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wireguard-tools/contrib/external-tests/go/main.go

64 lines
2.6 KiB
Go

/* Copyright 2015-2016 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. */
package main
import (
"github.com/titanous/noise"
"net"
"time"
"bytes"
"crypto/rand"
"encoding/base64"
"encoding/binary"
"github.com/dchest/blake2s"
)
func assert(exp bool) {
if !exp {
panic("Assertion failed.")
}
}
func main() {
my_private, _ := base64.StdEncoding.DecodeString("WAmgVYXkbT2bCtdcDwolI88/iVi/aV3/PHcUBTQSYmo=")
my_public, _ := base64.StdEncoding.DecodeString("K5sF9yESrSBsOXPd6TcpKNgqoy1Ik3ZFKl4FolzrRyI=")
preshared, _ := base64.StdEncoding.DecodeString("FpCyhws9cxwWoV4xELtfJvjJN+zQVRPISllRWgeopVE=")
their_public, _ := base64.StdEncoding.DecodeString("qRCwZSKInrMAq5sepfCdaCsRJaoLe5jhtzfiw7CjbwM=")
cs := noise.NewCipherSuite(noise.DH25519, noise.CipherChaChaPoly, noise.HashBLAKE2s)
hs := noise.NewHandshakeState(noise.Config{CipherSuite: cs, Random: rand.Reader, Pattern: noise.HandshakeIK, Initiator: true, Prologue: []byte("WireGuard v0 zx2c4 Jason@zx2c4.com"), PresharedKey: preshared, StaticKeypair: noise.DHKey{Private: my_private, Public: my_public}, PeerStatic: their_public})
conn, _ := net.Dial("udp", "test.wireguard.io:51820")
now := time.Now()
tai64n := make([]byte, 12)
binary.BigEndian.PutUint64(tai64n[:], uint64(now.Unix()))
binary.BigEndian.PutUint32(tai64n[8:], uint32(now.UnixNano()))
initiation_packet := make([]byte, 5)
initiation_packet[0] = 1 /* Type: Initiation */
binary.LittleEndian.PutUint32(initiation_packet[1:], 28) /* Sender index: 28 (arbitrary) */
initiation_packet, _, _ = hs.WriteMessage(initiation_packet, tai64n)
hasher, _ := blake2s.New(&blake2s.Config{Size: 16, Key: preshared})
hasher.Write(their_public)
hasher.Write(initiation_packet)
initiation_packet = append(initiation_packet, hasher.Sum(nil)[:16]...)
initiation_packet = append(initiation_packet, bytes.Repeat([]byte{ 0 }, 16)...)
conn.Write(initiation_packet)
response_packet := make([]byte, 89)
conn.Read(response_packet)
assert(response_packet[0] == 2 /* Type: Response */)
their_index := binary.LittleEndian.Uint32(response_packet[1:])
our_index := binary.LittleEndian.Uint32(response_packet[5:])
assert(our_index == 28)
payload, send_cs, _, err := hs.ReadMessage(nil, response_packet[9:57])
assert(len(payload) == 0 && err == nil)
keepalive_packet := make([]byte, 13)
keepalive_packet[0] = 4 /* Type: Data */
binary.LittleEndian.PutUint32(keepalive_packet[1:], their_index)
binary.LittleEndian.PutUint64(keepalive_packet[3:], 0) /* Nonce */
keepalive_packet = send_cs.Encrypt(keepalive_packet, nil, nil)
conn.Write(keepalive_packet)
conn.Close()
}