commit bc567c478a50119d3f8ec61621a6c3885e033e30
Author: Paul-Christian Volkmer <code@pcvolkmer.de>
Date:   Sun Nov 27 14:16:49 2022 +0100

    Initial import

diff --git a/.gitignore b/.gitignore
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+++ b/.gitignore
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+config.d/
\ No newline at end of file
diff --git a/Dockerfile b/Dockerfile
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+FROM rust:slim AS build
+
+RUN rustup target add x86_64-unknown-linux-musl
+RUN apt update && apt install -y musl-tools musl-dev
+RUN cargo install --target x86_64-unknown-linux-musl boringtun-cli
+
+###
+
+FROM alpine
+
+ENV WG_QUICK_USERSPACE_IMPLEMENTATION boringtun
+ENV WG_LOG_LEVEL info
+ENV WG_LOG_FILE /var/log/boringtun
+ENV WG_SUDO 1
+
+RUN apk --update add iproute2 wireguard-tools-wg-quick libqrencode
+COPY --from=build /usr/local/cargo/bin/boringtun-cli /usr/local/bin/boringtun
+COPY create-config.sh entrypoint.sh ./
+
+ENTRYPOINT ["./entrypoint.sh"]
diff --git a/README.md b/README.md
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+# WireGuard docker image using BoringTun
+
+WireGuard docker setup using BoringTun.
+
+## Overview
+
+This project provides a docker image to create a simple personal WireGuard VPN using BoringTun.
+
+Using BoringTun enables the use of a userspace implementation on hosts that do not provide a WireGuard kernel module.
+
+Required configuration files will be generated on first run using environment variables. Client configurations are
+available as config files and QR codes.
+
+## Build
+
+When creating the image, BoringTun is compiled in a docker build stage and later copied into final image.
+
+```
+$ docker-compose build
+```
+
+## Run
+
+Customize the file `docker-compose`. You can change the following environment variables as needed
+
+* `DEVICE`: Some `tun` device, e.g. `tun0`
+* `SERVER_HOST`: The host name of your server
+* `SERVER_PORT`: The port the service should listen at
+* `NETWORK`: Some custom /24 network. e.g. `192.168.42.0`
+* `CLIENTS`: Number of clients for which configurations are to be created. Do not use more than 240 clients.
+
+If no environment variables are set, config creation script will ask you for settings.
+
+### Create config files
+
+Run the service to create required keys and config files in directory `config.d`. It will print out used configuration params.
+
+```
+$ docker-compose run wg
+
+Starting wireguard_wg_1 ... done
+Attaching to wireguard_wg_1
+wg_1  |  - Writing config to file tun0.conf
+wg_1  |  - Using endpoint hostname example.com
+wg_1  |  - Using port 51820
+wg_1  |  - Using network 192.168.42.0/24
+wg_1  |  - Generating 5 client configs and client QR codes
+wireguard_wg_1 exited with code 0
+```
+
+### Remove old and create new config files
+
+Remove existing config files or rename device in `docker-compose.yml`. Run command `docker-compose up` again.
+
+### Run the service
+
+Start the service in detached mode.
+
+```
+$ docker-compose up -d
+```
+
+## Client configurations
+
+You will find client configuration files for each client as config file and PNG file containing a QR code with
+client configuration in directory `config.d`.
\ No newline at end of file
diff --git a/config.d/.gitkeep b/config.d/.gitkeep
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index 0000000..e69de29
diff --git a/create-config.sh b/create-config.sh
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+++ b/create-config.sh
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+#!/bin/bash
+
+# Remove leftover config files
+rm *.conf 2>/dev/null
+rm *-client_*.png 2>/dev/null
+
+while [[ -z $DEVICE ]]; do
+  echo -n "Device (eg tun0):  "
+  read DEVICE
+done
+echo " - Writing config to file $DEVICE.conf"
+
+while [[ -z $SERVER_HOST ]]; do
+  echo -n "Endpoint hostname: "
+  read SERVER_HOST
+done
+echo " - Using endpoint hostname $SERVER_HOST"
+
+if [[ -z $SERVER_PORT ]]; then
+  echo -n "Endpoint port:     "
+  read SERVER_PORT
+fi
+echo " - Using port $SERVER_PORT"
+
+if [[ -z $NETWORK ]]; then
+  echo -n "Network (/24):     "
+  read NETWORK
+fi
+echo " - Using network $NETWORK/24"
+NETWORK=$(echo -n $NETWORK | sed -r "s/\.[0-9]+$//")
+
+while [[ -z $CLIENTS ]]; do
+  echo -n "Number of clients: "
+  read CLIENTS
+done
+echo " - Generating $CLIENTS client configs and client QR codes"
+
+SERVER_SEC_KEY=$(wg genkey)
+SERVER_PUB_KEY=$(echo $SERVER_SEC_KEY | wg pubkey)
+
+declare -a CLIENT_SEC_KEYS
+declare -a CLIENT_PUB_KEYS
+
+# Generate client keys
+for (( i=1; i<=$CLIENTS; i++ )); do
+  CLIENT_SEC_KEY=$(wg genkey)
+  CLIENT_PUB_KEY=$(echo $CLIENT_SEC_KEY | wg pubkey)
+
+  CLIENT_SEC_KEYS[$i]=$CLIENT_SEC_KEY
+  CLIENT_PUB_KEYS[$i]=$CLIENT_PUB_KEY
+done
+
+cat <<EOF >> $DEVICE.conf
+##############
+# SERVER
+##############
+
+[Interface]
+Address = $NETWORK.1/24
+ListenPort = $SERVER_PORT
+PrivateKey = $SERVER_SEC_KEY
+
+PostUp   = iptables -A FORWARD -i $DEVICE -j ACCEPT; iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
+PostDown = iptables -D FORWARD -i $DEVICE -j ACCEPT; iptables -t nat -D POSTROUTING -o eth0 -j MASQUERADE
+
+EOF
+
+# Print out client peers
+for (( i=1; i<=$CLIENTS; i++ )); do
+cat << EOF >> $DEVICE.conf
+# Client $i
+[Peer]
+PublicKey = ${CLIENT_PUB_KEYS[$i]}
+AllowedIPs = $NETWORK.$(($i+10))/32
+
+EOF
+done
+
+# Print out client configs
+
+for (( i=1; i<=$CLIENTS; i++ )); do
+cat <<EOF >> $DEVICE-client_$i.conf
+##############
+# CLIENT $i
+##############
+
+[Interface]
+Address = $NETWORK.$(($i+10))/24
+ListenPort = $SERVER_PORT
+PrivateKey = ${CLIENT_SEC_KEYS[$i]}
+
+[Peer]
+PublicKey = $SERVER_PUB_KEY
+AllowedIPs = 0.0.0.0/0, ::/0
+Endpoint = $SERVER_HOST:$SERVER_PORT
+EOF
+done
+
+# Create QR-codes for clients
+if [ ! -z "$(which qrencode 2>/dev/null)" ]; then
+  for (( i=1; i<=$CLIENTS; i++ )); do
+    qrencode -t png -o "$DEVICE-client_$i.png" < $DEVICE-client_$i.conf
+  done
+fi
diff --git a/docker-compose.yml b/docker-compose.yml
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+version: '2.1'
+
+services:
+
+  wg:
+    build: .
+    ports:
+      - "51820:51820/udp"
+    cap_add:
+      - NET_ADMIN
+    sysctls:
+      - net.ipv4.ip_forward=1
+      - net.ipv4.conf.all.rp_filter=2
+    devices:
+      - "/dev/net/tun:/dev/net/tun"
+    volumes:
+      - "./config.d:/etc/wireguard/"
+    environment:
+      DEVICE: tun0
+      SERVER_HOST: example.com
+      SERVER_PORT: 51820
+      NETWORK: 192.168.42.0
+      CLIENTS: 5
+
diff --git a/entrypoint.sh b/entrypoint.sh
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+#!/bin/sh
+
+set -e
+
+if [ -z $DEVICE ]; then
+  DEVICE="tun0"
+fi
+
+if [ ! -f "/etc/wireguard/$DEVICE.conf" ]; then
+  cd /etc/wireguard
+  /create-config.sh
+  exit 0
+fi
+
+echo "Starting wg-quick on $DEVICE"
+touch "${WG_LOG_FILE}"
+wg-quick up $DEVICE
+echo "done!"
+
+tail -f "${WG_LOG_FILE}"