Merge pull request #34 from ypid/master

Wrote script to copy only the needed files to the docker host which runs the docker openvpn server.

README.md

@@ -105,7 +105,7 @@ packets, etc).
   simplicity.  It's highly recommended to secure the CA key with some
   passphrase to protect against a filesystem compromise.  A more secure system
   would put the EasyRSA PKI CA on an offline system (can use the same Docker
-  image to accomplish this).
+  image and the script ovpn_copy_server_files to accomplish this).
 * It would be impossible for an adversary to sign bad or forged certificates
   without first cracking the key's passphase should the adversary have root
   access to the filesystem.

bin/ovpn_copy_server_files

@@ -0,0 +1,34 @@
+#!/bin/bash
+## @licence AGPLv3 <https://www.gnu.org/licenses/agpl-3.0.html>
+## @author Copyright (C) 2015 Robin Schneider <ypid@riseup.net>
+
+if [ -z "$OPENVPN" ]; then
+    export OPENVPN="$PWD"
+fi
+if ! source "$OPENVPN/ovpn_env.sh"; then
+    echo "Could not source $OPENVPN/ovpn_env.sh."
+    exit 1
+fi
+
+TARGET="/tmp/openvpn_${OVPN_CN}"
+if [ -n "$1" ]; then
+    TARGET="$1"
+else
+    TARGET="$OPENVPN/server"
+fi
+
+rsync --recursive --verbose --prune-empty-dirs \
+    --exclude="clients" \
+    --exclude="server" \
+    --include "*/" \
+    --include "/pki/private/${OVPN_CN}.key" \
+    --include "/pki/ca.crt" \
+    --include "/pki/issued/${OVPN_CN}.crt" \
+    --include "/pki/dh.pem" \
+    --include "ta.key" \
+    --include "/openvpn.conf" \
+    --include "/ovpn_env.sh" \
+    --exclude="*" \
+    "$OPENVPN/" "$TARGET"
+
+echo "Created the openvpn configuration for the server: $TARGET"

docs/paranoid.md

@@ -0,0 +1,11 @@
+# Advanced security
+
+As mentioned in the [backup section](/docs/backup.md), there are good reasons to not generate the CA and/or leave it a server. This document describes how you can generate the CA and all your certificates on a secure machine and then copy only the needed files (which never includes the CA root key obviously ;) ) to the server(s) and clients.
+
+Execute the following commands. Note that you might want to change the volume `/tmp/openvpn` to persistent storage or use a data docker container for this.
+
+    docker run --rm -t -i -v /tmp/openvpn:/etc/openvpn kylemanna/openvpn ovpn_genconfig -u udp://VPN.SERVERNAME.COM
+    docker run --rm -t -i -v /tmp/openvpn:/etc/openvpn kylemanna/openvpn ovpn_initpki
+    docker run --rm -t -i -v /tmp/openvpn:/etc/openvpn kylemanna/openvpn ovpn_copy_server_files
+
+The `ovpn_copy_server_files` script puts all the needed configuration in a subdirectory which defaults to `$OPENVPN/server`. All you need to do now is to copy this directory to the server and you are good to go.