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Test jitter distribution

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Test jitter distribution in NSEC3 dynamic zone and for a zone that has old
signatures.  In both cases the generated signatures should be spread nicely.
This commit is contained in:
Matthijs Mekking
2019-10-09 18:09:27 +02:00
parent 6b2fd40269
commit 540b90fd6c
5 changed files with 129 additions and 1 deletions
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76
bin/tests/system/autosign/tests.sh
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@@ -50,6 +50,43 @@ checkprivate () {
return 1
}
# Check the signatures expiration times. First check how many signatures
# there are in total ($rrsigs). Then see what the distribution of signature
# expiration times is ($expiretimes). Ignore the time part for a better
# modelled distribution.
checkjitter () {
_file=$1
_ret=0
cat $_file | awk '$4 == "RRSIG" {print substr($9,1,8)}' | sort | uniq -c | cat_i
_rrsigs=$(cat $_file | awk '$4 == "RRSIG" {print $4}' | cat_i | wc -l)
_expiretimes=$(cat $_file | awk '$4 == "RRSIG" {print substr($9,1,8)}' | sort | uniq -c | awk '{print $1}')
_count=0
_total=0
for _num in $_expiretimes
do
_total=$(($_total + $_num))
done
# Make sure the total number of numbers matches the number of RRSIGs.
test $_total -eq $_rrsigs || _ret=1
# Calculate mean: The number of signatures divided over 8 days.
_mean=$(($_total / 8))
# We expect the number of signatures not to exceed twice the mean.
_limit=$(($_mean * 2))
# Add an additional margin.
_limit=$(($_limit + 10))
# Find outliers.
for _num in $_expiretimes
do
if [ $_num -gt $_limit ]; then
echo_i "error: too many RRSIG records ($_num) with the same expiration time"
_ret=1
fi
done
return $_ret
}
#
# The NSEC record at the apex of the zone and its RRSIG records are
# added as part of the last step in signing a zone. We wait for the
@@ -334,6 +371,15 @@ do
sleep 1
done
n=`expr $n + 1`
if [ $ret != 0 ]; then echo_i "failed"; fi
status=`expr $status + $ret`
# Check jitter distribution.
echo_i "checking expired signatures were jittered correctly ($n)"
ret=0
$DIG $DIGOPTS axfr oldsigs.example @10.53.0.3 > dig.out.ns3.test$n || ret=1
checkjitter dig.out.ns3.test$n || ret=1
n=`expr $n + 1`
if [ $ret != 0 ]; then echo_i "failed"; fi
status=`expr $status + $ret`
echo_i "checking NSEC->NSEC3 conversion succeeded ($n)"
@@ -938,6 +984,36 @@ n=`expr $n + 1`
if [ $ret != 0 ]; then echo_i "failed"; fi
status=`expr $status + $ret`
echo_i "checking jitter in a newly signed NSEC3 zone ($n)"
ret=0
# Use DNS UPDATE to add an NSEC3PARAM record into the zone.
$NSUPDATE > nsupdate.out.test$n 2>&1 <<END || ret=1
server 10.53.0.3 ${PORT}
zone jitter.nsec3.example.
update add jitter.nsec3.example. 3600 NSEC3PARAM 1 0 10 BEEF
send
END
[ $ret != 0 ] && echo_i "error: dynamic update add NSEC3PARAM failed"
# Create DNSSEC keys in the zone directory.
$KEYGEN -a rsasha1 -3 -q -K ns3 jitter.nsec3.example > /dev/null
# Trigger zone signing.
$RNDCCMD 10.53.0.3 sign jitter.nsec3.example. 2>&1 | sed 's/^/ns3 /' | cat_i
# Wait until zone has been signed.
for i in 0 1 2 3 4 5 6 7 8 9; do
failed=0
$DIG $DIGOPTS axfr jitter.nsec3.example @10.53.0.3 > dig.out.ns3.test$n || failed=1
grep "NSEC3PARAM" dig.out.ns3.test$n > /dev/null || failed=1
[ $failed -eq 0 ] && break
echo_i "waiting ... ($i)"
sleep 2
done
[ $failed != 0 ] && echo_i "error: no NSEC3PARAM found in AXFR" && ret=1
# Check jitter distribution.
checkjitter dig.out.ns3.test$n || ret=1
n=`expr $n + 1`
if [ $ret != 0 ]; then echo_i "failed"; fi
status=`expr $status + $ret`
echo_i "checking that serial number and RRSIGs are both updated (rt21045) ($n)"
ret=0
oldserial=`$DIG $DIGOPTS +short soa prepub.example @10.53.0.3 | awk '$0 !~ /SOA/ {print $3}'`