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[tools.git] / nagios / check_zone_signature
1 #!/bin/bash
2
3 # Fetches the zone from the nameserver via AXFR and feeds it to bind's
4 # dnssec-verify to see of things are sane.
5
6 # Copyright 2016 Peter Palfrader
7 # Copyright 2016 Andreas Bilke
8 #
9 # Permission is hereby granted, free of charge, to any person obtaining
10 # a copy of this software and associated documentation files (the
11 # "Software"), to deal in the Software without restriction, including
12 # without limitation the rights to use, copy, modify, merge, publish,
13 # distribute, sublicense, and/or sell copies of the Software, and to
14 # permit persons to whom the Software is furnished to do so, subject to
15 # the following conditions:
16 #
17 # The above copyright notice and this permission notice shall be
18 # included in all copies or substantial portions of the Software.
19 #
20 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24 # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25 # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27
28 set -e
29 set -u
30 set -f
31
32 if [ $# -ne 1 ]; then
33 echo "usage: $0 <ZONE>" >&2
34 exit 3
35 fi
36
37 ZONE="$1"
38
39 MASTER=$(hostname -f)
40 EXTRA="-b ::1"
41
42 tmp=$(mktemp)
43 trap "rm -f '$tmp'" EXIT
44
45 err=0
46 errmsg=""
47
48 if ! dig $EXTRA -t axfr "$ZONE" @$MASTER | /usr/sbin/dnssec-verify -o "$ZONE" /dev/stdin > "$tmp" 2>&1; then
49 err=2
50 errmsg="$ZONE"
51 fi
52
53 if [ "$err" = 0 ]; then
54 echo "OK: $ZONE appear to be OK."
55 else
56 echo "CRITICAL: $errmsg"
57 cat "$tmp"
58 fi
59 exit "$err"