Add reverse DNS zones for Equinix addresses in Dublin

[dns.git] / bin / mksshfp

diff --git a/bin/mksshfp b/bin/mksshfp
index e4bc8ed30c84f293c680e46daaba43bac18a3a8e..f3b6d1a904469b9d9d1224c352c895fa66de8960 100755 (executable)
--- a/bin/mksshfp
+++ b/bin/mksshfp
@@ -1,32 +1,63 @@
 #!/usr/bin/perl
 
+use strict;
+use warnings;
 
-open(SSHFP_JS, ">", "include/sshfp.js") || die $!;
+use Digest::SHA qw(sha256_hex);
+use MIME::Base64;
 
-print SSHFP_JS qq|var SSHFP_RECORDS = [\n|;
+my %hosts;
 
 if (-f "/etc/ssh/ssh_known_hosts")
 {
-    open(SSHFP, "-|","sshfp", "-k", "/etc/ssh/ssh_known_hosts") || die $!;
+    open(HOSTS, "<", "/etc/ssh/ssh_known_hosts") || die $!;
 
-    while (my $line = <SSHFP>)
+    while (my $line = <HOSTS>)
     {
-        if ($line =~ /^(\S+) IN SSHFP (\d+) (\d+) ([0-9A-F]+)$/)
+        last if $line =~ /^# Manually maintained records$/;
+
+        if ($line =~ /^([^, ]+)\S* (\S+) (\S+)$/)
         {
             my $host = $1;
             my $algorithm = $2;
-            my $type = $3;
-            my $value = $4;
+            my $value = uc(sha256_hex(decode_base64($3)));
+
+            $host =~ s/\.openstreetmap\.org$//;
 
-            print SSHFP_JS qq|  SSHFP("${host}", ${algorithm}, ${type}, "${value}"),\n|;
+            if ($algorithm ne "2")
+            {
+                $hosts{$host} ||= {};
+
+                $hosts{$host}->{$algorithm} = $value;
+            }
         }
-        else
+    }
+
+    close(HOSTS);
+}
+
+open(SSHFP_JS, ">", "include/sshfp.js") || die $!;
+
+print SSHFP_JS qq|var SSHFP_RECORDS = [\n|;
+
+foreach my $host (sort keys %hosts)
+{
+    if ($hosts{$host}->{"ecdsa-sha2-nistp256"} || $hosts{$host}->{"ssh-ed25519"})
+    {
+        if ($hosts{$host}->{"ecdsa-sha2-nistp256"})
         {
-            warn $line;
+            print SSHFP_JS sshfp_record($host, "3", $hosts{$host}->{"ecdsa-sha2-nistp256"});
         }
-    }
 
-    close(SSHFP);
+        if ($hosts{$host}->{"ssh-ed25519"})
+        {
+            print SSHFP_JS sshfp_record($host, "4", $hosts{$host}->{"ssh-ed25519"});
+        }
+    }
+    elsif ($hosts{$host}->{"ssh-rsa"})
+    {
+        print SSHFP_JS sshfp_record($host, "1", $hosts{$host}->{"ssh-rsa"});
+    }
 }
 
 print SSHFP_JS qq|];\n|;
@@ -34,3 +65,12 @@ print SSHFP_JS qq|];\n|;
 close(SSHFP_JS);
 
 exit 0;
+
+sub sshfp_record
+{
+    my $host = shift;
+    my $algorithm = shift;
+    my $value = shift;
+
+    return qq|  SSHFP("${host}", ${algorithm}, 2, "${value}"),\n|;
+}