Merge remote-tracking branch 'upstream/master'
Dean Troyer
13 years ago
commit
73778e5224
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PassLib
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#!/bin/bash
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# install_openvpn.sh - Install OpenVPN and generate required certificates
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#
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# install_openvpn.sh --client name
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# install_openvpn.sh --server [name]
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#
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# name is used on the CN of the generated cert, and the filename of
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# the configuration, certificate and key files.
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#
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# --server mode configures the host with a running OpenVPN server instance
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# --client mode creates a tarball of a client configuration for this server
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# VPN Config
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VPN_SERVER=${VPN_SERVER:-`ifconfig eth0 | awk "/inet addr:/ { print \$2 }" | cut -d: -f2`} # 50.56.12.212
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VPN_PROTO=${VPN_PROTO:-tcp}
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VPN_PORT=${VPN_PORT:-6081}
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VPN_DEV=${VPN_DEV:-tun}
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VPN_CLIENT_NET=${VPN_CLIENT_NET:-172.16.28.0}
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VPN_CLIENT_MASK=${VPN_CLIENT_MASK:-255.255.255.0}
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VPN_LOCAL_NET=${VPN_LOCAL_NET:-10.0.0.0}
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VPN_LOCAL_MASK=${VPN_LOCAL_MASK:-255.255.0.0}
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VPN_DIR=/etc/openvpn
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CA_DIR=/etc/openvpn/easy-rsa
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usage() {
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echo "$0 - OpenVPN install and certificate generation"
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echo ""
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echo "$0 --client name"
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echo "$0 --server [name]"
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echo ""
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echo " --server mode configures the host with a running OpenVPN server instance"
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echo " --client mode creates a tarball of a client configuration for this server"
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exit 1
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}
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if [ -z $1 ]; then
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usage
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fi
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# Install OpenVPN
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if [ ! -x `which openvpn` ]; then
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apt-get install -y openvpn bridge-utils
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fi
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if [ ! -d $CA_DIR ]; then
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cp -pR /usr/share/doc/openvpn/examples/easy-rsa/2.0/ $CA_DIR
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fi
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OPWD=`pwd`
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cd $CA_DIR
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source ./vars
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# Override the defaults
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export KEY_COUNTRY="US"
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export KEY_PROVINCE="TX"
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export KEY_CITY="SanAntonio"
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export KEY_ORG="Cloudbuilders"
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export KEY_EMAIL="rcb@lists.rackspace.com"
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if [ ! -r $CA_DIR/keys/dh1024.pem ]; then
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# Initialize a new CA
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$CA_DIR/clean-all
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$CA_DIR/build-dh
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$CA_DIR/pkitool --initca
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openvpn --genkey --secret $CA_DIR/keys/ta.key ## Build a TLS key
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fi
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do_server() {
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NAME=$1
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# Generate server certificate
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$CA_DIR/pkitool --server $NAME
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(cd $CA_DIR/keys;
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cp $NAME.crt $NAME.key ca.crt dh1024.pem ta.key $VPN_DIR
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)
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cat >$VPN_DIR/$NAME.conf <<EOF
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proto $VPN_PROTO
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port $VPN_PORT
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dev $VPN_DEV
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cert $NAME.crt
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key $NAME.key # This file should be kept secret
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ca ca.crt
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dh dh1024.pem
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duplicate-cn
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server $VPN_CLIENT_NET $VPN_CLIENT_MASK
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ifconfig-pool-persist ipp.txt
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push "route $VPN_LOCAL_NET $VPN_LOCAL_MASK"
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comp-lzo
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user nobody
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group nobody
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persist-key
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persist-tun
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status openvpn-status.log
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EOF
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/etc/init.d/openvpn restart
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}
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do_client() {
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NAME=$1
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# Generate a client certificate
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$CA_DIR/pkitool $NAME
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TMP_DIR=`mktemp -d`
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(cd $CA_DIR/keys;
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cp -p ca.crt ta.key $NAME.key $NAME.crt $TMP_DIR
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)
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if [ -r $VPN_DIR/hostname ]; then
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HOST=`cat $VPN_DIR/hostname`
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else
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HOST=`hostname`
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fi
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cat >$TMP_DIR/$HOST.conf <<EOF
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proto $VPN_PROTO
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port $VPN_PORT
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dev $VPN_DEV
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cert $NAME.crt
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key $NAME.key # This file should be kept secret
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ca ca.crt
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client
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remote $VPN_SERVER $VPN_PORT
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resolv-retry infinite
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nobind
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user nobody
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group nobody
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persist-key
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persist-tun
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comp-lzo
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verb 3
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EOF
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(cd $TMP_DIR; tar cf $OPWD/$NAME.tar *)
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rm -rf $TMP_DIR
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echo "Client certificate and configuration is in $OPWD/$NAME.tar"
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}
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# Process command line args
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case $1 in
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--client) if [ -z $2 ]; then
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usage
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fi
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do_client $2
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;;
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--server) if [ -z $2 ]; then
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NAME=`hostname`
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else
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NAME=$2
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# Save for --client use
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echo $NAME >$VPN_DIR/hostname
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fi
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do_server $NAME
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;;
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--clean) $CA_DIR/clean-all
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;;
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*) usage
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esac
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