Wireguard vpp-plugin

Overview

This plugin is an implementation of wireguard protocol for VPP. It allows one to create secure VPN tunnels. This implementation is based on wireguard-openbsd, using the implementaiton of ipip-tunnel.

Crypto

The crypto protocols:

• blake2s [Source]

OpenSSL:

• curve25519
• chachapoly1305

Plugin usage example

Usage is very similar to other wireguard implementations.

Create connection

Create keys:

> vpp# wg genkey
> *my_private_key*
> vpp# wg pubkey <my_private_key>
> *my_pub_key*

Create tunnel:

> vpp# create ipip tunnel src <ip4_src> dst <ip4_dst>
> *tun_name*
> vpp# set int state <tun_name> up
> vpp# set int ip address <tun_name> <tun_ip4>

After this we can create wg-device. The UDP port is opened automatically.

> vpp# wg set device private-key <my_private_key> src-port <my_port>

Now, we can add a peer configuration:

> vpp# wg set peer public-key <peer_pub_key> endpoint <peer_ip4> allowed-ip <peer_tun_ip4> dst-port <peer_port> tunnel <tun_name> persistent-keepalive <keepalive_interval>

If you need to add more peers, don't forget to first create another ipip-tunnel. Ping.

> vpp# ping <peer_tun_ip4>

Show config

To show device and all peer configurations:

> vpp# show wg

Remove peer

Peer can be removed by its public-key.

> vpp# wg remove peer <peer_pub_key>

This removes the associated ipip tunnel as well

### Clear all connections

> vpp# wg remove device

main next steps for improving this implementation

1. Use all benefits of VPP-engine.
2. Add IP6 support (currently only supports IPv4))
3. Add DoS protection as in original protocol (using cookie)