot-dnsutils" >&2
exit 1
fi
# alternatives handling for nsupdate
if command -v knsupdate > /dev/null 2>&1
then
# knot-dnsutils
NSUPDATE="knsupdate"
elif command -v nsupdate > /dev/null 2>&1
then
# bind-dnsutils
NSUPDATE="nsupdate"
else
echo "'${HOOK}': need nsupdate from bind-dnsutils or knot-dnsutils" >&2
exit 1
fi
# config
for FILE in /etc/default/dehydrated-nsupdate /etc/default/dehydrated-nsupdate.d/*
do
if [ -e "${FILE}" ]
then
. "${FILE}"
fi
done
# find txt record to update
case "${KDIG_JSON}" in
true)
CNAME="$(${DIG} "_acme-challenge.${DOMAIN}" | jq -r -M '.answer | .[] | .rdata' | tail -n1)"
;;
*)
CNAME="$(${DIG} +nocomments +noquestion "_acme-challenge.${DOMAIN}" 2>&1 | grep -v '^;' | awk '/CNAME/ { print $5 }' | tail -n1)"
;;
esac
if [ -n "${CNAME}" ]
then
TXT_RECORD="${CNAME}"
else
TXT_RECORD="_acme-challenge.${DOMAIN}"
fi
# find nameservers to update
ZONE="${TXT_RECORD}"
while true
do
case "${KDIG_JSON}" in
true)
NAMESERVERS="$(${DIG} NS "${ZONE}" | jq -r -M '.answer | .[] | .rdata')"
;;
*)
NAMESERVERS="$(${DIG} +nocomments +noquestion NS "${ZONE}" 2>&1 | grep -v '^;' | awk '/NS/ { print $5 }')"
;;
esac
if [ -n "${NAMESERVERS}" ]
then
case "${KDIG_JSON}" in
true)
ZONE="$(${DIG} NS "${ZONE}" | jq -r -M '.answer | .[] | .rdata' | tail -n1)"
;;
*)
ZONE="$(${DIG} +nocomments +noquestion NS "${ZONE}" 2>&1 | grep -v '^;' | awk '/NS/ { print $1 }' | tail -n1)"
;;
esac
break
else
ZONE="$(echo "${ZONE}" | cut -d '.' -f 2-)"
fi
done
if [ -n "${TSIG_KEYFILE}" ] && [ -e "${TSIG_KEYFILE}" ]
then
NSUPDATE_OPTIONS="-k ${TSIG_KEYFILE}"
fi
# update nameservers
for NAMESERVER in ${NAMESERVERS}
do
echo -n " + sending '${HOOK_ACTION}' for ${TXT_RECORD} to ${NAMESERVER}..."
# shellcheck disable=SC2086
echo "server ${NAMESERVER}
zone ${ZONE}
ttl 0
update ${HOOK_ACTION} ${TXT_RECORD} 0 TXT ${TOKEN_VALUE}
send" | "${NSUPDATE}" ${NSUPDATE_OPTIONS}
echo " done."
done
|
