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#!/usr/bin/env perl
# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
#
# SPDX-License-Identifier: MPL-2.0
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, you can obtain one at https://mozilla.org/MPL/2.0/.
#
# See the COPYRIGHT file distributed with this work for additional
# information regarding copyright ownership.
use strict;
use warnings;
sub process_changeset;
my @changeset;
while( my $line = <> ) {
chomp $line;
if( $line =~ /^(?<op>add|del) (?<label>\S+)\s+(?<ttl>\d+)\s+IN\s+(?<rrtype>\S+)\s+(?<rdata>.*)/ ) {
my $change = {
op => $+{op},
label => $+{label},
ttl => $+{ttl},
rrtype => $+{rrtype},
rdata => $+{rdata},
};
if( $change->{op} eq 'del' and $change->{rrtype} eq 'SOA' ) {
if( @changeset ) {
process_changeset( @changeset );
@changeset = ();
}
}
push @changeset, $change;
}
else {
die "error parsing journal data";
}
}
if( @changeset ) {
process_changeset( @changeset );
}
{
my %rrsig_db;
my %keys;
my $apex;
sub process_changeset {
my @changeset = @_;
if( not $apex ) {
# the first record of the first changeset is guaranteed to be the apex
$apex = $changeset[0]{label};
}
my $newserial;
my %touched_rrsigs;
my %touched_keys;
foreach my $change( @changeset ) {
if( $change->{rrtype} eq 'SOA' ) {
if( $change->{op} eq 'add' ) {
if( $change->{rdata} !~ /^\S+ \S+ (?<serial>\d+)/ ) {
die "unable to parse SOA";
}
$newserial = $+{serial};
}
}
elsif( $change->{rrtype} eq 'NSEC' ) {
; # do nothing
}
elsif( $change->{rrtype} eq 'DNSKEY' ) {
; # ignore for now
}
elsif( $change->{rrtype} eq 'TYPE65534' and $change->{label} eq $apex ) {
# key status
if( $change->{rdata} !~ /^\\# (?<datasize>\d+) (?<data>[0-9A-F]+)$/ ) {
die "unable to parse key status record";
}
my $datasize = $+{datasize};
my $data = $+{data};
if( $datasize == 5 ) {
my( $alg, $id, $flag_del, $flag_done ) = unpack 'CnCC', pack( 'H10', $data );
if( $change->{op} eq 'add' ) {
if( not exists $keys{$id} ) {
$touched_keys{$id} //= 1;
$keys{$id} = {
$data => 1,
rrs => 1,
done_signing => $flag_done,
deleting => $flag_del,
};
}
else {
if( not exists $keys{$id}{$data} ) {
my $keydata = $keys{$id};
$touched_keys{$id} = { %$keydata };
$keydata->{rrs}++;
$keydata->{$data} = 1;
$keydata->{done_signing} += $flag_done;
$keydata->{deleting} += $flag_del;
}
}
}
else {
# this logic relies upon the convention that there won't
# ever be multiple records with the same flag set
if( exists $keys{$id} ) {
my $keydata = $keys{$id};
if( exists $keydata->{$data} ) {
$touched_keys{$id} = { %$keydata };
$keydata->{rrs}--;
delete $keydata->{$data};
$keydata->{done_signing} -= $flag_done;
$keydata->{deleting} -= $flag_del;
if( $keydata->{rrs} == 0 ) {
delete $keys{$id};
}
}
}
}
}
else {
die "unexpected key status record content";
}
}
elsif( $change->{rrtype} eq 'RRSIG' ) {
if( $change->{rdata} !~ /^(?<covers>\S+) \d+ \d+ \d+ (?<validity_end>\d+) (?<validity_start>\d+) (?<signing_key>\d+)/ ) {
die "unable to parse RRSIG rdata";
}
$change->{covers} = $+{covers};
$change->{validity_end} = $+{validity_end};
$change->{validity_start} = $+{validity_start};
$change->{signing_key} = $+{signing_key};
my $db_key = $change->{label} . ':' . $change->{covers};
$rrsig_db{$db_key} //= {};
$touched_rrsigs{$db_key} = 1;
if( $change->{op} eq 'add' ) {
$rrsig_db{$db_key}{ $change->{signing_key} } = 1;
}
else {
# del
delete $rrsig_db{$db_key}{ $change->{signing_key} };
}
}
}
foreach my $key_id( sort keys %touched_keys ) {
my $old_data;
my $new_data;
if( ref $touched_keys{$key_id} ) {
$old_data = $touched_keys{$key_id};
}
if( exists $keys{$key_id} ) {
$new_data = $keys{$key_id};
}
if( $old_data ) {
if( $new_data ) {
print "at serial $newserial key $key_id status changed from ($old_data->{deleting},$old_data->{done_signing}) to ($new_data->{deleting},$new_data->{done_signing})\n";
}
else {
print "at serial $newserial key $key_id status removed from zone\n";
}
}
else {
print "at serial $newserial key $key_id status added with flags ($new_data->{deleting},$new_data->{done_signing})\n";
}
}
foreach my $rrsig_id( sort keys %touched_rrsigs ) {
my $n_signing_keys = keys %{ $rrsig_db{$rrsig_id} };
if( $n_signing_keys == 0 ) {
print "at serial $newserial $rrsig_id went unsigned\n";
}
elsif( $rrsig_id =~ /:DNSKEY$/ ) {
if( $n_signing_keys != 2 ) {
print "at serial $newserial $rrsig_id was signed $n_signing_keys time(s) when it should have been signed twice\n";
}
}
elsif( $n_signing_keys > 1 ) {
my @signing_keys = sort { $a <=> $b } keys %{ $rrsig_db{$rrsig_id} };
print "at serial $newserial $rrsig_id was signed too many times, keys (@signing_keys)\n";
}
}
}
}
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