doesn't really belong in this repo but I don't want to make a new repo for just this dnssec key validation tool

DDNS.pm

@@ -2,20 +2,24 @@ package Martnet::DDNS;
 
 use strict;
 use warnings;
-use Net::DNS;
 use File::Temp qw/tempfile/;
 use Memoize;
 
 memoize('_gethosts');
 
-our $VERSION = '0.3';
+our $VERSION = '0.4';
+
+# our $misterdns = '198.251.79.234';
+our $misterdns = '5.78.68.64';
+our $defaultmaster = '5.78.68.64'; # could be v4 and v6 like '198.251.79.234;2607:f1c0:86e:b66f:6b86:babb:c367:b0dc'
+our $keyfile = '/etc/bind/zone-management.key';
 
 sub new {
     my $me = shift;
     my %opts = @_;
     
     return bless {
-	'keyfile' => '/etc/bind/Kprivate.invalid.+157+14348.key',
+	'keyfile' => $keyfile,
 	%opts
     }, $me;
 }
@@ -51,20 +55,26 @@ sub _lookupOrDie {
     _validateOrDie($dom);
     my $fqdn = _fqdn($dom, $type);
     
-    my $res   = Net::DNS::Resolver->new;
-    my $query = $res->query($fqdn, "TXT");
-
-    if ($query) {
-	foreach my $rr (grep { $_->type eq 'TXT' } $query->answer) {
-	    # We found a record; that's all that I care about.
-	    #print $rr->nsdname, "\n";
+    my $answer;
+    my $all = '';
+    my $fh;
+    open($fh, "dig +short -t txt \@${misterdns} $fqdn |")
+	|| die "Can't open dig: $!";
+    while (<$fh>) {
+	$all .= $_;
+	if ($_ =~ /^\"(.+)\"$/) {
+	    $answer = $1;
+	}
+    }
+    if ($answer) {
+	# We found a record; that's all I care about.
 	return 1;
     }
-    }
     else {
-	die "query failed: ", $res->errorstring, "\n";
+	die "query failed: $all\n";
     }
 
+    # Unreached
     die "Failed to find existing DNS record for $fqdn";
 }
 
@@ -99,7 +109,7 @@ sub _gethosts {
     }
 
     my $fh;
-    open($fh, "dig -t AXFR \@mister-dns.martnet.com private.invalid. |")
+    open($fh, "dig -t AXFR \@${misterdns} private.invalid. |")
 	|| die "Can't open dig: $!";
 
     my @vh;
@@ -202,5 +212,11 @@ sub is_dnssec {
     return 0;
 }
 
+sub default_master {
+    my ($this, $type) = @_;
+
+    # This could return different masters for different types
+    return $defaultmaster;
+}
 
 1;

Makefile.PL

@@ -3,8 +3,7 @@ use ExtUtils::MakeMaker;
 WriteMakefile(
     'NAME'         => 'Martnet::DDNS',
     'VERSION_FROM' => 'DDNS.pm',
-    'PREREQ_PM'    => { Net::DNS => 0.66,
-			File::Temp => 0.22,
+    'PREREQ_PM'    => { File::Temp => 0.22,
 			Regexp::Common => 2013031301,
     },
     'EXE_FILES'    => [ 'bin/add-vhost',

bin/add-custom

@@ -7,7 +7,8 @@ use Regexp::Common qw/net/;
 
 my $host = shift || die "No zonename provided";
 my $master = shift;
-$master ||= '198.251.79.234;2607:f1c0:86e:b66f:6b86:babb:c367:b0dc';
+my $ddns = Martnet::DDNS->new();
+$master ||= $ddns->default_master();
 
 die "Zonename must end in a dot"
     unless ($host =~ /^[a-zA-Z0-9\.\-\_]+\.$/);
@@ -16,5 +17,4 @@ my $regex = $RE{net}{IPv4} . '|' . $RE{net}{IPv6};
 die "Master must be an IPv4 or IPv6 address"
     unless ($master =~ /^$regex$/);
 
-my $ddns = Martnet::DDNS->new();
 $ddns->add($host, $master, '_custom');

bin/add-dnssec

@@ -7,8 +7,8 @@ use Regexp::Common qw/net/;
 
 my $host = shift || die "No zonename provided";
 my $master = shift;
-#$master ||= '198.251.79.234';
-$master ||= '198.251.79.234;2607:f1c0:86e:b66f:6b86:babb:c367:b0dc';
+my $ddns = Martnet::DDNS->new();
+$master ||= $ddns->default_master();
 
 
 die "Zonename must end in a dot"
@@ -18,5 +18,4 @@ my $regex = $RE{net}{IPv4} . '|' . $RE{net}{IPv6};
 die "Master must be an IPv4 or IPv6 address"
     unless ($master =~ /^$regex$/);
 
-my $ddns = Martnet::DDNS->new();
 $ddns->add($host, $master, '_dnssec');

bin/add-vhost

@@ -6,8 +6,8 @@ use Martnet::DDNS;
 use Regexp::Common qw/net/;
 
 my $host = shift || die "No vhost provided";
-#my $master = shift || die "No master DNS IP provided";
-my $master ||= '198.251.79.234;2607:f1c0:86e:b66f:6b86:babb:c367:b0dc';
+my $ddns = Martnet::DDNS->new();
+my $master ||= $ddns->default_master();
 
 die "Hostname must end in a dot"
     unless ($host =~ /^[a-zA-Z0-9\.\-\_]+\.$/);
@@ -16,5 +16,4 @@ my $regex = $RE{net}{IPv4} . '|' . $RE{net}{IPv6};
 die "Master must be an IPv4 or IPv6 address"
     unless ($master =~ /^$regex$/);
 
-my $ddns = Martnet::DDNS->new();
 $ddns->add($host, $master, '_vhosts');

bin/sync-slave

@@ -46,7 +46,7 @@ sub parse_slavefile {
     
     open(my $fh, $f) || die "Can't open $f: $!";
     while (<$fh>) {
-	if (/^zone\s+\"([^\"]+)\"\s+\{.+masters\s?\{\s?(.+);\s?\};\s?\};/) {
+	if (/^zone\s+\"([^\"]+)\"\s+\{.+masters\s?\{\s?([^\}]+);\s?\};/) {
 	    push ( @ret, { zone => $1,
 			   master => $2
 		   } );
@@ -63,11 +63,13 @@ sub do_rewrite {
     
     foreach my $i (sort {$a->{zone} cmp $b->{zone}} @vh) {
 	next if ($i->{type} eq '_dnssec');
-	print $fh "zone \"$i->{zone}\" { type slave; file \"/var/cache/bind/db.$i->{zone}\"; masters { $i->{master}; }; };\n";
+	print $fh "zone \"$i->{zone}\" { type slave; file \"/var/cache/bind/db.$i->{zone}\"; masters { $i->{master}; }; allow-notify {key \"notify-key\";}; };\n";
     }
     close $fh;
     print "Installing new slave host list\n";
-    system("install -o bind -g bind $path /etc/bind/martnet.slave.zones.9");
+    my $old_uid = (lstat "/etc/bind/martnet.slave.zones.9")[4];
+    my $old_gid = (lstat "/etc/bind/martnet.slave.zones.9")[5];
+    system("install -o $old_uid -g $old_gid $path /etc/bind/martnet.slave.zones.9");
     print "Reloading DNS files\n";
     system("/usr/sbin/rndc reload");
 }

dnssec-verify.sh

@@ -0,0 +1,140 @@
+#!/usr/bin/env bash
+# dnssec-verify.sh — emit exact DS lines to ADD/REMOVE in the *right place*.
+# If parent is a TLD (like com/org), suggest "registrar".
+# If parent is another zone (delegated child), suggest "parent zone '<parent>'".
+#
+# Compares parent DS vs child-derived DS (SHA-256) robustly and prints only real diffs.
+
+set -Eeuo pipefail
+
+if [[ $# -ne 1 ]]; then
+  echo "Usage: $0 <domain>" >&2; exit 2
+fi
+domain="${1%.}"
+
+need() { command -v "$1" >/dev/null 2>&1 || { echo "Missing $1" >&2; exit 3; }; }
+for t in dig dnssec-dsfromkey awk sed tr sort uniq grep; do need "$t"; done
+
+parent_of() {
+  local d="$1"
+  [[ "$d" == *.* ]] || { echo ""; return; }
+  echo "${d#*.}"
+}
+
+pick_ns_all() {
+  # Return up to 6 NS for a zone (one per line)
+  dig +short NS "$1" | awk 'NF' | head -n 6
+}
+
+normalize_parent_ds() {
+  # Normalize DS from full +answer or +short: "keytag alg 2 DIGEST"
+  awk -v dom="$domain." '
+    BEGIN { IGNORECASE=1 }
+    {
+      line = $0
+      gsub(/\(/,"",line); gsub(/\)/,"",line)
+      n = split(line, f, /[ \t]+/)
+      dsidx = 0
+      for (i=1; i<=n; i++) if (toupper(f[i])=="DS") { dsidx=i; break }
+      if (dsidx>0) {
+        kt=f[dsidx+1]; alg=f[dsidx+2]; dt=f[dsidx+3]
+        if (kt ~ /^[0-9]+$/ && alg ~ /^[0-9]+$/ && dt ~ /^[0-9]+$/) {
+          digest=""
+          for (j=dsidx+4; j<=n; j++) if (f[j] ~ /^[0-9A-Fa-f]+$/) digest=digest toupper(f[j])
+          if (dt=="2" && digest!="") printf "%s %s %s\n", kt, alg, digest
+        }
+      } else {
+        if (n>=4 && f[1] ~ /^[0-9]+$/ && f[2] ~ /^[0-9]+$/ && f[3] ~ /^[0-9]+$/) {
+          if (f[3]=="2") {
+            digest=""
+            for (k=4; k<=n; k++) if (f[k] ~ /^[0-9A-Fa-f]+$/) digest=digest toupper(f[k])
+            if (digest!="") printf "%s %s %s\n", f[1], f[2], digest
+          }
+        }
+      }
+    }'
+}
+
+normalize_child_ds() {
+  # Normalize dnssec-dsfromkey output: "keytag alg 2 DIGEST"
+  awk -v dom="$domain." '
+    BEGIN { IGNORECASE=1 }
+    toupper($3)=="DS" && $4 ~ /^[0-9]+$/ && $5 ~ /^[0-9]+$/ && $6 ~ /^[0-9]+$/ {
+      if ($6=="2") {
+        digest=""
+        for (i=7; i<=NF; i++) if ($i ~ /^[0-9A-Fa-f]+$/) digest=digest toupper($i)
+        if (digest!="") printf "%s %s %s\n", $4, $5, digest
+      }
+    }'
+}
+
+parent_zone="$(parent_of "$domain")"
+[[ -z "$parent_zone" || "$parent_zone" == "$domain" ]] && { echo "Cannot determine parent for $domain" >&2; exit 4; }
+
+# Where to publish DS?
+# - If parent has no additional dot (e.g., "org", "com"): registrar.
+# - Else: publish in the parent authoritative zone you control.
+if [[ "$parent_zone" == *.* ]]; then
+  where="parent zone '$parent_zone'"
+else
+  where="registrar (parent '$parent_zone')"
+fi
+
+# Parent NS set (authoritative for the parent zone)
+mapfile -t parent_ns_list < <(pick_ns_all "$parent_zone")
+((${#parent_ns_list[@]})) || { echo "No NS for parent zone $parent_zone" >&2; exit 5; }
+
+# Child NS (authoritative for the child)
+child_ns="$(dig +short NS "$domain" | awk 'NR==1{print}')"
+[[ -z "${child_ns:-}" ]] && child_ns="${parent_ns_list[0]}"
+
+# ----- Fetch and normalize parent DS (union across parent NS) -----
+parent_ds_tmp="$(mktemp)"; trap 'rm -f "$parent_ds_tmp"' EXIT; : >"$parent_ds_tmp"
+for ns in "${parent_ns_list[@]}"; do
+  dig @"$ns" +norec +dnssec +noall +answer "$domain" DS 2>/dev/null \
+    | normalize_parent_ds >> "$parent_ds_tmp" || true
+done
+mapfile -t parent_ds < <(sort -u "$parent_ds_tmp")
+
+# ----- Fetch child DNSKEY and derive DS (SHA-256) -----
+dnskey_ans="$(dig @"$child_ns" +tcp +dnssec +noall +answer "$domain" DNSKEY 2>/dev/null || true)"
+if [[ -z "$dnskey_ans" ]]; then
+  echo "Could not fetch DNSKEY from $child_ns for $domain" >&2
+  exit 6
+fi
+mapfile -t child_ds < <(
+  printf '%s\n' "$dnskey_ans" \
+  | dnssec-dsfromkey -f - -a SHA-256 "$domain" 2>/dev/null \
+  | normalize_child_ds \
+  | sort -u
+)
+
+# Build sets
+declare -A P C
+for r in "${parent_ds[@]:-}"; do [[ -n "${r// }" ]] && P["$r"]=1; done
+for r in "${child_ds[@]:-}"; do [[ -n "${r// }" ]] && C["$r"]=1; done
+
+adds=() removes=()
+
+# ADD = child-derived not present at parent
+for r in "${child_ds[@]:-}"; do [[ -z "${P[$r]+x}" ]] && adds+=("$r"); done
+# REMOVE = present at parent but not derivable from current child keys
+for r in "${parent_ds[@]:-}"; do [[ -z "${C[$r]+x}" ]] && removes+=("$r"); done
+
+emit_lines() {
+  local hdr="$1"; shift
+  local -a arr=( "$@" )
+  ((${#arr[@]})) || return 0
+  echo "## $hdr in $where:"
+  for r in "${arr[@]}"; do
+    set -- $r
+    echo "$domain. IN DS $1 $2 2 $3"
+  done
+}
+
+if ((${#adds[@]}==0 && ${#removes[@]}==0)); then
+  echo "## Parent DS already matches child KSKs (no changes) — in $where."
+else
+  emit_lines "ADD these DS" "${adds[@]}"
+  emit_lines "REMOVE these DS" "${removes[@]}"
+fi