From 92c136c904be9197783db936f54082355730d300 Mon Sep 17 00:00:00 2001
From: Tom Hughes <tom@compton.nu>
Date: Sat, 8 Feb 2020 16:02:02 +0000
Subject: [PATCH] Limit the number of SSHFP records we generate

---
 Makefile    | 2 +-
 bin/mksshfp | 6 +++++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 8a26dd0..7811651 100644
--- a/Makefile
+++ b/Makefile
@@ -66,7 +66,7 @@ data/switch2osm.org: src/switch2osm
 data/switch2osm.com: src/switch2osm
 data/stateofthemap.eu: src/stateofthemap-eu
 
-include/sshfp.js:
+include/sshfp.js: $(wildcard /etc/ssh/ssh_known_hosts)
 	bin/mksshfp
 
 origins/tile.openstreetmap.yml: bin/mkcountries lib/countries.xml bandwidth/tile.openstreetmap.yml
diff --git a/bin/mksshfp b/bin/mksshfp
index e4bc8ed..7c0f518 100755
--- a/bin/mksshfp
+++ b/bin/mksshfp
@@ -18,7 +18,11 @@ if (-f "/etc/ssh/ssh_known_hosts")
             my $type = $3;
             my $value = $4;
 
-            print SSHFP_JS qq|  SSHFP("${host}", ${algorithm}, ${type}, "${value}"),\n|;
+            if ($type == 2 &&
+                ($algorithm == 3 || $algorithm == 4))
+            {
+                print SSHFP_JS qq|  SSHFP("${host}", ${algorithm}, ${type}, "${value}"),\n|;
+            }
         }
         else
         {
-- 
2.39.5