From 9756c9a392179f4b3c1f7732c1c448d116c67a9c Mon Sep 17 00:00:00 2001
From: Bob Lantz <rlantz@cs.stanford.edu>
Date: Fri, 22 Jan 2016 15:53:52 -0800
Subject: [PATCH] vm_clean: delete keys from from /etc/ssh/ before shipping vm

It's a bad idea for all Mininet VMs to share the same SSH keys.
Certainly users can regenerate their own keys, but it's better
if we don't ship a key and simply regenerate it on boot.
---
 util/install.sh               | 14 ++++++++++++++
 util/vm/install-mininet-vm.sh |  2 +-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/util/install.sh b/util/install.sh
index 958d49b..8d6d203 100755
--- a/util/install.sh
+++ b/util/install.sh
@@ -706,6 +706,20 @@ function vm_clean {
     rm -f ~/.ssh/id_rsa* ~/.ssh/known_hosts
     sudo rm -f ~/.ssh/authorized_keys*
 
+    # Remove SSH keys and regenerate on boot
+    echo 'Removing SSH keys from /etc/ssh/'
+    sudo rm -f /etc/ssh/*key*
+    if ! grep mininet /etc/rc.local >& /dev/null; then
+        sudo sed -i -e "s/exit 0//" /etc/rc.local
+        echo '
+# mininet: regenerate ssh keys if we deleted them
+if ! stat -t /etc/ssh/*key* >/dev/null 2>&1; then
+    /usr/sbin/dpkg-reconfigure openssh-server
+fi
+exit 0
+' | sudo tee -a /etc/rc.local > /dev/null
+    fi
+
     # Remove Mininet files
     #sudo rm -f /lib/modules/python2.5/site-packages/mininet*
     #sudo rm -f /usr/bin/mnexec
diff --git a/util/vm/install-mininet-vm.sh b/util/vm/install-mininet-vm.sh
index e26ba41..11632ca 100755
--- a/util/vm/install-mininet-vm.sh
+++ b/util/vm/install-mininet-vm.sh
@@ -43,7 +43,7 @@ fi
 # Install Mininet
 time mininet/util/install.sh
 # Finalize VM
-time mininet/util/install.sh -tc
+time mininet/util/install.sh -tcd
 # Ignoring this since NOX classic is deprecated
 #if ! grep NOX_CORE_DIR .bashrc; then
 #  echo "export NOX_CORE_DIR=~/noxcore/build/src/" >> .bashrc