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