wireguard-tools/contrib/external-tests/rust/src/main.rs

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/* Copyright 2015-2016 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. */
extern crate screech;
extern crate crypto;
extern crate time;
extern crate rustc_serialize;
extern crate byteorder;
use screech::*;
use byteorder::{ByteOrder, BigEndian, LittleEndian};
use crypto::curve25519::curve25519_base;
use crypto::blake2s::Blake2s;
use rustc_serialize::base64::FromBase64;
use std::net::*;
fn memcpy(out: &mut [u8], data: &[u8]) {
for count in 0..data.len() {
out[count] = data[count];
}
}
fn main() {
let send_addr = "demo.wireguard.io:12913".to_socket_addrs().unwrap().next().unwrap();
let listen_addr = "0.0.0.0:0".to_socket_addrs().unwrap().next().unwrap();
let socket = UdpSocket::bind(listen_addr).unwrap();
let mut empty_payload = [0; 0];
let mut their_public = [0; 32];
memcpy(&mut their_public, &"qRCwZSKInrMAq5sepfCdaCsRJaoLe5jhtzfiw7CjbwM=".from_base64().unwrap());
let mut my_private = [0; 32];
memcpy(&mut my_private, &"WAmgVYXkbT2bCtdcDwolI88/iVi/aV3/PHcUBTQSYmo=".from_base64().unwrap());
let mut my_preshared = [0; 32];
memcpy(&mut my_preshared, &"FpCyhws9cxwWoV4xELtfJvjJN+zQVRPISllRWgeopVE=".from_base64().unwrap());
let my_public = curve25519_base(&my_private);
let mut my_keypair : Dh25519 = Default::default();
my_keypair.set(&my_private, &my_public);
let mut owner : HandshakeCryptoOwner<RandomOs, Dh25519, CipherChaChaPoly, HashBLAKE2s> = Default::default();
owner.set_s(my_keypair);
owner.set_rs(&their_public);
let mut cipherstate1 : CipherState<CipherChaChaPoly> = Default::default();
let mut cipherstate2 : CipherState<CipherChaChaPoly> = Default::default();
let mut handshake = HandshakeState::new_from_owner(&mut owner, true, HandshakePattern::IK, "WireGuard v0 zx2c4 Jason@zx2c4.com".as_bytes(), Some(&my_preshared[..]), &mut cipherstate1, &mut cipherstate2);
let now = time::get_time();
let mut tai64n = [0; 12];
BigEndian::write_i64(&mut tai64n[0..], 4611686018427387914ULL + now.sec);
BigEndian::write_i32(&mut tai64n[8..], now.nsec);
let mut initiation_packet = [0; 145];
initiation_packet[0] = 1; /* Type: Initiation */
LittleEndian::write_u32(&mut initiation_packet[1..], 28); /* Sender index: 28 (arbitrary) */
handshake.write_message(&tai64n, &mut initiation_packet[5..]);
let mut mac_material = [0; 143];
memcpy(&mut mac_material, &their_public);
memcpy(&mut mac_material[32..], &initiation_packet[0..113]);
let mut mac = [0; 16];
Blake2s::blake2s(&mut mac, &mac_material, &my_preshared);
memcpy(&mut initiation_packet[113..], &mac);
socket.send_to(&initiation_packet, &send_addr).unwrap();
let mut response_packet = [0; 89];
socket.recv_from(&mut response_packet).unwrap();
assert!(response_packet[0] == 2 /* Type: Response */);
let their_index = LittleEndian::read_u32(&response_packet[1..]);
let our_index = LittleEndian::read_u32(&response_packet[5..]);
assert!(our_index == 28);
let (payload_len, last) = handshake.read_message(&response_packet[9..57], &mut empty_payload).unwrap();
assert!(payload_len == 0 && last);
let mut keepalive_packet = [0; 29];
keepalive_packet[0] = 4; /* Type: Data */
LittleEndian::write_u32(&mut keepalive_packet[1..], their_index);
LittleEndian::write_u64(&mut keepalive_packet[5..], cipherstate1.n);
cipherstate1.encrypt(&empty_payload, &mut keepalive_packet[13..]); /* Empty payload means keepalive */
socket.send_to(&keepalive_packet, &send_addr).unwrap();
}