Added make-ssh-known-hosts

1 files changed, 40 insertions, 0 deletions

diff --git a/bin/make-ssh-known-hosts b/bin/make-ssh-known-hosts
new file mode 100755
index 0000000..34901af
--- /dev/null
+++ b/bin/make-ssh-known-hosts
@@ -0,0 +1,40 @@
+#!/bin/sh
+# Given a list of host names as arguments, generate a known_hosts file
+# Copyright (C) 2013 Ryan Kavanagh <rak@debian.org>
+# All rights reserved.
+# 
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#  1. Redistributions of source code must retain the above copyright
+#     notice, this list of conditions and the following disclaimer.
+#  2. Redistributions in binary form must reproduce the above copyright
+#     notice, this list of conditions and the following disclaimer in the
+#     documentation and/or other materials provided with the distribution.
+#  3. The name of the author may not be used to endorse or promote products
+#     derived from this software without specific prior written permission.
+# 
+# THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+# INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+# AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
+# THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+for i in "$@"; do
+    IP4=$(host -t A "$i" | awk '{ print "," $NF }');
+    IP6=$(host -t AAAA "$i" | awk '{ print "," $NF }');
+    if test "${IP4}" = ",record"; then
+        IP4="";
+    fi
+    if test "${IP6}" = ",record"; then
+        IP6="";
+    fi
+    HOST=$(echo "${i}${IP4}${IP6}" | sed -e 's/ //g');
+    KEYS=$(ssh -q "$i" cat /etc/ssh/ssh_host_rsa_key.pub /etc/ssh/ssh_host_ecdsa_key.pub);
+    echo "${KEYS}" | sed -e 's/^/'"${HOST}"' /g';
+done