feat: Initial checkin
This commit is contained in:
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a87537547b
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ARG ALPINE_VERSION=3.15
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FROM alpine:${ALPINE_VERSION}
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LABEL zero-downtime.net.image.maintainer="stefan@zero-downtime.net" \
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zero-downtime.net.image.license="AGPLv3"
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RUN apk upgrade -U --available --no-cache && \
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apk add --no-cache \
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openvpn \
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nftables \
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bash \
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easy-rsa \
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openvpn-auth-pam \
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google-authenticator \
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libqrencode && \
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ln -s /usr/share/easy-rsa/easyrsa /usr/local/bin
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# Needed by scripts
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ENV OPENVPN=/etc/openvpn
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ENV EASYRSA=/usr/share/easy-rsa \
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EASYRSA_CRL_DAYS=3650 \
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EASYRSA_PKI=$OPENVPN/pki
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VOLUME ["/etc/openvpn"]
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EXPOSE 1194/udp
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CMD ["ovpn_run"]
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ADD ./bin /usr/local/bin
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RUN chmod a+x /usr/local/bin/*
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# Add support for OTP authentication using a PAM module
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ADD ./otp/openvpn /etc/pam.d/
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REGISTRY := public.ecr.aws/zero-downtime
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IMAGE := zdt-openvpn
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REGION := us-east-1
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include .ci/podman.mk
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@ -1,3 +1,8 @@
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# zdt-openvpn
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OpenVPN container incl. easy-rsa, TOTP, prometheus exporter
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OpenVPN container incl. easy-rsa, TOTP, prometheus exporter
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## Credits:
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- https://amilstead.com/blog/openvpn-with-google-authenticator-totp/#example-client-config-generator
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- https://github.com/seb-daehne/docker-openvpn.git
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- GitHub @ [kylemanna/docker-openvpn](https://github.com/kylemanna/docker-openvpn)
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#!/bin/bash
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## @licence MIT <http://opensource.org/licenses/MIT>
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## @author Copyright (C) 2015 Robin Schneider <ypid@riseup.net>
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set -e
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if [ -z "$OPENVPN" ]; then
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export OPENVPN="$PWD"
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fi
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if ! source "$OPENVPN/ovpn_env.sh"; then
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echo "Could not source $OPENVPN/ovpn_env.sh."
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exit 1
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fi
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TARGET="$OPENVPN/server"
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if [ -n "$1" ]; then
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TARGET="$1"
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fi
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mkdir -p "${TARGET}"
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## Ensure that no other keys then the one for the server is present.
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rm -rf "$TARGET/pki/private" "$TARGET/pki/issued"
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FILES=(
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"openvpn.conf"
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"ovpn_env.sh"
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"pki/private/${OVPN_CN}.key"
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"pki/issued/${OVPN_CN}.crt"
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"pki/dh.pem"
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"pki/ta.key"
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"pki/ca.crt"
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"ccd"
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)
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if [ -f "${OPENVPN}/pki/crl.pem" ]; then
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FILES+=("pki/crl.pem")
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fi
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# Ensure the ccd directory exists, even if empty
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mkdir -p "ccd"
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# rsync isn't available to keep size down
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# cp --parents isn't in busybox version
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# hack the directory structure with tar
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tar cf - -C "${OPENVPN}" "${FILES[@]}" | tar xvf - -C "${TARGET}"
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echo "Created the openvpn configuration for the server: $TARGET"
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#!/bin/bash
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#
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# Generate OpenVPN configs
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#
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TMP_PUSH_CONFIGFILE=$(mktemp -t vpn_push.XXXXXXX)
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TMP_ROUTE_CONFIGFILE=$(mktemp -t vpn_route.XXXXXXX)
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TMP_EXTRA_CONFIGFILE=$(mktemp -t vpn_extra.XXXXXXX)
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#Traceback on Error and Exit come from https://docwhat.org/tracebacks-in-bash/
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set -eu
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_showed_traceback=f
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traceback() {
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# Hide the traceback() call.
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local -i start=$(( ${1:-0} + 1 ))
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local -i end=${#BASH_SOURCE[@]}
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local -i i=0
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local -i j=0
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echo "Traceback (last called is first):" 1>&2
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for ((i=${start}; i < ${end}; i++)); do
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j=$(( $i - 1 ))
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local function="${FUNCNAME[$i]}"
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local file="${BASH_SOURCE[$i]}"
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local line="${BASH_LINENO[$j]}"
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echo " ${function}() in ${file}:${line}" 1>&2
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done
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}
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on_error() {
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local _ec="$?"
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local _cmd="${BASH_COMMAND:-unknown}"
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traceback 1
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_showed_traceback=t
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echo "The command ${_cmd} exited with exit code ${_ec}." 1>&2
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}
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trap on_error ERR
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on_exit() {
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echo "Cleaning up before Exit ..."
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rm -f $TMP_PUSH_CONFIGFILE
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rm -f $TMP_ROUTE_CONFIGFILE
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rm -f $TMP_EXTRA_CONFIGFILE
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local _ec="$?"
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if [[ $_ec != 0 && "${_showed_traceback}" != t ]]; then
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traceback 1
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fi
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}
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trap on_exit EXIT
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# Convert 1.2.3.4/24 -> 255.255.255.0
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cidr2mask()
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{
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local i
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local subnetmask=""
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local cidr=${1#*/}
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local full_octets=$(($cidr/8))
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local partial_octet=$(($cidr%8))
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for ((i=0;i<4;i+=1)); do
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if [ $i -lt $full_octets ]; then
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subnetmask+=255
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elif [ $i -eq $full_octets ]; then
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subnetmask+=$((256 - 2**(8-$partial_octet)))
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else
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subnetmask+=0
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fi
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[ $i -lt 3 ] && subnetmask+=.
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done
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echo $subnetmask
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}
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# Used often enough to justify a function
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getroute() {
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echo ${1%/*} $(cidr2mask $1)
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}
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usage() {
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echo "usage: $0 [-d]"
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echo " -u SERVER_PUBLIC_URL"
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echo " [-e EXTRA_SERVER_CONFIG ]"
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echo " [-E EXTRA_CLIENT_CONFIG ]"
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echo " [-f FRAGMENT ]"
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echo " [-n DNS_SERVER ...]"
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echo " [-p PUSH ...]"
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echo " [-r ROUTE ...]"
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echo " [-s SERVER_SUBNET]"
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echo
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echo "optional arguments:"
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echo " -2 Enable two factor authentication using Google Authenticator."
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echo " -a Authenticate packets with HMAC using the given message digest algorithm (auth)."
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echo " -b Disable 'push block-outside-dns'"
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echo " -c Enable client-to-client option"
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echo " -C A list of allowable TLS ciphers delimited by a colon (cipher)."
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echo " -d Disable default route"
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echo " -D Do not push dns servers"
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echo " -k Set keepalive. Default: '10 60'"
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echo " -m Set client MTU"
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echo " -N Configure NAT to access external server network"
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echo " -t Use TAP device (instead of TUN device)"
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echo " -T Encrypt packets with the given cipher algorithm instead of the default one (tls-cipher)."
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echo " -z Enable comp-lzo compression."
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}
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process_route_config() {
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local ovpn_route_config=''
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ovpn_route_config="$1"
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# If user passed "0" skip this, assume no extra routes
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[[ "$ovpn_route_config" == "0" ]] && break;
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echo "Processing Route Config: '${ovpn_route_config}'"
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[[ -n "$ovpn_route_config" ]] && echo "route $(getroute $ovpn_route_config)" >> "$TMP_ROUTE_CONFIGFILE"
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}
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process_push_config() {
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local ovpn_push_config=''
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ovpn_push_config="$1"
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echo "Processing PUSH Config: '${ovpn_push_config}'"
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[[ -n "$ovpn_push_config" ]] && echo "push \"$ovpn_push_config\"" >> "$TMP_PUSH_CONFIGFILE"
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}
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process_extra_config() {
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local ovpn_extra_config=''
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ovpn_extra_config="$1"
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echo "Processing Extra Config: '${ovpn_extra_config}'"
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[[ -n "$ovpn_extra_config" ]] && echo "$ovpn_extra_config" >> "$TMP_EXTRA_CONFIGFILE"
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}
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if [ "${DEBUG:-}" == "1" ]; then
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set -x
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fi
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set -e
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if [ -z "${OPENVPN:-}" ]; then
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export OPENVPN="$PWD"
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fi
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if [ -z "${EASYRSA_PKI:-}" ]; then
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export EASYRSA_PKI="$OPENVPN/pki"
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fi
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OVPN_AUTH=''
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OVPN_CIPHER=''
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OVPN_CLIENT_TO_CLIENT=''
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OVPN_CN=''
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OVPN_COMP_LZO=0
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OVPN_DEFROUTE=1
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OVPN_DEVICE="tun"
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OVPN_DEVICEN=0
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OVPN_DISABLE_PUSH_BLOCK_DNS=0
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OVPN_DNS=1
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OVPN_DNS_SERVERS=()
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OVPN_ENV=${OPENVPN}/ovpn_env.sh
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OVPN_EXTRA_CLIENT_CONFIG=()
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OVPN_EXTRA_SERVER_CONFIG=()
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OVPN_FRAGMENT=''
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OVPN_KEEPALIVE="10 60"
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OVPN_MTU=''
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OVPN_NAT=0
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OVPN_PORT=''
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OVPN_PROTO=''
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OVPN_PUSH=()
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OVPN_ROUTES=()
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OVPN_SERVER=192.168.255.0/24
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OVPN_SERVER_URL=''
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OVPN_TLS_CIPHER=''
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# Import existing configuration if present
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[ -r "$OVPN_ENV" ] && source "$OVPN_ENV"
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# Parse arguments
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while getopts ":a:e:E:C:T:r:s:du:bcp:n:k:DNm:f:tz2" opt; do
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case $opt in
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a)
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OVPN_AUTH="$OPTARG"
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;;
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e)
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mapfile -t TMP_EXTRA_SERVER_CONFIG <<< "$OPTARG"
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for i in "${TMP_EXTRA_SERVER_CONFIG[@]}"; do
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OVPN_EXTRA_SERVER_CONFIG+=("$i")
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done
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;;
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E)
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mapfile -t TMP_EXTRA_CLIENT_CONFIG <<< "$OPTARG"
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for i in "${TMP_EXTRA_CLIENT_CONFIG[@]}"; do
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OVPN_EXTRA_CLIENT_CONFIG+=("$i")
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done
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;;
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C)
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OVPN_CIPHER="$OPTARG"
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;;
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T)
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OVPN_TLS_CIPHER="$OPTARG"
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;;
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r)
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mapfile -t TMP_ROUTES <<< "$OPTARG"
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for i in "${TMP_ROUTES[@]}"; do
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OVPN_ROUTES+=("$i")
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done
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;;
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s)
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OVPN_SERVER="$OPTARG"
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;;
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d)
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OVPN_DEFROUTE=0
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OVPN_DISABLE_PUSH_BLOCK_DNS=1
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;;
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u)
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OVPN_SERVER_URL="$OPTARG"
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;;
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b)
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OVPN_DISABLE_PUSH_BLOCK_DNS=1
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;;
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c)
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OVPN_CLIENT_TO_CLIENT=1
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;;
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p)
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mapfile -t TMP_PUSH <<< "$OPTARG"
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for i in "${TMP_PUSH[@]}"; do
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OVPN_PUSH+=("$i")
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done
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;;
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n)
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mapfile -t TMP_DNS_SERVERS <<< "$OPTARG"
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for i in "${TMP_DNS_SERVERS[@]}"; do
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OVPN_DNS_SERVERS+=("$i")
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done
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;;
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D)
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OVPN_DNS=0
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;;
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N)
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OVPN_NAT=1
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;;
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k)
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OVPN_KEEPALIVE="$OPTARG"
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;;
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m)
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OVPN_MTU="$OPTARG"
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;;
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t)
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OVPN_DEVICE="tap"
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;;
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z)
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OVPN_COMP_LZO=1
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;;
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2)
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OVPN_OTP_AUTH=1
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;;
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f)
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OVPN_FRAGMENT="$OPTARG"
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;;
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\?)
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set +x
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echo "Invalid option: -$OPTARG" >&2
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usage
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exit 1
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;;
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:)
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set +x
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echo "Option -$OPTARG requires an argument." >&2
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usage
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exit 1
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;;
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esac
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done
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# Create ccd directory for static routes
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[ ! -d "${OPENVPN:-}/ccd" ] && mkdir -p ${OPENVPN:-}/ccd
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# Server name is in the form "udp://vpn.example.com:1194"
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if [[ "${OVPN_SERVER_URL:-}" =~ ^((udp|tcp|udp6|tcp6)://)?([0-9a-zA-Z\.\-]+)(:([0-9]+))?$ ]]; then
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OVPN_PROTO=${BASH_REMATCH[2]};
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OVPN_CN=${BASH_REMATCH[3]};
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OVPN_PORT=${BASH_REMATCH[5]};
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else
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set +x
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echo "Common name not specified, see '-u'"
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usage
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exit 1
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fi
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# Apply defaults. If dns servers were not defined with -n, use google nameservers
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set +u
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[ -z "$OVPN_DNS_SERVERS" ] && OVPN_DNS_SERVERS=("8.8.8.8" "8.8.4.4")
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[ -z "$OVPN_PROTO" ] && OVPN_PROTO=udp
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[ -z "$OVPN_PORT" ] && OVPN_PORT=1194
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set -u
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[ "${#OVPN_ROUTES[@]}" == "0" ] && [ "$OVPN_DEFROUTE" == "1" ] && OVPN_ROUTES+=("192.168.254.0/24")
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# Preserve config
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if [ -f "$OVPN_ENV" ]; then
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bak_env=$OVPN_ENV.$(date +%s).bak
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echo "Backing up $OVPN_ENV -> $bak_env"
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mv "$OVPN_ENV" "$bak_env"
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fi
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# Save the current OVPN_ vars to the ovpn_env.sh file
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(set | grep '^OVPN_') | while read -r var; do
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echo "declare -x $var" >> "$OVPN_ENV"
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done
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conf=${OPENVPN:-}/openvpn.conf
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if [ -f "$conf" ]; then
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bak=$conf.$(date +%s).bak
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echo "Backing up $conf -> $bak"
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mv "$conf" "$bak"
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fi
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# Echo extra client configurations
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if [ ${#OVPN_EXTRA_CLIENT_CONFIG[@]} -gt 0 ]; then
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for i in "${OVPN_EXTRA_CLIENT_CONFIG[@]}"; do
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echo "Processing Extra Client Config: $i"
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done
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fi
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cat > "$conf" <<EOF
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server $(getroute $OVPN_SERVER)
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verb 3
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key $EASYRSA_PKI/private/${OVPN_CN}.key
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ca $EASYRSA_PKI/ca.crt
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cert $EASYRSA_PKI/issued/${OVPN_CN}.crt
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dh $EASYRSA_PKI/dh.pem
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tls-auth $EASYRSA_PKI/ta.key
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key-direction 0
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keepalive $OVPN_KEEPALIVE
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persist-key
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persist-tun
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proto $OVPN_PROTO
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# Rely on Docker to do port mapping, internally always 1194
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port 1194
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dev $OVPN_DEVICE$OVPN_DEVICEN
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status /tmp/openvpn-status.log
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user nobody
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group nogroup
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EOF
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if [ "${OVPN_DISABLE_PUSH_BLOCK_DNS}" == "1" ]; then
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echo "Disable default push of 'block-outside-dns'"
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else
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process_push_config "block-outside-dns"
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fi
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[ -n "$OVPN_TLS_CIPHER" ] && echo "tls-cipher $OVPN_TLS_CIPHER" >> "$conf"
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[ -n "$OVPN_CIPHER" ] && echo "cipher $OVPN_CIPHER" >> "$conf"
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[ -n "$OVPN_AUTH" ] && echo "auth $OVPN_AUTH" >> "$conf"
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[ -n "${OVPN_CLIENT_TO_CLIENT:-}" ] && echo "client-to-client" >> "$conf"
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[ "$OVPN_COMP_LZO" == "1" ] && echo "comp-lzo" >> "$conf"
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[ "$OVPN_COMP_LZO" == "0" ] && echo "comp-lzo no" >> "$conf"
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[ -n "${OVPN_FRAGMENT:-}" ] && echo "fragment $OVPN_FRAGMENT" >> "$conf"
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# Append route commands
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if [ ${#OVPN_ROUTES[@]} -gt 0 ]; then
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for i in "${OVPN_ROUTES[@]}"; do
|
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process_route_config "$i"
|
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done
|
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echo -e "\n### Route Configurations Below" >> "$conf"
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cat $TMP_ROUTE_CONFIGFILE >> "$conf"
|
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fi
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# Append push commands
|
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[ "$OVPN_DNS" == "1" ] && for i in "${OVPN_DNS_SERVERS[@]}"; do
|
||||
process_push_config "dhcp-option DNS $i"
|
||||
done
|
||||
|
||||
if [ "$OVPN_COMP_LZO" == "0" ]; then
|
||||
process_push_config "comp-lzo no"
|
||||
fi
|
||||
|
||||
[ ${#OVPN_PUSH[@]} -gt 0 ] && for i in "${OVPN_PUSH[@]}"; do
|
||||
process_push_config "$i"
|
||||
done
|
||||
|
||||
echo -e "\n### Push Configurations Below" >> "$conf"
|
||||
cat $TMP_PUSH_CONFIGFILE >> "$conf"
|
||||
|
||||
# Append optional OTP authentication support
|
||||
if [ -n "${OVPN_OTP_AUTH:-}" ]; then
|
||||
echo -e "\n\n# Enable OTP+PAM for user authentication" >> "$conf"
|
||||
echo "plugin /usr/lib/openvpn/plugins/openvpn-plugin-auth-pam.so openvpn" >> "$conf"
|
||||
echo "reneg-sec 0" >> "$conf"
|
||||
fi
|
||||
|
||||
# Append extra server configurations
|
||||
if [ ${#OVPN_EXTRA_SERVER_CONFIG[@]} -gt 0 ]; then
|
||||
for i in "${OVPN_EXTRA_SERVER_CONFIG[@]}"; do
|
||||
process_extra_config "$i"
|
||||
done
|
||||
echo -e "\n### Extra Configurations Below" >> "$conf"
|
||||
cat $TMP_EXTRA_CONFIGFILE >> "$conf"
|
||||
fi
|
||||
|
||||
set +e
|
||||
|
||||
# Clean-up duplicate configs
|
||||
if diff -q "${bak_env:-}" "$OVPN_ENV" 2>/dev/null; then
|
||||
echo "Removing duplicate back-up: $bak_env"
|
||||
rm -fv "$bak_env"
|
||||
fi
|
||||
if diff -q "${bak:-}" "$conf" 2>/dev/null; then
|
||||
echo "Removing duplicate back-up: $bak"
|
||||
rm -fv "$bak"
|
||||
fi
|
||||
|
||||
echo "Successfully generated config"
|
||||
|
|
@ -0,0 +1,132 @@
|
|||
#!/bin/bash
|
||||
|
||||
#
|
||||
# Get an OpenVPN client configuration file
|
||||
#
|
||||
|
||||
if [ "$DEBUG" == "1" ]; then
|
||||
set -x
|
||||
fi
|
||||
|
||||
set -e
|
||||
|
||||
if [ -z "$OPENVPN" ]; then
|
||||
export OPENVPN="$PWD"
|
||||
fi
|
||||
if ! source "$OPENVPN/ovpn_env.sh"; then
|
||||
echo "Could not source $OPENVPN/ovpn_env.sh."
|
||||
exit 1
|
||||
fi
|
||||
if [ -z "$EASYRSA_PKI" ]; then
|
||||
export EASYRSA_PKI="$OPENVPN/pki"
|
||||
fi
|
||||
|
||||
cn="$1"
|
||||
parm="$2"
|
||||
|
||||
if [ ! -f "$EASYRSA_PKI/private/${cn}.key" ]; then
|
||||
echo "Unable to find \"${cn}\", please try again or generate the key first" >&2
|
||||
exit 1
|
||||
fi
|
||||
|
||||
get_client_config() {
|
||||
mode="$1"
|
||||
echo "
|
||||
client
|
||||
nobind
|
||||
dev $OVPN_DEVICE
|
||||
remote-cert-tls server
|
||||
|
||||
remote $OVPN_CN $OVPN_PORT $OVPN_PROTO"
|
||||
if [ "$OVPN_PROTO" == "udp6" ]; then
|
||||
echo "remote $OVPN_CN $OVPN_PORT udp"
|
||||
fi
|
||||
if [ "$OVPN_PROTO" == "tcp6" ]; then
|
||||
echo "remote $OVPN_CN $OVPN_PORT tcp"
|
||||
fi
|
||||
for i in "${OVPN_EXTRA_CLIENT_CONFIG[@]}"; do
|
||||
echo "$i"
|
||||
done
|
||||
if [ "$mode" == "combined" ]; then
|
||||
echo "
|
||||
<key>
|
||||
$(cat $EASYRSA_PKI/private/${cn}.key)
|
||||
</key>
|
||||
<cert>
|
||||
$(openssl x509 -in $EASYRSA_PKI/issued/${cn}.crt)
|
||||
</cert>
|
||||
<ca>
|
||||
$(cat $EASYRSA_PKI/ca.crt)
|
||||
</ca>
|
||||
key-direction 1
|
||||
<tls-auth>
|
||||
$(cat $EASYRSA_PKI/ta.key)
|
||||
</tls-auth>
|
||||
"
|
||||
elif [ "$mode" == "separated" ]; then
|
||||
echo "
|
||||
key ${cn}.key
|
||||
ca ca.crt
|
||||
cert ${cn}.crt
|
||||
tls-auth ta.key 1
|
||||
"
|
||||
fi
|
||||
|
||||
if [ "$OVPN_DEFROUTE" != "0" ];then
|
||||
echo "redirect-gateway def1"
|
||||
fi
|
||||
|
||||
if [ -n "$OVPN_MTU" ]; then
|
||||
echo "tun-mtu $OVPN_MTU"
|
||||
fi
|
||||
|
||||
if [ -n "$OVPN_TLS_CIPHER" ]; then
|
||||
echo "tls-cipher $OVPN_TLS_CIPHER"
|
||||
fi
|
||||
|
||||
if [ -n "$OVPN_CIPHER" ]; then
|
||||
echo "cipher $OVPN_CIPHER"
|
||||
fi
|
||||
|
||||
if [ -n "$OVPN_AUTH" ]; then
|
||||
echo "auth $OVPN_AUTH"
|
||||
fi
|
||||
|
||||
if [ -n "$OVPN_OTP_AUTH" ]; then
|
||||
echo "auth-user-pass"
|
||||
echo "auth-nocache"
|
||||
fi
|
||||
|
||||
if [ "$OVPN_COMP_LZO" == "1" ]; then
|
||||
echo "comp-lzo"
|
||||
fi
|
||||
|
||||
if [ -n "$OVPN_OTP_AUTH" ]; then
|
||||
echo reneg-sec 0
|
||||
fi
|
||||
}
|
||||
|
||||
dir="$OPENVPN/clients/$cn"
|
||||
case "$parm" in
|
||||
"separated")
|
||||
mkdir -p "$dir"
|
||||
get_client_config "$parm" > "$dir/${cn}.ovpn"
|
||||
cp "$EASYRSA_PKI/private/${cn}.key" "$dir/${cn}.key"
|
||||
cp "$EASYRSA_PKI/ca.crt" "$dir/ca.crt"
|
||||
cp "$EASYRSA_PKI/issued/${cn}.crt" "$dir/${cn}.crt"
|
||||
cp "$EASYRSA_PKI/ta.key" "$dir/ta.key"
|
||||
;;
|
||||
"" | "combined")
|
||||
get_client_config "combined"
|
||||
;;
|
||||
"combined-save")
|
||||
mkdir -p "$dir"
|
||||
get_client_config "combined" > "$dir/${cn}-combined.ovpn"
|
||||
;;
|
||||
*)
|
||||
echo "This script can produce the client configuration in two formats:" >&2
|
||||
echo " 1. combined (default): All needed configuration and cryptographic material is in one file (Use \"combined-save\" to write the configuration file in the same path as the separated parameter does)." >&2
|
||||
echo " 2. separated: Separated files." >&2
|
||||
echo "Please specify one of those options as second parameter." >&2
|
||||
;;
|
||||
esac
|
||||
|
|
@ -0,0 +1,25 @@
|
|||
#!/bin/bash
|
||||
## @licence MIT <http://opensource.org/licenses/MIT>
|
||||
## @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 $OPENVPN/ovpn_env.sh."
|
||||
exit 1
|
||||
fi
|
||||
if [ -z "$EASYRSA_PKI" ]; then
|
||||
export EASYRSA_PKI="$OPENVPN/pki"
|
||||
fi
|
||||
|
||||
pushd "$EASYRSA_PKI"
|
||||
for name in issued/*.crt; do
|
||||
name=${name%.crt}
|
||||
name=${name#issued/}
|
||||
if [ "$name" != "$OVPN_CN" ]; then
|
||||
ovpn_getclient "$name" separated
|
||||
ovpn_getclient "$name" combined-save
|
||||
fi
|
||||
done
|
||||
popd
|
||||
|
|
@ -0,0 +1,43 @@
|
|||
#!/bin/bash
|
||||
|
||||
#
|
||||
# Initialize the EasyRSA PKI
|
||||
#
|
||||
|
||||
if [ "$DEBUG" == "1" ]; then
|
||||
set -x
|
||||
fi
|
||||
|
||||
set -e
|
||||
|
||||
source "$OPENVPN/ovpn_env.sh"
|
||||
|
||||
# Specify "nopass" as arg[2] to make the CA insecure (not recommended!)
|
||||
nopass=$1
|
||||
|
||||
# Provides a sufficient warning before erasing pre-existing files
|
||||
easyrsa init-pki
|
||||
|
||||
# CA always has a password for protection in event server is compromised. The
|
||||
# password is only needed to sign client/server certificates. No password is
|
||||
# needed for normal OpenVPN operation.
|
||||
easyrsa build-ca $nopass
|
||||
|
||||
easyrsa gen-dh
|
||||
openvpn --genkey secret $EASYRSA_PKI/ta.key
|
||||
|
||||
# Was nice to autoset, but probably a bad idea in practice, users should
|
||||
# have to explicitly specify the common name of their server
|
||||
#if [ -z "$cn"]; then
|
||||
# #TODO: Handle IPv6 (when I get a VPS with IPv6)...
|
||||
# ip4=$(dig +short myip.opendns.com @resolver1.opendns.com)
|
||||
# ptr=$(dig +short -x $ip4 | sed -e 's:\.$::')
|
||||
#
|
||||
# [ -n "$ptr" ] && cn=$ptr || cn=$ip4
|
||||
#fi
|
||||
|
||||
# For a server key with a password, manually init; this is autopilot
|
||||
easyrsa build-server-full "$OVPN_CN" nopass
|
||||
|
||||
# Generate the CRL for client/server certificates revocation.
|
||||
easyrsa gen-crl
|
||||
|
|
@ -0,0 +1,54 @@
|
|||
#!/bin/bash
|
||||
|
||||
if [ -z "$OPENVPN" ]; then
|
||||
export OPENVPN="$PWD"
|
||||
fi
|
||||
if ! source "$OPENVPN/ovpn_env.sh"; then
|
||||
echo "Could not source $OPENVPN/ovpn_env.sh."
|
||||
exit 1
|
||||
fi
|
||||
if [ -z "$EASYRSA_PKI" ]; then
|
||||
export EASYRSA_PKI="$OPENVPN/pki"
|
||||
fi
|
||||
|
||||
cd "$EASYRSA_PKI"
|
||||
|
||||
if [ -e crl.pem ]; then
|
||||
cat ca.crt crl.pem > cacheck.pem
|
||||
else
|
||||
cat ca.crt > cacheck.pem
|
||||
fi
|
||||
|
||||
echo "name,begin,end,status"
|
||||
for name in issued/*.crt; do
|
||||
path=$name
|
||||
begin=$(openssl x509 -noout -startdate -in $path | awk -F= '{ print $2 }')
|
||||
end=$(openssl x509 -noout -enddate -in $path | awk -F= '{ print $2 }')
|
||||
|
||||
name=${name%.crt}
|
||||
name=${name#issued/}
|
||||
if [ "$name" != "$OVPN_CN" ]; then
|
||||
# check for revocation or expiration
|
||||
command="openssl verify -crl_check -CAfile cacheck.pem $path"
|
||||
result=$($command)
|
||||
if [ $(echo "$result" | wc -l) == 1 ] && [ "$(echo "$result" | grep ": OK")" ]; then
|
||||
status="VALID"
|
||||
else
|
||||
result=$(echo "$result" | tail -n 1 | grep error | cut -d" " -f2)
|
||||
case $result in
|
||||
10)
|
||||
status="EXPIRED"
|
||||
;;
|
||||
23)
|
||||
status="REVOKED"
|
||||
;;
|
||||
*)
|
||||
status="INVALID"
|
||||
esac
|
||||
fi
|
||||
echo "$name,$begin,$end,$status"
|
||||
fi
|
||||
done
|
||||
|
||||
# Clean
|
||||
rm cacheck.pem
|
||||
|
|
@ -0,0 +1,34 @@
|
|||
#!/bin/bash
|
||||
|
||||
#
|
||||
# Generate OpenVPN users via google authenticator
|
||||
#
|
||||
|
||||
if ! source "$OPENVPN/ovpn_env.sh"; then
|
||||
echo "Could not source $OPENVPN/ovpn_env.sh."
|
||||
exit 1
|
||||
fi
|
||||
|
||||
if [ "x$OVPN_OTP_AUTH" != "x1" ]; then
|
||||
echo "OTP authentication not enabled, please regenerate configuration using -2 flag"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
if [ -z $1 ]; then
|
||||
echo "Usage: ovpn_otp_user USERNAME"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
# Ensure the otp folder is present
|
||||
[ -d /etc/openvpn/otp ] || mkdir -p /etc/openvpn/otp
|
||||
|
||||
# Binary is present in image, save an $user.google_authenticator file in /etc/openvpn/otp
|
||||
if [ "$2" == "interactive" ]; then
|
||||
# Authenticator will ask for other parameters. User can choose rate limit, token reuse policy and time window policy
|
||||
# Always use time base OTP otherwise storage for counters must be configured somewhere in volume
|
||||
google-authenticator --time-based --force -l "${1}@${OVPN_CN}" -s /etc/openvpn/otp/${1}.google_authenticator
|
||||
else
|
||||
# Skip confirmation if not running in interctive mode. Essential for integration tests.
|
||||
google-authenticator --time-based --disallow-reuse --force --rate-limit=3 --rate-time=30 --window-size=3 \
|
||||
-l "${1}@${OVPN_CN}" -s /etc/openvpn/otp/${1}.google_authenticator --no-confirm
|
||||
fi
|
||||
|
|
@ -0,0 +1,39 @@
|
|||
#!/bin/bash
|
||||
|
||||
#
|
||||
# Revoke a client certificate
|
||||
#
|
||||
|
||||
if [ "$DEBUG" == "1" ]; then
|
||||
set -x
|
||||
fi
|
||||
|
||||
set -e
|
||||
|
||||
if [ -z "$OPENVPN" ]; then
|
||||
export OPENVPN="$PWD"
|
||||
fi
|
||||
if ! source "$OPENVPN/ovpn_env.sh"; then
|
||||
echo "Could not source $OPENVPN/ovpn_env.sh."
|
||||
exit 1
|
||||
fi
|
||||
if [ -z "$EASYRSA_PKI" ]; then
|
||||
export EASYRSA_PKI="$OPENVPN/pki"
|
||||
fi
|
||||
|
||||
cn="$1"
|
||||
|
||||
if [ ! -f "$EASYRSA_PKI/private/${cn}.key" ]; then
|
||||
echo "Unable to find \"${cn}\", please try again or generate the key first" >&2
|
||||
exit 1
|
||||
fi
|
||||
|
||||
revoke_client_certificate(){
|
||||
easyrsa revoke "$1"
|
||||
echo "Generating the Certificate Revocation List :"
|
||||
easyrsa gen-crl
|
||||
cp -f "$EASYRSA_PKI/crl.pem" "$OPENVPN/crl.pem"
|
||||
chmod 644 "$OPENVPN/crl.pem"
|
||||
}
|
||||
|
||||
revoke_client_certificate "$cn"
|
||||
|
|
@ -0,0 +1,132 @@
|
|||
#!/bin/bash
|
||||
|
||||
#
|
||||
# Run the OpenVPN server normally
|
||||
#
|
||||
|
||||
if [ "$DEBUG" == "1" ]; then
|
||||
set -x
|
||||
fi
|
||||
|
||||
set -e
|
||||
|
||||
cd $OPENVPN
|
||||
|
||||
# bootstrap things?
|
||||
if [[ "$BOOTSTRAP_CA" == "TRUE" ]]; then
|
||||
echo "bootstrapping ca"
|
||||
|
||||
#check if it already exist to not overwrite things
|
||||
if [ -f "/etc/openvpn/ovpn_env.sh" ]; then
|
||||
echo "config already initialized - skipping"
|
||||
else
|
||||
ovpn_genconfig -u $PROTOCOL://$VPN_HOSTNAME
|
||||
source "$OPENVPN/ovpn_env.sh"
|
||||
easyrsa init-pki
|
||||
|
||||
easyrsa --batch --req-cn=$CA_SERVERNAME build-ca nopass
|
||||
|
||||
easyrsa gen-dh
|
||||
openvpn --genkey secret $EASYRSA_PKI/ta.key
|
||||
# For a server key with a password, manually init; this is autopilot
|
||||
easyrsa build-server-full "$OVPN_CN" nopass
|
||||
|
||||
# Generate the CRL for client/server certificates revocation.
|
||||
easyrsa gen-crl
|
||||
fi
|
||||
fi
|
||||
|
||||
|
||||
# Build runtime arguments array based on environment
|
||||
USER_ARGS=("${@}")
|
||||
ARGS=()
|
||||
|
||||
IPTABLES="iptables-nft"
|
||||
|
||||
# Checks if ARGS already contains the given value
|
||||
function hasArg {
|
||||
local element
|
||||
for element in "${@:2}"; do
|
||||
[ "${element}" == "${1}" ] && return 0
|
||||
done
|
||||
return 1
|
||||
}
|
||||
|
||||
# Adds the given argument if it's not already specified.
|
||||
function addArg {
|
||||
local arg="${1}"
|
||||
[ $# -ge 1 ] && local val="${2}"
|
||||
if ! hasArg "${arg}" "${USER_ARGS[@]}"; then
|
||||
ARGS+=("${arg}")
|
||||
[ $# -ge 1 ] && ARGS+=("${val}")
|
||||
fi
|
||||
}
|
||||
|
||||
# set up iptables rules and routing
|
||||
# this allows rules/routing to be altered by supplying this function
|
||||
# in an included file, such as ovpn_env.sh
|
||||
function setupIptablesAndRouting {
|
||||
$IPTABLES -t nat -C POSTROUTING -s $OVPN_SERVER -o $OVPN_NATDEVICE -j MASQUERADE 2>/dev/null || {
|
||||
$IPTABLES -t nat -A POSTROUTING -s $OVPN_SERVER -o $OVPN_NATDEVICE -j MASQUERADE
|
||||
}
|
||||
for i in "${OVPN_ROUTES[@]}"; do
|
||||
$IPTABLES -t nat -C POSTROUTING -s "$i" -o $OVPN_NATDEVICE -j MASQUERADE 2>/dev/null || {
|
||||
$IPTABLES -t nat -A POSTROUTING -s "$i" -o $OVPN_NATDEVICE -j MASQUERADE
|
||||
}
|
||||
done
|
||||
}
|
||||
|
||||
|
||||
addArg "--config" "$OPENVPN/openvpn.conf"
|
||||
|
||||
source "$OPENVPN/ovpn_env.sh"
|
||||
|
||||
mkdir -p /dev/net
|
||||
if [ ! -c /dev/net/tun ]; then
|
||||
mknod /dev/net/tun c 10 200
|
||||
fi
|
||||
|
||||
if [ -d "$OPENVPN/ccd" ]; then
|
||||
addArg "--client-config-dir" "$OPENVPN/ccd"
|
||||
fi
|
||||
|
||||
# When using --net=host, use this to specify nat device.
|
||||
[ -z "$OVPN_NATDEVICE" ] && OVPN_NATDEVICE=eth0
|
||||
|
||||
# Setup NAT forwarding if requested
|
||||
if [ "$OVPN_DEFROUTE" != "0" ] || [ "$OVPN_NAT" == "1" ] ; then
|
||||
# call function to setup iptables rules and routing
|
||||
# this allows rules to be customized by supplying
|
||||
# a replacement function in, for example, ovpn_env.sh
|
||||
setupIptablesAndRouting
|
||||
fi
|
||||
|
||||
# Use a copy of crl.pem as the CRL Needs to be readable by the user/group
|
||||
# OpenVPN is running as. Only pass arguments to OpenVPN if it's found.
|
||||
if [ "$EASYRSA_PKI/crl.pem" -nt "$OPENVPN/crl.pem" ]; then
|
||||
cp -f "$EASYRSA_PKI/crl.pem" "$OPENVPN/crl.pem"
|
||||
chmod 644 "$OPENVPN/crl.pem"
|
||||
fi
|
||||
|
||||
if [ -r "$OPENVPN/crl.pem" ]; then
|
||||
addArg "--crl-verify" "$OPENVPN/crl.pem"
|
||||
fi
|
||||
|
||||
ip -6 route show default 2>/dev/null
|
||||
if [ $? = 0 ]; then
|
||||
echo "Checking IPv6 Forwarding"
|
||||
if [ "$(</proc/sys/net/ipv6/conf/all/disable_ipv6)" != "0" ]; then
|
||||
echo "Sysctl error for disable_ipv6, please run docker with '--sysctl net.ipv6.conf.all.disable_ipv6=0'"
|
||||
fi
|
||||
|
||||
if [ "$(</proc/sys/net/ipv6/conf/default/forwarding)" != "1" ]; then
|
||||
echo "Sysctl error for default forwarding, please run docker with '--sysctl net.ipv6.conf.default.forwarding=1'"
|
||||
fi
|
||||
|
||||
if [ "$(</proc/sys/net/ipv6/conf/all/forwarding)" != "1" ]; then
|
||||
echo "Sysctl error for all forwarding, please run docker with '--sysctl net.ipv6.conf.all.forwarding=1'"
|
||||
fi
|
||||
fi
|
||||
|
||||
echo "Running 'openvpn ${ARGS[@]} ${USER_ARGS[@]}'"
|
||||
exec openvpn ${ARGS[@]} ${USER_ARGS[@]}
|
||||
|
|
@ -0,0 +1,12 @@
|
|||
#!/bin/sh
|
||||
|
||||
#
|
||||
# Get OpenVPN server status
|
||||
#
|
||||
if [ "$DEBUG" == "1" ]; then
|
||||
set -x
|
||||
fi
|
||||
|
||||
set -e
|
||||
|
||||
[-r /tmp/openvpn-status.log ] && tail -F /tmp/openvpn-status.log
|
||||
|
|
@ -0,0 +1,2 @@
|
|||
# podman run --rm -p 1194:1194/udp --cap-add=NET_ADMIN public.ecr.aws/zero-downtime/zdt-openvpn:a875375 ovpn_genconfig -d -2 -b -D -z -u test.com
|
||||
# podman run -v ovpn-data:/etc/openvpn --rm -p 1194:1194/udp --cap-add=NET_ADMIN public.ecr.aws/zero-downtime/zdt-openvpn:latest
|
||||
|
|
@ -0,0 +1,7 @@
|
|||
# Uses google authenticator library as PAM module using a single folder for all users tokens
|
||||
# User root is required to stick with an hardcoded user when trying to determine user id and allow unexisting system users
|
||||
# See https://github.com/google/google-authenticator-libpam#usersome-user
|
||||
auth required pam_google_authenticator.so secret=/etc/openvpn/otp/${USER}.google_authenticator user=root
|
||||
|
||||
# Accept any user since we're dealing with virtual users there's no need to have a system account (pam_unix.so)
|
||||
account sufficient pam_permit.so
|
||||
Loading…
Reference in New Issue